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Sample records for dar sus tejidos

  1. Viabilidad Celular in Vitro de tejido renal neonatal postmortem: Sus aplicaciones futuras.

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    Alvaro Dueñas L.

    2001-04-01

    Full Text Available

    La importancia de los cultivos celulares humanos continúa expandiéndose, en especial en el campo de la bioingeniería de tejidos. Con el fin de establecer mejores criterios de selección en la obtención de tejido renal postmortem, se estudiaron 111 neonatos de < 3 días de edad, fallecidos en la sala de Cuidados Intensivos del Recién Nacido (CIRENA y 22 mortinatos de la sala de partos del Hospital Universitario del Valle (HUV en Cali, Colombia, entre enero 1 y diciembre 31 de 1995. Se consideraron los antecedentes maternos y fetales, en busca de variables que determinen una mejor viabilidad celular renal postmortem (VCRP. Además, se hizo un estudio del estado microbiológico de los neonatos postmortem y de los mortinatos mediante el examen de sangre y células para conocer la incidencia en estos de infecciones bacterianas y virales.

    De los 133 casos estudiados, 115 (86% fueron de bajo peso al nacer (BPN, vgr. 500 a 2,500 gramos y los 18 (14% restantes fueron de peso adecuado al nacer (PAN >2,500 gramos. De 13 clases de diagnóstico registrados como antecedentes maternos, los seis más frecuentes fueron: ruptura prematura de membranas (RPM – 20%, PRE-eclampsia/eclampsia (PE – 13%, corioamnionitis (CA – 11%, infección urinaria (IU – 11%, placenta previa (PP – 9% y vaginitis (V – 8%. De los ocho diagnósticos registrados en los neonatos, los dos más frecuentes fueron el síndrome de dificultad respiratoria (SDR y la enfermedad de membrana hialina (ME -73%.

    Se pudo observar que la VCRP total fue de 65%, siendo mayor en los casos con BPN (69% que en los de PAN (39%. Independientemente de los antecedentes maternos se observó una VCRP de 70% y 77% en los casos con diagnóstico de SDR y EMH, respectivamente. Por otra parte, se obtuvo la mayor VCRP en los casos con diagnóstico materno de PP (83%. Aunque por el bajo número de casos expuestos en el presente estudio estas diferencias no demostraron significancia estad

  2. Introducción al estudio de los tejidos vegetales

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    Durfort i Coll, Mercè

    2006-01-01

    Se comenta una selección de imágenes de los principales tejidos animales, desde el epitelial y sus diferentes modalidades, a los tejidos de la serie del conjuntivo, la sangre, la musculatura y el tejido nervioso, habiendo escogido para hacer esta revisión los órganos más representativos.

  3. Introducción al estudio de los tejidos animales

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    Durfort i Coll, Mercè

    2006-01-01

    Se comenta una selección de imágenes de los principales tejidos animales, desde el epitelial y sus diferentes modalidades, a los tejidos de la serie del conjuntivo, la sangre, la musculatura y el tejido nervioso, habiendo escogido para hacer esta revisión los órganos más representativos.

  4. CULTIVO DE TEJIDO CARTILAGINOSO ARTICULAR: ACERCAMIENTO CONCEPTUAL

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    Natalia María Zapata

    2007-12-01

    Full Text Available Con los métodos disponibles en el momento para la reconstrucción de tejidos, la reparación de defectos del tejido cartilaginoso no ha sido alcanzada completamente. Por esta razón, se ha recurrido a la ingeniería de tejidos, que busca el desarrollo de estrategias para obtener sustitutos funcionales de tejido cartilaginoso, con el fin de ofrecer soluciones terapéuticas a pacientes con pérdida o falla de este tipo de tejido. En el presente estudio se hace una breve revisión de la anatomía, histología, fisiología y patología del tejido cartilaginoso y de las terapias usuales para su reparación, además de dar a conocer el papel cumplido por la ingeniería de tejidos y los biomateriales en el desarrollo de soluciones terapéuticas en este campo.The currently available methods for tissue repair have not been able to restore completely functional cartilage tissue. For this reason, tissue engineering has developed strategies for fabricating cartilage substitutes in order to offer therapeutic solutions to patients that could suffer from any kind of cartilage disease. The purpose of this article was to review the anatomy, histology, physiology, pathology of cartilage, and the therapies commonly used for repairing this tissue. This article also shows the role established by tissue engineering and biomaterials in this field.

  5. Los dioses de los tejidos de Paracas (Perú)

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    Castro Paredes, Celia

    2017-01-01

    La cultura de Paracas, tiene un papel central en la prehistoria andina. Su importancia se puede deducir de los ricos ajuares de sus múltiples fardos funerarios. En estos se han encontrado múltiples y maravillosos mantos, junto a otros objetos que acompañaban a las momias de los difuntos principales. Sin embargo, hay cuestiones todavía no bien conocidas, como su origen y final, y sobre todo el papel de los excepcionales tejidos, cuyos dibujos y figuras son un enigma que podría relacionarse o i...

  6. Del tejido urbano al tejido social: análisis de las propiedades morfológicas y funcionales

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    Mariano Ferretti Ramos

    2012-01-01

    Full Text Available Existe en la actualidad una cantidad significativa de áreas intervenidas en la ciudad de León, destinadas a vivienda de interés social en las que se puede verificar la ausencia de espacios que permitan una mejor y más eficiente relación de comunidad no solo dentro de sí sino en sus puntos de contacto con el entorno circundante. Por otra parte, el crecimiento desmedido de la mancha urbana y una falta de planificación y control en los modelos de crecimiento han provocado una sistemática fr agmentación del espacio público en la ciudad. Esta rotura en el tejido físico, implica también un deterioro en su tejido social si entendemos que el soporte de las relaciones que nutren y dan existencia a la vida comunitaria en las ciud a des, son los espac ios de convivencia, de cruce de las diferentes realidades que hacen que una comunidad con sus caracteres se exprese como tal. Son lugares de soporte de nuestra cotide a neidad y que aseguran también otras propiedades vitales como la seguridad, la pertenencia y la identidad. Las repercusiones que esta problemática tiene en la calidad de vida de sus hab i tantes es una realidad que es necesario conocer desde el estudio de sus síntomas e interpreta r los para poder proponer posibles soluciones. Hablar del concepto d e “tejido” es, en sí mismo, una toma de posición en el abordaje de los problemas que aquejan a muchas ciudades latinoamericanas. Es la escala necesaria a tener en cuenta cuando se pretende realizar un análisis sobre aspectos más generales como el de segreg ación e s pacial, fragmentación física, expansión urbana o dispersión. El tejido urbano, el entramado físico producto de la acumulación en el tiempo de las realid a des sociales entre grupos y de ellos con el territorio; es sobre todo el grano de definición n e cesario para comprender las otras realidades mayores pero también es la huella digital del mayor o menor grado de salubridad del tejido social que sostiene la

  7. LA HIDROXIAPATITA, SU IMPORTANCIA EN LOS TEJIDOS MINERALIZADOS Y SU APLICACIÓN BIOMÉDICA

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    Margarita Victoria García-Garduño; José Reyes-Gasga

    2006-01-01

    La hidroxiapatita en los tejidos mineralizados reviste una gran importancia ya que se ha demostrado que es un material biocompatible, con aplicación biomédica en Odontología, Ortopedia y Cirugía Máxilofacial. Es el cristal principal de huesos y dientes ya que les confiere su dureza característica y, acompañado por la colágena, los huesos presentan determinada elasticidad. En la naturaleza se le encuentra formando parte de rocas metamórficas. En los tejidos vivos, la hidroxiapatita y sus precu...

  8. El tejido adiposo: algo más que un reservorio de energía

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    Sanhueza C, Julio

    2009-12-01

    adiposo blanco adquiera característica de pardo. Este trabajo revisa las principales características estructurales y funcionales del tejido adiposo blanco y pardo, con énfasis en sus funciones reguladoras y endocrinas.

  9. Nevos de tejido conectivo Connective tissue nevi

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    RE Achenbach

    Full Text Available Comunicamos dos casos de nevo del tejido conectivo, el primero con patrón histológico mixto y el segundo con predominio de alteraciones en las fibras elásticas. No se constataron síndromes ni patología sistémica asociada. Un caso presentó disposición linear y un nevo acrómico asociado.Two cases of connective tissue nevi are reported, one of them with a mixed histopatologic pattern and one with elastin fibers diminished. None of the patients had systemic involvement or associated syndromes. The mixed connective tissue nevi type showed a linear distribution and has associated an acromic nevi.

  10. Aplicaciones clínicas de las células madre del tejido adiposo

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    B. Castro

    2013-12-01

    Full Text Available En la actualidad, las células madre del tejido adiposo (ASC juegan un papel crucial en las estrategias de reparación o regeneración tisular. Son células mesenquimales multipotenciales que se pueden obtener fácilmente de lipoaspirados. Tras un proceso de digestión enzimática y centrifugación, se recoge la fracción estromal vacular (SVF en el sedimento obtenido y se purifican las ASC a través del cultivo en plástico y realización de varios subcultivos. Hay diversos aspectos que han convertido a las ASC en una importante opción en terapia celular en los últimos años: su seguridad demostrada en ensayos clínicos; la mayor cantidad de células mesenquimales que se obtienen del tejido adiposo con respecto a la médula ósea, con un proceso menos invasivo y con menor morbilidad; su carácter inmunorregulador, bien a través de la secreción de mediadores moleculares o interacción directa; y finalmente, su gran acción trófica con el objetivo de crear un microambiente adecuado para activar los procesos de reparación del propio tejido. En este trabajo también se indican las dosis celulares y las vías de administración que se están utilizando para la aplicación de las ASC y la SVF. Los próximos años serán cruciales para determinar, gracias a distintos ensayos clínicos en marcha, el potencial terapéutico de las ASC y sus mecanismos de acción.

  11. La Adiponectina, una adipocina del tejido adiposo clave en la obesidad durante la adolescencia

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    Gerardo Fernando Fernández Soto

    2016-12-01

    Full Text Available La obesidad Infantil es una epidemia mundial que simultáneamente con la diabetes tipo 2 se han incrementado en la población pediátrica, que representa alto impacto económico en la asistencia y el tratamiento de sus comorbilidades asociadas, para los distintos sistemas de salud, que han impulsados nuevas investigaciones relacionadas con la obesidad y, particularmente con un actualizado análisis de la biología del tejido adiposo. Uno de los resultados de esta actividad investigadora ha sido el mejor conocimiento de la importante actividad endocrina del tejido adiposo, ejercida por medio de la síntesis y secreción de una gran cantidad de hormonas, factores tisulares y citocinas, denominadas adipocinas que están implicadas en la regulación de varios procesos metabólicos fisiológicos. La adiponectina es una adipocina considerada un biomarcador bioquímico y antiinflamatorio en los trastornos metabólicos, ya que tiene un efecto sensibilizador de insulina, aumentando la oxidación de ácidos grasos y juega papel importante en minimizar el estrés oxidativo, que disminuye el desarrollo de trastornos metabólicos como la diabetes y la obesidad.

  12. Cáncer injertado en tejido mamario aberrante

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    Lidia Torres Ajá

    2012-02-01

    Full Text Available Entre las anomalías del desarrollo embrionario de las mamas se encuentran las mamas supernumerarias y el tejido ectópico aberrante. Ambas pueden ser asiento de tumores malignos de la mama, en mayor número  el tejido aberrante. Se presenta el caso de una paciente femenina de 73 años, que refiere tiene desde siempre una “mamita pequeña en el surco submamario izquierdo la cual nunca le ocasiono molestias hasta hace 2 meses en que aumentó de volumen y se le retrajo la piel". Mediante biopsia escisional se le diagnostica un carcinoma ductal infiltrante, siendo así  el primer caso de carcinoma injertado en tejido mamario aberrante diagnosticado en nuestra provincia.

  13. La Eutonía-Sus Principios

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    Rovella, Adriana

    2008-01-01

    El presente trabajo pretende dar cuenta de la Eutonía como práctica corporal dando cuenta de sus objetivos y principios La Eutonía fue creada por Gerda Alexander.El término, del griego, Eu: bueno, óptimo-Tonus: tensión; expresa la idea de una tonicidad armoniosamente equilibrada en adaptación constante al estado o actividad del momento. Es una disciplina basada en la experiencia del propio cuerpo, que conduce a la persona hacia una toma de conciencia de si misma y propone un aprendizaje para ...

  14. Ruptura de tejidos relacionales: huella de una sinergia corporativa

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    Luz María Rivas Montoya

    2012-06-01

    Full Text Available Los procesos de implementación de estrategias sinérgicas tienen, inevitablemente, efectos no previstos en los actores sociales de la organización. En este artículo, se presenta la ruptura de tejidos relacionales como un claro ejemplo de estos efectos o huellas*, que emergieron al narrar la experiencia individual que los actores sociales tuvieron con la sinergia corporativa en un grupo económico líder del sector de servicios en Colombia. Desde un método cualitativo, una aproximación etnográfica y un enfoque hermenéutico, se exploraron las experiencias y percepciones de diversos actores sociales. La ruptura de tejidos relacionales fue una de las categorías que emergió como huella relevante; esta ruptura se caracteriza por cambios en las relaciones laborales, tensión autonomía/heteronomía y conflictos de poder, situaciones que expresan las consecuencias no previstas de la implementación de la integración de servicios compartidos o sinergia corporativa. Es conveniente advertir que la principal limitación de este estudio exploratorio es que no permite la proposición de modelos ni la construcción de un caso de estudio metodológicamente riguroso. El pensamiento complejo desde la perspectiva de Edgar Morin iluminó el camino de reflexión acerca de la ruptura de tejidos relacionales en cuanto a huella. Estos tejidos son esenciales en cualquier tipo de organización, pero lo son aún más en grupos económicos donde la diversidad de los negocios y culturas exige redes para hacer más productiva y amable la rutina organizacional.

  15. Ruptura de tejidos relacionales: huella de una sinergia corporativa

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    Luz María Rivas Montoya

    2012-01-01

    Los procesos de implementación de estrategias sinérgicas tienen, inevitablemente, efectos no previstos en los actores sociales de la organización. En este artículo, se presenta la ruptura de tejidos relacionales como un claro ejemplo de estos efectos o huellas*, que emergieron al narrar la experiencia individual que los actores sociales tuvieron con la sinergia corporativa en un grupo económico líder del sector de servicios en Colombia. Desde un método cualitativo, una aproximación etnográfic...

  16. Desarrollo territorial en la Vega Media de Sevilla: Elementos de un tejido empresarial urbano-rural

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    Luis Galindo Pérez de Azpillaga

    2008-01-01

    Full Text Available El aprovechamiento de los posibles sistemas territoriales en los espacios desfavorecidos tiene que estar apoyado en su articulación productiva y que ésta, a su vez esté caracterizada por las iniciativas locales (micro-economía y el papel que juegan las empresas de cualquier tipo (privadas, públicas, mixtas, cooperativas, etc y los empresarios en cada una de ellas. Estos recursos económicos y productivos, unidades encargadas de organizar los factores productivos, se convierten en piezas fundamentales para lograr el crecimiento económico y la generación de empleo. El conocimiento detallado del tejido local de empresas, esto es, el conjunto de empresas y sus relaciones o los eslabonamientos productivos, resultan fundamentales para diseñar una estrategia de fomento productivo local. La falta de información sobre estos aspectos decisivos constituye una dificultad importante para el despegue de los procesos de desarrollo territorial. Aquí se ejemplariza en el caso de la Vega Media de Sevilla, resaltándose la posibilidad de establecer estrategias de sostenibilidad territorial, en una zona de contacto urbano-rural como es ésta, en función al aprovechamiento de los sistemas socio-productivos locales.

  17. Identificación de las principales proteínas de unión a IGF (IGFBP en tejidos de rata normal

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    Elizabeth Rico

    1999-12-01

    Full Text Available En este trabajo se investigó la presencia de las principales proteínas de unión a IGF-I en tejidos de rata y el tamaño de los complejos formados en cada caso. Mediante análisis de Western ligand blof (WLB y cromatografía de exclusión molecular, se separaron e identificaron cuatro proteínas de unión, correspondientes a las IGFBP-1 a IGFBP-4. En todos los tejidos analizados, se detectó la proteína IGFBP-3, aunque su concentración varió con el tipo de órgano, siendo muy abundante en hígado, riñón y corazón y escasa en órganos linfoides (timo y bazo. IGFBP-I e IGFBP-2 se identificaron en hígado y pulmón y, además, en corazón y músculo esquelético, órganos donde hasta el momento no se han identificado los correspondientes mARN, como tampoco IGFBP-4, identificada en este trabajo en pulmón. En conclusión, los resultados obtenidos indican un perfil típico para las IGFBP de acuerdo con el tejido, aunque no es claro aún si su presencia es el resultado de su síntesis NI situo de un transporte transcapilar. La identificación de sus mensajeros es un paso esencial para comprender el papel regulador que estas proteínas desempeñan en la biodisponibilidad del IGF-I en los diferentes tejidos.

  18. Usos del rayo Laser en Odontologia restauradora: Primera parte. Aspectos generales, clasificacion, interrelacion con los tejidos vivos y precauciones en el uso

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    Natera G, Alfredo E.

    2000-01-01

    Con este artículo se pretende dar comienzo a una serie de publicaciones para así plasmar todo lo relacionado con el uso de la tecnología Laser en la Odontología Restauradora. En este primer artículo leerá sobre los antecedentes y fundamentos físicos del Rayo Laser, la clasificación y tipos de Laser disponibles para ésta área de la Odontología, su interrelación con los tejidos vivos, así como las precauciones a tomar durante su uso. En las siguientes publicaciones se esta serie leeremos las pa...

  19. El virus de la D.V.B. como agente contaminante en cultivo de tejidos animales

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    Víctor J. Vera A.

    1992-03-01

    Full Text Available El Pestisvirus que produce la Diarrea Viral Bovina (V.D.V.B., ocasiona problemas reproductivos en el ganado vacuno y se encuentra ampliamente difundido en el país. La presencia de cepas no citopatogénicas del mismo, las cuales normalmente no se evidencian en los cultivos celulares contaminados con éste virus, han constituido un Iimitante para el establecimiento y mantenimiento de cultivos primarios y líneas celulares libres del V.D.V.B., para uso rutinario en actividades diagnósticas o investigativas. El suero fetal bovino (SFB es la fuente usual de contaminación para los cultivos de tejidos animales, dadas las escasas previsiones para el control de su calidad, ya que la recolección y mercadeo del SFB se realiza con criterios artesanales y sin los debidos controles de calidad. Específicamente en el caso del V.D.V.B., se pueden presentar dos situaciones con el SFB: que contenga partículas virales o que posea niveles de anticuerpos contra el virus; en ambos casos se darán problemas en los procedimientos realizados con dichos sueros. Con el fin de controlar las contaminaciones de los cultivos celulares con el VDVB, en el Postgrado de la Facultad de Medicina Veterinaria de la Universidad Nacional, se ha empleado la técnica de Inmunofluorescencia Indirecta (IFl para detectarlas tanto, en el SFB como en diferentes cultivos celulares, obteniéndose para el SFB el 25.8% de positivos de un total de 32 muestras de diferentes orígenes y para los cultivos celulares el 42.8% de positivos de 28 lotes, procedentes de diferente origen animal y centros de investigación, resultados que son comparables con los obtenidos por otros laboratorios internacionales como el National Animal Diseases Laboratory (NADL del Departamento de Agricultura de USA. Dentro de las recomendaciones para la prevención y control del problema en laboratorios de diagnóstico e investigación médica y veterinaria, que empleen tecnologías relacionadas con manejo y

  20. Matriz para ingenieria de tejido oseo: modificacion superficial con zinc Estudio preliminar

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    Martinez, Cristian; Olmedo, Daniel; Ozols, Andres

    2013-01-01

    El objetivo del presente trabajo es desarrollar un metodo de sintesis de matrices para ingenieria de tejidos, capaces de acelerar los procesos reparativos y disminuir el riesgo de infeccion, destinadas a cirugias reconstructivas que involucren el tejido oseo. A este fin se emplea la fase mineral de hueso bovino, la hidroxiapatita, conservando su estructura tridimensional. Esta se obtiene a partir de un proceso de lavado quimico, seguido de un proceso termico que elimina todos los componentes ...

  1. Restauración del tejido gingival a partir de fibroblastos autólogos

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    Eduvigis Solórzano N

    2013-12-01

    Full Text Available El interés de la investigación básica biomédica ha tenido un crecimiento vertiginoso en los últimos años y la odontología no escapa a esta motivación, es así como estamos en la búsqueda de alternativas de tratamiento a defectos de tejidos blandos y óseos que permitan resultados satisfactorios a nuestros pacientes desde el punto de vista estético y funcional, ya que en ocasiones, las limitaciones en la cantidad de tejido disponible para autoinjerto no permiten el éxito esperado, es por ello que la interdisciplinariedad ha permitido la exploración de nuevas fuentes de tejido bucal. Las investigaciones actuales se enfocan en el desarrollo y caracterización de tejidos equivalentes a la mucosa bucal y se ha demostrado que los fibroblastos del conectivo gingival participan eficientemente en la reparación de los tejidos, razón por la cual se están utilizando con mucho éxito en medicina regenerativa; así como también el aislamiento de células progenitoras mesenquimáticas a partir de diversos tejidos bucales, entre ellos el más utilizado, la pulpa dental.

  2. Tigeciclina en infecciones de piel y tejidos blandos complicadas.

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    José Yesid Rodríguez

    Full Text Available Resumen Objetivo: evaluar la mejor evidencia actual disponible para generar recomendaciones con respecto a la efectividad y seguridad del uso de tigeciclina en adultos con infección de piel y tejidos blandos (IPTB. Materiales y métodos: se realizó una revisión sistemática de la literatura, seleccionando los metaanálisis y experimentos clínicos controlados (ECCs, los cuales se valoraron utilizando la herramienta SIGN (Scottish Intercollegiate Guidelines Network., con el fin de generar tablas de evidencia según GRADE de los estudios de tigeciclina en la indicación de IPTB, para posteriormente utilizar un proceso Delphi modificado para calificar las diferentes recomendaciones. Resultados: la revisión sistemática se incluyeron 9 metaanálisis que incluyeron 5 estudios clínicos aleatorizados con 1873 pacientes, y de ellos 952 asignados al brazo de tigeciclina, no mostró inferioridad frente a los comparadores en curación clínica (RR= 0.76 IC95% 0,57 - 1.03, curación microbiológica (RR= 0.92 IC95% 0,61 - 1.38, eventos adversos serios RR 1,41 (IC95%0,97 a 2,35, ni mortalidad RR 1,9 (IC95%0,84 a 4,3. La tigeciclina puede relacionarse con mayor frecuencia de eventos adversos leves de origen gastrointestinal. Conclusión: en pacientes adultos con IPTB, se considera que el uso de tigeciclina en monoterapia en pacientes no críticamente enfermos es equivalente en eficacia a otras opciones terapéuticas antimicrobianas. Se debe considerar especialmente como terapia de ajuste en pacientes con infecciones polimicrobianas.

  3. Modificación en la valoración de la resistencia y reactancia del tejido adiposo corporal con las nuevas vías de administración de anticoncepción hormonal

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    Encinas Pardilla, María Begoña

    2013-01-01

    En este trabajo se han estudiado las posibles modificaciones que los contraceptivos hormonales vía oral, transdérmica y transvaginal podrían tener en la composición del tejido adiposo corporal durante un año, así como sus efectos en el perfil lipídico y el índice de masa corporal. Conociendo los efectos que las formulaciones hormonales orales tienen en el perfil lipídico, cabría esperar que también pudiera alterarse en alguna medida el porcentaje de grasa corporal o al menos su densidad, de...

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

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    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. Técnicas del futuro: ingeniería de tejidos y uso de células madre en medicina reproductiva

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    V. Cecilia Fabres, Dra.

    2010-05-01

    Full Text Available Últimamente ha cobrado gran interés en la comunidad médica y científica, el avance experimentado por la medicina regenerativa, la ingeniería de tejidos y el uso de terapias celulares en base a células autólogas maduras, como también el uso de células madre. Desde que se levantó en Estados Unidos, la prohibición de investigar con células madre embrionarias, se ha producido un aumento de las investigaciones en este campo. El interés por estas investigaciones, se ha traspasado a la comunidad no científica, que se encuentra expectante frente al progreso que se logre, con las terapias derivadas de tales estudios. En medicina reproductiva, existe la esperanza de poder producir células germinales tanto femeninas como masculinas (ovocitos o sus precursores y espermatozoides o sus precursores, a partir de células madre, para tratar pacientes con falla gonadal (ovárica o testicular, que hasta ahora resuelven su problema de infertilidad, mediante el uso de gametos donados, prevaleciendo la falla endocrina, que se resuelve con la administración de reemplazo hormonal. Las células madre son células indiferenciadas, toti potenciales que bajo ciertas condiciones, pueden diferenciarse a células especializadas. La medicina regenerativa se vale de la ingeniería de tejidos y las terapias celulares con células autólogas maduras y también con células madre. Este artículo es una revisión bibliográfica sobre las últimas investigaciones en el campo de la medicina regenerativa y el uso de células madre en medicina reproductiva. Se describen los diferentes tipos de células madre y los tejidos que se ha logrado reproducir in vitro hasta ahora, como también algunos estudios en animales y su aplicación en humanos.

  6. Epitelización inducida por células troncales derivadas del tejido adiposo

    OpenAIRE

    M. Meruane; S. Benítez; M. Rojas; A. Sagredo; K. Marcelain; B. Villalobos

    2014-01-01

    El tratamiento de lesiones con pérdida de tejido cutáneo ha mejorado notablemente con el advenimiento de la bioingeniería tisular. Una alternativa en desarrollo es la utilización de sustitutos dérmicos combinados con células troncales derivadas del tejido adiposo autólogo. Estudios previos nos muestran que con esta técnica es posible optimizar la angiogénesis y la síntesis de colágeno, sin embargo potenciar la epitelización es un tema pendiente por resolver. En el presente estudio evaluamos l...

  7. Enfermedades del tejido conectivo: Importancia del diagnóstico precoz

    Directory of Open Access Journals (Sweden)

    G. Patricia Abumohor, Dra.

    2012-07-01

    Full Text Available Las Enfermedades del Tejido Conectivo (ETC son entidades de baja prevalencia en la población general. Son de naturaleza inflamatoria y autoinmune, tienden a la cronicidad y al compromiso de muchos parénquimas, órganos y tejidos, dejando en ellos daño estructural y funcional. Dado lo anterior, amenazan la vida o disminuyen la expectativa y calidad de vida. El diagnóstico y tratamiento precoz de estas entidades, permite cambiar su curso y muchas veces lograr remisión. Es por lo tanto de suma importancia tenerlas en mente y sospecharlas como entidades de enfermedad e iniciar un tratamiento oportuno.

  8. Enfermedades del tejido conectivo: Importancia del diagnóstico precoz

    OpenAIRE

    G. Patricia Abumohor, Dra.

    2012-01-01

    Las Enfermedades del Tejido Conectivo (ETC) son entidades de baja prevalencia en la población general. Son de naturaleza inflamatoria y autoinmune, tienden a la cronicidad y al compromiso de muchos parénquimas, órganos y tejidos, dejando en ellos daño estructural y funcional. Dado lo anterior, amenazan la vida o disminuyen la expectativa y calidad de vida. El diagnóstico y tratamiento precoz de estas entidades, permite cambiar su curso y muchas veces lograr remisión. Es por lo tanto de suma i...

  9. 2013 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Tulalip Partnership

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In October 2012, WSI (Watershed Sciences, Inc.) was contracted by the Puget Sound LiDAR Consortium (PSLC)to collect Light Detection and Ranging (LiDAR) data on a...

  10. 2014 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Willapa Valley (Delivery 1)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In January, 2014 WSI, a Quantum Spatial (QSI) company, was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR) data...

  11. 2013 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Saddle Mountain

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In October 2013, WSI, a Quantum Spatial Company (QSI), was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR) data...

  12. 2015 Puget Sound LiDAR Consortium (PSLC) LiDAR: WA DNR Lands (P2)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In June 2014, WSI, a Quantum Spatial Inc. (QSI) company, was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR)...

  13. 2015 Puget Sound LiDAR Consortium (PSLC) LiDAR: WA DNR Lands (P1)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In June 2014, WSI, a Quantum Spatial Inc. (QSI) company, was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR)...

  14. 2009 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Lewis County, Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data for the Lewis County survey area for the Puget Sound LiDAR Consortium. This data...

  15. Peregrinaciones parisinas: Rubén Darío

    Directory of Open Access Journals (Sweden)

    Beatriz Colombi

    1996-11-01

    Full Text Available Hacia 1900 se nuclea en París un grupo de corresponsales latinoamericanos conformando una suerte de enclave que reúne a figuras como Rubén Darío, Manuel Ugarte, Amado Nervo o Enrique Gómez Carrillo. Desde sus respectivas columnas estos cronistas construyen imágenes del mundo moderno atravesadas por el conflicto de pertenencia y marginalidad respecto al mismo. Este trabajo analiza las entregas que Rubén Darío escribe para La Nación de Buenos Aires durante la Feria Internacional de Paris de 1900, en relación con su contexto discursivo. En la enunciación de estas crónicas se alternan pasajes donde prima la superficialidad de la crónica elegante parisina con otras secciones argumentativas que dan cuenta de los desplazamientos de este sujeto entre el 'chroniqueur' y el intelectual que interviene -con la autoridad que le otorga su liderazgo estético- en el campo de los sucesos políticos, desmoronando cualquier 'fetichización' del espectáculo. Darío trama en su crónica la línea 'ondulante' de su prosa de artista con la línea 'informativa' de su tarea de diarista, imponiendo una marca 'modern style' a su escritura, que privilegia imágenes donde se fusionan elementos de ámbitos dispares; también se contamina de la retórica del acontecimiento moderno, en una hibridez propia del efecto sumativo de ese vasto mercado. Las crónicas, reunidas luego en Peregrinaciones de 1901, señalan también el pasaje entre el gran mercado cultural y el pequeño mercado estético, en una posición anfibia propia de esta textualidad

  16. Infrastructure Investment Protection with LiDAR

    Science.gov (United States)

    2012-10-15

    The primary goal of this research effort was to explore the wide variety of uses of LiDAR technology and to evaluate their : applicability to NCDOT practices. NCDOT can use this information about LiDAR in determining how and when the : technology can...

  17. Saginaw Bay, MI LiDAR

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TASK NAME:(NRCS) Saginaw Bay, MI LiDAR LiDAR Data Acquisition and Processing Production Task USGS Contract No. G10PC00057 Task Order No. G11PD01254 Woolpert Order...

  18. APRENDER JUGANDO CON "TEJIDOS PRECOLOMBINOS" MEDIANTE ROMPECABEZAS VIRTUALES LEARN BY PLAYING WITH "PRE-COLUMBIAN TEXTILES" THROUGH VIRTUAL PUZZLES

    Directory of Open Access Journals (Sweden)

    Diego Aracena Pizarro

    2008-09-01

    Full Text Available Este trabajo presenta un ambiente multimedia de rompecabezas sobre tejidos precolombinos de gran complejidad ornamental, expuestos en el Museo Arqueológico San Miguel de Azapa, Arica-Chile. El rompecabezas permite interaccionar de manera más entretenida y didáctica, con el objetivo de que la facilidad del uso del software permita aprender jugando, observando los intrincados símbolos y signos precolombinos que de otra manera pasan desapercibidos por no formar parte del ideario de los estudiantes actuales. El software se evaluó con alumnos de enseñanza básica y media de establecimientos educacionales de la ciudad, con el objetivo de complementar sus estudios a las asignaturas de historia que contienen temática prehispánica. Esta representación educacional fue implementada con herramienta Flash multimedia, con el propósito de estimular la parte creativa de los estudiantes y de abrir un mundo de juegos complementarios referentes al mismo tema, con la filosofía de aprender jugando.This paper presents a multimedia environment puzzle about Pre-Columbian textiles exhibiting ornamental complexities, found in the Archeological Museum San Miguel de Azapa, Arica-Chile. The software allow for an enjoyable and didactic interactive way of learning by playing, giving the users the opportunity of identifying intricate pre-Columbian symbols and signals, that otherwise would be unnoticed. The software was tested with schoolboys of ages 12 to 16 years old, from schools in Arica, with the purpose of complementing their studies in History courses containing Pre-hispanic topics. This educational software was implemented with Multimedia Flash Tool, so as to stimulate the creativity of the students, opening a world of complementary games with the philosophy of "learning by playing".

  19. Regeneracion osea por implante de celulas madre mesenquimales derivadas de tejido adiposo humano en un modelo animal

    OpenAIRE

    Linero Segrera, Itali Marcelly

    2012-01-01

    La reconstrucción y restauración de la función esquelética continúa siendo un reto en el campo de la cirugía maxilofacial y la ortopedia. Una alternativa o terapia coadyudante a los tratamientos convencionales es la ingeniería de tejidos que surge como una posibilidad prometedora para la regeneración del tejido óseo. Con el fin de crear un modelo para la aplicación clínica de las células madre mesenquimales derivadas de tejido adiposo humano (Ad-MSCs) desarrollamos una matriz tridimensi...

  20. Mecanismos de regulación del anabolismo lipídico en el tejido adiposo del paciente obeso

    OpenAIRE

    Ortega Delgado, Francisco José

    2012-01-01

    La obesidad es uno de los problemas de salud pública más importante. Los estudios de expresión aplicados a los depósitos de grasa en sujetos obesos han aportado importantes indicios sobre la fisiopatología del tejido adiposo. Los datos recogidos en esta tesis doctoral demuestran que la síntesis de grasa (lipogénesis) está disminuida en el tejido adiposo del paciente obeso, y describen el comportamiento de un nuevo factor lipogénicos. Se demuestra además que el tejido adiposo subcutáneo (situa...

  1. La manufactura de hilados y tejidos en la historiografía mexicana, siglos XVIII y XIX. Obrajes, protoindustrias, empresariado y fábricas textiles

    Directory of Open Access Journals (Sweden)

    Mario Trujillo Bolio

    2017-01-01

    Full Text Available El propósito de este artículo es hacer una revisión puntual sobre la historiografía que aborda temas y problemas relativos a la manufacturera textil en la sociedad novohispana y el México independiente. Emprende un análisis crítico que condensa las distintas obras sobre los obrajes en Puebla, Querétaro, Texcoco, Tlaxcala, Coyoacán y San Ángel, así como las formas de producción protoindustriales que permitieron la fabricación de paños de lana en Nueva España. Contempla un detenido estudio de la proliferación de trabajos que se han ocupado en dilucidar el significado de la producción de hilados y tejidos en las distintas regiones del México decimonónico. Se destacan, además, los temas más sobresalientes que se desprenden de la producción manufacturera en las llamadas protofábricas como en centros fabriles que elaboraron hilados y tejidos de lana y algodón. También se diferencia el contenido de las contribuciones que se han ocupado de diferenciar distintas fases de la industrialización textil mexicana y del surgimiento de un empresario textil en los estados de Puebla, México, Nuevo León, Jalisco, Ciudad de México y sus alrededores, Michoacán y Guanajuato.

  2. Mosaico del cromosoma X en diferentes tejidos de pacientes con falla ovárica prematura

    Directory of Open Access Journals (Sweden)

    M.E. Arteaga Espinosa

    2015-06-01

    Conclusión: La existencia de mosaicismo de bajo grado puede ser la causa de falla ovárica prematura. Este estudio indica que es necesario más de un tipo de tejido para identificar el mosaicismo de bajo grado. Por ello, el estudio de células del urotelio puede incluirse dentro del abordaje diagnóstico de las pacientes con esta enfermedad.

  3. Sustitutos e injertos de piel desarrollados por ingeniería de tejidos

    Directory of Open Access Journals (Sweden)

    María Inés Chaves-Rodríguez

    2015-05-01

    Full Text Available La reconstrucción de tejidos y órganos mediante ingeniería de tejidos ha permitido la elaboración y comercialización de diversos sustitutos o equivalentes epiteliales, que han sido utilizados desde hace más de 30 años a escala internacional para el tratamiento de lesiones en pacientes humanos. Estos injertos o implantes se confeccionan con materiales biodegradables (naturales o polímeros sintéticos que sirven como matrices para la adhesión y proliferación celular y pueden contener células de diversos orígenes (autólogas, alogénicas o xenogénicas. Su principal ventaja clínica consiste en proporcionar una reepitelización efectiva en lesiones de gran extensión, lo que es particularmente relevante cuando hay poco tejido disponible para hacer autoinjertos. Además, ofrecen una cobertura al lecho de la lesión, evitando la deshidratación y las infecciones microbianas. Sin embargo, aún existen numerosos retos para asegurar la funcionalidad inmediata y la permanencia a largo plazo de los implantes, así como la reproducción exacta de la estructura y fisiología normal del tejido. En Costa Rica, el Centro de Investigación en Biotecnología del Instituto Tecnológico de Costa Rica cuenta con el único laboratorio en el país dedicado al cultivo in vitro de células de piel para la reconstrucción de equivalentes epiteliales con fines terapéuticos.

  4. Cancer Grafted in Aberrant Breast Tissue Cáncer injertado en tejido mamario aberrante

    Directory of Open Access Journals (Sweden)

    Lidia Torres Ajá

    2012-03-01

    Full Text Available Among the anomalies during embryonic development of the breasts we may find supernumerary breasts and aberrant ectopic tissue. In both of them, malignant tumors of the breast can proliferate, mostly in aberrant tissue. We present the case of a female patient aged 73, who refers to have always had a "little mammary gland in the left submammary that never caused discomfort to the last two months when its volume increased and the skin retracted". Excisional biopsy allowed diagnosing an infiltrating ductal carcinoma, the first case of carcinoma grafted in aberrant breast tissue diagnosed in the province.

    Entre las anomalías del desarrollo embrionario de las mamas se encuentran las mamas supernumerarias y el tejido ectópico aberrante. Ambas pueden ser asiento de tumores malignos de la mama, en mayor número  el tejido aberrante. Se presenta el caso de una paciente femenina de 73 años, que refiere tiene desde siempre una “mamita pequeña en el surco submamario izquierdo la cual nunca le ocasiono molestias hasta hace 2 meses en que aumentó de volumen y se le retrajo la piel". Mediante biopsia escisional se le diagnostica un carcinoma ductal infiltrante, siendo así  el primer caso de carcinoma injertado en tejido mamario aberrante diagnosticado en nuestra provincia.

  5. Características biológicas del tejido adiposo: el adipocito como célula endocrina

    Directory of Open Access Journals (Sweden)

    Reyes J. Marcela, Dra.

    2012-03-01

    Full Text Available La obesidad se caracteriza por un aumento de la masa adiposa secundaria a un balance energético positivo mantenido en el tiempo. El incremento en el volumen del tejido adiposo se acompaña de otros cambios en las características biológicas habituales de éste, que se vuelve disfuncional. El depósito visceral de la grasa, la hipertrofia y cambio del perfil secretor de los adipocitos, junto con la infiltración del tejido adiposo por células inflamatorias son algunas de las características que determinan una comunicación alterada del tejido adiposo con otros órganos. Se ha planteado que la disfunción del tejido adiposo, explicaría parte de la etiopatogenia de las enfermedades metabólicas y cardiovasculares asociadas a obesidad; sujetos obesos que mantienen un tejido adiposo funcional no presentan las alteraciones metabólicas propias de la malnutrición por exceso. La modulación de las características biológicas del tejido adiposo permitiría tener un menor riesgo cardiovascular asociado a obesidad.

  6. Iowa LiDAR Mapping Project

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — This is collection level metadata for LAS and ASCII data files from the statewide Iowa Lidar Project. The Iowa Light Detection and Ranging (LiDAR) Project collects...

  7. USGS Atchafalaya 2 LiDAR

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Light Detection and Ranging (LiDAR) dataset is a survey of the Atchafalaya Basin project area. The entire survey area for Atchafalaya encompasses approximately...

  8. Hawaii DAR Dealer Reporting System Data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In 2000 January, the Hawaii Division of Aquatic Resources (DAR) implemented a computerized data processing system for fish dealer data collected state-wide. Hawaii...

  9. University of Dar es Salaam Library Journal

    African Journals Online (AJOL)

    University of Dar es Salaam Library Journal. ... PROMOTING ACCESS TO AFRICAN RESEARCH ... These include organization and dissemination of information, library education and training, information technology and its application in ...

  10. El folklore y sus paradojas

    Directory of Open Access Journals (Sweden)

    HONORIO M. VELASCO MAILLO

    1990-01-01

    Full Text Available Uno de los rasgos más sobresalientes de la historia del folklore en España y otras naciones europeas son sus paradojas. Propuesto primero como ciencia ha llegado a ser claramente rechazado por posteriores ambientes científicos. Tendría interés hacer una historia social del folklore. Este artículo sugiere que tales paradojas y contradicciones están relacionadas con el paradigma científico que asumieron sus promotores, el evolucionismo cultural y con un concepto idealizado de "pueblo", que ayudaron a construir presentando colecciones de materiales. También analiza las diferentes funciones sociales que ha cumplido el discurso folklórico.

  11. Efectos de la deficiencia de riboflavina sobre el desarrollo del tejido dentoalveolar, en ratas

    Directory of Open Access Journals (Sweden)

    Juana Delgadillo

    2009-03-01

    Full Text Available Objetivo: Determinar los cambios histomorfológicos que ocurren en el tejido dentoalveolar de la mandíbula de una progenie de ratas albinas sometidas a dietas con diferentes concentraciones de riboflavina (B2 e iguales concentraciones de los demás nutrientes, durante el periodo de gestación y lactancia, hasta los 28 días de edad. Diseño: Estudio experimental y analítico. Lugar: Centro de Investigación de Bioquímica y Nutrición Alberto Guzmán Barrón, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico: Crías de ratas albinas Holtzman. Intervenciones: Se utilizó 60 crías de ratas, que fueron progenie de 16 ratas albinas Holtzman, conformándose 4 grupos con capacidad de reproducción y con diferentes requerimientos de riboflavina: Grupo A (100% de requerimiento de B2, Grupo B (50% de B2 Grupo C (25% de B2 y Grupo D (0% de B2. Las crías de cada grupo fueron sacrificadas a los 0, 7, 14, 21 y 28 días de nacimiento, y se sometió a estudios histológicos los tejidos dentoalveolares de 60 crías. Principales medidas de resultados: Alteraciones en la talla, peso corporal y el tejido dentoalveolar de las ratas crías. Resultados: Microscópicamente, el estudio reveló que la carencia total de riboflavina en la dieta materna (0% de B2 ocasiona en el tejido dentoalveolar de las crías cambios histomorfológicos, como pérdida de la polaridad nuclear, presencia de microvacuolas y áreas de pseudo-estratificación en ameloblastos y odontoblastos, disminución del número de células del tejido dentoalveolar, aparición de edema en predentina, disminución de las células activas en el caso de fibroblastos y cementoblastos, notable disminución y adelgazamiento de las fibras colágenas y reducción del grosor de las trabeculas óseas. Alteraciones similares pero en menor cuantía se halló en ratas con deficiencia de B2. Conclusiones: La carencia total de riboflavina (0% en la dieta materna de las

  12. Aplicaciones clínicas de las células madre del tejido adiposo

    OpenAIRE

    B. Castro

    2013-01-01

    En la actualidad, las células madre del tejido adiposo (ASC) juegan un papel crucial en las estrategias de reparación o regeneración tisular. Son células mesenquimales multipotenciales que se pueden obtener fácilmente de lipoaspirados. Tras un proceso de digestión enzimática y centrifugación, se recoge la fracción estromal vacular (SVF) en el sedimento obtenido y se purifican las ASC a través del cultivo en plástico y realización de varios subcultivos. Hay diversos aspectos que han convertido...

  13. a Darío Bentancurt, el de la novísima historia

    Directory of Open Access Journals (Sweden)

    Javier Guerreo Barrón

    1999-01-01

    Full Text Available Ha perdido Colombia, y de que forma, a muchos de sus mejores hombres y mujeres y recientemente, el turno macabro le tocó a la inteligencia. Darío Betancourt Echeverry, nació en Restrepo, Valle, el 10 de diciembre de 1952. Estudió Ciencias Sociales en la Universidad Nacional y en la Universidad Libre. Su primera etapa profesional trasegó sobre la historia colonial y el movimiento Comunero, de la cual quedan dos obras: "Historia de Colombia" Colonial,(Bogotá, Universidad Santo Tomás, 1985 e "Historia de la Edad Media", (Bogotá, Universidad Santo Tomás, 1986.

  14. Color tejido

    OpenAIRE

    Rius Tormo, Palmira

    2010-01-01

    Póster presentado en el IX Congreso Nacional del Color, Alicante, 29-30 junio, 1-2 julio 2010. La exposición que se propone tiene como núcleo principal el color y muestra las posibilidades expresivas que aporta a los diferentes materiales. Las 7 obras presentadas buscan la armonía estética y la fuerza simbólica.

  15. Complex Urban LiDAR Data Set

    OpenAIRE

    Jeong, Jinyong; Cho, Younggun; Shin, Young-Sik; Roh, Hyunchul; Kim, Ayoung

    2018-01-01

    This paper presents a Light Detection and Ranging (LiDAR) data set that targets complex urban environments. Urban environments with high-rise buildings and congested traffic pose a significant challenge for many robotics applications. The presented data set is unique in the sense it is able to capture the genuine features of an urban environment (e.g. metropolitan areas, large building complexes and underground parking lots). Data of two-dimensional (2D) and threedimensional (3D) LiDAR, which...

  16. COMUNIDADES DE APRENDIZAJE EN CONTEXTOS NO FORMALES. LA EXPERIENCIA DE UN TALLER DE TEJIDO

    Directory of Open Access Journals (Sweden)

    Rocío Belén Martín

    2011-01-01

    Full Text Available El propósito de este artículo es describir y analizar los rasgos que propician la creación de una comunidad potencial para el aprendizaje en un contexto no formal; en este caso, el estudio se realiza en un taller de tejido. Participaron aproximadamente 11 mujeres, con edades entre los 25 y los 70 años, quienes asistieron durante el año 2010 a un taller de tejido que se desarrolló en una Asociación Vecinal dependiente de la Municipalidad de la ciudad de Río Cuarto, Argentina. Los datos fueron recabados a través de observaciones de clases, entrevistas a los participantes y a la profesora del curso. Los resultados de la investigación muestran que en este contexto no formal se fomenta el despliegue de algunas dimensiones propias de las comunidades de aprendizaje, como: la retroalimentación, la autonomía, las metas compartidas, la identidad, problemas genuinos y la construcción colaborativa del conocimiento. Los resultados hallados refuerzan las tendencias actuales en el campo de la Psicología Educacional, sobre el valor del contexto de aprendizaje, es decir, en el modo en que las personas crean contextos a través de la relación que se establece entre la persona y los componentes de una actividad.

  17. Estudio de predicción de vida a fatiga de implantes dentales de titanio y de sus principales tipos de conexiones implantoprotésicas

    OpenAIRE

    Ivorra Server, Carlos

    2017-01-01

    Tesis Doctoral leída en la Universidad Rey Juan Carlos de Madrid en 2017. Directores de la Tesis: Juan Carlos Prados Frutos y Carlos Navarro Vila Se denomina implante dental al elemento aloplástico que se aloja en el tejido óseo o debajo del periostio con la finalidad de reemplazar los dientes ausentes (Schou et al. 2000). La Academia Americana de Implantología (AAID, por sus siglas en inglés) define el implante dental como un elemento cilíndrico, fabricado generalmente de tita...

  18. Adhesión entre polímeros dentales, influencia de sus componentes y sistema de polimerización

    OpenAIRE

    Paz, Alejandro; Arias, Silvia; Gardinerc, Ricardo; Abel, Vilma

    2015-01-01

    Muchos trabajos científicos hacen hincapié en el estudio de la unión de los sistemas de fijación a los tejidos dentarios, creemos que se debe estudiar a los sistemas adhesivo basando sus uniones a dentina y esmalte pero sabemos que debe analizarse el comportamiento con todos los sustratos intervinientes es por eso que es necesario la observación de la unión con el material restaurador o medio de cementado mediante la capa inhibida que forma el adhesivo dentinario. Se confeccionaron dos grupos...

  19. Sistematización de la experiencia de las promotoras familiares y comunitarias a partir de sus prácticas y vivencias

    OpenAIRE

    Barriga Lesmes, Carmenza; Bustamante López, Diana; Sánchez Echeverri, Jorge

    2016-01-01

    Tesis (Maestría en Educación y Desarrollo Humano). Universidad de Manizales. Facultad de Ciencias Sociales y Humanas. CINDE, 2016 El programa Colombianos apoyando colombianos, operado por la Fundación CINDE (Centro Internacional de Educación y Desarrollo Humano), promueve “una forma solidaria de mejorar las condiciones de la niñez, sus familias y comunidades”. Surge en ambientes sociales marginados, apostándole a la construcción de tejido social. Para su desarrollo y operación, el programa...

  20. Assessment on Vulnerable Youths Integration to Dar es Salaam ...

    African Journals Online (AJOL)

    Assessment on Vulnerable Youths Integration to Dar es Salaam Solid Waste ... existing municipal solid waste management crisis facing Dar es Salaam City using ... enabling environment of turning rampant solid waste collection a commercial ...

  1. LiDAR data for the Delta Area of California

    Data.gov (United States)

    California Natural Resource Agency — LiDAR data for the Delta Area of California from the California Department of Water Resources. Bare earth grids from LiDAR.This data is in ESRI Grid format with 2...

  2. Necrosis de injerto de tejido conectivo subepitelial asociado a incompetencia labial: Reporte de un caso clínico

    OpenAIRE

    Basualdo,Javier; Niño,Ana Y

    2015-01-01

    Se describe el reporte del caso de una paciente sana con incompetencia labial portadora de un implante dental en la zona de 1.2, a la cual se le realizó un injerto de tejido conectivo utilizando la técnica del «sobre» para mejorar un leve defecto estético existente. El injerto sufrió una necrosis, posiblemente debido a la condición de deshidratación a la que están sometidos los tejidos en estos pacientes que presentan incompetencia labial y respiración bucal. Se describe la resolución quirúrg...

  3. Terapias Celulares y Productos de Ingeniería de Tejidos para el Tratamiento de Lesiones Condrales de Rodilla

    OpenAIRE

    Flórez Cabrera, Adriana; González Duque, Martha Isabel; Fontanilla, Marta R.

    2017-01-01

    RESUMEN El cartílago articular es un tejido vulnerable a las lesiones de diferente etiología; siendo uno de los más afectados, el cartílago de la rodilla. Aunque la mayoría de los tratamientos convencionales reducen los síntomas, generalmente conducen a la formación de fibrocartílago; el cual, posee características diferentes a las del cartílago hialino de las articulaciones. Son pocas las aproximaciones terapéuticas que promueven el reemplazo del tejido dañado por cartílago hialino funcional...

  4. Sitios de infección por hongos más frecuentes en la zanahoria (Daucus carota L. y patogenicidad en sus diferentes tejidos.

    Directory of Open Access Journals (Sweden)

    German Rivera

    2016-03-01

    Full Text Available Fungi from carrot roots collected in the field local market were isolated and identified. Sites of natural infection on the root were recorded. Sixteen genera were identified and their pathogenicity tested by  placing them on: not wounded periderm, pericyclic parenchyma, phloem parenchyma and xylem parenchyma. Half of the total fungi was isolated in both field and market samples. The most frequent natural infection sites were the crown, end of the tap root, and lateral roots. In the pathogenicity tests a gradient of resistance was shown varying from a very high level at periderm to a low level at the xylem parenchyma.  Sclerotinia sclerotiorum,  Sclerotium rolfsii, Fusarium tricinctum, F. nivale, F. solani, F. oxysporum, Fusarium sp., Trichoderma sp. y Gliocladium sp., all penetrated directly throught the periderm and also infected the other tissues. Geotrivhum candidum Rhizopus stolonifer . Verticillium sp., Penicillium so., and Candida sp. did no intect the periderm, but were pathogenic  to the pericyclic, phloem, and xylem parenchyma. Phoma sp. and Mucor sp. only infected phloem and xylem parenchyma.

  5. Confort higrotérmico en el espacio público en un tejido tradicional: el caso del barrio de Embajadores

    Directory of Open Access Journals (Sweden)

    María Victoria Fernández Añez

    2015-01-01

    Full Text Available ResumenEl diseño del espacio público debería adaptase a las condiciones territoriales y climáticas de las ciudades. El confort térmico se considera así un factor fundamental que influye en el uso del espacio público. Al haberse desarrollado de forma progresiva, los tejidos urbanos tradicionales se adaptan a estas condiciones climáticas del entorno, y la configuración de los espacios públicos situados en ellos tiene estos factores en cuenta.Esta investigación tiene como objetivo confirmar si las condiciones climáticas en el espacio público del barrio de Embajadores permiten alcanzar el confort térmico en el espacio público.La metodología propuesta contrasta el análisis de tres aspectos diferentes (clima, diseño del espacio público y confort térmico con la opinión de sus usuarios. De esta forma se evalúa la proximidad de las diferentes formas de análisis a las opiniones de las personas y se confirma la posibilidad de alcanzar el confort térmico en el espacio público en el tejido urbano analizado.Palabras clave  Confort, microclima urbano, espacio público, percepción, índice de confort.AbstractPublic space design should be adapted to territorial and climatic conditions of each city. Thermal comfort is a very important factor that influences public space use. Traditional urban fabrics are presumed to be adapted to these conditions, having developed in a progressive way.  Hence, its public spaces configuration must have taken these factors into account.This research aims to confirm whether climatic conditions in public space in Embajadores neighbourhood allows reaching thermal comfort in public space. A methodology that contrasts three different analysis aspects climate, public space design and thermal comfort with the opinion of daily users. This way it will be possible to evaluate which of the analysis is closer to the opinions of people and confirm the possibility of reaching thermal comfort in public space in the

  6. LiDAR utility for natural resource managers

    Science.gov (United States)

    Andrew Thomas Hudak; Jeffrey Scott Evans; Alistair Mattthew Stuart. Smith

    2009-01-01

    Applications of LiDAR remote sensing are exploding, while moving from the research to the operational realm. Increasingly, natural resource managers are recognizing the tremendous utility of LiDAR-derived information to make improved decisions. This review provides a cross-section of studies, many recent, that demonstrate the relevance of LiDAR across a suite of...

  7. 2012 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Quinault River Watershed, Washington (Delivery 1)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data on the Quinault watershed survey area for the Puget Sound LiDAR Consortium. This...

  8. 2014 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Cedar River Watershed (Delivery 2)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In September 2013, WSI, a Quantum Spatial company (QSI), was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR)...

  9. 2014 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Cedar River Watershed (Delivery 1)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In September 2013, WSI, a Quantum Spatial company (QSI), was contracted by the Puget Sound LiDAR Consortium (PSLC) to collect Light Detection and Ranging (LiDAR)...

  10. Development of digital subtraction system DAR-1200

    International Nuclear Information System (INIS)

    Kawai, Masumi; Shimizu, Yasumitsu; Ozaki, Takeshi; Sawada, Hiroshi; Uzuyama, Kazuhiro; Nishioka, Hiroyuki

    1989-01-01

    Digital subtraction angiography (DSA) has been of widespread use clinically, and it has attracted considerable attention in angiographic examination today. The merits of Shimadzu high resolution digital subtraction system DAR-1200 are reported in this paper. Furthermore, the principle and clinical usefullness of a new method of DSA called the Peak-Hold DSA are explained especially in details. (author)

  11. Excreta Disposal in Dar-es-salaam

    NARCIS (Netherlands)

    Chaggu, E.; Mashouri, D.; Buuren, van J.C.L.; Sanders, W.T.M.; Lettinga, G.

    2002-01-01

    The sociocultural and socioeconomic situation of sanitation in Dar-es-Salaam (Dsm), Tanzania, was studied with explicit emphasis on pit-latrines. Without considering the sociocultural conditions, the so-called best solution might not be the right one. Therefore, in order to achieve the intended

  12. Orienteerumiskaart vs. LiDAR / Marek Karm

    Index Scriptorium Estoniae

    Karm, Marek

    2012-01-01

    Bakalaureusetööst, mille eesmärk oli võrrelda orienteerumiskaardi reljeefi LiDAR-i andmete põhjal saadava reljeefimudeliga ning leida vastus küsimusele, kas o-kaart võib olla kasulik kooste- või kontrollmaterjal mistahes reljeefimudelile

  13. 2000 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Kitsap Peninsula, Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TerraPoint surveyed and created this data for the Puget Sound LiDAR Consortium under contract. The area surveyed is approximately 1,146 square miles and covers part...

  14. 2003 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Snohomish County, Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TerraPoint surveyed and created this data for the Puget Sound LiDAR Consortium under contract. The area surveyed is approximately 167 square miles and covers a...

  15. 2011 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Rattlesnake

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data on six days between September 15th and November 5th, and from November 6th - 13th,...

