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Sample records for vieja relations temporelles

  1. Distribution spatio-temporelle du zooplancton en relation avec les ...

    African Journals Online (AJOL)

    Distribution spatio-temporelle du zooplancton en relation avec les facteurs abiotiques dans un hydrosystème urbain : le ruisseau Kondi (Douala, Cameroun) ... Conclusion et applications : Le coefficient de corrélation de Spearmann a permis de révéler des liaisons significatives entre Rotaria rotaria, Cephalodella gibba, ...

  2. Temporal relationships between the variations of diffuse gaseous emanations and the explosive activity of some active volcanoes of Costa-Rica, examples at the Arenal, Irazu and at the Rincon de la Vieja; Relations temporelles entre les variations des emanations gazeuses diffuses et l`activite explosive de quelques volcans actifs du Costa-Rica, exemples a l`Arenal, l`Irazu et au Rincon de la Vieja

    Energy Technology Data Exchange (ETDEWEB)

    Baubron, J.C. [BRGM, 45 - Orleans (France); Allard, P. [CEA Centre d`Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Direction des Sciences de la Matiere; Fernandez, E. [Obviscori, Heridia (Costa Rica); Hammouya, G. [Observatoire de la Soufriere, IPG-P, le Houelmont, 97 - Gourgeyre (France); Soto, G.J. [ICE, San Jose (Costa Rica)

    1996-12-31

    The surveillance of the temporal evolution of radon and helium concentrations in the carbon dioxide of crater fumaroles and gaseous emanations is performed since 1992 on the Irazu, Arenal, Poas and Rincon de la Vieja volcanoes in Costa-Rica. The {sup 3}He/{sup 4}He ratio is used as an indicator of the deep origin of the volcanic gas while radon is an indicator of the CO{sub 2} flux. Radon measurements performed on the Irazu show a continuous decay of radon concentration in the intra-crater fumaroles with an important increase of the gaseous flux since 1992. On the contrary, the external fumaroles on the NW flank were characterized by an important increase in radon concentration in 1994 with a stable flux. The radon surveillance performed in soils around the volcano has shown an intense increase of the diffuse gaseous flows probably linked to the micro-seismic activity of the volcano. Similar observations are reported for the Rincon de la Vieja volcano and correlated with its eruptive history and its phreatic and phreato-magmatic activity. Short paper. (J.S.).

  3. Habana Vieja, patrimonio vivo

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    Marlén Palet

    2007-01-01

    Full Text Available Con la declaratoria del Centro Histórico como Monumento Nacional en 1978, el inicio de los Planes de Restauración en 1981, y un año después, la inclusión en la lista del Patrimonio Mundial, se inició una etapa en que, no ajenos a una tendencia internacional, se veía el patrimonio cultural y lo relativo a su salvaguarda, bajo un prisma de mecenazgo, es decir, la necesidad de recuperar los valores heredados en su dimensión sociocultural…Ya más adelante fuimos incorporando la temática económica en la salvaguarda patrimonial, donde el territorio adquiere la dimensión de activo económico capaz de auto-sustentar su propia recuperación (Leal, 2004. Las palabras del Historiador de La Habana, en la conferencia dictada en el Forum Universal de las Culturas en Barcelona 2004, sintetizan en pocas líneas lo mucho que en apenas 25 años se ha realizado en materia de rehabilitación del casco histórico de la capital cubana. Indudablemente, una sabia conducción y una voluntad política de los Gobiernos, tanto Local como Nacional, han comenzado a dar resultados favorables en la comunidad. El objetivo del presente trabajo es brindar un análisis del impacto de la rehabilitación de La Habana Vieja en el desenvolvimiento de la población y en la valoración y protagonismo que va activándose en la propia localidad para llevar a cabo la estrategia de desarrollo trazada. Numerosos son los programas que se llevan a cabo con éxito de forma participativa en simultáneo con la obra restauradora. Desde el rescate de monumentos y viejas tradiciones, hasta la atención especializada de los grupos poblacionales más vulnerables. El espacio urbano va cambiando, adquiriendo nuevas funciones u otras perdidas en etapas precedentes; la reconstrucción que se experimenta lleva implícito nuevos procesos territoriales que van remodelando el sistema ambiental local.

  4. Original Paper Evolution spatiale et temporelle des dégâts du ...

    African Journals Online (AJOL)

    RESUME. Le jasside Jacobiella facialis est un ravageur piqueur-suceur du cotonnier en Côte d'Ivoire. Depuis quelques années, ses attaques sont persistantes sur tout le cycle cultural malgré les traitements insecticides. Cette étude visait à analyser les distributions spatio-temporelles des dégâts du ravageur en relation ...

  5. Renewable Energy Development on Tribal Lamds of Viejas

    Energy Technology Data Exchange (ETDEWEB)

    Terrence Meyer (Black & Veatch); Mike Elenbaas (Black & Veatch)

    2005-09-30

    The purpose of this study is to investigate the feasibility of Renewable Energy Development on the lands of the Viejas Band of the Kumeyaay Indian Nation. In addition, the study will investigate the feasibility of forming a renewable energy based tribal utility. Viejas contracted with Black & Veatch and Fredericks, Pelcyger & Hester, LLC to assist in the development of a feasibility study to ascertain the economics and operational factors of forming an electric and water utility. This report is the result of the investigation conducted by Black & Veatch, with input from Viejas Tribal Government.

  6. Viejas historias de Castilla la Vieja (1969: proverbs in the literary texts of Miguel Delibes

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    Marina García Yelo

    2011-12-01

    Full Text Available The author of the article presents the general classification of how proverbs are inserted into texts and analyzes three basic types of enunciation in literary text Viejas historias de Castilla la Vieja (1969 of Spanish writer Miguel Delibes. In the seventeen chapters we read about the everyday, iterative and timeless life of the geographical environment of the people of Castile, with special focus on their customs and language. The latter is characterized by all kinds of proverbs. Delibes employs proverbs to show a popular language, full of references to the collective knowledge, and inserts them in the discourses of the characters in two fundamental ways: directly without referring to the fact that this is a judgmental statement or indirectly.

  7. Contaminants survey of La Sal Vieja, Willacy County, Texas, 1989

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Organochlorine, trace element, and petroleum hydrocarbon contaminants were examined in sediments from two hypersaline lakes comprising the La Sal Vieja complex in...

  8. Emergence de circuits neuromimétiques orientés sous l'effet de l'épissage associé à la plasticité synaptique à modulation temporelle relative (STDP)

    OpenAIRE

    Iglesias, Javier

    2005-01-01

    président: Prof. François Grize rapporteurs: Prof. Juan Manuel Moreno Arostegui, Dr. Brigitte Quenet codirecteurs: Prof. Alessandro E.P. Villa, Marco Tomassini expert: Dr. Jean-François Vibert; Massive synaptic pruning following over-growth is a general feature of mammalian brain maturation. Pruning starts near time of birth and is completed by time of sexual maturation. Trigger signals able to induce synaptic pruning could be related to dynamic functions that depend on the timing of action p...

  9. Distribution spatio-temporelle du zooplancton en relation avec les ...

    African Journals Online (AJOL)

    SARAH

    31 oct. 2014 ... utilisant les clés et ouvrages de Koste (1978), Durand et. Lévêque (1980), Pourriot et Francez (1986), Shiel (1995),. Segers (1996), Zébazé Togouet (2000) et Fernando. (2002) suivant les techniques classiques. Les dénombrements ont ensuite été effectués à la loupe binoculaire de marque WILD M5 en ...

  10. Plant remains of archaeological site Casa Vieja, Callango (Ica

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    José Roque

    2013-06-01

    Full Text Available A paleoethnobotanical study was carried out at the Middle Horizon archaeological site of Casa Vieja, located in Callango within the Lower Ica Valley. A total of 23 species were identified, all determined to be of the Magnoliopyta Division, 78 % (or 18 species were Magnoliopsid and 22% (or 15 species Liliopsid. The Fabaceae are the best represented family with 6 species. Most of the analyzed samples correspond to seeds of Gossypium barbadense “cotton”. Seventy percent of the species were probably used as food; 48% for artifact-making and construction and 52% for medicinal and curative purposes.

  11. Les usages de la flexibilité temporelle chez les enseignantes du secondaire The uses of flexible time by female secondary-school teachers

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    Julie Jarty

    2009-09-01

    Full Text Available De par sa flexibilité temporelle, il existe une perception largement répandue selon laquelle la profession enseignante serait woman-friendly, « bien pour une femme ». Le « plafond de verre » est pourtant une réalité pour de nombreuses femmes au sein de l’enseignement du second degré. Centré sur une étude des perceptions et des pratiques temporelles au sein de ce groupe professionnel dans une perspective de genre, cet article s’appuie sur une analyse critique des discours de 40 entretiens individuels réalisés auprès d’hommes et de femmes enseignant-e-s du secondaire et de leurs « carnets-temps ». Il s’agit d’explorer la manière dont ils et elles utilisent leur temps et cette flexibilité professionnelle. Le résultat de cette recherche permet de montrer que les expériences temporelles sexuées sont particulièrement prédominantes, ce qui contribue à expliquer les difficultés des femmes enseignantes à accéder aux positions les plus prestigieuses et les mieux rémunérées de la hiérarchie. Néanmoins, la mobilisation d’une typologie des expériences temporelles des enseignantes nous conduit à identifier l’existence de discours alternatifs, reconnaissant ainsi les contrastes du degré selon lequel les rapports sociaux de sexe sont reproduits, reconfigurés ou transformés au sein de la profession.Because of its temporal flexibility, there is a widespread notion that the teaching profession is ‘woman-friendly’ or “good for women”. However, there is extensive evidence that a ‘glass ceiling’ exists for female secondary school teachers too. Based on a study of temporal perceptions and practices within the teaching profession in a gendered perspective, this paper draws on the critical discourse analysis of forty individual interviews conducted with male and female secondary school teachers and of their schedules. The aim was to examine the use they make of their time and professional flexibility

  12. New structural, hydrogeological and hydrothermal insights on Cumbre Vieja (La Palma, Canary Islands, Spain)

    Science.gov (United States)

    Barde-Cabusson, S.; Finizola, A.; Torres, P.; Víctor Villasante-Marcos, V.; Abella, R.; Aragó, S.; Berthod, C.; Ibarra, P.; Geyer Traver, A.

    2013-12-01

    Determining the link between shallow structure and volcanism is a topic of interest in Volcanology. We carried out a geophysical study devoted to the characterization of the major structural limits influencing volcanic hydrothermal activity and underground meteoric circulations in La Palma (Canary Islands). Since 1 Ma volcanic activity concentrates at the southern half of the island, on the Cumbre Vieja volcanic rift-zone. During the 1949 eruption a N-S fault system, facing west, developed in the summit area of Cumbre Vieja. This was interpreted as the surface expression of an incipient deformation zone on the western flank. The distribution of the recent activity and faulting indicate that a discontinuity may be present beneath the western flank of Cumbre Vieja, along which a future collapse may occur. Our study, which combines the application of self-potential and soil temperature measurements, provides new information to characterize and locate the limits guiding upward or downward fluid circulation and possibly associated to future failures and potential landslides on the Cumbre Vieja rift-zone. We found a clear asymmetry of the self-potential signal between the eastern and the western flanks of Cumbre Vieja. Strong infiltration of meteoric water seems to affect most of the summit axis while we observe poor variation in the self-potential values on the western flank. This could be explained by a constant thickness of the vadose zone on this flank, i.e., the presence of an impermeable layer at constant depth. This layer could correspond to the landslide interface associated to the previous Cumbre Nueva edifice destruction, on which Cumbre Vieja is currently growing. This constant self-potential pattern is interrupted by at least one other main infiltration zone, near Tajuya volcano, at 1200 m a.s.l. on the western flank, where field observation allowed identifying a small horst-graben system. However it is not clear if this fault system results from local

  13. Hoy hace: la erupción del Rincón de la Vieja el 8 de mayo de 1991

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    Soto Bonilla, Gerardo

    2005-08-01

    Full Text Available Uno de los eventos volcánicos importantes del siglo XX en Costa Rica fue el ocurrido el 8 de mayo del año 1991 en el Volcán Rincón de la Vieja. A continuación, se muestra la información recopilada en la serie Hoy hace. concerniente a la emergencia suscitada en esa ocasión. Se incluye una relación de las principales observaciones reportadas con respecto al Volcán desde el año 1765 hasta el año 1998. El documento explica el mecanismo de la erupción principal y enlista las actividades posteriores que se dieron One of the important volcanic events of the 20th Century in Costa Rica was the one of May 8, 1991 at the Rincón de la Vieja Volcano. Following, it shows the information collected in the series Today in History (Hoy hace related to the emergency generated at that moment. It includes a relation to the main observations reported in regards to the Volcano from the year 1765 to the year 1998. The document explains the mechanism of the main eruption and lists the posterior activities

  14. [Costs estimation of tuberculosis cases detection. La Habana Vieja Municipality, Cuba. 2002].

    Science.gov (United States)

    Peralta Pérez, Mariana; Gálvez González, Ana M; González Ochoa, Edilberto

    2007-01-01

    The Cuban Tuberculosis Control Program has been able to significantly reduce the tuberculosis cases incidence in all its forms. La Habana Vieja municipality has maintained the highest incidence in Havana City province during 5 years and one of the highest in the country. To estimate the cost of Tuberculosis cases detection in Habana Vieja municipality, in the year 2002. A descriptive retrospective study to estimate the costs with social perspective was carried out. The costs of cases detection and their departures in health facilities were considered. For patients with cough/expectoration > or =14 days (RS+14) the pocket expense and monetary losses for labour absences were considered. Costs were expressed in equivalent Cuban pesos to American dollars (1 CUC = 1 USD). Information from official records in health institutions and from interviews to workers and RS+14 was obtained. Social cost of tuberculosis cases detection for an RS+14 was in average 24,11 CUC, and institutional cost was 12,55; for clinical investigation 0.37; for sputum smear microscopy 2,25; for culture 7,05; for thorax X-ray 1,67; for notification 3,07; and for registering 0,36. The biggest costs were observed in sputum smear microscopies and cultures performance; salaries and reagents were the issues contributing more in that cost. The results obtained in this study could be extrapolated to other municipalities in the country with social and economic conditions similar to La Habana Vieja.

  15. Stability analysis of Western flank of Cumbre Vieja volcano (La Palma) using numerical modelling

    Science.gov (United States)

    Bru, Guadalupe; Gonzalez, Pablo J.; Fernandez-Merodo, Jose A.; Fernandez, Jose

    2016-04-01

    La Palma volcanic island is one of the youngest of the Canary archipelago, being a composite volcano formed by three overlapping volcanic centers. There are clear onshore and offshore evidences of past giant landslides that have occurred during its evolution. Currently, the active Cumbre Vieja volcano is in an early development state (Carracedo et al., 2001). The study of flank instability processes aim to assess, among other hazards, catastrophic collapse and potential tsunami generation. Early studies of the potential instability of Cumbre Vieja volcano western flank have focused on the use of sparse geodetic networks (Moss et al. 1999), surface geological mapping techniques (Day et al. 1999) and offshore bathymetry (Urgeles et al. 1999). Recently, a dense GNSS network and satellite radar interferometry results indicate ground motion consistent with deep-seated creeping processes (Prieto et al. 2009, Gonzalez et al. 2010). In this work, we present a geomechanical advanced numerical model that captures the ongoing deformation processes at Cumbre Vieja. We choose the Finite Elements Method (FEM) which is based in continuum mechanics and is the most used for geotechnical applications. FEM has the ability of using arbitrary geometry, heterogeneities, irregular boundaries and different constitutive models representative of the geotechnical units involved. Our main contribution is the introduction of an inverse approach to constrain the geomechanical parameters using satellite radar interferometry displacements. This is the first application of such approach on a large volcano flank study. We suggest that the use of surface displacements and inverse methods to rigorously constrain the geomechanical model parameter space is a powerful tool to understand volcano flank instability. A particular important result of the studied case is the estimation of displaced rock volume, which is a parameter of critical importance for simulations of Cumbre Vieja tsunamigenic hazard

  16. Viejas y nuevas formas de hacer política: el Buen gobierno comunitario

    OpenAIRE

    Mandujano Estrada, Miguel

    2016-01-01

    En el marco de las viejas y nuevas formas de acción política, este trabajo presenta el Buen gobierno comunitario, una experiencia de intensificación democrática llevada a cabo por el pueblo indígena de Cherán, en México. En el centro del argumento, la propuesta presenta el caso como una imagen del sufrimiento y crítica a la idea de Estado nación en la que el Buen gobierno se alza como una forma decolonial más allá de la línea abismal moderna

  17. [A new species of Euglena (Euglenozoa: Euglenales) isolated from extreme environments in "boiling mudflats" of Rincón de la Vieja volcano, Costa Rica].

    Science.gov (United States)

    Sittenfeld, Ana; Vargas, Maribelle; Sánchez, Ethel; Mora, Marielos; Serrano, Aurelio

    2004-03-01

    A new species of euglena isolated from a hot and acid mud pool located in Las Pailas de Barro, Volcán Rincón de la Vieja, Costa Rica is described. This species inhabits hot and acid environments. Euglena pailasensis sp. nov. main features are: the absence of flagella, the presence filaments like "pilis", the presence of chloroplasts with pyrenoids crossed by several tylakoids, and acid and heat tolerance. Molecular phylogeny studies using 18S rDNA and Gap C genes indicated that the new species is related to E. mutabilis. Its taxonomic characters based on morphology, biology and sequence of the 18S rDNA and Gap C genes are discussed and compared with other closely related species of the genus.

  18. Composition Patterns of Waterbirds from La Vieja River, Geographic Valley of Cauca River, Colombia

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    Laura Milena Ramírez-Urrea

    2014-02-01

    Full Text Available We compiled and analyzed data gathered from observations during the period 2001-2013 in three sectors along La Vieja river, located in the Cauca river valley, Colombia. We describe spatial and temporal aspects of such dataset, focusing in indentify patterns of species’ composition and abundance. We recorded 28 waterbird species in 33 transects, being 22 species observed in more than 50 % of these transects. The species richness among transects did not shows significant differences. However, two cluster analyses, considering both presence/absence and abundance data, showed that there is spatial structure in the species composition along the river. In contrast, although observations were conducted during more than ten years there is no evidence of temporal changes in species composition. Still, some species showed increase ordecrease trends in their frequency. We present a new record for one species (Chloroceryle aenea for the region. Despite that the landscape surrounding La Vieja river have faced a high anthropogenic impact, the river still presents a significant diversity of waterbirds, which could add value to the conservation plans in the zone. PATRONES DE LA COMPOSICIÓN DE AVES ACUÁTICAS EN ELRÍO LA VIEJA, VALLE GEOGRÁFICO DEL RÍO CAUCA, COLOMBIARESUMENCompilamos y analizamos los datos de observaciones realizadas entre los años 2001 y 2013 en tres sectores a lo largo del cauce del río La Vieja, ubicado en el valle geográfico del río Cauca, Colombia. Describimos los datos espacial y temporalmente, enfocándonos en identificar patrones de composición y abundancia de especies. Registramos 28 especies de aves acuáticas en 33 transectos, siendo 22 especies observadas en más del 50 % de los transectos. Las diferencias en el número de especies por transecto no fueron significativas entre los tres sectores del río. Sin embargo, dos análisis de agrupamiento, considerando tanto los datos de presencia/ausencia como de

  19. Connections between hyper-acid crater lakes and flank springs: new evidence from Rincón de la Vieja volcano (Costa Rica)

    Science.gov (United States)

    Martínez, M.; Fernández, E.; Sáenz, W.; van Bergen, M. J.; Ayres, G.; Pacheco, J. F.; Brenes, J.; Avard, G.; Malavassi, E.

    2012-04-01

    Rincón de la Vieja, a complex andesitic stratovolcano in NW Costa Rica, shows various hydrothermal surface manifestations that comprise: (1) A hyper-acid crater lake and subaerial fumaroles receiving direct input of fluids of magmatic origin, (2) Acid thermal discharges along the northeastern slopes of the volcano that feed the headwaters of the Cucaracho river, and (3) Small lakes and a geothermal field with bubbling-boiling mud pools, acid-sulfate springs, steaming ground and fumarolic emissions in a region on the western flank. Here the streams are of relatively low flow rate and their chemical signatures correspond to that of deep fluids from an extensive geothermal reservoir mixed with shallow meteoric water. Physico-chemical properties of the sulfate-chloride hyper-acid lake (T=28-58 °C; pH between 1.2 and haciendas as far as 5 to 7 km downstream, destroying vegetation, infrastructure and wild life. After ca. 13 years of relative quiescence, phreatic eruptions in the crater lake renewed in August 2011 and continued intermittently throughout September-November, accompanied by visible signs of stronger convection. In the same period, continuous monitoring revealed a progressive rise in temperature (from 32.4 to 34.0°C) in Spring 4. This coincidence provides new evidence for the postulated hydraulic connection between the dilute acid springs at the NE flank of the volcano and the crater lake. We will present physico-chemical data that further support this link, and discuss the potential of geochemical monitoring of the springs for surveillance purposes, as their location is safer and more accessible than the active crater. Reference: Kempter, K.A., Rowe, G.L. 2000. Leakage of active crater lake brine through the north flank at Rincón de La Vieja volcano, northwest Costa Rica, and implications for crater collapse. J. Volcanol. Geotherm. Res., 97: 143-160.

  20. Évolution spatio-temporelle des écosystèmes forestiers à pin D’Alep de L’Aurès oriental en Algérie

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    Kenza Garah

    2016-12-01

    Full Text Available CGarah, K., Chafai, C. and Bentouati, A. Évolution spatio-temporelle des écosystèmes forestiers à pin d’Alep de l'Aurès oriental en Algérie. 2016. Lebanese Science Journal, 17(2: 104-116. The present study falls within the framework of a characterization of the spatiotemporal dynamics of land use between 1987 and 2014 of a forest area located in eastern Aures. The method of diachronic comparison of satellite images was adopted. Results revealed profound regressive changes in aurasian forest during the last 27 years (from 1987 to 2014. This regression of vegetation cover is mainly localized in Aleppo pine forest stands which predominates the study area. The current degradation would be related to recent climate changes which have amplified the regression of certain forest ecosystems of the region.

  1. Vieja Europa, nuevo orden: propuesta gráfica de contrapropaganda

    OpenAIRE

    GARCÍA CAZORLA, ÁNGELA

    2015-01-01

    Vieja Europa, Nuevo Orden juega a descodificar los mensajes y otorgarles una nueva significación. Elaborar un discurso crítico a través de esta alteración exige sumergirse en la investigación de los códigos hegemónicos que se utilizan en la divulgación política, poniendo al servicio de la propuesta sus mecanismos y herramientas. Esta pretensión conduce a realizar un análisis histórico sobre la vinculación y el papel del arte y el diseño gráfico en la actividad propagandís...

  2. Pleistocene to holocene expansion of the black-belt cichlid in Central America, Vieja maculicauda (Teleostei: Cichlidae.

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    Caleb D McMahan

    Full Text Available The distributions of many Northern Hemisphere organisms have been influenced by fluctuations in sea level and climatic conditions during Pleistocene interglacial periods. These cycles are associated with range contraction and refugia for northern-distributed organisms as a response to glaciers. However, lower sea levels in the tropics and sub-tropics created available habitat for expansion of the ranges of freshwater organisms. The goal of this study was to use ecological niche modeling to test the hypothesis of north to south range expansion of Vieja maculicauda associated with Pleistocene glacial cycles. Understanding the biogeography of this widespread species may help us better understand the geology and interconnectivity of Central American freshwaters. Occurrence data for V. maculicauda was based on georeferencing of all museum records of specimens recovered from FishNet2. General patterns of phylogeographic structure were assessed with mtDNA. Present day niche models were generated and subsequently projected onto paleoclimatic maps of the region during the Last Interglacial, Last Glacial Maximum, and mid-Holocene. Phylogenetic analysis of mtDNA sequence data showed no phylogeographic structure throughout the range of this widespread species. Present day niche models were congruent with the observed distribution of V. maculicauda in Central America. Results showed a lack of suitable freshwater habitat in northern Central America and Mexico during the Last Interglacial, with greatest range expansion during the Last Glacial Maximum and mid-Holocene. Results support the hypothesis of a north to south range expansion of V. maculicauda associated with glacial cycles. The wide distribution of this species compared to other closely related cichlids indicates the latter did not respond to the degree of V. maculicauda in expansion of their distributions. Future work aimed at comparisons with other species and modeling of future climatic scenarios

  3. La villa y la encomienda de Calatrava la Vieja en la Baja Edad Media

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    Enrique Rodríguez-Picavea Matilla

    1999-01-01

    Full Text Available Este artículo analiza el período menos conocido de la historia de Calatrava la Vieja, un lugar clave en la frontera entre Castilla y al-Andalus hasta la segunda década del siglo XIII. Precisamente nuestro trabajo se inicia en ese momento, cuando la historia de la villa experimenta un cambio sustancial como consecuencia del traslado de la sede de la Orden de Calatrava a un nuevo emplazamiento más meridional, que a partir de entonces sería conocido como Calatrava la Nueva. Asistimos así a la prolongada decadencia de la primitiva Calatrava, al desarrollo de una encomienda de la citada Orden militar y a la definitiva despoblación de la villa y su conversión en rentable dehesa de explotación ganadera. Además se estudian específicamente las actividades económicas y la peculiar organización eclesiástica.This article analyses the least known historical period of Calatrava la Vieja, a key place in the boundary between Castilla and Al-Andalus, until the second decade of the XIII th century. It is in that precise moment where this report starts, just when the history of the city experíments a substantial change due to the move of the Order of the Knights of Calatrava headquarters to the south, to a place since then known as Calatrava la Nueva. It is observed, therefore, the prolonged decline process of the oíd Calatrava, as well as the development of an «encomienda» or concession of the mentioned Military Order and to the total depopulation of the city and its convertion into a productive animal farm. In addition, the economic activity and the particular ecclesiastic organization are specifically studied.

  4. Analytical representation of time correlation functions and application to relaxation problems; Representation analytique des fonctions de correlation temporelle et application a des problemes de relaxation

    Energy Technology Data Exchange (ETDEWEB)

    Dupuis, M. [Commissariat a l' Energie Atomique, 91 - Saclay (France). Centre d' Etudes Nucleaires, departement de physico-chimie, services des isotopes stables

    1971-07-01

    Two analytical representations of the Laplace transform of the time autocorrelation of a dynamical variable, namely the moment expansion and Mori's continued fraction expansion, are investigated from the point of view of structure and convergence properties, and the relation between them is established. The general theory is applied first to a dynamical model exactly solvable, the isotopic impurity in a linear chain of coupled harmonic oscillators, and then to two stochastic models recently introduced by Gordon for the rotational diffusion of molecules. In the latter case, the continued fraction expansion yields simple analytical expressions for the infrared absorption band shapes, showing that these models contain all the features of observed shapes in compressed gases, liquids and solutions. (author) [French] Deux representations analytiques de la transformee de Laplace de la fonction d'autocorrelation temporelle d'une variable dynamique, le developpement en moments et le developpement en fraction continue recemment introduit par Mori, sont etudiees du point de vue de leurs proprietes de structure et de convergence, en meme temps que la relation qui existe entre elles est etablie. La theorie generale est appliquee, d'une part, a un modele dynamique exactement soluble, celui d'une particule isotopique dans une chaine lineaire d'oscillateurs harmoniques couples, et, d'autre part, a deux modeles stochastiques recemment proposes par Gordon pour la diffusion rotationnelle des molecules. Dans ce dernier cas, la voie de la fraction continue fournit des expressions analytiques simples pour les formes de bande d'absorption infrarouge, montrant que ces modeles possedent les caracteristiques des formes observees dans les gaz comprimes, les liquides ou les solutions. (auteur)

  5. La fabrique des normes temporelles du travail Manufacturing time standards for work La fábrica de las normas temporales de trabajo

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    Jens Thoemmes

    2012-12-01

    Full Text Available Cet article porte sur la provenance des normes temporelles du travail. Il indiquera d’une part que ces normes résultent des orientations globales d’une société, de la formation d’une conscience des temporalités, mais aussi de la mobilisation du mouvement syndical et ouvrier sans lesquels la réduction du temps de travail n’aurait pas vu le jour. D’autre part, l’origine des normes temporelles est liée aux dynamiques locales, notamment à celles des entreprises, aux relations sociales, mais aussi au type de production qui a contribué à définir les règles effectives des temps sociaux. Nous retracerons d’abord l’émergence d’un droit au temps libre pour les travailleurs qui reste tributaire des évolutions sociétales. Ensuite, nous montrerons les temps du sujet en situation indiquant la persistance de multiples tensions. Enfin, nous avancerons que le passage du temps décrété au temps négocié ouvre un espace de discussion qui, à certaines conditions, pourrait donner lieu à une nouvelle politique des temps davantage en lien avec les besoins du monde du travail.The article focuses on the origin of time standards for work. On one hand, it demonstrates that these reflect a society’s general orientations and evolving awareness of temporalities, as well as its mobilisation of union and worker movements without which it is impossible to reduce working hours. On the other hand, time standards also originate in local dynamics, notably where this involves companies, social relations but also production types that help to define the rules by which social time are actually governed. The paper starts by retracing the emergence of workers’ right to free time, which continues to depend on social developments. We then address how employees spend their time in work situations and discover a number of ongoing tensions. Lastly, we argue that the shift from decreed to negotiated time opens up a space for discussion that, under

  6. Une nouvelle approche spatio-temporelle et analytique pour la conservation des peintures murales sur le long terme

    OpenAIRE

    Vallet, Jean-Marc; De Luca, Livio; Feillou, Marie

    2012-01-01

    La conservation des peintures murales nécessite de comprendre la nature des désordres les affectant, d’évaluer la qualité dans le temps des restaurations et des mesures conservatoires. Pour ce faire et du fait d’une documentation importante, hétérogène, du caractère multicouches et multimatériaux des peintures murales, de leur environnement, un nouvel outil est développé. Cette base de données interactive et prévisionnelle, intégrant données spatiales et temporelles est expérimentée sur les f...

  7. Viejas, nuevas y novísimas guerras: la conflictividad desafía la modernidad

    Directory of Open Access Journals (Sweden)

    José Manuel Pureza

    2012-02-01

    Full Text Available La comparación entre los sistemas políticos, objetivos de guerra, tipo de ejército, técnica militar y economía de guerra de las llamadas viejas guerras y de las nuevas guerras nos revela un continuum y una articulación de las causas de la violencia y de las guerras, que, a su vez, tienen manifestaciones cada vez más locales (a pesar de sus impactos globales. Y subraya también la necesidad de repensar categorías y adaptar conceptos. De hecho, los contextos de paz formal (y violenta en que emergían las viejas guerras interestatales se transformaron, después del final de la Guerra Fría, en escenarios de un nuevo tipo de conflictividad violenta, a los que se ha llamado «nuevas guerras». Sin embargo, los abordajes tradicionales sobre esas «viejas guerras» invisibilizaron las señales de emergencia de los nuevos tipos de conflictividad, ya que éstos no correspondían a ninguna definición tradicional de guerra. Las características de estas (nuevas manifestaciones de la violencia han ido desafiando las fronteras entre lo que se define como guerra y lo que se define como paz. Sin embargo, los conceptos o definiciones de conflicto y de guerra no son inmutables y estáticos, son conceptos dinámicos y deben tener capacidad de adaptación a las nuevas realidades. Nuestra propuesta es precisamente que hoy día, hay espacios de indefinición o «sin nombre», normalmente entendidos como contextos de paz formal, pero que pueden contener indicios del surgimiento de nuevísimos tipos de conflictividad, cuestionando y poniendo en duda las distinciones estanques y herméticas entre escenarios de paz formal, guerra y posguerra. Comparing the political systems, war objectives, type of army, military technique and war economics of the so-called new wars reveals a continuum and a connection of the causes for violence and wars which, in turn, present increasingly local signs (in spite of their global impact. It also stresses the need

  8. La imagen de los destinos turísticos cubanos. Un acercamiento desde La Habana Vieja

    Directory of Open Access Journals (Sweden)

    Msc. Lidié Perera Conde

    2012-11-01

    Full Text Available El estudio y análisis de la imagen de los destinos turísticos, a partir de las expectativas del cliente y desde la perspectiva de las entidades comercializadoras de los mismos, constituye todo un reto teniendo en cuenta que la decisión de viajar está también condicionada por un cúmulo de información que puede no ser correspondida con la realidad que se constata en el lugar de destino y los medios de comunicación. El informe que se presenta es resultado de investigaciones cuyo objetivo es conocer y analizar esas expectativas para el caso cubano, así como el análisis de la imagen inducida desde la perspectiva de las entidades comercializadoras, tomando como referente La Habana Vieja, principal destino de ciudad de Cuba. Los resultados obtenidos permitieron reconocer los íconos culturales que identifican a la ciudad y el papel que los mismos juegan en los diferentes soportes comunicacionales, proporcionándoles a las entidades gestoras de la actividad turística el punto de vista adecuado para la futura toma de decisiones en el ámbito de la imagen.

  9. Amphibians and reptiles of C. E. Miller Ranch and the Sierra Vieja, Chihuahuan Desert, Texas, USA

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    Drew R. Davis

    2018-02-01

    Full Text Available We report the occurrence of 50 species of amphibians and reptiles recently collected on C. E. Miller Ranch and the Sierra Vieja in the Chihuahuan Desert of Texas, USA and describe their perceived distribution and abundance across various habitat associations of the region. Our recent surveys follow intense, historic sampling of amphibians and reptiles from this region in 1948. Of the 50 species detected in recent surveys, six were not collected in 1948 and an additional three species documented in 1948 have yet to be detected in a 14-year period of recent surveys. Combining data from both historic and recent surveys, a total of 53 species of amphibians and reptiles are known from the ranch (11 amphibians, 42 reptiles. Land stewardship and conservation practices have likely contributed to the persistence of the majority of these species through time. Additionally, we discuss the status of amphibians and reptiles not collected during recent surveys and comment on potential species that have not yet been detected.

  10. Prediction des vibrations eoliennes d'un systeme conducteur-amortisseur avec une methode temporelle non lineaire

    Science.gov (United States)

    Langlois, Sebastien

    Les vibrations eoliennes sont la cause principale de bris de conducteurs en fatigue des lignes aeriennes de transport d'energie electrique. Ces vibrations sont dues a des detachements tourbillonnaires produits dans le sillage du conducteur. Une methode commune de reduction des vibrations est l'ajout d'amortisseurs de vibrations pres des pinces de suspension. Contrairement aux essais en ligne experimentale, la modelisation numerique permet d'evaluer rapidement et a faible cout la performance d'un amortisseur de vibration sur une portee de ligne aerienne. La technologie la plus frequemment utilisee fait appel au principe de balance d'energie (PBE) en evaluant le niveau de vibrations pour lequel la puissance injectee par le vent est egale a la puissance dissipee par le conducteur et l'amortisseur. Les methodes actuelles pour la prediction des vibrations reposent sur des hypotheses simplificatrices quant a la modelisation de l'interaction conducteur-amortisseur. Une approche prometteuse pour la prediction des vibrations est l'utilisation d'un modele numerique temporel non lineaire qui permet de mieux representer la masse, la geometrie, la rigidite et l'amortissement du systeme. L'objectif principal de ce projet de recherche est de developper un modele numerique avec integration temporelle directe d'un conducteur et d'un amortisseur en vibration permettant de reproduire le comportement dynamique du systeme pour la gamme de frequence et d'amplitude typique des vibrations eoliennes des conducteurs. Un modele par elements finis d'un conducteur seul en vibration resolu par integration temporelle directe a d'abord ete developpe en considerant une rigidite de flexion variable. Comme une rigidite de flexion constante et egale a 50% de la rigidite de flexion maximale theorique ( EImax) est jugee adequate pour la modelisation du conducteur, c'est cette valeur qui a ete utilisee pour la suite du projet. Ensuite, des modeles non-lineaires pour deux types d'amortisseur de

  11. El Juicio Final de la Capilla de San Martín en la Catedral Vieja de Salamanca

    OpenAIRE

    Rojas Bustamante, Juan Pablo

    2017-01-01

    [ES]Se estudian las pinturas murales del lienzo norte de la Capilla de San Martín en la Catedral Vieja de Salamanca, que se corresponden con un Juicio Final en donde convergen por lo menos cuatro niveles iconográficos. La complejidad del contenido con rémoras bizantinas e italianas permite múltiples lecturas y posibilidades de enfoque para reconstruir el contexto original de la obra. Se estructura a modo de tapiz pintado en uno de los espacios más enigmáticos de la seo salmantina. Las relacio...

  12. CREACIÓN, DISOLUCIÓN Y PARCELACIÓN DEL SEÑORÍO ALFONSINO DE DAYA VIEJA

    Directory of Open Access Journals (Sweden)

    Antonio Gil Olcina

    1989-01-01

    Full Text Available El fuero denominado alfonsino fue restablecido, el año 1772, por el gobierno de Carlos III como instrumento de colonización y reforma agraria en el reino de Valencia. Daya Vieja, humedal bonificado en el Bajo Segur a, antigua dehesa vinculada, adquirió condición de lugar alfonsino en 1791, vísperas ya de la disolu ción del régimen señorial. Al producirse ésta, su forma de explotación, es decir, el arrendamiento a corto plazo, permitió la pervivencia total y absoluta del elemento territorial y su inscripción, sin dificultad ni limitación alguna, en el registro de la propiedad. Transmitida monolíticamente por su cesión hereditaria, la haci enda, que ocupaba íntegro el municipio de Daya Vieja y desbordaba sobre el de Sa n Fulgencio, no se parceló, tras su enajenación global por el duque de Pinohermoso, hasta el segundo cuarto de este siglo.

  13. Una nueva especie de Euglena (Euglenozoa: Euglenales aislada de ambientes extremófilos en las Pailas de Barro del Volcán Rincón de la Vieja, Costa Rica

    Directory of Open Access Journals (Sweden)

    Ana Sittenfeld

    2004-03-01

    Full Text Available Se describe una nueva especie de euglena aislada de las Pailas de Barro Caliente del Volcán Rincón de la Vieja, Costa Rica. Esta especie se caracteriza por habitar sitios ácidos y calientes. Euglena pailasensis sp. nov. tiene como características principales: la ausencia de flagelos, presencia de filamentos similares a "pilis", presencia de cloroplastos con pirenoides atravesados por varios tilacoides, además, es termotolerante y acido-tolerante. Los análisis filogenéticos para el gen ADNr 18S y la secuencia del gen para la enzima Gap C indican que la nueva especie está relacionada con E. mutabilis. Las características taxonómicas basadas en la morfología, biología y secuencia del ADNr 18S y los genes GAP C, son discutidas y comparadas con otras especies relativamente cercanas al géneroAnew species of euglena isolated from a hot and acid mud pool located in Las Pailas de Barro, Volcán Rincón de la Vieja, Costa Rica is described. This species inhabits hot and acid environments. Euglena pailasensis sp. nov. main features are: the absence of flagella, the presence filaments like "pilis", the presence of chloroplasts with pyrenoids crossed by several tylakoids, and acid and heat tolerance. Molecular phylogeny studies using 18S rDNA and Gap C genes indicated that the new species is related to E mutabilis. Its taxonomic characters based on morphology, biology and sequence of the 18S rDNA and Gap C genes are discussed and compared with other closely related species of the genus

  14. De la vieja a la nueva extrema derecha (pasando por la fascinación por el fascismo

    Directory of Open Access Journals (Sweden)

    José Luis Rodríguez Jiménez

    2009-12-01

    Full Text Available Análisis de la evolución de las corrientes de extrema derecha, de su discurso, programa y estrategia, y de su relación con la derecha conservadora y el fascismo. El tradicionalismo fue una extrema derecha de resistencia en el XIX, incapaz de frenar el avance del liberalismo. Esta situación, la progresión del movimiento obrero y la crisis cultural coincidiendo con el cambio de siglo alentaron la renovación de la extrema derecha. El siglo XX fue testigo de la aparición de tres corrientes de pensamiento que renovaron su programa (derecha autoritaria, derecha radical y fascismo y disfrutaron de parcelas de poder político en la convulsa Europa de 1918-1945. La irrupción del fascismo y el éxito obtenido en un terreno en el que había fracasado la derecha no democrática, el de neutralizar a la izquierda obrera y hacerse con el poder para establecer una dictadura permanente, sedujo a amplios sectores de la derecha. El resultado fue una alianza con los fascismos responsables de la guerra mundial y el genocidio de millones de personas. Esa herencia y el mundo bipolar de la Guerra Fría representaron un lastre para su desarrollo. Se incide en la aparición de una nueva extrema derecha a mediados de los ochenta, en sus diferencias y semejanzas respecto a la vieja extrema derecha y el fascismo. Asimismo, en los factores que han podido incidir en la reaparición y consolidación de este tipo de organizaciones.________________ABSTRACT:Analysis of the evolution of the extreme right wing' thinking trends, its speech, program and strategy, and its relation with the conservative right faction and the fascism. The traditionalism was an extreme right of resistance during the XIX century. Unable to stop the advance of liberalism. This situation, the advancing of the labour movement and the cultural crisis agreeing with the change of the century encouraged the renovation of the extreme right movement. The  XX Century was witness of the appearance of three

  15. ONTOGENY OF THE DIET IN ANURANS (AMPHIBIA COLLECTED AT LA VIEJA RIVER BASIN IN THE DEPARMENTO OF QUINDIO (COLOMBIA

    Directory of Open Access Journals (Sweden)

    SERGIO ENRIQUE MORENO-BARBOSA

    2014-12-01

    Full Text Available The diet of three anuran species, Rhinella marina (Bufonidae, Pristimantis achatinus (Strabomantidae and Dendropsophus columbianus (Hylidae, that inhabit agroecosystems at the Rio La Vieja Basin (Quindio, Colombia was examined. The goal of this study was to establish if there is an ontogenetic change in the diet of all species. Gastrointestinal contents were preserved in 70% ethanol and identified to the lowest possible taxonomic level. Identified prey portions were classified into 20 types. Hymenoptera, Coleoptera and Hemiptera were the most frequent preys. Considerable dietary overlap among three different body-size classes of all species show some differences. However the ANOVA analysis showed that there was no significant difference (P=0.05 in diets at different ontogenetic sizes.

  16. Extraction de relations spatio-temporelles à partir des données environnementales et de la santé

    OpenAIRE

    Alatrista-Salas, Hugo

    2013-01-01

    Thanks to the new technologies (smartphones, sensors, etc.), large amounts of spatiotemporal data are now available. The associated database can be called spatiotemporal databases because each row is described by a spatial information (e.g. a city, a neighborhood, a river, etc.) and temporal information (e.g. the date of an event). This huge data is often complex and heterogeneous and generates new needs in knowledge extraction methods to deal with these constraints (e.g. follow phenomena in ...

  17. Mythical imaginary in rural agricultural practices on properties of La Vieja river basin, Colombia Imaginarios míticos en las prácticas agropecuarias rurales en fincas de la cuenca del rio La Vieja, Colombia

    Directory of Open Access Journals (Sweden)

    Sebastián Ramírez Arias

    2010-01-01

    Full Text Available This work analyzes the mythological belief or superstitions associated with farming and conservation activities in nine rural productive units on the river basin La Vieja, Colombia. The elderly people recognize the influence of multiple stories over productive and environmental conditions that are an important part of success or fail on their rural activities. The beliefs were classified by their functionality and the activities they regulate. 14 myths that have any on the influence activities of cultivate, breeding, conservation and social regulation were described. The main element for discussion was the functionality, considering its relationship the distribution and application in the subsystems of productions in the farms with the age, the gender and the hierarchy position on the family structure. It was conclude that the flow of information between expert systems and systems of popular knowledge helps to construct an adapted system. An example is the use, in cattle farms, of different moon phases during the artificial insemination to ensure the pregnancy and sex of the breed.Este trabajo analiza las creencias mitológicas, agüeros o supersticiones asociadas con las actividades agropecuarias y de conservación en nueve unidades productivas rurales de la cuenca media del río La Vieja, Colombia. Plantea que las gentes de antaño reconocen la influencia de múltiples relatos sobre condiciones productivas y ambientales que redundan en el éxito o el fracaso de las actividades rurales. Las creencias se clasificaron según su funcionalidad y las actividades que regulan. Se describieron así 14 mitos que influyen en las actividades de cultivo, cría, conservación y regulación social. El principal elemento de discusión fue la funcionalidad, considerando la distribución y aplicación en los subsistemas de producción en la finca, la relación con la edad y el género y con la posición jerárquica en la estructura familiar. El flujo de

  18. Conocimientos sobre implantes dentales en estomatólogos de los municipios de Centro Habana, Habana del Este y Habana Vieja Knowledge level on dental implants in stomatologists from Centro Habana, Habana del Este and Habana Vieja municipalities

    Directory of Open Access Journals (Sweden)

    Eneida García López

    2010-06-01

    Full Text Available Se realizó una investigación descriptiva transversal, con el objetivo de evaluar el nivel de conocimiento sobre implantes dentales de los estomatólogos generales básico e integrales de los municipios, Habana del Este, Centro Habana y Habana Vieja. El Ministerio de Salud Pública tiene especial interés en la implementación y generalización de las técnicas de implantología dental a nivel de los municipios por lo que esta temática se convierte en tema de necesario dominio para los estomatólogos, pues necesitan orientar, tratar y remitir a sus pacientes. Para medir los conocimientos fue aplicada una encuesta que constaba de diez preguntas, y se utilizó los criterios de conocen y desconocen, para evaluar las respuestas según su calidad. El nivel de conocimientos se clasificó en adecuado cuando la encuesta tuvo un 70 % o más de respuestas con el criterio de conocen. El nivel de conocimientos fue no adecuado para los grupos de estudios y para los municipios.A cross-sectional and descriptive research was carried out to assess the knowledge level on dental implants of Basic and Integral General Stomatologists from Habana del Este, Centro Habana and Habana Vieja municipalities and due to its spreading in the different media and the interest of our Public Health Ministry in application of this technique at municipality level it becomes necessary domain of stomatologists because of they need to guide, to treat and to refer the patients. To knowledge measurement we applied a survey including ten questions using to know and not to know criteria to assess the answers according to its quality. The knowledge level was classified as suitable when there was a 70 % or more of answers with the criterion of to know, but this knowledge level was not suitable for study groups and for the municipalities.

  19. La vivienda en La Habana Vieja. Desarrollo histórico, problemática actual y programas en curso

    Directory of Open Access Journals (Sweden)

    Menéndez García, Madeline

    2004-12-01

    Full Text Available The domestic architecture of Old Havana, a key aspect of its urban image, presents a variety of problems fundamentally associated with typological characteristics of the traditional house with courtyard and its development over more than four centuries of history. In spite of housing problems in the city as a whole and the fact that the oldest central areas are overcrowded and in a state of deterioration, Old Havana retains high heritage values, provided principally by its architecture, its urban ambience and its vitality. The comprehensiveness of the restoration program in the Historic Center which has been made possible by a new administration model, has led to the incorporation of diverse programs focusing on housing. These form part of an attempt to meet the challenge of preserving the residential nature of the area while at the same time providing decent and comfortable housing.La arquitectura doméstica de la Habana Vieja, protagonista principal de su imagen urbana, presenta un variado repertorio asociado, de manera fundamental, a las características tipológicas de la tradicional casa patio, en su tránsito por más de cuatro siglos de historia. A pesar de los problemas habitacionales que acumula la Ciudad en su conjunto y que en las más antiguas áreas centrales se traducen en sobreocupación y deterioro, La Habana Vieja conserva los altos valores patrimoniales que le han sido reconocidos, proporcionados principalmente por su arquitectura, sus ambientes urbanos y su vitalidad. El carácter integral que persigue el programa de rehabilitación del Centro Histórico y que logra materializarse gracias a su novedoso modelo de gestión, ha posibilitado la incorporación de diversos programas de atención a la vivienda. Con ellos se intenta enfrentar el reto que implica conservar el carácter residencial del conjunto recuperando, al mismo tiempo, la vivienda digna y confortable aspirada.

  20. VIEJAS Y NUEVAS REALIDADES URBANAS. IDENTIFICACIÓN DE ZONAS DE HABITALIDAD DESFAVORECIDA EN LA CIUDAD DE GRANADA

    Directory of Open Access Journals (Sweden)

    Carmen Egea Jiménez

    2009-01-01

    Full Text Available El presente trabajo toma como unidad de análisis el espacio urbano de la ciudad de Granada con objeto de estudiar las zonas más desfavorecidas por sus condiciones de habitabilidad en un momento de fuerte remodelación y crecimiento urbanístico, en el que la capital granadina se proyecta con una imagen de ciudad desarrollada, donde coexisten manifestaciones de desigualdad en cuanto a aspectos de habitabilidad de parte de la población. El fenómeno no es nuevo ni exclusivo de Granada, pero si un ejemplo de que las ciudades siguen siendo lugares donde las diferencias y las desigualdades son un rasgo consustancial a su configuración física y social. Son viejas realidades en contextos nuevos que invitan a preguntarse por los lugares donde perviven condiciones de habitabilidad menos «amables». Así, el presente trabajo pretende dar respuesta a este planteamiento teniendo en cuenta que existe una relación entre espacios urbanos deteriorados y población desfavorecida, con el riesgo de convertirse en grupos vulnerables si los actuales modelos de desarrollo no tienen en cuenta estas diferencias y desigualdades.

  1. Caractérisation spectrale et temporelle de l'émission X issue de l'interaction laser-agrégats

    Science.gov (United States)

    Bonté, C.; Fourment, C.; Harmand, M.; Jouin, H.; Micheau, S.; Peyrusse, O.; Pons, B.; Santos, J. J.

