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Sample records for del corral sierras

  1. Formación de megacristales de feldespato potásico en el sector sur del batolito Cerro Aspero-Alpa Corral (32°40'S y 64°50'W, Sierras Pampeanas, Córdoba, Argentina

    Directory of Open Access Journals (Sweden)

    Pinotti, L. P.

    1992-12-01

    sido interpretados como un sistema convectivo dentro del plutón.La presencia de una marcada fábrica planar en los megacristales de microclina, conjuntamente con fenómenos de gradaciones en el tamaño de cristales, sineusis, alineaciones en los bordes de enclaves y aglomeraciones de cristales evidencian su origen temprano magmático. Los enclaves muestran una cinemática de deformación producida por cizalla simple.

  2. Flora cactológica y especies asociadas en el área natural protegida Sierra Corral de los Bandidos, Nuevo León, México Cactus list and asociated plants of the protected natural area Sierra Corral de Los Bandidos, Nuevo Leon, Mexico

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    María del Pilar Carmona-Lara

    2008-12-01

    Full Text Available El área natural protegida (ANP Sierra Corral de los Bandidos ubicada en la sierra Madre Oriental, al noroeste de Monterrey, sufre el impacto de actividades antropológicas asociadas al matorral submontano (ganadería, agricultura, colecta y urbanismo, disminuyendo sus recursos naturales y amenazando sus especies endémicas, principalmente cactáceas. El propósito del estudio fue conocer la diversidad de cactáceas y especies asociadas en zonas de amortiguamiento y núcleo. Para ello se determinaron índices de riqueza y similitud utilizando un muestreo estratificado con cuadrantes a lo largo de transectos orientados por gradientes altitudinales según su zonificación. En total se registraron 112 taxa (30 cactáceas, 87 (24 cactáceas en zona de amortiguamiento y 80 (19 cactáceas en zona núcleo. Por su densidad, frecuencia y abundancia sobresalieron Echinocereus stramineus (Engelm. Engelm. ex F. Seitz, Cylindropuntia leptocaulis F. M. Knuth in Backeb et F. M. Knuth, Mammillaria melanocentra Poselg., Neolloydia conoidea (DC Britton et Rose, (Cactaceae; Erioneuron avenaceum (H. B et K. Tateoka, (Poaceae; Viguiera stenoloba S. F. Blake; Zexmenia hispida (Kunth A. Gray, (Asteraceae y Agave lechuguilla Torr, (Agavaceae. Existe diferencia significativa entre las poblaciones de cactus de las zonas del ANP, según Jacquard (13%, Sörensen (38% y Morisita (0.44. Ocho cactáceas (7 endémicas están registradas en algún estatus de la NOM-ECOL-059, 2001.The Sierra Corral de los Bandidos is a natural protected area located in the Sierra Madre Oriental mountain range northwest of Monterrey city. This preserve suffers the impact of human activities in the form of cattle ranching, agriculture, harvest of wild plants, and urbanism, diminishing its natural resources and threatening its endemic species, especially from the cactaceae family. The purpose of this study was to obtain information on the diversity of cacti and associated species in the buffer and

  3. El Osario del Barrio Corrales del Pucará de Tilcara

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    Adaro, Verónica Y.

    2003-01-01

    Full Text Available El Osario del Barrio Corrales, una estructura funeraria positiva del Pucará de Tilcara, contenía un conjunto entremezclado de piezas óseas humanas. Las características de este hallazgo permitieron considerar pautas culturales que llevaron a la generación de la estructura funeraria, y su vinculación respecto de los eventos de habitación y subsecuente abandono, en un contexto de activa dinámica ocupacional del Pucará, caracterizada por eventos de utilización y reutilización de los espacios, en función de la densidad poblacional. Los materiales fueron sometidos a tratamientos estandarizados de recuperación, consolidación y preservación. Mediante la cuantificación y el estudio anatómico de los hallazgos se obtienen estimadores del tamaño muestral, se consideran aspectos anátomo funcionales y patológicos, y se presenta un perfil demográfico hipotético. Los resultados permiten establecer la presencia de once individuos adultos y trece individuos inmaduros Se identificaron el sexo y las edades de muerte de adultos y subadultos. Se detectó la presencia de indicadores de estrés periódico no específico, patologías funcionales y la presencia de enfermedades infecciosas. Se concluye que el hallazgo posee características estructurales y mortuorias no registradas hasta el momento para el área. Su génesis puede estar probablemente vinculada a los eventos de reutilización mencionados. Desde el punto de vista demográfico, nuestras observaciones se ajustan a aquellos perfiles observados en poblaciones prehistóricas, caracterizadas por altas tasas de mortalidad infantil.

  4. Actions for the environmental adequateness and emissions control at the Martin del Corral power plant-Termozipa; Obras de adecuacion ambiental y control de emisiones para la central termoelectrica Martin del Corral - Termozipa

    Energy Technology Data Exchange (ETDEWEB)

    Arevalo Osorio, Luis [Empresa de Energia de Bogota, Bogota (Colombia)

    1996-12-31

    In this paper the general data on the Martin del Corral-Termozipa, of Colombia, fossil fueled power plant are exposed. The results of a study to determine the environmental impact originated in the influence zone of this Power Plant are presented, particularly on the Bogota River. The study was framed into the environmental policy driven by the Colombian sector. Different solutions addressed to the optimization of the handling, capacity and control of the emissions and counteract the pollution possibilities of the Bogota River are described [Espanol] En esta ponencia se exponen datos generales de la central termoelectrica Martin del Corral - Termozipa-, de Colombia. Se presentan los resultados de un estudio para determinar el impacto ambiental ocasionado en la zona de influencia de esta central, y en particular sobre el rio Bogota. El estudio se enmarco dentro de la politica ambiental impulsada por el sector colombiano. Se describen diversas soluciones encaminadas a optimizar el manejo, capacidad y control de las emisiones y contrarrestar las posibilidades de contaminacion del rio Bogota

  5. Actions for the environmental adequateness and emissions control at the Martin del Corral power plant-Termozipa; Obras de adecuacion ambiental y control de emisiones para la central termoelectrica Martin del Corral - Termozipa

    Energy Technology Data Exchange (ETDEWEB)

    Arevalo Osorio, Luis [Empresa de Energia de Bogota, Bogota (Colombia)

    1997-12-31

    In this paper the general data on the Martin del Corral-Termozipa, of Colombia, fossil fueled power plant are exposed. The results of a study to determine the environmental impact originated in the influence zone of this Power Plant are presented, particularly on the Bogota River. The study was framed into the environmental policy driven by the Colombian sector. Different solutions addressed to the optimization of the handling, capacity and control of the emissions and counteract the pollution possibilities of the Bogota River are described [Espanol] En esta ponencia se exponen datos generales de la central termoelectrica Martin del Corral - Termozipa-, de Colombia. Se presentan los resultados de un estudio para determinar el impacto ambiental ocasionado en la zona de influencia de esta central, y en particular sobre el rio Bogota. El estudio se enmarco dentro de la politica ambiental impulsada por el sector colombiano. Se describen diversas soluciones encaminadas a optimizar el manejo, capacidad y control de las emisiones y contrarrestar las posibilidades de contaminacion del rio Bogota

  6. Prevalencia y factores asociados a ruptura prematura de membranas en gestantes del Hospital Vicente Corral Moscoso, Cuenca-Ecuador, noviembre 2011-noviembre 2012

    OpenAIRE

    Cuenca Condoy, Elsa María

    2013-01-01

    Objetivo: Determinar la prevalencia de ruptura prematura de membranas y factores asociados en gestantes del Hospital Vicente Corral Moscoso. Cuenca-Ecuador, durante el periodo enero a julio 2012. -Método y técnicas: Estudio transversal de prevalencia, en 657 gestantes que acudieron al Hospital Vicente Corral Moscoso. - Hipótesis: La Ruptura prematura de membranas es más frecuente cuando se asocian factores como antecedente de infección del tracto urinario, bacteriuria, amenaza de parto pretér...

  7. Características de las infecciones nosocomiales en el servicio de cuidados intensivos pediátricos del Hospital Vicente Corral Moscoso, Cuenca 2014 -2015

    OpenAIRE

    Salcedo González, Rosa Karina

    2016-01-01

    Objetivo: Determinar las características de las infecciones nosocomiales en el servicio de Cuidados Intensivos Pediátricos del Hospital Vicente Corral Moscoso durante el año 2014 al 2015. Materiales y métodos: estudio descriptivo llevado a cabo en 32 pacientes diagnosticados de infección nosocomial en la Unidad de Cuidados Intensivos Pediátricos del Hospital Vicente Corral Moscoso; los datos fueron recogidos en un formulario; se tabularon en el programa SPSS versión 15 y para el análisis ...

  8. Manejo del trauma de tórax y características demográficas, hospital Vicente Corral Moscoso. Cuenca – Ecuador.

    OpenAIRE

    Guachún Guachún, Mayra Alejandra; Aguirre Vintimilla, Marcos Andrés; Lituma Yascaribay, Sara Cumandá; Tapia Gudiño, Johnny Amilcar

    2016-01-01

    Objetivo: Analizar el manejo del trauma de tórax en el Hospital Vicente Corral Moscoso y describir las características demográficas de la población estudiada. Método: Estudio descriptivo retrospectivo, la muestra fue de 167 pacientes atendidos en el servicio de Emergencia del Hospital Vicente Corral Moscoso, con diagnóstico de trauma de tórax, durante el periodo enero de 2013 a junio de 2015; los datos se obtuvieron de las historias clínicas. Se analizaron las variables de datos demográ...

  9. Corrales de piedra-pirkas- un patrimonio cultural del paisaje rural de Chile central

    OpenAIRE

    Tomic Jakas, Tonci Stipe

    2016-01-01

    Quisiéramos partir con este soliloquio, quizás el más famoso del drama español; ocurre al final del primer acto, cuando Segismundo piensa en la vida y en su suerte. No es el fatalismo lo que interesa si no que desde el inicio explicitar que se trata de una reflexión que lleva a configurar un visión –algo que anida en la mente-- que su fin central radica es tratar de poner en valor sobre la base de la importancia histórica, cultural y patrimonial de los muros de piedra o pirkas; en particular ...

  10. Limpieza de la sala para ordeño y corrales de espera en lecherías, con uso racional del agua

    OpenAIRE

    Paniagua Madrigal, Wilfrido

    2006-01-01

    La limpieza de las salas de ordeño y corrales en los sistemas de producción de leche, tradicionalmente se han caracterizado por las grandes cantidades de agua que se utilizan. Este trabajo pretende demostrar que se puede producir leche haciendo un uso racional del recurso agua sin que ello signifique la presencia de malos olores, incidencia de mosca doméstica y pérdida de la calidad sanitaria de la leche. Los datos que se presentan en el artículo, son parte de los resultados logrados en el pr...

  11. Origen y decadencia del gamonalismo en la sierra ecuatoriana

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    Ibarra Crespo, Hernán

    2002-12-01

    Full Text Available This article analyzes the historical path of gamonalismo in Ecuadorian highlands. Although it could be alike to Mexican caciquismo and Brazilian coronelismo, gamonalismo had its specific forms. In Ecuador it is possible to reconstruct its meaning in political terms, as a form of traditional domination. The use of this particular term is analyzed in different historical moments between the 18th and 20th century; focusing on the origin and decline of this local power. The aim is to build an interpretative frame in order to understand agrarian sources of Ecuadorian state development and ethnic domination.

    Este artículo analiza la trayectoria histórica del gamonalismo en la sierra ecuatoriana. Aunque homologado con el caciquismo mexicano y el coronelismo brasileño, tiene rasgos específicos. En el Ecuador es posible reconstruir el significado del gamonalismo en el lenguaje político y como modalidad de dominación tradicional. Por una parte, se realiza un rastreo y análisis del uso del término en distintos momentos históricos entre los siglos XVIII y XX. Por otra parte, se efectúa un abordaje del origen y declinación de esta forma de poder. Se aspira a construir un marco interpretativo que aporte a la comprensión de los fundamentos agrarios de la constitución del Estado ecuatoriano y las formas de dominación étnica.

  12. Limpieza de la sala para ordeño y corrales de espera en lecherías, con uso racional del agua

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    Wilfrido Paniagua Madrigal

    2006-05-01

    Full Text Available La limpieza de las salas de ordeño y corrales en los sistemas de producción de leche, tradicionalmente se han caracterizado por las grandes cantidades de agua que se utilizan. Este trabajo pretende demostrar que se puede producir leche haciendo un uso racional del recurso agua sin que ello signifique la presencia de malos olores, incidencia de mosca doméstica y pérdida de la calidad sanitaria de la leche. Los datos que se presentan en el artículo, son parte de los resultados logrados en el proyecto “Manejo alternativo de lecherías integrados a sistemas agropecuarios de bajos insumos externos”, el cual se realizó en la Región Huetar Norte, en cinco fincas de productores de leche. Pretende de alguna manera contribuir con el desarrollo sostenible de los sistemas de producción de leche, al ofrecer alternativas que permitan cambiar los modelos de limpieza tradicionales por modelos que implementen sistemas de limpieza con usomás racional del agua.

  13. Geological and geophysical investigations at Sierra del Medio massif - Argentine

    International Nuclear Information System (INIS)

    Perucca, J.C.; Llambias, E.; Puigdomenech, H.H.; Cebrelli, E.; Castro, C.E.; Grassi, I.; Salinas, L.I.

    1987-01-01

    Geological investigations were performed at Sierra del Medio (Chubut Province), a mountainous massif of about 25 km by 8 km of migmatic origin, which emerges from a depressed tectonic trench or graben called Pampa de Gastre. The most ancient rocks belong to biotitic and anphibolic schist that passed almost entirely to tonalitoid migmatites with a second process producing granitic rocks. Boreholes were drilled on the basis of conclusions from Landsat satellites imagery and aerial photographic sets, folowed by field work on geological, petrographic, geophysical and hydrogeological features at surface, structural interpretation supported by geostatistical computations. Two sets of boreholes were drilled to investigate subsurface rock behaviour al 300 m depth and 800 m depth respectively, beginning at peripheral places and ending at the central part or selected site. Basic purposes of boreholes were to define structural and petrographic features of the rock massif by a good comprehension of master joints and faulting distribution with its belts of alteration mylonitization or brecciation, mechanical properties of samples, chemical composition and varitions, petrographic facies and mineralogy. Boreholes provided data to investigate joints, faults and dikes as general discontinuities for hydraulic research like permeability or effective hydraulic conductivity, and their geostatistical modelling. Boreholes are also being prepared for geophysical logging from which logthermal ones have already been completed. (Author) [es

  14. Ethnobotany of the Sierra Nevada del Cocuy-Güicán

    NARCIS (Netherlands)

    Rodríguez, Mireia Alcántara; Angueyra, Andrea; Cleef, Antoine M.; Andel, van Tinde

    2018-01-01

    Background: The Sierra Nevada del Cocuy-Güicán in the Colombian Andes is protected as a National Natural Park since 1977 because of its fragile páramo ecosystems, extraordinary biodiversity, high plant endemism, and function as water reservoir. The vegetation on this mountain is threatened by

  15. Ecología de la fauna silvestre de la sierra nevada y la Sierra del Ajusco

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    D. Granados Sánchez

    2004-01-01

    Full Text Available Se presenta un estudio sobre la fauna silvestre de la Sierra del Ajusco y la Sierra Nevada, localizadas dentro de la Faja Volcánica Transmexicana (FVT, en la porción oriental del límite meridional de la Cuenca de México. La enorme riqueza biológica de esta zona que rodea la zona metropolitana de la ciudad de México, uno de los mayores complejos urbanos del mundo, ha sobrevivido durante décadas al impacto de la urbanización de las áreas forestales, explotación de recursos naturales, contaminación, cacería, incendios y pastoreo. A pesar de esto, se desconocen muchos de los factores que regulan la dinámica de los ecosistemas en esta región. Con relación a la fauna silvestre la carencia de información es mucho más evidente, aspectos elementales como la diversidad de especies, las interacciones ecológicas, la función de los organismos en el ecosistema, las condiciones de estrés a que están sometidos, han sido poco explorados. En esta investigación se recurrió a observaciones de campo y a la consulta de diferentes fuentes bibliográficas para estimar la riqueza de especies de mamíferos, aves, reptiles y anfibios; las relaciones ecológicas entre los mismos y las consecuencias de la modificación de su hábitat producto de las actividades humanas.

  16. Espacio urbano, espacio del consumo en las crónicas norteamericanas de Justo Sierra

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    Cristina Beatriz Fernández

    2011-01-01

    Full Text Available El objetivo de este trabajo es analizar las crónicas de viaje de Justo Sierra, escritas en ocasión de su visita a los Estados Unidos a finales del siglo XIX, con énfasis en las dedicadas a la ciudad de Nueva York. En ellas, centramos nuestra atención en el registro textual de fenómenos relacionados con la forma en que Sierra percibe la modernidad norteamericana, especialmente significativa en lo que hace a la relación entre economía y sociedad. Por ello, atendemos particularmente la configuración del espacio urbano como un escenario del consumo, y procuramos demostrar cómo la constitución física y simbólica de las ciudades muestra rasgos de parentesco con esos eventos típicos de la época que fueron las ferias y exposiciones, las cuales también son objeto de la prosa de Sierra.

  17. Patrones biogeográficos de la avifauna de la Sierra Madre del Sur Biogeographic patterns of the avifauna of the Sierra Madre del Sur

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    Epifanio Blancas-Calva

    2010-08-01

    Full Text Available Analizamos la avifauna de 26 subcuencas de la provincia biótica de la Sierra Madre del Sur y sus relaciones biogeográficas utilizando el análisis de parsimonia de endemismos (PAE. A partir de información distributional de las especies obtenida de la base de datos del Atlas de las aves de México y de la literatura disponible, construimos una matriz de datos para 26 subcuencas y 437 especies. Se obtuvo un cladograma que sugiere la existencia de 3 grupos de subcuencas: el primero agrupa subcuencas de climas áridos, ubicadas geográficamente de norte a sureste en el estado de Oaxaca; el segundo, otras subcuencas de ambientes climáticos subhúmedos, y el tercero, las restantes subcuencas de ambientes climáticos húmedos de mayor complejidad ambiental.We analyzed the avifauna of 26 sub-basins of the Sierra Madre del Sur biotic province and their biogeographical relationships applying a parsimony analysis of endemicity (PAE. Based on the distributional information of the species obtained from the Atlas de las aves de México and published literature, we built a data matrix for 26 sub-basins and 437 species. The single cladogram obtained suggests the existence of three groups of sub-basins:the first with 5 sub-basins from arid environments, geographically located in north-southeastern Oaxaca; the second with another 5 sub-basins form subhumid environments; and the third one with the remaining sub-basins, from humid and environmentally more complex habitats.

  18. Sierras del Tandil. First Meeting of Morpfological Sciences.

    OpenAIRE

    Deserti, Maria Irene; Zamponi, Mauricio Oscar; Escalante, Alicia Haydee

    2015-01-01

    Las hidras son los cnidarios dulceacuícolas por excelencia y el ejemplo clásico de la forma pólipo dentro de dicho phylum. Sin embargo existe aún una gran confusión en lo que concierne a la taxonomía del género, ya que muchas especies presentan variaciones morfológicas que dificultan su identificación.Las hidras del hemisferio sur han sido poco investigadas, por lo que no se conoce con certeza cuales son las especies presentes y si éstas pertenecen a los grupos taxonómicos existentes hasta el...

  19. Cacao 3 (Cc 3, Arte rupestre del formativo temprano en Antofagasta de la Sierra, Catamarca, Argentina

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    Alvaro Rodrigo Martel

    2004-01-01

    Full Text Available En el presente trabajo hemos abordado el estudio de la producción del arte rupestre del sitio Cacao 3 –Cc3- (Antofagasta de la Sierra, Catamarca con relación a las prácticas socioculturales de grupos agropastoriles del periodo Formativo Temprano en la Puna meridional argentina, haciendo hincapié en el emplazamiento del sitio y su asociación contextual con las demás evidencias arqueológicas conocidas para el área de estudio y estableciendo las relaciones entre las manifestaciones rupestres de Cc3 con las de otros sitios, a nivel micro y macrorregional, a través de indicadores estilísticos

  20. Caracterización petrográfica y geoquímica del batolito Cerro Aspero-Alpa Corral (32°34'-32°42' LS y 64°43'-64°52' LO, provincia de Córdoba, Argentina

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    Porta, G.

    1992-12-01

    Full Text Available The Cerro Aspero-Alpa Corral (CA-AC batholith is a 440 km2 granite body present in the Southern edge of the Eastern Pampean Ranges, Córdoba province, central Argentina. The intrusive body of probably paleozoic age shows both post-tectonic and epizonal character. Country rocks include Upper Precambrian-Lower Paleozoic metasedimentary rocks mainly represented by mica-schists, gneisses and migmatites, locally interrupted by minor amphibolite and marble outcrops.This paper deals with representative petrographic and geochemical data that characterize a 150 km2 central stripe between 32°34'-32°42'S and 64°43'-64°52'W.Three granitic facies have been distinguished based on their distinctive modal mineralogy and texture, and upon well known chemical parameters.A K-feldspar megacryst porphydic-type is the areally prevalent facies, but dykes of micro- leucogranites and biotite-phenocryst bearing granite are also well represented. They are all monzogranites of subalkaline and peraluminous chemistry. Their mineralogy shows variable proportions of QAP constituents and micas, with minor phases represented by Fe-Ti oxides, apatite (Ap, titanite (Tt, allanite (Aln.Microgranular enclaves, abundantly distributed in the porphydic facies, provide valuable information for a better understanding of parental magma evolution.The high-Ca content of the melt makes this body quite distinctive compared to its larger northern neighbour, the Achala batholith.Pegmatite and aplite bodies, as well as fluorite bearing breccias and quartz veins, barren or mineralized, are also present within the CA-AC batholith.El batolito Cerro Aspero-Alpa Corral (CA-AC es un cuerpo granítico que aflora en el extremo sur de las Sierras Pampeanas Orientales, en la provincia de Córdoba, República Argentina, cubriendo una superficie cercana a los 440 km2.Es un cuerpo intrusivo postcinemático de probable edad paleozoica. Las rocas encajantes son metamorfitas correspondientes al Prec

  1. Photo series for quantifying forest fuels in Mexico: montane subtropical forests of the Sierra Madre del Sur and temperate forests and montane shrubland of the northern Sierra Madre Oriental

    Science.gov (United States)

    Jorge E. Morfin-Rios; Ernesto Alvarado-Celestino; Enrique J. Jardel-Pelaez; Robert E. Vihnanek; David K. Wright; Jose M. Michel-Fuentes; Clinton S. Wright; Roger D. Ottmar; David V. Sandberg; Andres Najera-Diaz

    2008-01-01

    Single wide-angle and stereo photographs display a range of forest ecosystems conditions and fuel loadings in montane subtropical forests of the Sierra Madre del Sur and temperate forests and montane shrubland of the northern Sierra Madre Oriental of Mexico. Each group of photographs includes inventory information summarizing overstory vegetation composition and...

  2. Virtualidad e hipertexto constructivo en dos visiones literarias del Museo del Prado: Manuel Mujica Lainez y Javier Sierra

    Directory of Open Access Journals (Sweden)

    Lourdes C. Sifontes Greco

    2015-12-01

    Full Text Available Las obras Un novelista en el Museo del Prado, de M. Mujica Lainez, y El Maestro del Prado, de J. Sierra, constituyen dos miradas sobre un mismo espacio museístico y patrimonial que establecen recorridos inmersivos e interactivos susceptibles de ser considerados propuestas verbales de multimedialidad e hipertextualidad, cuya lectura construye un corpus virtual en diálogo con otros objetos culturales, como el discurso histórico, las guías de museo, otros textos impresos, las páginas web y las aplicaciones móviles que amplían, cuestionan y enriquecen el acercamiento a la obra de arte ofrecido por el museo. The works Un novelista en el Museo del Prado, by Manuel Mujica Lainez, and El Maestro del Prado, by Javier Sierra build two perspectives about the same heritage space tracing immersive and interactive museum “tours” that can be considered multimediatic and hypertextual literary proposals. Both texts converge in a virtual corpus that establishes a dialogue with other cultural objects, such as historical discourse, museum guides, other printed texts, websites and mobile apps that make possible an approach to the works of art that expands, puts into question and enriches the one offered by the museum.

  3. Automatización del proceso de curvado de flejes de acero para el conformado de sierras de corona

    OpenAIRE

    Guerrero González, Edgar

    2004-01-01

    El documento que se presenta a continuación es la Memoria del Proyecto de Final de Carrera titulado “Automatización del curvado de flejes de acero para el conformado de sierras de corona”. Proyecto solicitado por la empresa SAEGEN IBERICA, dedicada a la fabricación de coronas de sierra entre otros productos, y motivada por la incapacidad de su sistema productivo y de los procesos existentes, de alcanzar la calidad y la producción exigidas por el mercado. El proyecto queda enmarcado d...

  4. Does HDR Pre-Processing Improve the Accuracy of 3D Models Obtained by Means of two Conventional SfM-MVS Software Packages? The Case of the Corral del Veleta Rock Glacier

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    Álvaro Gómez-Gutiérrez

    2015-08-01

    Full Text Available The accuracy of different workflows using Structure-from-Motion and Multi-View-Stereo techniques (SfM-MVS is tested. Twelve point clouds of the Corral del Veleta rock glacier, in Spain, were produced with two different software packages (123D Catch and Agisoft Photoscan, using Low Dynamic Range images and High Dynamic Range compositions (HDR for three different years (2011, 2012 and 2014. The accuracy of the resulting point clouds was assessed using benchmark models acquired every year with a Terrestrial Laser Scanner. Three parameters were used to estimate the accuracy of each point cloud: the RMSE, the Cloud-to-Cloud distance (C2C and the Multiscale-Model-to-Model comparison (M3C2. The M3C2 mean error ranged from 0.084 m (standard deviation of 0.403 m to 1.451 m (standard deviation of 1.625 m. Agisoft Photoscan overcome 123D Catch, producing more accurate and denser point clouds in 11 out 12 cases, being this work, the first available comparison between both software packages in the literature. No significant improvement was observed using HDR pre-processing. To our knowledge, this is the first time that the geometrical accuracy of 3D models obtained using LDR and HDR compositions are compared. These findings may be of interest for researchers who wish to estimate geomorphic changes using SfM-MVS approaches.

  5. Contaminación bacteriana y resistencia antibiótica en celulares de médicos del Hospital Vicente Corral Moscoso. Cuenca-2012

    OpenAIRE

    Delgado Cobos, Soledad Leydi; Galarza Brito, Juan Eli; Heras Gárate, Marco Antonio

    2012-01-01

    Antecedentes: El uso de artículos electrónicos como teléfonos móviles dentro de las unidades de salud, especialmente en hospitales, es muy común. Estos se han difundido sin ninguna restricción ni precaución para desinfectarlos, siendo su uso cada vez más frecuente. Es posible que estos artículos constituyan una fuente de contaminación para infecciones intrahospitalarias. Estudios realizados evidencian contaminaciones bacterianas superiores al 90% en celulares del personal médico, encontrándos...

  6. "2por km2" chozos, estructuras y corrales de piedra en seco en la superficie del término de Tebar, Cuenca

    OpenAIRE

    Ruiz Checa, José Ramón; Cristini, Valentina

    2011-01-01

    [ES] Tanto en la península Ibérica (Maestrazgo... Islas Baleares...), como en Europa (Provenza... Liguria...) aparecen «paisajes construidos» con piedra en seco. Se trata realmente de parajes antropizados prácticamente en toda su totalidad, resultado de un afán milenario de domesticación del territorio, a través de estructuras hidráulicas, pistas, cañadas...caminos, bancales, construcciones o recintos. El caso de Tébar, un municipio a 94 km al sur oeste de Cuenca, e...

  7. TRADITIONAL USE OF A PROTECTED SPECIES (Litsea glaucescens Kunth IN THE “SIERRA DEL LAUREL

    Directory of Open Access Journals (Sweden)

    Salvador Martín Medina-Torres

    2011-05-01

    Full Text Available Whenever a natural area is proposed to be a protected area, the information that supports the proposal is usually based on the physical environmental, rather than on the social environment and on the management of natural resource. This study was conducted from May 2004 to June 2005 whit the objective to analyze the process of exploitation of Mexican Bay Leaf (Litsea glaucescens Kunth in rural communities of Sierra del Laurel, a priority area in the state of Aguascalientes, México. Thirteen semi-structured interview were applied for local collectors and seven more were applied to inhabitants of the region to understand the trends in the use of resource. Three interviews were also applied to environmental officials from federal and local institutions to know about their position regarding the use of the Mexican Bay Leaf. A participative workshop with producers and collectors was conducted to document their opinion on the status of the population of this specie. Trend in utilization of the Mexican Bay Leaf have led it to be in danger of extinction: there is not organization nor legal utilization schemes among collectors that allow regeneration; the lack of institutional coordination, along whit inefficient implementation of laws and other legal instruments to regulate the management of natural resources, has contributed so that users have not adequate risk management procedures.

  8. Elementos de la praxis y del corpus del conocimiento etnoecológico tseltal en comunidades de la Sierra Norte de Chiapas

    Directory of Open Access Journals (Sweden)

    José Ramón Rodríguez Moreno

    2014-01-01

    Full Text Available Las estrategias de uso y manejo de los ecosistemas como las que practican los tseltales en la Sierra Norte de Chiapas han sido insistentemente descritas por una visión occidental “científica” como sistemas de baja productividad y derrochadoras de recursos naturales. En este estudio se reseñan algunos aspectos del cosmos, corpus y praxis del conocimiento que se posee en comunidades tseltales, a partir del hilo conductor de un rubro específico del campo mexicano, el maíz, y de otras manifestaciones del conocimiento local, que permiten desmontar la marginación del sistema de conocimiento local con que lo ha revestido la visión occidental.

  9. La fauna del pleistoceno inferior de la Sierra de Quibas (Abanilla, Murcia

    Directory of Open Access Journals (Sweden)

    Szyndlar, Z.

    1999-08-01

    Full Text Available The Quaternary karstic site of Sierra de Quibas (Abanilla, Murcia, Spain has provided a wide faunistic list with 53 species distributed among gastropods, myriapods, amphibians, reptiles, birds and mammals. Especially interesting among the gastropods is Palaeoglandina that became extinct in Europe during the Pliocene. It remains as a relict genus in the Pleistocene of the Iberian Peninsula. Two of the birds, Gypaetus barbatus and Geronticus eremita, and a snake, Elaphe cf. E. sealaris, are scarcely represented in the fossil record. For several birds, it is the first record in the Lower Pleistocene of the Iberian Peninsula. Among the mammals, the presence of the Cercopithecine Macaca sylvanus is especially relevant one. The assemblage of the taxa Arvicola deucalion, Castillomys rivas rivas, Eliomys intermedius, Equus altidens and Capra sp. aff. C. alba allows the correlation with Plines 1, Orce 3 and Venta Micena, among other sites. Therefore Quibas can be dated before the end of Lower Pleistocene, between 1.3 and 1 Ma. A dry paleoclimatic regime, very similar to the current climate in the geographical area, though perhaps slightly wetter and warmer, can be inferred from the faunistic assemblage. The environment of the karstic cavity was a rocky place with open brushwood areas, but in the proximities there were wetlands and woodlands, as can be inferred from the presence of birds and micromammals characteristic of these habitats.El yacimiento kárstico cuaternario de la Sierra de Quibas (Abanilla, Murcia ha proporcionado una amplia lista faunística constituida por 53 especies repartidas entre gasterópodos, miriápodos, anfibios, reptiles, aves y mamíferos. En el conjunto de los gasterópodos destaca Palaeoglandina, un género que se extingue en el resto de Europa durante el Plioceno y que se mantiene como relicto en el Pleistoceno de la Península Ibérica. Dos de las especies de aves determinadas, Gypaetus barbatus y Gerontieus eremita, y una

  10. Germinación y dormancia de arbustos y trepadoras del bosque siempreverde de la Sierra del Rosario, Cuba

    Directory of Open Access Journals (Sweden)

    J. A Sánchez

    Full Text Available Se determinaron los requerimientos germinativos y las clases de dormancia seminal en 14 especies de arbustos y 16 trepadoras (13 enredaderas y tres lianas, del bosque siempreverde estacional tropical de la Reserva de la Biosfera Sierra del Rosario, Cuba. También se evaluaron las relaciones entre las clases de dormancia y otros rasgos de historia de vida de las plantas. Los experimentos de germinación se realizaron en condiciones controladas de laboratorio (luz y temperatura: una temperatura constante de 25 ºC, tres condiciones de temperatura alterna (25/30 ºC, 25/35 ºC y 25/40 ºC y dos ambientes lumínicos (luz y oscuridad. En los arbustos, la luz fue el principal factor que reguló la germinación; mientras que en las trepadoras los factores experimentados no afectaron significativamente la germinación en su totalidad, aunque algunas tuvieron una respuesta especie-específica. Solo dos especies fueron totalmente fotoblásticas positivas, y la germinación a la luz disminuyó con la masa fresca de la semilla. La dormancia ocurrió en 23 especies (76,6 %, de ellas 10 eran arbustos y 13, trepadoras. En los arbustos la dormancia fisiológica fue la más abundante, y en las trepadoras predominaron la fisiológica y la física. Entre las trepadoras se hallaron las únicas especies con dormancia morfológica y/o morfofisiológica. El mayor número de semillas dormantes se encontró en la estación seca (87 %. El estudio confirmó la diversidad de mecanismos de dormancia y requerimientos germinativos ya reportados en estas formas de vida para el trópico.

  11. Corral Monitoring System assessment results

    International Nuclear Information System (INIS)

    Filby, E.E.; Haskel, K.J.

    1998-03-01

    This report describes the results of a functional and operational assessment of the Corral Monitoring Systems (CMS), which was designed to detect and document accountable items entering or leaving a monitored site. Its development was motivated by the possibility that multiple sites in the nuclear weapons states of the former Soviet Union might be opened to such monitoring under the provisions of the Strategic Arms Reduction Treaty. The assessment was performed at three levels. One level evaluated how well the planned approach addressed the target application, and which involved tracking sensitive items moving into and around a site being monitored as part of an international treaty or other agreement. The second level examined the overall design and development approach, while the third focused on individual subsystems within the total package. Unfortunately, the system was delivered as disassembled parts and pieces, with very poor documentation. Thus, the assessment was based on fragmentary operating data coupled with an analysis of what documents were provided with the system. The system design seemed to be a reasonable match to the requirements of the target application; however, important questions about site manning and top level administrative control were left unanswered. Four weaknesses in the overall design and development approach were detected: (1) poor configuration control and management, (2) inadequate adherence to a well defined architectural standard, (3) no apparent provision for improving top level error tolerance, and (4) weaknesses in the object oriented programming approach. The individual subsystems were found to offer few features or capabilities that were new or unique, even at the conceptual level. The CMS might possibly have offered a unique combination of features, but this level of integration was never realized, and it had no unique capabilities that could be readily extracted for use in another system

  12. Corral Monitoring System assessment results

    Energy Technology Data Exchange (ETDEWEB)

    Filby, E.E.; Haskel, K.J.

    1998-03-01

    This report describes the results of a functional and operational assessment of the Corral Monitoring Systems (CMS), which was designed to detect and document accountable items entering or leaving a monitored site. Its development was motivated by the possibility that multiple sites in the nuclear weapons states of the former Soviet Union might be opened to such monitoring under the provisions of the Strategic Arms Reduction Treaty. The assessment was performed at three levels. One level evaluated how well the planned approach addressed the target application, and which involved tracking sensitive items moving into and around a site being monitored as part of an international treaty or other agreement. The second level examined the overall design and development approach, while the third focused on individual subsystems within the total package. Unfortunately, the system was delivered as disassembled parts and pieces, with very poor documentation. Thus, the assessment was based on fragmentary operating data coupled with an analysis of what documents were provided with the system. The system design seemed to be a reasonable match to the requirements of the target application; however, important questions about site manning and top level administrative control were left unanswered. Four weaknesses in the overall design and development approach were detected: (1) poor configuration control and management, (2) inadequate adherence to a well defined architectural standard, (3) no apparent provision for improving top level error tolerance, and (4) weaknesses in the object oriented programming approach. The individual subsystems were found to offer few features or capabilities that were new or unique, even at the conceptual level. The CMS might possibly have offered a unique combination of features, but this level of integration was never realized, and it had no unique capabilities that could be readily extracted for use in another system.

  13. Factores que influyen en la diversidad de la dieta de las familias campesinas de las comunidades de San Clemente y Jesús del Gran Poder en la sierra norte del Ecuador.

    OpenAIRE

    Boada Molina, Laura Gabriela

    2015-01-01

    La presente investigación se basa en el estudio de la diversidad en la dieta de las familias campesinas de la Sierra Norte del Ecuador, específicamente en las comunidades de Jesús del Gran Poder en la Provincia del Carchi y de San Clemente en la Provincia de Imbabura.

  14. Pinturas del Corral de Morcilla (Las Batuecas

    Directory of Open Access Journals (Sweden)

    Julián BÉCARES PÉREZ

    2009-10-01

    Full Text Available Durante una de las frecuentes visitas que el Departamento de Prehistoria y Arqueología de Salamanca realiza a Las Batuecas tuvo lugar, en noviembre de 1973, el descubrimiento de un nuevo abrigo con pinturas por el Dr. Jordá, quien me brindó su publicación ayudándome en los trabajos de calco y estudio, por lo que le estoy muy agradecido.

  15. Compost de ave de corral como componente de sustratos

    Directory of Open Access Journals (Sweden)

    Lorena Alejandra Barbaro¹

    2011-07-01

    Full Text Available El sustrato para cultivo es un material que colocado en un contenedor permite el anclaje del sistema radicular, proporcionando agua y nutrientes. Entre los materiales empleados para formular sustratos se encuentran los compost. Entre ellos el compost de cama de ave de corral (CAC, elaborado en base al estiércol de aves mezclado con los materiales que forman su lecho. El objetivo de este trabajo fue evaluar dos compost de CAC como componente de sustrato, mediante el desarrollo de plantas de Coral (Salvia splendens. Uno de los compost contenía cama de stud (CAC+S durante su compostaje. Se formularon sustratos con diferentes proporciones de compost de CAC, compost de corteza de pino y pinocha, luego fueron analizados física y químicamente. A las plantas cultivadas en cada sustrato se midió la longitud y el diámetro del tallo, peso fresco y seco de la parte aérea y radicular. La densidad, porosidad y capacidad de retención de agua de todos los sustratos fueron aceptables. El pH de ambos compost de CAC fue mayor a 6,3, y los valores de las mezclas se encontraron dentro del rango aceptable. Todos los sustratos superaron 1 dS m-1 (1+5 v/v, principalmente los formulados con compost de CAC+S, cuyo material puro contenía altos niveles salinos. Al disminuir el porcentaje de CAC en las mezclas, diminuyó la concentración de cada nutriente. Las plantas cultivadas en el sustrato comercial y en las mezclas con 20% de CAC fueron las que lograron los mayores pesos aéreos y radiculares, diámetro y longitud del tallo. Por lo tanto, el compost de ave de corral podría ser una alternativa viable como componente de sustrato si se lo utiliza hasta un 20%.

  16. Nuevo yacimiento de flora Albense en la vertiente sur de la Sierra de Guadarrama. Soto del Real (Madrid

    Directory of Open Access Journals (Sweden)

    Diéguez, M. C.

    1986-10-01

    Full Text Available A new superior Albian - Cenomanian fossil flore locality are described for the first time on. the Sierra Guadarrama (Madrid. Between all the numerous specimens there found. stand out, due to their abundancy, the ones belonging to various species of Cycadales and Coniferals, accompanied by the Filicales, Lycopodiales and the Angiosperms Monocotiledonae and Dicotilodenae of the Policarpicales and Rosales orders. Two species of the Filicales orderGleichenites giesekianus (Heer Seward and Gleichenites nordenskiöldi (Heer Seward are registred for the first time in Spain, also vue of the Rosales order: Leguminosites infracretaceus Saporta. The essentials phytopaleontological and paleoecological characteristics are also indicated.

    Se describe, por primera vez en la Sierra de Guadarrama, un yacimiento de flora fósil del Albense superior-Cenomacense. Entre los numerosos restos vegetales en él hallados destacan por su abundancia los pertenecientes a especies de Cicadales y Coniferales, acompañados por representantes de las Filicales, Licopodiales y de Angiospermas Monocotiledóneas y Dicotiledóneas de los órdenes Policarpiales y Rosales. Se citan por primera vez en España dos especies e Filicales: Gleichenites giesekianus (Heer Seward y Gleichenites nordenskiöldi (Heer Seward y una del Orden Rosales: Leguminosites infracretaceus Saporta, y se indican las principales características fitopaleontológicas y paleocológicas del nuevo yacimiento.

  17. La potencialidad turística del patrimonio geológico-minero del Parque Natural Sierra de Aracena y Picos de Aroche (Huelva. España

    Directory of Open Access Journals (Sweden)

    Ramón Garrido Morillo

    2004-01-01

    Full Text Available La tendencia actual en la Unión Europea muestra la creciente puesta en valor de los espacios naturales protegidos como un elemento fundamental en los proyectos de desarrollo para el medio rural. Los Planes de Desarrollo Sostenible son ejemplos de estos elementos donde se trata de compaginar la conservación con el desarrollo de acuerdo con la tendencia actual de la Unión europea y la cumbre internacional de Río de Janeiro. El Parque Natural Sierra de Aracena y Picos de Aroche posee múltiples recursos turísticos, tanto naturales como culturales, estos últimos en todas sus modalidades: arqueológicos, arquitectónicos, etnológicos, geológicos, mineros, etc. El proceso orogénicos de sierra Morena ha dado lugar a formaciones geológicas de importante carácter turístico, siendo la más destacada la Gruta de las Maravillas en Aracena, punto de concentración de la mayor parte del turismo del Parque. Cabe destacar también algunos afloramientos como los de la Peña de Arias Montano, pero existen otros puntos que requieren de su puesta en valor con fines turísticos

  18. Conceptual characterization of the system of fractures of the rock mass known as Sierra del Medio (Chubut)

    International Nuclear Information System (INIS)

    Ventura, M.A.

    1990-01-01

    This work characterizes conceptually the system of fractures of the rock mass known as Sierra del Medio and its surroundings. The purpose of this characterization is to define the spectra of flow regimes which must be covered in computational models to be used in the prediction of the thermohydraulic effects of the eventual emplacement of a high-level radioactive waste repository. The analysis of the available data from previous studies was performed in order to determine qualitative data to be used in the stage of feasibility studied. The flow of water roughly N-S is defined by two systems of vertical, almost orthogonal fractures and surrounded by large faults. A set of hypotheses were considered which allow, supposing a given distribution of surface fractures, to establish the variations according to depth. The usual ways of obtaining the permeability and the hydraulic conductivity in fractured porous media are summarized in an appendix. (Author) [es

  19. Paleodemografía del hipodigma de fósiles de homininos del nivel TD6 de Gran Dolina (Sierra de Atapuerca, Burgos: estudio preliminar

    Directory of Open Access Journals (Sweden)

    Varela, S.

    2006-12-01

    Full Text Available The Aurora Stratum of the TD6 level of the Pleistocene site of Gran Dolina (Trinchera del Ferrocarril, Sierra de Atapuerca, Burgos, Spain have yielded more than one hundred human fossil remains, of the species Homo antecessor and belonging to a minimum (MNI of nine individuals. In this paper we made the MNI determination and the age at death of the individuals, using data observed in the mandibular, maxillary, and dental remains. The previous taphonomic analysis concluded that the origin of the hominin accumulation was due to a punctual or recurrent episode of «gastronomic» cannibalism. Our analysis revealed that most individuals (N = 7 are immature between three and thirteen, whereas two are young adults between fifteen and eighteen. Considering this peculiar mortality distribution, alternative hypotheses on the possible scenarios in which hominins were apprehended, as well as the implications for the human behaviour in the Pleistocene are discussed.En el Estrato Aurora del nivel TD6 del yacimiento pleistoceno de Gran Dolina (Trinchera del Ferrocarril, Sierra de Atapuerca, Burgos se han obtenido más de cien restos fósiles de homininos de la especie Homo antecessor, que pertenecen a un mínimo (NMI de nueve individuos. En este trabajo realizamos la determinación del NMI y de la edad de muerte de los individuos, empleando datos observados en los restos de mandíbula, maxilar y dientes. El análisis tafonómico previo concluyó que el origen de la acumulación de los restos de homininos fue un acto puntual o recurrente de canibalismo de tipo «gastronómico ». Nuestro análisis revela que la mayor parte de los individuos (n = 7 son inmaduros, de entre tres y trece años, mientras que dos son adultos jóvenes, de entre quince y dieciocho años. En función de esta peculiar distribución de mortalidad se discuten hipótesis alternativas sobre los escenarios en los que los homininos fueron aprehendidos y las implicaciones que ello

  20. Las mineralizaciones filonianas de fluorita (galena del Calar de San José (sierra de Baza, cordilleras Béticas

    Directory of Open Access Journals (Sweden)

    Torres-Ruiz, J.

    1984-08-01

    Full Text Available The F-(Pb, Zn, Ba district of Sierra de Baza are a (Southeastern Spain is mainly constituted by fluorite-(galene stratiform and stratabound mineralizations which are included in Carbonate levels of Ladinian-Carnian age. These levels also contain vein mineralizations but only in certain zones as de Calar de San José and the Calar de Santa Bárbara. This paper deals with the main structural and mineralogical characteristics of the vein mineralizations and their relations with the geological context evolution. Special attention is given to the tectonic and the spatial association with the stratiform and stratabound, mineralizations of sedimentary/diagenetic character. Two types of vein mineralizations may be distinguished : one type is represented by small "in situ" remobilizations, from the stratiform and stratabound mineralizat ioos, which have been formed during the final stages of alpine deformations; the other one has been formed before Alpina Orogeny and probably in direct relation with an intratriassic tectonic phase.

    El distrito de F-(Pb, Zn, Ba de la Sierra de Baza (al SE de España está constituido fundamentalmente por mineralizaciones estratiformes y estratoligadas de fluorita-(galena, enclavadas en niveles carbonatados del Ladiniense Superior-Carniense. En estos mismos niveles, en algunos sectores como los del Calar de San José y Calar de Santa Bárbara, que constituyen el área de mayor importancia de este distrito minero, dichas mineralizaciones coexisten con otras de tipo filoniano. La presente nota trata esencialmente de las principales características estructurales y mineralógicas de las mineralizaciones filonianas y de sus relaciones con la evolución del contexto geológico, muy especialmente en lo que se refiere a la tectónica y a su asociación espacial con las mineralizaciones estratiformes y estratoligadas de carácter sedimentario/diagenético. Se han diferenciado dos tipos de mineralizaciones filonianas: unas

  1. Early Pleistocene human hand phalanx from the Sima del Elefante (TE) cave site in Sierra de Atapuerca (Spain).

    Science.gov (United States)

    Lorenzo, Carlos; Pablos, Adrián; Carretero, José Miguel; Huguet, Rosa; Valverdú, Josep; Martinón-Torres, María; Arsuaga, Juan Luis; Carbonell, Eudald; Bermúdez de Castro, José María

    2015-01-01

    In this study, a new Early Pleistocene proximal hand phalanx (ATE9-2) from the Sima del Elefante cave site (TE - Sierra de Atapuerca, Spain), ascribed to Homo sp., is presented and comparatively described in the context of the evolution of the genus Homo. The ATE9-2 specimen is especially important because of the paucity of hand bones in the human fossil record during the Early Pleistocene. The morphological and metrical analyses of the phalanx ATE9-2 indicate that there are no essential differences between it and comparator fossil specimens for the genus Homo after 1.3 Ma (millions of years ago). Similar to Sima de los Huesos and Neandertal specimens, ATE9-2 is a robust proximal hand phalanx, probably reflecting greater overall body robusticity in these populations or a higher gracility in modern humans. The age of level TE9 from Sima del Elefante and morphological and metrical studies of ATE9-2 suggest that the morphology of the proximal hand phalanges and, thus, the morphology of the hand could have remained stable over the last 1.2-1.3 Ma. Taking into account the evidence recently provided by a metacarpal from Kaitio (Kenya) from around 1.42 Ma, we argue that modern hand morphology is present in the genus Homo subsequent to Homo habilis. Copyright © 2014 Elsevier Ltd. All rights reserved.

  2. Caracterización de sitios de percha del guajolote silvestre (Meleagris gallopavo mexicana) en Sierra Fría, Aguascalientes, México Roost sites characteristics of wild turkey (Meleagris gallopavo mexicana) in Sierra Fria, Aguascalientes, Mexico

    OpenAIRE

    Marcelo Márquez-Olivas; Edmundo García-Moya; Carlos González-Rebeles Islas; Humberto Vaquera-Huerta

    2007-01-01

    Entre octubre y noviembre del año 2001 y mayo de 2002 se localizaron 16 sitios de percha de guajolote silvestre (Meleagris gallopavo mexicana) en la Sierra Fría de Aguascalientes. El 87.5% de los sitios se encontraron en bosques de pino-encino (en rodales de pinos), en altitudes de 2500 a 2650 m. En la parte alta (2/3) de la cuesta se localizaron 8 de los sitios y 7 sobre laderas de exposición noreste, en una pendiente promedio de 38.9 ± 12.6%. El 62.5% de los sitios se usaron durante todo el...

  3. Trauma, diez años de experiencia, Hospital Vicente Corral Moscoso

    OpenAIRE

    Astudillo Molina, Rubén Arturo; Salamea Molina, Juan Carlos; Crespo Riquetti, Paola Marcela; Salamea Molina, Pablo Javier

    2010-01-01

    Objetivo Realizar una descripción demográfica, forma y estado de llegada, etiología, tipo de trauma y hallazgos, en pacientes intervenidos quirúrgicamente y dados de alta del servicio de Cirugía General del Hospital Vicente Corral Moscoso, Cuenca – Ecuador. Pacientes y métodos. Es un estudio descriptivo, realizado en un periodo de 10 años, 1995 al 2005; se revisó el libro de altas hospitalarias, identificando 1415 historias clínicas. Registrando: año, sexo, edad, procedencia, signos ...

  4. Factores de riesgo de violencia escolar (bullying) severa en colegios privados de tres zonas de la sierra del Perú

    OpenAIRE

    Isabel Amemiya; Miguel Oliveros; Armando Barrientos

    2009-01-01

    Objetivo: Identificar los factores de riesgo de violencia escolar (bullying) severa en alumnos de colegios privados de tres zonas de la sierra del Perú. Diseño: Estudio tipo encuesta. Institución: Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Participantes: Alumnos entre quinto de primaria y quinto de secundaria de colegios privados. Intervenciones: Una encuesta validada en estudios previos, para identificar violencia escolar (bullying), fue aplicada a 736 alumno...

  5. Estudio climático y bioclimático del Parque Natural Sierra de Grazalema

    OpenAIRE

    Naranjo Barea, Alfonso Jesús

    2016-01-01

    El Parque Natural Sierra de Grazalema, uno de los ámbitos más interesantes desde el punto de vista climático y bioclimático de la península, no está lo suficientemente estudiado. Por ello, en primer lugar, afrontamos un estudio climático de detalle, donde se analizan en profundidad las dos variables climáticas más relevantes (temperatura y precipitación). En vista de que la cartografía climática pública es muy general, hemos elaborado, con los valores térmicos y pluviométricos anuales disponi...

  6. VALORACIÓN LOCAL DEL PATRIMONIO NATURAL PARA EL DESARROLLO TURÍSTICO EN UN TERRITORIO RURAL TRANSFRONTERIZO (SIERRA DEL LAROUCO, GALICIA-NORTE DE PORTUGAL

    Directory of Open Access Journals (Sweden)

    Elena De Uña-Álvarez

    2017-01-01

    Full Text Available En la mayoría de los espacios rurales de montaña la oferta turístico - recreativa está basada en sus recursos naturales. El conocimiento de la percepción y las expectativas de los actores locales respecto a su valor y potencialidad es indispensable para fomentar un turismo sostenible. La Sierra del Larouco es un espacio transfronterizo que se extiende entre el sur de Galicia (N oroeste de España y el norte de Portugal. El objetivo principal de la investigación es conocer la percepción, las ideas y las expectativas de sus actores respecto a los bienes disponibles y su utilización como recursos para el desarrollo local a través de l turismo. Para ello, han sido realizadas 29 entrevistas a partir de un cuestionario - guía . Este trabajo presenta solo una parte de sus resultados en el contexto de un estudio exploratorio : los que expresan el grado de interés y la valoración que otorgan los actores clave al conjunto de recursos disponibles, entre los cuales el patrimonio natural ocupa una posición destacada ; al mismo tiempo, inciden en el potencial que confieren a este patrimonio “propio” como un conjunto de recursos turísticos para favor ecer la mejora del ámbito local.

  7. Del desarrollismo al (neoextractivismo (1969-2017. Auge, decadencia y resurgimiento de la minería del hierro en Sierra Grande, provincia de Río Negro (Argentina

    Directory of Open Access Journals (Sweden)

    Sebastián Gómez Lende

    2017-09-01

    Full Text Available Aunque en la Argentina la problemática del avance del extractivismo y la minería metalífera ha sido ampliamente debatida en tiempos recientes, en el pasado esta última actividad ha sido clave respecto de la configuración de la matriz productiva de ciertas provincias. Tal es el caso del complejo minero-fabril de Sierra Grande (provincia de Río Negro, única explotación metalífera surgida en el país por iniciativa del Estado nacional. Este trabajo analiza el auge, decadencia y resurgimiento de la minería del hierro en Sierra Grande, a la luz del contexto impuesto por proyecto desarrollista estatal primero (1969-1992, la fase neoliberal después (1993-2004, y finalmente el modelo (neoextractivista (2005-2017. Asimismo, se demuestra que este último período ha sido escenario del despliegue de variadas formas de acumulación por desposesión, como la privatización y extranjerización de bienes comunes, la configuración de enclaves exportadores, la superexplotación del trabajo, la expropiación político-económica y la desapropiación socio-ecológica.

  8. DEL HUERTO A LA CIUDAD: AGRICULTURA FAMILIAR Y APROVISIONAMIENTO URBANO EN LA SIERRA ECUATORIANA

    Directory of Open Access Journals (Sweden)

    Nasser Rebaï

    2012-12-01

    Full Text Available En Ecuador, la migración campesina es el motor principal de las recomposiciones del medio rural andino. En la provincia del Azuay, la disminución de la mano de obra en los últimos años ha provocado una desestructuración de las familias campesinas y una reorganización lógica de las tareas agrícolas. Sin embargo, gracias a la cercanía de la ciudad de Cuenca, los campesinos desarrollan una actividad comercial intensa, orientada hacia la ganadería y la agro-ecología. Si por una parte podemos considerar esta dinámica como el símbolo del renacimiento de la agricultura familiar, por otra parte falta todavía una visión ambiciosa para llegar verdaderamente a un modelo de desarrollo rural sustentable que erradique la pobreza rural y garantice la soberanía alimentaria en esta región andina.   ABSTRACT In Ecuador, the peasant migration is the main engine of the Andean rural recompositions. In the province of Azuay, the decrease in the labour force in recent years has caused a destructuring of rural families and a logical reorganization of the agricultural tasks. However, thanks to the proximity of the city of Cuenca, farmers develop an intense commercial activity, oriented towards livestock and the Agroecology. If on the one hand we can consider this dynamic as the symbol of the Renaissance of family farming, on the other hand lack still an ambitious vision to truly reach a model of sustainable rural development that will eradicate rural poverty and ensure food sovereignty in the Andean region.  

  9. EL DISEÑO DE ITINERARIOS TURÍSTICOS PARA LA PUESTA EN VALOR DEL PATRIMONIO TERRITORIAL. LAS ACEQUIAS DE CAREO EN EL PARQUE NACIONAL DE SIERRA NEVADA

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    María José Prados Velasco

    2011-01-01

    Full Text Available Este artículo propone el diseño de itinerarios turísticos apoyados en el sistema de acequias de careo en la cuenca del Guadalfeo, en la vertiente sur del Parque Nacional de Sierra Nevada. Las acequias de careo son elementos claves empleados en la Antigüedad para la funcionalidad de los espacios agrarios de alta montaña en zonas semiáridas. En la actualidad constituyen elementos patrimoniales de primer orden que contribuyen al mantenimiento de los paisajes culturales. El objetivo central es el de vincular la sostenibilidad en la práctica del turismo, con la puesta en valor de elementos patrimoniales y paisajísticos.

  10. Particularidades estructurales y determinación del stress principal a partir de la información de un perfil en la parte oriental de la Sierra del Rosario, Pinar del Río, Cuba

    Directory of Open Access Journals (Sweden)

    Dámaso Cáceres-Govea

    2003-03-01

    Full Text Available A partir de las descripciones de afloramientos y mediciones estructurales de estructuras disyuntivas y plicativas, con la utilización de sistemas que permiten el procesamiento de la información, se llega a resultados que sirven de base para el análisis y determinación de la posible orientación del stress principal σ1 en el momento en que ocurrieron los movimientos tectónicos que afectaron el corte en el occidente de Cuba. Se reporta y explica la presencia y posición de restos de hidrocarburos en vetas y grietas en las secuencias carbonatadas del corte en la porción más oriental de la Sierra.

  11. Relaciones isotópicas Sm/Nd en rocas graníticas y miloníticas de Sierras Pampeanas del noroeste Argentino

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    Kawashita, K.

    2005-04-01

    Full Text Available The Velasco, Copacabana and Paimán Ranges in Sierras Pampeanas, are constituted mainly by paleozoic plutonic bodies of the Famatinian cycle (Huaco, Antinaco and Paimán and for mylonitic rocks (TIPA Shear Zone, originated as a consequence of dynamic events happening during the Upper Ordovician-Devonian. The last magmatic event of the area would probably have of devonian age (Granite San Blas. Model-ages of two stages were calculated based on 147Sm/144Nd relationships; the obtained values are closely grouped at around 1594 Ma. and the more plausible interpretation seems to be a reworking of an Early Proterozoic protolith.Las sierras de Velasco, Copacabana y Paimán, en el ambiente de Sierras Pampeanas, están constituidas principalmente por cuerpos plutónicos del Paleozoico inferior, relacionados con el ciclo Famatiniano (Granitos Huaco, Antinaco y Paimán y por rocas miloníticas (Faja Milonítica TiPA, originadas a partir de estos protolitos como consecuencia de eventos dinámicos acaecidos durante el Ordovícico superior-Devónico. El último evento magmático del área es de edad probablemente devónica (Granito San Blas. Se calcularon edades modelos de «dos estadios» en base a relaciones 147Sm/144Nd; los valores obtenidos se presentan estrechamente agrupadas en torno a 1594 Ma. y se interpretan a este basamento como un protolito del Proterozoico medio retrabajado.

  12. Estado poblacional del orden Plecoptera (Insecta en el Parque Nacional Sierra Nevada en Venezuela y sus implicaciones para planes de conservación

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    Maribet Gamboa

    2010-12-01

    Full Text Available La distribución longitudinal de las especies de plecópteros fue examinada a lo largo del Parque Nacional Sierra Nevada en la región Andina del estado Mérida, Venezuela. El PNSN es uno de las más grandes regiones protegidas y abarca dos subcuencas hidrográficas importantes. Muestras cuantitativas fueron recolectadas en 7 ríos tributarios de estas cuencas a lo largo del PNSN desde febrero a mayo del 2009, con un total de 135 individuos de 4 especies del género Anacroneuria. Sólo en tres ríos (Nuestra Señora, La Picón y Corcovada se encontró la presencia de plecópteros, los análisis de componentes principales muestran que la caracterización del hábitat, la velocidad de la corriente, el oxígeno disuelto y la ausencia de fuentes de perturbación antrópica influyen en un hábitat idóneo para las poblaciones. Los plecópteros se hallan en peligro de desaparición o incluso se han llegado a extinguir en gran parte de su área de distribución como consecuencia de actividades humanas. Planes de conservación deben ser implementados con urgencia, como evitar zonas recreacionales y/o económicas en las cercanías de los mismos.Population status of insects of Plecoptera order in Sierra Nevada National Park in Venezuela and its implications for conservation planning. Longitudinal distribution of Plecoptera species were examined along the Sierra Nevada National Park in the Andean region of Merida State, Venezuela. PNSN is one of the largest protected areas and consists of two major sub-basins. Quantitative samples were collected in 7 river tributaries along the PNSN from February to May of 2009, and a total of 135 individuals and 4 species of the genus Anacroneuria were collected. Only three rivers (Nuestra Señora, La Picón y Corcovada found the presence of stoneflies, the principal component analysis show that the characterization of habitat, current velocity, dissolved oxygen and the absence of human disturbance sources of influence in

  13. Patrones espaciales de cambio de cobertura y uso del suelo en el área cafetalera de la sierra norte de Puebla

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    Virginia Evangelista Oliva

    2010-09-01

    Full Text Available La Sierra Norte de Puebla (SNP es una región con gran diversidad biológica y cultural en donde la cafeticultura ha tenido un papel relevante en el uso del suelo. El objetivo de esta investigación es conocer los patrones espaciales de la dinámica de cambio de la cobertura vegetal y el uso del suelo entre 1988-2003, y relacionarlos con las actividades de cafeticultura en la SNP. El análisis de cambio se realizó mediante una clasificación supervisada de dos imágenes de satélite Landsat, y se evaluó el cambio espacial entre las dos fechas mediante una matriz de detección de cambios. En ella se encontró que en el 58.4% del área no hubo cambios y en el 41.6% sí los hubo. Los principales tipos de cambio fueron de pastizal (cultivado e inducido o agricultura anual a cafetales con sombra/vegetación secundaria intermedia de bosque tropical o bosque mesófilo de montaña/cultivo permanente de cítricos; asimismo, el proceso de cambio de cobertura y uso del suelo está relacionado con la problemática actual del café.

  14. Prevalencia y factores de riesgo de infección por estreptococo grupo b en mujeres embarazadas de 34 a 41 semanas del servicio de obstetricia Hospital Vicente Corral Moscoso 2006

    OpenAIRE

    Sacoto Coello, Maritza Catalina de la Nube; Espinoza Peña, Andrea Paulina

    2007-01-01

    La infección por estreptococo del grupo B (GBS) es la principal causa de infección bacteriana y mortalidad por sepsis en los recién nacidos. La transmisión hacia el producto se da durante el trabajo de parto, a más de la mortalidad neonatal las secuelas neurológicas son importantes consecuencias de la infección por GBS, por lo tanto la detección y tratamiento oportuno debe realizarse en forma rutinaria. El objetivo de la presente investigación, es detectar la prevalencia de infección por GBS...

  15. The exploitation of faunal resources in the Neolithic of the Sierra de Atapuerca (Burgos: levels 19 and 20 of the Cueva del Mirador

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    Martín, Patricia

    2009-12-01

    Full Text Available The archaeozoological and taphonomical analyses of the faunal remains from levels 19 and 20 in the Mirador cave (Sierra of Atapuerca, Burgos are presented. The main aim of this work is threefold: to study how faunal resources were managed, to characterize the occupation of the cave and to understand how the environmental resources were exploited at the end of the sixth millennium and the beginning of the fifth millennium cal. BC. Results show the development of human communities with a complex organization and a great environmental adaptation. Shepherds used the cavity as a sheepfold and as a domestic space during almost all the year. Sheep and goat husbandry comprised the economic basis; these taxa were exploited mainly for their meat and milk. Breeding of cattle and hunting would have been complementary activities.

    En este trabajo se presentan los datos obtenidos a partir del análisis zooarqueológico y tafonómico de los restos faunísticos recuperados en los niveles 19 y 20 de la Cueva del Mirador (Sierra de Atapuerca, Burgos. El objetivo fundamental ha sido obtener información sobre la gestión de los recursos faunísticos y las características de ocupación de la cavidad y aprovechamiento del entorno durante el final del VI milenio y los inicios del V milenio cal. BC. Los resultados han mostrado el desarrollo de comunidades con una estructuración compleja y una gran adaptación a su entorno. La cavidad fue empleada por un grupo de agricultores y ganaderos, tanto como redil para el ganado como espacio doméstico y durante la práctica totalidad del año. La economía ganadera se basaría en la cría de ganado ovicaprino, explotado tanto para la obtención de carne como de leche. Esta práctica económica estaría complementada por la cría de ganado bovino y las prácticas cinegéticas.

  16. LA NOCIÓN DE PERSONA Y EL CONCEPTO DE IXTLAMATKI EN LA VISIÓN DEL MUNDO DE LOS NAHUAS DE LA SIERRA NEGRA DE PUEBLA

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    Laura Romero

    2007-12-01

    Full Text Available En la cosmovisión de los nahuas de San Sebastián Tlacotepec, municipio perteneciente a la Sierra Negra de Puebla, la noción de persona es uno de los ejes vertebrales para entender la forma en que es concebido elixtlamatki, el que sabe ver, especialista ritual encargado de los problemas de salud originados por la pérdida del alma, el daño al animal compañero y la brujería. A partir del análisis de los atributos otorgados al ixtlamatki, mismos que lo definen como un ser humano “especial”, podemos entender su función como intermediario entre el mundo humano y el “mundo-otro”, sus capacidades como “recuperador” de almas, su capacidad de transformarse en animal, la fortaleza de sus entidades anímicas y su facultad de actuar a voluntad durante sus sueños.   ABSTRACT In the world view of the nahua population of San Sebastian Tlacotepec, a village localized in the region denominated Sierra Negra in the state of Puebla, the “notion of person” is one of the principals elements necessary to understand the concept of ixtlamatki, “ the one who knows how to see”, ritual specialist in charge of health problems en cases like loss of soul, witchcraft or when the alter ego has been hurt. Beginning with the analysis of his attributes, which define him as special human being, we come closer to understand his function as intermediary between the human world and the “other world”; his power as “soul retriever” and other special abilities, for example, his capacity of transforming himself as well as his faculty to act intentionally in his dreams.

  17. Structural and lithological conditioning of the large karst systems of the Sierra de los Organos, Pinar del Rio, Cuba; Condicionantes estructurales y litologicas de los grandes sistemas karsticos de la Sierra de los Organos, Pinar del Rio, Cuba

    Energy Technology Data Exchange (ETDEWEB)

    Diaz Guanche, C.; Ramirez Hernandez, R.; Farfan Gonzalez, H.; Estevez Cruz, E.; Ordaz Hernandez, A.; Aldana Vilas, C.

    2016-07-01

    he karst, a complex phenomenon, is governed by a number of variables which dictate its genesis and evolution. Among these variables tectonic settings and lithology play the main role. In Cuba, approximately 65% of the territory is occupied by karst. The Sierra de los Organos, part of Cordillera de Guaniguanico, has some of the largest karstic systems in the country. With the aim of demonstrating the relationship between the spatial and morphological development of the underground karstic systems and the geological structure and lithology of the area, several structural and morphological measurements and field observations have been made. These measurements and observations allowing us to conclude that the karstic processes take place mainly in massive, relatively homogeneous and very thick limestone in the Sierra de los Organos. Moreover, these rocks are characterized by both low porosity and a high degree of fracturing. These karstic forms are also conditioned by the existence of various fracturing systems with general NE-SW and NW-SE orientations. Interception of these fracturing systems provides, as expected, areas with the largest volumes of karstic cavities. (Author)

  18. Manual de procesos de gestión financiera aplicado al Hospital Provincial General Docente Vicente Corral Moscoso

    OpenAIRE

    Rojas Ortega, Angélica Magdalena; Trelles Torres, Silvia América

    2007-01-01

    La motivación de esta tesis fue el emplear conocimientos adquiridos en el transcurso de nuestros estudios académicos e investigaciones, en una Institución Pública como es el Hospital "Vicente Corral Moscoso". Nuestro estudio consta de seis capítulos en los cuales describimos varios conceptos y elementos importantes para la comprensión de este manual, en una Institución del Sector Público no Financiero, donde intervienen leyes, disposiciones legales y acuerdos vigentes emitidos por el Minis...