  16. 2005 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: North Puget Sound Lowlands

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Terrapoint collected Light Detection and Ranging (LiDAR) data contributing to the Puget Sound Lowlands project of 2005. Arlington, City of Snohomish, Snohomish...

  17. 2003 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Lewis County, Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TerraPoint surveyed and created this data for the Puget Sound LiDAR Consortium under contract. The area surveyed is approximately 100 square miles and covers part of...

  18. 2013 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Nooksack

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In July 2012, WSI (Watershed Sciences, Inc.) was contracted by the Puget Sound LiDARConsortium (PSLC) to collect Light Detection and Ranging (LiDAR) data on a...

  19. 2005 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Lewis County

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Terrapoint collected Light Detection and Ranging (LiDAR) data for the Lewis County project of 2005. The project site covered approximately 223 square miles, divided...

  20. 2005 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Olympic Peninsula

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Terrapoint collected Light Detection and Ranging (LiDAR) data for the Olympic Peninsula project of 2005, totaling approximately 114.59 sq mi: 24.5 for Clallam...

  1. 2012 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Upper Naches River, Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data of the Upper Naches River Valley and Nile Slide area of interest on September 30th,...

  2. 2013 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Entiat

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In October 2012, WSI (Watershed Sciences, Inc.) was contracted by the Puget Sound LiDARConsortium (PSLC) to collect Light Detection and Ranging (LiDAR) data for the...

  3. De la biología al injerto de tejido adiposo: cómo mejorar el lipoinjerto

    Directory of Open Access Journals (Sweden)

    A.C. Girard

    2013-12-01

    Full Text Available A pesar de que el uso del injerto de grasa ha ganado popularidad, no hay consenso sobre la mejor manera de manejar el tejido adiposo. Los protocolos difieren y los resultados son a menudo variables. Diversos factores influyen en la calidad de la grasa inyectada, entre los que encontramos las moléculas tóxicas provenientes de la infiltración, procedimiento previo a la liposucción. En este trabajo, hemos confirmado el efecto nocivo de los anestésicos sobre las células madre derivadas del tejido adiposo, determinando el efecto del lavado y la centrifugación en el tejido graso con el fin de proponer un protocolo simple y optimizado para mejorar la supervivencia del injerto. Evaluamos la citotoxicidad de la lidocaína sobre las células madre derivadas de tejido adiposo (ADSC mediante ensayo de LDH. Sometimos el tejido adiposo conjunto a varios tipos de centrifugación (de 1 segundo a 10 minutos y desde 0 g a 1800 g, y el volumen de líquido y el aceite liberado se midió inmediatamente después de la centrifugación. Tras la determinación de las condiciones óptimas para la manipulación de tejidos (400 g/1 minuto, inyectamos el tejido adiposo de liposucción sin o con lidocaína en ratones inmunodeficientes. Un mes después de la inyección, evaluamos la calidad de los injertos mediante histología, y en comparación con los injertos obtenidos a partir de un protocolo convencional: una simple sedimentación. La lidocaína ejerce un efecto citotóxico sobre las ADSC, y este efecto depende del tiempo de incubación y de las concentraciones. En cuanto al tejido adiposo, una centrifugación intensa (900 g, 1800 g es perjudicial en comparación con una centrifugación suave (100 g, 400 g. Además, las secciones histológicas de los injertos de tejido adiposo no centrifugados mostraron la presencia de grandes vacuolas de aceite mientras que los injertos resultantes de lavado con protocolo de centrifugación suave (400g/1minuto no lo hacen. En

  4. Tejido adiposo como glándula endocrina. Implicaciones fisiopatológicas.

    Directory of Open Access Journals (Sweden)

    Illovis Ramírez Arteaga

    2011-08-01

    Full Text Available

    El tejido adiposo se considera en la actualidad como un órgano con importante función endocrina; distinguiéndose dos tipos: el pardo y el blanco. El tejido adiposo es capaz de secretar diversas sustancias conocidas como adipocinas que se encuentran implicadas en la regulación del peso corporal, en el sistema inmune, en la función vascular y en la sensibilidad insulínica. En la obesidad, principalmente visceral, se encuentran aumentadas las adipocinas proinflamatorias. Estas se asocian a la inflamación clínica y subclínica, a la insulinorresistencia, al estrés oxidativo y a la lesión endotelial; desarrollan un papel clave en el síndrome metabólico e incrementan el riesgo cardiometabólico. El objetivo de la presente revisión bibliográfica ha sido exponer las características morfofuncionales del tejido adiposo y los mecanismos que lo vinculan con la génesis de diversas enfermedades.

    ADIPOSE TISSUE AS AN ENDOCRINE GLAND. PATHOPHYSIOLOGICAL IMPLICATIONS.

    Adipose tissue is currently recognized as an organ with an important endocrine function. Two main types of adipose tissue are distinguished: the brown and the white. Adipose tissue can secrete a variety of substances known as adipokines that are implicated in the regulation of body weight, the immune system and the vascular functioning and the insulin sensitivity. In cases of obesity (mainly visceral obesity, proinflammatory adipokines are increased. They are commonly associated with clinical and subclinical inflammation, insulin resistance, oxidative stress and endothelial injury. Proinflammatory adipokines also play a key role in the metabolic syndrome and increase cardiometabolic risk. The present review is aimed at exposing the morphofunctional characteristics of adipose tissue and the mechanisms that link this tissue to the origin of a variety

  5. Secreción de factores de crecimiento y citoquinas, durante la producción de tejido artificial bajo dos concentraciones diferentes de oxígeno en un biorreactor tipo Spinner

    OpenAIRE

    Nieto Patarroyo, Diana Isabel

    2014-01-01

    Convencionalmente, pérdidas grandes de tejido, aquellas que no se pueden suturar, se tratan con autoinjertos, provenientes del propio paciente, aloinjerto, tejidos compatibles de la misma especie, o xenoinjertos, provenientes de otras especies. Sin embargo, tienen problemas respecto a la disponibilidad, rechazo y transmisión de enfermedades. Por ello, la ingeniería de tejidos y la medicina regenerativa desarrollan terapias que reemplacen, restablezcan o mejoren las funciones de tejidos lesion...

  6. Donación y trasplante de órganos y tejidos

    OpenAIRE

    Caicedo Rusca, Luis Armando; Alex, Castro; Ordóñez, Vasco; Jurado, Fátima; Echeverry, Patricia; Fundación Valle de Lili

    2010-01-01

    Donación y trasplante de órganos y tejidos/¿Crees en la vida después de la vida?/Qué dice la ley colombiana/Tipos de donantes de órganos/el dónate de órganos una urgencia de vida o muerte/ Quién puede ser donante de órganos/ Trayectoria de los trasplantes en la Fundación Valle del Lili/Preguntas y respuestas/ ¿Cuáles son los órganos que más se requieren para trasplante?/¿Qué trasplantes se realizan en Colombia?/¿Cómo hacen para enterarse que una persona es donante de órganos si el paciente es...

  7. Modelo conceptual e instrumental de sostenibilidad organizacional a partir de la evaluacion del tejido social empresarial

    Directory of Open Access Journals (Sweden)

    Diana Maria Garzon R.

    2004-12-01

    Full Text Available Las organizaciones actuales enfrentan condiciones cada vez más cambiantes que les exigen capacidad de adaptarse y mantenerse en el tiempo. El presente artículo propone un modelo conceptual e instrumental de sostenibilidad, que se fundamenta en diferentes concepciones y enfoques, con los cuales se ha abordado la realidad del ser humano en las organizaciones, a partir de la introducción del concepto de tejido social empresarial. La investigación de campo se realizó en un grupo de empresas del sector biotecnológico colombiano. Se planteó una nueva perspectiva en la administración del factor humano enfocada en la sostenibilidad organizacional, y centrada en el análisis de la realidad que experimentan las personas en las organizaciones de hoy.

  8. Epitelización inducida por células troncales derivadas del tejido adiposo

    Directory of Open Access Journals (Sweden)

    M. Meruane

    2014-06-01

    Full Text Available El tratamiento de lesiones con pérdida de tejido cutáneo ha mejorado notablemente con el advenimiento de la bioingeniería tisular. Una alternativa en desarrollo es la utilización de sustitutos dérmicos combinados con células troncales derivadas del tejido adiposo autólogo. Estudios previos nos muestran que con esta técnica es posible optimizar la angiogénesis y la síntesis de colágeno, sin embargo potenciar la epitelización es un tema pendiente por resolver. En el presente estudio evaluamos la progresión y diferenciación epitelial en un período de tiempo prologando. Obtuvimos las células troncales a partir del tejido adiposo (ASC de la región inguinal de 4 ratas Sprague Dawley. Cultivamos las células frescas en una matriz de Integra® durante un período total de 48 horas, y las marcamos con un vector lentiviral-GFP (proteína fluorescente verde. Posteriormente, injertamos en las mismas ratas la matriz dérmica con células troncales y un implante contralateral sin células, como control. A las 4 semanas, evaluamos el avance epitelial mediante planimetría de superficie e histología. Los resultados macroscópicos muestran que el cierre de la herida por contracción de los bordes no tiene diferencias significativas (82,63% ± 3,4% vs. 80,66% ± 3,89%; p=0,08, pero el cierre por epitelización fue significativamente mayor en el lado intervenido con ASCs (93,47% ± 5,98% vs. 79,88% ± 6,28%; p=0,0028. Todas las muestras obtuvieron tinción positiva para el anticuerpo anti-citoqueratina 34βE12 y el avance epitelial lineal cuantificado por microscopía resultó significativamente mayor en el lado con ASCs (6408 ± 275μm vs. 5375 ± 250μm; p < 0,001. Identificamos las células GFP positivas formando parte de la dermis regenerada, no así en la epidermis. En conclusión, las células troncales derivadas del tejido adiposo autólogo sembradas en una matriz de Integra® aumentan la formación epitelial significativamente

  9. Novel Methods for Measuring LiDAR

    Science.gov (United States)

    Ayrey, E.; Hayes, D. J.; Fraver, S.; Weiskittel, A.; Cook, B.; Kershaw, J.

    2017-12-01

    The estimation of forest biometrics from airborne LiDAR data has become invaluable for quantifying forest carbon stocks, forest and wildlife ecology research, and sustainable forest management. The area-based approach is arguably the most common method for developing enhanced forest inventories from LiDAR. It involves taking a series of vertical height measurements of the point cloud, then using those measurements with field measured data to develop predictive models. Unfortunately, there is considerable variation in methodology for collecting point cloud data, which can vary in pulse density, seasonality, canopy penetrability, and instrument specifications. Today there exists a wealth of public LiDAR data, however the variation in acquisition parameters makes forest inventory prediction by traditional means unreliable across the different datasets. The goal of this project is to test a series of novel point cloud measurements developed along a conceptual spectrum of human interpretability, and then to use the best measurements to develop regional enhanced forest inventories on Northern New England's and Atlantic Canada's public LiDAR. Similarly to a field-based inventory, individual tree crowns are being segmented, and summary statistics are being used as covariates. Established competition and structural indices are being generated using each tree's relationship to one another, whilst existing allometric equations are being used to estimate diameter and biomass of each tree measured in the LiDAR. Novel metrics measuring light interception, clusteredness, and rugosity are also being measured as predictors. On the other end of the human interpretability spectrum, convolutional neural networks are being employed to directly measure both the canopy height model, and the point clouds by scanning each using two and three dimensional kernals trained to identify features useful for predicting biological attributes such as biomass. Predictive models will be trained and

  10. Las playas de Quintana Roo: sus riesgos y vulnerabilidad.

    Directory of Open Access Journals (Sweden)

    Daniel Torruco Gómez

    2013-01-01

    Full Text Available Las playas son sistemas donde se ejercen presiones antrópicas y ambientales, en este estudio se analizaron sus condiciones bioeconómicas con la finalidad de obtener un modelo que permita determinar el grado de vulnerabilidad y la matriz de riesgo en las playas del Estado de Quintana Roo para un mejor uso sustentable. Se formularon matrices con registros biológicos y socioeconómicos obtenidos entre el 2009 y 2010 en temporadas de alto registro turístico, obteniendo 17 variables en 20 playas analizadas. La evaluación se efectuó con el modelo semiparamétrico del tipo KSIM con dos escenarios: uno sin control/restricción en el desarrollo costero y otro con las mismas características pero con decremento en demanda turística por baja calidad ambiental. Los resultados mostraron un marcado descenso en playas arenosas y costas rocosas. En el modelo se hace referencia a la importancia de los procesos de las playas y su interrelación con los factores biológicos, sociales y económicos más importantes, proporcionando una visión integral de todas las variables. Se recomienda incrementar el modelo dándole mayor envergadura, integrando a las instituciones que influyen en el control de las acciones en estas playas, lo que dará un mejor referente y monitoreo a corto, mediano y largo plazo.

  11. Composición del tejido vegetal y su relación con variables de crecimiento y niveles de nutrientes en el suelo en cultivos comerciales de menta (Mentha spicata L.

    Directory of Open Access Journals (Sweden)

    Pedraza Rafael

    2008-08-01

    Full Text Available

    El objetivo de este estudio fue determinar la composición química del tejido vegetal en menta y su relación con la concentración de nutrientes en el suelo. Se evaluaron parámetros de crecimiento y la concentración de elementos de la parte aérea de la planta al momento de la cosecha, en 35 cultivos comerciales ubicados en el departamento de Cundinamarca (Colombia. Paralelamente se determinaron las propiedades químicas del suelo en que crecían las plantas. La concentración de macroelementos en el tejido vegetal mostró el siguiente orden (% de materia seca: K (1,07-7,23 > N (1,57-4,74 > Ca (0,66-1,36 > P (0,24- 0,64 > Mg (0,14-0,60; para los microelementos (mg· kg-1 fue: Fe (89-596 > Mn (19-303 > Zn (47-134 > B (16-108 > Cu (8-13. No se encontraron relaciones significativas entre los nutrientes en el suelo y la planta que permitieran explicar las variables de crecimiento. Se presentaron correlaciones significativas entre Mg y P en el suelo y sus concentraciones en la planta (r=0,65** y 0,60*, respectivamente y del Mg en el suelo y el Mn en la planta (r=-0,60*. La mejor correlación se presentó entre la relación K/Mg en el suelo y el Mg en el tejido vegetal (r=-0,73**, poniendo de manifiesto el antagonismo entre ambos nutrientes y la importancia del balance catiónico K-Mg en el suelo. En general se puede afirmar que los suelos cultivados con menta no presentaron limitaciones en la disponibilidad de nutrientes, muy probablemente por el manejo intensivo de la fertilización.

  12. La construcción social de lo público como potencial regenerador en los tejidos desarticulados / The social construction of the public as a potential disarticulated tissue regenerator

    Directory of Open Access Journals (Sweden)

    Mariano Adrian Ferretti

    2014-09-01

    Full Text Available La expansión de la ciudad no debería ser el principal problema al momento de abordar el análisis de sus causas sino más bien el modo en que estas expansiones se producen en el territorio, es decir, los patrones físico espaciales y morfológicos del tejido en cuanto a la capacidad de ejercer de conectores entre los distintos fragmentos de ese crecimiento celular. El estudio cualitativo de la problemática que comporta la fractura de relaciones sociales y la ausencia de identificación y apropiación de los espacios comunitarios en los bordes de contacto entre tejidos desarticulados, compromete a las características de su forma física desde el análisis de la micro escala y permite un acercamiento a la comprensión de las realidades que intervienen en la construcción de lo público como condición necesaria para la legitimación de dichos espacios de contacto con el dominio de lo privado, de lo cerrado. The expansion of the city should not be the main problem when approaching the analysis of its causes but rather the way in which these expansions occur on the territory, namely, the physical spatial patterns and morphological urban fabric in terms of ability to act connectors between the different fragments of the cell growth. The qualitative study of the problem that involves the breaking of social relations and the lack of identification and appropriation of community spaces at the edges of contact between urban fabric disjointed, committed to the characteristics of their physical form from understanding the micro scale analysis and allows an approach to the understanding of the realities involved in the construction of the public as necessary to legitimize such spaces contacting the private domain of the closed condition.

  13. Caracterización de patrones bioclimáticos en tejidos urbanos residenciales

    Directory of Open Access Journals (Sweden)

    Luz Alicia Cárdenas Jirón

    2012-05-01

    Full Text Available El microclima urbano es la resultante de una interacción entre la morfología urbana y el medio ambiente; y su estudio importa porque determina las condiciones de confort térmico en los espacios exteriores a la vivienda y por tanto su uso. Se parte del supuesto que la evaluación energética del entorno urbano no se considera en la actividad proyectual de conjuntos habitacionales. Por ello, el objetivo principal de esta tesis fue investigar el comportamiento energético de tejidos urbanos residenciales contemporáneos, aplicado a dos modelos de habitar: la ciudad jardín y la ciudad de bloque. Se postuló que si a una configuración espacial dada, le corresponde un comportamiento energético singular, entonces sería posible descifrar un patrón morfo-climático. El urbanismo bioclimático enmarca el enfoque teórico de la discusión, y el trabajo de campo se situó en un barrio residencial del pericentro en la metrópolis de Santiago de Chile. El método de caso analizó las dos tipologías de tejidos e integró los parámetros bioclimáticos: temperatura del aire, humedad relativa, radiación solar, y vientos para evaluar su desempeño energético. Los resultados demostraron que el rendimiento energético de los tejidos urbanos variaba según la tipología y con ello fue posible descifrar un patrón bioclimático. Este conocimiento es aplicable a la planificación y al diseño urbano sostenible. Abstract: Urban microclimate is a result of interaction between urban morphology and environment at micro-scale. Its study relevance lies on thermal comfort in outdoor spaces so habitat. It is assumed that energy performance of urban surrounding is not considered at design stage of architectural project. Main purpose of current research was to study energy performance of residential urban fabric applied to two urbanized models: garden city and Corbusier city. Rationale was if spatial configuration influences energy performance then those models would

  14. Un tejido único Moche III del sitio Castillo de Santa: una escena de cosecha de yuca

    Directory of Open Access Journals (Sweden)

    2003-01-01

    Full Text Available UN TISSU UNIQUE MOCHE III DU SITE EL CASTILLO DE SANTA : UNE SCÈNE DE RÉCOLTE DE YUCCA. Les fouilles archéologiques effectuées sur la terrase Est du site El castillo en juillet 2002, dans la vallée de Santa, ont conduit à la découverte de la tombe d'un enfant enroulé dans plusieurs textiles. L'un de eux est unique et illustre une scène de récolte d'une plante identifiée comme étant le manioc ou yucca. Le contexte archéologique indique un enterrement datant de la phase Moche III si on considère le contenu des remplissages entre les planchers sous et audessous de la tombe. Le textile est décrit dans son contexte et une discussion sur sa nature et les implications de son implications de son message sur l'économie Moche est amorcée Durante el mes de julio de la temporada 2002 en la terraza este del sitio El Castillo de Santa, encontramos la tumba de un niño envuelto con varios tejidos. Uno de ellos es único e ilustra una escena de cosecha de un planta identificada como la mandioca o yuca. El contexto arqueológico indica que se trata de un entierro fechado para la fase Moche III, basado en el contenido de los rellenos entre los pisos ubicados arriba y debajo de la tumba. Se describe el tejido en su contexto y se discute sobre su naturaleza y las implicancias en la economía Moche A UNIQUE MOCHE III TEXTILE FROM EL CASTILLO SITE OF SANTA: A HARVEST SCENE OF YUCCA. Archeological fieldwork carried out un July 2002 on terrace East at El Castillo site, Santa Valley, resulted in the discovery of a child burial wrapped in many textiles. One of them is unique. It represents a harvest scene of the plant identified as the manioc or yucca. The archeological context indicates a Moche III date for the burial based of the content of the fill between plastered clay floors from over and under the tomb. Description of the textile's context it followed by a discussion of its nature and possible implications on Moche economy

  15. Cuantificación del factor de crecimiento similar a la insulina (IGF-1) total en tejidos de rata

    OpenAIRE

    Elizabeth Rico; Myriam Sánchez de Gómez

    1998-01-01

    Se establecieron los contenidos totales de IGF-I en algunos tejidos de rata adulta normal (hígado, riñón, corazón, pulmón, timo, bazo y músculo esquelético) por medio de radioinmunoanálisis (RIA) específico. La efectividad de la extracción ácido-etanólica (AE), corrientemente empleada para eliminar la interferencia de las proteínas de unión del IGF-I (IGFBPs) en el análisis del factor en suero, se evaluó para las muestras de tejidos y se comparó con la extracción AE seguida de crioprecipitaci...

  16. Sustitutos cutáneos desarrollados por ingeniería de tejidos = Skin substitutes developed by tissue engineering

    Directory of Open Access Journals (Sweden)

    Arenas Gómez, Claudia Marcela

    2012-01-01

    Full Text Available La piel es un tejido complejo vulnerable a procesos que alteran su estructura, integridad y funcionalidad como, por ejemplo, quemaduras, heridas crónicas y diversas enfermedades congénitas. Los avances tecnológicos en la fabricación de biomateriales y en el cultivo de células han permitido la producción de sustitutos cutáneos que han sido una alternativa terapéutica para algunas de estas complicaciones. Esta revisión pretende actualizar los aspectos generales, composición, perspectivas futuras y de aplicación de los principales sustitutos cutáneos que se ofrecen actualmente en el mercado internacional. Igualmente, presentará algunas experiencias del Grupo de Ingeniería de Tejidos y Terapias Celulares (GITTC de la Facultad de Medicina de la Universidad de Antioquia.

  17. Las netbooks en el hogar: análisis de las representaciones y prácticas que realizan los estudiantes y sus familias sobre las netbooks del Programa Conectar Igualdad

    OpenAIRE

    Módena, Lucía

    2013-01-01

    El objetivo principal de la investigación fue analizar las representaciones y prácticas sociales que un grupo de estudiantes y sus familias construyeron sobre las netbooks del Programa Conectar Igualdad para dar cuenta de la producción de sentidos que hacían sobre las Tecnologías de la Información y la Comunicación (TICs) y sobre esta política pública. Para ello fue fundamental identificar las experiencias de las familias, sus percepciones y sus trayectorias de uso de las TICs en relación a l...

  18. Diseño de un plan para el mejoramiento de la productividad caso Empresa Nathaly Tejidos

    OpenAIRE

    Cedeño Zambrano, Alejandra Yadira; Sosa Paredes, Mercedes de Jesús

    2015-01-01

    In the textile market is important to consider strategic tools that are related to the efficiency of processes and basically lies in the methodology that provides lean manufacturing. Given this background, the purpose of this case study is to suggest the factory Nathaly Tejidos, designing a plan for improving productivity, based on the methodology of lean manufacturing in order to contribute to continuous improvement in its processes productive, achieving higher levels of quality, reducing...

  19. Efecto de la malnutrición fetal sobre los tejidos dentarios

    Directory of Open Access Journals (Sweden)

    Ailín Bello Pérez

    1997-12-01

    Full Text Available Se realizó un estudio transversal en 200 niños nacidos en el Hospital Ginecoobstétrico Docente "Mariana Grajales", de la ciudad de Santa Clara, durante los años 1988 y 1989, de los cuales 100 eran malnutridos fetales y 100 tenían un crecimiento normal, con el objetivo de evaluar la influencia del factor nutricional en la calidad y textura de los tejidos dentarios. Se comprobó la alta incidencia de hipoplasias de esmalte en los niños que sufrieron la malnutrición, de igual forma se comportó la prevalencia de caries dental, todo lo cual revela el papel decisivo de la nutrición en la formación dentaria.A cross-sectional study of 200 children who were born at the "Mariana Grajales" Gynecoobstetric Teaching Hospital, in the city of Santa Clara, from 1988 to 1989, was conducted aimed at evaluating the influence of the nutritional factor on the quality and texture of dental tissues. 100 of them were fetal malnourished and the rest had a normal growth. It was observed a high incidence of dental hypoplasias in children who suffered from malnutrition, as well as a high prevalence of dental caries, which reveals the decesive role of nutrition in dental formation.

  20. 2004 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Portland, Oregon

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The all returns ASCII files contain the X,Y,Z values of all the LiDAR returns collected during the survey mission. In addition each return also has a time stamp,...

  1. Cuantificación del factor de crecimiento similar a la insulina (IGF-1 total en tejidos de rata

    Directory of Open Access Journals (Sweden)

    Elizabeth Rico

    1998-06-01

    Full Text Available Se establecieron los contenidos totales de IGF-I en algunos tejidos de rata adulta normal (hígado, riñón, corazón, pulmón, timo, bazo y músculo esquelético por medio de radioinmunoanálisis (RIA específico. La efectividad de la extracción ácido-etanólica (AE, corrientemente empleada para eliminar la interferencia de las proteínas de unión del IGF-I (IGFBPs en el análisis del factor en suero, se evaluó para las muestras de tejidos y se comparó con la extracción AE seguida de crioprecipitación (AEC. Los resultados mostraron que la extracción AE no permite remover completamente las IGFBPs y que con el paso adicional de crioprecipitación se libera aproximadamente 20% más de IGF-I de los tejidos. Finalmente, por medio de RIA se estableció la distribución tisular de este factor de crecimiento en rata. El método aquí descrito puede aplicarse en estudios de regulación metabólica o nutricional del IGF-l.

  2. Liquid waste management: The case of Bahir Dar, Ethiopia ...

    African Journals Online (AJOL)

    Background: Human beings pollute the environment with their industrial and domestic wastes. In Bahir Dar Town there is no conventional municipal waste water collection and treatment system. Objective: The aim of this study was to describe the liquid waste disposal practices of the residents of Bahir Dar Town and to ...

  3. Analysis of inflow parameters using LiDARs

    NARCIS (Netherlands)

    Giyanani, A.H.; Bierbooms, W.A.A.M.; Van Bussel, G.J.W.

    2014-01-01

    Remote sensing of the atmospheric variables with the use of LiDAR is a relatively new technique for wind resource assessment and oncoming wind prediction in wind energy. The validation of LiDAR measurements and comparisons with other sensing elements thus, is of high importance for further

  4. 'Dar' + gerund in Ecuadorian Highland Spanish: contact-induced grammaticalization?

    NARCIS (Netherlands)

    Olbertz, H.

    2008-01-01

    The benefactive construction dar + gerund is used in the North Andean region only and is unknown elsewhere in the Spanish-speaking world. Based on the analysis of spontaneous data from Ecuadorian Highland Spanish, this paper provides a linguististic description of dar + gerund and of the social and

  5. 2006 OSIP OGRIP: Upland Counties LiDAR Survey

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The 2006 OSIP digital LiDAR data was collected during the months of March and May (leaf-off conditions). The LiDAR covers the entire land area of the northern tier...

  6. Assessing LiDAR elevation data for KDOT applications.

    Science.gov (United States)

    2013-02-01

    LiDAR-based elevation surveys are a cost-effective means for mapping topography over large areas. LiDAR : surveys use an airplane-mounted or ground-based laser radar unit to scan terrain. Post-processing techniques are : applied to remove vegetation ...

  7. Injerto de tejido conectivo en recesión gingival de incisivo

    Directory of Open Access Journals (Sweden)

    Luis Fang Mercado

    2013-10-01

    Full Text Available ResumenLa recesión gingival es definida como la ubicación del margen gingival apical a la unión amelocementaria de uno o más dientes. Esta deformidad apical ocasiona generalmente sensibilidad radicular, pobre apariencia estética y lesiones cervicales cariosas por lo que los pacientes pueden preguntar de manera frecuente a los clínicos por procedimientos de recubrimiento radicular. Existen dos grandes grupos de causas de recesión gingival, las que se originan de enfermedad periodontal y de origen traumático, además, se consideran ciertos factores y se les clasifica como factores predisponentes y precipitantes desencadenantes. Patológicamente las recesiones gingivales están ocasionadas por la destrucción de tejido conectivo de la encía, lo cual ocasiona una disminución del flujo sanguíneo a nivel gingival. Se desarrollan varias técnicas con el mismo fin, dentro de estas están el colgajo pediculado, injerto gingival libre, injerto de tejido conectivo y la regeneración tisular guiada. Las condiciones de éxito en el tratamiento de las recesiones gingivales, descansan en el conocimiento de su etiología y de las posibilidades de cicatrización de acuerdo a las diferentes técnicas quirúrgicas consideradas para corregirlas. Los objetivos a considerar en el tratamiento de las recesiones son: mejorar la estética, recubrir las zonas radiculares expuestas y lograr estabilidad clínica. Se presenta un caso clínico donde se utilizó el enfoque del injerto de conectivo subpediculado en un diente único para crear encía adherida y a la vez intentar cubrir una recesión en diente inferior anterior. (DUAZARY 2011 No. 2, 206 - 212.AbstractGingival recession is defined as the location of gingival margin apical to the CEJ one or more teeth. This deformity causes apical usually root sensitivity, poor appearance aesthetics and carious cervical lesions so that Patients may wonder procedures root coverage. There are two main groups causes of

  8. Desempeño de las empresas propiedad de sus trabajadores: ¿Un modelo de gobierno corporativo laboral?

    Directory of Open Access Journals (Sweden)

    Josefina Fernández-Guadaño

    2016-03-01

    Full Text Available En épocas de crisis, las empresas propiedad de sus trabajadores despiertan un renovado interés como fórmulas para el mantenimiento del empleo y sostenibilidad del tejido productivo del entorno donde se ubican. También hay un interés creciente en la literatura económica por medir el desempeño empresarial e inferir, a partir de las posibles diferencias, pautas que permitan incrementar la eficiencia, competitividad y productividad empresarial. Por ambos motivos este trabajo analiza el desempeño medido a través de diferentes indicadores económicos de las empresas propiedad de sus trabajadores y compara los resultados con los obtenidos por las empresas capitalistas convencionales. Estos resultados constatan diferencias significativas en diversas variables económico-financieras congruentes con las diferentes estructuras de propiedad del capital de ambas formas societarias, pero que no son determinantes para abogar por un modelo de gobierno corporativo laboral.

  9. Object Classification Using Airborne Multispectral LiDAR Data

    Directory of Open Access Journals (Sweden)

    PAN Suoyan

    2018-02-01

    Full Text Available Airborne multispectral LiDAR system,which obtains surface geometry and spectral data of objects,simultaneously,has become a fast effective,large-scale spatial data acquisition method.Multispectral LiDAR data are characteristics of completeness and consistency of spectrum and spatial geometric information.Support vector machine (SVM,a machine learning method,is capable of classifying objects based on small samples.Therefore,by means of SVM,this paper performs land cover classification using multispectral LiDAR data. First,all independent point cloud with different wavelengths are merged into a single point cloud,where each pixel contains the three-wavelength spectral information.Next,the merged point cloud is converted into range and intensity images.Finally,land-cover classification is performed by means of SVM.All experiments were conducted on the Optech Titan multispectral LiDAR data,containing three individual point cloud collected by 532 nm,1024 nm,and 1550 nm laser beams.Experimental results demonstrate that ①compared to traditional single-wavelength LiDAR data,multispectral LiDAR data provide a promising solution to land use and land cover applications;②SVM is a feasible method for land cover classification of multispectral LiDAR data.

  10. Processing LiDAR Data to Predict Natural Hazards

    Science.gov (United States)

    Fairweather, Ian; Crabtree, Robert; Hager, Stacey

    2008-01-01

    ELF-Base and ELF-Hazards (wherein 'ELF' signifies 'Extract LiDAR Features' and 'LiDAR' signifies 'light detection and ranging') are developmental software modules for processing remote-sensing LiDAR data to identify past natural hazards (principally, landslides) and predict future ones. ELF-Base processes raw LiDAR data, including LiDAR intensity data that are often ignored in other software, to create digital terrain models (DTMs) and digital feature models (DFMs) with sub-meter accuracy. ELF-Hazards fuses raw LiDAR data, data from multispectral and hyperspectral optical images, and DTMs and DFMs generated by ELF-Base to generate hazard risk maps. Advanced algorithms in these software modules include line-enhancement and edge-detection algorithms, surface-characterization algorithms, and algorithms that implement innovative data-fusion techniques. The line-extraction and edge-detection algorithms enable users to locate such features as faults and landslide headwall scarps. Also implemented in this software are improved methodologies for identification and mapping of past landslide events by use of (1) accurate, ELF-derived surface characterizations and (2) three LiDAR/optical-data-fusion techniques: post-classification data fusion, maximum-likelihood estimation modeling, and hierarchical within-class discrimination. This software is expected to enable faster, more accurate forecasting of natural hazards than has previously been possible.

  11. Características de nuevos cultivos celulares derivados de tejidos embrionarios de Aedes aegypti (Diptera: Culicidae.

    Directory of Open Access Journals (Sweden)

    Ariosto Ardila

    2005-03-01

    Full Text Available Introducción. Los cultivos celulares de insectos son una metodología útil en estudios biomédicos y tecnológicos. Objetivo. El propósito principal del presente trabajo fue obtener y caracterizar cultivos celulares derivados de tejidos embrionarios de Aedes aegypti. Materiales y métodos. Se emplearon huevos embrionados para los explantes de tejidos en los medios de cultivos MM/VP12 y L-15/Grace, con suplemento de 20% de suero fetal bovino y una mezcla al 1% de antibiótico y antimicótico, con un rango de pH entre 6,8 y 7,0. Los cultivos se incubaron a una temperatura de 28oC sin atmósfera de CO . Resultados. El crecimiento celular se obtuvo en el medio L-15/Grace, 3 semanas después de haber sido sembrados los tejidos embrionarios; sin embargo, se necesitaron 6 meses para la formación de la monocapa confluente. Desde agosto de 2003 hasta junio de 2004, se habían realizado 28 subcultivos. Las células se caracterizaron morfológicamente; predominaron las formas epitelioides en subcultivos de pases altos. También se reconocieron las particularidades morfométricas del cariotipo y, además, se determinaron los perfiles isoenzimáticos y moleculares de los cultivos celulares, los cuales se compararon con muestras de adultos de la especie tomadas de la misma colonia y con líneas celulares derivadas de otros insectos. Discusión. Estas células representan, potencialmente, un importante sistema in vitro en investigaciones básicas y aplicadas.

  12. Anatomía del tejido fotosintético de diez taxa de Opuntia establecidos en el secano árido mediterráneo de Chile Anatomy of the photosynthetic tissue in ten taxa of Opuntia established to the mediterranean arid zone of Chile

    Directory of Open Access Journals (Sweden)

    SILVA HERMAN

    2001-06-01

    Full Text Available Se evaluó el efecto de la exposición de cladodios a la radiación en la anatomía del tejido fotosintético de 10 taxa de Opuntia, (plantas con metabolismo ácido crasuláceo, CAM establecidos en al secano árido de la IV Región de Chile. A nivel del tejido epidérmico se evaluó el grosor de la cutícula, la densidad de estomas y las dimensiones de células oclusivas. En el tejido fotosintetico, se evaluo las dimensiones celulares con el objeto de estimar la superficie de paredes celulares expuestas al intercambio gaseoso por unidad de tejido fotosintético, relación conocida como Ames/A. Los resultados señalan grandes dimensiones celulares y baja densidad estomática, lo que determina un número reducido de estomas por unidad de superficie en relación a especies de otras vías metabólicas (C3 y C4. La comparación entre taxones, muestra diferencias significativas en la relación de áreas Ames/A, parámetro estrechamente relacionado a la capacidad fotosintética. Estas características anatómicas y sus modificaciones en combinación con el metabolismo CAM, contribuyen a su adaptación a condiciones de pluviometría limitadaThe anatomy of the photosynthetic tissue and the effect of cladode exposure to radiation was studied in ten taxa of Opuntia, plants with crassulacean acid metabolism (CAM, established in the dry lands of the IV Region of Chile. At the epidermic level the cuticle thickness, stomatal frequency, and dimension of guard cells were evaluated. In the photosynthetic tissue, cell dimensions were determined in order to estimate the area of cell walls exposed to gaseous exchange per unit of photosynthetic tissue (A mes/ A. The results indicate large cell dimensions and low stomata frequency which results in a reduced number of stomata per unit area in relation to species with other metabolic pathways (C3 and C4, The comparison between taxa shows significant differences in the relation of Ames/A areas, a parameter closely

  13. El grafeno y sus propiedades especiales

    OpenAIRE

    F. Guinea

    2011-01-01

    El grafeno, formado por una capa de átomos de carbono, es un nuevo material con interesantes propiedades, desde un punto de vista fundamental, y también por sus posibles aplicaciones. Se describen algunas de estas propiedades, y se discuten algunos avances recientes en la investigación en este material.

  14. Biosíntesis de carotenoides en "Escherichia coli" y en tejidos no fotosintéticos de "Arabidopsis thaliana"

    OpenAIRE

    Rodríguez Villalón, Antía

    2010-01-01

    Los carotenoides son pigmentos de naturaleza isoprenoide presentes en todo tipo de organismos fotosintéticos y en algunos no fotosintéticos. En plantas, los carotenoides se sintetizan en todo tipo de plastos y se encuentran en grandes cantidades en cloroplastos (donde desempeñan una función esencial para la planta de fotoprotección) y cromoplastos de flores y frutos. Por el contrario, en los plastos de tejidos no fotosintéticos como aquellos de plantas crecidas en la oscuridad (etioplastos) y...

  15. Aumento de dorso nasal con implante blando de tejido conectivo laxo y cartílago troce

    OpenAIRE

    Vásquez-García, Mariana; Salcedo-Orellana, Víctor

    2017-01-01

    Introducción y Objetivo: Están descritas innumerables técnicas para el aumento del dorso nasal. Los injertos autólogos son el material preferido en la reconstrucción nasal debido a su biocompatibilidad y a su menor riesgo de infección y exposición. La técnica de cartílago troceado envuelto en fascia temporal se ha popularizado porque evita la visualización de los injertos a través de la piel del dorso nasal. Nuestro estudio tiene como objetivo demostrar que también el tejido conectivo laxo re...

  16. TENSOR MODELING BASED FOR AIRBORNE LiDAR DATA CLASSIFICATION

    Directory of Open Access Journals (Sweden)

    N. Li

    2016-06-01

    Full Text Available Feature selection and description is a key factor in classification of Earth observation data. In this paper a classification method based on tensor decomposition is proposed. First, multiple features are extracted from raw LiDAR point cloud, and raster LiDAR images are derived by accumulating features or the “raw” data attributes. Then, the feature rasters of LiDAR data are stored as a tensor, and tensor decomposition is used to select component features. This tensor representation could keep the initial spatial structure and insure the consideration of the neighborhood. Based on a small number of component features a k nearest neighborhood classification is applied.

  17. LiDAR error estimation with WAsP engineering

    DEFF Research Database (Denmark)

    Bingöl, Ferhat; Mann, Jakob; Foussekis, D.

    2008-01-01

    The LiDAR measurements, vertical wind profile in any height between 10 to 150m, are based on assumption that the measured wind is a product of a homogenous wind. In reality there are many factors affecting the wind on each measurement point which the terrain plays the main role. To model Li......DAR measurements and predict possible error in different wind directions for a certain terrain we have analyzed two experiment data sets from Greece. In both sites LiDAR and met. mast data have been collected and the same conditions are simulated with Riso/DTU software, WAsP Engineering 2.0. Finally measurement...

  18. De las Otras al No(sotras: encuentros, tensiones y retos en el tejido de articulaciones entre colectivos de mujeres migradas y feministas locales en el País Vasco

    Directory of Open Access Journals (Sweden)

    Gandarías Goikoetxea, Itziar

    2013-06-01

    Full Text Available Las fracturas generadas por la actual transformación geopolítica constituye nuevas clases de servidumbre de género que cristalizan con violencia en determinadas corporeidades; unas servidumbres que interpelan las lecturas feministas de la realidad y que demandan de renovados tejidos y texturas feministas para actuar y analizar frente a estas configuraciones. Bajo el trasfondo de las recientes perspectivas interseccionales y post-coloniales, este texto explora las experiencias, dificultades y posibilidades de articulación entre posiciones de sujeto marcadas y producidas dentro del actual contexto post-colonial. A partir de producciones narrativas con colectivos de mujeres migradas, autóctonas y/o feministas, se identifican los actuales y potenciales puntos de articulación y tensión entre sus prácticas y proyectos de acción política; narraciones que ofrecen escenarios de articulaciones posibles que permiten un desplazamiento de fronteras y ejes de diferenciación entre posiciones marcadas geopolíticamente a nivel global y subjetivadas localmente por discursos post-coloniales.

  19. Enfermedades bacterianas del periodonto y tejidos adyacentes en el paciente portador de SIDA

    Directory of Open Access Journals (Sweden)

    Elena Morán López

    2001-08-01

    Full Text Available El Síndrome de Inmunodeficiencia Adquirida (SIDA es una de las enfermedades más devastadoras del sistema inmune del hombre. En la cavidad bucal de estos pacientes se observan formas no comunes de enfermedades periodontales y gingivales parecidas a la GUNA, presentan dolores agudos, encías hiperémicas, hemorragias espontáneas y una rápida progresión de la enfermedad que causa extensa destrucción de tejidos blandos y óseos. La importancia clínica de esta condición es que está asociada con una supresión severa del sistema inmune con recuento celular de CD4 por debajo de 100 células/mm3. Resulta necesario que todo estomatólogo conozca las manifestaciones bucales del SIDA para ayudar al diagnóstico y tratamiento de estos pacientes y evitar convertirse en portadores y a la vez trasmisores de esta epidemia, que a diferencia de las demás, es en gran medida prevenible, más aún, cuando la responsabilidad de su prevención recae no sólo sobre las autoridades sanitarias del país, sino también y fundamentalmente, sobre todas las personas.Acquired Immunodeficiency Syndrome is one of the most devastating diseases for the man´s immune system. In the oral cavity of these patients, we may observe uncommon forms of GUNA-like periodontal and gingival diseases, acute pain, hypernemic gums, spontaneous hemorrhage and rapid development of the disease that cause extensive damage to soft and bone tissues. The clinical importance of this condition lies in its linking with a severe suppression of the immune system, with a CD4 cell count under 100 cell/mm3. It is necessary that every dentist recognize the oral manifestations of AIDS in order to assist in the diagnosis and treatment of these patients and to avoid becoming both carriers and transmitters of thes epidemic that, unlike the others, is preventable to a great extent because the responsability for its prevention falls not only on the sanitary authorities but also on every person fundamentally.

  20. EL PROTEOMA DEL TEJIDO ADIPOSO SUBCUTÁNEO MUESTRA HETEROGENEIDAD ANATÓMICA

    Science.gov (United States)

    Martos-Moreno, G.A.; Sackmann-Sala, L.; Berryman, D.E.; Blome, D.W.; Argente, J.; Kopchick, y J.J.

    2015-01-01

    Introducción El tejido adiposo blanco (TAB) subcutáneo (Sc) humano podría variar dependiendo de su localización anatómica, con diferencias en su perfil proteómico. Pacientes y métodos Se obtuvieron aspirados de TAB-Sc de seis mujeres con IMC >25 kg/m2, sometidas a liposucción. Dicho TAB-Sc se obtuvo de seis localizaciones anatómicas: abdominal superior e inferior, muslo, dorsal, flanco y cadera, analizándose su perfil proteómico mediante electroforesis bidimensional. En muslo y abdomen superior se compararon, además, las muestras obtenidas de las dos capas del TAB-Sc (profunda y superficial). Resultados Se detectaron 21 proteínas que mostraban una intensidad de expresión diferente entre las seis localizaciones anatómicas y 14 entre las capas superficial y profunda de una misma región. Entre las proteínas identificadas se incluyen: vimentina (proteína estructural); proteínas “heat-shock” (HSPs), superóxido-dismutasa, (estrés/chaperoninas); proteína fijadora de ácidos grasos 4 (FABP-4) y alfa-enolasa (metabolismo lipídico y de los hidratos de carbono, respectivamente) y ATP-sintetasa (producción de energía). Entre las regiones estudiadas, el TAB-Sc dorsal mostraba un perfil proteómico particular, con menor expresión de proteínas implicadas en la producción de energía y metabolismo (ATP-sintetasa, alfa-enolasa, HSPs y FABP-4) que el resto de regiones. Conclusiones Los niveles de expresión de diversas proteínas en el TAB-Sc humano no son homogéneos, difiriendo entre localizaciones anatómicas. Esto sugiere la existencia de diferencias funcionales en el TAB-Sc de acuerdo con su localización anatómica, lo que debe considerarse antes de asumir la extrapolación de los datos derivados del TAB-Sc de una determinada localización al de otras partes de la anatomía. PMID:23228439

  1. Turismo de reuniones en la ciudad de Murcia. Un enfoque desde el tejido empresarial involucrado

    OpenAIRE

    Ponce Sánchez, María Dolores

    2007-01-01

    La importancia y dinamismo del turismo de reuniones en el contexto nacional e internacional nos conduce a analizar la capacidad de la ciudad de Murcia para afrontar los retos continuos que le presenta un mercado tan globalizado y competitivo como el actual. Por tanto, esta investigación presenta una aproximación a la situación de la actividad en la ciudad, desde la visión particular de sus beneficiarios directos, empresarios asociados a Murcia Convention Bureau (Oficina de Cong...

  2. Elevation - LiDAR Survey Minnehaha Creek, MN Watershed

    Data.gov (United States)

    Army Corps of Engineers, Department of the Army, Department of Defense — LiDAR Bare-Earth Grid - Minnehaha Creek Watershed District. The Minnehaha Creek watershed is located primarily in Hennepin County, Minnesota. The watershed covers...

  3. 2009 PSLC-USGS Topographic LiDAR: Wenatchee

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WS) collected Light Detection and Ranging (LiDAR) data of the Wenatchee USGS area of interest (AOI) east of Wenatchee, WA on May 1nd - May...

  4. Intussusception in children seen at Muhimbili National Hospital, Dar ...

    African Journals Online (AJOL)

    Intussusception in children seen at Muhimbili National Hospital, Dar es salaam. ... its magnitude of concern and any seasonal variation in our environment. ... majority of the children present late, >48 hours from the onset of symptoms and ...

  5. Patient Satisfaction At The Muhimbili National Hospital In Dar Es ...

    African Journals Online (AJOL)

    Patient Satisfaction At The Muhimbili National Hospital In Dar Es Salaam, Tanzania. ... staffpatient relationship ethos, in which the patient is a viewed as a customer. Keywords: patient satisfaction, reform, Muhimbili National Hospital, referral ...

  6. LiDAR (Terrain), THURSTON COUNTY, WASHINGTON, USA

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Fugro EarthData Company furnished the collection, processing, and development of LiDAR for 825 square miles in Washington (805 square miles of Thurston County and 20...

  7. OBTENCIÓN DE CÉLULAS MADRE DEL TEJIDO ADIPOSO Y SU POTENCIAL DE DIFERENCIACIÓN OSTEOGÉNICO

    OpenAIRE

    Pineda Molina, Catalina; Londoño Peláez, Carolina

    2009-01-01

    El tejido adiposo es una de las principales fuentes de células madre de fácil obtención y con alto potencial de diferenciación hacia linajes celulares especializados. Con el objetivo de estandarizar la obtención de estas células y dirigir su diferenciación hacia el linaje osteogénico, se utilizó tejido adiposo procedente de liposucción y de abdominoplastia. Se aplicaron métodos de disgregación mecánica y enzimática del tejido para obtener las células. La morfología celular obtenida fue simila...

  8. Obtención de células madre del tejido adiposo y su potencial de diferenciación ontogénico

    OpenAIRE

    Pineda-Molina, C. (Catalina); Londoño-Peláez, C. (Carolina)

    2009-01-01

    El tejido adiposo es una de las principales fuentes de células madre de fácil obtención y con alto potencial de diferenciación hacia linajes celulares especializados. Con el objetivo de estandarizar la obtención de estas células y dirigir su diferenciación hacia el linaje osteogénico, se utilizó tejido adiposo procedente de liposucción y de abdominoplastia. Se aplicaron métodos de disgregación mecánica y enzimática del tejido para obtener las células. La morfología celular obtenida f...

  9. Shipborne LiDAR system for coastal change monitoring

    Science.gov (United States)

    Kim, chang hwan; Park, chang hong; Kim, hyun wook; hyuck Kim, won; Lee, myoung hoon; Park, hyeon yeong

    2016-04-01

    Coastal areas, used as human utilization areas like leisure space, medical care, ports and power plants, etc., are regions that are continuously changing and interconnected with oceans and land and the sea level has risen by about 8cm (1.9mm / yr) due to global warming from 1964 year to 2006 year in Korea. Coastal erosion due to sea-level rise has caused the problem of marine ecosystems and loss of tourism resources, etc. Regular monitoring of coastal erosion is essential at key locations with such volatility. But the survey method of land mobile LiDAR (light detection and ranging) system has much time consuming and many restrictions. For effective monitoring beach erosion, KIOST (Korea Institute of Ocean Science & Technology) has constructed a shipborne mobile LiDAR system. The shipborne mobile LiDAR system comprised a land mobile LiDAR (RIEGL LMS-420i), an INS (inertial navigation system, MAGUS Inertial+), a RTKGPS (LEICA GS15 GS25), and a fixed platform. The shipborne mobile LiDAR system is much more effective than a land mobile LiDAR system in the measuring of fore shore areas without shadow zone. Because the vessel with the shipborne mobile LiDAR system is continuously moved along the shoreline, it is possible to efficiently survey a large area in a relatively short time. Effective monitoring of the changes using the constructed shipborne mobile LiDAR system for seriously eroded coastal areas will be able to contribute to coastal erosion management and response.

  10. Upgrading transmission lines with aerial LiDAR technology

    Energy Technology Data Exchange (ETDEWEB)

    Koop, J.E. [Manitoba Hydro, Winnipeg, MB (Canada)

    2003-04-01

    LiDAR (Light Detection and Ranging) technology is described as an example of techniques used by hydro companies to increase their capacity with existing plants, and within tight budget constraints. LiDAR was chosen by Manitoba Hydro primarily because LiDAR's data collection method offers very fast turn-around time from collection to delivery, and most importantly because of LiDAR's highly accurate ability to map terrain and wire catenary shape in every span. The article describes a case study of the 'Nip and Tuck' method of wire re-tensioning based on LiDAR data, which was used by Manitoba Hydro to create a computer model of Saskatchewan Hydro's transmission line capacity on its 138 kV transmission line between Saskatoon and North Battleford. The model was needed to analyze the existing line conditions in an effort to minimize cascading failures on the 40-year old line. Using the 'Nip and Tuck' technology in combination with LiDAR, SaskPower engineers were able to complete the required modifications to raise transmission wire operating temperatures on the 135 km long line to 66 degree C in only 36 days, and at a cost that was 80 per cent less than the cost would have been using conventional techniques ($232,000 instead of the estimated $1.25 million).

  11. Altavoces y Sus Caracter?sticas.

    OpenAIRE

    Cabrera Ortiz, Juan Gabriel

    2015-01-01

    El contenido de aprendizaje aborda la definici?n de los altavoces desde el campo electroac?stico relacionando su principio de funcionamiento mec?nico el?ctrico y sus caracter?sticas mas importantes como lo son su tipo, respuesta en frecuencia, impedancia, sensibilidad y patr?n polar. Contenido realizado por el docente de la Escuela de Ciencias B?sicas Tecnolog?a e Ingenier?a Ing. Juan G. Cabrera O.

  12. Estudio del quitosano como biomaterial portador de rhBMP-2: desarrollo, caracterización y aplicabilidad en regeneración de tejido óseo

    OpenAIRE

    Abarrategi López, Ander

    2008-01-01

    La ingeniería de tejidos es un campo de investigación emergente y profundamente multidisciplinar. En esencia, esta disciplina busca nuevas terapias que permitan obtener tejido vivo y funcional, mediante un soporte activo, células y factores diferenciadores. En este contexto, el objetivo de este trabajo es aportar propiedades osteoinductivas a materiales implantables de uso clínico. Puesto que la rhBMP-2 es el factor osteodiferenciador más conocido, ésta proteína se sintetizó en el laboratorio...

  13. Proliferación de células madres mesenquimales obtenidas de tejido gingival humano sobre una matriz de quitosano: estudio in vitro

    OpenAIRE

    Hernández,B M; Inostroza,V C; Carrión,A F; Chaparro,P A; Quintero,H A; Sanz,R A

    2011-01-01

    Objetivo: Comprobar la proliferación de células madres mesenquimales (MSCs) provenientes de tejido conjuntivo gingival humano sobre una matriz de quitosano. Método: Estudio experimental in vitro en el cual se aislaron MSCs a partir de cultivos por explante de tejido conjuntivo gingival. La presencia de MSCs, se caracterizó mediante citometría de flujo, utilizando para ello anticuerpos CD34, CD45, CD73, CD90, CD105, diferenciación hacia tres linajes celulares: adipocitos, osteoblastos y condro...

  14. Estudio de biocompatibilidad de polímeros sintéticos y su aplicación en ingeniería de tejido óseo

    OpenAIRE

    Fernández, Juan Manuel

    2011-01-01

    El tejido óseo es el único capaz de repararse por sí mismo sin dejar cicatrices. Sin embargo, existen algunas afecciones, como las grandes fracturas o las osteonecrosis, en las que el tejido óseo no puede repararse. A lo largo de la historia de la humanidad, se han diseñado distintas estrategias para reparar el hueso dañado. Las terapias usadas en la actualidad, como los injertos o implantes, tienen varias desventajas, como la baja disponibilidad de dadores de injertos, problemas de osteointe...

  15. 2012-2013 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Hoh River Watershed, Washington (Deliveries 1 and 2)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data on the Hoh River watershed survey area for the Puget Sound LiDAR Consortium and the...

  16. 2006 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Eastern Washington and River Corridors

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WS) collected Light Detection and Ranging (LiDAR) data in eastern Washington, eastern Oregon, and southern Canada in October and November,...

  17. 2012 Puget Sound LiDAR Consortium (PSLC) Topographic LiDAR: Chehalis River Watershed Area, Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data for the Chehalis River Watershed study area on January 28th, February 2nd-7th,...

  18. 2002 Puget Sound LiDAR Consortium (PSLC) Unclassified Topographic LiDAR: Puget Sound Lowlands Washington

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TerraPoint surveyed and created this data for the Puget Sound LiDAR Consortium under contract. The area surveyed is approximately 730 square miles and covers the...