    2006-12-01

    Les agrégats de gaz rares constituent un état de la matière intermédiaire entre les cibles solides massives et les atomes en phase gazeuse. Il a été démontré que les agrégats irradiés sont sources d'ions, d'électrons, de neutrons ainsi que de rayonnement allant du visible aux X durs. Cette source peut-être produite avec un taux de répétition élevé et a l'avantage de ne pas produire de débris, dommageables pour les optiques notamment, et de présenter une très forte conversion de l'énergie laser incidente. Nous nous intéressons au rayonnement X particulièrement, en le caractérisant en intensité, spectre et durée, comme préalable à toute application de cette source X et comme moyen privilégié d'étude de la physique des plasmas nanométriques chauds et denses. En collaboration avec l'INRS-Énergie (Varenne, Qc, Canada), nous avons mis en œuvre une caméra à balayage de fente dont la résolution temporelle est de 800 fs rms. En focalisant des impulsions laser courtes (30 fs 5 ps) et intenses (jusqu'à 1017 W/cm2) sur des agrégats d'argon dont le rayon varie de 15 à 30 nm, nous avons démontré que l'émission X dont l'énergie est supérieure à 2 keV est plus courte que 2 ps, limité par la résolution temporelle. En couplant la caméra à un cristal tronconique, dont la conception a été réalisée au LULI (Palaiseau, France), nous nous sommes intéressés au rayonnement de couche K dans la gamme 2,9 - 3,2 keV. Nous avons démontré que ce rayonnement a une durée inférieure à 3 ps (limite de la résolution temporelle), et que les raies étaient émises avec un écart relatif inférieur à 1 ps. Une simulation basée sur le modèle nano-plasma proposé par T. Ditmire et sur le code collisionnel-radiatif Transpec a été développée au CELIA. Les spectres X résolus en temps calculés reproduisent à la fois la brièveté d'émission du rayonnement X et les états de charge élevés observés.

  2. Descripción ultraestructural de Euglena pailasensis (Euglenozoa) del Volcán Rincón de la Vieja, Guanacaste, Costa Rica

    OpenAIRE

    Sánchez, Ethel; Vargas, Maribelle; Mora, Marielos; Ortega, José María; Serrano, Aurelio; Freer, Enrique; Sittenfeld, Ana

    2014-01-01

    Los euglenoides son eucariotas unicelulares flagelados que habitan ambientes acuáticos y suelos de una gran diversidad de ecosistemas. Este trabajo presenta la descripción morfológica ultraestructural del euglenoide E. pailasensis aislado de las fuentes de lodo caliente de las “pailas de barro” en el Volcán Rincón de la Vieja, Guanacaste, Costa Rica. La temperatura de estos sitios puede variar entre 38 y 98° C y puede tener un pH entre 1 y 4. El estudio se realizó utilizando microscopia elect...

  3. Descripción ultraestructural de Euglena pailasensis (Euglenozoa) del Volcán Rincón de la Vieja, Guanacaste, Costa Rica

    OpenAIRE

    Ethel Sánchez; Maribel Vargas; Marielos Mora; José María Ortega; Aurelio Serrano; Enrique Freer; Ana Sittenfeld

    2004-01-01

    Los euglenoides son eucariotas unicelulares flagelados que habitan ambientes acuáticos y suelos de una gran diversidad de ecosistemas. Este trabajo presenta la descripción morfológica ultraestructural del euglenoide E. pailasensis aislado de las fuentes de lodo caliente de las "pailas de barro" en el Volcán Rincón de la Vieja, Guanacaste, Costa Rica. La temperatura de estos sitios puede variar entre 38 y 98° C y puede tener un pH entre 1 y 4. El estudio se realizó utilizando microscopia elect...

  4. [Agricultural land use impacts on aquatic macroinvertebrates in small streams from La Vieja river (Valle del Cauca, Colombia].

    Science.gov (United States)

    Giraldo, Lina Paola; Chará, Julián; Zúñiga, Maria del Carmen; Chará-Serna, Ana Marcela; Pedraza, Gloria

    2014-04-01

    The expansion of the agricultural frontier in Colombia has exerted significant pressure on its aquatic ecosystems during the last few decades. In order to determine the impacts of different agricultural land uses on the biotic and abiotic characteristics of first and second order streams of La Vieja river watershed, we evaluated 21 streams located between 1,060 and 1,534 m asl in the municipalities of Alcalá, Ulloa, and Cartago (Valle del Cauca, Colombia). Seven streams were protected by native vegetation buffers, eight had influence of coffee and plantain crops, and six were influenced by cattle ranching. Habitat conditions, channel dimensions, water quality, and aquatic macroinvertebrates were studied in each stream. Streams draining cattle ranching areas had significantly higher dissolved solids, higher phosphorus, higher alkalinity, higher conductivity, and lower dissolved oxygen than those covered by cropland and forests. Coarse substrates and diversity of flow regimes were significantly higher in cropland and protected streams when compared to streams affected by cattle ranching, whereas the percent of silt and slow currents was significantly higher in the latter. A total of 26,777 macroinvertebrates belonging to 17 orders, 72 families and 95 genera were collected. The most abundant groups were Diptera 62.8%, (Chironomidae 49.6%, Ceratopogonidae 6.7%), Mollusca 18.8% (Hydrobiidae 7.2%, Sphaeriidae 9.6%) and Trichoptera 5.7% (Hydropsychidae 3.7%). The Ephemeroptera, Trichoptera, and Plecoptera orders, known for their low tolerance to habitat perturbation, had high abundance in cropland and forested streams, whereas Diptera and Mollusca were more abundant in those impacted by cattle ranching. Results indicate that streams draining forests and croplands have better physical and biological conditions than those draining pastures, and highlight the need to implement protective measures to restore the latter.

  5. [Ultrastructural description of Euglena pailasensis (Euglenozoa) from Rincón de la Vieja volcano, Guanacaste, Costa Rica].

    Science.gov (United States)

    Sánchez, Ethel; Vargas, Maribel; Mora, Marielos; Ortega, José Maria; Serrano, Aurelio; Freer, Enrique; Sittenfeld, Ana

    2004-03-01

    The euglenoids are unicellular eukaryotic flagellates living in a diversity of soils and aquatic environments and ecosystems. This study describes the ultrastructure of an euglenoid isolated from the surface of a boiling mud pool with temperatures ranging from 38 to 98 degrees C and pH 2 - 4. The hot mud pool is located in Area de Pailas de Barro, Las Pailas, Rincón de la Vieja Volcano, Guanacaste, Costa Rica. The morphological characterization of the Euglena pailasensis was performed by SEM and TEM. It was determined that, although the euglenoid was obtained from an extreme volcanic environment, the general morphology corresponds to that of a typical member of Euglena of 30-45 microm long and 8-10 microm wide, with membrane, pellicle, chloroplasts, mitochondria, nucleus, pigments and other cytoplasmic organelles. E. pailasensis is delimited by a membrane and by 40 to 90 pellicle strips. It was observed up to 5 elongated chloroplasts per cell. The chloroplast contains several osmiophilic globules and a pyrenoid penetrated by few thylakoid pairs. The nutritious material is reserved in numerous small paramylon grains located at the center of the cell, mitocondria are characterized by the presence of crests in radial disposition toward the interior of the lumen. It was also observed around the external surface "pili" like filaments originating from the pellicle strips. There is no evidence for the presence of flagella in the ampulla (reservoir/canal area), a fact confirmed by negative staining, and a difference regarding other species of Euglena. The observed ultrastructural characteristics are not sufficient to explain the adaptation of this species to acid and hot environments.

  6. Retardo en el neurodesarrollo en niños de la Habana Vieja Retardation in the neurodevelopment of children in Old Havana

    Directory of Open Access Journals (Sweden)

    Roberto Moreno Mora

    2008-09-01

    Full Text Available OBJETIVO: evaluar un programa dirigido a los niños con retardo del neurodesarrollo. MÉTODOS: estudio retrospectivo analítico de casos y controles, de la consulta de neurodesarrollo de La Habana Vieja. El universo y muestra estuvo constituido por 170 pacientes con retardo del neurodesarrollo entre los años 2000 y 2006. Se seleccionó aleatoriamente un grupo estudio constituido por 52 niños bajo peso con retraso del desarrollo sicomotor, y un grupo control formado por 118 niños normopesos con retraso del desarrollo sicomotor. Fueron evaluados por un equipo interdisciplinario, y se les realizó seguimiento trimestral, aplicándoles estimulación integral, fisiátrica, sicomotora, logopédica y en el hogar. Se aplicaron programas de estimulación como Isidoro Candell, Bobath y Vojta. RESULTADOS: el grupo estudio presentó el menor por ciento de nivel escolar medio superior (42,31 % y el mayor por ciento de lactancia materna no exclusiva (20,08 %. Además, presentó hipertonía (10,91 %, trastornos de conducta (10,91 % y epilepsia-Down (3,64 %. La evaluación motora presentó en el grupo estudio en la categoría normal, un ascenso a un 59 %. El grupo estudio presentó el mayor por ciento de evolución agravada (12 % y el grupo control presentó un mayor por ciento de evolución favorable (39 %. CONCLUSIONES: la esfera motora presentó una respuesta más positiva que la esfera mental, y la evolución agravada se relacionó con los niños bajo peso con retardo del desarrollo sicomotor, aunque en general la evolución de los niños estimulados en nuestro programa presentó tendencia a la evolución favorable y superada.OBJECTIVE: to evaluate a program directed to children with neurodevelopment retardation. METHODS: a retrospective analytical case-control study was conducted at the neurodevelopment department of Old Havana. The universe and the sample were composed of 170 patients with neurodevelopment retardation from 2000 to 2006. A study group

  7. Physical and biogeochemical forcing of oxygen and nitrate changes during El Niño/El Viejo and La Niña/La Vieja upper-ocean phases in the tropical eastern South Pacific along 86° W

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    P. J. Llanillo

    2013-10-01

    Full Text Available Temporal changes in the water mass distribution and biogeochemical signals in the tropical eastern South Pacific are investigated with the help of an extended optimum multi-parameter (OMP analysis, a technique for inverse modeling of mixing and biogeochemical processes through a multidimensional least-square fit. Two ship occupations of a meridional section along 85°50' W from 14° S to 1° N are analysed during relatively warm (El Niño/El Viejo, March 1993 and cold (La Niña/La Vieja, February 2009 upper-ocean phases. The largest El Niño–Southern Oscillation (ENSO impact was found in the water properties and water mass distribution in the upper 200 m north of 10° S. ENSO promotes the vertical motion of the oxygen minimum zone (OMZ associated with the hypoxic equatorial subsurface water (ESSW. During a cold phase the core of the ESSW is found at shallower layers, replacing shallow (top 200 m subtropical surface water (STW. The heave of isopycnals due to ENSO partially explains the intrusion of oxygen-rich and nutrient-poor antarctic intermediate water (AAIW into the depth range of 150–500 m. The other cause of the AAIW increase at shallower depths is that this water mass flowed along shallower isopycnals in 2009. The shift in the vertical location of AAIW reaching the OMZ induces changes in the amount of oxygen advected and respired inside the OMZ: the larger the oxygen supply, the greater the respiration and the lower the nitrate loss through denitrification. Variations in the intensity of the zonal currents in the equatorial current system, which ventilates the OMZ from the west, are used to explain the patchy latitudinal changes of seawater properties observed along the repeated section. Significant changes reach down to 800 m, suggesting that decadal variability (Pacific decadal oscillation is also a potential driver in the observed variability.

  8. Campo, campesinos y cuestión rural en Castilla la Vieja y en el Reino de León durante la Edad Moderna. Estado de la cuestión, claves y valoraciones de conjunto

    Directory of Open Access Journals (Sweden)

    Laureano M. RUBIO PÉREZ

    2009-10-01

    Full Text Available RESUMEN: Sobre la base del amplio marco espacial adscrito a los territorios de Castilla la Vieja y del Reino de León y de los condicionantes estructurales que lo defi nen e identifi can, se plantea la problemática del mundo rural y de la sociedad campesina durante la Edad Moderna a partir de los conocimientos aportados hasta el momento por la historiografía rural. En torno a esta problemática y desde la valoración de los diferentes modelos agrarios, que exigen no pocas revisiones y cuestionamientos a la supuesta homogeneidad territorial y social, se plantean algunas de las principales cuestiones que afectan al desarrollo de la sociedad campesina, especialmente aquellos que tienen que ver tanto con el sistema productivo y los regímenes agrarios, como con la estructura social y las relaciones de producción a través del marco jurídico del régimen señorial, sin olvidar la impronta de los condicionantes político-administrativos que de alguna forma justifi can el fortalecimiento o debilidad de la comunidad rural.ABSTRACT: Over the base of the broad spatial framework attached to the territories of old Castile and the Kingdom of Leon and over the structural factors that defi ne and identify it, it’s raise the problematic of the rural world and peasant society during the Early Modern Period from the knowledges gave until now by the rural bibliographers. Related to this problem, and from different points of view, lots of questions arise involving the peasant society development, specially in the productive and agricultural systems, social structure and production facts in the lordship system, without forgetting the political conditioners which justifying the strengthening or weakness of the rural community.

  9. PATRONES DE LA COMPOSICIÓN DE AVES ACUÁTICAS EN EL RÍO LA VIEJA, VALLE GEOGRÁFICO DEL RÍO CAUCA, COLOMBIA

    Directory of Open Access Journals (Sweden)

    LAURA MILENA RAMÍREZ-URREA

    2014-01-01

    Full Text Available Compilamos y analizamos los datos de observaciones realizadas entre los años 2001 y 2013 en tres sectores a lo largo del cauce del río La Vieja, ubicado en el valle geográfico del río Cauca, Colombia. Describimos los datos espacial y temporalmente, enfocándonos en identificar patrones de composición y abundancia de especies. Registramos 28 especies de aves acuáticas en 33 transectos, siendo 22 especies observadas en más del 50 % de los transectos. Las diferencias en el número de especies por transecto no fueron significativas entre los tres sectores del río. Sin embargo, dos análisis de agrupamiento, considerando tanto los datos de presencia/ausencia como de abundancia, indicaron que la composición de especies presenta estructura espacial a lo largo del río. En contraste, aunque las observaciones se realizaron durante más de diez años no se encontró evidencia de cambios temporales en la composición de especies. No obstante, algunas especies mostraron tendencias de aumento o disminución en su frecuencia. Presentamos el nuevo registro de una especie (Chloroceryle aenea para la región. A pesar de que el paisaje asociado al río La Vieja ha sufrido un gran impacto antropogénico, aún conserva una diversidad significativa de aves acuáticas que pueden servir para aportar valor a los planes de conservación en la zona.

  10. Le télétravail, une réponse à la demande de mobilités spatio-temporelle dans la gestion du quotidien des populations actives et de leurs familles

    Directory of Open Access Journals (Sweden)

    Laurence Thomsin

    2003-06-01

    Full Text Available Une des principales caractéristiques de la Société de l’Information contemporaine est la disparition, sous l’action des NTIC, de certaines frontières entre les personnes, les lieux, leurs rôles et leurs activités (Béréziat et al., 2000 ; Kreitzman, 1999. Cela ne concerne pas uniquement la sphère professionnelle mais également la sphère privée : changement des relations entre collègues de travail, entre les lieux de télétravail et les autres endroits, et, enfin, au sein de la sphère domestique entre l’espace privatif et l’espace de travail. Dans cette situation, les individus ont besoin de recréer de nouveaux équilibres. Les télétravailleurs en particulier se doivent d’être inventifs, car en la matière il n’y a aucun précédent auquel ils pourraient se référer. Pour aborder la question des conséquences spatio-temporelles d’une pratique quotidienne individuelle de ce mode d’organisation du travail, nous avons mené une étude quantitative et qualitative auprès de la population télétravailleuse d’une multinationale. Ces observations au sein d’un observatoire topique nous ont permis d’identifier d’une part, pratiques et formes de télétravail et d’autre part, diversité de profils de télétravailleurs. Pour chacun de ces profils, l’étude a permis de mettre en évidence le réaménagement de la mobilité quotidienne dans ses dimensions professionnelles et non professionnelles.One of the main characteristics of the contemporary Information Society is the disappearance, due to NICTs, of hundreds of borders between persons, places, their roles and activities. This not only concerns the professional sphere, but the private sphere as well: changes in relations between work colleagues, telework places and other places, and finally, within the domestic sphere - between private space and work space. In this situation individuals have to recreate new equilibria. Teleworkers, in particular, have to

  11. ESPACIOS TURÍSTICOS, ORDENACIÓN DEL TERRITORIO Y ACTITUDES POLÍTICAS, EL CASO DEL COMPLEJO HOTELERO CERCA VIEJA EN FUENCALIENTE DE LA PALMA (ISLAS CANARIAS. ESPAÑA

    Directory of Open Access Journals (Sweden)

    Carlos Santiago Martín Fernández

    2011-01-01

    Full Text Available El presente artículo describe los nexos o relaciones existentes entre tres aspectos de gran actualidad: el desarrollo inmobiliario-turístico, la ordenación del territorio y las estrategias políticas. Para ello, estudiamos un caso emblemático en Canarias: el proceso de construcción del Resort Cerca Vieja en Fuencaliente, isla de La Palma.

  12. Tradition et distance temporelle : « de la justesse de la compréhension » chez Hans-Georg Gadamer

    Directory of Open Access Journals (Sweden)

    Paul Marinescu

    2012-12-01

    Full Text Available In this paper, I will discuss Gadamer’s attempt to reach to a deeper dimension of truth, situated beneath the scientific objectivity and independent from methodological criteria. If the truth finds its core in tradition, as Gadamer’s philosophical hermeneutics says it, and there is no objectivity other than the confirmation given by the historical prejudices, how is it still possible to consider the problem of the correctness of the understanding? Can we assign a critical function to the temporal distance and identify tradition as a source of truth and meaning, as Gadamer does in “Truth and Method”, and consider them viable solutions to this problem? The following paper tries to answer this question by discussing the temporal distance in its transcendental dimension for the hermeneutical experience and by emphasizing its relation to the tradition defined as an “in between” strangeness and familiarity.

  13. Conocimientos sobre implantes dentales en estomatólogos de los municipios de Centro Habana, Habana del Este y Habana Vieja

    Directory of Open Access Journals (Sweden)

    Eneida García López

    2010-06-01

    Full Text Available Se realizó una investigación descriptiva transversal, con el objetivo de evaluar el nivel de conocimiento sobre implantes dentales de los estomatólogos generales básico e integrales de los municipios, Habana del Este, Centro Habana y Habana Vieja. El Ministerio de Salud Pública tiene especial interés en la implementación y generalización de las técnicas de implantología dental a nivel de los municipios por lo que esta temática se convierte en tema de necesario dominio para los estomatólogos, pues necesitan orientar, tratar y remitir a sus pacientes. Para medir los conocimientos fue aplicada una encuesta que constaba de diez preguntas, y se utilizó los criterios de conocen y desconocen, para evaluar las respuestas según su calidad. El nivel de conocimientos se clasificó en adecuado cuando la encuesta tuvo un 70 % o más de respuestas con el criterio de conocen. El nivel de conocimientos fue no adecuado para los grupos de estudios y para los municipios.

  14. Peligro sísmico, exposición y vulnerabilidad de las Villas Vieja y Nueva de Trancas, Tucumán, Argentina

    Directory of Open Access Journals (Sweden)

    García Alicia Irene

    2010-10-01

    Full Text Available Las Villas Vieja y Nueva de Trancas, situadas en la cuenca tectónica de Tapia-Trancas, están emplazadas sobre la zona epicentral del terremoto que destruyó a la antigua villa en 1826. El objetivo es estudiar el riesgo sísmico que presentan las villas como sumatoria del peligro sísmico natural más la vulnerabilidad de su población frente a la ocurrencia potencial de otro sismo destructivo. Se recurrió al análisis bibliográfico documental, de estadísticas demográfico-económicas, de técnicas de relevamiento geográfico y análisis espacial. Los resultados indican que estas poblaciones presentan un alto grado de vulnerabilidad física, estructural-habitacional y socioeconómica frente al peligro sísmico al que están expuestas.

  15. Peligro sísmico, exposición y vulnerabilidad de las Villas Vieja y Nueva de Trancas, Tucumán, Argentina

    Directory of Open Access Journals (Sweden)

    Alicia Irene García

    2010-01-01

    Full Text Available Las Villas Vieja y Nueva de Trancas, situadas en la cuenca tectónica de Tapia-Trancas, están emplazadas sobre la zona epicentral del terremoto que destruyó a la antigua villa en 1826. El objetivo es estudiar el riesgo sísmico que presentan las villas como sumatoria del peligro sísmico natural más la vulnerabilidad de su población frente a la ocurrencia potencial de otro sismo destructivo. Se recurrió al análisis bibliográfico-documental, de estadísticas demográfico-económicas, de técnicas de relevamiento geográfico y análisis espacial. Los resultados indican que estas poblaciones presentan un alto grado de vulnerabilidad física, estructuralhabitacional y socioeconómica frente al peligro sísmico al que están expuestas.

  16. Intrication temporelle et communication quantique

    Science.gov (United States)

    Bussieres, Felix

    Quantum communication is the art of transferring a quantum state from one place to another and the study of tasks that can be accomplished with it. This thesis is devoted to the development of tools and tasks for quantum communication in a real-world setting. These were implemented using an underground optical fibre link deployed in an urban environment. The technological and theoretical innovations presented here broaden the range of applications of time-bin entanglement through new methods of manipulating time-bin qubits, a novel model for characterizing sources of photon pairs, new ways of testing non-locality and the design and the first implementation of a new loss-tolerant quantum coin-flipping protocol. Manipulating time-bin qubits. A single photon is an excellent vehicle in which a qubit, the fundamental unit of quantum information, can be encoded. In particular, the time-bin encoding of photonic qubits is well suited for optical fibre transmission. Before this thesis, the applications of quantum communication based on the time-bin encoding were limited due to the lack of methods to implement arbitrary operations and measurements. We have removed this restriction by proposing the first methods to realize arbitrary deterministic operations on time-bin qubits as well as single qubit measurements in an arbitrary basis. We applied these propositions to the specific case of optical measurement-based quantum computing and showed how to implement the feedforward operations, which are essential to this model. This therefore opens new possibilities for creating an optical quantum computer, but also for other quantum communication tasks. Characterizing sources of photon pairs. Experimental quantum communication requires the creation of single photons and entangled photons. These two ingredients can be obtained from a source of photon pairs based on non-linear spontaneous processes. Several tasks in quantum communication require a precise knowledge of the properties of the source being used. We developed and implemented a fast and simple method to characterize a source of photon pairs. This method is well suited for a realistic setting where experimental conditions, such as channel transmittance, may fluctuate, and for which the characterization of the source has to be done in real time. Testing the non-locality of time-bin entanglement. Entanglement is a resource needed for the realization of many important tasks in quantum communication. It also allows two physical systems to be correlated in a way that cannot be explained by classical physics; this manifestation of entanglement is called non-locality. We built a source of time-bin entangled photonic qubits and characterized it with the new methods implementing arbitrary single qubit measurements that we developed. This allowed us to reveal the non-local nature of our source of entanglement in ways that were never implemented before. It also opens the door to study previously untested features of non-locality using this source. Theses experiments were performed in a realistic setting where quantum (non-local) correlations were observed even after transmission of one of the entangled qubits over 12.4 km of an underground optical fibre. Flipping quantum coins. Quantum coin-flipping is a quantum cryptographic primitive proposed in 1984, that is when the very first steps of quantum communication were being taken, where two players alternate in sending classical and quantum information in order to generate a shared random bit. The use of quantum information is such that a potential cheater cannot force the outcome to his choice with certainty. Classically, however, one of the players can always deterministically choose the outcome. Unfortunately, the security of all previous quantum coin-flipping protocols is seriously compromised in the presence of losses on the transmission channel, thereby making this task impractical. We found a solution to this problem and obtained the first loss-tolerant quantum coin-flipping protocol whose security is independent of the amount of the losses. We have also experimentally demonstrated our loss-tolerant protocol using our source of time-bin entanglement combined with our arbitrary single qubit measurement methods. This experiment took place in a realistic setting where qubits travelled over an underground optical fibre link. This new task thus joins quantum key distribution as a practical application of quantum communication. Keywords. quantum communication, photonics, time-bin encoding, source of photon pairs, heralded single photon source, entanglement, non-locality, time-bin entanglement, hybrid entanglement, quantum network, quantum cryptography, quantum coin-flipping, measurement-based quantum computation, telecommunication, optical fibre, nonlinear optics.

  17. Variabilité des populations de salmonidés en eau courante : étude de la variance liée à différentes échelles spatiales ou temporelles et implications pour les modèles d'habitat

    Directory of Open Access Journals (Sweden)

    MILNER N. J.

    1995-04-01

    Au niveau inter cours d'eau (2 et à plus large échelle, la variance temporelle de l'abondance des O+ est beaucoup plus faible que pour les poissons > O+. Certains des facteurs influençant la variabilité aux différentes échelles géographiques sont discutés brièvement.

  18. Descripción ultraestructural de Euglena pailasensis (Euglenozoa del Volcán Rincón de la Vieja, Guanacaste, Costa Rica

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    Ethel Sánchez

    2004-03-01

    Full Text Available Los euglenoides son eucariotas unicelulares flagelados que habitan ambientes acuáticos y suelos de una gran diversidad de ecosistemas. Este trabajo presenta la descripción morfológica ultraestructural del euglenoide E. pailasensis aislado de las fuentes de lodo caliente de las "pailas de barro" en el Volcán Rincón de la Vieja, Guanacaste, Costa Rica. La temperatura de estos sitios puede variar entre 38 y 98° C y puede tener un pH entre 1 y 4. El estudio se realizó utilizando microscopia electrónica de barrido y transmisión. El euglenoide está constituido por una célula típica que puede medir de 30 a 45 µm de largo y 8-10 µm de ancho, con membrana externa, película, cloroplastos, mitocondrias, núcleo, pigmentos granulares y demás organelas citoplasmáticas de un eucarionte. Esta delimitado por una membrana continua y por una película compuesta de aproximadamente 40 - 90 mionemas que miden entre 0.8 y 1.0 µm de ancho, dispuestas helicoidalmente sobre la célula. Se observó 5 cloroplastos elongados por célula, de 1-2 µm de diámetro y 6-12 µm de largo, delimitados por tres membranas y localizados en la periferia celular. Este posee glóbulos osmiofílicos y un pirenoide penetrado por pocos tilacoides. El material nutritivo se almacena en gránulos de paramilón y las mitocondrias presentan las crestas en disposición radial hacia el interior del lumen. La zona de la ámpula se observó sin flagelo y se notó una red de fibrillas que envuelve el espécimen. Las características ultraestructurales observadas en este estudio, no permiten explicar la capacidad de E. pailasensis para habitar en el ambiente volcánico extremo de las Pailas de Barro CalienteThe euglenoids are unicellular eukaryotic flagellates living in a diversity of soils and aquatic environments and ecosystems. This study describes the ultrastructure of an euglenoid isolated from the surface of a boiling mud pool with temperatures ranging from 38 to 98°C and p

  19. Una nueva especie de Euglena (Euglenozoa: Euglenales) aislada de ambientes extremófilos en las Pailas de Barro del Volcán Rincón de la Vieja, Costa Rica

    OpenAIRE

    Sittenfeld, Ana; Vargas, Maribelle; Sánchez, Ethel; Mora, Marielos; Serrano, Aurelio

    2014-01-01

    Se describe una nueva especie de euglena aislada de las Pailas de Barro Caliente del Volcán Rincón de la Vieja, Costa Rica. Esta especie se caracteriza por habitar sitios ácidos y calientes. Euglena pailasensis sp. nov. tiene como características principales: la ausencia de flagelos, presencia de filamentos similares a “pilis”, presencia de cloroplastos con pirenoides atravesados por varios tilacoides, además, es termotolerante y acido-tolerante. Los análisis filogenéticos para el gen ADNr 18...

  20. Una nueva especie de Euglena (Euglenozoa: Euglenales) aislada de ambientes extremófilos en las Pailas de Barro del Volcán Rincón de la Vieja, Costa Rica

    OpenAIRE

    Ana Sittenfeld; Maribelle Vargas; Ethel Sánchez; Marielos Mora; Aurelio Serrano

    2004-01-01

    Se describe una nueva especie de euglena aislada de las Pailas de Barro Caliente del Volcán Rincón de la Vieja, Costa Rica. Esta especie se caracteriza por habitar sitios ácidos y calientes. Euglena pailasensis sp. nov. tiene como características principales: la ausencia de flagelos, presencia de filamentos similares a "pilis", presencia de cloroplastos con pirenoides atravesados por varios tilacoides, además, es termotolerante y acido-tolerante. Los análisis filogenéticos para el gen ADNr 18...

  1. Diseño de un plan estratégico para la "Vieja Casona Restaurant", ubicado en la Parroquia de Lloa, Cantón Quito, Provincia de pichincha.

    OpenAIRE

    Sotomayor Sotomayor, Jenny Paola

    2010-01-01

    The realization of this project aims to create a Estrategic plan to improve the management in the typical restaurant "the old house" thereby seeking to fill an unmet demand and provide quality service generating profitability for the company. La realización de este proyecto tiene como objeto crear un plan estratégico que mejore la gestión en el restaurant de comida típica “LA VIEJA CASONA” buscando con ello suplir una demanda insatisfecha y otorgar un servicio de calidad generando rentabil...

  2. Disponibilidad de recursos y tipos de sistemas de cultivo de café y plátano en la cuenca del río la Vieja, Colombia

    OpenAIRE

    Murillo López, Beatriz Elena

    2010-01-01

    En la cuenca del río La Vieja se estudió la asociación de actividades con la función y estructura de 10 fincas. La metodología uso métodos etnográficos (entrevista semidirigida, conversación informal y observación-participante). Evaluación de las actividades para determinar la forma, los modos de operar y criterios de los agricultores para abordar las etapas de producción y los problemas ambientales asociados con el control de enfermedades, plagas y arvenses. Se valoró la disponibilidad de ma...

  3. The Organization of Working Time: Developing an Understanding and Action Plan to Promote Workers' Health in a Seasonal Work Context: L'organisation temporelle du travail: la comprendre pour développer des actions favorisant la santé des travailleuses en contexte de travail saisonnier.

    Science.gov (United States)

    Major, Marie-Eve; Vézina, Nicole

    2017-11-01

    Despite the health problems associated with irregular schedules and long working hours, few studies have focused on the temporal dimension of work in seasonal working contexts. Through the monitoring of sixteen seasonal workers in the crab-processing industry over a two-year period, this study aimed to better understand their working reality and to provide a detailed picture of the temporal dimension of seasonal work as experienced by these workers. Observations of the work activity, interviews, and analysis of official documents were carried out. The findings reveal that the organization of working time and working conditions are very restrictive. These constraints are linked not only to the work environment and management but also to various public policies and ministerial directives. Methodological elements essential for the study of the organization of working time have been identified and could contribute to a better understanding of temporal constraints experienced by seasonal workers. Résumé Malgré les problèmes de santé associés aux horaires non standards et aux longues heures de travail, peu d'études se sont attardées à dégager un portrait de la dimension temporelle du travail en contexte de travail saisonnier. Par le suivi de 16 travailleuses saisonnières de l'industrie de la transformation du crabe pendant deux années, cette étude visait à mieux comprendre leur réalité de travail et à dresser un portrait détaillé de la dimension temporelle du travail saisonnier tel que vécu par ces travailleuses. Des observations du travail, des entretiens et l'analyse de documents ont été réalisés. Les résultats révèlent une organisation temporelle et des conditions de travail fort contraignantes pour ces travailleuses liées, entre autres, à l'environnement et à la gestion du travail, mais également à diverses politiques publiques et consignes ministérielles. Des éléments méthodologiques essentiels pour l'étude des temps de travail

  4. Sistema de información WEB para la administración del recurso hídrico superficial de la cuenca del río La Vieja, en Colombia

    Directory of Open Access Journals (Sweden)

    Jenny Carolina Ramírez-Leal

    2014-01-01

    Full Text Available Este trabajo presenta el desarrollo de una herramienta Web georreferenciada a través de la API de Google Maps, para administrar los recursos hídricos superficiales de la cuenca del río La Vieja en Colombia. Esto con el fin de crear un sistema de integración de información de fácil acceso, que ofrezca a las personas datos reales y actuales acerca del estado de los recursos hídricos en la cuenca del río La Vieja, para futuras consultas e investigaciones. Esta aplicación Web se llevó a cabo a través de la metodología ágil SCRUM y la metodología Mpiua, que integradas permitieron un desarrollo evolutivo e incremental, donde se involucró al usuario activamente al momento de incorporar aspectos de usabilidad y accesibilidad. Así mismo, se hizo uso de la arquitectura MVC para obtener un producto más escalable con abstracción de datos, código entendible, intercomunicación entre componentes y control de los recursos del servidor. Finalmente, se obtuvo la implementación de la herramienta Web HidroQuindío, que permite administrar la información de las estaciones de monitoreo, fuentes hídricas, entes territoriales, fuentes de captación y estructuras de conducción de apoyo a la toma de decisiones alrededor de la cuenca.

  5. Caractérisation spatio-temporelle du régime pluviométrique du haut bassin du fleuve Sénégal dans un contexte de variabilité climatique

    Directory of Open Access Journals (Sweden)

    Alain Dezetter

    2011-07-01

    Full Text Available Les écoulements et par conséquent les ressources en eau constituent la réponse des bassins versants aux impulsions pluviométriques. En Afrique de l'Ouest et Centrale, on assiste depuis les années 1970 à une sécheresse sans précédent, ainsi qu'à une grande variabilité spatiale et temporelle des pluies, caractéristique du domaine tropical. L'objectif de ce travail est de définir la variabilité spatio-temporelle des précipitations à l'échelle du haut-bassin du fleuve Sénégal à partir des données de dix stations de référence. Le choix des stations obéit à des critères de qualité des données (lacunes peu nombreuses et de proximité avec le bassin versant. Dans un premier temps, des tests statistiques d'homogénéité ont été appliqués aux séries de pluies annuelles de l'origine des stations à 2005. Les séries analysées présentent toutes des ruptures. Sur les dix stations étudiées, huit présentent une rupture comprise entre 1960 et 1970 et les déficits ultérieurs varient entre 12 et 24 %. À l'échelle mensuelle, après reconstitution des données manquantes, il apparaît que les précipitations ont diminué significativement pour presque tous les mois entre les deux périodes. À l'échelle journalière, l'analyse des fractions pluviométriques journalières met en évidence une tendance à la diminution du cumul annuel moyen des pluies supérieures à 40 mm (qui sont considérées comme les grosses pluies à partir des années de rupture. Nous avons ensuite caractérisé la variabilité spatiale des précipitations annuelles moyennes sur 30 et 10 ans, puis les écarts par rapport à la décennie de référence 1961-1970. Il apparaît ainsi que le sud du bassin présente les excédents les plus forts durant les périodes excédentaires, mais aussi les déficits les plus élevés en périodes déficitaires.Runoff and consequently water resources constitute the response of watersheds to pluviometric impulses

  6. De nuevo sobre la Compassio Mariae: A propósito de las pinturas murales del sepulcro de don Alfonso Vidal en la catedral vieja de Salamanca

    Directory of Open Access Journals (Sweden)

    Gutiérrez Baños, Fernando

    2002-03-01

    Full Text Available En el verano de 1999 quedaron al descubierto tras su restauración las pinturas murales de estilo gótico lineal de los siglos XIII y XIV que se encontraron en noviembre de 1997 en el brazo meridional del crucero de la catedral vieja de Salamanca. Por su cantidad, por su calidad y por la riqueza de su iconografía estos descubrimientos consolidan la importancia de Salamanca en el panorama de la pintura de estilo gótico lineal. No pretendo abordar en este momento un estudio de conjunto acerca de estas pinturas, que reservo para otra ocasión, sino estudiar un aspecto iconográfico relevante de estos descubrimientos que entronca con el objeto de interés de la profesora Domínguez Rodríguez en un artículo publicado no hace mucho tiempo en las páginas de esta revista.…

  7. “Désormais…” Essai sur les fonctions argumentatives d’un marqueur de rupture temporelle “Désormais…” A Study on the Argumentative Functions of a Marker of temporality

    Directory of Open Access Journals (Sweden)

    Francis Chateauraynaud

    2010-04-01

    Full Text Available L’analyse des débats contemporains suggère qu’une partie importante de l’activité discursive des acteurs est consacrée à un travail de cadrage, qui vise à construire discursivement le contexte d’interprétation des échanges d’arguments. Il s’agit notamment d’inscrire la confrontation dans une temporalité qui lui donne sens. On propose ici d’articuler la sociologie des controverses et l’analyse argumentative afin de rendre compte de la façon dont la trajectoire des acteurs et des arguments est traitée d’un point de vue temporel (ce qui est renvoyé définitivement vers le passé, ce qui est annoncé, ce qui est jugé improbable ou impossible et, symétriquement, comment au fil des débats et des controverses les manières d’argumenter et de modaliser le temps se transforment. Partant d’une occurrence de l’adverbe « désormais » dans le préambule de la Déclaration Universelle des Droits de l’Homme et du Citoyen de 1789, puis étendant notre analyse à d’autres dossiers (amiante, nucléaire, OGM, nanotechnologies, on montre comment une attention portée à une telle balise temporelle permet d’identifier les points de rupture construits comme pertinents par les acteurs de la controverse, attire l’attention sur la nature de l’attracteur temporel ainsi érigé (décision politique ou juridique, ��vénement dans le champ technico-scientifique, franchissement d’un seuil…, et corrélativement, sur la caractérisation de la nouvelle période ainsi ouverte (nouvelle ère en termes de droits ou d’obligations, ouverture du champ des possibles juridiques ou techniques, révolution épistémique….The analysis of contemporary debates suggests that an important part of the participants’ discursive activity is devoted to a strategy of framing that seeks to propose a certain interpretative context for the exchange of arguments. One of the stakes of such a framing activity is to endow the

  8. Impacto del uso del suelo agropecuario sobre macroinvertebrados acuáticos en pequeñas quebradas de la cuenca del río La Vieja (Valle del Cauca, Colombia

    Directory of Open Access Journals (Sweden)

    Lina Paola Giraldo

    2014-04-01

    Full Text Available Con el fin de determinar el impacto del uso del suelo sobre las características bióticas y abióticas de quebradas en la cuenca del río La Vieja, se evaluaron 21 quebradas en los municipios de Alcalá, Ulloa y Cartago (Valle del Cauca. Siete quebradas estaban protegidas por franjas de vegetación ribereña, ocho tenían influencia agrícola y seis influencia ganadera. Se registraron las condiciones de protección y perturbación del hábitat, aspectos físicos del cauce, se tomaron muestras de agua para análisis fisicoquímico y bacteriológico, y se recolectaron macroinvertebrados acuáticos. En las quebradas con influencia ganadera los sólidos disueltos, la alcalinidad, conductividad y fósforo total fueron significativamente mayores, mientras que el oxígeno disuelto fue significativamente menor. Las quebradas agrícolas y protegidas presentaron más sustratos gruesos y más tipos de corriente. Se recolectaron 26 777 macroinvertebrados de 17 órdenes, 72 familias y 95 géneros. Los grupos con mayor abundancia relativa fueron Diptera 62.8%, (Chironomidae 49.6%, Ceratopogonidae 6.7%, Mollusca 18.8% (Hydrobiidae 7.2%, Sphaeriidae 9.6% y Trichoptera 5.7% (Hydropsychidae 3.7%. Ephemeroptera, Trichoptera y Plecoptera, presentaron mayor abundancia en las quebradas protegidas y con influencia agrícola, mientras los dípteros y moluscos fueron más abundantes en las ganaderas. Las quebradas protegidas y agrícolas presentan mejores condiciones físicas y biológicas que las quebradas con influencia ganadera.

  9. La microrregión como unidad espacial para el estudio de los problemas ambientales. Situación de los recursos suelo, forestal e hídrico en la microrregión Platanar-La Vieja, cuenca del río San Carlos

    Directory of Open Access Journals (Sweden)

    Francisco Rodríguez Barrientos

    2007-05-01

    Full Text Available A partir del ámbito territorial de las cuencas hidrográficas y de las divisiones políticoadministrativas, es posible determinar microrregiones con homogeneidad física,histórica, económica, social y cultural, en las cuales se puedan diseñar y ejecutar planes de manejo consensuados y participativos, algo indispensable para una política sostenible. En el trabajo se presentan elementos teóricos que ayudan a delimitar, precisar y operacionalizar elconcepto de microrregión, y se ofrecen las razones por las que se considera que las microcuencas de los ríos Platanar, Peje y La Vieja dentro de la cuenca del río San Carlos constituyen una microrregión. También se hace una caracterización de la microrregión Platanar-La Vieja, así como una descripción y análisis de los principales problemas que en ella afrontan los recursos suelo, forestal e hídrico.

  10. Secuencias políticas y estabilización de la competencia partidista: volatilidad electoral en viejas y nuevas democracias

    Directory of Open Access Journals (Sweden)

    Scott MAINWARING

    2009-11-01

    Full Text Available RESUMEN: Este artículo examina por qué algunas democracias y semidemocracias desarrollan sistemas de partidos relativamente estables, mientras que otras continúan envueltas en altos niveles de volatilidad electoral. Éste es el primer análisis amplio a nivel comparado regional cross-regional de volatilidad electoral, basado en la información más extensa recolectada sobre el tema. Nuestro hallazgo más original es que los regímenes competitivos inaugurados en períodos tempranos tienen mucha menos volatilidad electoral que aquellos inaugurados más recientemente, incluso controlando una variedad de otros factores que se ha considerado que afectan la volatilidad electoral. Los partidos tenían funciones muy distintas según el momento en que la democracia fue inaugurada y estas diferencias congénitas tuvieron efectos de largo plazo en la estabilización de la competencia partidista. Lo que importa en cuanto a la estabilización de la competencia es cuándo la democracia nació, no cuán antigua es. Nuestros resultados apoyan las aproximaciones de las ciencias sociales que enfatizan las secuencias históricas y el path dependency.ABSTRACT: This article examines why some democracies and semi-democracies develop relatively stable party systems, while others continue to be roiled by high levels of electoral volatility. It is the first broadly cross-regional analysis of electoral volatility, and it is based on the most extensive data assembled on electoral volatility. Our most original finding is that competitive regimes inaugurated in earlier periods have much lower electoral volatility than regimes inaugurated more recently, even controlling for a variety of other factors that have been hypothesized to affect electoral volatility. Parties had very different functions according to when democracy was inaugurated, and these congenital differences had longterm effects on the stabilization of party competition. What matters for the stabilization

  11. Esa vieja costumbre: nacer y morir

    OpenAIRE

    Fasano, Cecilia

    2011-01-01

    La vida humana es un acontecimiento, fechado, relatado, escrito, contado, incluido en mitos, hecho canciones, poesías, rituales, etc. La secuencia que implica nacer, incluirse en una genealogía y morir, más allá de la biología, no deja de ser una construcción de la humanidad. Así, esas breves escrituras llamadas Acta de defunción o Acta de nacimiento, según la ocasión, en definitiva son artificios del lenguaje. De igual modo las canciones de cuna y los cantos fúnebres, constituyen rituales de...

  12. Relativity

    CERN Document Server

    Einstein, Albert

    2013-01-01

    Time magazine's ""Man of the Century"", Albert Einstein is the founder of modern physics and his theory of relativity is the most important scientific idea of the modern era. In this short book, Einstein explains, using the minimum of mathematical terms, the basic ideas and principles of the theory that has shaped the world we live in today. Unsurpassed by any subsequent books on relativity, this remains the most popular and useful exposition of Einstein's immense contribution to human knowledge.With a new foreword by Derek Raine.

  13. ESTRATEGIAS PARA EL ESTUDIO DE SITIOS DEL PERIODO COLONIAL EN EL NORDESTE ARGENTINO: FUERTE SANCTI SPIRITUS (1527-1529 Y SANTA FE LA VIEJA (1573-1660 / Strategies for the study of the colonial period sites in northeastern Argentina: Sancti Spiritus Fort

    Directory of Open Access Journals (Sweden)

    Gabriel Cocco

    2014-12-01

    Full Text Available Normal 0 21 false false false ES-AR X-NONE X-NONE MicrosoftInternetExplorer4 coloniales de la región del Nordeste Argentino. Se toman dos casos de estudio, el fuerte Sancti Spiritus (1527-1529 y Santa Fe la Vieja (1573-1660; ubicados temporalmente en el inicio de la colonización española en Sudamérica y espacialmente sobre la llanura aluvial del Paraná. Los sitios representan dos etapas del colonialismo español y se vinculan a través de su historia, de la materialidad de sus construcciones y de los artefactos, de la[1] procedencia de quienes los ocuparon, del contexto cultural y natural donde fueron emplazados. Se hace una síntesis de la trayectoria seguida en la investigación de ambos asentamientos y se las compara con el fin de realizar algunas consideraciones acerca de las estrategias para el estudio de sitios históricos en esta región.   Palabras clave: asentamientos españoles del siglo XVI; cuenca del Paraná; trayectorias de investigación; métodos de excavación.   Abstract This paper deals with the strategies of archaeological research carried out in colonial sites in the region of the Northeastern Argentina. We considered two cases of study, the Sancti Spiritus Fort (1527-1529 and Santa Fe La Vieja (1573-1660; both enclaves are located temporarily in the beginning of the Spanish colonization in South America and spatially on the alluvial plain of the Paraná River. These sites represent two stages of Spanish colonialism and they are linked through its history, the materiality of their constructions, archaeological artifacts, and the origin of those who occupied these settlements; even we consider their cultural and natural contexts. This work is an overview of the trajectory followed in the study of both settlements and we compare them in order to take into account some considerations about the analytical and methodological strategies for the study of historical sites in this region.   Keywords: Spanish settlement of 16

  14. La aplicación de indicadores en la dimensión de análisis control de plagas y enfermedades para evaluar la sostenibilidad de las fincas agropecuarias en la microrregión Platanar-La Vieja, cuenca del río San Carlos, Costa Rica

    Directory of Open Access Journals (Sweden)

    Francisco Rodríguez Barrientos

    2007-11-01

    Full Text Available Partiendo del criterio de expertos, se diseñó un conjunto de indicadores en tres dimensiones de análisis (forestal, suelos y control de plagas y enfermedades al que se denominó Índice Aproximado de Sostenibilidad para las Fincas de una Microrregión (IASOFIMICRO. El índice permitió evaluar el nivel de aporte de las fincas (alto, medio y bajo a la sostenibilidad y se aplicó a la ganadería de leche, la caña de azúcar y la horticultura, que son las actividades agropecuarias más relevantes de la microrregión Platanar-La Vieja, cuenca del río San Carlos, Costa Rica. En el artículo se presentan los resultados parciales de una investigación de campo, específicamente para la dimensión de análisis suelo, comparando el desempeño de las tres actividades estudiadas según su aporte a la sostenibilidad.

  15. Study of the evolution of aortic atherosclerotic inflammatory plaques using {sup 18}F-FDG PET/CT; Evolution temporelle des foyers inflammatoires d'atherome aortique avec le morphoTEP au {sup 18}F-FDG

    Energy Technology Data Exchange (ETDEWEB)

    Bertrand, A.C.; Netter, F.; Muller, M.A.; Djaballah, W.; Bruna, C.; Olivier, P.; Karcher, G.; Marie, P.Y. [Centre Hospitalier Universitaire, Service de Medecine Nucleaire, 54 - Nancy (France)

    2006-02-15

    PET allows focal uptake of {sup 18}F-FDG to be identified on aortic walls, and these foci might be linked to inflammatory atherosclerotic plaques. The goal of our study was to determine the temporal evolution of these foci. Material and methods: Twenty eight patients undergoing two {sup 18}F-FDG PET/CT within a two month period (1.5{+-}0.5 months on average), were considered. {sup 18}F-FDG uptakes were visually detected on thoracic aorta walls and the maximum activity level of these foci was expressed by a ratio with blood aortic activity (W/B). Results: 35 parietal aortic foci were detected on the initial PET/CT among which 26 were still detected on the second PET/CT together with 5 new foci; therefore the agreement rate between the two examinations was 65% for the visual detection of parietal aortic foci. The ratio W/B was 1.48{+-}0.22 on average. Between the two examinations the evolution of the W/B ratio was only correlated to the initial activity (p=0.02), mainly because the most active foci (W/B>1.6) had a marked activity decrease. Conclusion: When 2 different PET/CT are carried out on the same patients within lower than a two month period, activity from parietal aortic foci seems generally stable, with a concordance rate of 65% between the 2 investigations, and this might relate to a chronic mode of the evolution of inflammation and atherosclerosis. A further decrease in activity was, however, consistently documented for the foci showing the highest activity at baseline, and this might relate to a more evolutive and acute inflammatory process. (author)

  16. Dynamique de structuration spatio-temporelle des populations de ...

    African Journals Online (AJOL)

    SARAH

    30 juin 2014 ... Les mollusques ont été identifiés à l'aide de la clé de Moisan (2010) et de la publication de Brown (1980). Les annélides ont été identifiés avec les clés fournis avec Introduction Pratique à la Systématique des Organismes des Eaux. Continentales Françaises : 3. Annélides Oligochètes de. Lafon (1983).

  17. Dynamique de structuration spatio-temporelle des populations de ...

    African Journals Online (AJOL)

    ... and the Mouhoun stream (Station VI); the sampling method used conventional method the European Union named " Directive Cadre sur l'Eau (DCE) " advised for the sampling of the benthics macroinvertebrates. The survey revealed a community composed in majority of insects (more of 75%) and sparsely distributed.

  18. Evolution temporelle en théorie des cordes

    OpenAIRE

    Bourliot, François

    2010-01-01

    Cette thèse étudie d'une part des modèles cosmologiques en théorie des cordes et d'autre part des applications des flots géométriques à divers aspects de la physique. Nous construisons de nouveaux modèles cosmologiques issus de la théorie des cordes et analysons quelques prédictions obtenues à partir de ces modèles. Nous regardons également comment les flots géométriques permettent de comprendre certains instantons gravitationnels et la théorie de la gravitation d'Horava-Lifschitz....