  19. Caracterización de sitios de percha del guajolote silvestre (Meleagris gallopavo mexicana en Sierra Fría, Aguascalientes, México Roost sites characteristics of wild turkey (Meleagris gallopavo mexicana in Sierra Fria, Aguascalientes, Mexico

    Directory of Open Access Journals (Sweden)

    Marcelo Márquez-Olivas

    2007-06-01

    Full Text Available Entre octubre y noviembre del año 2001 y mayo de 2002 se localizaron 16 sitios de percha de guajolote silvestre (Meleagris gallopavo mexicana en la Sierra Fría de Aguascalientes. El 87.5% de los sitios se encontraron en bosques de pino-encino (en rodales de pinos, en altitudes de 2500 a 2650 m. En la parte alta (2/3 de la cuesta se localizaron 8 de los sitios y 7 sobre laderas de exposición noreste, en una pendiente promedio de 38.9 ± 12.6%. El 62.5% de los sitios se usaron durante todo el periodo de estudio y el resto, de manera ocasional. La mayoría de los dormideros se encontraron cerca de comederos o cebaderos y de parcelas agrícolas. Se contabilizaron de 1 a 23 árboles de percha utilizados por sitio, distribuidos a una distancia promedio de 24.4 ± 17.8 metros. El 81.2% de los árboles (n=170 fueron pinos (Pinus teocote, P. durangensis, P. leiophylla y P. michoacana, 17.6% encinos (Quercus laurina, Q. grisea y Q. eduardii y 1.2% madroños (Arbutus arizonica. La altura promedio de los árboles fue de 16.6 ± 4.4 m y el diámetro 43.2 ± 11.5 cm. La preferencia del guajolote silvestre por utilizar pinos como dormideros en lugar de otras especies arbóreas, se debe posiblemente a que son árboles de mayor porte o a la conformación de su dosel; sin embargo, se ha observado que en lugares donde hay pocos pinos, los guajolotes utilizan para dormir otros árboles de características semejantes, como encinos, madroños o sicomoros.Sixteen roosting sites of Gould's wild turkey (Meleagris gallopavo mexicana were found between October and November of 2001 and May of 2002 in Sierra Fría, Aguascalientes. A large percentage (87.5% of the roost sites was located in oak-pine forest (in pine stands, at an elevation range of 2500 to 2650 meters. Eight roost sites were on the upper portion (2/3 of the ridge, and 7 at northeast exposures with an average slope of 38.9 ± 12.6%. Most (81.2% of the roost trees (n =170 were pines (Pinus teocote, P

  20. ALMACENES DE CARBONO Y ESTABILIDAD DE LA MATERIA ORGÁNICA DEL SUELO EN UN AGROECOSISTEMA CAFETALERO EN LA SIERRA SUR DE OAXACA, MÉXICO

    Directory of Open Access Journals (Sweden)

    Gustavo Alvarez Arteaga

    2012-12-01

    Full Text Available Se evaluó la capacidad de los suelos de un agroecosistema cafetalero de sombra bajo diferentes condiciones de manejo para acumular formas estables de carbono, en la Sierra Sur de Oaxaca; para ello, se cuantificó el almacén de carbono edáfico y se realizó el aislamiento y caracterización química de la materia orgánica del suelo mediante fraccionamiento químico, espectroscopía UV-visible e infrarroja en los primeros 40 cm de profundidad. Los resultaron no mostraron diferencias significativas para los almacenes de carbono entre condiciones de manejo, situándose en valores promedio de 150 Mg C ha-1. Los patrones de humificación son consistentes para todos los suelos e indican que más del 50 % de la materia orgánica del suelo se encuentra en las huminas de insolubilización y entre el 15 y 20 % corresponde a los ácidos húmicos. Esta fracción, presumiblemente la más estable, está conformada por moléculas cuya aromaticidad y maduración tiene una relación positiva con el incremento de altitud y el contenido de arcillas en el suelo. De acuerdo a lo anterior se corrobora la capacidad de los agroecosistemas cafetaleros bajo sombra para acumular elevados contenidos de carbono en formas estables asociadas con la fracción mineral del suelo.

  1. Hábitos alimentarios del venado cola blanca Odocoileus virginianus (Artiodactyla: Cervidae en el Parque Natural Sierra Nanchititla, Estado de México

    Directory of Open Access Journals (Sweden)

    Ulises Aguilera-Reyes

    2013-03-01

    Full Text Available El venado cola blanca es una especie con una gran plasticidad conductual y de adaptación en diferentes hábitat. En el Parque Sierra Nanchititla en el Estado de México se realizó un estudio para determinar los hábitos alimentarios en el bosque mesófilo de montaña (BMM y bosque de pino-encino (BPE. De junio 1990 a mayo 1992 se recolectaron 104 muestras de excremento de venado en las dos zonas de estudio. Aplicamos el índice de Morisita y la correlación de Spearman para determinar la preferencia alimentaria. Se utilizó el análisis histológico de heces fecales para herbívoros las cuales se compararon con muestras de tejidos vegetales de plantas de la zona de estudio. Los resultados muestran que consume el 79.44% de especies vegetales del BMM y 20.56% del BPE. Existe cierta tendencia en la selectividad de 12 de las 14 especies de plantas localizadas en el BMM, mientras que para el BPE no se aprecia tal tendencia. Las especies clave que for- man parte de la alimentación elemental del venado fueron: Acalypha setosa, Smilax pringlei, Psidium sartorianum y Dendropanax arborea. El consumo de plantas no varió sig- nificativamente entre la época seca y lluviosa en función de la forma biológica (X2=12, p=0.21. Sin embargo, durante la época seca existe cierta tendencia a consumir árboles y a finales de la época de lluvia a consumir hierbas (Z=1.61, p=0.95. Los datos indican que el venado puede ser selecti- vo con plantas del BMM, mientras que para el BPE tiende a ser oportunista.

  2. LA SIERRA DE CARTAGENA-LA UNIÓN (MURCIA: UN EJEMPLO DE ACTIVIDAD TURÍSTICA A TRAVÉS DEL PATRIMONIO MINERO

    Directory of Open Access Journals (Sweden)

    Francisco José Morales Yago

    2015-01-01

    Full Text Available El cese final en el año 1991 de la actividad minera en la Sierra de Cartagena-La Unión en la Región de Murcia supuso para esta comarca el inicio de un gran declive económico que no ha encontrado respuesta hasta tiempos recientes, en donde la iniciativa para la puesta en valor del importante legado minero-industrial está sirviendo de base en la creación de un proyecto turístico complementario al tradicional de sol y playa ubicado en La Manga del Mar Menor y demás espacios litorales. El análisis DAFO incluido como metodología principal de este trabajo permitirá a través de la participación de distintos colectivos conocer y analizar el presente así como la proyección de futuro de esta nueva actividad que potencialmente supondrá un importante cambio en la actividad socioeconómica de la comarca y por consiguiente de sus habitantes.

  3. 8th February 2011-Rector Universidad Autónoma de Sinaloa Mexico Dr Victor Antonio Corrales Burgeño-Mexico-visiting ALICE cavern and tunnel with ALICE Spokesperson P. Giubellino

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    Photo 1,3-14:The delegation visiting ALICE cavern Photo 2:Dra. Beatriz E. Rodríguez Pérez\tDirectora del Centro de Políticas de Género para la igualdad entre Hombres y Mujeres,Dr Victor Antonio Corrales Burgeño,P. Giubellino Photo 15-29:The delegation visiting LHC Tunnel Photo 30-57:Signature of the Guest Book with CERN Director-General R. Heuer and Head of International Relations F. Pauss Photo 58:Adviser for Mexico J. Salicio,ALICE Collaboration Universidad Autonoma de Sinaloa I. Leon Monzon,ALICE Collaboration Centro Invest. Estudios Avanz. IPN (Cinnestav) G. Herrera Corral,R. Heuer,Dr Victor Antonio Corrales Burgeño,F. Pauss,Dra. Beatriz E. Rodríguez Pérez,Directora de Relaciones InternacionalesMC. América M. Lizárraga González

  4. Hallazgo de un endocarpo del genero Acer en niveles del Cretácico superior del embalse de Pedrezuela (Guadalix de la Sierra

    Directory of Open Access Journals (Sweden)

    Lesiak, M. A.

    1996-12-01

    Full Text Available In this paper is described and discussed an endocarp of Acer genus that exhibits a morphology like the living species A. buergerianum Miquel. The fruit was met in the upper part of Cretaceous series from the Pedrezuela barrier of Madrid Community. We propose a new denomination for the plant that contains this endocarp: Acer palaeobuergerianum n. fsp. This name has only taxonomic value. The prefix is give in order to the age and -buergerianum by its similarity with the actual species.Se describe y discute un endocarpo fósil perteneciente al género Acer, encontrado en el Cretácico superior del embalse de Pedrezuela (Madrid. Este fruto muestra una marcada semejanza con los endocarpos de la especie actual Acer buergerianum Miquel. Se propone una nueva denominación, con valor taxonómico, para la planta: Acer palaeobuergerianum n. fsp. El prefijo palaeo sugiere su edad y la denominación - buergerianum su semejanza morfológica con la especie actual.

  5. Study of Photovoltaic Potential Over the Rooftops of the Town of Miraflores de la Sierra (Madrid); Estudio del Potencial Fotovoltaico sobre los Tejados del Núcleo Urbano de Miraflores de la Sierra (Madrid)

    Energy Technology Data Exchange (ETDEWEB)

    Martín Ávila, A. Ma.; Berdugo Zamora, A.

    2015-07-01

    This report presents the main results of the study on the photovoltaic potential developed in the Madrid municipality of Miraflores de la Sierra (Spain). This study is part of the gSolarRoof project, development of a geographic model for the evaluation of solar potential on roofs in urban and suburban areas, where it has developed the first prototype model. Miraflores has a large PV potential capable of meeting, in for good measure, their electrical needs. The use of roof areas of urbanizations is potentially superior to those of the central part of the city, mainly due to shadow effects in the city center. The main value of the study is a series of thematic maps depicting the annual solar irradiation and the power and energy to the five major commercial PV technologies studied. These maps are complemented by a web mapping viewer that allows us to analyze the results at the building. This study is intended to be continuity in the development of new features for gSolarRoof model and applying it to other municipalities.

  6. Petrografía, caracterización geoquímica y análisis microestructural del granito del cerro Siempre Amigos, sierras de Azul, Tandilia

    OpenAIRE

    Angeletti, Melisa; Frisicale, María Cristina; Dimieri, Luis V

    2016-01-01

    El cerro Siempre Amigos integra las sierras de Azul, Tandilia, distante 28 km al sur de la ciudad de Azul y 3 km al norte de la megacizalla de Azul, zona de cizalla subvertical donde el basamento se encuentra deformado a milonitas y ultramilonitas. La litología predominante en el cerro Siempre Amigos es un granito paleoproterozoico deformado que en el centro y hacia los bordes se encuentra interdigitado con una roca gnéisica y cuerpos de anfibolitas subverticales de rumbo similar a la foliaci...

  7. Lipid corralling and poloxamer squeeze-out in membranes

    DEFF Research Database (Denmark)

    Wu, G.H.; Majewski, J.; Ege, C.

    2004-01-01

    Using x-ray scattering measurements we have quantitatively determined the effect of poloxamer 188 (P188), a polymer known to seal damaged membranes, on the structure of lipid monolayers. P188 selectively inserts into low lipid-density regions of the membrane and "corrals" lipid molecules to pack...... tightly, leading to unexpected Bragg peaks at low nominal lipid density and inducing lipid/poloxamer phase separation. At tighter lipid packing, the once inserted P188 is squeezed out, allowing the poloxamer to gracefully exit when the membrane integrity is restored....

  8. Capra alba Moyà-Solà, 1987 del Pleistoceno Inferior de la Sierra de Quibas (Albanilla, Murcia, España

    Directory of Open Access Journals (Sweden)

    Romero, G.

    2006-12-01

    Full Text Available The first palaeontological study of the locality of Quibas dates from the end of the 1990ties (Montoya et al., 1999, describing over 60 vertebrate taxa. One of these was a caprine assigned to Capra sp. aff. Capra alba. Recent excavations yielded new remains of this taxon, which permits a more profound study of its affinities and an assignation to Capra alba, without reservation. This assignation is based on the morphological and metrical comparison of the skulls, horn cores, dentition and metapodials from Quibas with those of Capra alba from Venta Micena (Orce Granada.A finales de la década de los 90 se realizó el primer estudio paleontológico del yacimiento de la Sierra de Quibas (Montoya et al., 1999 en el que se describieron más de 60 taxones de vertebrados. Uno de ellos fue el de un caprino asignado como Capra sp. aff Capra alba. Las últimas campañas de excavación han librado nuevos restos de este taxón, lo que ha permitido poder estudiarlo con mayor profundidad y asignarlo a Capra alba. Esta atribución se basa en la comparación morfológica y métrica de los cráneos, núcleos óseos, dentición y metápodos con los ejemplares de C. alba de Venta Micena (Orce, Granada.

  9. Hábitos alimentarios del venado cola blanca Odocoileus virginianus (Artiodactyla: Cervidae en el Parque Natural Sierra Nanchititla, Estado de México

    Directory of Open Access Journals (Sweden)

    Ulises Aguilera-Reyes

    2013-03-01

    Full Text Available El venado cola blanca es una especie con una gran plasticidad conductual y de adaptación en diferentes hábitat. En el Parque Sierra Nanchititla en el Estado de México se realizó un estudio para determinar los hábitos alimentarios en el bosque mesófilo de montaña (BMM y bosque de pino-encino (BPE. De junio 1990 a mayo 1992 se recolectaron 104 muestras de excremento de venado en las dos zonas de estudio. Aplicamos el índice de Morisita y la correlación de Spearman para determinar la preferencia alimentaria. Se utilizó el análisis histológico de heces fecales para herbívoros las cuales se compararon con muestras de tejidos vegetales de plantas de la zona de estudio. Los resultados muestran que consume el 79.44% de especies vegetales del BMM y 20.56% del BPE. Existe cierta tendencia en la selectividad de 12 de las 14 especies de plantas localizadas en el BMM, mientras que para el BPE no se aprecia tal tendencia. Las especies clave que for- man parte de la alimentación elemental del venado fueron: Acalypha setosa, Smilax pringlei, Psidium sartorianum y Dendropanax arborea. El consumo de plantas no varió sig- nificativamente entre la época seca y lluviosa en función de la forma biológica (X2=12, p=0.21. Sin embargo, durante la época seca existe cierta tendencia a consumir árboles y a finales de la época de lluvia a consumir hierbas (Z=1.61, p=0.95. Los datos indican que el venado puede ser selecti- vo con plantas del BMM, mientras que para el BPE tiende a ser oportunista.Food habits of the white-tailed deer, Odocoileus virginianus (Artiodactyla: Cervidae in Nanchititla Natural Park, Mexico. White-tailed deer is a species with a large behavioral plasticity and adapta- tion to different habitats, including their food habits. This study was conducted with the aim to determine the food habits of this species in the cloud (BMM and pine-oak (BPE forests. Deer scats and plant samples were obtained following standard methods, from Sierra

  10. Factores de riesgo de violencia escolar (bullying severa en colegios privados de tres zonas de la sierra del Perú

    Directory of Open Access Journals (Sweden)

    Isabel Amemiya

    2009-12-01

    Full Text Available Objetivo: Identificar los factores de riesgo de violencia escolar (bullying severa en alumnos de colegios privados de tres zonas de la sierra del Perú. Diseño: Estudio tipo encuesta. Institución: Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Participantes: Alumnos entre quinto de primaria y quinto de secundaria de colegios privados. Intervenciones: Una encuesta validada en estudios previos, para identificar violencia escolar (bullying, fue aplicada a 736 alumnos, entre quinto de primaria y quinto de secundaria, de colegios privados de Ayacucho, Huancavelica y Cusco (Sicuani. Se consideró bullying severo cuando contestaron positivamente 5 a más de las 9 opciones posibles de la pregunta que indagaba sobre los tipos de violencia. Se comparó 37 alumnos portadores de bullying severo con 74 alumnos tomados al azar del grupo que no tuvo violencia. Con análisis bivariado y multivariado de regresión logística se identificó factores asociados significativamente a la violencia escolar severa. Principales medidas de resultados: Factores de riesgo de violencia escolar (bullying severa. Resultados: La violencia escolar severa se asoció significativamente con reacción de padres al conocer el hecho, repetición de la amenaza a pesar de comunicar las agresiones, presencia de pandilleros en el colegio, tener amigos pandilleros y poseer defecto físico. La regresión logística encontró asociación significativa con la reacción de los padres, presencia de pandilleros y poseer un defecto físico. Conclusiones: Se ha encontrado que la violencia escolar severa se asocia a múltiples factores de riesgo, que pueden y deben ser detectados precozmente, debido al daño psicológico que produce en los estudiantes.

  11. Geology and geochemistry of Pelagatos, Cerro del Agua, and Dos Cerros monogenetic volcanoes in the Sierra Chichinautzin Volcanic Field, south of México City

    Science.gov (United States)

    Agustín-Flores, Javier; Siebe, Claus; Guilbaud, Marie-Noëlle

    2011-04-01

    This study focuses on the geology and geochemistry of three closely-spaced monogenetic volcanoes that are located in the NE sector of the Sierra Chichinautzin Volcanic Field near México City. Pelagatos (3020 m.a.s.l.) is a small scoria cone (0.0017 km 3) with lava flows (0.036 km 3) that covered an area of 4.9 km 2. Cerro del Agua scoria cone (3480 m.a.s.l., 0.028 km 3) produced several lava flows (0.24 km 3) covering an area of 17.6 km 2. Dos Cerros is a lava shield which covers an area of 80.3 km 2 and is crowned by two scoria cones: Tezpomayo (3080 m.a.s.l., 0.022 km 3) and La Ninfa (3000 m.a.s.l., 0.032 km 3). The eruptions of Cerro del Agua and Pelagatos occurred between 2500 and 14,000 yr BP. The Dos Cerros eruption took place close to 14,000 yr BP as constrained by radiocarbon dating. Rocks from these three volcanoes are olivine-hypersthene normative basaltic andesites and andesites with porphyritic, aphanitic, and glomeroporphyritic textures. Their mineral assemblages include olivine, clinopyroxene, and orthopyroxene phenocrysts (≤ 10 vol.%) embedded in a trachytic groundmass which consists mainly of plagioclase microlites and glass. Pelagatos rocks also present quartz xenocrysts. Due to their high Cr and Ni contents, and high Mg#s, Pelagatos rocks are considered to be derived from primitive magmas, hence the importance of this volcano for understanding petrogenetic processes in this region. Major and trace element abundances and petrography of products from these volcanoes indicate a certain degree of crystal fractionation during ascent to the surface. However, the magmas that formed the volcanoes evolved independently from each other and are not cogenetically related. REE, HFSE, LILE, and isotopic (Sr, Nd, and Pb) compositions point towards a heterogeneous mantle source that has been metasomatized by aqueous/melt phases from the subducted Cocos slab. There is no clear evidence of important crustal contributions in the compositions of Pelagatos and

  12. Saurios de la reserva de la biósfera "Sierra del Rosario" Pinar del río, Cuba. Evaluación ecológica de tres comunidades

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    Mercedes Martínez Reyes

    1995-01-01

    Full Text Available At present, integrated studies about flora and fauna are being carried out in the Biosphere Reserve Sierra del Rosario, Pinar del Río, Cuba; and as a contribution to them, it is offered information about its composition of saurians and the structure of three communities belonging to this faunistic group; the two first were associated to the secundary vegetation, while the third one to an evergreen forest. Visual countings were done in eigth locations during the wich the kind of substratum where every animal as found was taken down. After being achieved the final data by means of the transects method, some ecological evaluations were performed. Thirteen species of lizards were observed, eleven of them belonging to the Polychridae family, one to the Tropiduridae family and one to the Gekkonidae family. Tree and bush trunks as well as the ground were the substratums most traveled. The community which habitat presented a lesser degree of anthropical damage was the one with higher endemism. The species Anolis homolechis, A. alutaceus and A. sagrai were abundant in the secundary vegetation, while A. allogus was abundant in the evergreen forest. The higher faunistic similarity was observed in communities associated to similar vegetal formations. Species riches, diversity, equitativity and concentration of species showed higher values in communities which lived in a secundary vegetation.

  13. Avistamientos recientes del águila real (Aquila chrysaetos en la Reserva de la Biosfera Sierra Gorda de Guanajuato, México, y sus implicaciones en el plan de manejo de la reserva

    Directory of Open Access Journals (Sweden)

    José Ismael Campos-Rodríguez

    2016-07-01

    Full Text Available Documentamos por primera vez la presencia del águila real (Aquila chrysaetos dentro de la Reserva de la Biosfera Sierra Gorda de Guanajuato (rbsgg en el estado de Guanajuato, México. En mayo de 2015 observamos una pareja de águila real cazando en la localidad de Mesita del Tigre, municipio de Victoria, Guanajuato. Nuestro registro tiene implicaciones en las políticas de uso de suelo contenidas en el Plan de Manejo de la rbsgg, donde sugerimos incluir medidas explícitas de protección del hábitat de la especie y el establecimiento de programas de monitoreo en aquellas subzonas donde se ha registrado al águila real o existe potencial para la anidación de la especie.

  14. Single-atom gating and magnetic interactions in quantum corrals

    Energy Technology Data Exchange (ETDEWEB)

    Ngo, Anh T.; Kim, Eugene H.; Ulloa, Sergio E.

    2017-04-01

    Single-atom gating, achieved by manipulation of adatoms on a surface, has been shown in experiments to allow precise control over superposition of electronic states in quantum corrals. Using a Green's function approach, we demonstrate theoretically that such atom gating can also be used to control the coupling between magnetic degrees of freedom in these systems. Atomic gating enables control not only on the direct interaction between magnetic adatoms, but also over superpositions of many-body states which can then control long distance interactions. We illustrate this effect by considering the competition between direct exchange between magnetic impurities and the Kondo screening mediated by the host electrons, and how this is affected by gating. These results suggest that both magnetic and nonmagnetic single-atom gating may be used to investigate magnetic impurity systems with tailored interactions, and may allow the control of entanglement of different spin states.

  15. Análisis tipológico de las estructuras de las construcciones rurales tradicionales de barro. La casa de corral en el Páramo de León (España

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    Rego Sanmartín, Teresa

    2000-08-01

    Full Text Available Traditional rural buildings reflect the building techniques inherited from ancestors, where materials mastery is proved. In this job we analyse the structure of one of the most relevant Spanish traditional agrarian building: the "casa de corral"(yard house. Thirty seven "corrales" (yards of the vernacular earthen construction in the "Páramo de León"(León, Spain were analysed. It was necessary think up an analysis method, which we called "round analysis method". Generally. radial cross sections of the yard have a main space between two earth walls bearing over stone foundation, which support floor framing, the roof framing, roof sheathing and arabic curved tiles. A gantry is usually built inward the yard, on a stone baseLas construcciones rurales tradicionales suelen reflejar el buen hacer de quienes han heredado las técnicas de sus antepasados, demostrando un dominio admirable de los materiales. En este trabajo nos centramos en el análisis estructural de uno de los edificios más emblemáticos de las construcciones agrarias tradicionales peninsulares: la casa de corral. Se analizaron 37 de estos edificios, uniformemente repartidos por la comarca del Páramo de León (España. pertenecientes a la denominada construcción de barro rural tradicional contemporánea. Para llevar a cabo el estudio fue necesario idear el denominado método giratorio de análisis. en virtud del cual se realizan sucesivos cortes radiales al corral. Esto nos permitió establecer las características constructivas más relevantes de dichos edificios. En general. las secciones radiales del corral suelen contar con un volumen principal de gruesos muros de carga a base de tapial sobre cimiento de piedra. sustentando los forjados y la estructura de cubierta, cuya impermeabilidad se logra mediante teja árabe. dispuesta sobre enlabiado de madera o sobre rama entretejida. Hacia el interior del corral se suele construir el corredor porticado, cuyos soportes transmiten las

  16. Apendicectomías no enfermas en el Hospital Vicente Corral Moscoso y Hospital José Carrasco Arteaga, Cuenca 2014

    OpenAIRE

    Montero Tapia, Edgar Paúl

    2016-01-01

    Objetivo General Determinar la prevalencia de Apendicectomías No Enfermas en pacientes mayores de 15 años en el servicio de cirugía del Hospital Vicente Corral Moscoso y Hospital José Carrasco Arteaga durante el 2014. Método: Se realizó un estudio transversal, en 300 pacientes sometidos a apendicectomía de los HVCM y HJCA en la Ciudad de Cuenca; se recogieron datos demográficos, cuadro clínico, resultados de exámenes complementarios de sangre y resultados de la escala de Alvarado y RIP...

  17. Glaciarismo en la divisoria cantábrica: La evolución del glaciarismo Cuaternario en la Sierra de Cebolleda (León

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    Serrano Cañadas, Enrique

    2015-06-01

    Full Text Available The Sierra de Cebolleda (León province, Castilla y León is a 10 km length part of tha Cantabrian Divide, located to the South of Picos de Europa, the highest massif in the Cantabrian Mountain. The high lithological diversity and monocline structure have addressed the Quaternay glaciation. The paper studies the glacial evolution by mean of the glacial features and the objective is to know the temporal evolution and extent of Quaternary glaciers and to establish as accurate as possible correlations with the other Cantabrian massifs. A geomorphological map to scale 1/25,000, ELA calculation of each glacier and glacial period, and a morphostrtigraphical analysis, including aspect, front altitudes, glaciers lenght and ELA have been made. Eleven glaciers systems have been reconstructed, defining in the North side tongues longer than 5 km and a medium altitude of fronts of 1120 m a.s.l. The moraine complex point to between one and four glacial stages in each valley. Four glacial stages have been establish: two of alike extent (F1 and F2, a retreated and equilibrium stage (F3 and a marginal glacial stage defined by small cirque glacier (F4 and extreme periglacial processes (rock glaciers, block slopes, block streams and stratified debris. Finally, the glacial stages have been correlated with known absolute dating of other massif of the Cantabrian Mountain.La Sierra de Cebolleda constituye 10 km de la divisoria cantábrica, en dirección E-W, al sur de los Picos de Europa, el macizo más alto de la cordillera. Su elevada diversidad litológica y la estructura monoclinal condicionan el glaciarismo cuaternario. Este trabajo estudia la evolución glaciar mediante las huellas geomorfológicas. El objetivo es conocer la evolución y extensión temporal del glaciarismo para establecer correlaciones lo más precisas posibles con los restantes macizos cantábricos. Se ha realizado una cartografía geomorfológica E.1/25.000, la estimación de la ELA en cada

  18. Hepatitis fulminante en la Sierra Nevada: Una forma de superinfección del virus delta con el virus de la hepatitis B.

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    Alvaro Villanueva

    1992-06-01

    Full Text Available Durante septiembre de 1980 a octubre de 1983, se realizó un estudio seroepidemiológico para hepatitis A y B, en 258 personas en una ciudad (Santa Marta población de 250.000 y tres pequeños municipios (Santa Rosalía, Julio Zawady y Aracataca, poblaciones de 768, 800 y 5.000 habitantes respectivamente. La presencia de hepatitis A se encontró en un 77 a 93% (IgG Hepatitis A. Hbs Ag o Anti-Hbs Ag en 30.5% de la población en dos municipios (Santa Rosalía y Julio Zawady, en 2.5% en el municipio de Aracataca y 48.5% en la ciudad de Santa Marta. La presencia del Agente Delta (Anti-delta en el suero se determinó también en estas mismas poblaciones, encontrándose ausente en la ciudad y uno de los municipios (Aracataca, en contraste con una prevalencia de 13.7% y 22% en Julio Zawady y Santa Rosalía (P: 0.0001. Se excluyeron por historia clínica, antecedentes de drogadicción, transfusiones, o prácticas homosexuales, como mecanismos de transmisión de los virus B y delta. En veinte pacientes con diagnóstico histopalógico de hepatitis fulminante y en quienes se descartaron otras etiologías se demostró la presencia serológica de los virus de la hepatitis By Delta. De estos veinte, diez provenían de Julio Zawady y los otros diez de Santa Rosalía. La evolución clínica de esta enfermedad fue indistinguible de otras causas de falla hepática aguda. La mortalidad de estas formas fulminantes de hepatitis alcanzaron hasta un 65%. Los corticoides no modificaron el curso de esta enfermedad. La población joven mostró mayor compromiso y peor diagnóstico (P:0.033. La hepatitis fulminante de la Sierra Nevada de Santa Marta es el resultado de la superinfección con el virus Delta sobre la infección virus B. La aparición simultánea de casos intrafamiliares sugiere una relación importante entre los grupos comprometidos, aunque la forma exacta de transmisión permanece aún desconocida.

  19. Síntesis biogeográfica y fitosociológica de la vegetación del Parque Natural de la Sierra de Baza (Cordillera Bética, Andalucía, Sur de España

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    Olmedo-Cobo, José Antonio

    2014-12-01

    Full Text Available We present a synthesis of the vegetation of Natural Park of Sierra de Baza (Baetic mountain range, Andalusia, Southern Spain from a biogeographical and phytosociological approach integrated; the guidelines of the analysis are the series of vegetation and plant associations. We start of the literature review and field work to the syntaxonomical classification of different phytocoenoses identified, highlighting the status of this territory as enclave among various chorological sectors of Betic biogeographic province that have a clear influence on the configuration of different plant communities of Sierra de Baza. This has allowed the incorporation of new features and nuances of some phytosociological issues recently established, from the last biogeographical sectorization has been carried out for this territory.Se presenta una síntesis de la vegetación del Parque Natural de la Sierra de Baza (Cordillera Bética, Andalucía, Sur de España desde un enfoque biogeográfico y fitosociológico integrado, siendo las directrices del análisis las series de vegetación y las asociaciones vegetales. Se parte de la revisión bibliográfica y del trabajo de campo para la clasificación sintaxonómica de las distintas fitocenosis identificadas, resaltando la condición de este territorio como enclave situado entre varios sectores corológicos de la provincia biogeográfica Bética que tienen una clara influencia en la configuración de las diferentes comunidades vegetales de la Sierra de Baza. Todo ello ha permitido incorporar algunas novedades y matizaciones de ciertas cuestiones fitosociológicas establecidas recientemente, partiendo de la última sectorización biogeográfica que se ha llevado a cabo para este territorio. [fr] L’article pose une synthèse de la végétation du parc naturel de la Sierra de Baza (Cordillère Bétique Andalousie, Sud de l’Espagne à partir d’une approche biogéographique et phytosociologique intégrée; les

  20. Ecología del crecimiento de una lagartija del género Xenosaurus Peters 1861 (Squamata: Xenosauridae en la Reserva de la Biosfera, Sierra Gorda, Querétaro, México Growth ecology of a lizard of the genus Xenosaurus Peters 1861 (Squamata: Xenosauridae from the Biosphere Reserve, Sierra Gorda, Querétaro, México

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    J. GASTÓN ZAMORA-ABREGO

    2012-09-01

    Full Text Available Analizamos el crecimiento corporal de una nueva especie de lagartija endémica del género Xenosaurus Peters, ubicada en la Reserva de la Biósfera, Sierra Gorda - Querétaro, México. Se estimaron las tasas de crecimiento corporal y se analizaron a partir de los modelos de crecimiento de Von Bertalanffy, logístico por longitud y logístico por peso. Para describir el patrón de crecimiento de estas lagartijas, utilizamos el modelo logístico por longitud debido a que fue el modelo que tuvo el mejor ajuste a las tasas observadas de crecimiento corporal. No encontramos diferencias significativas entre machos y hembras en el parámetro característico de crecimiento ni en la talla asintótica proyectada. Por lo tanto, se construyó una sola curva de crecimiento para ambos sexos. Los machos alcanzan la madurez sexual a los 24 meses, mientras que las hembras lo hacen hasta los 37 meses. Las tasas de crecimiento independientes de la talla no fueron estadísticamente diferentes entre años (2001, 2002 y 2003, ni entre estaciones (estación húmeda y seca. Nuestros resultados sugieren que la variación en el crecimiento corporal de esta especie, no es causada exclusivamente por las variaciones ambientales, sino más bien por una compleja combinación de factores ambientales y bases genéticas.We analyzed variation in body growth of a new lizard species of the genus Xenosaurus Peters that is endemic to the Biosphere Reserve, Sierra Gorda - Querétaro, México. We calculated body growth rates and analyzed them by means of the Von Bertalanffy, logistic-by-length, and logistic-by-weight growth models. We used the logistic-by-length model to describe the growth pattern of these lizards because this model provided the best fit to the observed body growth rates. No significant differences were found between males and females in the characteristic growth parameter or in the projected asymptotic size. Therefore, a single growth curve was constructed for both

  1. Quantum corral effects on competing orders and electronic states in chiral d + id or f-wave superconductors.

    Science.gov (United States)

    Zuo, Xian-Jun

    2018-03-07

    Self-consistent calculations are performed to characterize the quantum corral effects on the electronic states of chiral d + id or f-wave superconductors in this paper. A variety of spatial structures of competing orders are revealed in the presence of ferromagnetic nano-corrals, and superconducting islands are found to be absent in the case of small corrals while being seen for large corrals. Compared with the local suppression of superconductivity by a magnetic impurity inside the corral, surprisingly, an additional remarkable feature, i.e., obvious oscillations or enhancement of superconductivity around a non-magnetic impurity, is observed inside the magnetic corral. This is important in view of applications, especially in view of the demand for devices to locally produce strong superconductivity. Meanwhile, the charge density displays obvious modulations due to quantum confinement but in contrast, the spin density pattern exhibits its robustness against the corral effect. Furthermore, we explore the local density of states so as to be directly checked by experiments. We demonstrate that a magnetic corral can suppress the formation of quasi-particle bound states induced by an impurity inside the corral in the chiral d + id state while the f-wave case shows different behaviors. These results also propose a new route to make a distinction between the two competing pairing states in triangular-lattice superconductors.

  2. Registro del águila elegante (Spizaetus ornatus en la Reserva de la Biosfera sierra de Manantlán, Jalisco-Colima, México A new record for the Ornate Hawk-Eagle (Spizaetus ornatus in the Sierra Manantlán Biosphere Reserve, Jalisco-Colima, Mexico

    Directory of Open Access Journals (Sweden)

    Marcelo Aranda

    2009-04-01

    Full Text Available Se presenta un registro del águila elegante (Spizaetus ornatus en un bosque de encino-pino de la Reserva de la Biosfera Sierra de Manantlán, Jalisco-Colima, correspondiente a un individuo de 2 a 3 años de edad. Este registro es significativo ante la escasez de registros de esta especie en el occidente de México, los cuales corresponden a localidades en los estados de Nayarit (1 Colima (3, Jalisco (1 y Guerrero (1. Se considera que el águila elegante está en peligro de extinción en México (NOM-059-ECOL-2001; su presencia en esta área natural protegida da aliento para su conservación.An immature Ornate Hawk-Eagle (Spizaetus ornatus was observed and photographed while perched in pine-oak forest in the Sierra de Manantlán Biosphere Reserve, Jalisco-Colima, Mexico. From plumage characteristics we believe the eagle to be 2-3 years old. This record is significant due to the paucity of records for this species in Western Mexico: Nayarit (1 Colima (3, Jalisco (1 and Guerrero (1. The Ornate Hawk-Eagle is considered as a threatened species in Mexico, and this record from a natural protected area brings hope for its conservation.

  3. The scrub as protector of the land water resources in the Sierra de Enguera. Valencia. Spain; El matorral como protector del suelo y los recursos hidricos en la Sierra de Enguera. Valencia. Espana. Implicaciones economicas de su manejo

    Energy Technology Data Exchange (ETDEWEB)

    Cerda, A.; Gimenez-Morera, A.; Bodi, M. B.

    2009-07-01

    John Thornes found that scrubland (matorral was a key factor to control soil erosion on Mediterranean mountains. His research works inspired many scientist that researched the impact of scrubland changes and management on semiarid ecosystems. An experiment carried out on the El Teularet-Sierra de Enguera experimental station in 2004 show the erosion rates on a 30 years abandoned orchard with dense vegetation cover of Ulex parviflorus and Cistus albidus and a 20-year old fire affected Maquia with Quercus coccifera. Pistacia lentiscus and Juniperus oxycedrus. The 8 (4 at each treatment) plots (1,2,4 and 16 m{sup 2}) under 715 mm of natural rainfall contributed with low runoff, sediment concentration and soil erosion. These measurements confirm the John Thornes idea matorral is an efficient vegetation cover protection on Mediterranean ecosystems. (Author)

  4. Quaternary environments in Sierra Nevada

    OpenAIRE

    Oliva, Marc; Gómez Ortiz, Antonio; Palacios Estremera, David; Salvador Franch, Ferran; Salvà Catarineu, Monserrat

    2016-01-01

    El conocimiento relativo a la evolución ambiental cuaternaria en las montañas de la Península Ibérica ha avanzado sustancialmente en las últimas décadas. Particularmente significativos son los progresos realizados en el macizo de Sierra Nevada, en el sur peninsular. En este caso, los investigadores se han servido de registros naturales y fuentes documentales para reconstruir la dinámica ambiental desde la Última Glaciación y posterior deglaciación del macizo hasta su evolución reciente. Los c...

  5. ZOOARQUEOLOGÍA Y TAFONOMÍA DEL PERÍODO TARDÍO-INCA EN PEÑAS COLORADAS, ANTOFAGASTA DE LA SIERRA (PUNA DE CATAMARCA, ARGENTINA/Zooarchaeology and taphonomy of the Late Period-INCA in Peñas Coloradas, Antofagasta de la Sierra (Puna of Catamarca, Argentina

    Directory of Open Access Journals (Sweden)

    Jorge Guillermo Ortiz

    2012-11-01

    Full Text Available Se presenta el análisis integrado del conjunto arqueofaunístico, constituido por vertebrados e invertebrados, del sitio Peñas Coloradas 3-cumbre (PC3-c, Antofagasta de la Sierra (Catamarca, Argentina. El sitio se localiza en la cumbre de un farallón de ignimbrita y está conformado por estructuras arquitectónicas asignadas a momentos Tardíos-Incas, algunas de las cuales han sido reutilizadas hasta principios del siglo XX. Con la finalidad de complementar los datos y reconstruir la historia tafonómica de los conjuntos faunísticos, se estudió el contexto sedimentario mediante métodos físico-químicos (textura; pH; determinación de albúmina, P y MO. Los materiales analizados brindaron datos sobre algunas de las actividades realizadas en las estructuras, el consumo de animales, temporalidad, estacionalidad de las ocupaciones, y sobre los procesos diagenéticos actuantes. La integración contextual de los datos materiales analizados y del emplazamiento del sitio y sus estructuras, nos permite inferir prácticas sociales diferenciadas entre las estructuras con cubierta y sin cubierta. Las primeras, se vinculan a depósitos de alimentos y manufacturas, mientras que las segundas se asocian con  prácticas residenciales, procesamiento y consumo de alimentos. Abstract In this paper, an integrated analysis of archaeofaunal data consisting of vertebrates and invertebrates of the Peñas Coloradas 3-summit (PC3-c, Antofagasta de la Sierra (Catamarca, Argentina is conducted. The site is located at the top of an ignimbrite hill and is composed of architectural structures attributed to Late Inca times, some of which had been re-used until the early 20th century. In order to complement the data and reconstruct the taphonomic history of the faunal assemblages, we studied the sedimentary context by physicochemical methods (texture, pH, determination of albumin, P and MO. The material tested has provided data on some of the activities in the structures

  6. Differential cooling and uplift of the eastern Sierras Pampeanas (Central Argentina)

    International Nuclear Information System (INIS)

    Steenken, A; Martino, R.; Wemmer, K.; Siegesmund, S.; Drobe, M.; Lopez de Luchi, M.

    2007-01-01

    The Eastern Sierras Pampean as are constituted by the Neo proterozoic to early Cambrian basement of the Sierras de Cordoba, San Luis and eastern La Rioja (29grades 00seconds - 33grades 30seconds, 64grades 00seconds - 6 00W) outcropping in the east of the Chaco-Parana basin. High-grade metamorphic gneisses and schists dominate the basement. The intrusion of magmatic rocks took place during the Pampean, Famatinian and Achalian cycles. The basement is divided in different lithological and structural domains by N-S trending ductile shear-zones. The east-dipping compressive Los Tuneles and Guacha Corral shear-zones at the western limit of the Sierras de Cordoba are the most important with respect to the exhumation history of the Sierras. An extensive survey on the cooling history by K/Ar biotite and muscovite dating of the basement rocks of the Sierras de Cordoba and San Luis was carried out and interpreted in terms of a differential exhumation history of the different blocks. Beginning of cooling in the Sierra de San Luis is documented by large muscovite booklets from pegmatites yielding ages between 438 Ma and 448 Ma. Slow cooling rates (3grades/Ma) led to a systematic reset of the K/Ar ages in the fine-grained muscovites forming two groups between 430 Ma and 410 Ma and 410 Ma and 380 Ma resulting from the Achalian deformation in the upper Silurian-Upper Devonian. In contrast to the Upper Ordovician/-Llandoverian cooling onset in the Sierra de San Luis, large pegmatitic muscovites from the Sierras de Cordoba record late Cambrian to Early Ordovician ages between 493 Ma and 474 Ma. The limit between those age domains is marked by the Los Tuneles and Guacha Corral shear-zones accommodating the vertical displacement responsible for the different ages. Cooling ages from the shear-zone rocks at 430 Ma define the upper limit for the contraction that is related to the collision with the Cuyania Terrane to the western outboard of Gondwana

  7. Conjunto de actividades físicas recreativas para contribuir a utilizar de forma sana el tiempo libre de adolescente de 12 a 14 años del Consejo Popular Punta de la Sierra del municipio Guane

    Directory of Open Access Journals (Sweden)

    Yusniel Echevarria Hernández

    2009-12-01

    Full Text Available Este trabajo surge por la necesidad de ocupar de manera más contructiva y de forma sana el tiempo libre de los adolescentes y jóvenes del consejo popular Punta de la Sierra. En esta etapa de la vida de todos los seres humanos ocurren cambios muy significativos no solo desde el punto de vista anatomofisiologico sino también desde el punto de vista psicológico, en estas edades se reafirman los rasgos de la personalidad que tendrá el individuo en la adultes, de ahí la importancia que se le concede al trabajo educativo en esta etapa de la vida. El propósito de este trabajo es mantener a los adolescentes vinculados a la sociedad de manera sana mediante actividades físicas recreativas de manera que se desarrollen simultáneamente las cualidades y valores morales y las capacidades físicas de los participantes. Para ello se ha elaborado un conjunto de actividades físicas recreativas teniendo en cuenta las necesidades y motivaciones de los adolescentes y jóvenes en cuestión. Es importante destacar que este trabajo surge como necesidad después de realizar varias observaciones, encuestas y constatar que existe un gran numero de adolescentes que ocupan su tiempo libre en actividades delictivas, vicios, juegos ilícitos que atentan contra sus propias vidas como el tabaquismo, alcoholismo etc., de ahí la importancia que le conferimos a este trabajo investigativo.

  8. Eficacia anestésica y duración analgésica de la bupivacaína al 0.25% + morfina vs bupivacaína al 0.25% en bloqueo del plexo braquial para cirugía de miembro superior en pacientes del Hospital Vicente Corral Moscoso, Cuenca 2014

    OpenAIRE

    Espinoza Bernal, Flora Judith

    2016-01-01

    Introducción: La cirugía de miembro superior es un reto para el anestesiólogo por que amerita el dominio de técnicas de anestesia regional y manejo de complicaciones y analgesia en las primeras 48 horas. Objetivo: Comparar la eficacia anestésica entre bupivacaína al 0.25% + morfina y bupivacaína al 0.25% en bloqueo del plexo braquial para cirugía de miembro superior en el H.V.C.M, Cuenca 2014. Metodología: se diseñó un estudio clínico aleatorio simple ciego, para valorar el efecto de la...

  9. El campo jurídico del “otro derecho” en la Sierra de La Macarena. Elementos para un análisis crítico de la justicia alternativa en una zona de fuerte conflicto armado.

    Directory of Open Access Journals (Sweden)

    Nicolás Espinosa

    2009-07-01

    Full Text Available El artículo recoge los principales resultados de una investigación que, realizada en la Sierra de La Macarena (Meta, Colombia, se propuso explorar —a partir de la teoría sociológica de Pierre Bourdieu y de corrientes críticas del derecho— la configuración de un campo jurídico regional que se encuentra al margen del campo jurídico del derecho oficial. Dicho campo, el de la justicia local, integra a comunidades campesinas y a la guerrilla de las FARC en una relación dinámica que ha derivado en la instauración de un sistema jurídico consuetudinario. El artículo expone los principales elementos teóricos y metodológicos utilizados en la investigación y se sintetizan las principales conclusiones a que dio lugar. Asimismo, se ofrece una reflexión sobre las posibilidades políticas de la justicia alternativa como estrategia y escenario para la construcción regional a partir del empoderamiento comunitario, su autonomía ante la guerrilla y su posicionamiento frente al Estado.

  10. Caracterización fenotípica, productiva y reproductiva de la cabra blanca Criolla del “Filo Mayor” de la Sierra Madre del Sur en el estado de Guerrero

    Directory of Open Access Journals (Sweden)

    Rubén Darío Martínez Rojero

    2013-01-01

    Full Text Available Con el objetivo de hacer una caracterización fenotípica y de determinar parámetros productivos y reproductivos de la cabra blanca Criolla del “Filo Mayor” en la Sierra Madre del Sur, estado de Guerrero, se llevó a cabo el presente estudio en el municipio de Leonardo Bravo a 17o 39 ́N y 99o 50 ́O y en el Colegio Superior Agropecuario del Estado de Guerrero (CSAEGRO ubicado a 14.5 km de Iguala, Gro., a 18o 15 ́ N y 99o 39 ́ O. Los colores de pelo predominantes en las cabras fueron el blanco y el bayo o crema (94.8%; la presencia de cuernos fue común en machos y hembras y sólo un 7.4% de éstas no los presentó. Las cabras presentaron ubres esféricas (52.8% y alargadas (47.2%, mientras que los machos cabríos presentaron testículos lobulares (46.2% y bipartidos (53.8%. Predominaron cabras con perfil recto y orejas erectas (90.4%. El peso de los machos cabríos adultos fue de 68.0 ± 2.1 kg, con una altura a la cruz de 78.8 ± 3.7 cm y un perímetro torácico de 88.5 ± 1.5 cm. Las cabras adultas presentaron un peso de 43.0 ± 3.2 kg, una altura a la cruz de 68.8 ± 2.7 cm y un perímetro torácico de 80.7 ± 3.4 cm. La tasa de fertilidad e índice de prolificidad fueron de 61.4% y 1.6 ± 0.12 crías por parto, respectivamente, con un 8.7% de abortos. El peso al nacimiento de los cabritos (sin considerar sexo ni tipo de parto fue de 2.9 ± 0.13 kg; en tanto que el peso a los 100 d de edad fue de 14.3 ± 1.2 kg, con ganancias diarias de peso del nacimiento al destete de 159.0 ± 0.15 g. La producción de leche por día fue de 785.0 ± 35.9 g y la curva de lactancia registró un pico en las semanas 3 y 4 (800 g para después descender en forma constante hasta la semana 14 (400 g. La duración de la gestación fue de 168.6 ± 2.21 d, con un periodo parto-primer estro de 136.3 ± 30 d. La ocurrencia de ciclos estrales menores a 17 días fue nula, con una alta proporción de ciclos de entre 17 a 25 d (55.2% y mayores de 25 d (44

  11. New structures for goat corrals to control peridomestic populations of Triatoma infestans (Hemiptera: Reduviidae in the Gran Chaco of Argentina

    Directory of Open Access Journals (Sweden)

    David Eladio Gorla

    2013-05-01

    Full Text Available Goat production is an important economic activity for rural communities in the Gran Chaco of Argentina. Goat corrals are important for the survival of peridomestic populations of Triatoma infestans. This study evaluated the impact of modifying the traditional structure of goat corrals on T. infestans populations and goat productivity in the region of Los Llanos (La Rioja. Thirty-nine experimental corrals were constructed and 57 traditional corrals were used as controls. We evaluated the infestations of the control and experimental corrals for five years following construction of the structures. The results showed that the new structures did not prevent the colonization, although it enhanced the detection of infestation at low densities of T. infestans. No significant difference was found in T. infestans population abundance between control and experimental corrals, probably because of the different detectability in the two types of structures, especially among the small nymphs. Although goat productivity average was higher in experimental than in control corrals, no significant difference was found because of high variability. The new structures can be used as a complement to promote the development of rural communities. Acceptability and adoption of the new corrals by the owners was high, as the enclosures offered better protection for the goats, increased growth of kids and facilitated herd handling.

  12. Petrographical and geochemical characterization and deformation conditions of the San Cristobal pluton, Sierra de Velasco, La Rioja, Argentina; Caracterizacion petrografica y geoquimica y condiciones de deformacion del pluton San Cristobal, Sierra de Velasco, La Rioja, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Bellos, L.I.; Toselli, A.J.; Rossi, J.N.; Grosse, P.; Rosa, J.D. de la; Castro, A.

    2010-07-01

    The San Cristobal pluton is a 35 km2 granitic body that outcrops at the southestern tip of the Sierra de Velasco, located west of La Rioja city, Argentina. It is formed by monzogranites and syenogranites, together with scarce granodiorites, with medium to fine-grained, equigranular to slightly porphyritic textures. Their mineral assemblage consists of quartz + microcline + plagioclase + biotite {+-} muscovite + zircon + apatite + magnetite. The granite contains dioritic to tonalitic mafic enclaves. The central and eastern parts of the granite have been deformed by the NNW-SSE trending South Mylonitic shear zone formed by mylonitic rocks. The metamorphic host-rock is represented by scarce greenschist facies xenoliths and hornfels with the high T/P assemblage K-feldspar - cordierite - biotite {+-} sillimanite. The granites are calc-alkaline, weak- to moderately peraluminous, and formed as part of a continental magmatic arc developed along the active margin of western Gondwana during the Early Paleozoic. The depth of emplacement of the San Cristobal pluton is estimated at {approx}12 km. (Author).

  13. Perfil de ácidos grasos en carne de toretes Europeo x Cebú finalizados en pastoreo y en corral

    Directory of Open Access Journals (Sweden)

    Maribel Montero-Lagunes

    2011-01-01

    Full Text Available El objetivo fue determinar el perfil de ácidos grasos en grasa intramuscular de toretes encastados de Europeo (Bos taurus con Cebú (Bos indicus, finalizados en pastoreo y en corral. Cincuenta y dos toretes se analizaron con un ANDEVA en un arreglo factorial 2 x 2. La mitad de los animales fueron finalizados en pastoreo , siendo el pasto estrella de África [Cynodon plectostachyus (K. Schum Pilg.] la base de la alimentación, y la otra mitad en corral alimentados con 65 % de maíz, 10 % de pasta de soya, 20 % de heno, 4 % de sebo, 1 % de urea y minerales. La mitad de cada grupo consistió de toretes con más de ¾ B. taurus, y la otra mitad mayormente ¾ B. indicus . Los toretes se sacrificaron con 500 kg de peso. Se tomaron muestras del músculo Longissimus dorsi de la región de la 12a costilla. Los lípidos se analizaron por cromatografía de gases. El ácido graso más abundante (mg/g de grasa fue el C18,1 (381±16.4 seguido por el C16,0 (250±5.3 y el C18,0 (201±8.6, El contenido de C18:2, 9-cis, 11-trans fue de 6.1±0.67. C14,0 y C16,0 fueron mayores en corral, y C18,0 fue más alto en pastoreo (P<0.01. C14,0, C16,0, C18,2, C18,3 y CLA total fueron mayores (P<0.05 en B. indicus y C18,0 fue más alto (P<0.05 en B. taurus. Se concluye que el perfil de ácidos grasos en toretes cruzados de Europeo por Cebú es diferente si es finalizado en pastoreo o en corral y por el nivel de encaste.

  14. El municipio de Pajapan en la Sierra de Santa Marta (Veracruz, México: un caso de resistencia indígena en la defensa del territorio y los recursos naturales para la sustentabilidad de los pueblos originarios del Gran Caribe.

    Directory of Open Access Journals (Sweden)

    Jesús Moreno Arriba

    2015-01-01

    Full Text Available El municipio de Pajapan, en la Sierra de Santa Marta (Veracruz, México, representa un caso paradigmático en la lucha por la defensa de las tierras comunales de las comunidades indígenas campesinas del Gran Caribe, recurriendo a distintos mecanismos de resistencia. Además, desde la implementación de metodología de investigación cualitativa, como la revisión bibliográfica y documental del tema de estudio, este trabajo ha identificado y analizado diversos proyectos de gestión de recursos naturales en el entorno geográfico de Pajapan y la Sierra de Santa Marta. Estas emergentes experiencias no gubernamentales se presentan como un posible modelo de desarrollo alternativo para intentar contribuir a mejorar la precaria situación actual (ecológica, demográfica y socioeconómica de los territorios tropicales y pueblos indígenas mesoamericanos del Gran Caribe.

  15. Estudio de la Orientación Cristalográfica Preferente del Cuarzo en el Contacto entre Gneises y Metatexitas - Diatexitas del Macizo Cerro Pelado (Sierra de Comechingones, Argentina)

    OpenAIRE

    Castellarlni, P.; Fernández Rodríguez, Carlos; Otamendi, Juan E.

    2003-01-01

    The quartz c-axis fabrics measured in the rocks of the high-grade unit of the Cerro Pelado massif (northern Sierra de Comechingones, Sierras Pampeanas, Argentina) allow to deduce a normal-sinistral sense of movement for the south-dipping shear zone separating the diatexite-metatexite domain to the north, from the gneissic terrane to the south. The crystallographic fabrics also indicate that the activity of this shear zone took place under high-T conditions. The deduced kinematics can account ...

  16. The OKE Corral : Code organisation and reconfiguration at runtime using active linking

    NARCIS (Netherlands)

    Bos, Herbert; Samwel, Bart

    2002-01-01

    The OKE Corral is an active network environment which allows third-party active code to configure an active node’s code organisation at any level, including the kernel. Using the safety properties of an open kernel environment and a simple ‘Click-like’ software model, third parties are able to load

  17. Generation of ecosystem hotspots using short-term cattle corrals in an African savanna

    Science.gov (United States)

    Many rangelands are now being managed for multiple uses, and it is increasingly important to identify livestock management practices that maximize long-term productivity, biodiversity and wildlife conservation. In sub-Saharan Africa, pastoralists and ranchers use temporary thorn-fence corrals (“boma...

  18. Corral framework: Trustworthy and fully functional data intensive parallel astronomical pipelines

    Science.gov (United States)

    Cabral, J. B.; Sánchez, B.; Beroiz, M.; Domínguez, M.; Lares, M.; Gurovich, S.; Granitto, P.

    2017-07-01

    Data processing pipelines represent an important slice of the astronomical software library that include chains of processes that transform raw data into valuable information via data reduction and analysis. In this work we present Corral, a Python framework for astronomical pipeline generation. Corral features a Model-View-Controller design pattern on top of an SQL Relational Database capable of handling: custom data models; processing stages; and communication alerts, and also provides automatic quality and structural metrics based on unit testing. The Model-View-Controller provides concept separation between the user logic and the data models, delivering at the same time multi-processing and distributed computing capabilities. Corral represents an improvement over commonly found data processing pipelines in astronomysince the design pattern eases the programmer from dealing with processing flow and parallelization issues, allowing them to focus on the specific algorithms needed for the successive data transformations and at the same time provides a broad measure of quality over the created pipeline. Corral and working examples of pipelines that use it are available to the community at https://github.com/toros-astro.

  19. Guide to Using Sierra

    Energy Technology Data Exchange (ETDEWEB)

    Shaw, Ryan Phillip [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Agelastos, Anthony Michael [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Miller, Joel D. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-03-01

    Sierra is an engineering mechanics simulation code suite supporting the Nation's Nuclear Weapons mission as well as other customers. It has explicit ties to Sandia National Labs' workfow, including geometry and meshing, design and optimization, and visualization. Dis- tinguishing strengths include "application aware" development, scalability, SQA and V&V, multiple scales, and multi-physics coupling. This document is intended to help new and existing users of Sierra as a user manual and troubleshooting guide.

  20. Guide to Using Sierra

    Energy Technology Data Exchange (ETDEWEB)

    Shaw, Ryan Phillip; Agelastos, Anthony Michael; Miller, Joel D.

    2017-04-01

    Sierra is an engineering mechanics simulation code suite supporting the Nation's Nuclear Weapons mission as well as other customers. It has explicit ties to Sandia National Labs' workfow, including geometry and meshing, design and optimization, and visualization. Dis- tinguishing strengths include "application aware" development, scalability, SQA and V&V, multiple scales, and multi-physics coupling. This document is intended to help new and existing users of Sierra as a user manual and troubleshooting guide.

  1. Descripción de la dieta del zorro gris, Pseudalopex griseus (Canidae) (Gray, 1869), en el Parque Nacional Sierra de las quijadas, San Luis, Argentina

    OpenAIRE

    Núñez, María Beatriz; Bozzolo, Liliana

    2006-01-01

    La dieta de Pseudalopex griseus (Gray, 1869) fue estudiada mediante el análisis de heces recolectadas en el Parque Nacional Sierra de las Quijadas. El parque representa un ambiente semiárido, con regímenes hídricos estacionalmente marcados. Los resultados obtenidos muestran que el ítem más abundante durante todo el año es el Orden Coleoptera (estación seca 26%; estación húmeda 31%). En la estación seca, el ítem más abundante fueron las cactáceas (12%) y en la húmeda las leguminosas (25%). Otr...

  2. Minor corral changes and adoption of good handling practices can improve the behavior and reduce cortisol release in Nellore cows.

    Science.gov (United States)

    Lima, Maria Lúcia Pereira; Negrão, João Alberto; de Paz, Claudia Cristina Paro; Grandin, Temple

    2018-03-01

    Inadequate corral facilities and improper handling are major causes of stress in beef cattle. The purpose of this study was to evaluate the effects of minor changes in the corral and adoption of good handling practices on the behavior, cortisol release, and time spent taking blood samples in Nellore cows. Minor corral changes included obstructing the cow's vision when the handler walked deep into the animal's flight zone and the elimination of bright objects, color contrasts, puddles, shadows, and darkness in the corral. Handling was improved by eliminating dogs, electric goads (prods), and yelling, as well as adopting a calm behavior. A total of 141 Nellore cows from two typical extensive livestock farms were studied. The cows were evaluated individually before and after the corral changes. Blood samples were collected in the restraint device for cortisol measurement. The minor corral changes and the adoption of good handling practices result in better results for all variables studied. The results showed differences in the interactions between treatment and ranch for chute score (P = 0.0091) and exit score (P good handling practices were effective in improving cow behavior in the chute and in reducing exit velocity, cortisol released, and the time spent taking blood samples.

  3. Green's function approach to the Kondo effect in nanosized quantum corrals

    Science.gov (United States)

    Li, Q. L.; Wang, R.; Xie, K. X.; Li, X. X.; Zheng, C.; Cao, R. X.; Miao, B. F.; Sun, L.; Wang, B. G.; Ding, H. F.

    2018-04-01

    We present a theoretical study of the Kondo effect for a magnetic atom placed inside nanocorrals using Green's function calculations. Based on the standard mapping of the Anderson impurity model to a one-dimensional chain model, we formulate a weak-coupling theory to study the Anderson impurities in a hosting bath with a surface state. With further taking into account the multiple scattering effect of the surrounding atoms, our calculations show that the Kondo resonance width of the atom placed at the center of the nanocorral can be significantly tuned by the corral size, in good agreement with recent experiments [Q. L. Li et al., Phys. Rev. B 97, 035417 (2018), 10.1103/PhysRevB.97.035417]. The method can also be applied to the atom placed at an arbitrary position inside the corral where our calculation shows that the Kondo resonance width also oscillates as the function of its separation from the corral center. The prediction is further confirmed by the low-temperature scanning tunneling microscopy studies where a one-to-one correspondence is found. The good agreement with the experiments validates the generality of the method to the system where multiadatoms are involved.

  4. Fibras, tejidos de la comunidad indígena u´wa de la Sierra Nevada del Cocuy, vigencia y transformaciones

    Directory of Open Access Journals (Sweden)

    Ángela Liliana Dotor Robayo

    2016-07-01

    Full Text Available Este artículo es parte del fomento, la reconstrucción y el mantenimiento del patrimonio de la identidad y la cultura de la comunidad indígena U’wa desde la universidad; muestra la actualidad, la vigencia y las transformaciones de las fibras textiles e indumentaria de la comunidad y su evolución. Teniendo en cuenta el contexto actual de las comunidades indígenas del país y la lucha diaria por mantener vivas sus identidades frente al conflicto y a la globalización que permean cada vez más la vida cotidiana, se muestra cómo con frecuencia esta confrontación termina en el abandono o cesión de sus costumbres ancestrales por unas populares. Para el desarrollo del proyecto se hizo un acercamiento y visitas al resguardo de U´wa del norte de Boyacá, se interactuó con sus integrantes y se hizo un inventario de la producción de tejidos, fibras e indumentaria de la comunidad.

  5. Caracterización petrográfica y geoquímica y condiciones de deformación del plutón San Cristóbal, Sierra de Velasco (La Rioja, Argentina

    Directory of Open Access Journals (Sweden)

    Bellos, L. I.

    2010-12-01

    Full Text Available The San Cristóbal pluton is a 35 km2 granitic body that outcrops at the southestern tip of the Sierra de Velasco, located west of La Rioja city, Argentina. It is formed by monzogranites and syenogranites, together with scarce granodiorites, with medium to fine-grained, equigranular to slightly porphyritic textures. Their mineral assemblage consists of quartz + microcline + plagioclase + biotite ± muscovite + zircon + apatite + magnetite. The granite contains dioritic to tonalitic mafic enclaves. The central and eastern parts of the granite have been deformed by the NNW-SSE trending South Mylonitic shear zone formed by mylonitic rocks. The metamorphic host-rock is represented by scarce greenschist facies xenoliths and hornfels with the high T / P assemblage K-feldspar - cordierite - biotite ± sillimanite. The granites are calc-alkaline, weak- to moderately peraluminous, and formed as part of a continental magmatic arc developed along the active margin of western Gondwana during the Early Paleozoic. The depth of emplacement of the San Cristóbal pluton is estimated at ~12 km.

    El plutón San Cristóbal constituye un cuerpo granítico de 35 km2 que aflora en el extremo sudeste de la Sierra de Velasco, situada al oeste de la ciudad de La Rioja, Argentina. Está formado por monzogranitos y sienogranitos con escasas granodioritas, de texturas equigranulares de grano medio a fino a ligeramente porfíricas. La asociación mineral es cuarzo + microclino + plagioclasa + biotita ± moscovita + circón + apatito + magnetita. Contiene enclaves magmáticos máficos de composición diorítica a tonalítica. El granito fue afectado en su parte media y este por una zona de cizalla, formada por milonitas que integran la Faja Milonítica Sur, de rumbo NNO-SSE. La roca de caja se reconoce por xenolitos de esquistos y cuarcitas en facies esquistos verdes, y septos de corneanas con la paragénesis feldespato potásico cordierita

  6. El pH de la carne de cobayo (Cavia porcellus procedente del manejo deficiente del bienestar animal durante el sacrificio en la sierra central del Perú.

    Directory of Open Access Journals (Sweden)

    LUCAS JR

    2017-09-01

    Full Text Available En la región andina del Perú es común observar el sacrificio de los cobayos sin aturdimiento ni descanso ante mortem. El objetivo del presente estudio fue evaluar el pH de la carne de cobayo (Cavia porcellus resultante de este manejo. Se evaluó el pH de 60 canales a las 0, 1, 6, 12, y 24 h posteriores al sacrificio sin descanso ante mortem ni aturdimiento. El pH fue de 6.79 ± 0.3, 6.74 ± 0.34, 6.59 ± 0.28, 6.45 ± 0.35 y 5.96 ± 0.11, a la 0, 1, 6, 12 y 24 horas post sacrificio respectivamente. La ecuación que representa la evolución del pH fue Y=6.7765-0.0231X-0.0005X2 (R2=0.996. SUMMARY. The pH of guinea pig (Cavia porcellus meat from the welfare-deficient slaughtering in the Peruvian central Andes. In Andean region of Peru is common to slaughter Guinea pig without lairage and stunning. The aim of this study was to evaluate the pH of meat of Guinea pig (Cavia porcellus from the unsuitable welfare practices during slaughtering in the Peruvian central Andes. The pH of 60 guinea pig carcasses were analyzed at 0, 1, 6, 12 and 24 hours after the end of the slaughter process. The pH was 6.79 ± 0.3, 6.74 ± 0.34, 6.59 ± 0.28, 6.45 ± 0.35 and 5.96 ± 0.11 for 0, 1, 6, 12 y 24 h post slaughtering. The equation that graphs pH evolution was Y=6.7765-0.0231X-0.0005X2 (R2=0.996.

  7. Sierra Leone Journal of Biomedical Research

    African Journals Online (AJOL)

    MHRL

    Sierra Leone Journal of Biomedical Research. (A publication of the College of Medicine and Allied Health Sciences, University of Sierra Leone). ©Sierra Leone Journal .... was used to. She seemed to have had a change of mind after ingesting.

  8. Sierra Structural Dynamics Theory Manual

    Energy Technology Data Exchange (ETDEWEB)

    Reese, Garth M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-10-19

    Sierra/SD provides a massively parallel implementation of structural dynamics finite element analysis, required for high fidelity, validated models used in modal, vibration, static and shock analysis of structural systems. This manual describes the theory behind many of the constructs in Sierra/SD. For a more detailed description of how to use Sierra/SD , we refer the reader to Sierra/SD, User's Notes . Many of the constructs in Sierra/SD are pulled directly from published material. Where possible, these materials are referenced herein. However, certain functions in Sierra/SD are specific to our implementation. We try to be far more complete in those areas. The theory manual was developed from several sources including general notes, a programmer notes manual, the user's notes and of course the material in the open literature. This page intentionally left blank.

  9. Características de uso de plaguicidas químicos y riesgos para la salud en agricultores de la sierra central del Perú

    OpenAIRE

    Ymelda Montoro; Rocío Moreno; Luis Gomero; Maria Reyes

    2009-01-01

    Con el objetivo de conocer las características sobre el uso e impactos en la salud de los plaguicidas químicos de uso agrícola en las provincias de Chupaca y Concepción en los andes centrales del Perú, se desarrolló un estudio descriptivo transversal entre abril y junio del año 2005, por medio de un cuestionario aplicado a 435 agricultores. Asimismo, se exploró la ubicación de los centros de expendio y la frecuencia de ventas de productos, además, se evaluó los casos de intoxicación reportado...

  10. La evolución del piso subalpino en la Sierra de Urbión (Sistema Ibérico, norte de españa: un modelo de impacto geoecológico de actividades humanas en el Valle de Ormazal

    Directory of Open Access Journals (Sweden)

    García-Ruiz, José M.

    2016-12-01

    Full Text Available This paper is a synthesis of the landscape, geomorphic and functional evolution of the subalpine belt in the Urbión Sierra, providing a geoecological perspective of the interactions between human activity, spatial organization, geomorphological dynamics and recent land use changes. Landscape changes in the subalpine belt started at least during the Late Neolithic, with forest fires that tried to waste the forest to enable the expansion of summer grasslands favouring an incipient sheep transhumance. Fires occurred also through the Chalcolithic and the Bronze and Iron Ages, and culminated during the Middle Ages. Deforestation of the subalpine belt would be responsible for the triggering of a number of shallow landslides and soil erosion in steep slopes above 1500 m a.s.l. The crisis of the transhumance since the beginning of the 19th century reduced the livestock pressure, particularly in the second half of the 20th century, and has contributed to shrub and forest expansion, whereas the area occupied by summer grasslands has been remarkably reduced. The decreasing livestock pressure suggests that forest expansion will continue in the next future, in a favourable context of global warming and declining presence of snowpack in the subalpine belt.Este trabajo es una síntesis de la evolución paisajística, funcional y geomorfológica del piso subalpino de la Sierra de Urbión, proporcionando una perspectiva geoecológica de las interacciones entre actividades humanas, organización del espacio, dinámica geomorfológica y transformaciones recientes en los usos del suelo. Los cambios paisajísticos del piso subalpino en la Sierra de Urbión se iniciaron al menos en el Neolítico tardío con incendios que procuraban eliminar el bosque para permitir la expansión de los pastos de aprovechamiento estival y así favorecer una incipiente trashumancia de ganado lanar. Los incendios se prolongaron a lo largo del Calcolítico y las edades del Bronce y del

  11. The dam in Garganta del Ciervo, 12th century (Segura de la Sierra, Jaén, España: contributions to Andalusian hydraulic engineering | La presa de la Garganta del Ciervo, s. XII (Segura de la Sierra, Jaén, España: aportaciones a la ingeniería hidráulica andalusí

    Directory of Open Access Journals (Sweden)

    Vicente Salvatierra Cuenca

    2016-12-01

    Full Text Available In this text we analyze a remarkable Islamic dam located in Sierra de Segura, dated from the 12th century. The size of the dam, 11 m high and 9 m thick, its location in a mostly flat area, the technique used to build it, the reservoir that it created, etc. makes dams a very singular element among the irrigation architecture in Al-Andalus. In addition to describing the dam, we also intend to discuss to which point the purpose of this structure was truly different from what was usually done at that time, and, therefore, if it means both a technological and social change, or if its configuration hid other objectives. | En este texto analizamos una notable presa islámica localizada en la Sierra de Segura, fechada en el siglo XII. Su envergadura, 11 m de altura y 9 m de grosor, su situación en una zona sustancialmente llana, su técnica de fabricación, el pantano que generaba, etc. la convierten en principio en un elemento muy atípico dentro de la arquitectura de regadío andalusí. Además de realizar su descripción, nos proponemos discutir hasta qué punto la finalidad de esta estructura era realmente diferente a lo que se hacía en la época, y si supone por tanto un cambio tecnológico y social. O si su configuración escondía otros objetivos.