  19. LiDAR Vegetation Investigation and Signature Analysis System (LVISA)

    Science.gov (United States)

    Höfle, Bernhard; Koenig, Kristina; Griesbaum, Luisa; Kiefer, Andreas; Hämmerle, Martin; Eitel, Jan; Koma, Zsófia

    2015-04-01

    Our physical environment undergoes constant changes in space and time with strongly varying triggers, frequencies, and magnitudes. Monitoring these environmental changes is crucial to improve our scientific understanding of complex human-environmental interactions and helps us to respond to environmental change by adaptation or mitigation. The three-dimensional (3D) description of the Earth surface features and the detailed monitoring of surface processes using 3D spatial data have gained increasing attention within the last decades, such as in climate change research (e.g., glacier retreat), carbon sequestration (e.g., forest biomass monitoring), precision agriculture and natural hazard management. In all those areas, 3D data have helped to improve our process understanding by allowing quantifying the structural properties of earth surface features and their changes over time. This advancement has been fostered by technological developments and increased availability of 3D sensing systems. In particular, LiDAR (light detection and ranging) technology, also referred to as laser scanning, has made significant progress and has evolved into an operational tool in environmental research and geosciences. The main result of LiDAR measurements is a highly spatially resolved 3D point cloud. Each point within the LiDAR point cloud has a XYZ coordinate associated with it and often additional information such as the strength of the returned backscatter. The point cloud provided by LiDAR contains rich geospatial, structural, and potentially biochemical information about the surveyed objects. To deal with the inherently unorganized datasets and the large data volume (frequently millions of XYZ coordinates) of LiDAR datasets, a multitude of algorithms for automatic 3D object detection (e.g., of single trees) and physical surface description (e.g., biomass) have been developed. However, so far the exchange of datasets and approaches (i.e., extraction algorithms) among LiDAR users

  20. Aumento de dorso nasal con implante blando de tejido conectivo laxo y cartílago troce

    Directory of Open Access Journals (Sweden)

    Mariana Vásquez-García

    Full Text Available Introducción y Objetivo: Están descritas innumerables técnicas para el aumento del dorso nasal. Los injertos autólogos son el material preferido en la reconstrucción nasal debido a su biocompatibilidad y a su menor riesgo de infección y exposición. La técnica de cartílago troceado envuelto en fascia temporal se ha popularizado porque evita la visualización de los injertos a través de la piel del dorso nasal. Nuestro estudio tiene como objetivo demostrar que también el tejido conectivo laxo retroauricular es una envoltura útil para conformar con el cartílago troceado un implante blando que aumente el dorso nasal, proporcionando un resultado estético natural. Material y Método: Realizamos un estudio retrospectivo, entre diciembre de 2012 a diciembre de 2015 con 15 pacientes sometidos a aumento de dorso nasal con cartílago troceado de septum y concha auricular envuelto en tejido conectivo laxo retroauricular, utilizando la vía de rinoplastia externa. Evaluamos los resultados de forma subjetiva con un cuestionario entregado a los pacientes y observando las fotos pre y postoperatorias a corto, medio y largo plazo. Objetivamente medimos las alturas del dorso nasal pre y postoperatoriamente. Resultados: Todos los pacientes presentaron resultados muy satisfactorios. El valor promedio de aumento del dorso nasal a los 3 meses de postoperatorio en nasion fue de 0.38 cm, en rinion de 0.39 cm y en suprapunta de 0.41 cm, manteniéndose iguales valores a los 6, 12 y 18 meses. Conclusiones: Destacamos los beneficios de la envoltura con tejido conectivo laxo retroauricular para cubrir de forma natural las irregularidades del dorso nasal, eliminando el estigma de nariz operada (fibrosis y cicatrización anómala. Su viabilidad en la zona receptora (dorso nasal lo hace muy recomendable para la corrección de deformidades de esta zona. Es por ello que recomendamos su uso como alternativa para corregir hundimientos de dorso nasal de origen

  1. Enfermedad injerto contra huesped: sus manifestaciones bucales

    Directory of Open Access Journals (Sweden)

    Claudia Marcela Hernández Cancino

    Full Text Available La enfermedad injerto contra huésped es la principal complicación que sufren los pacientes que han recibido trasplante alogénico. Se produce como consecuencia de una reacción inflamatoria exagerada mediada por los linfocitos del donante y estimulada por aquellos tejidos que han sido lesionados por la enfermedad de base, por las infecciones previas o por el tratamiento de acondicionamiento. El diagnóstico es clínico e histopatológico. Los pacientes presentan rash maculopapular pruriginoso y doloroso que puede extenderse por toda la superficie corporal, fiebre, vómito, náuseas, diarrea y anorexia. En la mucosa bucal se observan erosiones ulceradas, extremamente dolorosas y pueden ser la primera o la única manifestación detectable clínicamente de esta enfermedad. El objetivo es presentar un caso de enfermedad de injerto contra huésped. Se trata de una mujer de 54 años de edad con linfoma no-Hodgking, que recibió tratamiento con quimioterapia, radioterapia y trasplante de células madre hematopoyéticas en el 2009. Tres meses después, presentó lesiones en la piel diagnosticadas como enfermedad injerto contra huésped y tratadas con corticoesteroides, a los seis meses fue remitida al odontólogo porque se quejaba de ardor en la boca, xerostomía y dificultad para masticar, tenía úlceras en la mucosa bucal y en la lengua. En la ocasión recibió tratamiento con corticoesteroides, clorhexidina, orientaciones de higiene bucal y controles clínicos permanentes. Aunque existen protocolos para la prevención y el tratamiento de la enfermedad injerto contra el huésped, su frecuencia ha aumentado en los últimos años debido al incremento en el número de trasplantes. Por esta razón, es fundamental que el odontólogo forme parte del grupo multidisciplinario que asiste al paciente y que esté familiarizado con los signos y síntomas de esta enfermedad en la mucosa bucal, pues las manifestaciones clínicas pueden ser las únicas para

  2. Diagnóstico Territorial Integral del municipio de Ciudad Darío

    Directory of Open Access Journals (Sweden)

    Laurent Dietsch

    2010-12-01

    Full Text Available EN ESTE ARTÍCULO SE PRESENTA EL “DIAGNÓSTICO TERRITORIAL INTEGRAL de Ciudad Darío” realizado como trabajo de fin de curso de la Maestría en Desarrollo Rural de la Universidad Centroamericana. Este estudio ha buscado contribuir a la formulación de propuestas de intervención de los actores sociales del municipio de Ciudad Darío sobre los procesos estratégicos de desarrollo del territorio. Se realizó unazonificación integral del municipio, identificándose cuatro zonas: una zona alta, campesina de agricultura de subsistencia; una zona de laderas secas; una planicie seca de latifundio ganadero; y finalmente, una zona de llanos y vegas fértiles de riego semi-intensivo. Posteriormente, se identificaron y clasificaron por capital (ambiental, económico, social-humano y político-institucional y nivel territorial, los principales procesos de cambio que afectan o podrían afectar al municipio. Su análisis permitió caracterizar las principales oportunidades y amenazas para el desarrollo del territorio y, al relacionarlo con las fortalezas y debilidades identificadas en la zonificación, evidenciar los principales factores que podrían incidir en el municipio y sus principales retos. Para enfrentar estos retos, se identificaron tres ejes estratégicos: la reducción de los niveles de inseguridad alimentaria y vulnerabilidad ambiental del municipio; el fomento integral de las cadenas de producción de hortalizas; y la prevención de riesgos sociales. Para cada uno de estos ejes se ha definido un conjunto de acciones ordenadas por capital y nivel territorial, orientadas a incidir sobre los principales procesos de cambio identificados. Finalmente, se definieron ejes estratégicos transversales enfocados al desarrollo de capacidades de incidir sobre los procesos claves de desarrollo del municipio.

  3. Inhibición de la acumulación de Rojo Fenol por sulfametoxipiridazina en cortes de tejido renal

    Directory of Open Access Journals (Sweden)

    Jorge Sarmiento M.

    1962-10-01

    Full Text Available En relación con un trabajo anterior, en el cual se comprobó en el animal intacto la elevación de la concentración plasmática de penicilina cuando se había inyectado media hora antes sulfametoxipiridazina, el presente trabajo demuestra, en cortes de tejido renal adecuadamente conservados, que la capacidad de transporte del epitelio tubular renal para el rojo de fenol se inhibe en proporción a la concentración de sulfametoxipiridazina presente. Como el sistema enzimático responsable de la secreción tubular de la penicilina es idéntico al de la secreción del Rojo Fenol, se concluye que los resultados obtenidos son aplicables al caso de la penicilina.

  4. A Study on Factors Affecting Airborne LiDAR Penetration

    Directory of Open Access Journals (Sweden)

    Wei-Chen Hsu

    2015-01-01

    Full Text Available This study uses data from different periods, areas and parameters of airborne LiDAR (light detection and ranging surveys to understand the factors that influence airborne LiDAR penetration rate. A discussion is presented on the relationships between these factors and LiDAR penetration rate. The results show that the flight height above ground level (AGL does not have any relationship with the penetration rate. There are some factors that should have larger influence. For example, the laser is affected by a wet ground surface by reducing the number of return echoes. The field of view (FOV has a slightly negative correlation with the penetration rate, which indicates that the laser incidence angle close to zero should achieve the best penetration. The vegetation cover rate also shows a negative correlation with the penetration rate, thus bare ground and reduced vegetation in the aftermath of a typhoon also cause high penetration rate. More return echoes could be extracted from the full-waveform system, thereby effectively improving the penetration rate. This study shows that full-waveform LiDAR is an effective method for increasing the number of surface reflected echoes. This study suggests avoiding LiDAR survey employment directly following precipitation to prevent laser echo reduction.

  5. Waveform LiDAR across forest biomass gradients

    Science.gov (United States)

    Montesano, P. M.; Nelson, R. F.; Dubayah, R.; Sun, G.; Ranson, J.

    2011-12-01

    Detailed information on the quantity and distribution of aboveground biomass (AGB) is needed to understand how it varies across space and changes over time. Waveform LiDAR data is routinely used to derive the heights of scattering elements in each illuminated footprint, and the vertical structure of vegetation is related to AGB. Changes in LiDAR waveforms across vegetation structure gradients can demonstrate instrument sensitivity to land cover transitions. A close examination of LiDAR waveforms in footprints across a forest gradient can provide new insight into the relationship of vegetation structure and forest AGB. In this study we use field measurements of individual trees within Laser Vegetation Imaging Sensor (LVIS) footprints along transects crossing forest to non-forest gradients to examine changes in LVIS waveform characteristics at sites with low (field AGB measurements to original and adjusted LVIS waveforms to detect the forest AGB interval along a forest - non-forest transition in which the LVIS waveform lose the ability to discern differences in AGB. Our results help identify the lower end the forest biomass range that a ~20m footprint waveform LiDAR can detect, which can help infer accumulation of biomass after disturbances and during forest expansion, and which can guide the use of LiDAR within a multi-sensor fusion biomass mapping approach.

  6. Miniestacas de yuca (Manihot esculenta Crantz: hacia un eficiente sistema de propagación en cultivo de tejidos

    Directory of Open Access Journals (Sweden)

    Miguel Macgayver Bonilla Morales

    2015-12-01

    Full Text Available Tradicionalmente, la yuca ha sido una fuente de carbohidratos para sectores de la población con bajos niveles de ingreso a nivel mundial, por lo que está implícita en la seguridad y soberanía alimentaria de la mayoría de los países denominados del tercer mundo. De esta manera, en sistemas de propagación para la regulación de problemas fitosanitarios y producción masiva, las técnicas de cultivo de tejidos, facilitan estos procesos en plantas con propagación vegetativa como la yuca. Sin embargo, el paso más costoso en el sistema, es la introducción y propagación a nivel in vitro, que luego serán endurecidas en la etapa ex vitro y llevadas a campo. Por su parte, la generación de miniestacas permite la obtención de semilla asexual o estacas de plantas endurecidas que están en proceso de finalización de la etapa ex vitro y que en vez de ir a campo se multiplican para que el sistema de producción de plantas sea más eficiente, pues de cada planta se pueden obtener de 4-6 miniestacas, que no tienen necesidad de aclimatación y, por ende, va a ser una producción segura de una nueva planta por miniestacas que se siembre. De esta manera, el sistema de propagación en cultivo de tejidos vegetales en yuca tiende a ser mejor aprovechado y rentable, pues el proceso será tanto a nivel in vitro como ex vitro.

  7. Moral y posconflicto, o la reconstrucción del tejido social moderno colombiano

    Directory of Open Access Journals (Sweden)

    Gil C., Mario Germán Gil C.

    2016-09-01

    Full Text Available El presente escrito gira en torno al problema de la moral y el posconflicto, y del papel de la escuela en la construcción de un sujeto que rompa dos herencias, que han impedido la modernidad en nuestro presente colombiano: una moral pastoral-escolástica y el fracaso de la moral formal moderna liberal. Ante los cuales se propone desde la educación una ética de sí mismo, en la consolidación de unas subjetividades radicalmente distintas hasta ahora. Por ello dicho ejercicio del desarrollo humano que rescate las autonomías comunitarias con el acompañamiento de lo pedagógico, puestas de cara al momento del proceso de paz y particularmente al posconflicto hace un llamado del retorno a lo comunitario, como aquellos procesos singulares de tejer propuestas venidas de lo cotidiano, de lo local, que generadas desde lógicas del sentir, restituyan comunidades constructoras de sus propios destinos, donde no tengan cabida lógicas racionales que sólo miden el impacto del avance tecnológico científico, donde se olvida el sentido de tener una existencia en libertad y convivencia mutua de lo humano con la naturaleza, lo cual quizás obligue a reconstruir formas de pensar donde la palabra este en coherencia con lo que se dice y de hace.

  8. Adolescent Girls with illegally Induced Abortion in Dar es Salaam

    DEFF Research Database (Denmark)

    Rasch, V; Silberschmidt, Margrethe; Mchumvu, Y

    2000-01-01

    that gave them the right to seek family planning services and in practice these services are not being provided. There is a need for youth-friendly family planning services and to make abortion safe and legal, in order to reduce unwanted pregnancies and abortion-related complications and deaths among......This article reports on a study of induced abortion among adolescent girls in Dar es Salaam, Tanzania, who were admitted to a district hospital in Dar es Salaam because of an illegally induced abortion in 1997. In the quantitative part of the study, 197 teenage girls (aged 14-19) were asked...

  9. Raster Vs. Point Cloud LiDAR Data Classification

    Science.gov (United States)

    El-Ashmawy, N.; Shaker, A.

    2014-09-01

    Airborne Laser Scanning systems with light detection and ranging (LiDAR) technology is one of the fast and accurate 3D point data acquisition techniques. Generating accurate digital terrain and/or surface models (DTM/DSM) is the main application of collecting LiDAR range data. Recently, LiDAR range and intensity data have been used for land cover classification applications. Data range and Intensity, (strength of the backscattered signals measured by the LiDAR systems), are affected by the flying height, the ground elevation, scanning angle and the physical characteristics of the objects surface. These effects may lead to uneven distribution of point cloud or some gaps that may affect the classification process. Researchers have investigated the conversion of LiDAR range point data to raster image for terrain modelling. Interpolation techniques have been used to achieve the best representation of surfaces, and to fill the gaps between the LiDAR footprints. Interpolation methods are also investigated to generate LiDAR range and intensity image data for land cover classification applications. In this paper, different approach has been followed to classifying the LiDAR data (range and intensity) for land cover mapping. The methodology relies on the classification of the point cloud data based on their range and intensity and then converted the classified points into raster image. The gaps in the data are filled based on the classes of the nearest neighbour. Land cover maps are produced using two approaches using: (a) the conventional raster image data based on point interpolation; and (b) the proposed point data classification. A study area covering an urban district in Burnaby, British Colombia, Canada, is selected to compare the results of the two approaches. Five different land cover classes can be distinguished in that area: buildings, roads and parking areas, trees, low vegetation (grass), and bare soil. The results show that an improvement of around 10 % in the

  10. El amor de lejos de Jaufré Rudel y sus transformaciones medievales: mito, vida, cuento y narración novelesca

    OpenAIRE

    Carmona Fernández, Fernando

    2013-01-01

    La vida de Jaufré Rudel originada en su poesía dará lugar a distintas modalidades narrativas. Sus manifestaciones literarias medievales en interrelación particularmente con la leyenda de Tristán y también con relatos como Guillaume de Dole y Lai de l’ombre de Jean Renart, Chastelaine de Vergi, Roman du Castelain de Coucy y cuentos 44 y 77 del Decamerón, entre otros textos, hace que el tema del amor de lejos constituya con todos ellos, a fnales del siglo XIII, la mod...

  11. 2004 Federal Emergency Management Agency (FEMA) Bare Earth Topographic LiDAR: Connecticut River

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — LiDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. The LiDAR files were converted from .PTS format to LAS...

  12. 2007 US Army Corps of Engineers (USACE), Jacksonville District US Virgin Islands LiDAR

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This Light Detection and Ranging (LiDAR) bare-earth classified LAS dataset is a topographic survey conducted for the USACE USVI LiDAR Project. These data were...

  13. 2011 U.S. Geological Survey (USGS) Topographic LiDAR: Louisiana Region 1

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TASK NAME: Louisiana Region 1 LiDAR ARRA Task Order LiDAR Data Acquisition and Processing Production Task- Vermillion, Iberia, St. Mary, Terrebonne, and Lafourche...

  14. 2011 U.S. Geological Survey (USGS) Topographic LiDAR: Louisiana Region 2

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TASK NAME: Louisiana Region 2 LiDAR ARRA Task Order LiDAR Data Acquisition and Processing Production Task- Orleans, Plaquemines, St. Bernard, St. Tammany Parishes,...

  15. Estudio in vitro sobre los efectos de la cocaína sobre los tejidos duros del diente In vitro study on the effects of cocaine on the hard tissues of the tooth

    Directory of Open Access Journals (Sweden)

    Eduvigis Solórzano Navarro

    2008-12-01

    Full Text Available El uso de los derivados de la cocaína es un problema de salud pública en continuo crecimiento. Estas drogas son frecuentemente frotadas sobre la mucosa gingival, pero sus efectos son poco conocidos y de difícil diagnóstico. Con este trabajo se pretende demostrar in vitro, que la aplicación por frotación de la cocaína sobre la superficie dentaria produce erosión del esmalte. Se seleccionaron 30 dientes sanos, distribuidos aleatoriamente en 3 grupos, a los cuales se frotó sobre la superficie vestibular clorhidrato de cocaína, basuco y limón (grupo control respectivamente, durante 40 semanas. Las lesiones más características observadas fueron fractura y pérdida de sustancia dura, demostrando así que la aplicación tópica y continua de drogas en cavidad bucal produce lesiones en los tejidos duros del diente.The use of cocaine derivatives is an increasingly growing public health problem. These drugs are frequently rubbed on the gingival mucosa, but their efffects are little known and difficult to be diagnosed. This paper pretends to prove in vitro that the rubbing of cocaine on the dental surface produces enamel erosion. 30 healthy teeth were selected and distributed at random into 3 groups that were rubbed cocaine hydrochloride, bazuko and lemon (control group on the vestibular surface, respectively, during 40 weeks. The most observed characteristic lesions were fracture and loss of the dental hard substance, which showed that the topical and continual application of drugs on the oral cavity causes lesions in the hard tissues of the tooth.

  16. Comportamiento detersivo de las formulaciones ecológicas en la extracción de grasas y proteínas en tejido de algodón aprestado y tratado con diversos suavizantes

    OpenAIRE

    Carrión Fité, Francisco Javier; Serra Gasol, Miquel

    2002-01-01

    En el presente trabajo se efectuó un estudio del comportamiento detersivo producido por una formulación ecológica, aplicada para el lavado de un tejido de algodón aprestado con una resina DMDHEU y tratado con diferentes suavizantes catiónicos, del tipo de amonio silicona y esterquat. A estos tejidos se aplicaron, antes del lavado, dos impurezas del tipo proteína y una tipo aceitosa. Los efectos del detergente, en la extracción de tales impurezas del tejido aprestado y tratado con los diferent...

  17. Comportamiento de los tejidos óseo y mucoso perimplantarios con la utilización de un sistema de implantes dentales de plataforma estrecha. Un año de seguimiento

    OpenAIRE

    Fernández Formoso, Noelia

    2012-01-01

    Se asignaron un total de 43 pacientes en dos grupos: grupo control con implantes convencionales y grupo test con implantes de plataforma estrecha. Se procedió a medir los siguientes parámetros: medición del nivel óseo y medición de los tejidos blandos. Se utilizaron dos métodos radiográficos: método convencional y la técnica modificada. Resultados: 1)nivel óseo: la pérdida de tejido óseo con plataforma estrecha mejora los resultados obtenidos con plataforma convencional, 2)tejidos blandos: me...

  18. Papel del colágeno VI en la homeostasis del músculo esquelético y tejido adiposo: implicaciones en la patofisiología de las distrofias musculares

    OpenAIRE

    Rodríguez García, Mª Ángeles

    2016-01-01

    [spa] El colágeno VI es una proteína de la matriz extracelular cuyos defectos conducen a una variedad de trastornos musculares en humanos caracterizados por una debilidad muscular entre otros múltiples síntomas. Tanto el colágeno VI, como su fragmento soluble carboxilo terminal llamado endotrofina se encuentran altamente expresados en los dos principales tejidos periféricos que regulan la glucemia, el músculo esquelético y tejido adiposo. Los niveles de ARNm de colágeno VI en el tejido adipos...

  19. Study on environmental test technology of LiDAR used for vehicle

    Science.gov (United States)

    Wang, Yi; Yang, Jianfeng; Ou, Yong

    2018-03-01

    With the development of intelligent driving, the LiDAR used for vehicle plays an important role in it, in some extent LiDAR is the key factor of intelligent driving. And environmental adaptability is one critical factor of quality, it relates success or failure of LiDAR. This article discusses about the environment and its effects on LiDAR used for vehicle, it includes analysis of any possible environment that vehicle experiences, and environmental test design.

  20. Relationship between LiDAR-derived forest canopy height and Landsat images

    Science.gov (United States)

    Cristina Pascual; Antonio Garcia-Abril; Warren B. Cohen; Susana. Martin-Fernandez

    2010-01-01

    The mean and standard deviation (SD) of light detection and ranging (LiDAR)-derived canopy height are related to forest structure. However, LiDAR data typically cover a limited area and have a high economic cost compared with satellite optical imagery. Optical images may be required to extrapolate LiDAR height measurements across a broad landscape. Different spectral...

  1. Demystifying LiDAR technologies for temperate rainforest in the Pacific Northwest

    Science.gov (United States)

    Rhonda Mazza; Demetrios Gatziolis

    2013-01-01

    Light detection and ranging (LiDAR), also known as airborne laser scanning, is a rapidly emerging technology for remote sensing. Used to help map, monitor, and assess natural resources, LiDAR data were first embraced by forestry professionals in Scandinavia as a tool for conducting forest inventories in the mid to late 1990s. Thus early LiDAR theory and applications...

  2. A multiscale curvature algorithm for classifying discrete return LiDAR in forested environments

    Science.gov (United States)

    Jeffrey S. Evans; Andrew T. Hudak

    2007-01-01

    One prerequisite to the use of light detection and ranging (LiDAR) across disciplines is differentiating ground from nonground returns. The objective was to automatically and objectively classify points within unclassified LiDAR point clouds, with few model parameters and minimal postprocessing. Presented is an automated method for classifying LiDAR returns as ground...

  3. Tree filtering for high density airborne LiDAR data

    NARCIS (Netherlands)

    Abd Rahman, M.Z.; Gorte, B.G.H.

    2008-01-01

    A high resolution Airborne LiDAR data creates better opportunity for an individual tree measurement and provides valuable results for more precise forest inventory. This paper presents tree filtering approach that able to separate dominant tree and undergrowth vegetation. The results can be used for

  4. Feeding Dar es Salaam: a symbiotic food system perspective

    NARCIS (Netherlands)

    Wegerif, Marc C.A.

    2017-01-01

    This thesis is a sociological analysis of the agri-food system that feeds most of the over four and a half million residents of the fast-growing city of Dar es Salaam in Tanzania. It is based on qualitative research that has generated a picture of the food system that supplies the important foods

  5. Coastal Marine Pollution in Dar es Salaam (Tanzania) relative to ...

    African Journals Online (AJOL)

    Pollution surveys were undertaken during 2007 and 2008 in the coastal marine environment of Dar es Salaam and the remote Ras Dege Creek. The objective was to determine the levels of microbial contamination, heavy metals and persistent organic pollutants and compare these with the recommended environmental ...

  6. Aloe; Beyond use as cosmetics | Pili | Dar Es Salaam Medical ...

    African Journals Online (AJOL)

    Dar Es Salaam Medical Students' Journal. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 15, No 1 (2008) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Aloe; Beyond use as cosmetics. K Pili. Abstract.

  7. Dar es Salaam City and Challenges in Solid Waste Management ...

    African Journals Online (AJOL)

    The focus of this paper is on challenges facing solid waste management in. Manzese and Sinza wards, in Dar es Salaam city. In this paper different ways of generating, disposing waste and the associated problems are surveyed. About 102 people were interviewed. Different methods were employed in data collection which ...

  8. Nitrogen concentration estimation with hyperspectral LiDAR

    Directory of Open Access Journals (Sweden)

    O. Nevalainen

    2013-10-01

    Full Text Available Agricultural lands have strong impact on global carbon dynamics and nitrogen availability. Monitoring changes in agricultural lands require more efficient and accurate methods. The first prototype of a full waveform hyperspectral Light Detection and Ranging (LiDAR instrument has been developed at the Finnish Geodetic Institute (FGI. The instrument efficiently combines the benefits of passive and active remote sensing sensors. It is able to produce 3D point clouds with spectral information included for every point which offers great potential in the field of remote sensing of environment. This study investigates the performance of the hyperspectral LiDAR instrument in nitrogen estimation. The investigation was conducted by finding vegetation indices sensitive to nitrogen concentration using hyperspectral LiDAR data and validating their performance in nitrogen estimation. The nitrogen estimation was performed by calculating 28 published vegetation indices to ten oat samples grown in different fertilization conditions. Reference data was acquired by laboratory nitrogen concentration analysis. The performance of the indices in nitrogen estimation was determined by linear regression and leave-one-out cross-validation. The results indicate that the hyperspectral LiDAR instrument holds a good capability to estimate plant biochemical parameters such as nitrogen concentration. The instrument holds much potential in various environmental applications and provides a significant improvement to the remote sensing of environment.

  9. Engineering geological mapping of Dar es Salaam city, Tanzania ...

    African Journals Online (AJOL)

    Two basic maps were prepared, namely, geomorphological and geological map depicts the spatial extent of the Neogene geological formations. Three distinct sandstone terraces could be distinguished in Dar es Salaam region at 0-15 m and 30 – 40 m above sea level. The terraces comprised sandstones fringed by coral ...

  10. San Clemente Island Baseline LiDAR Mapping Final Report

    Science.gov (United States)

    2016-12-01

    full-waveform LiDAR (Riegl® Q680i), a hyperspectral sensor (Specim AISA EAGLE), an SLR camera, and supporting instruments for geolocation and...manual editing would be necessary for detailed gully identification. Figure 12. Extensive gully erosion on the southwest part of San Clemente. Figure 13

  11. Heavy Metals and Organic Pollutants in Sediments of Dar es ...

    African Journals Online (AJOL)

    The Florida criteria (MacDonald 1993) for assessment of pollution of tropical marine sediments was adopted in oredr to evaluate the extent of pollution in Dar es Salaam harbour sediments. The Florida criteria is one of the established references for sediment quality assessment. Heavy metals that had concentrations above ...

  12. Knowledge, Attitude and Practice of Commercial Drivers in Dar es ...

    African Journals Online (AJOL)

    Purpose: The objective of this study was, first, to assess the knowledge, attitude and practice of commercial drivers in Dar es Salaam with regard to medicines that impair driving, and second, to evaluate the adequacy of antihistamine label information. Methods: Drivers were interviewed using a questionnaire after obtaining ...

  13. Liquid waste management: The case of Bahir Dar, Ethiopia

    African Journals Online (AJOL)

    admin

    liquid waste management practices of the community; to assess the .... Logistic regression was performed to assess the impact of a number of factors on the .... the ever-growing Bahir Dar Town with modern buildings using flush toilets will ...

  14. Community violence in Dar es Salaam, Tanzania: A mixed methods ...

    African Journals Online (AJOL)

    Most homicide deaths in Dar es Salaam, Tanzania (DSM) are a result of violence arising from within the community. This type of violence is commonly called, by perpetrators and victims, “mob justice”. Unilateral non-state collective violence can take four forms: lynching, vigilantism, rioting, and terrorism. The purpose of this ...

  15. Quantifying Ladder Fuels: A New Approach Using LiDAR

    Science.gov (United States)

    Heather Kramer; Brandon Collins; Maggi Kelly; Scott Stephens

    2014-01-01

    We investigated the relationship between LiDAR and ladder fuels in the northern Sierra Nevada, California USA. Ladder fuels are often targeted in hazardous fuel reduction treatments due to their role in propagating fire from the forest floor to tree crowns. Despite their importance, ladder fuels are difficult to quantify. One common approach is to calculate canopy base...

  16. Aggression; a Paradoxical pathology of the mind | Kitapondya | Dar ...

    African Journals Online (AJOL)

    Dar Es Salaam Medical Students' Journal. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 15, No 1 (2008) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Aggression; a Paradoxical pathology of the mind.

  17. Accessibility, Congestion and Travel Delays in Dar es Salaam

    DEFF Research Database (Denmark)

    Melbye, Dea Christine; Møller-Jensen, Lasse; Andreasen, Manja Hoppe

    2015-01-01

    on to present a review of research into travel speed levels and congestion in Dar es Salaam. A set of city-wide maps of accessibility and delay levels are constructed based on available speed data and road network data obtained from the OpenStreetMap project and the findings are discussed with respect...

  18. 2011 USGS Topographic LiDAR: Suwannee River Expansion

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — USGS Task Order No. G10PD00236 USGS Contract No. G10PC00093 The Light Detection and Ranging (LiDAR) dataset is a survey of the Suwannee River Expansion in...

  19. Tissue localization of betacyanins in cactus stems Localización de betacianinas en tejido del tallo de cactus

    Directory of Open Access Journals (Sweden)

    Alessandro Mosco

    2012-06-01

    Full Text Available Betalains are soluble pigments found only in the suborder Chenopodiniae, while in all other Angiospermae they are replaced by anthocyanins. The convergent evolution of the presence of anthocyanins and betalains in vegetative tissues supports the hypothesis of a similar function, based on the absorption properties of these pigments. The screening effect of anthocyanins results in the reduction of the amount of photoinhibition. betalains, being the anthocyanin counterpart in most families of Caryophyllales, were also suggested to have a screening role. This study is aimed at identifying in which Cactaceae stem tissues betacyanins, reddish to violet betalain pigments, accumulate. Stem accumulation of betacyanins was observed in cacti both in their natural habitat and in cultivation. The localization of betacyanins was assessed by light microscope studies on tubercle transverse sections. During 2 field trips in distinct years to the Mexican plateau in March, many cactus species, belonging to different genera, were observed displaying a reddish stem. Light microscope studies on cultivated plants showed that betacyanins accumulate in the hypodermis and in the outer layers of the chlorenchyma, where they may act as a screen, thus protecting the photosystems present in the underlying chlorenchyma, and have a possible antioxidant function in the cortex.Las betalaínas son pigmentos solubles que se encuentran sólo en el suborden Chenopodiniae, mientras que en el resto de Angiospermae, lo que existe son antocianinas. La evolución convergente de la presencia de antocianinas y betalaínas en tejidos vegetativos apoya la hipótesis de una función similar, que se basa en las propiedades de absorción de estos pigmentos. El efecto pantalla de las antocianinas resulta en la reducción de fotoinhibición. Siendo las betalaínas la contraparte antocianítica en la mayoría de las familias de Caryophyllales, se sugirió también un papel de pantalla de estos

  20. La pedagogía de proyectos en la escuela: una revisión de sus fundamentos filosóficos y psicológicos

    Directory of Open Access Journals (Sweden)

    Nylza Offir García-Vera

    2012-01-01

    Full Text Available El artículo de reflexión derivado de la investigación La pedagogía de proyectos en la escuela: una revisión de sus fundamentos filosóficos y psicológicos, presenta un análisis global del enfoque denominado hoy Pedagogía de Proyectos, desde un recorrido histórico y epistemológico que intenta dar cuenta de sus orígenes y fundamentos teóricos constitutivos desde la filosofía con el pragmatismo, desde la psicología con el constructivismo, aplicados o recontextualizados en el campo educativo y pedagógico. Lo anterior en la perspectiva de señalar algunos puntos críticos derivados de tales fundamentos y de avizorar las posibles implicaciones para la cultura escolar.

  1. La estructura del fullereno C60 y sus aplicaciones

    OpenAIRE

    Vasilievna Kharissova, Oxana; Ortiz Méndez, Ubaldo

    2002-01-01

    Se revisan los datos reportados de una nueva clase de materiales basados en los fullerenos. Se explica la estructura del fullereno C60 y sus compuestos con metales alcalinos, sus propiedades y aplicaciones. Se señala que estos compuestos tienen propiedades de superconducción comparable con la de los tradicionales cupratos. Se indica que esta modificación del carbono puede formar nanotubos que tienen varias aplicaciones prácticas debido a sus propiedades.

  2. En busca de la coherencia. Algunos comentarios sobre: El delito político y sus incidencias

    Directory of Open Access Journals (Sweden)

    Jean Carlo Mejía Azuero

    2005-01-01

    Full Text Available Cuánto quisiera que el gobierno comprendiera la naturaleza del conflicto que vivimos; que supiera realmente cómo se mueve el enemigo dentro y fuera del país, sin disparar un cartucho; cuánto daría porque se entendiera por parte de sus asesores, que la guerra va mucho más allá de lo bélico, que trasciende lo político, lo jurídico, lo judicial y que se libra en un sinnúmero de campos y a través de muchas variables. Cómo quisiera que se estudiaran los efectos que la línea argumentativa utilizada puede generar para el estamento castrense en una democracia de mínimos como la colombiana

  3. Contenidos de isómeros trans de los ácidos grasos en productos cárnicos. (III Tejido adiposo y grasa intramuscular de vacuno

    Directory of Open Access Journals (Sweden)

    Lluch, M. C.

    1993-06-01

    Full Text Available We give the results obtained for the determination of trans fatty acids in subcutaneous and intramuscular fats from different veal carcasses, using gas chromatography. FA composition differs clearly between both tissues, showing mean values of 58.7% SFA, 39.1% MUFA and 2.7% PUFA in the adipose tissue, and of 44.7% SFA, 46.1% MUFA and 9.4% PUFA in the muscle. Trans fatty acid values obtained in muscle and adipose tissue show statistically significant differences (mean values of 7% total trans fatty acids in intramuscular fat and 10.5% in adipose tissue fat. Besides, we observed a clearly different distribution for C 16: 1t, that didn't show these differences, while C 18: 1t showed a similar distribution than total trans fatty acids. Related to the factors that could determine the trans fatty acid contents in veal carcasses, we found that the race showed more differences between groups than the origin of the animal and their commercial category. On the other hand, correlations we found between trans fatty acids and the total of saturated, mono and polyunsaturated fatty acids showed an opposite sign according to the type of tissue (muscular or adipose. Thus, an increase in the trans fatty acid content was associated with a parallel increase of saturated and decrease in polyunsaturated fatty acid contents in the intramuscular fat. On the contrary, an increase of trans fatty acid content in adipose fat was correlated to a decrease of saturated and an increase of mono and polyunsaturated fatty acid contents.

    Se presentan los resultados obtenidos para la determinación de ácidos grasos en una serie de muestras de tejidos subcutáneo y muscular, procedentes de canales de vacuno, por aplicación de la cromatografía en fase gaseosa, para los que se obtuvieron unos valores medios de 58.7% de ácidos saturados, 39.1 % de monoinsaturados y 2.7% de polinsaturados, en el tejido adiposo, y de 44.7% de saturados, 46.1% de monoinsaturados y 9.4% de

  4. Regeneración de tejido periodontal in vitro con células madre pluripotenciales de la pulpa dental (DPPSC) del tercer molar

    OpenAIRE

    Hategan, Iulia Emilia

    2016-01-01

    El periodonto está formado por varios tejidos: la encía, el ligamento periodontal, el cemento radicular y el hueso alveolar. El periodonto tiene dos funciones fundamentales: protección e inserción. La función de protección la realizan la encía y el epitelio de unión, mientras que la función de inserción se desempeña a través del ligamento periodontal, el cemento radicular y el hueso alveolar.- El ligamento periodontal es un tejido celular altamente vascularizado que rodea la raíz del dien...

  5. Diversity arrays technology (DArT) markers in apple for genetic linkage maps

    OpenAIRE

    Schouten, H.J.; Weg, van de, W.E.; Carling, J.; Khan, S.A.; McKay, S.J.; Kaauwen, van, M.P.W.

    2012-01-01

    Diversity Arrays Technology (DArT) provides a high-throughput whole-genome genotyping platform for the detection and scoring of hundreds of polymorphic loci without any need for prior sequence information. The work presented here details the development and performance of a DArT genotyping array for apple. This is the first paper on DArT in horticultural trees. Genetic mapping of DArT markers in two mapping populations and their integration with other marker types showed that DArT is a powerf...

  6. Diversity arrays technology (DArT) markers in apple for genetic linkage maps

    OpenAIRE

    Schouten, Henk J.; van de Weg, W. Eric; Carling, Jason; Khan, Sabaz Ali; McKay, Steven J.; van Kaauwen, Martijn P. W.; Wittenberg, Alexander H. J.; Koehorst-van Putten, Herma J. J.; Noordijk, Yolanda; Gao, Zhongshan; Rees, D. Jasper G.; Van Dyk, Maria M.; Jaccoud, Damian; Considine, Michael J.; Kilian, Andrzej

    2011-01-01

    Diversity Arrays Technology (DArT) provides a high-throughput whole-genome genotyping platform for the detection and scoring of hundreds of polymorphic loci without any need for prior sequence information. The work presented here details the development and performance of a DArT genotyping array for apple. This is the first paper on DArT in horticultural trees. Genetic mapping of DArT markers in two mapping populations and their integration with other marker types showed that DArT is a powerf...

  7. Técnicas empleadas en síntesis de nanocompuestos en ingeniería de tejido óseo

    Directory of Open Access Journals (Sweden)

    Alis Yovana Pataquiva Mateus

    2014-12-01

    Full Text Available Los avances en la ingeniería de tejido óseo exigen nuevos desarrollos en materiales inteligentes que permitan reemplazar hueso o bien regenerarlo. Para cumplir con esta tarea, la ingeniería biomédica, específicamente la ingeniería de los biomateriales, se ha basado en la nanotecnología ya que los tejidos son nanocompuestos naturales de perfecta arquitectura. El hueso, como nanocompuesto de colágeno y cerámico, es foco de bioinspiración a la hora de diseñar nuevos biomateriales para su tratamiento. Sin embargo, la complejidad de este tejido es enorme debido a las funciones críticas que desempeña tales como: movimiento y soporte de otros órganos vitales, almacenamiento de minerales, homeostasis, regulación del pH de la sangre y depósito de múltiples células tales como las mesenquimales, osteoblastos, condrocitos y fibroblastos, entre otras. De ahí, que es un reto para la ingeniería el diseño y la construcción de materiales con propiedades tales como biomimética, bioafinidad por las células óseas, así como cumplir con las propiedades mecánicas necesarias tales como resistencia a la compresión y a la tracción, entre otras condiciones mínimas. En esta revisión se hace alusión a algunas de las más novedosas técnicas en nanotecnología tales como nanopatrón, nanorecubrimiento y nanofibras, entre otras, empleadas en la construcción de diversos materiales nanoestructurados en el área de ingeniería de tejido óseo.

  8. Revisión sistemática: células madre derivadas del tejido adiposo, utilidad en lipoatrofia facial

    Directory of Open Access Journals (Sweden)

    M.D. Cruz-Sánchez

    2014-06-01

    Full Text Available El objetivo de la presente revisión sistemática es determinar si los lipoinjertos enriquecidos con células madre derivadas del tejido adiposo son superiores a los injertos de tejido graso convencionales en el tratamiento de la lipoatrofia facial. Realizamos una búsqueda sistemática de publicaciones en las bases de datos: MEDLINE, SCOPUS, OVID SP, SCIELO y EMBASE y posteriormente, una valoración basada en criterios actuales de medicina basada en la evidencia de las publicaciones encontradas por dos revisores independientes; las discrepancias en el análisis se resolvieron por acuerdo. Los criterios de inclusión fueron: ensayos clínicos aleatorizados, series clínicas y reportes de casos en humanos, excluyendo los ensayos en animales. Encontramos 6 publicaciones que cumplían con los criterios previamente mencionados. Entre éstas se incluyeron 2 ensayos clínicos aleatorizados controlados que recogían la superioridad de los lipoinjertos enriquecidos con células madre derivadas del tejido adiposo en el tratamiento de la lipoatrofia facial en términos de resistencia a la reabsorción (preservación del volumen y menor necesidad de nuevos lipoinjertos, en comparación con los lipoinjertos convencionales. Concluimos diciendo que existen publicaciones con buenos niveles de evidencia que sugieren que los lipoinjertos enriquecidos con células madre derivadas del tejido adiposo son superiores a los lipoinjertos convencionales en el tratamiento de la lipoatrofia facial. No obstante, son estudios de reciente publicación y aún es necesario tener seguimientos a más largo plazo y con mayor número de pacientes para mejorar los ya buenos niveles de evidencia disponibles.

  9. Espesor de la mucosa palatina previo a la colocación de injertos de tejido blando

    Directory of Open Access Journals (Sweden)

    Cynthia Baltodano Ríos

    2016-01-01

    Full Text Available Conocer el espesor de mucosa palatina es de fundamental importancia al momento de realizar procedimientos de autoinjertos de tejido blando en cirugía periodontal. Este estudio tuvo como objetivo determinar el espesor de mucosa palatina en una población peruana joven. Materiales y métodos: Estudio descriptivo que incluyó a 24 pacientes sanos (12 varones y 12 mujeres. A través de una férula de acrílico con 20 puntos de referencia (a nivel de canino, primera premolar, segunda premolar, primera molar y segunda molar fueron realizadas las perforaciones con una sonda periodontal topada. Las medidas fueron registradas a partir de puntos sangrantes a 5 minutos y 10 minutos post inyección anestésica. Las referencias desde el margen gingival fueron registradas a 3mm, 6mm, 9mm y 12mm. Resultados: El espesor de mucosa palatina promedio de todos los pacientes fue de 2,86 ± 0,22mm; el espesor de mucosa de los varones fue de 2,87 ±0,2mm mientras que el espesor de las mujeres fue de 2,85 ± 0,26 no encontrándose diferencias significativas (p=0.9. Conclusión: El espesor de mucosa palatina de la población peruana joven fue mayor en el grupo de los varones y a nivel de la segunda molar superior.

  10. Hibridación in situ para la detección de Streptococcus agalactiae en tejidos de tilapia (Oreochromis sp.

    Directory of Open Access Journals (Sweden)

    E. A. Pulido

    2010-04-01

    Full Text Available La estreptococosis es uno de los problemas sanitarios más serios en la acuicultura mundial.En Colombia la enfermedad afecta de manera importante las explotaciones detilapia. Se estandarizó la técnica de hibridación in situ (HIS en tejidos de tilapia previamenteidentificados como positivos a la presencia de S. agalactiae por la técnicade inmunoperoxidasa indirecta (IPI y microbiología. Se obtuvo señal positiva en elinterior de los granulomas con una especificidad del 100%. Se logró amplificar significativamentela señal mediante el uso de la tiramida. La HIS en tejidos de tilapia puedeser usada para el diagnóstico y estudios de patogenésis y epidemiológicos con este microorganismo.Se requieren futuras investigaciones para optimizar la marcación de lasbacterias libres en los tejidos y evaluar la sensibilidad de la técnica.

  11. Hibridación in situ para la detección de streptococcus agalactiae en tejidos de tilapia (oreochromis sp.

    Directory of Open Access Journals (Sweden)

    E. A. Pulido

    2010-01-01

    Full Text Available La estreptococosis es uno de los problemas sanitarios más serios en la acuicultura mundial. En Colombia la enfermedad afecta de manera importante las explotaciones de tilapia. se estandarizó la técnica de hibridación in situ (HIS en tejidos de tilapia previamente identificados como positivos a la presencia de S. agalactiae por la técnica de inmunoperoxidasa indirecta (IPI y microbiología. Se obtuvo señal positiva en el interior de los granulomas con una especificidad del 100%. Se logró amplificar significativamente la señal mediante el uso de la tiramida. La HIS en tejidos de tilapia puede ser usada para el diagnóstico y estudios de patogenésis y epidemiológicos con este microorganismo. Se requieren futuras investigaciones para optimizar la marcación de las bacterias libres en los tejidos y evaluar la sensibilidad de la técnica.

  12. 2005 Mississippi Merged LiDAR Data (2005 LiDAR data merged with 2005 Post-Katrina LiDAR data to create a bare-earth product for flood plain mapping in coastal Mississippi).

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Pre- and post-hurricane Katrina LiDAR datasets of Hancock, Harrison, and Jackson Counties, MS, were merged into a seamless coverage by URS. The pre-Katrina LiDAR...

  13. Proteja a sus seres queridos de las lesiones viales

    Centers for Disease Control (CDC) Podcasts

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de las lesiones viales, una de las principales causas de lesiones infantiles.

  14. Proteja a sus seres queridos de un ahogamiento

    Centers for Disease Control (CDC) Podcasts

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de un ahogamiento, una de las principales causas de lesiones infantiles.

  15. Proteja a sus seres queridos de las quemaduras

    Centers for Disease Control (CDC) Podcasts

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres para ayudar a proteger a sus niños de las quemaduras, una de las principales causas de lesiones infantiles.

  16. Proteja a sus seres queridos de las intoxicaciones

    Centers for Disease Control (CDC) Podcasts

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de una intoxicación, una de las principales causas de lesiones infantiles.

  17. La estructura de las organizaciones educativas y sus múltiples implicaciones

    Directory of Open Access Journals (Sweden)

    Isabel Cantón Mayo

    2003-01-01

    Full Text Available El estudio de los centros educativos en el marco general de la teoría de las organizaciones ha permitido grandes avances en su conocimiento científico, en formas de abordar su estudio y en las investigaciones que se generan sobre las escuelas entendidas desde la perspectiva genérica organizacional y desde la perspectiva específica por ser organizaciones que educan. En este artículo se presentan y estudian nuevas formas estructurales que permitan aplicar, conocer y utilizar sus ventajas e innovaciones en los centros educativos, al servicio de una mejor calidad en la educación que se imparte en ellos, en la idea de proporcionar una mejor alineación con el entorno en el que están inmersos y en la dinámica cambiante de la sociedad del conocimiento. Desde las formas estructurales más tradicionales como la organización formal e informal, a las más innovadoras como la organización en red, en trébol, adhocrática, etc. pueden dar una visión de los nuevos modelos emergentes en las organizaciones educativas.

  18. Representación social del agua y de sus usos

    Directory of Open Access Journals (Sweden)

    Oscar E. Navarro

    2004-01-01

    Full Text Available El agua es actualmente una cuestión política y geoestratégica de gran importancia mundial. Colombia, una de las potencias hídricas del mundo, abastece solamente la mitad de sus habitantes. La degradación del recurso y de los ecosistemas que lo generan, la polución, el despilfarro, el crecimiento de la población y su concentración en los centros urbanos, así como la falta de equidad en el acceso al agua, son algunos de los problemas que atentan contra las posibilidades de un desarrollo sostenible en el país. Con el fin de dar cuenta de los valores acordados al agua, se propuso un estudio que busca identificar la representación social que de ésta tiene un grupo social colombiano. Se entrevistó a 150 estudiantes de ciencias sociales en la ciudad de Bogotá. El análisis prototípico y categorial nos permitió plantear algunas hipótesis con respecto a las características de la representación social del agua elaborada por el grupo participante

  19. Una metodología para historia, la escuela y sus actores

    Directory of Open Access Journals (Sweden)

    Fernando Piñeres Royero

    2015-10-01

    Full Text Available Conocí al profesor Reynaldo Mora Mora cuando se formaba como magíster y se desempeñó luego como tutor en el Programa de Maestría en Administración y Supervisión Educativa de la Universidad Externado de Colombia, convenio con la Corporación Universitaria de la Costa, CUC (Barranquilla. Corrían los años 90, y desde ese entonces hemos conservado este diálogo por la educación, ahora a través de sus Tribunas Pedagógicas, pensadas para el debate con la comunidad académica, compartiendo la tarea de dar a conocer la vida de los educadores, para su caso, el de los educadores del Caribe colombiano, como él siempre añora a ese “Caribe que es amor, playa, brisa y mar”, que nos lleva a quienes habitamos esta region a estar muy relacionadoscon el contexto.

  20. Transtornos de alimentación en adolescentes y sus implicancias en la salud bucal

    Directory of Open Access Journals (Sweden)

    Lorena Flores Barrantes

    2011-07-01

    Full Text Available Los trastornos de alimentación hoy en día son uno de los problemas más importantes que pone en riesgo la salud y a veces hasta la vida de muchos adolescentes en el mundo. Las causas de los trastornos de alimentación son aún desconocidas sin embargo factores sociales, culturales, genéticos y psiquiátricos serían los posibles causales de esta enfermedad. Trastornos como la anorexia y la bulimia nerviosa han venido siendo estudiados por mayor tiempo, sin embargo hoy se conocen otros tipos de alteraciones las cuales ya son consideras como desordenes de alimentación y que requieren tratamiento multidisciplinario. En la cavidad oral de pacientes con desordenes alimenticios podemos encontrar algunos signos que nos hacen sospechar del problema o nos confirman el mismo, estos deben ser conocidos por el odontólogo para su diagnóstico oportuno y adecuado manejo. El objetivo del presente artículo de revisión es proporcionar al odontólogo los conocimientos generales sobre los diferentes tipos de trastornos alimenticios así como sus signos y síntomas para dar un correcto diagnóstico y acertado tratamiento.

  1. Real-time computational photon-counting LiDAR

    Science.gov (United States)

    Edgar, Matthew; Johnson, Steven; Phillips, David; Padgett, Miles

    2018-03-01

    The availability of compact, low-cost, and high-speed MEMS-based spatial light modulators has generated widespread interest in alternative sampling strategies for imaging systems utilizing single-pixel detectors. The development of compressed sensing schemes for real-time computational imaging may have promising commercial applications for high-performance detectors, where the availability of focal plane arrays is expensive or otherwise limited. We discuss the research and development of a prototype light detection and ranging (LiDAR) system via direct time of flight, which utilizes a single high-sensitivity photon-counting detector and fast-timing electronics to recover millimeter accuracy three-dimensional images in real time. The development of low-cost real time computational LiDAR systems could have importance for applications in security, defense, and autonomous vehicles.

  2. A Browning process : The case of Dar es Salaam city

    OpenAIRE

    Mng'ong'o, Othmar Simtali

    2005-01-01

    The study is about how green spaces and structures of Dar es Salaam city, quantitatively and qualitatively, are browning out. It also tries to explore the different reasons behind the browning tendency, and what it means to the function of the city and to the daily form of life of the inhabitants. Finally there is a discussion about how to counteract the tendency by involving the inhabitants in planning procedures following the communicative approach to planning. The main investigations have ...

  3. Rockfall hazard analysis using LiDAR and spatial modeling

    Science.gov (United States)

    Lan, Hengxing; Martin, C. Derek; Zhou, Chenghu; Lim, Chang Ho

    2010-05-01

    Rockfalls have been significant geohazards along the Canadian Class 1 Railways (CN Rail and CP Rail) since their construction in the late 1800s. These rockfalls cause damage to infrastructure, interruption of business, and environmental impacts, and their occurrence varies both spatially and temporally. The proactive management of these rockfall hazards requires enabling technologies. This paper discusses a hazard assessment strategy for rockfalls along a section of a Canadian railway using LiDAR and spatial modeling. LiDAR provides accurate topographical information of the source area of rockfalls and along their paths. Spatial modeling was conducted using Rockfall Analyst, a three dimensional extension to GIS, to determine the characteristics of the rockfalls in terms of travel distance, velocity and energy. Historical rockfall records were used to calibrate the physical characteristics of the rockfall processes. The results based on a high-resolution digital elevation model from a LiDAR dataset were compared with those based on a coarse digital elevation model. A comprehensive methodology for rockfall hazard assessment is proposed which takes into account the characteristics of source areas, the physical processes of rockfalls and the spatial attribution of their frequency and energy.

  4. LiDAR observation of the flow structure in typhoons

    Science.gov (United States)

    Wu, Yu-Ting; Hsuan, Chung-Yao; Lin, Ta-Hui

    2015-04-01

    Taiwan is subject to 3.4 landfall typhoons each year in average, generally occurring in the third quarter of every year (July-September). Understanding of boundary-layer turbulence characteristics of a typhoon is needed to ensure the safety of both onshore and offshore wind turbines used for power generation. In this study, a floating LiDAR (Light Detection and Ranging) was deployed in a harbor to collect data of wind turbulence, atmospheric pressure, and temperature in three typhoon events (Matmo typhoon, Soulik typhoon, Trami typhoon). Data collected from the floating LiDAR and from meteorological stations located at Taipei, Taichung and Kaohsiung are adopted to analyse the wind turbulence characteristics in the three typhoon events. The measurement results show that the maximum 10-min average wind speed measured with the floating LiDAR is up to 24 m/s at a height of 200 m. Compared with other normal days, the turbulence intensity is lower in the three typhoon events where the wind speed has a rapid increase. Changes of wind direction take place clearly as the typhoons cross Taiwan from East to West. Within the crossing intervals, the vertical momentum flux is observed to have a significant pattern with both upward and downward propagating waves which are relevant to the flow structure of the typhoons.

  5. Los directores aprendiendo de sus maestros

    Directory of Open Access Journals (Sweden)

    Manuel Ortega Muñoz

    2016-07-01

    Full Text Available El presente artículo de investigación está enmarcado dentro de la línea de indagación Aprendizaje para la Gestión y versa sobre los principales aprendizajes que han adquirido los directivos de educación básica del estado de Durango, México, para el mejor ejercicio de su función. Desde un estudio de narrativa, se recopilaron historias de 16 directores de educación primaria estatal pertenecientes a la zona escolar 24 del sector educativo no. 1 de la Secretaría de Educación Pública. El análisis de los datos se llevó a cabo mediante la herramienta de análisis de información cualitativa Atlas ti versión 7.5. Los hallazgos de la investigación muestran que los principales aprendizajes que los directivos de educación básica del estado de Durango, México han adquirido de sus maestros para el mejor ejercicio de su función son dos: a el trabajo en equipo, del cual se desprenden componentes como una eficaz y eficiente organización del trabajo, el trabajar siempre en colaboración y tener la mejor de las actitudes para trabajar; y b el liderazgo compartido, aspecto en que se perciben elementos como el óptimo manejo y resolución de conflictos, el liderazgo y la toma de decisiones en conjunto por parte del colectivo escolar. Abstract This research paper, framed within the line of inquiry Learning Management, deals with the main lessons that have acquired the management of basic education in the state of Durango, Mexico, for the best performance of their duties, from a study of narrative histories of 16 directors of state primary education outside the school zone 24 the education sector 1 of the Ministry of Education. The data analysis was performed using the computer statistical package you Atlas ti version 7.5. The research findings show that there are two main lessons that have acquired the management of basic education in the state of Durango, Mexico from their teachers for the better performance of their function: a teamwork

  6. El olivar andaluz y sus transformaciones recientes

    Directory of Open Access Journals (Sweden)

    Sánchez Martínez, José Domingo

    2011-06-01

    Full Text Available The olive grove in Andalusia suffered critical moments during the 20th century, and it was considered like a «culture problem» in the decades preceding the incorporation of Spain in the current European Union. Since then olive grove has known an exceptional economic conjuncture, like express his enormous superficial expansion or his notable productivity. In this work we approach the reasons that explain the consolidation of one of the most typical monocultures of southern Spain, indicating the diversity of situations that coexist under a seemingly monotonous landscape and analyzing some cases that can well illustrate the set of changes experienced since 1986.

    El olivar andaluz sufrió momentos críticos a lo largo del siglo XX, hasta el punto de ser considerado como un «cultivo problema» durante las décadas que precedieron a la incorporación de España en la actual Unión Europea. Desde entonces ha conocido una coyuntura económica excepcional, como atestiguan su enorme expansión superficial y el notable incremento de sus rendimientos. En este trabajo nos acercamos a las causas que explican la consolidación de uno de los monocultivos más característicos del sur peninsular, señalando la diversidad de situaciones que conviven bajo un paisaje aparentemente monótono y analizando algunos casos que pueden ilustrar bien el conjunto de cambios experimentados desde 1986. [fr] La culture de l’olivier andalou a connu des moments critiques tout au long du XXème siècle, au point d’être considérée comme une «culture problème» pendant les décennies qui ont précédé l’entrée de l’Espagne dans l’Union européenne. Dès lors, l’oliveraie a vécu une conjoncture économique exceptionnelle, sa forte expansion superficielle et l’augmentation remarquable de ses rendements en sont témoins. Cet article explique les causes de la consolidation d’une des monocultures les plus caractéristiques du sud de la péninsule Ib

  7. La obesidad y sus consecuencias clinicometabólicas Obesity and its clinical and metabolic consequences

    Directory of Open Access Journals (Sweden)

    Lidia Esther Rodríguez Scull

    2004-12-01

    Full Text Available La obesidad constituye un serio problema de salud mundial. En las últimas 3 décadas se ha producido un incremento importante de la cifra de personas obesas al punto de alcanzar magnitud de epidemia y de lo que es más importante: sus consecuencias clinicometabólicas. La obesidad está vinculada estrechamente con las principales causas de morbimortalidad y discapacidad. La resistencia insulínica (RI es quizás su consecuencia más temible, ya que de ella se derivan una serie de alteraciones metabólicas y endoteliales relacionadas con el desarrollo de la enfermedad vacular coronaria: la diabetes mellitus, la hipertensión arterial, las dislipidemias y la enfermedad cerebrovascular. En la medida en que aumenta el peso corporal, aumenta la producción de citoquinas y ácidos grasos libres con efectos sobre la insulina, disminuye la sensibilidad a su acción y de ahí derivan alteraciones de la pared y el tono vascular, así como del metabolismo de glúcidos y lípidos, que dan origen a estas consecuencias. Con la presente revisión nos proponemos profundizar en el papel del adipocito como órgano o tejido endocrino, y los mecanismos hasta ahora conocidos que dan origen a las complicaciones clinicometabólicas de la obesidad.Obesity is a serious problem in world health. During the last three decades, there has been a significant increase of the figure of obese persons about to reach the magnitude of epidemics and of what is more important: its clinical and metabolic consequences. Obesity is closely linked to the main cause of morbimortality and disability: Insulin resitance is maybe its most feared consequence, since a series of metabolic and endothelial alterations related to the development of coronary vascular disease derived from it: diabetes mellitus, arterial hypertension, dyslipidemias and cerebrovascular disease. As body weight increases, the production of cytokines and free fatty acids with effects on insulin is higher, and the

  8. Las células madre y sus aplicaciones actuales

    OpenAIRE

    Reguero Mera, Marta

    2017-01-01

    Introducción: Se conocen diferentes tipos de células, pero todas ellas tienen una característica en común, que provienen de las células madre. Las células madre, también denominadas células troncales o progenitoras, poseen varias características que las diferencian del resto de células. Existen varias clasificaciones para estas células: dependiendo de su potencial, capacidad de diferenciación o por su origen. El uso de dichas células, o derivadas de éstas, para reparar o renovar tejidos o cél...