  19. The San Francisco Declaration: An Old Debate from the Latin American Context / Declaración de San Francisco: una vieja discusión desde el contexto latinoamericano

    Directory of Open Access Journals (Sweden)

    Wilson López López

    2013-06-01

    indicators more relative.But also, we cannot ignore the role that these indicators have been given by incentive systems within Universities and institutions, both for researchers and for research groups. These indicators cannot reflect the whole spectrum of theirefforts or the dynamics of knowledge-producing communities in their early stages of development. Nevertheless, we have enough evidence nowadays that once communities are consolidated, these indicators can provide information about certified quality. That is why most of these measures provideseveral informative dimensions and are useful because they give transparency to the processes that account for research activity. If we did not have these indicators, we would not have any other way to understand this activity.Moreover, open-access systems such as REDALYC and SciELO, distinguished projects committed to promote open-access, have been facing the challenges of improving access for communities that simply do not have enough money to pay forit. These initiatives have been fighting for quality and democratisation of access to knowledge – REDALYC in particular has also suggested alternative indicators for regional academic communities. Up to this point, these voices had been ignored, and it is only now that they are heard again, that mainstream scholars raise their own to discuss somethingwe had been debating for years in our region. Furthermore, globally Scimago group has had an outstanding job and complementary for measurement of isolated indicators developing multiple and complex measures of production, impact and use of knowledge.I think we also need to ask ourselves what forces and interests are behind this discussion today. Maybe emergent communities are unleashing these declarations calling for a change in the rules? Is this rediscovery important now that these emergent academic communities have a voice and citations? In this sense, these rebellions must be taken witha pinch of salt, because we have been

  20. La Brecha entre EEUU y la “Vieja Europa”

    OpenAIRE

    Vélez Sanchez, Paola

    2003-01-01

    El distanciamiento que hoy observamos entre las actitudes de los Estados Unidos (EEUU) y Francia frente a temas como el uso de la fuerza y el derecho internacional, tiene un punto álgido en el debate que giró en torno a la redacción y aprobación de la Resolución 1441 del Consejo de Seguridad de las Naciones Unidas (CSNU) sobre Irak. A la luz de esta brecha entre los EEUU y la Francia consideramos conveniente revisar este proceso a través de los instrumentos analíticos ofrecidos por dos aproxi...

  1. Viejas formas para ciudades nuevas. / Old forms for new cities.

    Directory of Open Access Journals (Sweden)

    Munford, Lewis [1953

    2006-06-01

    Full Text Available Escrito de L. Mumford con sus opiniones sobre las New Towns inglesas, donde nos recuerda que, por encima de todo, una ciudad es un medio de proporcionar un máximo de contactos sociales y de satisfacciones, y que cuando los espacios se abren con demasiada amplitud y la dispersión es demasiado constante, la gente carece de un escenario acogedor para sus actividades y el teatro de su vida cotidiana queda fuera de foco./Writing by Lewis Mumford that presents his views on the english New Towns. He emphasizes on the fact that the city, above all, is a medium that must provide social contact and satisfactions. When spaces within the cities become broader and urban sprawl occurs, citizens are left without comfortable settings for their activities and the “theatre” of their daily life is left out of focus.

  2. Patrimonios invisibles y diseminados. Nuevas miradas, viejas visiones

    OpenAIRE

    Vidal Matías, Emilio

    2013-01-01

    Es preciso aplicar nuevas políticas,miradas y métodos en la acción patrimonial de aquellos territorios económicamente empobrecidos que atesoran un considerable capital cultural y que paradójicamente se presentan como invisibles y diseminados. Para remediar esta situación es preciso impulsar un cambio que debe ser liderado por quienes tienen la responsabilidad de estimular aquellos sectores competitivos que, como el patrimonio, disponende los recursos para ello. Los planes patrimoniales son un...

  3. Exceso de peso corporal e hipertensión arterial en adolescentes de secundaria básica Corporal excess weight related to high blood pressure in adolescent students of secondary school

    Directory of Open Access Journals (Sweden)

    José Luís Álvarez Gómez

    2010-03-01

    Full Text Available Introducción: el exceso de peso y la hipertensión arterial constituyen factores de riesgo aterosclerótico cuyas prevalencias se incrementan de forma creciente a nivel global, cada vez en edades más tempranas. Objetivos: contribuir al esclarecimiento de la relación entre el exceso de peso (sobrepeso y obesidad y la tensión arterial elevada en adolescentes. Métodos: se realizó un estudio observacional en 344 jóvenes entre 12 y 16 años de edad, estudiantes de la Secundaria Básica Urbana "Benito Juárez" del área de salud del policlínico "Antonio Guiteras Holmes" en La Habana Vieja, entre enero de 2005 y enero de 2006. A todos los estudiantes se les realizaron mediciones antropométricas de peso corporal, talla y circunferencia de la cintura. La asociación entre el exceso de peso y las cifras de tensión arterial elevadas se determinó mediante la prueba de Chi cuadrado con un nivel de significación de pIntroduction: the excess weight and high blood pressure are risk atherosclerosclerosis factor whose prevalences increase at global level in earlier ages. Objectives: to contribute to clearing up of relation between the excessive body weight (excess weight and obesity and the high blood pressure in adolescents. Methods: an observational study was conducted in 344 young people aged between 12 and 16 studying in "Benito Juárez" Secondary School from health area of "Antonio Guiteras" Polyclinic in Habana Vieja municipality between January, 2005 and January, 2006. In all students we made anthropometric measurements of body weight, height and waist circumference. The association between excess weight and the figures of high blood pressure was determined by Chi² test with a value of p < 0,05. Results: there was a 14% excess weight and a 4% of obesity. High blood pressure (systolic and/or diastolic was present in the 4.7% of young people and the pre-high blood pressure in the 18.6% increasing with age in both sexes. There was a significant

  4. Lactancia materna y su relación con el exceso de peso corporal en adolescentes de secundaria básica Breastfeeding and its relation to corporal excess weight in secondary school adolescents

    Directory of Open Access Journals (Sweden)

    Eumelia Ondina Terrero

    2010-03-01

    Full Text Available Introducción: el sobrepeso y la obesidad, factores de riesgo aterosclerótico, se incrementan de manera creciente en todas las edades. Las trasgresiones de la lactancia materna han sido relacionadas frecuentemente con el exceso de peso. Objetivos: contribuir al esclarecimiento de la relación entre la duración de la lactancia materna y el exceso de peso (sobrepeso y obesidad en adolescentes. Métodos: estudio observacional de casos y controles en 344 adolescentes que estudian en la Secundaria Básica Urbana "Benito Juárez" del área de salud del policlínico "Antonio Guiteras Holmes" en La Habana Vieja, realizado entre enero de 2005 y enero de 2006. A todos los estudiantes se les realizaron mediciones antropométricas de peso corporal, talla y circunferencia de cintura. El grupo control se conformó con los estudiantes normopeso. La asociación estadística entre la duración de la lactancia materna y el exceso de peso corporal se determinó mediante el cálculo de odds ratio con un nivel de significación de pIntroduction: the excess weight and obesity are atherosclerosis risks increasing in all ages. Transgressions of breastfeeding have been related frequently to excess weight. Objectives: to contribute to clearing up of relation between the length of breastfeeding and the excessive body weight (excess weight and obesity in adolescents. Methods: this is an observational study of cases and controls conducted in 344 adolescents studying in "Benito Juárez" Urban Secondary School (UBS from health area of "Antonio Guiteras Holmes" Polyclinic in Habana Vieja (January, 2005 to January, 2006. In all students we made anthropometry measurements of body weight, height and waist circumference. Control group included students with normal weight. Statistical association between breastfeeding and corporal excess weight was determined by odds ratio calculus con a 95 % accuracy. Results: it was verified the 14 % of excess weight and the 4% of obesity. The

  5. Les systèmes écologiques post-culturaux de la zone soudanienne (Burkina-Faso) : structure spatio-temporelle des communautés végétales et évolution des caractères pédologiques

    OpenAIRE

    Some, Namwinyoh Antoine

    1996-01-01

    La succession post-culturale avec des changements relativement rapides offre l'opportunité de traiter de la dynamique et du fonctionnement des savanes, milieu constamment soumis à des perturbations importantes sporadiques. Dans les successions post-culturales, des remplacements de groupements végétaux se produisent et des modifications des propriétés physiques, chimiques et biologiques du sol sont décelables. A travers cette étude spécifique des relations "formation de groupements végétaux et...

  6. B{sup 0}{sub s} - B-bar{sup 0}{sub s} mesons oscillations temporal dependence in the Delphi experiment; Etude de la dependance temporelle des oscillations des mesons B{sup 0}{sub s} -B-bar{sup 0}{sub s} dans l`experience Delphi

    Energy Technology Data Exchange (ETDEWEB)

    Ripp-Baudot, I.

    1996-05-09

    B{sup 0}{sub s} oscillations have been studied in the DELPHI experiment. The B{sup 0}{sub s} oscillation frequency is related to the abs(V{sub ts}) Cabibbo-Kobayashi-Maskawa matrix element and its measurement constitutes a test of the standard model. Furthermore it provides the ratio abs(V{sub td}/V{sub ts}) with reduced theoretical uncertainties when combined with the measurement of the B{sup 0}{sub d} oscillation frequency. The value of this ratio constraints the phase of CP violation in the standard model. The analysis consists in reconstructing semi-exclusively B{sup 0}{sub s} mesons in D{sub s} and D{sub s} -leptons channels, using 3.2 millions of Z decaying into hadrons, collected by DELPHI from 1991 to 1994 at LEP. The nature of particle or anti-particle of the B{sup 0}{sub s} at production time is tagged by a jet charge method, that has been optimized to the semi-exclusive case. The nature at decay time, the oscillation frequency is determined by adjusting the oscillation curve with a likelihood method. (author). 83 refs., 115 figs., 35 tabs.

  7. Les circulants entre métropoles européennes à l’épreuve de leurs mobilités. Une lecture temporelle, spatiale et sociale de la pénibilité Circulating between European cities: A temporal, spatial and social reading of arduous mobility

    Directory of Open Access Journals (Sweden)

    Matthieu Giroud

    2011-09-01

    three dimensions offers a means to characterize the people who circulate in terms of mobility situations through which they conceive of the wearisome dimension of circulation. Mobility situations that are well appreciated seem to reveal a relatively balanced way of life associated with circulation. However, the article identifies a number of factors that may contribute to weaken or qualify these situations: weariness, lack of space of identification and project, management within family of the absence of those who circulate, changes in relation to places of healing, and limitations in practicing the places that structure the space of circulation. Overall, there is no clear segmentation between these situations of mobility in terms of difficulty. Situations of mobility that are very different can be experienced in many varied ways. The tiring dimension of circulation ultimately depends on a combination of factors which, taken separately, have no mechanical effect.

  8. Tomographie temporelle de la densité par la mesure des muons

    OpenAIRE

    Hivert, Fanny

    2015-01-01

    The muons, charged particles of cosmic origin, have the particularity of being very penetrative. The attenuation of muon flux in matter highlights the quantity of matter (depth x density) passed through. Based on this principle, the muography is a technique allowing the study of the in-situ density of large targets as geological structures. The Temporal Tomography of rock Density using Muon Measurements (T2DM2) aims at characterizing the spatial and temporal density variations with a first ap...

  9. Dynamique spatio-temporelle de Planococcus ficus (Signoret, 1875 dans les vignobles de la Mitidja (Algeria

    Directory of Open Access Journals (Sweden)

    Fatima Zohra Bissaad

    2017-06-01

    Full Text Available Bissaad, F. Bounaceur, F. and Doumandji-Mitichet B. 2017. Spatio-temporal dynamics of Planococcus ficus (Signoret, 1875 in the vineyards of Mitidja (Algeria. Lebanese Science Journal. 18(1: 26-46. Until now, the research undertaken in Algeria on controlling Planococcus ficus or mealybug, a pest responsible of high level of damages on vines, were very limited. A study on the spatiotemporal dynamics of the pest was conducted for three years in the vineyards of the Western Mitidja in Algeria. The weekly sampling of leaves and clusters were carried out from 2006 to 2008, on wine and table grapes. A high contamination by P. ficus was observed in summer and the beginning of autumn depending on the varieties and years. The monitoring system showed the development of 5 to 6 successive peaks on leaves, and 3 to 4 successive peaks on grape clusters.

  10. Contamination spatio-temporelle d'origine hydrique de l'oued ...

    African Journals Online (AJOL)

    Le suivi spatio-temporel des coliformes totaux (CT), coliformes fécaux (CF), streptocoques fécaux (SP), anaérobie clostridium sulfito-réducteurs (ACSR) et flore mésophile totale (FMAT) montre que la charge bactérienne de ces germes dépasse largement les normes marocaines et les directives de l'organisation mondiale ...

  11. Etude des variations spatio-temporelles de la pollution des eaux de ...

    African Journals Online (AJOL)

    Les eaux de six points de cette lagune ont été prélevées et analysées, pendant les quatre saisons de l'année, afin de déterminer les teneurs en fer, manganèse, chrome, plomb, cadmium et mercure. Les métaux (Fe, Cd, Pb, Cr, Mn) ont été déterminés par la méthode des kits MERCK au spectrophotomètre NOVA 60.

  12. Figures temporelles dans le cinéma arborescent d’Arnaud Desplechin

    OpenAIRE

    Lieb, Marie-Anne

    2016-01-01

    Constitué de récits romanesques, ayant trait à l’introspection de personnages mêlant confessions et réflexions, le cinéma d’Arnaud Desplechin travaille la dualité narrative. Telle une poétique du roman, les récits se composent de liaison, de continuité autant que d’éclatement et de discontinuité. Proche de la technique d’un peintre impressionniste, le cinéaste rend palpable par touches successives l’intériorité des personnages suivant des perspectives démultipliées et décrit ainsi un art du t...

  13. 227 Données préliminaires sur la distribution spatio-temporelle des ...

    African Journals Online (AJOL)

    Niamien

    appels sexuels, ont été identifiées grâce à la contribution du Centre National de Floristique de l'Université Félix. Houphouët-Boigny d'Abidjan Cocody. Le dénombrement des mâles de chauves-souris à tête de marteau a été réalisé dans tous les ...

  14. Gestion spatio-temporelle de la soudure alimentaire dans le Sahel burkinabé

    OpenAIRE

    Janin, Pierre

    2004-01-01

    National audience; Les espaces sahéliens sont marqués par la récurrence et la diversité des problèmes alimentaires (disponibilités insuffisantes, aléatoires ou inaccessibles). Une des principales difficultés à laquelle sont confrontés chercheurs et décideurs consiste donc à caractériser la nature de ce risque dans le temps et dans l'espace et à mesurer la vulnérabilité réelle des Sahéliens à l'insécurité alimentaire. Compte tenu des faibles capacités d'intervention des Etats et des organismes...

  15. Evolution spatiale et temporelle des dégâts du jasside Jacobiella ...

    African Journals Online (AJOL)

    Depuis quelques années, ses attaques sont persistantes sur tout le cycle cultural malgré les traitements insecticides. Cette étude visait à analyser les distributions ... Cette donne recommande l'élaboration d'une nouvelle stratégie de gestion efficace contre le ravageur. Mots clés : Jasside, pluviométrie, évolution ...

  16. Relativity made relatively easy

    CERN Document Server

    Steane, Andrew M

    2012-01-01

    Relativity Made Relatively Easy presents an extensive study of Special Relativity and a gentle (but exact) introduction to General Relativity for undergraduate students of physics. Assuming almost no prior knowledge, it allows the student to handle all the Relativity needed for a university course, with explanations as simple, thorough, and engaging as possible.The aim is to make manageable what would otherwise be regarded as hard; to make derivations as simple as possible and physical ideas as transparent as possible. Lorentz invariants and four-vectors are introduced early on, but tensor not

  17. Vulnerabilidade do lugar vs. vulnerabilidade sociodemográfica: implicações metodológicas de uma velha questão Vulnerabilidad del lugar vs. vulnerabilidad sociodemográfica: implicaciones metodológicas de una vieja cuestión Place vulnerability vs. sociodemographic vulnerability: methodological implications of a very old issue

    Directory of Open Access Journals (Sweden)

    Eduardo Marandola Jr.

    2009-12-01

    vivido. A partir de una serie de trabajos empíricos desarrollados en los últimos años, este artículo reflexiona sobre las posibilidades de esa perspectiva teórico-metodológica, que utiliza una práctica cualitativa de campo y una orientación geográfica en la construcción de un diálogo más estrecho entre Geografía y los estudios poblacionales, a partir del campo Población y Ambiente.The question of "vulnerability to what?" is standard in studies on risks and dangers. In demographic studies the issue comes up in regard to demographic groups that are subject to dangers that can be related to the characteristics of the demographic dynamics or to the groups' socioeconomic situation, which have to do with their life course, family structure or migratory characteristics. The field of population and environment added the spatial dimension to the issue, considering position and situation, which are components of the elements that produce dangers or that provide the conditions to face them. On the one hand, one can note the influence of an ecological approach, which sees the environment as a physical-social set that influences and is influenced by the population and, on the other, the presence of materialistic postulates, which conceive the relationships between society and nature as a social and historical factor regulated by the contradictory and unequal production of space and society. The causal matrix of risks and elements that can interfere in vulnerability is considerably higher in environments strongly modified by human beings, such as large cities. This fact makes it difficult to grasp the causal relationships between certain dangers and certain characteristics of the demographic group. In view of this, observing dangers and the vulnerability of places is a strategy that, on a micro scale, enables one to detect the factors that interfere in the production, acceptance and mitigation of risks. The ecological dimension is re-signified when it incorporates the

  18. Nuevos mayores, viejas brechas: TIC, desigualdad y bienestar en la tercera edad en Italia

    Directory of Open Access Journals (Sweden)

    Piermarco Aroldi

    2015-07-01

    Full Text Available Italia parece tener un retraso de unos diez años en comparación con otros países más digitalizados, tanto en el uso de las TIC por las personas mayores como en el estudio de la relación entre las TIC y los mayores de 65 años. Por ello, se hace urgente examinar los factores que influyen en la adopción de las tecnologías por los mayores y la capacidad real de estas para proporcionar recursos culturales e interactivos, útiles para mejorar el envejecimiento activo y mejorar su calidad de vida en salud y vida social. Este trabajo describe los principales resultados de un estudio que involucró a 900 italianos de 65 a 74 años, en el marco de un proyecto nacional de investigación sobre el envejecimiento activo. El estudio indaga en las características sociodemográficas de los mayores italianos usuarios de Internet y en los factores que influyen en el uso de las TIC. Los resultados evidencian que existe una fuerte brecha digital entre los mayores, influenciada por el contexto económico y cultural. En cuanto al envejecimiento activo, se demuestra que los mayores altamente digitales presentan una mejor vida saludable en su envejecimiento, sin poderse concluir que el uso de las TIC garantice la inclusión y participación.

  19. ANTIFLAMATORIOS NO ESTEROIDEOS Y SU USO EN ODONTOLOGIA: UNA VIEJA COSTUMBRE

    OpenAIRE

    Rodriguez Alfaro, Miguel O.; Odontólogo graduado de la facultad de Odontología de la Universidad Nacional Mayor de San Marcos. Ex- Docente de farmacología de la Facultad de Odontología de la U.N.M.S.M. Ex- docente de farmacología de la Facultad de Odontología de la USMP. Docente del Departamento Médico quirúrgico de la Facultad de Odontología de la U.N.M.S.M. Docente permanente de Farmacología del Post- grado de la Sociedad Peruana de Endodoncia.

    2014-01-01

    Desde la aparición del hombre ha habido una sensación temida, incluso por aquellos más "valientes": la odontalgia o dolor dental, y su abolición por quienes estamos dedicados a esta especialidad siempre ha representado un reto. Una de las herramientas de la terapéutica moderna es el uso de los antiflamatorios no esteroideos (AINES). Desde la antiguedad se han buscado recetas de muy variada índole para su tratamiento, empleándose en algunas civilizaciones el opio o jugo de amapola, el cual era...

  20. Viejas y nuevas estratégias codificadoras del Derecho Internacional Privado Interamericano

    Directory of Open Access Journals (Sweden)

    Ruben Santos Belandro

    2014-10-01

    Full Text Available Contenido: Una primera noción del vocablo codificación. América Latina, campo propicio para la codificación de las normas de Derecho Internacional Privado.  La adopción de un nuevo paradigma para codificar. Avances en la codificación interamericana de Derecho Internacional Privado. Los conflictos entre convenciones y leyes nacionales y sus posibles soluciones.  El reconocimiento de un pluralismo metodológico para una regulación más satisfactoria de las relaciones privadas internacionales. Una nueva visión de la imperatividad de los principios y de las normas en el campo del Derecho Internacional Privado. La creación de las autoridades centrales, un puntal insustituible para favorecer la cooperación jurisdiccional regional. Conclusiones finales

  1. El concepto de clases en Bourdieu: ¿nuevas palabras para viejas ideas?

    OpenAIRE

    Graciela Inda; Celia Duek

    2005-01-01

    Los trabajos de Pierre Bourdieu han llegado a ocupar en los últimos tiempos un lugar considerable en los ámbitos académicos de las ciencias sociales, al punto de que muchos consideran a Bourdieu uno de los más importantes teóricos de la sociología actual. Los aspectos de su obra que aquí nos interesan son la discusión acerca del concepto de clase social y la crítica al enfoque marxista de las clases, inspirados uno y otro en su teoría de los campos sociales. La pregunta a la que intentaremos ...

  2. Viejas y nuevas geografías en el ex Vaso de Texcoco, México

    Directory of Open Access Journals (Sweden)

    Maribel Espinoza Castillo

    2012-02-01

    Full Text Available La construcción social del espacio se encuentra inserta en un nuevo escenario geográfico en el cual el análisis local toma una nueva dimensión. La condición de globalidad adquirida por los procesos productivos, relaciones sociales y expresiones culturales, pese a homogeneizar procesos, se hace muy específica a nivel de países y de comunidades. En la construcción social del espacio en el ex lago de Texcoco desde mediados de los cuarenta, esfuerzos, obras, vida cotidiana y deseos de progreso, fueron gran parte de los elementos que impulsaron la construcción de las viviendas y la gestión e introducción de servicios públicos. A partir de la década de los ochenta, la regularización del suelo, la consolidación de la vivienda, la aparición de equipamientos comerciales y los nuevos modelos culturales, favorecieron la consolidación del área, sus relaciones con el exterior y ampliaron las escalas geográficas.

  3. Motivación en el trabajo: viejas teorías, nuevos horizontes.

    Directory of Open Access Journals (Sweden)

    José Navarro-Cid

    2008-01-01

    Full Text Available A pesar de tratarse de uno de los constructos centrales en psicología de lasorganizaciones y del trabajo, la investigación y el desarrollo de nuevas teorías en motivación laboral han disminuido considerablemente en los últimos años. Varios autores atribuyen estasituación al dominio ejercido por las teorías clásicas y plantean la necesidad de desarrollarnuevos enfoques teóricos y nuevas estrategias metodológicas con el fin de revitalizar el campoadecuándolo a las condiciones vigentes en la actualidad. En este trabajo se analizan algunas delas críticas más importantes dirigidas a las teorías de la motivación -principalmente a las teoríasde procesos-, prestando especial atención a aquélla que indica que estas teorías han falladosistemáticamente al analizar los efectos potenciales del tiempo sobre los componentes másimportantes de la teoría. Sobre la base de esta crítica la tesis principal que se sostiene ydefiende en este artículo es que la motivación laboral apenas ha sido estudiada como proceso.Por otra parte, se presentan enfoques alternativos para el estudio de la motivación centradosprincipalmente en el estudio del comportamiento dinámico y complejo del fenómeno.

  4. DIGITAL DOCUMENTATION AND ARCHIVING LOW COST: LA HABANA VIEJA IN CUBA

    Directory of Open Access Journals (Sweden)

    C. Morganti

    2017-11-01

    Full Text Available This article deepens the subject of photo-modelling applied to architecture, on a medium and large scale and it shows all the possibilities to apply the last technologies of augmented reality and virtual reality to the historical and architectural contest of Havana City in Cuba. The context was quite unsuitable to our project because of different and complex reasons. The need to minimize the size of the tools, their weight and cost. Minimize the time of survey and photographic shot on site. To face the difficulties given by the continuing presence of a chaotic influx of people disturbing the work. Not least the difficulty of having a limited number of daily hours available to carry out photographic shots that requires special lighting conditions. This article describes the necessary steps to obtain a 3D dimensional textured model from reality through a photographic set.

  5. Digital Documentation and Archiving Low Cost: la Habana Vieja in Cuba

    Science.gov (United States)

    Morganti, C.; Bartolomei, C.

    2017-11-01

    This article deepens the subject of photo-modelling applied to architecture, on a medium and large scale and it shows all the possibilities to apply the last technologies of augmented reality and virtual reality to the historical and architectural contest of Havana City in Cuba. The context was quite unsuitable to our project because of different and complex reasons. The need to minimize the size of the tools, their weight and cost. Minimize the time of survey and photographic shot on site. To face the difficulties given by the continuing presence of a chaotic influx of people disturbing the work. Not least the difficulty of having a limited number of daily hours available to carry out photographic shots that requires special lighting conditions. This article describes the necessary steps to obtain a 3D dimensional textured model from reality through a photographic set.

  6. El concepto de clases en Bourdieu: ¿nuevas palabras para viejas ideas?

    Directory of Open Access Journals (Sweden)

    Graciela Inda

    2005-12-01

    Full Text Available Los trabajos de Pierre Bourdieu han llegado a ocupar en los últimos tiempos un lugar considerable en los ámbitos académicos de las ciencias sociales, al punto de que muchos consideran a Bourdieu uno de los más importantes teóricos de la sociología actual. Los aspectos de su obra que aquí nos interesan son la discusión acerca del concepto de clase social y la crítica al enfoque marxista de las clases, inspirados uno y otro en su teoría de los campos sociales. La pregunta a la que intentaremos dar respuesta es ¿constituyen crítica y propuesta formulaciones realmente originales?

  7. Otomies hidalguenses y mayas yucatecos. Nuevas caras de la migracion indigena y viejas formas de organizacion

    National Research Council Canada - National Science Library

    Solis Lizama, Mirian; Fortuny Loret de Mola, Patricia

    2010-01-01

    ...) del estado de Hidalgo y los mayas yucatecos del noreste de la entidad. El interes se centra en describir y explicar la relacion que estas etnias han sostenido con el Estado mexicano a lo largo de la historia...

  8. Podemos y el auge municipalista. Sobre partidosciudadanía y vieja política.

    Directory of Open Access Journals (Sweden)

    Ángel Calle Collado

    2015-01-01

    Full Text Available En este texto me detengo en las aportaciones en clave de experimentación que están realizando nuevas iniciativas políticas en clave de partido, como son Podemos y las nuevas iniciativas municipalistas. Experimentaciones que, como dicen visiones tan diversas como la del sociólogo Sousa Santos (“reinventar el Estado”, “democracias de alta intensidad” o la proveniente del zapatismo (“caminamos preguntando”, se hace necesaria para construir rebeldías. ¿Pertenecen Podemos o las nuevas candidaturas municipalistas a este campo de rebeldías? Aspiran a ello, así lo enuncian, pero, ¿qué tipo de herramienta acabará por cristalizar? ¿estará próxima a la radicalización de la democracia, o manifestará tintes no tan distintos de esos partidos que salen tanto por la tele?

  9. Rutas turísticas a partir del patrimonio industrial. Nuevos productos en viejas estructuras

    Directory of Open Access Journals (Sweden)

    Guillermina Fernández

    2004-11-01

    Full Text Available La actividad industrial de cualquier época tiene gran importancia para el hombre, pues formando parte de la economía permite dotar de identidad a una sociedad. El presente artículo tiene como objetivo presentar el patrimonio industrial como recurso para organizar rutas turísticas que permitan en algunos casos recuperar espacios industriales abandonados o usar establecimientos industriales en funcionamiento, pero que pueden incorporarse a este tipo de desarrollo turístico. La creación de rutas turísticas puede permitir la reactivación de las economías locales, por constituirse en definitiva en una nueva actividad económica. Para lograr esto es necesario articular el sector público y el privado. De esta forma es posible, a través de la creación de rutas turísticas del patrimonio industrial, generar un desarrollo turístico local sustentable. Dentro de esta alternativa de desarrollo turístico que muestran los autores, la educación cumple un papel importante y es un aspecto estratégico para el logro de una dinámica jalonadora de beneficios socioeconómicos y culturales para las comunidades y, por ende, del desarrollo integral de éstas.

  10. Relational databases

    CERN Document Server

    Bell, D A

    1986-01-01

    Relational Databases explores the major advances in relational databases and provides a balanced analysis of the state of the art in relational databases. Topics covered include capture and analysis of data placement requirements; distributed relational database systems; data dependency manipulation in database schemata; and relational database support for computer graphics and computer aided design. This book is divided into three sections and begins with an overview of the theory and practice of distributed systems, using the example of INGRES from Relational Technology as illustration. The

  11. Social relations

    DEFF Research Database (Denmark)

    Due, P; Holstein, B; Lund, R

    1999-01-01

    We introduce a conceptual framework with social relations as the main concept and the structure and the function of social relations as subconcepts. The structure of social relations covers aspects of formal relations and social network. The function of social relations covers social support......, social anchorage and relational strain. We use this conceptual framework to describe social relations in the Danish population, with questionnaire data from the Danish Longitudinal Health Behaviour Study including a random sample of each of the age groups 25-, 50-, 60-and 70-year olds, N = 2......,011. The postal questionnaires were answered by a random sample in each of the age groups. The results show marked age and gender differences in both the structure and the function of social relations. The social network, measured as weekly contacts, weakens with age and so does instrumental support. Emotional...

  12. Relational Leadership

    DEFF Research Database (Denmark)

    Madsen, Charlotte Øland; Rasmussen, Jørgen Gulddahl

    2015-01-01

    In this chapter, we emphasise what we have outlined as interesting areas of relational leadership and present some ideas on how to facilitate a broader understanding of relational leadership practice. This involves the interpretations that create connections between practice and ontology. We...... elaborate on how leadership in everyday situations can be understood from a relational perspective. The chapter will focus on outlining and inspiring the reader to co-operate with other people to develop further relational understandings of leading....

  13. ALIKO et al.(1).pmd

    African Journals Online (AJOL)

    SECRETARIAT

    Les analyses ont porté sur la dynamique spatio-temporelle du sex-ratio, de la structure des tailles, des relations longueur-poids et ... assurer une production optimale exigent une connaissance de la biologie des populations de ... Map of lake Taabo showing the sampling stations. ECHANTILLONNAGE ET ANALYSE DES.

  14. Etude des groupements végétaux de la forêt classée d'Agrimey ...

    African Journals Online (AJOL)

    05) phytocénoses sur la base des relations spatio-temporelles : la phytocénose à Chromolaena odorata des milieux ensoleillés, la phytocénose à Imperata cylindrica indica et Chromolaena odorata des milieux dégradés, la phytocénose à ...

  15. Numerical relativity

    CERN Document Server

    Shibata, Masaru

    2016-01-01

    This book is composed of two parts: First part describes basics in numerical relativity, that is, the formulations and methods for a solution of Einstein's equation and general relativistic matter field equations. This part will be helpful for beginners of numerical relativity who would like to understand the content of numerical relativity and its background. The second part focuses on the application of numerical relativity. A wide variety of scientific numerical results are introduced focusing in particular on the merger of binary neutron stars and black holes.

  16. Distribution of stable isotopes in arid storms . I. Relation between the distribution of isotopic composition in rainfall and in the consequent runoff

    Science.gov (United States)

    Adar, E. M.; Dody, A.; Geyh, M. A.; Yair, A.; Yakirevich, A.; Issar, A. S.

    Temporal distributions of the isotopic composition in arid rain storms and in the associated runoff were investigated in a small arid rocky basin in Israel. Customized rain and runoff samplers provided sequential water samples hermetically sealed in high-density PVC bags. In several storms where the runoff was isotopically depleted, compared with the rainfall, the difference could not be explained by fractionation effects occurring during overland flow. A water-balance study relating the runoff discharge to rainfall over a rocky watershed showed that the entire discharge is produced by a very small segment (1-2mm) of the rain storm. The major objective, therefore, was to provide quantitative relations between segments of rainfall (rain showers and rain spells) and runoff. The time distribution of the composition of stable isotopes (oxygen and hydrogen) was used to quantify the correlation between the rain spell's amount and the consequent runoff. The aim of this work was to (a) utilize the dynamic variations in the isotopic composition in rainfall and runoff and model the magnitude of surface-storage capacity associated with runoff processes of overland flow, and (b) characterize the isotopic composition of the percolating water with respect to the isotopic distribution in rainfall and runoff events. The conceptual model postulates an isotopic mixing of overland flow with water within the depression storage. A transport model was then formulated in order to estimate the physical watershed parameters that control the development of overland flow from a certain rainfall period. Part I (this paper) presents the results and the assessment of the relative depression storage obtained from oxygen-18 and deuterium analyses that lead to the physical and mathematical formulation of a double-component model of kinematic-wave flow and transport, which is presented in Part II (accompanying paper). Résumé Les variations temporelles, en zone aride, de la composition isotopique

  17. Numerical Relativity

    Science.gov (United States)

    Baker, John G.

    2009-01-01

    Recent advances in numerical relativity have fueled an explosion of progress in understanding the predictions of Einstein's theory of gravity, General Relativity, for the strong field dynamics, the gravitational radiation wave forms, and consequently the state of the remnant produced from the merger of compact binary objects. I will review recent results from the field, focusing on mergers of two black holes.

  18. View relations

    DEFF Research Database (Denmark)

    Knudsen, Søren; Carpendale, Sheelagh

    2016-01-01

    In this paper, we explore the potential of using visual representations to support people in managing, organizing, and understanding relations between multiple visualization views. Multiple views can help people understand different facets of data and data processing, and are a crucial part of data...... analysis particularly when it is done collaboratively. Both the growing use of multiple views and the increasing display sizes have amplified the need to explore how to better help people to understand the relations between many views. To improve our understanding of how to visualize view relations, we...... invited visualization and interaction designers to critique and sketch representations of view relations. The participants provided design critiques, and sketched their own relation representations. Our findings expand the range and palette of ways of visually linking visualization views and suggest new...

  19. Approches variationnelles statistiques spatio-temporelles pour l'analyse quantitative de la perfusion myocardique en IRM

    OpenAIRE

    Hamrouni-Chtourou, Sameh,

    2012-01-01

    Quantitative assessment of moycardium perfusion, i.e. computation of perfusion parameters which are then confronted to normative values, is a key issue for the diagnosis, therapy planning and monitoring of ischemic cardiomyopathies --the leading cause of death in Western countries. Within the last decade, perfusion magnetic resonance imaging (p-MRI) has emerged as a reference modality for reliably assessing myocardial perfusion in a noninvasive and accurate way. In p-MRI acquisitions, short-a...

  20. Classification non supervisée de données spatio-temporelles multidimensionnelles. Applications à l'imagerie.

    OpenAIRE

    Mure, Simon

    2016-01-01

    Due to the dramatic increase of longitudinal acquisitions in the past decades such as video sequences, global positioning system (GPS) tracking or medical follow-up, many applications for time-series data mining have been developed. Thus, unsupervised time-series data mining has become highly relevant with the aim to automatically detect and identify similar temporal patterns between time-series. In this work, we propose a new spatio-temporal filtering scheme based on the mean-shift procedure...

  1. Modelisation temporelle de la consommation electrique en analyse du cycle de vie appliquee au contexte des TIC

    Science.gov (United States)

    Maurice, Elsa

    Fossil fuels are a scarce energy resource. Since the industrial revolution, mankind uses and abuses of non-renewable energies. They are responsible for many environmental damages. The production of energy is one of the main challenges for a global sustainable development. In our society, we can witness an exponential increase of the usage of the systems of Information and Communication Technologies (ICT) such as Internet, phone calls, etc. The ICT development allows the creation and optimization of many smart systems, the pooling of services, and it also helps damping the climate change. However, because of their electric consumption, the ICT are also responsible for some green house gases (GHG) emissions: 3% in total. This fact gives them the willingness to change in order to limit their GHG emissions. In order to properly evaluate and optimize the ICT services, it is necessary to use some methods of evaluation that comply with the specificity of these systems. Currently, the methods used to evaluate the GHG emissions are not adapted to dynamic systems, which include the ICT systems. The variations of the production of electricity in a day or even a month are not yet taken into account. This problem is far from being restricted to the modelling of GHG emissions, it widens to the global variation in production and consumption of electricity. The Life Cycle Assessment (LCA) method grants useful and complete tools to analyse their environmental impacts, but, as with the GHG computation methods, it should be dynamically adapted. In the ICT framework, the first step to solve this LCA problem is to be able to model the variations in time of the electricity production. This master thesis introduces a new way to include the variation in time of the consumption and production of electricity in LCA methods. First, it generates an historical hourly database of the electricity production and import-export of three Canadian states: Alberta, Ontario and Quebec. Then it develops a model in function of time to predict their electricity consumption. This study is done for a project implementing a " cloud computing " service in between these states. The consumption model then provides information to optimize the best place and time to make use of ICT services such as Internet messaging or server maintenance. This first-ever implementation of time parameter allows more precision and vision in LCA data. The disintegration of electrical inventory flows in LCA refines the effects of the electricity production both historically and in real time. Some short-term predictions for the state of Quebec electrical exportations and importations were also computed in this thesis. The goal is to foresee and optimize in real time the ICT services use. The origin of a kilowatt-hour consumed in Quebec depends on the import-export variable with its surrounding states. This parameter relies mainly on the price of the electricity, the weather and the need for the state of Quebec in energy. This allows to plot a time-varying estimate of the environmental consequences for the consumption of a kilowatt-hour in Quebec. This can then be used to limit the GHG emission of ICT services like " cloud-computing " or " smart-grids ". A smart trade-off between electricity consumption and environmental issues will lead to a more efficient sustainable development.

  2. Relational Blackboard

    Energy Technology Data Exchange (ETDEWEB)

    2012-09-11

    The Relational Blackboard (RBB) is an extension of the H2 Relational Database to support discrete events and timeseries data. The original motivation for RBB is as a knowledge base for cognitive systems and simulations. It is useful wherever there is a need for persistent storage of timeseries (i.e. samples of a continuous process generating numerical data) and semantic labels for the data. The RBB is an extension to the H2 Relational Database, which is open-source. RBB is a set of stored procedures for H2 allowing data to be labeled, queried, and resampled.

  3. Discourses of relations and relational

    NARCIS (Netherlands)

    Hosking, D.M.

    2006-01-01

    This is a story of relations and relating. There is no wolf, no Little Red Riding Hood; there are no bears, nor little piggies. It is not a heroic tale of how one particular discourse proves its superiority by vanquishing other discourses; it is not a tale told from behind the wings, the

  4. Relational diversity.

    Science.gov (United States)

    Gregorius, Hans-Rolf

    2009-03-07

    In biology, the measurement of diversity traditionally focusses on reporting number of unambiguously distinguishable types, thus referring to qualitative (discontinuously varying) traits. Inclusion of frequencies or other weights has produced a large variety of diversity indices. Quantitative (continuously varying) traits do not readily fit into this perspective. In fact, in the context of quantitative traits, the concept of diversity is not always clearly distinguished from the (statistical) notion of dispersion. In many cases the ambiguity even extends to qualitative traits. This is at variance with the broad spectrum of diversity issues ranging, e.g., from ecological and genetic aspects of diversity to functional, structural, systematic, or evolutionary (including phylogenetic) aspects. In view of the urgent need for a more consistent perspective, it is called to attention that all of these aspects, whether of qualitative or quantitative nature, can be gathered under the common roof of binary relations (for qualitative traits two objects are related, for example, if they share the same trait state). A comprehensive concept of (relational) diversity can be developed in two steps: (1) determine the number of unrelated pairs of objects among all admissible pairs as a measure of implicit (relative) diversity, (2) invoke the concept of effective number to transform the implicit measure of diversity into an explicit (absolute) measure. The transformation operates by equating the observed implicit diversity to the implicit diversity obtained for the ideal model of an equivalence relation with classes of equal size. The number of these classes specifies the effective number as an explicit measure of diversity. The wealth of problems that can be treated from this unified perspective is briefly addressed by classifying and interpreting established diversity indices in the light of relational diversity. Desirable applications to the above-mentioned aspects are specified

  5. Relational Leading

    DEFF Research Database (Denmark)

    Larsen, Mette Vinther; Rasmussen, Jørgen Gulddahl

    2015-01-01

    This first chapter presents the exploratory and curious approach to leading as relational processes – an approach that pervades the entire book. We explore leading from a perspective that emphasises the unpredictable challenges and triviality of everyday life, which we consider an interesting......, relevant and realistic way to examine leading. The chapter brings up a number of concepts and contexts as formulated by researchers within the field, and in this way seeks to construct a first understanding of relational leading....

  6. Linguistic relativity.

    Science.gov (United States)

    Wolff, Phillip; Holmes, Kevin J

    2011-05-01

    The central question in research on linguistic relativity, or the Whorfian hypothesis, is whether people who speak different languages think differently. The recent resurgence of research on this question can be attributed, in part, to new insights about the ways in which language might impact thought. We identify seven categories of hypotheses about the possible effects of language on thought across a wide range of domains, including motion, color, spatial relations, number, and false belief understanding. While we do not find support for the idea that language determines the basic categories of thought or that it overwrites preexisting conceptual distinctions, we do find support for the proposal that language can make some distinctions difficult to avoid, as well as for the proposal that language can augment certain types of thinking. Further, we highlight recent evidence suggesting that language may induce a relatively schematic mode of thinking. Although the literature on linguistic relativity remains contentious, there is growing support for the view that language has a profound effect on thought. WIREs Cogni Sci 2011 2 253-265 DOI: 10.1002/wcs.104 For further resources related to this article, please visit the WIREs website. Copyright © 2010 John Wiley & Sons, Ltd.

  7. Weak relativity

    CERN Document Server

    Selleri, Franco

    2015-01-01

    Weak Relativity is an equivalent theory to Special Relativity according to Reichenbach’s definition, where the parameter epsilon equals to 0. It formulates a Neo-Lorentzian approach by replacing the Lorentz transformations with a new set named “Inertial Transformations”, thus explaining the Sagnac effect, the twin paradox and the trip from the future to the past in an easy and elegant way. The cosmic microwave background is suggested as a possible privileged reference system. Most importantly, being a theory based on experimental proofs, rather than mutual consensus, it offers a physical description of reality independent of the human observation.

  8. General Relativity

    CERN Document Server

    Straumann, Norbert

    2013-01-01

    This book provides a completely revised and expanded version of the previous classic edition ‘General Relativity and Relativistic Astrophysics’. In Part I the foundations of general relativity are thoroughly developed, while Part II is devoted to tests of general relativity and many of its applications. Binary pulsars – our best laboratories for general relativity – are studied in considerable detail. An introduction to gravitational lensing theory is included as well, so as to make the current literature on the subject accessible to readers. Considerable attention is devoted to the study of compact objects, especially to black holes. This includes a detailed derivation of the Kerr solution, Israel’s proof of his uniqueness theorem, and a derivation of the basic laws of black hole physics. Part II ends with Witten’s proof of the positive energy theorem, which is presented in detail, together with the required tools on spin structures and spinor analysis. In Part III, all of the differential geomet...

  9. Training Relations

    DEFF Research Database (Denmark)

    Smith, Aja

    contribution of the thesis is to illustrate the analytical and ethical importance of rendering these sensorial, bodily and affective dimensions of phenomena sensible. The thesis also contributes to the charting of Denmark ethnographically, sketching the relations between perceptions of “proper sociality...

  10. Readable relativity

    CERN Document Server

    Durell, Clement V

    2003-01-01

    Concise and practical, this text by a renowned teacher sketches the mathematical background essential to understanding the fundamentals of relativity theory. Subjects include the velocity of light, measurement of time and distance, and properties of mass and momentum, with numerous diagrams, formulas, and examples, plus exercises and solutions. 1960 edition.

  11. Readable relativity

    CERN Document Server

    Durell, Clement V

    1962-01-01

    Concise and practical, this text by a renowned teacher sketches the mathematical background essential to understanding the fundamentals of relativity theory. Subjects include the velocity of light, measurement of time and distance, and properties of mass and momentum, with numerous diagrams, formulas, and examples, plus exercises and solutions. 1960 edition.

  12. International Relations:

    DEFF Research Database (Denmark)

    This is the textbook for the Open University module International Relations: Continuity and Change in Global Politics. Instead of leading with a succession of theoretical 'isms', the module structures its presentation of the subject around six teaching ‘blocks’, each of which explores a dilemma......, or dimension of variation. The dilemmas in question were chosen for the way they capture key themes in the field of International Studies (IR) as well as central aspects of the ‘international’ itself (ir). The six Blocks are: • Block 1: Co-operation or conflict? Introducing international relations • Block 2......: Flat or uneven? Change and transformation in the international system • Block 3: Just or unjust? Intervention and inequality in the international system • Block 4: Top-down or bottom-up? Governance in the international system • Block 5: Secure or insecure? Pursuing security in the international system...

  13. Distant Relations

    DEFF Research Database (Denmark)

    Søndergaard, Morten

    2011-01-01

    Art EntrepreneurshipIvo Zander Mikael Scherdin This project is funded and sponsored by the Knowledge Foundation, the Bank of Sweden Tercentenary Foundation, and the Department of Business Studies, Uppsala University2008-2009This cutting edge project asks what art and artistic processes can contri......) Entrepreneurship on the art arena - An ecological perspective (Mikael Scherdin and Ivo Zander) Distant relations - Art practice in a global culture (Morten Søndergaard) Art entrepreneurship - A commentary (Daved Barry) Summary and policy implications (Mikael Scherdin and Ivo Zander)...

  14. Basic relativity

    CERN Document Server

    Mould, Richard A

    1994-01-01

    This comprehensive textbook develops in a logical and coherent way both the formalism and the physical ideas of special and general relativity. Part one focuses on the special theory and begins with the study of relativistic kinematics from three points of view. Part two begins with a chapter introducing differential geometry. Subsequent chapters cover: rotation, the electromagnetic field, and material media. A second chapter on differential geometry provides the background for Einstein's gravitational-field equation and Schwarzschild's solution. The book is aimed at advanced undergraduates and beginning graduate students in physics or astrophysics.

  15. General Relativity

    CERN Document Server

    Canuto, V

    2015-01-01

    This is an English translation of the Italian version of an encyclopedia chapter that appeared in the Italian Encyclopedia of the Physical Sciences, edited by Bruno Bertotti (1994). Following requests from colleagues we have decided to make it available to a more general readership. We present the motivation for constructing General Relativity, provide a short discussion of tensor algebra, and follow the set up of Einstein equations. We discuss briefly the initial value problem, the linear approximation and how should non gravitational physics be described in curved spacetime.

  16. Special relativity

    CERN Document Server

    Faraoni, Valerio

    2013-01-01

    This book offers an essential bridge between college-level introductions and advanced graduate-level books on special relativity. It begins at an elementary level, presenting and discussing the basic concepts normally covered in college-level works, including the Lorentz transformation. Subsequent chapters introduce the four-dimensional worldview implied by the Lorentz transformations, mixing time and space coordinates, before continuing on to the formalism of tensors, a topic usually avoided in lower-level courses. The book’s second half addresses a number of essential points, including the concept of causality; the equivalence between mass and energy, including applications; relativistic optics; and measurements and matter in Minkowski spacetime. The closing chapters focus on the energy-momentum tensor of a continuous distribution of mass-energy and its covariant conservation; angular momentum; a discussion of the scalar field of perfect fluids and the Maxwell field; and general coordinates. Every chapter...

  17. General Relativity

    CERN Document Server

    Khriplovich, I. B

    2005-01-01

    This book offers an alternative to other textbooks on the subject, providing a more specific discussion of numerous general relativistic effects for readers who have knowledge of classical mechanics and electrodynamics, including special relativity. Coverage includes gravitational lensing, signal retardation in the gravitational field of the Sun, the Reissner-Nordström solution, selected spin effects, the resonance transformation of an electromagnetic wave into a gravitational one, and the entropy and temperature of black holes. The book includes numerous problems at various levels of difficulty, making it ideal also for independent study by a broad readership of advanced students and researchers. I.B. Khriplovich is Chief Researcher, Budker Institute of Nuclear Physics, Novosibirsk, and Chair of Theoretical Physics at Novosibirsk University. Dr. Khriplovich is a Corresponding Member of the Russian Academy of Sciences. He has been awarded the Dirac Medal ``For the advancement of theoretical physics'' by Univ...

  18. Numerical relativity

    CERN Document Server

    Nakamura, T

    1993-01-01

    In GR13 we heard many reports on recent. progress as well as future plans of detection of gravitational waves. According to these reports (see the report of the workshop on the detection of gravitational waves by Paik in this volume), it is highly probable that the sensitivity of detectors such as laser interferometers and ultra low temperature resonant bars will reach the level of h ~ 10—21 by 1998. in this level we may expect the detection of the gravitational waves from astrophysical sources such as coalescing binary neutron stars once a year or so. Therefore the progress in numerical relativity is urgently required to predict the wave pattern and amplitude of the gravitational waves from realistic astrophysical sources. The time left for numerical relativists is only six years or so although there are so many difficulties in principle as well as in practice.