  12. Application of geophysical methods to gold prospecting in Minas de Corrales, Uruguay

    International Nuclear Information System (INIS)

    Costa, Antonio Flavio U.; Dias, Rogerio Aguirre; Barcelos, Andre B.B. de

    1993-01-01

    Geophysical methods were tested in San Gregorio gold mine, Minas de Corrales, north region of Uruguay. The ores are mainly stockworks, sheeted veinlet zones, ore shoot and disseminated sulfides types, situated in a silicated and carbonated shear zone structure, over granitic mylonites, quartz diorites, quartz-feldspathic breccia, basic rocks and quartz veins. Magnetic and radiometric methods were applied . VLF and EM34-3 detected the high resistivity silicated and carbonated zone and IP detected a weak PFE anomaly associated with pyrite/gold zone. (author)

  13. Características de uso de plaguicidas químicos y riesgos para la salud en agricultores de la sierra central del Perú

    Directory of Open Access Journals (Sweden)

    Ymelda Montoro

    2009-10-01

    Full Text Available Con el objetivo de conocer las características sobre el uso e impactos en la salud de los plaguicidas químicos de uso agrícola en las provincias de Chupaca y Concepción en los andes centrales del Perú, se desarrolló un estudio descriptivo transversal entre abril y junio del año 2005, por medio de un cuestionario aplicado a 435 agricultores. Asimismo, se exploró la ubicación de los centros de expendio y la frecuencia de ventas de productos, además, se evaluó los casos de intoxicación reportados en ambas provincias. Los agricultores no cuentan con ropa de protección y manipulan directamente los plaguicidas durante su preparación y aplicación; asimismo, muchas veces no toman medidas preventivas a pesar de conocer los riesgos relacionados. El comercio de los plaguicidas se ubica en los centros urbanos, cerca de restaurantes y tiendas de abarrotes, además, los plaguicidas más vendidos pertenecen a las categorías extremadamente y altamente peligrosos, tales como Tamaron® y Furadan®, esto representa un peligro para la salud de los agricultores. Los casos de intoxicación por estos productos en las provincias bajo estudio, se han incrementado entre los años 2001 a 2004.

  14. PRESENCIA DEL HG TOTAL EN UNA RELACIÓN SUELO-PLANTA-ATMÓSFERA AL SUR DE LA SIERRA GORDA DE QUERÉTARO, MÉXICO

    Directory of Open Access Journals (Sweden)

    Gilberto Hernández-Silva

    2012-01-01

    Full Text Available La región minera de San Joaquín, Querétaro, México, tiene un historial de más de dos mil años de explotación. En ella se identificaron cuatro áreas con contenidos de Hg en suelos por arriba de lo permitido por la NOM y la WHO: Azogues y Ranas- San Joaquín (>300 mg kg-1 y Calabacillas-Santa Rita y La Lana (30.1-300 mg kg-1. Los suelos de estas áreas proporcionan al maíz (Zea mays, cantidades significativas de Hg total a través de mecanismos de traslocación (0.2-8.7 mg kg-1 en raíces y 0.2- 8.2 mg kg-1 en tallo y hoja; en grano, las cantidades oscilan entre 0.04-0.87 mg kg-1 (0.5 mg kg-1 es el máximo permitido. En la fracción insoluble del agua de lluvia, la concentración promedio fue de 67.47 μg L-1; en la fracción soluble se tuvo un promedio de 36.49 μg L-1. El promedio diario de vapor de Hg fue de 67 ng m-3 durante los 38 días de lectura, con un intervalo de 40 a 100 ng m-3, lo que demuestra una gran diferencia en la cantidad de volatilización del Hg. Los suelos, sedimentos y terreros de cinabrio, constituyen la fuente que provee de Hg al maíz a través de mecanismos de traslocación y material particulado hacia la atmósfera arrastrado por el viento y redepositado a sotavento. Las lecturas que se obtuvieron de vapor de Hg resultaron más altas de lo recomendable. Los resultados obtenidos en el sistema estudiado, denotan concentraciones por arriba del límite permisible. La población de San Joaquín está expuesta a una concentración de mercurio que es variable y por arriba de lo permitido, lo que puede tener serias consecuencias en la salud humana y el posible impacto en el medio ambiente.

  15. Caracterización y consecuencias de un deslizamiento en un área marginal del Pirineo oriental (Cava, Sierra de Cadí, Enero de 1997

    Directory of Open Access Journals (Sweden)

    Molina, David

    1997-12-01

    Full Text Available The rain which took place between November 1996 and January 1997 caused a landslide in the surrounding area of the village of Cava, placed in the basin of the river Segre (Catalan Prepyrenees. The litology and structure of the mobilized materials, and the agrarian works and its further abandonment, as well, have been fundamental features causing the aforementioned erosive process. The study of this phenomena has highlighted the existence of two different parts: a rotational movement in a hillside's sector and a mud flow. The analysis of the space-time cause's of these processes, its inter-relation with similar ones, and its influence on the human activities, constitute an essential feature in order to define planification and prevention strategies.

    [es] Las precipitaciones acaecidas entre noviembre de 1996 y enero de 1997 dieron lugar a un deslizamiento de tierras en las inmediaciones del pueblo de Cava, situado en la cuenca del río Segre (Prepirineo Catalán. La litología y la estructura de los materiales movilizados, así como las prácticas de conservación agrícola y su posterior abandono, han sido fundamentales en el desencadenamiento de este proceso erosivo. El estudio del fenómeno ha puesto de relieve dos partes diferenciadas: un movimiento rotacional en un sector de la ladera y una colada de barro originada por los materiales acumulados en la cabecera del torrente por el cual discurrió posteriormente. El análisis de las causas espacio-temporales de estos procesos y su interrelación con otros parecidos, así como la incidencia en las actividades humanas, son un factor esencial para definir estrategias de planificación y prevención.
    [fr] Les pluies ayant eu lieu entre novembre 1996 et janvier 1997 ont provoqué un glissement de terres aux alentours du village de Cava, situé dans le bassin de la rivière Segre (Prepyrenées de Catalogne. La lithologie et la structure des matériaux mobilisés, ainsi que les m

  16. African Journals Online: Sierra Leone

    African Journals Online (AJOL)

    Sierra Leone Journal of Biomedical Research. The Sierra Leone Journal of Biomedical Research publishes papers in all fields of Medicine and Allied Health Sciences including Basic Medical Sciences, Clinical Sciences, Dental Sciences, Behavioural Sciences, Biomedical Engineering, Molecular Biology, Pharmaceutical ...

  17. Ordenación y gestión del patrimonio cultural y el paisaje. La experiencia del Plan Especial de la Sierra de los Molinos en Campo de Criptana

    Directory of Open Access Journals (Sweden)

    Rafael Mata Olmo

    2008-01-01

    su entorno. Para ello se ha redactado un instrumento urbanístico (Plan Especial, que aporta una aproximación al entorno patrimonial abierta al concepto territorial de paisaje. En este sentido,el Plan converge con los postulados del Convenio Europeo del Paisaje sobre la necesidad de aplicar políticas en materia de paisaje que establezcan instrumentos de intervención destinados a la protección, gestión y ordenación del paisaje.

  18. RESILIENCIA Y CAMBIOS DEL SISTEMA PRODUCTIVO EN LA AGRICULTURA FAMILIAR DE LA NUEVA RURALIDAD EUROPEA: el caso del queso de oveja en la Sierra de Cádiz (España

    Directory of Open Access Journals (Sweden)

    Ignacio López Moreno

    2015-12-01

    Full Text Available This article analyzes the strategies resulting in the production of family farming systems in response to imbalances generated by formal regulatory changes. The research methodology was based on ethnography, following techniques features interviews and participant observation fieldwork in social anthropology. This strategy essentially qualitative, allowed us to analyze the consequences of transitions households own products and traditional farming systems, the economics of quality that characterizes the New European Rurality has had a special development in Spain for the strong implementation European Initiatives LEADER I, II and + from 1991. To this end, and based on a complex and systemic perspective, we study different production systems of farming families Cheesecake Sierra de Cádiz, this perspective to analyze the changes that led to generate two different but complementary models: the artisanal and industrial. Our work demonstrates the resilience of family economies of traditional cheesemakers producers, who continue to coexist with new industrial producers in the competitive market for quality food products. The persistence of some and the appearance of others, demonstrates the resilience of rural economies to the new challenges of globalization and the complexity of the new rurality.

  19. El sitio Bajo del Coypar II: Las evidencias más tempranas (CA. 1000 AP del proceso agropastoril en la Puna Meridional Argentina (Antofagasta de la Sierra, Catamarca

    Directory of Open Access Journals (Sweden)

    Silvina Vigliani

    2005-01-01

    Full Text Available El sitio Bajo del Coypar II (BC II es un conjunto de estructuras de pequeñas dimensiones ubicado sobre una saliente de la ladera de los cerros del Coypar, frente y alrededor del cual se distribuye una gran superficie de campos de cultivo prehispánicos, (Bajo del Coypar I de aproximadamente 1000 ha. En un trabajo anterior se postuló que este amplio sistema de producción agrícola se originó hacia el final del proceso regional tardío (ca. 1300 AP en asociación con el crecimiento del principal centro habitacional de la región, La Alumbrera (Olivera et.al, 1994 y que luego fue apropiado y ampliado por el Incario. En el presente trabajo se plantean tres objetivos generales: conocer el tipo de actividades que se realizaban en el conjunto de estructuras de BC II, establecer la asociación que había entre este conjunto de estructuras y el sistema de producción agrícola e identificar posibles cambios en el uso del espacio a lo largo del tiempo. En un principio se pensó que Bajo del Coypar II formaba parte de la ampliación del espacio productivo implementada por el Imperio Incaico. Las investigaciones llevadas a cabo en el mismo permitieron determinar que efectivamente hacia las etapas más tardías y en asociación con el Incario había una estrecha relación con el sector agrícola, evidenciado en una alta frecuencia de vasijas para el almacenaje y/o el procesamiento de sustancias secas. Sin embargo, también revelaron ocupaciones más tempranas vinculadas a grupos o unidades domésticas con un desarrollo creciente de las prácticas agrícolas. De este modo, la actividad agro-pastoril fue, en este sector de la Puna meridional, mucho más temprana de lo que pensábamos.

  20. El aprovechamiento tradicional de la dehesa boyal en un área de montaña del centro de España. Puebla de la Sierra (Madrid

    Directory of Open Access Journals (Sweden)

    Martín Jiménez, Eva

    2003-09-01

    Full Text Available The traditional management of an open wood for the feeding of ploughing cattle (dehesa boyal, located in a mountain area of Central Spain, was studied. The study area is situated in Puebla de la Sierra (Madrid. The dehesa has 336 ha and is strategically situated between the communal lands of the higher slopes and the village. The main tree species is melojo oak (Quercus pyrenaica with other less frequent species interesting from a conservation point of view like sessile oak (Quercus petraea. The management rules in the dehesa originated in medieval times, with two main types of wood management: the coppice and the open wood pasture (monte hueco. The dehesa of La Puebla was mostly used as an open wood pasture until the 20th century. Characteristics of the traditional management of the dehesa have been recreated through interviews to the old inhabitants of the village. The seasonal grazing by cows, sheep and goats is described for different parts of the dehesa. Lopping for the different tree species and the rules that regulated them are described. Also are discussed the effects of traditional management on the structure and composition of the dehesa wood. Finally, the importance of the woodland traditional management for nature conservation is analysed. The utility of the management rules studied, which does not change a large quantity of the forest characteristics (large trees, diversity, heterogeneity, etc., is pointed out. Also is highlighted to integrate the traditional management for local people, scientific support for the improvement of the nature conservation methods and the cultural and educational programs in the planning of this highly interesting nature reserve.

    [es] Se ha estudiado la gestión tradicional de una dehesa boyal localizada en un área montañosa del centro de España, en el municipio madrileño de Puebla de la Sierra, y sus efectos sobres las caracter

  1. Sierra Nevada Subregional Boundary - Sierra Nevada Conservancy [ds542

    Data.gov (United States)

    California Natural Resource Agency — Sierra Nevada Conservancy (SNC) boundary. The boundary was mapped to correspond with statute AB 2600 (2004) and as re-defined in AB 1201 (2005). Work on the boundary...

  2. Origen de arcillas alumínicas en horizontes de alteración de materiales graníticos del borde sur de la sierra de Guadarrama

    Directory of Open Access Journals (Sweden)

    Martín Patino, M. T.

    1988-08-01

    cristalizada. El estudio de la microfábrica muestra la presencia de albitas alteradas con superficies limpias y beidellita de neoformación en cualquier zona de la muestra sin ningún tipo de relación espacial con la albita. En la alteración edafoquímica de la albita, el sodio de este silicato se intercambiaría con protones procedentes de la fase acuosa, con una cinética muy rápida. Esta alcalinización inicial daría lugar a un aumento en la solubilidad de la sílice liberada a partir de la red de las albitas. En aquellos microambientes en los que se produce un prolongado contacto entre la solución de alteración y la albita, la primera puede enriquecerse suficientemente en sílice y alúmina como para alcanzar la precipitación de beidellita o haloisita-7Ǻ. Las variaciones en las condiciones microclimáticas del medio de alteración deben producir fluctuaciones en las actividades de sílice y alúmina, con cambios de pH suficientes como para dar Jugar a la neoformación de beidellita cuando las actividades de sílice sean elevadas y, de haloisita-7Ǻ en caso contrario.

  3. Scanning tunneling microscopic images and scanning tunneling spectra for coupled rectangular quantum corrals

    International Nuclear Information System (INIS)

    Mitsuoka, Shigenori; Tamura, Akira

    2011-01-01

    Assuming that an electron confined by double δ-function barriers lies in a quasi-stationary state, we derived eigenstates and eigenenergies of the electron. Such an electron has a complex eigenenergy, and the imaginary part naturally leads to the lifetime of the electron associated with tunneling through barriers. We applied this point of view to the electron confined in a rectangular quantum corral (QC) on a noble metal surface, and obtained scanning tunneling microscopic images and a scanning tunneling spectrum consistent with experimental ones. We investigated the electron states confined in coupled QCs and obtained the coupled states constructed with bonding and anti-bonding states. Using those energy levels and wavefunctions we specified scanning tunneling microscope (STM) images and scanning tunneling spectra (STS) for the doubly and triply coupled QCs. In addition we pointed out the feature of resonant electron states associated with the same QCs at both ends of the triply coupled QCs.

  4. Polycyclic aromatic hydrocarbons in sediments and mussels of Corral Bay, south central Chile.

    Science.gov (United States)

    Palma-Fleming, Hernan; P, Adalberto J Asencio; Gutierrez, Elena

    2004-03-01

    PAHs were measured in sediments and mussels (Mytilus chilensis) from Carboneros and Puerto Claro, located in Corral Bay, Valdivia. According to the ratio of phenanthrene/anthracene and fluoranthene/pyrene concentrations, these sites are medium polluted with PAHs originating mainly from pyrolytic sources. Fluoranthene was the major component measured in mussels (3.1-390 ng g(-1) dry weight) and sediments (6.9-74.1 ng g(-1) dry weight). In general, mussels were mainly exposed to the dissolved fraction of the lower molecular weight PAHs (tri- and tetra-aromatics) while the higher molecular ring systems (penta- and hexa-aromatics) were more bioavailable to sediments. Mussel PAHs content was relatively constant, with the exception of the 1999 summer season (March), when higher concentration values were found in both sites; however, PAHs residues in sediments showed a temporal variation.

  5. The spatial module as environmental conditioning element: the Spanish pavilion by Corrales and Molezun

    Directory of Open Access Journals (Sweden)

    R. Suárez

    2017-06-01

    Full Text Available In the 50s a review of Modern Movement, which assimilates modular serialization and a connection with the environmental context, although with remote premises of the contemporary paradigms of sustainability arise. In this context, within national stage, stands out the Spanish pavilion at the Brussels International Exhibition in 1958 by Corrales and Molezún. This work seeks a quantitatively reveal of the environmental performance of the pavilion in its two locations and settings, in Brussels and Madrid, through simulation and analysis of energy and lighting models which reproduces the characteristic of the pavilion with the purpose of contributing to give a new critical point of view, valuing the module efficiency to adapt to different environmental conditions. The completed analysis reveals the influence of the climate, compactness and orientation, as in the difficulties associated with thermal comfort and natural light when glazing percentage are important and there are high solar radiation settings.

  6. Evaluating the PV potential of Miraflores de la Sierra (Madrid) via geographic information technologies; Evaluación del potencial fotovoltaico de Miraflores de la Sierra (Madrid) mediante tecnologías de la información geográfica

    Energy Technology Data Exchange (ETDEWEB)

    Martín Ávila, A.M.; Domínguez Bravo, J.; Amador Guerra, J.

    2016-07-01

    The study of the PV potential in Miraflores de la Sierra forms part of the development of strategies to promote renewables-based distributed generation. The importance of residents and their urban environment in the change of energy model is taking on a new role, as both consumer and energy producer. Facilitating this transition towards a new model, demonstrating the huge possibilities of this new agent, is one of the basic objectives of this article. (Author)

  7. Características petrográficas y geoquímicas de la Tonalita La Ovejería, borde oriental de la Sierra del Aconquija, Tafí del Valle, Tucumán: integración con la Granodiorita El Infiernillo

    Directory of Open Access Journals (Sweden)

    Castro, Antonio

    2011-12-01

    Full Text Available The La Ovejería Tonalite is a N-S elo ngated body that crops out on the eastern side of the Sierra del Aconquija, west of of Tafi del Valle, Tucumán Province, Argentina. It is located just south of thelarger, and probably genetically related, El Infiernillo Granodiorite. The studied pluton has a zoning determined by different grain sizes and mineralogies: the northern outcrops are medium-grained and composed of plagioclase, quartz scarce microcline, and biotite and pistacite (± tourmaline as major accessories; the southern part of the intrusive is fine grained and composed of plagioclase, quartz scarce microcline, and biotite and sphene as accessory minerals. Two meter thick granitic dikes cross-cut the tonalites. The tonalite is calc-alkaline and peraluminous, with an ASI between 1.10 and 1.48. It intrudes metamorphic basement rocks composed of low grade schists that are characterized by an increase in static metamorphism, by syntectonic intrusions and by the intensity of flow folds.The emplacement of the La Ovejería Tonalite probably occurred during the Lower Paleozoic and was structurally controlled by the Tafi Megafracture, like the other intrusive bodies of the area. The El Infiernillo intrusive is composed of a two-mica (± tourmaline equigranular granodiorite main facies and a biotite and epidote bearing (without primary muscovite tonalitic border facies. According to field relations and petrographic, geochemical and structural data, the La Ovejería Tonalite may correspond to the northern border facies of the El Infiernillo intrusive.

  8. La participación como base del turismo comunitario y el manejo de los recursos de uso común. Sendero de Ritakuwas, Sierra Nevada de El Cocuy, Güicán y / o Chita. Boyacá, Colombia

    Directory of Open Access Journals (Sweden)

    Daniel Calderón Ramírez

    2014-11-01

    Full Text Available El objetivo principal de este estudio fue analizar el sendero que conduce al Ritakuwa Blanco, montaña de 5.330 m. s. n. m. ubicada en la Sierra Nevada de El Cocuy, Güicán y / o Chita, como un recurso de uso común (ruc. A través de este ruc se han establecido servicios turísticos y se han dado diferentes formas de participación por parte de las comunidades locales rurales, quienes lo usan y aprovechan. Por tanto, es necesaria una acción colectiva de los usuarios capaz de formular acuerdos o crear instituciones para el autogobierno y el uso sostenible del ruc, con el fin de evitar la tragedia de los bienes comunes2. Los prestadores de servicios turísticos decidieron participar en la planificación del ecoturismo debido a los estímulos y beneficios que pudieran llegar a recibir, como el fortalecimiento de la acción colectiva, la mayor autonomía y autogobierno para la sostenibilidad del sendero, la formalidad en la cadena de valor del turismo y la diversificación de los atractivos turísticos.

  9. El basamento de la sierra de San Luis: Nuevas evidencias magnéticas y sus implicancias tectónicas The basement of Sierra de San Luis: New magnetic evidence and tectonic implication

    OpenAIRE

    CJ Chernicoff; VA Ramos

    2003-01-01

    Los mapas aeromagnéticos disponibles de las sierras de San Luis y Comechingones en el sector sudoriental de las Sierras Pampeanas de Argentina, permiten examinar las características geológicas y estructurales de las unidades metamórficas e intrusivas del basamento de la región. A través de la aplicación del filtro de continuación ascendente a los datos del campo magnético total reducido al polo, se ha podido observar la configuración profunda de las distintas unidades. Entre ellas se destaca ...

  10. Modeling interfacial fracture in Sierra.

    Energy Technology Data Exchange (ETDEWEB)

    Brown, Arthur A.; Ohashi, Yuki; Lu, Wei-Yang; Nelson, Stacy A. C.; Foulk, James W.,; Reedy, Earl David,; Austin, Kevin N.; Margolis, Stephen B.

    2013-09-01

    This report summarizes computational efforts to model interfacial fracture using cohesive zone models in the SIERRA/SolidMechanics (SIERRA/SM) finite element code. Cohesive surface elements were used to model crack initiation and propagation along predefined paths. Mesh convergence was observed with SIERRA/SM for numerous geometries. As the funding for this project came from the Advanced Simulation and Computing Verification and Validation (ASC V&V) focus area, considerable effort was spent performing verification and validation. Code verification was performed to compare code predictions to analytical solutions for simple three-element simulations as well as a higher-fidelity simulation of a double-cantilever beam. Parameter identification was conducted with Dakota using experimental results on asymmetric double-cantilever beam (ADCB) and end-notched-flexure (ENF) experiments conducted under Campaign-6 funding. Discretization convergence studies were also performed with respect to mesh size and time step and an optimization study was completed for mode II delamination using the ENF geometry. Throughout this verification process, numerous SIERRA/SM bugs were found and reported, all of which have been fixed, leading to over a 10-fold increase in convergence rates. Finally, mixed-mode flexure experiments were performed for validation. One of the unexplained issues encountered was material property variability for ostensibly the same composite material. Since the variability is not fully understood, it is difficult to accurately assess uncertainty when performing predictions.

  11. Corralling Conflict: The Politics of Australian Federal Heritage Legislation Since the 1970s

    Directory of Open Access Journals (Sweden)

    Paul Ashton

    2006-05-01

    Full Text Available In August 1968, conservative National Party leader Joh Bjelke-Petersen became Premier of the state of Queensland. He referred to conservationists as these 'subversives, these friends of the dirt'. A generation later, few if any Australian politicians would have publicly attacked the environment and its supporters for fear of electoral damage. After years of major environmental battles which on occasion determined the fate of some governments, the environment had crashed through into mainstream politics. Natural and cultural heritage was firmly on local, state and federal political agendas. Heritage in Australia was also, by the 1990s, a substantial, multifaceted industry. Cultural and eco tourism generated a significant proportion of the country's gross domestic product. Along side and partially in response to industry, a heritage bureaucracy had developed. The corporatisation of heritage saw the rise in the 1980s and 1990s of a new generation of heritage professionals who attempted with varying degrees of success to place heritage assessment on a quasi-scientific footing. Perhaps their greatest achievement, in terms of cultural heritage, was gaining recognition in the 1990s for the vital importance of intangible heritage. Intangible heritage, or social value, inscribes objects and sites that cannot speak for themselves with cultural and social meanings. Since the 1980s, some more radical practitioners had been working to counteract the dominance of tangible remains of the past in determining cultural significance. This victory over empiricism, however, was in some respects to prove pyrrhic. Heritage conservation, as with some other heritage practices, was by the turn of the twenty-first century institutionally confined in its ability to represent conflict. This article charts the incorporation and corralling of heritage work at the federal level in Australia through a case study of the rise and fall of the Australian Heritage Commission.

  12. Trap and corral: a two-step approach for constructing and constraining dynamic cell contact events in differentiating progenitor cell populations

    International Nuclear Information System (INIS)

    Chen, S; Patel, N; Schaffer, D; Maharbiz, M M

    2011-01-01

    Cells are constantly subjected to a host of external signals which can influence their state, phenotype and behavior. Mammalian cells are dependent on signals from surrounding cells to maintain viability, proliferate and coordinate their actions. During developmental and regenerative processes, these lateral signals between cells provide instructive cues informing stem cells how, when and where to differentiate. Moreover, differentiating cells often experience cell–cell contact events interspersed with bouts of motility, process extension and multi-cell agglomeration (Gage 2000 Science 287 1433–8) processes which are not easily recapitulated in existing cell capture devices. Here, we present a two-step process involving microwells to trap cells with high efficiency followed by the alignment of a PDMS mesh around the cells to corral them after the trapping. The microwells trap single cells and paired cells with up to 90% and 80% efficiencies, respectively. After seeding, the PDMS mesh is aligned with the seeded wells to create a 150 µm × 150 µm corral around each trap, allowing cells to interact in a larger arena. The corralling must be done in liquid after seeding because the seeding requires high cell densities to achieve near-full occupancy in the wells. Low-density seeding of the PDMS corrals alone can result in two cells being trapped in each well, but in those conditions, the two cells often engage in very little contact or none at all (and seeding obeys a non-desirable Poisson distribution). Interestingly, trapping cells in proximity and then corralling them elicits much higher contact times than simply seeding into corrals

  13. Human papillomavirus (HPV) knowledge and prevention practices among Sierra Sur, Oaxaca college students

    OpenAIRE

    Bustamante Ramos, Gisela Mayra; Martínez-Sánchez, Abisai; Tenahua-Quitl, Inés; Jiménez, Concepción; López Mendoza, Yarely

    2016-01-01

    Introducción: El virus del papiloma humano (VPH) ocasiona la infección de transmisión sexual más importante en el mundo y se le considera como el principal agente para el desarrollo del cáncer cervicouterino. Los jóvenes constituyen la población más vulnerable debido al inicio de las  relaciones sexuales usualmente sin métodos de protección. Objetivos: Describir el conocimiento para la prevención del virus del papiloma humano en universitarios de la sierra sur, Oaxaca. Diseño: Estudio cuantit...

  14. Historical water supply to The Monastery of El Paular: a “qanat” in the Guadarrama mountain range (Madrid, Spain); Abastecimiento histórico de agua al monasterio de El Paular: un qanat en la Sierra del Guadarrama (Madrid, España)

    Energy Technology Data Exchange (ETDEWEB)

    López Vera, F.; López-Camacho, B.

    2017-09-01

    The “qanat” is an ingenious system of collecting and conducting groundwater to a supply point. Its origin dates back to 3000 years ago in the area known today as Armenia, and it had spread widely throughout Persia by 600 BC. The expansion of Islam spread this technique from China to the Iberian Peninsula, where it has received various local names. In Madrid, the technique was widely used for water supply from the ninthcentury until the mid-twentieth century, and in recent centuries received the name “Viajes de agua”. However, the geological and socio-economic environment of the Sierra de Guadarrama in Madrid is not, and has never been, appropriate for the implementation of this type of water catchment. This is why the qanat supply of the former Charterhouse of Santa María de El Paular (Rascafría), which shows a very similar typology to the “Viajes de agua”, modified or constructed in Madrid between the 17th and 19th centuries, is so original. Three “capirotes” (hoods) and a “distribution ark” have been located “in situ” in the vicinity of the Monastery and another “capirote” is used as an ornamental element in the courtyard of the old Hotel El Paular. In this paper we present the results obtained in the field study and files on this “Viaje de agua”, its context within the old Monastery supply, its water quality and various hydrological and hydraulic considerations. [Spanish] El qanat es un ingenioso sistema de captación y conducción de agua subterránea cuyo origen se sitúa en la zona conocida hoy como Armenia hace 3000 años y ampliamente difundida en Persia hacia el 600 aC. La expansión del Islam difundió esta técnica desde China a la Península Ibérica, donde ha estado muy extendida, conocida con diversos nombres locales. En Madrid, fue muy utilizada para el abastecimiento de agua desde el siglo IX hasta mediados del siglo XX, recibiendo en los últimos siglos el castizo nombre de “viaje de agua”. Sin embargo, el

  15. El patrimonio industrial minero de Corrales en Aljaraque : catalogación, propuesta de protección urbanística y modelo de difusión didáctica para la enseñanza primaria obligatoria

    OpenAIRE

    Molero de los Santos, María Elena

    2013-01-01

    Durante el año 2008, cursé los estudios en Patrimonio Histórico y Natural, a través del Màster Oficial de igual nombre con mención de calidad ANECA, ofertado por la Universidad de Huelva, La realización de estos estudios y el interés que suscitó el entorno de Corrales en Aljaraque, me llevaron a documentarme e iniciar un proceso de investigación en el que todavía hoy me encuentro inmersa. A los conocimientos adquiridos, tras la formación recibida en diferentes áreas del patrimonio, se une una...

  16. Efecto de tres abonos orgánicos: lombricomposta, bocashi y tierra de corral en un cultivo intercalado de jitomate (Solanum lycopersicon) y pepino (Cucumis sativus) bajo invernadero en el ejido El Limón, Tepalcingo, Morelos, México

    OpenAIRE

    Hernández Tapia, Alejandro; Ramírez-Rivero,Libia Aidé; Corlay-Chee, Langen; Cruz Rodríguez, Juan Antonio

    2015-01-01

    Se evaluó una intercalación de jitomate y pepino bajo condiciones de invernadero, con un diseño de bloques completos al azar, con nueve tratamientos de abono en cuatro repeticiones (Bocashi, lombricomposta y tierra de corral con tres niveles de dosificación 0.5, 1.0 y 1.5 kg/m2).Se evaluó rendimiento y,en el caso del jitomate número de frutos dañados. Se empleó un análisis de varianza (ANOVA) y pruebas de comparación de medias (Tukey α=.05). En el caso del pepino, con el tratamiento lombri...

  17. Reading Comprehension Instruction Practices in Sierra Leone

    NARCIS (Netherlands)

    Hersbach, S.; Denessen, E.J.P.G.; Droop, W.

    2014-01-01

    Aim: In this study an attempt was made to give insight in the way reading comprehension is taught in Sierra Leone. Attention was paid to the didactical strategies and the materials used during reading comprehension instruction. Methodology: Primary school teachers in Sierra Leone (N=43) were

  18. Relevamiento de vectores de la Enfermedad de Chagas en peridomicilios del área rural del Departamento Ayacucho, San Luis, Argentina

    Directory of Open Access Journals (Sweden)

    Diego I. CHARTIER

    2007-01-01

    Full Text Available Debido a la importancia de las poblaciones peridomésticas en los procesos de reinfestación de las viviendas, el objetivo de este trabajo fue evaluar la presencia de triatominos en peridomicilios de la comuna de San Francisco del Monte de Oro, Dpto. Ayacucho, San Luis, Argentina. Se evaluó la presencia de triatominos en 18 peridomicilios entre los meses de Octubre a Marzo (2003/2004, para cada anexo se analizó: tipo de construcción, hospedador y número de triatominos. Los triatominos capturados fueron determinados taxonómicamente y se analizó su infectividad. El 98,3 % de los triatominos pertenecieron a la especie Triatoma infestans (Klug. El 79,3 % de los anexos evaluados fueron positivos. Los índices de infestación para corrales y gallineros fueron de 94,4? % y 54,5? %, respectivamente. No se encontraron insectos infectados con Trypanosoma cruzi (Chagas. Los corrales se diferenciaron en: pirca, empalizada y troncos apilados horizontalmente. En cuanto al número de triatominos, sólo se halló diferencia significativa entre los corrales de pirca y empalizada, siendo el primero mayor (p< 0,05. Los corrales de pirca parecen ser los más aptos para refugios de los triatominos, probablemente debido a la gran cantidad de espacios vacíos que ofrece y a una mayor dificultad para el control químico.

  19. Structure, Quaternary history, and general geology of the Corral Canyon area, Los Angeles County, California

    Science.gov (United States)

    Yerkes, R.F.; Wentworth, Carl M.

    1965-01-01

    The Corral Canyon nuclear power plant site consists of about 305 acres near the mouth of Corral Canyon in the central Santa Monica Mountains; it is located on an east-trending segment of the Pacific Coast between Point Dume and Malibu Canyon, about 28 miles due west of Los Angeles. The Santa Monica Mountains are the southwesternmost mainland part of the Transverse Ranges province, the east-trending features of which transect the otherwise relatively uniform northwesterly trend of the geomorphic and geologic features of coastal California. The south margin of the Transverse Ranges is marked by the Santa Monica fault system, which extends eastward near the 34th parallel for at least 145 miles from near Santa Cruz Island to the San Andreas fault zone. In the central Santa Monica Mountains area the Santa Monica fault system includes the Malibu Coast fault and Malibu Coast zone of deformation on the north; from the south it includes an inferred fault--the Anacapa fault--considered to follow an east-trending topographic escarpmemt on the sea floor about 5 miles south of the Malibu Coast fault. The low-lying terrain south of the fault system, including the Los Angeles basin and the largely submerged Continental Borderland offshore, are dominated by northwest-trending structural features. The Malibu Coat zone is a wide, east-trending band of asymmetrically folded, sheared, and faulted bedrock that extends for more than 20 miles along the north margin of the Santa Monica fault system west of Santa Monica. Near the north margin of the Malibu Coast zone the north-dipping, east-trending Malibu Coast fault juxtaposes unlike, in part contemporaneous sedimentary rock sections; it is inferred to be the near-surface expression of a major crustal boundary between completely unrelated basement rocks. Comparison of contemporaneous structural features and stratigraphic sections (Late Cretaceous to middle Miocene sedimentary, rocks and middle Miocene volcanic and intrusive igneous rocks

  20. Sierra/SM theory manual.

    Energy Technology Data Exchange (ETDEWEB)

    Crane, Nathan Karl

    2013-07-01

    Presented in this document are the theoretical aspects of capabilities contained in the Sierra/SM code. This manuscript serves as an ideal starting point for understanding the theoretical foundations of the code. For a comprehensive study of these capabilities, the reader is encouraged to explore the many references to scientific articles and textbooks contained in this manual. It is important to point out that some capabilities are still in development and may not be presented in this document. Further updates to this manuscript will be made as these capabilites come closer to production level.

  1. El basamento de la sierra de San Luis: Nuevas evidencias magnéticas y sus implicancias tectónicas

    OpenAIRE

    CJ Chernicoff; VA Ramos

    2003-01-01

    Los mapas aeromagnéticos disponibles de las sierras de San Luis y Comechingones en el sector sudoriental de las Sierras Pampeanas de Argentina, permiten examinar las características geológicas y estructurales de las unidades metamórficas e intrusivas del basamento de la región. A través de la aplicación del filtro de continuación ascendente a los datos del campo magnético total reducido al polo, se ha podido observar la configuración profunda de las distintas unidades. Entre ellas se destaca ...

  2. específico en la sierra norte de Sevilla

    Directory of Open Access Journals (Sweden)

    Rafael Garzón García

    2008-01-01

    Full Text Available La primera parte del artículo ofrece una visión panorámica de la política de fomento del uso público en la Red de Espacios Naturales Protegidos de Andalucía desde su origen hasta nuestros días, con especial incidencia en cuestiones tales como el papel preponderante asumido por la figura de Parque Natural, el desequilibrio territorial de las intervenciones planteadas, o la necesaria ordenación y planificación de la actividad. Ello conforma el contexto idóneo para abordar, en segunda instancia, un análisis particularizado de la gestión del uso público en el Parque Natural Sierra Norte de Sevilla. La elección de este ámbito territorial se fundamenta tanto en sus especiales condicionantes para el fomento de esta línea de acción (privilegiada situación, existencia de una demanda tradicional asociada a determinados enclaves, propiedad de la tierra… como en la singular gestión desarrollada desde la declaración del parque, destacando las nuevas perspectivas e incertidumbres que parecen despertarse a partir del impulso y aprobación de una planificación específica

  3. Running Parallel Discrete Event Simulators on Sierra

    Energy Technology Data Exchange (ETDEWEB)

    Barnes, P. D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Jefferson, D. R. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-12-03

    In this proposal we consider porting the ROSS/Charm++ simulator and the discrete event models that run under its control so that they run on the Sierra architecture and make efficient use of the Volta GPUs.

  4. Aspen Delineation - Sierra State Parks [ds380

    Data.gov (United States)

    California Natural Resource Agency — The database represents delineations of aspen stands associated with stand assessment data (SIERRA_SP_PTS) collected in aspen stands on lands administered by the...

  5. Estructura del borde occidental de la Precordillera, en el área comprendida entre la Sierra del Tontal y el río Castaño, desde el río San Juan hasta la base del Cerro Colorado

    OpenAIRE

    Selles Martinez, José

    1991-01-01

    El estudio estructural de las unidades del Paleozoico inferior y medio del borde occidental de la Precordillera ha sido demorado durante largo tiempo debido a la complejidad de las estructuras presentes, a la superposición de al menos tres episodios deformativos y a la dificultad para identificar y separar las diferentes unidades aflorantes, muy semejantes todas en algunos tramos de su perfil. En el presente trabajo se señalan las características estructurales más importantes de las secuencia...

  6. Control del Chagas en comunidades guaraníes: conocimiento y hábitos higiénicos dentro del Proyecto de Mejoramiento de Viviendas en Bolivia

    Directory of Open Access Journals (Sweden)

    Verdú J.

    2003-01-01

    Full Text Available El objetivo fue identificar el conocimiento y control del vector (Triatoma infestans transmisor de la enfermedad de Chagas en comunidades guaraníes de Bolivia, conocido como vinchuca. Se trata de un estudio descriptivo de una serie de 98 casos mediante cuestionario semiestructurado sobre: conocimiento de la vinchuca, si produce alguna enfermedad, nombre de la enfermedad y sus consecuencias, así como las conductas de higiene: patio, vivienda, corrales. La vinchuca fue suficientemente conocida (98%, aunque sólo el 14,3% identificó el nombre de la enfermedad. Pese a ser ambientes apropiados para la proliferación de vinchucas, se limpian con poca frecuencia: el 28,6% limpia la vivienda, el 42,9% el patio y el 7,1% el corral. Se evidencia una división sexual del trabajo: mientras las mujeres limpian la vivienda y el patio, los varones limpian los corrales. La experiencia enseña el valor del proyecto de construcción de viviendas saludables y educación para la salud en la medida en que la comunidad los valora. Probablemente, las mujeres son el mejor grupo destinatario, pues realizan más tareas preventivas y no se ausentan con tanta frecuencia de la comunidad.

  7. Los recursos humanos en un espacio natural protegido: Sierra Nevada

    Directory of Open Access Journals (Sweden)

    Ma. Enriqueta Cózar

    2000-01-01

    Full Text Available Sierra Nevada, como todas las áreas de montaña españolas y gran parte del territorio interior andaluz, ha experimentado durante el siglo XX un considerable retroceso demográfico. La población con la que llega al umbral del siglo XXI es una cuarta parte más pequeña que la registrada en 1900 y un tercio inferior a la de 1950. Diversos y complejos factores, tanto internos como externos al área de montaña, de carácter más económico que demográfico, fueron los desencadenantes de una fuerte emigración. La gran pérdida de población ha originado cambios trascendentales en la demografía y en la actividad económica de Sierra Nevada. En la actualidad, la población de este espacio protegido se caracteriza por una desequilibrada distribución en el territorio, un escaso crecimiento natural, un acelerado envejecimiento y una actividad mayoritariamente terciaria. La declaración, en Julio de 1989, como espacio natural protegido bajo la figura de Parque Natural, y la más reciente de Parque Nacional, apenas ha modificado la inercia demográfica regresiva de la mayor parte de sus municipios; tan sólo se ha podido apreciar una cierta tendencia a la estabilización demográfica de la población total del macizo

  8. Searching pristine source of two gabbric plutons outcroping in Central Sierras Pampeanas Range, Argentina

    International Nuclear Information System (INIS)

    Daziano, C.; Ayala, R.

    2010-01-01

    This work is about the study of two gabbric plutons outcrop ing throughout Central Sierras Pampeanas range (Cordoba province, Argentina). San Lorenzo hill gabbric plutons is in the Upper proterozoic age whereas Cañada del Puerto belongs to the Early proterozoic.They are stock-type igneous bodies and they are intrusive s in an Upper Precambrian crystalline basement; it is mainly composed by gneisses, migmatites, schistes, marbles, amphibolite s, tact's, serpentinites and related rocks

  9. El poblado calcolítico “Venta del Rapa” (finales III milenio Cal. BC., Mancha Real, Jaén. Un recinto de fosos entre las estribaciones de Sierra Mágina y el Alto Guadalquivir

    Directory of Open Access Journals (Sweden)

    Lechuga Chica, Miguel Ángel

    2014-12-01

    Full Text Available Results are presented for the archaeological excavationa at the Copper Age settlement site “Venta del Rapa”, located during the preliminary survey for the construction of the Olivar motorway within the city limits of Mancha Real, Jaén (Spain. In its highest part, this small village had a ditch which delimited a area of 0.5 ha. Outside of the ditch there were hundreds of structures, covering some 2 ha, excavated in the geological substratum. These structures included three collective burials without grave goods dated by radiocarbon to the Middle to Later Copper Age (2350-2000 Cal. BC.Se presentan los resultados de la excavación arqueológica realizada en el poblado calcolítico “Venta del Rapa”, localizado durante las prospecciones previas a la construcción de la Autovía del Olivar en el término municipal de Mancha Real, Jaén. El poblado tiene un foso en la parte más alta que delimita un área de 0,5 ha. Tanto en su interior como en su exterior se ubican cientos de estructuras excavadas en la base geológica, abarcando 2 ha. Entre ellas destacan tres tumbas colectivas de inhumación sin ajuar, cuyas dataciones radiocarbónicas, fechan su ocupación en el Calcolítico Pleno-Final (2350-2000 Cal. BC.

  10. The Sierra de Cabral range: a restraining bend related to the Sierra Ballena shear zone in Dom Feliciano belt

    International Nuclear Information System (INIS)

    Masquelin, H.

    2010-01-01

    Restraining and releasing bends occurring in all crustal environments are common but enigmatic features of strike-slip fault systems. They can be reported in all scales of observation. Regional-scale restraining bends are sites of mountain building, transpressional deformation and basement exhumation. Releasing bends are sites of subsidence, transtensional deformation and pull-apart basins. The Dom Feliciano Belt of Southern Uruguay has two main structures observed from the outer space: (i) the Sierra Ballena Shear Zone and (ii) the Sierra de Cabral flexure located to the SW of the former. Although a transpressional regime is commonly accepted for the Dom Feliciano Belt, the available tectonic models do not provide satisfactory explanations for its building mechanism. A restraining bend is proposed at the SW termination of Sierra Ballena strike-slip ductile shear zone. In a key-area (Alvariza Range) the relationship between the Zanja del Tigre volcanic-detritic and the calcareous succession shows three en-échelon upright bends of the same quartzite hanging-wall between two sub-vertical strike-slip faults, suggesting the existence of a shortened strike-slip duplex operating in viscous-elastic rheology. The deformation partitioning includes strike-slip and dip-slip simple-shear components as well as one contractional pure-shear component. Because restraining bends were scarcely described in Neoproterozoic low-grade regional exhumation conditions, this structural framework would be a natural laboratory to study fault kinematics, fault dynamics, their associated deformation and the tectonic and erosion constraints related to the exhumation of many crystalline terrains

  11. Site fidelity of the declining amphibian Rana sierrae (Sierra Nevada yellow-legged frog)

    Science.gov (United States)

    Kathleen Matthews; Haiganoush Preisler

    2010-01-01

    From 1997 to 2006, we used mark–recapture models to estimate the site fidelity of 1250 Sierra Nevada yellow-legged frogs (Rana sierrae) in Kings Canyon National Park, California, USA, during their three main activity periods of overwintering, breeding, and feeding. To quantify site fidelity, the tendency to return to and reuse previously occupied...

  12. Eficiencia de tres atrayentes alimenticios para la captura de Rhagoletis zoqui Bush, 1966 (Díptera: Tephritidae) y caracterización del sistema de producción del nogal de castilla (Juglans regia L.) en la Sierra Nevada de Puebla.

    OpenAIRE

    Aparicio del Moral, Yahana Michelle

    2014-01-01

    La mosca de la fruta Rhagoletis zoqui Bush, 1966 (Diptera: Tephritidae), es un insecto plaga asociado al nogal de Castilla (Juglans regia L.) que ocasiona pérdidas a los productores nogaleros en la Sierra Nevada de Puebla. En los últimos años se han incrementado las poblaciones de este insecto provocando daños importantes al fruto. No se dispone de información científica sobre los aspectos básicos para el control de este insecto en la región. En este trabajo, se evaluaron 3 atrayentes alimen...

  13. Estudio de erosión hídrica en varias localizaciones de la Sierra de San Miguelito, SLP, México: Evaluación de erodibilidad de los suelos y modelado del proceso

    OpenAIRE

    Casabella González, Manuel Jesús

    2015-01-01

    El interés por la erosión hídrica que se muestra en este proyecto nace de la problemática existente en la actualidad en todos los ámbitos (civil, científico, político, ambiental, etc.) en torno a la conservación y protección de los principales recursos naturales esenciales, entre ellos el suelo, entendiendo al mismo como un sistema natural complejo y dinámico que cumple con determinados servicios ambientales indispensables para el sostenimiento tanto del ecosistema como de la vida h...

  14. Seguimiento del procedimiento diagnóstico de tuberculosis pulmonar en tosedores crónicos indígenas de la Sierra Santa Marta, Veracruz, México

    OpenAIRE

    Nazar Beutelspacher, Austreberta; Montero Mendoza, Elda; Vázquez García, Verónica

    2007-01-01

    La tuberculosis pulmonar como causa de enfermedad y muerte es un importante problema de salud pública, debido a que un gran número de personas que desarrollan tuberculosis no tienen oportunidad del diagnóstico y tratamiento oportunos. El objetivo de este estudio fue explorar la colaboración de la población tosedora para seguir el procedimiento diagnóstico establecido por la Norma Oficial Mexicana para la Prevención y Control de la Tuberculosis en la atención primaria a la salud...

  15. Comentarios a la nueva Ley Nº 14.867 que regula el engorde intensivo a corral de bovinos y bubalinos en la provincia de Buenos Aires

    OpenAIRE

    Noseda, Paula

    2017-01-01

    A fines de enero de este año 2017, entró en vigencia la Ley N° 14.867 que regula la actividad de engorde intensivo a corral de bovinos y bubalinos en la Provincia de Buenos Aires. Con este comentario se pretende evaluar las ventajas y desventajas de contar con éste nuevo régimen, considerando la normativa agroambiental marco, la posición de la doctrina y la jurisprudencia bonaerense vigente en la materia.

  16. Seguimiento del procedimiento diagnóstico de tuberculosis pulmonar en tosedores crónicos indígenas de la Sierra Santa Marta, Veracruz, México

    Directory of Open Access Journals (Sweden)

    Nazar Beutelspacher, Austreberta

    2007-01-01

    Full Text Available La tuberculosis pulmonar como causa de enfermedad y muerte es un importante problema de salud pública, debido a que un gran número de personas que desarrollan tuberculosis no tienen oportunidad del diagnóstico y tratamiento oportunos. El objetivo de este estudio fue explorar la colaboración de la población tosedora para seguir el procedimiento diagnóstico establecido por la Norma Oficial Mexicana para la Prevención y Control de la Tuberculosis en la atención primaria a la salud (NOM en poblaciones indígenas, en un contexto de elevada prevalencia de tuberculosis pulmonar, pobreza y ausencia de servicios locales de salud. Se estimó la prevalencia de tos crónica y se realizó análisis multivariado usando un modelo de regresión logística lineal para identificar algunos factores explicativos del número de muestras de expectoración entregadas. Se discuten las dificultades para establecer el diagnóstico de tuberculosis pulmonar en población indígena y se propone la necesidad de replantear las estrategias de búsqueda y diagnóstico en poblaciones de alto riesgo como la considerada en este estudio.

  17. Potential effects of surface coal mining on the hydrology of the Corral Creek area, Hanging Woman Creek coal field, southeastern Montana

    Science.gov (United States)

    McClymonds, N.E.

    1984-01-01

    The Corral Creek area of the Hanging Woman Creek coal field, 9 miles east of the Decker coal mines near the Tongue River, contains large reserves of Federal coal that have been identified for potential lease sale. A hydrologic study was conducted in the area to describe existing hydrologic systems and to study assess potential impacts of surface coal mining on local water resources. Hydrogeologic data collected indicate that aquifers are coal and sandstone beds within the Tongue River Member of the Fort Union Formation (Paleocene age) and sand and gravel in valley alluvium (Pleistocene and Holocene age). Surface-water resources are limited to a few spring-fed stock ponds in the higher parts of the area and the intermittent flow of Corral Creek near the mouth. Most of the stock ponds in the area become dry by midsummer. Mining of the Anderson coal bed would remove three stock wells and would lower the potentiometric surface within the coal and sandstone aquifers. The alluvial aquifer beneath Corral Creek and South Fork would be removed. Although mining would alter the existing hydrologic systems and remove several shallow wells, alternative ground-water supplies are available that could be developed to replace those lost by mining. (USGS)

  18. Geologic studies in the Sierra de Pena Blanca, Chihuahua, Mexico

    Science.gov (United States)

    Reyes-Cortes, Ignacio Alfonso

    The Sierra del Cuervo has been endowed with uranium mineralization, which has attracted many geological studies, and recently the author was part of a team with the goal of selecting a site of a radioactive waste repository. The first part of the work adds to the regional framework of stratigraphy and tectonics of the area. It includes the idea of a pull apart basin development, which justifies the local great thickness of the Cuervo Formation. It includes the regional structural frame work and the composite stratigraphic column of the Chihuahua Trough and the equivalent Cretaceous Mexican Sea. The general geologic features of the NE part of the Sierra del Cuervo are described, which include the folded ignimbrites and limestones in that area; the irregular large thicknesses of the Cuervo Formation; and the western vergence of the main folding within the area. Sanidine phenocrystals gave ages of 54.2 Ma and 51.8 Ma ± 2.3 Ma. This is the first time these dates have been reported in print. This age indicates a time before the folded structures which outcrop in the area, and 44 Ma is a date after the Cuervo Formation was folded. The Hidalgoan orogeny cycle affected the rocks between this lapse of time. Since then the area has been partially affected by three tensional overlapped stages, which resulted in the actual Basin and Range physiography. The jarosite related to the tectonic activity mineralization has been dated by the Ar-Ar method and yields an age of 9.8 Ma. This is the first report of a date of mineralization timing at Pena Blanca Uranium District in the Sierra del Cuervo. These are some of the frame work features that justify the allocation of a radioactive waste repository in the Sierra del Cuervo. An alluvial fan system within the Boquilla Colorada microbasin was selected as the best target for more detailed site assessment. The study also included the measurement of the alluvium thicknesses by geoelectric soundings; studies of petrography and weathered

  19. Presencia de campylobacter jejuni en aves de corral y sus manipuladores

    Directory of Open Access Journals (Sweden)

    Fabio Carmona

    1985-12-01

    Full Text Available En una granja procesadora de aves en la ciudad de Cali, donde se sacrifican 12.000 animales diarios, se escogió para buscar Campylobacter jejuni una muestra de 120 pollos tomando como base una prevalencia del 80% y empleando un muestreo sistemático para dar una mayor cobertura teniendo en cuenta que la procedencia de los animales variaba diariamente. El porcentaje de positividad en materia fecal fue de 98.33% (118/120. Con la finalidad de averiguar el grado de higiene empleado en la manipulación de las canales, se frotó la superficie de ellos antes y después de introducirle las vísceras que es sabido van dentro del pollo al llegar al consumidor; se encontró que las canales con vísceras estaban contaminadas en un 18.33% (11/60 mientras que antes de este procedimiento la contaminación tan solo fue del 8.33% (5/60. También fueron examinadas 62 personas para buscar en ellas el C. jejuni encontrhndose en 5 (8.06% la bacteria. A todas las cepas aisladas se les probó la sensibilidad a la eritromicina usando disco de 15 Ug observándose un 100% de sensibilidad a la droga.

  20. Sierra/SolidMechanics 4.46 Example Problems Manual.

    Energy Technology Data Exchange (ETDEWEB)

    Plews, Julia A.; Crane, Nathan K; de Frias, Gabriel Jose; Le, San; Littlewood, David John; Merewether, Mark Thomas; Mosby, Matthew David; Pierson, Kendall H.; Porter, Vicki L.; Shelton, Timothy; Thomas, Jesse David; Tupek, Michael R.; Veilleux, Michael

    2018-03-01

    Presented in this document are tests that exist in the Sierra/SolidMechanics example problem suite, which is a subset of the Sierra/SM regression and performance test suite. These examples showcase common and advanced code capabilities. A wide variety of other regression and verification tests exist in the Sierra/SM test suite that are not included in this manual.

  1. Sierra toolkit computational mesh conceptual model

    International Nuclear Information System (INIS)

    Baur, David G.; Edwards, Harold Carter; Cochran, William K.; Williams, Alan B.; Sjaardema, Gregory D.

    2010-01-01

    The Sierra Toolkit computational mesh is a software library intended to support massively parallel multi-physics computations on dynamically changing unstructured meshes. This domain of intended use is inherently complex due to distributed memory parallelism, parallel scalability, heterogeneity of physics, heterogeneous discretization of an unstructured mesh, and runtime adaptation of the mesh. Management of this inherent complexity begins with a conceptual analysis and modeling of this domain of intended use; i.e., development of a domain model. The Sierra Toolkit computational mesh software library is designed and implemented based upon this domain model. Software developers using, maintaining, or extending the Sierra Toolkit computational mesh library must be familiar with the concepts/domain model presented in this report.

  2. The Special Court for Sierra Leone

    DEFF Research Database (Denmark)

    Damgaard, Ciara Therése

    2004-01-01

    The focus of this article is the Special Court for Sierra Leone and the extent to which it can be said that the Special Court has already challenged, or will, in the future, challenge the tradition of impunity for gender-based crimes. In this regard, an analysis is undertaken of the Special Court......'s Statute, Rules of Procedure and Evidence and practice to date, in order to determine its treatment of gender-based crimes and whether it can be said that the Special Court for Sierra Leone challenges the tradition of impunity for gender-based crimes. Udgivelsesdato: december 2004...

  3. Active deformation in the northern Sierra de Valle Fértil, Sierras Pampeanas, Argentina

    Science.gov (United States)

    Ortiz, Gustavo; Alvarado, Patricia; Fosdick, Julie C.; Perucca, Laura; Saez, Mauro; Venerdini, Agostina

    2015-12-01

    The Western Sierras Pampeanas region in the San Juan Province is characterized by thick-skinned deformation with approximately N-S trending ranges of average heights of 2500 m and a high frequency occurrence of seismic activity. Its location to the east of the mainly thin-skinned tectonics of the Argentine Precordillera fold-and-thrust belt suggests that at 30°S, deformation is concentrated in a narrow zone involving these two morphostructural units. In this paper, we present new apatite (U-Th)/He results (AHe) across the northern part of the Sierra de Valle Fértil (around 30°S) and analyze them in a framework of thermochronologic available datasets. We found Pliocene AHe results for Carboniferous and Triassic strata in the northern Sierra de Valle Fértil consistent with the hypothesis of recent cooling and inferred erosional denudation concentrated along the northern end of this mountain range. Our analysis shows that this northern region may have evolved under different conditions than the central part of the Sierra de Valle Fértil. Previous studies have observed AHe ages consistent with Permian through Cretaceous cooling, indicating the middle part of the Sierra de Valle Fértil remained near surface before the Pampean slab subduction flattening process. Those studies also obtained ˜5 My cooling ages in the southern part of the Sierra de Valle Fértil, which are similar to our results in the northern end of the range. Taken together, these results suggest a pattern of young deformation in the northern and southern low elevation ends of the Sierra de Valle Fértil consistent with regions of high seismic activity, and Quaternary active faulting along the western-bounding thrust fault of the Sierra de Valle Fértil.

  4. DATACIONES ARQUEOMAGNÉTICAS EN LA CIUDADELA DE TEOTIHUACAN, SIERRA DE LAS NAVAJAS Y XALASCO (Archaeomagnetic Datings in the Citadel of Teotihuacan, Sierra de las Navajas, and Xalasco

    Directory of Open Access Journals (Sweden)

    Anuar Gabriel Terán Guerrero

    2016-03-01

    Full Text Available El control cronoestratigráfico es fundamental para el desarrollo del trabajo arqueológico, por ello el arqueomagnetismo se ha constituido como una gran herramienta para las dataciones. En este trabajo se muestran los resultados de dataciones arqueomagnéticas mediante la determinación de la dirección de magnetización de pisos de estuco de tres sitios de la cultura teotihuacana: Ciudadela de Teotihuacan, Sierra de las Navajas y Xalasco, Tlaxcala. Esta cultura se desarrolló en el centro de México a partir del año 1 d. C., teniendo su mayor esplendor durante los siglos IV al VI d. C. Tres etapas constructivas fueron muestreadas en la ciudadela de Teotihuacan: la preciudadela, la pirámide de Quetzalcóatl y la pirámide adosada. La Sierra de las Navajas en Hidalgo, a 50 km de Teotihuacan, era su principal proveedor de obsidiana, por lo que es de interés conocer sus periodos de ocupación. El motivo del análisis de los pisos de Xalasco, Tlaxcala, sitio de la cultura teotihuacana, es por encontrarse en la ruta de comunicación con la zona del Golfo de México. Utilizando la metodología y el programa de Pavón-Carrasco et al. (2014 se infieren intervalos de tiempo que nos permiten comprender la dinámica ocupacional de estos sitios. ENGLISH: The chronostratigraphic control is fundamental during any archaeological survey. Recent studies over the Americas showed that archaeomagnetism emerges as a great tool for absolute dating purposes. In this paper, we report new archaeomagnetic datings obtained from stucco floors belonging to three sites of Teotihuacan: the Citadel of Teotihuacan, Sierra de las Navajas and Xalasco, Tlaxcala. This culture developed in central Mexico from AD 1, having its greatest splendor during the 4th to 6th centuries AD. Three construction phases were sampled in the citadel of Teotihuacan: the pre-Citadel, the Pyramid of Quetzalcoatl and the terraced pyramid. The Sierra de la Navajas in Hidalgo, located 50 km from

  5. Aspectos Socioculturales de Migrantes Mexicanos a Estados Unidos de América. Casos de Estudio: San Isidro de Gamboa y Corral de Piedra, en el Municipio de Apaseo El Alto, Guanajuato, México

    Directory of Open Access Journals (Sweden)

    María del Pilar Longar Blanco

    2011-06-01

    Full Text Available A lo largo de la investigación, se usó la información referente al tema de la migración de mexicanos a los Estados Unidos de América E.U.A. (United States of America, USA, en el comportamiento sociocultural del migrante mexicano en Estados Unidos E. U. (United States U. S. y su retorno al lugar de origen. Se utilizó una metodología de tipo cuantitativo y cualitativo para interpretar los resultados de la Encuesta sobre Migración en la Frontera Norte de México (EMIF tanto a nivel nacional como local; específicamente para el estado de Guanajuato, se obtuvo el diagnóstico relativo a datos estadísticos del flujo migratorio de mexicanos a Estados Unidos; para la obtención de información sociodemográfica, económica, política y cultural de los individuos que se encuentran desplazándose y son interrogados en un punto localizable en el espacio y tiempo. Se llevó a cabo el análisis de los aspectos socioculturales de los migrantes temporales, a través del diseño y aplicación de un cuestionario a este grupo, en las comunidades seleccionadas como casos de estudio: San Isidro de Gamboa y Corral de Piedra, en el Municipio de Apaseo el Alto, Guanajuato; los resultados permiten conocer el comportamiento sociocultural del migrante, respecto a los tipos de organizaciones sociales prevalecientes, programas de desarrollo comunitario, prácticas políticas, sistema de cargos, costumbres de vestimenta, y formas de construcción de casas-habitación, entre otros; al retornar al lugar de origen, producto de su migración temporal a los Estados Unidos de América. Paralelamente, se observó una realidad en el campo mexicano para el período 2000-2006. Es donde prevalece la mayor crisis histórica en el medio rural y que tiene como constantes la pobreza y exclusión social. Con el incremento de migración permanente, jóvenes en su mayoría buscan la sobrevivencia.

  6. Explaining Violence in Sierra Leone's Civil War

    African Journals Online (AJOL)

    Explaining the violence of civil war is never a simple task for the scholar. In the case of the Sierra Leone, paradoxically, the task has in some ways been rendered more difficult by the sheer variety of compelling scholarship on the question. This paper seeks to identify the most useful of the explanations offered thus far, and ...

  7. Rebellion and Agrarian Tensions in Sierra Leone

    NARCIS (Netherlands)

    Peters, K.; Richards, P.

    2011-01-01

    This paper assesses the extent to which customary governance in Sierra Leone can be held responsible for an increasingly unstable two-class agrarian society. A case is made for regarding the civil war (1991–2002) as being an eruption of long-term, entrenched agrarian tensions exacerbated by chiefly

  8. Sierra Leone Journal of Biomedical Research: Submissions

    African Journals Online (AJOL)

    AFRICAN JOURNALS ONLINE (AJOL) · Journals · Advanced Search · USING ... Sierra Leone Journal of Biomedical Research (SLJBR) publishes papers in all ... An original article should give sufficient detail of experimental procedures for .... For references cited in a paper which has been accepted for publication but not ...

  9. Rice genetic resources in postwar Sierra Leone

    NARCIS (Netherlands)

    Chakanda, R.T.M.

    2009-01-01

    This research presents the effect of the 10-year long civil war in Sierra Leone on rice genetic resources, using farmers and their seed systems in three selected districts as reference points. The war disrupted all forms of production and development in the country and like other sectors of the

  10. Sierra Leone Journal of Biomedical Research

    African Journals Online (AJOL)

    The Sierra Leone Journal of Biomedical Research publishes papers in all fields of Medicine and Allied Health Sciences including Basic Medical Sciences, Clinical Sciences, Dental Sciences, Behavioural Sciences, Biomedical Engineering, Molecular Biology, Pharmaceutical Sciences, Biotechnology in relation to Medicine, ...

  11. Sierra Elvira limestone: petrophysical characteristics of an Andalusian heritage stone

    Directory of Open Access Journals (Sweden)

    Valverde, I.

    2008-06-01

    Full Text Available “Sierra Elvira stone” is one of the ornamental building stones most widely used in the historical monuments of eastern Andalusia. A Liassic age limestone, it appears in the central section of the Baetic Mountains and more specifically in the Middle Subbaetic domain. While the most common variety is a crinoid limestone, a micritic limestone of the same age has also been quarried, albeit in much smaller quantities. These stones form very thick beds, up to nearly 5 m deep, that run in consistently parallel lines and have a dip angle that facilitates quarrying.With petrographic, physical and mechanical properties that ensure stone strength and durability, it is a high quality building material suitable for both structural and ornamental purposes. These properties can be attributed to the minimal open porosity and concomitant excellent water resistance that characterize the stone, as well as to its high mechanical strength and low textural anisotropy, both elastic and mechanical. With such attributes, the stone can be successfully used for any number of purposes, including decorative stonework (portals, fountains, plinths, structural members (column shafts and bases or urban curbing and paving. Intervention on Sierra de Elvira limestone structures should be limited to cleaning or repair, for consolidating or protective materials are scantly effective.La “Piedra de Sierra Elvira” constituye una de las piedras ornamentales más significativas del Patrimonio Arquitectónico de Andalucía Oriental. Es una roca caliza del Lias que aflora en el Subbético Medio del sector central de las Cordilleras Béticas. El litotipo más explotado es una caliza con crinoides, en bastante menor importancia se ha extraído también otra caliza micrítica de la misma edad. Los bancos son muy potentes, en algunos casos de más de 5 m, con un paralelismo constante y un buzamiento que favorece su explotación en los frentes de cantera.Sus caracter

  12. Discovery of the Sierra Pintada uranium district, Mendoza Province, Argentina

    International Nuclear Information System (INIS)

    Rodrigo, F.; Belluco, A.E.

    1981-01-01

    Since 1956, uranium-bearing minerals have been known to exist in Sierra Pintada, Mendoza Province, Argentina. Based on paragenetic considerations, a first radiometric prospection was carried out, leading to the discovery of two groups of anomalies (Puesto Agua del Toro and Cuesta de los Terneros), such as vein-type deposits, with uraninite and 'yellow minerals' and one sandstone-type deposit (Puesto La Josefa), related to sediments with carbon trash. Some recent geological research and surveys in the area, and a reduced drilling programme carried out on selected anomalies, led to reinterpretation of the potential of the area. Furthermore, and as a result of an airborne radiometric prospection performed in mid-1968, numerous anomalies have been discovered. The main constellation of anomalies, along the flanks of the El Tigre Brachyanticline, occurs in sandstones of Permian age. Explored by 80 000 m of drilling, they have shown the existence of several peneconcordant lens-shaped ore bodies of economic size, with uranophane on the surface and prevailing uraninite and some brannerite, coffinite and davidite below the water table. Reserves exceed 20 000 tonnes of U 3 O 8 . A new regional programme with a 4-km drill-grid initiated in 1978 led to the discovery of new ore bodies which are at present being evaluated. The alternatives and discontinuities during the development of the district, the prospecting and exploration techniques employed, and the results achieved in the different stages of the operation are discussed in detail. This case history attempts to illustrate the developing philosophy which was successfully applied in Sierra Pintada, with emphasis on the following points: (a) the need for adequate geological knowledge of the area; (b) the advantage of a massive survey (in this case, air survey); (c) the necessity for exploration (drilling) in order to define the anomalies and make their evaluation possible; and (d) the convenience of extending exploration

  13. Respuesta hidrológica en medios semiáridos: Las cuencas experimentales de la Sierra de El Picarcho, Murcia (España)

    OpenAIRE

    Castillo Sánchez, Victor Manuel; Gómez-Plaza, A.; Martínez-Mena García, M. Dolores; Albaladejo Montoro, Juan

    2000-01-01

    [ES] Las cuencas experimentales de la Sierra del Picarcho se establecieron en 1997 para estudiar los factores que controlan la generación de escorrentía en distintas escalas de trabajo, analizar la variabilidad de estos factores y desarrollar modelos hidrológicos de simulación adaptados a estos ambientes.

  14. Prevalencia de malformaciones congénitas y factores asociados en neonatos nacidos en el Hospital Vicente Corral Moscoso, Cuenca 2010

    OpenAIRE

    Peralta Gutiérrez, María Augusta

    2011-01-01

    OBJETIVO: Determinar la prevalencia de malformaciones congénitas y factores asociados en neonatos nacidos en el Hospital Vicente Corral Moscoso (HVCM) de la ciudad de Cuenca y elaborar un plan estratégico para prevención, detección y atención de malformaciones congénitas. MATERIALES Y MÉTODO: Estudio transversal, que incluyó 2385 neonatos, fueron incluidos neonatos mayores de 20 semanas de gestación, mayores de 500 gramos, vivos o muertos. se empleó la RP (IC95%) y el chi cuadrado para sig...

  15. Alimentación temprana en pacientes aleatorizados poscolecistectomía laparascópica electiva en los Hospitales Vicente Corral Moscoso y José Carrasco Arteaga. 2013

    OpenAIRE

    Martínez Calderón, Hernán Patricio

    2014-01-01

    Objetivo: determinar los beneficios de la alimentación temprana en los pacientes sometidos a cirugía electiva de colecistectomía laparoscópica en los hospitales Vicente Corral Moscoso y José Carrasco Arteaga Metodología: se trató de unestudio de tipo experimental. La población de estudio fueron los pacientes de 18 a 60 años con indicaciones de colecistectomía laparoscópica, que acudieron al servicio de cirugía de los Hospitales Vicente Corral Moscoso y José Carrasco Arteaga, que fueron int...