  9. LAS MUJERES EN LA HISTORIA DE COLOMBIA, SUS DERECHOS, SUS DEBERES

    Directory of Open Access Journals (Sweden)

    Jacqueline Blanco Blanco

    2009-01-01

    Full Text Available La igualdad de géneros ha estado sujeta a un largo proceso religioso, político, económico y social, en razón a los intereses que mueven a la sociedad masculina frente a la femenina. Lasmujeres, al principio de su historia, permanecieron sujetas a un código moral que no reconocía más que un incontable número de deberes, sin embargo, movida por sus razones de madre y esposa, principalmente, logró involucrarse en la toma de decisiones familiares, de donde pudo proyectarse hacia la participación y construcción de su núcleo familiar, de ahí contribuyó a labrar un camino en lo político y laboral que no le pudo ser indiferente por mucho tiempo.

  10. Alterações fisiológicas da morte encefálica em potenciais doadores de órgãos e tecidos para transplantes Los cambios fisiológicos de la muerte cerebral en potenciales donadores de órganos y tejidos para trasplante Physiological changes of brain death in potential donors of organs and tissues for transplantation

    Directory of Open Access Journals (Sweden)

    Sarah Gabriel Freire

    2012-12-01

    órnea (3,1%. Se cree que el conocimiento de estos cambios permite al equipo de atención de la salud dirigir sus acciones al potencial donador de acuerdo a sus necesidades y así mantener los órganos/tejidos viables para el trasplante.The objective was to describe the physiologic changes of brain death in potential donors of organs and tissues for transplantation. Exploratory descriptive study with prospective data and quantitative approach carried out in emergency and intensive care units hospital adult, in the period from April to October 2011. The population consisted of 32 potential donors of organs and tissues for transplantation. After approval of Ethics Committee, data were collected, tabulated and analyzed by descriptive statistics by SPSS 15.0 software and presented in tables. Physiological changes were: hypotension (100%, hypothermia (75%, hypernatremia (62,5%, diabetes insipidus (37,5%, hyperglycemia (32,3%, infection (25,0%, hypertension (9,4% and corneal ulcer (3,1%. It was found that knowledge of these changes allows the team of health care to direct the potential donors according to their needs and thus keep the organ/tissue viable for transplant.

  11. Development of a regional LiDAR field plot strategy for Oregon and Washington

    Science.gov (United States)

    Arvind Bhuta; Leah Rathbun

    2015-01-01

    The National Forest System (NFS) Pacific Northwest Region (R6) has been flying LiDAR on a per project basis. Additional field data was also collected in situ to many of these LiDAR projects to aid in the development of predictive models and estimate values which are unattainable through LiDAR data alone (e.g. species composition, tree volume, and downed woody material...

  12. Proteja a sus seres queridos de las intoxicaciones

    Centers for Disease Control (CDC) Podcasts

    2008-12-10

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de una intoxicación, una de las principales causas de lesiones infantiles.  Created: 12/10/2008 by National Center for Injury Prevention and Control (NCIPC).   Date Released: 4/1/2009.

  13. Proteja a sus seres queridos de las quemaduras

    Centers for Disease Control (CDC) Podcasts

    2008-12-10

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres para ayudar a proteger a sus niños de las quemaduras, una de las principales causas de lesiones infantiles.  Created: 12/10/2008 by National Center for Injury Prevention and Control (NCIPC).   Date Released: 4/1/2009.

  14. Proteja a sus seres queridos de un ahogamiento

    Centers for Disease Control (CDC) Podcasts

    2008-12-10

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de un ahogamiento, una de las principales causas de lesiones infantiles.  Created: 12/10/2008 by National Center for Injury Prevention and Control (NCIPC).   Date Released: 4/1/2009.

  15. Proteja a sus seres queridos de las lesiones viales

    Centers for Disease Control (CDC) Podcasts

    2008-12-10

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de las lesiones viales, una de las principales causas de lesiones infantiles.  Created: 12/10/2008 by National Center for Injury Prevention and Control (NCIPC).   Date Released: 4/1/2009.

  16. Aplicación de técnicas estereológicas para la cuantificación del tejido adiposo

    Directory of Open Access Journals (Sweden)

    L. Santamaría-Solís

    Full Text Available El conocimiento de la estructura y función del tejido adiposo es fundamental no sólo por el papel que desempeña en el metabolismo lipídico y en enfermedades endocrinas como la diabetes, sino también por su importante misión como elemento estructural de soporte mecánico y de modelado del contorno orgánico (facial, por ejemplo; de ahí su relevancia en el campo de la Cirugía Plástica, Reparadora y Estética. La cuantificación es un método que se practica desde los albores de la Histología. En el presente estudio nos referiremos exclusivamente a las metodologías estereológicas, herramientas libres de sesgo que aprovechan propiedades geométricas intrínsecas de las estructuras a cuantificar. En esencia, la estereología consiste en un conjunto de métodos morfométricos que obtienen datos cuantitativos tridimensionales a partir de elementos bidimensionales, utilizando propiedades geométricas intrínsecas a la estructura que se está estudiando. Describimos las metodologías estereológicas que conducen a la estimación no sesgada de la fracción de volumen de tejido adiposo en relación con el espacio de referencia, número relativo de adipocitos, y longitud relativa del lecho microvascular que irriga el tejido adiposo.

  17. ACTIVIDAD DE ENZIMAS ANTIOXIDANTES EN TEJIDOS EMBRIOGÉNICOS Y NO EMBRIOGÉNICOS DE CAÑA DE AZÚCAR

    Directory of Open Access Journals (Sweden)

    Marina Medeiros de Araújo Silva

    2014-05-01

    Full Text Available Este trabajo tuvo el objetivo de inducir la embriogénesis directa en segmentos de hojas jóvenes no-expandidas en la variedad de caña de azúcar RB872552 e investigar la correlación de este evento morfogénico con el estrés oxidativo. Se utilizaron dos protocolos de inducción de embriogénesis somática, previamente descritos para caña de azúcar, con distintas suplementaciones en el medio de cultivo y en las condiciones de incubación. Para la conversión de embriones en plantas se utilizó el medio MS sin fitorreguladores. Se realizaron además análisis histológicas y de actividad enzimática in tejidos embriogénicos y no embriogénicos. La formación de embriones somáticos por la vía directa ocurrió en 81% de los explantes, con la combinación de los reguladores de crecimiento 2,4-D (ácido 2,4-diclorofenoxiacético y BAP (6-bencilaminopurina e incubación bajo un fotoperiodo de 16 horas. Respecto a las enzimas antioxidantes, se observó un incremento en la actividad de peroxidase y en el contenido de proteínas solubles en los tejidos embriogénicos, mientras que la polifenoloxidase y la catalase presentaron más bajos valores de actividad en estos tejidos, en comparación con los no embriogénicos. Se podría inferir que el estrés oxidativo juega un papel importante en la inducción de la embriogénesis somática en caña de azúcar.

  18. Mecanismos moleculares involucrados en la diferenciación neuronal de células madre mesenquimales humanas derivadas de tejido adiposo

    OpenAIRE

    Cardozo, Alejandra Johana

    2014-01-01

    Cardozo, A. J. (2015). Mecanismos moleculares involucrados en la diferenciación neuronal de células madre mesenquimales humanas derivadas de tejido adiposo (Tesis de Doctorado). Universidad Nacional de Quilmes, Bernal, Argentina. Como el sistema nervioso tiene una capacidad limitada de autorreparación, y la neurogénesis en el adulto está restringida a ciertas regiones del cerebro, existe un gran interés en la posibilidad de reparar el sistema nervioso a través de la utilización de técnica...

  19. Ingeniería de tejidos y cirugía de la pared abdominal: prototipo de bioprótesis

    OpenAIRE

    Brandi, Claudio; Ambrosis, Mariana; Barraud, Carlos; Argibay, Pablo

    2013-01-01

    Antecedentes: La tendencia actual es reparar los defectos de la pared abdominal con mallas de polipropileno (PP) Este polímero tiene buena resistencia a las presiones intraabdominales, sin embargo puede presentar adherencias intestinales e infección. Con la idea de evitar estas complicaciones surge el desarrollo de mallas biológicas. Éstas están compuestas de colágeno descelularizado obtenido de tejido conectivo porcino, bovino o humano. Una posibilidad actual es cultivar células madres mesen...

  20. Hibridación in situ para la detección de streptococcus agalactiae en tejidos de tilapia (oreochromis sp.)

    OpenAIRE

    Pulido, E. A.; Iregui, C. A.

    2010-01-01

    La estreptococosis es uno de los problemas sanitarios más serios en la acuicultura mundial. En Colombia la enfermedad afecta de manera importante las explotaciones de tilapia. se estandarizó la técnica de hibridación in situ (HIS ) en tejidos de tilapia previamente identificados como positivos a la presencia de S. agalactiae por la técnica de inmunoperoxidasa indirecta (IPI) y microbiología. Se obtuvo señal positiva en el interior de los granulomas con u...

  1. Caracterización del proceso de degradación de tejidos larvales durante la metamorfosis en la Mosca del Mediterráneo, Ceratitis Capitata (Wiedemann)

    OpenAIRE

    Rabossi, Alejandro

    2000-01-01

    Se han estudiado en detalle, por primera vez, los eventos moleculares más importantes responsables de la histolisis de tejidos larvales durante la transición larva-adulto de dípteros. Se han descrípto, por primera vez en los insectos, proteinasas lisosomales específicas de la histolisis y se ha correlacionado su actividad con la de otras enzimas degradativas y con las imágenes de cambios anatómicos degenerativos en músculos y cuerpo graso. Los principales resultados obtenidos son: l. Se aisló...

  2. Almidón modificado de yuca como sustituto económico del agente solidificante para medios de cultivo de tejidos vegetales

    OpenAIRE

    Romay, Gustavo; Matehus, Juan; Gerstl, Armando; Rueda, Rodrigo; Santana, María A

    2006-01-01

    Con una historia de más de cinco décadas, los beneficios del cultivo de tejidos vegetales (CTV) no han llegado a los agricultores de las regiones más necesitadas. El problema radica en la complejidad y costo de aplicación de la técnica. En Venezuela, la yuca (Manihot esculenta Crantz) es cultivada en suelos marginales por agricultores de escasos recursos. Las limitaciones del cultivo son la carencia de semilla sana y los bajos niveles de rendimiento. Esta situación puede superarse mediante el...

  3. Cultura y globalizaci?n: la seguridad societal de la comunidad indigena Wayuu y la comercializaci?n de los tejidos tradicionales

    OpenAIRE

    Chaves Vivas, Claudia Patricia

    2017-01-01

    En un mundo globalizado, tendiente a la creciente homogenizaci?n y mercantilizaci?n cultural, la presente investigaci?n analiza el impacto que conlleva la comercializaci?n de bienes culturales con valor simb?lico sobre la seguridad societal de la comunidad ind?gena Wayuu, a partir de concebirla como amenaza para su identidad cultural, al incitar trasformaciones en la producci?n, elaboraci?n y simbolog?a de los tejidos tradicionales. El marco anal?tico utilizado, como metodolog?a que determina...

  4. Representación paramétrica de la transformada de Fourier de tejidos textiles Implementation of the parametric representation of the Fourier transform in fabrics

    Directory of Open Access Journals (Sweden)

    Yezid Torres Moreno

    2007-06-01

    Full Text Available La naturaleza periódica de las imágenes de tejido textil permite el uso de las técnicas de la transformación de Fourier rápida para su clasificación. Debido a los patrones de repetición dentro de las imágenes del tejido textil, es posible encontrar una forma relativamente fácil de descripción para su densidad espectral de energía. Un trabajo previamente publicado permite mostrar el uso de descriptores para el espectro de Fourier de las imágenes, en particular su eficiencia a la invarianza a la rotación, traslación y cambio de escala [1].Dichos descriptores mostraron ser muy efectivos para representar un tejido textil y pueden ser utilizados para caracterizar texturas cuasi¿periódicas mediante técnicas no destructivas en tiempo real e in situ. Muestras de texturas textiles son evaluadas con esta técnica de representación paramétrica con el propósito de analizar su robustez y reproducibilidad. Finalmente, un conjunto de tejidos textiles es sometido a este modelo con el objetivo de evaluar la posibilidad de utilizarlo para la clasificación, verificación y reconocimiento de formas.The periodic nature of the fabric images allows using fast Fourier transform techniques in image processing for its characterization. Due to the repetition of patterns inside the images of textile, is possible to find a form relatively easy of description in their energy spectrum. A recent work outlines a group of geometric descriptors for the Fourier spectrum of the images; looking for this efficiency to rotation, translation and scale change invariance [1]. These descriptors showed to be very effective to represent a textile fabric and can be used to characterize the quasi periodic textures in real time and in situ non destructive techniques. Samples of textile textures are tested to this technique of parametric representation with the purpose of analyzing their robustness and reproducibility. Finally, a set of textile fabrics is subjected to

  5. Papel de la vitamina D y su receptor (VDR) en tejido adiposo y su relación con el metabolismo de los hidratos de carbono

    OpenAIRE

    Muñoz Garach, Araceli

    2014-01-01

    El déficit de vitamina D es una patología frecuente que se relaciona con el desarrollo de diabetes y con las alteraciones de los sujetos con obesidad. La asociación de estas tres entidades no esta claramente establecida. Objetivos Cuantificar los niveles plasmáticos de vitamina D y la expresión de su receptor VDR en tejido adiposo de sujetos clasificados según su índice de masa corporal (IMC) y su perfil glucémico. Pacientes y métodos Se analizaron 119 sujetos y clasificados según...

  6. Feeding Dar es Salaam: a symbiotic food system perspective

    OpenAIRE

    Wegerif, Marc C.A.

    2017-01-01

    This thesis is a sociological analysis of the agri-food system that feeds most of the over four and a half million residents of the fast-growing city of Dar es Salaam in Tanzania. It is based on qualitative research that has generated a picture of the food system that supplies the important foods for the majority of residents of the city. The research took an actor orientated approach and started from urban eaters and then followed the food back through retailers, processors and transporters ...

  7. Interacción de los tejidos blandos sobre la salud del esqueleto durante el crecimiento: influencia de la actividad física Muscle bone-interaction during growth: influence of physical activity

    Directory of Open Access Journals (Sweden)

    G. Vicente-Rodríguez

    2010-09-01

    Full Text Available Para determinar el efecto independiente de los tejidos blandos sobre el contenido mineral óseo (BMC y la densidad (BMD, y como la actividad física (PA podría afectar a ésta relación, evaluamos longitudinalmente (3 años la composición corporal mediante DXA, y la condición física (PF en 26 niños activos y 16 sedentarios, todos ellos prepúberes cuando comenzó el estudio. Los niños activos presentaban ventajas significativas en el desarrollo de la condición física y de la masa magra (masa muscular comparados con los sedentarios. Igualmente, los niños activos acumularon más BMC en la región lumbar de la columna vertebral y en el total corporal y también más BMD en la región lumbar de la columna vertebral, en las extremidades inferiores y en el total corporal que sus compañeros sedentarios. Estos resultados sugieren que durante la pubertad, el desarrollo de la masa magra es el mejor predictor de la acumulación de masa ósea. Así mismo, la actividad física estimula la adquisición de masa ósea aumentando la masa muscular pero también mediante mecanismos independientes de la masa magra.

    KEY WORDS: salud del esqueleto, composición corporal, desarrollo, ejercicio.

     

    To determine the independent effect of soft tissues on bone mineral content (BMC and density (BMD, and how physical activity (PA could affect these relationships, body composition by DXA, and the physical fitness (PF were assessed longitudinally (3-yr in 26 active and 16 non-active prepubertal boys. Significant advantage in the development of PF, muscle mass and total and lumbar spine BMC and total, lumbar spine and lower-limb BMD were found in the active compared with non-active boys.  Results imply that during puberty, lean mass development is the best predictor of bone mass accrual; and physical activity promotes bone acquisition by increasing lean mass but also

  8. La violencia de hijos adolescentes contra sus progenitores La violencia de hijos adolescentes contra sus progenitores

    Directory of Open Access Journals (Sweden)

    Concepción Aroca Montolío

    2013-10-01

    Full Text Available According to Prosecutor’s Office of the Minor, the accusation interposed by mothers and/or fathers victims by theirs children, along 2007 were 2603, in 2008 amounted 4.211, in 2009 there were 5.209 and in 2010 there were 8.000 accusations. Suede this worrying increase, the principal aim of our article is to check the scientific international and national documentation, from 1957 until the year 2010 that analyses the phenomenon of the adolescent violence against parents, to achieve an approximation to its keys that there allows us the comprehension and analysis of this serious familiar problem. For it we will analyse: (a the importance of this crime by means of criminological mediators: prevalence and incidence; (b the age and sex variables’ aggressors to be able to establish a basic profile about theirs and, (c the violence types that the teenagers wield to damage, prejudice and suffering against their progenitors, with the aim to obtain what they want. The information obtained in this research review and qualitative analysis, change in base to the methodology used and the type of sample under study to obtain conclusions. Even though, we wantto do research into needs to investigate this type of familiar violence, and from there, to do researches with rigorous scientific methodologies, unifying criteria and variables to be investigating, to be able to anticipate in this increasing problem that the parents have. Según la Fiscalía del Menor en el año 2007, las denuncias interpuestas por madres y/o padres, víctimas de malos tratos por sus hijos e hijas menores de edad, fueron 2.683. En 2008 ascendieron a 4.211, en 2009 se presentaron 5.209 y en el año 2010 se registraron 8.000 denuncias. Ante éste preocupante incremento, el objetivo principal de nuestro artículo es revisar la documentación científica que analiza la violencia filio-parental,  desde 1957 hasta el año 2011, para lograr una aproximación a sus claves que nos permita la

  9. Performance testing of LiDAR exploitation software

    Science.gov (United States)

    Varela-González, M.; González-Jorge, H.; Riveiro, B.; Arias, P.

    2013-04-01

    Mobile LiDAR systems are being used widely in recent years for many applications in the field of geoscience. One of most important limitations of this technology is the large computational requirements involved in data processing. Several software solutions for data processing are available in the market, but users are often unknown about the methodologies to verify their performance accurately. In this work a methodology for LiDAR software performance testing is presented and six different suites are studied: QT Modeler, AutoCAD Civil 3D, Mars 7, Fledermaus, Carlson and TopoDOT (all of them in x64). Results depict as QTModeler, TopoDOT and AutoCAD Civil 3D allow the loading of large datasets, while Fledermaus, Mars7 and Carlson do not achieve these powerful performance. AutoCAD Civil 3D needs large loading time in comparison with the most powerful softwares such as QTModeler and TopoDOT. Carlson suite depicts the poorest results among all the softwares under study, where point clouds larger than 5 million points cannot be loaded and loading time is very large in comparison with the other suites even for the smaller datasets. AutoCAD Civil 3D, Carlson and TopoDOT show more threads than other softwares like QTModeler, Mars7 and Fledermaus.

  10. Inmigrantes andinos en Madrid: Sus danzas y sus músicas tradicionales

    Directory of Open Access Journals (Sweden)

    Lourdes Morales

    2007-01-01

    Full Text Available In our urban context we get in touch with people that have been forced to leave their countries under different circumstances in order to live in Spain. This article analyses their wish to maintain a group identity and how this identity is materialized by some individuals through traditional dance and music. The study is intended as a framework for subsequent educational investigations that relate that cultural reality with the situation in secondary schools where children of Latin American immigrants study.Nuestro entorno ciudadano inmediato nos pone en contacto diario con personas que por diferentes razones se han visto obligadas a dejar sus países de origen para instalarse en España. Este artículo analiza el deseo que surge en ellas de mantener una identidad de grupo, y cómo ésta se concreta en ciertos individuos mediante manifestaciones de danza y música popular tradicional. El estudio pretende servir de marco para ulteriores investigaciones educativas que vinculen esa realidad cultural con la situación de institutos de enseñanza secundaria en los que estudian hijos de inmigrantes latinoamericanos.

  11. Desnutrición intrahospitalaria: ELAN - ECUADOR. Hospital Darío Machuca Palacios. La Troncal. Provincia del Cañar. 2011

    OpenAIRE

    Villavicencio Barriga, Verónica Dayana

    2012-01-01

    Este estudio determinó la Prevalencia de Desnutrición y sus determinantes sociodemográficos, de condición clínico-quirúrgica, hospitalización y calidad de atención en el Hospital Darío Machuca Palacios la Troncal. Se realizó un estudio no experimental de tipo transversal donde se encuestaron 150 pacientes mayores de 18 años, con una historia clínica abierta y diagnóstico definido. El estudio se condujo en 2 fases. La primera fue una auditoría de la historia clínica, con el que se determinó...

  12. Cobertura radicular mediante la utilización de un injerto subepitelial de tejido conectivo combinado con un colgajo pediculado avanzado coronalmente

    Directory of Open Access Journals (Sweden)

    Antonio Díaz Caballero

    2010-01-01

    Full Text Available Las recesiones gingivales son un hallazgo clínico muy frecuente que ocasionan problemas estéticos, hipersensibilidad dentaria y dificultad para llevar a cabo una correcta higiene oral en los pacientes. Uno de los objetivos de la terapia periodontal es corregir quirúrgicamente las recesiones; se han descrito una variedad de enfoques quirúrgicos como métodos efectivos para cubrir las superficies radiculares expuestas, siendo el injerto libre de tejido conectivo una de las técnicas que hoy en día ofrece un buen porcentaje de éxito y predecibilidad. Se presenta el caso de un paciente con retracción del margen gingival en el maxilar superior derecho; se describe el procedimiento quirúrgico usando una técnica bilaminar empleando un injerto subepitelial de tejido conectivo bajo un colgajo de espesor parcial posicionado coronalmente, y se obtienen buenos resultados estéticos y cobertura radicular.

  13. Hilvanar tecnologías digitales y procesos de tejido o costura artesanal: una revisión crítica de prácticas

    Directory of Open Access Journals (Sweden)

    Tania Pérez-Bustos

    2017-01-01

    Full Text Available El presente artículo hace una revisión de algunas tecnologías digitales diseñadas en torno a prácticas artesanales de tejido, bordado y costura. Esta revisión busca identificar las tensiones y encuentros que existen entre los saberes asociados a lo textil y artesanal, y los relativos a la tecnología y la informática. En particular, el artículo se enfoca en tres tipos de diseño de tecnologías de la información: en primera instancia, en aquel orientado a la construcción de repositorios digitales de prácticas textiles artesanales; en segundo lugar, en el desarrollo de interfaces tangibles de usuario inspiradas en la materialidad de lo textil y, por último, en iniciativas que, para idear tecnologías digitales, se centran en el potencial creativo de los lenguajes-materiales de la producción textil artesanal. El artículo se cierra con una reflexión establecida en torno a las posibilidades de co-aprendizaje que emergen de los encuentros que se dan entre tecnología digital y tejido o bordado artesanal.

  14. Círculo virtuoso de la educación empresarial: una propuesta de modelo para el desarrollo de un tejido empresarial de calidad

    Directory of Open Access Journals (Sweden)

    John Orlando Crissien Castillo

    2008-08-01

    Full Text Available En este artículo se presentan avances de investigación científica referente al tema de la educación empresarial como ente detonador de la creación de empresas de los denominados EBU, Empresarios de Base Universitaria. Así mismo, presenta una propuesta de modelo de desarrollo económico basado en la educación empresarial como ente generador de un tejido empresarial de calidad. El objetivo principal es aportar a la investigación científica en el tema de la creación de empresas en el marco de la teoría Institucional de North, específicamente en países con economías emergentes como Colombia y en donde no se han realizado muchos avances investigativos desde lo científico (Bruton, Ahlstrom, Obloj 2008. Los objetivos específicos que presenta el artículo incluyen la presentación de algunos avances de la investigación empírica paor parte del autor de la definición de tejido empresarial de calidad y educación empresarial basado en los estudios de Santos y Liñán (2005, además de la revisión bibliográfica principal del ET&P Entrepreneurship Theory and Practica Journal.

  15. 2011-2013 Indiana Statewide Imagery and LiDAR Program: Lake Michigan Watershed Counties

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Indiana's Statewide LiDAR data is produced at 1.5-meter average post spacing for all 92 Indiana Counties covering more than 36,420 square miles. New LiDAR data was...

  16. Diversity arrays technology (DArT) markers in apple for genetic linkage maps

    NARCIS (Netherlands)

    Schouten, H.J.; Weg, van de W.E.; Carling, J.; Khan, S.A.; McKay, S.J.; Kaauwen, van M.P.W.

    2012-01-01

    Diversity Arrays Technology (DArT) provides a high-throughput whole-genome genotyping platform for the detection and scoring of hundreds of polymorphic loci without any need for prior sequence information. The work presented here details the development and performance of a DArT genotyping array for

  17. Investigating assumptions of crown archetypes for modelling LiDAR returns

    NARCIS (Netherlands)

    Calders, K.; Lewis, P.; Disney, M.; Verbesselt, J.; Herold, M.

    2013-01-01

    LiDAR has the potential to derive canopy structural information such as tree height and leaf area index (LAI), via models of the LiDAR signal. Such models often make assumptions regarding crown shape to simplify parameter retrieval and crown archetypes are typically assumed to contain a turbid

  18. Anti-diabetic drugs in the private and public sector in Dar es Salaam ...

    African Journals Online (AJOL)

    Objectives: To compare availability, cost, affordability and sources of anti-diabetic drugs between private and public health facilities in Dar es Salaam, Tanzania. Design: Cross sectional descriptive study. Setting: Diabetic clinics in private and public health facilities in Dar es Salaam, Tanzania. Subjects: Eighty patients ...

  19. Wayne and Washtenaw Counties 1.0 PPSM LiDAR

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — TASK NAME: Wayne and Washtenaw Counties 1.0 PPSM LiDAR LiDAR Data Acquisition and Processing Production Task USGS CONTRACT: 07CRCN0006 TASK ORDER NUMBER: G09PD00300...

  20. Status and prospects for LiDAR remote sensing of forested ecosystems

    Science.gov (United States)

    M. A. Wulder; N. C. Coops; A. T. Hudak; F. Morsdorf; R. Nelson; G. Newnham; M. Vastaranta

    2013-01-01

    The science associated with the use of airborne and satellite Light Detection and Ranging (LiDAR) to remotely sense forest structure has rapidly progressed over the past decade. LiDAR has evolved from being a poorly understood, potentially useful tool to an operational technology in a little over a decade, and these instruments have become a major success story in...

  1. 47 CFR 25.401 - Satellite DARS applications subject to competitive bidding.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Satellite DARS applications subject to competitive bidding. 25.401 Section 25.401 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Competitive Bidding Procedures for DARS § 25.401...

  2. Remote sensing of Sonoran Desert vegetation structure and phenology with ground-based LiDAR

    Science.gov (United States)

    Sankey, Joel B.; Munson, Seth M.; Webb, Robert H.; Wallace, Cynthia S.A.; Duran, Cesar M.

    2015-01-01

    Long-term vegetation monitoring efforts have become increasingly important for understanding ecosystem response to global change. Many traditional methods for monitoring can be infrequent and limited in scope. Ground-based LiDAR is one remote sensing method that offers a clear advancement to monitor vegetation dynamics at high spatial and temporal resolution. We determined the effectiveness of LiDAR to detect intra-annual variability in vegetation structure at a long-term Sonoran Desert monitoring plot dominated by cacti, deciduous and evergreen shrubs. Monthly repeat LiDAR scans of perennial plant canopies over the course of one year had high precision. LiDAR measurements of canopy height and area were accurate with respect to total station survey measurements of individual plants. We found an increase in the number of LiDAR vegetation returns following the wet North American Monsoon season. This intra-annual variability in vegetation structure detected by LiDAR was attributable to a drought deciduous shrub Ambrosia deltoidea, whereas the evergreen shrub Larrea tridentata and cactus Opuntia engelmannii had low variability. Benefits of using LiDAR over traditional methods to census desert plants are more rapid, consistent, and cost-effective data acquisition in a high-resolution, 3-dimensional context. We conclude that repeat LiDAR measurements can be an effective method for documenting ecosystem response to desert climatology and drought over short time intervals and at detailed-local spatial scale.

  3. Flood Modeling Using a Synthesis of Multi-Platform LiDAR Data

    Directory of Open Access Journals (Sweden)

    Ryan M. Csontos

    2013-09-01

    Full Text Available This study examined the utility of a high resolution ground-based (mobile and terrestrial Light Detection and Ranging (LiDAR dataset (0.2 m point-spacing supplemented with a coarser resolution airborne LiDAR dataset (5 m point-spacing for use in a flood inundation analysis. The techniques for combining multi-platform LiDAR data into a composite dataset in the form of a triangulated irregular network (TIN are described, and quantitative comparisons were made to a TIN generated solely from the airborne LiDAR dataset. For example, a maximum land surface elevation difference of 1.677 m and a mean difference of 0.178 m were calculated between the datasets based on sample points. Utilizing the composite and airborne LiDAR-derived TINs, a flood inundation comparison was completed using a one-dimensional steady flow hydraulic modeling analysis. Quantitative comparisons of the water surface profiles and depth grids indicated an underestimation of flooding extent, volume, and maximum flood height using the airborne LiDAR data alone. A 35% increase in maximum flood height was observed using the composite LiDAR dataset. In addition, the extents of the water surface profiles generated from the two datasets were found to be statistically significantly different. The urban and mountainous characteristics of the study area as well as the density (file size of the high resolution ground based LiDAR data presented both opportunities and challenges for flood modeling analyses.

  4. University of Dar es Salaam Library Journal - Vol 9, No 1 (2007)

    African Journals Online (AJOL)

    Gender Analysis Of Electronic Information Resource Use: The Case Of The University Of Dar Es Salaam, Tanzania · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL ... A Bibliometric Study Of Research On Dar Es Salaam Region: 1980 To 2003 · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  5. Airborne LiDAR reflective linear feature extraction for strip adjustment and horizontal accuracy determination.

    Science.gov (United States)

    2009-02-01

    ODOT's Office of Aerial Engineering (OAE) has been using an Opetch 30/70 ALTM airborne LiDAR system for about four years. The introduction of LiDAR technology was a major development towards improving the mapping operations. The overall experiences a...

  6. Jean Lafitte 2013, 1.0 Meter LiDAR, Classified point cloud

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Light Detection and Ranging (LiDAR) dataset is a survey of the Jean Lafitte,G13PD00214, 1.0 Meter LiDAR Survey Area in south of New Orleans and encompasses 77...

  7. The Typology of Female Sex Workers in Dar-es-Salaam ...

    African Journals Online (AJOL)

    Objective: To establish the categories of female sex workers in Dar es Salaam. Methods: We conducted in depth-interviews with 32 female sex workers (FSWs) in five geographic areas of Dar-es-Salaam known to be the primary residential and working places, three local government leaders in three of the five areas known ...

  8. Epidemiological Studies on Bovine Mastitis in Smallholder Dairy Herds in the Dar es Salaam Region, Tanzania

    NARCIS (Netherlands)

    Kivaria, F.M.

    2006-01-01

    Recently the number of milking cows has increased substantially in the Dar es Salaam region due to an increasing demand for fresh milk in this densely populated urban centre. It is estimated that there are 1,765 smallholder dairy herds with 8,233 improved dairy animals in and around the Dar es

  9. Mapping of landslides under dense vegetation cover using object - oriented analysis and LiDAR derivatives

    NARCIS (Netherlands)

    Van Den Eeckhout, Miet; Kerle, N.; Hervas, Javier; Supper, Robert; Margottini, C.; Canuti, P.; Sassa, K.

    2013-01-01

    Light Detection and Ranging (LiDAR) and its wide range of derivative products have become a powerful tool in landslide research, particularly for landslide identification and landslide inventory mapping. In contrast to the many studies that use expert-based analysis of LiDAR derivatives to identify

  10. Comparisons between field- and LiDAR-based measures of stand structrual complexity

    Science.gov (United States)

    Van R. Kane; Robert J. McGaughey; Jonathan D. Bakker; Rolf F. Gersonde; James A. Lutz; Jerry F. Franklin

    2010-01-01

    Forest structure, as measured by the physical arrangement of trees and their crowns, is a fundamental attribute of forest ecosystems that changes as forests progress through successional stages. We examined whether LiDAR data could be used to directly assess the successional stage of forests by determining the degree to which the LiDAR data would show the same relative...

  11. Quantifying aboveground forest carbon pools and fluxes from repeat LiDAR surveys

    Science.gov (United States)

    Andrew T. Hudak; Eva K. Strand; Lee A. Vierling; John C. Byrne; Jan U. H. Eitel; Sebastian Martinuzzi; Michael J. Falkowski

    2012-01-01

    Sound forest policy and management decisions to mitigate rising atmospheric CO2 depend upon accurate methodologies to quantify forest carbon pools and fluxes over large tracts of land. LiDAR remote sensing is a rapidly evolving technology for quantifying aboveground biomass and thereby carbon pools; however, little work has evaluated the efficacy of repeat LiDAR...

  12. FY12 St Johns River Water Management LiDAR Survey: Putnam (FL)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Light Detection and Ranging (LiDAR) dataset is a survey of the FY12 St Johns River Water Management LiDAR Survey, project area in north-central Florida and...

  13. Using satellite and airborne LiDAR to model woodpecker habitat occupancy at the landscape scale

    Science.gov (United States)

    Lee A. Vierling; Kerri T. Vierling; Patrick Adam; Andrew T. Hudak

    2013-01-01

    Incorporating vertical vegetation structure into models of animal distributions can improve understanding of the patterns and processes governing habitat selection. LiDAR can provide such structural information, but these data are typically collected via aircraft and thus are limited in spatial extent. Our objective was to explore the utility of satellite-based LiDAR...

  14. Injerto de tejido conectivo subpediculado con utilización de hidroxiapatita para aumento de reborde alveolar: reporte de un caso

    Directory of Open Access Journals (Sweden)

    Antonio José Díaz Caballero

    2013-10-01

    Full Text Available ResumenLa reconstrucción quirúrgica de rebordes atrofiados mediante injertos de tejido conectivo y la hidroxiapatita es una opción que permite la fijación de los implantes de manera estética y funcional, ofrece un resultado previsible con bajas tasas de morbilidad y una ganancia notable de tejido óseo y tejidos blandos, gracias a su alta biocompatibilidad, alta capacidad de regeneración del tejido, una perfecta integración y elevados resultados, bajo riesgo de infección y ausencia de signos de rechazo. Presentamos el caso de una paciente con una pérdida ósea marcada en la zona anterior del maxilar, secundaria a procesos inflamatorios periodontales con la posterior pérdida de órganos dentarios prematuros, lo que conlleva a una perdida ósea. Se le realizó la cirugía tomando porciones de tejido conectivo donadas por el mismo paciente con la posterior utilización de hidroxiapatita porosa en la zona receptora para así lograr el aumento del reborde que se encontraba atrófico.Se constatan buenos resultados como respuesta biológica al material y al procedimiento, con una adecuada respuesta clínica y radiográfica, por lo que se recomienda el uso de este material en el tratamiento de defectos óseos bucofaciales por su biocompatibilidad, debido a su similitud con el hueso. Considerando así que se abren nuevos horizontes con la utilización de este material en este tipo de afección. (Duazary 2008; 1: 48 - 55AbstractSurgical reconstruction of atrophies residual ridges by use of connective tissue grafts plus hydroxyapatite is an option that allows the implant fixation in an esthetic and functional manner, offers a predictable outcome with low rates of morbidity and a remarkable gain of bone and soft tissue, Thanks to its high biocompatibility, high capacity for regeneration of tissue, a perfect integration and high performance, low risk of infection and the absence of signs of rejection. In this paper we present the case of a patient

  15. Registration of vehicle based panoramic image and LiDAR point cloud

    Science.gov (United States)

    Chen, Changjun; Cao, Liang; Xie, Hong; Zhuo, Xiangyu

    2013-10-01

    Higher quality surface information would be got when data from optical images and LiDAR were integrated, owing to the fact that optical images and LiDAR point cloud have unique characteristics that make them preferable in many applications. While most previous works focus on registration of pinhole perspective cameras to 2D or 3D LiDAR data. In this paper, a method for the registration of vehicle based panoramic image and LiDAR point cloud is proposed. Using the translation among panoramic image, single CCD image, laser scanner and Position and Orientation System (POS) along with the GPS/IMU data, precise co-registration between the panoramic image and the LiDAR point cloud in the world system is achieved. Results are presented under a real world data set collected by a new developed Mobile Mapping System (MMS) integrated with a high resolution panoramic camera, two laser scanners and a POS.

  16. Proliferación de células madres mesenquimales obtenidas de tejido gingival humano sobre una matriz de quitosano: estudio in vitro Proliferation of mesenchymal stem cells from human gingival tissue on chitosan scaffold: an in vitro study

    OpenAIRE

    B M Hernández; V C Inostroza; A F Carrión; P A Chaparro; H A Quintero; R A Sanz

    2011-01-01

    Objetivo: Comprobar la proliferación de células madres mesenquimales (MSCs) provenientes de tejido conjuntivo gingival humano sobre una matriz de quitosano. Método: Estudio experimental in vitro en el cual se aislaron MSCs a partir de cultivos por explante de tejido conjuntivo gingival. La presencia de MSCs, se caracterizó mediante citometría de flujo, utilizando para ello anticuerpos CD34, CD45, CD73, CD90, CD105, diferenciación hacia tres linajes celulares: adipocitos, osteoblastos y condro...

  17. Biocompatibilidad de Células Madres Mesenquimales de Tejido Gingival Humano en Cultivoconun Andamiaje de Polímero Sintético de Ácido Poliláctico (OPLA)

    OpenAIRE

    Brizuela Cordero, Claudia; Saint Jean, Nicole; Inostroza Silva, Carolina

    2014-01-01

    La ingeniería tisular se plantea como tratamiento ideal para la regeneración de tejidos con la utilización de andamiajes, células madres y factores de crecimiento. Las células madres de origen gingival plantean ventajas de obtención, mientras que el OPLA 3D permite cultivos de alta densidad celular. El objetivo de esta investigación fue evaluar la biocompatibilidad de células madres de origen gingival en OPLA. Las células se obtuvieron de tejido gingival y fueron caracterizadas fenotípica y f...

  18. EFICACIA DE LA COMBINACIÓN DEL INJERTO LIBRE DE TEJIDO CONECTIVO Y LA TÉCNICA DE ALLEN EN EL TRATAMIENTO DE LA RECESIÓN GINGIVAL CLASE II DE MILLER EN PACIENTES DE LA CONSULTA PRIVADA. AREQUIPA. 2012

    OpenAIRE

    LUJAN VALENCIA, SARA

    2015-01-01

    RECESIÓN GINGIVAL CONCEPTO FACTORES ETIOLÓGICOS SÍNTOMAS CLÍNICOS DIAGNÓSTICO CLASIFICACIÓN DE LA RECESIÓN PAPEL DE LA ENCÍA QUERATINIZADA EN LA CONSERVACIÓN DE LA SALUD GINGIVAL CONDICIONES NECESARIAS PARA EL ÉXITO DEL RECUBRIMIENTO RADICULAR TRATAMIENTO DE LAS RECESIONES GINGIVALES TRATAMIENTO CONSERVADOR TRATAMIENTO QUIRÚRGICO INJERTO LIBRE DE TEJIDO CONECTIVO Y LA TÉCNICO DE ALLEN INJERTO LIBRE DE TEJIDO CONECTIVO TÉCNICA QUIRÚRGICA BIOMODIFICACIÓN DE LA SUPERFICIE RADICULAR TÉCNICA DE AL...

  19. TÉCNICA NO CONVENCIONAL DE EXTRACCIÓN DE ADN A PARTIR DE TEJIDO EMBEBIDO EN PARAFINA PARA USO EN LA REACCIÓN EN CADENA DE LA POLIMERASA

    OpenAIRE

    Meza, Giovanna; Ulloa, Juan Carlos; Uribe, Ana María; Gutiérrez, María Fernanda

    2013-01-01

    Los tejidos embebidos en parafina son muestras que reposan en los bancos de patología y almacenan importante información genética, útil para estudios retrospectivos de epidemiología y de patología molecular y para el diagnóstico de enfermedades en humanos y en animales. Dentro de las metodologías descritas para extraer ADN de tejidos en parafina, pocas resultan exitosas a la hora de obtener un material genético, con la cual se pueda amplificar fragmentos superiores a 200pb, por la técnica de ...

  20. Tejido óseo y apósito biológico esterilizados con gas óxido de etileno Tesis presentada en opción al grado científico Doctor en Ciencias Médicas

    OpenAIRE

    Jacas Torné, Manuel

    2014-01-01

    Introducción: En Cuba tradicionalmente se ha empleado las radiaciones Gamma para esterilizar el tejido óseo y la piel porcina. Con el propósito de buscar una alternativa a su empleo se estudió el gas óxido de etileno (OtE), nunca antes empleado en Cuba con esos fines. Objetivo general: Evaluar la efectividad del gas óxido de etileno como método esterilizante del tejido óseo esponjoso y la piel porcina. Metodología de la investigación: Se realizó un estudio experimental In Vitro d...

  1. Fracción vascular estromal de tejido adiposo: cómo obtener células madre y su rendimiento de acuerdo a la topografía de las áreas donantes: estudio preliminar

    Directory of Open Access Journals (Sweden)

    K. A. Almeida

    Full Text Available La obtención de tejido adiposo supone un nuevo y prometedor mercado de trabajo para los cirujanos plásticos, ya que los bancos de tejidos escogerán de forma acertada la grasa como el medio más fácil para obtener fuentes de células madre de alto rendimiento, en la medida en que este tejido es capaz de producir al menos cinco veces más unidades formadores de colonias (UFCs que la médula ósea. El objetivo del presente trabajo es mostrar lo que se puede esperar del tejido adiposo como origen de células adultas de fracción vacular estromal (FVE, y señalar las mejores áreas del cuerpo humano para ser elegidas como donantes de tejido adiposo, extraído mediante liposucción. Describimos la rutina seguida para la obtención de células de FVE mediante la digestión de las muestras de tejido adiposo humano con colagenasa. En el momento de su recolección, esas células presentaban una viabilidad de 92+/- 1% basada en exclusión por Azul de Trypan. Las células de FVE recontadas después de permanecer 48 horas en medio de cultivo de Eagle modificado por Dulbecco (DMEM, dentro de una cámara de Neubauer, tras lo cual el rendimiento medio de las células de FVE fue de 7,2 +/- 1,3 x 103 células por mililitro de tejido lipoaspirado. En conclusión, pensamos que supone un desafío en la actualidad el mejorar las estrategias para la obtención de células de FVE. Este trabajo, por ahora preliminar, muestra que las células de FVE pueden ser fácilmente obtenidas por medio de lipoaspiración. La comparación entre las diferentes áreas donantes, mostró un rendimiento 22% más alto para las células de FVE cuando el tejido adiposo había sido obtenido del tronco, en comparación a cuando lo había sido de los miembros.

  2. A experiência da pesquisa EnsinaSUS The experience of EnsinaSUS research

    Directory of Open Access Journals (Sweden)

    Lilian Koifman

    2007-06-01

    Full Text Available Este artigo descreve a trajetória do projeto EnsinaSUS, da pesquisa desenvolvida em seu interior e das múltiplas dimensões e implicações na direção do conhecimento das experiências que têm sido realizadas nos cursos da área de saúde em relação aos processos de mudança que estão em desenvolvimento. Pretendemos compartilhar a experiência de integração de pesquisadores, de diferentes origens institucionais e profissionais, na construção de um projeto comum, alimentado da vivência desses atores. Essa experiência almejou inovar e construir uma nova gramática para discussão e compreensão dos processos pedagógicos e sua interface com a saúde e o trabalho, na produção de um cuidado que se faça distinto na concepção da assistência à saúde, produzindo cuidado usuário-centrado, numa perspectiva dialógica e ético-política. Entendemos que as práticas de ensino e extensão funcionam como dispositivos abertos de um 'fazer-pensar-saber' em integralidade, forjando novas concepções, sentidos e significados da saúde, da vida, do conhecimento e da educação. Pautamo-nos na idéia de que as explicações da práxis pedagógica podem ser entendidas como possibilidade da construção histórica da cidadania. Encontramos alguns mecanismos de legitimação e canais de articulação, intercâmbio e solidariedade como resposta de interação de diversidades. A equipe representou a composição de redes de representação em espaços culturais e políticos plurais.This article describes the EnsinaSUS Project, the research developed within the project, and the various dimensions and implications that will lead to understanding the experiences that have been taking place in courses in the field of health care as regards their processes of change. Our aim is to share the experience of integrating researchers, coming from different institutional and professional backgrounds, in order to build a common project, based on their

  3. ElecSus: Extension to arbitrary geometry magneto-optics

    Science.gov (United States)

    Keaveney, James; Adams, Charles S.; Hughes, Ifan G.

    2018-03-01

    We present a major update to ElecSus, a computer program and underlying model to calculate the electric susceptibility of an alkali-metal atomic vapour. Knowledge of the electric susceptibility of a medium is essential to predict its absorptive and dispersive properties. In this version we implement several changes which significantly extend the range of applications of ElecSus, the most important of which is support for non-axial magnetic fields (i.e. fields which are not aligned with the light propagation axis). Supporting this change requires a much more general approach to light propagation in the system, which we have now implemented. We exemplify many of these new applications by comparing ElecSus to experimental data. In addition, we have developed a graphical user interface front-end which makes the program much more accessible, and have improved on several other minor areas of the program structure.

  4. Strategies for sustainable households. The SusHouse project

    International Nuclear Information System (INIS)

    Vergragt, Ph.J.; Knot, J.M.C.

    2001-01-01

    The international SusHouse project has developed a strategy design approach that can contribute to major (factor 20) efficiency improvements in household activities. Stakeholder workshops have been held to develop scenarios for a sustainable future (2050). These scenarios were evaluated on their economic consequences, environmental impacts and consumer acceptance. the results were then used as the input for a second round of stakeholder workshops, which aimed at developing short-term strategies and implementation plans. This Research Note reviews the SusHouse approach and its results. It ends with suggestions for further steps to be taken. A SusHouse CD-ROM is available, containing all final project reports as well as a scenario presentation in the form of images and short texts. 22 refs

  5. Canopy wake measurements using multiple scanning wind LiDARs

    Science.gov (United States)

    Markfort, C. D.; Carbajo Fuertes, F.; Iungo, V.; Stefan, H. G.; Porte-Agel, F.

    2014-12-01

    Canopy wakes have been shown, in controlled wind tunnel experiments, to significantly affect the fluxes of momentum, heat and other scalars at the land and water surface over distances of ˜O(1 km), see Markfort et al. (EFM, 2013). However, there are currently no measurements of the velocity field downwind of a full-scale forest canopy. Point-based anemometer measurements of wake turbulence provide limited insight into the extent and details of the wake structure, whereas scanning Doppler wind LiDARs can provide information on how the wake evolves in space and varies over time. For the first time, we present measurements of the velocity field in the wake of a tall patch of forest canopy. The patch consists of two uniform rows of 40-meter tall deciduous, plane trees, which border either side of the Allée de Dorigny, near the EPFL campus. The canopy is approximately 250 m long, and it is approximately 40 m wide, along the direction of the wind. A challenge faced while making field measurements is that the wind rarely intersects a canopy normal to the edge. The resulting wake flow may be deflected relative to the mean inflow. Using multiple LiDARs, we measure the evolution of the wake due to an oblique wind blowing over the canopy. One LiDAR is positioned directly downwind of the canopy to measure the flow along the mean wind direction and the other is positioned near the canopy to evaluate the transversal component of the wind and how it varies with downwind distance from the canopy. Preliminary results show that the open trunk space near the base of the canopy results in a surface jet that can be detected just downwind of the canopy and farther downwind dissipates as it mixes with the wake flow above. A time-varying recirculation zone can be detected by the periodic reversal of the velocity near the surface, downwind of the canopy. The implications of canopy wakes for measurement and modeling of surface fluxes will be discussed.

  6. Building Contour Extraction Based on LiDAR Point Cloud

    Directory of Open Access Journals (Sweden)

    Zhang Xu-Qing

    2017-01-01

    Full Text Available This paper presents a new method for solving the problem of utilizing the LiDAR data to extract the building contour line. For detection of the edge points between the building test points by using the least squares fitting to get the edge line of buildings and give the weight determining of the building of edge line slope depend on the length of the edge line. And then get the weighted mean of the positive and negative slope of the building edge line. Based on the structure of the adjacent edge perpendicular hypothesis, regularization processing to extract the edge of the skeleton line perpendicular. The experiments show that the extracted building edges have the good accuracy and have the good applicability in complex urban areas.

  7. Moscas minadoras del girasol y sus enemigos naturales

    Directory of Open Access Journals (Sweden)

    VALLADARES, G

    2011-08-01

    Full Text Available Las “moscas minadoras” se caracterizan por excavar túneles (“minas” en el interior de las hojas, consumiendo el mesófilo y dejando intacta la epidermis foliar o, al menos, su pared externa. Hay especies cuyas larvas, en lugar de realizar estas galerías en las hojas, viven y se alimentan en el interior de otros tejidos vegetales,barrenando tallos, semillas, frutos, etc. Por consiguiente, y desde el punto de vista del posible control biológico de estos organismos perjudiciales, resulta de sumo interés el hecho de poder identificar las distintas especies a través del daño que efectúan a la planta hospedera. En consecuencia, se brinda una clave práctica para el reconocimiento de las especies asociadas al cultivo de girasol, a partir de la observación del daño y también una síntesis de la información disponible sobre cada una de ellas. Por último, y teniendo en cuenta que los enemigos naturales (particularmente los parasitoides, ejercen un efecto importante sobre las poblacionesde las moscas minadoras, se presenta información sobre los organismos benéficos asociados a agromícidos del girasol, como posibles agentes de regulación.

  8. Urban agriculture and Anopheles habitats in Dar es Salaam, Tanzania.

    Science.gov (United States)

    Dongus, Stefan; Nyika, Dickson; Kannady, Khadija; Mtasiwa, Deo; Mshinda, Hassan; Gosoniu, Laura; Drescher, Axel W; Fillinger, Ulrike; Tanner, Marcel; Killeen, Gerry F; Castro, Marcia C

    2009-05-01

    A cross-sectional survey of agricultural areas, combined with routinely monitored mosquito larval information, was conducted in urban Dar es Salaam, Tanzania, to investigate how agricultural and geographical features may influence the presence of Anopheles larvae. Data were integrated into a geographical information systems framework, and predictors of the presence of Anopheles larvae in farming areas were assessed using multivariate logistic regression with independent random effects. It was found that more than 5% of the study area (total size 16.8 km2) was used for farming in backyard gardens and larger open spaces. The proportion of habitats containing Anopheles larvae was 1.7 times higher in agricultural areas compared to other areas (95% confidence interval = 1.56-1.92). Significant geographic predictors of the presence of Anopheles larvae in gardens included location in lowland areas, proximity to river, and relatively impermeable soils. Agriculture-related predictors comprised specific seedbed types, mid-sized gardens, irrigation by wells, as well as cultivation of sugar cane or leafy vegetables. Negative predictors included small garden size, irrigation by tap water, rainfed production and cultivation of leguminous crops or fruit trees. Although there was an increased chance of finding Anopheles larvae in agricultural sites, it was found that breeding sites originated by urban agriculture account for less than a fifth of all breeding sites of malaria vectors in Dar es Salaam. It is suggested that strategies comprising an integrated malaria control effort in malaria-endemic African cities include participatory involvement of farmers by planting shade trees near larval habitats.

  9. Delineation of peatland lagg boundaries from airborne LiDAR

    Science.gov (United States)

    Langlois, Melanie N.; Richardson, Murray C.; Price, Jonathan S.

    2017-09-01

    In Canada, peatlands are the most common type of wetland, but boundary delineation in peatland complexes has received little attention in the scientific literature. Typically, peatland boundaries are mapped as crisp, absolute features, and the transitional lagg zone—the ecotone found between a raised bog and the surrounding mineral land—is often overlooked. In this study, we aim (1) to advance existing approaches for detecting and locating laggs and lagg boundaries using airborne LiDAR surveys and (2) to describe the spatial distribution of laggs around raised bog peatlands. Two contrasting spatial analytical approaches for lagg detection were tested using five LiDAR-derived topographic and vegetation indices: topography, vegetation height, topographic wetness index, the standard deviation of the vegetation's height (as a proxy for the complexity of the vegetation's structure), and local indices of elevation variance. Using a dissimilarity approach (edge-detection, split-moving window analysis), no one variable accurately depicted both the lagg-mineral land and bog-lagg boundaries. Some indicators were better at predicting the bog-lagg boundary (i.e., vegetation height) and others at finding the lagg-mineral land boundary (i.e., topography). Dissimilarity analysis reinforces the usefulness of derived variables (e.g., wetness indices) in locating laggs, especially for those with weak topographic and vegetation gradients. When the lagg was confined between the bog and the adjacent upland, it took a linear form, parallel to the peatland's edge and was easier to predict. When the adjacent mineral land was flat or sloping away from the peatland, the lagg was discontinuous and intermittent and more difficult to predict.

  10. Colgajos Pediculados en Defectos de Tejidos Blandos en Niños. [Pedicled flaps for coverage of soft-tissue defects in children].

    Directory of Open Access Journals (Sweden)

    Javier Eduardo Nuñez

    2016-02-01

    Full Text Available Introducción: El objetivo de este trabajo es evaluar los resultados obtenidos con la utilización de colgajos pediculados utilizados para la cobertura de defectos de tejidos blandos en los miembros en niños. Material y Métodos: Se evaluaron retrospectivamente 13 niños que sufrieron traumatismo o quemadura de los miembros con pérdida o retracción severa de tejidos blandos, que requirieron de un colgajo pediculado para la adecuada cobertura del defecto, entre el año 2004 y 2013. La edad de los pacientes promedió 7.9 años. El tiempo entre el trauma inicial y la realización del colgajo promedió 39 días. La cobertura se realizó utilizando colgajo sural en cuatro casos, colgajo en isla vasculo-nervioso (Littler en dos casos, colgajo radial en dos casos, colgajo inguinal en tres casos, colgajo abdominal en un caso y colgajo dorsal ancho en un caso. En todos los casos se realizó la reparación o reconstrucción de las lesiones asociadas en el mismo tiempo quirúrgico. Resultados: El seguimiento de los pacientes promedió 19 meses. En los 13 casos se obtuvo buena cobertura del defecto a cubrir. El tiempo de internación promedió 8.1 días. Hubo una infección, una necrosis superficial y dos pacientes con cicatriz hipertrófica. Dos pacientes necesitaron tenolisis y dos zetaplastias. Todos los colgajos realizados en miembro inferior permitieron la vuelta a la actividad deportiva normal. Conclusión: A pesar del creciente número de colgajos libres descriptos para la reconstrucción de tejidos blandos, los colgajos pediculados permiten obtener una adecuada cobertura en la mayoría de estas lesiones en niños, ya que permiten buena cobertura tanto ósea como de tendones y estructuras vasculo-nerviosas, siendo posible la reconstrucción de las lesiones asociadas por debajo de los mismos sin inconvenientes. Entre las desventajas de la utilización de estos colgajos en adultos se nombran la inmovilización del miembro afectado, con una potencial

  11. AISLAMIENTO, CARACTERIZACIÓN Y POTENCIAL DE DIFERENCIACIÓN DE CÉLULAS MADRE MESENQUIMALES CANINAS DERIVADAS DE TEJIDO ADIPOSO

    Directory of Open Access Journals (Sweden)

    N. B. Riaño

    2014-01-01

    Full Text Available Se caracterizaron células obtenidas del tejido adiposo subcutáneo de caninos para demostrar su naturaleza de células madre mesenquimales (ad-MSCs. Las células se cultivaron y expan - dieron bajo condiciones in vitro . Se determinó la presencia de marcadores de superficie CD73, CD90 y CD105 por citometría de flujo y PCR en tiempo real, siendo idéntico el perfil de expresión obtenido al reportado en células madre mesenquimales humanas. Se demostró su potencial de diferenciación mediante análisis de expresión génica por PCR en tiempo real luego de inducirlas a procesos de diferenciación osteogénica y adipogénica. La capacidad de diferenciación osteogénica se evidenció a través de la expresión de genes de tejido óseo (colágeno tipo I y osteonectina en una cinética de expresión concordante con los eventos moleculares y celulares del desarrollo óseo in vivo . El potencial adipogénico se evaluó por la formación de vacuolas lipídicas intracelulares y la expresión del gen de lipoprotein-lipasa, acorde con el proceso in vivo . Se concluye que las células mesenquimales obtenidas del tejido adiposo de caninos cumplen los criterios morfológicos, de expresión de marcadores de superficie espe - cíficos y de capacidad de diferenciación mesodérmica, confirmando su naturaleza de células madre mesenquimales. Los resultados del presente trabajo indicaron que las ad-MSCs de los caninos son un excelente modelo preclínico para el desarrollo de aplicaciones en medicina regenerativa, tanto en medicina veterinaria, como en medicina humana.