  19. San Felices de los Gallegos (Salamanca: análisis estratigráfico de la Cerca Vieja

    Directory of Open Access Journals (Sweden)

    Luis SERRANO PIEDECASAS

    2009-12-01

    Full Text Available San Felices de los Gallegos es un pueblo alejado, confín geográfico de la provincia, e injustamente olvidado de cualquier promoción institucional, dado el interés geográfico de la comarca y el valor arquitectónico de su núcleo urbano. Más conocido que por su interesantísima arquitectura popular1, San Felices lo es por su castillo, palimpsesto de defensas ha sido llamado, y como tal domina y abarcaba a todo el caserío. La población de San Felices de los Gallegos ha sido considerada históricamente como defensa avanzada, junto con la plaza de Ciudad Rodrigo, de la diócesis Mirobrigense frente al Reino de Portugal. Su nombre dícese fue impuesto por el obispo de Oporto, D. Félix XI, se supone que a una población ya existente, corriendo el año 690. De historia tan disputada frente al vecino reino da fe su conquista por el rey portugués don Dionís en 12962, monarca al que se atribuye también la erección de la fortaleza.

  20. Nuevas organizaciones ¿viejas tradiciones? : La conformación de la CELAC en un escenario complejo

    OpenAIRE

    Mesa, María Lorena Rodriguez de

    2012-01-01

    El agotamiento del modelo de regionalismo abierto que primó en la década del ’90 en América Latina y el Caribe, ha llevado a la conformación de una nueva etapa en lo referente a integración regional, caracterizada por la exclusión explícita de Estados Unidos y el resurgimiento de las ideas panamericanistas. La CELAC se anuncia como la organización que pretende desplazar a la ineficaz OEA y dar respuestas a las situaciones que se presentan en la región. El objeto del siguiente trabajo es an...

  1. Biología reproductiva del Potoyunco peruano Pelecanoides Garnotii en isla La Vieja, Costa Central del Perú

    OpenAIRE

    Jahncke, Jaime; Goya, Elisa

    1998-01-01

    Se encontraron adultos reproductivos durante todo el año; sin embargo, se identificaron dos picos reproductivos. El primero, más sincrónico, ocurre en los meses de verano entre diciembre y marzo; el segundo, menos marcado, ocurre en invierno entre mayo y setiembre. La duración del período de incubación se ha estimado en 50 a 60 días. Los pichones que nacen requieren de 70 a 80 días para completar el desarrollo. Se observaron tasas de crecimiento mayores durante los meses de invierno, debido p...

  2. Líderes latinoamericanos en Twitter. Viejas costumbres para nuevos medios en tiempos de crisis políticas

    Directory of Open Access Journals (Sweden)

    F Segado-Boj

    2016-02-01

    Full Text Available Introducción. Twitter representa un canal cada vez más importante para la comunicación política, aunque los estudios sobre su uso se han centrado casi exclusivamente en su empleo dentro de un marco cronológico marcado por las campañas electorales. Objetivos. Este artículo aborda el uso de esta herramienta como vehículo para la comunicación por parte de los principales políticos hispanoamericanos. Metodología. Se aplica un análisis de contenido a 688 mensajes publicados por diez políticos durante dos periodos de tiempo diferenciados, uno de ellos marcado por la atención mediática prestada a un escándalo político. Se aplican criterios de tipo de mensaje y direccionalidad del discurso. Resultados y conclusiones. Se concluye que no existe todavía una estrategia común de uso de Twitter en momentos de crisis por parte de los distintos líderes políticos latinoamericanos en el Gobierno y la oposición.

  3. Nuevos lenguajes fílmicos en la vieja Europa: el cine social de los hermanos Dardenne

    Directory of Open Access Journals (Sweden)

    Margarita Campillo Díaz

    2013-04-01

    Full Text Available Las películas de los hermanos Dardenne son documentos vivos, poblados de perso-najes marginales y excluidos, que ofrecen enormes posibilidades para reflexionar desde múltiples espacios educativos. Su obra presenta un reconocido estilo personal autoral, tanto en la forma como en las historias que aborda, susceptible de análisis y profundización. Adentrarse en ella y bucear su estilo narrativo es el objetivo de este estudio. Para materializarlo se esboza, al inicio, la tradición europea creadora de nuevas formas de expresión fílmica a lo largo del siglo XX -desde el naturalismo poético francés hasta llegar al movimiento nórdico “Dogma 95”- para explorar, más detenidamente, a continuación la produc-ción de los directores belgas: siguiendo un planteamiento evolutivo que transita desde sus primeros trabajos que antecederán a “La promesa” (1996 hasta su último film, “El niño de la bicicleta”( 2011, en este texto se analizan las obras de ficción de los hermanos y el estilo característico que pre-domina en ellas. Planos cortos, que trans-miten su propia vida interior, y de larga duración para que se pueda seguir atentamente la acción, filmación continua-da en el mismo orden programado en el guión, ausencia de música intrusiva, imá-genes despojadas de toda clase de buenos sentimientos… el sello personal de los Dardenne abre cauces novedosos de expresión comunicativa tan poderosos como creativos.The movies of the Dardenne brothers are living documents filled with marginalized characters that offer a great opportunity to think and reflect from different educational perspectives. Their work has a very personal composition; for being ahead of its time and for the depth of its analysis. With this essay, we try to explore and dive deep in their narrative style. For that, we first draft their influences taken from the European tradition with its new ways of filmic expressions, throughout the XX century: from the poetic French naturalism to the Nordic movement “Dogma 95”, to explore in bigger detail, after that, the influence of the productions of Belgian directors: all of these following an evolutionary approach that goes from their first movies before “La promesse” (1996, to their last film, “The kid with a bike” ( 2011,in this text, we analyze their fictional tales and their characteristic style. Close ups that describe an inner life and long shots to attend to the events in detail. The filming is always done in the order planned in the screenplay, there is always a lack of intrusive music, images without any kind of good feelings...the style of the Dardenne brothers which is an open door to new communicative styles, all of them powerful and creative.

  4. La puesta en escena del relato televisivo en la sociedad del espectáculo. Viejas y nuevas narrativas audiovisuales

    OpenAIRE

    Gallego Santos, María del Camino

    2015-01-01

    [ES]La tesis que se presenta pertenece a la modalidad de Tesis por compendio de artículos. Esta tesis corresponde a un compendio de trabajos previamente publicados en diferentes revistas de investigación, congresos de comunicación y artículos publicados en libros, avalando de esta manera la trayectoria investigadora durante los años posteriores a la formación académica. Los artículos que se incorporan a esta Tesis Doctoral representan líneas de investigación complementarias centradas, por ...

  5. Non ay tales maestras como estas viejas troyas (Libro de Buen Amor, 699c y 937c)

    OpenAIRE

    Casas Rigall, Juan

    2012-01-01

    Chercheurs et éditeurs du Libro de Buen Amor discutent l’interprétation du mot troya(s), attribué à Trotaconventos et aux entremetteuses (699c et 937c), et peut-être à une serrana (972b). Après une évaluation de ces théories, l’auteur présente une nouvelle hypothèse: comprendre troya comme un jeu de mots dilogique, avec les sens ‘sale, immorale, putain’ et ‘machine militaire, catapulte’. Estudiosos y editores del Libro de Buen Amor discrepan en la interpretación de la palabra troya(s), atr...

  6. APEC 2004: "viejas" y nuevas dinámicas de apertura económica transpacífica

    National Research Council Canada - National Science Library

    Hernán Gutiérrez B

    2004-01-01

    En 2004, el foro de Cooperación Económica de Asia-Pacífico o APEC, según su sigla en inglés, cumplirá 15 años desde que fue creado en Canberra, como resultado de los esfuerzos de australianos y japoneses por impedir el quiebre...

  7. La arqueologia urbana en América Latina: el caso de Habana Vieja, ciudad arquelógica

    OpenAIRE

    Domínguez, Lourdes; Pontifícia Universidade Católica do Rio Grande do Sul, RS; Pedro Paulo A Funari

    2002-01-01

    The paper starts by introducing urban archaeology as a Latin American sub­ject. We then oppose Portuguese and Spanish towns as two different approaches to city life. Spanish cities were planned, in Renaissance style, as chequered blocks, while Por­tuguese ones continued in the Medieval wrinkled style. We then turn our attention to the old quarters of Havana, Cuba, and produce a brief introduction to the archaelogy of this world heritage site. The paper starts by introducing urban archaeolo...

  8. La arquitectura religiosa del periodo colonial temprano en Piura la Vieja, La Matanza (Piura, Perú)

    OpenAIRE

    Vela Cossio, Fernando Julio; Abril Urmente, Luis Fernando; García Hermida, Alejandro

    2014-01-01

    Trabajo de investigación presentado en el seminario internacional organizado por la Red Iberoamericana de Investigación del Urbanismo Colonial, con el apoyo de la Escuela Técnica Superior de Arquitectura de la UPM, la Casa de Velázquez (Escuela de Altos Estudios Hispánicos e Ibéricos) y el Museo de América (Madrid).

  9. Social relations: network, support and relational strain

    DEFF Research Database (Denmark)

    Due, P; Holstein, B; Lund, Rikke

    1999-01-01

    We introduce a conceptual framework with social relations as the main concept and the structure and the function of social relations as subconcepts. The structure of social relations covers aspects of formal relations and social network. The function of social relations covers social support......,011. The postal questionnaires were answered by a random sample in each of the age groups. The results show marked age and gender differences in both the structure and the function of social relations. The social network, measured as weekly contacts, weakens with age and so does instrumental support. Emotional...... support is unrelated to this decline in contact frequency and appears to be at the same level for younger and older individuals. Relational strain, measured as conflicts, declines with age for all kinds of social relations. The weakening of the social network with age does not seem to affect the level...

  10. Incorporating Relation Paths in Neural Relation Extraction

    OpenAIRE

    Zeng, Wenyuan; Lin, Yankai; Liu, Zhiyuan; Sun, Maosong

    2016-01-01

    Distantly supervised relation extraction has been widely used to find novel relational facts from plain text. To predict the relation between a pair of two target entities, existing methods solely rely on those direct sentences containing both entities. In fact, there are also many sentences containing only one of the target entities, which provide rich and useful information for relation extraction. To address this issue, we build inference chains between two target entities via intermediate...

  11. Social relations: network, support and relational strain.

    Science.gov (United States)

    Due, P; Holstein, B; Lund, R; Modvig, J; Avlund, K

    1999-03-01

    We introduce a conceptual framework with social relations as the main concept and the structure and the function of social relations as subconcepts. The structure of social relations covers aspects of formal relations and social network. The function of social relations covers social support, social anchorage and relational strain. We use this conceptual framework to describe social relations in the Danish population, with questionnaire data from the Danish Longitudinal Health Behaviour Study including a random sample of each of the age groups 25-, 50-, 60-and 70-year olds, N = 2,011. The postal questionnaires were answered by a random sample in each of the age groups. The results show marked age and gender differences in both the structure and the function of social relations. The social network, measured as weekly contacts, weakens with age and so does instrumental support. Emotional support is unrelated to this decline in contact frequency and appears to be at the same level for younger and older individuals. Relational strain, measured as conflicts, declines with age for all kinds of social relations. The weakening of the social network with age does not seem to affect the level of emotional support and in turn seems to be partly compensated for by a simultaneous decline in relational strain.

  12. Tests Related to Pregnancy

    Science.gov (United States)

    ... what you want to learn. Search form Search Tests related to pregnancy You are here Home Testing & Services Testing for ... Genes: A Guide to Genetic Counseling . What Are Tests Related to Pregnancy? Pregnancy related testing is done before or during ...

  13. Prédiction de l'évolution spatio-temporelle du fer à l'exutoire d'un ...

    African Journals Online (AJOL)

    Thus, the use of this hybrid model is satisfactory. It can be used for any studies to rational management, protection and sustainable development of the Sassandra River and the Atlantic Ocean near to Sassandra outfall. © 2016 International Formulae Group. All rights reserved. Keywords: Atlantic Ocean, metal pollution, ...

  14. "Liberalisation du marche cerealier au Burkina Faso." Une analyse neo-institionelle de son organisation et de son efficacite temporelle et spatiale.

    NARCIS (Netherlands)

    Bassolé, Boebie Toussaint

    2000-01-01

    Cette étude a pour objectif d'analyser la réaction des marchés céréaliers ou du système de commercialisation des céréales et évaluer sa performance dans cet environnement libéral. Plus precisement, il s'agit d'analyser l'évolution de la structure du marché céréalier et le comportement des acteurs

  15. Caractéristiques temporelles et endocriniennes de la puberté et du cycle oestral chez la chèvre locale

    Directory of Open Access Journals (Sweden)

    Aïssata Wereme

    1998-01-01

    Full Text Available Temporal and hormonal characteristics of puberty and oestrous cycle in a local goat breed (Mossi of Burkina Faso.Age at puberty, duration of sequences in oestrous cycle and timespan of heat, and sex hormone (FSH, LH and E17Beta levels in blood plasma were studied in local Mossi goats. The study was designed to provide the tools for an improved mating management of this breed in its natural eco-climatic environment. For heat detection, harnassed bucks without markers were put into female paddocks three times a day, and were continuously observed by a trained technicien. Sex hormones in blood plasma were analysed using radioimmunoassay (RIA. There were Ovide individuel variations in plasma FSH and E-17Beta levels. Apparent age at puberty (AAP was observed around 7.5 months, but actuel AAP as shown by the first ovulation in reproductive life was six months. Mean duration of estrus cycle was 21 ± 6 days, characterized by two main sequences: a follicular phase lasting about three days, followed by an 18 day luteal phase. Visible signs of estrus lasted 20 ± 2 hours. Preovulatory LH peak surge (50 to 302 ng/ml blood plasma depending on animais occurred between the 14th and the 22nd hour following the beginning of heat signs. This indicates that the best time for artificial or natural insemination of Mossi goat does fall between the 26th and the 34th hour after the first signs of heat

  16. Évolution temporelle des agrégats créés par impulsions laser courtes : évaporation et condensation

    Science.gov (United States)

    Gouriet, K.; Itina, T. E.; Zhigilei, L. V.

    2006-12-01

    L'étude numérique du comportement d'un panache gazeux et d'un nano-agrégat créés lors l'ablation laser par impulsions courtes est étudiée par la méthode de dynamique moléculaire. Lors de l'évolution d'une nanoparticule, deux phénomènes coexistent: l'agglomération (ou agrégation) et l'évaporation. La température seuil de la nanoparticule à partir de laquelle l'évaporation prédomine est ainsi déterminée. La présence du panache gazeux modifie ce comportement. D'autre part la condensation de ce gaz est un paramètre non négligeable dans la poursuite de cette étude.

  17. Modélisation de répartitions d'occurrences spatio-temporelles et épidémiologie végétale

    OpenAIRE

    Chimard, Florencia; Vaillant, Jean; Daugrois, Jean-Heinrich

    2010-01-01

    Les processus ponctuels temporel, spatial et spatio-temporel sont utilisés depuis un certain nombre d'années dans des domaines tels que la biologie, l'épidémiologie, la sismologie, la neurologie afin de modéliser des séries d'occurrences d'événements. Notre étude concerne l'apport des modèles de mélange de processus ponctuels dans de telles modélisations. Elle fait également apparaître l'utilité de l'approche bayésienne pour apprécier la variabilité associée à certains facteurs environnementa...

  18. Correction of spectral and temporal phases for ultra-intense lasers; Correction des phases spectrale et temporelle pour les lasers ultra-intenses

    Energy Technology Data Exchange (ETDEWEB)

    Salmon, E

    2000-12-15

    The discovery of new regimes of interaction between laser and matter requires to produce laser pulses presenting higher luminous flux density. The only solutions that allow us to reach important power (about ten peta-watts) imply the correction of non-linear effects before compressing the laser pulse so that we do not transfer the phase modulation to the amplitude modulation. The aim of this work is the correction of the spectral phase through the modulation of the temporal phase. The first chapter is dedicated to the review of the physical phenomena involved in the interaction of ultra-intense laser pulse with matter. The peta-watt laser operating on the LIL (integrated laser line), the prototype line of the Megajoule Laser, is described in the second chapter. The third chapter presents the method used and optimized for getting an absolute measurement of the spectral phase in our experimental configuration. The fourth chapter details the analogy existing between the spatial domain and the temporal domain particularly between diffraction and dispersion. This analogy has allowed us to benefit from the knowledge cumulated in the spatial domain, particularly the treatment of the aberrations and their impact on the focal spot and to use it in the temporal domain. The principle of the phase correction is exposed in the fifth chapter. We have formalized the correspondence of the phase modulation between temporal domain and the spectral domain for strongly stretched pulses. In this way a modulation of the temporal phase is turned into a modulation of the spectral phase. All the measurements concerning phases and modulation spectral phase correction are presented in the sixth chapter. In the last chapter we propose an extension of the temporal phase correction by correcting non-linear effects directly in the temporal phase. This correction will improve the performances of the peta-watt laser. Numerical simulations show that the temporal phase correction can lead to a factor 3 improvement for the power in a LIL-type installation. (A.C.)

  19. Variations temporelle et spatiale de la transition subduction-collision. Tectonique de la transition Zagros-Makran (Iran) et modélisation analogique

    OpenAIRE

    Regard, Vincent

    2003-01-01

    M. Olivier BELLIER, Directeur de thèse, Université Aix-Marseille III M. Claudio FACCENNA, Codirecteur de thèse, Università Roma Tre, Italie M. Denis HATZFELD, Rapporteur, LGIT, Grenoble M. James JACKSON, Examinateur, University of Cambridge, R.U. M. Serge LALLEMAND, Examinateur, Université Montpellier II M. Xavier LE PICHON, Président, Examinateur, Collège de France M. Joseph MARTINOD, Codirecteur de thèse, Université Toulouse P. Sabatier M. Gianluca VALENSISE, Rapporteur, INGV Roma, Italie; ...

  20. Corrélations de vitesse lagrangienne et échelle intégrale temporelle en simulation des grandes échelles

    Science.gov (United States)

    Wei, Guoxin; Vinkovic, Ivana; Shao, Liang; Simoëns, Serge

    2006-05-01

    Velocity correlations and Lagrangian timescales are studied numerically by means of a direct numerical simulation (DNS) and a large-eddy simulation (LES) coupled with a subgrid Lagrangian stochastic model, in the case of a homogeneous and isotropic turbulence. A Langevin model is used to determine the subgrid component of the velocity of fluid particles. Numerical results of Lagrangian velocity correlations and timescales are presented. These quantities play an important role in turbulent mixing and scalar dispersion. To cite this article: G. Wei et al., C. R. Mecanique 334 (2006).

  1. Prédiction de l'évolution spatio-temporelle du fer à l'exutoire d'un ...

    African Journals Online (AJOL)

    Mots clés : ACP, modèle « ACP-PMC », océan Atlantique, pollution métallique, PMC. Prediction of the spatial and temporal ... Keywords: Atlantic Ocean, metal pollution, model "PCA-MLP ", MLP, PCA. INTRODUCTION. La protection et la ...... cyanobacteria bloom in Dianchi Lake. Int. Soc. Environ. Inf. Sci. 2010. Annual.

  2. Supervision en ligne de propriétés temporelles dans les systèmes distribués temps-réel

    OpenAIRE

    Baldellon, Olivier

    2014-01-01

    Les systèmes actuels deviennent chaque jour de plus en plus complexe; à la distribution s’ajoutent les contraintes temps réel. Les méthodes classiques en charge de garantir la sûreté de fonctionnement, comme le test, l’injection de fautes ou les méthodes formelles ne sont plus suffisantes à elles seules. Afin de pouvoir traiter les éventuelles erreurs lors de leur apparition dans un système distribué donné, nous désirons mettre en place un programme, surveillant ce système, capable de lancer ...

  3. Understanding Causal Coherence Relations

    NARCIS (Netherlands)

    Mulder, G.

    2008-01-01

    The research reported in this dissertation focuses on the cognitive processes and representations involved in understanding causal coherence relations in text. Coherence relations are the meaning relations between the information units in the text, such as Cause-Consequence. These relations can be

  4. Introduction to relation algebras relation algebras

    CERN Document Server

    Givant, Steven

    2017-01-01

    The first volume of a pair that charts relation algebras from novice to expert level, this text offers a comprehensive grounding for readers new to the topic. Upon completing this introduction, mathematics students may delve into areas of active research by progressing to the second volume, Advanced Topics in Relation Algebras; computer scientists, philosophers, and beyond will be equipped to apply these tools in their own field. The careful presentation establishes first the arithmetic of relation algebras, providing ample motivation and examples, then proceeds primarily on the basis of algebraic constructions: subalgebras, homomorphisms, quotient algebras, and direct products. Each chapter ends with a historical section and a substantial number of exercises. The only formal prerequisite is a background in abstract algebra and some mathematical maturity, though the reader will also benefit from familiarity with Boolean algebra and naïve set theory. The measured pace and outstanding clarity are particularly ...

  5. The Fundamental Property Relation.

    Science.gov (United States)

    Martin, Joseph J.

    1983-01-01

    Discusses a basic equation in thermodynamics (the fundamental property relation), focusing on a logical approach to the development of the relation where effects other than thermal, compression, and exchange of matter with the surroundings are considered. Also demonstrates erroneous treatments of the relation in three well-known textbooks. (JN)

  6. Matrix relation algebras

    NARCIS (Netherlands)

    el Bachraoui, M.; van de Vel, M.L.J.

    2002-01-01

    Square matrices over a relation algebra are relation algebras in a natural way. We show that for fixed n, these algebras can be characterized as reducts of some richer kind of algebra. Hence for fixed n, the class of n × n matrix relation algebras has a first-order characterization. As a

  7. Relativity and cosmology

    CERN Document Server

    Kaufmann, William J

    1973-01-01

    The foundations of gravitational theory ; the birth of relativity theory ; the foundations of general relativity ; experimental tests of relativity ; the meaning of the redshift ; the black hole ; wormholes and white holes ; galaxies and quasars ; gravitational waves ; the shape of the Universe ; the creation of the Universe.

  8. A Bigraph Relational Model

    DEFF Research Database (Denmark)

    Beauquier, Maxime; Schürmann, Carsten

    2011-01-01

    In this paper, we present a model based on relations for bigraphical reactive system [Milner09]. Its defining characteristics are that validity and reaction relations are captured as traces in a multi-set rewriting system. The relational model is derived from Milner's graphical definition...

  9. Space, Time and Relativity

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 7 ... General Article Volume 11 Issue 7 July 2006 pp 14-29 ... Galilean relativity; inertial frames; Newtonian mechanics; Maxwell electromagnetism; special relativity; non Euclidean geometry; principle of equiva ence; general relativity; absolute ...

  10. Bellman goes Relational

    NARCIS (Netherlands)

    Kersting, Kristian; van Otterlo, M.; De Raedt, Luc; Greiner, R.; Schuurmans, D.

    2004-01-01

    Motivated by the interest in relational reinforcement learning, we introduce a novel relational Bellman update operator called ReBel. It employs a constraint logic programming language to compactly represent Markov decision processes over relational domains. Using ReBel, a novel value iteration

  11. Nothing but relativity

    Energy Technology Data Exchange (ETDEWEB)

    Pal, Palash B [Saha Institute of Nuclear Physics, 1/AF Bidhan-Nagar, Calcutta 700064 (India)

    2003-05-01

    We deduce the most general space-time transformation laws consistent with the principle of relativity. Thus, our result contains the results of both Galilean and Einsteinian relativity. The velocity addition law comes as a by-product of this analysis. We also argue why Galilean and Einsteinian versions are the only possible embodiments of the principle of relativity.

  12. Making relative survival analysis relatively easy.

    Science.gov (United States)

    Pohar, Maja; Stare, Janez

    2007-12-01

    In survival analysis we are interested in time from the beginning of an observation until certain event (death, relapse, etc.). We assume that the final event is well defined, so that we are never in doubt whether the final event has occurred or not. In practice this is not always true. If we are interested in cause-specific deaths, then it may sometimes be difficult or even impossible to establish the cause of death, or there may be different causes of death, making it impossible to assign death to just one cause. Suicides of terminal cancer patients are a typical example. In such cases, standard survival techniques cannot be used for estimation of mortality due to a certain cause. The cure to the problem are relative survival techniques which compare the survival experience in a study cohort to the one expected should they follow the background population mortality rates. This enables the estimation of the proportion of deaths due to a certain cause. In this paper, we briefly review some of the techniques to model relative survival, and outline a new fitting method for the additive model, which solves the problem of dependency of the parameter estimation on the assumption about the baseline excess hazard. We then direct the reader's attention to our R package relsurv that provides functions for easy and flexible fitting of all the commonly used relative survival regression models. The basic features of the package have been described in detail elsewhere, but here we additionally explain the usage of the new fitting method and the interface for using population mortality data freely available on the Internet. The combination of the package and the data sets provides a powerful informational tool in the hands of a skilled statistician/informatician.

  13. Decreasing Relative Risk Premium

    DEFF Research Database (Denmark)

    Hansen, Frank

    We consider the risk premium demanded by a decision maker with wealth x in order to be indifferent between obtaining a new level of wealth y1 with certainty, or to participate in a lottery which either results in unchanged present wealth or a level of wealth y2 > y1. We define the relative risk...... premium as the quotient between the risk premium and the increase in wealth y1–x which the decision maker puts on the line by choosing the lottery in place of receiving y1 with certainty. We study preferences such that the relative risk premium is a decreasing function of present wealth, and we determine...... relative risk premium in the small implies decreasing relative risk premium in the large, and decreasing relative risk premium everywhere implies risk aversion. We finally show that preferences with decreasing relative risk premium may be equivalently expressed in terms of certain preferences on risky...

  14. RELATED PARTY TRANSACTIONS - OVERVIEW

    OpenAIRE

    Alexandra Corlaciu; Adriana Tiron Tudor

    2011-01-01

    The purpose of the present investigation is to provide a short overview of themain implications arising from carrying related parties transactions: accounting reporting(related party disclosures - IAS 24), auditing (audit procedures for related partytransactions), taxation (issues regarding the transfer prices used for intra-grouptransactions). Although this research does not identify a problem with the scope to solve ithowever the utility might be observed by its contribution to the future d...

  15. Object relational mapping frameworks

    OpenAIRE

    Patrný, Vojtěch

    2008-01-01

    This paper is about Java object relational frameworks and related processes. The goal of this work consists of showing design patterns for ORM, introducing Java ORM standards along with the main implementations, finding criteria for comparison of ORM frameworks and showing working ORM example in a case study. This paper has the following structure: The first part of this paper discusses main ORM design patters, approaches to ORM and performance related features of Java ORM frameworks. Next pa...

  16. Gravitation and relativity

    CERN Document Server

    Bowler, Michael George

    1976-01-01

    Gravitation and Relativity generalizes Isaac Newton's theory of gravitation using the elementary tools of Albert Einstein's special relativity. Topics covered include gravitational waves, martian electrodynamics, relativistic gravitational fields and gravitational forces, the distortion of reference frames, and the precession of the perihelion of Mercury. Black holes and the geometry of spacetime also receive consideration. This book is comprised of 10 chapters; the first of which briefly reviews special relativity, with the emphasis on the Lorentz covariance of the equations of physics. This

  17. Reconstructing relational information.

    Science.gov (United States)

    Horecka, Kevin M; Dulas, Michael R; Schwarb, Hillary; Lucas, Heather D; Duff, Melissa; Cohen, Neal J

    2018-02-01

    Hippocampal involvement in learning and remembering relational information has an extensive history, often focusing specifically on spatial information. In humans, spatial reconstruction (SR) paradigms are a powerful tool for evaluating an individuals' spatial-relational memory. In SR tasks, participants study locations of items in space and subsequently reconstruct the studied display after a short delay. Previous work has revealed that patients with hippocampal damage are impaired both in overall placement accuracy as well as on a specific measure of relational memory efficacy, "swaps" (i.e., when the relative location of two items is reversed). However, the necessity of the hippocampus for other types of spatial-relational information involved in reconstruction behaviors (e.g., where in the environment and relative to which other items an item was located) have not yet been investigated systematically. In this work, three patients with hippocampal damage and nine healthy matched comparison participants performed an SR task. An analysis framework was developed to independently assess three first-order types of relations: (1) memory for the binding of specific item identities to locations, (2) memory for arrangement of items in relation to each other or the environment bounds, regardless of memory for the item identity, and (3) higher-order, compound relational errors (i.e., errors involving multiple pieces of relational information). Reconstruction errors were evaluated to determine the degree to which patients and comparisons differed (or not) on each type of spatial-relational information. Data revealed that the primary group difference in performance was for identity-location information. However, when the locations of items were evaluated without regarding the identities, no group difference was found in the number of item placements to studied locations. The present work provides a principled approach to analysis of SR data and clarifies our understanding of

  18. Decreasing relative risk premium

    DEFF Research Database (Denmark)

    Hansen, Frank

    2007-01-01

    such that the corresponding relative risk premium is a decreasing function of present wealth, and we determine the set of associated utility functions. We find a new characterization of risk vulnerability and determine a large set of utility functions, closed under summation and composition, which are both risk vulnerable...... and have decreasing relative risk premium. We finally introduce the notion of partial risk neutral preferences on binary lotteries and show that partial risk neutrality is equivalent to preferences with decreasing relative risk premium...

  19. Relative Monads Formalised

    Directory of Open Access Journals (Sweden)

    Thorsten Altenkirch

    2014-07-01

    Full Text Available Relative monads are a generalisation of ordinary monads where the underlying functor need not be an endofunctor. In this paper, we describe a formalisation of the basic theory of relative monads in the interactive theorem prover and dependently typed programming language Agda. The formalisation comprises the requisite basic category theory, the central concepts of the theory of relative monads and adjunctions, which are compared to their ordinary counterparts, and two running examples from programming theory.

  20. Characteristic uncertainty relations

    Energy Technology Data Exchange (ETDEWEB)

    Trifonov, D.A.; Donev, S.G. [Institute for Nuclear Research and Nuclear Energetics, Sofia (Bulgaria)

    1998-10-02

    New uncertainty relations for n observables are established. The relations take the invariant form of inequalities between the characteristic coefficients of order r, r=1, 2,...,n, of the uncertainty matrix and the matrix of mean commutators of the observables. It is shown that the second- and third-order characteristic inequalities for the three generators of SU(1, 1) and SU(2) are minimized in the corresponding group-related coherent states with maximal symmetry. (author)

  1. Motion and relativity

    CERN Document Server

    Infeld, Leopold

    1960-01-01

    Motion and Relativity focuses on the methodologies, solutions, and approaches involved in the study of motion and relativity, including the general relativity theory, gravitation, and approximation.The publication first offers information on notation and gravitational interaction and the general theory of motion. Discussions focus on the notation of the general relativity theory, field values on the world-lines, general statement of the physical problem, Newton's theory of gravitation, and forms for the equation of motion of the second kind. The text then takes a look at the approximation meth

  2. Relative Lyapunov Center Bifurcations

    DEFF Research Database (Denmark)

    Wulff, Claudia; Schilder, Frank

    2014-01-01

    Relative equilibria (REs) and relative periodic orbits (RPOs) are ubiquitous in symmetric Hamiltonian systems and occur, for example, in celestial mechanics, molecular dynamics, and rigid body motion. REs are equilibria, and RPOs are periodic orbits of the symmetry reduced system. Relative Lyapunov...... center bifurcations are bifurcations of RPOs from REs corresponding to Lyapunov center bifurcations of the symmetry reduced dynamics. In this paper we first prove a relative Lyapunov center theorem by combining recent results on the persistence of RPOs in Hamiltonian systems with a symmetric Lyapunov...

  3. Gaining Relational Competitive Advantages

    DEFF Research Database (Denmark)

    Hu, Yimei; Zhang, Si; Li, Jizhen

    2015-01-01

    Establishing strategic technological partnerships (STPs) with foreign partners is an increasingly studied topic within the innovation management literature. Partnering firms can jointly create sources of relational competitive advantage. Chinese firms often lack research and development (R......&D) capabilities but are increasingly becoming preferred technological partners for transnational corporations. We investigate an STP between a Scandinavian and a Chinese firm and try to explore how to gain relational competitive advantage by focusing on its two essential stages: relational rent generation...... and appropriation. Based on an explorative case study, we develop a conceptual framework that consists of process, organizational alliance factors, and coordination modes that we propose lead to relational competitive advantage....

  4. Models as Relational Categories

    Science.gov (United States)

    Kokkonen, Tommi

    2017-10-01

    Model-based learning (MBL) has an established position within science education. It has been found to enhance conceptual understanding and provide a way for engaging students in authentic scientific activity. Despite ample research, few studies have examined the cognitive processes regarding learning scientific concepts within MBL. On the other hand, recent research within cognitive science has examined the learning of so-called relational categories. Relational categories are categories whose membership is determined on the basis of the common relational structure. In this theoretical paper, I argue that viewing models as relational categories provides a well-motivated cognitive basis for MBL. I discuss the different roles of models and modeling within MBL (using ready-made models, constructive modeling, and generative modeling) and discern the related cognitive aspects brought forward by the reinterpretation of models as relational categories. I will argue that relational knowledge is vital in learning novel models and in the transfer of learning. Moreover, relational knowledge underlies the coherent, hierarchical knowledge of experts. Lastly, I will examine how the format of external representations may affect the learning of models and the relevant relations. The nature of the learning mechanisms underlying students' mental representations of models is an interesting open question to be examined. Furthermore, the ways in which the expert-like knowledge develops and how to best support it is in need of more research. The discussion and conceptualization of models as relational categories allows discerning students' mental representations of models in terms of evolving relational structures in greater detail than previously done.

  5. Heat-Related Illnesses

    Science.gov (United States)

    ... this! Home » Emergency 101 Heat-Related Illnesses Dr. Glenn Mitchell , Emergency physician at Mercy Health System in Chesterfield, Missouri Heat-related illness can be caused by overexposure to the sun or any situation that involves extreme heat. Young children and the elderly are most at risk, ...

  6. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... this! Home » Emergency 101 Heat-Related Illnesses Dr. Glenn Mitchell , Emergency physician at Mercy Health System in Chesterfield, Missouri Heat-related illness can be caused by overexposure to the sun or any situation that involves extreme heat. Young children and the elderly are most at risk, ...

  7. relatives in Butajira, Ethiopia

    African Journals Online (AJOL)

    Perception of stigma in people with epilepsy and their relatives in Butajira, Ethiopia. Teshome Shibrel, Atalay Alem', Redda Tekle-Hai'manotz, Girmay Medhin3, Lars ,Jacobsson4. Abstract. Background: The occurrence of psychosocial problems related to epilepsy is well recognized and in certain situations could even be ...

  8. Relational Processing Following Stroke

    Science.gov (United States)

    Andrews, Glenda; Halford, Graeme S.; Shum, David; Maujean, Annick; Chappell, Mark; Birney, Damian

    2013-01-01

    The research examined relational processing following stroke. Stroke patients (14 with frontal, 30 with non-frontal lesions) and 41 matched controls completed four relational processing tasks: sentence comprehension, Latin square matrix completion, modified Dimensional Change Card Sorting, and n-back. Each task included items at two or three…

  9. Theory of relativity

    CERN Document Server

    Pauli, W

    1958-01-01

    This classic work offers a concise and comprehensive review of the literature on relativity as of 1921, along with the author's insightful update of later developments in relativity theory and coverage of subsequent controversies. Special attention is given to unified field theories. 1958 edition.

  10. Space, Time and Relativity

    Indian Academy of Sciences (India)

    Special Relativity is now a hundred years old, and Gen- eral Relativity is just ten years younger. Even the gen- eral literate public probably knows that these two the- ories of physics - STR and GTR - profoundly altered previous conceptions and understanding of space and time in physics. We will try to describe these ...

  11. Color Relationalism and Relativism.

    Science.gov (United States)

    Byrne, Alex; Hilbert, David R

    2017-01-01

    This paper critically examines color relationalism and color relativism, two theories of color that are allegedly supported by variation in normal human color vision. We mostly discuss color relationalism, defended at length in Jonathan Cohen's The Red and the Real, and argue that the theory has insuperable problems. Copyright © 2017 Cognitive Science Society, Inc.

  12. Quantum Fluctuation Relations

    OpenAIRE

    Facchi, Paolo; Garnero, Giancarlo; Ligabò, Marilena

    2017-01-01

    We present here a set of lecture notes on exact fluctuation relations. We prove the Jarzynski equality and the Crooks fluctuation theorem, two paradigmatic examples of classical fluctuation relations. Finally we consider their quantum versions, and analyze analogies and differences with the classical case.

  13. Destination: Alumni Relations

    Science.gov (United States)

    Scully, Maura King

    2010-01-01

    Increasingly today, with the growing and sophisticated skill set alumni professionals need to get the job done, alumni relations has become a destination career rather than a stop along the way. Modern alumni relations is "so much more than homecoming and punch-and-cookie receptions." It's marketing, volunteer management, and social networking. To…

  14. relatives in Butajira, Ethiopia

    African Journals Online (AJOL)

    Abstract. Background: The occurrence of psychosocial problems related to epilepsy is well recognized and in certain situations could even be more troublesome than the effect of the seizure disorders themselves. Objective: This study was conducted to assess the magnitude of stigma experienced by patients and relatives ...

  15. The Redshifts in Relativity

    Science.gov (United States)

    Singh, Satya Pal; Singh, Apoorva; Hareet, Prabhav

    2011-01-01

    The progress of modern cosmology took off in 1917 when A. Einstein published his paper on general theory of relativity extending his work of special theory of relativity (1905). In 1922 Alexander Friedmann constructed a mathematical model for expanding Universe that had a big bang in remote past. The experimental evidences could come in 1929 by…

  16. Forces in General Relativity

    Science.gov (United States)

    Ridgely, Charles T.

    2010-01-01

    Many textbooks dealing with general relativity do not demonstrate the derivation of forces in enough detail. The analyses presented herein demonstrate straightforward methods for computing forces by way of general relativity. Covariant divergence of the stress-energy-momentum tensor is used to derive a general expression of the force experienced…

  17. Reciprocal relations in electroacoustics.

    Science.gov (United States)

    Chassagne, C; Bedeaux, D

    2014-07-28

    In a colloidal suspension, one can generate sound waves by the application of an alternating electric field (Electrokinetic Sonic Amplitude, i.e., ESA). Another phenomenon is electrophoresis (Electrophoretic Mobility, i.e., EM) where a colloidal particle moves relative to the solvent in an electric field. Vice versa one can generate electric fields or electric currents by sound waves (Colloid Vibration Potential/Current, i.e., CVP/CVI). In 1988 and 1990, O'Brien [J. Fluid Mech. 190, 71-86 (1988) and O'Brien, J. Fluid Mech. 212, 81-93 (1990)] derived a reciprocal relation between the proportionality coefficients of the EM and CVI phenomena. In this paper, we will generalize his proof by constructing the relevant entropy production from which the linear force-flux relations follow. General relations are derived for electrolyte solutions, of which colloidal suspensions are a particular case. The relations between CVI, CVP, EM, and ESA are discussed. O'Brien's reciprocal relation then follows as an Onsager relation. The relation is valid for any applied electric field frequency, particle surface charge and particle concentration (even in the presence of particle-particle interactions) provided the system is isotropic.

  18. Antecedents of Relational Capital

    DEFF Research Database (Denmark)

    Nowinska, Agnieszka

    This paper merges economic geography and relational capital perspective in order to analyze the proximity-based antecedents of relational assets in brokerage. It investigates empirically the role and interplay of geographical and cognitive proximity between a broker and her buyers in a quantitative...... for buyers characteristics. Lastly, I make use the under-researched empirical field of brokers....

  19. Relational Perspectives on Leading

    DEFF Research Database (Denmark)

    Relational Perspectives on Leading discusses leadership from a relational and social constructionism perspective as practiced on an everyday basis between people. The book pursues a fast growing, practice-based approach - particularly within the Anglo-Saxon parts of the world - to organization...

  20. Relational Perspectives on Leading

    DEFF Research Database (Denmark)

    Larsen, Mette Vinther; Rasmussen, Jørgen Gulddahl

    2015-01-01

    Relational Perspectives on Leading discusses leadership from a relational and social constructionism perspective as practiced on an everyday basis between people. The book pursues a fast growing, practice-based approach - particularly within the Anglo-Saxon parts of the world - to organization...

  1. Journalism of Relation

    DEFF Research Database (Denmark)

    Blaagaard, Bolette

    of the self-other relation which is simultaneously personal and political. Secondly, the dissertation relates the phenomenological ‘race’ and gender debates to the societal and productive context of contemporary European and ‘western’ globalised and mediated culture and politics. Journalism is re...... of cosmopolitanism from universal reproductions of sameness into creative productions of singular self-other relations based on the practiced and productive journalism. This is substantiated through case study analyses. The aim is to challenge the modern, rational journalistic subject referring back to the unified...... accountability and relation from journalistic training and practices whereby a ‘white’ and homogeneous social imaginary is reproduced. I make a call for thinking about journalism as relation – in terms of technological mediations, but also in terms of subjectivities. In order to allow for this, a shift is needed...

  2. Modernization of credit relations

    Directory of Open Access Journals (Sweden)

    S.V. Volosovich

    2015-03-01

    Full Text Available Nowadays it is essential to modernize credit relations in the conditions of global economy transformations. This is due to the influence of integration processes on credit relations and transformation of the risks inherent in the credit field. The purpose of this article is to develop measures that help to improve the efficiency of interaction of credit relations’ participants. Modernization of credit relations is based on the interaction of its main and indirect subjects who belong to the subsystems of loans granting, deposits attraction and provision of related services. Its goal is to pass from extensive to intensive model of interaction between the subjects of credit relations. Components of the credit relations modernization are the following: institutional modernization, which is based on the interaction of credit relations’ subjects, and ensures the development of competition in all credit market’s segments, the creation of its corresponding infrastructure, qualitative change in the approaches of regulation and supervision; technological modernization, which involves the formation of joint products on the credit market and the formation of an integrated informational and analytical system. In the result of the credit relations’ modernization it is expected to achieve synergies between the subjects of credit relations, that will lead to changes in the business architecture of the financial market.

  3. Ether formulations of relativity

    Energy Technology Data Exchange (ETDEWEB)

    Duffy, M.C.

    1980-12-01

    Contemporary ether theories are surveyed and criticized, especially those formally identical to orthodox Relativity. The historical development of Relativity, Special and General, in terms of an ether, is briefly indicated. Classical interpretations of Generalized Relativity using ether are compared to Euclidean formulations using a background space. The history of a sub-group of theories, formulating a 'new' Relativity involving modified transforms, is outlined. According to the theory with which they agree, recent supposed detections of drift are classified and criticized. Cosmological evidence suggesting an ether is mentioned. Only ether theories formally identical to Relativity have been published in depth. They stand criticized as being contrary to the positivist spirit. The history of mechanical analogues is traced, from Hartley's representing gravitating matter as spherical standing waves, to recent suggestions that vortex-sponge might model electromagnetic, quantum, uncertainty and faster-than-light phenomena. Contemporary theories are particular physical theories, themselves 'second interpretations' of a primary mathematical model. Mechanical analogues are auxiliary, not necessary, to other theory, disclosing relationships between classical and non-classical descriptions of assemblies charging state. The ether-relativity polemic, part of a broader dispute about relativity, is founded on mistaken conceptions of the roles of mathematical and physical models, mechanical analogues; and a distored view of history, which indicates that ether theories have become relativistic. 103 references.

  4. Optical clocks and relativity.

    Science.gov (United States)

    Chou, C W; Hume, D B; Rosenband, T; Wineland, D J

    2010-09-24

    Observers in relative motion or at different gravitational potentials measure disparate clock rates. These predictions of relativity have previously been observed with atomic clocks at high velocities and with large changes in elevation. We observed time dilation from relative speeds of less than 10 meters per second by comparing two optical atomic clocks connected by a 75-meter length of optical fiber. We can now also detect time dilation due to a change in height near Earth's surface of less than 1 meter. This technique may be extended to the field of geodesy, with applications in geophysics and hydrology as well as in space-based tests of fundamental physics.

  5. Gravitation and relativity

    CERN Document Server

    Hoffmann, William F

    1964-01-01

    Remarks on the observational basis of general relativity ; Riemannian geometry ; gravitation as geometry ; gravitational waves ; Mach's principle and experiments on mass anisotropy ; the many faces of Mach ; the significance for the solar system of time-varying gravitation ; relativity principles and the role of coordinates in physics ; the superdense star and the critical nucleon number ; gravitation and light ; possible effects on the solar system of φ waves if they exist ; the Lyttleton-Bondi universe and charge equality ; quantization of general relativity ; Mach's principle as boundary condition for Einstein's equations.

  6. NgsRelate

    DEFF Research Database (Denmark)

    Korneliussen, Thorfinn Sand; Moltke, Ida

    2015-01-01

    be called with high certainty. RESULTS: We present a software tool, NgsRelate, for estimating pairwise relatedness from NGS data. It provides maximum likelihood estimates that are based on genotype likelihoods instead of genotypes and thereby takes the inherent uncertainty of the genotypes into account....... Using both simulated and real data, we show that NgsRelate provides markedly better estimates for low-depth NGS data than two state-of-the-art genotype-based methods. AVAILABILITY: NgsRelate is implemented in C++ and is available under the GNU license at www.pop gen.dk/software. CONTACT: ida...

  7. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Emergencies A-Z Share this! Home » Emergency 101 Heat-Related Illnesses Dr. Glenn Mitchell , Emergency physician at ... about heat cramps and heat stroke and exhaustion. Heat Cramps Symptoms include muscle spasms, usually in the ...

  8. Sport-related concussions

    Directory of Open Access Journals (Sweden)

    Jéssica Natuline Ianof

    Full Text Available ABSTRACT Traumatic brain injury (TBI is a major cause of lifelong disability and death worldwide. Sport-related traumatic brain injury is an important public health concern. The purpose of this review was to highlight the importance of sport-related concussions. Concussion refers to a transient alteration in consciousness induced by external biomechanical forces transmitted directly or indirectly to the brain. It is a common, although most likely underreported, condition. Contact sports such as American football, rugby, soccer, boxing, basketball and hockey are associated with a relatively high prevalence of concussion. Various factors may be associated with a greater risk of sport-related concussion, such as age, sex, sport played, level of sport played and equipment used. Physical complaints (headache, fatigue, dizziness, behavioral changes (depression, anxiety, irritability and cognitive impairment are very common after a concussion. The risk of premature return to activities includes the prolongation of post-concussive symptoms and increased risk of concussion recurrence.

  9. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Health System in Chesterfield, Missouri Heat-related illness can be caused by overexposure to the sun or ... the elderly are most at risk, but anyone can be affected. Here you will find information about ...

  10. What Are Related Disorders?

    Science.gov (United States)

    ... physical problems. Some examples are Loeys-Dietz syndrome, Ehlers-Danlos syndrome, and Familial Thoracic Aortic Aneurysm and Dissection. ... are related to Marfan syndrome: Loeys-Dietz Syndrome Ehlers-Danlos Syndrome Familial Thoracic Aortic Aneurysm and Dissection MASS ...

  11. Ecomium Public Relations

    Science.gov (United States)

    Moorefield, Arthur A.

    1973-01-01

    A music professor suggests that science, math, English and history departments of colleges and universities can help build public relations, thereby taking the burden off touring choral groups, orchestras, and bands. (PG)

  12. Simple relation algebras

    CERN Document Server

    Givant, Steven

    2017-01-01

    This monograph details several different methods for constructing simple relation algebras, many of which are new with this book. By drawing these seemingly different methods together, all are shown to be aspects of one general approach, for which several applications are given. These tools for constructing and analyzing relation algebras are of particular interest to mathematicians working in logic, algebraic logic, or universal algebra, but will also appeal to philosophers and theoretical computer scientists working in fields that use mathematics. The book is written with a broad audience in mind and features a careful, pedagogical approach; an appendix contains the requisite background material in relation algebras. Over 400 exercises provide ample opportunities to engage with the material, making this a monograph equally appropriate for use in a special topics course or for independent study. Readers interested in pursuing an extended background study of relation algebras will find a comprehensive treatme...

  13. EU-Mashreq Relations

    DEFF Research Database (Denmark)

    Seeberg, Peter

    2018-01-01

    This chapter presents an overview of key issues in the relations between the European Union (EU) and the countries in the Mashreq region since the launching of the European Neighbourhood Policy (ENP) in 2004. In this chapter, the Mashreq mainly refers to Egypt, Jordan, Lebanon and Syria. 1...... Initially, it should be emphasized that the following analysis of EU-Mashreq relations is influenced by the very different political, social and economic realities in the four countries. As stated in a Strategy Paper from the European Commission in 2004, this was, from the beginning, reflected in ENP-related...... foreign policy considerations: the ENP Action Plans (APs) ‘will draw on a common set of principles but will be differentiated, reflecting the existing state of relations with each country, its needs and capacities, as well as common interests’ (Commission of the European Communities 2004). In the Mashreq...

  14. Drug related critical incidents.

    Science.gov (United States)

    Khan, F A; Hoda, M Q

    2005-01-01

    Drug related incidents are a common form of reported medical errors. This paper reviews the critical incidents related to drug errors reported from the main operating theatre suite in a teaching hospital in a developing country from January 1997 to December 2002. Each report was evaluated individually by two reviewers using a structured process. During this period, 44 874 anaesthetics were administered; 768 critical incidents were reported, 165 (21%) of which were related to drug errors. Underdosage, side-effect/drug reaction and syringe swap were the most common. A total of 76% were classified as preventable; 56% due to human error and 19% due to system error. High risk incidents accounted for 10% of all drug errors and most of these were related to the use of neuromuscular blocking drugs. This analysis has been found useful in addressing some issues about priorities.

  15. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Medicine's Front Line Observation Emergency Care Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share ... Illnesses Dr. Glenn Mitchell , Emergency physician at Mercy Health System in Chesterfield, Missouri Heat-related illness can ...

  16. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... ICE” in Your Cell Phone Prepare for Disasters Communication With Your Family And Your Doctor About Your ... Dr. Glenn Mitchell , Emergency physician at Mercy Health System in Chesterfield, Missouri Heat-related illness can be ...

  17. Publicity and public relations

    Science.gov (United States)

    Fosha, Charles E.