  16. La tuberculosis de “Doc” Holliday en el cine. La hora de las pistolas/ Hour Of The Gun (1967 y Duelo a muerte en O.K. Corral/ “Doc” (1971

    Directory of Open Access Journals (Sweden)

    José Elías García Sánchez

    2008-10-01

    Full Text Available La hora de las pistolas (1967 de John Sturges comienza en el famoso duelo en el O.K. Corral mientras que Duelo a muerte en O.K. Corral (1971 de Frank Perry, como sus predecesoras Pasión de los fuertes (1946 y Duelo de titanes (1957 termina en él. Ambas películas muestran la tuberculosis pulmonar de “Doc” Holliday. La primera incide especialmente en sus últimos días en el sanatorio antituberculoso de Glenwood Springs y la segunda, en la que es el protagonista, con sus intensos ataques de tos.

  17. Sierra/SolidMechanics 4.48 Verification Tests Manual.

    Energy Technology Data Exchange (ETDEWEB)

    Plews, Julia A.; Crane, Nathan K; de Frias, Gabriel Jose; Le, San; Littlewood, David John; Merewether, Mark Thomas; Mosby, Matthew David; Pierson, Kendall H.; Porter, Vicki L.; Shelton, Timothy; Thomas, Jesse David; Tupek, Michael R.; Veilleux, Michael; Xavier, Patrick G.

    2018-03-01

    Presented in this document is a small portion of the tests that exist in the Sierra / SolidMechanics (Sierra / SM) verification test suite. Most of these tests are run nightly with the Sierra / SM code suite, and the results of the test are checked versus the correct analytical result. For each of the tests presented in this document, the test setup, a description of the analytic solution, and comparison of the Sierra / SM code results to the analytic solution is provided. Mesh convergence is also checked on a nightly basis for several of these tests. This document can be used to confirm that a given code capability is verified or referenced as a compilation of example problems. Additional example problems are provided in the Sierra / SM Example Problems Manual. Note, many other verification tests exist in the Sierra / SM test suite, but have not yet been included in this manual.

  18. Archaeological obsidian from La Sierra Gorda Mexico, by PIXE

    International Nuclear Information System (INIS)

    Juarez-Cossio, D.; Terreros, E.; Quiroz-Moreno, J.; Romero-Sanchez, S.; Calligaro, T.F.; Tenorio, D.; Jimenez-Reyes, M.; Los Rios, M. de

    2009-01-01

    The chemical compositions of 42 obsidian pre-Hispanic artifacts from Tancama and Purisima, both archaeological sites of La Sierra Gorda Valleys, Mexico, were analyzed by PIXE technique. These obsidians came from four sources: Sierra de Pachuca Hidalgo, Paraiso Queretaro, Ucareo Michoacan and mainly from Zacualtipan/Metzquititlan Hidalgo. According to archaeological evidences, La Sierra Gorda valleys participated in commercial exchange with other regional sites, from Classic to Post-classic periods (A.D. 300-1500).

  19. IXTLAMATKI VERSUS NAHUALLI. CHAMANISMO, NAHUALISMO Y BRUJERÍA EN LA SIERRA NEGRA DE PUEBLA

    Directory of Open Access Journals (Sweden)

    Antonella Fagetti

    2010-12-01

    Full Text Available Las características de ixtlamatki y nahualli, como agentes del bien y del mal en el imaginario de los nahuas de Tlacotepec de Díaz, Puebla, constituyen el punto de partida de la reflexión sobre las relaciones que privan entre el chamanismo, el nahualismo y la brujería, como parte del sistema simbólico-mágico-religioso implicado en la trama de la vida y la muerte. El caso de los nahuas de la Sierra Negra nos permite establecer un conjunto de homologías y diferencias entre estas tres grandes categorías y distinguir los rasgos que podrían guiar el estudio de las mismas en otros contextos culturales.   ABSTRACT The characteristics of ixtlamatki and nahualli, as agents of good and evil in the imaginary of the Nahua people from Tlacotepc de Díaz, Puebla, constitute the starting point for reflecting upon the relationships between shamanism, nahualism and witchcraft as part of the symbolic-magic-religious system in the web of life and death. The case of the Nahuas from the Sierra Negra allows us to establish a set of similarities and differences between these three major categories and to distinguish the features that can potentially guide their study in other cultural contexts.

  20. Sierra Madre Oriental in Coahuila, Mexico

    Science.gov (United States)

    2002-01-01

    This desolate landscape is part of the Sierra Madre Oriental mountain range, on the border between the Coahuila and Nuevo Leon provinces of Mexico. This image was acquired by Landsat 7's Enhanced Thematic Mapper plus (ETM+) sensor on November 28, 1999. This is a false-color composite image made using shortwave infrared, infrared, and green wavelengths. The image has also been sharpened using the sensor's panchromatic band. Image provided by the USGS EROS Data Center Satellite Systems Branch

  1. Birds of Sierra de Vallejo, Nayarit, Mexico

    OpenAIRE

    Figueroa-Esquivel, E.M.; Puebla-Olivares, F

    2014-01-01

    Sierra de Vallejo, is considered a priority region for conservation, and is strongly affected by anthropogenic pressures. The inventory of birds are refers to studies in near areas. This study is a concrete contribution of the birds of the mountain chain and north of it. We considered bibliographic records and databases available on the web with records of ocurrence and specimens of scientific collections. Also we perform point counts in different localities inside the...

  2. Groundwater quality in the Sierra Nevada, California

    Science.gov (United States)

    Fram, Miranda S.; Belitz, Kenneth

    2014-01-01

    Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project (PBP) of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to groundwater-quality information. The Sierra Nevada Regional study unit constitutes one of the study units being evaluated.

  3. Monitoring lichens diversity and climatic change in Sierra Nevada (Spain

    Directory of Open Access Journals (Sweden)

    Fernández Calzado, M.ª R.

    2013-12-01

    Full Text Available Lichens are common organisms in high mountain zones, where they play an important role in ecosystem balance. In recent years, the increasing interest in understanding more about their interactions with abiotic factors has prompted several investigations, some of which have proved their value as bioindicators of climatic conditions. In this context, focusing on climatic change effects on high mountain vascular plants and supported by the Global Observation Research Initiative in Alpine Environments project (GLORIA, we have monitored for the first time the lichens biodiversity in Sierra Nevada with the intention of studying the alterations caused by the process of climatic change. The aim of this paper is to explain the monitoring experience developed on the massif and contribute to the first results from the biodiversity and statistical analysis of the sampling data.Los líquenes son organismos comunes en las zonas de alta montaña donde juegan un importante papel en el equilibrio de los ecosistemas. En los últimos años, el creciente interés por entender más acerca de sus interacciones con los factores abióticos ha motivado diversas investigaciones, algunas de las cuales han demostrado su valor como bioindicadores de las condiciones climáticas. En este contexto, centrándonos en los efectos del cambio climático en plantas vasculares de alta montaña y respaldados por el proyecto “Iniciativa para la investigación y el seguimiento global de los ambientes alpinos (GLORIA”, se ha monitorizado por primera vez la diversidad de líquenes en Sierra Nevada con la intención de estudiar las posibles alteraciones que esta pueda sufrir causadas por el proceso de cambio climático. El objetivo de este artículo es el de dar a conocer la experiencia de seguimiento en el macizo y aportar los primeros resultados procedentes del análisis, tanto de la biodiversidad como estadístico, de los datos de muestreo.

  4. Avistamientos recientes de águila real (Aquila chrysaetos en la sierra El Mechudo, Baja California Sur, México Recent sightings of Golden Eagle (Aquila chrysaetos in the Sierra El Mechudo, Baja California Sur, Mexico

    Directory of Open Access Journals (Sweden)

    Israel Guerrero-Cárdenas

    2013-03-01

    Full Text Available Se reportan nuevos avistamientos de águila real durante 3 años consecutivos (2007-2010 en 2 localidades de la sierra El Mechudo (El Saucito y las Tarabillas, Baja California Sur. Los avistamientos, se realizaron con cámaras-trampa y por observación directa. En BCS, los registros más recientes son de la sierra de la Laguna en el 2000. Se han detectado al menos 4 individuos diferentes, entre juveniles y adultos. La importancia de estos nuevos avistamientos reside en que por primera vez se registra la presencia del águila real en cuerpos de agua dulce.We report new sightings of Golden Eagle for 3 consecutive years (2007-2010 at 2 localities of the Sierra El Mechudo (El Saucito and Tarabillas, Baja California Sur. These sightings were recorded with camera traps and by direct observation. Most recent records from BCS are for the Sierra de la Laguna in 2000. At least 4 different individuals, both juveniles and adults, have been recorded. The importance of these new sightings is that for the first time we registered Golden Eagles infresh water wetlands.

  5. Hongos asociados con el declinamiento de la manzanita Arctostaphylos pungens HBK en la Sierra Fría de Aguascalientes, México

    OpenAIRE

    Moreno-Rico, O.; Marmolejo-Monsivais, G.J.; Sánchez-Martínez, G.; Díaz-Moreno, R.; Luna-Ruíz, J.J.; Sosa-Ramírez, J.; Pérez-Hernández, K.J.; Moreno-Manzano, C.E.

    2015-01-01

    La manzanita (Arctostaphylos pungens) es un arbusto que se encuentra con regularidad en la Sierra Fría del estado de Aguascalientes, México. Este arbusto, al igual que otras plantas silvestres, es afectado por factores bióticos, como las enfermedades, que pueden causar desde daños insignificantes hasta la muerte de las plantas. Los objetivos de este trabajo fueron: 1) identificar los hongos relacionados con el declinamiento de la manzanita en la Sierra Fría de Aguascalientes y 2) conocer la i...

  6. Ceba a corral de vaquillas con ramas de eucaliptus, henos, grano de maíz y harina de girasol

    Directory of Open Access Journals (Sweden)

    A. E. Fernández

    2012-01-01

    Full Text Available Este trabajo se diseñó para evaluar dietas ante sequías, inundaciones u otras emergencias, se estudió la respuesta productiva y económica de doce vaquillas Angus en crecimiento, encerradas en un corral. Se establecieron tres tratamientos con dos repeticiones, bajo un diseño completamente aleatorizado y se replicaron en dos etapas: la primera, en el verano de 2007 y la segunda en el invierno de 2008. Las dietas estuvieron compuestas por: ramas de eucaliptus frescas (re a voluntad, heno de mijo (hm (1ª. etapa y de centeno (hc (2ª. etapa y un concentrado energético-proteico (c similar en ambas etapas y común a los tres tratamientos, compuesto por 1.6 kg ms grano de maíz (seco y molido cabeza.-1 día-1 y 0.9 kg ms harina de girasol, cabeza-1 día-1. T1: C + hm o hc a voluntad; T2: C + 3.5 kg tal cual de hm o hc + re a voluntad; T3: C + re a voluntad. La primera y segunda etapas duraron 61 y 62 días, respectivamente. Se midieron: el consumo de ms eucaliptus y henos (cms, eficiencia de conversión (efc, ganancias diarias de peso (gdp y el costo de producción de cada tratamiento (cp. Las efc, medios, fueron 7.98, 9.04 y 12.51 kg alimentos kg producido-1 y las gdp (verano fueron: 1.01, 0.83 y 0.53 e (invierno fueron: 0.95, 0.68 y 0.51 kg cab-1 día-1, respectivamente. Mientras que los cp, medios, fueron $0.79, 0.68 y 0.51 dólares/kilo producido-1, respectivamente. La inclusión de RE puede ser una alternativa posible ante emergencias climáticas.

  7. Diversidad de mamíferos de la Reserva Natural Sierra Nanchititla, México Diversity of mammals in the Natural Reserve Sierra Nanchititla, Mexico

    Directory of Open Access Journals (Sweden)

    Octavio Monroy-Vilchis

    2011-03-01

    Full Text Available La Reserva Natural Sierra Nanchititla (RNSN, por su extensión, es la segunda área natural protegida del Estado de México; sin embargo, se desconoce gran parte de su biodiversidad. El objetivo de este trabajo fue estimar su diversidad mastofaunística. Se utilizó el trampeo directo para la colecta de mamíferos pequeños y trampas-cámara para el estudio de los mamíferos medianos y grandes. Se calculó la diversidad a partir del índice de Margalef, y se evaluaron la dominancia y la equidad mediante los índices de Simpson y Shannon-Wiener, respectivamente. Se registraron 53 especies de mamíferos; 3 de ellas son el primer registro estatal, 10 son endémicas de México y 4 las considera en alguna categoría de vulnerabilidad el gobierno mexicano. En la zona habitan 5 de las 6 especies de felinos de México. La composición mastofaunística de la RNSN fue comparada con la de la sierra Purépecha, Michoacán, con la que comparte el 38% de las especies. De acuerdo con el índice de Jaccard, la similitud entre ambas es baja. Considerando los resultados, la importancia de la RNSN con respecto a su diversidad mastofaunística es evidente, así como la necesidad de delinear estrategias para su conservación.The Sierra Nanchititla Natural Reserve (SNNR is the second largest natural protected area in the State of Mexico, however its biodiversity is largely unknown. The aim of this research was to estimate its mammalian diversity. Direct trapping was used to capture small mammals and camera-trapping for the study of medium and large mammals. Diversity was calculated from Margalef's index, dominance and equity were evaluated through Simpson's and Shannon-Wiener indexes, respectively. Fifty three species were registered, 3 of them are the first record for the State of Mexico, 10 are endemic to Mexico and 4 are considered in some category of vulnerability by the Mexican government. The area is inhabited by 5 of the 6 Mexican felid species. The

  8. Control del Chagas en comunidades guaraníes: conocimiento y hábitos higiénicos dentro del Proyecto de Mejoramiento de Viviendas en Bolivia Control of Chagas' disease in Guarani Communities: project to improve living conditions in Bolivia

    Directory of Open Access Journals (Sweden)

    J. Verdú

    2003-04-01

    Full Text Available El objetivo fue identificar el conocimiento y control del vector (Triatoma infestans transmisor de la enfermedad de Chagas en comunidades guaraníes de Bolivia, conocido como vinchuca. Se trata de un estudio descriptivo de una serie de 98 casos mediante cuestionario semiestructurado sobre: conocimiento de la vinchuca, si produce alguna enfermedad, nombre de la enfermedad y sus consecuencias, así como las conductas de higiene: patio, vivienda, corrales. La vinchuca fue suficientemente conocida (98%, aunque sólo el 14,3% identificó el nombre de la enfermedad. Pese a ser ambientes apropiados para la proliferación de vinchucas, se limpian con poca frecuencia: el 28,6% limpia la vivienda, el 42,9% el patio y el 7,1% el corral. Se evidencia una división sexual del trabajo: mientras las mujeres limpian la vivienda y el patio, los varones limpian los corrales. La experiencia enseña el valor del proyecto de construcción de viviendas saludables y educación para la salud en la medida en que la comunidad los valora. Probablemente, las mujeres son el mejor grupo destinatario, pues realizan más tareas preventivas y no se ausentan con tanta frecuencia de la comunidad.The aim of this study was to identify knowledge and control of vectorial transmission (Triatoma infestans, known as vinchuca of Chagas' disease in Guaraní Communities in Bolivia. We performed a descriptive study of a series of 98 individuals through a semi-structured questionnaire. Interviewees were asked about their familiarity with vinchuca, whether they thought vinchuca produced disease, the name of the disease and its consequences, as well as behavior related to eliminating the domestic insect vectors, such as cleaning of the home, backyard and corral. The insect vector was sufficiently well known (98%, although the name of the disease was identified by only 14.3% of the interviewees. Although the dwellings favored insect proliferation, they were not frequently cleaned: 28.6% cleaned

  9. Corrales de piedra, campos abiertos y pampas de camaruco: Memorias de relacionalidad en la meseta central de Chubut Stone yards, open fields and sacred places: Memories of relatedness in the Chubut´s central plateau

    Directory of Open Access Journals (Sweden)

    Ana Ramos

    2008-12-01

    Full Text Available La "cuestión indígena" como política de estado en Argentina ha estado acompañada por la elaboración académica de mapas étnicos. Las definiciones hegemónicas de estas entidades han presupuesto generalmente algún elemento "esencial" como, por ejemplo, fenotipos, uso de una lengua, o la aglutinación en torno a linajes consanguíneos. A partir de las reformulaciones de las teorías del parentesco desde el modelo heurístico de las sociedades de casas y las teorías sobre la relacionalidad proponemos una aproximación a la memoria social como marco alternativo de interpretación histórica. Esta contempla las prácticas sociales del parentesco y la objetivación de la continuidad de los grupos de pertenencia en las políticas y lugares de la memoria -corrales de piedra, actividades productivas y pampas de camaruco- en la región de la "meseta" de Chubut. Dichas relaciones con el espacio físico cuestionan tanto las definiciones académicas tradicionales de parentesco y de cacicazgo como las clasificaciones étnicas-nacionales.The "Indigenous issue" as a state policy in Argentina has been accompanied by an academic production of ethnic maps. Hegemonic definitions of these entities used to presume some "essential" elements like the phenotype, the use of language or consanguineous lineage membership. Based on the reformulation of kinship theory, which came from the heuristic model of houses and relatedness theory, we propose an approach to social memory as an alternative framework for historical interpretation. This includes kinship social practices as well as the materialization of group membership's continuity in policies and places of memory -such as stone yards, productive activities, open fields and sacred places- in the Chubut central plateau. Finally, we argue that regarding a physical space, these relations question not only the ethnic-national classifications but also the traditional academic definitions of kinship and chieftaincy.

  10. FREQUENCY OF HEPATIC LIPIDOSIS IN JUVENILE RAINBOW TROUT (ONCORHYNCHUS MYKISS) IN A FISH FARM IN THE PERUVIAN CENTRAL SIERRA

    OpenAIRE

    Rosenthal N., Sandra; Sandoval C., Nieves; Gavidia C., César; Tabacchi N., Luis

    2013-01-01

    El objetivo del estudio fue determinar la frecuencia de lipidosis hepática en la trucha arcoíris (Oncorhynchus mykiss) de fase juvenil en base a lesiones anátomohistopatológicas en el hígado. Se trabajó con 58 peces de una piscigranja comercial de la sierra central del Perú. Los peces fueron clasificados como sanos (n=23) y enfermos (n=35) según el oscurecimiento de la piel y erosión de las aletas. Se colectaron muestras de hígado, que se fijaron en formol al 10% y fueron coloreadas con Hemat...

  11. El efecto del fuego y las características topográficas sobre la vegetación y las propiedades del suelo en la zona de transición entre bosques y pastizales de las sierras de Córdoba, Argentina

    OpenAIRE

    Giorgis, Melisa Adriana; Cingolani, Ana María; Cabido, Marcelo Ruben

    2016-01-01

    En el contexto actual de cambio climático, el estudio de la dinámica de las zonas de transición entre bosques y pastizales tiene un papel fundamental, tanto a nivel científico como en la planificación del manejo de los ecosistemas. En este trabajo evaluamos el efecto combinado del fuego, la exposición de ladera y la posición topográfica sobre la vegetación y los suelos en una zona de transición entre bosques y pastizales en las montañas de Córdoba. Para ello elegimos cuatro áreas con diferent...

  12. Invasive exotic plant species in Sierra Nevada ecosystems

    Science.gov (United States)

    Carla M. D' Antonio; Eric L. Berlow; Karen L. Haubensak

    2004-01-01

    The Sierra Nevada is a topographically and floristically diverse region of the western United States. While it comprises only a fifth of the total land area of California, half of the native plant species in the state occur within the range. In addition, more than 400 plant species are endemic to the Sierra Nevada and many of these are listed as threatened or have...

  13. Biosphere and atmosphere interactions in Sierra Nevada forests

    Science.gov (United States)

    Allen H. Goldstein

    2004-01-01

    In the Sierra Nevada, studies are being conducted to assess the impacts of both anthropogenic and biogenic hydrocarbon emissions on regional tropospheric ozone and fine aerosol production. Impacts of ozone deposition and management practices on ecosystem health are also being studied. Human-induced changes in regional air quality have consequences for Sierra Nevada...

  14. Structure of Sierra Blanca (Alpujarride Complex, west of the Betic Cordillera

    Directory of Open Access Journals (Sweden)

    Andreo, B.

    1995-04-01

    importantes evidencias de estiramiento tectónico. Estos pliegues tienen una dirección aproximada E-W en el sector oriental y N-S y E-W en el occidental. En los bordes de ambos sectores los pliegues muestran vergencias opuestas, siempre hacia el interior de la sierra. El origen de esta estructura se explica con un modelo que considera un desplazamiento hacia el oeste de la unidad de Blanca, con respecto a la de Los Reales, formándose pliegues en posición frontal y lateral. En su avance la parte occidental de Sierra Blanca sufrió una importante rotación antihoraria, responsable de la coexistencia de los pliegues de direcciones N-S y E-W. La estructura se formó en condiciones dúctiles, a causa de la presencia de importantes masas peridotíticas de la unidad de Los Reales cabalgante. Este modelo de desplazamientos hacia el W se inserta en los desplazamientos sufridos por las Zonas Internas Bético-Rifeñas (con las unidades de Blanca y de Los Reales incluidas durante finales del Oligoceno y el Mioceno inferior, cuando comenzó a formarse el arco de Gibraltar.

  15. Micrometeorological Observations in a Sierra Nevada Meadow

    Science.gov (United States)

    Blackburn, D. A.; Oliphant, A. J.

    2016-12-01

    Mountain meadows play important roles on watershed and ecosystem services, including improving water quality, moderating runoff and providing biodiversity hotspots. In the Sierra Nevada, mountain meadows are an integral part of the mountain ecosystem and watersheds that impact more than 20 million people. Grazing, logging and other forms of anthropogenic land use in the Sierra Nevada have degraded the functioning of meadows, by altering the morphology, hydrology and vegetation. Existing meandering stream networks become incised and straightened by increased runoff, which effectively lowers the water table and completely alters the ecosystem from moist meadow sedges, grasses, and herbs to dryland grass and shrubs. Given the large growth cycle in healthy meadows, it is also expected that they sequester a significant amount of carbon and enhance atmospheric humidity through evapotranspiration, but relatively little work has been done on the bio-micrometeorology of meadows. The purpose of this study is to assess the growing season carbon, water and energy budgets of a partly degraded meadow in the northern Sierra Nevada. Loney Meadow, located at nearly 2,000 m in the Tahoe National Forest, has been identified as a degraded meadow and is scheduled to undergo restoration work to raise the water table in 2017. A micrometeorological tower with eddy covariance instruments was deployed at the site for most of the snow-free period from May to October 2016. The measurements include: fluxes of CO2, water vapor, surface radiation and energy budget components; ancillary meteorological and soil data; and an automated camera capturing daily images of the meadow surface. The poster will present diurnal and seasonal CO2 on a daily basis with a very rapid increase at the onset of the growing season.

  16. Ecofeminismo, mujeres y desarrollo sustentable: el caso de la Sierra de Santa Rosa en Guanajuato

    Directory of Open Access Journals (Sweden)

    Abril Saldaña Tejeda

    2015-01-01

    Full Text Available en este artículo se explora la participación de las mujeres en el Programa de Desarrollo Sustentable Sierra de Santa Rosa, en Guanajuato, de 2001 a 2011. Se expone la aportación del ecofeminismo para la noción de desarrollo sustentable, y para entender el vínculo entre la naturaleza y las mujeres. Se argumenta que la historia de la región, en específico el auge de la industria minera durante la Colonia, es un buen punto de partida para entender los problemas ambientales de la sierra y para visualizar el vínculo entre las estructuras que funcionan en detrimento del medio ambiente y de las mujeres. Así como también que dicho programa tuvo un efecto positivo en la participación social de las mujeres. Sin embargo, existen todavía retos importantes que se manifiestan en estructuras ideológicas, que impiden la participación de las mujeres como líderes y no sólo como trabajadoras, en las condiciones de pobreza que obstaculizan un verdadero compromiso con la sustentabilidad.

  17. Horizonte construido. Transformación del paisaje en la Casa Huarte

    Directory of Open Access Journals (Sweden)

    Pablo Olalquiaga Bescós

    2014-02-01

    Full Text Available La Casa Huarte (Madrid, 1966 representa, ante todo, una actuación en el paisaje. Sus creadores, José Antonio Corrales y Ramón Vázquez Molezún, invirtieron un método utilizado en proyectos anteriores (Instituto en Herrera de Pisuerga, Residencia en Miraflores, Pabellón de Bruselas donde la edificación se adecuaba al medio y el paisaje donde se insertaba. Mediante una transformación topográfica Corrales y Molezún construyeron un lugar en el que el horizonte, entendido como el paisaje formado por el encuentro de planos donde converge nuestra mirada, fue modificado. Cuando esto ocurre se produce una alteración de la mirada del observador, se “construye” un nuevo horizonte visual que es en definitiva el horizonte de la arquitectura, en el que los límites están definidos por los distintos planos. En esta construcción del nuevo horizonte, en la creación de nuevas experiencias visuales, las esculturas y los árboles, situadas en las plataformas de los patios de la Casa Huarte, se convirtieron en referencias visuales que alteraban los ángulos de visión previamente establecidos por la arquitectura. Estas siluetas incorporan nuevos puntos de referencia en ese horizonte, proporcionando profundidad, perspectiva y una escala intermedia entre la intimidad del observador y la monumentalidad del infinito

  18. Birds of Sierra de Vallejo, Nayarit, Mexico

    Directory of Open Access Journals (Sweden)

    Figueroa-Esquivel, E.M.

    2014-01-01

    Full Text Available Sierra de Vallejo, is considered a priority region for conservation, and is strongly affected by anthropogenic pressures. The inventory of birds are refers to studies in near areas. This study is a concrete contribution of the birds of the mountain chain and north of it. We considered bibliographic records and databases available on the web with records of ocurrence and specimens of scientific collections. Also we perform point counts in different localities inside the reserve. We observed a richness of 261 birds species, the family Tyrannidae is the best represented. Of the species recorded, 177 are permanent residents (31 are endemic and 15 are quasi-endemics to Mexico and 73 are migratory; the remaining eleven records have other status. Also 43 species are in endangered categories. We include species that have not been recorded in the lists of the area and records of species expand their ranges at Nayarit. Due to the great diversity of birds observed, it is necesary to continue the research work about habitat use, abundance and monitoring, it will provides the basis for the conservation of birds of Sierra de Vallejo.

  19. Proyecto de explotación y construcción de un cebadero en sistema Intensivo para 216 terneros en Velilla de la Sierra (Soria)

    OpenAIRE

    Borjabad Arancón, Ana Isabel

    2017-01-01

    El presente documento corresponde al Trabajo Fin de Grado del alumno Ana Isabel Borjabad Arancón para la Titulación de GRADO EN INGENIERIAS AGRICOLA Y MEDIO RURAL. EL objeto del proyecto consiste en la realización de una explotación de ganado vacuno intensivo, denominado cebadero, incluyendo en dicha realización todas las construcciones necesarias así como el estudio y programa de manejo de la explotación. El promotor del proyecto es un agricultor de Velilla de la Sierra,...

  20. Relación entre el estado nutricional y la estimulación ambiental con el rendimiento cognitivo y escolar del niño de primer grado de la zona central media del Perú (costa, sierra y selva

    Directory of Open Access Journals (Sweden)

    Alegría Majluf

    1988-12-01

    Full Text Available A fin de explorar la relación entre el estado nutricional y la estimulación ambiental con el rendimiento cognitivo y escolar de niños de 6 años, se evaluó 146 niños de clase socioeconómica baja y sus respectivas madres, así como 50 niños de clase socioeconómica media de la zona central media del Perú. Se encontró una estrecha relación entre el rendimiento cognitivo y escolar. La desnutrición crónica parece afectar el nivel de la lectura y las matemáticas y los factores socio-culturales en el desarrollo intelectual. Se advierte un efecto variable de la región geográfica y el sexo.

  1. Eficacia del difusor de feromona de procesionaria del pino Pherocon PPM®

    OpenAIRE

    Durán, María; Rodrigo Santamalia, Mª Eugenia; Pérez Laorga, Eduardo; Mas i Gisbert, Hugo

    2012-01-01

    Los resultados de este trabajo forman parte del trabajo de fin de carrera presentado en la Universidad Politecnica de Valencia por Maria Duran Lázaro y dirigido por la Dra. Eugenia Rodrigo Santamalia y Eduardo Perez Laorga con el titulo "Influencia del tipo de trampa en la captura de mariposas de la procesionaria del pino (Thaumetopoea pityocampa Schiff.) en la sierra Calderona" [ES] Se ha ensayado la eficacia de un difusor de la feromona de la procesionaria del pino fabricado por la em...

  2. Problemática indígena « el ", , " ,, declaración conjunta de las cuatro organizaciones indígenas de la sierra nevada de santa marta para la interlocución con el estado y la sociedad nacional

    OpenAIRE

    Organización Wiwa Yugumaitm Bunkwanarrwa (owybt); Organización Indígena Kankwama (aik); Cor.federoeion Indígena Tayrona (eít); Organízaeión Gonawindua Tayrona (ogt)

    2014-01-01

    Este documento responde a las preocupaciones comunes de las cuatro organiz"acio..: nes representativas de los pueblos indígenas de la Sierra Nevada (OWYBT, OIK, CIT, OGT), a la hora de trazar el futuro del territorio que desde los inicios del mundo  les fue encomendado por los Padres y Madresespirituales.

  3. Projected treatment capacity needs in sierra leone.

    Science.gov (United States)

    White, Richard A; MacDonald, Emily; de Blasio, Birgitte Freiesleben; Nygård, Karin; Vold, Line; Røttingen, John-Arne

    2015-01-30

    The ongoing outbreak of Ebola Virus Disease in West Africa requires immediate and sustained input from the international community in order to curb transmission. The CDC has produced a model that indicates that to end the outbreak by pushing the reproductive number below one, 25% of the patients must be placed in an Ebola Treatment Unit (ETC) and 45% must be isolated in community settings in which risk of disease transmission is reduced and safe burials are provided. In order to provide firmer targets for the international response in Sierra Leone, we estimated the national and international personnel and treatment capacity that may be required to reach these percentages. We developed a compartmental SEIR model that was fitted to WHO data and local data allowing the reproductive number to change every 8 weeks to forecast the progression of the EVD epidemic in Sierra Leone. We used the previously estimated 2.5x correction factor estimated by the CDC to correct for underreporting. Number of personnel required to provide treatment for the predicted number of cases was estimated using UNMEER and UN OCHA requests for resources required to meet the CDC target of 70% isolation. As of today (2014-12-04), we estimate that there are 810 (95% CI=646 to 973) EVD active cases in treatment, with an additional 3751 (95% CI=2778 to 4723) EVD cases unreported and untreated. To reach the CDC targets today, we need 1140 (95% CI=894 to 1387) cases in ETCs and 2052 (95% CI=1608 to 2496) at home or in a community setting with a reduced risk for disease transmission. In 28 days (2015-01-01), we will need 1309 (95% CI=804 to 1814) EVD cases in ETCs and 2356 (95% CI=1447 to 3266) EVD cases at reduced risk of transmission. If the current transmission rate is not reduced, up to 3183 personnel in total will be required in 56 days (2015-01-29) to operate ETCs according to our model. The current outbreak will require massive input from the international community in order to curb the

  4. Interaction of an Introduced Predator with Future Effects of Climate Change in the Recruitment Dynamics of the Imperiled Sierra Nevada Yellow-legged Frog (Rana sierrae)

    Science.gov (United States)

    I Lacan; Kathleen R. Matthews; K.V. Feldman

    2008-01-01

    Between-year variation in snowpack (from 20 to 200% of average) and summer rainfall cause large fluctuations in volume of small lakes in the higher elevation (> 3000 m) Sierra Nevada, which are important habitat for the imperiled Sierra Nevada Yellow-legged Frog, Rana sierrae. Climate change (global warming) is predicted to increase these...

  5. Evaluación del efecto citotóxico de doxiciclina sobre la línea celular CHO-K1

    OpenAIRE

    De Luca, Julio César; Daniele, Marcela; Dade, Martín; Mestorino, Olga Nora

    2013-01-01

    Doxiciclina (DOX) es un antimicrobiano semisintético perteneciente al grupo de las tetraciclinas, muy utilizado en medicina veterinaria en aves de corral y en cerdos, para el tratamiento de enfermedades infecciosas del tracto digestivo y respiratorio. Si bien están establecidos los límites máximos de residuos (LMRs) permitidos en tejidos comestibles de origen animal (100 ng/g en músculo, 300 ng/g en hígado y grasa; y 600 ng/g en riñón), los efectos nocivos del antimicrobiano en concentracione...

  6. Geomagnetic Polarity Epochs: Sierra Nevada II.

    Science.gov (United States)

    Cox, A; Doell, R R; Dalrymple, G B

    1963-10-18

    Ten new determinations on volcanic extrusions in the Sierra Nevada with potassium-argon ages of 3.1 million years or less indicate that the remanent magnetizations fall into two groups, a normal group in which the remanent magnetization is directed downward and to the north, and a reversed group magnetized up and to the south. Thermomagnetic experiments and mineralogic studies fail to provide an explanation of the opposing polarities in terms of mineralogic control, but rather suggest that the remanent magnetization reflects reversals of the main dipole field of the earth. All available radiometric ages are consistent with this field-reversal hypothesis and indicate that the present normal polarity epoch (N1) as well as the previous reversed epoch (R1) are 0.9 to 1.0 million years long, whereas the previous normal epoch (N2) was at least 25 percent longer.

  7. Sierra Toolkit Manual Version 4.48.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Toolkit Team

    2018-03-01

    This report provides documentation for the SIERRA Toolkit (STK) modules. STK modules are intended to provide infrastructure that assists the development of computational engineering soft- ware such as finite-element analysis applications. STK includes modules for unstructured-mesh data structures, reading/writing mesh files, geometric proximity search, and various utilities. This document contains a chapter for each module, and each chapter contains overview descriptions and usage examples. Usage examples are primarily code listings which are generated from working test programs that are included in the STK code-base. A goal of this approach is to ensure that the usage examples will not fall out of date. This page intentionally left blank.

  8. REGIONAL HYDROLOGY OF THE NOPAL I SITE, SIERRA DE PENA BLANCA, CHIHUAHUA, MEXICO

    Energy Technology Data Exchange (ETDEWEB)

    J.A. Rodriguez-Pineda; P. Goodell; P.F. Dobson; J. Walton; R. Oliver; De La Garza; S. Harder

    2005-07-11

    The U.S. Department of Energy sponsored the drilling of three wells in 2003 near the Nopal I uranium deposit at the Sierra Pena Blanca, Chihuahua, Mexico. Piezometric information is being collected to understand groundwater flow at local and regional levels as part of an ongoing natural analogue study of radionuclide migration. Water level monitoring reported at these and other wells in the region is combined with archival data to provide a better understanding of the hydrology at Nopal I. Initial results suggest that the local hydrology is dependent on the regional hydrologic setting and that this groundwater system behaves as an unconfined aquifer. The region is dominated by an alternating sequence of highlands and basins that step down from west to east. The Sierra de Pena Blanca was downdropped from the cratonic block to the west during Cenozoic extension. The Nopal I area is near the intersection of two large listric faults, and the questa of ash flow tuffs that hosts the deposit has been subjected to complex structural events. The Pena Blanca Uranium District was originally characterized by 105 airborne radiometric anomalies, indicating widespread uranium mineralization. The Nopal I uranium deposit is located in the Sierra del Pena Blanca between the Encinillas Basin to the west, with a mean elevation of 1560 m, and the El Cuervo Basin to the east, with a mean elevation of 1230 m. The Nopal I + 10 level is at an intermediate elevation of 1463 m, with a corresponding groundwater elevation of approximately 1240 m. The regional potentiometric surface indicates flow from west to east, with the El Cuervo Basin being the discharge zone for the regional flow system. However, it appears that the local groundwater potential beneath the Nopal I site is more in accordance with the water table of the El Cuervo Basin than with that of the Encinillas Basin. This might indicate that there is limited groundwater flow between the Encinillas Basin and the Nopal I area.

  9. REGIONAL HYDROLOGY OF THE NOPAL I SITE, SIERRA DE PENA BLANCA, CHIHUAHUA, MEXICO

    International Nuclear Information System (INIS)

    Rodriguez-Pineda, J.A.; Goodell, P.; Dobson, P.F.; Walton, J.; Oliver, R.; De La Garza; Harder, S.

    2005-01-01

    The U.S. Department of Energy sponsored the drilling of three wells in 2003 near the Nopal I uranium deposit at the Sierra Pena Blanca, Chihuahua, Mexico. Piezometric information is being collected to understand groundwater flow at local and regional levels as part of an ongoing natural analogue study of radionuclide migration. Water level monitoring reported at these and other wells in the region is combined with archival data to provide a better understanding of the hydrology at Nopal I. Initial results suggest that the local hydrology is dependent on the regional hydrologic setting and that this groundwater system behaves as an unconfined aquifer. The region is dominated by an alternating sequence of highlands and basins that step down from west to east. The Sierra de Pena Blanca was downdropped from the cratonic block to the west during Cenozoic extension. The Nopal I area is near the intersection of two large listric faults, and the questa of ash flow tuffs that hosts the deposit has been subjected to complex structural events. The Pena Blanca Uranium District was originally characterized by 105 airborne radiometric anomalies, indicating widespread uranium mineralization. The Nopal I uranium deposit is located in the Sierra del Pena Blanca between the Encinillas Basin to the west, with a mean elevation of 1560 m, and the El Cuervo Basin to the east, with a mean elevation of 1230 m. The Nopal I + 10 level is at an intermediate elevation of 1463 m, with a corresponding groundwater elevation of approximately 1240 m. The regional potentiometric surface indicates flow from west to east, with the El Cuervo Basin being the discharge zone for the regional flow system. However, it appears that the local groundwater potential beneath the Nopal I site is more in accordance with the water table of the El Cuervo Basin than with that of the Encinillas Basin. This might indicate that there is limited groundwater flow between the Encinillas Basin and the Nopal I area

  10. Assessing unmet anaesthesia need in Sierra Leone: a secondary ...

    African Journals Online (AJOL)

    Department of Surgery, Connaught Hospital Freetown, Sierra Leone. 3. Department of .... need, is a key part of planning for increasing surgical capacity. Limitations. As noted by Groen et al24 this data .... Emergency and surgery services of ...

  11. Sierra Leone Journal of Biomedical Research Original Article

    African Journals Online (AJOL)

    User

    university hospital in southern Sierra Leone, a total of 66 (4.71±2.52) victims reported having been bitten by snakes in 11 ... social, economic, psychological and health impacts of snakebite ..... Epidemiological profile of snakebite cases from.

  12. Sierra Leone Journal of Biomedical Research Original Article

    African Journals Online (AJOL)

    User

    A publication of the College of Medicine and Allied Health Sciences, University of Sierra Leone ... disability associated with venomous snakebites result in lasting .... 1Mean ± Standard Error. 95% Confidence Limit. Community. Self. Reported.

  13. British Military Intervention into Sierra Leone: A Case Study

    National Research Council Canada - National Science Library

    Roberson, Walter G

    2007-01-01

    .... The successful British intervention led to the defeat of the Revolutionary United Front (RUF) and final peace accords, restored order to a failed state, and allowed the democratic restoration of the government of Sierra Leone...

  14. Population size, survival, growth, and movements of Rana sierrae

    Science.gov (United States)

    Fellers, Gary M.; Kleeman, Patrick M.; Miller, David A. W.; Halstead, Brian J.; Link, William

    2013-01-01

    Based on 2431 captures of 757 individual frogs over a 9-yr period, we found that the population of R. sierrae in one meadow–stream complex in Yosemite National Park ranged from an estimated 45 to 115 adult frogs. Rana sierrae at our relatively low elevation site (2200 m) grew at a fast rate (K = 0.73–0.78), had high overwintering survival rates (44.6–95%), lived a long time (up to 16 yr), and tended to be fairly sedentary during the summer (100% minimum convex polygon annual home ranges of 139 m2) but had low year-to-year site fidelity. Even though the amphibian chytrid fungus (Batrachochytrium dendrobatidis, Bd) has been present in the population for at least 13 yr, there was no clear downward trend as might be expected from reports of R. sierrae population declines associated with Bd or from reports of widespread population decline of R. sierrae throughout its range.

  15. Sierra Leone Journal of Biomedical Research Case Study

    African Journals Online (AJOL)

    Zackary Suleiman

    A publication of the College of Medicine and Allied Health Sciences, University of Sierra Leone ... Case Study ... Peri-operative management of patients with significant cardio-respiratory disease ... contribute to patient safety by preventing any.

  16. Sierra Structural Dynamics User's Notes

    Energy Technology Data Exchange (ETDEWEB)

    Reese, Garth M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-10-19

    Sierra/SD provides a massively parallel implementation of structural dynamics finite element analysis, required for high fidelity, validated models used in modal, vibration, static and shock analysis of weapons systems. This document provides a users guide to the input for Sierra/SD. Details of input specifications for the different solution types, output options, element types and parameters are included. The appendices contain detailed examples, and instructions for running the software on parallel platforms.

  17. Sierra/SD User's Notes.

    Energy Technology Data Exchange (ETDEWEB)

    Munday, Lynn Brendon; Day, David M.; Bunting, Gregory; Miller, Scott T; Crane, Nathan K

    2018-03-01

    Sierra/SD provides a massively parallel implementation of structural dynamics finite element analysis, required for high fidelity, validated models used in modal, vibration, static and shock analysis of weapons systems. This document provides a users guide to the input for Sierra/SD. Details of input specifications for the different solution types, output options, element types and parameters are included. The appendices contain detailed examples, and instructions for running the software on parallel platforms.

  18. Preliminary flora of the Sierra Bacadehuachi, Sonora, Mexico

    Science.gov (United States)

    Thomas R. Van Devender; Ana Lilia Reina-Guerrero; George M. Ferguson; George Yatskievych; Beatriz E. Loyola-Reina; Gertrudis Yanes-Arvayo; Maria de la Paz Montanez-Armenta; John L. Anderson; Stephen F. Hale; Sky Jacobs

    2013-01-01

    The Sierra Bacadéhuachi in east-central Sonora is the westernmost mountain range in the Sierra Madre Occidental (SMO), located east of Bacadéhuachi, Municipio de Bacadéhuachi, 34 km east of the Chihuahua border, and 165 km south of the Arizona border. The vegetation ranges from lowland foothills thornscrub up through desert grassland to oak woodland and pine-oak forest...

  19. Plant endemics to Sierra de Gredos (central Spain: taxonomic, distributional, and evolutionary aspects

    Directory of Open Access Journals (Sweden)

    García, Bernardo

    2008-12-01

    contacts or relatively recent range expansion of populations are the two most plausible interpretations in phylogeography of most taxa. Massive extinctions after glacial episodes may have been, in part, responsible for a limited number of endemics and genetic differentiation in Sierra de Gredos, which contrasts with high levels of endemicity in other areas (hotspots of the Mediterranean floristic region.Las causas del bajo número de endemismos de la Sierra de Gredos (centro de la Península Ibérica son poco conocidas. Aspectos taxonómicos, distribucionales y genéticos de los 12 taxones endémicos se discuten en este artículo. Nuevas poblaciones encontradas en los últimos años han resultado ser nuevas citas corológicas y nuevos táxones para la ciencia. En concreto, en este artículo ampliamos la distribución de Pseudomisopates rivas-martinezii y describimos una nueva subespecie (Teucrium oxylepis subsp. Gredense. Niveles de variación genética han sido investigados por medio de la secuenciación de la región ITS (del inglés Internal Transcribed Sequence, que es una región de ADN nuclear ampliamente empleada para detectar divergencia genética significativa a nivel de poblaciones. A nivel específico, la presencia de solo ocho especies endémicas de este amplio territorio montañoso (c. 4.800 km2 indica escasos eventos de especiación seguidos por procesos de supervivencia de las especies nuevamente formadas, a pesar de la riqueza en especies de la flora de la Sierra de Gredos (>2.500. De acuerdo con los niveles de variación de secuencias ITS, un notable proceso de aislamiento debe haber precedido la divergencia del género monotípico Pseudomisopates de sus parientes más próximos (Misopates, Acanthorrhinum. El aislamiento de las otras siete especies de las especies más próximas ha sido un proceso más reciente tal y como interpretamos por la limitada variación nucleotídica de las secuencias. A nivel poblacional, comparaciones de secuencias ITS

  20. Chemical and isotopic study of thermal springs and gas discharges from Sierra de Chiapas, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Nencetti, A; Tassi, F; Vaselli, O [Department of Earth Sciences, Florence (Italy); Macias, J. L [Instituto de Geofisica, Universidad Nacional Autonoma de Mexico, D.F. (Mexico); Magro, G [CNR-Institute of Geosciences and Earth Resources, Pisa (Italy); Capaccioni, B [Institute of Volcanology and Geochemistry, Urbino (Italy); Minissale, A [CNR-Institute of Geosciences and Earth Resources, Florence (Italy); Mora, J. C [Instituto de Geofisica, Universidad Nacional Autonoma de Mexico, D.F. (Mexico)

    2005-01-15

    (SDT <250mg/L). La mayoria de estas aguas estan asociadas con descargas de gas compuestas por N{sub 2} (hasta 93 % en vol.), CO{sub 2} (2.4-31.2 % en vol.) y Ar (hasta 1.25 % en vol.) con origen predominantemente meteorico. H{sub 2}S aparece unicamente en las muestras de gas colectadas en El Azufre (hasta 1.1 % en vol.). Los valores de {delta}{sup 1}3C-CO{sub 2} comunmente inferiores a -9.7% (PDB) sugieren un origen parcialmente biogenico del CO{sub 2}. Los parametros quimicos e isotopicos de los manantiales indican que la circulacion de fluidos en la Sierra de Chiapas se regula principalmente por la infiltracion de aguas meteoricas en rocas carbonatadas del Cretacico medio-tardio hasta las formaciones evaporiticas del Jurasico tardio-Cretacico temprano. Estas ultimas representan la fuente principal de las especies en solucion de las aguas. No se encontraron evidencias de la presencia de sistemas con entalpias medias a altas por debajo de la Sierra de Chiapas.

  1. Renealmia alpinia (Rottb.: Maas (Zingiberaceae: planta comestible de la Sierra Norte de Puebla (México

    Directory of Open Access Journals (Sweden)

    Macía, Manuel J.

    2002-06-01

    Full Text Available The edible fruits of Renealmia alpinia are highly valued in the Sierra Norte de Puebla (México where they are managed at a household level. The plant is wild in the región, although a rare species. The aril of the fruit is the edible part. After harvesting, the aril is extracted fresh and processed for local consumption. Sometimes the fruits are commercialized in tradicional markets. Only 19% of the total weight of the fruits is used for food.Los frutos comestibles de Renealmia alpinia son muy apreciados en la Sierra Norte de Puebla (México, en donde son manejados a nivel familiar. La planta crece silvestre en la región, aunque es una especie poco frecuente. La parte comestible es el arilo de los frutos. Tras la cosecha, se extrae en fresco el arilo y se procesa para su consumo familiar. Ocasionalmente los frutos se comercializan en los mercados tradicionales. Solamente el 19 % del peso total de los frutos se aprovecha para alimentación.

  2. Anfibios y reptiles de la sierra de Cuatro Venados, Oaxaca, México

    Directory of Open Access Journals (Sweden)

    Martín-Regalado, N.

    2016-12-01

    Full Text Available Amphibians and reptiles of the Sierra de Cuatro Venados, Oaxaca, Mexico We surveyed amphibian and reptile communities in temperate forest in the Sierra de Cuatro Venados to increase knowledge of the Oaxacan herpetofauna. We obtained 193 visual and 106 voucher records during 38 days of fieldwork. During the study, we recorded 36 of the 40 species predicted to occur in this mountain range: nine amphibians and 27 reptiles, five of which represent new records at the regional scale. Pine-oak and oak-pine forest habitats were most similar in terms of taxonomic composition (70%, and together contributed a total of 29 species (79%. Species richness was greatest in the altitudinal range 2,001-2,500 m a.m.s l. (72% and terrestrial microhabitat (89%. Fifteen of the observed species (42% are considered to be threatened nationally or internationally, twelve are endemic to Mexico, and one is locally endemic. The total number of reptile and amphibian species known to inhabit the Montañas y Valles del Occidente physiographic region is increased to 122.

  3. Registro de la perdiz veracruzana o Chivizcoyo (Dendrortyx barbatus Gould en la sierra norte de Oaxaca, México

    Directory of Open Access Journals (Sweden)

    Sergio H. Aguilar-Rodríguez

    2015-06-01

    Full Text Available Se describe el primer registro de la Perdiz Veracruzana o Chivizcoyo (Dendrortyx barbatus en la Sierra Norte de Oaxaca. Los métodos usados para obtener su registro así como la vegetación del área son descritos. Se menciona el conocimiento local autóctono de ave y su importancia económica, pese a no haber sido anteriormente registrada por ornitólogos. Se discuten evidencias que agregan certeza al registro y se menciona la importancia de éste para la ampliación de su rango de distribución.

  4. Contaminant studies in the Sierra Nevadas

    Science.gov (United States)

    Sparling, D.W.; Fellers, G.

    2002-01-01

    full text: Several species of anuran amphibians (frogs and toads) are experiencing severe population declines in even seemingly pristine areas of the Sierra Mountains of California. Among the most severely depressed species are the redlegged frog, the foothill and mountain yellow-legged frogs, the Yosemite toad, and the Cascades frog. Several factors, such as habitat fragmentation, introduced predators (especially fish), and disease, have been linked to these declines. But recent evidence from a USGS-led study shows that contaminants are a primary factor. During the past three years, researchers from the USGS Patuxent Wildlife Research Center, the Western Ecology Research Center, the USDA Beltsville Agriculture Research Center, and the Texas A&M University have teamed up to conduct an extensive study on airborne pesticides and their effects on amphibian populations in the Sierra Nevada Mountains. Previous work on environmental chemistry demonstrated that pesticides from the intensely agricultural Central Valley of California are being blown into the more pristine Sierra Nevada Mountains, especially around Sequoia and Yosemite National Parks. Several pesticides, including diazinon, chlorpyrifos, malathion and endosulfan, can be measured in snow, rainfall, and pond waters in these national parks. With the exception of endosulfan, these pesticides affect and even kill both invertebrates and vertebrate species by inhibiting cholinesterase, an enzyme essential to proper nervous system functioning. In the summer of 2001, we published a paper showing that these same pesticides are now found in adults and the tadpoles of Pacific treefrogs. The results of this landmark study showed that more than 50 percent of the tadpoles and adults sampled in Yosemite and Sequoia National Parks had detectable levels of diazinon or chlorpyrifos and that 86 percent of the Pacific treefrogs sampled in the Lake Tahoe region had detectable levels of endosulfan. In contrast, frogs that were

  5. Las lecturas múltiples de una frontera: Huehuetenango y la Sierra de los Cuchumatanes

    Directory of Open Access Journals (Sweden)

    Alejandro Garay Herrera

    2015-02-01

    Full Text Available En este artículo se pretende analizar la región de Huehuetenango en general, y la Sierra de los Cuchumatanes en particular, como una zona de múltiples transformaciones e identidades que se traslapan entre sí a lo largo del tiempo y el espacio. Al realizar diversas lecturas (históricas, culturales, lingüísticas de esta región, se constata que el concepto de frontera se puede aplicar en diferentes formas y momentos a este espacio geográfico, y no solo en referencia a la moderna frontera política que marca los límites entre dos estados soberanos, como son Guatemala y México.

  6. 76 FR 44535 - Revisions to the California State Implementation Plan, Northern Sierra Air Quality Management...

    Science.gov (United States)

    2011-07-26

    ... the California State Implementation Plan, Northern Sierra Air Quality Management District, Sacramento Metropolitan Air Quality Management District, and South Coast Air Quality Management District AGENCY... the Northern Sierra Air Quality Management District (NSAQMD), Sacramento Metropolitan Air Quality...

  7. 76 FR 44493 - Revisions to the California State Implementation Plan, Northern Sierra Air Quality Management...

    Science.gov (United States)

    2011-07-26

    ... California State Implementation Plan, Northern Sierra Air Quality Management District, Sacramento Metropolitan Air Quality Management District, and South Coast Air Quality Management District AGENCY... approve revisions to the Northern Sierra Air Quality Management District (NSAQMD), Sacramento Metropolitan...

  8. Significado de las deformaciones internas en las peridotitas de Sierra Alpujata (Málaga

    Directory of Open Access Journals (Sweden)

    Tubía, J. M.

    1985-12-01

    Full Text Available The Ronda peridotites rest at the base of the Los Reales nappe (Alpujarride Complex, Betic Chain. Two successive plastic deformations are imprinted in the Sierra Alpujata peridotites. The first one is a high temperature (> 1000º C -low stress (0.3-0.5 Kb deformation as show by coarse-grained porphyroclastic lherzolites. This deformation can take place by mantle flow in a spreading zone related to continental rifting. The second deformation. at low temperature (~8000º C and high stress (1-2 Kb, erase the last one at the edge rones of the peridotite sheet, giving the mylonitisation of peridotites and the development of dynamothermal aureoles in the wall rocks, This deformation is due to the thrusting of a mantle slab over the continental crust. The kinematic analysis of the high and low-temperature ultrabasic tectonites provides, in the present position of the Betic Chain a N 70º E direction for the paleorift. The peridotite thrusting is practically realized in the same direction, from the WSW to the ENE.

    Las peridotitas de Ronda (Málaga forman la base del manto de Los Reales (Alpujárrides, Cordilleras Béticas. Las rocas ultrabásicas del macizo de Sierra Alpujata permiten reconocer dos deformaciones plásticas sucesivas. La primera es una deformación de altas temperaturas (> 1.000ºC y bajos esfuerzos (0.3-0.5 Kb que se conserva en lherzolitas con textura porfiroclástica de grano grueso. Esta deformación puede atribuirse al flujo del manto en una zona de expansión relacionada a procesos de "rifting" continental. La segunda deformación, de bajas temperaturas (~800ºC y altos esfuerzos (1-2 Kb, oblitera a la anterior en las zonas de borde de la lámina peridotítica, produciendo la milonitización de las peridotitas y el desarrollo de aureolas dinamotérmicas en los materiales encajantes. Esta deformación se debe al cabalgamiento de una escama del manto sobre la corteza continental. El análisis cinemático de las tectonitas

  9. Diagnóstico socio-ambiental para un desarrollo sustentable de la Puna Meridional Argentina, Localidad de Antofagasta de la Sierra, Catamarca

    Directory of Open Access Journals (Sweden)

    Liliana M. Manzi

    2008-05-01

    Full Text Available Se presenta un diagnóstico socio-ambiental realizado en la comunidad de Antofagasta de la Sierra, Provincia de Catamarca, Argentina, siendo tomados en consideración las unidades sociales de producción, los rebaños, las pasturas disponibles y los patrones de uso y tenencia de la tierra. Se pretende identificar y evaluar la incidencia del actual uso del espacio sobre el medio natural y discutir las iniciativas oficiales de desarrollo económico para este sector de la Puna argentina.

  10. Antropometría del trabajador minero de la altura

    OpenAIRE

    Augusto V Ramírez

    2006-01-01

    Introducción: La antropometría trata de las medidas del cuerpo humano y es base fundamental para la ergonomía. La minería peruana se localiza casi siempre en la gran altura, hábitat del hombre andino, que tiene características antropométricas diversas al hombre del llano. Objetivo: Caracterizar antropométricamente a una población andina de trabajadores mineros en la sierra central del Perú. Diseño: El estudio fue descriptivo, tipo prospectivo y observacional. Lugar: Servicio de Salud Ocupacio...

  11. Antropometría del trabajador minero de la altura

    OpenAIRE

    Ramírez, Augusto V.

    2013-01-01

    Introducción: La antropometría trata de las medidas del cuerpo humano y es base fundamental para la ergonomía. La minería peruana se localiza casi siempre en la gran altura, hábitat del hombre andino, que tiene características antropométricas diversas al hombre del llano. Objetivo: Caracterizar antropométricamente a una población andina de trabajadores mineros en la sierra central del Perú. Diseño: El estudio fue descriptivo, tipo prospectivo y observacional. Lugar: Servicio de Salud Ocupacio...

  12. Environmental values and risk: A review of Sierra Club policies

    International Nuclear Information System (INIS)

    Craig, P.P.

    1999-01-01

    Sierra Club values are driven by an overriding environmental ethic. Sierra Club environmental values may be characterized by the concept of 'usufruct' a term favored by United States Founding Father Thomas Jefferson. Usufruct conveys the idea that the environment is ours to use, but not to destroy. Each generation has the obligation to pass on to future generations a world at least as environmentally rich as the one it inherited. It is appropriate to accept risk today in order to preserve the environment for generations yet to come. As viewed through the lens of its formal policies, the Sierra Club is an organization that embraces technology, but insists that technology be evaluated comprehensively, taking full account of both environmental and social externalities. The Club is 'risk averse' with respect to early introduction of technologies seen as likely to have significant negative environmental or social impact. The Club places heavy emphasis on process, which must involve the public meaningfully

  13. SIERRA - A 3-D device simulator for reliability modeling

    Science.gov (United States)

    Chern, Jue-Hsien; Arledge, Lawrence A., Jr.; Yang, Ping; Maeda, John T.

    1989-05-01

    SIERRA is a three-dimensional general-purpose semiconductor-device simulation program which serves as a foundation for investigating integrated-circuit (IC) device and reliability issues. This program solves the Poisson and continuity equations in silicon under dc, transient, and small-signal conditions. Executing on a vector/parallel minisupercomputer, SIERRA utilizes a matrix solver which uses an incomplete LU (ILU) preconditioned conjugate gradient square (CGS, BCG) method. The ILU-CGS method provides a good compromise between memory size and convergence rate. The authors have observed a 5x to 7x speedup over standard direct methods in simulations of transient problems containing highly coupled Poisson and continuity equations such as those found in reliability-oriented simulations. The application of SIERRA to parasitic CMOS latchup and dynamic random-access memory single-event-upset studies is described.

  14. Ebola Surveillance - Guinea, Liberia, and Sierra Leone.

    Science.gov (United States)

    McNamara, Lucy A; Schafer, Ilana J; Nolen, Leisha D; Gorina, Yelena; Redd, John T; Lo, Terrence; Ervin, Elizabeth; Henao, Olga; Dahl, Benjamin A; Morgan, Oliver; Hersey, Sara; Knust, Barbara

    2016-07-08

    Developing a surveillance system during a public health emergency is always challenging but is especially so in countries with limited public health infrastructure. Surveillance for Ebola virus disease (Ebola) in the West African countries heavily affected by Ebola (Guinea, Liberia, and Sierra Leone) faced numerous impediments, including insufficient numbers of trained staff, community reticence to report cases and contacts, limited information technology resources, limited telephone and Internet service, and overwhelming numbers of infected persons. Through the work of CDC and numerous partners, including the countries' ministries of health, the World Health Organization, and other government and nongovernment organizations, functional Ebola surveillance was established and maintained in these countries. CDC staff were heavily involved in implementing case-based surveillance systems, sustaining case surveillance and contact tracing, and interpreting surveillance data. In addition to helping the ministries of health and other partners understand and manage the epidemic, CDC's activities strengthened epidemiologic and data management capacity to improve routine surveillance in the countries affected, even after the Ebola epidemic ended, and enhanced local capacity to respond quickly to future public health emergencies. However, the many obstacles overcome during development of these Ebola surveillance systems highlight the need to have strong public health, surveillance, and information technology infrastructure in place before a public health emergency occurs. Intense, long-term focus on strengthening public health surveillance systems in developing countries, as described in the Global Health Security Agenda, is needed.The activities summarized in this report would not have been possible without collaboration with many U.S and international partners (http://www.cdc.gov/vhf/ebola/outbreaks/2014-west-africa/partners.html).

  15. Pierre Charmoz : La montagne à seins nus, un roman érotique de montagne, ou de la destruction du mythe alpin par le langage Pierre Charmoz: La Montagne à seins nus, or, the Debunking of the Alpine Myth trough Language Pierre Charmoz, La Sierra de los pechos desnudos o la destrucción del mito alpino por el lenguage

    Directory of Open Access Journals (Sweden)

    Michel Mestre

    1996-05-01

    Full Text Available La Montagne à seins nus de Pierre Charmoz est l'un des rares romans de montagne dans lequel l'érotisme joue un rôle important. C'est également une tentative de remise en cause des mythologies sur lesquelles le roman de montagne s'appuie, pour n'en garder que l'aspect léger et humoristique.La Montagne à seins nus, by Pierre Charmoz, is one of these few mountain novels in which eroticism plays a major part, it is also an attempt at debunking the mythologies on which alpine novels traditionally rest. It keeps only laughter and a gentle spirit of derision from it.La Sierra de los pechos desnudos, de Pierre Charmoz, es una de las raras novelas de montaña en las cuales el erotismo ocupa un lugar preponderante. También se empeña en derribar los mitos sobre los cuales suelen construirse las novelas alpinas tradicionales. De éstos permanece la risa, y uno disfruta mientras se hace burla de ellos.

  16. Sierra/Aria 4.48 Verification Manual.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal Fluid Development Team

    2018-04-01

    Presented in this document is a portion of the tests that exist in the Sierra Thermal/Fluids verification test suite. Each of these tests is run nightly with the Sierra/TF code suite and the results of the test checked under mesh refinement against the correct analytic result. For each of the tests presented in this document the test setup, derivation of the analytic solution, and comparison of the code results to the analytic solution is provided. This document can be used to confirm that a given code capability is verified or referenced as a compilation of example problems.

  17. Comparison of preliminary herpetofaunas of the Sierras la Madera (Oposura) and Bacadehuachi with the mainland Sierra Madre Occidental in Sonora, Mexico

    Science.gov (United States)

    Thomas R. Van Devender; Erik F. Enderson; Dale S. Turner; Roberto A. Villa; Stephen F. Hale; George M. Ferguson; Charles. Hedgcock

    2013-01-01

    Amphibians and reptiles were observed in the Sierra La Madera (59 species), an isolated Sky Island mountain range, and the Sierra Bacadéhuachi (30 species), the westernmost mountain range in the Sierra Madre Occidental (SMO) range in east-central Sonora. These preliminary herpetofaunas were compared with the herpetofauna of the Yécora area in eastern Sonora in the main...

  18. Fitogeografía de la Sierra Monte Grande, Charcas, San Luis Potosí, México

    Directory of Open Access Journals (Sweden)

    Reyes Agüero J. Antonio

    1999-06-01

    especies, se analizó su fitogeografía histórica con base en los taxones (familias, géneros y especies de distribución restringida. Al nivel de familia se identificaron tres patrones de distribución: 1 desde Norteamérica hasta el norte de Suramérica; 2 con mayor amplitud en el continente americano; 3 familias relacionadas con la región del Mediterráneo. Al nivel de género se encontraron cinco patrones: 1 endémicos de las zonas semisecas a muy secas de México y regiones adyacentes de Estados Unidos; 2 desde el sur de Estados Unidos hasta Centroamérica; 3 de distribución amplia pero con marcada relación antillana; 4 relacionados con la región del Mediterráneo; 5 disyuntos o vicariantes de las zonas áridas de Norte y Suramérica. Al nivel de especie se identificaron nueve patrones de distribución: 1 altiplanicie septentrional; 2 altiplanicie meridional; 3 altiplanicie y zonas adyacentes; 4 altiplanicie-Sierra Madre de Oaxaca; 5 altiplanicie-planicie costera noroccidental; 6 altiplanicie-planicies costeras noroccidental y nororiental; 7 altiplanicie-planicie costera nororiental; 8 región xerofítica mexicana; 9 altiplanicie sierras Madre. Se descarta que estos patrones sean casuales, pues concuerdan con teorías recientes sobre el proceso que culminó con la configuración actual del continente; se postula un papel destacado del Caribe en la florigénesis de linajes vegetales actuales de las zonas semisecas, secas y muy secas de México y en el mismo sentido un papel destacado del Mediterráneo Antiguo.

  19. Comparison of the tropical floras of the Sierra la Madera and the Sierra Madre Occidental, Sonora, Mexico

    Science.gov (United States)

    Thomas R. Van Devender; Gertrudis Yanes-Arvayo; Ana Lilia Reina-Guerrero; Melissa Valenzuela-Yanez; Maria de la Paz Montanez-Armenta; Hugo Silva-Kurumiya

    2013-01-01

    The floras of the tropical vegetation in the Sky Island Sierra la Madera (SMA) near Moctezuma in northeastern Sonora (30°00’N 109°18’W) and the Yécora (YEC) area in the Sierra Madre Occidental (SMO) in eastern Sonora (28°25’N 109°15”W) were compared. The areas are 175 km apart. Tropical vegetation includes foothills thornscrub (FTS) in both areas and tropical deciduous...

  20. Sierra/Solid Mechanics 4.48 User's Guide.

    Energy Technology Data Exchange (ETDEWEB)

    Merewether, Mark Thomas; Crane, Nathan K; de Frias, Gabriel Jose; Le, San; Littlewood, David John; Mosby, Matthew David; Pierson, Kendall H.; Porter, Vicki L.; Shelton, Timothy; Thomas, Jesse David; Tupek, Michael R.; Veilleux, Michael; Gampert, Scott; Xavier, Patrick G.; Plews, Julia A.

    2018-03-01

    Sierra/SolidMechanics (Sierra/SM) is a Lagrangian, three-dimensional code for finite element analysis of solids and structures. It provides capabilities for explicit dynamic, implicit quasistatic and dynamic analyses. The explicit dynamics capabilities allow for the efficient and robust solution of models with extensive contact subjected to large, suddenly applied loads. For implicit problems, Sierra/SM uses a multi-level iterative solver, which enables it to effectively solve problems with large deformations, nonlinear material behavior, and contact. Sierra/SM has a versatile library of continuum and structural elements, and a large library of material models. The code is written for parallel computing environments enabling scalable solutions of extremely large problems for both implicit and explicit analyses. It is built on the SIERRA Framework, which facilitates coupling with other SIERRA mechanics codes. This document describes the functionality and input syntax for Sierra/SM.

  1. Sierra/solid mechanics 4.22 user's guide.

    Energy Technology Data Exchange (ETDEWEB)

    Thomas, Jesse David

    2011-10-01

    Sierra/SolidMechanics (Sierra/SM) is a Lagrangian, three-dimensional code for the analysis of solids and structures. It provides capabilities for explicit dynamic and implicit quasistatic and dynamic analyses. The explicit dynamics capabilities allow for the efficient and robust solution of models subjected to large, suddenly applied loads. For implicit problems, Sierra/SM uses a multi-level iterative solver, which enables it to effectively solve problems with large deformations, nonlinear material behavior, and contact. Sierra/SM has a versatile library of continuum and structural elements, and an extensive library of material models. The code is written for parallel computing environments, and it allows for scalable solutions of very large problems for both implicit and explicit analyses. It is built on the SIERRA Framework, which allows for coupling with other SIERRA mechanics codes. This document describes the functionality and input structure for Sierra/SM.

  2. La conducta sexual del carnero. Revisión

    Directory of Open Access Journals (Sweden)

    Agustín Orihuela Trujillo

    2014-01-01

    Full Text Available El presente trabajo tiene como objetivo recapitular la literatura disponible sobre factores que influyen en la conducta sexual del carnero. Incluye una descripción de los fundamentos endocrinos básicos, su manifestación en borregos ferales, así como una breve reseña de las conductas de cortejo y cópula. También abarca una descripción de aquellos efectos que tanto a nivel prenatal como durante la infancia pueden afectar l a vida reproductiva del animal adulto, considerando prácticas de manejo tales como la separación por sexos al momento del destete, y los problemas posteriores de homosexualidad o inadecuda conducta sexual que pueden mostrar en su madurez. Además, se revisan aspectos de dominacia y fotoperiodo, y cómo estos pueden afectar el éxito reproductivo. Se describen aspectos relacionados con la selección del compañero de monta y colección del semen. Finalmente, se documentan algunas pruebas a corral, desarrolladas con el fin de determinar cuáles son los carneros que pueden tener mayor éxito reproductivo en condiciones de campo.