  12. Acción fisiopatológica integrada de las hormonas sobre el tejido óseo: Physiopathological integrated action of hormones on the bone tissue

    Directory of Open Access Journals (Sweden)

    Julio César Sánchez Cruz

    2006-08-01

    Full Text Available La estatura definitiva que puede lograr un individuo, así como la adecuada salud e integración de su tejido óseo, dependen en gran medida de su constante interacción con las hormonas, desde la etapa embrionaria hasta los últimos momentos de la vida. Teniendo en cuenta que en los libros de texto la relación entre las hormonas con el hueso solo se describe de forma separada y sin integralidad entre lo fisiológico y lo patológico, se realiza una amplia revisión bibliográfica mediante la unificación de criterios y puntos de vista de diferentes autores, con el objetivo de lograr una comprensión más exacta de las funciones que realizan las hormonas sobre el tejido óseo y tener una visión más integral y razonada de la etiopatogenia de afecciones tales como la osteoporosis, las bajas y altas tallas (de causa endocrina y la craneosinostosis, entre otras. Se obtuvo como resultado un documento que explica, de forma más amena e integral, las acciones fisiopatológicas de las hormonas sobre el tejido óseo de un organismo vivo.The definitive height an individual can reach, as well as the adequate health and integration of his bone tissue depends in a great extent on his constant interaction with hormones from the embrionary stage to the last moments of his life. Taking into consideration that the relation between the hormones and the bone is only described in the textbooks in a separate way and with no integrality between the physiological and the pathological aspect, a wide bibliographic review is made by unifying criteria and points of view of different authors aimed at attaining a more accurate understanding of the functions of the hormones on the bone tissue, and at having a more comprehensive and reasoned vision of the etiopathogenesis of affections such as osteoporosis, short and tall stature (of endocrine cause and craniosinostosis, among others. As a result, it was obtained a document that explained in a clearer and more integral way

  13. Influencia de habitos alimentarios sobre las concentraciones de pesticidas organoclorados en tejido adiposo Influence of alimentary habits on organochlorine concentrations in adipose tissue

    Directory of Open Access Journals (Sweden)

    Ijoni Costabeber

    2002-01-01

    Full Text Available Fueron evaluados los niveles de residuos de pesticidas organoclorados (p,p'-DDE, HCB, gamma-HCH, aldrín presentes en 123 muestras de tejido adiposo mamario obtenidas de mujeres residentes en Córdoba (España. Además, se investigó la influencia de hábitos alimentarios y edad de las donantes sobre los niveles de organoclorados encontrados en el tejido. El p,p'-DDE fue el compuesto encontrado en concentraciones más altas (1,848myg/g, seguido de HCB (0,235mg/g, aldrín (0,005myg/g y gamma-HCH (0,003myg/g. Las donantes mayores presentaron niveles de p,p'-DDE, aldrín y HCB superiores que las más jóvenes. Sin embargo, la edad no influyó en los niveles de gamma-HCH. La mayoría de las donantes (40,65% indicaron las frutas como el alimento más consumido, seguido de la alimentación variada (34,15%, los legumbres (6,50%, los guisos y potajes (6,50%, las verduras (4,88%, la leche (3,25%, el pescado (2,44% y la carne (1,63%. Una correlación no significativa fue observada entre los niveles de organoclorados en el tejido adiposo y los hábitos alimentarios de las donantes.The levels of organochlorine pesticide residues (p,p'-DDE, HCB, gamma-HCH, aldrin present in adipose tissue samples from mammary glands of 123 women living in Cordoba (Spain were evaluated. The influence of alimentary habits and age of donors on organochlorine tissue levels was also investigated. The compound found at the highest concentration was p,p'-DDE (1.848mug/g, followed by HCB (0.235mug/g, aldrin (0.005mug/g and gamma-HCH (0.003mg/g. The older donors presented tissue levels of p,p'-DDE, aldrin and HCB higher than those found in younger donors. Conversely, age had no influence on tissue levels of gamma-HCH. The majority of donors (40.65% indicated fruits as the most consumed food, followed by mixed food (34.15%, non-green vegetables (6.50%, stewed meat and vegetables (6.50%, green vegetables (4.88%, milk (3.25%, fish (2.44% and meat (1.63%. No significant correlation was

  14. Food consumption and adipose tissue DDT levels in Mexican women Consumo de alimentos y niveles de DDT en tejido adiposo de mujeres mexicanas

    Directory of Open Access Journals (Sweden)

    Marcia Galván-Portillo

    2002-04-01

    Full Text Available This article analyzes food consumption in relation to levels of DDE (the principal metabolite of DDT in the adipose tissue of 207 Mexican women residing in States with high and low exposure to DDT. Data on the women's dietary habits and childbearing history were obtained from a personal interview. Adipose tissue DDE levels were measured by gas-liquid chromatography and compared by analysis of variance (ANOVA and multiple linear regression. Adipose tissue DDE levels increased significantly with age (p = 0.005 and residence in coastal areas (p = 0.002 and non-significantly with the consumption of onion, cauliflower, prickly pear, squash blossoms, sweet corn, broad beans, chili pepper sauce, ham, and fish. Even so, during breastfeeding there was a non-significant reduction in these levels. The findings suggest that certain foods serve as vehicles for DDE residues and confirm that breastfeeding is a mechanism for the elimination of this insecticide, which accumulates over the years in the human body.En este trabajo se presenta el consumo de alimentos en relación a los niveles de DDE (principal metabolito del DDT en tejido adiposo de 207 mujeres Mexicanas residentes en estados de alta y baja exposición a DDT. La información acerca de los hábitos dietéticos y la historia reproductiva de cada una de las participantes se indagaron mediante una entrevista personal. Los niveles de DDE en el tejido adiposo se determinaron por medio de cromatografía de gas-líquido y se compararon por medio de análisis de varianza (ANOVA y de regresión lineal múltiple. Los niveles de DDE en tejido adiposo se incrementaron significativamente de acuerdo a la edad (p = 0.005 y al hecho de residir en zonas costeras (p = 0,002 y, de manera no significativa, con el consumo de: cebolla, coliflor, nopal, flor de calabaza, elote, habas, salsas preparadas con chile, jamón y pescado. Asimismo, el aumento en los meses de lactancia representó una reducción no significativa

  15. Santa Teresa y sus cartas, historia de los sentimientos

    Directory of Open Access Journals (Sweden)

    Egido, Teófanes

    2015-12-01

    Full Text Available Historical reflection on a peculiar dimension of St. Teresa of Jesus: the expression of her feelings in her writings, particularly in her abundant letters. The article focuses on the sense of humor, the joyfulness, and the importance of laughter in St. Teresa language, and also on the feeling of endearment with her family, with her order, with fray Juan de la Cruz. Ample space is dedicated to the tenderness towards girls in her convents. St. Teresa of Jesus appears as transgressor of 16th century social behaviours.Reflexión histórica sobre una dimensión peculiar de santa Teresa de Jesús: la expresión de sus sentimientos en sus escritos, de forma más especial en sus cartas abundantes. El artículo se centra en el sentido del humor, de la alegría, en la importancia de la risa en el lenguaje de santa Teresa y en el sentimiento de ternura con su familia, con su orden, con fray Juan de la Cruz. Se dedica un espacio amplio a la ternura hacia las niñas en sus conventos. Aparece santa Teresa de Jesús como trasgresora de los comportamientos sociales del siglo XVI.

  16. Mitochondrial genome of Taiwan pig ( Sus Scrofa ) | Chen | African ...

    African Journals Online (AJOL)

    The purpose of this study is to investigate the complete nucleotide sequence of the mitochondrial genome of the Taiwan Lanyu pig (Sus scrofa) and its phylogenetic relationships with other pig breeds. Thirty-four forward and reverse primers were designed. Sequencing was performed in both directions. The results showed ...

  17. Important LiDAR metrics for discriminating forest tree species in Central Europe

    Science.gov (United States)

    Shi, Yifang; Wang, Tiejun; Skidmore, Andrew K.; Heurich, Marco

    2018-03-01

    Numerous airborne LiDAR-derived metrics have been proposed for classifying tree species. Yet an in-depth ecological and biological understanding of the significance of these metrics for tree species mapping remains largely unexplored. In this paper, we evaluated the performance of 37 frequently used LiDAR metrics derived under leaf-on and leaf-off conditions, respectively, for discriminating six different tree species in a natural forest in Germany. We firstly assessed the correlation between these metrics. Then we applied a Random Forest algorithm to classify the tree species and evaluated the importance of the LiDAR metrics. Finally, we identified the most important LiDAR metrics and tested their robustness and transferability. Our results indicated that about 60% of LiDAR metrics were highly correlated to each other (|r| > 0.7). There was no statistically significant difference in tree species mapping accuracy between the use of leaf-on and leaf-off LiDAR metrics. However, combining leaf-on and leaf-off LiDAR metrics significantly increased the overall accuracy from 58.2% (leaf-on) and 62.0% (leaf-off) to 66.5% as well as the kappa coefficient from 0.47 (leaf-on) and 0.51 (leaf-off) to 0.58. Radiometric features, especially intensity related metrics, provided more consistent and significant contributions than geometric features for tree species discrimination. Specifically, the mean intensity of first-or-single returns as well as the mean value of echo width were identified as the most robust LiDAR metrics for tree species discrimination. These results indicate that metrics derived from airborne LiDAR data, especially radiometric metrics, can aid in discriminating tree species in a mixed temperate forest, and represent candidate metrics for tree species classification and monitoring in Central Europe.

  18. Comparing RIEGL RiCOPTER UAV LiDAR Derived Canopy Height and DBH with Terrestrial LiDAR.

    Science.gov (United States)

    Brede, Benjamin; Lau, Alvaro; Bartholomeus, Harm M; Kooistra, Lammert

    2017-10-17

    In recent years, LIght Detection And Ranging (LiDAR) and especially Terrestrial Laser Scanning (TLS) systems have shown the potential to revolutionise forest structural characterisation by providing unprecedented 3D data. However, manned Airborne Laser Scanning (ALS) requires costly campaigns and produces relatively low point density, while TLS is labour intense and time demanding. Unmanned Aerial Vehicle (UAV)-borne laser scanning can be the way in between. In this study, we present first results and experiences with the RIEGL RiCOPTER with VUX ® -1UAV ALS system and compare it with the well tested RIEGL VZ-400 TLS system. We scanned the same forest plots with both systems over the course of two days. We derived Digital Terrain Model (DTMs), Digital Surface Model (DSMs) and finally Canopy Height Model (CHMs) from the resulting point clouds. ALS CHMs were on average 11.5 c m higher in five plots with different canopy conditions. This showed that TLS could not always detect the top of canopy. Moreover, we extracted trunk segments of 58 trees for ALS and TLS simultaneously, of which 39 could be used to model Diameter at Breast Height (DBH). ALS DBH showed a high agreement with TLS DBH with a correlation coefficient of 0.98 and root mean square error of 4.24 c m . We conclude that RiCOPTER has the potential to perform comparable to TLS for estimating forest canopy height and DBH under the studied forest conditions. Further research should be directed to testing UAV-borne LiDAR for explicit 3D modelling of whole trees to estimate tree volume and subsequently Above-Ground Biomass (AGB).

  19. Diseño y aplicación de hidrogeles basados en polisacáridos para ingeniería de tejido óseo

    OpenAIRE

    Medina, Lara; Cortizo, María Susana; Cortizo, Ana María

    2014-01-01

    El tejido óseo, a diferencia del cartílago, tiene la capacidad de reparar constantemente los microdaños que se producen en forma cotidiana; sin embargo, frente a fracturas de gran tamaño o pérdida ósea, puede ser necesaria la estabilización mecánica de la lesión, o bien el empleo de sistemas de “scaffolds” (andamiajes) que permitan el desarrollo osteoblástico para reparar la lesión. La estimulación de la producción ósea requerida para tratar la pérdida de hueso emplea estrategias basadas en t...

  20. Mapping river bathymetry with a small footprint green LiDAR: Applications and challenges

    Science.gov (United States)

    Kinzel, Paul J.; Legleiter, Carl; Nelson, Jonathan M.

    2013-01-01

    Airborne bathymetric Light Detection And Ranging (LiDAR) systems designed for coastal and marine surveys are increasingly sought after for high-resolution mapping of fluvial systems. To evaluate the potential utility of bathymetric LiDAR for applications of this kind, we compared detailed surveys collected using wading and sonar techniques with measurements from the United States Geological Survey’s hybrid topographic⁄ bathymetric Experimental Advanced Airborne Research LiDAR (EAARL). These comparisons, based upon data collected from the Trinity and Klamath Rivers, California, and the Colorado River, Colorado, demonstrated

  1. In-Field High-Throughput Phenotyping of Cotton Plant Height Using LiDAR

    OpenAIRE

    Shangpeng Sun; Changying Li; Andrew H. Paterson

    2017-01-01

    A LiDAR-based high-throughput phenotyping (HTP) system was developed for cotton plant phenotyping in the field. The HTP system consists of a 2D LiDAR and an RTK-GPS mounted on a high clearance tractor. The LiDAR scanned three rows of cotton plots simultaneously from the top and the RTK-GPS was used to provide the spatial coordinates of the point cloud during data collection. Configuration parameters of the system were optimized to ensure the best data quality. A height profile for each plot w...

  2. Genetic linkage mapping in an F2 perennial ryegrass population using DArT markers

    DEFF Research Database (Denmark)

    Tomaszewski, Céline; Byrne, Stephen; Foito, Alexandra

    2012-01-01

    Perennial ryegrass is the principal forage grass species used in temperate agriculture. In recent years, significant efforts have been made to develop molecular marker strategies to allow cost-effective characterization of a large number of loci simultaneously. One such strategy involves using DAr......T markers, and a DArT array has recently been developed for the Lolium-Festuca complex. In this study, we report the first use of the DArTFest array to generate a genetic linkage map based on 326 markers in a Lolium perenne F2 population, consisting of 325 genotypes. For proof of concept, the map was used...

  3. 4D Near Real-Time Environmental Monitoring Using Highly Temporal LiDAR

    Science.gov (United States)

    Höfle, Bernhard; Canli, Ekrem; Schmitz, Evelyn; Crommelinck, Sophie; Hoffmeister, Dirk; Glade, Thomas

    2016-04-01

    The last decade has witnessed extensive applications of 3D environmental monitoring with the LiDAR technology, also referred to as laser scanning. Although several automatic methods were developed to extract environmental parameters from LiDAR point clouds, only little research has focused on highly multitemporal near real-time LiDAR (4D-LiDAR) for environmental monitoring. Large potential of applying 4D-LiDAR is given for landscape objects with high and varying rates of change (e.g. plant growth) and also for phenomena with sudden unpredictable changes (e.g. geomorphological processes). In this presentation we will report on the most recent findings of the research projects 4DEMON (http://uni-heidelberg.de/4demon) and NoeSLIDE (https://geomorph.univie.ac.at/forschung/projekte/aktuell/noeslide/). The method development in both projects is based on two real-world use cases: i) Surface parameter derivation of agricultural crops (e.g. crop height) and ii) change detection of landslides. Both projects exploit the "full history" contained in the LiDAR point cloud time series. One crucial initial step of 4D-LiDAR analysis is the co-registration over time, 3D-georeferencing and time-dependent quality assessment of the LiDAR point cloud time series. Due to the high amount of datasets (e.g. one full LiDAR scan per day), the procedure needs to be performed fully automatically. Furthermore, the online near real-time 4D monitoring system requires to set triggers that can detect removal or moving of tie reflectors (used for co-registration) or the scanner itself. This guarantees long-term data acquisition with high quality. We will present results from a georeferencing experiment for 4D-LiDAR monitoring, which performs benchmarking of co-registration, 3D-georeferencing and also fully automatic detection of events (e.g. removal/moving of reflectors or scanner). Secondly, we will show our empirical findings of an ongoing permanent LiDAR observation of a landslide (Gresten

  4. Green infrastructure for flood risk management in Dar es Salaam and Copenhagen

    DEFF Research Database (Denmark)

    Mguni, Patience; Herslund, Lise Byskov; Jensen, Marina Bergen

    2015-01-01

    , a comparison of the opportunities and barriers to the implementation of SUDS in Dar es Salaam and Copenhagen is presented. The results indicate that a bottom-up approach in Dar es Salaam is important, with the community level taking the lead, while in Copenhagen the top-down approach currently employed......The risk of flooding in urban areas could be better approached by complementing conventional sewer systems with sustainable urban drainage systems (SUDS) for storm-water management. This may be the case for developing world cities like Dar es Salaam with incomplete sewer services, as well as cities...

  5. Los rostros de Ana: Tres comentarios sobre Darío Morales

    Directory of Open Access Journals (Sweden)

    Paul Marcelo Velázquez Sabogal

    2016-03-01

    Full Text Available El presente escrito es una aproximación a la obra del artista colombiano Darío Morales desde la perspectiva dialéctica “vida-muerte”, alentada por el acontecimiento de lo ambiguo y sus implicaciones en la deconstrucción de una corporeidad estable regida por parámetros sociales, jurídicos y biológicos que desembocan en la caracterización de un “otro” en el cual se encuentran figuras como el anormal, el incorregible, el monstruo. Desde ellos pretendo trazar un punto de vista sobre aquellos Rostros de Ana donde se manifiestan figuras como el onanista y la vampira, para desembocar en un comentario que amplíe el espectro de sentido alrededor la obra del artista cartagenero. Palabras claves Cuerpo ambiguo, vida-muerte, sagrado-profano, onanismo. Ñawekuna kai warmi Ana Sutipa: Kimsa pariai ksi runa Dario Morales Sugllapi Kai kilkai kame ñalla regcha kai tacha runa colombiano Dario Morales Kilkakasina rimangapa “ kausai- wamui” aida chingapa kaikuna Mana allilla llugsichu tukuikunamanda icharichu llanga “sug manda” Kaipe turrerreme ¡ kauancheme man aillakaska, man allilla rurasla! Kirú. Kaipi pudenchi kauanga imasami kauacheca kai warme Ana paipa ñawekuna Kai ruraikuna sutikame onanista Chasallata vampira, Kaiwa munakume Allilla intendechengapa imasame parlaku sug iacha Cartagenero. Ima suti Rimai Simi: Cuerpo ambiguo, kaugsai, muerte, sagrado - profano, onanismo. The Faces of Ana: Three Comments on Dario Morales Abstract This paper is an approach to the work of Colombian artist Dario Morales from the perspective of the dialectic of “life and death”, encouraged by the occurrence of the ambiguous and its implications for the deconstruction of a stable corporeality governed by social, legal and biological parameters that lead to the characterization of an “other”, in which figures such as the abnormal, the incorrigible, the monster are to be found. From them, I intend to plot a point of view on those faces of Ana

  6. Linfoma de celulas B de la zona marginal extraganglionar del tejido linfoide asociado a mucosa (linfoma MALT de pulmón

    Directory of Open Access Journals (Sweden)

    Carlos Vergara-Uzcategui

    2014-09-01

    Full Text Available Los Linfomas Pulmonares Primarios son extremadamente raros (0,4% de los linfomas extraganglionares, y generalmente son de tejido linfoide asociado a mucosas (tipo MALT, con ocasionales linfomas de células grandes difusos. Los síntomas son inespecíficos, y casi la mitad de los pacientes son asintomáticos. Se presenta el caso de un paciente masculino de 56 años de edad, quien presentó durante 7 meses accesos diarios de tos seca, de predominio nocturno, asociados en el último mes a fiebre de 39ºC, disnea a medianos esfuerzos y expectoración verduzca. Los exámenes de laboratorio fueron normales. La radiografía de tórax mostró el mediastino ensanchado, un proceso en lóbulo medio con efecto atelectásico, y un nódulo en hemitórax izquierdo. La tomografía computarizada (TC torácica de alta resolución evidenció proceso alveolar derecho en lóbulo medio y un nódulo pulmonar izquierdo calcificado de tipo inespecífico. El estudio inmunohistoquímico de la biopsia pulmonar fue compatible con Linfoma de Células B de la zona marginal extraganglionar del tejido linfoide asociado a mucosa (Linfoma MALT de pulmón. La TC corporal y la Tomografía por Emisión de Positrones (PET evidenciaron importantes hallazgos complementarios para determinar la extensión de la enfermedad. El paciente se trato con quimioterapia y actualmente se encuentra en buenas condiciones, sin recidiva de la sintomatología. Dado lo infrecuente de la patología se presenta este caso y se hace una revisión de la literatura

  7. Biomateriales utilizados en cirugía ortopédica como sustitutos del tejido óseo

    Directory of Open Access Journals (Sweden)

    Cristian Alexis Martinez

    2012-09-01

    Full Text Available El presente artículo analiza empleo de los biocerámicos en aplicaciones clínicas, como sustitutos óseos, desarrollos en Argentina y Europa, y los productos comerciales disponibles. Los cerámicos para este propósito son bioinertes, bioactivos o reabsorbibles. Estos se caracterizan por su biocompatibilidad, capacidad de degradación controlada, y liberación de iones biológicamente activos (Ca++ y PO4--- al medio fisiológico. Además, estos materiales presentan ventajas respecto al hueso de banco, tales como su disponibilidad, reproducibilidad de sus propiedades físicas, químicas y mecánicas; capacidad de absorción  y liberación paulatina de fármacos. Los biocerámicos constituyen un sustrato viable para cultivos celulares y el desarrollo de nuevas variantes de sustitutos óseos, que incorporen fases orgánicas.

  8. Inverse-FEM Characterization of a Brain Tissue Phantom to Simulate Compression and Indentation Caracterización de tejido cerebral artificial utilizando Inverse-FEM para simular indentación y comprensión

    Directory of Open Access Journals (Sweden)

    Elizabeth Mesa-Múnera

    2012-12-01

    Full Text Available The realistic simulation of tool-tissue interactions is necessary for the development of surgical simulators and one of the key element for it realism is accurate bio-mechanical tissue models. In this paper, we determined the mechanical properties of soft tissue by minimizing the difference between experimental measurements and the analytical or simulated solution of the deformation. Then, we selected the best model parameters that fit the experimental data to simulate a bonded compression and a needle indentation with a flat-tip. We show that the inverse FEM allows accurate material property estimation. We also validated our results using multiple tool-tissue interactions over the same specimen.Una simulación realista de la interacción tejido-herramienta es necesaria para desarrollar simuldores quirúrgicos, y la presición en modelos biomecánicos de tejidos es determinante para cumplir tal fin. Los trabajos previos han caracterizado las propiedades de tejidos blandos; sin embargo, ha faltado una validación apropiada de los resultados. En este trabajo se determinaron las propiedades mecánicas de un tejido blando minimizando la diferencia entre las mediciones experimentales y la solución analítica o simulada del problema. Luego, fueron seleccionados los parámetros que mejor se ajustaron a los datos experimentales para simular una compresión con fricción y la indentación de una aguja con punta plana. Se concluye que el inverse-FEM permite la precisa estimación de las propiedades del material. Además, estos resultados fueron validados con varias interacciones tejido-herramienta sobre el mismo espécimen.

  9. Percepción de seguridad, victimización y cultura ciudadana: sus relaciones en cinco contextos iberoamericanos

    Directory of Open Access Journals (Sweden)

    José Ignacio Ruiz

    2009-01-01

    Full Text Available El miedo al delito es uno de los temas sociales a los que debe dar respuesta la política criminal de los países, por sus posibles repercusiones en los ámbitos públicos de la salud, la economía y la interacción de los ciudadanos con el sistema de justicia. Niveles altos de miedo al delito pueden afectar la conducta social en el espacio público, alimentar los sistemas de vigilancia privada, las formas privadas de justicia y amenazar la democracia a favor de alternativas que prometen seguridad. El objetivo de este trabajo exploratorio y correlacional es mostrar los niveles de miedo al delito, victimización y cultura ciudadana en una muestra de estudiantes universitarios (n=572 de cinco países iberoamericanos: Argentina, Colombia, El Salvador, España y Perú. Se muestran los niveles de temor al delito y probabilidad percibida de victimización por países. También, se halló que una mayor cultura ciudadana se asocia principalmente con mayor satisfacción con la Policía, con mejor balance de clima emocional, menos temor al delito y, en menor grado, con menor victimización personal.

  10. 2006-2008 PAMAP LiDAR Data of Pennsylvania (Northern Counties)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset consists of classified LiDAR (Light Detection and Ranging) elevation points produced by the PAMAP Program. PAMAP data are organized into blocks, which...

  11. 2009 Federal Emergency Management Agency (FEMA) Topographic LiDAR: Fort Kent, Maine

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Camp Dresser McKee Inc. contracted with Sanborn Map Company to provide LiDAR mapping services for Fort Kent, Maine. Utilizing multi-return systems, Light Detection...

  12. Identification of four Drosophila allatostatins as the cognate ligands for the Drosophila orphan receptor DAR-2

    DEFF Research Database (Denmark)

    Lenz, C; Williamson, M; Hansen, G N

    2001-01-01

    The allatostatins are generally inhibitory insect neuropeptides. The Drosophila orphan receptor DAR-2 is a G-protein-coupled receptor, having 47% amino acid residue identity with another Drosophila receptor, DAR-1 (which is also called dros. GPCR, or DGR) that was previously shown...... to be the receptor for an intrinsic Drosophila A-type (cockroach-type) allatostatin. Here, we have permanently expressed DAR-2 in CHO cells and found that it is the cognate receptor for four Drosophila A-type allatostatins, the drostatins-A1 to -A4. Of all the drostatins, drostatin-A4 (Thr...... weakly in the brain. The Drosophila larval gut also contains about 20-30 endocrine cells, expressing the gene for the drostatins-A1 to -A4. We suggest, therefore, that DAR-2 mediates an allatostatin (drostatin)-induced inhibition of gut motility. This is the first report on the permanent and functional...

  13. Case of rhesus antigen weak D type 4.2. (DAR category detection

    Directory of Open Access Journals (Sweden)

    L. L. Golovkina

    2015-01-01

    Full Text Available Serological methods of Rhesus antigens identification in humans cannot identify D-antigen variants. In this article the serological characteristics of Rhesus antigen D weak type 4.2. (Category DAR are described.

  14. 2006 Florida LiDAR: Escambia, Santa Rosa, and Walton Counties

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — ESCAMBIA: The Light Detection and Ranging (LiDAR) LAS dataset is a survey of select areas within Escambia County, Florida. These data were produced for Dewberry and...

  15. I Pulmonary aspergilloma: A 15 years experience in Dar es Salaam ...

    African Journals Online (AJOL)

    College of Health Sciences,P 0 Box 65001, Dar es Salaam, Tanzania. Email address: ... esisting lung cavity by a fungus of the genus aspergillus forming ... is a national referral and teaching hospital with a ... Thus, preoperative evaluation and.

  16. LiDAR and DTM Data from Tapajos National Forest in Para, Brazil, 2008

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set provides LiDAR point clouds and digital terrain models (DTM) from surveys over the Tapajos National Forest in Belterra municipality, Para, Brazil...

  17. 2010 U.S. Geological Survey (USGS) Topographic LiDAR: San Francisco Bay, California

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The primary purpose of this project was to develop a consistent and accurate surface elevation dataset derived from high-accuracy Light Detection and Ranging (LiDAR)...

  18. CMS: LiDAR Data for Mangrove Forests in the Zambezi River Delta, Mozambique, 2014

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set provides high-resolution LiDAR point cloud data collected during surveys over mangrove forests in the Zambezi River Delta in Mozambique in May 2014....

  19. 2011 Federal Emergency Management Agency (FEMA) Topographic LiDAR: Quinnipiac River Watershed, Connecticut

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Quinnipiac AOI consists of one 443 square mile area. Ground Control is collected throughout the AOI for use in the processing of LiDAR data to ensure data...

  20. 2007 Lake County Board of County Commissioners Topographic LiDAR: Lake County, Florida

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This metadata document describes the LiDAR point data in LAS format produced by Kucera covering the project area of Lake County, FL. The data produced is...

  1. 2007 Southwest Florida Water Management District (SWFWMD) LiDAR: Hillsborough/Little Manatee Districts

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — EarthData International collected ADS-50 derived LiDAR over a portion of Hillsborough and Manatee Counties with a one meter post spacing. The period of collection...

  2. 2007 Southwest Florida Water Management District (SWFWMD) LiDAR: Hernando County

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset is one component of a digital terrain model (DTM) for the Southwest Florida Water Management Districts FY2006 Digital Orthophoto (B089) and LiDAR...

  3. 2006-2008 PAMAP LiDAR Data of Pennsylvania (Southern Counties)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset consists of classified LiDAR (Light Detection and Ranging) elevation points produced by the PAMAP Program. Additional information is available at the...

  4. LiDAR-derived Vegetation Canopy Structure, Great Smoky Mountains National Park, 2011

    Data.gov (United States)

    National Aeronautics and Space Administration — This dataset provides multiple-return LiDAR-derived vegetation canopy structure at 30-meter spatial resolution for the Great Smoky Mountains National Park (GSMNP)....

  5. Managing pre-eclampsia and eclampsia in Dar es Salaam public ...

    African Journals Online (AJOL)

    Managing pre-eclampsia and eclampsia in Dar es Salaam public health facilities: A focus on equipment, supplies, ... Tanzania Medical Journal ... A checklist was used to assess availability of equipment, supplies and drugs, and a structured ...

  6. 2009 National Renewable Energy Laboratory/Boston Redevelopment Authority Topographic LiDAR: Boston, Massachusetts

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Alliance for Sustainable Energy, LLC contracted with Sanborn to provide LiDAR mapping services for the Boston area. Utilizing multi-return systems, Light...

  7. 2010 U.S. Geological Survey Topographic LiDAR: Atchafalaya Basin, Louisiana

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Light Detection and Ranging (LiDAR) dataset is a survey of the Atchafalaya Basin in south-central Louisiana. The entire survey area encompasses 981 square miles....

  8. 2012 USACE Post Sandy Topographic LiDAR: Rhode Island and Massachusetts Coast

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This topographic elevation point data derived from multiple return light detection and ranging (LiDAR) represents 354.272 square miles of coastline for Rhode Island...

  9. 2008 Northwest Florida Water Management District (NWFWMD) LiDAR: Inland Okaloosa County

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This Light Detection and Ranging (LiDAR) LAS dataset is a survey of inland Okaloosa County, Florida not covered in the 2008 Florida Department of Emergency...

  10. LiDAR Relative Reflectivity Surface (2011) for the St. Thomas East End Reserve, St. Thomas

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution relative seafloor reflectivity surface for the St. Thomas East End Reserve...

  11. Surface characteristics modeling and performance evaluation of urban building materials using LiDAR data.

    Science.gov (United States)

    Li, Xiaolu; Liang, Yu

    2015-05-20

    Analysis of light detection and ranging (LiDAR) intensity data to extract surface features is of great interest in remote sensing research. One potential application of LiDAR intensity data is target classification. A new bidirectional reflectance distribution function (BRDF) model is derived for target characterization of rough and smooth surfaces. Based on the geometry of our coaxial full-waveform LiDAR system, the integration method is improved through coordinate transformation to establish the relationship between the BRDF model and intensity data of LiDAR. A series of experiments using typical urban building materials are implemented to validate the proposed BRDF model and integration method. The fitting results show that three parameters extracted from the proposed BRDF model can distinguish the urban building materials from perspectives of roughness, specular reflectance, and diffuse reflectance. A comprehensive analysis of these parameters will help characterize surface features in a physically rigorous manner.

  12. NETWORKS OF HEALTH CARE: A CHALLENGE TO SUS MANAGEMENT

    Directory of Open Access Journals (Sweden)

    Camila Dubow

    2013-09-01

    Full Text Available The article proposes a critical reflection, based on national law, scholarly, scientific, on the current development of Networks of Health Care, as a strategy for strengthening the Single Health System (SUS. Are weighted inefficiency of traditional ways of organizing care and management, the challenge of Network Health Care for comprehensive care and management mechanisms used in this process. The work provides subsidies for the care practices and health management are reflected, pointing strategies that result in disruptions of paradigms through a refocusing of attention in existing models. For networks of health care can be consolidated, is fundamental to political sensitivity of health managers with a commitment to build a new model of care, through the struggle to consolidate the SUS and the realization of the principles of universality, comprehensiveness and equity.

  13. Las comunidades y sus revistas científicas

    Directory of Open Access Journals (Sweden)

    Leonardo Romero

    2014-03-01

    Full Text Available Las investigaciones realizadas y expuestas ante las sociedades científicas, tuvieron en las revistas científicas un medio ex professode comunicación y diseminación de sus memorias y descubrimientos. Sin embargo en el escenario actual los investigadores y las revistas científicas adoptan nuevas características y se ven influenciadas por diferentes tendencias que requieren una estrategia de desarrollo editorial adecuada.

  14. Material test data of SUS304 welded joints

    Energy Technology Data Exchange (ETDEWEB)

    Asayama, Tai [Japan Nuclear Cycle Development Inst., Oarai, Ibaraki (Japan). Oarai Engineering Center; Kawakami, Tomohiro [Nuclear Energy System Incorporation, Tokyo (Japan)

    1999-10-01

    This report summarizes the material test data of SUS304 welded joints. Numbers of the data are as follows: Tensile tests 71 (Post-irradiation: 39, Others: 32), Creep tests 77 (Post-irradiation: 20, Others: 57), Fatigue tests 50 (Post-irradiation: 0), Creep-fatigue tests 14 (Post-irradiation: 0). This report consists of the printouts from 'the structural material data processing system'. (author)

  15. Helminth parasites of wild boar, Sus scrofa, in Iran.

    Science.gov (United States)

    Eslami, A; Farsad-Hamdi, S

    1992-04-01

    Fifty-seven wild boars (Sus scrofa) from protected regions of Iran were examined for helminths. Sixteen species of helminths were collected; there were ten nematodes, one acanthocephalan, two trematodes and three larval cestodes. New host and distribution records were established for all helminths except of Taenia solium cysticerci. Wild boar shared nine of these helminths with domestic pigs, six with ruminants and three with human beings in Iran. Metastrongylus pudendotectus and M. salmi are reported for the first time from Iran.

  16. Urban Classification Techniques Using the Fusion of LiDAR and Spectral Data

    Science.gov (United States)

    2012-09-01

    37 D. MASK CREATION .......................................................................................39 viii 1. LiDAR-based Masks...in Quick Terrain Modeler 2. WorldView-2 The image used in this project was collected by WorldView-2 on November 8, 2011 at Zulu time 19:34:42...OBSERVATIONS A. PROCESS OVERVIEW The focus of this thesis was to create a robust technique for fusing LiDAR and spectral imagery for creation of a

  17. Sexual behaviours and associated factors among students at Bahir Dar University: a cross sectional study

    OpenAIRE

    Mulu, Wondemagegn; Yimer, Mulat; Abera, Bayeh

    2014-01-01

    Background Sexual behaviour is the core of sexuality matters in adolescents and youths. Their modest or dynamic behaviour vulnerable them to risky sexual behaviours. In Ethiopia, there is scarcity of multicentered representative data on sexual behaviours in students to have a national picture at higher education. This study therefore conducted to assess sexual behaviours and associated factors at Bahir Dar University, Ethiopia. Methods A cross sectional study was conducted among Bahir Dar Uni...

  18. Synergy of VSWIR and LiDAR for Ecosystem Structure, Biomass, and Canopy Diversity

    Science.gov (United States)

    Cook, Bruce D.; Asner, Gregory P.

    2010-01-01

    This slide presentation reviews the use of Visible ShortWave InfraRed (VSWIR) Imaging Spectrometer and LiDAR to study ecosystem structure, biomass and canopy diversity. It is shown that the biophysical data from LiDAR and biochemical information from hyperspectral remote sensing provides complementary data for: (1) describing spatial patterns of vegetation and biodiversity, (2) characterizing relationships between ecosystem form and function, and (3) detecting natural and human induced change that affects the biogeochemical cycles.

  19. Modeling marbled murrelet (Brachyramphus marmoratus) habitat using LiDAR-derived canopy data

    Science.gov (United States)

    Hagar, Joan C.; Eskelson, Bianca N.I.; Haggerty, Patricia K.; Nelson, S. Kim; Vesely, David G.

    2014-01-01

    LiDAR (Light Detection And Ranging) is an emerging remote-sensing tool that can provide fine-scale data describing vertical complexity of vegetation relevant to species that are responsive to forest structure. We used LiDAR data to estimate occupancy probability for the federally threatened marbled murrelet (Brachyramphus marmoratus) in the Oregon Coast Range of the United States. Our goal was to address the need identified in the Recovery Plan for a more accurate estimate of the availability of nesting habitat by developing occupancy maps based on refined measures of nest-strand structure. We used murrelet occupancy data collected by the Bureau of Land Management Coos Bay District, and canopy metrics calculated from discrete return airborne LiDAR data, to fit a logistic regression model predicting the probability of occupancy. Our final model for stand-level occupancy included distance to coast, and 5 LiDAR-derived variables describing canopy structure. With an area under the curve value (AUC) of 0.74, this model had acceptable discrimination and fair agreement (Cohen's κ = 0.24), especially considering that all sites in our sample were regarded by managers as potential habitat. The LiDAR model provided better discrimination between occupied and unoccupied sites than did a model using variables derived from Gradient Nearest Neighbor maps that were previously reported as important predictors of murrelet occupancy (AUC = 0.64, κ = 0.12). We also evaluated LiDAR metrics at 11 known murrelet nest sites. Two LiDAR-derived variables accurately discriminated nest sites from random sites (average AUC = 0.91). LiDAR provided a means of quantifying 3-dimensional canopy structure with variables that are ecologically relevant to murrelet nesting habitat, and have not been as accurately quantified by other mensuration methods.

  20. ASTER GDEM validation using LiDAR data over coastal regions of Greenland

    DEFF Research Database (Denmark)

    Hvidegaard, Sine Munk; Sørensen, Louise Sandberg; Forsberg, René

    2011-01-01

    Elevation data from airborne Light Detection and Ranging (LiDAR) campaigns are used in an attempt to evaluate the accuracy of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) global digital elevation model (GDEM) in Greenland. The LiDAR elevation data set is characterized...... of Greenland and the effect of the number of scenes used to generate the ASTER GDEM as well as relief are associated with the GDEM accuracy....

  1. Getting the most neutrinos out of IsoDAR

    Energy Technology Data Exchange (ETDEWEB)

    Ciuffoli, Emilio; Zhao, Fengyi; Deliyergiyev, Maksym [CAS, Institute of Modern Physics, Lanzhou (China); Mohammed, Hosam; Evslin, Jarah [CAS, Institute of Modern Physics, Lanzhou (China); University of the Chinese Academy of Sciences, Beijing (China)

    2017-12-15

    Several experimental collaborations worldwide intend to test sterile neutrino models by measuring the disappearance of antineutrinos produced via isotope decay at rest (IsoDAR). The most advanced of these proposals have very similar setups, in which a proton beam strikes a target yielding neutrons which are absorbed by a high isotopic purity {sup 7}Li converter, yielding {sup 8}Li whose resulting decay yields the antineutrinos. In this note, we use FLUKA and GEANT4 simulations to investigate three proposed modifications of this standard proposal. In the first, the {sup 7}Li is replaced with {sup 7}Li compounds including a deuterium moderator. In the second, a gap is placed between the target and the converter to reduce the neutron bounce-back. Finally, we consider cooling the converter with liquid nitrogen. We find that these modifications can increase the antineutrino yield by as much as 50%. The first also substantially reduces the quantity of high purity {sup 7}Li which is needed. (orig.)

  2. (Women’s Readings of Parvaz- Dar- Hobab

    Directory of Open Access Journals (Sweden)

    Jamal Mohammadi

    2008-07-01

    Full Text Available This research is an attempt to explain how audiences read and decode the dominant or preferred reading of television soap operas ( here, one of them named : Parvaz Dar Hobab . The main problem of this research is that in what way TV soap operas prefer or make dominant some meanings, ideas and values and how audiences interpret and decode these meanings and ideas and values. From this viewpoint, a soap opera is an articulation constructed of different, and sometimes contrast, elements which are unified around a nodal point. In other words, a television soap opera is an articulatory discourse which is constructed through some technical, social and ideological codes by hegemonic system. In a TV soap opera, as a discourse, some ideas and meanings are preferred over the others. The question is that how social subjects, who have an objective position in the social structure, read and decode these dominant ideas and meanings? In this research, in the first part we have used the semilogical- structuralist method to explain the preferred reading of TV soap operas, and in the second part we used focused group interview to study women readings. To mention one of the conclusions of this research, we can say that this soap opera attempts to hide that social nihilism which is the main factor of addiction. Most of the audiences have an oppositional reading of this problem.

  3. Advances in animal ecology from 3D ecosystem mapping with LiDAR

    Science.gov (United States)

    Davies, A.; Asner, G. P.

    2015-12-01

    The advent and recent advances of Light Detection and Ranging (LiDAR) have enabled accurate measurement of 3D ecosystem structure. Although the use of LiDAR data is widespread in vegetation science, it has only recently (3D ecosystem structure for animals. We reviewed the studies to date that have used LiDAR in animal ecology, synthesising the insights gained. Structural heterogeneity is most conducive to increased animal richness and abundance, and increased complexity of vertical vegetation structure is more positively influential than traditionally measured canopy cover, which produces mixed results. However, different taxonomic groups interact with a variety of 3D canopy traits and some groups with 3D topography. LiDAR technology can be applied to animal ecology studies in a wide variety of environments to answer an impressive array of questions. Drawing on case studies from vastly different groups, termites and lions, we further demonstrate the applicability of LiDAR and highlight new understanding, ranging from habitat preference to predator-prey interactions, that would not have been possible from studies restricted to field based methods. We conclude with discussion of how future studies will benefit by using LiDAR to consider 3D habitat effects in a wider variety of ecosystems and with more taxa to develop a better understanding of animal dynamics.

  4. The application of LiDAR to investigate foredune morphology and vegetation

    Science.gov (United States)

    Doyle, Thomas B.; Woodroffe, Colin D.

    2018-02-01

    LiDAR (Light Detection and Ranging) has been used to investigate coastal landform morphology, evolution, and change for almost a decade. Repeated airborne LiDAR surveys can provide the scientific community with significant observations of how shorelines have evolved, which may then enable forecasts of future patterns of change. However, there have been few studies that have considered the application of this new technology to the specific study of foredune morphology and vegetation. The accuracy and appropriateness of airborne LiDAR needs to be assessed, particularly where the density of vegetation may obscure the underlying topography, prior to interpreting derived geomorphic features. This study: i) tests the vertical accuracy of airborne LiDAR in 37 foredune systems along the coast of south-eastern Australia, and ii) demonstrates that it can be used to describe foredune morphology and vegetation in considerable detail. There was a strong correlation between the remotely-sensed LiDAR-derived elevation and field topographic and vegetation surveys (R2 = 0.96). A protocol for obtaining foredune geomorphic and botanical parameters is described. It enables widespread biogeomorphic characterisation along coasts for which LiDAR data is available, which can benefit both coastal managers and researchers alike.

  5. An Easy-to-Use Airborne LiDAR Data Filtering Method Based on Cloth Simulation

    Directory of Open Access Journals (Sweden)

    Wuming Zhang

    2016-06-01

    Full Text Available Separating point clouds into ground and non-ground measurements is an essential step to generate digital terrain models (DTMs from airborne LiDAR (light detection and ranging data. However, most filtering algorithms need to carefully set up a number of complicated parameters to achieve high accuracy. In this paper, we present a new filtering method which only needs a few easy-to-set integer and Boolean parameters. Within the proposed approach, a LiDAR point cloud is inverted, and then a rigid cloth is used to cover the inverted surface. By analyzing the interactions between the cloth nodes and the corresponding LiDAR points, the locations of the cloth nodes can be determined to generate an approximation of the ground surface. Finally, the ground points can be extracted from the LiDAR point cloud by comparing the original LiDAR points and the generated surface. Benchmark datasets provided by ISPRS (International Society for Photogrammetry and Remote Sensing working Group III/3 are used to validate the proposed filtering method, and the experimental results yield an average total error of 4.58%, which is comparable with most of the state-of-the-art filtering algorithms. The proposed easy-to-use filtering method may help the users without much experience to use LiDAR data and related technology in their own applications more easily.

  6. A visão ecológica: uma teia na enfermagem La visión ecologica: un tejido en enfermería Ecologic view: a web in the nursing

    Directory of Open Access Journals (Sweden)

    Estela Maria Leite Meirelles Monteiro

    2005-06-01

    Full Text Available A partir de mudanças revolucionárias em conceitos de realidade ocasionadas pela física e pensamento modernos, nova e consistente visão do mundo surge, influenciada pela transição da física clássica para quântica. É propósito do estudo mostrar o pensamento de Capra favorecendo a disseminação do cuidado ecológico na enfermagem. O novo paradigma pode ser chamado de uma visão ecológica, a partir do entendimento de ecologia num sentido amplo e profundo. A saúde na visão holística e na teia de relações que compreende o pensamento ecológico exige do enfermeiro, em suas áreas de atividades uma percepção crítica concernente ao saber, saber-ser e saber-fazer, comprometido com transformações que afloraram das emoções, do encantamento, dos sentimentos, do cuidar da natureza como premissa para qualidade e existência da humanidade.A partir de los cambios revolucionarios en conceptos de realidad impulsados por la física y el pensamiento moderno, nueva y consistente visión del mundo surge, influenciada por la transición de la física clásica hacia quántica. El estudio se propone mostrar el pensamiento de Capra influenciado la diseminación del cuidado ecológico en enfermería. El nuevo paradigma puede ser llamado una visión ecológica, partiendo de la comprensión de la ecología en un sentido amplio y profundo. La salud, la visión holística del hombre y del tejido de relaciones que abarca el pensamiento ecológico, exige del enfermero en sus áreas de actividad, una percepción crítica en relación al saber, saber ser y saber hacer comprometidos con transformaciones, el afloramiento de las emociones, del encantamiento, de los sentimientos, del cuidado de la naturaleza como premisa para la calidad y existencia de la humanidad.From the revolutionary changes in reality concept, caused by physics and modern thoughts, new consistent vision of the world emerge and it is influenced from the classic physics to quantum physics

  7. Palabras y gestos de compromiso: los reyes castellanos y sus juramentos (siglo XV

    Directory of Open Access Journals (Sweden)

    Ana Isabel CARRASCO MANCHADO

    2007-06-01

    Full Text Available Parmi les paroles prononcées par les rois au cours de leur règne, il y a celles qui expriment l’engagement : serment, promesses, vœux et hommages… Ces engagements verbaux, en tant qu’actes de paroles, se chargent d’une importante signification politique lorsqu’un roi en est l’émetteur. En raison des conditions dans lesquelles elles sont prononcées, dans un contexte public et toujours politique, et de leur efficacité rituelle, ces paroles constituent un champ privilégié pour étudier les fonctions de la parole royale. Le présent article se veut être une première approche des « paroles d’engagement » prononcées par les rois castillans au cours du XVe siècle à partir de leur mention dans les chroniques, de leur rôle dans la construction d’une image royale, des contextes qui donnent lieu à l’expression de ce type de parole royale (serments institutionnels, promesses liées à la lutte politique…, du sens de la gamme linguistique sur laquelle joue un roi pour exprimer son engagement et de la place de cette dernière dans la construction de l’autorité royale.Entre las palabras pronunciadas por los reyes a lo largo de su reinado se encuentran las que expresan compromiso: juramentos, promesas, votos, homenajes… Estos compromisos verbales, como actos de habla, se hallan plagados de sentido político cuando es el rey el emisor. Por sus condiciones de su pronunciación, en un contexto público y siempre político y por su eficacia ritual suponen un ámbito privilegiado para el estudio de las funciones del habla regia. El objetivo de este artículo es realizar una aproximación a las “palabras de compromiso” expresadas por los reyes castellanos en el siglo XV, tratando de valorar su presencia en el discurso cronístico; su relación con la construcción de la imagen del monarca; los contextos que suelen dar lugar a expresiones de este tipo de palabra regia (juramentos institucionales; promesas ligadas a la

  8. Lesiones naturales y regeneración de tejido en ramets del coral Montastraea annularis (Scleractinia: Faviidae en un arrecife degradado del Caribe Colombiano

    Directory of Open Access Journals (Sweden)

    Elvira Alvarado Ch

    2009-12-01

    Full Text Available Las poblaciones de Montastraea annularis muestran síntomas de declinamiento y sin embargo, pocos estudios se han realizado sobre tipos, frecuencias e intensidad de lesiones naturales in situ. Durante un año, septiembre 2003 a septiembre 2004, se hizo el seguimiento anual de lesiones naturales que aparecieron en ramets sanos de una población en un arrecife degradado dentro de un Área Marina Protegida, para inferir su efecto en la estructura de talla de la población. El 94% de los ramets presentaron lesiones causadas por blanqueamiento, depredación e interacciones con algas, esponjas y bioerodadores. La depredación causó el 47% y la interacción con algas el 36%. El 85% de las lesiones eran de tallas pequeñas (60% de su tejido vivo en los meses de septiembre a noviembre, pero la recuperación fue del 100% a los tres meses. Por el contrario, las lesiones con algas (36%, mostraron menor recuperación (6.7% y una tendencia a aumentar el área de lesión con el tiempo. En general, el porcentaje de área de tejido afectada por lesiones en un ramet durante cualquier mes fue menor a 10%. Sin embargo, de mayo a septiembre el porcentaje de tejido afectado fue mayor (10-50% debido al incremento en la frecuencia y abundancia de depredación, blanqueamiento e interacción con algas, y a la menor tasa de recuperación. Al final de un año, las lesiones que no se recuperaron causaron mortalidad parcial en el 25% de los ramets. El efecto de las lesiones y la recuperación sobre el tamaño de los ramets evidenció disminución de talla a lo largo del año, y al final de este, significó que el 21% pasara a una clase de talla menor.Natural lesions and regeneration of ramets of Montastraea annularis (Scleractinia: Faviidae in a degraded reef of the Colombian Caribbean. Currently, Montastraea annularis populations are suffering from high partial mortality rates; yet few studies have determined type, frequency and intensity of natural lesions in situ. During

  9. ¿Planifican los tutores la formación de sus residentes?: Investigación realizada en la especialidad de Medicina Familiar y Comunitaria

    Directory of Open Access Journals (Sweden)

    Eduardo Romero-Sánchez

    Full Text Available Introducción. ¿Planifican los tutores la formación de sus residentes? Si es así, ¿cómo lo hacen?, ¿existen diferencias entre lo explicitado en los programas formativos de las distintas especialidades y lo que ocurre realmente en la práctica diaria?, ¿están formados los tutores para planificar su docencia desde el punto de vista pedagógico? Sujetos y métodos. Para dar respuesta a estos interrogantes se ha llevado a cabo un estudio exploratorio de corte descriptivo. En él se ha diseñado, validado y presentado un cuestionario que recoge la opinión contrastada tanto de tutores como de sus respectivos residentes. La población la componen el total de los médicos residentes R1 (promoción 2006-2010; n = 57 y R3 (promoción 2004-2007; n = 58 de Medicina Familiar y Comunitaria de la Región de Murcia, y el total de la población de sus respectivos tutores: tutores de R1 (n = 57 y tutores de R3 (n = 58. Han participado 26 centros de salud que gestionan las tres unidades docentes de la región. Los datos se han analizado mediante el programa SPSS v. 14.0. Resultados y conclusiones. Aunque en la actividad docente de los tutores está muy presente la espontaneidad y la improvisación, existen importantes elementos de programación que hay que saber extraer e identificar porque son propios de un contexto práctico de formación. Se reconoce una mayor satisfacción de los implicados cuando el proceso formativo está más planificado.

  10. Negociar en red: familia, amistad y paisanaje. El virrey Superunda y sus agentes en Lima y Cádiz (1745-1761

    Directory of Open Access Journals (Sweden)

    Latasa, Pilar

    2003-12-01

    Full Text Available In order to reassess the Peruvian government of Viceroy conde de Superunda, this article represents a first approach to his private client networks. Staking out his connections in Royal Madrid’s Court, discussion focuses on describing the relations of kinship and nationhood which unite him with his family members and closest servants in the Viceroyal Court of Lima. The former depicts an overall picture of the kind of relationship he maintained with his agents in economic issues during his stay in the viceroyalty. Through this analysis a wide framework uniting distant places such as Lima and Cádiz, Madrid and La Rioja —connections maintained ever after Superunda’s return to Spain—is outlined.

    Este artículo pretende dar una nueva perspectiva del gobierno peruano del virrey conde de Superunda, a través de un primer acercamiento a su red clientelar privada. Se trazan, en primer lugar, sus conexiones en la corte madrileña, para llegar después a las relaciones de parentesco y paisanaje que le unen con sus familiares y criados más cercanos en la corte virreinal limeña. Todo ello conduce a vislumbrar qué tipo de vínculos mantuvo con quienes fueron sus agentes en cuestiones económicas durante su estancia en el virreinato; a través de los cuales envió importantes sumas de dinero a la península, como se demuestra por la documentación. Este análisis permite descubrir un amplio entramado que unió lugares tan distantes como Lima, Cádiz, Madrid y La Rioja y se mantuvo incluso tras el regreso de Superunda a España.

  11. Regeneración in vitro de brotes de Polianthes tuberosa L. a partir de yemas vegetativas de la inflorescencia y de tejido de cormo

    Directory of Open Access Journals (Sweden)

    Fanny Hernández-Mendoza

    2014-01-01

    Full Text Available Polianthes tuberosa L. es una planta endémica de México, comercialmente se cultiva para flor de corte, y, además, es utilizada en la industria farmacéutica y del perfume. Tradicionalmente, los productores la propagan utilizando los cormos, lo que ha ocasionado que el cultivo presente poca variabilidad genética y posiblemente, por esta razón solo se conocen cultivares con flores blancas. Con base en lo anterior el objetivo de la presente investigación consistió en establecer la metodología práctica y competitiva para propagar in vitro Polianthes tuberosa L. Las yemas y pequeños segmentos de tejido de cormo fueron colocadas sobre la superficie del medio de cultivo, base GC (comunicación personal Guillermo Carrillo con las sales inorgánicas del medio de cultivo Murashige y Skoog (1962 por litro, 50 mL de agua de coco, 20 g de sacarosa, 6.4 g de agar y el pH fue ajustado a 5.7. Con este medio básico se prepararon medios de cultivo que contenían bencilaminopurina (BAP, ácido naftalenacético (ANA, ácido 2,4-diclorofenoxiacético (2,4-D, ácido indolacético (AIA, y cinetina. La formación de brotes que dieron origen a las plántulas ocurrió mediante, la regeneración directa de la yema floral la cual al crecer forma sólo una plántula y a partir del tejido de la base de la yema, de esta región se obtuvieron hasta seis brotes por yema en el medio que contiene BAP, 4.5 mg y ANA, 0.1 mg, del cual la regeneración de brotes fue mayor (56.1 %. En el caso de cormo el problema fue la contaminación llegando en algunos casos hasta el 100 % de los cultivos. Es de resaltar la importancia de poder lograr la regeneración masiva in vitro de plantas de nardo a partir de yemas florales.

  12. NASA Fluid Lensing & MiDAR: Next-Generation Remote Sensing Technologies for Aquatic Remote Sensing

    Science.gov (United States)

    Chirayath, Ved

    2018-01-01

    We present two recent instrument technology developments at NASA, Fluid Lensing and MiDAR, and their application to remote sensing of Earth's aquatic systems. Fluid Lensing is the first remote sensing technology capable of imaging through ocean waves in 3D at sub-cm resolutions. MiDAR is a next-generation active hyperspectral remote sensing and optical communications instrument capable of active fluid lensing. Fluid Lensing has been used to provide 3D multispectral imagery of shallow marine systems from unmanned aerial vehicles (UAVs, or drones), including coral reefs in American Samoa and stromatolite reefs in Hamelin Pool, Western Australia. MiDAR is being deployed on aircraft and underwater remotely operated vehicles (ROVs) to enable a new method for remote sensing of living and nonliving structures in extreme environments. MiDAR images targets with high-intensity narrowband structured optical radiation to measure an objectâ€"TM"s non-linear spectral reflectance, image through fluid interfaces such as ocean waves with active fluid lensing, and simultaneously transmit high-bandwidth data. As an active instrument, MiDAR is capable of remotely sensing reflectance at the centimeter (cm) spatial scale with a signal-to-noise ratio (SNR) multiple orders of magnitude higher than passive airborne and spaceborne remote sensing systems with significantly reduced integration time. This allows for rapid video-frame-rate hyperspectral sensing into the far ultraviolet and VNIR wavelengths. Previously, MiDAR was developed into a TRL 2 laboratory instrument capable of imaging in thirty-two narrowband channels across the VNIR spectrum (400-950nm). Recently, MiDAR UV was raised to TRL4 and expanded to include five ultraviolet bands from 280-400nm, permitting UV remote sensing capabilities in UV A, B, and C bands and enabling mineral identification and stimulated fluorescence measurements of organic proteins and compounds, such as green fluorescent proteins in terrestrial and

  13. Independent evaluation of the SNODAS snow depth product using regional scale LiDAR-derived measurements

    Science.gov (United States)

    Hedrick, A.; Marshall, H.-P.; Winstral, A.; Elder, K.; Yueh, S.; Cline, D.