    1990-01-01

    This paper addresses approaches to using publicity and public relations to meet the goals of the NASA Space Grant College. Methods universities and colleges can use to publicize space activities are presented.

  18. Managing or Relating?

    DEFF Research Database (Denmark)

    Sproedt, Henrik; Buur, Jacob

    2010-01-01

    This paper describes a case of user-driven innovation. We draw on social capital theory and the concept of complex responsive processes to examine the role of relations for the exchange and generation of knowledge across different knowledge traditions. We argue that innovation as a social phenome...... phenomenon with a high degree of uncertainty and complexity requires more relating and less managing to use conflict as a resource by turning the friction between different knowledge traditions into creative friction....

  19. The metamorphoses of relativity

    Science.gov (United States)

    Staley, Richard

    This talk will explore the ways that problems shifted and disciplinary boundaries changed around physicists' engagement with relational physics and relativistic thought, first in research dealing with physiology, psychology and geometry in the late nineteenth century and then (a better-known story) moving between physics, mathematics and geometry in the twentieth century. I hope to develop a richer approach for understanding the disciplinary and political significance of relativity, especially by considering in one framework the work of Engels, Mach, Einstein and Planck.

  20. State extended uncertainty relations

    Energy Technology Data Exchange (ETDEWEB)

    Trifonov, D.A. [Institute for Nuclear Research, Sofia (Bulgaria)

    2000-08-18

    A scheme for construction of uncertainty relations for n observables and m states is presented. Several lowest-order inequalities are displayed and briefly discussed. For two states vertical bar {psi} > and vertical bar {phi} > and canonical observables the (entangled) extension of the Heisenberg relation reads [{delta}p({psi})]{sup 2}+[{delta}q({phi})]{sup 2}+[{delta}p({phi})]{sup 2}[{delta}q({psi})]{sup 2}= {>=}1/2. (author). Letter-to-the-editor.

  1. Algorithmic Relative Complexity

    OpenAIRE

    Daniele Cerra; Mihai Datcu

    2011-01-01

    Information content and compression are tightly related concepts that can be addressed through both classical and algorithmic information theories, on the basis of Shannon entropy and Kolmogorov complexity, respectively. The definition of several entities in Kolmogorov’s framework relies upon ideas from classical information theory, and these two approaches share many common traits. In this work, we expand the relations between these two frameworks by introducing algorithmic cross-complexity ...

  2. Why was Relativity Accepted?

    Science.gov (United States)

    Brush, S. G.

    Historians of science have published many studies of the reception of Einstein's special and general theories of relativity. Based on a review of these studies, and my own research on the role of the light-bending prediction in the reception of general relativity, I discuss the role of three kinds of reasons for accepting relativity (1) empirical predictions and explanations; (2) social-psychological factors; and (3) aesthetic-mathematical factors. According to the historical studies, acceptance was a three-stage process. First, a few leading scientists adopted the special theory for aesthetic-mathematical reasons. In the second stage, their enthusiastic advocacy persuaded other scientists to work on the theory and apply it to problems currently of interest in atomic physics. The special theory was accepted by many German physicists by 1910 and had begun to attract some interest in other countries. In the third stage, the confirmation of Einstein's light-bending prediction attracted much public attention and forced all physicists to take the general theory of relativity seriously. In addition to light-bending, the explanation of the advance of Mercury's perihelion was considered strong evidence by theoretical physicists. The American astronomers who conducted successful tests of general relativity became defenders of the theory. There is little evidence that relativity was `socially constructed' but its initial acceptance was facilitated by the prestige and resources of its advocates.

  3. INTERPERSONAL RELATIONS IN SCHOOL

    Directory of Open Access Journals (Sweden)

    Siniša Opić

    2016-12-01

    Full Text Available As part of the scientific project titled “The Curriculum of Social Competences and Relations in School”, the aim of this paper is to examine the quality of interpersonal relations between teachers and pupils. On a sample of 432 teachers from 20 towns, 35 primary schools in the Republic of Croatia, and 432 pupils, it was confirmed that there is a difference in the appraisal of the quality of their interpersonal relations. Although the overall quality of interpersonal relations between pupils and teachers is at a moderately satisfactory level, pupils still appraise the quality of interpersonal relations lower than their teachers. In view of latent dimensionality, a factor questionnaire structure was used (14 variables; ordinal type and two main components (subscales determined: didactic support and interaction, and rough verbal and physical treatment. As part of the differential draft of our research, no gender differences were established (between female and male teachers in the appraisal of the quality of interpersonal relations with pupils (on two subscales. The correlation analysis confirmed a low negative statistically significant correlation between the years of service and the subscale rough verbal and physical treatment (Rho=-0.101. In view of the subscale of rough verbal and physical treatment between pupils and teachers, such results on a negative correlation imply that older teachers, as opposed to their younger colleagues, use more corporal punishment in schools, treat pupils rudely, use nasty and impolite words, and call pupils insulting names.

  4. De Sitter projective relativity

    CERN Document Server

    Licata, Ignazio; Benedetto, Elmo

    2017-01-01

    This book presents the Projective approach to de Sitter Relativity. It traces the development of renewed interest in models of the universe at constant positive curvature such as "vacuum" geometry. The De Sitter Theory of Relativity, formulated in 1917 with Willem De Sitter's solution of the Einstein equations, was used in different fields during the 1950s and 1960s, in the work of H. Bacry, J.M. LevyLeblond and F.Gursey, to name some important contributors. From the 1960s to 1980s, L. Fantappié and G. Arcidiacono provided an elegant group approach to the De Sitter universe putting the basis for special and general projective relativity. Today such suggestions flow into a unitary scenario, and this way the De Sitter Relativity is no more a "missing opportunity" (F. Dyson, 1972), but has a central role in theoretical physics. In this volume a systematic presentation is given of the De Sitter Projective relativity, with the recent developments in projective general relativity and quantum cosmology.

  5. Frontiers in Numerical Relativity

    Science.gov (United States)

    Evans, Charles R.; Finn, Lee S.; Hobill, David W.

    2011-06-01

    Preface; Participants; Introduction; 1. Supercomputing and numerical relativity: a look at the past, present and future David W. Hobill and Larry L. Smarr; 2. Computational relativity in two and three dimensions Stuart L. Shapiro and Saul A. Teukolsky; 3. Slowly moving maximally charged black holes Robert C. Ferrell and Douglas M. Eardley; 4. Kepler's third law in general relativity Steven Detweiler; 5. Black hole spacetimes: testing numerical relativity David H. Bernstein, David W. Hobill and Larry L. Smarr; 6. Three dimensional initial data of numerical relativity Ken-ichi Oohara and Takashi Nakamura; 7. Initial data for collisions of black holes and other gravitational miscellany James W. York, Jr.; 8. Analytic-numerical matching for gravitational waveform extraction Andrew M. Abrahams; 9. Supernovae, gravitational radiation and the quadrupole formula L. S. Finn; 10. Gravitational radiation from perturbations of stellar core collapse models Edward Seidel and Thomas Moore; 11. General relativistic implicit radiation hydrodynamics in polar sliced space-time Paul J. Schinder; 12. General relativistic radiation hydrodynamics in spherically symmetric spacetimes A. Mezzacappa and R. A. Matzner; 13. Constraint preserving transport for magnetohydrodynamics John F. Hawley and Charles R. Evans; 14. Enforcing the momentum constraints during axisymmetric spacelike simulations Charles R. Evans; 15. Experiences with an adaptive mesh refinement algorithm in numerical relativity Matthew W. Choptuik; 16. The multigrid technique Gregory B. Cook; 17. Finite element methods in numerical relativity P. J. Mann; 18. Pseudo-spectral methods applied to gravitational collapse Silvano Bonazzola and Jean-Alain Marck; 19. Methods in 3D numerical relativity Takashi Nakamura and Ken-ichi Oohara; 20. Nonaxisymmetric rotating gravitational collapse and gravitational radiation Richard F. Stark; 21. Nonaxisymmetric neutron star collisions: initial results using smooth particle hydrodynamics

  6. Amiodarone-related Pneumonitis

    Directory of Open Access Journals (Sweden)

    Sheng-Nan Chang

    2007-05-01

    Full Text Available Amiodarone-related pneumonitis is a potentially limiting factor for amiodarone usage. However, it is believed that amiodarone-related pneumonitis is unlikely to occur during low-dose and short courses of therapy. We report three patients who received low-dose amiodarone, 200 mg/day, for an average of 6.6 months and who developed amiodarone-related pneumonitis. All patients were male with age of 75, 93 and 85, respectively, and had the habit of cigarette smoking. The initial presentation was dyspnea without symptoms and signs of heart failure. Their chest radiographs showed diffuse interstitial pneumonitis pattern and chest computed tomography scan also confirmed interstitial pneumonitis. Treatment included cessation of amiodarone and corticosteroid usage. All patients improved symptomatically by early detection and early treatment. This case report implies that old age and possible pre-existing pulmonary abnormalities caused by smoking could be associated with amiodarone-related pulmonary toxicity. Clinicians must remain alert to detect amiodarone-related pneumonitis even under low dosage and short duration of amiodarone usage. Immediate withdrawal of amiodarone and prompt steroid therapy will ensure full recovery.

  7. Relationality and social interaction.

    Science.gov (United States)

    Bottero, Wendy

    2009-06-01

    This paper explores Bourdieu's account of a relational social space, and his relative neglect of social interaction within this framework. Bourdieu includes social capital as one of the key relational elements of his social space, but says much less about it than economic or cultural capital, and levels of social capital are rarely measured in his work. Bourdieu is reluctant to focus on the content of social networks as part of his rejection of substantialist thinking. The neglect of substantive networks creates problems for Bourdieu's framework, because many of Bourdieu's core concepts rest upon assumptions about their interactional properties (in particular, the prevalence of homophilous differential association) which are left unexamined. It is argued here that Bourdieu's neglect of the substance of social networks is related to the criticisms that Bourdieu's framework often encounters, and that this neglect bears re-examination, since it is helpful to think of the ways in which differentiated social networks contribute to the development of habitus, help form fields, and so constitute the intersubjective social relations within which sociality, and practice more generally, occur.

  8. Algorithmic Relative Complexity

    Directory of Open Access Journals (Sweden)

    Daniele Cerra

    2011-04-01

    Full Text Available Information content and compression are tightly related concepts that can be addressed through both classical and algorithmic information theories, on the basis of Shannon entropy and Kolmogorov complexity, respectively. The definition of several entities in Kolmogorov’s framework relies upon ideas from classical information theory, and these two approaches share many common traits. In this work, we expand the relations between these two frameworks by introducing algorithmic cross-complexity and relative complexity, counterparts of the cross-entropy and relative entropy (or Kullback-Leibler divergence found in Shannon’s framework. We define the cross-complexity of an object x with respect to another object y as the amount of computational resources needed to specify x in terms of y, and the complexity of x related to y as the compression power which is lost when adopting such a description for x, compared to the shortest representation of x. Properties of analogous quantities in classical information theory hold for these new concepts. As these notions are incomputable, a suitable approximation based upon data compression is derived to enable the application to real data, yielding a divergence measure applicable to any pair of strings. Example applications are outlined, involving authorship attribution and satellite image classification, as well as a comparison to similar established techniques.

  9. Dynamics and Relativity

    CERN Document Server

    Forshaw, Jeffrey

    2009-01-01

    A new title in the Manchester Physics Series, this introductory text emphasises physical principles behind classical mechanics and relativity. It assumes little in the way of prior knowledge, introducing relevant mathematics and carefully developing it within a physics context. Designed to provide a logical development of the subject, the book is divided into four sections, introductory material on dynamics, and special relativity, which is then followed by more advanced coverage of dynamics and special relativity. Each chapter includes problems ranging in difficulty from simple to challenging with?solutions for solving problems. Includes?solutions for solving problemsNumerous worked examples included throughout the bookMathematics is carefully explained and developed within a physics environmentSensitive to topics that can appear daunting or confusing

  10. Tensors, relativity, and cosmology

    CERN Document Server

    Dalarsson, Mirjana

    2015-01-01

    Tensors, Relativity, and Cosmology, Second Edition, combines relativity, astrophysics, and cosmology in a single volume, providing a simplified introduction to each subject that is followed by detailed mathematical derivations. The book includes a section on general relativity that gives the case for a curved space-time, presents the mathematical background (tensor calculus, Riemannian geometry), discusses the Einstein equation and its solutions (including black holes and Penrose processes), and considers the energy-momentum tensor for various solutions. In addition, a section on relativistic astrophysics discusses stellar contraction and collapse, neutron stars and their equations of state, black holes, and accretion onto collapsed objects, with a final section on cosmology discussing cosmological models, observational tests, and scenarios for the early universe. This fully revised and updated second edition includes new material on relativistic effects, such as the behavior of clocks and measuring rods in m...

  11. Rotating Stars in Relativity

    Directory of Open Access Journals (Sweden)

    Stergioulas Nikolaos

    2003-01-01

    Full Text Available Rotating relativistic stars have been studied extensively in recent years, both theoretically and observationally, because of the information they might yield about the equation of state of matter at extremely high densities and because they are considered to be promising sources of gravitational waves. The latest theoretical understanding of rotating stars in relativity is reviewed in this updated article. The sections on the equilibrium properties and on the nonaxisymmetric instabilities in f-modes and r-modes have been updated and several new sections have been added on analytic solutions for the exterior spacetime, rotating stars in LMXBs, rotating strange stars, and on rotating stars in numerical relativity.

  12. Essential dynamics and relativity

    CERN Document Server

    O'Donnell, Peter J

    2014-01-01

    Essential Dynamics & Relativity provides students with an introduction to the core aspects of dynamics and special relativity. The author reiterates important ideas and terms throughout and covers concepts that are often missing from other textbooks at this level. He also places each topic within the wider constructs of the theory, without jumping from topic to topic to illustrate a point.The first section of the book focuses on dynamics, discussing the basic aspects of single particle motion and analyzing the motion of multi-particle systems. The book also explains the dynamical behavior of b

  13. Relativity and its roots

    CERN Document Server

    Hoffmann, Banesh

    1998-01-01

    In this fascinating, accessible introduction to one of the most revolutionary developments in modern physics, Einstein scholar Banesh Hoffmann recounts the successive insights that led to both the special and general theories of relativity.Using simple examples from everyday life, the author presents entertaining, nontechnical demonstrations of what relativity actually means and how it has revolutionized our ideas of time and space. Starting with the geometrical and cosmological ideas of the ancient Greeks, the author traces the succession of ideas and advances that paved the way for modern p

  14. On Allometry Relations

    Science.gov (United States)

    2012-07-06

    ed.) The Notebooks of Leonardo da Vinci , Vol. 1 (Dover, New York, 1970); unabridged edition of the work first published in London in 1883. 178. R...connect the “law” with a larger body of theory and/or data. An example drawn from the Notebooks of Leonardo da Vinci177 relates the diameter of a parent...limb d0 to two daughter limbs d1 and d2 : dα0 = d α 1 + d α 2 . (9) The da Vinci scaling relation supplies the phenomenological mechanism necessary

  15. Bourdieu in International Relations

    DEFF Research Database (Denmark)

    The last few years have seen a genuine wave of publications promoting sociology in international relations. Scholars have suggested that Bourdieu’s vocabulary can be applied to study security, diplomacy, migration and global environmental politics. Yet we still lack a systematic and accessible....... The chapters demonstrate how these concepts can be reinterpreted and used in new ways when exposed to Bourdieusian logic. Challenging key pillars of IR scholarship, Bourdieu in International Relations will be of interest to critical theorists, and scholars of IR theory....

  16. Annoying Danish Relatives

    DEFF Research Database (Denmark)

    Jensen de López, Kristine M.; Sundahl Olsen, Lone; Chondrigianni, V.

    2014-01-01

    This study examines the comprehension and production of subject and object relative clauses (SRCs, ORCs) by children with Specific Language Impairment (SLI) and their typically developing (TD) peers. The purpose is to investigate whether relative clauses are problematic for Danish children with SLI...... task, as well as on SRCs compared to ORCs and produced various avoidance strategies. In the ORC context, children with SLI produced more reversal errors than the AM children, who opted for passive ORCs. These results are discussed within current theories of SLI and indicate a deficiency...

  17. Structural Logical Relations

    DEFF Research Database (Denmark)

    Schürmann, Carsten; Sarnat, Jeffrey

    2008-01-01

    Tait's method (a.k.a. proof by logical relations) is a powerful proof technique frequently used for showing foundational properties of languages based on typed lambda-calculi. Historically, these proofs have been extremely difficult to formalize in proof assistants with weak meta-logics, such as ......Tait's method (a.k.a. proof by logical relations) is a powerful proof technique frequently used for showing foundational properties of languages based on typed lambda-calculi. Historically, these proofs have been extremely difficult to formalize in proof assistants with weak meta...

  18. Work-related asthma

    African Journals Online (AJOL)

    grain dust, welding fumes and wood dust. (Table III).1 Exposure to animal epithelia, hairs and secretions is commonly reported among laboratory animal workers and agricultural workers. Latex allergy-related asthma appears to be less common due to the introduction of latex-free gloves in most health care settings.

  19. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Vomiting and Diarrhea Stroke Your Blood Pressure ...

  20. Can Relations be Designed?

    DEFF Research Database (Denmark)

    Skou, Niels Peter; Mikkelsen, Mette

    2014-01-01

    This paper examines the role of design methods in a social innovation project on a Danish Institution for severely physically and mentally handicapped people. The project was focused on ‘designing’ new or better relations between the residents at the institution and the civil society. During the ...

  1. On conformally related -waves

    Indian Academy of Sciences (India)

    Conformal transformations; conformal Killing vectors; -waves. Abstract. Brinkmann [1] has shown that conformally related distinct Ricci flat solutions are -waves. Brinkmann's result has been generalized to include the conformally invariant source terms. It has been shown that [4] if g i k and g ¯ i k ( = − 2 g i k , : a ...

  2. Relationality and Mathematical Knowing

    Science.gov (United States)

    Maheux, Jean-Francois; Roth, Wolff-Michael

    2011-01-01

    Current conceptualizations of knowing and learning tend to separate the knower from others, the world they know, and themselves. In this article, we offer "relationality" as an alternative to such conceptualizations of mathematical knowing. We begin with the perspective of Maturana and Varela to articulate some of its problems and our alternative.…

  3. Om evalueringsforskningens relative autonomi

    DEFF Research Database (Denmark)

    Nørholm, Morten

    2008-01-01

    Det empiriske udgangspunkt for artiklen "Om evalueringsforskningens relative autonomi - dansk normal evalueringsforskning som et ikke-autonomt (sub)felt i magtens felt" er en række tekster af fire dominerende danske evalueringsforskere. Det teoretiske udgangspunkt er især Pierre Bourdieus teori om...

  4. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Puncture Wounds Snake Bites Teeth (Dental Emergencies) ...

  5. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Bites and Stings Listen to your Symptoms - ...

  6. A Concurrent Logical Relation

    DEFF Research Database (Denmark)

    Birkedal, Lars; Sieczkowski, Filip; Thamsborg, Jacob Junker

    2012-01-01

    We present a logical relation for showing the correctness of program transformations based on a new type-and-effect system for a concurrent extension of an ML-like language with higher-order functions, higher-order store and dynamic memory allocation. We show how to use our model to verify a number...

  7. Related Addictive Disorders.

    Science.gov (United States)

    Buck, Tina; Sales, Amos

    This paper provides an overview of addiction related to substance abuse. It provides basic information, prevalence, diagnostic criteria, assessment tools, and treatment issues for eating disorders, compulsive gambling, sex addictions, and work addictions. Eating disorders such as anorexia nervosa and bulimia nervosa, especially affect adolescents.…

  8. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Sore Throat Suicide Your Blood Pressure Score ...

  9. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Your Blood Pressure Score is as Important ...

  10. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Shock Sore Throat Suicide Resources Home Safety ...

  11. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Puncture Wounds Teeth (Dental Emergencies) Sore Throat ...

  12. Lessons in Human Relations.

    Science.gov (United States)

    Glenn, Joanne Lozar

    2003-01-01

    Explores the importance of relationship literacy--the ability to create good relationships with others--in the next economy and offers perspectives on how business education instructors can help students develop and improve their human relations skills for business success. (Author/JOW)

  13. Relational aspects of clusters

    DEFF Research Database (Denmark)

    Gjerding, Allan Næs

    The present paper is the first preliminary account of a project being planned for 2013, focussing on the development of the biomedico cluster in North Denmark. The project focusses on the relational capabilities of the cluster in terms of a number of organizational roles which are argued...... to be necessary for the development and growth of the upcoming cluster in question....

  14. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Sore Throat Chest Pain Is ALWAYS A ...

  15. Sports-related concussions.

    Science.gov (United States)

    Conder, Robert L; Conder, Alanna A

    2015-04-01

    Concussions are an inherent part of collision sports such as football and soccer. As a subset of traumatic brain injury, concussions are neurometabolic events that cause transient neurologic dysfunction. Following a concussion, some athletes require longer neurologic recovery than others. Education and intervention aimed at prevention and management can minimize the long-term sequelae of sports-related concussions.

  16. Challenging Scandinavian employment relations

    DEFF Research Database (Denmark)

    Ibsen, Christian Lyhne; Larsen, Trine Pernille; Madsen, Jørgen Steen

    2011-01-01

    and employment relations in the Danish, Norwegian and Swedish public sector. In this paper, we argue that although differences exist across the Scandinavian countries, it is evident that they have managed to adopt and implement NPM-inspired reforms without dismantling their universal welfare services and strong...

  17. Employment Relations in Denmark

    DEFF Research Database (Denmark)

    Madsen, Jørgen Steen; Due, Jesper Jørgen; Andersen, Søren Kaj

    2011-01-01

    Jørgen Steen Madsen, Jesper Due og Søren Kaj Andersen har skrevet et kapitel om udviklingen i dansk arbejdsmarkedsregulering til bogen International and Comparative Employment Relations, redigeret af Greg Bamber, Russell Lansbury og Nick Wailes. Bogen indeholder bidrag, der præsenterer og...

  18. Status of numerical relativity

    Indian Academy of Sciences (India)

    Numerical relativity; gravitational waves; black hole; neutron star. ... and stellar collapse, emphasizing the well-developed current status of such implementations that enable simulations for several astrophysical phenomena. Some of our latest results for simulation of binary neutron star mergers are briefly presented.

  19. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Adverse Drug Reactions Your Blood Pressure Score ...

  20. Status of numerical relativity

    Indian Academy of Sciences (India)

    schemes are described in [48]. 2.5 Black hole finder. In many simulations of numerical relativity, black holes are formed or exist from the beginning of simulation (e.g., in merger of binary black holes). To confirm the existence of black holes and to find their location, apparent horizon finder and/or event horizon finder have to ...

  1. Work-related stress

    NARCIS (Netherlands)

    Houtman, I.L.D.

    2005-01-01

    Changes in the content and organisation of work in recent decades have resulted in an intensification of work, which is commonly regarded as a cause of stress. This report presents trends in the risks and consequences of work-related stress, and identifies how these can be prevented. The focus

  2. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Seizures Vomiting and Diarrhea Sunburn and Sun ...

  3. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Vomiting and Diarrhea Shock Sprains and Strains ...

  4. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Choking (Heimlich Maneuver) Snake Bites Sore Throat ...

  5. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Dr. Glenn Mitchell , Emergency physician at Mercy Health System in Chesterfield, Missouri Heat-related illness can be caused by overexposure to the sun or any situation that involves extreme heat. Young children and the elderly are most at risk, but anyone can be affected. ...

  6. Is Happinness relative?

    NARCIS (Netherlands)

    R. Veenhoven (Ruut)

    1991-01-01

    textabstractABSTRACT The theory that happiness is relative is based on three postulates: (1) happiness results from comparison. (2) standards of comparison adjust, (3) standards of comparison are arbitrary constructs. On the basis of these postulates the theory predicts: (a) happiness does not

  7. Effective relational dynamics

    NARCIS (Netherlands)

    Höhn, P.A.

    2011-01-01

    We provide a synopsis of an effective approach to the problem of time in the semiclassical regime. The essential features of this new approach to evaluating relational quantum dynamics in constrained systems are illustrated by means of a simple toy model.

  8. Related Drupal Nodes Block

    NARCIS (Netherlands)

    Van der Vegt, Wim

    2010-01-01

    Related Drupal Nodes Block This module exposes a block that uses Latent Semantic Analysis (Lsa) internally to suggest three nodes that are relevant to the node a user is viewing. This module performs three tasks. 1) It periodically indexes a Drupal site and generates a Lsa Term Document Matrix.

  9. Sport-Related Concussions

    Science.gov (United States)

    Brady, Don; Brady, Flo

    2011-01-01

    Sport-related concussions (SRC) are not limited to specific age ranges, professional athletes, or gender. The primary focus of much of SRC research pertains to the assessment, management, and return to play (RTP) of the concussed athlete. This article highlights some major issues of SRC along with some controversies that presently exist within the…

  10. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Chest Pain Is ALWAYS A Reason To ...

  11. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Sore Throat Suicide Puncture Wounds Resources Home ...

  12. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Sprains and Strains Sunburn and Sun Safety ...

  13. Heat-Related Illnesses

    Medline Plus

    Full Text Available ... Fact Sheet Health & Safety Tips Campaigns SUBSCRIBE Emergencies A-Z Share this! Home » Emergency 101 Heat-Related ... if the person becomes unconscious. READ IN EMERGENCIES A-Z Mental Health Emergencies - Waits for Care Grow ...

  14. Relational time in physics

    Energy Technology Data Exchange (ETDEWEB)

    Assis, A.K.T. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)

    2011-07-01

    Full text: Isaac Newton (1642-1727) defended in his book Mathematical Principles of Natural Philosophy, also know as Principia, published in 1687, the utilization of absolute time in physics. According to him 'absolute, true, and mathematical time, of itself, and from its own nature, flows equably without relation to anything external'. Leibniz (1646-1716), on the other hand, was against this concept and proposed relative time to replace it: 'As for my opinion, I have said more than once, that I hold space to be something merely relative, as time is; that I hold it to be an order of coexistence, as time is an order of successions'. Leibniz ideas were accepted and developed by Ernst Mach (1838-1916) in his book The Science of Mechanics, published in 1883. In this work we consider the implementation of relational time, as proposed by Leibniz and Mach, and the consequences this implementation will mean for physics as a whole. We consider some specific examples related to mechanics (Newton's bucket experiment, the flattening of the Earth, Foucault's pendulum experiment) and to electromagnetism (Ampere's force between current carrying wires, an electric charge describing a Larmor radius due to a nearby large magnet, two charges orbiting around one another). We generalize these ideas considering the principle of physical proportions (PPP), according to which no absolute magnitudes should appear in the laws of physics. We present some laws satisfying this principle and others which do not comply with it. The laws which do not satisfy the PPP should be based upon incomplete theories. We present the consequences of complete theories complying with this fundamental principle of nature. (author)

  15. TURISMO RELIGIOSO EN ESPAÑA: ¿LA GALLINA DE LOS HUEVOS DE ORO? UNA VIEJA TRADICIÓN, VERSUS UN TURISMO EMERGENTE

    OpenAIRE

    Gemma Cànoves Valiente; Asunción Blanco Romero

    2011-01-01

    El artículo muestra cómo el turismo religioso es una expresión más de la comercialización de la cultura y de la religión. En base a esta hipótesis, los casos del Monasterio de Montserrat, el camino de Santiago y la semana Santa de Granada son ejemplo de las sinergias entre patrimonio religioso y turismo. El artículo se estructura en cuatro apartados. En el primero, se definen los términos y estado de la cuestión. El segundo, analiza los escasos datos sobre el turismo religioso y finalmente se...

  16. TURISMO RELIGIOSO EN ESPAÑA: ¿LA GALLINA DE LOS HUEVOS DE ORO? UNA VIEJA TRADICIÓN, VERSUS UN TURISMO EMERGENTE

    Directory of Open Access Journals (Sweden)

    Gemma Cànoves Valiente

    2011-01-01

    Full Text Available El artículo muestra cómo el turismo religioso es una expresión más de la comercialización de la cultura y de la religión. En base a esta hipótesis, los casos del Monasterio de Montserrat, el camino de Santiago y la semana Santa de Granada son ejemplo de las sinergias entre patrimonio religioso y turismo. El artículo se estructura en cuatro apartados. En el primero, se definen los términos y estado de la cuestión. El segundo, analiza los escasos datos sobre el turismo religioso y finalmente se explican los casos de estudio, las conclusiones y las líneas futuras para este viejo-nuevo turismo.

  17. El retablo mayor del monasterio jerónimo de Santa María de Espeja. Una vieja imagen y una nueva visión

    Directory of Open Access Journals (Sweden)

    Cruz Yábar, Juan María

    2011-06-01

    Full Text Available This study deals with the altarpiece by Giovanni Battista Crescenzi for the Jeronymite Monastery of Espeja, by using an old image unknown to specialists until now. The author compares this work to others by Crescenzi, as well as to the altarpiece designed by Juan Gómez de Mora for the Hospital of Antón Martin, thereby arriving at conclusions concerning their similarities and differences, representative of their aesthetic tastes. The photograph likewise reveals two of the six paintings by Juan Bautista Maíno for this altarpiece.

    Realizamos un estudio del retablo de Giovanni Battista Crescenzi para el monasterio jerónimo de Espeja sobre la base de una antigua imagen que hasta ahora no era conocida por los especialistas. Se compara con otras obras de Crescenzi y con el retablo diseñado por Juan Gómez de Mora para el hospital de Antón Martín, y se obtienen conclusiones acerca de las similitudes y diferencias, representativas de los gustos estéticos de ambos. La fotografía permite observar dos pinturas de Juan Bautista Maíno, de las seis que hizo para este retablo.

  18. Nuevas acciones, viejas prácticas. Partidos, movimientos políticos y sistemas de partidos en Colombia, 1974 -2002.

    OpenAIRE

    Carlos Enrique Guzmán Mendoza

    2004-01-01

    Estudiar los partidos y los movimientos políticos, así como el sistema de partidos en el cual se hallan insertos resulta recurrente y a la vez relevante. La política contemporánea y la democracia misma serían inteligibles sino se tuviera en cuenta el papel que éstos desempeñan para el normal funcionamiento de la democracia. En Colombia, y a pesar de la literatura politológica existente y referida a los partidos políticos, el recorrido por el estudio del tema se nos presenta amp...

  19. Las redes comerciales de los moriscos de Castilla la Vieja: Un vehículo para sus «complicidades»

    Directory of Open Access Journals (Sweden)

    Serafín de TAPIA SÁNCHEZ

    2009-12-01

    Full Text Available Las autoridades cristianas del siglo XVI mantuvieron un constante temor y sospecha hacia la movilidad de los moriscos ya que veían en ella no sólo la voluntad de escapar al control religioso de los párrocos sino la de mantener una extensa red de conexiones entre las diversas comunidades moriscas del país con el objeto —se pensaba en la segunda mitad de la centuria— de hacer posible una sublevación generalizada en el momento en que las condiciones internacionales lo hicieran posible.

  20. Otomíes hidalguenses y mayas yucatecos. Nuevas caras de la migración indígena y viejas formas de organización

    Directory of Open Access Journals (Sweden)

    Mirian Solís Lizama

    2010-01-01

    Full Text Available En este artículo, a través de un breve recorrido histórico, se efectúa un análisis comparativo entre los migrantes hñahñús (otomíes del estado de Hidalgo y los mayas yucatecos del noreste de la entidad. El interés se centra en describir y explicar la relación que estas etnias han sostenido con el Estado mexicano a lo largo de la historia. Esta experiencia, junto con otros factores de distinta naturaleza, las ha marcado de tal manera que ha incidido en la formación de las asociaciones cívicas en Estados Unidos y, en consecuencia, en el envío de remesas colectivas a sus lugares de origen. La discusión sobre el concepto de identidad étnica juega un papel central en el análisis e interpretación del proceso social estudiado.

  1. Cuerpo y medios de comunicación: Viejas obsesiones y nuevas tecnologías: el cuerpo en revistas femeninas argentinas

    Directory of Open Access Journals (Sweden)

    Alejandra R. Roca

    2003-08-01

    Full Text Available En este trabajo se presentan algunos aspectos de los sentidos referidos al cuerpo en revistas dedicadas a la mujer en la ciudad de Buenos Aires. Tributaria de una visión del mundo, la noción de cuerpo pone de manifiesto tanto el proceso de individuación como la concepción mecanicista que fragmenta cuerpo y persona, proveyendo el modelo de 'posesión' del cuerpo. Las transformaciones económico-sociales. su implicancia en las relaciones personales y domésticas, y los avances en la tecnología médica han derivado en una focalización en la belleza corporal y negación del envejecimiento (cuerpo-proyecto como valores morales. El esencialismo y el biologicismo sugerido y expuesto contribuyen a reforzar una diferenciación genérica basada en los estereotipos tradicionales.This paper presents some aspects about the different meanings that refer to the human body in women magazines in Buenos Aires city. Coming from a particular vision of the world, the notion of body and person, providing the model of 'possession' of the body. Socioeconomic transformations, their consequences in the personal and domestic relationships and the advances in medical technology have derived in focalizing in corporal beauty and rejection of aging (body project as moral values. The essentialism/biologicism that is suggested and exposed, contributes to reassert a gender differentiation based on traditional stereotypes.

  2. Análisis del sitio de un bosque altoandino con énfasis en el mantillo. Microcuenca de la quebrada "La Vieja", Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Johanna Paola Vargas Núñez

    2002-07-01

    Full Text Available RESUMENLa materia orgánica es un compartimento importante dentro de los ecosistemas y su estudiopuede proporcionar criterios de manejo para ecosistemas con conflicto de uso, como son los Bos-ques Altoandinos en Colombia. Para realizar este estudio, se escogió un bosque altoandino en loscerros orientales de la ciudad de Bogotá. Para el sitio de estudio se caracterizaron las reservasorgánicas y minerales de los compartimentos foliar, mantillo y suelo; adicionalmente se establecióla descomposición mediante el método de canastas de descomposición de tres mantillos de dis-tintas procedencias (bosque altoandino de Bojacá, bosque de robles de Pacho y páramo de CruzVerde, además del mantillo del sitio, y de cuatro especies seleccionadas (Clusia multiflora, Piperbogotense, Juglans neotropicay Tillandsia fendleri. Las especies con mayor descomposición fueronJuglans neotropicay Piper bogotense, las cuales presentaron también los mayores contenidos denutrientes y la mayor liberación de nutrientes en la descomposición; Clusia multifloray Tillandsiafendleripresentaron menor descomposición y menores contenidos de nutrientes. C. multiflorapre-sentó una liberación media de nutrientes y T. fendleriuna liberación baja. Basándose en estascaracterísticas, se sugiere utilizar a J. neotropicay P. bogotense para la movilización de nutrientesdentro del sitio y a C. multiflorapara promover la reserva de nutrientes dentro del mantillo delbosque. El aporte desde el compartimento foliar al compartimento mantillo representado en lacaída de hojarasca fue de 13.4 Ton · Ha-1 · Año-1, siendo las especies que más aportan Clusiamultiflora, Vaccinumsp. y Weinmannia tomentosa. La profundidad promedio del mantillo fue de 16cm, con una densidad promedio de 14.32 Kg · m-3y un peso promedio de 23.49 Ton por hectárea.El mantillo proveniente de Bojacá y el mantillo nativo del sitio presentaron la mayor descom-posición, los mayores contenidos de nutrientes y las mayor liberación de nutrientes dentro de losmantillos. Los mantillos de Cruz Verde y Pacho tuvieron baja descomposición y bajos contenidosde nutrientes, además de baja liberación de nutrientes. El mantillo de Pacho retuvo fósforo dentro6060Resúmenes de los remanentes de descomposición, por lo que se sugiere utilizar el roble (Quercus humboldtiien ecosistemas donde el fósforo sea limitante. El suelo del sitio tuvo mayor concentración que elmantillo de todos los nutrientes, a excepción del nitrógeno y el fósforo. Al comparar las reservasorgánicas y minerales por hectárea y los flujos orgánicos y minerales por hectárea año dentro delsitio, se encontró que la descomposición del mantillo es menor que la caída de hojarasca, por loque el mantillo tiende a acumularse, y que el elemento limitante es el fósforo, puesto que su con-centración es mayor en el mantillo que en el suelo. En el sitio no se evidenció efecto del microam-biente en la descomposición ni en la producción de hojarasca.

  3. El Partido Comunista en clave local: viejas estrategias en un nuevo escenario político. Río Cuarto, Córdoba (1945-1951

    Directory of Open Access Journals (Sweden)

    Rebeca Camaño Semprini

    2016-01-01

    Full Text Available Los estudios realizados sobre las relaciones entre peronismo y comunis- mo nada dicen sobre las características que éstas asumieron en el interior del país ni sobre las prácticas concretas a que dieron lugar. El presente artículo da cuenta de esto a partir de su abordaje en un espacio local, el de la ciudad de Río Cuarto. Se entiende que tanto las características que asumió la conformación inicial del peronismo allí, como la tradición en las estrategias frentistas y la influencia sobre los gremios locales con que contaba el comunismo, les otorgaron a dichas relaciones una dinámica propia que permitiría complementar y matizar las reconstrucciones que sobre ellas se han hecho desde los espacios historiográficos centrales.

  4. Análisis del sitio de un bosque altoandino con énfasis en el mantillo. Microcuenca de la quebrada "La Vieja", Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Vargas Núñez Johanna Paola

    2002-11-01

    Full Text Available RESUMENLa materia orgánica es un compartimento importante dentro de los ecosistemas y su estudiopuede proporcionar criterios de manejo para ecosistemas con conflicto de uso, como son los Bos-ques Altoandinos en Colombia. Para realizar este estudio, se escogió un bosque altoandino en loscerros orientales de la ciudad de Bogotá. Para el sitio de estudio se caracterizaron las reservasorgánicas y minerales de los compartimentos foliar, mantillo y suelo; adicionalmente se establecióla descomposición mediante el método de canastas de descomposición de tres mantillos de dis-tintas procedencias (bosque altoandino de Bojacá, bosque de robles de Pacho y páramo de CruzVerde, además del mantillo del sitio, y de cuatro especies seleccionadas (Clusia multiflora, Piperbogotense, Juglans neotropicay Tillandsia fendleri. Las especies con mayor descomposición fueronJuglans neotropicay Piper bogotense, las cuales presentaron también los mayores contenidos denutrientes y la mayor liberación de nutrientes en la descomposición; Clusia multifloray Tillandsiafendleripresentaron menor descomposición y menores contenidos de nutrientes. C. multiflorapre-sentó una liberación media de nutrientes y T. fendleriuna liberación baja. Basándose en estascaracterísticas, se sugiere utilizar a J. neotropicay P. bogotense para la movilización de nutrientesdentro del sitio y a C. multiflorapara promover la reserva de nutrientes dentro del mantillo delbosque. El aporte desde el compartimento foliar al compartimento mantillo representado en lacaída de hojarasca fue de 13.4 Ton · Ha-1 · Año-1, siendo las especies que más aportan Clusiamultiflora, Vaccinumsp. y Weinmannia tomentosa. La profundidad promedio del mantillo fue de 16cm, con una densidad promedio de 14.32 Kg · m-3y un peso promedio de 23.49 Ton por hectárea.El mantillo proveniente de Bojacá y el mantillo nativo del sitio presentaron la mayor descom-posición, los mayores contenidos de nutrientes y las mayor liberación de nutrientes dentro de losmantillos. Los mantillos de Cruz Verde y Pacho tuvieron baja descomposición y bajos contenidosde nutrientes, además de baja liberación de nutrientes. El mantillo de Pacho retuvo fósforo dentro6060Resúmenes de los remanentes de descomposición, por lo que se sugiere utilizar el roble (Quercus humboldtiien ecosistemas donde el fósforo sea limitante. El suelo del sitio tuvo mayor concentración que elmantillo de todos los nutrientes, a excepción del nitrógeno y el fósforo. Al comparar las reservasorgánicas y minerales por hectárea y los flujos orgánicos y minerales por hectárea año dentro delsitio, se encontró que la descomposición del mantillo es menor que la caída de hojarasca, por loque el mantillo tiende a acumularse, y que el elemento limitante es el fósforo, puesto que su con-centración es mayor en el mantillo que en el suelo. En el sitio no se evidenció efecto del microam-biente en la descomposición ni en la producción de hojarasca.

  5. El Partido Comunista en clave local: viejas estrategias en un nuevo escenario político. Río Cuarto, Córdoba (1945-1951)

    OpenAIRE

    Rebeca Camaño Semprini

    2016-01-01

    Los estudios realizados sobre las relaciones entre peronismo y comunis- mo nada dicen sobre las características que éstas asumieron en el interior del país ni sobre las prácticas concretas a que dieron lugar. El presente artículo da cuenta de esto a partir de su abordaje en un espacio local, el de la ciudad de Río Cuarto. Se entiende que tanto las características que asumió la conformación inicial del peronismo allí, como la tradición en las estrategias frentistas y la influencia sobre l...

  6. Nuevos tiempos para la documentación informativa en el periodismo digital: viejas y nuevas funciones del servicio de documentación digital

    OpenAIRE

    Rubio-Lacoba, María

    2005-01-01

    Este artículo atiende a la adaptación del servicio de documentación informativa que pertenece a un medio digital. Para ello, parte en primer lugar de la definición de servicio de documentación informativa digital, muestra sus procesos fundamentales de trabajo y, finalmente, expone las funciones tradicionales que se reactualizan y las nuevas funciones que surgen para adaptarse a las nuevas necesidades de los periodistas digitales y del periodismo digital.

  7. THE RELATION APICULTURE - TOURISM

    Directory of Open Access Journals (Sweden)

    Goryana Yonkova

    2016-06-01

    Full Text Available The paper presents analyses of the current condition, trends and opportunities for the apiculture development and its relation to tourism in Bulgaria. Beekeeping is considered as a branch of agriculture since its formation after the liberation to the present day and in its dynamics of development for the last 5 years. Resource base including traditions, state, production and marketing of honey is presented. Data from the National Statistics Institute, Ministry of Agriculture, Food beekeepers' associations, processors and traders of honey and bee products, the Ministry of Tourism and tourism industry organizations is analyzed and discussed. Beekeeping is represented in the relation as a resource for development of apitourism, as untraditional attractive specialized type of tourism, which can support farmers through non-agricultural practices. The paper aimed at assisting companies and individuals in the field of agribusiness and apitourism for the realization of bee products and services.

  8. Numerical relativity beyond astrophysics

    Science.gov (United States)

    Garfinkle, David

    2017-01-01

    Though the main applications of computer simulations in relativity are to astrophysical systems such as black holes and neutron stars, nonetheless there are important applications of numerical methods to the investigation of general relativity as a fundamental theory of the nature of space and time. This paper gives an overview of some of these applications. In particular we cover (i) investigations of the properties of spacetime singularities such as those that occur in the interior of black holes and in big bang cosmology. (ii) investigations of critical behavior at the threshold of black hole formation in gravitational collapse. (iii) investigations inspired by string theory, in particular analogs of black holes in more than 4 spacetime dimensions and gravitational collapse in spacetimes with a negative cosmological constant.

  9. Surviving relatives after suicide

    DEFF Research Database (Denmark)

    Nørrelykke, Helle; Cohrt, Pernille

    suicide in Denmark. This means that at least 400 people undergo the trauma it is when one of their near relatives commits suicide. We also know that the loss from suicide involves a lot of conflicting feelings - like anger, shame, guilt and loss and that the lack of therapy/treatment of these difficult...... and conflicting feelings may result in pathological expansion of grief characterized by extremely reduced quality of life involving severe psychical and social consequences. Suicide a subject of taboo In the 1980s WHO drafted a health policy document (‘Health for all year 2000’) with 38 targets for attaining......We would like to focus on the surviving relatives after suicides, because it is generally accepted that it is especially difficult to recover after the loss from suicide and because we know as a fact that one suicide affects five persons on average. Every year approximately 700 people commit...

  10. Attachment and Related Variables

    Directory of Open Access Journals (Sweden)

    Umit Morsunbul

    2011-09-01

    Full Text Available Attachment which is defined as strong emotional bond people develop for significant others have been investigated by researchers for long years. Attachment theory proposes that attachment patterns developed in the first stages of life are carried onto next stages of life with internal working models. Additionally it is also proposed that attachment patterns are important to determine individual’s social-emotional competence. This study aims to review how attachment patterns differ according to life stages, continuity/discontiniuty of attachment patterns developed in the first stages of life and evaluate the relations between attachment patterns and social-emotional competence. The basic features of social relations model, relationship between attachment patterns and identity development, and risk taking behavior in adolescence have also been investigated in this review.

  11. LAMA2-related myopathy

    DEFF Research Database (Denmark)

    Løkken, Nicoline; Born, Alfred Peter; Duno, Morten

    2015-01-01

    INTRODUCTION: Muscular dystrophy caused by LAMA2-gene mutations is an autosomal recessive disease typically presenting as a severe, early-onset congenital muscular dystrophy (CMD). However, milder cases with a limb-girdle type muscular dystrophy (LGMD) have been described. METHODS: In this study......, we assessed the frequency and phenotypic spectrum of LAMA2-related muscular dystrophy in CMD (n = 18) and LGMD2 (n = 128) cohorts identified in the last 15 years in eastern Denmark. The medical history, brain-MRI, muscle pathology, muscle laminin-α2 expression, and genetic analyses were assessed....... RESULTS: Molecular genetics revealed 2 pathogenic LAMA2 mutations in 5 of 18 CMD and 3 of 128 LGMD patients, corresponding to a LAMA2-mutation frequency of 28% in the CMD and 2.3% in the LGMD cohorts, respectively. CONCLUSIONS: This study demonstrates a wide clinical spectrum of LAMA2-related muscular...

  12. Numerical relativity beyond astrophysics.

    Science.gov (United States)

    Garfinkle, David

    2017-01-01

    Though the main applications of computer simulations in relativity are to astrophysical systems such as black holes and neutron stars, nonetheless there are important applications of numerical methods to the investigation of general relativity as a fundamental theory of the nature of space and time. This paper gives an overview of some of these applications. In particular we cover (i) investigations of the properties of spacetime singularities such as those that occur in the interior of black holes and in big bang cosmology. (ii) investigations of critical behavior at the threshold of black hole formation in gravitational collapse. (iii) investigations inspired by string theory, in particular analogs of black holes in more than 4 spacetime dimensions and gravitational collapse in spacetimes with a negative cosmological constant.

  13. Rotating stars in relativity.

    Science.gov (United States)

    Paschalidis, Vasileios; Stergioulas, Nikolaos

    2017-01-01

    Rotating relativistic stars have been studied extensively in recent years, both theoretically and observationally, because of the information they might yield about the equation of state of matter at extremely high densities and because they are considered to be promising sources of gravitational waves. The latest theoretical understanding of rotating stars in relativity is reviewed in this updated article. The sections on equilibrium properties and on nonaxisymmetric oscillations and instabilities in f -modes and r -modes have been updated. Several new sections have been added on equilibria in modified theories of gravity, approximate universal relationships, the one-arm spiral instability, on analytic solutions for the exterior spacetime, rotating stars in LMXBs, rotating strange stars, and on rotating stars in numerical relativity including both hydrodynamic and magnetohydrodynamic studies of these objects.

  14. International Relations in France

    DEFF Research Database (Denmark)

    Breitenbauch, Henrik Ø.

    Why is the French International Relations (IR) discipline different from the transnational-American discipline? By analysing argument structures in research articles across time, this book shows how the discipline in France is caught between the American character of the discipline and the French...... state as regulator of legitimate forms of expression. Concretely, French research arguments are less explicit about what their propositions are and what academic discussions they draw on and add to than their transnational-American counterparts. Based on a comparative case study of French and American...... IR research from 1950 to 2011, the book is a major contribution to the meta-IR literature on global, regional and national traditions of IR. The challenge to the French discipline of whether and how to position itself in relation to the evolving American discipline is in many ways exemplary for other...

  15. [Sport-related concussion].

    Science.gov (United States)

    Bonfanti, Silvia; Duthon, Victoria; Ziltener, Jean-Luc; Menetrey, Jacques

    2017-07-12

    Sport-related concussion is a frequent and complex pathology whose physiopathological mechanisms are not completely understood yet. A recent consensus statement has been published with the objective to provide practicioners with an overview of literature and give some guidelines based on the current state of knowledge. An 11R approach (Recognise, Remove, Re-evaluate, Rest, Rehabilitation, Refer, Recover, Return to sport, Reconsider, Residual effects and sequelae, Risk reduction) is proposed to evaluate and manage sport-related concussion. There is currently no available test predicting recovery, but the risk factors for a slow recovery are now known. Return to daily activities (as school) and to full sport participation should follow the graduated return-to-school or - sport strategy, and the ultimate decision is clinically based, and made by the physician.

  16. Modelling dense relational data

    DEFF Research Database (Denmark)

    Herlau, Tue; Mørup, Morten; Schmidt, Mikkel Nørgaard

    2012-01-01

    Relational modelling classically consider sparse and discrete data. Measures of influence computed pairwise between temporal sources naturally give rise to dense continuous-valued matrices, for instance p-values from Granger causality. Due to asymmetry or lack of positive definiteness they are no......Relational modelling classically consider sparse and discrete data. Measures of influence computed pairwise between temporal sources naturally give rise to dense continuous-valued matrices, for instance p-values from Granger causality. Due to asymmetry or lack of positive definiteness...... they are not naturally suited for kernel K-means. We propose a generative Bayesian model for dense matrices which generalize kernel K-means to consider off-diagonal interactions in matrices of interactions, and demonstrate its ability to detect structure on both artificial data and two real data sets....