  3. Flora útil de los cafetales en la Sierra Norte de Puebla, México Useful plants of the Sierra Norte de Puebla, Mexico

    Directory of Open Access Journals (Sweden)

    Miguel Ángel Martínez

    2007-06-01

    Full Text Available Los cafetales de la Sierra Norte de Puebla son agroecosistemas variados en composición y estructura, donde se pueden encontrar especies vegetales cultivadas y silvestres, nativas e introducidas, y cuya diversidad florística está estrechamente ligada a las condiciones sociales, económicas y ecológicas en las que se inserta la producción del café. En la última década el cultivo de esta planta ha estado en crisis debido a los bajos precios del producto; sin embargo,los agricultores mantienen los cafetales como fuente de ingreso adoptando nuevas estrategias para obtener recursos económicos mediante la introducción o incremento de cultivos de importancia económica, como pimienta, mamey o plantas medicinales, aprovechando la versatilidad y posibilidades de reorganización de estos agroecosistemas. En este trabajo se presenta el inventario de la flora útil encontrada en cafetales de la SNP. A la fecha están registradas 319 especies pertenecientes a 238 géneros y 99 familias; 90 especies son objeto de comercio y pueden representar nuevas fuentes de ingreso; 256 son nativas y 63 introducidas y se han agrupado en 13 categorías antropocéntricas, de las cuales las medicinales y comestibles son las más numerosas.Coffee plantations in the Sierra Norte de Puebla (SNP are agroecosystems with variable composition and structure. These agroecosystems include native and introduced plant species, as well as cultivated and wild ones. Plant diversity in coffee plantations is closely related to the social, economic, and ecological context into which coffee production is inserted. In the last decade, coffee cultivation has been in crisis due to low prices. Nevertheless, farmers of the SNP maintain their plantations as a source of income, with new strategies such as the introduction or increase of plants with economic value, like allspice (Pimenta dioica, mamey (Pouteria sapota, and medicinal plants, taking advantage of the versatility and possibilities

  4. Presencia del tinamú canelo (Crypturellus cinnamomeus en dos áreas naturales protegidas del centro de Nuevo León, México

    Directory of Open Access Journals (Sweden)

    David Alberto Borré González

    2011-07-01

    Full Text Available Reportamos la presencia de dos individuos de Crypturellus cinnamomeus y proporcionamos evidencia fotográfica de dichos registros en el Monumento Natural Cerro de la Silla y Sierra “Cerro de la Silla”; áreas naturales protegidas de competencia federal y estatal respectivamente que forman parte del corredor biológico de la Sierra Madre Oriental para especies neotropicales. La importancia de la información que proporcionamos aquí sobre los registros realizados el 27 de mayo y 5 de julio de 2011 radica en que constituyen una ampliación en la distribución de esta especie sujeta a protección especial (Pr según la NOM-059-SEMARNAT-2010, y a que se registra por primera vez en ambas vertientes del macizo montañoso Sierra de la Silla.

  5. Effects of Selective Logging on Birds in the Sierra de Coalcoman, Sierra Madre del Sur, Michoacan, Western Mexico

    Science.gov (United States)

    Jose Fernando Villaseñor; Neyra Sosa; Laura Villaseñor

    2005-01-01

    In order to determine the effects of selective logging on pine-oak forest?s bird communities in central-western Mexico, we gathered information through 10-min point counts in plots without wood extraction and sites logged at different times in the past (1, 4, and 8 years). We did not find evidences to argue for effects of logging on bird communities; the study plots...

  6. Nest trees of northern flying squirrels in the Sierra Nevada

    Science.gov (United States)

    Marc D. Meyer; Douglas A. Kelt; Malcolm P. North

    2005-01-01

    We examined the nest-tree preferences of northern flying squirrels (Glaucomys sabrinus) in an old-growth, mixed-conifer and red fir (Abies magnifica) forest of the southern Sierra Nevada of California. We tracked 27 individuals to 122 nest trees during 3 summers. Flying squirrels selected nest trees that were larger in diameter and...

  7. Peruvian Rural School Construction System. SERP 71: Sierra Type.

    Science.gov (United States)

    Cangiano, Miguel

    Based on cooperative action of the government and local communities, the Peruvian Rural School System (SERP 71) evolved from the necessity to reconstruct Peruvian schools of the Sierra region after the earthquake of 1970, and from Peru's new educational reform law (1970) which called for an active-dynamic pupil attitude, continuous updating of…

  8. Indigenous knowledge in cattle breeding in Sierra Leone | Abdul ...

    African Journals Online (AJOL)

    This study was conducted in order to document and preserve valuable indigenous knowledge in cattle breeding and production under traditional cattle production system in Sierra Leone. Data were collected from thirty (30) cattle farms from three locations: Gbindi (16 farms), Sackelereh (7 farms), and Flamansa (7 farms) in ...

  9. Sierra Leone Journal of Biomedical Research Original Article

    African Journals Online (AJOL)

    User

    A publication of the College of Medicine and Allied Health Sciences, University of Sierra ... TESTING (VCT) FOR HIV AMONG NURSING STUDENTS IN ZAMBIA ... All students were aware of where to go for VCT, and 80% .... attitudes that assure patients that they will be .... them better practitioners, but their awareness of.

  10. Young Women's Political Participation in Post-War Sierra Leone ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The end of the civil war in Sierra Leone in 2002 was facilitated in many ways by women through women's pro-democracy movements. These movements will continue to be pivotal in the gradual strengthening of democratic governance structures. Irrespective of the immense barriers that they face, women of all ages have ...

  11. Geology of Sierra de San Miguel area Rocha department (Uruguay)

    International Nuclear Information System (INIS)

    Muzio, R.; Veroslavsky, G.; Morales, E. . E mail: rossana@fcien.edu.uy

    2004-01-01

    This paper is part of a regional study about Mesozoic magmatism, tectonics and sedimentation in Uruguay. As a result of the geological studies carried out in Sierra de San Miguel area (Rocha department), lithological descriptions, their stratigraphic relationships and their petrographic characterization are presented [es

  12. Ecosystems and diversity of the Sierra Madre Occidental

    Science.gov (United States)

    M. S. Gonzalez-Elizondo; M. Gonzalez-Elizondo; L. Ruacho Gonzalez; I. L. Lopez Enriquez; F. I . Retana Renteria; J. A. Tena Flores

    2013-01-01

    The Sierra Madre Occidental (SMO) is the largest continuous ignimbrite plate on Earth. Despite its high biological and cultural diversity and enormous environmental and economical importance, it is yet not well known. We describe the vegetation and present a preliminary regionalization based on physiographic, climatic, and floristic criteria. A confluence of three main...

  13. Diets of California spotted owls in the Sierra National Forest

    Science.gov (United States)

    Thomas E. Munton; Kenneth D. Johnson; George N. Steger; Gary P. Eberlein

    2002-01-01

    From May 1987 through October 1992 and from July through August 1998, we studied diets of California spotted owls (Strix occidentalis occidentalis). Regurgitated pellets were collected at roost and nest sites between 1,000 and 7,600 ft elevation in the Sierra National Forest and were examined for remnant bones, feathers, and insect exoskeletons....

  14. Sierra Leone Journal of Biomedical Research Original Article

    African Journals Online (AJOL)

    User

    recommendations to the health sector of Sierra Leone for it prevention. This retrospective .... pressure. 27% of the population is exposed to 3 to. 5 of these risk factors. According to .... Many studies have identified foot ulcer as the most common ...

  15. Military Interventions in Sierra Leone: Lessons from a Failed State

    National Research Council Canada - National Science Library

    Woods, Larry J; Reese, Timothy R

    2008-01-01

    This study by Larry J. Woods and Colonel Timothy R. Reese analyzes the massive turmoil afflicting the nation of Sierra Leone, 1993-2002, and the efforts by a variety of outside forces to bring lasting stability to that small country...

  16. Health complications of female genital mutilation in Sierra Leone

    Directory of Open Access Journals (Sweden)

    Bjälkander O

    2012-07-01

    Full Text Available Owolabi Bjälkander,1 Laurel Bangura,2 Bailah Leigh,3 Vanja Berggren,1 Staffan Bergström,1 Lars Almroth11Division of Global Health, Department of Public Health, Karolinska Institutet, Stockholm, Sweden; 2Inter Africa Committee, Sierra Leone; 3Department of Community Health, College of Medicine and Allied Health Sciences, University of Sierra Leone, Sierra LeoneAbstract: Sierra Leone has one of the highest rates of female genital mutilation (FGM in the world, and yet little is known about the health consequences of the practice.Purpose: To explore whether and what kind of FGM-related health complications girls and women in Sierra Leone experience, and to elucidate their health care-seeking behaviors.Patients and methods: A feasibility study was conducted to test and refine questionnaires and methods used for this study. Thereafter, a cross-section of girls and women (n = 258 attending antenatal care and Well Women Clinics in Bo Town, Bo District, in the southern region and in Makeni Town, Bombali District, in the northern region of Sierra Leone were randomly selected. Participants answered interview-administrated pretested structured questionnaires with open-ended-questions, administrated by trained female personnel.Results: All respondents had undergone FGM, most between 10 and 14 years of age. Complications were reported by 218 respondents (84.5%, the most common ones being excessive bleeding, delay in or incomplete healing, and tenderness. Fever was significantly more often reported by girls who had undergone FGM before 10 years of age compared with those who had undergone the procedure later. Out of those who reported complications, 187 (85.8% sought treatment, with 89 of them visiting a traditional healer, 75 a Sowei (traditional circumciser, and 16 a health professional.Conclusion: The high prevalence rate of FGM and the proportion of medical complications show that FGM is a matter for public health concern in Sierra Leone. Girls who

  17. Presa de San Esteban de la Sierra

    OpenAIRE

    Aldea Pozas, Miguel

    2012-01-01

    El principal objetivo del proyecto es dimensionar y valorar las obras necesarias para la construcción de una presa destinada a mejorar la regulación así como abastecer a los núcleos de población próximos. El volumen de agua embalsado por la construcción de dicha presa constituirá una reserva para futuros usos en la zona: abastecimiento y desarrollo de regadíos fundamentalmente.

  18. Lassa fever in post-conflict sierra leone.

    Directory of Open Access Journals (Sweden)

    Jeffrey G Shaffer

    2014-03-01

    Full Text Available Lassa fever (LF, an often-fatal hemorrhagic disease caused by Lassa virus (LASV, is a major public health threat in West Africa. When the violent civil conflict in Sierra Leone (1991 to 2002 ended, an international consortium assisted in restoration of the LF program at Kenema Government Hospital (KGH in an area with the world's highest incidence of the disease.Clinical and laboratory records of patients presenting to the KGH Lassa Ward in the post-conflict period were organized electronically. Recombinant antigen-based LF immunoassays were used to assess LASV antigenemia and LASV-specific antibodies in patients who met criteria for suspected LF. KGH has been reestablished as a center for LF treatment and research, with over 500 suspected cases now presenting yearly. Higher case fatality rates (CFRs in LF patients were observed compared to studies conducted prior to the civil conflict. Different criteria for defining LF stages and differences in sensitivity of assays likely account for these differences. The highest incidence of LF in Sierra Leone was observed during the dry season. LF cases were observed in ten of Sierra Leone's thirteen districts, with numerous cases from outside the traditional endemic zone. Deaths in patients presenting with LASV antigenemia were skewed towards individuals less than 29 years of age. Women self-reporting as pregnant were significantly overrepresented among LASV antigenemic patients. The CFR of ribavirin-treated patients presenting early in acute infection was lower than in untreated subjects.Lassa fever remains a major public health threat in Sierra Leone. Outreach activities should expand because LF may be more widespread in Sierra Leone than previously recognized. Enhanced case finding to ensure rapid diagnosis and treatment is imperative to reduce mortality. Even with ribavirin treatment, there was a high rate of fatalities underscoring the need to develop more effective and/or supplemental treatments for

  19. Trypanosomiasis americana en el Perú: III. Importancia del cobayo como reservorio de la enfermedad de Chagas en la región sudoccidental

    Directory of Open Access Journals (Sweden)

    Arístides Herrer

    1955-12-01

    Full Text Available 1. En el Perú, a lo largo de toda la región infestada por el Triatoma infestans, la gente frecuentemente cría cobayos en las mismas habitaciones humanas o en corrales contiguos a éstas. 2. De la estrecha relación existente entre el cobayo y el T. infestans, en lo que concierne a la enfermedad de Chagas el citado roedor adquiere importancia como: a uno de los principales huéspedes del insecto; y b el reservorio más importante del Trypanosoma cruzi. 3. Debido al trasporte del cobayo de unas localidades a otras, deviene también este roedor como activo medio de diseminación del agente etiológico de la enfermedad de Chagas.

  20. El paisaje vegetal de la Sierra de Juan Robre y Jana (Oriente de Asturias

    Directory of Open Access Journals (Sweden)

    Ruiz Fernández, Jesús

    2006-06-01

    Full Text Available This paper is aimed at studying the vegetal formations found in a middle altitude ridge on Eastern Asturias. The characteristics and current distribution of these formations result from a combination of factors such as the climate, the relief, the soil and the systematic human action. Particularly relevant are the beech forests, the evergreen holm oak and the willow groves. Mixed forests of atlantic deciduous leaves species are properly represented, as well as chestnuts and oak groves. However, the most extended vegetal formations are heathers, gorses, ferns and pastures, as a consequence of traditional agricultural practices.

    Se estudian las formaciones vegetales existentes en una sierra de altitud media del oriente asturiano. Las características y la distribución actual de dichas formaciones son el resultado de la combinación de factores como el clima, el relieve, los suelos y la secular intervención humana. Por su elevado interés destacan formaciones como los hayedos, los encinares y las saucedas arbustivas. Los bosques mixtos de frondosas planocaducifolias también están bien representados, al igual que los castañedos y los robledales. No obstante las formaciones que más superficie ocupan son los brezales, los helechales, los aulagares y los pastizales, fruto de las prácticas desarrolladas al amparo del sistema de explotación agrario tradicional.

  1. Las redes de drenaje de los rios Alberche y Guadarrama como indicadores estructurales del Sistema Central Espanol

    Directory of Open Access Journals (Sweden)

    Martín Escorza, C.

    2003-08-01

    Full Text Available The network of the Alberche and Guadarrama rivers, obtained by a semicuantitative method, shows that on the granitic and metamorphic rocks of the Spanish Central System exist circular alignments, until now detected by analysis of satellite image. Such alignments are located in the sub-geological system of the Sierra de Guadarrama, and they coexist with to already known rectilinear alignments. In the sub-westem system, Sierra de Gredos, are detected rectilinear alignments. The circular structures of Sierra de Guadarrarna would have a relationship to geological processes still unknown after the Hercynian Orogeny but before of the Oligocene.Utilizando una metodología semicuantitativa, las redes de drenaje de los ríos Alberche y Guadarrama ponen de manifiesto que existen alineaciones circulares sobre las rocas graníticas y metamórficas de la Cordillera Central, cuya presencia hasta ahora se había detectado por análisis de imagen de satélite. Tales alineaciones se sitúan en el subsistema geológico de la Sierra del Guadarrama, en donde coexisten con alineaciones rectas ya conocidas. En el subsistema occidental, la Sierra de Gredos, se detectan alineaciones rectas. Las estructuras circulares de la Sierra de Guadarrama tendrían su origen en relación con procesos geodinámicos todavía desconocidos, ocurridos con posterioridad a la Orogenia Hercínica, pero antes del Oligoceno.

  2. The vascular flora and floristic relationships of the Sierra de La Giganta in Baja California Sur, Mexico La flora vascular y las relaciones florísticas de la sierra de La Giganta de Baja California Sur, México

    Directory of Open Access Journals (Sweden)

    José Luis León de la Luz

    2008-06-01

    superficie se ha excluido de la sectorización del desierto sonorense y se ha relacionado más con las comunidades del trópico seco de la región del cabo del extremo sur peninsular, pero tal idea no ha sido documentada con formalidad. Hacia la mitad del siglo XX, Annetta Carter, botánica de la Universidad de California, inició exploraciones en la sierra de La Giganta por espacio de 24 años, colectó unos 1 550 números y ayudó a describir varias especies en el área, pero nunca publicó un estudio integral de la flora. Habiendose colectado intensivamente en el área en los últimos años, nuestro objetivo es proporcionar una lista florística y una descripción de la vegetación de dicha serranía. La flora consiste de 729 taxones, en los cuales las formas de vida arbóreas son las menos representadas (3.1%, el endemismo es de nivel moderado (4.4%, y la dominancia de plantas en parcelas de muestreo señala que los árboles y arbustos de la familia Fabaceae son los más importantes. Adicionalmente, dentro de un enfoque biogeográfico, esta flora se compara con otras 5 conocidas; 3 de la Región del Cabo, 1 del Desierto Sonorense y 1 más del matorral espinoso del NO de México. Se concluye que la flora de la sierra de La Giganta tiene una composición mixta; primeramente, de plantas compartidas con el matorral de la región del cabo, pero también con numerosos taxones de la flora de las montañas desérticas del centro de la península, y en menor grado con el matorral desértico del sur de Sonora. Los resultados son congruentes con la idea sobre la existencia de un gradiente florístico que discurre a través de las montañas volcánicas en la mitad sur de la península, que bien puede considerarse como una nueva ecoregión para la península de Baja California.

  3. Una nueva Armeria del Sistema Central (España: A. rivasmartinezii (Plumbaginaceae

    Directory of Open Access Journals (Sweden)

    Sardinero, Santiago

    1997-12-01

    Full Text Available A new taxon from the central-western Sistema Central (Sierra de Béjar and Sierra de Tormantos, Spain, Armeria rivasmartinezii. is described and illustrated. lts morphological affinities and variability are discussed in concordance with its hypothetical hybrid origin.

    Se describe e ilustra un nuevo taxon del centro-occidente del Sistema Central español. Armeria rivasmartinezii. Se discuten sus afinidades morfológicas y variabilidad en concordancia con su hipotético origen híbrido.

  4. Evaluación de recursos hídricos de las sierras Blanca y Mijas (Málaga

    Directory of Open Access Journals (Sweden)

    Vadillo, I.

    1997-04-01

    Full Text Available A water balance of Sierras Blanca and Mijas Hydrogeological Unit, the most important aquifer in the Costa del Sol, in the period 1990/91-1993/94, has been made. The recharge is produced by the infiltration of rain water with a total amount of 116.9 hmhm3/year/year: 60.2 hm3/year has been evapotranspirated, 56.7 hm3/year belongs to the useful rain (8 hm3/year as streamflow and 48.7 hm /year as infiltration. The discharge have been measured and gives a total amount of 62.2 hm3/year: 28.2 hm3/year by the springs and 34 hm3/year by the pumpings. The useful rain has been calculated with several methods (Turc, Coutagne, Kessler, chloride method and monthly and daily Thornwaite method -with field capacities of 25 and 50 mm-. The method that fits in a better way with the known volumes of recharge and discharge, for each one of the aquifer system and for the whole Blanca-Mijas Hydrogeological Unit, is the chloride method.Se ha realizado el balance de la Unidad Hidrogeológica Sierra Blanca-Sierra de Mijas, la más importante de la Costa del Sol, para la media del período 1990/911993/ 94. La precipitación media sobre la Unidad es de 116,9 hm3/año: 60,2 hm3/año se evapotranspiran y 56,7 hm3/año constituyen la lluvia útil (8 hm3/año de escorrentía y 48,7 hm3/año de infiltración eficaz. Las salidas controlables ascienden a 62,2 hm3/año: 28,2 hm3/año se descargan por manantiales y 34 hm3/año por bombeos. La lluvia útil se ha calculado mediante varios métodos (Turc, Coutagne, Kessler, balance de cloruros, Thornwhite diario y mensual -con capacidades de campo de 25 y 50 mm-. El método que más se adapta a los volúmenes conocidos de entradas y salidas, para cada uno de los sistemas acuíferos y para la Unidad Hidrogeológica BlancaMijas en su conjunto, es el balance de cloruros.

  5. Problemática indígena « el ", , " ,, declaración conjunta de las cuatro organizaciones indígenas de la sierra nevada de santa marta para la interlocución con el estado y la sociedad nacional

    Directory of Open Access Journals (Sweden)

    Organización Wiwa Yugumaitm Bunkwanarrwa (owybt

    2014-02-01

    Full Text Available Este documento responde a las preocupaciones comunes de las cuatro organiz"acio..: nes representativas de los pueblos indígenas de la Sierra Nevada (OWYBT, OIK, CIT, OGT, a la hora de trazar el futuro del territorio que desde los inicios del mundo  les fue encomendado por los Padres y Madresespirituales.

  6. El turismo comunitario en la Sierra Norte de Oaxaca: perspectiva desde las instituciones y la gobernanza en territorios indígenas

    Directory of Open Access Journals (Sweden)

    Bertha Palomino Villavicencio

    2016-01-01

    Full Text Available El turismo comunitario representa una opción para el desarrollo económico y social de las zonas rurales de México habitadas por pueblos indígenas. Se trata de emprendimientos productivos que tienen una participación activa de las comunidades en la gestión y los beneficios se distribuyen esencialmente en su contexto local. El presente trabajo se propone explicar los principios del uso y gestión de bienes comunes a partir de la práctica del turismo comunitario. Para ello se identifican los casos registrados en el contexto nacional y se enfatiza en la Sierra Norte de Oaxaca, ámbito donde se ubican experiencias que aportan referentes para la compresión y desempeño de instituciones comunitarias y formas de gobernanza del patrimonio natural y cultural en este segmento.

  7. El Descubrimiento del Origen Carencial del Bocio por Boussingault

    Directory of Open Access Journals (Sweden)

    J. Lavollay

    1987-04-01

    Full Text Available

    (Tomado de: MEDICAMENT A. Revista de estudios y trabajos profesionales de ciencias médicas. Director: Prof. Dr. Pedro Laín Entralgo. Año XII, No. 262, Madrid, Nov. 13, 1954, págs. 315-318.

    Nota Preliminar

    No hace mucho visité en su laboratorio al profesor Lavollay, uno de los mejores bioquímicos de Francia como es bien sabido, y un gran amigo de España. Me leyó entonces unas páginas de Boussingault, su antecesor en la cátedra del Conservatorio de Artes y Oficios de París, sobre el origen del bocio, altamente interesantes. Le animé a que las publicara, y amablemente puso a nuestra disposición el adjunto artículo, que ha traducido el doctor don Antonio Salces.

    Boussingault (1802-1887, discípulo de la Escuela de Minería de Saint-Etienne (Francia, fue muy joven llamado a dirigir una explotación minera inglesa en Nueva Granada. Durante la sublevación de nuestras colonias estuvo agregado al Estado Mayor de Bolívar con el grado de coronel.

    El mismo año que realizó la encuesta que cuenta Lavollay, hizo su ascensión al Chimborazo, muy conocida entre nosotros.

    Vuelto a Francia, ocupó una cátedra de Química en Lyon, y pronto la del Conservatorio de Artes y Oficios de París, que desempeñó hasta su muerte.

    Son notabilísimos sus trabajos sobre Química, Física y Meteorología aplicables a la Agricultura y a la Fisiología vegetal.

    (Nota del profesor J. Ma. del Corral.

    J.B. Boussingault, que con el tiempo llegaría a ser uno de los fundadores de la química agrícola, ha contado (1 cómo tuvo que ocuparse del bocio cuando, siendo joven ingeniero, vivía en América del Sur.

    “El ministro de la Guerra del Gobierno colombiano, después de exponerme los inconvenientes que para el servicio militar ofrecía el bocio, me encargó de investigar el origen de éste. Me permit

  8. Enseñanza y aprendizaje en la antropología de contextos interculturales de la sierra Tarahumara

    Directory of Open Access Journals (Sweden)

    Federico Julián Mancera Valencia

    2016-10-01

    Full Text Available El presente es un informe de investigación realizado en septiembre del 2015 con docentes y alumnos de la Escuela Nacional de Antropología e Historia del Norte de México (ENAHNM Campus Creel ubicado en la sierra Tarahumara. En el que se hace una evaluación psicopedagógica de la práctica docentes y el aprendizaje de alumnos de este espacio educativo. El Proyecto nace de la solicitud de la Subdirección Académica dela ENAHNM al Cuerpo Académico “Desarrollo y gestión intercultural en educación” (DGIE del Centro de Investigación y Docencia (CID, para identificar dificultades, en los ámbitos del currículo, la enseñanza, el aprendizaje y el contexto. Derivado de ello se presentan: 1 la interacción de la docencia y alumnado de la ENAENM-Creel, con las características contextuales; 2 el modelo de organización curricular y la innovación; y 3 los procesos de enseñanza y aprendizaje: las fortalezas y las debilidades, en dos ámbitos: a los estilos de enseñanza; y, b el modo de aprender de los alumnos.

  9. Good laboratory practices guarantee biosafety in the Sierra Leone-China friendship biosafety laboratory

    OpenAIRE

    Wang, Qin; Zhou, Wei-Min; Zhang, Yong; Wang, Huan-Yu; Du, Hai-Jun; Nie, Kai; Song, Jing-Dong; Xiao, Kang; Lei, Wen-Wen; Guo, Jian-Qiang; Wei, He-Jiang; Cai, Kun; Wang, Yan-Hai; Wu, Jiang; Kamara, Gerard

    2016-01-01

    Background The outbreak of Ebola virus disease (EVD) in West Africa between 2014 and 2015 was the largest EDV epidemic since the identification of Ebola virus (EBOV) in 1976, and the countries most strongly affected were Sierra Leone, Guinea, and Liberia. Findings The Sierra Leone-China Friendship Biological Safety Laboratory (SLE-CHN Biosafety Lab), a fixed Biosafety Level 3 laboratory in the capital city of Sierra Leone, was established by the Chinese government and has been active in EBOV ...

  10. Level-2 Milestone 6007: Sierra Early Delivery System Deployed to Secret Restricted Network

    Energy Technology Data Exchange (ETDEWEB)

    Bertsch, A. D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2017-09-06

    This report documents the delivery and installation of Shark, a CORAL Sierra early delivery system deployed on the LLNL SRD network. Early ASC program users have run codes on the machine in support of application porting for the final Sierra system which will be deployed at LLNL in CY2018. In addition to the SRD resource, Shark, unclassified resources, Rzmanta and Ray, have been deployed on the LLNL Restricted Zone and Collaboration Zone networks in support of application readiness for the Sierra platform.

  11. SIERRA/Aero User Manual Version 4.44

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-04-01

    SIERRA/Aero is a compressible fluid dynamics program intended to solve a wide variety compressible fluid flows including transonic and hypersonic problems. This document describes the commands for assembling a fluid model for analysis with this module, henceforth referred to simply as Aero for brevity. Aero is an application developed using the SIERRA Toolkit (STK). The intent of STK is to provide a set of tools for handling common tasks that programmers encounter when developing a code for numerical simulation. For example, components of STK provide field allocation and management, and parallel input/output of field and mesh data. These services also allow the development of coupled mechanics analysis software for a massively parallel computing environment. In the definitions of the commands that follow, the term Real_Max denotes the largest floating point value that can be represented on a given computer. Int_Max is the largest such integer value.

  12. Transient fuel rod behavior prediction with RODEX-3/SIERRA

    Energy Technology Data Exchange (ETDEWEB)

    Billaux, M R; Shann, S H; Swam, L.F. Van [Siemens Power Corp., Richland, WA (United States)

    1997-08-01

    This paper discusses some aspects of the fuel performance code SIERRA (SIEmens Rod Response Analysis). SIERRA, the latest version of the code RODEX-3, has been developed to improve the fuel performance prediction capabilities of the code, both at high burnup and during transient reactor conditions. The paper emphasizes the importance of the mechanical models of the cracked pellet and of the cladding, in the prediction of the transient response of the fuel rod to power changes. These models are discussed in detail. Other aspects of the modelling of high burnup effects are also presented, in particular the modelling of the rim effect and the way it affects the fuel temperature. (author). 12 refs, 5 figs.

  13. Diagnosis of Knowledge Management in the Brisas Sierra Mar hotel

    Directory of Open Access Journals (Sweden)

    Ivón Sosa-Piedra

    2017-06-01

    Full Text Available The present investigation was made in order to evaluate the Knowledge in the Management at Brisas Sierra Mar Hotel, Santiago de Cuba. Due to this, it is being value the actual approaches that was utilized in the existent methodologies for the measurement conduct of the knowledge in the Enterprise Organizations. To fulfill these results we utilized different methods, technical, abilities and scientific investigation tools, such as: analysis-method, synthesis, historical logical, and inducement; technical as a team work, expert judgments, interviews and first and second class information review, as well as the informatics decision programs for the selection and validations of the experts, the Statistic Program for Social Sciences for Windows (SPSS version 15.0 in indicting of the information. The investigation propitiated an evaluation of the actual situation of Brisas Sierra Mar Hotel, Santiago de Cuba and permitted to identify the stage of their main intellectual, placing them in an intermediate level.

  14. Transient fuel rod behavior prediction with RODEX-3/SIERRA

    International Nuclear Information System (INIS)

    Billaux, M.R.; Shann, S.H.; Swam, L.F. Van

    1997-01-01

    This paper discusses some aspects of the fuel performance code SIERRA (SIEmens Rod Response Analysis). SIERRA, the latest version of the code RODEX-3, has been developed to improve the fuel performance prediction capabilities of the code, both at high burnup and during transient reactor conditions. The paper emphasizes the importance of the mechanical models of the cracked pellet and of the cladding, in the prediction of the transient response of the fuel rod to power changes. These models are discussed in detail. Other aspects of the modelling of high burnup effects are also presented, in particular the modelling of the rim effect and the way it affects the fuel temperature. (author). 12 refs, 5 figs

  15. SIERRA/Aero User Manual Version 4.46.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-09-01

    SIERRA/Aero is a compressible fluid dynamics program intended to solve a wide variety compressible fluid flows including transonic and hypersonic problems. This document describes the commands for assembling a fluid model for analysis with this module, henceforth referred to simply as Aero for brevity. Aero is an application developed using the SIERRA Toolkit (STK). The intent of STK is to provide a set of tools for handling common tasks that programmers encounter when developing a code for numerical simulation. For example, components of STK provide field allocation and management, and parallel input/output of field and mesh data. These services also allow the development of coupled mechanics analysis software for a massively parallel computing environment. In the definitions of the commands that follow, the term Real_Max denotes the largest floating point value that can be represented on a given computer. Int_Max is the largest such integer value.

  16. SIERRA/Aero Theory Manual Version 4.44

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-04-01

    SIERRA/Aero is a two and three dimensional, node-centered, edge-based finite volume code that approximates the compressible Navier-Stokes equations on unstructured meshes. It is applicable to inviscid and high Reynolds number laminar and turbulent flows. Currently, two classes of turbulence models are provided: Reynolds Averaged Navier-Stokes (RANS) and hybrid methods such as Detached Eddy Simulation (DES). Large Eddy Simulation (LES) models are currently under development. The gas may be modeled either as ideal, or as a non-equilibrium, chemically reacting mixture of ideal gases. This document describes the mathematical models contained in the code, as well as certain implementation details. First, the governing equations are presented, followed by a description of the spatial discretization. Next, the time discretization is described, and finally the boundary conditions. Throughout the document, SIERRA/ Aero is referred to simply as Aero for brevity.

  17. SIERRA/Aero Theory Manual Version 4.46.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-09-01

    SIERRA/Aero is a two and three dimensional, node-centered, edge-based finite volume code that approximates the compressible Navier-Stokes equations on unstructured meshes. It is applicable to inviscid and high Reynolds number laminar and turbulent flows. Currently, two classes of turbulence models are provided: Reynolds Averaged Navier-Stokes (RANS) and hybrid methods such as Detached Eddy Simulation (DES). Large Eddy Simulation (LES) models are currently under development. The gas may be modeled either as ideal, or as a non-equilibrium, chemically reacting mixture of ideal gases. This document describes the mathematical models contained in the code, as well as certain implementation details. First, the governing equations are presented, followed by a description of the spatial discretization. Next, the time discretization is described, and finally the boundary conditions. Throughout the document, SIERRA/ Aero is referred to simply as Aero for brevity.

  18. Failure of Sierra White granite under general states of stress

    Science.gov (United States)

    Ingraham, M. D.; Dewers, T. A.; Lee, M.; Holdman, O.; Cheung, C.; Haimson, B. C.

    2017-12-01

    The effect of the intermediate principal stress on the failure of Sierra White granite was investigated by performing tests under true triaxial states of stress. Tests were performed under constant Lode angle conditions with Lode angles ranging from 0 to 30°, pure shear to axisymmetric compression. Results show that the failure of Sierra White granite is heavily dependent on the intermediate principal stress which became more dramatic as the mean stress increased. An analysis of the shear bands formed at failure was performed using an associated flow rule and the Rudnicki and Rice (1975) localization criteria. The localization analysis showed excellent agreement with experimental results. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525.

  19. Courtright intrusive zone: Sierra National Forest, Fresno County, California.

    Science.gov (United States)

    Bateman, P.C.; Kistler, R.W.; DeGraff, J.V.

    1984-01-01

    This is a field guide to a well-exposed area of plutonic and metamorphic rocks in the Sierra National Forest, Fresno County, California. The plutonic rocks, of which three major bodies are recognized, besides aplite and pegmatite dykes, range 103 to approx 90 m.y. in age. Points emphasized include cataclastic features within the plutonic rocks, schlieren and mafic inclusions. (M.A. 83M/0035).-A.P.

  20. Hydrographic and chemical observations in the Sierra Leone River estuary

    International Nuclear Information System (INIS)

    Koske, P.H.; Weiler, K.

    1979-01-01

    Hydrographic and chemical observations in the Sierra Leone River estuary are reported, a West-African river in the tropics. Because of the typical change between rainy season in the sommer months and dry season in winter time the research work has been adapted to these semi-annual changes. The collected data and results are given and discussed under this aspect of the seasonal fluctuations. (orig.) [de

  1. Seroprevalence of Ebola virus infection in Bombali District, Sierra Leone

    Directory of Open Access Journals (Sweden)

    Nadege Goumkwa Mafopa

    2017-12-01

    Full Text Available A serosurvey of anti-Ebola Zaire virus nucleoprotein IgG prevalence was carried out among Ebola virus disease survivors and their Community Contacts in Bombali District, Sierra Leone. Our data suggest that the specie of Ebola virus (Zaire responsible of the 2013-2016 epidemic in West Africa may cause mild or asymptomatic infection in a proportion of cases, possibly due to an efficient immune response.

  2. Global solar radiation in Sierra Leone (West Africa)

    International Nuclear Information System (INIS)

    Massaquoi, J.G.M.

    1987-09-01

    A correlation equation of the Angstrom type has been developed to predict the monthly average daily global solar irradiation incident on a horizontal surface in Freetown, Sierra Leone. Measurements of the global insolation have been compared with those predicted using the equation. A good agreement (greater than 95% in most cases) was observed between the measured values and the predicted ones. (author). 15 refs, 2 tabs

  3. Groundwater quality in the Southern Sierra Nevada, California

    Science.gov (United States)

    Fram, Miranda S.; Belitz, Kenneth

    2012-01-01

    Groundwater provides more than 40 percent of California's drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State's groundwater quality and increases public access to groundwater-quality information. The Tehachapi-Cummings Valley and Kern River Valley basins and surrounding watersheds in the Southern Sierra Nevada constitute one of the study units being evaluated.

  4. Groundwater quality in the Central Sierra Nevada, California

    Science.gov (United States)

    Fram, Miranda S.; Belitz, Kenneth

    2012-01-01

    Groundwater provides more than 40 percent of California's drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State's groundwater quality and increases public access to groundwater-quality information. Two small watersheds of the Fresno and San Joaquin Rivers in the Central Sierra Nevada constitute one of the study units being evaluated.

  5. Modelo de sedimentación continental para el rift cretácico de la Argentina central: Ejemplo de la sierra de las Quijadas, San Luis

    OpenAIRE

    D. Rivarola; L. Spalletti

    2006-01-01

    En este trabajo se estudian las sedimentitas continentales cretácicas (Grupo del Gigante) en la sierra de las Quijadas, ubicada en el noroeste de la provincia de San Luis. La información se obtuvo mediante el relevamiento de 15 perfiles sedimentológicos de detalle que permitieron definir 21 facies sedimentarias y 12 asociaciones de facies. Las facies permitieron interpretar los principales procesos de acumulación sedimentaria, mientras que a partir de las asociaciones de facies se propusieron...

  6. Aprendizaje y tecnología. Transferencia y adopción de biodigestores: el caso de las comunidades de la Sierra de Pénjamo, Guanajuato

    OpenAIRE

    Uribe-Morfín, Paulina

    2014-01-01

    El objetivo de esta investigación es conocer las actividades de diversos actores de la Sierra de Pénjamo, Guanajuato, que participan en un proyecto de transferencia y adopción de biodigestores y describir, desde el enfoque sociocultural del aprendizaje, cómo esas actividades configuran esta comunidad de práctica. Se considera que el aprendizaje es una actividad práctica dentro de un sistema eco tecnológico de gestión de recursos relacionados con la energía de la vivienda y la familia. El apre...

  7. Prevalence and determination of risk factors of hoof pathologies and their influence in milk production in Tandil mar and sierras basin

    OpenAIRE

    Confalonieri, O.; Soraci, Alejandro L.; Passucci, J. A.; Rodriguez, E. M.; Becaluba, H. M.; Tapia, M. O.

    2008-01-01

    Las patologías podales que afectan a los bovinos, tienen particular importancia en el ganado lechero. Ante la falta de antecedentes en rodeos de la Cuenca Lechera Mar y Sierras, fue realizado un estudio para determinar la prevalencia, su clasificación y detectar factores de riesgo como también la implicancia de las mismas en la producción láctea. Fueron examinados 24 tambos pertenecientes a dicha cuenca entre marzo y diciembre del 2005.El test de locomoción de Sprecher, D. J. y col.(1997)8, f...

  8. Tecnología de recuperación de sierras de disco para el proceso de la madera // Recovering Technology of circular saws for the wood process

    Directory of Open Access Journals (Sweden)

    F. J. Martínez Rodríguez

    1998-01-01

    Full Text Available Se señala la recuperación de sierras de discos, a partir del estudio de su asignación de servicio y de las condiciones de trabajo.Se recomienda la preparación de la superficie deteriorada y su restauración mediante el método de soldadura por arco eléctricocon electrodo revestido._______________________________________________________________________AbstractThis article shows the way to restore circular saws, based on a study of its duty assignment and working conditions. It issuggested the preparations of the damaged surface and restoration using arc welding method with coated electrodes.

  9. Rendimiento hídrico en cuencas primarias bajo pastizales y plantaciones de pino de las sierras de Córdoba (Argentina)

    OpenAIRE

    Jobbagy Gampel, Esteban Gabriel; Acosta, Ana Mariel; Nosetto, Marcelo Daniel

    2016-01-01

    Los cambios en la cobertura vegetal pueden tener importantes efectos sobre el ciclo hidrológico, afectando la magnitud y distribución temporal del caudal de ríos y arroyos. Estos efectos cobran una relevancia especial en áreas montañosas de regiones secas dado su papel importante en la provisión de agua. Este es el caso de las laderas orientales de las sierras de Córdoba, en donde se establecieron ~35000 ha de plantaciones de pinos en reemplazo de pastizales naturales. Exploramos cómo esta tr...

  10. Reducing CO2 emissions in Sierra Leone and Ghana

    International Nuclear Information System (INIS)

    Davidson, O.

    1991-01-01

    With soring population growth rates and minimal economic growth, the nations of Africa are afflicted with innumerable problems. Why then should Africa's developing countries worry about CO 2 emissions? First, because agricultural activities form the backbone of most African economies; thus, these nations may be particularly vulnerable to the negative impacts of climate change. Second, acting to reduce carbon emissions will bring about more efficient energy use. All of Africa could benefit from the improved use of energy. Finally, the accumulation of CO 2 in the atmosphere is a global problem with individual solutions; in order to reduce international emissions, all countries, including those in Africa, must contribute. Typical of many African countries, Ghana and Sierra Leone have among the lowest levels of energy demand per capita across the globe. primary energy demand per capita in these two West African nations equals about one quarter of the world's average and about one twentieth of the US average. This work summarizes the results of two long-term energy use and carbon emissions scenarios for Sierra Leone and Ghana. In the high emissions (HE) scenario for 2025, policy changes focused on galvanizing economic growth lead to significant increases in energy use and carbon emissions in Ghana and Sierra Leone between 1985 and 2025. In the low emissions (LE) scenario, the implementation of policies aimed specifically at curtailing CO 2 emissions significantly limits the increase in carbon in both nations by 2025

  11. Environmental values and risk: A review of Sierra Club policies

    Energy Technology Data Exchange (ETDEWEB)

    Craig, P.P. [Univ. of California, Davis, CA (United States). Graduate Group in Ecology

    1999-12-01

    Sierra Club values are driven by an overriding environmental ethic. Sierra Club environmental values may be characterized by the concept of 'usufruct' a term favored by United States Founding Father Thomas Jefferson. Usufruct conveys the idea that the environment is ours to use, but not to destroy. Each generation has the obligation to pass on to future generations a world at least as environmentally rich as the one it inherited. It is appropriate to accept risk today in order to preserve the environment for generations yet to come. As viewed through the lens of its formal policies, the Sierra Club is an organization that embraces technology, but insists that technology be evaluated comprehensively, taking full account of both environmental and social externalities. The Club is 'risk averse' with respect to early introduction of technologies seen as likely to have significant negative environmental or social impact. The Club places heavy emphasis on process, which must involve the public meaningfully.

  12. Comunidad, jóvenes y generación: disputando subjetividades en la Sierra Norte de Oaxaca

    Directory of Open Access Journals (Sweden)

    Alejandra Aquino-Moreschi

    2016-01-01

    Full Text Available En este artículo analizamos desde una perspectiva etnográfica, de qué forma se construye y experimenta la juventud en diferentes comunidades ayuujk y zapotecas de la Sierra Norte de Oaxaca, México. En el centro del análisis ubicamos los conflictos generacionales por la definición de subjetividades, en particular, las tensiones que tienen que ver con el cuerpo, las identidades y las apuestas de vida individuales y colectivas. A partir de material etnográfico y entrevistas en profundidad mostramos cómo, si bien los sujetos jóvenes son herederos de las luchas de sus predecesores y mantienen en su mayoría un fuerte compromiso comunitario, también están planteando otras formas de ser joven que desestabilizan las subjetividades y las prácticas establecidas al interior de sus pueblos.

  13. El Estado neoliberal y las mujeres indígenas. Un estudio de caso de la Sierra Negra de Puebla

    Directory of Open Access Journals (Sweden)

    Carolina Muñoz Rodríguez

    2012-01-01

    Full Text Available El presente artículo tiene como objetivo analizar el desarrollo de capacidades en mujeres indígenas de la Sierra Negra de Puebla, producto de la intervención estatal. La metodología empleada fue mixta: una encuesta, tres talleres, ocho entrevistas a profundidad y observación participante. Se identifican cinco instituciones gubernamentales de relevancia para las mujeres: Sedesol, cdi, Sagarpa/sdr, Semarnat e inea. Se constata la fragmentación de programas, los cuales han contribuido (tímida y erráticamente al desarrollo de algunas capacidades. El Estado neoliberal se muestra incapaz de impulsarlas de manera más contundente y ordenada debido a las contradicciones existentes entre la apertura comercial a productos agrícolas del exterior y la política de subsidios diseñados para combatir la pobreza que esta misma apertura generó.

  14. Delineation of the High Enthalpy Reservoirs of the Sierra Nevada Volcanic Geothermal System, South-Central Chile

    Science.gov (United States)

    Alam, M.; Muñoz, M.; Parada, M.

    2011-12-01

    Geothermal system associated with the Pleistocene-Holocene Sierra Nevada volcano (SNVGS) in the Araucanía Region of Chile has surface manifestations from the north-western flank of the volcano, up to Manzanar and Malalcahuello. Baños del Toro, located on the northwestern flank of the volcano, has numerous fumaroles and acid pools (acid sulfate waters, T=~90°C, pH=2.1, TDS=3080 mg/L); while Aguas de la Vaca, near the base of the volcano, has a bubbling spring (chloride-sulfate waters, T=~60°C, pH=7.0, TDS=950 mg/L). Five shallow (Geotermia) of the Ministry of Energy and Mining, Government of Chile.

  15. Restos óseos humanos procedentes de las sierras de Guasayán

    Directory of Open Access Journals (Sweden)

    Drube, Hilton

    2003-01-01

    Full Text Available Los restos óseos humanos que son objeto del presente informe fueron exhumados en el área pedemontana oriental de las sierras de Guasayán, provincia de Santiago del Estero. La información disponible en cuanto a las condiciones del hallazgo y al contexto inhumatorio no es precisa, si bien corresponden a un sitio de ocupación prehispánico. El análisis e identificación de las piezas óseas permite constatar la presencia de al menos tres individuos en el material esqueletal. En efecto, forman parte del conjunto estudiado tres porciones distales de un mismo elemento esqueletal, en este caso correspondientes al húmero derecho. En la asignación de la edad probable de muerte solamente pudo tomarse como elemento diagnóstico el grado de atrición de las piezas dentales y algunos aspectos morfológicos generales de las piezas presentes. Con los datos obtenidos se infieren edades estimadas para el primer caso en 45-50 años; aproximadamente 30 años en el segundo; en tanto que el tercer caso correspondería a un subadulto. Dos de los individuos presentan rasgos morfoscópicos y métricos correspondientes al sexo femenino, en tanto que no existen elementos suficientes para evaluar la expresión dimórfica en el tercer caso. El neurocráneo correspondiente a uno de los individuos presenta deformación artificial del tipo tabular erecta en su variante plano sagital. Los datos recabados en el presente informe revisten carácter preliminar. Un análisis ulterior permitirá develar mayor información, particularmente en cuanto a las modificaciones de origen patológico y tafonómico observables en el material óseo en consideración.

  16. El turista rural en Castilla-La Mancha y el sureste. Tipología frente a infradotación de servicios en las sierras de Murcia y Albacete

    Directory of Open Access Journals (Sweden)

    Aurelio Cebrián Abellán

    2003-01-01

    Full Text Available Con un tipo de turista definido, salvo ligeros matices en las dos regiones, la actividad turística rural en ambas ha optado por rentabilizar el corto plazo, con un buen ejemplo en las sierras aludidas, sobre la base de establecimientos escasamente dimensionados, escasa relevancia de los servicios complementarios, carencia de cualificación de la mano de obra ocupada y desequilibrio espacial de la oferta. Se ha consolidado una actividad que contempla escasamente las necesidades del turista y que se define por la carencia de estrategias para combatir la estacionalidad del sector.

  17. Post-Palaeolithic - Palaeolithic pictorial sequences in the Sierra de San Pedro. International Tagus. Cáceres

    Directory of Open Access Journals (Sweden)

    Bueno Ramírez, Primitiva

    2010-06-01

    Full Text Available The UAH team is developing successive projects of heritage evaluation in the International Tagus, focused on the megalithic culture. Our surveys, based on the theoretical statement of a predictive model that considers the presence of outdoor paintings, make the Sierra de San Pedro one of the most important schematic painting groups of the Iberian Peninsula. Its parallel development to the sites with outdoor engravings in the International Tagus draws a complex set of symbols with a major role in the definition of megalithic territories. The identification of Palaeolithic figures coincides with similar recurrences documented in outdoor sites of the western peninsula, pointing to the resort to the past as one of the arguments of vindication and use of traditional territories.

    El equipo de la UAH viene desarrollando sucesivos proyectos de valoración patrimonial en el Tajo Internacional centrados en la cultura megalítica. Nuestras prospecciones a partir de la exposición teórica de un modelo predictivo que considera la presencia de pinturas al aire libre, hacen de la Sierra de San Pedro uno de los más importantes conjuntos de la pintura esquemática de la Península Ibérica. Su desarrollo paralelo a los yacimientos con grabados al aire libre del Tajo Internacional dibuja un complejo entramado de símbolos con un importante papel en la definición de los territorios megalíticos. La identificación de figuras paleolíticas coincide con recurrencias similares documentadas en los yacimientos al aire libre del occidente peninsular, apuntando al recurso al pasado como uno de los argumentos de reivindicación y uso de territorios tradicionales.

  18. Fitoplancton de embalses subtropicales del noroeste argentino.

    Directory of Open Access Journals (Sweden)

    María Mónica Salusso

    2014-12-01

    Full Text Available Los embalses Cabra Corral y El Tunal de la cuenca del Juramento (ACJ, constituyen los reservorios de mayor relevancia de la provincia de Salta (Argentina. Se analizó la composición y estructura del fitoplancton en ambas presas en febrero, mayo y octubre en el período 1998-2011, utilizando técnicas normalizadas. El inventario algal comprendió un total de 334 spp., siendo los grupos más diversos: Chlorophyta (116, Bacillariophyta (112 y Cianophyta (64. La abundancia y diversidad de especies estuvieron asociadas con los cambios en las descargas de agua. Los valores más altos de riqueza y diversidad específicas, se alcanzaron durante los períodos de lluvias, siendo inversa la situación en estiaje, cuando incrementó la biomasa total; excepto durante los picos de floraciones de Dinophyta. La aparición de cianobacterias con potencial tóxico fue más significativa en el verano tardío y otoño. A pesar de que el número total de especies registrado es alto comparado con otros reservorios subropicales, sólo unas pocas pueden ser consideradas como comunes o frecuentes (Aulacoseira granulata, Cyclotella meneghiniana, Sphaerocystis schroeteri, Chroomonas minuta. La biomasa estuvo asociada a nivel local con las precipitaciones y el manejo del nivel hidrométrico y a nivel regional con el área superficial de los reservorios.

  19. 77 FR 49789 - Record of Decision for Issuing a Presidential Permit to Energia Sierra Juarez U.S. Transmission...

    Science.gov (United States)

    2012-08-17

    ... Energia Sierra Juarez U.S. Transmission, LLC, for the Energia Sierra Juarez U.S. Transmission Line Project...: Record of Decision (ROD). SUMMARY: DOE announces its decision to issue a Presidential permit to Energia... analyzed in the Environmental Impact Statement for the Energia Sierra Juarez U.S. Transmission Line Project...

  20. Desastres, desplazamiento interno y migración laboral en la Sierra de Chiapas

    Directory of Open Access Journals (Sweden)

    Germán MARTÍNEZ-VELASCO

    2016-01-01

    Full Text Available Derivado de un escenario global de cambio climático, el huracán Stan (2005 impactó severa - mente a la región Sierra en el estado de Chiapas y devino en el mayor desplazamiento interno de personas de la entidad. Una parte de la población de la región sufrió una repentina pérdida de sus bienes y fue reubicada en lugares circunvecinos en medio de acciones improvisadas por parte de organismos públicos, sin atender los protocolos internacionales en la materia. Para analizar el proceso de reubicación y sus consecuencias, se llevó a cabo un estudio de desplazados en dos co - munidades denominadas “fraccionamientos”. En los nuevos lugares de asentamiento, los medios de vida existentes fueron más precarios que los de los anteriores lugares de residencia, motivo por el cual los desplazados no han podido acceder a satisfactores de bienestar general ni man - tener el acostumbrado patrón de migración internacional que antes del desplazamiento tenían. En cambio, las actuales condiciones han propiciado una migración tipo commuter , situación que desde décadas atrás, esa misma población había superado.

  1. Curriculum Diversification Re-examined--A Case Study of Sierra Leone.

    Science.gov (United States)

    Wright, Cream A. H.

    This paper deals with a case study of secondary curriculum diversification as a vocationalization strategy in Sierra Leone. It explores diversification issues from four crucial standpoints that are distinct but highly interrelated. First, diversification is dealt with as a policy that was adopted and actively pursued by Sierra Leone for over a…

  2. Increasing elevation of fire in the Sierra Nevada and implications for forest change

    Science.gov (United States)

    Mark W. Schwartz; Nathalie Butt; Christopher R. Dolanc; Andrew Holguin; Max A. Moritz; Malcolm P. North; Hugh D. Safford; Nathan L. Stephenson; James H. Thorne; Phillip J. van Mantgem

    2015-01-01

    Fire in high-elevation forest ecosystems can have severe impacts on forest structure, function and biodiversity. Using a 105-year data set, we found increasing elevation extent of fires in the Sierra Nevada, and pose five hypotheses to explain this pattern. Beyond the recognized pattern of increasing fire frequency in the Sierra Nevada since the late 20th century, we...

  3. Nitrogen dynamics of spring-fed wetland ecosystems of the Sierra Nevada foothills oak woodland

    Science.gov (United States)

    Randall D. Jackson; Barbara Allen-Diaz

    2002-01-01

    Spring-fed wetlands are small, highly productive, patchy ecosystems nested within the oak woodland/annual grassland matrix of the Sierra Nevada foothills. In an effort to place these wetlands in a landscape context, we described seasonal variation (1999-2000 growing season) in nitrogen cycling parameters at 6 spring-fed wetland sites of the Sierra Nevada foothill oak...

  4. A preliminary floristic inventory in the Sierra de Mazatan, Municipios of Ures and Mazatan, Sonora, Mexico

    Science.gov (United States)

    Jose Jesus Sanchez-Escalante; Manuel Espericueta-Betancourt; Reyna Amanda Castillo-Gamez

    2005-01-01

    Presently, the flora of the Sierra de Mazatán contains 357 species of vascular plants distributed in 248 genera and 80 families. The families with the most species are Asteraceae (48), Fabaceae (45), Poaceae (28), Euphorbiaceae (18), and Acanthaceae, Cactaceae, Scrophulariaceae, and Solanaceae (11 each). The results show that the flora of the Sierra de Mazat...

  5. Assessment of Anemia Knowledge, Attitudes and Behaviors among Pregnant Women in Sierra Leone

    Science.gov (United States)

    M'Cormack, Fredanna A. D.; Drolet, Judy C.

    2012-01-01

    Introduction: Iron deficiency anemia prevalence of pregnant Sierra Leone women currently is reported to be 59.7%. Anemia is considered to be a direct cause of 3-7% of maternal deaths and an indirect cause of 20-40% of maternal deaths. This study explores knowledge, attitudes, and behaviors of urban pregnant Sierra Leone women regarding anemia.…

  6. High Sierra Ecosystems: The Role of Fish Stocking in Amphibian Declines

    Science.gov (United States)

    Kathleen Matthews

    2003-01-01

    With a rich diversity of aquatic habitats, including deep lakes, shallow ponds, and rushing streams, Dusy Basinin Sequoia-Kings Canyon National Parks typifies the high Sierra ecosystem where mountain yellow-legged frogs usually thrive. Yet throughout the Sierra, aquatic ecologist Kathleen Matthews found entire water basins empty of these amphibians. Comprehensive...

  7. Transcurrencia a lo largo de la Falla Sierra de Varas (Sistema de fallas de la Cordillera de Domeyko, norte de Chile Strike-slip along the Sierra de Varas Fault (Cordillera de Domeyko Fault-System, northern Chile

    Directory of Open Access Journals (Sweden)

    Hans Niemeyer

    2009-01-01

    Full Text Available El Sistema de Fallas de la Cordillera de Domeyko, de rumbo esencialmente norte-sur, es paralelo a la fosa chileno-peruana en el norte de Chile. Se analizaron los desplazamientos en el rumbo y en la vertical de una de sus fallas maestras: la Falla Sierra de Varas (FS V. Ésta se estudió en el segmento entre Aguada del Hornito y Aguada del Cerro Alto de Varas, sobre la base del desplazamiento en el rumbo de dos porciones de la unidad de Granitoides paleozoicos con idéntica petrografía, estructura interna y edad. Se determinó una separación sinistral horizontal de 15,6±1 km con una componente vertical de 4,9±0,1 km, lo cual implica un rechazo neto sinistral-inverso de 16,4±1 km. El alzamiento vertical está de acuerdo con el espesor estratigráfico erosionado del bloque oriental. Se investigó, además, la dinámica y cinemática de la FS V mediante el análisis de mesofallas asociadas a sus desplazamientos. Se determinó así un sistema estructural sinistral-inverso, que tuvo lugar durante el Eoceno medio tardío. Un segundo sistema estructural dextral, con desplazamiento de 0,6 km se sobrepuso sobre el anterior y ocurrió con posterioridad al Mioceno. Los desplazamientos simultáneos, tanto en el rumbo como según fallas inversas, dados por la existencia de una 'flor inversa en el segmento estudiado, indican que éste fue afectado primeramente por una transpresión. El desplazamiento sinistral demostrado paralaFSVy su cambio de rumbo hacia el SE, inmediatamente al sur de Aguada de Alto de Varas, son compatibles con la vergencia hacia el oeste de pliegues y fallas inversas asociadas del cinturón plegado y corrido de El Profeta, el cual también habría resultado de la transpresión.The north-south trending Cordillera de Domeyko Fault System in northern Chile considered herein is parallel to the Peru-Chile trench. The displacement history of the Sierra de Varas Fault, a master fault of the mentioned system, was examined in detall in the

  8. Viajes comerciales de intercambio en el departamento de Antofagasta de la Sierra, Puna meridional argentina: pasado y presente.

    Directory of Open Access Journals (Sweden)

    García, Silvia P.

    2002-05-01

    Full Text Available Los viajes hacia valles interserranos a lomo de mula fueron una experiencia compartida por todos en esta región de la puna argentina, hasta hace veinte años. En este trabajo se relacionan los datos obtenidos a través de entrevistas a informantes en el departamento de Antofagasta de la Sierra, con los surgidos tras la consulta de las Actas del Registro Civil y se arriba a conclusiones respecto de los vínculos de parentesco que unieron a quienes comerciaban e intercambiaban mercaderías producidas en alturas diferentes. También se compara la situación de entonces con la actualidad. En la capital del departamento los viajes de intercambio han desaparecido casi en su totalidad, en cambio en otras poblaciones del mismo departamento se han modificado incluyendo en ellos a las mercaderías obtenidas por compra y utilizando la sal como principal elemento de canje.

  9. Luchas y reivindicaciones de los Yanaconas en las haciendas de la sierra piurana en los años 1934-1945

    Directory of Open Access Journals (Sweden)

    1991-01-01

    Full Text Available LUTTES ET REVENDICATIONS DES YANACONAS DANS LES HACIENDAS DE LA SIERRA DE PIURA DE 1934 A 1945. En 1934 la lutte des yanaconas commence dans la sierra de Piura quand ils exigent une amélioration et une réglementation de leurs conditions de travail dans les haciendas. Des membres du Parti Socialiste du Pérou conseillent les colonos et appuient leurs revendications. Les paysans des haciendas dirigent leurs réclamations à l’Inspection Régionale du Travail pour obtenir une solution aux conflits entre colonos et propriétaire de l’hacienda. Les documents étudiés permettent de connaître le système laboral des haciendas serranas. En el año 1934 se inicia la lucha de los yanaconas de la sierra de Piura exigiendo el mejoramiento y la reglamentación de sus condiciones de trabajo en las haciendas. Miembros del Partido Socialista del Perú apoyan y asesoran a los colonos en sus reivindicaciones. Los campesinos de las haciendas dirigen sus quejas mediante pliegos de reclamos a la Inspección Regional de Trabajo para obtener una solución a los conflictos entre colonos y patrón de hacienda. El material analizado permite conocer el sistema laboral vigente en las haciendas serranas. STRUGGLES AND CLAIMS OF THE YANACONAS IN THE PIURAN HIGHLAND HACIENDAS DURING THE YEARS 1934-1945. During 1934, the yanacona struggle begins within the Piura Highlands, demanding labor improvement and a fair ruling of the working conditions in the haciendas of the area. Members of the peruvian socialist party supported and advised all peasants over their claims. These people address their complaints to the Regional Working Inspectory in order to obtain a final solution to their labor conflicts. The study of such documents let us learn about the working system in the Highland Haciendas at that time.

  10. Sierra/SolidMechanics 4.48 User's Guide: Addendum for Shock Capabilities.

    Energy Technology Data Exchange (ETDEWEB)

    Plews, Julia A.; Crane, Nathan K; de Frias, Gabriel Jose; Le, San; Littlewood, David John; Merewether, Mark Thomas; Mosby, Matthew David; Pierson, Kendall H.; Porter, Vicki L.; Shelton, Timothy; Thomas, Jesse David; Tupek, Michael R.; Veilleux, Michael; Xavier, Patrick G.

    2018-03-01

    This is an addendum to the Sierra/SolidMechanics 4.48 User's Guide that documents additional capabilities available only in alternate versions of the Sierra/SolidMechanics (Sierra/SM) code. These alternate versions are enhanced to provide capabilities that are regulated under the U.S. Department of State's International Traffic in Arms Regulations (ITAR) export-control rules. The ITAR regulated codes are only distributed to entities that comply with the ITAR export-control requirements. The ITAR enhancements to Sierra/SM in- clude material models with an energy-dependent pressure response (appropriate for very large deformations and strain rates) and capabilities for blast modeling. Since this is an addendum to the standard Sierra/SM user's guide, please refer to that document first for general descriptions of code capability and use.

  11. Evolución metamórfica de los gabros coroníticos de El Arenal, faja máfica-ultramáfica El Destino-Las Águilas, sierra de San Luis Metamorphic evolution of the coronitic gabbrons of the El Arenal, El Destino-Las Aguilas, mafic-ultramafic belt, Sierra de San Luis

    OpenAIRE

    N. Brogioni; G. Cruciani; M. Franceschelli; O. Vaselli

    2007-01-01

    Las meta-melagabronoritas coroníticas se localizan en uno de los cuerpos de El Arenal, pertenecientes a la faja máfica-ultramáfica El Destino-Las Aguilas del flanco oriental de la sierra de San Luis. Son rocas de grano fino y representan fraccionados poco evolucionados, con alto contenido de Cr-Ni y [Mg/Mg+FeT++] comprendidas entre 0,72 y 0,75, derivados de un magma toleítico olivínico de bajo Ti, cuyo emplazamiento precedió a la deformación penetrativa y metamorfismo famatinianos. Las microe...

  12. Implementation of Safeguards and Non-Proliferation in Sierra Leone

    International Nuclear Information System (INIS)

    George, M.

    2015-01-01

    Sierra Leone under the Comprehensive Safeguards Agreements (CSAs) has enacted the Nuclear Safety and Radiation Protection (NSRP) Act 2012 and has given numerous powers to the Authority to implement the above mentioned act fully. The NSRP Act 2012 established the Nuclear Safety and Radiation Protection Authority which among other things to regulate, control and supervise the acquisition, importation, exportation, use, transportation and disposal of radioactive sources and devices emitting Ionizing Radiation. The Authority is bounded by law to cooperate with the International Atomic Energy Agency in the application of Safeguards Agreement and any protocol thereto between Sierra Leone and the International Atomic Energy Agency including conducting inspections and providing any assistance or information required by designated IAEA inspectors in the fulfillment of their responsibilities pursuant to Section 5, Subsection 2, Article xvi of the NSRP Act 2012. The Authority is also granted powers to adopt all necessary measures including a system of licensing to control the export, re-export, transit and transhipment of any nuclear material, equipment or technology in order to protect the safety and security of Sierra Leone. The Regulatory Authority has established departments for the control of nuclear materials: One of which is The Regulatory Control Department; responsible for Inspections, Authorization and Enforcement actions for all radiation sources and nuclear materials. The Authority has been conducting inspections regularly on various facilities ranging from medical radiation generating equipment to industrial radiography sources. The methodology to be used is the issuance of the standard IAEA checklist which is consistent with the Regulatory Authority’s documents for inspection of sources and is in line with the General Safety Requirements(GSR)Part III. The expected outcomes would be increasing training of regulatory authority’s staff, the procurement of

  13. Novel Retinal Lesion in Ebola Survivors, Sierra Leone, 2016.

    Science.gov (United States)

    Steptoe, Paul J; Scott, Janet T; Baxter, Julia M; Parkes, Craig K; Dwivedi, Rahul; Czanner, Gabriela; Vandy, Matthew J; Momorie, Fayiah; Fornah, Alimamy D; Komba, Patrick; Richards, Jade; Sahr, Foday; Beare, Nicholas A V; Semple, Malcolm G

    2017-07-01

    We conducted a case-control study in Freetown, Sierra Leone, to investigate ocular signs in Ebola virus disease (EVD) survivors. A total of 82 EVD survivors with ocular symptoms and 105 controls from asymptomatic civilian and military personnel and symptomatic eye clinic attendees underwent ophthalmic examination, including widefield retinal imaging. Snellen visual acuity was Ebola virus, permitting cataract surgery. A novel retinal lesion following the anatomic distribution of the optic nerve axons occurred in 14.6% (97.5% CI 7.1%-25.6%) of EVD survivors and no controls, suggesting neuronal transmission as a route of ocular entry.

  14. Environmental exposures to agrochemicals in the Sierra Nevada mountain range

    Science.gov (United States)

    LeNoir, J.; Aston, L.; Data, S.; Fellers, G.; McConnell, L.; Sieber, J.

    2000-01-01

    The release of pesticides into the environment may impact human and environmental health. Despite the need for environmental exposure data, few studies quantify exposures in urban areas and even fewer determine exposures to wildlife in remote areas. Although it is expected that concentrations in remote regions will be low, recent studies suggest that even low concentrations may have deleterious effects on wildlife. Many pesticides are known to interfere with the endocrine systems of humans and wildlife, adversely affecting growth, development, and behavior. This chapter reviews the fate and transport of pesticides applied in the Central Valley of California and quantifies their subsequent deposition into the relatively pristine Sierra Nevada Mountain Range.

  15. Subsistence fisheries in the Sierra Manantlán Biosphere Reserve (Jalisco/Colima, Mexico

    Directory of Open Access Journals (Sweden)

    Norman Mercado-Silva

    2011-01-01

    Full Text Available Las reservas de la biósfera enfrentan el doble objetivo de proteger ecosistemas ejemplares y proveer a las comunidades locales con oportunidades de desarrollo. Las pesquerías de subsistencia están presentes en muchas áreas protegidas en México, pero son poco conocidas. Los pescadores de subsistencia tienen pocas oportunidades para expresar sus opiniones acerca de la calidad de los ecosistemas de los cuales dependen para sobrevivir. Utilizamos encuestas para describir las pesquerías de subsistencia del Río Ayuquila, (Jalisco, Colima, México y documentar las perspectivas que los pescadores tienen de la calidad ambiental del río y el manejo que se le da al mismo. La pesquería de subsistencia en el Ayuquila tiene gran importancia para las comunidades rurales de la Reserva de la Biósfera Sierra de Manantlán, pero está poco organizada, y es secundaria en importancia a actividades agropecuarias en la región. La pesquería ha sido afectada por la contaminación y la sobreexplotación, pero esfuerzos realizados por la dirección de la reserva y los gobiernos locales han resultado en mejoras a lo largo del tiempo. Estas mejoras se ven reflejadas en las opiniones que los pescadores tienen acerca de la situación ambiental actual del río, y de las instituciones que se encargan de darle manejo. Describimos cómo procesos regionales han afectado al manejo que se da al río e identificamos áreas donde es posible mejorar su situación. El empoderamiento de los pescadores de subsistencia es posible a través de su participación en encuestas como las que aquí presentamos y que pueden ser utilizadas por instituciones regionales para mejorar las condiciones de vida de los pobladores y las estrategias de conservación de recursos naturales.