    2014-06-01

    Repeated Light Detection and Ranging (LiDAR) surveys are quickly becoming the de facto method for measuring spatial variability of montane snowpacks at high resolution. This study examines the potential of a 750 km2 LiDAR-derived dataset of snow depths, collected during the 2007 northern Colorado Cold Lands Processes Experiment (CLPX-2), as a validation source for an operational hydrologic snow model. The SNOw Data Assimilation System (SNODAS) model framework, operated by the US National Weather Service, combines a physically-based energy-and-mass-balance snow model with satellite, airborne and automated ground-based observations to provide daily estimates of snowpack properties at nominally 1 km resolution over the coterminous United States. Independent validation data is scarce due to the assimilating nature of SNODAS, compelling the need for an independent validation dataset with substantial geographic coverage. Within twelve distinctive 500 m × 500 m study areas located throughout the survey swath, ground crews performed approximately 600 manual snow depth measurements during each of the CLPX-2 LiDAR acquisitions. This supplied a dataset for constraining the uncertainty of upscaled LiDAR estimates of snow depth at the 1 km SNODAS resolution, resulting in a root-mean-square difference of 13 cm. Upscaled LiDAR snow depths were then compared to the SNODAS-estimates over the entire study area for the dates of the LiDAR flights. The remotely-sensed snow depths provided a more spatially continuous comparison dataset and agreed more closely to the model estimates than that of the in situ measurements alone. Finally, the results revealed three distinct areas where the differences between LiDAR observations and SNODAS estimates were most drastic, suggesting natural processes specific to these regions as causal influences on model uncertainty.

  14. Parallel Landscape Driven Data Reduction & Spatial Interpolation Algorithm for Big LiDAR Data

    Directory of Open Access Journals (Sweden)

    Rahil Sharma

    2016-06-01

    Full Text Available Airborne Light Detection and Ranging (LiDAR topographic data provide highly accurate digital terrain information, which is used widely in applications like creating flood insurance rate maps, forest and tree studies, coastal change mapping, soil and landscape classification, 3D urban modeling, river bank management, agricultural crop studies, etc. In this paper, we focus mainly on the use of LiDAR data in terrain modeling/Digital Elevation Model (DEM generation. Technological advancements in building LiDAR sensors have enabled highly accurate and highly dense LiDAR point clouds, which have made possible high resolution modeling of terrain surfaces. However, high density data result in massive data volumes, which pose computing issues. Computational time required for dissemination, processing and storage of these data is directly proportional to the volume of the data. We describe a novel technique based on the slope map of the terrain, which addresses the challenging problem in the area of spatial data analysis, of reducing this dense LiDAR data without sacrificing its accuracy. To the best of our knowledge, this is the first ever landscape-driven data reduction algorithm. We also perform an empirical study, which shows that there is no significant loss in accuracy for the DEM generated from a 52% reduced LiDAR dataset generated by our algorithm, compared to the DEM generated from an original, complete LiDAR dataset. For the accuracy of our statistical analysis, we perform Root Mean Square Error (RMSE comparing all of the grid points of the original DEM to the DEM generated by reduced data, instead of comparing a few random control points. Besides, our multi-core data reduction algorithm is highly scalable. We also describe a modified parallel Inverse Distance Weighted (IDW spatial interpolation method and show that the DEMs it generates are time-efficient and have better accuracy than the one’s generated by the traditional IDW method.

  15. Optimizing variable radius plot size and LiDAR resolution to model standing volume in conifer forests

    Science.gov (United States)

    Ram Kumar Deo; Robert E. Froese; Michael J. Falkowski; Andrew T. Hudak

    2016-01-01

    The conventional approach to LiDAR-based forest inventory modeling depends on field sample data from fixed-radius plots (FRP). Because FRP sampling is cost intensive, combining variable-radius plot (VRP) sampling and LiDAR data has the potential to improve inventory efficiency. The overarching goal of this study was to evaluate the integration of LiDAR and VRP data....

  16. Cognitive testing of pigs (Sus scrofa) in translational biobehavioral research

    DEFF Research Database (Denmark)

    Kornum, Birgitte R; Knudsen, Gitte M

    2011-01-01

    Within neuroscience and biobehavioral research, the pig (Sus scrofus) is increasingly being acknowledged as a valuable large animal species. Compared to the rodent brain, the pig brain more closely resembles the human brain in terms of both anatomy and biochemistry, which associates the pig...... of farm animal welfare researchers, but it has only recently received interest in the wider neuroscience community. Several behavioral tasks have successfully been adapted to the pig, and valuable results have been produced. However, most tasks have only been established at a single research facility...

  17. La memoria de Vejer en sus primeras tarjetas postales

    OpenAIRE

    Gámiz-Gordo, Antonio

    2013-01-01

    Se acaba de imprimir este libro sobre imágenes del pasado del gaditano pueblo de Vejer de la Frontera, donde el profesor Gámiz reúne un novedoso plano de la ciudad de 1907 y 40 tarjetas postales fechadas entre 1904 y 1930 (muchas de ellas con puntos de toma localizables en el plano citado, al ser callejero de la época), además de comentarios y reflexiones que el autor realiza sobre las imágenes gráficas, contexto e historia. Así, se abordan temas como memoria e imagen, sus relaciones e int...

  18. Migrantes culiacanenses en California: Diversidad en sus redes migratorias

    OpenAIRE

    Sánchez Sánchez, Ernesto

    2012-01-01

    Es un hecho la dinámica extraordinaria que tienen los lugares de reciente migración, ya sea como lugares de origen o destino. El estado de Sinaloa se suma a esta dinámica en la cual aparecen ahora sus tres principales zonas urbanas -Culiacán, Mazatlán y Ahome- dentro de su mapa migratorio. Sin embargo la migración, como proceso social, implica una serie de interrelaciones formadas tiempo atrás. Éstas repercuten en la conformación de las nuevas redes migratorias. No obstante, durante décadas, ...

  19. Kant, sus maestros y los maestros de la humanidad

    OpenAIRE

    Ríos Acevedo, Clara Inés

    1999-01-01

    A instancias de Newton y Rousseau, con sus planteamientos sobre la gravitación universal y la rivindicación del sentimiento y la moralidad, respectivameente, Kant se ocupó de la insociable sociabilidad del ser humano, que genera la dialéctica de la guerra y la paz, antítesis de la ley moral y premisa de todo sistema social; del problema de la paz mundial, promulgando la necesidad de un organismo legal internacional que agrupara todos los Estados del planeta, para así disminuir las guerras y p...

  20. Las familias homoparentales y sus redes de apoyo social

    OpenAIRE

    González Rodríguez, María del Mar; Sánchez, M. Ángeles

    2003-01-01

    Este trabajo tiene como objetivo avanzar en conocimiento con respecto a las familias homoparentales, estudiando sus redes de apoyo social, aspecto crucial en cualquier contexto familiar. Se estudiaron 28 familias homoparentales con hijos o hijas entre los 3 y los 16 años. De ellas, 15 provenían de la Comunidad Andaluza y 13 de la Comunidad de Madrid. Los resultados indican que estas familias disponen de una red amplia de figuras de apoyo, que incluye tanto a familiares como a amistades, así c...

  1. Padres hombres custodios - PHC: la paternidad, sus alcances y motivaciones

    OpenAIRE

    Fierro Barahona, José Gustavo; Ruíz Gómez, Marina Stella

    2015-01-01

    Esta investigación comprendió las concepciones sobre paternidad presentes en los padres hombres al solicitar la custodia de sus hijas e hijos menores de siete años ante el ICBF de la ciudad de Cali con un diseño cualitativo de aproximación fenomenológica, se utilizó el instrumento de entrevista en profundidad con cinco padres hombres custodios - PHC. Los resultados se presentaron en relación a las distinciones expresadas por los PHC acerca de las razones que los llevó a solicit...

  2. Virus Zika en Centroamérica y sus complicaciones

    OpenAIRE

    Núñez, Eduardo; Vásquez, Marilin; Beltrán-Luque, Briana; Padgett, Denis

    2016-01-01

    El virus Zika (ZIKV) es un arbovirus, aislado por primera vez en Zika Uganda, reportándose el primer caso en humanos en 1954, desde entonces se han descrito casos en África, Asia, Oceanía y en América. Centroamérica ha sido afectada, por cambios climáticos, pobreza y mal saneamiento ambiental. Su transmisión es vectorial y puede tener transmisión perinatal, transfusiones sanguíneas o por semen infectado. Clínicamente se diferencian poco de Dengue y Chikungunya. Sus complicaciones son principa...

  3. Entusiastas, aficionados y espectadores: sus valores, motivaciones y compromiso

    OpenAIRE

    Miquel Torregrosa; Jaume Cruz

    2009-01-01

    El interés de las ciencias aplicadas al deporte en los espectadores y el espectáculo deportivo ha sido más bien escaso y en muchos casos sobrecentrado en la violencia. El objetivo de este trabajo es proponer una clasificación alternativa de los aficionados al fútbol a partir del tipo de contacto que tienen con el espectáculo y describir sus valores, motivaciones y compromiso. Mil setecientas diecinueve personas asistentes a partidos de fútbol organizados por la Liga de Fútbol Profesional con...

  4. Geotechnical applications of LiDAR pertaining to geomechanical evaluation and hazard identification

    Science.gov (United States)

    Lato, Matthew J.

    Natural hazards related to ground movement that directly affect the safety of motorists and highway infrastructure include, but are not limited to, rockfalls, rockslides, debris flows, and landslides. This thesis specifically deals with the evaluation of rockfall hazards through the evaluation of LiDAR data. Light Detection And Ranging (LiDAR) is an imaging technology that can be used to delineate and evaluate geomechanically-controlled hazards. LiDAR has been adopted to conduct hazard evaluations pertaining to rockfall, rock-avalanches, debris flows, and landslides. Characteristics of LiDAR surveying, such as rapid data acquisition rates, mobile data collection, and high data densities, pose problems to traditional CAD or GIS-based mapping methods. New analyses methods, including tools specifically oriented to geomechanical analyses, are needed. The research completed in this thesis supports development of new methods, including improved survey techniques, innovative software workflows, and processing algorithms to aid in the detection and evaluation of geomechanically controlled rockfall hazards. The scientific research conducted between the years of 2006-2010, as presented in this thesis, are divided into five chapters, each of which has been published by or is under review by an international journal. The five research foci are: (i) geomechanical feature extraction and analysis using LiDAR data in active mining environments; (ii) engineered monitoring of rockfall hazards along transportation corridors: using mobile terrestrial LiDAR; (iii) optimization of LiDAR scanning and processing for automated structural evaluation of discontinuities in rockmasses; (iv) location orientation bias when using static LiDAR data for geomechanical analysis; and (v) evaluating roadside rockmasses for rockfall hazards from LiDAR data: optimizing data collection and processing protocols. The research conducted pertaining to this thesis has direct and significant implications with

  5. ¿Hay un rol para los agentes biológicos en el tratamiento de la patología pulmonar intersticial asociada a enfermedades del tejido conectivo?

    OpenAIRE

    Quadrelli, Silvia; Dubinsky, Diana; Alvarez, Sabrina

    2016-01-01

    Excepto en la esclerodermia, no hay ensayos clínicos controlados válidos para guiar la decisión de tratamiento en enfermedad pulmonar intersticial asociada a enfermedades del tejido conectivo (EPID-ETC). Los únicos dos estudios randomizados, controlados, publicados en pacientes con esclerodermia, mostraron un beneficio modesto pero significativo del uso de ciclofosfamida, y la transformaron en el esquema más convencional de tratamiento de toda la EPID-ETC. Los tratamientos iniciales aceptados...

  6. Entusiastas, aficionados y espectadores: sus valores, motivaciones y compromiso

    Directory of Open Access Journals (Sweden)

    Miquel Torregrosa

    2009-01-01

    Full Text Available El interés de las ciencias aplicadas al deporte en los espectadores y el espectáculo deportivo ha sido más bien escaso y en muchos casos sobrecentrado en la violencia. El objetivo de este trabajo es proponer una clasificación alternativa de los aficionados al fútbol a partir del tipo de contacto que tienen con el espectáculo y describir sus valores, motivaciones y compromiso. Mil setecientas diecinueve personas asistentes a partidos de fútbol organizados por la Liga de Fútbol Profesional contestaron cuestionarios sobre sus valores, motivaciones y relación con el fútbol. Los resultados muestranque los entusiastas son los aficionados más motivados y comprometidos con el fútbol al mismo tiempo que participan significativamente más de valores relacionados con el conservadurismo y la autopromoción que las otras tres categorías (espectadores, aficionados presenciales y aficionados virtuales. La clasificaciónpropuesta en base al tipo de contacto con el fútbol permite conceptualizar el fútbol como algo más que lo que ocurre en los estadios y abre las puertas a intervencionesdesde lo positivo para promover el fair play y la deportividad en los aficionados.

  7. Toxicity of herbal medicines with interest to SUS: a review

    Directory of Open Access Journals (Sweden)

    Ciciane Pereira Marten Fernandes

    2016-11-01

    Full Text Available Abstract: In Brazil, ever since colonization plants have been used as natural products; thus, the National Health Surveillance Agency has been establishing rules for herbal medicine regulation; in this light, 71 plant species were chosen and empirically used in the country to investigate their medicinal properties. Currently, 12 of these 71 plants have been approved to be used in SUS (Public Health System, the remaining species still need further research. Thusly, this review aimed to seek information from toxicological studies on the plants that have not yet been officially approved, to stimulate new research in the field, promoting an economical and functional impact. In order to obtain the information, the keywords plant name + toxicity and/or toxicological studies were searched in the most prominent databases, both in English and in Portuguese. The ten plants with the most references were included in this review. Among the ten plants assessed, three have all the required studies required by the National Health Surveillance Agency, two of which we recommend the immediate adoption by SUS. In general, three plants have a determined LD50, nine have reproductive toxicity data, and five have not yet shown any sign of toxicity.

  8. Development of LiDAR measurements for the German offshore test site

    International Nuclear Information System (INIS)

    Rettenmeier, A; Kuehn, M; Waechter, M; Rahm, S; Mellinghoff, H; Siegmeier, B; Reeder, L

    2008-01-01

    The paper introduces the content of the recently started joint research project 'Development of LiDAR measurements for the German Offshore Test Site' which has the objective to support other research projects at the German offshore test site 'alpha ventus'. The project has started before the erection of the offshore wind farm and one aim is to give recommendations concerning LiDAR technology useable for offshore measurement campaigns and data analysis. The work is organized in four work packages. The work package LiDAR technology deals with the specification, acquisition and calibration of a commercial LiDAR system for the measurement campaigns. Power curve measurements are dedicated to power curve assessment with ground-based LiDAR using standard statistical methods. Additionally, it deals with the development of new methods for the measurement of non-steady short-term power curves. Wind field research aims at the development of wake loading simulation methods of wind turbines and the exploration of loading control strategies and nacelle-based wind field measurement techniques. Finally, dissemination of results to the industry takes place in work package Technology transfer

  9. In-Field High-Throughput Phenotyping of Cotton Plant Height Using LiDAR

    Directory of Open Access Journals (Sweden)

    Shangpeng Sun

    2017-04-01

    Full Text Available A LiDAR-based high-throughput phenotyping (HTP system was developed for cotton plant phenotyping in the field. The HTP system consists of a 2D LiDAR and an RTK-GPS mounted on a high clearance tractor. The LiDAR scanned three rows of cotton plots simultaneously from the top and the RTK-GPS was used to provide the spatial coordinates of the point cloud during data collection. Configuration parameters of the system were optimized to ensure the best data quality. A height profile for each plot was extracted from the dense three dimensional point clouds; then the maximum height and height distribution of each plot were derived. In lab tests, single plants were scanned by LiDAR using 0.5° angular resolution and results showed an R2 value of 1.00 (RMSE = 3.46 mm in comparison to manual measurements. In field tests using the same angular resolution; the LiDAR-based HTP system achieved average R2 values of 0.98 (RMSE = 65 mm for cotton plot height estimation; compared to manual measurements. This HTP system is particularly useful for large field application because it provides highly accurate measurements; and the efficiency is greatly improved compared to similar studies using the side view scan.

  10. Development and mapping of DArT markers within the Festuca - Lolium complex

    Science.gov (United States)

    Kopecký, David; Bartoš, Jan; Lukaszewski, Adam J; Baird, James H; Černoch, Vladimír; Kölliker, Roland; Rognli, Odd Arne; Blois, Helene; Caig, Vanessa; Lübberstedt, Thomas; Studer, Bruno; Shaw, Paul; Doležel, Jaroslav; Kilian, Andrzej

    2009-01-01

    Background Grasses are among the most important and widely cultivated plants on Earth. They provide high quality fodder for livestock, are used for turf and amenity purposes, and play a fundamental role in environment protection. Among cultivated grasses, species within the Festuca-Lolium complex predominate, especially in temperate regions. To facilitate high-throughput genome profiling and genetic mapping within the complex, we have developed a Diversity Arrays Technology (DArT) array for five grass species: F. pratensis, F. arundinacea, F. glaucescens, L. perenne and L. multiflorum. Results The DArTFest array contains 7680 probes derived from methyl-filtered genomic representations. In a first marker discovery experiment performed on 40 genotypes from each species (with the exception of F. glaucescens for which only 7 genotypes were used), we identified 3884 polymorphic markers. The number of DArT markers identified in every single genotype varied from 821 to 1852. To test the usefulness of DArTFest array for physical mapping, DArT markers were assigned to each of the seven chromosomes of F. pratensis using single chromosome substitution lines while recombinants of F. pratensis chromosome 3 were used to allocate the markers to seven chromosome bins. Conclusion The resources developed in this project will facilitate the development of genetic maps in Festuca and Lolium, the analysis on genetic diversity, and the monitoring of the genomic constitution of the Festuca × Lolium hybrids. They will also enable marker-assisted selection for multiple traits or for specific genome regions. PMID:19832973

  11. Specular and diffuse object extraction from a LiDAR derived Digital Surface Model (DSM)

    International Nuclear Information System (INIS)

    Saraf, N M; Hamid, J R A; Kamaruddin, M H

    2014-01-01

    This paper intents to investigate the indifferent behaviour quantitatively of target objects of interest due to specular and diffuse reflectivity based on generated LiDAR DSM of the study site in Ampang, Kuala Lumpur. The LiDAR data to be used was initially checked for its reliability and accuracy. The point cloud LiDAR data was converted to raster to allow grid analysis of the next process of generating the DSM and DTM. Filtering and masking were made removing the features of interest (i.e. building and tree) and other unwanted above surface features. A normalised DSM and object segmentation approach were conducted on the trees and buildings separately. Error assessment and findings attained were highlighted and documented. The result of LiDAR verification certified that the data is reliable and useable. The RMSE obtained is within the tolerance value of horizontal and vertical accuracy (x, y, z) i.e. 0.159 m, 0.211 m 0.091 m respectively. Building extraction inclusive of roof top based on slope and contour analysis undertaken indicate the capability of the approach while single tree extraction through aspect analysis appears to preserve the accuracy of the extraction accordingly. The paper has evaluated the suitable methods of extracting non-ground features and the effective segmentation of the LiDAR data

  12. The Extraction of Vegetation Points from LiDAR Using 3D Fractal Dimension Analyses

    Directory of Open Access Journals (Sweden)

    Haiquan Yang

    2015-08-01

    Full Text Available Light Detection and Ranging (LiDAR, a high-precision technique used for acquiring three-dimensional (3D surface information, is widely used to study surface vegetation information. Moreover, the extraction of a vegetation point set from the LiDAR point cloud is a basic starting-point for vegetation information analysis, and an important part of its further processing. To extract the vegetation point set completely and to describe the different spatial morphological characteristics of various features in a LiDAR point cloud, we have used 3D fractal dimensions. We discovered that every feature has its own distinctive 3D fractal dimension interval. Based on the 3D fractal dimensions of tall trees, we propose a new method for the extraction of vegetation using airborne LiDAR. According to this method, target features can be distinguished based on their morphological characteristics. The non-ground points acquired by filtering are processed by region growing segmentation and the morphological characteristics are evaluated by 3D fractal dimensions to determine the features required for the determination of the point set for tall trees. Avon, New York, USA was selected as the study area to test the method and the result proves the method’s efficiency. Thus, this approach is feasible. Additionally, the method uses the 3D coordinate properties of the LiDAR point cloud and does not require additional information, such as return intensity, giving it a larger scope of application.

  13. Localized Segment Based Processing for Automatic Building Extraction from LiDAR Data

    Science.gov (United States)

    Parida, G.; Rajan, K. S.

    2017-05-01

    The current methods of object segmentation and extraction and classification of aerial LiDAR data is manual and tedious task. This work proposes a technique for object segmentation out of LiDAR data. A bottom-up geometric rule based approach was used initially to devise a way to segment buildings out of the LiDAR datasets. For curved wall surfaces, comparison of localized surface normals was done to segment buildings. The algorithm has been applied to both synthetic datasets as well as real world dataset of Vaihingen, Germany. Preliminary results show successful segmentation of the buildings objects from a given scene in case of synthetic datasets and promissory results in case of real world data. The advantages of the proposed work is non-dependence on any other form of data required except LiDAR. It is an unsupervised method of building segmentation, thus requires no model training as seen in supervised techniques. It focuses on extracting the walls of the buildings to construct the footprint, rather than focussing on roof. The focus on extracting the wall to reconstruct the buildings from a LiDAR scene is crux of the method proposed. The current segmentation approach can be used to get 2D footprints of the buildings, with further scope to generate 3D models. Thus, the proposed method can be used as a tool to get footprints of buildings in urban landscapes, helping in urban planning and the smart cities endeavour.

  14. LOCALIZED SEGMENT BASED PROCESSING FOR AUTOMATIC BUILDING EXTRACTION FROM LiDAR DATA

    Directory of Open Access Journals (Sweden)

    G. Parida

    2017-05-01

    Full Text Available The current methods of object segmentation and extraction and classification of aerial LiDAR data is manual and tedious task. This work proposes a technique for object segmentation out of LiDAR data. A bottom-up geometric rule based approach was used initially to devise a way to segment buildings out of the LiDAR datasets. For curved wall surfaces, comparison of localized surface normals was done to segment buildings. The algorithm has been applied to both synthetic datasets as well as real world dataset of Vaihingen, Germany. Preliminary results show successful segmentation of the buildings objects from a given scene in case of synthetic datasets and promissory results in case of real world data. The advantages of the proposed work is non-dependence on any other form of data required except LiDAR. It is an unsupervised method of building segmentation, thus requires no model training as seen in supervised techniques. It focuses on extracting the walls of the buildings to construct the footprint, rather than focussing on roof. The focus on extracting the wall to reconstruct the buildings from a LiDAR scene is crux of the method proposed. The current segmentation approach can be used to get 2D footprints of the buildings, with further scope to generate 3D models. Thus, the proposed method can be used as a tool to get footprints of buildings in urban landscapes, helping in urban planning and the smart cities endeavour.

  15. Performance Assessment of High Resolution Airborne Full Waveform LiDAR for Shallow River Bathymetry

    Directory of Open Access Journals (Sweden)

    Zhigang Pan

    2015-04-01

    Full Text Available We evaluate the performance of full waveform LiDAR decomposition algorithms with a high-resolution single band airborne LiDAR bathymetry system in shallow rivers. A continuous wavelet transformation (CWT is proposed and applied in two fluvial environments, and the results are compared to existing echo retrieval methods. LiDAR water depths are also compared to independent field measurements. In both clear and turbid water, the CWT algorithm outperforms the other methods if only green LiDAR observations are available. However, both the definition of the water surface, and the turbidity of the water significantly influence the performance of the LiDAR bathymetry observations. The results suggest that there is no single best full waveform processing algorithm for all bathymetric situations. Overall, the optimal processing strategies resulted in a determination of water depths with a 6 cm mean at 14 cm standard deviation for clear water, and a 16 cm mean and 27 cm standard deviation in more turbid water.

  16. Using LiDAR to as a Potential Method for Detection Plastics in Water

    Science.gov (United States)

    Lee, G.; Neal, A.; Mielke, R.; Bookhagen, B.

    2010-12-01

    We conducted a series of experiments using Light Detection and Range (LiDAR) technology as an innovative way to detect the presence of plastics in water. The purpose of this study was to determine if LiDAR technology is a feasible, non-intrusive alternative to dredging in the ocean to determine the amount of plastics in the ocean. We used a tripod mounted RIEGL LMS-Z420i terrestrial LiDAR 3-D scanner and the associated operating software RiSCAN Pro. The terrestrial LiDAR is an optical remote sensing technology that measures the reflection of near infared light to find the range of a distant target that is most commonly used to create high precision digital elevation models of terrestrial surfaces. In theory, water should absorb the near infared light, while the plastics should reflect the light. The experiments consisted of different scale models of plastic pellets in water, ranging from a small plastic dish to a large tank to test the range of the LiDAR in different salt and fresh water mediums.

  17. EL PAPEL DE LOS MUNICIPIOS COLOMBIANOS EN LA PLANEACION Y GESTION DEL DESARROLLO LOCAL: SUS FUNDAMENTOS TEORICO-CONCEPTUALES

    Directory of Open Access Journals (Sweden)

    Oscar Hernan Muñoz

    2001-07-01

    Full Text Available A partir de la crisis de los paradigmas del desarrollo y el neoliberalismo se dio un cambio en el tratamiento del desarrollo, visto como “un desarrollo a escala humana”, que acepta lo global, lo regional y lo local. Este nuevo enfoque del Desarrollo Local Endógeno permite reforzar la capacidad de la localidad para buscar formas autónomas de Desarrollo económico, social, político, etc., con base en la utilización plena de sus recursos. Dentro de este contexto se identifican seis condiciones básicas, que permiten potenciar el Desarrollo Local Endógeno: existencia de un tejido humano dinámico; identidad social; existencia de centros sociales dinámicos; densidad y diversidad de redes de información; capacidad social para asimilar cambios y el grado de diversificación del mercado de trabajo. Al mismo tiempo, se presentan factores que pueden obstaculizar el desarrollo como: bajos niveles de formación del recurso humano; carencias en el acopio y procesamiento de información; escaso desarrollo de la planificación y de gestión pública y privada, entre otros. Para abordar el estudio del Desarrollo Local Endógeno es necesario analizar la dinámica interna y sus interrelaciones con otros espacios. A escala interna se analizan aspectos locales relacionados con los recursos materiales y humanos, el poder y la organización social local y las relaciones económicas. A escala externa, el análisis del Desarrollo Local abarca elementos relacionados con vías de acceso; control y manejo del transporte y aprovechamiento de productos y personas; capacidad de liderazgo político y económico; sistemas locales de información y políticas de apoyo al desarrollo social. Un factor básico de la planeación y gestión del Desarrollo Local es el relacionado con la construcción de procesos de comunicación entre los actores locales, públicos, privados y comunitarios. La nueva lógica de la planeación tiene como objetivo la estructuración de

  18. Evaluación de la variabilidad fenotípica de plantas de Stylosanthes guianensis regeneradas a partir de cultivo de tejidos

    Directory of Open Access Journals (Sweden)

    Pineda R. Omaira

    1988-12-01

    Full Text Available La variabilidad fenotípica en plantas de Stylosanthes guianensis CIAT 2243 tipo "tardío" fue evaluada en plantas regeneradas a partir de cultivo de tejidos. 100 clones provenientes de hojas fueron regenerados y se llevaron al campo en un diseño de bloques completamente al azar. De 11 características evaluadas, se encontró variación en número cromosómico, vigor, número de tallos, tipo de crecimiento, área foliar, reacción al ataque de antracnosis y porcentaje de materia seca.Phenotypic variability in Stylosanthes guianensis CIAT 2243 was evaluated in plants regenerated from tissue culture. 100 leaf derived clones were regenerated and were taken 10 the field under a randomized block distribution. Out of eleven parameters of evaluation, regenerated clones displayed significant variation in: chromosome number, plant vigor, number of stems, leaf area, growth habit, reaction to antracnose and dry matter content. The other parameters internode length, lateral expansion, seed production and seed size showed no significant variation among clones, The greater variability produced was associated with chromosome number increase.

  19. Low temperature grain boundary diffusion of chromium in SUS316 and 316L stainless steels

    International Nuclear Information System (INIS)

    Mizouchi, Masaki; Yamazaki, Yoshihiro; Iijima, Yoshiaki; Arioka, Koji

    2004-01-01

    Grain boundary diffusivity of chromium is SUS316 and 316L stainless steels has been determined in the temperature range between 518 and 1173 K. The magnitudes of the grain boundary diffusivities in four kinds of specimens are in the order of the cold-worked SUS316, the solution-treated SUS316L, the solution-treated SUS316 and the sensitized SUS316. The grain boundary diffusivities in these specimens are remarkably higher than those of previous works. The activation energies for the former are 85-91 kJmol -1 , whereas those for the latter are 151-234 kJmol -1 . (author)

  20. Interiores y Hannah y sus hermanas: artistas y creadores en el cine de Woody Allen

    Directory of Open Access Journals (Sweden)

    Francisco Casado Pérez

    2015-01-01

    Full Text Available Las reflexiones acerca del arte y las que tienen a los artistas que producen las obras como protagonistas son ejes fundamen- tales en la obra del cineasta neoyorquino Woody Allen. Mediante el estudio de dos de sus películas, Interiores y Hannah y sus hermanas, se analizan las diferentes actitudes de sus personajes al hacer frente a sus pulsiones creativas y cómo estas afectan a sus comportamientos en sociedad. En la primera, prácticamente todos los personajes proyectan en sus vidas sus insatisfacciones a la hora de desarrollar su arte, ya sea la escritura, la fotografía, la decoración, el cine o la interpretación. En la segunda, dos personajes, un pintor y un guionista televisivo, ofrecen más claves para dilucidar el amargo valor que da Allen a la labor artística.

  1. Determinants of acceptance of cervical cancer screening in Dar es Salaam, Tanzania

    DEFF Research Database (Denmark)

    Kahesa, Crispin; Kjaer, Susanne; Mwaiselage, Julius

    2012-01-01

    to accept screening in comparison with women who had five or more children (ORs 3.21). Finally, knowledge of cervical cancer and awareness of the existing screening program were also associated with increased acceptance rates (ORs of 5.90 and 4.20). CONCLUSION: There are identifiable subgroups where...... cervical cancer screening can be increased in Dar es Salaam. Special attention should be paid to women of low education and women of high parity. In addition, knowledge and awareness raising campaigns that goes hand in hand with culturally acceptable screening services will likely lead to an increased......ABSTRACT: OBJECTIVE: To describe how demographic characteristics and knowledge of cervical cancer influence screening acceptance among women living in Dar es Salaam, Tanzania. METHODS: Multistage cluster sampling was carried out in 45 randomly selected streets in Dar es Salaam. Women between...

  2. Detailed Hydrographic Feature Extraction from High-Resolution LiDAR Data

    Energy Technology Data Exchange (ETDEWEB)

    Danny L. Anderson

    2012-05-01

    Detailed hydrographic feature extraction from high-resolution light detection and ranging (LiDAR) data is investigated. Methods for quantitatively evaluating and comparing such extractions are presented, including the use of sinuosity and longitudinal root-mean-square-error (LRMSE). These metrics are then used to quantitatively compare stream networks in two studies. The first study examines the effect of raster cell size on watershed boundaries and stream networks delineated from LiDAR-derived digital elevation models (DEMs). The study confirmed that, with the greatly increased resolution of LiDAR data, smaller cell sizes generally yielded better stream network delineations, based on sinuosity and LRMSE. The second study demonstrates a new method of delineating a stream directly from LiDAR point clouds, without the intermediate step of deriving a DEM. Direct use of LiDAR point clouds could improve efficiency and accuracy of hydrographic feature extractions. The direct delineation method developed herein and termed “mDn”, is an extension of the D8 method that has been used for several decades with gridded raster data. The method divides the region around a starting point into sectors, using the LiDAR data points within each sector to determine an average slope, and selecting the sector with the greatest downward slope to determine the direction of flow. An mDn delineation was compared with a traditional grid-based delineation, using TauDEM, and other readily available, common stream data sets. Although, the TauDEM delineation yielded a sinuosity that more closely matches the reference, the mDn delineation yielded a sinuosity that was higher than either the TauDEM method or the existing published stream delineations. Furthermore, stream delineation using the mDn method yielded the smallest LRMSE.

  3. Portable and Airborne Small Footprint LiDAR: Forest Canopy Structure Estimation of Fire Managed Plots

    Directory of Open Access Journals (Sweden)

    Claudia M.C.S. Listopad

    2011-06-01

    Full Text Available This study used an affordable ground-based portable LiDAR system to provide an understanding of the structural differences between old-growth and secondary-growth Southeastern pine. It provided insight into the strengths and weaknesses in the structural determination of portable systems in contrast to airborne LiDAR systems. Portable LiDAR height profiles and derived metrics and indices (e.g., canopy cover, canopy height were compared among plots with different fire frequency and fire season treatments within secondary forest and old growth plots. The treatments consisted of transitional season fire with four different return intervals: 1-yr, 2-yr, 3-yr fire return intervals, and fire suppressed plots. The remaining secondary plots were treated using a 2-yr late dormant season fire cycle. The old growth plots were treated using a 2-yr growing season fire cycle. Airborne and portable LiDAR derived canopy cover were consistent throughout the plots, with significantly higher canopy cover values found in 3-yr and fire suppressed plots. Portable LiDAR height profile and metrics presented a higher sensitivity in capturing subcanopy elements than the airborne system, particularly in dense canopy plots. The 3-dimensional structures of the secondary plots with varying fire return intervals were dramatically different to old-growth plots, where a symmetrical distribution with clear recruitment was visible. Portable LiDAR, even though limited to finer spatial scales and specific biases, is a low-cost investment with clear value for the management of forest canopy structure.

  4. Diversity arrays technology (DArT) markers in apple for genetic linkage maps.

    Science.gov (United States)

    Schouten, Henk J; van de Weg, W Eric; Carling, Jason; Khan, Sabaz Ali; McKay, Steven J; van Kaauwen, Martijn P W; Wittenberg, Alexander H J; Koehorst-van Putten, Herma J J; Noordijk, Yolanda; Gao, Zhongshan; Rees, D Jasper G; Van Dyk, Maria M; Jaccoud, Damian; Considine, Michael J; Kilian, Andrzej

    2012-03-01

    Diversity Arrays Technology (DArT) provides a high-throughput whole-genome genotyping platform for the detection and scoring of hundreds of polymorphic loci without any need for prior sequence information. The work presented here details the development and performance of a DArT genotyping array for apple. This is the first paper on DArT in horticultural trees. Genetic mapping of DArT markers in two mapping populations and their integration with other marker types showed that DArT is a powerful high-throughput method for obtaining accurate and reproducible marker data, despite the low cost per data point. This method appears to be suitable for aligning the genetic maps of different segregating populations. The standard complexity reduction method, based on the methylation-sensitive PstI restriction enzyme, resulted in a high frequency of markers, although there was 52-54% redundancy due to the repeated sampling of highly similar sequences. Sequencing of the marker clones showed that they are significantly enriched for low-copy, genic regions. The genome coverage using the standard method was 55-76%. For improved genome coverage, an alternative complexity reduction method was examined, which resulted in less redundancy and additional segregating markers. The DArT markers proved to be of high quality and were very suitable for genetic mapping at low cost for the apple, providing moderate genome coverage. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11032-011-9579-5) contains supplementary material, which is available to authorized users.

  5. Synchronous Adversarial Feature Learning for LiDAR based Loop Closure Detection

    OpenAIRE

    Yin, Peng; He, Yuqing; Xu, Lingyun; Peng, Yan; Han, Jianda; Xu, Weiliang

    2018-01-01

    Loop Closure Detection (LCD) is the essential module in the simultaneous localization and mapping (SLAM) task. In the current appearance-based SLAM methods, the visual inputs are usually affected by illumination, appearance and viewpoints changes. Comparing to the visual inputs, with the active property, light detection and ranging (LiDAR) based point-cloud inputs are invariant to the illumination and appearance changes. In this paper, we extract 3D voxel maps and 2D top view maps from LiDAR ...

  6. Evaluating UAV and LiDAR Retrieval of Snow Depth in a Coniferous Forest in Arizona

    Science.gov (United States)

    Van Leeuwen, W. J. D.; Broxton, P.; Biederman, J. A.

    2017-12-01

    Remote sensing of snow depth and cover in forested environments is challenging. Trees interfere with the remote sensing of snowpack below the canopy and cause large variations in the spatial distribution of the snowpack itself (e.g. between below canopy environments to shaded gaps to open clearings). The distribution of trees and topographic variation make it challenging to monitor the snowpack with in-situ observations. Airborne LiDAR has improved our ability to monitor snowpack over large areas in montane and forested environments because of its high sampling rate and ability to penetrate the canopy. However, these LiDAR flights can be too expensive and time-consuming to process, making it hard to use them for real-time snow monitoring. In this research, we evaluate Structure from Motion (SfM) as an alternative to Airborne LiDAR to generate high-resolution snow depth data in forested environments. This past winter, we conducted a snow field campaign over Arizona's Mogollon Rim where we acquired aerial LiDAR, multi-angle aerial photography from a UAV, and extensive field observations of snow depth at two sites. LiDAR and SFM derived snow depth maps were generated by comparing "snow-on" and "snow-off" LiDAR and SfM data. The SfM- and LiDAR-generated snow depth maps were similar at a site with fewer trees, though there were more discrepancies at a site with more trees. Both compared reasonably well with the field observations at the sparser forested site, with poorer agreement at the denser forested site. Finally, although the SfM produced point clouds with much higher point densities than the aerial LiDAR, the SfM was not able to produce meaningful snow depth estimates directly underneath trees and had trouble in areas with deep shadows. Based on these findings, we are optimizing our UAV data acquisition strategies for this upcoming field season. We are using these data, along with high-resolution hydrological modeling, to gain a better understanding of how

  7. MKENO-DAR: a direct angular representation Monte Carlo code for criticality safety analysis

    International Nuclear Information System (INIS)

    Naito, Yoshitaka; Komuro, Yuichi; Tsunoo, Yukiyasu; Nakayama, Mitsuo.

    1984-03-01

    Improving the Monte Carlo code MULTI-KENO, the MKENO-DAR (Direct Angular Representation) code has been developed for criticality safety analysis in detail. A function was added to MULTI-KENO for representing anisotropic scattering strictly. With this function, the scattering angle of neutron is determined not by the average scattering angle μ-bar of the Pl Legendre polynomial but by the random work operation using probability distribution function produced with the higher order Legendre polynomials. This code is avilable for the FACOM-M380 computer. This report is a computer code manual for MKENO-DAR. (author)

  8. Coastal and tidal landform detection from high resolution topobathymetric LiDAR data

    DEFF Research Database (Denmark)

    Andersen, Mikkel S.; Al-Hamdani, Zyad K.; Steinbacher, Frank

    -resolution mapping of these land-water transition zones. We have carried out topobathymetric LiDAR surveys in the Knudedyb tidal inlet system, a coastal environment in the Danish Wadden Sea which is part of the Wadden Sea National Park and UNESCO World Heritage. Detailed digital elevation models (DEMs) with a grid...... to tides. Furthermore, we demonstrate the potential of morphometric analysis on high-resolution topobathymetric LiDAR data for automatic identification, characterisation and classification of different landforms present in coastal land-water transition zones. Acknowledgements This work was funded...

  9. Numerical modeling of the airflow around a forest edge using LiDAR-derived forest heigths

    DEFF Research Database (Denmark)

    Boudreault, Louis-Etienne; Dellwik, Ebba; Bechmann, Andreas

    A 3D methodology to quantify the effect of forests on the mean wind flow field is presented. The methodology is based on the treatment of forest raw data of light detection and ranging (LiDAR) scans, and a computational fluid dynamics (CFD) method based on a Reynolds-averaged Navier-Stokes (Ra......NS) approach using the k−e turbulence model with a corresponding canopy model. The example site investigated is a forest edge located on the Falster island in Denmark, where a measurement campaign was conducted. The LiDAR scans are used in order to obtain the forest heights, which served as input...

  10. La etnobotánica: su alcance y sus objetos

    Directory of Open Access Journals (Sweden)

    Schultes Richard Evans

    1941-11-01

    Full Text Available Existe entre la Botánica y la Antropología una ciencia intermedia a la que, desde hace medio siglo, se ha dado el nombre de Etnobotánica. Como ocurre con otras ciencias interfacultativas o interdisciplinales la Etnobotánica no se puede definir fácilmente y por esto ha habido muchas diferencias de opinión en cuanto a su alcance y sus objetos. En su más amplio sentido, la Etnobotánica es el estudio de las relaciones que existen entre el hombre y su ambiente vegetal, es decir las plantas que lo rodean. En un sentido más restringido, se ha considerado solamente como el estudio del uso de las plantas cultivadas y silvestres por los pueblos primitivos, usualmente los aborígenes.

  11. Diferença de Classe no SUS é inconstitucional!

    Directory of Open Access Journals (Sweden)

    Alethele de Oliveira Santos

    2015-12-01

    Full Text Available A discussão sobre a ‘diferença de classe’ decorre do Recurso Extraordinário (RE 581488 interposto pelo Conselho Regional de Medicina do Rio Grande do Sul (Cremers em face da decisão do Tribunal Regional Federal da 4ªRegião (TRF –4ª, em favor do município de Canela (RS (1 junto ao Supremo Tribunal Federal (STF, com repercussão geral  reconhecida sob o número 579. Trata-se da possibilidade de que paciente do Sistema Único de Saúde (SUS pague valor financeiro por hotelaria diferenciada, ou ainda, médico de sua preferência.

  12. Migrantes culiacanenses en California: Diversidad en sus redes migratorias

    Directory of Open Access Journals (Sweden)

    Ernesto SÁNCHEZ SÁNCHEZ

    2012-01-01

    Full Text Available Es un hecho la dinámica extraordinaria que tienen los lugares de reciente migración, ya sea como lugares de origen o destino. El estado de Sinaloa se suma a esta dinámica en la cual aparecen ahora sus tres principales zonas urbanas --Culiacán, Mazatlán y Ahome-- dentro de su mapa migratorio. Sin embargo la migración, como proceso social, implica una serie de interrelaciones formadas tiempo atrás. Éstas repercuten en la conformación de las nuevas redes migratorias. No obstante, durante décadas, las principales zonas de expulsión en Sinaloa han sido rurales y siguen teniendo un papel esencial en las actuales relaciones sociales de los migrantes provenientes de Culiacán.

  13. The role of dentists in the Unified Health System (SUS)

    OpenAIRE

    Aerts, Denise; Abegg, Claídes; Cesa, Kátia

    2004-01-01

    O Sistema Único de Saúde é um processo social em construção permanente, sendo fundamental a contínua discussão sobre seu modelo de atenção, os paradigmas explicativos do processo saúde-doença que o embasam e o papel de diferentes profissionais que nele atuam. Esse trabalho objetiva a discussão sobre a atuação do cirurgião-dentista no SUS. Uma forma de sistematizar suas possibilidades de atuação é a sua inserção no sistema. Em nível central ou distrital, deve atuar em equipes interdisciplinare...

  14. Los filósofos griegos y sus escuelas

    Directory of Open Access Journals (Sweden)

    Solana Dueso, José

    2008-06-01

    Full Text Available The Greek philosophy developed three types of philosophical schools. The first one, represented by the Milesians, the Eleatics and partly the Aristotle’s Lyceum, understands the philosophical activity as a set of projects of investigation, not necessarily lacking of pragmatic interest, moved by desire to explain the phenomena. Next to their activities of investigation, many of these philosophers maintain a political activity within the framework of their own cities. The second type, represented by the Pythagoreans and the Academy of Plato, aims to reach the union between knowledge and political power. This proposal finds its better synthesis in the ideal of philosopher king. At the hellenistic period, the goal of philosophical schools would be to offer the cultivated and instructed man a particular way of life.La filosofía griega desarrolló tres tipos de escuelas filosóficas. El primero, representado por los milesios, los eleáticos y, en parte, el Liceo de Aristóteles, entiende la actividad filosófica como un conjunto de proyectos de investigación, no necesariamente carentes de interés pragmático, movidos por el deseo de explicar los fenómenos. Junto a sus actividades de investigación, muchos de estos filósofos mantienen una actividad política en el marco de las instituciones de sus propias ciudades. El segundo tipo, representado por los pitagóricos y la Academia platónica, se propone alcanzar la unión entre el saber y el poder. Esta propuesta halla su mejor síntesis en el ideal del filósofo rey. Finalmente, en la época helenística, las escuelas filosóficas se proponen sobre todo ofrecer un ideal de vida al hombre culto e instruido de su tiempo.

  15. Validation of the high-throughput marker technology DArT using the model plant Arabidopsis thaliana

    NARCIS (Netherlands)

    Wittenberg, A.H.J.; Lee, van der T.A.J.; Cayla, C.; Kilian, A.; Visser, R.G.F.; Schouten, H.J.

    2005-01-01

    Diversity Arrays Technology (DArT) is a microarray-based DNA marker technique for genome-wide discovery and genotyping of genetic variation. DArT allows simultaneous scoring of hundreds of restriction site based polymorphisms between genotypes and does not require DNA sequence information or

  16. Remote Sensing of Sonoran Desert Vegetation Structure and Phenology with Ground-Based LiDAR

    Directory of Open Access Journals (Sweden)

    Joel B. Sankey

    2014-12-01

    Full Text Available Long-term vegetation monitoring efforts have become increasingly important for understanding ecosystem response to global change. Many traditional methods for monitoring can be infrequent and limited in scope. Ground-based LiDAR is one remote sensing method that offers a clear advancement to monitor vegetation dynamics at high spatial and temporal resolution. We determined the effectiveness of LiDAR to detect intra-annual variability in vegetation structure at a long-term Sonoran Desert monitoring plot dominated by cacti, deciduous and evergreen shrubs. Monthly repeat LiDAR scans of perennial plant canopies over the course of one year had high precision. LiDAR measurements of canopy height and area were accurate with respect to total station survey measurements of individual plants. We found an increase in the number of LiDAR vegetation returns following the wet North American Monsoon season. This intra-annual variability in vegetation structure detected by LiDAR was attributable to a drought deciduous shrub Ambrosia deltoidea, whereas the evergreen shrub Larrea tridentata and cactus Opuntia engelmannii had low variability. Benefits of using LiDAR over traditional methods to census desert plants are more rapid, consistent, and cost-effective data acquisition in a high-resolution, 3-dimensional context. We conclude that repeat LiDAR measurements can be an effective method for documenting ecosystem response to desert climatology and drought over short time intervals and at detailed-local spatial scale.

  17. Comparing LiDAR-Generated to ground- surveyed channel cross-sectional profiles in a forested mountain stream

    Science.gov (United States)

    Brian C. Dietterick; Russell White; Ryan Hilburn

    2012-01-01

    Airborne Light Detection and Ranging (LiDAR) holds promise to provide an alternative to traditional ground-based survey methods for stream channel characterization and some change detection purposes, even under challenging landscape conditions. This study compared channel characteristics measured at 53 ground-surveyed and LiDAR-derived crosssectional profiles located...

  18. Prevalence of teeth with untreated dental trauma among nursery and primary school pupils in Dar es Salaam, Tanzania.

    NARCIS (Netherlands)

    Kahabuka, F.K.; Plasschaert, A.J.M.; Hof, M.A. van 't

    2001-01-01

    The aim of this study was to investigate the prevalence of teeth with untreated dental trauma among children aged 4-15 years in Dar es Salaam, Tanzania. A sample of 4524 children from three districts of different socio-economic status in the Dar es Salaam area was examined for signs of dental trauma

  19. Carbazole-based copolymers via direct arylation polymerization (DArP) for Suzuki-convergent polymer solar cell performance

    DEFF Research Database (Denmark)

    Gobalasingham, Nemal S.; Ekiz, Seyma; Pankow, Robert M.

    2017-01-01

    Although direct arylation polymerization (DArP) has recently emerged as an alternative to traditional cross-coupling methods like Suzuki polymerization, the evaluation of DArP polymers in practical applications like polymer solar cells (PSCs) is limited. Because even the presence of minute...

  20. Airborne LiDAR reflective linear feature extraction for strip adjustment and horizontal accuracy determination : executive summary.

    Science.gov (United States)

    2009-02-01

    The Office of Aerial Engineering (OAE) has been : using an Optech 30/70 ALTM airborne LiDAR system : for about four years. The introduction of LiDAR : technology was a major development towards : improving the mapping operations, and the overall : ex...

  1. Computer-based synthetic data to assess the tree delineation algorithm from airborne LiDAR survey

    Science.gov (United States)

    Lei Wang; Andrew G. Birt; Charles W. Lafon; David M. Cairns; Robert N. Coulson; Maria D. Tchakerian; Weimin Xi; Sorin C. Popescu; James M. Guldin

    2013-01-01

    Small Footprint LiDAR (Light Detection And Ranging) has been proposed as an effective tool for measuring detailed biophysical characteristics of forests over broad spatial scales. However, by itself LiDAR yields only a sample of the true 3D structure of a forest. In order to extract useful forestry relevant information, this data must be interpreted using mathematical...

  2. Investigating the influence of LiDAR ground surface errors on the utility of derived forest inventories

    Science.gov (United States)

    Wade T. Tinkham; Alistair M. S. Smith; Chad Hoffman; Andrew T. Hudak; Michael J. Falkowski; Mark E. Swanson; Paul E. Gessler

    2012-01-01

    Light detection and ranging, or LiDAR, effectively produces products spatially characterizing both terrain and vegetation structure; however, development and use of those products has outpaced our understanding of the errors within them. LiDAR's ability to capture three-dimensional structure has led to interest in conducting or augmenting forest inventories with...

  3. Registration of Aerial Optical Images with LiDAR Data Using the Closest Point Principle and Collinearity Equations.

    Science.gov (United States)

    Huang, Rongyong; Zheng, Shunyi; Hu, Kun

    2018-06-01

    Registration of large-scale optical images with airborne LiDAR data is the basis of the integration of photogrammetry and LiDAR. However, geometric misalignments still exist between some aerial optical images and airborne LiDAR point clouds. To eliminate such misalignments, we extended a method for registering close-range optical images with terrestrial LiDAR data to a variety of large-scale aerial optical images and airborne LiDAR data. The fundamental principle is to minimize the distances from the photogrammetric matching points to the terrestrial LiDAR data surface. Except for the satisfactory efficiency of about 79 s per 6732 × 8984 image, the experimental results also show that the unit weighted root mean square (RMS) of the image points is able to reach a sub-pixel level (0.45 to 0.62 pixel), and the actual horizontal and vertical accuracy can be greatly improved to a high level of 1/4⁻1/2 (0.17⁻0.27 m) and 1/8⁻1/4 (0.10⁻0.15 m) of the average LiDAR point distance respectively. Finally, the method is proved to be more accurate, feasible, efficient, and practical in variety of large-scale aerial optical image and LiDAR data.

  4. Integrated remote sensing and visualization (IRSV) system for transportation infrastructure operations and management, phase two, volume 3 : advanced consideration in LiDAR technology for bridge evaluation.

    Science.gov (United States)

    2012-03-01

    This report describes Phase Two enhancement of terrestrial LiDAR scanning for bridge damage : evaluation that was initially developed in Phase One. Considering the spatial and reflectivity : information contained in LiDAR scans, two detection algorit...

  5. Integrated remote sensing and visualization (IRSV) system for transportation infrastructure operations and management, phase one, volume 3 : use of scanning LiDAR in structural evaluation of bridges.

    Science.gov (United States)

    2009-12-01

    This volume introduces several applications of remote bridge inspection technologies studied in : this Integrated Remote Sensing and Visualization (IRSV) study using ground-based LiDAR : systems. In particular, the application of terrestrial LiDAR fo...

  6. KML-Based Access and Visualization of High Resolution LiDAR Topography

    Science.gov (United States)

    Crosby, C. J.; Blair, J. L.; Nandigam, V.; Memon, A.; Baru, C.; Arrowsmith, J. R.

    2008-12-01

    Over the past decade, there has been dramatic growth in the acquisition of LiDAR (Light Detection And Ranging) high-resolution topographic data for earth science studies. Capable of providing digital elevation models (DEMs) more than an order of magnitude higher resolution than those currently available, LiDAR data allow earth scientists to study the processes that contribute to landscape evolution at resolutions not previously possible yet essential for their appropriate representation. These datasets also have significant implications for earth science education and outreach because they provide an accurate representation of landforms and geologic hazards. Unfortunately, the massive volume of data produced by LiDAR mapping technology can be a barrier to their use. To make these data available to a larger user community, we have been exploring the use of Keyhole Markup Language (KML) and Google Earth to provide access to LiDAR data products and visualizations. LiDAR digital elevation models are typically delivered in a tiled format that lends itself well to a KML-based distribution system. For LiDAR datasets hosted in the GEON OpenTopography Portal (www.opentopography.org) we have developed KML files that show the extent of available LiDAR DEMs and provide direct access to the data products. Users interact with these KML files to explore the extent of the available data and are able to select DEMs that correspond to their area of interest. Selection of a tile loads a download that the user can then save locally for analysis in their software of choice. The GEON topography system also has tools available that allow users to generate custom DEMs from LiDAR point cloud data. This system is powerful because it enables users to access massive volumes of raw LiDAR data and to produce DEM products that are optimized to their science applications. We have developed a web service that converts the custom DEM models produced by the system to a hillshade that is delivered to

  7. Docentes de inglés de primaria, secundaria y terciaria: Sus creencias pedagógicas sobre sus estudiantes

    Directory of Open Access Journals (Sweden)

    Claudio Díaz-Larenas

    2015-01-01

    Full Text Available Como agente reflexivo de su propia práctica, el profesorado construye creencias pedagógicas sobre el proceso de enseñanza y aprendizaje y, en particular, sobre el rol que sus estudiantes deben asumir en el aprendizaje de un idioma. Este estudio tiene como objetivo identificar las creencias pedagógicas de treinta docentes de inglés de primaria, secundaria y terciaria, en Chile, sobre el rol estudiantil en el proceso didáctico. Un cuestionario, una entrevista semi-estructurada, un diario auto-biográfico y cinco diarios de observación no-participante fueron utilizados para revelar las creencias pedagógicas de sus informantes. Los datos arrojados por los instrumentos fueron analizados con el programa cualitativo ATLASTI, que permitió el levantamiento de tres dimensiones y diez categorías, mediante el uso de la técnica del análisis de contenido semántico. Los resultados muestran que los tres grupos de profesorado declaran que estudiantes que aprenden una lengua extranjera deben tener características personales y académicas relacionadas con la motivación, la participación, la autonomía, entre otras; sin embargo, al interior del aula asumen un rol pasivo y reactivo frente al ambiente de enseñanza altamente estructurado que genera el personal docente. En conclusión, las creencias que cada docente sostiene se alimentan de la teoría y se corroboran o cuestionan en la práctica de aula, a modo de una relación bidireccional entre teoría y práctica, y viceversa.

  8. Interpersonal Conflicts and Styles of Managing Conflicts among Students at Bahir Dar University, Ethiopia

    Science.gov (United States)

    Bazezew, Arega; Neka, Mulugeta

    2017-01-01

    Interpersonal conflict happens everywhere and at any time and is inherent in all societies. However, the methods of managing such conflict are quite different from one organisation to the other. The general objective of the study was to assess interpersonal conflicts and styles of managing conflicts among students at Bahir Dar University.…

  9. 2014 U.S. Geological Survey CMGP LiDAR: Post Sandy (Pennsylvania)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Fugro EarthData, Inc. (Fugro) was tasked by the U.S. Geological Survey (USGS) to plan, acquire, process, and produce derivative products of LiDAR data at a nominal...

  10. Automatic extraction of pavement markings on streets from point cloud data of mobile LiDAR

    International Nuclear Information System (INIS)

    Gao, Yang; Zhong, Ruofei; Liu, Xianlin; Tang, Tao; Wang, Liuzhao

    2017-01-01

    Pavement markings provide an important foundation as they help to keep roads users safe. Accurate and comprehensive information about pavement markings assists the road regulators and is useful in developing driverless technology. Mobile light detection and ranging (LiDAR) systems offer new opportunities to collect and process accurate pavement markings’ information. Mobile LiDAR systems can directly obtain the three-dimensional (3D) coordinates of an object, thus defining spatial data and the intensity of (3D) objects in a fast and efficient way. The RGB attribute information of data points can be obtained based on the panoramic camera in the system. In this paper, we present a novel method process to automatically extract pavement markings using multiple attribute information of the laser scanning point cloud from the mobile LiDAR data. This method process utilizes a differential grayscale of RGB color, laser pulse reflection intensity, and the differential intensity to identify and extract pavement markings. We utilized point cloud density to remove the noise and used morphological operations to eliminate the errors. In the application, we tested our method process on different sections of roads in Beijing, China, and Buffalo, NY, USA. The results indicated that both correctness ( p ) and completeness ( r ) were higher than 90%. The method process of this research can be applied to extract pavement markings from huge point cloud data produced by mobile LiDAR. (paper)

  11. The Dar es Salaam Seascape: A Case Study of an Environmental ...

    African Journals Online (AJOL)

    These pressures have resulted in substantial negative environmental state changes, e.g., habitat loss and degradation, biodiversity loss and disturbance of food webs, and coastal erosion/accretion. Thus, the Dar es Salaam seascape has become an environmental “hotspot” of degradation, with consequent negative ...