  17. Offentlighed og Public Relations

    Directory of Open Access Journals (Sweden)

    Lars Heltoft

    1993-09-01

    Full Text Available Lars Heltoft, der er en af grundlæggerne af Public Relationsuddannelsen på Roskilde Universitetscenter, kaster i artiklen et kritisk blik på den akademiske forskning i feltet public relations. Selv i nyere udgaver af PR-forskningen - af mange anset for "progressive", f.eks. James Grunings og Jon Whites arbejder - ser Lars Heltoft tydelige spor af PR- professionens selvforståelse og legitimationsbehov. Resultatet er, at den "offentlighed", der burde være kernen i den videnskabelige beskæftigelse med public relations, "forsvinder i den blå luft". Han argumenterer for, at Habermas´ forestilling om "offentlighed" stadig institutionaliserer mulig- heden for kritisk diskurs inden for feltet, samtidig med at han i sproghand- lingsteoretisk perspektiv problematiserer Habermas´ legitimationsbegreb, fordi det undtager private virksomheder og organisationer.

  18. Human Relations-skolen

    DEFF Research Database (Denmark)

    Scheuer, Steen

    2014-01-01

    Human Relations-skolen er en samlebetegnelse for to forskningsretninger, som tilsammen bidrog som nogle af de første til at indkredse og belyse de mellemmenneskelige relationers betydning for motivation og trivsel i arbejdslivet, og som skulle få stor ind"ydelse ikke bare på organisationsteorien......, men også arbejdssociologien, arbejdspsykologien og human resource development. Den første retning udsprang af de såkaldte Hawthorne-eksperimenter og psykologen Elton Mayos bearbejdelse af resultaterne derfra. Den anden er en løsere gruppering bestående af navne som Abraham Maslow og Frederick Herzberg......, som formulerede en række teorier og modeller om menneskets motivation, trivsel og behov i arbejdslivet. Selvom de ikke nødvendigvis relaterede sig til hinandens arbejde, er de forskellige bidragsydere i dag kendt som repræsentanter for den paradigmatiske betegnelse Human Relations. Undertiden skelnes...

  19. Very special relativity.

    Science.gov (United States)

    Cohen, Andrew G; Glashow, Sheldon L

    2006-07-14

    By very special relativity (VSR) we mean descriptions of nature whose space-time symmetries are certain proper subgroups of the Poincaré group. These subgroups contain space-time translations together with at least a two-parameter subgroup of the Lorentz group isomorphic to that generated by K(x) + J(y) and K(y)- J(x). We find that VSR implies special relativity (SR) in the context of local quantum field theory or of conservation. Absent both of these added hypotheses, VSR provides a simulacrum of SR for which most of the consequences of Lorentz invariance remain wholly or essentially intact, and for which many sensitive searches for departures from Lorentz invariance must fail. Several feasible experiments are discussed for which Lorentz-violating effects in VSR may be detectable.

  20. Relative value health insurance.

    Science.gov (United States)

    Korobkin, Russell

    2014-04-01

    Increases in health costs continue to outpace general inflation, and implementation of the Patient Protection and Affordable Care Act will exacerbate the problem by adding more Americans to the ranks of the insured. The most commonly proposed solutions--bureaucratic controls, greater patient cost sharing, and changes to physician incentives--all have substantial weaknesses. This article proposes a new paradigm for rationalizing health care expenditures called "relative value health insurance," a product that would enable consumers to purchase health insurance that covers cost-effective treatments but excludes cost-ineffective treatments. A combination of legal and informational impediments prevents private insurers from marketing this type of product today, but creative use of comparative effectiveness research, funded as a part of health care reform, could make relative value health insurance possible. Data deficits, adverse selection risks, and heterogeneous values among consumers create obstacles to shifting the health insurance system to this paradigm, but they could be overcome.

  1. Elements of general relativity

    Science.gov (United States)

    Agakov, Vsevolod G.; Zel'Manov, Abram L.

    The main principles of general relativity (GR) are expounded, and some of its astronomical applications are discussed. Particular emphasis is placed on mathematical methods of GR developed by Zel'manov, i.e., methods of chronometrically and kinemetrically invariant quantities, and the orthometric form of the monad formalism. The application of Zel'manov's methods to problems of relativistic cosmology are considered, and a semiinverse method for solving the Einstein gravitation equations is developed.

  2. Work related shoulder disorders

    DEFF Research Database (Denmark)

    Svendsen, Susanne Wulff; Bonde, Jens Peter; Mathiassen, S.E.

    2004-01-01

    Aims: To determine quantitative exposure-response relations between work with highly elevated arms and supraspinatus tendinitis, shoulder pain with disability, and shoulder pain without disability. Methods: A cross sectional study was conducted in a historical cohort of 1886 males from three occu...... between current work with highly elevated arms and clinically verified shoulder disorders. Substantial long term cumulative effects were not shown. A potential for primary prevention was revealed....

  3. Statin-related myotoxicity

    OpenAIRE

    Fernandes, V; Santos, MJ; Pérez, A.

    2016-01-01

    Statin therapy has a very important role in decreasing cardiovascular risk, and treatment non-compliance may therefore be a concern in high cardiovascular risk patients. Myotoxicity is a frequent side effect of statin therapy and one of the main causes of statin discontinuation, which limits effective treatment of patients at risk of or with cardiovascular disease. Because of the high proportion of patients on statin treatment and the frequency of statin-related myotoxicity, this is a subject...

  4. relation in spherical systems

    Indian Academy of Sciences (India)

    D. Bhattacharyya

    2018-02-09

    Feb 9, 2018 ... Abstract. To investigate the M• − σ relation, we consider realistic elliptical galaxy profiles that are taken to follow a single power-law density profile given by ρ(r) = ρ0(r/r0)−γ or the Nuker intensity profile. We calculate the density using Abel's formula in the latter case by employing the derived stellar potential; ...

  5. Einstein's Relativity as Ethnomathematics

    OpenAIRE

    Popov, Michael

    2013-01-01

    Mathematics and Physics are different research cultures. In comparison with mathematicians, physicists in some cases try to simplify and to introduce new cultural context into conventional pure mathematics. Cross-cultural differences between these cultures can be essential and some attempts to do alternative mathematics in the physical academic context could be defined as the new fields of ethnomathematics. Einstein’s Relativity as this kind of ethnomathematics is the first considered .

  6. Relational Propositions in Discourse.

    Science.gov (United States)

    1983-11-01

    establishment. 6. I like Japanese food. 7. I do not mind eating raw fish. 8. I am partial to Japanese beer. 9. I can use chopsticks . Notice that the...Thus, CHARACTERIZING RELATIONAL PROPOSITIONS 11 for example, the propositions that I like Japanese food or that I can use chopsticks from text 3...depend on whether I like Japanese food or can use chopsticks . I might. for example, rather dislike Japanese food, but be willing to go to the Fuji Gardens

  7. Relativity and accelerator engineering

    Energy Technology Data Exchange (ETDEWEB)

    Geloni, Gianluca [European XFEL GmbH, Schenefeld (Germany); Kocharyan, Vitali; Saldin, Evgeni [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2017-09-15

    From a geometrical viewpoint, according to the theory of relativity, space and time constitute a four-dimensional continuum with pseudo-Euclidean structure. This has recently begun to be a practically important statement in accelerator physics. An X-ray Free Electron Laser (XFEL) is in fact the best, exciting example of an engineering system where improvements in accelerator technology makes it possible to develop ultrarelativistic macroscopic objects with an internal fine structure, and the theory of relativity plays an essential role in their description. An ultrarelativistic electron bunch modulated at nanometer-scale in XFELs has indeed a macroscopic finite-size of order of 10 μm. Its internal, collective structure is characterized in terms of a wave number vector. Here we will show that a four-dimensional geometrical approach, unusual in accelerator physics, is needed to solve problems involving the emission of radiation from an ultrarelativistic modulated electron beam accelerating along a curved trajectory. We will see that relativistic kinematics enters XFEL physics in a most fundamental way through the so-called Wigner rotation of the modulation wave number vector, which is closely associated to the relativity of simultaneity. If not taken into account, relativistic kinematics effects would lead to a strong qualitative disagreement between theory and experiments. In this paper, several examples of relativistic kinematics effects, which are important for current and future XFEL operation, are studied. The theory of relativity is applied by providing details of the clock synchronization procedure within the laboratory frame. This approach, exploited here but unusual in literature, is rather ''practical'', and should be acceptable to accelerator physicists.

  8. Dasatinib-related chylothorax.

    Science.gov (United States)

    Huang, Yen Min; Wang, Cheng Hsu; Huang, Jen Seng; Yeh, Kun Yun; Lai, Chien Hong; Wu, Tsung Han; Chang, Pei Hung; Chang, Pei Hung; Chang, Yueh Shih; Lan, Yii Jenq

    2015-03-05

    Dasatinib is a potent second-generation tyrosine kinase inhibitor for the treatment of chronic myeloid leukemia. The most common adverse event associated with dasatinib therapy is fluid retention, including pleural effusion. Dasatinib-related chylothorax has rarely been reported. The clinical manifestations, pathophysiology, management, and prognosis are not fully understood. Here we report a 40-year-old woman presenting with chylothorax following dasatinib use. We propose the hypothesis of its mechanism as well as offering a review of the relevant literature.

  9. Sleep related vehicle accidents.

    Science.gov (United States)

    Horne, J A; Reyner, L A

    1995-03-04

    To assess the incidence, time of day, and driver morbidity associated with vehicle accidents where the most likely cause was the driver falling asleep at the wheel. Two surveys were undertaken, in southwest England and the midlands, by using police databases or on the spot interviews. Drivers involved in 679 sleep related vehicle accidents. Of all vehicle accidents to which the police were summoned, sleep related vehicle accidents comprised 16% on major roads in southwest England, and over 20% on midland motorways. During the 24 hour period there were three major peaks: at around 0200, 0600, and 1600. About half these drivers were men under 30 years; few such accidents involved women. Sleep related vehicle accidents are largely dependent on the time of day and account for a considerable proportion of vehicle accidents, especially those on motorways and other monotonous roads. As there are no norms for the United Kingdom on road use by age and sex for time of day with which to compare these data, we cannot determine what the hourly exposure v risk factors are for these subgroups. The findings are in close agreement with those from other countries.

  10. Statin-related myotoxicity.

    Science.gov (United States)

    Fernandes, Vera; Santos, Maria Joana; Pérez, Antonio

    2016-05-01

    Statin therapy has a very important role in decreasing cardiovascular risk, and treatment non-compliance may therefore be a concern in high cardiovascular risk patients. Myotoxicity is a frequent side effect of statin therapy and one of the main causes of statin discontinuation, which limits effective treatment of patients at risk of or with cardiovascular disease. Because of the high proportion of patients on statin treatment and the frequency of statin-related myotoxicity, this is a subject of concern in clinical practice. However, statin-related myotoxicity is probably underestimated because there is not a gold standard definition, and its diagnosis is challenging. Moreover, information about pathophysiology and optimal therapeutic options is scarce. Therefore, this paper reviews the knowledge about the definition, pathophysiology and predisposing conditions, diagnosis and management of statin-related myotoxicity, and provides a practical scheme for its management in clinical practice. Copyright © 2016 SEEN. Published by Elsevier España, S.L.U. All rights reserved.

  11. Forces in general relativity

    Science.gov (United States)

    Ridgely, Charles T.

    2010-07-01

    Many textbooks dealing with general relativity do not demonstrate the derivation of forces in enough detail. The analyses presented herein demonstrate straightforward methods for computing forces by way of general relativity. Covariant divergence of the stress-energy-momentum tensor is used to derive a general expression of the force experienced by an observer in general coordinates. The general force is then applied to the local co-moving coordinate system of a uniformly accelerating observer, leading to an expression of the inertial force experienced by the observer. Next, applying the general force in Schwarzschild coordinates is shown to lead to familiar expressions of the gravitational force. As a more complex demonstration, the general force is applied to an observer in Boyer-Lindquist coordinates near a rotating, Kerr black hole. It is then shown that when the angular momentum of the black hole goes to zero, the force on the observer reduces to the force on an observer held stationary in Schwarzschild coordinates. As a final consideration, the force on an observer moving in rotating coordinates is derived. Expressing the force in terms of Christoffel symbols in rotating coordinates leads to familiar expressions of the centrifugal and Coriolis forces on the observer. It is envisioned that the techniques presented herein will be most useful to graduate level students, as well as those undergraduate students having experience with general relativity and tensor analysis.

  12. Cricket related maxillofacial fractures.

    Science.gov (United States)

    Lee, Kai

    2012-06-01

    Cricket is a popular sport in New Zealand, enjoyed both at social and competitive level. Although it is a non-contact sport and there is in place good facial protection, injury to the head and neck region is still frequently seen in the emergency department. Data were collected from departmental records between 1996 and 2006. Variables examined included incidence, demographics, site of fracture and treatment method. Of the 561 patients with sports-related maxillofacial fractures during the study period, 40 were cricket-related. Male to female ratio was 36:1. 45% of patients were in the 16-30 year age group. 55% of injuries were due to impact from cricket ball. 70% of injuries occurred at midface level, while 30% at the mandible. 38% of patients required surgery and hospitalization. Maxillofacial fracture from cricket playing is a frequent injury in patients presenting with sports-related injuries. Cricket players need to be educated on the safety measures in playing the sport, including facial protection devices.

  13. Relativities of fundamentality

    Science.gov (United States)

    McKenzie, Kerry

    2017-08-01

    S-dualities have been held to have radical implications for our metaphysics of fundamentality. In particular, it has been claimed that they make the fundamentality status of a physical object theory-relative in an important new way. But what physicists have had to say on the issue has not been clear or consistent, and in particular seems to be ambiguous between whether S-dualities demand an anti-realist interpretation of fundamentality talk or merely a revised realism. This paper is an attempt to bring some clarity to the matter. After showing that even antecedently familiar fundamentality claims are true only relative to a raft of metaphysical, physical, and mathematical assumptions, I argue that the relativity of fundamentality inherent in S-duality nevertheless represents something new, and that part of the reason for this is that it has both realist and anti-realist implications for fundamentality talk. I close by discussing the broader significance that S-dualities have for structuralist metaphysics and for fundamentality metaphysics more generally.

  14. General Relativity and Gravitation

    Science.gov (United States)

    Ashtekar, Abhay; Berger, Beverly; Isenberg, James; MacCallum, Malcolm

    2015-07-01

    Part I. Einstein's Triumph: 1. 100 years of general relativity George F. R. Ellis; 2. Was Einstein right? Clifford M. Will; 3. Cosmology David Wands, Misao Sasaki, Eiichiro Komatsu, Roy Maartens and Malcolm A. H. MacCallum; 4. Relativistic astrophysics Peter Schneider, Ramesh Narayan, Jeffrey E. McClintock, Peter Mészáros and Martin J. Rees; Part II. New Window on the Universe: 5. Receiving gravitational waves Beverly K. Berger, Karsten Danzmann, Gabriela Gonzalez, Andrea Lommen, Guido Mueller, Albrecht Rüdiger and William Joseph Weber; 6. Sources of gravitational waves. Theory and observations Alessandra Buonanno and B. S. Sathyaprakash; Part III. Gravity is Geometry, After All: 7. Probing strong field gravity through numerical simulations Frans Pretorius, Matthew W. Choptuik and Luis Lehner; 8. The initial value problem of general relativity and its implications Gregory J. Galloway, Pengzi Miao and Richard Schoen; 9. Global behavior of solutions to Einstein's equations Stefanos Aretakis, James Isenberg, Vincent Moncrief and Igor Rodnianski; Part IV. Beyond Einstein: 10. Quantum fields in curved space-times Stefan Hollands and Robert M. Wald; 11. From general relativity to quantum gravity Abhay Ashtekar, Martin Reuter and Carlo Rovelli; 12. Quantum gravity via unification Henriette Elvang and Gary T. Horowitz.

  15. Teleseismic magnitude relations

    Directory of Open Access Journals (Sweden)

    Markus Båth

    2010-02-01

    Full Text Available Using available sets of magnitude determinations, primarily from Uppsala seismological bulletin, various extensions are made of the Zurich magnitude recommendations of 1967. Thus, body-wave magnitude (m and surface-wave magnitudes (M are related to each other for 12 different earthquake regions as well as world-wide. Depth corrections for M are derived for all focal depths. Formulas are developed which permit calculation of M also from vertical component long-period seismographs. Body-wave magnitudes from broad-band and narrow-band short-period seismographs are compared and relations deduced. Applications are made both to underground nuclear explosions and to earthquakes. The possibilities of explosion-earthquake discrimination on the basis of magnitudes are examined, as well as the determination of explosive yield from magnitudes. For earthquakes, relations between magnitudes of main earthquakes and largest aftershocks are investigated. A world-wide station network for more homogeneous magnitude determinations is suggested in order to provide the necessary reference system.

  16. Lectures on general relativity

    CERN Document Server

    Papapetrou, Achille

    1974-01-01

    This book is an elaboration of lecture notes for the graduate course on General Rela­ tivity given by the author at Boston University in the spring semester of 1972. It is an introduction to the subject only, as the time available for the course was limited. The author of an introduction to General Relativity is faced from the beginning with the difficult task of choosing which material to include. A general criterion as­ sisting in this choice is provided by the didactic character of the book: Those chapters have to be included in priority, which will be most useful to the reader in enabling him to understand the methods used in General Relativity, the results obtained so far and possibly the problems still to be solved. This criterion is not sufficient to ensure a unique choice. General Relativity has developed to such a degree, that it is impossible to include in an introductory textbook of a reasonable length even a very condensed treatment of all important problems which have been discussed unt...

  17. Relative permeability through fractures

    Energy Technology Data Exchange (ETDEWEB)

    Diomampo, Gracel, P.

    2001-08-01

    The mechanism of two-phase flow through fractures is of importance in understanding many geologic processes. Currently, two-phase flow through fractures is still poorly understood. In this study, nitrogen-water experiments were done on both smooth and rough parallel plates to determine the governing flow mechanism for fractures and the appropriate methodology for data analysis. The experiments were done using a glass plate to allow visualization of flow. Digital video recording allowed instantaneous measurement of pressure, flow rate and saturation. Saturation was computed using image analysis techniques. The experiments showed that gas and liquid phases flow through fractures in nonuniform separate channels. The localized channels change with time as each phase path undergoes continues breaking and reforming due to invasion of the other phase. The stability of the phase paths is dependent on liquid and gas flow rate ratio. This mechanism holds true for over a range of saturation for both smooth and rough fractures. In imbibition for rough-walled fractures, another mechanism similar to wave-like flow in pipes was also observed. The data from the experiments were analyzed using Darcy's law and using the concept of friction factor and equivalent Reynold's number for two-phase flow. For both smooth- and rough-walled fractures a clear relationship between relative permeability and saturation was seen. The calculated relative permeability curves follow Corey-type behavior and can be modeled using Honarpour expressions. The sum of the relative permeabilities is not equal one, indicating phase interference. The equivalent homogeneous single-phase approach did not give satisfactory representation of flow through fractures. The graphs of experimentally derived friction factor with the modified Reynolds number do not reveal a distinctive linear relationship.

  18. Theory of relations

    CERN Document Server

    Fraïssé, R

    2011-01-01

    The first part of this book concerns the present state of the theory of chains (= total or linear orderings), in connection with some refinements of Ramsey's theorem, due to Galvin and Nash-Williams. This leads to the fundamental Laver's embeddability theorem for scattered chains, using Nash-Williams' better quasi-orderings, barriers and forerunning.The second part (chapters 9 to 12) extends to general relations the main notions and results from order-type theory. An important connection appears with permutation theory (Cameron, Pouzet, Livingstone and Wagner) and with logics (existence criter

  19. Relational Information Gain

    DEFF Research Database (Denmark)

    Lippi, Marco; Jaeger, Manfred; Frasconi, Paolo

    2011-01-01

    We introduce relational information gain, a refinement scoring function measuring the informativeness of newly introduced variables. The gain can be interpreted as a conditional entropy in a well-defined sense and can be efficiently approximately computed. In conjunction with simple greedy general......-to-specific search algorithms such as FOIL, it yields an efficient and competitive algorithm in terms of predictive accuracy and compactness of the learned theory. In conjunction with the decision tree learner TILDE, it offers a beneficial alternative to lookahead, achieving similar performance while significantly...

  20. Dasatinib-Related Chylothorax

    Directory of Open Access Journals (Sweden)

    Yen Min Huang

    2015-03-01

    Full Text Available Dasatinib is a potent second-generation tyrosine kinase inhibitor for the treatment of chronic myeloid leukemia. The most common adverse event associated with dasatinib therapy is fluid retention, including pleural effusion. Dasatinib-related chylothorax has rarely been reported. The clinical manifestations, pathophysiology, management, and prognosis are not fully understood. Here we report a 40-year-old woman presenting with chylothorax following dasatinib use. We propose the hypothesis of its mechanism as well as offering a review of the relevant literature.

  1. Analysing international relations

    DEFF Research Database (Denmark)

    Corry, Olaf

    2014-01-01

    theories to ‘explain’ international relations and distinguishes between different kinds of explanation. In Section 4 I look at how different theories have been grouped – first according to their underlying views of what is valid knowledge, and second in terms of different accounts of how history works....... matters by depicting reality in new ways. I then show how different theories rely on different ‘pictures’ of what makes up the international system. Section 2 shows how theories differ in terms of their scope, their aims and their purposes. Section 3 explores some of the choices to be made when using...

  2. Age-related infertility.

    Science.gov (United States)

    Crawford, Natalie M; Steiner, Anne Z

    2015-03-01

    Oocyte number and quality decrease with advancing age. Thus, fecundity decreases as age increases, with a more rapid decline after the mid-30s. Patients more than 35 years old should receive prompt evaluation for causes of infertility after no more than 6 months of attempted conception. Patients with abnormal tests of ovarian reserve have a poorer prognosis and may need more expedited and aggressive treatment. Although oocyte donation is the best method to overcome age-related infertility, other treatment options may help women proceed quicker toward pregnancy. Patients at an advanced age should be counseled and evaluated before undergoing infertility treatments. Copyright © 2015 Elsevier Inc. All rights reserved.

  3. Relativity of Electric Quantity

    Directory of Open Access Journals (Sweden)

    GAO Zhong-wen

    2017-04-01

    Full Text Available The demonstration foundation,which is used to demonstrate that observed values from the interaction force between two charges,which are not at the same point would be different in different reference frames,is that the transmission of the interaction between charges needs time. Firstly,this paper analyzes the foundation of hypothetical process that the electric field and the magnetic field are built by one charge,and then the electromagnetic field would be transferred to another charge in vacuo by the speed of light,and produces force. It points out that from the simultaneity of relativity,the force applied to charge would occur in different time in the different reference frames,the force would be neither in the same size nor in the opposite direction,and Newton’s Third Law is not valid longer, the deeper cause of these conclusions would be known. On this basis,this paper gives the basis that force would keep invariant in different reference frames,and according to this condition,with the situation of the charge that under the Coulombian force and electromagnetism,the relative form of expression and demonstration methods of electric quantity in different reference frames are given. On the basis of the hypothesis that force would keep invariant in different reference frames,with the similar derivation process,the mass relativity equation of Einstein would be obtained.

  4. Discriminative Relational Topic Models.

    Science.gov (United States)

    Chen, Ning; Zhu, Jun; Xia, Fei; Zhang, Bo

    2015-05-01

    Relational topic models (RTMs) provide a probabilistic generative process to describe both the link structure and document contents for document networks, and they have shown promise on predicting network structures and discovering latent topic representations. However, existing RTMs have limitations in both the restricted model expressiveness and incapability of dealing with imbalanced network data. To expand the scope and improve the inference accuracy of RTMs, this paper presents three extensions: 1) unlike the common link likelihood with a diagonal weight matrix that allows the-same-topic interactions only, we generalize it to use a full weight matrix that captures all pairwise topic interactions and is applicable to asymmetric networks; 2) instead of doing standard Bayesian inference, we perform regularized Bayesian inference (RegBayes) with a regularization parameter to deal with the imbalanced link structure issue in real networks and improve the discriminative ability of learned latent representations; and 3) instead of doing variational approximation with strict mean-field assumptions, we present collapsed Gibbs sampling algorithms for the generalized relational topic models by exploring data augmentation without making restricting assumptions. Under the generic RegBayes framework, we carefully investigate two popular discriminative loss functions, namely, the logistic log-loss and the max-margin hinge loss. Experimental results on several real network datasets demonstrate the significance of these extensions on improving prediction performance.

  5. Relativity free of coordinates

    CERN Document Server

    Wagner, Serge A

    2016-01-01

    The concept of an inertial reference frame, which actualizes Euclidean geometry, is not confined to the statics of solids but extendible to the phenomena where Newtonian mechanics is valid, defining its concept of time. The laws of propagation of electromagnetic waves modify Newtonian formalism for fast free motions within each spatial domain of its validity for slow motions and introduce the extended concept of time by uniting those of Newtonian which can exist in different spatial domains of their validity. A boost direction for a pair of frames is that spatial direction in one frame along which the other frame moves. Free motions of point particles make an instrumentation for identifying the boost direction as well as events on a straight line along that direction. The concept of a boost direction secures the physics-based formulation of the basic relativity effects, which eventually results in the relation between two arbitrary frames in terms of their position vectors and time moments for a given event. ...

  6. What is general relativity?

    Science.gov (United States)

    Coley, Alan A.; Wiltshire, David L.

    2017-05-01

    General relativity is a set of physical and geometric principles, which lead to a set of (Einstein) field equations that determine the gravitational field and to the geodesic equations that describe light propagation and the motion of particles on the background. But open questions remain, including: what is the scale on which matter and geometry are dynamically coupled in the Einstein equations? Are the field equations valid on small and large scales? What is the largest scale on which matter can be coarse grained while following a geodesic of a solution to Einstein’s equations? We address these questions. If the field equations are causal evolution equations, whose average on cosmological scales is not an exact solution of the Einstein equations, then some simplifying physical principle is required to explain the statistical homogeneity of the late epoch Universe. Such a principle may have its origin in the dynamical coupling between matter and geometry at the quantum level in the early Universe. This possibility is hinted at by diverse approaches to quantum gravity which find a dynamical reduction to two effective dimensions at high energies on one hand, and by cosmological observations which are beginning to strongly restrict the class of viable inflationary phenomenologies on the other. We suggest that the foundational principles of general relativity will play a central role in reformulating the theory of spacetime structure to meet the challenges of cosmology in the 21st century.

  7. Authenticity in Employment Relations

    DEFF Research Database (Denmark)

    Tackney, Charles Thomas

    This research takes up the concept of authenticity as a criterion variable for theology of the workplace analysis, a domain which explores employment parameters in light of religious teaching on the social question at national, organizational or firm-specific levels. Following a review of the con......This research takes up the concept of authenticity as a criterion variable for theology of the workplace analysis, a domain which explores employment parameters in light of religious teaching on the social question at national, organizational or firm-specific levels. Following a review......, it becomes possible to specify employment relations parameters between the indirect and direct employer and employees in a manner that will ensure working conditions consistent with these traditions, substantially enhancing the prospect of authenticity in employment relations. This theology of the workplace...... analysis should complement and support corporate social responsibility, management spirituality, authentic leadership / authentic follower, and other secular research by offering a research methods bridge between empirically grounded theology and secular studies, with the common goal of improving workplace...

  8. HIV-related diarrhoea.

    Science.gov (United States)

    Kelly, P

    1998-02-01

    Common causes of persistent diarrhea, diarrhea which lasts for more than 2 weeks, in developing countries include infection with protozoans, bacteria, and viruses. The cause of HIV-related diarrhea varies from one area to another. Persistent diarrhea is more common among people who have advanced HIV disease than among those who do not, and is a major problem for many people with HIV/AIDS. The main dangers of diarrhea are dehydration and malnutrition. People with HIV-related diarrhea can become malnourished and lose weight quickly, mainly because they do not eat well due to poor appetite. Moreover, since weight loss is associated with HIV infection, people with diarrhea may be assumed to have HIV, and be stigmatized. Good hygiene and nutrition are the best ways to prevent diarrhea. While drinking boiled water is recommended, it is often not practical. Washing hands frequently with soap is a more practical prevention strategy. Other prevention strategies include storing food under a cover; washing eating and cooking utensils; washing raw fruit and vegetables; disposing of waste properly; and keeping anything dirty, such as soiled bedding, out of the reach of children. Nutritious, readily digestible food is also needed to prevent and treat diarrhea. Treatment recommendations are offered, as well as a guide to eating well.

  9. A logic road from special relativity to general relativity

    OpenAIRE

    Andréka, Hajnal; Madarász, Judit X.; Németi, István; Székely, Gergely

    2010-01-01

    We present a streamlined axiom system of special relativity in first-order logic. From this axiom system we "derive" an axiom system of general relativity in two natural steps. We will also see how the axioms of special relativity transform into those of general relativity. This way we hope to make general relativity more accessible for the non-specialist.

  10. Uruguay in International Relations

    Directory of Open Access Journals (Sweden)

    Anton Sergeevich Andreev

    2015-12-01

    Full Text Available This article analyzes the foreign policy of the leftist government of Uruguay at the beginning of the XXI century. Latin America is an important actor in the process of creating a multipolar world, and Uruguay becomes one of the political and economic centers of the continent. One of the important political processes in South America is a regional integration which has many forms. This article shows the main areas of Uruguay diplomacy in various integration formations of the region. Based on the analysis of the program of the third government of “Broad Front” article shows the goals and objectives of the country in the processes of regional integration, the problems and prospects of these processes. The author notes that the Government of Uruguay is looking for creating common political and economic institutions for the united Latin American continent. In the new political and economic conditions Uruguay becomes important partner for the BRICS countries as well as for the EU and the United States. The article shows the prospects for Uruguay in the BRICS in the context of changing the place of developing countries in the architecture of the global world, as well as in the context of the participation of ex-President Jose Mujica in the BRICS summit 2014. Currently, Uruguay is standing in front of a political choice, because the country has people who want the development of relations with the United States as economic partner and political center of the region. Also in Uruguay are supporters of the development of relations with the EU. The paper shows the tasks and objectives of Uruguay's foreign policy towards the US and the EU, as well as a place of Uruguay in the foreign policy of major actors of international relations. The article says the prospects for the foreign policy of Uruguay in the context of the presidential and parliamentary elections in 2014, a new government and the conservation status of Uruguay as a country of “left turn

  11. Poland- Ukraine Relations

    Directory of Open Access Journals (Sweden)

    Andrzej Szeptycki

    2016-01-01

    Full Text Available Poland and Ukraine are the two biggest and most populated countries of Central and Eastern Europe. Because of their size, neighbourhood and position in the region the two countries have often been compared to France and Germany. Both countries are deeply interested in their mutual cooperation. Such situation steams from five factors: direct neighbourhood, common (albeit difficult history, attractiveness of the Polish labour market for the Ukrainians, membership of Poland in the Western structures, and last but not least, the Russian threat. Despite complimentary interests, both countries have difficulty to effectively develop their mutual relations and turn them into a real “strategic partnership”. These problems are due to the internal political and economic situation in Ukraine, limits imposed by the membership of Poland in the EU, Russian policy aiming at keeping Ukraine within its zone of influence and, finally, the EU reluctance to effectively engage in Ukraine.

  12. [Sleep related movement disorders].

    Science.gov (United States)

    Suzuki, Keisuke; Miyamoto, Masayuki; Miyamoto, Tomoyuki; Hirata, Koichi

    2015-06-01

    Sleep related movement disorders (SRMD) are characterized by simple, stereotyped movements occur during sleep, with the exception of restless legs syndrome (RLS). RLS has the following essential features; an urge to move the legs usually accompanied by uncomfortable sensation in the legs, improvement of symptoms after movement (non-stereotypical movements, such as walking and stretching, to reduce symptoms), and symptoms occur or worsen during periods of rest and in the evening and night. However, RLS is closely associated with periodic limb movement, which shows typical stererotyped limb movements. In the International Classification of Sleep Disorders, 3rd edition, sleep disturbances or daytime symptoms are prerequiste for a diagnosis of SRMD. We here review diagnosis and treatment of SRMD.

  13. Amphetamine derivative related deaths.

    Science.gov (United States)

    Lora-Tamayo, C; Tena, T; Rodríguez, A

    1997-02-28

    Amphetamine its methylendioxy (methylendioxyamphetamine methylenedioxymethylamphetamine, methylenedioxyethylamphetamine) and methoxy derivatives (p-methoxyamphetamine and p-methoxymethylamphetamine) are widely abused in Spanish society. We present here the results of a systematic study of all cases of deaths brought to the attention of the Madrid department of the Instituto Nacional de Toxicologia from 1993 to 1995 in which some of these drugs have been found in the cadaveric blood. The cases were divided into three categories: amphetamine and derivatives, amphetamines and alcohol, amphetamines and other drugs. Data on age, sex, clinical symptoms, morphological findings, circumstances of death, when known, and concentration of amphetamine derivatives, alcohol and other drugs in blood are given for each group. The information provided here may prove to be useful for the forensic interpretation of deaths which are directly or indirectly related to abuse of amphetamine derivatives.

  14. Introduction to general relativity

    CERN Document Server

    Parthasarthy, R

    2016-01-01

    INTRODUCTION TO GENERAL RELATIVITY begins with a description of the geometry of curved space, explaining geodesics, parallel transport, covariant differentiation, geodesic deviation and spacetime symmetry by killing vectors. It then introduces Einstein's theory of gravitation followed by Schwarzschild solution with its relevance to Positive Mass theorem. The three tests for Einstein's gravity are explained. Other exact solutions such as Vaidya, Kerr and Reisner - Nordstrom metric are included. In the Chapter on cosmological solutions, a detailed description of Godel metric is provided. It then introduces five dimensional spacetime of Kaluza showing the unification of gravity with electromagnetism. This is extended to include non-Abelian gauge theory by invoking compact extra dimensions. Explicit expressions in this case for Christoffel connections and ricci tensor are derived and the higher dimensional gravity action is shown to compactification are given.

  15. Sleep-related laryngospasm

    Directory of Open Access Journals (Sweden)

    Flavio S. Aloe

    1995-03-01

    Full Text Available Seven patients (mean age 46.6; range 33-58; 6M.1F presented with sleep-related choking episodes and were found to have features in common that distinguished them from other known causes of choking episodes during sleep. The characteristic features include: an awakening from sleep with an acute choking sensation, stridor, panic, tachycardia, short duration of episode Gess than 60 seconds, infrequent episodes (typically less than 1 per month, and absence of any known etiology. The disorder most commonly occurs in middle-aged males who are otherwise healthy. In one patient an episode of laryngospasm was polysomnographically documented to occur during stage 3. The clinical features and the polysomnographic findings suggest spasm of the vocal cords of unknown etiology.

  16. Relative constraints and evolution

    Science.gov (United States)

    Ochoa, Juan G. Diaz

    2014-03-01

    Several mathematical models of evolving systems assume that changes in the micro-states are constrained to the search of an optimal value in a local or global objective function. However, the concept of evolution requires a continuous change in the environment and species, making difficult the definition of absolute optimal values in objective functions. In this paper, we define constraints that are not absolute but relative to local micro-states, introducing a rupture in the invariance of the phase space of the system. This conceptual basis is useful to define alternative mathematical models for biological (or in general complex) evolving systems. We illustrate this concept with a modified Ising model, which can be useful to understand and model problems like the somatic evolution of cancer.

  17. Notes on relatively hyperbolic groups and relatively quasiconvex subgroups

    OpenAIRE

    Matsuda, Yoshifumi; Oguni, Shin-ichi; Yamagata, Saeko

    2013-01-01

    We define relatively quasiconvex subgroups of relatively hyperbolic groups in the sense of Osin and show that such subgroups have expected properties. Also we state several definitions equivalent to the definition of relatively hyperbolic groups in the sense of Osin.

  18. Fuel related risks; Braenslerisker

    Energy Technology Data Exchange (ETDEWEB)

    Englund, Jessica; Sernhed, Kerstin; Nystroem, Olle; Graveus, Frank (Grontmij AB, (Sweden))

    2012-02-15

    The project, within which this work report was prepared, aimed to complement the Vaermeforsk publication 'Handbook of fuels' on fuel related risks and measures to reduce the risks. The fuels examined in this project where the fuels included in the first version of the handbook from 2005 plus four additional fuels that will be included in the second and next edition of the handbook. Following fuels were included: woodfuels (sawdust, wood chips, powder, briquettes), slash, recycled wood, salix, bark, hardwood, stumps, straw, reed canary grass, hemp, cereal, cereal waste, olive waste, cocoa beans, citrus waste, shea, sludge, forest industrial sludge, manure, Paper Wood Plastic, tyre, leather waste, cardboard rejects, meat and bone meal, liquid animal and vegetable wastes, tall oil pitch, peat, residues from food industry, biomal (including slaughterhouse waste) and lignin. The report includes two main chapters; a general risk chapter and a chapter of fuel specific risks. The first one deals with the general concept of risk, it highlights laws and rules relevant for risk management and it discuss general risks that are related to the different steps of fuel handling, i.e. unloading, storing, processing the fuel, transportation within the facility, combustion and handling of ashes. The information that was used to produce this chapter was gathered through a literature review, site visits, and the project group's experience from risk management. The other main chapter deals with fuel-specific risks and the measures to reduce the risks for the steps of unloading, storing, processing the fuel, internal transportation, combustion and handling of the ashes. Risks and measures were considered for all the biofuels included in the second version in the handbook of fuels. Information about the risks and risk management was gathered through interviews with people working with different kinds of fuels in electricity and heat plants in Sweden. The information from

  19. On Allometry Relations

    Science.gov (United States)

    West, Damien; West, Bruce J.

    2012-07-01

    There are a substantial number of empirical relations that began with the identification of a pattern in data; were shown to have a terse power-law description; were interpreted using existing theory; reached the level of "law" and given a name; only to be subsequently fade away when it proved impossible to connect the "law" with a larger body of theory and/or data. Various forms of allometry relations (ARs) have followed this path. The ARs in biology are nearly two hundred years old and those in ecology, geophysics, physiology and other areas of investigation are not that much younger. In general if X is a measure of the size of a complex host network and Y is a property of a complex subnetwork embedded within the host network a theoretical AR exists between the two when Y = aXb. We emphasize that the reductionistic models of AR interpret X and Y as dynamic variables, albeit the ARs themselves are explicitly time independent even though in some cases the parameter values change over time. On the other hand, the phenomenological models of AR are based on the statistical analysis of data and interpret X and Y as averages to yield the empirical AR: = ab. Modern explanations of AR begin with the application of fractal geometry and fractal statistics to scaling phenomena. The detailed application of fractal geometry to the explanation of theoretical ARs in living networks is slightly more than a decade old and although well received it has not been universally accepted. An alternate perspective is given by the empirical AR that is derived using linear regression analysis of fluctuating data sets. We emphasize that the theoretical and empirical ARs are not the same and review theories "explaining" AR from both the reductionist and statistical fractal perspectives. The probability calculus is used to systematically incorporate both views into a single modeling strategy. We conclude that the empirical AR is entailed by the scaling behavior of the probability density

  20. Bellman goes Relational (extended abstract)

    NARCIS (Netherlands)

    van Otterlo, M.; Kersting, Kristian; De Raedt, Luc; Verbrugge, R.; Taatgen, N.; Schonmaker, L.

    2004-01-01

    We introduce REBEL, a relational Bellman update operator that can be used for Markov Decision Processes in - possibly infinite - relational domains. Using REBEL we develop a relational value iteration algorithm.

  1. Stakeholder Relations Office

    CERN Multimedia

    2013-01-01

    Scientists, politicians, the public, school children, our neighbours, you. All of these groups of people have a stake in CERN, and all are important to us.   The list of stakeholders in an organisation as large and complex as CERN is a long and ever lengthening one. Each group has its own specific interests and needs in terms of what kind of information it requires from CERN and how we should engage. It’s important, therefore, for us to ensure that we’re communicating optimally with everyone we care about and who cares about us. This is something that CERN has always taken seriously. The CERN Courier, for example, was first published in 1959 and we had a pro-active public information office right from the start. Today, our stakeholder relations are spread between several groups and teams, reflecting the nature of CERN today. But while we’re already doing a good job, I think we can do better by exploiting the synergies between these teams, and that’s wh...

  2. Relative Critical Points

    Directory of Open Access Journals (Sweden)

    Debra Lewis

    2013-05-01

    Full Text Available Relative equilibria of Lagrangian and Hamiltonian systems with symmetry are critical points of appropriate scalar functions parametrized by the Lie algebra (or its dual of the symmetry group. Setting aside the structures – symplectic, Poisson, or variational – generating dynamical systems from such functions highlights the common features of their construction and analysis, and supports the construction of analogous functions in non-Hamiltonian settings. If the symmetry group is nonabelian, the functions are invariant only with respect to the isotropy subgroup of the given parameter value. Replacing the parametrized family of functions with a single function on the product manifold and extending the action using the (coadjoint action on the algebra or its dual yields a fully invariant function. An invariant map can be used to reverse the usual perspective: rather than selecting a parametrized family of functions and finding their critical points, conditions under which functions will be critical on specific orbits, typically distinguished by isotropy class, can be derived. This strategy is illustrated using several well-known mechanical systems – the Lagrange top, the double spherical pendulum, the free rigid body, and the Riemann ellipsoids – and generalizations of these systems.

  3. Malnutrition related deaths.

    Science.gov (United States)

    Sparre-Sørensen, Maja; Kristensen, Gustav N

    2016-10-01

    Studies have shown that malnutrition increases the risk of morbidity, mortality, the length of hospital stay, and costs in the elderly population. Approximately one third of all patients admitted to geriatric wards in Denmark are malnourished according to the Danish Geriatric database. The aim of this study is to describe and examine the sudden increase in deaths due to malnutrition in the elderly population in Denmark from 1999 and, similarly, the sudden decline in malnutrition related deaths in 2007. A descriptive epidemiologic study was performed. All Danes listed in the national death registry who died from malnutrition in the period from 1994 to 2012 are included. The number of deaths from malnutrition increased significantly during the period from 1999 to 2007, especially in the age group 70 years and over. Additionally, we document a surprising similarity between the development in excess mortality from malnutrition in the five Danish regions during the same period. During the period 1999-2007 malnutrition was the direct cause of 340 extra deaths, and probably ten times more registered under other diseases. This development in excess mortality runs parallel in all five Danish regions over time. Copyright © 2016 European Society for Clinical Nutrition and Metabolism. Published by Elsevier Ltd. All rights reserved.

  4. Sports related to drowning

    Directory of Open Access Journals (Sweden)

    David Szpilman

    2016-09-01

    Full Text Available Aquatic sports are included in the top list of risky practices as the environment per se carries a possibility of death by drowning if not rescued in time. Not only are aquatic sports related to a high risk of death, but also all sports practiced on the water, over the water and on ice. Whatever the reason a person is in the water, drowning carries a higher possibility of death if the individual is unable to cope with the water situation, which may simply be caused by an inability to stay afloat and get out of the water or by an injury or disease that may lead to physical inability or unconsciousness. The competitive nature of sports is a common pathway that leads the sports person to exceed their ability to cope with the environment or simply misjudge their physical capability. Drowning involves some principles and medical interventions that are rarely found in other medical situations as it occurs in a deceptively hostile environment that may not seem dangerous. Therefore, it is essential that health professionals are aware of the complete sequence of action in drowning. This article focuses on the pulmonary injury in sports and recreational activities where drowning plays the major role.

  5. Sucrose and Related Oligosaccharides

    Science.gov (United States)

    Eggleston, Gillian

    Sucrose (α-D-glucopyranosyl-(1↔2)-β-D-fructofuranoside) is the most common low-molecular-weight sugar found in the plant kingdom. It is ubiquitously known as common table sugar and primarily produced industrially from sugarcane (Saccharum officinarum) and sugar beet (Beta vulgaris); the basics of the industrial manufacture of sucrose are outlined in this chapter. Commercial sucrose has a very high purity (> 99.9%) making it one of the purest organic substances produced on an industrial scale. Value-addition to sucrose via chemical and biotechnological reactions is becoming more important for the diversification of the sugar industry to maintain the industries' competitiveness in a world increasingly turning to a bio-based economy. The basis for the chemical reactivity of sucrose is the eight hydroxyl groups present on the molecule, although, sucrose chemical reactivity is regarded as difficult. Increasing use of enzymatic biotechnological techniques to derivatize sucrose is expected, to add special functionalities to sucrose products like biodegradability, biocompatibility, and non-toxicity. Analysis of sucrose by colorimetric, enzymatic, oxidation-reduction and chromatography methods are discussed. Oligosaccharides related to sucrose are outlined in detail and include sucrose-based plant, honey and in vitro oligosaccharides.

  6. [Chronotherapy and relativity theory].

    Science.gov (United States)

    Polishchuk, N A

    2008-01-01

    The course of time itself in alive organisms is treated from positions of the special theory of the relativity created by A. Einstein in 1905 and added by the Nobel winners H.A.Lorentsem, M. Plankom, M. fon Laue. These achievements of fundamental physics have been put in a basis of special medical technology "Resonant chronophytotherapy" (SMT RCPT) which is applied in practice of treatment of chronic diseases for 27 years. Grass tinctures in various dosages are used in SMT RCPT, which patients take once a day during precisely designated time. Parameters "dosage-time" daily vary. SMT RCPT have been conducted in treatment of epilepsy bronchial asthma, rheumatism, sclerodermia, hypertension, chronic glomerulonephritis, vegeto-vascular dystonia, female sterility, circular alopecia, vitiligo, eczema, psoriasis, onychomycosis. SMT RCPT does have adverse events, has no contra-indications to its use, directed, first of all, on elimination of nonspecific signs of a disease, reduces dependence and complications of the use of chemical synthetic preparations. SMT RCPT can be combined with any kind of specific treatment. Internet-variant of SMT RCPT has been developed. Chronomedicine is priority tendency in industrialized countries of the world--the USA, the Great Britain, Germany, France, Russia, China, Japan and appears on lead positions among alternative methods of treatment, both traditional, and non-traditional.

  7. Superconcentration and related topics

    CERN Document Server

    Chatterjee, Sourav

    2014-01-01

    A certain curious feature of random objects, introduced by the author as “super concentration,” and two related topics, “chaos” and “multiple valleys,” are highlighted in this book. Although super concentration has established itself as a recognized feature in a number of areas of probability theory in the last twenty years (under a variety of names), the author was the first to discover and explore its connections with chaos and multiple valleys. He achieves a substantial degree of simplification and clarity in the presentation of these findings by using the spectral approach. Understanding the fluctuations of random objects is one of the major goals of probability theory and a whole subfield of probability and analysis, called concentration of measure, is devoted to understanding these fluctuations. This subfield offers a range of tools for computing upper bounds on the orders of fluctuations of very complicated random variables. Usually, concentration of measure is useful when more direct prob...

  8. Sports related to drowning.

    Science.gov (United States)

    Szpilman, David; Orlowski, James P

    2016-09-01

    Aquatic sports are included in the top list of risky practices as the environment per se carries a possibility of death by drowning if not rescued in time. Not only are aquatic sports related to a high risk of death, but also all sports practiced on the water, over the water and on ice. Whatever the reason a person is in the water, drowning carries a higher possibility of death if the individual is unable to cope with the water situation, which may simply be caused by an inability to stay afloat and get out of the water or by an injury or disease that may lead to physical inability or unconsciousness. The competitive nature of sports is a common pathway that leads the sports person to exceed their ability to cope with the environment or simply misjudge their physical capability. Drowning involves some principles and medical interventions that are rarely found in other medical situations as it occurs in a deceptively hostile environment that may not seem dangerous. Therefore, it is essential that health professionals are aware of the complete sequence of action in drowning. This article focuses on the pulmonary injury in sports and recreational activities where drowning plays the major role. Copyright ©ERS 2016.

  9. Affine Sphere Relativity

    Science.gov (United States)

    Minguzzi, E.

    2017-03-01

    We investigate spacetimes whose light cones could be anisotropic. We prove the equivalence of the structures: (a) Lorentz-Finsler manifold for which the mean Cartan torsion vanishes, (b) Lorentz-Finsler manifold for which the indicatrix (observer space) at each point is a convex hyperbolic affine sphere centered on the zero section, and (c) pair given by a spacetime volume and a sharp convex cone distribution. The equivalence suggests to describe (affine sphere) spacetimes with this structure, so that no algebraic-metrical concept enters the definition. As a result, this work shows how the metric features of spacetime emerge from elementary concepts such as measure and order. Non-relativistic spacetimes are obtained replacing proper spheres with improper spheres, so the distinction does not call for group theoretical elements. In physical terms, in affine sphere spacetimes the light cone distribution and the spacetime measure determine the motion of massive and massless particles (hence the dispersion relation). Furthermore, it is shown that, more generally, for Lorentz-Finsler theories non-differentiable at the cone, the lightlike geodesics and the transport of the particle momentum over them are well defined, though the curve parametrization could be undefined. Causality theory is also well behaved. Several results for affine sphere spacetimes are presented. Some results in Finsler geometry, for instance in the characterization of Randers spaces, are also included.

  10. Scapular Dyskinesis: Related Pathology

    Directory of Open Access Journals (Sweden)

    Emilio López-Vidriero,

    2015-02-01

    Full Text Available Shoulder pain is one of the most frequent causes of disability in overhead sports and often forces athletes and workers to stop their activities. Scapular dyskinesis is not an injury or a musculoskeletal diagnosis, but rather an alteration of the normal position or motion of the scapula during coupled scapulohumeral movements. The underlying pathology can be multifactorial in nature, and understanding the various contributing factors is important in order to properly diagnose and treat the patient. An additional goal should be the prevention of further pathology or symptoms. In the present article the concept of scapular dyskinesis is reviewed along with a review of the literature regarding related pathology and our observations. Scapular dyskinesis can exist in asymptomatic individuals. In symptomatic patients with shoulder pain the scapular rhythm should be evaluated and treated. Some of the associated pathologies could be subacromial impingement, internal impingement, chronic acromioclavicular dislocations grade III, chronic neck pain. Physical therapy is usually the preferred treatment of choice and effective to treat these patients.