  16. Aspectos sociodemográficos e reprodutivos do abortamento induzido de mulheres internadas em uma maternidade do Município da Serra, ES Aspectos socio demográficos y reproductivos del aborto inducido en mujeres internadas en una maternidad del municipio de Sierra, ES Socio demographic and reproductive aspects of the induced miscarriage of women hospitalized in a maternity hospital of serra, state of Espírito Santo

    Directory of Open Access Journals (Sweden)

    Priscilla Rocha Araujo Nader

    2008-12-01

    Full Text Available Objetivo: Comparar aspectos sociodemográficos e reprodutivos entre mulheres que induziram a interrupção da gestação e mulheres que levaram a gestação a termo, admitidas em uma maternidade pública. Métodos: Estudo caso-controle onde foram incluídas 21 mulheres que realizaram abortamento induzido e 83 que tiveram gestação a termo, no período de agosto de 2005 a janeiro de 2006. Resultados: Não houve diferença significativa na comparação entre as freqüências dos grupos em relação à idade, cor da pele, anos de estudo, religião, renda mensal, idade da menarca, idade da coitarca, idade da primeira gestação, número de gestações, intervalo entre a última e a penúltima gestação e o número de filhos vivos. O estado conjugal casada/em união estável [OR=0,241 (IC95% 0,061 0,951] e desejo pela gravidez [OR=0,168 (IC95% 0,042 0,669] mostraram-se associados à ocorrência de abortamento induzido como fatores de proteção. Conclusão: Para atenuar o problema do abortamento inseguro, deve-se investir na promoção da saúde reprodutiva incentivando o acesso à educação sexual e ao planejamento familiar.Objetivo: Comparar aspectos socio demográficos y reproductivos entre mujeres que indujeron la interrupción del embarazo y mujeres que concluyeron el embarazo y fueron admitidas en una maternidad pública. Métodos: Estudio caso-control donde fueron incluidas 21 mujeres que realizaron aborto inducido y 83 que tuvieron la gestión completa, en el período de agosto de 2005 a enero de 2006. Resultados: No hubo diferencia significativa en la comparación entre las frecuencias de los grupos en relación a la edad, color de piel, años de estudio, religión, renta mensual, edad de menopausia, edad de iniciación sexual, edad del primer embarazo, número de embarazos, intervalo entre el último y el penúltimo embarazo y el número de hijos vivos. El estado conyugal casado/a estable [OR=0,241 (IC95% 0,061 0,951] y deseo por el

  17. PROBLEMS IN THE ADMISSION TO HIGHER EDUCATION IN THE LOWER SIERRA DE SONORA, CASE: UNIVERSITY OF SIERRA

    Directory of Open Access Journals (Sweden)

    Rubén Ángel Vásquez-Navarro

    2011-05-01

    Full Text Available The aim of this paper is to clarify the issues and find solutions to align somewhat academic models of institutions of higher average level and above found in the central highlands of the state of Sonora, as are the University of Sierra, and the CBTA 53 and confront the culture of the people of the importance of young people studying a degree in that region.The above educational institutions are located in the geographical catchment area and education, in fact, in the same population, in the northeastern state of Sonora. The mountains of Sonora had always intended to have a school of higher education. To justify the town of Montezuma as a geographically strategic point, and thanks to the efforts made by the governor in turn was as the University of Sierra opens its doors to students on the mountain in August 2002.For the analysis of the functioning of an educational institution in the rural sector, should take into account a wide range of factors, however, this work will be key to analyze the dislocation and inconsistency of educational models from an institution of higher average level in relationship to another level, which serve as a unique educational opportunities for the people of Sonora and surrounding Montezuma. In addition, the cultural aspect, which reflects a regional behavior of the inhabitants of the region. La Sierra University is located in the mountainous region of the state of Sonora, in the town of Montezuma, with a catchment area of more than 30 municipalities in this area, which lacked a college until recently time.

  18. IMPLICACIONES TERRITORIALES DE UNA GRAN OBRA HIDRÁULICA: EL EMBALSE DEL TRANCO (CABECERA DEL GUADALQUIVIR

    Directory of Open Access Journals (Sweden)

    Eduardo Araque Jiménez

    2012-01-01

    Full Text Available Situado en la cabecera del Guadalquivir, el embalse del Tranco fue durante muchos años el de mayor capacidad de almacenamiento de agua de toda Andalucía. Sus aportaciones resultaron fundamentales para el sostenimiento del regadío en el gran valle bético, al tiempo que con sus aguas pudo generarse una parte de la energía eléctrica que se precisaba para la modernización del aparato productivo andaluz y la mejora de las condiciones de vida en multitud de hogares en el valle del Guadalquivir. Frente a estas perspectivas tan halagüeñas, las aguas embalsadas en el Tranco apenas tuvieron repercusiones socioeconómicas positivas para la Sierra de Segura. Las expropiaciones masivas a las que dio origen tanto la construcción del embalse como la repoblación forestal que lo acompañó, propiciaron la emigración masiva de centenares de vecinos, muchas veces en condiciones de extrema precariedad. Por otro lado, las aguas del Tranco nunca se utilizaron para la expansión del regadío por algunos de los fértiles valles próximos al embalse, ni la electricidad generada a pie de presa llegó a los hogares serranos, que siguieron careciendo de este servicio durante muchos años.

  19. Reconstruyendo el itinerario del camino Inca Cajatambo: Pumpu a través del registro arqueológico

    OpenAIRE

    Casaverde Ríos, Guido

    2013-01-01

    El camino Inca investigado pertenece al Sistema Vial Inca de la sierra central, el cual era parte del ramal que se desprendía muy cerca del sitio Inca de Huamachuco por el norte y recorría por todo el Callejón de Huaylas, se dirigía a las localidades de Mangas, Copa, Puquián, Cajatambo, Oyón hasta Pumpu por el sur. Aquel tramo iba de forma paralela al tramo de camino Inca que unía los asentamientos Inca de Huamachuco, Callejón de Conchucos, Huánuco Pampa y Pumpu.

  20. TEJIENDO ENTRE REDES DIVERSAS: REFLEXIONES A PARTIR DE UNA ETNOGRAFÍA MULTISITUADA CON LOS PUEBLOS INDÍGENAS DE LA SIERRA NEVADA DE SANTA MARTA, CARIBE COLOMBIANO

    Directory of Open Access Journals (Sweden)

    Ana Milena Horta Prieto

    2014-06-01

    Full Text Available La Sierra Nevada de Santa Marta, Colombia, es territorio de 4 pueblos indígenas: Kogui, Wiwa, Arhuaco y Kankuamo. Estos comparten la Ley de Sé, orden natural del universo, que en este trabajo se aborda como cosmopolitica (Stengers, a partir de la cual se gestiona la alteridad y se define la función de todos los seres existentes, desde una ontología animista (Descola. Los trabajos espirituales, entre los cuales se cuentan los pagamentos, son rituales en los que se realiza el tejido vital entre entidades, a partir del cual pueden circular los flujos energéticos y de pensamiento, que relacionan mamos (autoridades tradicionales, dueños de los existentes (Jaba y jate, y materiales sagrados, en una relación de intercambio que permite que las partes se reconfiguren y se apropien del sewá (conocimiento que cada uno posee. Algunos de estos materiales han sido removidos del territorio, frente a lo cual las organizaciones indígenas han comenzado un proceso de patrimonialización como estrategia de protección, interactuando con entidades del estado que tienen influencia en la configuración del mismo desde su dominio. En este marco, a partir de la categoría de cosmopolitica y del entendimiento del conocimiento indígena como epistemología, este trabajo reflexiona sobre el posicionamiento del antropóloga/o en ese ordenamiento desde donde se puede tejer entre redes de ontologías diferentes.

  1. WASH activities at two Ebola treatment units in Sierra Leone.

    Directory of Open Access Journals (Sweden)

    Michaela Mallow

    Full Text Available The 2014 outbreak of Ebola virus disease (EVD in West Africa was the largest in history. Starting in September 2014, International Medical Corps (IMC operated five Ebola treatment units (ETUs in Sierra Leone and Liberia. This paper explores how future infectious disease outbreak facilities in resource-limited settings can be planned, organized, and managed by analyzing data collected on water, sanitation, and hygiene (WASH and infection prevention control (IPC protocols.We conducted a retrospective cohort study by analyzing WASH/IPC activity data routinely recorded on paper forms or white boards at ETUs during the outbreak and later merged into a database from two IMC-run ETUs in Sierra Leone between December 2014 and December 2015.The IMC WASH/IPC database contains data from over 369 days. Our results highlight parameters key to designing and maintaining an ETU. High concentration chlorine solution usage was highly correlated with both daily patient occupancy and high-risk zone staff entries; low concentration chlorine usage was less well explained by these measures. There is high demand for laundering and disinfecting of personal protective equipment (PPE on a daily basis and approximately 1 (0-4 piece of PPE is damaged each day.Lack of standardization in the type and format of data collected at ETUs made constructing the WASH/IPC database difficult. However, the data presented here may help inform humanitarian response operations in future epidemics.

  2. Home birth and hospital birth trends in Bo, Sierra Leone.

    Science.gov (United States)

    Jacobsen, Kathryn H; Abdirahman, Hafsa A; Ansumana, Rashid; Bockarie, Alfred S; Bangura, Umaru; Jimmy, David Henry; Malanoski, Anthony P; Sundufu, Abu James; Stenger, David A

    2012-06-01

    As of April 2010, all maternity care at government healthcare facilities in Sierra Leone is provided at no cost to patients. In late 2010, we conducted a community health census of 18 sections of the city of Bo (selected via randomized cluster sampling from 68 total sections). Among the 3421 women with a history of pregnancy who participated in the study, older women most often reported having a history of both home and hospital deliveries, while younger women showed a preference for hospital births. The proportion of lastborn children delivered at a healthcare facility increased from 71.8% of offspring 10-14 years old to 81.1% of those one to nine years old and 87.3% of infants born after April 2010. These findings suggest that the new maternal healthcare initiative has accelerated an existing trend toward a preference for healthcare facility births, at least in some urban parts of Sierra Leone. © 2012 The Authors Acta Obstetricia et Gynecologica Scandinavica© 2012 Nordic Federation of Societies of Obstetrics and Gynecology.

  3. A Method for Snow Reanalysis: The Sierra Nevada (USA) Example

    Science.gov (United States)

    Girotto, Manuela; Margulis, Steven; Cortes, Gonzalo; Durand, Michael

    2017-01-01

    This work presents a state-of-the art methodology for constructing snow water equivalent (SWE) reanalysis. The method is comprised of two main components: (1) a coupled land surface model and snow depletion curve model, which is used to generate an ensemble of predictions of SWE and snow cover area for a given set of (uncertain) inputs, and (2) a reanalysis step, which updates estimation variables to be consistent with the satellite observed depletion of the fractional snow cover time series. This method was applied over the Sierra Nevada (USA) based on the assimilation of remotely sensed fractional snow covered area data from the Landsat 5-8 record (1985-2016). The verified dataset (based on a comparison with over 9000 station years of in situ data) exhibited mean and root-mean-square errors less than 3 and 13 cm, respectively, and correlation greater than 0.95 compared with in situ SWE observations. The method (fully Bayesian), resolution (daily, 90-meter), temporal extent (31 years), and accuracy provide a unique dataset for investigating snow processes. This presentation illustrates how the reanalysis dataset was used to provide a basic accounting of the stored snowpack water in the Sierra Nevada over the last 31 years and ultimately improve real-time streamflow predictions.

  4. Peces del Noroeste del Ecuador

    OpenAIRE

    Barriga, Ramiro

    1994-01-01

    La ictiofauna del occidente del Ecuador es poco conocida. Los peces del noroccidente son diferentes a los del suroccidente del Ecuador. 34 familias y 82 especies fueron colectadas que equivale al 11 % de las especies de peces continentales registradas en el Ecuador. Icteogeográficamente se sabe que la costa ecuatoriana posee dos provincias: la del Pacifico Norte y la del Guayas, se determinó que el límite de las dos provincias es el río Santiago ya que las especies del mencionado río so...

  5. Inventario de Hymenoptera (Hexapoda en El Ventorrillo: un rico enclave de biodiversidad en la Sierra de Guadarrama (España Central

    Directory of Open Access Journals (Sweden)

    Nieves-Aldrey, José Luis

    2003-12-01

    estimated extrapolating overall regional richness data from Spain. The hymenopteran numbers from the inventory are compared with other local richness data from Spain and other surveys from Europe and America. The comparatively high abundance and richness figures at El Ventorrillo are emphasized. Results of the inventory, not yet completed, indicate a very high entomological diversity at the surveyed site, a small relatively well preserved area less than 0.5 km2, that probably is representative of other similar habitats in the Sierra of Guadarrama. This area is, however, under potential menace of alteration by the growing human and urban pressure of the vicinity of Madrid. We urge the politics and nature managers to protect this rich biodiversity spot. We hope that this work can help to support the recent proposal of creation of the National Park of the Sierra of Guadarrama.

    Se presentan los resultados globales del inventario de Hymenoptera llevado a cabo en el área de la Estación Biogeológica de El Ventorrillo, un área natural enclavada a 1450 metros de altitud en el sector central madrileño de la Sierra de Guadarrama. Con un programa de muestreo basado fundamentalmente en el uso de trampas Malaise, y adicionalmente trampas bandeja coloreadas y redes de barrido, llevado a cabo entre los años 1988 y 1991, se colectaron más de 1.000.000 de ejemplares de insectos que han sido ingresados en las colecciones del Museo Nacional de Ciencias Naturales de Madrid. Cerca de 600.000 ejemplares de insectos fueron separados hasta el nivel de orden, de los cuales 83.668 (un 13.8% correspondieron al orden Hymenoptera, siendo después de Diptera (450.000 ejemplares, un 77,5% del total el orden de insectos más numeroso en los muestreos. En las muestras colectadas se han identificado hasta la fecha 49 familias 518 géneros y 1310 especies de Hymenoptera; la riqueza total de himenópteros en las muestras colectadas se estima en más de 2700 especies, y la del conjunto

  6. Pobreza, migración y desempleo: mujeres en la sierra tepehua de Hidalgo, México Pobreza, migración y desempleo: mujeres en la sierra tepehua de Hidalgo, México

    Directory of Open Access Journals (Sweden)

    Pablo Vargas González

    2009-12-01

    Full Text Available For decades, the State of Hidalgo has been considered as an entity with deep social inequalities and scant social, economic and political development. As a result, there are conditions of exclusion, marginalization, racial discrimination and unequal access to the fundamental rights of its citizens; which are still present in the population census data published by Inegi 2000 and 2005.In the State of Hidalgo there are more than 4596 localities, of which 96% are less than 2500 inhabitants; the great majority of them are located in marginal «municipios» and regions and therefore they do not have the minimum indispensable conditions of welfare. But it is not only poverty but exclusion and vulnerability which affect these communities.In the sierra of Tepehua (San Bartolo Tutotepec, Huehuetla y Tenango, the rural communities, mostly indigenous, with agricultural economic vocation live in marginal conditions and the middlemanism —coyotaje— is a persistent flagellum that occurs even in public organisms. However, the rural inhabitants generate response processes to globalization through social capital and the women organisation.Por décadas el estado de Hidalgo ha sido considerado una entidad con profundas desigualdades sociales y escaso desarrollo social, económico y político. Por lo anterior, se observan condiciones de exclusión, marginación, discriminación y de un inequitativo acceso a los derechos fundamentales de los ciudadanos, todavía presentes en las cifras de los censos de población del Inegi de 2000 y 2005.En el estado de Hidalgo existen más de 4.596 localidades de las cuales el 96% son menores de 2500 habitantes, la gran mayoría están ubicadas en municipios y regiones marginadas y por consiguiente carecen del mínimo indispensable de bienestar; pero no solo es la pobreza sino que estas comunidades y sus habitantes se encuentran en condiciones de exclusión y vulnerabilidad.En la sierra tepehua (San Bartolo Tutotepec, Huehuetla

  7. Estudio crítico de los índices de severidad y la superficie afectada por el incendio de Sierra de Luna (Zaragoza

    Directory of Open Access Journals (Sweden)

    R. Guillem-Cogollos

    2017-12-01

    Full Text Available Para la determinación del área quemada y la severidad asociada del incendio de Sierra de Luna (Zaragoza, ocurrido el 4 de julio de 2015, se han calculado tres índices espectrales derivados de Landsat-8: NDVI, NBR y BAI. Comparando los resultados obtenidos por cada uno de ellos, en un incendio con extensas zonas de cultivo entre zonas arboladas, se ha determinado que la combinación de ΔNBR y BAI mejora sustancialmente la determinación del área realmente quemada, tanto en su perímetro exterior como en las zonas aisladas no quemadas de su interior. Para el cálculo de la severidad, se propone una metodología basada en el análisis de las diferencias de NBR, antes y después del incendio, y su combinación con el BAI, en función del valor previo al incendio de los índices NBR y de NDVI.

  8. DNA sequences of troglobitic nicoletiid insects support Sierra de El Abra and the Sierra de Guatemala as a single biogeographical area: Implications for Astyanax

    Directory of Open Access Journals (Sweden)

    Luis Espinasa

    2014-03-01

    Full Text Available The blind Mexican tetra fish, Astyanax mexicanus, has become the most influential model for research of cave adapted organisms. Many authors assume that the Sierra de Guatemala populations and the Sierra de El Abra populations are derived from two independent colonizations. This assumption arises in part from biogeography. The 100 m high, 100 m wide Servilleta Canyon of the Boquillas River separates both mountain ranges and is an apparent barrier for troglobite dispersion. Anelpistina quinterensis (Nicoletiidae, Zygentoma, Insecta is one of the most troglomorphic nicoletiid silverfish insects ever described. 16S rRNA sequences support that this species migrated underground to reach both mountain ranges within less than 12,000 years. Furthermore, literature shows a plethora of aquatic and terrestrial cave restricted species that inhabit both mountain ranges. Thus, the Servilleta canyon has not been an effective biological barrier that prevented underground migration of troglobites between the Sierra de Guatemala and the Sierra de El Abra. The Boquillas River has changed its course throughout time. Caves that in the past connected the two Sierras were only recently geologically truncated by the erosion of the new river course. It is likely that, with the geological changes of the area and throughout the 2-8 million years of evolutionary history of cave Astyanax, there have been opportunities to migrate across the Servilleta canyon.

  9. Experiencia y representaciones del mundo natural e una comunidad andina de Cajamarca

    Directory of Open Access Journals (Sweden)

    Ana De La Torre A.

    1985-12-01

    Full Text Available En este trabajo se exponen algunos aspectos de la organización conceptual del mundo natural en una comunidad campesina en la Sierra Norte del Perú. Se presentan en primer lugar las categorías clasificatorias utilizadas como criterios organizadores de la multiplicidad del mundo sensible en el aspecto de la Flora. Luego se exponen las representaciones colectivas surgidas como elaboraciones ideológicas en base a la organización de la experiencia sensible.

  10. Uranium mining in Sierra Pintada: knowledge, epistemic communities and development

    International Nuclear Information System (INIS)

    Martinez Demarco, S. R.

    2011-01-01

    This paper analyses the conflict triggered by the National Atomic Energy Commission of Argentina (CNEA) proposing to re-open the Mining Complex of Sierra Pintada, in San Rafael, Province of Mendoza. Since 2004 when the Commission submitted the first report to the Ministry of Public Works and Environment of Mendoza to obtain the necessary permission to restart the works in the mine, several protests have taken place and many legal measures were taken in order to stop any resuming attempts. This study argues that, although CNEA has been an epistemic community capable of applying their policy proposals in the nuclear field, their technical knowledge is currently not sufficient to design a policy, and moreover, to hold that they are working for local and sustainable development. Only 'puzzling' 'with actors' paradigms and knowledge is possible to fit together their demands and achieve a public policy, or solution, for this problem. (author) [es

  11. Development of a Pediatric Ebola Predictive Score, Sierra Leone1

    Science.gov (United States)

    Wing, Kevin; Naveed, Asad; Gbessay, Musa; Ross, J.C.G.; Checchi, Francesco; Youkee, Daniel; Jalloh, Mohamed Boie; Baion, David E.; Mustapha, Ayeshatu; Jah, Hawanatu; Lako, Sandra; Oza, Shefali; Boufkhed, Sabah; Feury, Reynold; Bielicki, Julia; Williamson, Elizabeth; Gibb, Diana M.; Klein, Nigel; Sahr, Foday; Yeung, Shunmay

    2018-01-01

    We compared children who were positive for Ebola virus disease (EVD) with those who were negative to derive a pediatric EVD predictor (PEP) score. We collected data on all children <13 years of age admitted to 11 Ebola holding units in Sierra Leone during August 2014–March 2015 and performed multivariable logistic regression. Among 1,054 children, 309 (29%) were EVD positive and 697 (66%) EVD negative, with 48 (5%) missing. Contact history, conjunctivitis, and age were the strongest positive predictors for EVD. The PEP score had an area under receiver operating characteristics curve of 0.80. A PEP score of 7/10 was 92% specific and 44% sensitive; 3/10 was 30% specific, 94% sensitive. The PEP score could correctly classify 79%–90% of children and could be used to facilitate triage into risk categories, depending on the sensitivity or specificity required. PMID:29350145

  12. Ebola Virus Disease in Children, Sierra Leone, 2014–2015

    Science.gov (United States)

    Naveed, Asad; Wing, Kevin; Gbessay, Musa; Ross, J.C.G.; Checchi, Francesco; Youkee, Daniel; Jalloh, Mohammed Boie; Baion, David; Mustapha, Ayeshatu; Jah, Hawanatu; Lako, Sandra; Oza, Shefali; Boufkhed, Sabah; Feury, Reynold; Bielicki, Julia A.; Gibb, Diana M.; Klein, Nigel; Sahr, Foday; Yeung, Shunmay

    2016-01-01

    Little is known about potentially modifiable factors in Ebola virus disease in children. We undertook a retrospective cohort study of children <13 years old admitted to 11 Ebola holding units in the Western Area, Sierra Leone, during 2014–2015 to identify factors affecting outcome. Primary outcome was death or discharge after transfer to Ebola treatment centers. All 309 Ebola virus–positive children 2 days–12 years old were included; outcomes were available for 282 (91%). Case-fatality was 57%, and 55% of deaths occurred in Ebola holding units. Blood test results showed hypoglycemia and hepatic/renal dysfunction. Death occurred swiftly (median 3 days after admission) and was associated with younger age and diarrhea. Despite triangulation of information from multiple sources, data availability was limited, and we identified no modifiable factors substantially affecting death. In future Ebola virus disease epidemics, robust, rapid data collection is vital to determine effectiveness of interventions for children. PMID:27649367

  13. Element Verification and Comparison in Sierra/Solid Mechanics Problems

    Energy Technology Data Exchange (ETDEWEB)

    Ohashi, Yuki; Roth, William

    2016-05-01

    The goal of this project was to study the effects of element selection on the Sierra/SM solutions to five common solid mechanics problems. A total of nine element formulations were used for each problem. The models were run multiple times with varying spatial and temporal discretization in order to ensure convergence. The first four problems have been compared to analytical solutions, and all numerical results were found to be sufficiently accurate. The penetration problem was found to have a high mesh dependence in terms of element type, mesh discretization, and meshing scheme. Also, the time to solution is shown for each problem in order to facilitate element selection when computer resources are limited.

  14. Use of the paca, Cuniculus paca (Rodentia: Agoutidae in the Sierra de Tabasco State Park, Mexico

    Directory of Open Access Journals (Sweden)

    Sonia Gallina

    2012-09-01

    Full Text Available Cuniculus paca is widely distributed throughout the Neotropics. Known as the paca, it is the largest rodent in the Mexican tropical forests, and one of the most used as a subsistence species for its meat. Since colonial times, this species has been subject of an unreported hunting pressure. For this reason, the aim of this work was to describe the use of the paca by the inhabitants of the Sierra de Tabasco State Park (STSP using sampling areas in a matrix of vegetation with different degrees of disturbance, and different types of land use. We included both preserved areas: owing to the presence of large continuous areas of fragmented rainforest and areas that are not preserved, with smaller rainforest fragments and more isolated. To obtain information about paca use, we interviewed 176 people (>18 years old who live in the STSP. All those interviewed had eaten paca meat, and indicated that this species is most frequently observed in the rainforest during the dry season. Hunting and trapping were the most common ways to obtain pacas, rather than gifting or purchasing, and firearms and dogs are used to hunt them. We estimated that these interviewed group had hunted a total of 488 paca in the year prior to the study.Cuniculus paca está ampliamente distribuido en el Neotrópico. El tepezcuintle o paca es el roedor más grande que se encuentra en las selvas tropicales de México. En cuanto a la cacería de subsistencia es una de las especies más buscadas por su carne. Como se desconoce el impacto de esta actividad, se describe el aprovechamiento que le dan las comunidades humanas en el Parque Estatal de la Sierra de Tabasco (PEST. También, se determinaron zonas de muestreo, las cuales se encontraban en una matriz perturbada en menor o mayor grado, con diferentes tipos de uso de suelo. Además, se consideraron zonas conservadas por la presencia continua de grandes extensiones de selvas fragmentadas y las zonas no conservadas por tener fragmentos

  15. Rock-Ice Feature Inventory for the Sierra Nevada, California, USA, Version 1

    Data.gov (United States)

    National Aeronautics and Space Administration — The Sierra Nevada is a tectonic uplift mountain range with a gradual gain in elevation on the west side and a steep escarpment on the east. Most of the mapped...

  16. California; Northern Sierra Air Quality Management District; Approval of Air Plan Revisions; Wood Burning Devices

    Science.gov (United States)

    EPA is taking final action to approve a revision to the Northern Sierra Air Quality Management District (NSAQMD) portion of the California SIP concerning emissions of particulate matter (PM) from wood burning devices.

  17. SIERRA Low Mach Module: Fuego Theory Manual Version 4.44

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-04-01

    The SIERRA Low Mach Module: Fuego along with the SIERRA Participating Media Radiation Module: Syrinx, henceforth referred to as Fuego and Syrinx, respectively, are the key elements of the ASCI fire environment simulation project. The fire environment simulation project is directed at characterizing both open large-scale pool fires and building enclosure fires. Fuego represents the turbulent, buoyantly-driven incompressible flow, heat transfer, mass transfer, combustion, soot, and absorption coefficient model portion of the simulation software. Syrinx represents the participating-media thermal radiation mechanics. This project is an integral part of the SIERRA multi-mechanics software development project. Fuego depends heavily upon the core architecture developments provided by SIERRA for massively parallel computing, solution adaptivity, and mechanics coupling on unstructured grids.

  18. SIERRA Low Mach Module: Fuego Theory Manual Version 4.46.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-09-01

    The SIERRA Low Mach Module: Fuego along with the SIERRA Participating Media Radiation Module: Syrinx, henceforth referred to as Fuego and Syrinx, respectively, are the key elements of the ASCI fire environment simulation project. The fire environment simulation project is directed at characterizing both open large-scale pool fires and building enclosure fires. Fuego represents the turbulent, buoyantly-driven incompressible flow, heat transfer, mass transfer, combustion, soot, and absorption coefficient model portion of the simulation software. Syrinx represents the participating-media thermal radiation mechanics. This project is an integral part of the SIERRA multi-mechanics software development project. Fuego depends heavily upon the core architecture developments provided by SIERRA for massively parallel computing, solution adaptivity, and mechanics coupling on unstructured grids.

  19. SIERRA Low Mach Module: Fuego User Manual Version 4.44

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-04-01

    The SIERRA Low Mach Module: Fuego along with the SIERRA Participating Media Radiation Module: Syrinx, henceforth referred to as Fuego and Syrinx, respectively, are the key elements of the ASCI fire environment simulation project. The fire environment simulation project is directed at characterizing both open large-scale pool fires and building enclosure fires. Fuego represents the turbulent, buoyantly-driven incompressible flow, heat transfer, mass transfer, combustion, soot, and absorption coefficient model portion of the simulation software. Syrinx represents the participating-media thermal radiation mechanics. This project is an integral part of the SIERRA multi-mechanics software development project. Fuego depends heavily upon the core architecture developments provided by SIERRA for massively parallel computing, solution adaptivity, and mechanics coupling on unstructured grids.

  20. SIERRA Low Mach Module: Fuego User Manual Version 4.46.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-09-01

    The SIERRA Low Mach Module: Fuego along with the SIERRA Participating Media Radiation Module: Syrinx, henceforth referred to as Fuego and Syrinx, respectively, are the key elements of the ASCI fire environment simulation project. The fire environment simulation project is directed at characterizing both open large-scale pool fires and building enclosure fires. Fuego represents the turbulent, buoyantly-driven incompressible flow, heat transfer, mass transfer, combustion, soot, and absorption coefficient model portion of the simulation software. Syrinx represents the participating-media thermal radiation mechanics. This project is an integral part of the SIERRA multi-mechanics software development project. Fuego depends heavily upon the core architecture developments provided by SIERRA for massively parallel computing, solution adaptivity, and mechanics coupling on unstructured grids.

  1. Physiochemical characterization of insoluble residues in California Sierra Nevada snow

    Science.gov (United States)

    Creamean, Jessie; Axson, Jessica; Bondy, Amy; Craig, Rebecca; May, Nathaniel; Shen, Hongru; Weber, Michael; Warner, Katy; Pratt, Kerri; Ault, Andrew

    2015-04-01

    The effects atmospheric aerosols have on cloud particle formation are dependent on both the aerosol physical and chemical characteristics. For instance, larger, irregular-shaped mineral dusts efficiently form cloud ice crystals, enhancing precipitation, whereas small, spherical pollution aerosols have the potential to form small cloud droplets that delay the autoconversion of cloudwater to precipitation. Thus, it is important to understand the physiochemical properties and sources of aerosols that influence cloud and precipitation formation. We present an in-depth analysis of the size, chemistry, and sources of soluble and insoluble residues found in snow collected at three locations in the California Sierra Nevada Mountains during the 2012/2013 winter season. For all sites, February snow samples contained high concentrations of regional pollutants such as ammonium nitrate and biomass burning species, while March snow samples were influenced by mineral dust. The snow at the lower elevation sites in closer proximity to the Central Valley of California were heavily influenced by agricultural and industrial emissions, whereas the highest elevation site was exposed to a mixture of Central Valley pollutants in addition to long-range transported dust from Asia and Africa. Further, air masses likely containing transported dust typically traveled over cloud top heights at the low elevation sites, but were incorporated into the cold (-28°C, on average) cloud tops more often at the highest elevation site, particularly in March, which we hypothesize led to enhanced ice crystal formation and thus the observation of dust in the snow collected at the ground. Overall, understanding the spatial and temporal dependence of aerosol sources is important for remote mountainous regions such as the Sierra Nevada where snowpack provides a steady, vital supply of water.

  2. Knowledge of breast cancer in women in Sierra Leone

    Directory of Open Access Journals (Sweden)

    JHEE Shepherd

    2006-09-01

    Full Text Available Breast cancer has been described as one of the life-threatening diseases affecting women and is a major problem in women’s health issues. The unrecorded number of cases of breast lumps and breast cancer observed in women in Sierra Leone prompted the researcher to organize a “Breast Week” during which 1 200 women were educated on breast cancer and the importance of breast health. This research is a follow up of the “Breast Week” which was organized in Freetown, Sierra Leone The specific objective of this study was to assess whether the knowledge and teachings given to the women who participated in this project was fully understood. A sample size of 120 women (10% who participated in the “Breast Week” was obtained through systematic sampling. A quantitative approach was adopted and a structured interview schedule guided the data collection process. The data were processed through use of SPSS and Microsoft Excel. Texts from open ended questions were categorized and frequency counts were applied to the data. It was found that the majority (96.6% of the women had some knowledge of breast cancer. They linked breast cancer to the signs and symptoms associated with it and were able to describe the disease as one that kills women if not promptly detected and/or treated appropriately. Findings indicate that the majority of the women are aware of the dangers of the disease and had knowledge of someone who had died of breast cancer (59.2%. An assessment of the effectiveness of knowledge on breast cancer showed that these women could identify breast cancer as a disease that affects women and may cause death if not detected on time.

  3. Anfibios y reptiles de la sierra de Cuatro Venados, Oaxaca, México

    OpenAIRE

    Martín-Regalado, N.; Lavariega, M. C.; Gómez-Ugalde, R. M.; Rodríguez-Pérez, C.

    2016-01-01

    Amphibians and reptiles of the Sierra de Cuatro Venados, Oaxaca, Mexico We surveyed amphibian and reptile communities in temperate forest in the Sierra de Cuatro Venados to increase knowledge of the Oaxacan herpetofauna. We obtained 193 visual and 106 voucher records during 38 days of fieldwork. During the study, we recorded 36 of the 40 species predicted to occur in this mountain range: nine amphibians and 27 reptiles, five of which represent new records at the regional scale. Pine-o...

  4. Topographic Evolution of the Sierra Nevada Resolved by Inversion of Low-Temperature Thermochronology

    Science.gov (United States)

    McPhillips, D. F.; Brandon, M. T.

    2011-12-01

    At present, there are two competing ideas for the topographic evolution of the Sierra Nevada Range. One idea is that the Sierra Nevada was formed as a monocline in the Cretaceous, marking the transition from the Great Valley forearc basin to the west, and a high Nevadaplano plateau to the east, similar to the west flank of the modern Altiplano of the Andes. Both the thermochronologic signature of local relief and the stable isotopic evidence of a topographic rain shadow support this hypothesis. However, a suite of geomorphic observations suggests that the Sierra gained a large fraction of its present elevation as recently as the Pliocene. This recent surface uplift could have been driven by convective removal of in the lower part of the lithosphere and/or by changes in dynamic topography associated with deep subduction of the Farallon plate. Here we present the first comprehensive analysis of low-temperature thermochronology in the Sierra Nevada, which provides a definitive solution, which indicates that both ideas are likely correct. Our analysis is distinguished by three new factors: The first is that we allow for separate evolutions for the local relief and the long-wavelength topography. Second, we use Al-in-Hb paleobarometry to constrain the initial depth of emplacement for the Sierra Nevada plutons. Third, our analysis is tied to a sea-level reference by using the paleo-bathymetric record of the Great Valley basin, where it on-laps the Sierra Nevada batholith. According to our analysis, westward tilting of the Sierra accounts for 2 km of uplift since 20 Ma. Topographic relief increased by a factor of 2. These findings suggest that the Sierra Nevada lost elevation through most of the Tertiary but regained much of its initial elevation following the onset of surface uplift in the Miocene.

  5. Rebuilding after emergency: Revamping agricultural research in Sierra Leone after civil war

    OpenAIRE

    Asenso-Okyere, Kwadwo; Workneh, Sindu; Rhodes, Edward; Sutherland, John

    2009-01-01

    "The civil war in Sierra Leone, caused by a mix of political, social, and economic factors, had a huge impact on the overall economy in general and on the performance of the agricultural sector in particular. The agricultural research system of Sierra Leone was severely affected by the civil war. Research infrastructure was destroyed, laboratories were damaged and abandoned, and well-trained researchers and scientists fled from the country. With the cessation of hostilities in 2002, the gover...

  6. SierraDNA – Demonstrating the Usefulness of Direct ILS Database Access

    Directory of Open Access Journals (Sweden)

    James Padgett

    2015-10-01

    Full Text Available Innovative Interface’s Sierra(™ Integrated Library System (ILS brings with it a Database Navigator Application (SierraDNA - in layman's terms SierraDNA gives Sierra sites read access to their ILS database. Unlike the closed use cases produced by vendor supplied APIs, which restrict Libraries to limited development opportunities, SierraDNA enables sites to publish their own APIs and scripts based upon custom SQL code to meet their own needs and those of their users and processes. In this article we give examples showing how SierraDNA can be utilized to improve Library services. We highlight three example use cases which have benefited our users, enhanced online security and improved our back office processes. In the first use case we employ user access data from our electronic resources proxy server (WAM to detect hacked user accounts. Three scripts are used in conjunction to flag user accounts which are being hijacked to systematically steal content from our electronic resource provider’s websites. In the second we utilize the reading histories of our users to augment our search experience with an Amazon style “People who borrowed this book also borrowed…these books” feature. Two scripts are used together to determine which other items were borrowed by borrowers of the item currently of interest. And lastly, we use item holds data to improve our acquisitions workflow through an automated demand based ordering process. Our explanation and SQL code should be of direct use for adoption or as examples for other Sierra customers willing to exploit their ILS data in similar ways, but the principles may also be useful to non-Sierra sites that also wish to enhancement security, user services or improve back office processes.

  7. TURISMO SUSTENTABLE DEL PARALELO CERO EN EL ECUADOR: INVENTARIO TURÍSTICO, MERCADOS Y DESARROLLO LOCAL

    Directory of Open Access Journals (Sweden)

    Adriana Tutillo Vallejo

    2015-10-01

    Full Text Available La zona ecuatorial atraviesa de Este a Oeste las cuatro regiones del Ecuador, Amazonía, Sierra, Costa y Galápagos, representando de esta manera una muestra de la gran diversidad natural y cultural del Ecuador. A través del Ministerio de Turismo se busca impulsar el desarrollo de los destinos turísticos asentados a lo largo y alrededor de la Línea Equinoccial a través del proyecto “Ruta Paralelo Cero”. Es por esto que el objetivo de la investigación está encaminado a analizar el inventario de atractivos turísticos, el mercado y el desarrollo local importante para impulsar un turismo sustentable a lo largo de la Línea Equinoccial. A través de métodos geográficos y sociales como la observación directa, entrevistas a expertos locales, encuestas semiestructuradas, levantamiento cartográfico y el uso de sistemas de información geográfica, se analizó los objetivos planteados. Para el estudio se escogieron tres áreas turísticas y sus alrededores, Sierra (Mitad del Mundo, Costa (Pedernales y Amazonía (Reserva del Cuyabeno, éstas representan muestras de la diversidad que tiene el Ecuador. Los resultados mostraron una gran variedad de atractivos naturales y culturales que realzan el potencial turístico del Paralelo Cero. Los atractivos de la Sierra son los más visitados tanto por turistas nacionales como internacionales. En la Costa la demanda es eminentemente nacional, mientras que en la Amazonía es extranjera. El desafio más grande para el turismo sustentable en la nueva ruta es superar la desigualdad del desarrollo local actual.

  8. Avances en la agenda urbana : Santa Cruz de la Sierra

    NARCIS (Netherlands)

    F. Steinberg (Florian); M.L. Garnelo (Maria Luisa); Zwanenburg Maria Zwanenburg (M.)

    2001-01-01

    textabstractEste libro tiene como objetivo principal, presentar algunos trabajos del SINPA que contribuyeron y representan “Avances en la Gestión Urbana”. Estos artículos son fruto de la experiencia del proyecto SINPA como aporte a los cambios y procesos de fortalecimiento de la gestión urbana en el

  9. Noteworthy records of two species of mammals in the Sierra Madre de Oaxaca, Mexico Registros notables de dos especies de mamíferos de la Sierra Madre de Oaxaca, México

    OpenAIRE

    Miguel Briones-Salas; María D. Luna-Krauletz; Ariadna Marín-Sánchez; Jorge Servín

    2006-01-01

    We conducted mammal surveys in the Sierra Madre de Oaxaca (Sierra Norte) in Oaxaca, Mexico, and recorded the occurrence of two conspicuous mammal species: the spider monkey (Ateles geoffroyi vellerosus) and the coyote (Canis latrans cagottis). Spider monkeys has not been previously recorded in the Sierra Madre de Oaxaca, and coyotes have not been previously observed in Mexico at elevations as high as the present one (3 200 mas1) in the Sierra Madre de Oaxaca.Se efectuaron colectas de mamífero...

  10. Biodiversidad de gasterópodos terrestres (Mollusca en el Parque Biológico Sierra de San Javier, Tucumán, Argentina

    Directory of Open Access Journals (Sweden)

    María José Miranda

    2010-09-01

    Full Text Available Se realizó un inventario y se analizaron parámetros de diversidad de la malacofauna terrestre del Parque Biológico Sierra de San Javier. Se llevaron a cabo muestreos cualitativos y cuantitativos en parcelas de 10x10m tomadas en transectas altitudinales, para un total de 22 169 especímenes recolectados. Las identificaciones taxonómicas se llevaron a cabo a nivel de especie. Se construyó una matriz de especies por parcela para analizar patrones de diversidad y se utilizaron estimadores no paramétricos (ICE, ACE, Chao 1 y Chao 2 para calcular la diversidad del Parque, el grado de completitud del muestreo y la agregación espacial de los datos. Se calcularon los índices de Shannon, Simpson, Whittaker y Jaccard. La riqueza del Parque fue estimada en 32 especies distribuidas en 21 géneros y 13 familias. Solo una especie pertenece a Caenogastropoda, el resto son Pulmonados Stylommatophora y Systellommatophora. La familia más representada fue Charopidae mientras que la especie con mayor abundancia relativa fue Adelopoma tucma. La riqueza y diversidad fue levemente mayor en chaco seco que en bosque húmedo de Yungas. Los valores de diversidad obtenidos fueron elevados en comparación con estudios previos realizados en el noroeste Argentino.

  11. COMPORTAMIENTO DEL VIENTO LOCAL DIURNO EN LA CUENCA DEL RÍO LLOBREGAT

    Directory of Open Access Journals (Sweden)

    Jordi Comalrena de Sobregrau Bailina

    2012-01-01

    Full Text Available El estudio de los datos meteorológicos de cinco estaciones representativas de la cuenca del río Llobregat (veranos de 2006, 2007 y 2009 para establecer patro- nes de comportamiento del viento local diurno que puedan ayudar a las tareas de prevención de incendios forestales ha revelado que la marinada es el elemento principal a tener en cuenta sólo en la zona costera y hasta la sierra Prelitoral. El patrón de la zona media y alta de la cuenca (interior responde, en cambio, a la influencia del viento de valle y los vientos de ladera. El sistema de vientos locales de la cuenca del Llobregat supone un factor añadido de riesgo meteoro- lógico de propagación de incendios forestales, dado que la velocidad más alta se detecta durante el período de mayor riesgo: a la temperatura elevada y a la baja humedad hay que sumar, por lo tanto, la velocidad del viento máxima diaria. Sin embargo, la previsibilidad del sistema, la velocidad media baja o moderada y la ausencia de cambios bruscos e imprevistos de velocidad y dirección descartan considerarlo un elemento de importante riesgo por sí mismo.

  12. The metamorphic basement of the southern Sierra de Aconquija, Eastern Sierras Pampeanas: Provenance and tectonic setting of a Neoproterozoic back-arc basin

    Science.gov (United States)

    Cisterna, Clara Eugenia; Altenberger, Uwe; Mon, Ricardo; Günter, Christina; Gutiérrez, Antonio

    2018-03-01

    The Eastern Sierras Pampeanas are mainly composed of Neoproterozoic-early Palaeozoic metamorphic complexes whose protoliths were sedimentary sequences deposited along the western margin of Gondwana. South of the Sierra de Aconquija, Eastern Sierras Pampeanas, a voluminous metamorphic complex crops out. It is mainly composed of schists, gneisses, marbles, calk-silicate schists, thin layers of amphibolites intercalated with the marbles and granitic veins. The new data correlate the Sierra de Aconquija with others metamorphic units that crop out to the south, at the middle portion of the Sierra de Ancasti. Bulk rock composition reflects originally shales, iron rich shales, wackes, minor litharenites and impure limestones as its protoliths. Moreover, comparisons with the northern Sierra de Aconquija and from La Majada (Sierra de Ancasti) show similar composition. Amphibolites have a basaltic precursor, like those from the La Majada (Sierra de Ancasti) ones. The analyzed metamorphic sequence reflects low to moderate weathering conditions in the sediments source environment and their chemical composition would be mainly controlled by the tectonic setting of the sedimentary basin rather than by the secondary sorting and reworking of older deposits. The sediments composition reveal relatively low maturity, nevertheless the Fe - shale and the litharenite show a tendency of minor maturity among them. The source is related to an acid one for the litharenite protolith and a more basic to intermediate for the other rocks, suggesting a main derivation from intermediate to felsic orogen. The source of the Fe-shales may be related to and admixture of the sediments with basic components. Overall the composition point to an upper continental crust as the dominant sediment source for most of the metasedimentary rocks. The protolith of the amphibolites have basic precursors, related to an evolving back-arc basin. The chemical data in combination with the specific sediment association

  13. La pimienta de Jamaica [Pimenta dioica (L. Merrill, Myrtaceae] en la Sierra Norte de Puebla (México

    Directory of Open Access Journals (Sweden)

    Macía Barco, Manuel Juan

    1998-12-01

    Full Text Available Pimenta dioica, allspice, is a neotropical Myrtaceae distributed in Mesoamerica and the Caribbean region. Its área of distribution in México ranges along East and Southeast parts of the country. The main use of its dried fruits is as spice, being sold in Mexican nacional markets as well as exported to Germany, the United States, Jamaica and Great Britain. Most of the harvest comes from trees growing wild in tropical forests, although lately there is a trend to domesticate and cultivate the plant. This paper describes the propagation, domestication, harvesting, processing, marketing and socioeconomic importance of allspice in the Sierra Norte de Puebla (México. The fieldwork has been focused on Totonaca indigenous communities from this area. In these communities, allspice has medicinal use, and is used as a condiment for food; other technological and cultural uses have been also recorded. A historical monograph from Casimiro Gómez Ortega is reviewed. It includes information of the history, botany, cultivation and commerce of allspice.Pimenta dioica es una miliacea neotropical de distribución mesoamericana y caribeña. En México vive hacia el este y sudeste. Sus frutos secos se utilizan como condimento, y se trata de un producto del mercado nacional mexicano que también se exporta a Alemania, Estados Unidos, Jamaica y Reino Unido. Aunque la mayoría de la cosecha proviene de la recolección de los frutos en árboles silvestres del bosque tropical, últimamente se tiende a cultivar esta especie en un proceso actual de domesticación. Se exponen datos sobre propagación, domesticación, cosecha, procesado, mercado e importancia socioeconómica de la pimienta de Jamaica en la Sierra Norte de Puebla (México, a partir de los datos de campo obtenidos principalmente en una comunidad indígena totonaca, en donde se usa como medicinal, en alimentación y en tecnología. Además se reseña una obra de carácter histórico sobre la pimienta de G

  14. FUNGI ASSOCIATED WITH THE DECLINE OF THE MANZANITA (ARCTOSTAPHYLOS PUNGENS HBK. IN THE SIERRA FRIA FROM AGUASCALIENTES STATE, MEXICO

    Directory of Open Access Journals (Sweden)

    O. Moreno-Rico

    2015-11-01

    Full Text Available La manzanita (Arctostaphylos pungens es un arbusto que se encuentra con regularidad en la Sierra Fría del estado de Aguascalientes, México. Este arbusto, al igual que otras plantas silvestres, es afectado por factores bióticos, como las enfermedades, que pueden causar desde daños insignificantes hasta la muerte de las plantas. Los objetivos de este trabajo fueron: 1 identificar los hongos relacionados con el declinamiento de la manzanita en la Sierra Fría de Aguascalientes y 2 conocer la incidencia y severidad de las enfermedades causadas por hongos que afectan tallos y ramas de la manzanita. En cada uno de los sitios visitados se realizó un transecto, de dimensiones variables, en una dirección determinada al azar, que incluyó 100 arbustos, para revisar y estimar: a el porcentaje de plantas sanas, enfermas y muertas, y b la incidencia, severidad y distribución de las enfermedades. Los fitopatógenos se identificaron con base en los síntomas y signos que causan comparándolos con lo reportado en la bibliografía. Las enfermedades más importantes resultaron las causadas por los hongos basidiomicetosInonotus aff. jamaicensisyPhellinus arctostaphyli,que causan pudrición blanca de la madera y cancrosis en la base del tallo y en ramas.Inonotus aff. jamaicensisse encontró en 20 de los 21 sitios muestreados variando su incidencia de 3 a 25%, mientras queP. arctostaphylise encontró en 17 de los 21 sitios muestreados variando su incidencia de 1 a 25%. La severidad de las cancrosis varió de 2 a 44 %. También, se identificaron manchas foliares causadas porHarknessia arctostaphyli,Coccomyces spp., yPassalora spp. Se reporta por primera ocasión la presencia dePhellinus arctostaphylien Aguascalientes. Se reporta por primera vez en México la presencia deInonotus aff. jamaicensis,Harknessia arctostaphyli,Coccomyces spp.yPassalora spp.

  15. Observaciones sobre la composición, ecología, y zoogeografía de la avifauna de la sierra de Chiribiquete, Caqueta, Colombia

    Directory of Open Access Journals (Sweden)

    Stiles Hurd Frank Galfierd

    1995-06-01

    the Andes or the dry upper Magdalena Valley. Only among the latter is there evidence of taxonomic differentiation, resulting in forms endemic to the Sierra de Chiribiquete.Realizamos un inventario de la avifauna de una meseta en la Sierra de Chiribiquete, una serie de mesetas aisladas en la planicie amazónica del sureste colombiano, previamente sin exploraciones ornitológicas. Los hábitats del área de estudio incluyeron sabanas arbustivas y matorrales, y varios tipos de bosque. Se registraron un total de 77 especies para el sitio, y se colectaron 38 especímenes de 25 especies. Fueron notorias la poca diversidad y baja densidad de la avifauna, posiblemente relacionadas con la baja productividad y poca profundidad de los suelos arenosos del área. En general, el número de especies de aves en los distintos hábitats estuvo relacionado con la altura y diversidad estructural y taxonómica de la vegetación, con 20-40 especies en los diferentes tipos de bosques, y 13-16 especies en los sabanas y matorrales. Grupos tróficos bien representados en la avifauna fueron las rapaces, los consumidores de insectos pequeños, y (por lo menos en términos de número de especies, los nectarívoros; las aves frugívoras, granívoras, yacuáticas estuvieron muy pobremente representadas. Familias bien representadas incluyeron Formicariidae, Tyrannidae, y Trochilidae. La poca representación de familias de frugívoras grandes como Psittacidae, Ramphastidae, Cotingidae, etc., y de aves granívoras como Columbidae y Emberizidae, fue notoria. Los oscines en general estuvieron pobremente representados: 8 de las 21 especies registradas eran migrantes boreales. Se registró por primera vez en Colombia a Neomorphus rufipennis. La época reproductiva no habia comenzado aún para la gran mayoría de las especies; es posible que la disponibilidad de recursos, en particular de frutos, estaba en un punto bajo en el área. El grueso de la avifauna consiste de especies con afinidades cercanas con

  16. Evolución metamórfica de los gabros coroníticos de El Arenal, faja máfica-ultramáfica El Destino-Las Águilas, sierra de San Luis

    OpenAIRE

    N. Brogioni; G. Cruciani; M. Franceschelli; O. Vaselli

    2007-01-01

    Las meta-melagabronoritas coroníticas se localizan en uno de los cuerpos de El Arenal, pertenecientes a la faja máfica-ultramáfica El Destino-Las Aguilas del flanco oriental de la sierra de San Luis. Son rocas de grano fino y representan fraccionados poco evolucionados, con alto contenido de Cr-Ni y [Mg/Mg+FeT++] comprendidas entre 0,72 y 0,75, derivados de un magma toleítico olivínico de bajo Ti, cuyo emplazamiento precedió a la deformación penetrativa y metamorfismo famatinianos. Las microe...

  17. El Cuaternario en el macizo de Sierra Nevada. Evolución paleoambiental y paisaje a partir de la interpretación de registros naturales y documentos de época

    OpenAIRE

    Oliva, Marc; Gómez Ortiz, Antonio; Palacios Estremera, David; Salvador Franch, Ferran; Salvà i Catarineu, Montse

    2014-01-01

    El conocimiento relativo a la evolución ambiental cuaternaria en las montañas de la Península Ibérica ha avanzado sustancialmente en las últimas décadas. Particularmente significativos son los progresos realizados en el macizo de Sierra Nevada, en el sur peninsular. En este caso, los investigadores se han servido de registros naturales y fuentes documentales para reconstruir la dinámica ambiental desde la Última Glaciación y posterior deglaciación del macizo hasta su evolución reciente. Los c...

  18. Status sistematico del género geobatrachus ruthven 1915 (amphibia: anura)

    OpenAIRE

    Ardila Robayo, María Cristina

    2012-01-01

    The different familial assignations proposed until now for Geobatracbus are compiled. Through the collection of a virtual topotypical series of this monotypic genus, which is endemic of the NW section of the Sierra Nevada de Santa Marta Massif (Departamento del Magdalena, Colombia), a detailed description was made.  67 morphological characters were selected according to the criteria used by Lynch and Heyer in their studies on the philogeny and classification of the leptodactylid frogs, and su...

  19. South African Ebola diagnostic response in Sierra Leone: A modular high biosafety field laboratory.

    Directory of Open Access Journals (Sweden)

    Janusz T Paweska

    2017-06-01

    Full Text Available In August 2014, the National Institute for Communicable Diseases (NICD in South Africa established a modular high-biosafety field Ebola diagnostic laboratory (SA FEDL near Freetown, Sierra Leone in response to the rapidly increasing number of Ebola virus disease (EVD cases.The SA FEDL operated in the Western Area of Sierra Leone, which remained a "hotspot" of the EVD epidemic for months. The FEDL was the only diagnostic capacity available to respond to the overwhelming demand for rapid EVD laboratory diagnosis for several weeks in the initial stages of the EVD crisis in the capital of Sierra Leone. Furthermore, the NICD set out to establish local capacity amongst Sierra Leonean nationals in all aspects of the FEDL functions from the outset. This led to the successful hand-over of the FEDL to the Sierra Leone Ministry of Health and Sanitation in March 2015. Between 25 August 2014 and 22 June 2016, the laboratory tested 11,250 specimens mostly from the Western Urban and Western Rural regions of Sierra Leone, of which 2,379 (21.14% tested positive for Ebola virus RNA.The bio-safety standards and the portability of the SA FEDL, offered a cost-effective and practical alternative for the rapid deployment of a field-operated high biocontainment facility. The SA FEDL teams demonstrated that it is highly beneficial to train the national staff in the course of formidable disease outbreak and accomplished their full integration into all operational and diagnostic aspects of the laboratory. This initiative contributed to the international efforts in bringing the EVD outbreak under control in Sierra Leone, as well as capacitating local African scientists and technologists to respond to diagnostic needs that might be required in future outbreaks of highly contagious pathogens.

  20. South African Ebola diagnostic response in Sierra Leone: A modular high biosafety field laboratory.

    Science.gov (United States)

    Paweska, Janusz T; Jansen van Vuren, Petrus; Meier, Gunther H; le Roux, Chantel; Conteh, Ousman S; Kemp, Alan; Fourie, Cardia; Naidoo, Prabha; Naicker, Serisha; Ohaebosim, Phumza; Storm, Nadia; Hellferscee, Orienka; Ming Sun, Lisa K; Mogodi, Busisiwe; Prabdial-Sing, Nishi; du Plessis, Desiree; Greyling, Deidre; Loubser, Shayne; Goosen, Mark; McCulloch, Stewart D; Scott, Terence P; Moerdyk, Alexandra; Dlamini, Wesley; Konneh, Kelfala; Kamara, Idrissa L; Sowa, Dauda; Sorie, Samuel; Kargbo, Brima; Madhi, Shabir A

    2017-06-01

    In August 2014, the National Institute for Communicable Diseases (NICD) in South Africa established a modular high-biosafety field Ebola diagnostic laboratory (SA FEDL) near Freetown, Sierra Leone in response to the rapidly increasing number of Ebola virus disease (EVD) cases. The SA FEDL operated in the Western Area of Sierra Leone, which remained a "hotspot" of the EVD epidemic for months. The FEDL was the only diagnostic capacity available to respond to the overwhelming demand for rapid EVD laboratory diagnosis for several weeks in the initial stages of the EVD crisis in the capital of Sierra Leone. Furthermore, the NICD set out to establish local capacity amongst Sierra Leonean nationals in all aspects of the FEDL functions from the outset. This led to the successful hand-over of the FEDL to the Sierra Leone Ministry of Health and Sanitation in March 2015. Between 25 August 2014 and 22 June 2016, the laboratory tested 11,250 specimens mostly from the Western Urban and Western Rural regions of Sierra Leone, of which 2,379 (21.14%) tested positive for Ebola virus RNA. The bio-safety standards and the portability of the SA FEDL, offered a cost-effective and practical alternative for the rapid deployment of a field-operated high biocontainment facility. The SA FEDL teams demonstrated that it is highly beneficial to train the national staff in the course of formidable disease outbreak and accomplished their full integration into all operational and diagnostic aspects of the laboratory. This initiative contributed to the international efforts in bringing the EVD outbreak under control in Sierra Leone, as well as capacitating local African scientists and technologists to respond to diagnostic needs that might be required in future outbreaks of highly contagious pathogens.

  1. A biomass energy flow chart for Sierra Leone

    International Nuclear Information System (INIS)

    Amoo-Gottfried, K.; Hall, D.O.

    1999-01-01

    Terrestrial above-ground biomass production and utilisation in Sierra Leone was analysed for the years 1984/5 to 1990/1. The total production of biomass energy was estimated at an annual average of 131 PJ (39% from agriculture, 51% from forestry and 10% from livestock). Of the 117 PJ produced from agricultural and forestry operations, 37 PJ was harvested as firewood and burnt (10.9 GJ or 0.72 t wood per capita per year, supplying 80% of the country's energy), 12 PJ was harvested for food, 66 PJ was unutilised crop and forestry residues, 3 PJ was harvested crop residues for use directly as fuel, and 2 PJ was harvested and used for industrial purposes and not for fuel. Livestock produced wastes with an energy content of 13 PJ of which only 0.1 PJ was collected and used for fuel. Thus 54 PJ (41%) of the 131 PJ of biomass energy produced annually was actually utilised while 49 PJ remained as unused agricultural residues and dung, and a further 27 PJ was unused forestry residues. The total amount of biomass (fuelwood, residues and dung) used directly to provide energy, mostly in households, was estimated at 40 PJ (11.8 GJ per capita per year of 0.79 t fuelwood equivalent). Direct biomass energy utilisation in agroindustry (0.4 PJ) was negligible in comparison. Two assessments of Sierra Leone's biomass standing stock and MAI (mean annual increment) were examined in order to assess the sustainability of various biomass use scenarios. Large differences were found between the MAI of the two assessments, making it difficult to predict sustainability of biomass production and use. The estimation of total standing stock varied between 227 and 366 Mt and the estimation of MAI varied between 15 and 70 Mt. Analysis of the availability and use of the biomass resource is crucial if biomass energy is to be used on a sustainable basis. A software package has been developed and is available to draft biomass flow charts but further work is needed to incorporate social and economic

  2. Morfología comparada de los dientes humanos fósiles de Ibeas (Sierra de Atapuerca, Burgos

    Directory of Open Access Journals (Sweden)

    Bermúdez de Castro, J. M.

    1987-08-01

    Full Text Available This paper contains a morphological and comparative study of 68 human fossil teeth recovered from the "Sima de los Huesos" site of the Cueva Mayor-Cueva del Silo karst system (Sierra de Atapuerca, Ibeas de Juarros, Burgos. The morphology of the Ibeas teeth conforms with a pattern of expansion of the anterior dentition characterizing all the Middle Pleistocene human populations, and with a pattern of structural reduction of the posterior teeth characterizing the European population of that period. The Ibeas teeth share several morphological traits with those of other European, North African and Asian Middle Pleistocene fossils. However, the tooth morphology of the European group, in which the Ibeas fossils are included, shows remarkable differences with that of the other groups. This fact permits to reinforce the thesis that a distinctive hominid lineage was established in Europe during the Middle Pleistocene. On the other hand, the Ibeas teeth bring forward new evidence to support the hypothesis of a close filogenetic relationship between the Middle Pleistocene European population and the Nearderthals and, accordingly, of a local evolution during that period and the Early Upper Pleistocene.Este trabajo contiene el estudio morfológico comparado de un total de 68 dientes humanos fósiles recuperados en la Sima de los Huesos, yacimiento situado en el sistema kárstico Cueva Mayor-Cueva del Silo (Sierra de Atapuerca, Ibeas de Juarros, Burgos. La morfología de los dientes de Ibeas se ajusta a un modelo de expansión de la dentición anterior que caracteriza a todas las poblaciones humanas del Pleistoceno medio, y a un modelo de reducción estructural de la dentición posterior que caracteriza a la población europea de dicho periodo. Los dientes de Ibeas comparten diversos rasgos morfológicos con los dientes de otros fósiles mesopleistocenos de Europa, norte de Africa y este de Asia. Sin embargo, el grupo europeo, en el que se incluyen los f

  3. EL AVANCE DE LA FRONTERA AGRÍCOLA EN EL ÁREA ADYACENTE AL SISTEMA SIERRAS DE LA VENTANA (BUENOS AIRES, ARGENTINA

    Directory of Open Access Journals (Sweden)

    Mario Fabián Marini

    2008-01-01

    Full Text Available Se determinó el incremento de la superficie agrícola en el área adyacente al Sistema Sierras de la Ventana (Buenos Aires, Argentina. Para ello se emplearon imágenes satelitales Landsat 5 TM de diversas fechas, realizándose una comparación entre la campaña agrícola 1998/ 1999 con respecto a la 2006/ 2007. El análisis llevado a cabo demuestra que existe un incremento en la superficie dedicada a la actividad agrícola que asciende a 55572 has, lo que representa en un aumento del 27,97 %. El mismo es originado principalmente por la propagación de los cultivos de verano, principalmente de la soja, de significativa expansión en la República Argentina en las últimas dos décadas.

  4. Una escultura lítica del Formativo Temprano (1600-1000 AC) de Caraz, Callejón de Huaylas, Perú

    OpenAIRE

    Gamboa, Jorge

    2016-01-01

    El Museo Arqueológico Municipal Hernán Osorio Herrera de la ciudad de Caraz, en la sierra de Ancash, alberga dos esculturas líticas del Período Formativo de los Andes centrales. Este artículo describe la iconografía de uno de esos relieves. Se presenta el estudio estilístico de esa escultura y su comparación con el arte lítico y en barro registrado en diversos asentamientos de la costa y sierra norte y norcentral de Perú. Este análisis permite asignar el relieve de Caraz al Formativo Temprano...

  5. The saltiest springs in the Sierra Nevada, California

    Science.gov (United States)

    Moore, James G.; Diggles, Michael F.; Evans, William C.; Klemic, Karin

    2017-07-20

    The five saltiest springs in the Sierra Nevada in California are found between 38.5° and 38.8° N. latitude, on the South Fork American River; on Caples Creek, a tributary of the Silver Fork American River; and on the North Fork Mokelumne River. The springs issue from Cretaceous granitic rocks in the bottoms of these major canyons, between 1,200- and 2,200-m elevation. All of these springs were well known to Native Americans, who excavated meter-sized basins in the granitic rock, within which they produced salt by evaporation near at least four of the five spring sites. The spring waters are dominated by Cl, Na, and Ca; are enriched relative to seawater in Ca, Li, and As; and are depleted in SO4, Mg, and K. Tritium analyses indicate that the spring waters have had little interaction with rainfall since about 1954. The waters are apparently an old groundwater of meteoric origin that resided at depth before moving up along fractures to the surface of the exhumed granitic rocks. However, along the way these waters incorporated salts from depth, the origin of which could have been either from marine sedimentary rocks intruded by the granitic magmas or from fluid inclusions in the granitic rocks. Prolonged storage at depth fostered water-rock interactions that undoubtedly modified the fluid compositions.

  6. SIERRA Multimechanics Module: Aria User Manual Version 4.42.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2016-10-01

    Aria is a Galerkin finite element based program for solving coupled-physics problems described by systems of PDEs and is capable of solving nonlinear, implicit, transient and direct-to-steady state problems in two and three dimensions on parallel architectures. The suite of physics currently supported by Aria includes thermal energy transport, species transport, and electrostatics as well as generalized scalar, vector and tensor transport equations. Additionally, Aria includes support for manufacturing process flows via the incompressible Navier-Stokes equations specialized to a low Reynolds number (Re %3C 1) regime. Enhanced modeling support of manufacturing processing is made possible through use of either arbitrary Lagrangian- Eulerian (ALE) and level set based free and moving boundary tracking in conjunction with quasi-static nonlinear elastic solid mechanics for mesh control. Coupled physics problems are solved in several ways including fully-coupled Newton's method with analytic or numerical sensitivities, fully-coupled Newton- Krylov methods and a loosely-coupled nonlinear iteration about subsets of the system that are solved using combinations of the aforementioned methods. Error estimation, uniform and dynamic h-adaptivity and dynamic load balancing are some of Aria's more advanced capabilities. Aria is based upon the Sierra Framework.

  7. Sierra Stars Observatory Network: An Accessible Global Network

    Science.gov (United States)

    Williams, Richard; Beshore, Edward

    2011-03-01

    The Sierra Stars Observatory Network (SSON) is a unique partnership among professional observatories that provides its users with affordable high-quality calibrated image data. SSON comprises observatories in the Northern and Southern Hemisphere and is in the process of expanding to a truly global network capable of covering the entire sky 24 hours a day in the near future. The goal of SSON is to serve the needs of science-based projects and programs. Colleges, universities, institutions, and individuals use SSON for their education and research projects. The mission of SSON is to promote and expand the use of its facilities among the thousands of colleges and schools worldwide that do not have access to professional-quality automated observatory systems to use for astronomy education and research. With appropriate leadership and guidance educators can use SSON to help teach astronomy and do meaningful scientific projects. The relatively small cost of using SSON for this type of work makes it affordable and accessible for educators to start using immediately. Remote observatory services like SSON need to evolve to better support education and research initiatives of colleges, institutions and individual investigators. To meet these needs, SSON is developing a sophisticated interactive scheduling system to integrate among the nodes of the observatory network. This will enable more dynamic observations, including immediate priority interrupts, acquiring moving objects using ephemeris data, and more.

  8. SIERRA Multimechanics Module: Aria User Manual Version 4.46.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-09-01

    Aria is a Galerkin fnite element based program for solving coupled-physics problems described by systems of PDEs and is capable of solving nonlinear, implicit, transient and direct-to-steady state problems in two and three dimensions on parallel architectures. The suite of physics currently supported by Aria includes thermal energy transport, species transport, and electrostatics as well as generalized scalar, vector and tensor transport equations. Additionally, Aria includes support for manufacturing process fows via the incompressible Navier-Stokes equations specialized to a low Reynolds number ( %3C 1 ) regime. Enhanced modeling support of manufacturing processing is made possible through use of either arbitrary Lagrangian- Eulerian (ALE) and level set based free and moving boundary tracking in conjunction with quasi-static nonlinear elastic solid mechanics for mesh control. Coupled physics problems are solved in several ways including fully-coupled Newton's method with analytic or numerical sensitivities, fully-coupled Newton- Krylov methods and a loosely-coupled nonlinear iteration about subsets of the system that are solved using combinations of the aforementioned methods. Error estimation, uniform and dynamic h -adaptivity and dynamic load balancing are some of Aria's more advanced capabilities. Aria is based upon the Sierra Framework.

  9. SIERRA Multimechanics Module: Aria User Manual Version 4.44

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-04-01

    Aria is a Galerkin fnite element based program for solving coupled-physics problems described by systems of PDEs and is capable of solving nonlinear, implicit, transient and direct-to-steady state problems in two and three dimensions on parallel architectures. The suite of physics currently supported by Aria includes thermal energy transport, species transport, and electrostatics as well as generalized scalar, vector and tensor transport equations. Additionally, Aria includes support for manufacturing process fows via the incompressible Navier-Stokes equations specialized to a low Reynolds number ( %3C 1 ) regime. Enhanced modeling support of manufacturing processing is made possible through use of either arbitrary Lagrangian- Eulerian (ALE) and level set based free and moving boundary tracking in conjunction with quasi-static nonlinear elastic solid mechanics for mesh control. Coupled physics problems are solved in several ways including fully-coupled Newton's method with analytic or numerical sensitivities, fully-coupled Newton- Krylov methods and a loosely-coupled nonlinear iteration about subsets of the system that are solved using combinations of the aforementioned methods. Error estimation, uniform and dynamic h -adaptivity and dynamic load balancing are some of Aria's more advanced capabilities. Aria is based upon the Sierra Framework.