  12. LiDAR Relative Reflectivity Surface (2011) for Coral Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution relative seafloor reflectivity surface for Coral Bay, St. John in the U.S....

  13. International Journal of Arts and Humanities(IJAH) Bahir Dar- Ethiopia

    African Journals Online (AJOL)

    DrNneka

    International Journal of Arts and Humanities(IJAH). Bahir Dar- Ethiopia. Vol. 5(2), S/No 17, April, ... Commission's accreditation exercise on personnel in the business education programmes of the universities in the South-east .... education personnel in universities. Method. The study adopted descriptive survey design.

  14. Linking rainforest ecophysiology and microclimate through fusion of airborne LiDAR and hyperspectral imagery

    Science.gov (United States)

    Eben N. Broadbent; Angélica M. Almeyda Zambrano; Gregory P. Asner; Christopher B. Field; Brad E. Rosenheim; Ty Kennedy-Bowdoin; David E. Knapp; David Burke; Christian Giardina; Susan Cordell

    2014-01-01

    We develop and validate a high-resolution three-dimensional model of light and air temperature for a tropical forest interior in Hawaii along an elevation gradient varying greatly in structure but maintaining a consistent species composition. Our microclimate models integrate high-resolution airborne waveform light detection and ranging data (LiDAR) and hyperspectral...

  15. Examining conifer canopy structural complexity across forest ages and elevations with LiDAR data

    Science.gov (United States)

    Van R. Kane; Jonathan D. Bakker; Robert J. McGaughey; James A. Lutz; Rolf F. Gersonde; Jerry F. Franklin

    2010-01-01

    LiDAR measurements of canopy structure can be used to classify forest stands into structural stages to study spatial patterns of canopy structure, identify habitat, or plan management actions. A key assumption in this process is that differences in canopy structure based on forest age and elevation are consistent with predictions from models of stand development. Three...

  16. Geospatial revolution and remote sensing LiDAR in Mesoamerican archaeology

    Science.gov (United States)

    Chase, Arlen F.; Fisher, Christopher T.; Leisz, Stephen J.; Weishampel, John F.

    2012-01-01

    The application of light detection and ranging (LiDAR), a laser-based remote-sensing technology that is capable of penetrating overlying vegetation and forest canopies, is generating a fundamental shift in Mesoamerican archaeology and has the potential to transform research in forested areas world-wide. Much as radiocarbon dating that half a century ago moved archaeology forward by grounding archaeological remains in time, LiDAR is proving to be a catalyst for an improved spatial understanding of the past. With LiDAR, ancient societies can be contextualized within a fully defined landscape. Interpretations about the scale and organization of densely forested sites no longer are constrained by sample size, as they were when mapping required laborious on-ground survey. The ability to articulate ancient landscapes fully permits a better understanding of the complexity of ancient Mesoamerican urbanism and also aids in modern conservation efforts. The importance of this geospatial innovation is demonstrated with newly acquired LiDAR data from the archaeological sites of Caracol, Cayo, Belize and Angamuco, Michoacán, Mexico. These data illustrate the potential of technology to act as a catalytic enabler of rapid transformational change in archaeological research and interpretation and also underscore the value of on-the-ground archaeological investigation in validating and contextualizing results. PMID:22802623

  17. 2002 Maryland Department of Natural Resources LiDAR: Worcester County

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Light Detection and Ranging (LiDAR) is a method of locating objects on the ground using aerial-borne equipment. It is similar to RADAR or SONAR in that the two-way...

  18. Multispectral LiDAR Data for Land Cover Classification of Urban Areas

    Directory of Open Access Journals (Sweden)

    Salem Morsy

    2017-04-01

    Full Text Available Airborne Light Detection And Ranging (LiDAR systems usually operate at a monochromatic wavelength measuring the range and the strength of the reflected energy (intensity from objects. Recently, multispectral LiDAR sensors, which acquire data at different wavelengths, have emerged. This allows for recording of a diversity of spectral reflectance from objects. In this context, we aim to investigate the use of multispectral LiDAR data in land cover classification using two different techniques. The first is image-based classification, where intensity and height images are created from LiDAR points and then a maximum likelihood classifier is applied. The second is point-based classification, where ground filtering and Normalized Difference Vegetation Indices (NDVIs computation are conducted. A dataset of an urban area located in Oshawa, Ontario, Canada, is classified into four classes: buildings, trees, roads and grass. An overall accuracy of up to 89.9% and 92.7% is achieved from image classification and 3D point classification, respectively. A radiometric correction model is also applied to the intensity data in order to remove the attenuation due to the system distortion and terrain height variation. The classification process is then repeated, and the results demonstrate that there are no significant improvements achieved in the overall accuracy.

  19. Analysis of airborne LiDAR surveys to quantify the characteristic morphologies of northern forested wetlands

    Science.gov (United States)

    Murray C. Richardson; Carl P. J. Mitchell; Brian A. Branfireun; Randall K. Kolka

    2010-01-01

    A new technique for quantifying the geomorphic form of northern forested wetlands from airborne LiDAR surveys is introduced, demonstrating the unprecedented ability to characterize the geomorphic form of northern forested wetlands using high-resolution digital topography. Two quantitative indices are presented, including the lagg width index (LWI) which objectively...

  20. Development of DArT-based PCR markers for selecting drought-tolerant spring barley.

    Science.gov (United States)

    Fiust, Anna; Rapacz, Marcin; Wójcik-Jagła, Magdalena; Tyrka, Mirosław

    2015-08-01

    The tolerance of spring barley (Hordeum vulgare L.) cultivars to spring drought is an important agronomic trait affecting crop yield and quality in Poland. Therefore, breeders require new molecular markers to select plants with lower spring drought susceptibility. With the advent of genomic selection technology, simple molecular tools may still be applicable to screen material for markers of the most important traits and in-depth genome scanning. In previous studies, diversity arrays technology (DArT)-based genetic maps were constructed for F2 populations of Polish fodder and malt barley elite breeding lines, and 15 and 18 quantitative trait loci (QTLs) related to spring drought tolerance were identified, respectively. In this paper, we show the results of a conversion of 30 DArT markers corresponding to 11 QTLs into simple sequence repeat (SSR) and sequence tagged site (STS) markers. Twenty-two polymorphic markers were obtained, including 13 DArT-based SSRs. Additionally, 31 SSR markers, located in close proximity to the DArT markers, were selected from the GrainGenes database and tested. Further analyses of 24 advanced breeding lines with different drought tolerances confirmed that five out of the 30 converted markers, as well as three out of the 31 additional SSR markers, were effective in marker-assisted selection for drought tolerance. The possible function of clones related to these markers in drought tolerance is discussed.

  1. Child Labour in Urban Agriculture: The Case of Dar es Salaam, Tanzania.

    Science.gov (United States)

    Mlozi, Malongo R. S.

    1995-01-01

    Urban agriculture in Dar es Salaam was found to use child labor of both children with parents of higher and lower socioeconomic status (SES). Discusses policy implications and calls for the education of parents of lower SES not to expect an economic contribution from their children's labor, and the education of children about their rights. (LZ)

  2. How Children Living in Poor Areas of Dar Es Salaam, Tanzania Perceive Their Own Multiple Intelligences

    Science.gov (United States)

    Dixon, Pauline; Humble, Steve; Chan, David W.

    2016-01-01

    This study was carried out with 1,857 poor children from 17 schools, living in low-income areas of Dar Es Salaam, Tanzania. All children took the "Student Multiple Intelligences Profile" (SMIP) questionnaire as part of a bigger project that gathered data around concepts and beliefs of talent. This paper sets out two aims, first to…

  3. Genetics and Human Agency: Comment on Dar-Nimrod and Heine (2011)

    Science.gov (United States)

    Turkheimer, Eric

    2011-01-01

    Dar-Nimrod and Heine (2011) decried genetic essentialism without denying the importance of genetics in the genesis of human behavior, and although I agree on both counts, a deeper issue remains unaddressed: how should we adjust our cognitions about our own behavior in light of genetic influence, or is it perhaps not necessary to take genetics into…

  4. 2012-2013 U.S. Geological Survey LiDAR: Territory of Guam

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Territory of Guam, LiDAR Task G11PD01189 This task order is for production of surface model products of The Territory of Guam. The models are produced from data...

  5. Patterns and correlates of solid waste disposal practices in Dar es ...

    African Journals Online (AJOL)

    This study examines the patterns and correlations of solid waste disposal practices among households in urbanized and populated Dar es Salaam city in Tanzania. The Tanzanian Household Budget Survey (HBS) data covering many households' characteristics was used. Multinomial Logit (MNL) model was applied to ...

  6. Fast and nondestructive method for leaf level chlorophyll estimation using hyperspectral LiDAR

    NARCIS (Netherlands)

    Nevalainen, O.; Hakala, T.; Suomalainen, J.M.; Mäkipää, R.; Peltoniemi, M.; Krooks, A.; Kaasalainen, S.

    2014-01-01

    We propose an empirical method for nondestructive estimation of chlorophyll in tree canopies. The first prototype of a full waveform hyperspectral LiDAR instrument has been developed by the Finnish Geodetic Institute (FGI). The instrument efficiently combines the benefits of passive and active

  7. Key events and their effects on cycling behaviour in Dar-es-Salaam : abstract + powerpoint

    NARCIS (Netherlands)

    Nkurunziza, A.; Zuidgeest, M.H.P.; Brussel, M.J.G.; van Maarseveen, M.F.A.M.

    2012-01-01

    The paper explores key events and investigates their effects on cycling behaviour in the city of Dar-es-Salaam, Tanzania. The objective of the study is to identify specific key events during a person’s life course with a significant effect on change of travel behaviour towards cycling in relation to

  8. LiDAR based prediction of forest biomass using hierarchical models with spatially varying coefficients

    Science.gov (United States)

    Chad Babcock; Andrew O. Finley; John B. Bradford; Randy Kolka; Richard Birdsey; Michael G. Ryan

    2015-01-01

    Many studies and production inventory systems have shown the utility of coupling covariates derived from Light Detection and Ranging (LiDAR) data with forest variables measured on georeferenced inventory plots through regression models. The objective of this study was to propose and assess the use of a Bayesian hierarchical modeling framework that accommodates both...

  9. Pit Latrine Emptying Behavior and Demand for Sanitation Services in Dar Es Salaam, Tanzania

    Directory of Open Access Journals (Sweden)

    Marion W. Jenkins

    2015-02-01

    Full Text Available Pit latrines are the main form of sanitation in unplanned areas in many rapidly growing developing cities. Understanding demand for pit latrine fecal sludge management (FSM services in these communities is important for designing demand-responsive sanitation services and policies to improve public health. We examine latrine emptying knowledge, attitudes, behavior, trends and rates of safe/unsafe emptying, and measure demand for a new hygienic latrine emptying service in unplanned communities in Dar Es Salaam (Dar, Tanzania, using data from a cross-sectional survey at 662 residential properties in 35 unplanned sub-wards across Dar, where 97% had pit latrines. A picture emerges of expensive and poor FSM service options for latrine owners, resulting in widespread fecal sludge exposure that is likely to increase unless addressed. Households delay emptying as long as possible, use full pits beyond what is safe, face high costs even for unhygienic emptying, and resort to unsafe practices like ‘flooding out’. We measured strong interest in and willingness to pay (WTP for the new pit emptying service at 96% of residences; 57% were WTP ≥U.S. $17 to remove ≥200 L of sludge. Emerging policy recommendations for safe FSM in unplanned urban communities in Dar and elsewhere are discussed.

  10. 2010 U.S. Geological Survey (USGS) Topographic LiDAR: Mobile Bay, AL

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — USGS Contract: G10PC00026 Task Order Number: G10PD00578 LiDAR was collected at a nominal pulse spacing of 2.0 meters for a 700 square mile area to the east of Mobile...

  11. The effect of El Nino on trypanosome infection in cattle in Dar es ...

    African Journals Online (AJOL)

    A retrospective study was carried out to assess the effect of El Nino on trypanosome infection in cattle. Trypanosome infection was monitored in free grazing dairy cattle before and after El Nino in Dar es Salaam. The study involved 49 smallholder dairy herds with a total of 570 dairy cattle. Trypanosomes were identified by ...

  12. A comparison of two open source LiDAR surface classification algorithms

    Science.gov (United States)

    With the progression of LiDAR (Light Detection and Ranging) towards a mainstream resource management tool, it has become necessary to understand how best to process and analyze the data. While most ground surface identification algorithms remain proprietary and have high purchase costs; a few are op...

  13. Land Cover Segmentation of Airborne LiDAR Data Using Stochastic Atrous Network

    Directory of Open Access Journals (Sweden)

    Hasan Asy’ari Arief

    2018-06-01

    Full Text Available Inspired by the success of deep learning techniques in dense-label prediction and the increasing availability of high precision airborne light detection and ranging (LiDAR data, we present a research process that compares a collection of well-proven semantic segmentation architectures based on the deep learning approach. Our investigation concludes with the proposition of some novel deep learning architectures for generating detailed land resource maps by employing a semantic segmentation approach. The contribution of our work is threefold. (1 First, we implement the multiclass version of the intersection-over-union (IoU loss function that contributes to handling highly imbalanced datasets and preventing overfitting. (2 Thereafter, we propose a novel deep learning architecture integrating the deep atrous network architecture with the stochastic depth approach for speeding up the learning process, and impose a regularization effect. (3 Finally, we introduce an early fusion deep layer that combines image-based and LiDAR-derived features. In a benchmark study carried out using the Follo 2014 LiDAR data and the NIBIO AR5 land resources dataset, we compare our proposals to other deep learning architectures. A quantitative comparison shows that our best proposal provides more than 5% relative improvement in terms of mean intersection-over-union over the atrous network, providing a basis for a more frequent and improved use of LiDAR data for automatic land cover segmentation.

  14. planning for the automation of the university of dar es salaam library

    African Journals Online (AJOL)

    The paper examines the planning process for the automation of the University of Dar es Salaam Library. The planning phases described include the preparation phase, planning for implementation and database construction. The major issues during the preparation phase are the discussion on the context of automation, ...

  15. Mapping snags and understory shrubs for LiDAR based assessment of wildlife habitat suitability

    Science.gov (United States)

    Sebastian Martinuzzi; Lee A. Vierling; William A. Gould; Michael J. Falkowski; Jeffrey S. Evans; Andrew T. Hudak; Kerri T. Vierling

    2009-01-01

    The lack of maps depicting forest three-dimensional structure, particularly as pertaining to snags and understory shrub species distribution, is a major limitation for managing wildlife habitat in forests. Developing new techniques to remotely map snags and understory shrubs is therefore an important need. To address this, we first evaluated the use of LiDAR data for...

  16. Real-time surveillance system for marine environment based on HLIF LiDAR

    Science.gov (United States)

    Babichenko, Sergey; Sobolev, Innokenti; Aleksejev, Valeri; Sõro, Oliver

    2017-10-01

    The operational monitoring of the risk areas of marine environment requires cost-effective solutions. One of the options is the use of sensor networks based on fixed installations and moving platforms (coastal boats, supply-, cargo-, and passenger vessels). Such network allows to gather environmental data in time and space with direct links to operational activities in the controlled area for further environmental risk assessment. Among many remote sensing techniques the LiDAR (Light Detection And Ranging) based on Light Induced Fluorescence (LIF) is the tool of direct assessment of water quality variations caused by chemical pollution, colored dissolved organic matter, and phytoplankton composition. The Hyperspectral LIF (HLIF) LiDAR acquires comprehensive LIF spectra and analyses them by spectral pattern recognition technique to detect and classify the substances in water remotely. Combined use of HLIF LiDARs with Real-Time Data Management System (RTDMS) provides the economically effective solution for the regular monitoring in the controlled area. OCEAN VISUALS in cooperation with LDI INNOVATION has developed Oil in Water Locator (OWL™) with RTDMS (OWL MAP™) based on HLIF LiDAR technique. This is a novel technical solution for monitoring of marine environment providing continuous unattended operations. OWL™ has been extensively tested on board of various vessels in the North Sea, Norwegian Sea, Barents Sea, Baltic Sea and Caribbean Sea. This paper describes the technology features, the results of its operational use in 2014-2017, and outlook for the technology development.

  17. Multispectral LiDAR Data for Land Cover Classification of Urban Areas.

    Science.gov (United States)

    Morsy, Salem; Shaker, Ahmed; El-Rabbany, Ahmed

    2017-04-26

    Airborne Light Detection And Ranging (LiDAR) systems usually operate at a monochromatic wavelength measuring the range and the strength of the reflected energy (intensity) from objects. Recently, multispectral LiDAR sensors, which acquire data at different wavelengths, have emerged. This allows for recording of a diversity of spectral reflectance from objects. In this context, we aim to investigate the use of multispectral LiDAR data in land cover classification using two different techniques. The first is image-based classification, where intensity and height images are created from LiDAR points and then a maximum likelihood classifier is applied. The second is point-based classification, where ground filtering and Normalized Difference Vegetation Indices (NDVIs) computation are conducted. A dataset of an urban area located in Oshawa, Ontario, Canada, is classified into four classes: buildings, trees, roads and grass. An overall accuracy of up to 89.9% and 92.7% is achieved from image classification and 3D point classification, respectively. A radiometric correction model is also applied to the intensity data in order to remove the attenuation due to the system distortion and terrain height variation. The classification process is then repeated, and the results demonstrate that there are no significant improvements achieved in the overall accuracy.

  18. Heavy metal contamination in agricultural soils and water in Dar es ...

    African Journals Online (AJOL)

    USER

    Department of Environmental Science and Management, Ardhi University, P. O. Box 35176, Dar es Salaam, Tanzania. Accepted 20 ... opportunities, demand for food, proximity to markets and ... serious environmental and public health effects. One of ... concentrations they can lead to poisoning (Cambra et al.,. 1999).

  19. Hyperspectral and LiDAR remote sensing of fire fuels in Hawaii Volcanoes National Park.

    Science.gov (United States)

    Varga, Timothy A; Asner, Gregory P

    2008-04-01

    Alien invasive grasses threaten to transform Hawaiian ecosystems through the alteration of ecosystem dynamics, especially the creation or intensification of a fire cycle. Across sub-montane ecosystems of Hawaii Volcanoes National Park on Hawaii Island, we quantified fine fuels and fire spread potential of invasive grasses using a combination of airborne hyperspectral and light detection and ranging (LiDAR) measurements. Across a gradient from forest to savanna to shrubland, automated mixture analysis of hyperspectral data provided spatially explicit fractional cover estimates of photosynthetic vegetation, non-photosynthetic vegetation, and bare substrate and shade. Small-footprint LiDAR provided measurements of vegetation height along this gradient of ecosystems. Through the fusion of hyperspectral and LiDAR data, a new fire fuel index (FFI) was developed to model the three-dimensional volume of grass fuels. Regionally, savanna ecosystems had the highest volumes of fire fuels, averaging 20% across the ecosystem and frequently filling all of the three-dimensional space represented by each image pixel. The forest and shrubland ecosystems had lower FFI values, averaging 4.4% and 8.4%, respectively. The results indicate that the fusion of hyperspectral and LiDAR remote sensing can provide unique information on the three-dimensional properties of ecosystems, their flammability, and the potential for fire spread.

  20. Modeling commuter preferences for the proposed bus rapid transit in Dar-es-Salaam

    NARCIS (Netherlands)

    Nkurunziza, A.; Zuidgeest, M.H.P.; Brussel, M.J.G.; van Maarseveen, M.F.A.M.

    2012-01-01

    The paper analyzes individual commuter preferences towards the proposed bus rapid transit (BRT) system in Dar-es-Salaam, Tanzania. The objective of the survey was to identify how commuters perceive and value the proposed BRT service quality attributes. A stated preference survey of potential users

  1. A LiDAR method of canopy structure retrieval for wind modeling of heterogeneous forests

    DEFF Research Database (Denmark)

    Boudreault, Louis-Etienne; Bechmann, Andreas; Taryainen, Lasse

    2015-01-01

    and this information is required for each grid point in the three-dimensional computational domain. By using raw data from aerial LiDAR scans together with the Beer-Lambert law, we propose and test a method to calculate and grid highly variable and realistic frontal area density input. An extensive comparison...

  2. Effect of Tree Phenology on LiDAR Measurement of Mediterranean Forest Structure

    Directory of Open Access Journals (Sweden)

    William Simonson

    2018-04-01

    Full Text Available Retrieval of forest biophysical properties using airborne LiDAR is known to differ between leaf-on and leaf-off states of deciduous trees, but much less is understood about the within-season effects of leafing phenology. Here, we compare two LiDAR surveys separated by just six weeks in spring, in order to assess whether LiDAR variables were influenced by canopy changes in Mediterranean mixed-oak woodlands at this time of year. Maximum and, to a slightly lesser extent, mean heights were consistently measured, whether for the evergreen cork oak (Quercus suber or semi-deciduous Algerian oak (Q. canariensis woodlands. Estimates of the standard deviation and skewness of height differed more strongly, especially for Algerian oaks which experienced considerable leaf expansion in the time period covered. Our demonstration of which variables are more or less affected by spring-time leafing phenology has important implications for analyses of both canopy and sub-canopy vegetation layers from LiDAR surveys.

  3. Automatic extraction of pavement markings on streets from point cloud data of mobile LiDAR

    Science.gov (United States)

    Gao, Yang; Zhong, Ruofei; Tang, Tao; Wang, Liuzhao; Liu, Xianlin

    2017-08-01

    Pavement markings provide an important foundation as they help to keep roads users safe. Accurate and comprehensive information about pavement markings assists the road regulators and is useful in developing driverless technology. Mobile light detection and ranging (LiDAR) systems offer new opportunities to collect and process accurate pavement markings’ information. Mobile LiDAR systems can directly obtain the three-dimensional (3D) coordinates of an object, thus defining spatial data and the intensity of (3D) objects in a fast and efficient way. The RGB attribute information of data points can be obtained based on the panoramic camera in the system. In this paper, we present a novel method process to automatically extract pavement markings using multiple attribute information of the laser scanning point cloud from the mobile LiDAR data. This method process utilizes a differential grayscale of RGB color, laser pulse reflection intensity, and the differential intensity to identify and extract pavement markings. We utilized point cloud density to remove the noise and used morphological operations to eliminate the errors. In the application, we tested our method process on different sections of roads in Beijing, China, and Buffalo, NY, USA. The results indicated that both correctness (p) and completeness (r) were higher than 90%. The method process of this research can be applied to extract pavement markings from huge point cloud data produced by mobile LiDAR.

  4. Assessment of Ploidy and Genome Constitution of Some Musa balbisiana Cultivars using DArT Markers

    Czech Academy of Sciences Publication Activity Database

    Sales, E. K.; Butardo, N. G.; Paniagua, H. G.; Jansen, H.; Doležel, Jaroslav

    2011-01-01

    Roč. 36, č. 1 (2011), s. 11-18 ISSN 0115-463X Institutional research plan: CEZ:AV0Z50380511 Keywords : DArT * genome * Musa balbisiana Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 0.075, year: 2011 http://home.ueb.cas.cz/publikace/2011_Sales_PHILIPPINE_JOURNAL_OF_CROP_SCIENCE_11.pdf

  5. Geospatial revolution and remote sensing LiDAR in Mesoamerican archaeology.

    Science.gov (United States)

    Chase, Arlen F; Chase, Diane Z; Fisher, Christopher T; Leisz, Stephen J; Weishampel, John F

    2012-08-07

    The application of light detection and ranging (LiDAR), a laser-based remote-sensing technology that is capable of penetrating overlying vegetation and forest canopies, is generating a fundamental shift in Mesoamerican archaeology and has the potential to transform research in forested areas world-wide. Much as radiocarbon dating that half a century ago moved archaeology forward by grounding archaeological remains in time, LiDAR is proving to be a catalyst for an improved spatial understanding of the past. With LiDAR, ancient societies can be contextualized within a fully defined landscape. Interpretations about the scale and organization of densely forested sites no longer are constrained by sample size, as they were when mapping required laborious on-ground survey. The ability to articulate ancient landscapes fully permits a better understanding of the complexity of ancient Mesoamerican urbanism and also aids in modern conservation efforts. The importance of this geospatial innovation is demonstrated with newly acquired LiDAR data from the archaeological sites of Caracol, Cayo, Belize and Angamuco, Michoacán, Mexico. These data illustrate the potential of technology to act as a catalytic enabler of rapid transformational change in archaeological research and interpretation and also underscore the value of on-the-ground archaeological investigation in validating and contextualizing results.

  6. Generalised small signal analysis of a DAR /Double Avalanche Region/ IMPATT diode

    Science.gov (United States)

    Datta, D. N.; Pal, B. B.

    1982-06-01

    A generalized small signal analysis of a DAR IMPATT diode is carried out using recent values of ionization rates and saturated drift velocities of electrons and holes for Si and GaAs taking both the drift and the diffusion of charge carriers into account. The results show similar discrete negative conductance frequency bands separated by positive conductance frequency bands for an asymmetrical structure as in the ideal case (Som et al., 1974), establishing that the harmonically related frequencies can be avoided in the Si DAR IMPATT diode. In contrast to the ideal case, however, the symmetrical DAR IMPATT here also exhibits finite negative conductance. The GaAs DAR IMPATT shows variations of negative conductance that are similar to those in Si at high frequencies (in the mm wave range); at the low frequency side (less than 1 GHz), however, the IMPATT gives uniform negative conductances unlike Si where the negative conductance comes only at higher frequencies. Consideration is given in the calculations to thin depletion layers (0.8, 1, and 2 microns) to show the usefulness of the device in the mm wave range.

  7. 2006 Federal Emergency Management Agency (FEMA) Topographic LiDAR: Cumberland and York Counties, Maine

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — In the fall of 2006, Sanborn Map Company was contracted by Camp Dresser McKee, Inc (CDM) to execute a LiDAR (Light Detection and Ranging) survey campaign in the...

  8. 2009 U.S. Geological Survey (USGS) Topographic LiDAR: Androscoggin County, Maine

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — USGS Contract Number: G10PC00026 USGS Task Order: G10PD01737 LiDAR was collected at a 1.0 points per square meter (1.0m GSD) for the county of Androscoggin, Maine...

  9. A comparison of two open source LiDAR surface classification algorithms

    Science.gov (United States)

    Wade T. Tinkham; Hongyu Huang; Alistair M.S. Smith; Rupesh Shrestha; Michael J. Falkowski; Andrew T. Hudak; Timothy E. Link; Nancy F. Glenn; Danny G. Marks

    2011-01-01

    With the progression of LiDAR (Light Detection and Ranging) towards a mainstream resource management tool, it has become necessary to understand how best to process and analyze the data. While most ground surface identification algorithms remain proprietary and have high purchase costs; a few are openly available, free to use, and are supported by published results....

  10. Line-Based Registration of Panoramic Images and LiDAR Point Clouds for Mobile Mapping

    Directory of Open Access Journals (Sweden)

    Tingting Cui

    2016-12-01

    Full Text Available For multi-sensor integrated systems, such as the mobile mapping system (MMS, data fusion at sensor-level, i.e., the 2D-3D registration between an optical camera and LiDAR, is a prerequisite for higher level fusion and further applications. This paper proposes a line-based registration method for panoramic images and a LiDAR point cloud collected by a MMS. We first introduce the system configuration and specification, including the coordinate systems of the MMS, the 3D LiDAR scanners, and the two panoramic camera models. We then establish the line-based transformation model for the panoramic camera. Finally, the proposed registration method is evaluated for two types of camera models by visual inspection and quantitative comparison. The results demonstrate that the line-based registration method can significantly improve the alignment of the panoramic image and the LiDAR datasets under either the ideal spherical or the rigorous panoramic camera model, with the latter being more reliable.

  11. Implications of sensor configuration and topography on vertical plant profiles derived from terrestrial LiDAR

    NARCIS (Netherlands)

    Calders, K.; Armston, J.; Newnham, G.; Herold, M.; Goodwin, N.

    2014-01-01

    The vertical distribution of plant constituents is a key parameter to describe vegetation structure and influences several processes, such as radiation interception, growth and habitat. Terrestrial laser scanning (TLS), also referred to as terrestrial LiDAR, has the potential to measure the canopy

  12. LiDAR Relative Reflectivity Surface (2011) for Fish Bay, St. John

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This image represents a LiDAR (Light Detection & Ranging) 0.3x0.3 meter resolution relative seafloor reflectivity surface for Fish Bay, St. John in the U.S....

  13. La concepción del tiempo de Henri Bergson: El alcance de sus críticas a la tradición y los límites de su originalidad

    Directory of Open Access Journals (Sweden)

    Axel Cherniavsky

    2006-11-01

    Full Text Available Bergson critica a la tradición filosófica el hecho de haber pensado el tiempo espacialmente, el hecho de atribuirle las notas del espacio: la homogeneidad, la divisibilidad y la simultaneidad. A través de un análisis de las concepciones de la temporalidad de Kant y Husserl, intentaremos limitar las críticas de Bergson para sugerir que la originalidad de la noción de durée no consiste en sus notas intrínsecas (la heterogeneidad, la continuidad y la sucesión, ni en la paradójica alianza que se pueda dar entre ellas (como lo revela la crítica de Bachelard, sino en la posición extrínseca de la noción en relación a las otras nociones del sistema.

  14. Using Satellite and Airborne LiDAR to Model Woodpecker Habitat Occupancy at the Landscape Scale

    Science.gov (United States)

    Vierling, Lee A.; Vierling, Kerri T.; Adam, Patrick; Hudak, Andrew T.

    2013-01-01

    Incorporating vertical vegetation structure into models of animal distributions can improve understanding of the patterns and processes governing habitat selection. LiDAR can provide such structural information, but these data are typically collected via aircraft and thus are limited in spatial extent. Our objective was to explore the utility of satellite-based LiDAR data from the Geoscience Laser Altimeter System (GLAS) relative to airborne-based LiDAR to model the north Idaho breeding distribution of a forest-dependent ecosystem engineer, the Red-naped sapsucker (Sphyrapicus nuchalis). GLAS data occurred within ca. 64 m diameter ellipses spaced a minimum of 172 m apart, and all occupancy analyses were confined to this grain scale. Using a hierarchical approach, we modeled Red-naped sapsucker occupancy as a function of LiDAR metrics derived from both platforms. Occupancy models based on satellite data were weak, possibly because the data within the GLAS ellipse did not fully represent habitat characteristics important for this species. The most important structural variables influencing Red-naped Sapsucker breeding site selection based on airborne LiDAR data included foliage height diversity, the distance between major strata in the canopy vertical profile, and the vegetation density near the ground. These characteristics are consistent with the diversity of foraging activities exhibited by this species. To our knowledge, this study represents the first to examine the utility of satellite-based LiDAR to model animal distributions. The large area of each GLAS ellipse and the non-contiguous nature of GLAS data may pose significant challenges for wildlife distribution modeling; nevertheless these data can provide useful information on ecosystem vertical structure, particularly in areas of gentle terrain. Additional work is thus warranted to utilize LiDAR datasets collected from both airborne and past and future satellite platforms (e.g. GLAS, and the planned IceSAT2

  15. Application of LiDAR to hydrologic flux estimation in Australian eucalypt forests (Invited)

    Science.gov (United States)

    Lane, P. N.; Mitchell, P. J.; Jaskierniak, D.; Hawthorne, S. N.; Griebel, A.

    2013-12-01

    The potential of LiDAR in ecohydrology is significant as characterising catchment vegetation is crucial to accurate estimation of evapotranspiration (ET). While this may be done at large scales for model parameterisation, stand-scale applications are equally appropriate where traditional methods of measurement of LAI or sapwood areas are time consuming and reliant on assumptions of representative sampling. This is particularly challenging in mountain forests where aspect, soil properties and energy budgets can vary significantly, reflected in the vegetation or where there are changes in the spatial distribution of structural attributes following disturbance. Recent research has investigated the spatial distribution of ET in a eucalypt forest in SE Australia using plot-scale sapflow, interception and forest floor ET measurements. LiDAR was used scale up these measurements. LiDAR (0.16 m scanner footprint) canopy indices were correlated via stepwise regression with 4 water use scalars: basal area (BA), sapwood area (SA), leaf area index (LAI) and canopy coverage (C), with Hmed, Hmean, H80, H95 the best predictors. Combining these indices with empirical relationships between SA and BA, and SA and transpiration (T), and inventory plot 'ground truthing' transpiration was estimated across the 1.3 km2 catchment. Interception was scaled via the Gash model with LiDAR derived inputs. The up-scaling showed a significant variability in the spatial distribution of ET, related to the distribution of SA. The use of LiDAR meant scaling could be achieved at an appropriate spatial scale (20 x 20 m) to the measurements. The second example is the use of airborne LiDAR in developing growth forest models for hydrologic modeling. LiDAR indices were used to stratify multilayered forests using mixed-effect models with a wide range of theoretical distribution functions. When combined with historical plot-scale inventory data we show demonstrated improved growth modeling over traditional

  16. A veces también llueve para arriba: de travestis, sus amores y desamores

    Directory of Open Access Journals (Sweden)

    Luz Mary López Murcia

    2010-10-01

    estas, por un lado, se ubican en un orden heteronormativo del género y, por otro, legitiman y problematizan esta normatividad en sus modos de relacionarse consigo mismas y con los otros. En este texto se exponen algunos de los elementos que atraviesan la realidad de los travestis que ejercen la prostitución, a saber: la manera de construir sus identidades de género, sus nociones de la feminidad y la masculinidad, su cuerpo, sus concepciones sobre el amor y los roles que asumen y vivencian en las relaciones erótico-afectivas

  17. Estimating Stand Volume and Above-Ground Biomass of Urban Forests Using LiDAR

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    Vincenzo Giannico

    2016-04-01

    Full Text Available Assessing forest stand conditions in urban and peri-urban areas is essential to support ecosystem service planning and management, as most of the ecosystem services provided are a consequence of forest stand characteristics. However, collecting data for assessing forest stand conditions is time consuming and labor intensive. A plausible approach for addressing this issue is to establish a relationship between in situ measurements of stand characteristics and data from airborne laser scanning (LiDAR. In this study we assessed forest stand volume and above-ground biomass (AGB in a broadleaved urban forest, using a combination of LiDAR-derived metrics, which takes the form of a forest allometric model. We tested various methods for extracting proxies of basal area (BA and mean stand height (H from the LiDAR point-cloud distribution and evaluated the performance of different models in estimating forest stand volume and AGB. The best predictors for both models were the scale parameters of the Weibull distribution of all returns (except the first (proxy of BA and the 95th percentile of the distribution of all first returns (proxy of H. The R2 were 0.81 (p < 0.01 for the stand volume model and 0.77 (p < 0.01 for the AGB model with a RMSE of 23.66 m3·ha−1 (23.3% and 19.59 Mg·ha−1 (23.9%, respectively. We found that a combination of two LiDAR-derived variables (i.e., proxy of BA and proxy of H, which take the form of a forest allometric model, can be used to estimate stand volume and above-ground biomass in broadleaved urban forest areas. Our results can be compared to other studies conducted using LiDAR in broadleaved forests with similar methods.

  18. Development and mapping of DArT markers within the Festuca - Lolium complex

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    Studer Bruno

    2009-10-01

    Full Text Available Abstract Background Grasses are among the most important and widely cultivated plants on Earth. They provide high quality fodder for livestock, are used for turf and amenity purposes, and play a fundamental role in environment protection. Among cultivated grasses, species within the Festuca-Lolium complex predominate, especially in temperate regions. To facilitate high-throughput genome profiling and genetic mapping within the complex, we have developed a Diversity Arrays Technology (DArT array for five grass species: F. pratensis, F. arundinacea, F. glaucescens, L. perenne and L. multiflorum. Results The DArTFest array contains 7680 probes derived from methyl-filtered genomic representations. In a first marker discovery experiment performed on 40 genotypes from each species (with the exception of F. glaucescens for which only 7 genotypes were used, we identified 3884 polymorphic markers. The number of DArT markers identified in every single genotype varied from 821 to 1852. To test the usefulness of DArTFest array for physical mapping, DArT markers were assigned to each of the seven chromosomes of F. pratensis using single chromosome substitution lines while recombinants of F. pratensis chromosome 3 were used to allocate the markers to seven chromosome bins. Conclusion The resources developed in this project will facilitate the development of genetic maps in Festuca and Lolium, the analysis on genetic diversity, and the monitoring of the genomic constitution of the Festuca × Lolium hybrids. They will also enable marker-assisted selection for multiple traits or for specific genome regions.

  19. BUILDING DAMAGE ASSESSMENT AFTER EARTHQUAKE USING POST-EVENT LiDAR DATA

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    H. Rastiveis

    2015-12-01

    Full Text Available After an earthquake, damage assessment plays an important role in leading rescue team to help people and decrease the number of mortality. Damage map is a map that demonstrates collapsed buildings with their degree of damage. With this map, finding destructive buildings can be quickly possible. In this paper, we propose an algorithm for automatic damage map generation after an earthquake using post-event LiDAR Data and pre-event vector map. The framework of the proposed approach has four main steps. To find the location of all buildings on LiDAR data, in the first step, LiDAR data and vector map are registered by using a few number of ground control points. Then, building layer, selected from vector map, are mapped on the LiDAR data and all pixels which belong to the buildings are extracted. After that, through a powerful classifier all the extracted pixels are classified into three classes of “debris”, “intact building” and “unclassified”. Since textural information make better difference between “debris” and “intact building” classes, different textural features are applied during the classification. After that, damage degree for each candidate building is estimated based on the relation between the numbers of pixels labelled as “debris” class to the whole building area. Calculating the damage degree for each candidate building, finally, building damage map is generated. To evaluate the ability proposed method in generating damage map, a data set from Port-au-Prince, Haiti’s capital after the 2010 Haiti earthquake was used. In this case, after calculating of all buildings in the test area using the proposed method, the results were compared to the damage degree which estimated through visual interpretation of post-event satellite image. Obtained results were proved the reliability of the proposed method in damage map generation using LiDAR data.

  20. Object-oriented identification of forested landslides with derivatives of single pulse LiDAR data

    Science.gov (United States)

    Van Den Eeckhaut, Miet; Kerle, Norman; Poesen, Jean; Hervás, Javier

    2012-11-01

    In contrast to the many studies that use expert-based analysis of LiDAR derivatives for landslide mapping in forested terrain, only few studies have attempted to develop (semi-)automatic methods for extracting landslides from LiDAR derivatives. While all these studies are pixel-based, it has not yet been tested whether object-oriented analysis (OOA) could be an alternative. This study investigates the potential of OOA using only single-pulse LiDAR derivatives, such as slope gradient, roughness and curvature to map landslides. More specifically, the focus is on both LiDAR data segmentation and classification of slow-moving landslides in densely vegetated areas, where spectral data do not allow accurate landslide identification. A multistage procedure has been developed and tested in the Flemish Ardennes (Belgium). The procedure consists of (1) image binarization and multiresolution segmentation, (2) classification of landslide parts (main scarps and landslide body segments) and non-landslide features (i.e. earth banks and cropland fields) with supervised support vector machines at the appropriate scale, (3) delineation of landslide flanks, (4) growing of a landslide body starting from its main scarp, and (5) final cleaning of the inventory map. The results obtained show that OOA using LiDAR derivatives allows recognition and characterization of profound morphologic properties of forested deep-seated landslides on soil-covered hillslopes, because more than 90% of the main scarps and 70% of the landslide bodies of an expert-based inventory were accurately identified with OOA. For mountainous areas with bedrock, on the other hand, creation of a transferable model is expected to be more difficult.

  1. Applying a weighted random forests method to extract karst sinkholes from LiDAR data

    Science.gov (United States)

    Zhu, Junfeng; Pierskalla, William P.

    2016-02-01

    Detailed mapping of sinkholes provides critical information for mitigating sinkhole hazards and understanding groundwater and surface water interactions in karst terrains. LiDAR (Light Detection and Ranging) measures the earth's surface in high-resolution and high-density and has shown great potentials to drastically improve locating and delineating sinkholes. However, processing LiDAR data to extract sinkholes requires separating sinkholes from other depressions, which can be laborious because of the sheer number of the depressions commonly generated from LiDAR data. In this study, we applied the random forests, a machine learning method, to automatically separate sinkholes from other depressions in a karst region in central Kentucky. The sinkhole-extraction random forest was grown on a training dataset built from an area where LiDAR-derived depressions were manually classified through a visual inspection and field verification process. Based on the geometry of depressions, as well as natural and human factors related to sinkholes, 11 parameters were selected as predictive variables to form the dataset. Because the training dataset was imbalanced with the majority of depressions being non-sinkholes, a weighted random forests method was used to improve the accuracy of predicting sinkholes. The weighted random forest achieved an average accuracy of 89.95% for the training dataset, demonstrating that the random forest can be an effective sinkhole classifier. Testing of the random forest in another area, however, resulted in moderate success with an average accuracy rate of 73.96%. This study suggests that an automatic sinkhole extraction procedure like the random forest classifier can significantly reduce time and labor costs and makes its more tractable to map sinkholes using LiDAR data for large areas. However, the random forests method cannot totally replace manual procedures, such as visual inspection and field verification.

  2. A DArT marker genetic map of perennial ryegrass (Lolium perenne L.) integrated with detailed comparative mapping information; comparison with existing DArT marker genetic maps of Lolium perenne, L. multiflorum and Festuca pratensis.

    Science.gov (United States)

    King, Julie; Thomas, Ann; James, Caron; King, Ian; Armstead, Ian

    2013-07-03

    Ryegrasses and fescues (genera, Lolium and Festuca) are species of forage and turf grasses which are used widely in agricultural and amenity situations. They are classified within the sub-family Pooideae and so are closely related to Brachypodium distachyon, wheat, barley, rye and oats. Recently, a DArT array has been developed which can be used in generating marker and mapping information for ryegrasses and fescues. This represents a potential common marker set for ryegrass and fescue researchers which can be linked through to comparative genomic information for the grasses. A F2 perennial ryegrass genetic map was developed consisting of 7 linkage groups defined by 1316 markers and deriving a total map length of 683 cM. The marker set included 866 DArT and 315 gene sequence-based markers. Comparison with previous DArT mapping studies in perennial and Italian ryegrass (L. multiflorum) identified 87 and 105 DArT markers in common, respectively, of which 94% and 87% mapped to homoeologous linkage groups. A similar comparison with meadow fescue (F. pratensis) identified only 28 DArT markers in common, of which c. 50% mapped to non-homoelogous linkage groups. In L. perenne, the genetic distance spanned by the DArT markers encompassed the majority of the regions that could be described in terms of comparative genomic relationships with rice, Brachypodium distachyon, and Sorghum bicolor. DArT markers are likely to be a useful common marker resource for ryegrasses and fescues, though the success in aligning different populations through the mapping of common markers will be influenced by degrees of population interrelatedness. The detailed mapping of DArT and gene-based markers in this study potentially allows comparative relationships to be derived in future mapping populations characterised using solely DArT markers.

  3. La prostitución, una mirada desde sus actores

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    Luisa Fernanda Montoya Restrepo

    2015-01-01

    Full Text Available Este artículo surge de la investigación Aspectos sociales y familiares que conllevan al ejercicio de la prostitución a 14 jóvenes de la ciudad de Medellín, a partir de sus relatos de vida, que en su proceso de generación de información implementó entre otras estrategias, una serie de talleres con población –hombres y mujeres– en ejercicio de la prostitución y con el equipo profesional que les brinda atención psicosocial, como parte del desarrollo del diseño metodológico planteado para la generación de información. Con esta publicación se pretende reflexionar sobre las diferentes concepciones y significados que se le ha dado a la palabra prostitución, estigmatizada no solo desde el imaginario social, sino también desde la religión. Se retoman para ello algunas posturas disciplinares y especialmente las voces de los actores que participaron como fuentes originales en el proceso de investigación; por ende, se realizará un breve recorrido que recoja las connotaciones más comunes de las personas que ejercen cotidianamente la prostitución.

  4. Proton implantation effect on (SUS-316) stainless steel

    International Nuclear Information System (INIS)

    Das, A.K.; Ishigami, R.; Kamal, I.

    2015-01-01

    Microstructural damage and nano hardness of the industrial grade stainless steel (SUS-316) have been studied under proton (H + ) implanted condition applying different doses at room temperature. The implantation scheme such as proton energy, fluence, irradiation time, and penetration depth in the target materials were estimated by Monte Carlo Simulation Code SRIM-2008. In the simulation, the parameters were chosen in such a way that the damage density (displacement per atom or dpa) would be uniform up to certain depth from the surface. X-ray diffraction study of the annealed samples prior to the proton implantation showed the austenitic fcc structure and no significant change was observed after proton implantation in it. Microstructural observation made by Scanning Transmission Electron Microscopy (STEM) revealed that 1 dpa of proton-irradiation induced the structural damage extended up to 1 μm depth from the surface. The nano hardness study showed that the hardness level of the irradiated samples increased monotonically with the irradiation doses. Proton dose of 1 dpa caused 65% increment of hardness level on average in case of uniformly irradiated samples. It was realized that the increment of hardness was a consequence of microstructural damages caused by the formation of interstitial dislocation loops in the sample matrix keeping the lattice structure unaffected

  5. Results of fracture mechanics tests on PNC SUS 304 plate

    International Nuclear Information System (INIS)

    Mills, W.J.; James, L.A.; Blackburn, L.D.

    1985-08-01

    PNC provided SUS 304 plate to be irradiated in FFTF at about 400 0 C to a target fluence of 5 x 10 21 n/cm 2 (E > 0.1 MeV). The actual irradiation included two basically different exposure levels to assure that information would be available for the exposure of interest. After irradiation, tensile properties, fatigue-crack growth rates and J-integral fracture toughness response were determined. These same properties were also measured for the unirradiated material so radiation damage effects could be characterized. This report presents the results of this program. It is expected that these results would be applicable for detailed fracture analysis of reactor components. Recent advances in elastic-plastic fracture mechanics enable reasonably accurate predictions of failure conditions for flawed stainless steel components. Extensive research has focused on the development of J-integral-based engineering approach for assessing the load carrying capacity of low-strength, high-toughness structural materials. Furthermore, Kanninen, et al., have demonstrated that J-integral concepts can accurately predict the fracture response for full-scale cracked structures manufactured from Type 304 stainless steel

  6. Sindicalismo, SUS e planos de saúde Trade unionism, Unified Health System (SUS and private health insurance

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    José Augusto Pina

    2006-09-01

    Full Text Available Este artigo discute a interlocução do sindicalismo brasileiro com o Sistema Único de Saúde (SUS e os planos e seguros privados de saúde. São ponderadas algumas teses na Saúde Coletiva à luz de estudos mais recentes nas Ciências Sociais sobre o sindicalismo e realizada análise documental para o caso da Central Única dos Trabalhadores (CUT, tomado aqui como referência. Aponta-se a necessidade de considerar os pesos relativos que a ação sindical atribuiu a cada um dos aspectos da relação, SUS e planos privados de saúde, pelas distintas conjunturas do país. O conflito entre trabalhadores e empresas somado ao desemprego e à precarização do trabalho expõe os limites das coberturas assistenciais privadas e impele a representação sindical a pleitear a intervenção estatal. O trabalho refletiu sobre as distintas modalidades de ação sindical na empresa e no Estado. A complexidade dessa dinâmica fez emergir um setor sindical interessado na gestão da previdência complementar e dos planos de saúde e, ao mesmo tempo, recria as circunstâncias e traz novas possibilidades de as organizações sindicais se colocarem na cena política e aglutinar os interesses de amplos segmentos dos trabalhadores para pressionar o Estado na defesa da melhoria do sistema público de saúde.The article intends to discuss the patterns of interlocution between the Brazilian trade unionism, the public health system (SUS and the private health insurance sector. Some thesis originated in the Public Health area about the subject are debated, in the light of more recent Social Science's studies concerned the Brazilian unionism. It presents a documentary analysis for the case of the largest National Workers Organization, named CUT. The need to discuss the problem in distinct political and economic conjunctures of the country is pointed out. The conflicts between the workers and the companies, added to the unemployment and deregulation of the labor markets

  7. Development and validation of the Dimensional Anhedonia Rating Scale (DARS) in a community sample and individuals with major depression.

    Science.gov (United States)

    Rizvi, Sakina J; Quilty, Lena C; Sproule, Beth A; Cyriac, Anna; Michael Bagby, R; Kennedy, Sidney H

    2015-09-30

    Anhedonia, a core symptom of Major Depressive Disorder (MDD), is predictive of antidepressant non-response. In contrast to the definition of anhedonia as a "loss of pleasure", neuropsychological studies provide evidence for multiple facets of hedonic function. The aim of the current study was to develop and validate the Dimensional Anhedonia Rating Scale (DARS), a dynamic scale that measures desire, motivation, effort and consummatory pleasure across hedonic domains. Following item selection procedures and reliability testing using data from community participants (N=229) (Study 1), the 17-item scale was validated in an online study with community participants (N=150) (Study 2). The DARS was also validated in unipolar or bipolar depressed patients (n=52) and controls (n=50) (Study 3). Principal components analysis of the 17-item DARS revealed a 4-component structure mapping onto the domains of anhedonia: hobbies, food/drink, social activities, and sensory experience. Reliability of the DARS subscales was high across studies (Cronbach's α=0.75-0.92). The DARS also demonstrated good convergent and divergent validity. Hierarchical regression analysis revealed the DARS showed additional utility over the Snaith-Hamilton Pleasure Scale (SHAPS) in predicting reward function and distinguishing MDD subgroups. These studies provide support for the reliability and validity of the DARS. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  8. LiDAR-IMU Time Delay Calibration Based on Iterative Closest Point and Iterated Sigma Point Kalman Filter.

    Science.gov (United States)

    Liu, Wanli

    2017-03-08

    The time delay calibration between Light Detection and Ranging (LiDAR) and Inertial Measurement Units (IMUs) is an essential prerequisite for its applications. However, the correspondences between LiDAR and IMU measurements are usually unknown, and thus cannot be computed directly for the time delay calibration. In order to solve the problem of LiDAR-IMU time delay calibration, this paper presents a fusion method based on iterative closest point (ICP) and iterated sigma point Kalman filter (ISPKF), which combines the advantages of ICP and ISPKF. The ICP algorithm can precisely determine the unknown transformation between LiDAR-IMU; and the ISPKF algorithm can optimally estimate the time delay calibration parameters. First of all, the coordinate transformation from the LiDAR frame to the IMU frame is realized. Second, the measurement model and time delay error model of LiDAR and IMU are established. Third, the methodology of the ICP and ISPKF procedure is presented for LiDAR-IMU time delay calibration. Experimental results are presented that validate the proposed method and demonstrate the time delay error can be accurately calibrated.

  9. Improving low-relief coastal LiDAR DEMs with hydro-conditioning of fine-scale and artificial drainages

    Directory of Open Access Journals (Sweden)

    Thomas Richard Allen

    2015-11-01

    Full Text Available Improvements in Light Detection and Ranging (LiDAR technology and spatial analysis of high-resolution digital elevation models (DEMs have advanced the accuracy and diversity of applications for coastal hazards and natural resources management. This article presents a concise synthesis of LiDAR analysis for coastal flooding and management applications in low-relief coastal plains and a case study demonstration of a new, efficient drainage mapping algorithm. The impetus for these LiDAR applications follows historic flooding from Hurricane Floyd in 1999, after which the State of North Carolina and the Federal Emergency Management Agency undertook extensive LiDAR data acquisition and technological developments for high-resolution floodplain mapping. An efficient algorithm is outlined for hydro-conditioning bare earth LiDAR DEMs using available US Geological Survey National Hydrography Dataset canal and ditch vectors. The methodology is illustrated in Moyock, North Carolina, for refinement of hydro-conditioning by combines pre-existing bare earth DEMs with spatial analysis of LiDAR point clouds in segmented and buffered ditch and canal networks. The methodology produces improved maps of fine-scale drainage, reduced omission of areal flood inundation, and subwatershed delineations that typify heavily ditched and canalled drainage areas. These preliminary results illustrate the capability of the technique to improve the representation of ditches in DEMs as well as subsequent flow and inundation modeling that could spur further research on low-relief coastal LiDAR applications.

  10. Darüşşifas Where Music Threapy was Practiced During Anatolian Seljuks and Ottomans

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    Gülşen Erdal

    2013-03-01

    Full Text Available AbstractMusic therapy, one of the oldest treatment methods known, dates back to thousands of years. Turks’ using music therapy practices in hospitals -Ottoman and Seljuk hospitals- built with appropriate acoustic in the treatment of mental disorders, utilizing the books which included the researches done by scientists such as İbni Sina, Razî, Farabî, Hasan Şuurî and in Gevrekzade Hasan Efendi in music therapy and improving music therapy practices exemplarily in the period of Ottomans and Seljukians is assessed as the first serious music therapy practices. Darüşşifa is one of the names given to medical and educational establishments which give people health service depending on practice and observation and treated patients in Turkish and Islamic world. Turks started various reconstruction activities following their settlement in Anatolia. Within a short period, they built several types of artifacts such as; caravansaries, madrasahs, mosques, darüşşifas. In Seljukian and Ottoman darüşşifas, medical subjects were taught according to researches and scientific principals, and surgeons were educated at medical madrasahs as well. Medical health care service was provided in those places. In this study, of darüşşifas where music therapy was practised the ones surviving today and having importance have been analyzed so as to emphasize how curative power of art history and music was used by Turkish people centuries ago. From this point of view, Kayseri Gevher Nesibe Tıp Medresesi (Medical madrasah (1206, Divriği Ulu Camii ve Darüşşifası (Mosque and Hospital (1228, Amasya Darüşşifası (1309, Fatih Darüşşifası (1470 Edirne Sultan II. Bayezid Darüşşifası (1488, Süleymaniye Tıp Medresesi and Şifahanesi (Medical Madrasah and Hospital (1556 have been examined in this study as the featured ones among the institutions where music therapy was practised.ÖzetMüziğin insanlar üzerinde bıraktığı psikolojik ve fiziksel etki

  11. Rapid, high-resolution measurement of leaf area and leaf orientation using terrestrial LiDAR scanning data

    International Nuclear Information System (INIS)

    Bailey, Brian N; Mahaffee, Walter F

    2017-01-01

    The rapid evolution of high performance computing technology has allowed for the development of extremely detailed models of the urban and natural environment. Although models can now represent sub-meter-scale variability in environmental geometry, model users are often unable to specify the geometry of real domains at this scale given available measurements. An emerging technology in this field has been the use of terrestrial LiDAR scanning data to rapidly measure the three-dimensional geometry of trees, such as the distribution of leaf area. However, current LiDAR methods suffer from the limitation that they require detailed knowledge of leaf orientation in order to translate projected leaf area into actual leaf area. Common methods for measuring leaf orientation are often tedious or inaccurate, which places constraints on the LiDAR measurement technique. This work presents a new method to simultaneously measure leaf orientation and leaf area within an arbitrarily defined volume using terrestrial LiDAR data. The novelty of the method lies in the direct measurement of the fraction of projected leaf area G from the LiDAR data which is required to relate projected leaf area to total leaf area, and in the new way in which radiation transfer theory is used to calculate leaf area from the LiDAR data. The method was validated by comparing LiDAR-measured leaf area to (1) ‘synthetic’ or computer-generated LiDAR data where the exact area was known, and (2) direct measurements of leaf area in the field using destructive sampling. Overall, agreement between the LiDAR and reference measurements was very good, showing a normalized root-mean-squared-error of about 15% for the synthetic tests, and 13% in the field. (paper)

  12. Dos visiones del espacio marino como modernidad. Entre la poesía de Rubén Darío y la pintura de Joaquín Sorolla

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    Acereda, Alberto

    2003-06-01

    Full Text Available The representation of the marine space in Hispanic fin-de-siècle allows us to establish some comments to carry out a new reading of the difficult concept of modernity. The present article studies two visions of the marine space as modernity. On the one hand, the paintings by the Spaniard Joaquin Sorolla present the marine space as a locus amoenus, and as a place for enjoyment where art becomes an economic object. On the other hand, the Nicaraguan poet Rubén Darío intented to create an art opposed to materialism, and he gave us a vision of the ocean linked to a metaphysical meditation of existential tones. Darío was familiar with Joaquin Sorolla's paintings and he even wrote short essays on them. This particular aspect allows us to prove in a clearer way the differences in their visions about modernity and art.La representación del espacio marino en el fin de siglo hispánico permite establecer algunas consideraciones que favorecen una nueva lectura sobre el difícil concepto de modernidad. El presente artículo estudia dos visiones del espacio marino como modernidad. Por un lado, la pintura del español Joaquín Sorolla percibe el espacio marino como locus amoenus y marco de diversión por el que el arte se convierte en un objeto económico. Por otro lado, el poeta nicaragüense Ruben Darío aspiró a un arte opuesto al materialismo y planteó una visión del mar ligada a una reflexión metafísica de signo existencial. Darío conoció la pintura de Joaquín Sorolla y hasta en algún caso realizó breves comentarios de ella. Esta particularidad nos permite probar de manera más clara las diferencias en sus visiones sobre la modernidad y el arte.