  11. Water Relations of Seagrasses

    Science.gov (United States)

    Tyerman, Stephen D.

    1982-01-01

    The stationary volumetric elastic modulus (εs) of the leaf cells of three seagrasses (Halophila ovalis (R.Br.) Hook, Zostera capricorni Aschers, and Posidonia australis Hook f.) was evaluated from estimates of εs plus intracellular osmotic pressure (εs + IIi) and IIi. The estimates of (εs + IIi) were made using a linear displacement transducer to measure very small changes in thickness of leaf tissue produced by changes in external osmotic pressure (IIo). εs increases with increasing turgor pressure in each of the species and the maximum values of εs are: 22 megapascals for H. ovalis, 17 megapascals for Z. capricorni, and 51 megapascals for P. australis. There is a hysteresis in thickness changes versus changes in IIo which indicates a hysteresis in the relationship between volume and turgor pressure. The hysteresis results in εs being different for swelling and for shrinking cells over the same range of IIo and this may be important in other aspects of plant-water relations. A new design of an apparatus employing a linear displacement transducer for measuring very small changes in tissue thickness is described. The new design has the advantages of virtually frictionless movement and a precision of 0.05 micrometer. PMID:16662326

  12. Shaping Relations: Exploiting Relational Features for Visuospatial Priming

    Science.gov (United States)

    Livins, Katherine A.; Doumas, Leonidas A. A.; Spivey, Michael J.

    2016-01-01

    Although relational reasoning has been described as a process at the heart of human cognition, the exact character of relational representations remains an open debate. Symbolic-connectionist models of relational cognition suggest that relations are structured representations, but that they are ultimately grounded in feature sets; thus, they…

  13. Is there a map between Galilean relativity and special relativity?

    OpenAIRE

    Shariati, Ahmad; Jafari, N.

    2014-01-01

    Mandanici has provided a map which he claims to be a two way map between Galilean relativity and special relativity. We argue that this map is simply a curvilinear coordinate system on a subset of the two-dimensional Minkowski space-time, and is not a two way map between 1+1 dimensional Galilean relativity and 1+1 dimensional special relativity.

  14. Fault-Related Sanctuaries

    Science.gov (United States)

    Piccardi, L.

    2001-12-01

    Beyond the study of historical surface faulting events, this work investigates the possibility, in specific cases, of identifying pre-historical events whose memory survives in myths and legends. The myths of many famous sacred places of the ancient world contain relevant telluric references: "sacred" earthquakes, openings to the Underworld and/or chthonic dragons. Given the strong correspondence with local geological evidence, these myths may be considered as describing natural phenomena. It has been possible in this way to shed light on the geologic origin of famous myths (Piccardi, 1999, 2000 and 2001). Interdisciplinary researches reveal that the origin of several ancient sanctuaries may be linked in particular to peculiar geological phenomena observed on local active faults (like ground shaking and coseismic surface ruptures, gas and flames emissions, strong underground rumours). In many of these sanctuaries the sacred area is laid directly above the active fault. In a few cases, faulting has affected also the archaeological relics, right through the main temple (e.g. Delphi, Cnidus, Hierapolis of Phrygia). As such, the arrangement of the cult site and content of relative myths suggest that specific points along the trace of active faults have been noticed in the past and worshiped as special `sacred' places, most likely interpreted as Hades' Doors. The mythological stratification of most of these sanctuaries dates back to prehistory, and points to a common derivation from the cult of the Mother Goddess (the Lady of the Doors), which was largely widespread since at least 25000 BC. The cult itself was later reconverted into various different divinities, while the `sacred doors' of the Great Goddess and/or the dragons (offspring of Mother Earth and generally regarded as Keepers of the Doors) persisted in more recent mythologies. Piccardi L., 1999: The "Footprints" of the Archangel: Evidence of Early-Medieval Surface Faulting at Monte Sant'Angelo (Gargano, Italy

  15. Sexually related trauma.

    Science.gov (United States)

    Geist, R F

    1988-08-01

    cases. Physicians must be educated and vigilant for sexually related injuries because people frequently will delay treatment and then provide misleading histories because of embarrassment.

  16. Marginalité, vulnérabilité et pratiques de survie en période de soudure alimentaire

    OpenAIRE

    Janin, Pierre

    2007-01-01

    18 pages; International audience; Cette communication s'intéresse aux relations existantes entre la marginalité et la vulnérabilité alimentaires dans des espaces ruraux africains soumis à de multiples aléas et contraintes. La « soudure alimentaire », analyseur complexe du manque objectif comme ressenti à l'échelle micro, en constitue le point d'entrée dynamique privilégié. Cette approche s'efforce plus particulièrement de prendre en compte la dimension temporelle, la variabilité spatiale et l...

  17. Bipolarity and the relational division

    OpenAIRE

    Tamani, Nouredine; Lietard, Ludovic; Rocacher, Daniel

    2011-01-01

    International audience; A fuzzy bipolar relation is a relation defined by a fuzzy bipolar condition, which could be interpreted as an association of a constraint and a wish. In this context, the extension of the relational division operation to bipolarity is studied in this paper. Firstly, we define a bipolar division when the involved relations are crisp. Then, we define, from the semantic point of view, several forms of bipolar division when the involved relations are defined by fuzzy bipol...

  18. Three levels of understanding physical relativity: Galileo's relativity, Up-to-date Galileo's relativity and Einstein's relativity: A historical survey

    OpenAIRE

    Rothenstein, Bernhard; Nafornita, Corina

    2004-01-01

    We present a way of teaching Einstein's special relativity. It starts with Galileo's relativity, the learners know from previous lectures. The lecture underlines that we can have three transformation equations for the space-time coordinates of the same event, which lead to absolute clock readings, time intervals and lengths (Galileo's relativity), to absolute clock readings but to relative time intervals and lengths (up-to-date Galileo transformations) and to relative clock readings time inte...

  19. The relation between herbivore density and relative resource ...

    African Journals Online (AJOL)

    The relation between the relative density of resources and herbivore density is illustrated by regressions of the ecological density of kudu (Tragelaphus strepsiceros) on the relative density of habitat patches within landscapes for a semi-arid savanna. Habitat suitability models were used to isolate patches of suitable kudu ...

  20. Alcoholic Relatives and Their Impact on Alcohol-Related Beliefs.

    Science.gov (United States)

    Johnson, Patrick B.; And Others

    Although research on children of alcoholics indicates that they are at high risk for later problem drinking, the etiological dynamics associated with this heightened risk status are not yet understood. This study compared the alcohol-related beliefs of subjects who possessed close relatives with alcohol problems with alcohol-related beliefs of…

  1. A Relational Algebra Query Language for Programming Relational Databases

    Science.gov (United States)

    McMaster, Kirby; Sambasivam, Samuel; Anderson, Nicole

    2011-01-01

    In this paper, we describe a Relational Algebra Query Language (RAQL) and Relational Algebra Query (RAQ) software product we have developed that allows database instructors to teach relational algebra through programming. Instead of defining query operations using mathematical notation (the approach commonly taken in database textbooks), students…

  2. Nuevas retóricas para viejas prácticas. Repensando la idea de diversidad y su uso en la comprensión y abordaje de la discapacidad Nuevas retóricas para viejas prácticas. Repensando la idea de diversidad y su uso en la comprensión y abordaje de la discapacidad

    Directory of Open Access Journals (Sweden)

    M.E. Almeida

    2010-03-01

    Full Text Available El presente ensayo recupera las reflexiones y producciones del equipo interdisciplinario de investigadores y docentes de la Facultad de Trabajo Social (FTS de la Universidad Nacional de Entre Ríos (UNER, Argentina1. Nos proponemos por un lado revisar críticamente la noción de diversidad y las prácticas que en ella se fundan y por otra abordar la perspectiva de la producción social de la discapacidad desde el paradigma de la complejidad. Intentaremos deconstruir el concepto de diversidad, no para cambiarlo simplemente por otro que nos incomode menos, sino para sumergirnos en la maraña de sentidos en que la diversidad se inscribe como descriptor de un cierto orden de cosas. Entendemos que la noción de diversidad, en tanto descriptiva de un cierto cúmulo de tipos posibles es muy útil en el campo de lo biológico, pero sin duda es necesario discutir algunas implicancias de su traslado lineal al campo de lo social. Finalmente, proponemos pensar y pasar de la perspectiva de atención a/en la diversidad al abordaje en la complejidad recuperando la idea de experiencias de complejidad, en referencia a experiencias que ya no se organizan y legitiman en torno al señalamiento e identificación de tal o cual complejo (como un otro específico y/o su complejidad, sino experiencias capaces de reconocerla como condición intrínseca a toda experiencia pedagógica, social, política, cultural.This essay recovers ideas and productions of the interdisciplinary team of researchers and professors from the Faculty of Social Work at the National University of Entre Rios, Argentine. We propose a critical review of the practices and the notion of diversity are based from, by means of using the perspective of the social production of disability and the paradigm of complexity. We try to deconstruct the concept of diversity, not just to change it for more comfortable ideas, but to dive into the confusion of meanings that diversity is as a descriptor of a certain order of things. The notion of diversity can be useful in the biological field while describing a host of possible types, but it is certainly necessary to be discussed in the implications of his translation to the social field. Finally, we propose to move from the perspective of attention to and in diversity to approach the complexity of experience recovering the idea of complexity, referring to experiences that are not organized and legitimized around the signage and identification of a particular complex (as a specific one and his complexity, but experience can recognize it as an intrinsic condition of every educational, social, political, cultural experience.

  3. The School Community Relations Triangle.

    Science.gov (United States)

    Mooney, Joseph P.

    1980-01-01

    A former superintendent and principal believes community relations is an extremely important responsibility of today's school administrators. A model is presented for a good community relations program. (Author/MLF)

  4. A Relational Theory of Working

    Science.gov (United States)

    Blustein, David L.

    2011-01-01

    Building on diverse influences from critical perspectives in vocational psychology and the relational movement in contemporary psychological discourse, this article introduces the relational theory of working. Attending to the full array of people who work and who want to work, the relational theory conceptualizes working as an inherently…

  5. Spatial geometry and special relativity

    DEFF Research Database (Denmark)

    Kneubil, Fabiana Botelho

    2016-01-01

    In this work, it is shown the interplay of relative and absolute entities, which are present in both spatial geometry and special relativity. In order to strengthen the understanding of special relativity, we discuss firstly an instance of geometry and the existence of both frame-dependent and fr...

  6. Relative Clauses in Classical Nahuatl

    Science.gov (United States)

    Langacker, Ronald W.

    1975-01-01

    Jane Rosenthal's paper on relative clauses in Classical Nahuatl is discussed, and it is argued that she misses an important generalization. An alternative analysis to a class of relative pronouns and new rules for the distribution of relative pronouns are proposed. (SC)

  7. Introducing Relativity into Quantum Chemistry

    Science.gov (United States)

    Li, Wai-Kee; Blinder, S. M.

    2011-01-01

    It is not often realized by chemists that the special theory of relativity is behind several aspects of quantum chemistry. The Schrdinger equation itself is based on relations between space-time and energy-momentum four vectors. Electron spin is, of course, the most obvious manifestation of relativity. The chemistry of some heavy elements is…

  8. Cooperation and competition between relatives

    NARCIS (Netherlands)

    West, S.A.; Pen, I.R.; Griffin, A.S.

    2002-01-01

    Individuals are predicted to. behave more altruistically and less competitively toward their relatives, because they share a relatively high proportion of their genes (e.g., one-half for siblings and one-eighth for cousins). Consequently, by helping a relative reproduce, an individual passes its

  9. The Relative Importance of Health

    Science.gov (United States)

    Hsieh, Chang-Ming

    2008-01-01

    This article seeks to extend Michalos' [Social indicators research and health-related quality of life (QoL) research. "Social Indicators Research," 65, 27-72, 2004] discussion on bridging social indicators research and health-related QoL (HRQoL) research through an examination of (1) the relative importance of satisfaction with one's own health to…

  10. Relative deprivation and intergroup prejudice

    NARCIS (Netherlands)

    Pettigrew, T.F.; Christ, O.; Wagner, U.; Meertens, R.W.; van Dick, R.; Zick, A.

    2008-01-01

    Using three diverse European surveys, we test the relationship between relative deprivation (RD) and anti-immigrant prejudice. We find that both group relative deprivation (GRD) and individual relative deprivation (IRD) are found primarily among working-class respondents who are politically

  11. On Controversies in Relativity Theory

    OpenAIRE

    Vankov, Anatoli Andrei

    2006-01-01

    Controversies arise when specialists disagree on some particular issue. This normally occurs in any scientific brunch. We analyze some controversies, which have a good cause in Special Relativity. The paper does not question Special Relativity Theory but it challenges changing deeply held academic beliefs about imaginary experiments in Special Relativity Theory. PACS 03.30.+p

  12. Organization, relational justice and absenteeism.

    Science.gov (United States)

    Stoetzer, Ulrich; Åborg, Carl; Johansson, Gun; Svartengren, Magnus

    2014-01-01

    There is a need for more knowledge on how to manage companies towards healthier and more prosperous organizations with low levels of absenteeism. Relational Justice can be a useful concept when managing such organizations. Organizational factors can help to explain why some companies have relatively low absenteeism rates, even though they are equal to other companies in many other aspects. Previous studies suggest that management may be one important factor. Efficient management may depend on good relations between the leaders and the employees. The concept of Relational Justice is designed to capture these relations. Consequently, a Relational Justice framework may be used to understand why some companies have a low incidence of absenteeism. Managers from a representative body of Swedish companies. Interviews were analyzed to explore whether the items representing the concept of Relational Justice can be used to further understand the strategies, procedures and structures that characterize organizations and management in companies with a low incidence of absenteeism. Strategies, procedures or principles related to Relational Justice were common and highlighted in companies with an incidence of absenteeism. The most frequently occurring factors were; to be treated with kindness and consideration, personal viewpoint considered and to be treated impartially. The results suggested that a Relational Justice framework could be used to increase understanding of the organizational and managerial factors typical for companies with a low incidence of absenteeism. A Relational Justice approach to organizational management may be used to successfully lower absenteeism, change organizations and promote healthy and prosperous companies.

  13. Hierarchical classification as relational framing.

    Science.gov (United States)

    Slattery, Brian; Stewart, Ian

    2014-01-01

    The purpose of this study was to model hierarchical classification as contextually controlled, generalized relational responding or relational framing. In Experiment 1, a training procedure involving nonarbitrarily related multidimensional stimuli was used to establish two arbitrary shapes as contextual cues for 'member of' and 'includes' relational responding, respectively. Subsequently those cues were used to establish a network of arbitrary stimuli in particular hierarchical relations with each other, and then test for derivation of further untrained hierarchical relations as well as for transformation of functions. Resultant patterns of relational framing showed properties of transitive class containment, asymmetrical class containment, and unilateral property induction, consistent with conceptions of hierarchical classification as described within the cognitive developmental literature. Experiment 2 extended the basic model by using "fuzzy category" stimuli and providing a better controlled test of transformation of functions. Limitations and future research directions are discussed. © Society for the Experimental Analysis of Behavior.

  14. Shaping relations: Exploiting relational features for visuospatial priming.

    Science.gov (United States)

    Livins, Katherine A; Doumas, Leonidas A A; Spivey, Michael J

    2016-01-01

    Although relational reasoning has been described as a process at the heart of human cognition, the exact character of relational representations remains an open debate. Symbolic-connectionist models of relational cognition suggest that relations are structured representations, but that they are ultimately grounded in feature sets; thus, they predict that activating those features can affect the trajectory of the relational reasoning process. The present work points out that such models do not necessarily specify what those features are though, and endeavors to show that spatial information is likely a part of it. To this end, it presents 2 experiments that used visuospatial priming to affect the course of relational reasoning. The first is a relational category-learning experiment in which this type of priming was shown to affect which spatial relation was learned when multiple were possible. The second used crossmapping analogy problems, paired with this same type of priming, to show that visuospatial cues can make participants more likely to map analogs based on relational roles, even with short presentation times. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  15. How public relations works: theoretical roots and public relations perspectives

    NARCIS (Netherlands)

    Ihlen, Ø.; van Ruler, B.

    2007-01-01

    Public relations is often studied from a managerial, instrumental perspective or a psychological, behavioral perspective. To understand the role of public relations in building trust or mistrust and to develop - or destroy - a license to operate, it needs also to be studied as a social phenomenon.

  16. Relative expression of genes related with cold tolerance in ...

    African Journals Online (AJOL)

    For analysis, the Spanish cultivar, Susan, was used as check tolerance and Oryzica 1 as susceptible check. Oxidative stress was measured through lipid peroxidation. To find mechanisms of cold tolerance in Chilean cultivars, we determined the relative expression of genes related with oxidative stress, such as superoxide ...

  17. Relation between moisture content of fine fuels and relative humidity.

    Science.gov (United States)

    Harold K. Steen

    1963-01-01

    Measurements indicate a relation between diurnal curves of relative humidity and moisture content of some important fuels of Oregon and Washington. Some of these measurements were made in early years of forest fire research in this region. The data in this note were collected at intervals throughout 4 days (in September 1938) at the Wind River Experimental Forest near...

  18. Group Relations at Work. Solidarity, Conflict, and Relations with Management.

    Science.gov (United States)

    Hodson, Randy

    1997-01-01

    Coded data from 83 work ethnographies and a telephone survey of 371 workers found that coworker solidarity generates high job satisfaction and better relations with management. Effects of the quality of coworker relationships equaled or exceeded the effects of job characteristics on satisfaction or management relations. (SK)

  19. The relation between herbivore density and relative resource ...

    African Journals Online (AJOL)

    Ecological theory can help range scientists to understand the determinants of ecological animal density or, in range management terms, 'carrying capacity'. The relation between the relative density of resources and herbivore density is illustrated by regressions of the ecological density of kudu (Tragelaphus strepsiceros) on ...

  20. Special Relativity in Week One: 1) The Principle of Relativity

    Science.gov (United States)

    Huggins, Elisha

    2011-01-01

    We like to begin an introductory physics course with a law of physics that applies to everything, has no known exceptions, and whose consequences are already familiar to students. That law is the principle of relativity. By focusing on the principle of relativity itself, and a careful selection of the thought experiments, we can comfortably…

  1. Relational Aggression and Peer Relations: Gender and Developmental Issues.

    Science.gov (United States)

    Rys, Gail S.; Bear, George G.

    1997-01-01

    Examined the relationship between three behaviors (physical aggression, relational aggression, and prosocial behaviors) and three social outcomes (peer rejection, acceptance, and reciprocal friendships) in 131 third-graders and 135 sixth-graders. Found that among girls, but not boys, relational aggression explained variance in rejection beyond…

  2. Rhetorical relations for information retrieval

    DEFF Research Database (Denmark)

    Lioma, Christina; Larsen, Birger; Lu, Wei

    2012-01-01

    -called discourse structure has been applied successfully to several natural language processing tasks. This work studies the use of rhetorical relations for Information Retrieval (IR): Is there a correlation between certain rhetorical relations and retrieval performance? Can knowledge about a document’s rhetorical......Typically, every part in most coherent text has some plausible reason for its presence, some function that it performs to the overall semantics of the text. Rhetorical relations, e.g. contrast, cause, explanation, describe how the parts of a text are linked to each other. Knowledge about this so...... relations be useful to IR? We present a language model modification that considers rhetorical relations when estimating the relevance of a document to a query. Empirical evaluation of different versions of our model on TREC settings shows that certain rhetorical relations can benefit retrieval effectiveness...

  3. Classification of Health Related Applications.

    Science.gov (United States)

    Höhn, Matthias; von Jan, Ute; Framke, Theodor; Albrecht, Urs-Vito

    2016-01-01

    Although there is a large number of health related apps available in the stores of the major mobile platforms, the stores do not really offer clear definitions of what health related apps are and how they can be categorized. A similar picture is found in literature. Here, many proposals covering different app related aspects have been published, but often, these only cover a narrow field. There is no common terminology describing what health apps are and neither is there a common classification. In order to alleviate the situation, we developed a proposal for categorization that can be used as a basis for discussing aspects related to health applications and for describing the unclear situation on the market. In this paper, the function related aspects are covered, although the scheme itself covers many other aspects related to users of health apps, technical aspects and so on. This initial classification was applied to a sample of health apps available for iOS and Android.

  4. General relativity basics and beyond

    CERN Document Server

    Date, Ghanashyam

    2015-01-01

    A Broad Perspective on the Theory of General Relativity and Its Observable Implications General Relativity: Basics and Beyond familiarizes students and beginning researchers with the basic features of the theory of general relativity as well as some of its more advanced aspects. Employing the pedagogical style of a textbook, it includes essential ideas and just enough background material needed for readers to appreciate the issues and current research. Basics The first five chapters form the core of an introductory course on general relativity. The author traces Einstein’s arguments and presents examples of space-times corresponding to different types of gravitational fields. He discusses the adaptation of dynamics in a Riemannian geometry framework, the Einstein equation and its elementary properties, and different phenomena predicted or influenced by general relativity. Beyond Moving on to more sophisticated features of general relativity, the book presents the physical requirements of a well-defined de...

  5. The Impact of Political Relations Between Countries on Economic Relations

    Directory of Open Access Journals (Sweden)

    Hossein Askari

    2012-09-01

    Full Text Available In this paper, we assess the implications of changes in bilateral diplomatic relations with the United States for economic relations. We identify countries whose relations with the US changed during two historic and significant milestones in the past three decades, and a third group of countries after their leftist governments failed/collapsed in early 1990s. Using the Mann-Whitney U-test, we measure the significance of changes in economic relations. We chose the following set of economic indices to reflect economic relations: imports and exports to and from the US, capital outflows from the US to the country, economic and military assistance provided by the US, flow of students to the US, US arms export to the country, the country’s military expenditures, and believing in the importance of remittances and FDI and portfolio investment we use total figures as we did not have bilateral figures. Our results, though mixed, offer some interesting insights.

  6. Special relativity, electrodynamics, and general relativity from Newton to Einstein

    CERN Document Server

    Kogut, John B

    2018-01-01

    Special Relativity, Electrodynamics and General Relativity: From Newton to Einstein, Second Edition, is intended to teach (astro)physics, astronomy, and cosmology students how to think about special and general relativity in a fundamental, but accessible, way. Designed to render any reader a "master of relativity," everything on the subject is comprehensible and derivable from first principles. The book emphasizes problem solving, contains abundant problem sets, and is conveniently organized to meet the needs of both student and instructor. Fully revised, updated and expanded second edition Includes new chapters on magnetism as a consequence of relativity and electromagnetism Contains many improved and more engaging figures Uses less algebra resulting in more efficient derivations Enlarged discussion of dynamics and the relativistic version of Newton's second law

  7. Relational goods, sociability, and happiness

    OpenAIRE

    Becchetti, L.; Pelloni, A.; F. Rossetti

    2008-01-01

    The role of sociability and relational goods has generally been neglected in the formulation of standard economics textbook preferences. Our findings show that relational goods have significant and positive effects on self declared life satisfaction, net of the impact of other concurring factors. We also document that such effects persist when the equally significant inverse causality nexus is taken into account. This implies that a more intense relational life enhances life satisfaction and,...

  8. Basic Relativity An Introductory Essay

    CERN Document Server

    Hraskó, Péter

    2011-01-01

    This Brief presents a new way of introducing relativity theory, in which perplexing relativistic effects such as time dilation and Lorentz contraction are explained prior to the discussion of Lorentz-transformation. The notion of relativistic mass is shown to contradict the spirit of relativity theory and the true significance of the mass-energy relation is contrasted with the popular view of it. The author discusses the twin paradox from the point of view of both siblings. Last but not least, the fundamentals of general relativity are described, including the recent Gravity Probe B experiment.

  9. China-Latin America Relations

    DEFF Research Database (Denmark)

    Christensen, Steen Fryba; Silva Ramos Becard, Danielly

    2016-01-01

    The article discusses the research field of China-Latin American relations and suggests a broad and encompassing approach to the topic. It discusses the main themes and problem areas that analysts mostly emphasize in analyses of China-Latin America relations.......The article discusses the research field of China-Latin American relations and suggests a broad and encompassing approach to the topic. It discusses the main themes and problem areas that analysts mostly emphasize in analyses of China-Latin America relations....

  10. Soft Congruence Relations over Rings

    Directory of Open Access Journals (Sweden)

    Xiaolong Xin

    2014-01-01

    Full Text Available Molodtsov introduced the concept of soft sets, which can be seen as a new mathematical tool for dealing with uncertainty. In this paper, we initiate the study of soft congruence relations by using the soft set theory. The notions of soft quotient rings, generalized soft ideals and generalized soft quotient rings, are introduced, and several related properties are investigated. Also, we obtain a one-to-one correspondence between soft congruence relations and idealistic soft rings and a one-to-one correspondence between soft congruence relations and soft ideals. In particular, the first, second, and third soft isomorphism theorems are established, respectively.

  11. SUMS Counts-Related Projects

    Data.gov (United States)

    Social Security Administration — Staging Instance for all SUMs Counts related projects including: Redeterminations/Limited Issue, Continuing Disability Resolution, CDR Performance Measures, Initial...

  12. Basic relativity. An introductory essay

    Energy Technology Data Exchange (ETDEWEB)

    Hrasko, Peter [Pecs Univ. (Hungary)

    2011-07-01

    This Brief presents a new way of introducing relativity theory, in which perplexing relativistic effects such as time dilation and Lorentz contraction are explained prior to the discussion of Lorentz-transformation. The notion of relativistic mass is shown to contradict the spirit of relativity theory and the true significance of the mass-energy relation is contrasted with the popular view of it. The author discusses the twin paradox from the point of view of both siblings. Last but not least, the fundamentals of general relativity are described, including the recent Gravity Probe B experiment. (orig.)

  13. Containment Relations in Anatomical Ontologies

    OpenAIRE

    Donnelly, Maureen

    2005-01-01

    In addition to parthood relations, containment relations are needed for describing the locations of anatomical individuals. My lungs are contained, but not part of, in my thoracic cavity. Urine is contained in, but not part of, the cavity of my urinary bladder.

  14. Training Guidelines for Employee Relations.

    Science.gov (United States)

    Hotel and Catering Training Board, Wembley (England).

    This set of guidelines is intended for use by employers desiring to establish the training needs of those involved in employee relations. The 16 guidelines cover the following principal activities normally associated with employee relations: staff management policy and aims, staff recruitment and selection, terms and conditions of employment,…

  15. Stakeholder relations and financial performance

    NARCIS (Netherlands)

    Scholtens, B.; Zhou, Y.

    2008-01-01

    We analyze how shareholder performance can be associated with stakeholder relations. As such, we try to find out whether there is an association between financial performance and stakeholder relations with respect to different theoretical notions about the firm. Financial performance is

  16. Perempuan Dalam Dunia Public Relations

    Directory of Open Access Journals (Sweden)

    Novi Kurnia

    2004-03-01

    Full Text Available Literature review shows that women gain more access to job in public relations. Observation in Yogyakarta shows that women are not easily top position in corporation due to understatement of the role of public relations in organizational structure. Discrimination against women is minimal except on family allowance.

  17. Finding related functional neuroimaging volumes

    DEFF Research Database (Denmark)

    Nielsen, Finn Årup; Hansen, Lars Kai

    2004-01-01

    We describe a content-based image retrieval technique for finding related functional neuroimaging experiments by voxelization of sets of stereotactic coordinates in Talairach space, comparing the volumes and reporting related volumes in a sorted list. Voxelization is accomplished by convolving ea...

  18. Future University-Industry Relations.

    Science.gov (United States)

    Sorrows, Howard E.

    1983-01-01

    University and industry relations in the United States, it is suggested, must promote competitive U.S. industries. The prime motive for increasing university-industrial relations is competitive commercial products and services. Other countries' success results from national technology ventures based on superior marketing and marshalling of…

  19. Emotional Intelligence and Interpersonal Relations.

    Science.gov (United States)

    Schutte, Nicola S.; Malouff, John M.; Bobik, Chad; Coston, Tracie D.; Greeson, Cyndy; Jedlicka, Christina; Rhodes, Emily; Wendorf, Greta

    2001-01-01

    Presents the results of seven studies that focused on the link between emotional intelligence and interpersonal relations. Tests emotional intelligence with empathy and self-monitoring, social skills, cooperation, relations with others, and marital satisfaction. Explores preference for emotionally intelligent partners in the final study. Includes…

  20. Public Relations: A Professional Responsibility

    Science.gov (United States)

    Fox, Carol Lynne

    1971-01-01

    A public relations program for guidance services must be honest, continuous, positive, comprehensive, sensitive to the public's concern, and presented in nontechnical terms. A counselor has professional responsibility to convey his competencies and character of guidance services to the public through a public relations role. The school counselor…

  1. Relative motion of orbiting bodies

    Science.gov (United States)

    Butikov, Eugene I.

    2001-01-01

    A problem of relative motion of orbiting bodies is investigated on the example of the free motion of any body ejected from the orbital station that stays in a circular orbit around the earth. An elementary approach is illustrated by a simulation computer program and supported by a mathematical treatment based on approximate differential equations of the relative orbital motion.

  2. Challenges for Relational Reinforcement Learning

    NARCIS (Netherlands)

    van Otterlo, M.; Kersting, Kristian; Tadepalli, P.; Givan, R; Driessens, K.

    2004-01-01

    We present a perspective and challenges for Relational Reinforcement Learning (RRL). We first survey existing work and distinguish a number of main directions. We then highlight some research problems that are intrinsically involved in abstracting over relational Markov Decision Processes. These are

  3. Industrial relations in Europe 2008

    NARCIS (Netherlands)

    Visser, J.

    2009-01-01

    This report - the fifth edition in a well-established series - aims to increase the visibility of European social dialogue, describe and raise awareness of developments in European industrial relations, and initiate related discussion through its analytical chapters. The 2008 report addresses the

  4. Pathfinder: XQuery - The Relational Way

    NARCIS (Netherlands)

    Boncz, Peter; Grust, Torsten; van Keulen, Maurice; Manegold, Stefan; Rittinger, Jan; Teubner, Jens; Boehm, K.; Jensen, C.S.; Haas, L.M.; Kersten, M.L.; Larson, P-K.; Ooi, B.C.

    Relational query processors are probably the best understood (as well as the best engineered) query engines available today. Although carefully tuned to process instances of the relational model (tables of tuples), these processors can also provide a foundation for the evaluation of "alien"

  5. New technologies in public relations

    Directory of Open Access Journals (Sweden)

    Dariusz Tworzydło

    2013-12-01

    Full Text Available The article includes an analysis and presentation of selected examples of communication tools, which are used in companies to create and maintain relationships with internal and external environment. The problems related with definition of public relations were also discussed. The article presents the advantage and negative consequences of the use of modern tools of PR, as well.

  6. Generalizations of Heisenberg uncertainty relation

    Energy Technology Data Exchange (ETDEWEB)

    Trifonov, D.A. [Institute for Nuclear Research, Sofia (Bulgaria)

    2002-09-01

    A survey on the generalizations of Heisenberg uncertainty relation and a general scheme for their entangled extensions to several states and observables is presented. The scheme is illustrated on the examples of one and two states and canonical quantum observables, and spin and quasi-spin components. Several new uncertainty relations are displayed. (author)

  7. New relations in basic dosimetry

    Energy Technology Data Exchange (ETDEWEB)

    Rebigan, F. [Institute of Atomic Physics, Bucharest (Romania)

    1995-12-01

    Four new relations have been derived based on the definitions of the fundamental dosimetric quantities given in recent ICRU reports. These relations have the general form A.B=A.B, where A and B are respectively the dosimetric quantities and their rates.

  8. Simulation in International Relations Education.

    Science.gov (United States)

    Starkey, Brigid A.; Blake, Elizabeth L.

    2001-01-01

    Discusses the educational implications of simulations in international relations. Highlights include the development of international relations simulations; the role of technology; the International Communication and Negotiation Simulations (ICONS) project at the University of Maryland; evolving information technology; and simulating real-world…

  9. Teaching Special Relativity without Calculus

    Science.gov (United States)

    Ruby, Lawrence

    2009-01-01

    In 2007 many AAPT members received a booklet that is the first chapter of a physics textbook available on a CD. This book espouses the new educational philosophy of teaching special relativity as the first item in the topic of mechanics. Traditionally, special relativity is part of one or more modern physics chapters at the end of the text, and…

  10. Cystic fibrosis-related diabetes

    DEFF Research Database (Denmark)

    Andersen, Henrik Ullits; Lanng, Susanne; Pressler, Tania

    2006-01-01

    OBJECTIVE: Cystic fibrosis (CF)-related diabetes has been regarded as a mild form of diabetes with a low risk of severe diabetes complications. The prevalence of CF-related diabetes increases with age, resulting in a 50% prevalence of diabetes at age 30 years. We sought to investigate whether...... microvascular complications in CF-related diabetes appear with a relevant frequency. RESEARCH DESIGN AND METHODS: Thirty-eight patients aged 30 (range 18-55) years with CF-related diabetes for 20 (0-31) years were screened for diabetes complications. Because of chronic pulmonary infections, the majority...... of diabetic retinopathy was found in patients with insulin-treated CF-related diabetes, stressing the need for a regular screening program as in type 1 diabetes. Severely impaired kidney function was common in lung transplant patients, probably secondary to cyclosporine treatment....

  11. Employment relations, flexibility and risk

    DEFF Research Database (Denmark)

    Jensen, Carsten Strøby

    Employment relations literature often distinguishes between social democratic/corporatist models of employment relations and liberal models of employment relations as they are seen as opposite or at least different ways of organizing labor markets. They are often characterized as having very...... different risk profiles in terms of relationships between employees, employers, and the state. Low levels of labor market regulation very often characterize the liberal models of employment relations as we know them from, for instance, the USA and the UK. This means that employment conditions are very often...... insecure and that the burden of unemployment risk mostly lies with the employees rather than the employer. Corporatist – or social democratic – employment relations models are, in contrast to the liberal models, often characterized by stricter regulation of the labor market and by high standards...

  12. Entropic error-disturbance relations

    Science.gov (United States)

    Coles, Patrick; Furrer, Fabian

    2014-03-01

    We derive an entropic error-disturbance relation for a sequential measurement scenario as originally considered by Heisenberg, and we discuss how our relation could be tested using existing experimental setups. Our relation is valid for discrete observables, such as spin, as well as continuous observables, such as position and momentum. The novel aspect of our relation compared to earlier versions is its clear operational interpretation and the quantification of error and disturbance using entropic quantities. This directly relates the measurement uncertainty, a fundamental property of quantum mechanics, to information theoretical limitations and offers potential applications in for instance quantum cryptography. PC is funded by National Research Foundation Singapore and Ministry of Education Tier 3 Grant ``Random numbers from quantum processes'' (MOE2012-T3-1-009). FF is funded by Japan Society for the Promotion of Science, KAKENHI grant No. 24-02793.

  13. IS-related Organizational Change

    DEFF Research Database (Denmark)

    Reinwald, Anja

    The link between information systems (IS) and organizational change has been well established in the IS literature. This dissertation introduces the Complex Responsive Processes perspective as a novel approach to the study of IS-related organizational change. By combining insights from complexity...... this novel approach to the study of IS-related organizational change, the dissertation identifies the role of conflict as a potential driver of IS-related organizational change as well as the need for ongoing initiatives to ensure the needed local changes. Further, power is emphasized as a relational...... science with insights from social science, attention is directed to differences, and the related conflict and power balance as the basis of change. An interpretive case study was conducted of a process towards realizing the digital school unfolding within a Danish municipality. Through observations...

  14. The Principle of Relativity and the Indeterminacy of Special Relativity

    Science.gov (United States)

    de Abreu, Rodrigo; Guerra, Vasco

    2008-01-01

    This work ends a trilogy devoted to a journey into the foundations of special relativity. The first paper debated the meaning of the constancy of the two-way speed of light and its close relation to the conceptualization of time. The second one addressed the question of the possible constancy of the one-way speed of light and the trivial--but,…

  15. Variations of relative humidity in relation to meningitis in Africa

    Science.gov (United States)

    Seefeldt, M. W.; Hopson, T. M.

    2011-12-01

    The meningitis belt is a region covering Sub-Saharan Africa from the Sahel of West Africa eastward to western Ethiopia. The region is prone to meningitis epidemics during the dry season extending from approximately January to May, depending on the region. Relative humidity has been found to be a critical environmental factor indicating the susceptibility of a region to meningitis epidemics. This study evaluates the variation of relative humidity across West Africa over 30 dry-seasons (1979 - 2009) using the NASA-MERRA dataset. The method of self-organizing maps is employed to characterize the changes in relative humidity patterns across the region within a given dry season as well as changes over the 30 years. A general pattern of changes in relative humidity is indicated as the rainbelt retreats to the south at the onset of the dry season and then returns to the region at the end of the dry season. Within each dry season there is a unique pattern. The climatological conditions of relative humidity at the onset of the dry season provide an indication of the moisture environment for the entire dry season. Year to year variation in the relative humidity patterns are found to be gradual. Future applications involve using the results from the SOM evaluation to be used for future decisions involving prevention of meningitis epidemics.

  16. Leishmaniose tegumentar americana e suas relações sócio ambientais no município de Ubatuba-SP La leishmaniose tégumentaire américaine et ses relations avec le socio-environnement à Ubatuba-SP American cutaneous leishmaniasis and its relations with the social environment in Ubatuba-SP

    Directory of Open Access Journals (Sweden)

    Helen da Costa Gurgel

    2011-12-01

    de cas se produit dans la région nord du Brésil, mais est encore très présente sur le Littoral nord de l'État de São Paulo, une région de forte attraction touristique. Afin de comprendre l'influence des changements socio-environnementaux dans la dynamique de la maladie, nous avons analysé la distribution spatio-temporelle des cas déclarés entre 1998 et 2006 à Ubatuba dans l’Etat de São Paulo. Le type d’utilisation des terres et la variabilité du climat, considérés comme importants pour le développement et la prolifération de l'insecte vecteur, ont aussi été analysés. Les données ont été traitées grâce aux outils et techniques de SIG et de télédétection. L'intérêt pour cette recherche est apparu en raison de l'augmentation du nombre de cas signalés à partir de 2003, année durant laquelle on a enregistré une concentration des précipitations sur les premiers mois de l’année. Le climat chaud et humide de la région contribue à la prolifération des moustiques qui transmettent la maladie. L'analyse a montré la prévalence survenue chez les individus économiquement actifs et les hommes. Il existe également une relation significative entre le type d'utilisation des terres et la localisation de la maladie, ainsi que la proximité des habitats en forêt. Le facteur social semble également important, il fait référence au coût de l’immobilier qui est généralement moins élevé dans les périphéries urbaines situées à proximités des espaces boisés, secteurs où prolifèrent les insectes vecteurs. Le déplacement de la maladie semble également être influencé par les facteurs économiques et démographiques puisque  l'implantation des logements est souvent motivée par la situation financière du futur résident.The American Cutaneous Leishmaniasis (ACL is a vetorial disease that can be acquired when anyone is bitten by an infected mosquito. The majority of the cases occur in Northern parts of Brazil, although in the

  17. Relational psychoanalysis: a historical background.

    Science.gov (United States)

    Berman, E

    1997-01-01

    The author hopes Relational Psychoanalysis, as a broad emphasis on Self and Other, will not develop into another constraining and dogmatic school. In studying its sources I wish to maintain a dialectical view, and avoid ancestor worship. For me, its roots can be found both in the inner contradictions of theorists, such as Freud and Klein, and in the intense and generative dyads they created, particularly Freud-Ferenczi and Klein-Winnicott, where the defiance of the older colleague's authority led the younger one toward better understanding of relational dynamics. While both Fairbairn and Sullivan failed to draw full clinical conclusions from their innovative theoretical models, their work-as well as the contributions of Balint, Guntrip, Racker, Kohut and others, and the growing dissatisfaction with the traditional drive-defense model-helped Greenberg and Mitchell formulate in the 1980s their new relational integration. These ideas are most fully expressed in the Relational Track of NYU's postdoctoral psychoanalytic program, and in the journal Psychoanalytic Dialogues. Among major issues debated by relational theorists are motivation (wish/need/drive), knowledge and truth in relationships (social constructivism), relational developmental models, the nature of intersubjectivity, the significance of feminism and postmodernism for psychoanalysis, and the implications of a relational approach for technique and for training.

  18. A primer of special relativity

    CERN Document Server

    Sardesai, PL

    2004-01-01

    A Primer of Special Relativity1 is an unusually lucid introduction to the subject specifically written for Indian students. It is intended to give the beginner a firm grounding for a more advanced course in relativity. An entire chapter is devoted to applications of the theory to elucidate a large number of topics the students (B.Sc. Physics) come across in Modern Physics. Detailed and well-selected examples are used to illuminate aspects of the theory as well as to show techniques of application. A large number of Illustrative Examples enables the students to gain confidence to solve any problem in relativity normally expected of B.Sc. students.

  19. Relativity a very short introduction

    CERN Document Server

    Stannard, F Russell

    2008-01-01

    Relativity: A Very Short Introduction makes the theory of relativity understandable and accessible. 100 years ago, Einstein's theory of relativity shattered the world of physics. Our comforting Newtonian ideas of space and time were replaced by bizarre and counterintuitive conclusions: if you move at high speed, time slows down, space squashes up and you get heavier; travel fast enough and you could weigh as much as a jumbo jet, be squashed thinner than a CD without feeling a thing - and live forever. And that was just the special theory. With the general theory came even stranger ideas of curved space-time, which changed our understanding of gravity and the cosmos.

  20. Special relativity a first encounter

    CERN Document Server

    Giulini, Domenico

    2005-01-01

    Special relativity provides the foundations of our knowledge of space and time. Without it, our understanding of the world, and its place in the universe, would be unthinkable. This book gives a concise, elementary, yet exceptionally modern, introduction to special relativity. It is a gentle yet serious 'first encounter', in that it conveys a true understanding rather than purely reports the basic facts. Only very elementary mathematical knowledge is needed to master it (basichigh-school maths), yet it will leave the reader with a sound understanding of the subject. Special Relativity: A First

  1. Multilevel security for relational databases

    CERN Document Server

    Faragallah, Osama S; El-Samie, Fathi E Abd

    2014-01-01

    Concepts of Database Security Database Concepts Relational Database Security Concepts Access Control in Relational Databases      Discretionary Access Control      Mandatory Access Control      Role-Based Access Control Work Objectives Book Organization Basic Concept of Multilevel Database Security IntroductionMultilevel Database Relations Polyinstantiation      Invisible Polyinstantiation      Visible Polyinstantiation      Types of Polyinstantiation      Architectural Consideration

  2. Relational Multimodal Freight Database Webinar

    Science.gov (United States)

    2012-02-01

    The relational Multimodal Freight Database (MFD) was developed as part of Texas Department : of Transportation (TxDOT) Research Project 0-6297 entitled Freight Planning Factors Impacting : Texas Commodity Flows, conducted by the Center for Transporta...

  3. Special relativity from soft gravitons

    Science.gov (United States)

    Hertzberg, Mark P.; Sandora, McCullen

    2017-10-01

    We study all translationally and rotationally invariant local theories involving massless spin 2 and spin 1 particles that mediate long range forces, allowing for general energy relations and violation of boost invariance. Although gauge invariance is not a priori required to describe non-Lorentz invariant theories, we first establish that locality requires soft gauge invariance. Then by taking the soft graviton limit in scattering amplitudes, we prove that in addition to the usual requirement of universal graviton couplings, the special relativistic energy-momentum relation is also required and must be exact. We contrast this to the case of theories with only spin ≤1 particles, where, although we can still derive charge conservation from locality, special relativity can be easily violated. We provide indications that the entire structure of relativity can be built up from spin 2 in this fashion.

  4. Fluctuation relations for anisotropic systems

    Science.gov (United States)

    Villavicencio-Sanchez, R.; Harris, R. J.; Touchette, H.

    2014-02-01

    Currents of particles or energy in driven non-equilibrium steady states are known to satisfy certain symmetries, referred to as fluctuation relations, determining the ratio of the probabilities of positive fluctuations to negative ones. A generalization of these fluctuation relations has been proposed recently for extended non-equilibrium systems of dimension greater than one, assuming, crucially, that they are isotropic (Hurtado P. I., Pérez-Espigares C., del Pozo J. J. and Garrido P. L., Proc. Natl. Acad. Sci. U.S.A., 108 (2011) 7704). Here we relax this assumption and derive a fluctuation relation for d-dimensional systems having anisotropic bulk driving rates. We test the validity of this anisotropic fluctuation relation by calculating the particle current fluctuations in the 2d anisotropic zero-range process, using both exact and fluctuating hydrodynamic approaches.

  5. Uncertainty relation for mutual information

    Science.gov (United States)

    Schneeloch, James; Broadbent, Curtis J.; Howell, John C.

    2014-12-01

    We postulate the existence of a universal uncertainty relation between the quantum and classical mutual informations between pairs of quantum systems. Specifically, we propose that the sum of the classical mutual information, determined by two mutually unbiased pairs of observables, never exceeds the quantum mutual information. We call this the complementary-quantum correlation (CQC) relation and prove its validity for pure states, for states with one maximally mixed subsystem, and for all states when one measurement is minimally disturbing. We provide results of a Monte Carlo simulation suggesting that the CQC relation is generally valid. Importantly, we also show that the CQC relation represents an improvement to an entropic uncertainty principle in the presence of a quantum memory, and that it can be used to verify an achievable secret key rate in the quantum one-time pad cryptographic protocol.

  6. Flavorings-Related Lung Disease

    Science.gov (United States)

    ... on the NIOSH Science Blog and share your comments. Related Topics Protective Clothing and Ensembles Follow NIOSH Facebook Flickr Pinterest Twitter YouTube NIOSH Homepage NIOSH A-Z Workplace Safety & Health ...

  7. Grammatical Constructions as Relational Categories.

    Science.gov (United States)

    Goldwater, Micah B

    2017-07-01

    This paper argues that grammatical constructions, specifically argument structure constructions that determine the "who did what to whom" part of sentence meaning and how this meaning is expressed syntactically, can be considered a kind of relational category. That is, grammatical constructions are represented as the abstraction of the syntactic and semantic relations of the exemplar utterances that are expressed in that construction, and it enables the generation of novel exemplars. To support this argument, I review evidence that there are parallel behavioral patterns between how children learn relational categories generally and how they learn grammatical constructions specifically. Then, I discuss computational simulations of how grammatical constructions are abstracted from exemplar sentences using a domain-general relational cognitive architecture. Last, I review evidence from adult language processing that shows parallel behavioral patterns with expert behavior from other cognitive domains. After reviewing the evidence, I consider how to integrate this account with other theories of language development. Copyright © 2017 Cognitive Science Society, Inc.

  8. Some Pitfalls in Special Relativity

    Science.gov (United States)

    Chai, An-Ti

    1973-01-01

    The problem of observing a collision between two spaceships is utilized to illustrate the misuse of time dilation and length contraction, and the incorrect description of space-time coordinates in special relativity. (Author/DF)

  9. LABOUR RELATIONS IN POSTINDUSTRIAL ECONOMY

    Directory of Open Access Journals (Sweden)

    Yuriy Rostislavovitch Chistyakov

    2013-09-01

    Full Text Available The article deals with inadequacy of present-day labour relations in economy. Out of date form of labour relations makes workforce dependable, causes social inequality, prevents economical development. The article gives results of theoretical and empiric research. The mechanism of guaranteed reproduction of labour to be realized as social partnership is offered.Purpose: the purpose is to give critical estimation of present-day labour relations in postindustrial economy.Method of studies: monographic, general theoretic economic analysis, correlation statistic analysisResults: a new modern adequate alternative form of labour relations guarantying the reproduction of labour is introducedField of application: industrial regulation both in economics in general and concrete businesses; motivation of workers.DOI: http://dx.doi.org/10.12731/2218-7405-2013-8-29

  10. Integrodifferential relations in linear elasticity

    CERN Document Server

    Kostin, Georgy V

    2012-01-01

    This work treats the elasticity of deformed bodies, including the resulting interior stresses and displacements.It also takes into account that some of constitutive relations can be considered in a weak form. To discuss this problem properly, the method of integrodifferential relations is used, and an advanced numerical technique for stress-strain analysis is presented and evaluated using various discretization techniques. The methods presented in this book are of importance for almost all elasticity problems in materials science and mechanical engineering.

  11. Superluminal neutrino, flavor, and relativity

    OpenAIRE

    Klinkhamer, F. R.

    2011-01-01

    Modified neutrino dispersion relations, which still obey the relativity principle, can have both a superluminal (muon-type) neutrino and a luminal (electron-type) neutrino, as long as neutrino-mass effects can be neglected. The idea is to allow for flavor-dependent deformed Lorentz transformations and an appropriate hierarchy of energy scales. If OPERA's result on a superluminal velocity of the muon-neutrino is confirmed, the model has a matching superluminal velocity of the corresponding cha...

  12. PURA-related neurodevelopmental disorders

    OpenAIRE

    Reijnders, Margot R F; Leventer, Richard J; Lee, Boo Hon; Baralle, Diana; Selber, Paulo; Paciorkowski, Alex R; Hunt, David

    2017-01-01

    Clinical characteristics. PURA-related neurodevelopmental disorders include PURA syndrome, caused by a heterozygous pathogenic sequence variant in PURA, and 5q31.3 deletion syndrome, caused by a genomic 5q31.3 deletion encompassing all or part of PURA. PURA-related neurodevelopmental disorders are characterized by moderate to severe neurodevelopmental delay with absence of speech in most and lack of independent ambulation in many. Early-onset problems can include hypotonia, hypothermia, hyper...

  13. Communication through the Public Relations

    OpenAIRE

    Mihai Felea

    2004-01-01

    The Public Relations are considered as a main function of the management, with a continuous and systematic activity, the organisations trying to get with their help the sympathy and the support of the present and future public. Their purpose is mainly to establish and maintain the understanding between an organisation and its public, represented by all those groups of people whom this is in touch or wants to be in touch with. The specialists organized in Public Relation structures of a commer...