  10. A Self-Assessment of the Effectiveness to Control Radiation Sources in Sierra Leone

    Energy Technology Data Exchange (ETDEWEB)

    Bun-Tejan, Umaru Remilekun [KAIST, Daejeon (Korea, Republic of); Lee, Byung Soo [Korea Institute of Nuclear Safety, Daejeon (Korea, Republic of)

    2016-10-15

    There is an urgent need to effectively control sources of ionizing radiation. Sources of ionizing radiation pose serious occupational, public health, and environmental consequences, if not properly controlled. The government of Sierra Leone knows the importance of controlling these sources of ionizing radiation and of establishing an independent Nuclear Safety Infrastructure. Sierra Leone has no nuclear facilities but, it is rapidly developing its infrastructure in order to obtain nuclear technology. However, the regulatory effectiveness in controlling radiation risk is essential for the International Atomic Energy Agency to allow the transfer of nuclear technology. For this reason, this study will evaluate the status of the regulatory authority in Sierra Leone to control radiation risk. The International Atomic Energy Agency (IAEA) review mission to Sierra Leone found that the RPBA did not give sufficient enforcement powers to the Board Secretariat. The research evaluated the status of the regulatory authority of Sierra Leone. The status of the regulatory authority was evaluated against several parameters including management systems, regulatory processes, authorization, inspection, and enforcement. The ability to effectively control ionizing radiation sources depends on the status of the regulatory body. The Integrated Regulatory Review Service Report on Sierra Leone led us to infer that there is a need for the regulatory authority to rapidly improve its ability to control ionizing radiation sources in the country. The findings however, revealed that the overall strengths of the regulatory body in Sierra Leone slightly outnumber the weaknesses. Management systems have a ratio of 0.85:1 of strengths to weaknesses. This ratio makes management systems the weakest parameter evaluated. Thus there is need for stronger collaboration between management staff. The Regulatory processes have a ratio of 1.3:1, authorizations have a ratio of 4.3:1, inspections have ratio of 2

  11. A Self-Assessment of the Effectiveness to Control Radiation Sources in Sierra Leone

    International Nuclear Information System (INIS)

    Bun-Tejan, Umaru Remilekun; Lee, Byung Soo

    2016-01-01

    There is an urgent need to effectively control sources of ionizing radiation. Sources of ionizing radiation pose serious occupational, public health, and environmental consequences, if not properly controlled. The government of Sierra Leone knows the importance of controlling these sources of ionizing radiation and of establishing an independent Nuclear Safety Infrastructure. Sierra Leone has no nuclear facilities but, it is rapidly developing its infrastructure in order to obtain nuclear technology. However, the regulatory effectiveness in controlling radiation risk is essential for the International Atomic Energy Agency to allow the transfer of nuclear technology. For this reason, this study will evaluate the status of the regulatory authority in Sierra Leone to control radiation risk. The International Atomic Energy Agency (IAEA) review mission to Sierra Leone found that the RPBA did not give sufficient enforcement powers to the Board Secretariat. The research evaluated the status of the regulatory authority of Sierra Leone. The status of the regulatory authority was evaluated against several parameters including management systems, regulatory processes, authorization, inspection, and enforcement. The ability to effectively control ionizing radiation sources depends on the status of the regulatory body. The Integrated Regulatory Review Service Report on Sierra Leone led us to infer that there is a need for the regulatory authority to rapidly improve its ability to control ionizing radiation sources in the country. The findings however, revealed that the overall strengths of the regulatory body in Sierra Leone slightly outnumber the weaknesses. Management systems have a ratio of 0.85:1 of strengths to weaknesses. This ratio makes management systems the weakest parameter evaluated. Thus there is need for stronger collaboration between management staff. The Regulatory processes have a ratio of 1.3:1, authorizations have a ratio of 4.3:1, inspections have ratio of 2

  12. Vegetación de las pilas o pilancones de la sierra de Guadarrama y La Serena (España

    Directory of Open Access Journals (Sweden)

    Baonza Díaz, Jorge

    2009-06-01

    Full Text Available Weathering pits are wetlands of geomorphologic and biological interest, but this common fact is obscured by the different names used by biologists, such as the ambiguous name of rock pool. Aquatic or amphibious plant communities are known around the world, principally from SE North-America and Tropical Africa, but few are known from Spain. Here, I study the vegetation of weathering pits from two different localities: La Serena (Southweast Spain and Sierra de Guadarrama (central Spain. Plant communities change with depth of water and depth of sediment in the weathering pits. Some of them are characterized by Crassula vaillantii or Isoetes velatum.Las pilas o pilancones son unos humedales de interés tanto geomorfológico como biológico, aunque esta identidad ha pasado inadvertida por haberse usado distintas denominaciones en cada campo científico. Las comunidades acuáticas o anfibias vegetales de los pilancones han sido estudiadas en diversas partes del mundo, especialmente en el SE de Norteamérica y en África tropical, pero apenas hay referencias de España. En el presente trabajo se estudia la vegetación encontrada en los pilancones de dos zonas distantes, La Serena (Badajoz y la sierra de Guadarrama (Madrid. Estas comunidades varían según el nivel de máxima inundación que alcanza la pila y la profundidad del sedimento, con comunidades dominadas por Crassula vaillantii o Isoetes velatum, entre otras.

  13. Recurrencia histórica de peces invasores en la Reserva de la Biósfera Sierra de Huautla, México Historical presence of invasive fish in the Biosphere Reserve Sierra de Huautla, Mexico

    Directory of Open Access Journals (Sweden)

    Humberto Mejía-Mojica

    2012-06-01

    Full Text Available Los efectos de las especies invasoras en los ecosistemas nativos son variados, y estos se han vinculado con la desaparición o disminución de la fauna nativa, cambios en la estructura de la comunidad, modificación de los ecosistemas y como vectores de nuevas enfermedades y parásitos. El desarrollo del comercio de especies para uso ornamental ha contribuido significativamente a la importación e introducción de peces invasores en algunas áreas importantes para la conservación de la biodiversidad en México, pero la presencia de estas especies está escasamente documentada. En este estudio se analiza la comunidad de peces en la reserva de Biosfera Sierra de Huautla, registrando los cambios en la diversidad en los últimos 100 años. Con bases de datos de registros históricos y recientes colecciones para cinco sitios en el río Amacuzac, que cruza la zona de reserva de la Biosfera, se comparan los valores de similitud (índice de Jaccard entre cinco series de tiempo (1898-1901, 1945-1953, 1971-1980, 1994-1995 y 2008-2009, así mismo, obtuvimos los valores de similitud (Bray-Curtis entre los cinco sitios analizados. En total hemos reconocido 19 especies para el área, diez nativas y nueve no nativas, de las cuales tres están extirpadas para el área, los valores de similitud entre los primeros registros y los actuales son muy bajos (0.27, los principales cambios en la composición de la fauna se han producido en los últimos 20 años. Los valores de abundancia, diversidad y similitud entre los sitios de muestreo, indican el predominio de especies no nativas. Discutimos el papel del comercio de peces ornamentales de la región como la principal causa de introducción de invasoras en el ecosistema, y los posibles efectos negativos que han tenido al menos cuatro especies en la fauna nativa y el ecosistema (Oreochromis mossambicus, Amatitlania nigrofasciata, Pterygoplichthys disjunctivus y P. pardalis, se hace notar la ausencia de programas de

  14. Southern Sierra Nevada Continental Dynamics Project: 1993 field observations of the NPE

    Energy Technology Data Exchange (ETDEWEB)

    Keller, G.R. [Univ. of Texas, El Paso, TX (United States); Malin, P.E. [Duke Univ., Durham, NC (United States); Ruppert, S.D. [LLNL, Livermore, CA (United States)

    1994-12-31

    The Southern Sierra Nevada Continental Dynamics Project is a multidisciplinary, multi-institutional investigation of the cause of the uplift of the Sierra Nevada and its relationship to extension in the adjacent Basin and Range. A broad range of geologic and geophysical data have been collected as part of this project. These data include both passive and active seismic measurements, as well as gravity and magnetotelluric observations. Three seismic refraction/wide-angle reflection profiles were recorded: (1) a 325-km-long, north-south profile extending from just east of Mono Lake south across the Garlock fault, (2) a 400-km-long, east-west profile extending from Death Valley west across the Sierra Nevada to near the San Andreas fault, and (3) a 480-km-long, east-west profile deployed for the NPE. This profile extended from Beatty, Nevada, west across the Sierra Nevada along the previously recorded east-west profile and continued nearly to the Pacific Ocean. Up to 675 seismic recorders were deployed for each profile. These data are allowing us to develop refined models of the crustal and upper mantle structure of the southern Sierra Nevada and to evaluate alternative hypotheses for its uplift and for Basin and Range extension. They also provide insight into the propagation of regional phases across complex structures.

  15. Patrimonio arqueológico, preservación y turismo. El caso de las Sierras de Curicó (Sistema de Tandilia, Región Pampeana, Argentina

    Directory of Open Access Journals (Sweden)

    Patricia Madrid

    2014-06-01

    Full Text Available El propósito de este artículo es discutir los efectos positivos y negativos del uso de la localidad arqueológica Sierras de Curicó (partido de Olavarría, provincia de Buenos Aires, Argentina en el marco de potenciales emprendimientos turísticos. El atractivo natural de este paisaje arqueológico conformado por pinturas rupestres, estructuras de piedra, un montículo rocoso y un alero, en las serranías bajas de Tandilia, ha concitado desde hace algunos años un uso recreativo espontáneo en un área no planificada para su uso turístico. En efecto, al impacto natural creciente se suma la acción antrópica cada vez más frecuente, poniendo a la localidad arqueológica en situación de vulnerabilidad y riesgo de conservación. Esto se acentúa particularmente en el caso de las representaciones rupestres, que constituyen sectores de visibilidad regular y altamente sensibles a la atención del visitante. En este contexto, es primordial evaluar la preservación del paisaje arqueológico como un todo antes de considerar su inclusión en proyectos de desarrollo sustentable que incluyan actividades turísticas. Previo diagnóstico, se analizan las estrategias mas adecuadas para poner en valor las Sierras de Curicó como alternativas a un uso turístico convencional en el contexto de escasas o nulas posibilidades de regular medidas efectivas de protección del patrimonio local. Por último, se recomienda un plan de manejo y la no apertura del sitio al público.

  16. PLANTAS MEDICINALES USADAS POR LOS COGUI EN EL RÍO PALOMINO, SIERRA NEVADA DE SANTA MARTA (COLOMBIA

    Directory of Open Access Journals (Sweden)

    EDUINO CARBONÓ-DELAHOZ

    2013-12-01

    Full Text Available Con el propósito de registrar conocimientos tradicionales sobre plantas medicinales entre los Cogui o Kággaba en la cuenca del río Palomino, Sierra Nevada de Santa Marta (Colombia, se evaluó el uso de la flora con la aplicación de una técnica etnobotánica cuantitativa. Mediante entrevistas a mamos o sacerdotes-jefes, durante recorridos en áreas silvestres, cultivadas y huertos caseros en diferentes zonas climáticas de la cuenca, se obtuvo información de 189 especies utilizadas, incluidas en 162 géneros y 77 familias, así como el modo de uso y la forma de preparación para el tratamiento de enfermedades comunes. Las familias Asteraceae y Leguminosae registraron el mayor número de especies útiles. La evaluación con el índice de importancia relativa (IR permitió establecer que Ladenbergia moritziana (Rubiaceae, Stevia lucida (Asteraceae, Aniba sp. (Lauraceae, Erechtites hieracifolia (Asteraceae y Carex sp. (Cyperaceae son las especies con mayores valores de importancia. El 89 % de las plantas utilizadas es obtenido de espacios silvestres, lo que sugiere un conocimiento amplio de la diversidad vegetal local y el ejercicio de una práctica etnomédica.

  17. The geodynamic evolution of the eastern Sierras Pampeanas based on geochemical, Sm-Nd, Pb-Pb and SHRIMP data

    DEFF Research Database (Denmark)

    Drobe, M; Lopez de Luchi, M; Steenken, A

    2011-01-01

    , have been carried out to unravel the provenance and the geodynamic history of the Eastern Sierras Pampeanas, Central Argentina. The geochemical and the Sm–Nd data point to a slightly stronger mafic and less-fractionated material in the provenance area of the Sierras de Co´rdoba when compared...

  18. 77 FR 23476 - Energia Sierra Juarez U.S., LLC; Supplemental Notice That Initial Market-Based Rate Filing...

    Science.gov (United States)

    2012-04-19

    ... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. ER12-1470-000] Energia Sierra Juarez U.S., LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes Request for... Energia Sierra Juarez U.S., LLC's application for market-based rate authority, with an accompanying rate...

  19. 75 FR 26786 - Notice of Public Meeting: Sierra Front-Northwestern Great Basin Resource Advisory Council, NV

    Science.gov (United States)

    2010-05-12

    ... 261A; 10-08807; MO 4500012081; TAS: 14X1109] Notice of Public Meeting: Sierra Front-Northwestern Great..., Bureau of Land Management (BLM) Sierra Front-Northwestern Great Basin Resource Advisory Council (RAC... discussion will include, but are not limited to: District Manager's reports on current program of work, Draft...

  20. Airborne Pesticides as an Unlikely Cause for Population Declines of Alpine Frogs in the Sierra Nevada, California

    Science.gov (United States)

    Airborne pesticides from the Central Valley of California have been implicated as a cause for population declines of several amphibian species, with the strongest evidence for the mountain yellow-legged frog complex (Rana muscosa and R. sierrae) in the Sierra Nevada. We measured...

  1. Efeitos da climatização do curral de espera na produção de leite de vacas holandesas Effects of the climatization of the corral of wait on milk production of holstein cows

    Directory of Open Access Journals (Sweden)

    Iran J.O. da Silva

    2002-09-01

    Full Text Available O presente estudo foi conduzido com o objetivo de avaliar os efeitos da climatização de ambientes em condições de pré-ordenha na produção de leite. O experimento foi realizado na fazenda experimental do Instituto de Zootecnia, em Nova Odessa, SP, durante doze dias consecutivos do verão de 1999. Foram analisados os efeitos do sistema de resfriamento evaporativo (SRE, por nebulização, no curral de espera. Utilizaram-se doze animais da raça holandesa, divididos em dois grupos de seis animais, onde apenas o segundo grupo foi submetido ao sistema de climatização. Os dados ambientais foram registrados no horário das ordenhas, ou seja, às 7 e 15 h. Para avaliação dos dados ambientais utilizaram-se os índices de conforto térmico: índice de temperatura de globo (WBGT, índice de temperatura e umidade (THI e índice de carga térmica radiante (CTR. As respostas fisiológicas, como freqüência cardíaca e respiratória, temperatura retal e produção de leite também foram consideradas variáveis de resposta. Conclui-se que o efeito do resfriamento do ambiente é mais significativo no horário da segunda ordenha (15 h, quando comparado ao da primeira (7 h, melhorando as condições de conforto térmico no curral de espera, refletindo em um aumento de 7,28% na produção de leite, além de promover redução na frequência respiratória e cardíaca.This work was carried out to evaluate the effect of the climatization of environments in daily pay-milking conditions. The experiment was carried out in the experimental farm of the Institute of Zootecnia, in Nova Odessa, SP, during twelve consecutive days of the summer. The effects of the system of evaporative cooling (SRE, by fogging in the wait corral and milking room were analyzed. Twelve Holstein cows were divided in two groups, where only the second group had passed climatization. Data environment were recorded at 7:00 am and 3:00 pm. For evaluation of the ambient data, index of thermal

  2. Análisis de las economías familiares en el bienestar de las etnias zapotecas y chatinas de la Sierra Sur de Oaxaca en 2013

    Directory of Open Access Journals (Sweden)

    Fidel Méndez Bautista

    2016-01-01

    Full Text Available El presente artículo aborda el análisis del bienestar de 121 hogares zapotecos y chatinos de la Sierra Sur en el estado de Oaxaca; específicamente se evalúa la economía familiar y se prueba un modelo teórico de bienestar que consta de 27 variables independientes, como: ingresos, dieta, vulnerabilidad, características sociodemográficas, activos y calidad de la vivienda. La información procede de entrevistas estructuradas financiadas por la CDI y realizadas a los jefes de familia entre septiembre y octubre de 2013. La variable dependiente “bienestar de los hogares indígenas” (BHI se construyó mediante la técnica multivariante análisis factorial a partir de los siguientes rubros de gasto: alimentación, salud, educación, ropa, trasporte y energía eléctrica. La variable BHI se estratificó a través del método de estratificación óptima de Dalenius y Hodges (1959. Enseguida se construyó el modelo del bienestar que establece relaciones definidas entre BHI y las variables dependientes significativas mediante análisis de regresión múltiple. Así, fue posible identificar aquellas variables que favorecen o restringen el bienestar a través de dos ecuaciones lineales.

  3. Dataset of Passerine bird communities in a Mediterranean high mountain (Sierra Nevada, Spain)

    Science.gov (United States)

    Pérez-Luque, Antonio Jesús; Barea-Azcón, José Miguel; Álvarez-Ruiz, Lola; Bonet-García, Francisco Javier; Zamora, Regino

    2016-01-01

    Abstract In this data paper, a dataset of passerine bird communities is described in Sierra Nevada, a Mediterranean high mountain located in southern Spain. The dataset includes occurrence data from bird surveys conducted in four representative ecosystem types of Sierra Nevada from 2008 to 2015. For each visit, bird species numbers as well as distance to the transect line were recorded. A total of 27847 occurrence records were compiled with accompanying measurements on distance to the transect and animal counts. All records are of species in the order Passeriformes. Records of 16 different families and 44 genera were collected. Some of the taxa in the dataset are included in the European Red List. This dataset belongs to the Sierra Nevada Global-Change Observatory (OBSNEV), a long-term research project designed to compile socio-ecological information on the major ecosystem types in order to identify the impacts of global change in this area. PMID:26865820

  4. Dataset of Passerine bird communities in a Mediterranean high mountain (Sierra Nevada, Spain).

    Science.gov (United States)

    Pérez-Luque, Antonio Jesús; Barea-Azcón, José Miguel; Álvarez-Ruiz, Lola; Bonet-García, Francisco Javier; Zamora, Regino

    2016-01-01

    In this data paper, a dataset of passerine bird communities is described in Sierra Nevada, a Mediterranean high mountain located in southern Spain. The dataset includes occurrence data from bird surveys conducted in four representative ecosystem types of Sierra Nevada from 2008 to 2015. For each visit, bird species numbers as well as distance to the transect line were recorded. A total of 27847 occurrence records were compiled with accompanying measurements on distance to the transect and animal counts. All records are of species in the order Passeriformes. Records of 16 different families and 44 genera were collected. Some of the taxa in the dataset are included in the European Red List. This dataset belongs to the Sierra Nevada Global-Change Observatory (OBSNEV), a long-term research project designed to compile socio-ecological information on the major ecosystem types in order to identify the impacts of global change in this area.

  5. Tectonic, volcanic, and climatic geomorphology study of the Sierras Pampeanas Andes, northwestern Argentina

    Science.gov (United States)

    Bloom, A. L.; Strecker, M. R.; Fielding, E. J.

    1984-01-01

    A proposed analysis of Shuttle Imaging Radar-B (SIR-B) data extends current research in the Sierras Pampeanas and the Puna of northwestern Argentina to the determination - by the digital analysis of mountain-front sinuousity - of the relative age and amount of fault movement along mountain fronts of the late-Cenozoic Sierras Pampeanas basement blocks; the determination of the age and history of the boundary across the Andes at about 27 S latitude between continuing volcanism to the north and inactive volcanism to the south; and the determination of the age and extent of Pleistocene glaciation in the High Sierras, as well as the comparative importance of climatic change and tectonic movements in shaping the landscape. The integration of these studies into other ongoing geology projects contributes to the understanding of landform development in this active tectonic environment and helps distinguish between climatic and tectonic effects on landforms.

  6. Magmatism and mineralization ages from northeast area of La Sierra de San Luis, Argentina

    International Nuclear Information System (INIS)

    Ulacco, Jose H

    2001-01-01

    Three igneous rock groups, characterized as pre, sin and post-kinematics, have intruded the crystalline basement of Sierra de San Luis, Argentina. The ore deposits are associated with Devonian to Carboniferous epizonal granite stocks and batholiths in an area underlain by metamorphic rocks. This granitoids are characterized as post-kinematics magmatism. Model lead ages on the ore deposits (338,8 - 292,1 Ma) are strongly supported by K-Ar ages of the intrusives. The bulk of the north Sierra de San Luis ore deposits are genetically related to late Carboniferous granite plutons. The ore bodies are tungsten veins with greisen envelopes, lead veins, epithermal fluorite veins and REE and Th deposit. A generalized scheme of ore bodies related to granites is proposed. The ore deposits and their lithotectonic setting are characteristic of Gondwana metallogenetic Epoch in the Sierra de San Luis (au)

  7. Copper localization, elemental content, and thallus colour in the copper hyperaccumulator lichen Lecanora sierra from California

    Science.gov (United States)

    Purvis, O.W.; Bennett, J.P.; Spratt, J.

    2011-01-01

    An unusual dark blue-green lichen, Lecanora sierrae, was discovered over 30 years ago by Czehura near copper mines in the Lights Creek District, Plumas County, Northern California. Using atomic absorption spectroscopy, Czehura found that dark green lichen samples from Warren Canyon contained 4% Cu in ash and suggested that its colour was due to copper accumulation in the cortex. The present study addressed the hypothesis that the green colour in similar material we sampled from Warren Canyon in 2008, is caused by copper localization in the thallus. Optical microscopy and electron microprobe analysis of specimens of L. sierrae confirmed that copper localization took place in the cortex. Elemental analyses of L. sierrae and three other species from the same localities showed high enrichments of copper and selenium, suggesting that copper selenates or selenites might occur in these lichens and be responsible for the unusual colour.

  8. Copper localization, elemental content, and thallus colour in the copper hyperaccumulator lichen Lecanora sierrae from California

    Science.gov (United States)

    Purvis, O.W.; Bennett, J.P.; Spratt, J.

    2011-01-01

    An unusual dark blue-green lichen, Lecanora sierrae, was discovered over 30 years ago by Czehura near copper mines in the Lights Creek District, Plumas County, Northern California. Using atomic absorption spectroscopy, Czehura found that dark green lichen samples from Warren Canyon contained 4% Cu in ash and suggested that its colour was due to copper accumulation in the cortex. The present study addressed the hypothesis that the green colour in similar material we sampled from Warren Canyon in 2008, is caused by copper localization in the thallus. Optical microscopy and electron microprobe analysis of specimens of L. sierrae confirmed that copper localization took place in the cortex. Elemental analyses of L. sierrae and three other species from the same localities showed high enrichments of copper and selenium, suggesting that copper selenates or selenites might occur in these lichens and be responsible for the unusual colour. Copyright ?? 2011 British Lichen Society.

  9. Banco de semillas en ambientes de las sierras de Azul (Buenos Aires, Argentina con distinta intensidad de disturbios Seed bank in environments of the Azul sierras (Buenos Aires, Argentina with different disturbance intensities

    Directory of Open Access Journals (Sweden)

    F. Gianaccini

    2009-12-01

    Full Text Available A fin de evaluar el impacto de la agricultura sobre la flora potencial de pastizales serranos en el Partido de Azul (Buenos Aires, Argentina, se comparó el banco de semillas en los 20 cm superficiales del suelo entre dos sectores adyacentes en las primeras estribaciones serranas. Uno de ellos está sometido a agricultura permanente y el otro conserva un pastizal natural bajo pastoreo y quemas no programados. Este último sector presentó en promedio una densidad de 70.000 sem m-2 contra 36.720 sem m-2 en el primero. La representación de semillas de especies nativas se redujo notablemente en el ambiente agrícola. Stipa caudata con 31360 sem m-2 resultó la especie más abundante en el pastizal. En el ambiente de cultivo, su densidad se redujo a 9940 sem m-2 y fue superada por Chenopodium album con 10560 sem m-2. La similitud en la composición del banco fue de 55% en términos cualitativos y 27% en términos cuantitativos. Estos resultados evidencian que, en el área de estudio, el reemplazo del pastizal natural por agricultura reduce notoriamente las reservas de semillas y modifica la composición cualitativa y cuantitativa del banco con una elevada pérdida en la proporción de especies nativas.In order to evaluate the impact of agriculture on the potential flora of grasslands of the sierras of Azul (Buenos Aires Province, Argentina, the soil seed bank in the top 20 cm from two adjacent areas on the first foothill spurs were compared. One is submitted to continuous agriculture. The other area has grasslands under grazing and non programmed burning. The latter showed a mean density of 70.000 seeds m-2 against a mean density of 36.720 seeds m-2 in the first area. The proportional representation of native species seeds decreased strongly in the agricultural environment. The most abundant species in the grasslands was Stipa caudata (31.360 seeds m-2. In the agricultural environment, its density decreased to 9940 seeds m-2. It was surpassed by

  10. Validación de un instrumento para vigilar la inseguridad alimentaria en la Sierra de Manantlán, Jalisco Validation of an instrument to monitor food insecurity in Sierra de Manantlán, Jalisco

    Directory of Open Access Journals (Sweden)

    Hugo Melgar-Quiñonez

    2005-12-01

    Full Text Available OBJETIVO: Validar una versión de la Escala de Seguridad Alimentaria (FSS en comunidades de la Sierra de Manatlán, Jalisco. MATERIAL Y MÉTODOS: Usando grupos focales se modificó la FSS. Posteriormente se aplicó una encuesta a mujeres con niños preescolares. La FSS se validó correlacionándola con el inventario de alimentos del hogar y con la variedad de dieta de la entrevistada. La encuesta incluyó un cuestionario socio-económico. RESULTADOS: El 44% de los hogares indicaron inseguridad alimentaria leve, 33% hambre moderada y 19.7% hambre severa. La inseguridad alimentaria estuvo inversamente correlacionada con el inventario de alimentos (r=-0.36**, alimentos de origen animal (r=-0.28**, lácteos (r=-0.25**, alimentos procesados (r=-0.37**, frutas (r=-0.21* y verduras (r=-0.28**; *pOBJECTIVE: To validate a version of the Food Security Scale (FSS in communities located in Sierra de Manantlán, Jalisco. MATERIAL AND METHODS: Using focus groups, the FSS was modified to fit the Mexican context. Subsequently, a survey was applied to women with pre-school aged children. The FSS was validated in correlation with a household food inventory and the dietary variety of the individual being interviewed. The interview also included a socioeconomic questionnaire. RESULTS: Forty-four percent of the households reported mild food insecurity, 33% reported moderate hunger and 19.7% reported severe hunger. Food insecurity was significantly and inversely correlated with the number of food items in the household (r=-0.36**, animal source foods (r=-0.28**, dairy products (r=-0.25*, processed foods (r=-0.37**, fruits (r=-0.21*, and vegetables (r=-0.28**; *p<0.05, **p< 0.01. Food insecurity was also associated with low dietary variety (r=-0.23, p=0.02. These associations were maintained in multivariate models. CONCLUSIONS: The FSS is a useful tool for monitoring food insecurity in rural regions of Jalisco.

  11. Late Miocene ignimbrites at the southern Puna-northern Sierras Pampeanas border (˜27°S): Stratigraphic correlation

    Science.gov (United States)

    Montero-López, Carolina; Guzmán, Silvina; Barrios, Fabiola

    2015-10-01

    New field observations and petrographic and geochemical data of pyroclastic deposits exposed along the Las Papas valley (border between southern Puna and northern Sierras Pampeanas, Argentina) and further north, lead us to propose a new stratigraphic correlation and classification of the late Miocene volcanism in this area. We redefine the Las Papas, Las Juntas, Aguada Alumbrera and Rosada ignimbrites and define the Agua Caliente and Del Medio ignimbrites. The whole set of ignimbrites are rhyolites and less frequently dacites of calc-alkaline affinity. In the present contribution we divide ignimbrites into the Agua Negra and Rincón groups, based mainly on their geochemical signature. The Agua Negra Group is formed by the Las Papas and Las Juntas ignimbrites, indurated and welded, lithic-rich, with crystal-poor pumices and crystal-rich matrix. The Rincón Group comprises the Agua Caliente, Aguada Alumbrera, Rosada and Del Medio ignimbrites, with variable welding degrees, lithic and crystal content. The greater enrichment of crystals in the matrix in comparison with the crystal content in pumices indicates significant elutriation during flow transport and thus volume estimations are to be considered lower bounds for the actual erupted volume. The total minimum estimated volume for the ignimbrites of the Agua Negra and Rincón groups is 2.8 km3 (2.3 km3 DRE). Field relationships and new analytical data indicate that the different acid ignimbrites that crop out in this small area are related to at least two different magma chambers. The widespread Quaternary volcanism in this area covers the older deposits, thus making it difficult to recognize the volcanic centers that produced these late Miocene ignimbrites.

  12. Granitoides paleozoicos de la Sierra de Narváez, Sistema de Famatina, Argentina: Hibridización de magmas en un margen continental activo

    Directory of Open Access Journals (Sweden)

    Cisterna, C. E.

    1992-12-01

    Full Text Available The granitoids from the Sierra de Narváez were investigated for their geochemical and petrographical characteristics. They are composed of calc-alkaline granites, granodiorites and tonalites, similar to the other paleozoic granitoids of the Famatina System. These rocks are intrusive in the Las Planchadas (volcanic rocks and Suri (sedimentary rocks Formations, which are probably cogenetic with the granitoids within the same magmatic cycle.The study of the granitoids reveals the close relationship between their composition and the abundance of the enclosed magmatic inclusions. The latter represent rocks and granodioritic tonalitic and diorite composition, and have a great number of mineralogical characteristic that suggest the presence of two magmas, mafic and felsic for the origin of such enclaves.The close chemical relationship existing between the inclusions and their host rocks shows that the mafic and felsic components are compositionally modified and that the granitoids are more or less hybridized.Trace elements discrimination diagrams have been used as a tools for fingerprinting the tectonic setting of the Sierra de Narváez granitoids. The geochemistry as well as the geologic relations of the granitoids with the roughly coeval ordovician vulcanism indicate a volcanic arc environment.Las rocas que afloran en el extremo septentrional de la Sierra de Narváez están representadas por una asociación de monzogranitos, granodioritas y tonalitas que definen una serie calcoalcalina, de características similares a las de otros intrusivos del Paleozoico del Sistema de Famatina. Estos granitoides se hallan intruyendo las Formaciones Las Planchadas y Suri, representadas por vulcanitas y metasedimentitas, respectivamente, y corresponderían a un mismo evento magmático del Paleozoico Inferior.Los granitoides estudiados presentan abundantes inclusiones ígneas de composición granodiorítica o tonalítica y diorítica. La estrecha relación que

  13. La Sierra de Piura: ¿al margen de la evolución agraria andina?

    Directory of Open Access Journals (Sweden)

    1991-01-01

    Full Text Available LES ANDES DE PIURA : EN MARGE DE L’EVOLUTION AGRICOLE ANDINE ? La diversité productive des Andes centrales de Piura, au Nord du Pérou, obéit à trois principales modalités de reproduction de la fertilité, qui s’appuient sur les trois éléments suivants : 1- l’arbre et la défriche-brûlis, 2- l’animal et la culture attelée légère (araire, et 3- l’eau et l’irrigation. Il s’avère intéressant d’essayer de dater l’apparition de ces différentes formes d’agriculture qui coexistent dans les Andes de Piura. Cette micro-région constitue un espace marginal, car ni la révolution agro-hydraulique andine, ni la révolution fourragère du XIXème siècle, ni la révolution verte récente ne s’y sont généralisées. Malgré son enclavement et son retard par rapport à l’accumulation spectaculaire des forces productives dans les vallées de la côte, la micro-région possède une dynamique du développement agricole propre, qui combine des techniques d’arborisation, d’irrigation et d’articulation entre l’agriculture et l’élevage avec des relations sociales originales (rondes paysannes. La diversidad productiva de la sierra de Piura, al Norte del Perú, obedece a tres modalidades principales de reproducción de la fertilidad, basadas en: 1- el árbol y la roza y quema, 2- el animal y la agricultura de yunta ligera (arado de palo, y 3- el agua y la irrigación. Resulta fecundo para aproximarse a la evolución agrícola andina, intentar poner fechas a la aparición de estas diferentes formas de agricultura que coexisten en la sierra central de Piura. Ésta constituye un espacio marginal, pues ni la revolución agrohidraúlica andina, ni la revolución forrajera del siglo XIX, ni la revolución verde reciente se han generalizado. Pese a su marginación y su atraso con relación a la espectacular acumulación de las fuerzas productivas en los valles de la costa, la micro región posee una dinámica del desarrollo agrario propia, que

  14. Modelo de simulación para determinar niveles de contaminación del Río Mantaro

    Directory of Open Access Journals (Sweden)

    Iván Castillo Ponce

    2011-06-01

    Full Text Available Objetivos: Determinar si la contaminación del río Mantaro tiene alguna influencia sobre la viabilidad del programa “Sierra Exportadora”; luego de la construcción del modelo, se conducirá experimentos sobre el modelo con el fin de reducir la incertidumbre acerca de la influencia de la contaminación del río Mantaro sobre la viabilidad del programa “Sierra Exportadora” y evaluar los posibles resultados. Métodos: Construir un modelo de simulación donde se utilizará este sistema, el cual será útil para extrapolar los resultados posibles, dicha solución obtenida enmarcará los hitos más importantes que intervienen en el proceso; éstos elementos básicos del proceso están unidos entre sí, mediante flechas que indican las influencias que se establecen entre ellos; además el diagrama da a conocer que el proceso posee una estructura con un bucle de realimentación negativa, la influencia constituye una descripción del proceso que se está estudiando. Después de haber realizado una simulación 50 veces del modelo con los distintos valores de entrada tales como la contaminación, la influencia de la población, la viabilidad de la oca y alcachofa, estos datos se almacenaron en las tablas generadas por el programa STELLA y luego estos datos fueron exportados a Excel para su análisis. Resultados: La construcción de este modelo de simulación reduce únicamente la incertidumbre provocada por uno de varios factores, la contaminación del río Mantaro sobre la viabilidad del Programa Sierra Exportadora. Conclusiones: La información generada por la investigación puede ser aplicada en otros sistemas que tengan características similares. Lo que propone precisamente es aportar e integrar todos los aspectos en un modelo general de simulación para el análisis de la viabilidad del Programa Sierra Exportadora.

  15. Vulnerability of birds to climate change in California's Sierra Nevada

    Directory of Open Access Journals (Sweden)

    Rodney B. Siegel

    2014-06-01

    Full Text Available In a rapidly changing climate, effective bird conservation requires not only reliable information about the current vulnerability of species of conservation concern, but also credible projections of their future vulnerability. Such projections may enable managers to preempt or reduce emerging climate-related threats through appropriate habitat management. We used NatureServe's Climate Change Vulnerability Index (CCVI to predict vulnerability to climate change of 168 bird species that breed in the Sierra Nevada mountains of California, USA. The CCVI assesses species-specific exposure and sensitivity to climate change within a defined geographic area, through the integration of (a species' range maps, (b information about species' natural history traits and ecological relationships, (c historic and current climate data, and (d spatially explicit climate change projections. We conducted the assessment under two different downscaled climate models with divergent projections about future precipitation through the middle of the 21st century. Assessments differed relatively little under the two climate models. Of five CCVI vulnerability ranking categories, only one species, White-tailed Ptarmigan (Lagopus leucura, received the most vulnerable rank, Extremely Vulnerable. No species received the second-highest vulnerability ranking, Highly Vulnerable. Sixteen species scored as Moderately Vulnerable using one or both climate models: Common Merganser (Mergus merganser, Osprey (Pandion haliaetus, Bald Eagle (Haliaeetus leucocephalus, Northern Goshawk (Accipiter gentilis, Peregrine Falcon (Falco peregrinus, Prairie Falcon (Falco mexicanus, Spotted Sandpiper (Actitis macularius, Great Gray Owl (Strix nebulosa, Black Swift (Cypseloides niger, Clark's Nutcracker (Nucifraga columbiana, American Dipper (Cinclus mexicanus, Swainson's Thrush (Catharus ustulatus, American Pipit (Anthus rubescens, Gray-crowned Rosy-Finch (Leucosticte tephrocotis, Pine Grosbeak

  16. Semiarid ethnoagroforestry management: Tajos in the Sierra Gorda, Guanajuato, Mexico.

    Science.gov (United States)

    Hoogesteger van Dijk, Vincent M; Casas, Alejandro; Moreno-Calles, Ana Isabel

    2017-06-12

    The semi-arid environments harbor nearly 40% of biodiversity, and half of indigenous cultures of Mexico. Thousands of communities settled in these areas depend on agriculture and using wild biodiversity for their subsistence. Water, soil, and biodiversity management strategies are therefore crucial for people's life. The tajos, from Sierra Gorda, are important, poorly studied, biocultural systems established in narrow, arid alluvial valleys. The systems are constructed with stone-walls for capturing sediments, gradually creating fertile soils in terraces suitable for agriculture in places where it would not be possible. We analyzed biocultural, ecological, economic and technological relevance of the artificial oasis-like tajos, hypothesizing their high capacity for maintaining agricultural and wild biodiversity while providing resources to people. We conducted our research in three sections of the Mezquital-Xichú River, in three communities of Guanajuato, Mexico. Agroforestry management practices were documented through semi-structured and in-depth qualitative interviews. Vegetation composition of local forests and that maintained in tajos was sampled and compared. Tajos harbor high agrobiodiversity, including native varieties of maize and beans, seven secondary crops, 47 native and 25 introduced perennial plant species. Perennial plants cover on average 26.8% of the total surface of plots. Tajos provide nearly 70% of the products required by households' subsistence and are part of their cultural identity. Tajos are heritage of TEK and land management forms of pre-Columbian Mexican and Mediterranean agricultural techniques, adapting and integrating modern agricultural practices. Tajos are valuable biocultural systems adapted to local semiarid conditions and sources of technology for similar areas of the World.

  17. Formas de tierra y clases de pendiente del departamento de Cusco: informe ejecutivo

    OpenAIRE

    Instituto Nacional de Recursos Naturales. Dirección General de Estudios y Proyectos

    2000-01-01

    Muestra la evaluación de las formas de tierra y clases de pendiente de la región sierra del departamento de Cusco. El objetivo principal es presentar de manera esquemática el conjunto de formas de tierra, clases de pendiente dominante, sus diferencias morfoclimáticas y evolutivas, así como la identificación de las principales acciones erosivas que actualmente puedan significar riesgos a las actividades humanas, o a coadyuvar al deterioro generalizado del medio. El documento ha sido elaborado ...

  18. Formas de tierra y clases de pendiente del departamento de Amazonas: informe ejecutivo

    OpenAIRE

    Instituto Nacional de Recursos Naturales. Dirección General de Estudios y Proyectos

    2000-01-01

    Muestra la evaluación de las formas de tierra y clases de pendiente de la región sierra del departamento de Amazonas. El objetivo principal es presentar de manera esquemática el conjunto de formas de tierra, clases de pendiente dominante, sus diferencias morfoclimáticas y evolutivas, así como la identificación de las principales acciones erosivas que actualmente puedan significar riesgos a las actividades humanas, o a coadyuvar al deterioro generalizado del medio. El documento ha sido elabora...

  19. Formas de tierra y clases de pendiente del departamento de Ica: informe ejecutivo

    OpenAIRE

    Instituto Nacional de Recursos Naturales. Dirección General de Estudios y Proyectos

    2000-01-01

    Abarca la evaluación de las formas de tierra y clases de pendiente de la región sierra del departamento de Ica. El objetivo principal es brindar de manera esquemática el conjunto de formas de tierra, clases de pendiente dominante, sus diferencias morfoclimáticas y evolutivas, así como la identificación de las principales acciones erosivas que actualmente puedan significar riesgos a las actividades humanas, o a coadyuvar al deterioro generalizado del medio. El documento ha sido elaborado en el...

  20. Formas de tierra y clases de pendiente del departamento de Arequipa: informe ejecutivo

    OpenAIRE

    Instituto Nacional de Recursos Naturales. Dirección General de Estudios y Proyectos

    1999-01-01

    Abarca la evaluación de las formas de tierra y clases de pendiente de la región sierra del departamento de Arequipa. El objetivo principal es mostrar de manera esquemática el conjunto de formas de tierra, clases de pendiente dominante, sus diferencias morfoclimáticas y evolutivas, así como la identificación de las principales acciones erosivas que actualmente puedan significar riesgos a las actividades humanas, o a coadyuvar al deterioro generalizado del medio. El documento ha sido elaborado ...

  1. Gravity data from the Sierra Vista Subwatershed, Upper San Pedro Basin, Arizona

    Science.gov (United States)

    Kennedy, Jeffrey R.

    2015-01-01

    Observations of very small changes of Earth’s gravitational field (time-lapse gravity) provide a direct, non-invasive method for measuring changes in aquifer storage change. An existing network of gravity stations in the Sierra Vista Subwatershed was revised in 2014 to better understand the spatial distribution of changes in aquifer storage, especially with relation to ephemeral channel recharge and a groundwater cone of depression associated with pumping in the greater Sierra Vista area. In addition, the network was extended to provide baseline data for possible future enhanced-recharge projects.

  2. SIERRA Code Coupling Module: Arpeggio User Manual Version 4.44

    Energy Technology Data Exchange (ETDEWEB)

    Sierra Thermal/Fluid Team

    2017-04-01

    The SNL Sierra Mechanics code suite is designed to enable simulation of complex multiphysics scenarios. The code suite is composed of several specialized applications which can operate either in standalone mode or coupled with each other. Arpeggio is a supported utility that enables loose coupling of the various Sierra Mechanics applications by providing access to Framework services that facilitate the coupling. More importantly Arpeggio orchestrates the execution of applications that participate in the coupling. This document describes the various components of Arpeggio and their operability. The intent of the document is to provide a fast path for analysts interested in coupled applications via simple examples of its usage.

  3. Late holocene tectonic damming up in eastern Sierras Pampeanas, Cordoba, Argentina

    International Nuclear Information System (INIS)

    Massabie, A.C.; Limarino, C.O; Panarello, H.O.; Cordero, R.R; Bertels, A

    2001-01-01

    Neogene deformation due to Andean Orogeny has caused block faulting in the Sierras Pampeanas area, fracturing a Precambrian Paleozoic crystalline basement. These dislocations produced Late Tertiary to Quaternary landscape changes which are mainly expressed in clear and good preserved fluvial path modifications in sedimentary cover. The study of alterations of fluvial channel pattern associated with Quaternary tectonics has special neotectonic value in this central area of Argentina as a basic method to gain more precise temporal restrain of recent movements. Attention to this specific neotectonic field parallels general geologic knowledge evolution in Sierras Pampeanas. But in spite that nowadays better stratigraphic controls are available based on morphostructural, sedimentologic and paleontologic constraints (Massabie, 1999), still remain temporal uncertainties. Major difficulties for a more precise dating of neotectonic in the area of Sierras Pampeanas is a direct consequence of the random distribution of Neogene continental sediments located in different isolated basins which are mainly lacking of good bioestratigraphic control for comprehensive correlation. First steps in the study of Quaternary faulting dating in Sierras Pampeanas starts with the pioneer paper of Schlagintweit (1954) which reported a Quaternary faulting backed by stratigraphic and morphostructural considerations. Afterthen other papers about Quaternary faulting were presented based on similar geologic constraints (Lencinas y Timonieri, 1968; Massabie, 1976, 1987; Massabie and Szlafsztein, 1991; Kraemer et al., 1993; Massabie et al.,1998). In the way up to manage better adjust of Quaternary faulting dating in Sierras Pampeanas, there is a first work for Eastern Sierras Pampeanas presenting 14 C dating (Costa and Vita-Finzi, 1996). The authors postulated a late step of faulting younger than 1,300 for Comechingones fault with radiocarbon analysis based on organic matter in footwall colluvium

  4. Soil fauna in forest and coffee plantations from the Sierra Nevada de Santa Mar ta, Colombia

    International Nuclear Information System (INIS)

    Camero R, Edgar

    2002-01-01

    Two research stations (M inca, 700 m altitude and Maria Ter esa, 790 m altitude) were established in the Sierra Nevada de Santa Mar ta in places to study the soil fauna associated with forest and coffee plantations. Soil fauna was collected using pitfall and Bailer's traps. Samples were taken from litter as well as from horizons 0, A and B. individuals collected were identified to family level. Diversity, abundance and frequency indexes were used to compare fauna composition at both sites. Significant differences were found between the two research sites as well as with data from other high altitude forest in the Sierra Nevada de Santa Mar ta

  5. Evaluación espacial y temporal de la vegetación de la Sierra Madrigal, Tabasco, México (1973-2003

    Directory of Open Access Journals (Sweden)

    Erika del Carmen Salazar Conde

    2012-02-01

    Full Text Available Esta investigación tuvo como objetivo evaluar los cambios espaciales de la vegetación en la Sierra Madrigal; estado de Tabasco, en un área de 3 642 ha, en el período 1973-2003. Con base en la fotointerpretación de fotografías aéreas y verificación de campo, se elaboró la cartografía de vegetación y usos del suelo de los años 1973, 1984 y 2003 a escala 1:20 000. Se caracterizó la vegetación y los usos del suelo, se obtuvieron los índices de cambio de uso del suelo, y se compararon algunas propiedades del suelo con base en los tipos de la vegetación. La selva alta perennifolia de ramón (Brosimum alicastrum y huapaque (Dialium guianense tuvo una pérdida del 80% de su superficie en 30 años; las principales causas de esta pérdida fueron los incendios forestales que condujeron a la formación de vegetación secundaria (56% y la ampliación de los pastizales (10% para la ganadería de bovinos. La eliminación de la selva provocó, asimismo, disminución de los contenidos de materia orgánica y nitrógeno, lo que indica degradación de suelos en la capa de 0 a 30 cm de profundidad.

  6. Afrontando el cambio climático y los riesgos contra la salud: respuestas en la Sierra Tarahumara

    Directory of Open Access Journals (Sweden)

    Teresa Elizabeth Cueva

    2011-01-01

    Full Text Available La literatura relacionada con el impacto del cambio climático empieza a dar cuenta de los diversos vgrados de vulnerabilidad de la población y de la capacidad de respuesta y de adaptación de distintos sectores sociales en el mundo. Sin embargo aún son pocos los estudios que, al analizar las respuestas alos riesgos para la salud derivados del cambio climático, señalen las limitaciones y oportunidades quedan forma a procesos de adaptación orientados a enfrentar los retos de salud. En este estudio se intenta avanzar por esa línea enfocándose en un sector pobre de la población indígena campesina mexicana. El artículo se basa en una investigación de hogares que se llevó a cabo de diciembre de 2006 a abril de 2007 en tres comunidades de la Sierra Tarahumara, ubicada al suroeste de Chihuahua. Los resultados revelan que incluso en un contexto de extrema pobreza y vulnerabilidad al cambio climático, la población desarrolla respuestas para afrontarlo y adaptarse. Así, los hogares tarahumaras han desarrollado tres tiPos de estrategias: a las basadas en sus usos y costumbres, b la utilización del sistema de salud que ofrecen las instituciones públicas y las organizaciones no gubernamentales, y c las prácticas sociales orientadas al exterior y la emigración a las zonas urbanas como canales de integración con la sociedad "occidental". También se advierte que varias políticas gubernamentales orientadas al desarrollo de las comunidades, con impacto en la salubridad de la población, presentan limitaciones por su falta de coordinación intersectorial; un caso peculiar en el cual se observa la generación de cierta sinergia es el del área de servicios de salud, donde se ha logrado retomar los usos y costumbres de la población valiéndose de representantes de las comunidades y de las ONG.

  7. Status and understanding of groundwater quality in the Tahoe-Martis, Central Sierra, and Southern Sierra study units, 2006-2007--California GAMA Priority Basin Project

    Science.gov (United States)

    Fram, Miranda S.; Belitz, Kenneth

    2012-01-01

    Groundwater quality in the Tahoe-Martis, Central Sierra, and Southern Sierra study units was investigated as part of the Priority Basin Project of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program. The three study units are located in the Sierra Nevada region of California in parts of Nevada, Placer, El Dorado, Madera, Tulare, and Kern Counties. The GAMA Priority Basin Project is being conducted by the California State Water Resources Control Board, in collaboration with the U.S. Geological Survey (USGS) and the Lawrence Livermore National Laboratory. The project was designed to provide statistically robust assessments of untreated groundwater quality within the primary aquifer systems used for drinking water. The primary aquifer systems (hereinafter, primary aquifers) for each study unit are defined by the depth of the screened or open intervals of the wells listed in the California Department of Public Health (CDPH) database of wells used for municipal and community drinking-water supply. The quality of groundwater in shallower or deeper water-bearing zones may differ from that in the primary aquifers; shallower groundwater may be more vulnerable to contamination from the surface. The assessments for the Tahoe-Martis, Central Sierra, and Southern Sierra study units were based on water-quality and ancillary data collected by the USGS from 132 wells in the three study units during 2006 and 2007 and water-quality data reported in the CDPH database. Two types of assessments were made: (1) status, assessment of the current quality of the groundwater resource, and (2) understanding, identification of the natural and human factors affecting groundwater quality. The assessments characterize untreated groundwater quality, not the quality of treated drinking water delivered to consumers by water purveyors. Relative-concentrations (sample concentrations divided by benchmark concentrations) were used for evaluating groundwater quality for those

  8. El mundo del libro: octubre de 1961

    Directory of Open Access Journals (Sweden)

    Agustín Rodríguez Garavito

    1961-10-01

    Full Text Available El documento presenta las reseñas de los siguientes títulos: Los orígenes del modernismo en Colombia -Por Rafael Maya. Biblioteca de Autores Contemporáneos. Niebla en la sierra -Por Manuel González Martínez AEDITA-Editores. Bogotá, D. E. Madrugada en la sangre. Meridiano de fuego y otros poemas. Por Emilio Rico - Imprenta Departamental de Ibagué. Mujeres de Colombia. Por Gloria Pachón Castro y Flor de Nhora. Catálogo general de la Biblioteca Luis Ángel Arango. Volumen I Comprende: 000 a 299 Ivo Andric -Premio Nobel de Literatura 1961. Papeletas bibliográficas para el estudio de la historia de Colombia -Por Maurio Germán Romero, Guillermo Hernández de Alba, Sergio Elías Ortíz.

  9. Calidad de Imagen del Telescopio UNAM212

    Science.gov (United States)

    Cobos, F. J.; Teiada de Vargas, C.

    1987-05-01

    El telescopio UNAM2l2, del Observatorio Astronómico Nacional, situado en la Sierra de San Pedro Mártir (Baja California, México), cumplira en un futuro muy cercano siete años de uso para fines de investigación astronómica. Aunque en este tiempo no se ha efectuado un estudio sistemático acerca de su comportamiento óptico y de los factores que influyen en la calidad de las imágenes, se han realizado pruebas diversas, estudios parciales y reuniones especificas, cuyos resultados no siempre se han difundido ampliamente y generalmente no se han presentado por escrito. Es por ello que hemos creido necesario intentar una recopilación de la información existente para poder con ella establecer un diagnóstjco que, aunque no sea definitivo, sirva de base para futuros trabajos tendientes a optimizar el comportamiento óptico del telescopio. Es evidente que un buen número de las conclusiones que se presentan son resultado del trabajo de muchas personas ó de esfuerzos colectivos. Asimismo, hemos tratado de localizar información bibliográfica que pueda ser de utilidad. Nuestro objetivo primordial ha consistido en centrarnos en la óptica del telescopio y su calidad, pero también se han considerado otros aspectos que puedan afectar las imágenes obtenidas tales como: celda del primario, `seeing' local y externo, flexiones posibles en la estructura mecánica del telescopio, etc.

  10. Palaeogene to Early Miocene sedimentary history of the Sierra Espuña (Malaguide complex, internal zone of the Betic cordilleras, SE Spain. Evidence for extra-Malaguide (Sardinian? provenance of oligocene conglomerates: Palaeogeographic implications

    Directory of Open Access Journals (Sweden)

    Geel, T.

    1996-12-01

    discussed. It is shown that this large figure is at variance with geological data and partly due to erroneous field observations.La Sierra Espuña está situada al margen norte de la Zona Interna en la parte oriental de las Cordilleras Béticas y forma parte del Complejo Maláguide no metamórfico. Análisis paleontológico y sedimentológico de sedimentos de edad Eoceno al Aquitaniense del lado noroeste del Espuña han producido información nueva y de inesperada importancia respecto a la reconstrucción de la historia de la misma Sierra Espuña y del Maláguide en general. Los depósitos considerados del Eoceno superior (Auversiall son de edad Oligoceno inferior (P20 y contienen materiales supermaduros procedentes de fuera del dominio Maláguide. Los conglomerados con cantos calizos de Sierra Espuña (cientos de metros de espesor son de edad Oligoceno medio (P21 y representan un complejo de «fan deltas» en retroceso en el margen de una plataforma calcárea situada al nordeste de Sierra Espuña. Análisis de cantos podrían indicar que esta plataforma haya sido formada por parte del bloque del Norte de Cerdeña dado el predominio de fragmentos procedentes de una plataforma interior de edad Jurásico superior (calizas y dolomías con Clypeina y Trocholinu. Al contrario de los puntos de vista anteriores (Paquet, 1966; Lonergan, 1993, los conglomerados no pueden ser considerados como productos de erosión de unidades maláguides imbricadas. Por lo cual, uno de los argumentos más importantes en favor de una imbricación y colocación de mantos de corrimiento temprano (Eoceno superior-Oligoceno en Espuña es inválido. Se discuten otros argumentos en favor de movimientos tempranos, entre otros la sedimentación supuestamente continua del Eoceno hasta el Langhiense al noroeste de Sierra Espuña. Nuestros datos han demostrado la existencia de una interrupción estratigráfica desde el Aquitaniense medio hasta el Burdigaliense medio. Se presenta un modelo nuevo para la

  11. Inestabilidad de laderas e infraestructura vial: análisis de susceptibilidad en la Sierra Nororiental de Puebla, México

    Directory of Open Access Journals (Sweden)

    José Alejandro Galindo Serrano

    2015-12-01

    Full Text Available En México y diversas partes del mundo los desastres asociados a la inestabilidad de laderas generan impactos negativos en el ámbito socio-económico y ambiental. Además de las pérdidas de vida, y el daño a la cubierta vegetal, las afectaciones a las viviendas y la infraestructura son frecuentes; en los últimos años, la destrucción y deterioro en la infraestructura vial ha sido de particular importancia. Entre las diferentes áreas del país que de manera recurrente suelen ser afectadas por inestabilidad de laderas, se encuentra la Sierra Norte del estado de Puebla. Pérdidas humanas y económicas directas e indirectas, resultado de la ocurrencia de procesos de remoción en masa (PRM desencadenados principalmente por lluvias intensas, en comunidades vulnerables expuestas de esta región, han tenido lugar desde hace algunas décadas. El impacto en la infraestructura ha cobrado gran relevancia, especialmente desde 1999, razón por la cual este estudio se centró en el análisis de la susceptibilidad a procesos de remoción de masa en las principales carreteras de la región de la Sierra Nororiental de Puebla. Dicho análisis involucró la elaboración de un inventario de PRM, así como de la cartografía temática empleada como insumo para la aplicación del análisis multicriterio y pesos de evidencia. Se obtuvieron dos mapas de susceptibilidad de la región de interés, y los resultados fueron analizados a través de un índice de recurrencia de PRM. Finalmente, se efectuó el análisis espacial de la susceptibilidad a PRM de varios tramos carreteros de la Sierra Nororiental, con base en el análisis de proximidad y de superposición. El inventario de PRM generado se integró por 166 procesos de remoción en masa y 40 zonas potencialmente inestables. Las áreas de muy alta susceptibilidad corresponden a zonas con un relieve muy accidentado, mientras que las regiones planas coinciden con zonas de muy baja susceptibilidad. La variación de

  12. Noteworthy records of two species of mammals in the Sierra Madre de Oaxaca, Mexico Registros notables de dos especies de mamíferos de la Sierra Madre de Oaxaca, México

    Directory of Open Access Journals (Sweden)

    Miguel Briones-Salas

    2006-12-01

    Full Text Available We conducted mammal surveys in the Sierra Madre de Oaxaca (Sierra Norte in Oaxaca, Mexico, and recorded the occurrence of two conspicuous mammal species: the spider monkey (Ateles geoffroyi vellerosus and the coyote (Canis latrans cagottis. Spider monkeys has not been previously recorded in the Sierra Madre de Oaxaca, and coyotes have not been previously observed in Mexico at elevations as high as the present one (3 200 mas1 in the Sierra Madre de Oaxaca.Se efectuaron colectas de mamíferos en la Sierra Madre de Oaxaca (Sierra Norte en Oaxaca, México, y se registró la notoria presencia de dos mamíferos: el mono araña (Ateles geoffroyi vellerosus y el coyote (Canis latrans cagottis. El mono araña no se había registrado previamente en la Sierra Madre de Oaxaca, en tanto que el coyote, no había sido registrado en México a tan gran altitud (3 200 m como la de la localidad de captura.

  13. The Eastern delta-fan deposits on the Granada Basin as tectonic indicators of the Sierra Nevada uplift (Betic Cordillera, South Spain)

    Science.gov (United States)

    Roldán, Francisco Javier; Azañon, Jose Miguel; Mateos, Rosa Maria

    2014-05-01

    Sierra Nevada uplift and with original NE-SW normal left-lateral fault system associated with a compatible ESE-WNW normal fault system. The asymmetrical morphologies of the two delta-fan bodies confirm this configuration as tectonic induced deposits. References Braga, J.C., Martín, J.M. and Alcalá, B. (1990). Coral reefs in coarse-terrigenous sedimentary environments (Upper Tortonian, Granada Basin, southern Spain). Sedimentary Geology, 66, pp 135-150. Clark, S.J.P.and Dempster, T.J. (2009). The record of tectonic denudation and erosion in an emerging orogen: an apatite fission-track study of the Sierra Nevada, southern Spain. Journal of the Geological Society, London, Vol. 166, pp. 87-100. Dabrio, C.J., Fernández, J., Peña, J., Ruíz-Bustos, A. y Sanz de Galdeano, C. (1978). Rasgos sedimentarios de los conglomerados miocénicos del borde noreste de la Depresión de Granada. Estudios Geológicos, 34, pp 89-97. García-García, F., Fernández, J., Viseras, C. and Soria, J.M. (2006). Architecture and sedimentary facies evolution in a delta stack controlled by fault growth (Betic Cordillera, southern Spain, late Tortonian). Sedimentary Geology, 185, pp. 79-92. García-García, F., Viseras, C. and Fernández, J. (1999). Organización secuencial de abanicos deltaicos controlados por la tectónica (Tortoniense superior, cuenca de Granada, Cordillera Bética). Rev. Soc. Geol. España, 12 (2): 199-208.

  14. AGUA, SALUD Y SOCIEDAD EN LA SIERRA DE GUADARRAMA, 1890-1936. EL MANANTIAL DE AGUAS MINERO-MEDICINALES DE LA PORQUERIZA Y EL BALNEARISMO EN GUADARRAMA (COMUNIDAD DE MADRID

    Directory of Open Access Journals (Sweden)

    Miguel Ángel Soto Caba

    2015-01-01

    Full Text Available La explotación y uso medicinal de los manantiales de la localidad de Guadarrama (Comunidad de Madrid se desarrolló durante el primer tercio del siglo XX, cuando en esta localidad se construyeron balnearios, colonias y centros de salud, en un contexto de cambios en la organización del sistema de salud y de implantación de las ideas defendidas por médicos higienistas y del movimiento Regeneracionista. En torno al manantial de La Porqueriza se constituyó una colonia veraniega, formada principalmente por miembros de la burguesía madrileña, con modos de vida saludables que apreciaba las propiedades medicinales del agua, el aire y el paisaje de la Sierra de Guadarrama en contraposición de los problemas sanitarios de la urbe madrileña.Abstract: The exploitation and use of medicinal springs in the town of Guadarrama (Community of Madrid occurred during the first third of the twentieth century, when resorts, colonies, and health centers were built, in a context of changes in the health system organization and the implementation of ideas then defended by hygienists doctors and regenerationists. Around the La Porqueriza spring a summer colony was formed, consisting mainly of members of the bourgeoisie of Madrid, who practiced healthy lifestyles and appreciated the medicinal properties of water, air and the landscape of the Sierra de Guadarrama which contrasted with health problems of Madrid.

  15. Potencial del Agua del suelo

    Directory of Open Access Journals (Sweden)

    Bustamante Heliodoro

    1986-12-01

    Full Text Available La energía potencial del agua presenta diferencias de un punto del suelo a otro; esas diferencias son las que originan el movimiento del agua de acuerdo a la tendencia universal de la materia en el sentido de moverse de donde la energía potencial es mayor a donde dicha energía es menor. En el suelo el agua en consecuencia se mueve hacia donde su energía decrece hasta lograr su estado de equilibrio. Se desprende entonces que la cantidad de energía potencial absoluta contenida en el agua, no es importante por sí misma, sino por su relación con la energía en diferentes lugares dentro del suelo. El concepto Potencial de agua del suelo es un criterio para esta energía.

  16. MITIGACIÓN DEL ESTRÉS CALÓRICO DURANTE EL PREPARTO EN VACAS LECHERAS

    Directory of Open Access Journals (Sweden)

    G. D. TOFFOLI

    2017-06-01

    Full Text Available Se utilizaron 30 vacas en preparto que se alojaron en un corral seco con acceso a sombra artificial durante el verano. Las vacas fueron distribuidas en dos grupos: sin refrescado (TS y con refrescado (TR en el sector comedero. El peso corporal y la condición corporal fueron evaluadas al inicio y a los 25 días. La frecuencia respiratoria se realizó dos veces por semana en cuatro momentos del día. El registro de comportamiento dos veces a la semana. Los datos de analizaron con t Student y χ2. El peso y condición corporal no presentaron diferencia signifi cativa. Se observó un efecto del tratamiento en el día y horario para la frecuencia respiratoria (p<0,0001. La conducta de parado a la sombra fue al que dedicaron mayor tiempo en ambos tratamientos 27 % en TS y 29 % en TR. No hubo diferencias en la producción lechera entre TS y TR: 31,4 l/v/d y 30,6 l/v/d respectivamente.

  17. Holocene glaciation of the central Sierra Nevada, California

    Science.gov (United States)

    Bowerman, Nicole D.; Clark, Douglas H.

    2011-05-01

    Sediment cores from two bedrock-dammed lakes in North Fork Big Pine Creek, Sierra Nevada, California, preserve the most detailed and complete record of Holocene glaciation yet recovered in the region. The lakes are fed by outwash from the Palisade Glacier, the largest (˜1.3 km 2) and presumably longest-lived glacier in the range, and capture essentially all of the rock flour it produces. Distinct late-Holocene (Matthes) and late-Pleistocene (Recess Peak) moraines lie between the modern glacier and the lakes. The lakes have therefore received continuous sedimentation from the basin since the retreat of the Tioga glacier (Last Glacial Maximum) and capture rock flour related to all post-LGM advances. A total of eight long cores (up to 5.5 m sediment depth) and one short surface sediment short core preserve a coherent record of fluctuating rock flour flux to the lakes through the Holocene. Age constraints on rock flour spikes in First and Second lakes based on 31 14C-dated macrofossils indicate Holocene glaciation began ˜3200 cal yr B P, followed by a possible glacier maximum at ˜2800 cal yr B P and four distinct glacier maxima at ˜2200, ˜1600, ˜700 and ˜250-170 cal yr. B.P., the most recent maximum being the largest. Reconstruction of the equilibrium-line altitudes (ELA) associated with each distinct advance recorded in the moraines (Recess Peak, Matthes, and modern) indicates ELA depressions (relative to modern) of ˜250 m and 90 m for Recess Peak and Matthes advances, respectively. These differences represent decreases in summer temperatures of 1.7-2.8 °C (Recess Peak) and 0.2-2° (Matthes), and increases in winter precipitation of 22-34 cm snow water equivalent (s.w.e.) (Recess Peak) and 3-26 cm s.w.e. (Matthes) compared to modern conditions. Although small, these changes are significant and similar to those noted in the Cascade Range to the north, and represent a significant departure from historical climate trends in the region.

  18. Paleozoic and Mesozoic deformations in the central Sierra Nevada, California

    Science.gov (United States)

    Nokleberg, Warren J.; Kistler, Ronald Wayne

    1980-01-01

    Analysis of structural and stratigraphic data indicates that several periods of regional deformation, consisting of combined folding, faulting, cataclasis, and regional metamorphism, occurred throughout the central Sierra Nevada during Paleozoic and Mesozoic time. The oldest regional deformation occurred alono northward trends during the Devonian and Mississippian periods in most roof pendants containing lower Paleozoic metasedimentary rocks at the center and along the crest of the range. This deformation is expressed in some roof pendants by an angular unconformity separating older thrice-deformed from younger twice-deformed Paleozoic metasedimentary rocks. The first Mesozoic deformation, which consisted of uplift and erosion and was accompanied by the onset of Andean-type volcanism during the Permian and Triassic, is expressed by an angular unconformity in several roof pendants from the Saddlebag Lake to the Mount Morrison areas. This unconformity is defined by Permian and Triassic andesitic to rhyolitic metavolcanic rocks unconformably overlying more intensely deformed Pennsylvanian, Permian(?), and older metasedimentary rocks. A later regional deformation occurred during the Triassic along N. 20?_30? W. trends in Permian and Triassic metavolcanic rocks of the Saddlebag Lake and Mount Dana roof pendants, in upper Paleozoic rocks of the Pine Creek roof pendant, and in the Calaveras Formation of the western metamorphic belt; the roof pendants are crosscut by Upper Triassic granitic rocks of the Lee Vining intrusive epoch. A still later period of Early and Middle Jurassic regional deformation occurred along N. 30?-60? E. trends in upper Paleozoic rocks of the Calaveras Formation of the western metamorphic belt. A further period of deformation was the Late Jurassic Nevadan orogeny, which occurred along N. 20?_40? W. trends in Upper Jurassic rocks of the western metamorphic belt that are crosscut by Upper Jurassic granitic rocks of the Yosemite intrusive epoch

  19. Influence of anuran prey on the condition and distribution of Rana muscosa in the Sierra Nevada

    Science.gov (United States)

    K.L. Pope; K.R. Matthews

    2002-01-01

    Mountain yellow-legged frogs (Rana muscosa) at high elevations of the Sierra Nevada must obtain enough food during summer to survive 7–9 winter months when their aquatic habitats are frozen and food is presumably unavailable. Adults of R. muscosa prey on a variety of organisms, including aquatic and terrestrial invertebrates and...

  20. Sierra Leone Journal of Biomedical Research - Vol 5, No 1 (2013)

    African Journals Online (AJOL)

    Assessment of the Therapeutic Efficacy of Two Artemisinin-Based Combinations in the Treatment of Uncomplicated Falciparum Malaria among Children Under ... The Use of Mobile Electronic Devices for Public Health Data Collection and Syndromic Surveillance at the Republic Of Sierra Leone Armed Forces · EMAIL FREE ...

  1. Child mental health in Sierra Leone : A survey and exploratory qualitative study

    NARCIS (Netherlands)

    Yoder, H.N.C.; Tol, W.A.; Reis, R.; de Jong, J.T.V.M.

    2016-01-01

    Background This study complements the growing amount of research on the psychosocial impact of war on children in Sierra Leone by examining local perceptions of child mental health, formal and informal care systems, help-seeking behaviour and stigma. Methods The study combined: (1) a nationwide

  2. Climate change and fire regimes in the Sierra de Manantlan, Mexico

    Science.gov (United States)

    Brooke A. Cassell; Ernesto Alvarado; Emily Heyerdahl; Diego Perez-Salicrup; Enrique Jardel-Pelaez

    2010-01-01

    Fire has been attributed as one of the most influential factors in vegetation community and succession in the Sierra de Manantlán Biosphere Reserve in Jalisco and Colima, México. A mosaic of low, mixed and high severity fire regimes characterizes the landscape with ecosystems ranging from mesophyllous mountain forest to higher elevation pine and oak forest. Research...

  3. 75 FR 42601 - Establishment of the Sierra Pelona Valley Viticultural Area (2010R-004P)

    Science.gov (United States)

    2010-07-22

    ...; Treasury decision. SUMMARY: This Treasury decision establishes the 9.7-square mile ``Sierra Pelona Valley... purchase. DATES: Effective Date: August 23, 2010. FOR FURTHER INFORMATION CONTACT: Christina McMahon... origin of their wines to consumers and helps consumers to identify wines they may purchase. Establishment...

  4. Aspen in the Sierra Nevada: Regional conservation of a continental species

    Science.gov (United States)

    Paul C. Rogers; Wayne D. Shepperd; Dale L. Bartos

    2007-01-01

    Quaking aspen (Populus tremuloides Michx.) a common species in North America, is a minor species in the Sierra Nevada of California. However, the limited coverage of aspen in this area appears to carry a disproportionate biodiversity load: numerous species are dependent on the unique components of aspen forests habitat. Land managers in the region...

  5. Petrography of the Paleogene Volcanic Rocks of the Sierra Maestra, Southeastern Cuba

    Science.gov (United States)

    Bemis, V. L.

    2006-12-01

    This study is a petrographic analysis of over 200 specimens of the Paleogene volcanic rocks of the Sierra Maestra (Southerneastern Cuba), a key structure in the framework of the northern Caribbean plate boundary evolution. The purpose of this study is to understand the eruptive processes and the depositional environments. The volcanic sequence in the lower part of the Sierra Maestra begins with highly porphyritic pillow lavas, topped by massive tuffs and autoclastic flows. The presence of broken phenocrystals, palagonitic glass and hyaloclastites in this section of the sequence suggests that the prevalent mode of eruption was explosive. The absence of welding in the tuffs suggests that the rocks were emplaced in a deep submarine environment. Coherent flows, much less common than the massive tuffs, show evidence of autoclastic fracturing, also indicating low temperature-submarine environments. These observations support the hypothesis that the Sierra Maestra sequence may be neither part of the Great Antilles Arc of the Mesozoic nor any other fully developed volcanic arc, rather a 250 km long, submarine eruptive system of dikes, flows and sills, most likely a back-arc structure. The volcanic rocks of the upper sequence are all very fine grained, reworked volcaniclastic materials, often with the structures of distal turbidities, in mode and texture similar to those drilled on the Cayman Rise. This study suggests that the Sierra Maestra most likely records volcanism of diverse sources: a local older submarine source, and one or more distal younger sources, identifiable with the pan-Caribbean volcanic events of the Tertiary.

  6. Training for Innovation: Capacity-Building in Agricultural Research in Post-War Sierra Leone

    Science.gov (United States)

    Gboku, Matthew L. S.; Bebeley, Jenneh F.

    2016-01-01

    This paper examines how the Sierra Leone Agricultural Research Institute (SLARI) used training and development to build capacity for innovation in agricultural research following the country's civil war which ended in 2002. The Institute's training for innovation addressed different agricultural product value chains (APVCs) within the framework of…

  7. Fire weather and large fire potential in the northern Sierra Nevada

    Science.gov (United States)

    Brandon M. Collins

    2014-01-01

    Fuels, weather, and topography all contribute to observed fire behavior. Of these, weather is not only the most dynamic factor, it is the most likely to be directly influenced by climate change. In this study 40 years of daily fire weather observations from five weather stations across the northern Sierra Nevada were analyzed to investigate potential changes or trends...

  8. Role of oaks in fisher habitat quality in the Sierra Nevada mountains at multiple spatial scales

    Science.gov (United States)

    Craig M. Thompson; Kathryn Purcell; Rebecca Green; Richard. Sweitzer

    2015-01-01

    Fishers (Pekania pennanti) occur in ponderosa pine, mixed conifer, and mixed hardwood conifer habitats in the southern Sierra Nevada at elevations from approximately 1400 to 2300 m. They are a candidate species for listing under both the Federal and California Endangered Species Acts. Since 2007, the U.S. Department of Agriculture, Forest Service (...

  9. Survival of fishers in the southern Sierra Nevada region of California

    Science.gov (United States)

    Richard A. Sweitzer; Craig M. Thompson; Rebecca E. Green; Reginald H. Barrett; Kathryn L. Purcell

    2015-01-01

    Fishers in the western United States were recently proposed for listing under the U.S. Endangered Species Act because of concerns for loss of suitable habitat and evidence of a diversity of mortality risks that reduce survival. One of 2 remnant populations of fishers in California is in the southern Sierra Nevada region, where we studied them at 2 research sites in the...

  10. Hacia una Estrategia de Desarrollo para la Sierra Rural en el Perú

    NARCIS (Netherlands)

    Escobal, J.A.; Valdivia, L.

    2004-01-01

    El objetivo de este proyecto es elaborar un documento que establezca los lineamientos de una política de desarrollo para la Sierra rural en el Perú e identificar los requerimientos institucionales y de investigación complementaria que se requerirían para la construcción de programas específicos que

  11. The Role of Religion During and After the Civil War in Sierra Leone ...

    African Journals Online (AJOL)

    Civil wars in Africa are renowned for their strong religious elements, with religion being used for different purposes and in different capacities. Sierra Leone's civil war (1991-2002), known also as the “rebel war,” had significant religious dimensions. The warring factions used religion for their gain. Beyond that, Muslim and ...

  12. Socio-Ecological Factors Affecting Pregnant Women's Anemia Status in Freetown, Sierra Leone

    Science.gov (United States)

    M'Cormack, Fredanna; Drolet, Judy

    2012-01-01

    Background: Sierra Leone has high maternal mortality. Socio-ecological factors are considered contributing factors to this high mortality. Anemia is considered to be a direct cause of 4% of maternal deaths and an indirect cause of 20-40% of maternal deaths. Purpose: The current study explores socio-ecological contributing factors to the anemia…

  13. Snowmelt runoff and water yield along elevation and temperature gradients in California's southern Sierra Nevada

    Science.gov (United States)

    Carolyn T. Hunsaker; Thomas W. Whitaker; Roger C. Bales

    2012-01-01

    Differences in hydrologic response across the rain-snow transition in the southern Sierra Nevada were studied in eight headwater catchments – the Kings River Experimental Watersheds – using continuous precipitation, snowpack, and streamflow measurements. The annual runoff ratio (discharge divided by precipitation) increased about 0.1 per 300 m of mean catchment...

  14. Roadless area-intensive management tradeoffs on the Sierra National Forest, California

    Science.gov (United States)

    Robert J. Hrubes; Kent P. Connaughton; Robert W. Sassaman

    1979-01-01

    This hypothesis was tested by a linear programing model: Roadless areas on the Sierra National Forest precluded from planned future development would be candidates for wilderness designation, and the associated loss in present and future timber harvests could be offset by investing in more intensive management. The results of this simulation test suggest that levels of...

  15. Evaluating avian-habitat relationships models in mixed-conifer forests of the Sierra Nevada

    Science.gov (United States)

    Kathryn L. Purcell; Sallie J. Hejl; Terry A. Larson

    1992-01-01

    Using data from two studies in the southern and central Sierra Nevada, we compared the presence and abundance of bird species breeding in mixedconifer forests during 1978-79 and 1983-85 to predictions &om the California Wildlife Habitat Relationships (WHR) System. Twelve percent of the species observed in either study were not predicted by the WHR database to occur...

  16. Sierra Leone's Former Child Soldiers: A Longitudinal Study of Risk, Protective Factors, and Mental Health

    Science.gov (United States)

    Betancourt, Theresa S.; Brennan, Robert T.; Rubin-Smith, Julia; Fitzmaurice, Garrett M.; Gilman, Stephen E.

    2010-01-01

    Objective: To investigate the longitudinal course of internalizing and externalizing problems and adaptive/prosocial behaviors among Sierra Leonean former child soldiers and whether postconflict factors contribute to adverse or resilient mental health outcomes. Method: Male and female former child soldiers (N = 260, aged 10 to 17 years at…

  17. A national survey of rice ( Oryza sativa L.) grain quality in Sierra ...

    African Journals Online (AJOL)

    As Sierra Leone approaches self-sufficiency in rice, against a backdrop of agricultural commercialization, the dynamics of the rice grain production and consumption will increasingly be driven by the quality of grains demanded by consumers to be produced by farmers and marketed by traders in the open market.

  18. Silviculture-ecology of forest-zone hardwoods in the Sierra Nevada

    Science.gov (United States)

    Philip M. McDonald; John C. Tappeiner

    1996-01-01

    Although the principal hardwood species in the forest zone of the Sierra Nevada (California black oak, tanoak, Pacific madrone, and canyon live oak) are key components of many ecosystems, they have received comparatively little study. Currently they are underutilized and unmanaged. This paper brings together what is known on the silviculture-ecology of these species...

  19. Reconstruction versus Transformation: Post-War Education and the Struggle for Gender Equity in Sierra Leone

    Science.gov (United States)

    Maclure, Richard; Denov, Myriam

    2009-01-01

    In post-war contexts, education is widely regarded as essential not only for civic reconciliation, but also as a key force for gender equity. In Sierra Leone, however, despite enhanced educational opportunities for girls, much of the emphasis on post-war educational reconstruction is unlikely to rectify gender inequities that remain entrenched…

  20. Carbon and nutrient contents in soils from the Kings River Experimental Watersheds, Sierra Nevada Mountains, California

    Science.gov (United States)

    D.W. Johnson; C.T. Hunsaker; D.W. Glass; B.M. Rau; B.A. Roath

    2011-01-01

    Soil C and nutrient contents were estimated for eight watersheds in two sites (one high elevation, Bull, and one low elevation, Providence) in the Kings River Experimental Watersheds in the western Sierra Nevada Mountains of California. Eighty-seven quantitative pits were dug to measure soil bulk density and total rock content, while three replicate surface samples...

  1. Genotypic anomaly in ebola virus strains circulating in magazine wharf Area, Freetown, Sierra Leone, 2015

    NARCIS (Netherlands)

    S.L. Smits (Saskia); S.D. Pas (Suzan); C.B.E.M. Reusken (Chantal); B.L. Haagmans (Bart); P. Pertile; C. Cancedda; K. Dierberg; I. Wurie; A. Kamara; D. Kargbo; S.L. Caddy; A. Arias; L. Thorne; J. Lu; U. Jah; I. Goodfellow; M.P.G. Koopmans D.V.M. (Marion)

    2015-01-01

    textabstractThe Magazine Wharf area, Freetown, Sierra Leone was a focus of ongoing Ebola virus transmission from late June 2015. Viral genomes linked to this area contain a series of 13 T to C substitutions in a 150 base pair intergenic region downstream of viral protein 40 open reading frame,

  2. commercial drinking water quality and safety in bo city, sierra leone

    African Journals Online (AJOL)

    Sierra Leone Journal of Biomedical Research ... These include 6 water sources and the production facilities for 10 brands of machine-filled factory-produced water sachets as well as the 10 sources and finished samples for ... Workers at all of these facilities were also interviewed about their knowledge and practices.

  3. Sierra Nevada grasslands: interactions between livestock grazing and ecosystem structure and function

    Science.gov (United States)

    Barbara H. Allen-Diaz

    2004-01-01

    Livestock grazing plays an integral role in the grass-dominated ecosystems of the Sierra Nevada. Grazing has been asserted to influence such key ecological characteristics as water quality, net primary productivity, nutrient cycling, plant and animal diversity, wildlife habitat availability, and oak regeneration (Belsky and others 1999, Kauffmann and Krueger 1984)....

  4. Culture and environment in the Sierra de Misantla, Veracruz, Mexico: the case of Oecopetalum mexicanum

    Science.gov (United States)

    Maite Lascurain; Citlalli Lopez-Binnquist; Marla R. Emery

    2016-01-01

    We analyze the cultural and environmental dimensions of foraging the wild edible fruit cachichín (Oecopetalum mexicanum) in the Sierra de Misantla in central Veracruz, Mexico, including gathering practices, social organization, subsistence, commerce, and consumption. Gathering cachichín brings...

  5. Using epiphytic macrolichen communities for biomonitoring ammonia in forests of the greater Sierra Nevada, California

    Science.gov (United States)

    Sarah Jovan; Bruce. Mccune

    2006-01-01

    Chronic, excessive nitrogen deposition is potentially an important ecological threat to forests of the greater Sierra Nevada in California. We developed a model for ammonia bioindication, a major nitrogen pollutant in the region, using epiphytic macrolichens. We used non-metric multidimensional scaling to extract gradients in lichen community composition from surveys...

  6. Verification Tests for Sierra/SM's Reproducing Kernal Particle Method

    Energy Technology Data Exchange (ETDEWEB)

    Giffin, Brian D. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-09-01

    This report seeks to verify the proper implemention of RKPM within Sierra by comparing the results from several basic example problems excecuted with RKPM against the analytical and FEM solutions for these same problems. This report was compiled as a summer student intern project.

  7. PARTITIONING OF WATER FLUX IN A SIERRA NEVADA PONDEROSA PINE PLANTATION. (R826601)

    Science.gov (United States)

    The weather patterns of the west side of the Sierra Nevada Mountains (cold, wet winters and hot, dry summers) strongly influence how water is partitioned between transpiration and evaporation and result in a specific strategy of water use by ponderosa pine trees (Pinus pond...

  8. The Violence of Peace and the Role of Education: Insights from Sierra Leone

    Science.gov (United States)

    Novelli, Mario; Higgins, Sean

    2017-01-01

    Research on peacebuilding has mushroomed over the last decade and there is a growing interest in the role of education in supporting peacebuilding processes. This paper engages with these debates, UN peacebuilding activities and the location of education initiatives therein, through a case study of Sierra Leone. In the first part, we explore the…

  9. Black bear abundance, habitat use, and food habits in the Sierra San Luis, Sonora, Mexico

    Science.gov (United States)

    Rodrigo Sierra Corona; Ivan A. Sayago Vazquez; M. del Carmen Silva Hurtado; Carlos A. Lopez Gonzalez

    2005-01-01

    We studied black bears to determine habitat use, food habits, and abundance between April 2002 and November 2003 in the Sierra San Luis, Sonora. We utilized transects to determine spoor presence, camera traps for abundance, and scat analysis. During 2002, bears fed principally on plant material, and for 2003 on animal matter, namely livestock. Habitat use differed...

  10. School Persistence in the Wake of War: Wartime Experiences, Reintegration Supports, and Dropout in Sierra Leone

    Science.gov (United States)

    Zuilkowski, Stephanie Simmons; Betancourt, Theresa S.

    2014-01-01

    This article examines the relationship of wartime experience and reintegration supports to students' risk of school dropout. It draws on longitudinal, mixed-methods data collected among children and youth in Sierra Leone from 2002 through 2008. The study finds that family financial support and perceived social support are positively associated…

  11. West nile virus anti-body surveillance in three Sierra Nevada raptors of conservation concern

    Science.gov (United States)

    J.M. Hull; J.J. Keane; L.A. Tell; H.B. Ernest

    2010-01-01

    West Nile virus (WNV) infection has caused high levels of mortality in North American hawks and owls. To investigate the extent of infection among raptors of conservation concern in the Sierra Nevada, we tested 62 Northern Goshawks (Accipiter gentilis), 209 Spotted Owls (Strix occidentalis), and 22 Great Gray Owls (...

  12. Learning Curve Characteristics for Caesarean Section Among Associate Clinicians : A Prospective Study from Sierra Leone

    NARCIS (Netherlands)

    Waalewijn, B.P.; van Duinen, A.; Koroma, A. P.; Rijken, M. J.; Elhassein, M.; Bolkan, H. A.

    2017-01-01

    Background: In response to the high maternal mortality ratio, Sierra Leone has adopted an associate clinician postgraduate surgical task-sharing training programme. Little is known about learning curve characteristics for caesarean sections among associate clinicians. The aim of this study is to

  13. Converts to human rights? Popular debate about war and justice in rural central Sierra Leone

    NARCIS (Netherlands)

    Archibald, S.; Richards, P.

    2002-01-01

    Internationally, war in Sierra Leone (1991-2002) is regarded as an instance of violent conflict driven by economic factors (attempts to control the mining of alluvial diamonds). Fieldwork (2000-01) in rural areas recovering from war suggests a very different picture. War victims and combatants from

  14. Management of rice seed during insurgency : a case study in Sierra Leone

    NARCIS (Netherlands)

    Mokuwa, G.A.

    2015-01-01

    Keywords: Technography, Oryza glaberrima, Oryza sativa, farmer hybrids, sub-optimal agriculture, farmer adaptive management, plant genetic resources, peace and extreme (wartime) conditions, local seed channels, selection for robustness, Sierra Leone, West Africa.

  15. Burn Severity and Its Impact on Soil Properties: 2016 Erskine Fire in the Southern Sierra Nevada

    Science.gov (United States)

    Haake, S.; Guo, J.; Krugh, W. C.

    2017-12-01

    Wildfire frequency in the southern Sierra Nevada has increased over the past decades. The effects of wildfires on soils can increase the frequency of slope failure and debris flow events, which pose a greater risk to people, as human populations expand into foothill and mountainous communities of the Sierra Nevada. Alterations in the physical properties of burned soils are one such effect that can catalyze slope failure and debris flow events. Moreover, the degree of a soil's physical alteration resulting from wildfire is linked to fire intensity. The 2016 Erskine fire occurred in the southern Sierra Nevada, burning 48,019 acres, resulting in soils of unburned, low, moderate, and high burn severities. In this study, the physical properties of soils with varying degrees of burn severity are explored within the 2016 Erskine fire perimeter. The results constrain the effects of burn severity on soil's physical properties. Unburned, low, moderate, and high burn severity soil samples were collected within the Erskine fire perimeter. Alterations in soils' physical properties resulting from burn severity are explored using X-ray diffractometry analysis, liquid limit, plastic limit, and shear strength tests. Preliminary results from this study will be used to assess debris flow and slope failure hazard models within burned areas of the Kern River watershed in the southern Sierra Nevada.

  16. From Typology to Topography in Clarence King's "Mountaineering in the Sierra Nevada."

    Science.gov (United States)

    Hoekzema, Loren

    The book "Mountaineering in the Sierra Nevada" by Clarence King, a late-ninteenth-century American geologist, writer, art critic, and romantic, is discussed in this paper. In the writing and revision of this book, King was attempting a metamorphosis of landscape description into popular reading as he moved from being a symbolic writer to…

  17. Developing and managing sustainable forest ecosystems for spotted owls in the Sierra Nevada

    Science.gov (United States)

    J. Verner; K.S. McKelvey

    1994-01-01

    Studies of the California spotted owl have revealed significant selection for habitats with large, old trees; relatively high basal areas of snags; and relatively high biomass in large, downed logs. Based on planning documents for national forests in the Sierra Nevada, we projected declining amounts of older-forest attributes. Region 5 has adopted measures to retain...

  18. La campagne pour un quota de femmes en politique en Sierra ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    1 nov. 2011 ... Aisha Ibrahim est directrice du Gender Research and Documentation ... Comme elles travaillaient toutes à faire avancer des causes différentes, ... et qu'il n'existe pas de discrimination à l'endroit des femmes en Sierra Leone.

  19. Empowering Women through Education: Evidence from Sierra Leone. NBER Working Paper No. 18016

    Science.gov (United States)

    Mocan, Naci H.; Cannonier, Colin

    2012-01-01

    We use data from Sierra Leone where a substantial education program provided increased access to education for primary-school age children but did not benefit children who were older. We exploit the variation in access to the program generated by date of birth and the variation in resources between various districts of the country. We find that…

  20. Stratigraphy and Mesozoic–Cenozoic tectonic history of northern Sierra Los Ajos and adjacent areas, Sonora, Mexico

    Science.gov (United States)

    Page, William R.; Gray, Floyd; Iriondo, Alexander; Miggins, Daniel P.; Blodgett, Robert B.; Maldonado, Florian; Miller, Robert J.

    2010-01-01

    Geologic mapping in the northern Sierra Los Ajos reveals new stratigraphic and structural data relevant to deciphering the Mesozoic–Cenozoic tectonic evolution of the range. The northern Sierra Los Ajos is cored by Proterozoic, Cambrian, Devonian, Mississippian, and Pennsylvanian strata, equivalent respectively to the Pinal Schist, Bolsa Quartzite and Abrigo Limestone, Martin Formation, Escabrosa Limestone, and Horquilla Limestone. The Proterozoic–Paleozoic sequence is mantled by Upper Cretaceous rocks partly equivalent to the Fort Crittenden and Salero Formations in Arizona, and the Cabullona Group in Sonora, Mexico.Absence of the Upper Jurassic–Lower Cretaceous Bisbee Group below the Upper Cretaceous rocks and above the Proterozoic–Paleozoic rocks indicates that the Sierra Los Ajos was part of the Cananea high, a topographic highland during the Late Jurassic and Early Cretaceous. Deposition of Upper Cretaceous rocks directly on Paleozoic and Proterozoic rocks indicates that the Sierra Los Ajos area had subsided as part of the Laramide Cabullona basin during Late Cretaceous time. Basal beds of the Upper Cretaceous sequence are clast-supported conglomerate composed locally of basement (Paleozoic) clasts. The conglomerate represents erosion of Paleozoic basement in the Sierra Los Ajos area coincident with development of the Cabullona basin.The present-day Sierra Los Ajos reaches elevations of greater than 2600 m, and was uplifted during Tertiary basin-and-range extension. Upper Cretaceous rocks are exposed at higher elevations in the northern Sierra Los Ajos and represent an uplifted part of the inverted Cabullona basin. Tertiary uplift of the Sierra Los Ajos was largely accommodated by vertical movement along the north-to-northwest-striking Sierra Los Ajos fault zone flanking the west side of the range. This fault zone structurally controls the configuration of the headwaters of the San Pedro River basin, an important bi-national water resource in the US

  1. El origen del lenguaje : la evidencia paleontológica

    Directory of Open Access Journals (Sweden)

    Martínez Mendizabal, Ignacio

    2009-01-01

    Full Text Available El estudio del origen y evolución del lenguaje es un campo que puede ser contemplado desde el análisis del registro paleontológico, que nos permite establecer qué especies fósiles dispusieron de las características morfológicas asociadas a la producción y percepción del lenguaje hablado. La Teoría matemática de la Información de Claude E. Shannon ofrece el apropiado marco teórico para relacionar los distintos aspectos del fenómeno de la comunicación a través de las adaptaciones óseas de las especies pretéritas. Los descubrimientos e investigaciones realizados en las pasadas dos décadas en el yacimiento mesopleistoceno de la Sima de los Huesos (Sierra de Atapuerca y la revisión de los fósiles humanos del Pleistoceno medio de África y Europa y de ejemplares neandertales muestra que el linaje de los neandertales (Homo heidelbergensis, Homo neanderthalensis ya existía un conjunto de adaptaciones anatómicas relacionadas con la presencia de un sistema de comunicación oral muy eficiente.

  2. Scaling up family planning in Sierra Leone: A prospective cost-benefit analysis.

    Science.gov (United States)

    Keen, Sarah; Begum, Hashina; Friedman, Howard S; James, Chris D

    2017-12-01

    Family planning is commonly regarded as a highly cost-effective health intervention with wider social and economic benefits. Yet use of family planning services in Sierra Leone is currently low and 25.0% of married women have an unmet need for contraception. This study aims to estimate the costs and benefits of scaling up family planning in Sierra Leone. Using the OneHealth Tool, two scenarios of scaling up family planning coverage to currently married women in Sierra Leone over 2013-2035 were assessed and compared to a 'no-change' counterfactual. Our costing included direct costs of drugs, supplies and personnel time, programme costs and a share of health facility overhead costs. To monetise the benefits, we projected the cost savings of the government providing five essential social services - primary education, child immunisation, malaria prevention, maternal health services and improved drinking water - in the scale-up scenarios compared to the counterfactual. The total population, estimated at 6.1 million in 2013, is projected to reach 8.3 million by 2035 in the high scenario compared to a counterfactual of 9.6 million. We estimate that by 2035, there will be 1400 fewer maternal deaths and 700 fewer infant deaths in the high scenario compared to the counterfactual. Our modelling suggests that total costs of the family planning programme in Sierra Leone will increase from US$4.2 million in 2013 to US$10.6 million a year by 2035 in the high scenario. For every dollar spent on family planning, Sierra Leone is estimated to save US$2.10 in expenditure on the five selected social sector services over the period. There is a strong investment case for scaling up family planning services in Sierra Leone. The ambitious scale-up scenarios have historical precedent in other sub-Saharan African countries, but the extent to which they will be achieved depends on a commitment from both the government and donors to strengthening Sierra Leone's health system post-Ebola.

  3. Fumarole/plume and diffuse CO2 emission from Sierra Negra volcano, Galapagos archipelago

    Science.gov (United States)

    Padron, E.; Hernandez Perez, P. A.; Perez, N.; Theofilos, T.; Melian, G.; Barrancos, J.; Virgil, G.; Sumino, H.; Notsu, K.

    2009-12-01

    The active shield-volcano Sierra Negra is part of the Galapagos hotspot. Sierra Negra is the largest shield volcano of Isabela Island, hosting a 10 km diameter caldera. Ten historic eruptions have occurred and some involved a frequently visited east caldera rim fissure zone called Volcan Chico. The last volcanic event occurred in October 2005 and lasted for about a week, covering approximately twenty percent of the eastern caldera floor. Sierra Negra volcano has experienced some significant changes in the chemical composition of its volcanic gas discharges after the 2005 eruption. This volcanic event produced an important SO2 degassing that depleted the magmatic content of this gas. Not significant changes in the MORB and plume-type helium contribution were observed after the 2005 eruption, with a 65.5 % of MORB and 35.5 % of plume contribution. In 2006 a visible and diffuse gas emission study was performed at the summit of Sierra Negra volcano, Galapagos, to evaluate degassing rate from this volcanic system. Diffuse degassing at Sierra Negra was mainly confined in three different DDS: Volcan Chico, the southern inner margin of the caldera, and Mina Azufral. These areas showed also visible degassing, which indicates highly fractured areas where volcano-hydrothermal fluids migrate towards surface. A total fumarole/plume SO2 emission of 11 ± 2 td-1 was calculated by mini-DOAS ground-based measurements at Mina Azufral fumarolic area. Molar ratios of major volcanic gas components were also measured in-situ at Mina Azufral with a portable multisensor. The results showed H2S/SO2, CO2/SO2 and H2O/SO2 molar ratios of 0.41, 52.2 and 867.9, respectively. Multiplying the observed SO2 emission rate times the observed (gas)i/SO2 mass ratio we have estimated other volatiles emission rates. The results showed that H2O, CO2 and H2S emission rates from Sierra Negra are 562, 394, and 2.4 t d-1, respectively. The estimated total output of diffuse CO2 emission from the summit of

  4. Active basement uplift as seen with cosmogenic lenses: the Sierra Pie de Palo case (Western Argentina)

    Science.gov (United States)

    Siame, L. L.; Sébrier, M.; Costa, C. H.; Ahumada, E. A.; Bellier, O.

    2013-12-01

    The Andean foreland of western Argentina (28°S-33°S) corresponds to retroarc deformations associated with the ongoing flat subduction of the Nazca plate beneath the South American lithosphere, and associated with high levels of seismic activity and crustal active faulting. To improve earthquake source identification and characterization in the San Juan region, data from seismology, structural geology and quantitative geomorphology can be integrated and combined to provide a seismotectonic model. In this model, the Andean back-arc of western Argentina has to be regarded as an obliquely converging foreland where Plio-Quaternary deformations are partitioned between strike-slip and thrust motions that are localized on the E-verging, thin-skinned Argentine Precordillera, and the W-verging thick-skinned Sierras Pampeanas, respectively. In this domain, the Sierra Pie de Palo is a key structure playing a major role in the partitioning of the Plio-Quaternary deformations. Located in the westernmost Sierras Pampeanas, the Sierra Pie de Palo forms a NNE striking, 80 km-long and 35-40 km-wide, ellipsoid range that reaches elevation as high as 3162 m. This mountain range is an actively growing basement fold associated with a high level of seismic activity (e.g., the November 23, 1977, Caucete, Mw 7.4 earthquake). To evaluate the degree of tectonic activity around the Sierra Pie de Palo, we combined a detailed morphometric analysis of the topography together with in situ-produced cosmogenic 10Be concentrations measured in (1) bedrock outcrops corresponding to the exhumed erosional regional surface, (2) surface boulders abandoned on alluvial fans deformed by active faults, and (3) in fluvial sediments sampled at the outlets of selected watersheds that drains out from the Sierra Pie de Palo. All together, our results allows: (1) assessing quantitative constraints on the rate of tectonic and denudation processes that are responsible for the active growth and erosion of the Sierra

  5. [Sierra of the Atapuerca, thinking about the evolution].

    Science.gov (United States)

    Carbonell, Eudald

    2007-01-01

    Homo sapiens walks to the future in a uncertain way. The fosil evidences from the lithosphere can help us to get into know the social and cultural evolution of all the species that have precede us and even our own. Atapuerca, with more than 1.2 MA old of fossilized history from the Pleistocene to the Holocene is throwing a scientific message through the study of all its archaeological sites. There are thousands of animal and human fossils in Trinchera del Ferrocarril, Cueva de Gran Dolina, Sima del Elefante and Galeria that yield information on the cultural cannibalism practices by Homo antecessor 900,000 years ago, and the hunting and gathering that Homo heidelbergensis developed 400,000 years ago. Finally in the Sima de los Huesos, with a similar chronology than at the H. heidelbergensis sites from the Trinchera del Ferrocarril, we find the first intentional accumulation of hominid bodies. These contributions are significant to the knowledge of the biological and cultural human evolution and permits to deepen it empirically. We hope that understanding the message we will be able to improve our species through the socialization of the scientific knowledge.

  6. Population dynamics of spotted owls in the Sierra Nevada, California

    Science.gov (United States)

    Blakesley, J.A.; Seamans, M.E.; Conner, M.M.; Franklin, A.B.; White, Gary C.; Gutierrez, R.J.; Hines, J.E.; Nichols, J.D.; Munton, T.E.; Shaw, D.W.H.; Keane, J.J.; Steger, G.N.; McDonald, T.L.

    2010-01-01

    The California spotted owl (Strix occidentalis occidentalis) is the only spotted owl subspecies not listed as threatened or endangered under the United States Endangered Species Act despite petitions to list it as threatened. We conducted a meta-analysis of population data for 4 populations in the southern Cascades and Sierra Nevada, California, USA, from 1990 to 2005 to assist a listing evaluation by the United States Fish and Wildlife Service. Our study areas (from N to S) were on the Lassen National Forest (LAS), Eldorado National Forest (ELD), Sierra National Forest (SIE), and Sequoia and Kings Canyon National Parks (SKC). These study areas represented a broad spectrum of habitat and management conditions in these mountain ranges. We estimated apparent survival probability, reproductive output, and rate of population change for spotted owls on individual study areas and for all study areas combined (meta-analysis) using model selection or model-averaging based on maximum-likelihood estimation. We followed a formal protocol to conduct this analysis that was similar to other spotted owl meta-analyses. Consistency of field and analytical methods among our studies reduced confounding methodological effects when evaluating results. We used 991 marked spotted owls in the analysis of apparent survival. Apparent survival probability was higher for adult than for subadult owls. There was little difference in apparent survival between male and female owls. Model-averaged mean estimates of apparent survival probability of adult owls varied from 0.811 ?? 0.021 for females at LAS to 0.890 ?? 0.016 for males at SKC. Apparent survival increased over time for owls of all age classes at LAS and SIE, for adults at ELD, and for second-year subadults and adults at SKC. The meta-analysis of apparent survival, which included only adult owls, confirmed an increasing trend in survival over time. Survival rates were higher for owls on SKC than on the other study areas. We analyzed data

  7. Macroeconomic costs of the unmet burden of surgical disease in Sierra Leone: a retrospective economic analysis.

    Science.gov (United States)

    Grimes, Caris E; Quaife, Matthew; Kamara, Thaim B; Lavy, Christopher B D; Leather, Andy J M; Bolkan, Håkon A

    2018-03-14

    The Lancet Commission on Global Surgery estimated that low/middle-income countries will lose an estimated cumulative loss of US$12.3 trillion from gross domestic product (GDP) due to the unmet burden of surgical disease. However, no country-specific data currently exist. We aimed to estimate the costs to the Sierra Leone economy from death and disability which may have been averted by surgical care. We used estimates of total, met and unmet need from two main sources-a cluster randomised, cross-sectional, countrywide survey and a retrospective, nationwide study on surgery in Sierra Leone. We calculated estimated disability-adjusted life years from morbidity and mortality for the estimated unmet burden and modelled the likely economic impact using three different methods-gross national income per capita, lifetime earnings foregone and value of a statistical life. In 2012, estimated, discounted lifetime losses to the Sierra Leone economy from the unmet burden of surgical disease was between US$1.1 and US$3.8 billion, depending on the economic method used. These lifetime losses equate to between 23% and 100% of the annual GDP for Sierra Leone. 80% of economic losses were due to mortality. The incremental losses averted by scale up of surgical provision to the Lancet Commission target of 80% were calculated to be between US$360 million and US$2.9 billion. There is a large economic loss from the unmet need for surgical care in Sierra Leone. There is an immediate need for massive investment to counteract ongoing economic losses. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  8. Estudio de metales pesados y arsénico en los suelos de olivar de Sierra Mágina, Jaén (España

    Directory of Open Access Journals (Sweden)

    Juan Carlos Menjivar Flores

    2009-10-01

    Full Text Available En Sierra Mágina, Jaén (España fueron seleccionados 35 suelos dedicados al cultivo del olivar en los que se estudió la concentración de cromo (Cr, níquel (Ni, cobre (Cu, plomo (Pb, Zinc (Zn y arsénico (As a profundidades entre 0 - 20 y 20 - 40 cm. Estos suelos se desarrollan sobre materiales carbonatados, predominando Calcisoles pétricos y Regosoles calcáricos (FAO, 1999. La homogeneidad del material parental es responsable de la ausencia de variaciones significativas en las propiedades de los suelos a las profundidades estudiadas, así como en el contenido de metales pesados y arsénico. El Cu es el único elemento que varía con la profundidad (p < 0.01, presentando un valor promedio más elevado entre 0 y 20 cm debido a la aplicación de controles fitosanitarios en los cultivos de la región. En los suelos con texturas arcillosa y limosa se presentan concentraciones más altas de Cr y Ni, mientras que el resto de metales analizados y el As no presentan variaciones significativas con las principales propiedades físicas y químicas de los suelos. Los elementos estudiados no exceden el nivel de referencia establecido para suelos por la Junta de Andalucía y presentan concentraciones similares a las encontradas en rocas equivalentes y en suelos no contaminados. Los valores promedio en As, Cr, Cu, Ni, Pb y Zn están relacionados con las concentraciones heredadas del material litológico del que se derivan.

  9. Estudio de metales pesados y arsénico en los suelos de olivar de Sierra Mágina, Jaén (España

    Directory of Open Access Journals (Sweden)

    Menjivar Flores Juan Carlos

    2009-12-01

    Full Text Available En Sierra Mágina, Jaén (España fueron seleccionados 35 suelos dedicados al cultivo del olivar en los que se estudió la concentración de cromo (Cr, níquel (Ni, cobre (Cu, plomo (Pb, Zinc (Zn y arsénico (As a profundidades entre 0 - 20 y 20 - 40 cm. Estos suelos se desarrollan sobre materiales carbonatados, predominando Calcisoles pétricos y Regosoles calcáricos (FAO, 1999. La homogeneidad del material parental es responsable de la ausencia de variaciones significativas en las propiedades de los suelos a las profundidades estudiadas, así como en el contenido de metales pesados y arsénico. El Cu es el único elemento que varía con la profundidad (p < 0.01, presentando un valor promedio más elevado entre 0 y 20 cm debido a la aplicación de controles fitosanitarios en los cultivos de la región. En los suelos con texturas arcillosa y limosa se presentan concentraciones más altas de Cr y Ni, mientras que el resto de metales analizados y el As no presentan variaciones significativas con las principales propiedades físicas y químicas de los suelos. Los elementos estudiados no exceden el nivel de referencia establecido para suelos por la Junta de Andalucía y presentan concentraciones similares a las encontradas en rocas equivalentes y en suelos no contaminados. Los valores promedio en As, Cr, Cu, Ni, Pb y Zn están relacionados con las concentraciones heredadas del material litológico del que se derivan.

  10. del alcoholismo

    Directory of Open Access Journals (Sweden)

    Rodrigo Arias Duque

    2005-01-01

    Full Text Available Desde el punto de vista farmacológico, es importante comprender qué es el alcohol y cómo actúa en el organismo. No existe una causa simple, sino una interacción complicada de factores neuroquímicos, fisiológicos, psicológicos y sociales que originan y desarrollan esta grave enfermedad fármaco-dependiente. La acción psicofisiológica y farmacodinámica del alcohol es fundamentalmente depresiva, por la reducción de la transmisión sináptica en el sistema nervioso humano. Es un hecho conocido que el consumo excesivo de alcohol causa una disfunción aguda y crónica del cerebro, produciendo trastornos en el sistema nervioso central, presentando alteraciones en la memoria y en las funciones intelectuales como cálculo, comprensión y aprendizaje. A nivel hepático tiene lugar, en su mayoría, el metabolismo del alcohol, produciéndose un hígado graso alcohólico, aumentando el tamaño, terminando en necrosis e inflamación grave del hígado; esto se llama hepatitis alcohólica, y si se sigue consumiendo alcohol se desarrollará la cirrosis. El alcohol también ha estado relacionado con alteraciones del miocardio; se ha constatado en animales de experimentación sanos que tanto la velocidad de contracción del músculo cardiaco y su máxima tensión disminuyen en presencia del alcohol, como consecuencia, la fuerza de cada contracción y el aumento de presión en el ventrículo izquierdo son menores, perdiendo eficacia el corazón como bomba.

  11. Quality improvement in emergency service delivery: Assessment of knowledge and skills amongst emergency nurses at Connaught Hospital, Sierra Leone

    Directory of Open Access Journals (Sweden)

    Hedda Bøe Nyhus

    2017-09-01

    Conclusion: This study has identified key aspects of emergency nursing speciality training to be developed through theoretical and skill-based education provided by the nursing schools and hospital clinical facilities in Sierra Leone.

  12. Order of 13 December 1985 on the transfer to ENRESA of the Radioactive Waste Management Facility at Sierra Albarrana

    International Nuclear Information System (INIS)

    1984-01-01

    This Order provides for the transfer of the Radioactive Waste Management Facility at Sierra Albarrana from the Junta de Energia Nuclear to ENRESA, the National Enterprise for Radioactive Waste; it also organises all stages of the transfer. (NEA) [fr

  13. The karst network system of the Sierra de las Nieves (Malaga, Spain). An example of a high relief Mediterranean karst

    Energy Technology Data Exchange (ETDEWEB)

    Pardo-Iguzquiza, E.; Duran, J. J.; Robledo-Ardila, P.; Luque-Espinar, J. A.; Martos-Rosillo, S.; Guardiola-Albert, C.; Pedrera, A.

    2016-07-01

    The aim of this work is the stochastic simulation of a network of karst conduits in a high relief karst system. The simulation completes the existing cave mapping provided by speleological exploration and connects the recharge area with the discharge at the karst springs. The Sierra de las Nieves karst system is a high relief Mediterranean karst that has allowed the development of a system of large conduits and caves. The system follows the typical pattern of an alpine karst system with two characteristic zones where the development of the caves is different. The first zone, with a mean altitude of 1 750 m a.s.l., the Hoyas del Pilar and Torrecilla, is the area with highest altitude where recharge takes place and where the entrance potholes to the system are located. In this zone the cave system has a development mainly along the vertical (with 1,000 m of vertical development along a few hundreds of metres of horizontal development) with large shafts and narrow and steep meanders, until the local base level is reached at 700 m a.s.l. In the second zone, the system has a quasi-horizontal development with 300 m of altitude difference for 7 km in the horizontal until the base level of the system at the Rio Grande Spring (450 m a.s.l.). The transition between both zones is dominated by the presence of sumps where the conduits have vertical ondulations. The connectivity between the entrance and the resurgence has been demonstrated, in the past, by tracer tests. The system of super caves has been made possible because of the favourable conjunction of lithological, structural, geomorphological, hydrogeological and climatic factors. Geomorphic indices are introduced to describe the three-dimensional karst networks so the known network can be completed (i.e. simulated), taking into account statistical and probabilistic criteria. The simulated system can be used for the mathematical flow simulation of the karst system. (Author)

  14. Demography of the California spotted owl in the Sierra National Forest and Sequoia/Kings Canyon National Parks

    Science.gov (United States)

    George N. Steger; Thomas E. Munton; Kenneth D. Johnson; Gary P. Eberlein

    2002-01-01

    Nine years (1990–1998) of demographic data on California spotted owls (Strix occidentalis occidentalis) in two study areas on the western slopes of the Sierra Nevada—one in the Sierra National Forest (SNF), the other in Sequoia/Kings Canyon National Parks (SNP)—are summarized. Numbers of territorial owls fluctuated from 85 to 50 in SNF and 80 to 58...

  15. Preliminary assessment of the moth (Lepidoptera: Heterocera) fauna of Rincon de Guadalupe, Sierra de Bacadehuachi, Sonora, Mexico

    Science.gov (United States)

    John D. Palting

    2013-01-01

    The Sierra de Bacadéhuachi is a poorly sampled extension of the Sierra Madre Occidental (SMO) located in east-central Sonora near the town of Bacadéhuachi. Sampling of moths using mercury vapor and ultraviolet lights occurred in summer and fall 2011, and spring 2012 at Rincón de Guadalupe, located in pine-oak forest at 1680 m elevation. Approximately 400 taxa of moths...

  16. Landsat-Derived Estimates of Mangrove Extents in the Sierra Leone Coastal Landscape Complex during 1990-2016.

    Science.gov (United States)

    Mondal, Pinki; Trzaska, Sylwia; de Sherbinin, Alex

    2017-12-21

    This study provides the first assessment of decadal changes in mangrove extents in Sierra Leone. While significant advances have been made in mangrove mapping using remote sensing, no study has documented long-term changes in mangrove extents in Sierra Leone-one of the most vulnerable countries in West Africa. Such understanding is critical for devising regional management strategies that can support local livelihoods. We utilize multi-date Landsat data and cloud computational techniques to quantify spatiotemporal changes in land cover, with focus on mangrove ecosystems, for 1990-2016 along the coast of Sierra Leone. We specifically focus on four estuaries-Scarcies, Sierra Leone, Yawri Bay, and Sherbro. We relied on the k-means approach for an unsupervised classification, and validated the classified map from 2016 using ground truth data collected from Sentinel-2 and high-resolution images and during field research (accuracy: 95%). Our findings indicate that the Scarcies river estuary witnessed the greatest mangrove loss since 1990 (45%), while the Sierra Leone river estuary experienced mangrove gain over the last 26 years (22%). Overall, the Sierra Leone coast lost 25% of its mangroves between 1990 and 2016, with the lowest coverage in 2000, during the period of civil war (1991-2002). However, natural mangrove dynamics, as supported by field observations, indicate the potential for regeneration and sustainability under carefully constructed management strategies.

  17. Evaluating potential overlap between pack stock and Sierra Nevada bighorn sheep (Ovis canadensis sierrae) in Sequoia and Kings Canyon National Parks, California

    Science.gov (United States)

    Klinger, Robert C.; Few, Alexandra P.; Knox, Kathleen A.; Hatfield, Brian E.; Clark, Jonathan; German, David W.; Stephenson, Thomas R.

    2015-01-01

    Pack stock (horses, mules, burros, llamas, and goats) are frequently assumed to have negative effects on public lands, but there is a general lack of data to be able to quantify the degree to which this is actually the case. Sequoia and Kings Canyon National Parks have received complaints that pack stock may affect Sierra Nevada bighorn sheep (Ovis canadensis sierrae; SNBS), a federally endangered subspecies that occurs in largely disjunct herds in the Sierra Nevada Range of California. The potential effects are thought to be displacement of SNBS from meadows on their summer range (altered habitat use) or, more indirectly, through changes in SNBS habitat or forage quality. Our goals were to conduct an association analysis to quantify the degree of potential spatial overlap in meadow use between SNBS and pack stock and to compare differences in vegetation community composition, structure, and diversity among meadows with different levels of use by bighorn sheep and pack stock. For the association analysis, we used two approaches: (1) we quantified the proportion of meadows that were within the herd home ranges of bighorn sheep and were potentially open to pack stock, and, (2) we used Monte Carlo simulations and use-availability analyses to compare the proportion of meadows used by bighorn sheep relative to the proportional occurrence or area of meadows available to bighorn sheep that were used by pack stock. To evaluate potential effects of pack stock on meadow plant communities and SNBS forage, we sampled vegetation in 2011 and 2012 at 100 plots to generate data that allowed us to compare:

  18. Long-lived Control of Sierras Pampeanas Ranges on Andean Foreland Basin Evolution Revealed by Coupled Low-temperature Thermochronology and Sedimentology

    Science.gov (United States)

    Stevens Goddard, A.; Carrapa, B.; Larrovere, M.; Aciar, R. H.

    2017-12-01

    The Sierras Pampeanas ranges of west-central Argentina (28º- 31ºS) are a classic example of thick-skinned style basement block uplifts. The style and timing of uplift in these mountain ranges has widely been attributed to the onset of flat-slab subduction in the middle to late Miocene. However, the majority of low-temperature thermochronometers in the Sierras Pampeanas have much older cooling dates. Thermal modeling derived from new low-temperature thermochronometers in Sierra de Velasco, one of the highest relief (> 4 km) mountains in the Sierras Pampeanas, suggest that the rocks in these ranges have been at near-surface temperatures (history of long-lived topography illustrated in Sierra de Velasco can be expanded to other ranges in the Sierras Pampeanas by integrating multiple data sets.

  19. Culturas del Mundo

    DEFF Research Database (Denmark)

    Benwell, Ann Fenger; Costa, Alberto; Waehle, Espen

    2006-01-01

    ’Culturas del mundo. Colecciones del Museo Nacional de Dinamarca’ with Ann Fenger Benwell in Culturas del Mundo. Colecciones del Museo Nacional de Dinamarca, ed. Silvia Sauquet, Fundación "la Caixa", Barcelona 2006, pp. 31-39......’Culturas del mundo. Colecciones del Museo Nacional de Dinamarca’ with Ann Fenger Benwell in Culturas del Mundo. Colecciones del Museo Nacional de Dinamarca, ed. Silvia Sauquet, Fundación "la Caixa", Barcelona 2006, pp. 31-39...

  20. SRTM Anaglyph: Corral de Piedra, Argentina

    Science.gov (United States)

    2001-01-01

    Volcanism and erosion are prominently seen in this view of the eastern flank of the Andes Mountains taken by Shuttle Radar Topography Mission (SRTM). The area is southeast of San Martin de Los Andes, Argentina. Eroded peaks up to 2,210-meter-high (7,260-foot) are seen on the west (left), but much of the scene consists of lava plateaus that slope gently eastward. These lava flows were most likely derived from volcanic sources in the high mountains. However, younger and more localized volcanic activity is evident in the topographic data as a cone surrounding oval-shaped flow near the center of the scene.The plateaus are extensively eroded by the Rio Limay (bottom of the image) and the Rio Collon Cura and its tributaries (upper half). The larger stream channels have reached a stable level and are now cutting broad valleys. Few terraces between the levels of the high plateaus and lower valleys (bottom center and upper right of the volcanic cone) indicate that stream erosion had once temporarily reached a higher stable level before eroding down to its current level. In general, depositional surfaces like lava flows are progressively younger with increasing elevation, while erosional surfaces are progressively younger with decreasing elevation.This anaglyph was produced by first shading a preliminary SRTM elevation model. The stereoscopic effect was then created by generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between the National Aeronautics and Space Administration (NASA), the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense, and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise, Washington, DC.Size: 57.6 x 40.5 kilometers (35.7 x 25.1 miles) Location: 40.4 deg. South lat., 70.8 deg. West lon. Orientation: North toward the top Image Data: Shaded SRTM elevation model Date Acquired: February 2000

  1. Evolución paleogeográfica de la depresión de Elche-Cuenca del Bajo Segura (España durante el pleistoceno

    Directory of Open Access Journals (Sweden)

    Dabrio, C. J.

    1990-08-01

    Full Text Available The Elche Basin-Lower Segura Bains is located in the eastern end of the Betic Cordillera at the northern end of the La Depresión de Elche-Cuenca del Bajo Segura se sitúa en la Cordillera Bética, en el extremo septentrional del «corredor de desgarre sinistra» definido por Montenat et., al. (1987. El análisis geomorfológico y sedimentológico de este área demuestra que la configuración actual de este sector costero está íntimamente ligada a la actividad neotectónica del tramo final del «corredor» a lo largo del Cuaternario. Durante el Plioceno Superior el mar ocupaba una amplia extensión que llegaba hasta el pie de los relieves de la Sierra de Crevillente, Macizo del Segura, Sierra de Carrascoy y Sierra de Cartagena. En la plataforma somera se depositaron las calcarenitas amarillas fosilíferas con sentido de progradación hacia el sureste. Durante el Pleistoceno Inferior la elevación de los macizos antes citados provocó una regresión generalizada que hizo situarse a la línea de costa mucho más próxima a la posición actual. Testigo de este límite marino son las facies mixtas de islas barrera-Iagoon que hoy en día observamos en la Sierra del Molar, Sierra del Moncayo, Rojales, Puerto de San Pedro, etc., y que se han denominado «Unidad de transición Moncayo-EI Molar» (Somoza, 1989; Goy et. al., 1989 a. Dentro de esta Unidad el sentido de progradación se mantiene hacia el sureste. La elevación de los relieves circundantes favoreció también la formación de abanicos aluviales cuyas facies distales se sitúan encima de la «Unidad de Transición» en el área de El Molar, el Moncayo y la Sierra de Columbares. La reactivación del tramo final del «corredor de desgarre» durante el Pleistoceno Inferior- Medio como consecuencia de la unión del accidente de Palomares-Alhama y el de Vélez Rubio, junto con el rejuego de los accidentes N 120-130" E, lleva consigo un cambio paleogeográfico brusco en toda

  2. Distribución espacial y temporal de larvas de Trichoptera (Insecta en el río Manzanares, Sierra Nevada de Santa Marta (Colombia

    Directory of Open Access Journals (Sweden)

    Daniel José Serna M

    2015-06-01

    Full Text Available Los insectos acuáticos son importantes como indicadores de calidad de aguas en ríos y arroyos. Uno de los grupos más abundantes son los Thichoptera, ellos juegan un papel importante por su papel funcional en los sistemas acuáticos. Por eso conocer su diversidad es prioritario. El objetivo de este estudio es conocer la estructura de la comunidad del orden Trichoptera y su dinámica espacio-temporal en relación con los microhábitats y algunas variables físicas y químicas, en la parte media y baja de la cuenca del río Manzanares (Sierra Nevada de Santa Marta, Colombia. Se muestrearon mensualmente ocho microhábitats entre agosto 2002 y febrero 2003, durante los periodos de lluvias y sequía. Se recolectaron 3 316 larvas, repartidas en tres subórdenes pertenecientes a 10 familias y 14 géneros; seis de estos géneros y una familia son los primeros registros para el departamento del Magdalena (Colombia. Los tricópteros presentaron la mayor abundancia y riqueza genérica en los microhábitats Hojarasca Corriente Lenta, Hojarasca Corriente Rápida y Piedra Corriente Rápida, donde Nectopsyche (28%, Leptonema (17% y Smicridea (15% fueron los géneros más predominantes. La estructura, y composición de los géneros del orden Trichoptera variaron en cada estación en función del régimen pluviométrico y las variables físicas y químicas presentadas en la localidad de estudio, evidenciando las menores abundancias y riqueza en los periodos de altas precipitaciones (octubre y noviembre y las mayores en épocas de precipitaciones bajas (diciembre, enero y febrero. De igual forma las estaciones con mayores valores de oxígeno disuelto y menores valores en temperatura y conductividad reportaron las mayores abundancias de tricópteros. Los tricópteros evidenciaron preferencias por microhábitats específicos, variación en su composición de acuerdo con los periodos climáticos y respuesta a los niveles de polución del río. Se recomienda

  3. Climate controls on forest productivity along the climate gradient of the western Sierra Nevada

    Science.gov (United States)

    Kelly, A. E.; Goulden, M. L.

    2010-12-01

    The broad climate gradient of the slopes of the western Sierra Nevada mountains supports ecosystems spanning extremes of productivity, biomass, and function. We are using this natural environmental gradient to understand how climate controls NPP, aboveground biomass, species' range limits, and phenology. Our experimental approach combines eddy covariance, sap flow, dendrometer, and litterfall measurements in combination with soil and hydrological data from the Southern Sierra Critical Zone Observatory (SSCZO). We have found that above about 2500 m, forest productivity is limited by winter cold, while below 1200 m, productivity is likely limited by summer drought. The sweet spot between these elevations has a nearly year-long growing season despite a snowpack that persists for as long as six months. Our results show that small differences in temperature can markedly alter the water balance and productivity of mixed conifer forests.

  4. Innovation diffusion and development in a Third World setting: the cooperative movement in Sierra Leone

    Energy Technology Data Exchange (ETDEWEB)

    Brown, L.A. (Ohio State Univ., Columbus); Schneider, R.; Harvey, M.E.; Riddell, J.B.

    1979-09-01

    The interface between innovation diffusion and economic development and social change in Third World settings is investigated. The paper first presents a conceptual framework linking diffusion processes and development and then exemplifies a portion of that framework by examining the diffusion of agricultural cooperatives in Sierra Leone from 1948 through 1967. Attention is then turned to elements of the historical development of a cooperative movement in Sierra Leone which are important for understanding the processes underlying that diffusion. The temporal and spatial patterns of diffusion are discussed and the statistical analyses that assess (1) which variables provide a basis for distinguishing political units with cooperatives from those without, and (2) which variables account for the differences in the time at which cooperatives were established are examined. The findings are integrated with the theory presented. 41 references.

  5. Thymus × pseudogranatensis (Labiatae, nuevo híbrido para Sierra Nevada (España

    Directory of Open Access Journals (Sweden)

    Lorite, Juan

    2011-12-01

    Full Text Available Thymus × pseudogranatensis Vizoso, F.B. Navarro & Lorite, a new spontaneous hybrid of Th. granatensis Boiss. subsp. granatensis and Th. zygis L. subsp. gracilis (Boiss. R. Morales, collected in the dolomitic areas of Sierra Nevada (SE Spain, is described. Morphological characters of the new nothospecies are analysed and its distribution and ecology are discussed.Se describe Thymus × pseudogranatensis Vizoso, F.B. Navarro & Lorite, un nuevo híbrido entre Th. granatensis Boiss. subsp. granatensis y Th. zygis L. subsp. gracilis (Boiss. R. Morales, colectado en la orla dolomítica de Sierra Nevada (SE de España. Se analizan los caracteres morfológicos de la nueva notoespecie y se aportan detalles sobre su hábitat y distribución.

  6. Late Quaternary offset of alluvial fan surfaces along the Central Sierra Madre Fault, southern California

    Science.gov (United States)

    Burgette, Reed J.; Hanson, Austin; Scharer, Katherine M.; Midttun, Nikolas

    2016-01-01

    The Sierra Madre Fault is a reverse fault system along the southern flank of the San Gabriel Mountains near Los Angeles, California. This study focuses on the Central Sierra Madre Fault (CSMF) in an effort to provide numeric dating on surfaces with ages previously estimated from soil development alone. We have refined previous geomorphic mapping conducted in the western portion of the CSMF near Pasadena, CA, with the aid of new lidar data. This progress report focuses on our geochronology strategy employed in collecting samples and interpreting data to determine a robust suite of terrace surface ages. Sample sites for terrestrial cosmogenic nuclide and luminescence dating techniques were selected to be redundant and to be validated through relative geomorphic relationships between inset terrace levels. Additional sample sites were selected to evaluate the post-abandonment histories of terrace surfaces. We will combine lidar-derived displacement data with surface ages to estimate slip rates for the CSMF.

  7. Geology and petrography of the Socoscora Sierra . Province of San Luis. Republica Argentina

    International Nuclear Information System (INIS)

    Carugno Duran, A.

    1998-01-01

    The following paper include an study geological and petrographic of the Sierra de Socoscora. San Luis, Argentina. This mountainas is a block with less elevation that the Sierra de San Luis, and it located in the west center of it. It' s formed by an crystalline basement composed by metamorphic haigh grade rocks, with a penetrative foliation of strike N-S. in this context is possible to define petrographicly the following units, migmatitic that fill a big part of the mountain, amphibolites, marbles, skarns, milonites and pegmatites. This units have amphibolitic facies assemblanges mineral and in some them, we can observe retrograde metamorphism of the greesnschist facies. The metamorphic structure is complex and evidence at least three deformation event

  8. Crop-Specific EU Aid and Smallholder Food Security in Sierra Leone

    Directory of Open Access Journals (Sweden)

    Silvia L. Saravia-Matus

    2016-11-01

    Full Text Available The article analyses the viability of promoting crop-specific programs as a mean to improve smallholder net farm income and food security. The case study explores the relevance of European Union Stabilisation of Export Earnings (STABEX funds in supporting Sierra Leone’s agricultural development agenda. By analysing the drivers of food security for a number of targeted smallholders in the two most important agricultural zones of Sierra Leone, it is possible to compare the suitability of crop-specific support (in rice, cocoa and coffee versus general aid programs (public infrastructure, on and off farm diversification opportunities, sustainable practices, access to productive assets, etc.. The results indicate that crop diversification strategies are widespread and closely related to risk minimisation and enhanced food security among smallholders. Similarly, crop-specific programs mainly focusing on commercialisation tend to overlook important constraints associated to self-consumption and productivity.

  9. Anfibios de las Sierras Pampeanas Centrales de Argentina: diversidad y distribución altitudinal

    Directory of Open Access Journals (Sweden)

    Julián N. Lescano

    2015-09-01

    Full Text Available Amphibians from Sierras Pampeanas Centrales of Argentina: diversity and altitudinal distribution. Sierras Pampeanas Centrales (SPC mountains are located in Córdoba and San Luis provinces (Argentina and represent an area of unique biogeographic importance. In this paper we provide a synthesis about the knowledge of diversity and altitudinal distribution of anurans that inhabit SPC mountains. We compiled a species list through different information sources (field data, biological collections and bibliography. Using this information we characterize altitudinal distribution range of each species and analyze associations between species richness and composition and altitude gradient. We recorded 24 amphibians species belonging to five families. These species are heterogeneously distributed over the altitude gradient of SPC. We detect a linear negative relationship between altitude and species richness and defined assemblages associated with different altitude sectors. The results obtained in the paper represent basic information that will be useful to evaluate anthropogenic impact on this particular and fragile mountain system.

  10. Estudio de un brote epidémico de fiebre amarilla selvática en el pie de monte de La Sierra Nevada de Santa Marta, 1979

    Directory of Open Access Journals (Sweden)

    Hernando Vidales

    1981-12-01

    Full Text Available En 1979 se observó en Colombia una epidemia de fiebre amarilla selvática, en las estribaciones más bajas de la Sierra Nevada de Santa Marta, donde nunca antes se había registrado la enfermedad. Los casos ocurrieron en las cercanías de las ciudades de Valledupar y Santa Marta, por entonces infestadas con Aedes aegypti .Veinte de ellos fueron confirmados por examen histopatológico de hígado o por aislamiento de virus y en otros 36 se hizo un diagnóstico de presunción, con base en estudios clínicos, epidemiológicos y serológicos. Entre los primeros hubo 14 defunciones y entre los segundos 13. En las localidades urbanas del Brea se llevaron a cabo intensas campañas de lucha contra el A. aegyptiy de vacunación. No se registraron casos urbanos de la enfermedad. Los enfermos se infectaron en bosques estrechos de galería y en cafetales. donde previa y paralelamente se observó mortalidad en monos í Alouatta seniculus. El reconocimiento entomológico mostró en la región la presencia de 3 especies de Haemagogus, entre ellas H. janthinomys Con 745 mosquitos se hicieron 192 mezclas para intentar aislamiento de virus, habiéndose obtenido sólo uno positivo para fiebre amarilla, a partir de H. janthinomys. La epidemia descrita es un ejemplo mBs de la invasión del virus amarílico a nuevos "habitats" rurales,  con la consiguiente amenaza para las ciudades vecinas infestadas con A. aegypti, el riesgo de la urbanización del virus, lo cual exige la adopción inmediata de medidas para abatir el mosquito y para vacunar a la población expuesta.

  11. Aporte a la geología del Alto de Mogna, al norte de la depresión del Tulum, provincia de San Juan

    OpenAIRE

    J.J. Zambrano; G. Suvires

    2005-01-01

    El Alto de Mogna, elevación estructural situada en la parte central de la provincia de San Juan, entre las provincias geológicas de las Sierras Pampeanas y la Precordillera Oriental, tiene rumbo este-oeste, transversal a las estructuras de las mencionadas cadenas montañosas, y separa dos depresiones tectónicas regionales: el valle del Bermejo, al norte, y la depresión de Tulum, al sur. En esta elevación estructural afloran fallas y pliegues, cuyo rumbo es prácticamente este-oeste, salvo en la...

  12. GPS Imaging of vertical land motion in California and Nevada: Implications for Sierra Nevada uplift

    Science.gov (United States)

    Blewitt, Geoffrey; Kreemer, Corné

    2016-01-01

    Abstract We introduce Global Positioning System (GPS) Imaging, a new technique for robust estimation of the vertical velocity field of the Earth's surface, and apply it to the Sierra Nevada Mountain range in the western United States. Starting with vertical position time series from Global Positioning System (GPS) stations, we first estimate vertical velocities using the MIDAS robust trend estimator, which is insensitive to undocumented steps, outliers, seasonality, and heteroscedasticity. Using the Delaunay triangulation of station locations, we then apply a weighted median spatial filter to remove velocity outliers and enhance signals common to multiple stations. Finally, we interpolate the data using weighted median estimation on a grid. The resulting velocity field is temporally and spatially robust and edges in the field remain sharp. Results from data spanning 5–20 years show that the Sierra Nevada is the most rapid and extensive uplift feature in the western United States, rising up to 2 mm/yr along most of the range. The uplift is juxtaposed against domains of subsidence attributable to groundwater withdrawal in California's Central Valley. The uplift boundary is consistently stationary, although uplift is faster over the 2011–2016 period of drought. Uplift patterns are consistent with groundwater extraction and concomitant elastic bedrock uplift, plus slower background tectonic uplift. A discontinuity in the velocity field across the southeastern edge of the Sierra Nevada reveals a contrast in lithospheric strength, suggesting a relationship between late Cenozoic uplift of the southern Sierra Nevada and evolution of the southern Walker Lane. PMID:27917328

  13. Measuring work engagement among community health workers in Sierra Leone: Validating the Utrecht Work Engagement Scale

    OpenAIRE

    Vallières, Frédérique; McAuliffe, Eilish; Hyland, Philip; Galligan, Marie; Ghee, Annette

    2017-01-01

    This study examines the concept of volunteer work engagement in a sample of 334 community health workers in Bonthe District, Sierra Leone. Structural equation modelling was used to validate both the 9-item and the 17-item Utrecht Work Engagement Scale (UWES-9 and UWES-17, respectively). Results assessing the UWES-17 invalidated the three-factor structure within this cohort of community health workers, as high correlations were found between latent factors. Findings for the validity of the UWE...

  14. Evaluating the PV potential of Miraflores de la Sierra (Madrid) via geographic information technologies

    International Nuclear Information System (INIS)

    Martín Ávila, A.M.; Domínguez Bravo, J.; Amador Guerra, J.

    2016-01-01

    The study of the PV potential in Miraflores de la Sierra forms part of the development of strategies to promote renewables-based distributed generation. The importance of residents and their urban environment in the change of energy model is taking on a new role, as both consumer and energy producer. Facilitating this transition towards a new model, demonstrating the huge possibilities of this new agent, is one of the basic objectives of this article. (Author)

  15. Hydrologic response and watershed sensitivity to climate warming in California's Sierra Nevada.

    Directory of Open Access Journals (Sweden)

    Sarah E Null

    Full Text Available This study focuses on the differential hydrologic response of individual watersheds to climate warming within the Sierra Nevada mountain region of California. We describe climate warming models for 15 west-slope Sierra Nevada watersheds in California under unimpaired conditions using WEAP21, a weekly one-dimensional rainfall-runoff model. Incremental climate warming alternatives increase air temperature uniformly by 2 degrees, 4 degrees, and 6 degrees C, but leave other climatic variables unchanged from observed values. Results are analyzed for changes in mean annual flow, peak runoff timing, and duration of low flow conditions to highlight which watersheds are most resilient to climate warming within a region, and how individual watersheds may be affected by changes to runoff quantity and timing. Results are compared with current water resources development and ecosystem services in each watershed to gain insight into how regional climate warming may affect water supply, hydropower generation, and montane ecosystems. Overall, watersheds in the northern Sierra Nevada are most vulnerable to decreased mean annual flow, southern-central watersheds are most susceptible to runoff timing changes, and the central portion of the range is most affected by longer periods with low flow conditions. Modeling results suggest the American and Mokelumne Rivers are most vulnerable to all three metrics, and the Kern River is the most resilient, in part from the high elevations of the watershed. Our research seeks to bridge information gaps between climate change modeling and regional management planning, helping to incorporate climate change into the development of regional adaptation strategies for Sierra Nevada watersheds.

  16. Dataset of Phenology of Mediterranean high-mountain meadows flora (Sierra Nevada, Spain)

    OpenAIRE

    Antonio Jesús Pérez-Luque; Cristina Patricia Sánchez-Rojas; Regino Zamora; Ramón Pérez-Pérez; Francisco Javier Bonet

    2015-01-01

    Abstract Sierra Nevada mountain range (southern Spain) hosts a high number of endemic plant species, being one of the most important biodiversity hotspots in the Mediterranean basin. The high-mountain meadow ecosystems (borreguiles) harbour a large number of endemic and threatened plant species. In this data paper, we describe a dataset of the flora inhabiting this threatened ecosystem in this Mediterranean mountain. The dataset includes occurrence data for flora collected in those ecosystems...

  17. Correlations and Areal Distribution of the Table Mountain Formation, Stanislaus Group; Central Sierra Nevada, California

    Science.gov (United States)

    Torrez, G.; Carlson, C. W.; Putirka, K. D.; Pluhar, C. J.; Sharma, R. K.

    2011-12-01

    Late Cenozoic evolution of the western Cordillera is a matter of ongoing debate in geologic studies. Volcanic deposits within, and adjacent to the Sierra Nevada have played a significant role in many of these debates. With local faulting coincident with eruption of members of the Stanislaus Group at ca. 38°N, the composition and correlation of these volcanics can greatly aid our understanding of Sierra Nevada tectonics. At the crest of the central Sierra Nevada, 23 trachyandesite lava flows of the Table Mountain Formation, dated at ~10 Ma, cap Sonora Peak. These 23 flows compose the thickest and most complete known stratigraphic section of the Table Mountain Formation in the region. Located ~12 km east of Sonora Peak are 16 flows of trachyandesite at Grouse Meadow. We have collected a detailed set of geochemical and paleomagnetic data for flows of these two sections at Sonora Peak and Grouse Meadows in an attempt to correlate volcanic, paleomagnetic and structural events related to uplift and extension in the Sierra Nevada and the Walker Lane. Correlation of individual flows is possible based on: stratigraphic order, temporal gaps in deposition as determined by paleomagnetic remanence direction and nonconformities, and flow geochemistry. These correlations allow us to infer source localities, flow directions, and temporal changes in flow routes. The large number of flows present at Grouse Meadow provides an additional data set from which to correlate various localities in the region to those units not represented at Sonora Peak. Several flows which occur in the upper portions of the Sonora Peak and Grouse Meadow stratigraphic sections do not correlate between these localities. The causes of stratigraphic discontinuity potentially represent: tectonic isolation across the Sierran Crest, topographic isolation by the emplacement of younger flows, or the combination of the two. Additional to the correlation of individual flows at these localities, this study shows a

  18. Inversion for Eigenvalues and Modes Using Sierra-SD and ROL.

    Energy Technology Data Exchange (ETDEWEB)

    Walsh, Timothy [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Aquino, Wilkins [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Ridzal, Denis [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Kouri, Drew Philip [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-12-01

    In this report we formulate eigenvalue-based methods for model calibration using a PDE-constrained optimization framework. We derive the abstract optimization operators from first principles and implement these methods using Sierra-SD and the Rapid Optimization Library (ROL). To demon- strate this approach, we use experimental measurements and an inverse solution to compute the joint and elastic foam properties of a low-fidelity unit (LFU) model.

  19. Distance, accessibility and costs. Decision-making during childbirth in rural Sierra Leone: A qualitative study.

    Directory of Open Access Journals (Sweden)

    Laura Treacy

    Full Text Available Sierra Leone has one of the highest maternal mortality ratios in the world. Efforts to reduce maternal mortality have included initiatives to encourage more women to deliver at health facilities. Despite the introduction of the free health care initiative for pregnant women, many women still continue to deliver at home, with few having access to a skilled birth attendant. In addition, inequalities between rural and urban areas in accessing and utilising health facilities persist. Further insight into how and why women make decisions around childbirth will help guide future plans and initiatives in improving maternal health in Sierra Leone. The objective of this study was to explore the perceptions and decision-making processes of women and their communities during childbirth in rural Sierra Leone.Data were collected through seven focus group discussions and 22 in-depth interviews with recently pregnant women and their community members in two rural villages. Data were analysed using systematic text condensation. Findings revealed that decision-making processes during childbirth are dynamic, intricate and need to be understood within the broader social context that they take place. Factors such as distance and lack of transport, perceived negative behaviour of hospital staff, direct and indirect financial obstacles, as well as the position of women in society all interact and influence how and what decisions are made.Pregnant women face multiple interacting vulnerabilities that influence their healthcare-seeking decisions during pregnancy and childbirth. Future initiatives to improve access and utilisation of safe healthcare services for pregnant women need to be based on adequate knowledge of structural constraints and health inequities that affect women in rural Sierra Leone.

  20. Medium and large mammals in the Sierra La Madera, Sonora, Mexico

    Science.gov (United States)

    Erick Oswaldo Bermudez-Enriquez; Rosa Elena Jimenez-Maldonado; Gertrudis Yanes-Arvayo; Maria de la Paz Montanez-Armenta; Hugo Silva-Kurumiya

    2013-01-01

    Sierra La Madera is a Sky Island mountain range in the Madrean Archipelago. It is in Fracción V of the Ajos-Bavispe CONANP Reserve in the Municipios (= Counties) of Cumpas, Granados, Huásabas, Moctezuma, and Villa Hidalgo. Medium and large mammals were inventoried using camera traps. Eighteen Wild View 2® camera traps were deployed during four sampling periods: August...