  14. Relational Expertise in Participatory Design

    DEFF Research Database (Denmark)

    Dindler, Christian; Iversen, Ole Sejer

    2014-01-01

    This paper positions relation expertise as a core competence in participatory design. It is an expertise that demands the participatory designer to stimulate the emergence of loosely coupled knotworks, and obtain symbiotic agreement between participants disregarding their professional and social...... status. We illustrate our theoretical argument for a relational expertise with a running example from a participatory design process engaging an interprofessional group of participants in a project on future technology enabled learning environments....

  15. General relativity 50 years old

    CERN Multimedia

    1966-01-01

    In May 1916, 'The Foundations of General Relativity Theory' by Albert Einstein was published in 'Annalen der Physik'. Fifty years later, this major contribution to scientific thought still has a rather isolated position with respect to the main-stream of scientific theory. (In contrast, the Special Theory of Relativity is one of the cornerstones of sub-nuclear physics.) To mark the anniversary of the publication of Einstein's paper a theoretician from CERN discusses the theory and its present status.

  16. Hyper-Hyponymic Relations in Terminology Expressing Investor Relations

    Directory of Open Access Journals (Sweden)

    Татьяна Аполинарьевна Сарангова

    2015-12-01

    Full Text Available The study described in this paper is a novel approach in the research of “Investor Relations”. The article draws attention to the phrase “Investor Relations” in Russian and English languages and carries out a comparative analysis of hyper-hyponymic relations with reference to nomination of people associated with Investor Relations. The main methods of research are component and definitional analyses, narrative and semantic-logical method. The research defines the term “Investor Relations”, and analyzes related terms from modern Russian and English such as: investor , analyst , shareholder , director , broker , manager. A comparative analysis of this thematic group reveals the distinctive characteristics of hyper-hyponymic relations of IR terminology. This analysis shows common features in the structural organization of this thematic group and the logical coherence of terminology. These findings are valuable not only for linguists, but also specialists in investor relations, employees of financial and investment companies and banks. It aims to promote more efficient communication in professional and business relationships.

  17. Relational citizenship: supporting embodied selfhood and relationality in dementia care.

    Science.gov (United States)

    Kontos, Pia; Miller, Karen-Lee; Kontos, Alexis P

    2017-02-01

    We draw on findings from a mixed-method study of specialised red-nosed elder-clowns in a long-term care facility to advance a model of 'relational citizenship' for individuals with dementia. Relational citizenship foregrounds the reciprocal nature of engagement and the centrality of capacities, senses, and experiences of bodies to the exercise of human agency and interconnectedness. We critically examine elder-clown strategies and techniques to illustrate how relational citizenship can be supported and undermined at the micro level of direct care through a focus on embodied expressions of creativity and sexuality. We identify links between aesthetic enrichment and relational practices in art, music and imagination. Relational citizenship offers an important rethinking of notions of selfhood, entitlement, and reciprocity that are central to a sociology of dementia, and it also provides new ethical grounds to explore how residents' creative and sexual expression can be cultivated in the context of long-term care. © 2017 Foundation for the Sociology of Health & Illness.

  18. Relationalism or why diplomats find international relations theory strange

    DEFF Research Database (Denmark)

    Adler-Nissen, Rebecca

    2015-01-01

    In this conclusion, which reflects critically on the relational approach to diplomacy and its wider consequences, I argue that diplomats are estranged from IR theory and vice versa - because International Relations scholars generally subscribe to substantialism, whereas diplomats tend to think...... of these phenomena (e.g. states or individuals) and ascribing certain characteristics to them, they develop substantive theories. Consequently, diplomacy is reduced to the mechanics of states bumping into each other or a system of reciprocal signaling. However, most diplomats know, in an embodied but often...

  19. Application of semi parametric modelling to times series forecasting: case of the electricity consumption; Modeles semi-parametriques appliques a la prevision des series temporelles. Cas de la consommation d'electricite

    Energy Technology Data Exchange (ETDEWEB)

    Lefieux, V

    2007-10-15

    Reseau de Transport d'Electricite (RTE), in charge of operating the French electric transportation grid, needs an accurate forecast of the power consumption in order to operate it correctly. The forecasts used everyday result from a model combining a nonlinear parametric regression and a SARIMA model. In order to obtain an adaptive forecasting model, nonparametric forecasting methods have already been tested without real success. In particular, it is known that a nonparametric predictor behaves badly with a great number of explanatory variables, what is commonly called the curse of dimensionality. Recently, semi parametric methods which improve the pure nonparametric approach have been proposed to estimate a regression function. Based on the concept of 'dimension reduction', one those methods (called MAVE : Moving Average -conditional- Variance Estimate) can apply to time series. We study empirically its effectiveness to predict the future values of an autoregressive time series. We then adapt this method, from a practical point of view, to forecast power consumption. We propose a partially linear semi parametric model, based on the MAVE method, which allows to take into account simultaneously the autoregressive aspect of the problem and the exogenous variables. The proposed estimation procedure is practically efficient. (author)

  20. Spatio-temporal forest cover characterisation of mascareignite zones of reunion Island; Caracterisation spatio-temporelle du couvert vegetal des zones a mascareignite des hauts de l'Ile de la Reunion

    Energy Technology Data Exchange (ETDEWEB)

    Ouar, S

    1998-07-01

    The endo-soils of the reunion island often present a particularity: the presence of a light soil level on surface, of vegetable composition, the mascareignite. In the framework of this study, mascareignite soils have been localized on the wet face of the island and have been compared with those of the dry face. The floristic past of these soils has been reconstituted with the pedo-anthracology tool (charcoal dating and identification). Ages given by the {sup 14}C measures show that the mascareignite genesis is anterior to the human being presence in the island. The study of the actual vegetable cover distribution has been realized by satellite data. (A.L.B.)

  1. Analyse de la variabilité spatio-temporelle des populations microalgales côtières observées par le REseau de surveillance du PHYtoplancton et des phycotoxines (REPHY)

    OpenAIRE

    Gailhard, Isabelle

    2003-01-01

    The dynamic of coastal marine microphytoplankton communities is characterized by successions of species assemblages displaying typical schemes of spatio-temporal variability. Numerous studies of phytoplankton spatio-temporal variability have concerned holistic variables such as total biomass or primary production. Such studies deal with the role of primary producers in the global functioning of the pelagic ecosystem, but have little relevance to other problematics. For instance, knowledge of ...

  2. Quel rôle de l’intégration des données spatio-temporelles dans la gestion de la nappe de Saïss ?

    Directory of Open Access Journals (Sweden)

    S. LARAICHI

    2017-03-01

    Full Text Available At the heart of Sebou basin, the Saïss plain contains two superimposed and inter-communicating aquifers. These aquifers play a significant role in the socio-economic development of the region through the satisfaction of drinking water and irrigation needs. From the 80’s and with the advent of drought, this groundwater has experienced strong over-exploitation, resulting in an annual deficit of 100 million m3. This issue caught the interest of the scientific community, thus producing a large mass of dispersed and heterogeneous data which need to be integrated into a single data warehouse. Exploring of this warehouse has allowed us to assess the development of Saïss groundwater resources through maps showing the location of water points and graphic drawing up the spatial and temporal evolution of piezometry and water sources flows. Certainly, the integration of spatial and temporal data in one data warehouse, to analyze and exploit them is considered a milestone in the process of a decision support system construction. However, it still faces several constraints and limitations such as uncertainty in the various stages of the integration process.

  3. Fusion de données spatiales (3D) et temporelles (2D+t) pour la reconstruction de scènes 3D+t : deux approches

    OpenAIRE

    Rekik, Wafa; Béréziat, Dominique; Dubuisson, Séverine

    2008-01-01

    Rapport de recherche LIP6; The main focus of this paper is 3D+t shape recovery from 3D spatial data framing 2D+t temporal sequences. Merging these two kind of data yields a temporal sequence describing 3D dynamic of structures of interest by reconstructing the original volume from each 2D frame. 2D to 3D inverse reconstruction is a complex and ill posed problem due to the great deal of distortion and in-depth information loss generated by the projective view in each 2D frame. To handle this c...

  4. Etude des oscillations des mésons de beauté par l'analyse de leur évolution temporelle avec le détecteur DELPHI à LEP

    CERN Document Server

    Chaussard, L

    1993-01-01

    Oscillations of $B^0_d$ and $B^0_s$ mesons have been studied at LEP with the DELPHI detector. In the Standard Model, the oscillation frequencies are linked with CP violation parameters, and the interest of their determination is presented in the first part. To reach a direct measurement of these oscillation frequencies, the B. proper time is reconstructed on an event-by-event basis .. After a description of the DELPHI detector, three chapters present the event selection and the algorithms used to reconstruct their geometrical and energetical characteristics. The energy reconstruction allows to measure the b quark fragmentation function, and its mean value is found to be : $x^b_E$ = 0.695 ± 0.015 (stat.)± 0.029. (syst.) Then, using one million hadronic $Z^0$ decays, a measurement of the $B^0_d$ oscillation frequency is derived from the selection of 240 events containing in opposite hemispheres two high Pt same sign leptons, one of them being accompanied by a D meson partially reconstructed in thtee charged t...

  5. DYNAMIQUE TEMPORELLE DE LA CONTRIBUTION DU REPEUPLEMENT EN STADES PRÉCOCES DE TRUITE (SALMO TRUTTA L. DANS LA POPULATION EN PLACE ET DANS LA PÊCHE SUR LE DOUBS FRANCO-SUISSE.

    Directory of Open Access Journals (Sweden)

    CHAMPIGNEULLE A.

    2002-04-01

    Full Text Available La technique de fluoromarquage des otolithes a permis d’évaluer à grande échelle les pratiques d’alevinage de truite (Salmo trutta L. à des stades précoces (540 000-570 000 alevins/an, la plupart vésiculés pour trois cohortes (1994-95-96 dans une partie du Doubs longue de 40 km et fractionnée en trois zones (amont, moyenne et aval par des aménagements hydroélectriques. Il y a une relativement forte contribution (23 à 60 % selon les cohortes et les zones des alevins de repeuplement à la population de 0+ en place en début automne. Le marquage de la totalité des alevins déversés a permis de montrer que les dynamiques de contribution des deux composantes (recrutement naturel et repeuplement diffèrent. En effet, la contribution de l’alevinage s’érode au cours du temps au niveau de la population en place en zone courante peu profonde (< 1,2 m. La baisse du taux de marqués a été forte entre les stades 1+ et 2+ pour la cohorte 1994 et elle a eu lieu plus précocement, entre les stades 0+ et 1+, pour la cohorte 1995. Sur les zones moyenne et aval, au delà du stade 0+, la contribution du recrutement naturel est toujours largement dominante dans la population en place. L’étude dans la pêche de loisir a mis en évidence un plus fort taux de truites marquées parmi les truites capturées par la pêche de loisir comparativement aux truites de la même cohorte échantillonnées l’année antérieure par pêche électrique en zone courante dans la population automnale en place. Le taux de marquées parmi les truites capturées jeunes, à 2+, est relativement élevé (12,5 % à 45,8 % selon la zone. Cependant le taux de marqués diminue fortement avec l’âge dans la pêche de loisir et, globalement, la majorité des truites prélevées par la pêche de loisir dans le Doubs franco-suisse reste issue du recrutement naturel.

  6. ÉVOLUTION SPATIO-TEMPORELLE DE LA CONTRIBUTION DU REPEUPLEMENT EN TRUITE (SALMO TRUTTA L. RÉALISÉ A DES STADES PRÉCOCES DANS LE BASSIN AMONT DU FIER (74.

    Directory of Open Access Journals (Sweden)

    CAUDRON A.

    2002-04-01

    Full Text Available Les pratiques de repeuplement en truite à des stades précoces (alevins nourris et truitelles 3-5 cm ont été évaluées par la technique de fluoromarquage des otolithes sur le bassin amont du Fier pour trois cohortes (1995, 1996, 1997. La contribution du repeuplement et du recrutement naturel a été suivie à la fois dans la population en place et dans les captures par pêche à la ligne. Au stade 0+ en place à l’automne, la contribution des poissons alevinés est relativement importante pour les trois cohortes considérées. Cependant, l’analyse du rapport entre le nombre d’alevins introduits au printemps et le nombre de truitelles recapturées à l’automne fait apparaître un taux d’implantation très faible des 0+ marqués quelle que soit la densité alevinée. La contribution des marqués chute brutalement au stade 1+ en place (cohorte 95 et 96 et devient très faible. Cette tendance se poursuit au stade 2+ en place pour la cohorte 95 avec des taux de marqués qui diminuent encore. Dans les captures par pêche à la ligne le taux de 2+ marqués est supérieur à celui observé dans la population en place à l’automne mais la contribution du recrutement naturel reste toujours dominante. Ensuite, la contribution de repeuplement suit la même dynamique que dans la population en place puisqu’il diminue avec l’âge. Elle devient négligeable au stade 3+ et nulle à partir de 4+.

  7. Contribution à l'analyse des systèmes pilotés par calculateurs : extraction de scénarios redoutés et vérification de contraintes temporelles

    OpenAIRE

    Medjoudj, Malika

    2006-01-01

    The progressive integration of electronics in the car and avionics fields has lead to improvements in both functions and services. However, this has caused an increased complexity in the design of these systems, typically involving computers (e.g. mecatronic systems, flight computers, etc.), which makes the control of their reliability difficult. In addition, the phase of design must be fast and inexpensive (i.e. less prototypes and at later stages) with a level of guaranteed safety. In more ...

  8. Processus d'activation-inhibition, variabilité, invariance temporelle : processus et facteurs du développement des coordinations et du contrôle dans les habiletés de frappe chez l'enfant

    OpenAIRE

    Rosey, Florence

    2004-01-01

    L’objectif de ce travail était d'éprouver la fonctionnalité du processus d'activationinhibition sur le développement des coordinations et le contrôle du mouvement, dans le cadre particulier de l'habileté de frappe d'un mobile chez l’enfant de 3 à 10 ans. Nous avons tout d'abord testé, dans une étude transversale pour cinq catégories d'âge (6 à 10 ans), l'hypothèse que les fonctions exécutives d'activation-inhibition sont un des facteurs à l'origine de l'apparition de structures motrices. A ce...

  9. Development and applications of coherent imaging with improved temporal and spatial resolution; Developpement et applications de l'imagerie coherente aux rayons X a tres haute resolution spatiale et temporelle

    Energy Technology Data Exchange (ETDEWEB)

    Mokso, Rajmund

    2006-07-01

    This work has 2 purposes: the improvement of both temporal and spatial resolution of X-ray tomography. The first part is devoted to the technical aspects of the tomographic technique, particularly at the ESRF (European Synchrotron Radiation Facility) beamline ID19, and the application of the new acquisition scheme to the imaging of liquid foams. We have improved the temporal resolution and field of view of the setup, which allowed to obtain for the first time experimental data with good statistics on three dimensional liquid foams. In the second part of the thesis we have described the Kirkpatrick-Baez focusing system and its first applications. In terms of stability and image quality the developments presented in this part of the thesis provide valuable evidence for the feasibility of phase contrast tomography in magnifying geometry. Since the ultimate goal of this research is to improve the spatial resolution in tomography for applications, four different contributions are important for the characterization of the imaging system: 1) the thermal stability and mechanical imperfections, 2) effects of distortion induced by mirror imperfections, 3) effects of refraction on sample borders, and 4) phase propagation effects with the influence of the magnification. Each of these factors has been studied.

  10. Cancers du sein (féminin) et du foie en Afrique de l’Ouest : évolution temporelle de l’incidence et évaluation des facteurs de risque en Gambie et au Mali

    OpenAIRE

    Sighoko Mawadzoue, Frida Dominique

    2011-01-01

    In Sub-Saharan Africa, the exact burden of cancer remains largely unknown and understudied. The Gambia and Mali are among the few African countries with operational population-based cancer registries. Data from 1988 to 2006 for the Gambia and from 1987 to 2009 for Bamako-Mali were used to analyze the incidence rates according to age, sex and ethnicity and to characterize the profile of women with breast and liver cancers. The data were arbitrarily divided into two periods, 1988-1997 and 1998-...

  11. Importance of space-time fluctuations and non-linearities for the transport inside insulating glasses; Importance des fluctuations spatio-temporelles et des non linearites pour le transport dans les verres isolants

    Energy Technology Data Exchange (ETDEWEB)

    Ladieu, F

    2003-07-01

    This work deals with transport in insulating glasses. In such solids, the discrete translational symmetry is lost, which means that the plane wave analysis is not a priori the right 'starting point'. As a result, the transport is more difficult to handle, and a huge amount of works have been devoted to many aspects of transport in disordered systems, especially since the seventies. Here we focus on three specific questions: (i) the heat transport in glasses submitted to micro-beams and the associated irreversible vaporization; (ii) the electronic d.c. transport, below 1 Kelvin, in Mott-Anderson insulators, i.e. in 'electron glasses' where both disorder and electron-electron interactions are relevant; (iii) the low frequency dielectric constant in 'structural glasses' (i.e. 'ordinary glasses') which, below 1 Kelvin, is both universal (i.e. independent on the chemical composition) and very different of that of crystals. For each topic, we present both original experiments and the new theoretical concepts that we have elaborated so as to understand the main experimental features. Eventually, it appears that, in any case, transport in insulating glasses is strongly dominated by quite a small part of the 'glass-applied field' ensemble and that the nonlinear response is a relevant tool to get informations on this 'sub-part' which dominates the transport in the whole system. (author)

  12. Variations et variabilité spatio-temporelle des argilites callovo-oxfordiennes de Meuse/Haute-Marne : valorisation géostatistique des données diagraphiques

    OpenAIRE

    Lefranc, Marie

    2007-01-01

    Andra (National Radioactive Waste Management Agency) has conducted studies in its Meuse/Haute-Marne Underground Research Laboratory located at a depth of about 490 m in a 155-million-year-old argillaceous rock: the Callovo-Oxfordian argillite. The purpose of the present work is to obtain as much information as possible from high-resolution log data and to optimize their analysis to specify and characterize space-time variations of the argillites from the Meuse/Haute-Marne site and subsequentl...

  13. On Borel equivalence relations related to self-adjoint operators

    DEFF Research Database (Denmark)

    Ando, Hiroshi; Matsuzawa, Yasumichi

    2015-01-01

    In a recent work, we initiated the study of Borel equivalence relations defined on the Polish space ${\\rm{SA}}(H)$ of self-adjoint operators on a Hilbert space $H$, focusing on the difference between bounded and unbounded operators. In this paper, we show how the difficulty of specifying...

  14. Researcher/Researched: Relations of Vulnerability/Relations of Power

    Science.gov (United States)

    Huckaby, M. Francyne

    2011-01-01

    Turning to reflexive journals and fieldnotes, the author reconsiders Foucault's "relations of power" through her experiences with five research participants, who are professors of education. The paper explores: (1) the translation of Foucault for an analysis of power; (2) the dynamics of researching up and analyzing from below; and (3) the…

  15. Absoluteness or relativity of morality

    Directory of Open Access Journals (Sweden)

    I. A. Kadievskaya

    2014-02-01

    Full Text Available Article is dedicated to the case study of absoluteness or relativity of morals. The questions are in a new way comprehended: Can exist absolute morals? Is how its content? Is necessary it for humanity? Is moral personality absolute value? Does justify the purpose of means? It is substantiated, that reflecting about the problem of absoluteness or relativity of morals, one ought not to be abstracted from the religion ­ billions of people find in it the basis of their morals. Accumulated ethical experience is infinitely rich and diverse in humanity: it includes and the proclaimed prophets godly revelations, and the brilliant enlightenment of secular philosophers. Are analyzed such concepts, as morals, absolute morals, relativity, moral rigorizm, moral personality, formal ethics. The specific character of the moral relativity, which proclaims historicity and changeability of standards and standards of human behavior, is established. Moral rigorizm is understood as the principle, according to which the man must act only from the considerations of moral debt, whereas all other external motivations (interest, happiness, friendship, etc have no moral value. Is shown the priority significance of the nerigoristskoy formal ethics, in which strong idealizations and abstractions of the ethics of moral rigorizma are substituted by the weaker ­ more realistic and more humane. In the nerigoristskoy formal ethics, as in the life, moral estimations completely can be and in the overwhelming majority of the cases are relative.

  16. Global income related health inequalities

    Directory of Open Access Journals (Sweden)

    Jalil Safaei

    2007-01-01

    Full Text Available Income related health inequalities have been estimated for various groups of individuals at local, state, or national levels. Almost all of theses estimates are based on individual data from sample surveys. Lack of consistent individual data worldwide has prevented estimates of international income related health inequalities. This paper uses the (population weighted aggregate data available from many countries around the world to estimate worldwide income related health inequalities. Since the intra-country inequalities are subdued by the aggregate nature of the data, the estimates would be those of the inter-country or international health inequalities. As well, the study estimates the contribution of major socioeconomic variables to the overall health inequalities. The findings of the study strongly support the existence of worldwide income related health inequalities that favor the higher income countries. Decompositions of health inequalities identify inequalities in both the level and distribution of income as the main source of health inequality along with inequalities in education and degree of urbanization as other contributing determinants. Since income related health inequalities are preventable, policies to reduce the income gaps between the poor and rich nations could greatly improve the health of hundreds of millions of people and promote global justice. Keywords: global, income, health inequality, socioeconomic determinants of health

  17. Relational uncertainty in service dyads

    DEFF Research Database (Denmark)

    Kreye, Melanie

    2017-01-01

    in service dyads and how they resolve it through suitable organisational responses to increase the level of service quality. Design/methodology/approach: We apply the overall logic of Organisational Information-Processing Theory (OIPT) and present empirical insights from two industrial case studies collected...... via semi-structured interviews and secondary data. Findings: The findings suggest that relational uncertainty is caused by the partner’s unresolved organisational uncertainty, i.e. their lacking capabilities to deliver or receive (parts of) the service. Furthermore, we found that resolving...... the relational uncertainty increased the functional quality while resolving the partner’s organisational uncertainty increased the technical quality of the delivered service. Originality: We make two contributions. First, we introduce relational uncertainty to the OM literature as the inability to predict...

  18. Special relativity a heuristic approach

    CERN Document Server

    Hassani, Sadri

    2017-01-01

    Special Relativity: A Heuristic Approach provides a qualitative exposition of relativity theory on the basis of the constancy of the speed of light. Using Einstein's signal velocity as the defining idea for the notion of simultaneity and the fact that the speed of light is independent of the motion of its source, chapters delve into a qualitative exposition of the relativity of time and length, discuss the time dilation formula using the standard light clock, explore the Minkowski four-dimensional space-time distance based on how the time dilation formula is derived, and define the components of the two-dimensional space-time velocity, amongst other topics. Provides a heuristic derivation of the Minkowski distance formula Uses relativistic photography to see Lorentz transformation and vector algebra manipulation in action Includes worked examples to elucidate and complement the topic being discussed Written in a very accessible style

  19. Recursion Relations for Conformal Blocks

    CERN Document Server

    Penedones, João; Yamazaki, Masahito

    2016-09-12

    In the context of conformal field theories in general space-time dimension, we find all the possible singularities of the conformal blocks as functions of the scaling dimension $\\Delta$ of the exchanged operator. In particular, we argue, using representation theory of parabolic Verma modules, that in odd spacetime dimension the singularities are only simple poles. We discuss how to use this information to write recursion relations that determine the conformal blocks. We first recover the recursion relation introduced in 1307.6856 for conformal blocks of external scalar operators. We then generalize this recursion relation for the conformal blocks associated to the four point function of three scalar and one vector operator. Finally we specialize to the case in which the vector operator is a conserved current.

  20. Aspergillus-Related Lung Disease

    Directory of Open Access Journals (Sweden)

    Alia Al-Alawi

    2005-01-01

    Full Text Available Aspergillus is a ubiquitous dimorphic fungus that causes a variety of human diseases ranging in severity from trivial to life-threatening, depending on the host response. An intact host defence is important to prevent disease, but individuals with pre-existing structural lung disease, atopy, occupational exposure or impaired immunity are susceptible. Three distinctive patterns of aspergillus-related lung disease are recognized: saprophytic infestation of airways, cavities and necrotic tissue; allergic disease including extrinsic allergic alveolitis, asthma, allergic bronchopulmonary aspergillosis, bronchocentric granulomatosis and chronic eosinophilic pneumonia; and airway and tissue invasive disease -- pseudomembranous tracheobronchitis, acute bronchopneumonia, angioinvasive aspergillosis, chronic necrotizing aspergillosis and invasive pleural disease. A broad knowledge of these clinical presentations and a high index of suspicion are required to ensure timely diagnosis and treatment of the potentially lethal manifestations of aspergillus-related pulmonary disease. In the present report, the clinical, radiographic and pathological aspects of the various aspergillus-related lung diseases are briefly reviewed.

  1. Pseudo-complex general relativity

    CERN Document Server

    Hess, Peter O; Greiner, Walter

    2016-01-01

    This volume presents an pseudo-complex extension of General Relativity which addresses these issues and presents proposals for experimental examinations in strong fields near a large mass. General Relativity is a beautiful and well tested theory of gravitation. Nevertheless, it implies conceptual problems like the creation of singularities (Black Holes) as a result of the collapse of large masses, or the appearance of event horizons which exclude parts of the space-time from the observation of external observers. The mathematical and geometrical foundations of this extension are displayed in detail, and applications including orbits and accretion disks around large central masses, neutron stars or cosmological models are introduced. Calculations both for classical and extended applications are often executed in the form of problems with extensive solutions, which makes this volume also a valuable resource for any student of General Relativity.

  2. Umayyad Relations with Byzantium Empire

    Directory of Open Access Journals (Sweden)

    Mansoor Haidari

    2017-06-01

    Full Text Available This research investigates the political and military relations between Umayyad caliphates with the Byzantine Empire. The aim of this research is to clarify Umayyad caliphate’s relations with the Byzantine Empire. We know that these relations were mostly about war and fight. Because there were always intense conflicts between Muslims and the Byzantine Empire, they had to have an active continuous diplomacy to call truce and settle the disputes. Thus, based on the general policy of the Umayyad caliphs, Christians were severely ignored and segregated within Islamic territories. This segregation of the Christians was highly affected by political relationships. It is worthy of mentioning that Umayyad caliphs brought the governing style of the Sassanid kings and Roman Caesar into the Islamic Caliphate system but they didn’t establish civil institutions and administrative organizations.

  3. Anti-de Sitter relativity

    Science.gov (United States)

    Cotǎescu, Ion I.

    2017-08-01

    The relative geodesic motion on (1 +3 )-dimensional anti-de Sitter spacetimes is studied in terms of conserved quantities by adapting the Nachtmann boosting method created initially for de Sitter spacetimes. In this approach the Lorentzian isometry is derived, relating the coordinates of the local chart of a fixed observer with the coordinates of a mobile chart considered as the rest frame of a massive mobile object moving on a timelike anti-de Sitter geodesic. The transformation of the conserved quantities is also investigated, constructing thus a complete theory of the relative geodesic motion on anti-de Sitter spacetimes. Some applications are discussed, among which the problems of twin paradox and Lorentz contraction are solved.

  4. The genesis of general relativity

    CERN Document Server

    Norton, John; Renn, Jürgen; Sauer, Tilman; Stachel, John

    2007-01-01

    This four-volume work represents the most comprehensive documentation and study of the creation of general relativity; one of the fundamental physical theories of the 20th century. It comprises key sources from Einstein and others who from the late 19th to the early 20th century contributed to this monumental development. Some of these sources are presented here in translation for the first time. Einstein’s famous Zurich notebook, which documents the pivotal steps toward general relativity, is reproduced here for the first time and transcribed in its entirety. The volumes offer detailed commentaries and analyses of these sources that are based on a close reading of these documents supplemented by interpretations by the leading historians of relativity. All in all, the facets of this work, based on more than a decade of research, combine to constitute one of the most in-depth studies of a scientific revolution ever written.

  5. Motion Control along Relative Equilibria

    DEFF Research Database (Denmark)

    Nordkvist, Nikolaj

    2008-01-01

    The subject of this thesis is control of mechanical systems as they evolve along the steady motions called relative equilibria. These trajectories are of interest in theory and applications and have the characterizing property that the system's body-fixed velocity is constant. For example, constant......-speed rotation about a principal axis is a relative equilibrium of a rigid body in three dimensions. We focus our study on simple mechanical control systems on Lie groups, i.e., mechanical systems with the following properties: the configuration manifold is a matrix Lie group, the total energy is equal...... on a Lie group is locally controllable along a relative equilibrium. These conditions subsume the well-known local controllability conditions for equilibrium points. Second, for systems that have fewer controls than degrees of freedom, we present a novel algorithm to control simple mechanical control...

  6. Ethnicity effects in relative pitch.

    Science.gov (United States)

    Hove, Michael J; Sutherland, Mary Elizabeth; Krumhansl, Carol L

    2010-06-01

    Absolute pitch (AP), the rare ability to identify a musical pitch, occurs at a higher rate among East Asian musicians. This has stimulated considerable research on the comparative contributions of genetic and environmental factors. Two studies examined whether a similar ethnicity effect is found for relative pitch (RP), identifying the distance or interval between two tones. Nonmusicians (n = 103) were trained to label musical intervals and were subsequently tested on interval identification. We establish similar ethnicity effects: Chinese and Korean participants consistently outperformed other participants in RP tasks, but not in a "relative rhythm" control task. This effect is not driven by previous musical or tone-language experience. The parallel with the East Asian advantage for AP suggests that enhanced perceptual-cognitive processing of pitch is more general and is not limited to highly trained musicians. This effect opens up many research questions concerning the environmental and genetic contributions related to this more general pitch-based ability.

  7. The biomedical discourse relation bank.

    Science.gov (United States)

    Prasad, Rashmi; McRoy, Susan; Frid, Nadya; Joshi, Aravind; Yu, Hong

    2011-05-23

    Identification of discourse relations, such as causal and contrastive relations, between situations mentioned in text is an important task for biomedical text-mining. A biomedical text corpus annotated with discourse relations would be very useful for developing and evaluating methods for biomedical discourse processing. However, little effort has been made to develop such an annotated resource. We have developed the Biomedical Discourse Relation Bank (BioDRB), in which we have annotated explicit and implicit discourse relations in 24 open-access full-text biomedical articles from the GENIA corpus. Guidelines for the annotation were adapted from the Penn Discourse TreeBank (PDTB), which has discourse relations annotated over open-domain news articles. We introduced new conventions and modifications to the sense classification. We report reliable inter-annotator agreement of over 80% for all sub-tasks. Experiments for identifying the sense of explicit discourse connectives show the connective itself as a highly reliable indicator for coarse sense classification (accuracy 90.9% and F1 score 0.89). These results are comparable to results obtained with the same classifier on the PDTB data. With more refined sense classification, there is degradation in performance (accuracy 69.2% and F1 score 0.28), mainly due to sparsity in the data. The size of the corpus was found to be sufficient for identifying the sense of explicit connectives, with classifier performance stabilizing at about 1900 training instances. Finally, the classifier performs poorly when trained on PDTB and tested on BioDRB (accuracy 54.5% and F1 score 0.57). Our work shows that discourse relations can be reliably annotated in biomedical text. Coarse sense disambiguation of explicit connectives can be done with high reliability by using just the connective as a feature, but more refined sense classification requires either richer features or more annotated data. The poor performance of a classifier trained

  8. Gravitation. [Book on general relativity

    Science.gov (United States)

    Misner, C. W.; Thorne, K. S.; Wheeler, J. A.

    1973-01-01

    This textbook on gravitation physics (Einstein's general relativity or geometrodynamics) is designed for a rigorous full-year course at the graduate level. The material is presented in two parallel tracks in an attempt to divide key physical ideas from more complex enrichment material to be selected at the discretion of the reader or teacher. The full book is intended to provide competence relative to the laws of physics in flat space-time, Einstein's geometric framework for physics, applications with pulsars and neutron stars, cosmology, the Schwarzschild geometry and gravitational collapse, gravitational waves, experimental tests of Einstein's theory, and mathematical concepts of differential geometry.

  9. Persondata i relation til ting

    DEFF Research Database (Denmark)

    Blume, Peter

    2011-01-01

    En intelligent verden er under udvikling. En verden, hvor stadig flere ting har indbygget digital teknologi, der indsamler personoplysninger med henblik på at lette borgernes tilværelseog for at realisere samfundsmæssige målsætninger. Atiklen vedrører især anvendelsen af intelligente ting i relat...... relation til måling af energiforbrug m.v. Dette kan medføre en øget anvendelse af persondata, og på denne baggrund sætter artiklen fokus på, hvorledes persondataretten finder anvendelse i denne sammenhæng....

  10. Entrepreneurial Relations of Pakistani Entrepreneurs

    Directory of Open Access Journals (Sweden)

    Abeer Pervaiz

    2015-10-01

    Full Text Available This study aims at understanding entrepreneurial relations between Pakistani and Western entrepreneurs. It emphasizes the concept of national culture and tries to determine how Pakistani entrepreneurs are able to manage relations with their foreign clients in an economic downturn. The qualitative study consists of interviews conducted with various entrepreneurs of Pakistan. Political instability emerged as a major trial that most entrepreneurs faced, which in turn lead to reluctance, reliability, and trust issues among foreign investors. Despite cultural differences and economic challenges, Pakistani entrepreneurs are willing to work hard to maintain their relationships with foreign entrepreneurs.

  11. Nonmonotonic Onto-Relational Learning

    Science.gov (United States)

    Lisi, Francesca A.; Esposito, Floriana

    In this paper we carry on the work on Onto-Relational Learning by investigating the impact of having disjunctive Datalog with default negation either in the language of hypotheses or in the language for the background theory. The inclusion of nonmonotonic features strengthens the ability of our ILP framework to deal with incomplete knowledge. One such ability can turn out to be useful in application domains, such as the Semantic Web. As a showcase we face the problem of inducing an integrity theory for a relational database whose instance is given and whose schema encompasses an ontology and a set of rules linking the database to the ontology.

  12. Functional statistics and related fields

    CERN Document Server

    Bongiorno, Enea; Cao, Ricardo; Vieu, Philippe

    2017-01-01

    This volume collects latest methodological and applied contributions on functional, high-dimensional and other complex data, related statistical models and tools as well as on operator-based statistics. It contains selected and refereed contributions presented at the Fourth International Workshop on Functional and Operatorial Statistics (IWFOS 2017) held in A Coruña, Spain, from 15 to 17 June 2017. The series of IWFOS workshops was initiated by the Working Group on Functional and Operatorial Statistics at the University of Toulouse in 2008. Since then, many of the major advances in functional statistics and related fields have been periodically presented and discussed at the IWFOS workshops. .

  13. General relativity and gravitational waves

    CERN Document Server

    Weber, Johanna

    1961-01-01

    An internationally famous physicist and electrical engineer, the author of this text was a pioneer in the investigation of gravitational waves. Joseph Weber's General Relativity and Gravitational Waves offers a classic treatment of the subject. Appropriate for upper-level undergraduates and graduate students, this text remains ever relevant. Brief but thorough in its introduction to the foundations of general relativity, it also examines the elements of Riemannian geometry and tensor calculus applicable to this field.Approximately a quarter of the contents explores theoretical and experimenta

  14. The special theory of relativity

    CERN Document Server

    Devanathan, V

    2015-01-01

    THE SPECIAL THEORY OF RELATIVITY, designed as a text book for undergraduate and postgraduate students, deals with the Michelson-Morley experiment, the concept of unified space and time, the Lorentz transformation of physical quantities, length contraction, time dilation, the Minkowski space, the mass-energy relation, the concept of four-vectors, the relativistic mechanics, the laws of transformation between centre of momentum and laboratory systems, the relativistic kinematics, the unification of laws of electricity and magnetism into laws of electromagnetism, the invariance of Maxwell's equations under Lorentz transformation and the Lorentz transformation of electromagnetic quantities. KEY FEATURES: * Review Questions * Problems * Solutions to Problems * Multiple Choice Questions

  15. Computer-Related Task Performance

    DEFF Research Database (Denmark)

    Longstreet, Phil; Xiao, Xiao; Sarker, Saonee

    2016-01-01

    The existing information system (IS) literature has acknowledged computer self-efficacy (CSE) as an important factor contributing to enhancements in computer-related task performance. However, the empirical results of CSE on performance have not always been consistent, and increasing an individual......'s CSE is often a cumbersome process. Thus, we introduce the theoretical concept of self-prophecy (SP) and examine how this social influence strategy can be used to improve computer-related task performance. Two experiments are conducted to examine the influence of SP on task performance. Results show...

  16. Results from Numerical General Relativity

    Science.gov (United States)

    Baker, John G.

    2011-01-01

    For several years numerical simulations have been revealing the details of general relativity's predictions for the dynamical interactions of merging black holes. I will review what has been learned of the rich phenomenology of these mergers and the resulting gravitational wave signatures. These wave forms provide a potentially observable record of the powerful astronomical events, a central target of gravitational wave astronomy. Asymmetric radiation can produce a thrust on the system which may accelerate the single black hole resulting from the merger to high relative velocity.

  17. The initial value problem as it relates to numerical relativity

    CERN Document Server

    Tichy, Wolfgang

    2016-01-01

    Spacetime is foliated by spatial hypersurfaces in the 3+1 split of General Relativity. The initial value problem then consists of specifying initial data for all relevant fields on one such a spatial hypersurface. These fields are the 3-metric and extrinsic curvature together with matter fields such as fluid velocity, energy density and rest mass density. There is a lot of freedom in choosing such initial data. This freedom corresponds to the physical state of the system at the initial time. At the same time the initial data have to satisfy the Hamiltonian and momentum constraint equations of General Relativity and can thus not be chosen completely freely. We discuss the conformal transverse traceless and conformal thin sandwich decompositions that are commonly used in the construction of constraint satisfying initial data. These decompositions allow us to specify certain free data that describe the physical nature of the system. The remaining metric fields are then determined by solving elliptic equations de...

  18. BOOK REVIEW An Introduction to Relativity An Introduction to Relativity

    Science.gov (United States)

    Dray, Tevian

    2011-02-01

    As is clearly stated in the preface, this book is a fresh rewrite of Narlikar's published lecture notes [1] from 1978, resulting in a unique historical perspective with a modernized presentation. For workers in the field, this book provides a fascinating glimpse of the state of the art 30 years ago, but there are some inevitable idiosyncracies which might make it less useful to the beginner, especially those attempting to read this book on their own. The author is well-known for his informal, readable style, and this book is no exception. Although the treatment is overly algebraic from this reviewer's modern perspective, that is not necessarily a drawback, and does accurately reflect contemporary usage. This text is a `math first' approach to relativity, presenting the tensor calculus first, and the physics second. Not surprisingly given the author's interests, there is an emphasis on cosmological applications. After a quick review of special relativity, the book jumps right in with a fairly standard introduction to tensor calculus, followed almost immediately by chapters on Einstein's equations, the Schwarzschild solution, experimental tests, relativistic astrophysics, and black holes, followed in turn by several chapters on cosmology. This new text is a faithful adaptation of the earlier text, with essentially identical tables of contents. In fact, the only notable differences are the opening chapter summarizing special relativity, a brief new chapter on gravitational radiation, and the exclusion of a lecture on the Steady State Theory — and that material appears separately in the author's cosmology text [2]. Some of the material, such as the excellent chapter on symmetries, is largely identical to the original, but most of the material has been extensively rewritten, with most of the changes being to presentation, rather than content. There are some seldom seen gems in this book, such as the aforementioned discussion of symmetries, the extensive discussion of

  19. Local and Transnational Care Relations

    DEFF Research Database (Denmark)

    Dalgas, Karina Märcher; Olwig, Karen Fog

    2015-01-01

    as transnational family relations in which these women are embedded as au pairs, and the opportunities and restraints that they present. We use anthropological theory to conceptualize family and kinship in terms of notions and practices of relatedness. This offers a useful framework for elucidating the different...

  20. Industrial relations in agriculture examined

    NARCIS (Netherlands)

    Schaapman, M.H.

    2003-01-01

    Agriculture remains an important part of the Dutch economy, accounting for around 10%of GDP . The sector is currently undergoing major changes in terms of production, markets and technology, with important implications for employment. This article examines industrial relations in agriculture,

  1. relation between helicobacter pylori, inflammatory

    African Journals Online (AJOL)

    User

    Sept. 2008 Vol 11(3):270-274. RELATION BETWEEN HELICOBACTER PYLORI, INFLAMMATORY. (NEUTROPHIL) ACTIVITY, CHRONIC GASTRITIS, GASTRIC ATROPHY AND. INTESTINAL METAPLASIA. *M. N Tanko, *A. N Manasseh,*G.O Echejoh, *B. M. Mandong , **A. O Malu , **E. N Okeke, **N. Ladep , **E. I. Agaba.

  2. Stroke-Related Translational Research

    Science.gov (United States)

    Caplan, Louis R.; Arenillas, Juan; Cramer, Steven C.; Joutel, Anne; Lo, Eng H.; Meschia, James; Savitz, Sean; Tournier-Lasserve, Elizabeth

    2013-01-01

    Stroke-related translational research is multifaceted. Herein, we highlight genome-wide association studies and genetic studies of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy, COL4A1 mutations, and cerebral cavernous malformations; advances in molecular biology and biomarkers; newer brain imaging research; and recovery from stroke emphasizing cell-based and other rehabilitative modalities. PMID:21555605

  3. Building Relations with Radiology Administrators

    Directory of Open Access Journals (Sweden)

    Megan Kalambo

    2017-06-01

    Full Text Available In some radiology departments, the lack of alignment between administrators and radiologists can pose significant challenges. This article describes how differences in background and priorities between administrators and radiologists can contribute to conflict and presents strategies on how to manage the conflict in a way that can leverage positive change. Strategies to build relations between radiologists and radiology administrators are described.

  4. Building Relations with Radiology Administrators.

    Science.gov (United States)

    Kalambo, Megan; Parikh, Jay R

    2017-06-07

    In some radiology departments, the lack of alignment between administrators and radiologists can pose significant challenges. This article describes how differences in background and priorities between administrators and radiologists can contribute to conflict and presents strategies on how to manage the conflict in a way that can leverage positive change. Strategies to build relations between radiologists and radiology administrators are described.

  5. Intervention in Vertical Intergroup Relations.

    Science.gov (United States)

    Brown, L. Dave

    This paper describes four cases of intervention in the relations between groups of widely differing social status and power. "Dialogs" between high corporate executives and social activities from urban poverty areas in three cities were supported by a foundation interested in promoting long term cooperation between the groups on social projects of…

  6. Thinking Relationally about Studying "Up"

    Science.gov (United States)

    Stich, Amy E.; Colyar, Julia E.

    2015-01-01

    In this paper, the authors argue that despite a resurgence of elite studies, the majority of existing scholarship works to reify and legitimize social inequality through its language and method. In particular, the authors utilize Pierre Bourdieu's concept of relational thinking to review and critique contemporary research on elite education and…

  7. Relational Algebra Teaching Support Tool

    Directory of Open Access Journals (Sweden)

    Jonathas Jivago de Almeida Cruz

    2017-01-01

    Full Text Available In recent years, there has been an increasing supply of digital, pedagogical tools, known as Digital Learning Objects (DLO – digital resources (image, film, animation, etc. and software developed specifically for educational purposes. In the area of Computer Science, teaching Databases present a particular challenge because of a lack of quality tools to work with Relational Algebra. The present study proposes a web-based tool to support teaching and learning Relational Algebra – an important subject that is particularly difficult for students to understand. The purpose of the proposed tool is to provide an alternative method for teaching Relational Algebra operations, such as: selection, projection, union, set difference, rename, intersection, Cartesian product, natural join, division and some aggregate functions. In addition, we propose a graphic definition of a database schema (using features such as drag and drop, column highlights, lines, fields, etc., so students can use the tool easily, and in conjunction with the theory taught regarding the definition languages (DDL and data manipulation (DML. We intend for this tool to serve as an appropriate means for teaching and learning Relational Algebra, contributing to the development of new teaching skills, as well motivating the students in the process of learning.

  8. Honduran-U.S. Relations

    Science.gov (United States)

    2010-02-01

    December 9, 2009; “¿Renovarse o morir? (Editorial),” El Tiempo (Honduras), January 26, 2010. . Honduran-U.S. Relations Congressional Research Service 6...Palencia “Nuevo Gobierno Honduras busca aplacar violencia ligada al narco,” Reuters, January 28, 2010. 41 “Honduras politics: Lobo takes charge

  9. Behavioral Research in Industrial Relations.

    Science.gov (United States)

    Lewin, David; Feuille, Peter

    1983-01-01

    This paper examines and assesses the behavioral content of industrial relations research in a variety of social science disciplines. The authors compare economic research on the wage and productivity consequences of unionism with psychological research on worker attitudes toward unions, sociological research on the negotiation process and conflict…

  10. Towards Online Relational Schema Transformations

    NARCIS (Netherlands)

    Wevers, L.; Hofstra, M; Tammens, M; Huisman, Marieke; van Keulen, Maurice

    2014-01-01

    Current relational database systems are ill-equipped for changing the structure of data while the database is in use. This is a real problem for systems for which we expect 24/7 availability, such as telecommunication, payment, and control systems. As a result, developers tend to avoid making

  11. LOCAL GOVERNMENT AND INTERGOVERNMENTAL RELATIONS ...

    African Journals Online (AJOL)

    GRACE

    Power Federations has considered power as an important tool in intergovernmental relations. Kelemen (2004) argues that in parliamentary federations, especially those of the executive- dominant Westminster type, the combination of a fusion of executive-legislative powers at both levels of the federal system and in upper ...

  12. Curriculum Vitae and Related Letters.

    Science.gov (United States)

    Peterson, Sharyl Bender

    This booklet, which was developed by a college career center, explains the purpose of and procedures for writing curriculum vitae (CV) and related letters. The following topics are covered: when a CV is appropriate, points to consider when writing a CV, items usually included, possible sections to include in a CV, and steps in writing cover…

  13. Counting relations on Ockham algebras

    OpenAIRE

    Davey, Brian A.; Nguyen, Long T.; Pitkethly, Jane G.

    2015-01-01

    We find all finite Ockham algebras that admit only finitely many compatible relations (modulo a natural equivalence). Up to isomorphism and symmetry, these Ockham algebras form two countably infinite families: one family consists of the quasi-primal Ockham algebras, and the other family is a sequence of generalised Stone algebras.

  14. India-U.S. Relations

    National Research Council Canada - National Science Library

    Kronstadt, K. A

    2006-01-01

    The end of the Cold War freed India-U.S. relations from the constraints of global bipolarity, but interactions continued for a decade to be affected by the burden of history, most notably the longstanding India-Pakistan rivalry and nuclear...

  15. Job-Related Maternity Benefits.

    Science.gov (United States)

    Citizens Advisory Council on the Status of Women, Washington, DC.

    The Citizens' Advisory Council on the Status of Women in October 1970 adopted a statement of principles that views childbirth and complications of pregnancy, for all job-related purposes, as temporary disabilities that should be treated as such under any health insurance, temporary disability insurance, or sick leave plan of an employer, union, or…

  16. Hybrid Tourism-Related Structures

    DEFF Research Database (Denmark)

    Pasgaard, Jens Christian

    2014-01-01

    This article is rooted in theories presented in the PhD dissertation Tourism and Strategic Planning (Pasgaard 2012) and features a number of much discussed concepts related to the complicated phenomenon of tourism and to the discipline of strategic urban planning. It is beyond the scope of this a...

  17. Wild Vietnamese relatives of blueberries

    Science.gov (United States)

    rom 25 October to 14 November 2015, wild relatives of cultivated blueberry, Vaccinium corymbosum, were collected during a Vietnamese-US cooperative expedition in Northern Vietnam. The exploration involved representatives of the Plant Resources Center, Vietnam Academy of Agricultural Sciences, in Han...

  18. Age-Related Macular Degeneration.

    Science.gov (United States)

    Mehta, Sonia

    2015-09-01

    Age-related macular degeneration (AMD) is the leading cause of vision loss in the elderly. AMD is diagnosed based on characteristic retinal findings in individuals older than 50. Early detection and treatment are critical in increasing the likelihood of retaining good and functional vision. Copyright © 2015 Elsevier Inc. All rights reserved.

  19. Verifying the Theory of Relativity

    Science.gov (United States)

    Chandrasekhar, S.

    1975-01-01

    This article, based on a talk the author gave to the 'Innominates', an interdisciplinary faculty group at the University of Chicago, focuses on events of the years surrounding the British Expeditions to Brazil and West Africa in 1919 that led to the confirmation of Einstein's theory of relativity. (BT)

  20. Work-related voice disorder

    Directory of Open Access Journals (Sweden)

    Paulo Eduardo Przysiezny

    2015-04-01

    Full Text Available INTRODUCTION: Dysphonia is the main symptom of the disorders of oral communication. However, voice disorders also present with other symptoms such as difficulty in maintaining the voice (asthenia, vocal fatigue, variation in habitual vocal fundamental frequency, hoarseness, lack of vocal volume and projection, loss of vocal efficiency, and weakness when speaking. There are several proposals for the etiologic classification of dysphonia: functional, organofunctional, organic, and work-related voice disorder (WRVD.OBJECTIVE: To conduct a literature review on WRVD and on the current Brazilian labor legislation.METHODS: This was a review article with bibliographical research conducted on the PubMed and Bireme databases, using the terms "work-related voice disorder", "occupational dysphonia", "dysphonia and labor legislation", and a review of labor and social security relevant laws.CONCLUSION: WRVD is a situation that frequently is listed as a reason for work absenteeism, functional rehabilitation, or for prolonged absence from work. Currently, forensic physicians have no comparative parameters to help with the analysis of vocal disorders. In certain situations WRVD may cause, work disability. This disorder may be labor-related, or be an adjuvant factor to work-related diseases.