  13. Multi-component wind measurements of wind turbine wakes performed with three LiDARs

    Science.gov (United States)

    Iungo, G. V.; Wu, Y.-T.; Porté-Agel, F.

    2012-04-01

    Field measurements of the wake flow produced from the interaction between atmospheric boundary layer and a wind turbine are performed with three wind LiDARs. The tested wind turbine is a 2 MW Enercon E-70 located in Collonges, Switzerland. First, accuracy of mean values and frequency resolution of the wind measurements are surveyed as a function of the number of laser rays emitted for each measurement. Indeed, measurements performed with one single ray allow maximizing sampling frequency, thus characterizing wake turbulence. On the other hand, if the number of emitted rays is increased accuracy of mean wind is increased due to the longer sampling period. Subsequently, two-dimensional measurements with a single LiDAR are carried out over vertical sections of the wind turbine wake and mean wake flow is obtained by averaging 2D measurements consecutively performed. The high spatial resolution of the used LiDAR allows characterizing in details velocity defect present in the central part of the wake and its downstream recovery. Single LiDAR measurements are also performed by staring the laser beam at fixed directions for a sampling period of about ten minutes and maximizing the sampling frequency in order to characterize wake turbulence. From these tests wind fluctuation peaks are detected in the wind turbine wake at blade top-tip height for different downstream locations. The magnitude of these turbulence peaks is generally reduced by moving downstream. This increased turbulence level at blade top-tip height observed for a real wind turbine has been already detected from previous wind tunnel tests and Large Eddy simulations, thus confirming the presence of a source of dangerous fatigue loads for following wind turbines within a wind farm. Furthermore, the proper characterization of wind fluctuations through LiDAR measurements is proved by the detection of the inertial subrange from spectral analysis of these velocity signals. Finally, simultaneous measurements with two

  14. Primera industria textil de algodón en Colombia, 1884-1905. Compañía Industrial de Samacá ''Fábrica de hilados y tejidos de algodón''

    OpenAIRE

    Pineda de Cuadros, Nubia Elena

    2009-01-01

    Es texto interpreta la fundación de la Compañía Industrial de Samacá ''Fábrica de Hilados y Tejidos de Algodón'' en el municipio de Samacá (Boyacá- Colombia). El artículo rinde cuenta del proceso fundacional, considerado uno de los primeros antecedentes de la industria textil contemporánea en Colombia; analiza la dinámica interna de la empresa desde una perspectiva jurídica y administrativa, así como ofrece un enfoque sobre las posibles causales de su cierre. Finalmente, responde a la pregunt...

  15. Asociación del tejido adiposo epicárdico con la fibrilación auricular y su pronóstico posterior a la ablación de venas pulmonares

    Directory of Open Access Journals (Sweden)

    Viviana Quintero-Yepes

    2017-05-01

    Conclusiones: el aumento del tejido adiposo epicárdico se relaciona de manera independiente con el sobrepeso y la obesidad, así como con la severidad y el pronóstico de la fibrilación auricular. Deben hacerse estudios prospectivos de cohortes en los que se evalúe y establezcan valores de corte normales para nuestra población, al igual que seguimiento a largo plazo de la evolución posterior a ablación de venas pulmonares y a intervenciones como disminución de peso.

  16. Efecto del uso combinado de ácido hialurónico, plasma rico en plaquetas y células madre adultas derivadas de tejido adiposo en la reparación de defectos osteocondrales

    OpenAIRE

    Cervero Suárez, Francisco Javier

    2013-01-01

    El cartílago articular es un tejido que permite la trasmisión de fuerzas y el movimiento, y para ello presenta unas características entre las que destacan la baja celularidad y la ausencia de aporte sanguíneo, de terminaciones nerviosas y de drenaje linfático. Sin embargo, estas características son a la vez una limitación crucial para la reparación de los daños. En consecuencia, se han ido desarrollando en los últimos años diferentes terapias que tratan de mejorar la baja capacidad de regene...

  17. Efecto del uso combinado de ácido hialurónico, plasma rico en plaquetas y células madre adultas derivadas de tejido adiposo en la reparación de defectos osteocondrales

    OpenAIRE

    Cervero Suárez, Francisco Javier

    2016-01-01

    El cartílago articular es un tejido que permite la trasmisión de fuerzas y el movimiento, y para ello presenta unas características entre las que destacan la baja celularidad y la ausencia de aporte sanguíneo, de terminaciones nerviosas y de drenaje linfático. Sin embargo, estas características son a la vez una limitación crucial para la reparación de los daños. En consecuencia, se han ido desarrollando en los últimos años diferentes terapias que tratan de mejorar la baja capacidad de regene...

  18. Efecto comparativo de una dieta rica en grasa monoinsaturada sobre la disfunción del tejido adiposo en pacientes con síndrome metabólico en estado posprandial

    OpenAIRE

    Meneses Álvarez, María Eugenia

    2013-01-01

    Introducción: Una de las características más comunes de los pacientes con síndrome metabólico (SMet) es la obesidad abdominal. El aumento y expansión que experimenta el tejido adiposo (TA) en personas obesas provoca una serie de alteraciones fisiopatológicas entre las que destaca la disfunción del TA. La exposición a un balance positivo de energía durante un largo periodo de tiempo produce fenómenos de hiperplasia (incrementa el número de adipocitos) e hipertrofia (incrementa e...

  19. Costa Brava, los retos urbanísticos del turismo de masas: la huella de la ciudad jardín y algunos principios racionalistas en el tejido turístico de masas

    OpenAIRE

    Ramos Caravaca, Carolina

    2013-01-01

    Director: Joaquin Sabaté Bel El turismo de masas plantea un nuevo reto urbanístico a mitad del siglo XX. La Costa Brava adopta el modelo de ciudad jardín, utilizado durante el turismo de élite, e introduce aportaciones del Movimiento Moderno. La costa es un territorio de experimentación donde la ciudad jardín y el urbanismo moderno convergen. Pese a las dificultades de los primeros años de ensayo, los nuevos tejidos muestran parámetros propios, y la relación de los edificios con e...

  20. Composición de Ácidos Grasos (MUFA y CLA) en Tejido Muscular de Bovino Relacionado con la Presencia del Polimorfismo g.878TC en el Gen SCD

    OpenAIRE

    Inostroza, K; Larama, G; Sepúlveda, N

    2012-01-01

    El tejido muscular de muchos animales domésticos es fuente de proteínas, grasa y minerales para los seres humanos y está compuesto por una serie de estructuras que le otorgan propiedades nutricionales y bioquímicas. En los ultimos años se ha identificado un polimorfismo de único nucleótido (SNP) en el gen SCD (g.878TC), que influye sobre la composición de ácidos grasos en los bovinos. El objetivo de este estudio fue determinar la presencia del SNP g.878TC en músculo Longissimus dorsi de bovin...

  1. Injertos de tejido adiposo: variables que influyen en la viabilidad del adipocito y de las células madre mesenquimales Fat grafting: variables that influence the viability of the adipocyte and mesenchimal stem cells

    Directory of Open Access Journals (Sweden)

    J. Benito Ruiz

    2011-12-01

    Full Text Available Si bien los injertos de tejido adiposo se han venido utilizando durante décadas a lo largo del siglo pasado, la técnica se venía considerando como poco útil dado que el injerto tendía a la reabsorción. Fue Coleman quien introdujo un sistema de obtención-procesamiento-infiltración atraumático que aumentó el porcentaje de supervivencia del injerto y la obtención de resultados positivos similares en su aplicación en todo el mundo. Aún así, la publicación de resultados dispares en la literatura respecto a la supervivencia del injerto, con diferentes porcentajes de reabsorción y el descubrimiento de las células madre en el tejido adiposo, han llevado a la realización de numerosos trabajos de investigación encaminados a comprender la biología del injerto de tejido adiposo, a estudiar el papel de las células madre en este proceso y la influencia que sobre la viabilidad celular tienen los distintos pasos a los que los cirujanos plásticos sometemos al tejido adiposo para su trasplante. Hemos hecho una revisión de la literatura científica al respecto para reunir la información disponible sobre estas controversias.Though adipose tissue grafts have been used for decades in last century, the technique has been considered as slightly usefull provided that the graft was tending to reabsorption. It was Coleman who introduced a system of atraumatic harvesting-processing-infiltration that increased the percentage of survival of the graft obtaining positive similar results in its application all over the world. Nonetheless, publication of unlike results in the literature regarding survival of the graft with different percentages of reabsorption and the discovery of stem cells in the adipose tissue, have led to the accomplishment of numerous research works directed to understanding the biology of the fat graft, the role of the stem cells in this process and the influence that the different steps for transplantation have on the cellular

  2. Variación estacional de lípidos en varios tejidos del cambute Strombus gigas (Mesogastropoda: Strombidae, en Quintana Roo, México

    Directory of Open Access Journals (Sweden)

    Nancy Brito Manzano

    1998-09-01

    Full Text Available Se determinó la variación mensual de lípidos en varios tejidos del cambute Strombus gigas (L., en Banco Chinchorro, Quintana Roo, México durante un año. La longitud de la heliconcha fue 209 ± 1 mm, la del cuerpo 137 ± 1 mm, la de la espira 100 ± 1 mm y el peso húmedo total 1 826 ± 7 g. La media del contenido de lípidos en la gónada-glándula digestiva fue 4.27 g% (machos 4.01 g% y hembras 4.50 g%. El contenido de lípidos en gónada-glándula digestiva mostró diferencias sexuales significativas (p Strombus gigas samples were collected in Banco Chinchorro, Quintana Roo, Mexico (18°47'-18°23' N; 87°14' W. Shell, body and spire lenght were measured. Fat content of gonad, digestive gland and meat of male and female conchs, was analyzed by the standard and microsoxhlet methods on a monthly basis for a year. Mean lenght for shell, body and spire were 209 ± 1 mm, 137 ±1 mm and 100 ± 1 mm, respectively. Total wet weigth was 1 826 ± 7 g. Fat content in gonad-digestive gland was 1.27-9.33 g% with a mean of 4.27 g% and in meat 0.41-5.03 g% with a mean of 2.15 g%. Fat content in female gonad-digestive gland was 1.27 g% at 8.57 g% with a mean of 4.50 g%; in male: 1.87 g% at 9.33 g% with a mean of 4.01 g%. Sexes differed (t student P < 0.05. Mean fat content in meat was 2.15 g%, (males 1.97 g%, females 2.3 g%. There was not significant sexual difference for meat fat content. There was a difference between gonad-digestive gland and meat (t student P < 0.05. However, from February to September meat lipid content exceeds the percentage recommended for human consumption by the FAO.

  3. La Corona Española y sus Leyes

    Directory of Open Access Journals (Sweden)

    Jaime Herrera Pontón

    1995-04-01

    Full Text Available

    Bogotá, Mayo 27 de 1994

    Señor Académico
    Zoilo Cuéllar Montoya
    Secretario
    Academia Nacional de Medicina

    E. S. D.

    Muy estimado doctor Cuéllar:

    En la última reunión de la Academia, el académico De Zubiría, mencionó que el consumo de coca ya estaba penalizado desde la época de la Colonia. Me permito enviarle una copia de lo referente a la coca que se encuentra en las Leyes dictadas por la Corona Española en relación con este tema. Está tomado de la tercera edición de la recopilación que se hizo de dichas leyes en el año de 1774, por orden del Rey don Carlos Ir, del 7 de febrero de dicho año.

    Como es una fiel copia del original, he respetado la ortografía usada en él.

    Atentamente,
    Jaime Herrera Pontón

    Recopilación de leyes de los reynos de las Indias
    Año de 1774, tercera edición, Madrid.

    TÍTULO CATORCE
    Del servicio en Coca y Añir

    – Ley primera. Que los Indios, que trabajan, en la Coca sean bien tratados, y no usen de ella en supersticiones y hechicerías.

    D. Felipe Segundo en Madrid a 18 de Octubre de 1569

    Somos informados que de la costumbre de los Indios del Perú tienen en el uso de la Coca, y su
    grangería, se siguen grandes inconvenientes, por ser mucha parte para sus idolatrías, ceremonias, y hechicerías, y fingen, que trayéndola en la boca les da más fuerza y vigor para el trabajo, que según afirman los experimentados es ilusión de el Demonio, y en su beneficio perecen infinidad de Indios, que por ser cálida, y enferma la parte donde se cría, e ir a ella de tierra fría, de que mueren muchos, y otros salen tan enfermos, y débiles, que no se pueden reparar.

    Y aunque nos fue suplicado, que la mandássemos, porque desamas no quitar a los Indios este genero de alivio para el trabajo, aunque solo consista en la imaginación: Ordenamos a los Virreyes, que probean como los Indios, que se emplean en el

  4. La crisis estructural del capitalismo y sus repercusiones

    Directory of Open Access Journals (Sweden)

    Francisco Luiz Corsi

    2010-01-01

    Full Text Available El presente artículo analiza la crisis estructural del capitalismo provocada por el estallido de la burbuja especulativa inmobiliaria en EEUU en 2007 y sus repercusiones. El presente fenómeno es el desenlace de una serie de procesos desencadenados en respuesta a la crisis de sobreacumulación del capital de los años setenta que generó, por un lado, las condiciones para el dominio del capital financiero y, por otro lado, una nueva frontera de acumulación del capital en el Este asiático, sobre todo en China. La crisis cuestiona la centralidad de la economía norteamericana, lo que no significa necesariamente el desplazamiento del centro hegemónico del capitalismo hacia Asia. Lo que aquí defendemos, es la idea de que nos dirigimos hacia un mundo multipolar. This article analyzes the structural crisis of capitalism that began when the speculative home mortgage bubble burst in the United States in 2007, and the repercussions of that phenomenon. The current crisis is the outcome of a series of processes unleashed as a result of the crisis of overaccumulation of capital in the 1970s, which generated, on the one hand, the conditions for financial capital’s dominance and, on the other, a new frontier for the accumulation of capital in East Asia, especially in China. The crisis calls into question the centrality of the North American economy, but that does not necessarily mean the shift of capitalism’s hegemonic center to Asia. Here we will argue that we are headed toward a multipolar world.

  5. Maltrato infantil y sus consecuencias a largo plazo

    Directory of Open Access Journals (Sweden)

    Laura Carolina Alarcón Forero

    2010-01-01

    Full Text Available La violencia intrafamiliar constituye una de las formas más frecuentes de violencia encontradas tanto a nivel nacional como internacional y dentro de estas el maltrato infantil presenta cifras alarmantes, y es el objeto de nuestra revisión. Los efectos de este problema repercuten notablemente en aquellos que sobreviven, ya que las consecuencias a largo plazo del maltrato infantil son más perjudiciales para lasvíctimas y sus familias, y más costoso para la sociedad, que las lesiones agudas inmediatas que puedan producir. Las consecuencias a largo plazo para estos niños varían desde efectos nocivos en su desarrollo hasta trastornos psicológicos, psiquiátricos y orgánicos. Es importante resaltar que aún con muy buenas intervenciones no todas tienen el éxito esperado si no se hacen de manera correcta. Esindispensable contar con estrategias de prevención que incluyan personal bien entrenado, una supervisión adecuada, los recursos necesarios, y un tiempo mínimo óptimo para enfrentar el problema y obtener los mejores resultados. ______________________________________________________________________Domestic violence is one of the most common forms of violence found both domestically and internationally. Within these, child abuse has alarming figures. This is the subject of this review. The effects of this problem significantly impact on those who survive; their long-term consequences are most severe and expensive for victimized child and his/her family than associated primary physical injuries. Thelong-term consequences for these children range from adverse effects on its psycholigical development to psychological, psychiatric organic disoders. It is important to note that good speeches are not enough to achieve success if any intervention are not done correctly. All prevention strategies include well-trained staff, appropriate supervision, resources, and a optimal time for addressing this problem to get the best results.

  6. Proteja a sus seres queridos de las caídas

    Centers for Disease Control (CDC) Podcasts

    Este podcast, que forma parte de la iniciativa Proteja a sus seres queridos, aborda las medidas que pueden tomar los padres de familia para ayudar a proteger a sus niños de las caídas, una de las principales causas de lesiones infantiles.

  7. La Observación Sistemática de Vecindarios: El caso de Chile y sus perspectivas para Trabajo Social

    Science.gov (United States)

    Sanhueza, Guillermo E.; Delva, Jorge; Andrade, Fernando H.; Grogan-Kaylor, Andrew; Bares, Cristina; Castillo, Marcela

    2012-01-01

    El estudio acerca de las características de los vecindarios y sus efectos sobre las personas ha llegado a ser un área de creciente atención por parte de investigadores de diversas disciplinas en países desarrollados. Aunque actualmente existen diversas metodologías para estudiar efectos del vecindario, una de las más utilizadas es la Observación Sistemática de Vecindarios –Systematic Social Observation SSO, en inglés—porque permite recolectar información acerca de diversas características del entorno físico, social, ambiental y económico de los vecindarios donde se aplica. El objetivo de este artículo es (i) dar a conocer sumariamente algunas investigaciones influyentes sobre efectos del vecindario en Estados Unidos, ii) describir cómo se diseñó e implementó la Observación Sistemática de Vecindarios en la ciudad de Santiago de Chile, iii) señalar algunos facilitadores y obstaculizadores de la implementación del proyecto y, finalmente iv) enunciar posibles contribuciones y limitaciones que esta metodología ofrecería al trabajo social en Chile. PMID:24791060

  8. Quantifying spatial distribution of snow depth errors from LiDAR using Random Forests

    Science.gov (United States)

    Tinkham, W.; Smith, A. M.; Marshall, H.; Link, T. E.; Falkowski, M. J.; Winstral, A. H.

    2013-12-01

    There is increasing need to characterize the distribution of snow in complex terrain using remote sensing approaches, especially in isolated mountainous regions that are often water-limited, the principal source of terrestrial freshwater, and sensitive to climatic shifts and variations. We apply intensive topographic surveys, multi-temporal LiDAR, and Random Forest modeling to quantify snow volume and characterize associated errors across seven land cover types in a semi-arid mountainous catchment at a 1 and 4 m spatial resolution. The LiDAR-based estimates of both snow-off surface topology and snow depths were validated against ground-based measurements across the catchment. Comparison of LiDAR-derived snow depths to manual snow depth surveys revealed that LiDAR based estimates were more accurate in areas of low lying vegetation such as shrubs (RMSE = 0.14 m) as compared to areas consisting of tree cover (RMSE = 0.20-0.35 m). The highest errors were found along the edge of conifer forests (RMSE = 0.35 m), however a second conifer transect outside the catchment had much lower errors (RMSE = 0.21 m). This difference is attributed to the wind exposure of the first site that led to highly variable snow depths at short spatial distances. The Random Forest modeled errors deviated from the field measured errors with a RMSE of 0.09-0.34 m across the different cover types. Results show that snow drifts, which are important for maintaining spring and summer stream flows and establishing and sustaining water-limited plant species, contained 30 × 5-6% of the snow volume while only occupying 10% of the catchment area similar to findings by prior physically-based modeling approaches. This study demonstrates the potential utility of combining multi-temporal LiDAR with Random Forest modeling to quantify the distribution of snow depth with a reasonable degree of accuracy. Future work could explore the utility of Terrestrial LiDAR Scanners to produce validation of snow-on surface

  9. Modelling vertical error in LiDAR-derived digital elevation models

    Science.gov (United States)

    Aguilar, Fernando J.; Mills, Jon P.; Delgado, Jorge; Aguilar, Manuel A.; Negreiros, J. G.; Pérez, José L.

    2010-01-01

    A hybrid theoretical-empirical model has been developed for modelling the error in LiDAR-derived digital elevation models (DEMs) of non-open terrain. The theoretical component seeks to model the propagation of the sample data error (SDE), i.e. the error from light detection and ranging (LiDAR) data capture of ground sampled points in open terrain, towards interpolated points. The interpolation methods used for infilling gaps may produce a non-negligible error that is referred to as gridding error. In this case, interpolation is performed using an inverse distance weighting (IDW) method with the local support of the five closest neighbours, although it would be possible to utilize other interpolation methods. The empirical component refers to what is known as "information loss". This is the error purely due to modelling the continuous terrain surface from only a discrete number of points plus the error arising from the interpolation process. The SDE must be previously calculated from a suitable number of check points located in open terrain and assumes that the LiDAR point density was sufficiently high to neglect the gridding error. For model calibration, data for 29 study sites, 200×200 m in size, belonging to different areas around Almeria province, south-east Spain, were acquired by means of stereo photogrammetric methods. The developed methodology was validated against two different LiDAR datasets. The first dataset used was an Ordnance Survey (OS) LiDAR survey carried out over a region of Bristol in the UK. The second dataset was an area located at Gador mountain range, south of Almería province, Spain. Both terrain slope and sampling density were incorporated in the empirical component through the calibration phase, resulting in a very good agreement between predicted and observed data (R2 = 0.9856 ; p reasonably good fit to the predicted errors. Even better results were achieved in the more rugged morphology of the Gador mountain range dataset. The findings

  10. Influencia de las mezclas de poliglucósido con tensioactivo aniónico en el lavado de tejido de poliéster

    OpenAIRE

    Carrión Fité, Francisco Javier

    2006-01-01

    El notable desarrollo de los tensioactivosno iónicos como componentes dominantes en las formulaciones detergentes requiere la comprensión de sus prestaciones durante el lavado, no solamente como productos separados sino también como mezclas binarias con tensioactivo aniónico. Con objeto de obtener buenos niveles de biodegradabilidad y toxicidad han aparecido en el mercado los alquil poliglucósidos (APGs). Estos tensioactivos no iónicos, obtenidos de sustancias naturales, son 100% biodegradabl...

  11. La creación del mundo supralunar según Abraham Ibn Ezra: un estudio comparativo de sus dos comentarios a Génesis 1,14

    Directory of Open Access Journals (Sweden)

    Sela, Shlomo

    2003-06-01

    Full Text Available This article aims at elucidating Abraham Ibn Ezra's (ca. 1089 - ca. 1167 opinion about the creation of the supra-lunar world. A major and striking feature of Ibn Ezra's approach is that he did not find it convenient to address this issue, intimately related to the nature of the celestial bodies, in his astronomical or astrological treatises, but rather in his biblical commentaries. Therefore, we propose to concentrate our efforts on the meticulous study of the two commentaries which Ibn Ezra wrote on Genesis 1,14. As this verse focuses on the account of the creation of the heavenly bodies, we have assumed that the elusive Ibn Ezra could not have avoided revealing his view, or, at least, that we should have left some significant hints from which we may uncover his genuine opinion about the creation of the supra-lunar world.

    El propósito de este artículo es averiguar la opinión de Abraham Ibn Ezra (ca. 1089 - ca. 1167 sobre lo relacionado con la creación del mundo supralunar. Una característica fundamental dei modus operandi de Ibn Ezra es que, si buscamos información acerca de su opinión sobre la creación del mundo, tanto sublunar como supralunar, no la hallaremos en sus tratados científicos astronómicos o astrológicos, sino precisamente en sus comentarios bíblicos. Por lo tanto, la metodología más adecuada consistirá en concentrar nuestros esfuerzos en el estudio meticuloso de sus dos comentarios a Génesis 1,14. Dado que este verso bíblico tiene como objetivo principal el relato y la descripción de la creación de las luminarias, pensamos que en ambos comentarios Ibn Ezra no pudo haber eludido dar su verdadera opinión -o al menos dejar alguna pista significativa- sobre la creación del mundo supralunar.

  12. 2007 Oregon Department of Geology and Mineral Industries (DoGAMI) LiDAR: Northwest Oregon and Portland Metro Area

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Watershed Sciences, Inc. collected Light Detection and Ranging (LiDAR) data for the Oregon Department of Geology and Mineral Industries (DoGAMI) and the Oregon...

  13. IsoDAR@KamLAND: A Conceptual Design Report for the Technical Facility

    CERN Document Server

    Abs, M; Alonso, J R; Axani, S; Barletta, W A; Barlow, R; Bartoszek, L; Bungau, A; Calabretta, L; Calanna, A; Campo, D; Castro, G; Celona, L; Collin, G H; Conrad, J M; Gammino, S; Johnson, R; Karagiorgi, G; Kayser, S; Kleeven, W; Kolano, A; Labrecque, F; Loinaz, W A; Minervini, J; Moulai, M H; Okuno, H; Owen, H; Papavassiliou, V; Shaevitz, M H; Shimizu, I; Shokair, T M; Sorensen, K F; Spitz, J; Toups, M; Vagins, M; Van Bibber, K; Wascko, M O; Winklehner, D; Winslow, L A; Yang, J J

    2015-01-01

    This conceptual design report describes the technical facility for the IsoDAR electron-antineutrino source at KamLAND. The IsoDAR source will allow an impressive program of neutrino oscillation and electroweak physics to be performed at KamLAND. This report provides information on the physics case, the conceptual design for the subsystems, alternative designs considered, specifics of installation at KamLAND, and identified needs for future development. We discuss the risks we have identified and our approach to mitigating those risks with this design. A substantial portion of the conceptual design is based on three years of experimental efforts and on industry experience. This report also includes information on the conventional facilities.

  14. Wind Predictions Upstream Wind Turbines from a LiDAR Database

    Directory of Open Access Journals (Sweden)

    Soledad Le Clainche

    2018-03-01

    Full Text Available This article presents a new method to predict the wind velocity upstream a horizontal axis wind turbine from a set of light detection and ranging (LiDAR measurements. The method uses higher order dynamic mode decomposition (HODMD to construct a reduced order model (ROM that can be extrapolated in space. LiDAR measurements have been carried out upstream a wind turbine at six different planes perpendicular to the wind turbine axis. This new HODMD-based ROM predicts with high accuracy the wind velocity during a timespan of 24 h in a plane of measurements that is more than 225 m far away from the wind turbine. Moreover, the technique introduced is general and obtained with an almost negligible computational cost. This fact makes it possible to extend its application to both vertical axis wind turbines and real-time operation.

  15. Automated Extraction of 3D Trees from Mobile LiDAR Point Clouds

    Directory of Open Access Journals (Sweden)

    Y. Yu

    2014-06-01

    Full Text Available This paper presents an automated algorithm for extracting 3D trees directly from 3D mobile light detection and ranging (LiDAR data. To reduce both computational and spatial complexities, ground points are first filtered out from a raw 3D point cloud via blockbased elevation filtering. Off-ground points are then grouped into clusters representing individual objects through Euclidean distance clustering and voxel-based normalized cut segmentation. Finally, a model-driven method is proposed to achieve the extraction of 3D trees based on a pairwise 3D shape descriptor. The proposed algorithm is tested using a set of mobile LiDAR point clouds acquired by a RIEGL VMX-450 system. The results demonstrate the feasibility and effectiveness of the proposed algorithm.

  16. Comparative study of building footprint estimation methods from LiDAR point clouds

    Science.gov (United States)

    Rozas, E.; Rivera, F. F.; Cabaleiro, J. C.; Pena, T. F.; Vilariño, D. L.

    2017-10-01

    Building area calculation from LiDAR points is still a difficult task with no clear solution. Their different characteristics, such as shape or size, have made the process too complex to automate. However, several algorithms and techniques have been used in order to obtain an approximated hull. 3D-building reconstruction or urban planning are examples of important applications that benefit of accurate building footprint estimations. In this paper, we have carried out a study of accuracy in the estimation of the footprint of buildings from LiDAR points. The analysis focuses on the processing steps following the object recognition and classification, assuming that labeling of building points have been previously performed. Then, we perform an in-depth analysis of the influence of the point density over the accuracy of the building area estimation. In addition, a set of buildings with different size and shape were manually classified, in such a way that they can be used as benchmark.

  17. High resolution, topobathymetric LiDAR coastal zone characterization in Denmark

    DEFF Research Database (Denmark)

    Steinbacher, Frank; Baran, Ramona; Andersen, Mikkel S.

    2016-01-01

    Coastal and tidal environments are valuable ecosystems, which, however, are under pressure in many areas around the world due to globalization and/or climate change. Detailed mapping of these environments is required in order to manage the coastal zone in a sustainable way. However, historically...... locations with different environmental settings. We demonstrate the potential of using airborne topobathymetric LiDAR for seamless mapping of land-water transition zones in challenging coastal environments, e.g. in an environment with high water column turbidity and continuously varying water levels due...... these transition zones between land and water are difficult or even impossible to map and investigate in high spatial resolution due to the challenging environmental conditions. The new generation of airborne topobathymetric light detection and ranging (LiDAR) potentially enables full-coverage and high...

  18. Remote measurement of surface roughness, surface reflectance, and body reflectance with LiDAR.

    Science.gov (United States)

    Li, Xiaolu; Liang, Yu

    2015-10-20

    Light detection and ranging (LiDAR) intensity data are attracting increasing attention because of the great potential for use of such data in a variety of remote sensing applications. To fully investigate the data potential for target classification and identification, we carried out a series of experiments with typical urban building materials and employed our reconstructed built-in-lab LiDAR system. Received intensity data were analyzed on the basis of the derived bidirectional reflectance distribution function (BRDF) model and the established integration method. With an improved fitting algorithm, parameters involved in the BRDF model can be obtained to depict the surface characteristics. One of these parameters related to surface roughness was converted to a most used roughness parameter, the arithmetical mean deviation of the roughness profile (Ra), which can be used to validate the feasibility of the BRDF model in surface characterizations and performance evaluations.

  19. La neorruralidad y sus significados. El caso de Navarra

    Directory of Open Access Journals (Sweden)

    Rivera, María Jesús

    2009-08-01

    que esta apuesta residencial tuvo para sus protagonistas.

  20. True Orthophoto Generation from Aerial Frame Images and LiDAR Data: An Update

    Directory of Open Access Journals (Sweden)

    Hamid Gharibi

    2018-04-01

    Full Text Available Image spectral and Light Detection and Ranging (LiDAR positional information can be related through the orthophoto generation process. Orthophotos have a uniform scale and represent all objects in their correct planimetric locations. However, orthophotos generated using conventional methods suffer from an artifact known as the double-mapping effect that occurs in areas occluded by tall objects. The double-mapping problem can be resolved through the commonly known true orthophoto generation procedure, in which an occlusion detection process is incorporated. This paper presents a review of occlusion detection methods, from which three techniques are compared and analyzed using experimental results. The paper also describes a framework for true orthophoto production based on an angle-based occlusion detection method. To improve the performance of the angle-based technique, two modifications to this method are introduced. These modifications, which aim at resolving false visibilities reported within the angle-based occlusion detection process, are referred to as occlusion extension and radial section overlap. A weighted averaging approach is also proposed to mitigate the seamline effect and spectral dissimilarity that may appear in true orthophoto mosaics. Moreover, true orthophotos generated from high-resolution aerial images and high-density LiDAR data using the updated version of angle-based methodology are illustrated for two urban study areas. To investigate the potential of image matching techniques in producing true orthophotos and point clouds, a comparison between the LiDAR-based and image-matching-based true orthophotos and digital surface models (DSMs for an urban study area is also presented in this paper. Among the investigated occlusion detection methods, the angle-based technique demonstrated a better performance in terms of output and running time. The LiDAR-based true orthophotos and DSMs showed higher qualities compared to their

  1. Intestinal Parasitic Infections in Bahir Dar and Risk Factors for Transmission

    OpenAIRE

    Erko, Berhanu; Medhin, Girmay; Birrie, Hailu

    1995-01-01

    A study of intestinal parasites and assessment of transmission factors were made in Bahir Dar town, northwestern Ethiopia. Out of 528 children examined by formolether concentration method over 95 % were found to harbour one or more intestinal parasites. Human behaviour and poor sanitary conditions appeared to be responsible for the transmission of geohelminths, faeco-orally transmitted amoebae and water-related schistosome parasites. Health education is suggested to play a vital role in the c...

  2. LiDAR Scan Matching Aided Inertial Navigation System in GNSS-Denied Environments

    OpenAIRE

    Tang, Jian; Chen, Yuwei; Niu, Xiaoji; Wang, Li; Chen, Liang; Liu, Jingbin; Shi, Chuang; Hyyppä, Juha

    2015-01-01

    A new scan that matches an aided Inertial Navigation System (INS) with a low-cost LiDAR is proposed as an alternative to GNSS-based navigation systems in GNSS-degraded or -denied environments such as indoor areas, dense forests, or urban canyons. In these areas, INS-based Dead Reckoning (DR) and Simultaneous Localization and Mapping (SLAM) technologies are normally used to estimate positions as separate tools. However, there are critical implementation problems with each standalone system. Th...

  3. Flying Under the LiDAR: Relating Forest Structure to Bat Community Diversity

    Science.gov (United States)

    Swanson, A. C.; Weishampel, J. F.

    2015-12-01

    Bats are important to many ecological processes such as pollination, insect (and by proxy, disease) control, and seed dispersal and can be used to monitor ecosystem health. However, they are facing unprecedented extinction risks from habitat degradation as well as pressures from pathogens (e.g., white-nose syndrome) and wind turbines. LiDAR allows ecologists to measure structural variables of forested landscapes with increased precision and accuracy at broader spatial scales than previously possible. This study used airborne LiDAR to classify forest habitat/canopy structure at the Ordway-Swisher Biological Station (OSBS) in north central Florida. LiDAR data were acquired by the NEON airborne observation platform in summer 2014. OSBS consists of open-canopy pine savannas, closed-canopy hardwood hammocks, and seasonally wet prairies. Multiple forest structural parameters (e.g., mean, maximum, and standard deviation of height returns) were derived from LiDAR point clouds using the USDA software program FUSION. K-means clustering was used to segregate each 5x5 m raster across the ~3765 ha OSBS area into six different clusters based on the derived canopy metrics. Cluster averages for maximum, mean, and standard deviation of return heights ranged from 0 to 19.4 m, 0 to 15.3 m, and 0 to 3.0 m, respectively. To determine the relationships among these landscape-canopy features and bat species diversity and abundances, AnaBat II bat detectors were deployed from May to September in 2015 stratified by these distinct clusters. Bat calls were recorded from sunset to sunrise during each sampling period. Species were identified using AnalookW. A statistical regression model selection approach was performed in order to evaluate how forest attributes such as understory clutter, open regions, open and closed canopy, etc. influence bat communities. This knowledge provides a deeper understanding of habitat-species interactions to better manage survival of these species.

  4. Quantitative study of tectonic geomorphology along Haiyuan fault based on airborne LiDAR

    Science.gov (United States)

    Chen, Tao; Zhang, Pei Zhen; Liu, Jing; Li, Chuan You; Ren, Zhi Kun; Hudnut, Kenneth W.

    2014-01-01

    High-precision and high-resolution topography are the fundamental data for active fault research. Light detection and ranging (LiDAR) presents a new approach to build detailed digital elevation models effectively. We take the Haiyuan fault in Gansu Province as an example of how LiDAR data may be used to improve the study of active faults and the risk assessment of related hazards. In the eastern segment of the Haiyuan fault, the Shaomayin site has been comprehensively investigated in previous research because of its exemplary tectonic topographic features. Based on unprecedented LiDAR data, the horizontal and vertical coseismic offsets at the Shaomayin site are described. The measured horizontal value is about 8.6 m, and the vertical value is about 0.8 m. Using prior dating ages sampled from the same location, we estimate the horizontal slip rate as 4.0 ± 1.0 mm/a with high confidence and define that the lower bound of the vertical slip rate is 0.4 ± 0.1 mm/a since the Holocene. LiDAR data can repeat the measurements of field work on quantifying offsets of tectonic landform features quite well. The offset landforms are visualized on an office computer workstation easily, and specialized software may be used to obtain displacement quantitatively. By combining precious chronological results, the fundamental link between fault activity and large earthquakes is better recognized, as well as the potential risk for future earthquake hazards.

  5. NASA Goddards LiDAR, Hyperspectral and Thermal (G-LiHT) Airborne Imager

    Science.gov (United States)

    Cook, Bruce D.; Corp, Lawrence A.; Nelson, Ross F.; Middleton, Elizabeth M.; Morton, Douglas C.; McCorkel, Joel T.; Masek, Jeffrey G.; Ranson, Kenneth J.; Ly, Vuong; Montesano, Paul M.

    2013-01-01

    The combination of LiDAR and optical remotely sensed data provides unique information about ecosystem structure and function. Here, we describe the development, validation and application of a new airborne system that integrates commercial off the shelf LiDAR hyperspectral and thermal components in a compact, lightweight and portable system. Goddard's LiDAR, Hyperspectral and Thermal (G-LiHT) airborne imager is a unique system that permits simultaneous measurements of vegetation structure, foliar spectra and surface temperatures at very high spatial resolution (approximately 1 m) on a wide range of airborne platforms. The complementary nature of LiDAR, optical and thermal data provide an analytical framework for the development of new algorithms to map plant species composition, plant functional types, biodiversity, biomass and carbon stocks, and plant growth. In addition, G-LiHT data enhance our ability to validate data from existing satellite missions and support NASA Earth Science research. G-LiHT's data processing and distribution system is designed to give scientists open access to both low- and high-level data products (http://gliht.gsfc.nasa.gov), which will stimulate the community development of synergistic data fusion algorithms. G-LiHT has been used to collect more than 6,500 km2 of data for NASA-sponsored studies across a broad range of ecoregions in the USA and Mexico. In this paper, we document G-LiHT design considerations, physical specifications, instrument performance and calibration and acquisition parameters. In addition, we describe the data processing system and higher-level data products that are freely distributed under NASA's Data and Information policy.

  6. Strategies for minimizing sample size for use in airborne LiDAR-based forest inventory

    Science.gov (United States)

    Junttila, Virpi; Finley, Andrew O.; Bradford, John B.; Kauranne, Tuomo

    2013-01-01

    Recently airborne Light Detection And Ranging (LiDAR) has emerged as a highly accurate remote sensing modality to be used in operational scale forest inventories. Inventories conducted with the help of LiDAR are most often model-based, i.e. they use variables derived from LiDAR point clouds as the predictive variables that are to be calibrated using field plots. The measurement of the necessary field plots is a time-consuming and statistically sensitive process. Because of this, current practice often presumes hundreds of plots to be collected. But since these plots are only used to calibrate regression models, it should be possible to minimize the number of plots needed by carefully selecting the plots to be measured. In the current study, we compare several systematic and random methods for calibration plot selection, with the specific aim that they be used in LiDAR based regression models for forest parameters, especially above-ground biomass. The primary criteria compared are based on both spatial representativity as well as on their coverage of the variability of the forest features measured. In the former case, it is important also to take into account spatial auto-correlation between the plots. The results indicate that choosing the plots in a way that ensures ample coverage of both spatial and feature space variability improves the performance of the corresponding models, and that adequate coverage of the variability in the feature space is the most important condition that should be met by the set of plots collected.

  7. Evaluation of Landslide Mapping Techniques and LiDAR-based Conditioning Factors

    Science.gov (United States)

    Mahalingam, R.; Olsen, M. J.

    2014-12-01

    Landslides are a major geohazard, which result in significant human, infrastructure, and economic losses. Landslide susceptibility mapping can help communities to plan and prepare for these damaging events. Mapping landslide susceptible locations using GIS and remote sensing techniques is gaining popularity in the past three decades. These efforts use a wide variety of procedures and consider a wide range of factors. Unfortunately, each study is often completed differently and independently of others. Further, the quality of the datasets used varies in terms of source, data collection, and generation, which can propagate errors or inconsistencies into the resulting output maps. Light detection and ranging (LiDAR) has proved to have higher accuracy in representing the continuous topographic surface, which can help minimize this uncertainty. The primary objectives of this paper are to investigate the applicability and performance of terrain factors in landslide hazard mapping, determine if LiDAR-derived datasets (slope, slope roughness, terrain roughness, stream power index and compound topographic index) can be used for predictive mapping without data representing other common landslide conditioning factors, and evaluate the differences in landslide susceptibility mapping using widely-used statistical approaches. The aforementioned factors were used to produce landslide susceptibility maps for a 140 km2 study area in northwest Oregon using six representative techniques: frequency ratio, weights of evidence, logistic regression, discriminant analysis, artificial neural network, and support vector machine. Most notably, the research showed an advantage in selecting fewer critical conditioning factors. The most reliable factors all could be derived from a single LiDAR DEM, reducing the need for laborious and costly data gathering. Most of the six techniques showed similar statistical results; however, ANN showed less accuracy for predictive mapping. Keywords : LiDAR

  8. LiDAR-based Prediction of Arthropod Abundance at the Southern Slopes of Mt. Kilimanjaro

    Science.gov (United States)

    Ziegler, Alice

    2017-04-01

    LiDAR (Light Detection And Ranging) is a remote sensing technology that offers high-resolution three-dimensional information about the covered area. These three-dimensional datasets were used in this work to derive structural parameters of the vegetation to predict the abundance of eight different arthropod assemblages with several models. For the model training of each arthropod assemblage, different versions (extent, filters) of the LiDAR datasets were provided and evaluated. Furthermore the importance of each of the LiDAR-derived structural parameters for each model was calculated. The best input dataset and structural parameters were used for the prediction of the abundance of arthropod assemblages. The analyses of the prediction results across seven different landuse types and the eight arthropod assemblages exposed, that for the arthropod assemblages, LiDAR-based predictions were in general best feasible for "Orthoptera" (average R2 (coefficient of determination) over all landuses: 0.14), even though the predictions for the other arthropod assemblages reached values of the same magnitude. It was also found that the landuse type "disturbed forest" showed the best results (average R2 over all assemblages: 0.20), whereas "home garden" was the least predictable (average R2 over all assemblages: 0.04). Differenciated by arthropod-landuse pairs, the results showed distinct differences and the R2 values diverged clearly. It was shown, that when model settings were optimized for only one arthropod taxa, values for R2 could reach values up to 0.55 ("Orthoptera" in "disturbed forest"). The analysis of the importance of each structural parameter for the prediction revealed that about one third of the 18 used parameters were always among the most important ones for the prediction of all assemblages. This strong ranking of parameters implied that focus for further research needs to be put on the selection of predictor variables.

  9. Use of LiDAR to Assist in Delineating Waters of the United States, Including Wetlands

    Science.gov (United States)

    2014-03-01

    components: a mounting platform, a laser and scanning mirror, an inertial measurement unit (IMU), a global positioning system (GPS) antenna and...including but not limited to TIFF, ASC , IMG, and KML files or compressed as a KMZ file. These files are quickly imported and viewed using GIS such as...sediment transport processes and hydraulics. Sedimentology 56:2024–2043. Hogg, A., and J. Holland. 2008. An evaluation of DEMs derived from LiDAR

  10. 3D turbulence measurements in inhomogeneous boundary layers with three wind LiDARs

    Science.gov (United States)

    Carbajo Fuertes, Fernando; Valerio Iungo, Giacomo; Porté-Agel, Fernando

    2014-05-01

    One of the most challenging tasks in atmospheric anemometry is obtaining reliable turbulence measurements of inhomogeneous boundary layers at heights or in locations where is not possible or convenient to install tower-based measurement systems, e.g. mountainous terrain, cities, wind farms, etc. Wind LiDARs are being extensively used for the measurement of averaged vertical wind profiles, but they can only successfully accomplish this task under the limiting conditions of flat terrain and horizontally homogeneous flow. Moreover, it has been shown that common scanning strategies introduce large systematic errors in turbulence measurements, regardless of the characteristics of the flow addressed. From the point of view of research, there exist a variety of techniques and scanning strategies to estimate different turbulence quantities but most of them rely in the combination of raw measurements with atmospheric models. Most of those models are only valid under the assumption of horizontal homogeneity. The limitations stated above can be overcome by a new triple LiDAR technique which uses simultaneous measurements from three intersecting Doppler wind LiDARs. It allows for the reconstruction of the three-dimensional velocity vector in time as well as local velocity gradients without the need of any turbulence model and with minimal assumptions [EGU2013-9670]. The triple LiDAR technique has been applied to the study of the flow over the campus of EPFL in Lausanne (Switzerland). The results show the potential of the technique for the measurement of turbulence in highly complex boundary layer flows. The technique is particularly useful for micrometeorology and wind engineering studies.

  11. Tejidos y cerámica de China en la gobernación de Tucumán y Buenos Aires, siglo XVIII. Apuntes sobre su circulación y consumo

    Directory of Open Access Journals (Sweden)

    Bonialian, Mariano

    2014-12-01

    Full Text Available This essay explores the Asian trade and consumption of textile and ceramics in the Government of Tucuman and Buenos Aires in the Eighteenth century. The Chinese textile «boom» that entered from Lima towards the southern space between 1700 and 1740 is analyzed. In second place, the entry of Chinese ceramics through Buenos Aires port in the second half of that century is explained. Finally two culture waves are recognized in the region: the first one tended to an «europeanization» of the Chinese objects; the second one involved the «orientalización» of the european objects.El ensayo explora el comercio asiático y el consumo de su tejido y cerámica en la gobernación de Tucumán y Buenos Aires en el siglo XVIII. Se analiza el «boom» de los tejidos chinos que ingresaron por Lima hacia el espacio austral entre 1700 y 1740. Por otra parte, se explica el ingreso de loza china por el puerto de Buenos Aires en la segunda mitad del siglo. Finalmente, se reconocen dos oleadas culturales en la región: una primera tendiente a la «europeización» de artículos chinos; y una segunda que implicó la «orientalización » de los productos europeos.

  12. Obtención y criopreservación de células madre del tejido graso mediante liposucción Collecting and criopreservation of stem cells obtained by liposuction from fat tissue

    Directory of Open Access Journals (Sweden)

    J. Planas Ribo

    2011-12-01

    Full Text Available Existen diferentes técnicas para la obtención directa de células madre embrionarias a través de embriones criopreservados en nitrógeno líquido (-196 ºC, blastómeros individuales, activación de ovocitos por transferencia nuclear y células madre del líquido amniótico. También es posible obtener células madre adultas hematopoyéticas y de la médula ósea, más conocidas y empleadas en la clínica desde hace tiempo, así como también de la sangre del cordón umbilical en recién nacidos y de la grasa corporal en adultos. La grasa autóloga corporal extraída mediante liposucción se reutiliza en ocasiones para injertar o infiltrar otras zonas corporales y faciales como material de relleno, pero en la mayoría de los casos es desechada. Por lo general, para obtener un resultado satisfactorio en el trasplante de grasa autóloga, son necesarios varios tiempos quirúrgicos por lo que sería muy útil contar con un banco de tejido adiposo personalizado. Existen diferentes estudios que demuestran que el tejido adiposo aspirado por liposucción convencional puede preservarse y almacenarse con éxito a baja temperatura (-85 ºC en banco de tejido para futuras aplicaciones. Las células madre mesenquimales (MSCs poseen gran capacidad de proliferación y diferenciación con un alto valor terapéutico. El tejido graso es un reservorio importante de MSCs capaces de diferenciarse en tejido óseo, cartilaginoso, muscular, etc. Si reservamos una pequeña cantidad del tejido graso lipoaspirado, podemos obtener una cantidad suficiente de MSCs y conservarlas mediante un método óptimo de criopreservación. En 2007 realizamos un estudio de la grasa lipoaspirada en 36 pacientes para demostrar y validar el método de obtención de tejido graso con su posterior traslado, manipulación y criopreservación en banco de células madre. Los resultados fueron satisfactorios y en junio del 2010 se validó el método de recogida, procesamiento y almacenamiento

  13. Aboveground Forest Biomass Estimation with Landsat and LiDAR Data and Uncertainty Analysis of the Estimates

    OpenAIRE

    Dengsheng Lu; Qi Chen; Guangxing Wang; Emilio Moran; Mateus Batistella; Maozhen Zhang; Gaia Vaglio Laurin; David Saah

    2012-01-01

    Landsat Thematic mapper (TM) image has long been the dominate data source, and recently LiDAR has offered an important new structural data stream for forest biomass estimations. On the other hand, forest biomass uncertainty analysis research has only recently obtained sufficient attention due to the difficulty in collecting reference data. This paper provides a brief overview of current forest biomass estimation methods using both TM and LiDAR data. A case study is then presented that demonst...

  14. ÉTUDE DE CAS — Dar es-Salaam, Tanzanie : Assurer la sécurité ...

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

    20 déc. 2010 ... En l'absence de services suffisants, les citadins sont passés maîtres dans l'art de « se débrouiller » et d'improviser. Par la force des choses, Dar es-Salaam, ou Dar, est devenue une ville ..... Urban agriculture: Growing food in our cities. City dwellers have been growing their own food for millennia.

  15. Effects of LiDAR point density, sampling size and height threshold on estimation accuracy of crop biophysical parameters.

    Science.gov (United States)

    Luo, Shezhou; Chen, Jing M; Wang, Cheng; Xi, Xiaohuan; Zeng, Hongcheng; Peng, Dailiang; Li, Dong

    2016-05-30

    Vegetation leaf area index (LAI), height, and aboveground biomass are key biophysical parameters. Corn is an important and globally distributed crop, and reliable estimations of these parameters are essential for corn yield forecasting, health monitoring and ecosystem modeling. Light Detection and Ranging (LiDAR) is considered an effective technology for estimating vegetation biophysical parameters. However, the estimation accuracies of these parameters are affected by multiple factors. In this study, we first estimated corn LAI, height and biomass (R2 = 0.80, 0.874 and 0.838, respectively) using the original LiDAR data (7.32 points/m2), and the results showed that LiDAR data could accurately estimate these biophysical parameters. Second, comprehensive research was conducted on the effects of LiDAR point density, sampling size and height threshold on the estimation accuracy of LAI, height and biomass. Our findings indicated that LiDAR point density had an important effect on the estimation accuracy for vegetation biophysical parameters, however, high point density did not always produce highly accurate estimates, and reduced point density could deliver reasonable estimation results. Furthermore, the results showed that sampling size and height threshold were additional key factors that affect the estimation accuracy of biophysical parameters. Therefore, the optimal sampling size and the height threshold should be determined to improve the estimation accuracy of biophysical parameters. Our results also implied that a higher LiDAR point density, larger sampling size and height threshold were required to obtain accurate corn LAI estimation when compared with height and biomass estimations. In general, our results provide valuable guidance for LiDAR data acquisition and estimation of vegetation biophysical parameters using LiDAR data.

  16. Utilizing LiDAR Datasets From Experimental Watersheds to Advance Ecohydrological Understanding in Seasonally Snow-Covered Forests

    Science.gov (United States)

    Harpold, A. A.; Broxton, P. D.; Guo, Q.; Barlage, M. J.; Gochis, D. J.

    2014-12-01

    The Western U.S. is strongly reliant on snowmelt from forested areas for ecosystem services and downstream populations. The ability to manage water resources from snow-covered forests faces major challenges from drought, disturbance, and regional changes in climate. An exciting avenue for improving ecohydrological process understanding is Light Detection and Ranging (LiDAR) because the technology simultaneously observes topography, forest properties, and snow/ice at high-resolution (100 km2). The availability and quality of LiDAR datasets is increasing rapidly, however they remain under-utilized for process-based ecohydrology investigations. This presentation will illustrate how LiDAR datasets from the Critical Zone Observatory (CZO) network have been applied to advance ecohydrological understanding through direct empirical analysis, as well as model parameterization and verification. Direct analysis of the datasets has proved fruitful for pre- and post-disturbance snow distribution estimates and interpreting in-situ snow depth measurements across sites. In addition, we illustrate the potential value of LiDAR to parameterize and verify of physical models with two examples. First, we use LiDAR to parameterize a land surface model, Noah multi-parameterization (Noah-MP), to investigate the sensitivity of modeled water and energy fluxes to high-resolution forest information. Second, we present a Snow Physics and Laser Mapping (SnowPALM) model that is parameterized with LiDAR information at its native 1-m scale. Both modeling studies demonstrate the value of LiDAR for representing processes with greater fidelity. More importantly, the increased model fidelity led to different estimates of water and energy fluxes at larger, watershed scales. Creating a network of experimental watersheds with LiDAR datasets offers the potential to test theories and models in previously unexplored ways.

  17. Motion field estimation for a dynamic scene using a 3D LiDAR.

    Science.gov (United States)

    Li, Qingquan; Zhang, Liang; Mao, Qingzhou; Zou, Qin; Zhang, Pin; Feng, Shaojun; Ochieng, Washington

    2014-09-09

    This paper proposes a novel motion field estimation method based on a 3D light detection and ranging (LiDAR) sensor for motion sensing for intelligent driverless vehicles and active collision avoidance systems. Unlike multiple target tracking methods, which estimate the motion state of detected targets, such as cars and pedestrians, motion field estimation regards the whole scene as a motion field in which each little element has its own motion state. Compared to multiple target tracking, segmentation errors and data association errors have much less significance in motion field estimation, making it more accurate and robust. This paper presents an intact 3D LiDAR-based motion field estimation method, including pre-processing, a theoretical framework for the motion field estimation problem and practical solutions. The 3D LiDAR measurements are first projected to small-scale polar grids, and then, after data association and Kalman filtering, the motion state of every moving grid is estimated. To reduce computing time, a fast data association algorithm is proposed. Furthermore, considering the spatial correlation of motion among neighboring grids, a novel spatial-smoothing algorithm is also presented to optimize the motion field. The experimental results using several data sets captured in different cities indicate that the proposed motion field estimation is able to run in real-time and performs robustly and effectively.

  18. Motion Field Estimation for a Dynamic Scene Using a 3D LiDAR

    Directory of Open Access Journals (Sweden)

    Qingquan Li

    2014-09-01

    Full Text Available This paper proposes a novel motion field estimation method based on a 3D light detection and ranging (LiDAR sensor for motion sensing for intelligent driverless vehicles and active collision avoidance systems. Unlike multiple target tracking methods, which estimate the motion state of detected targets, such as cars and pedestrians, motion field estimation regards the whole scene as a motion field in which each little element has its own motion state. Compared to multiple target tracking, segmentation errors and data association errors have much less significance in motion field estimation, making it more accurate and robust. This paper presents an intact 3D LiDAR-based motion field estimation method, including pre-processing, a theoretical framework for the motion field estimation problem and practical solutions. The 3D LiDAR measurements are first projected to small-scale polar grids, and then, after data association and Kalman filtering, the motion state of every moving grid is estimated. To reduce computing time, a fast data association algorithm is proposed. Furthermore, considering the spatial correlation of motion among neighboring grids, a novel spatial-smoothing algorithm is also presented to optimize the motion field. The experimental results using several data sets captured in different cities indicate that the proposed motion field estimation is able to run in real-time and performs robustly and effectively.

  19. Automated method for measuring the extent of selective logging damage with airborne LiDAR data

    Science.gov (United States)

    Melendy, L.; Hagen, S. C.; Sullivan, F. B.; Pearson, T. R. H.; Walker, S. M.; Ellis, P.; Kustiyo; Sambodo, Ari Katmoko; Roswintiarti, O.; Hanson, M. A.; Klassen, A. W.; Palace, M. W.; Braswell, B. H.; Delgado, G. M.

    2018-05-01

    Selective logging has an impact on the global carbon cycle, as well as on the forest micro-climate, and longer-term changes in erosion, soil and nutrient cycling, and fire susceptibility. Our ability to quantify these impacts is dependent on methods and tools that accurately identify the extent and features of logging activity. LiDAR-based measurements of these features offers significant promise. Here, we present a set of algorithms for automated detection and mapping of critical features associated with logging - roads/decks, skid trails, and gaps - using commercial airborne LiDAR data as input. The automated algorithm was applied to commercial LiDAR data collected over two logging concessions in Kalimantan, Indonesia in 2014. The algorithm results were compared to measurements of the logging features collected in the field soon after logging was complete. The automated algorithm-mapped road/deck and skid trail features match closely with features measured in the field, with agreement levels ranging from 69% to 99% when adjusting for GPS location error. The algorithm performed most poorly with gaps, which, by their nature, are variable due to the unpredictable impact of tree fall versus the linear and regular features directly created by mechanical means. Overall, the automated algorithm performs well and offers significant promise as a generalizable tool useful to efficiently and accurately capture the effects of selective logging, including the potential to distinguish reduced impact logging from conventional logging.

  20. Phylogenetic Relationships between Four Salix L. Species Based on DArT Markers

    Directory of Open Access Journals (Sweden)

    Jerzy A. Przyborowski

    2013-12-01

    Full Text Available The objectives of this study were to evaluate the usefulness of DArT markers in genotypic identification of willow species and describe genetic relationships between four willow species: Salix viminalis, S. purpurea, S. alba and S. triandra. The experimental plant material comprised 53 willow genotypes of these four species, which are popularly grown in Poland. DArT markers seem to identify Salix species with a high degree of accuracy. As a result, the examined species were divided into four distinct groups which corresponded to the four analyzed species. In our study, we observed that S. triandra was very different genetically from the other species, including S. alba which is generally classified into the same subgenus of Salix. The above corroborates the findings of other authors who relied on molecular methods to reveal that the classification of S. triandra to the subgenus Salix was erroneous. The Principal Coordinate Analysis (PCoA and the neighbor-joining dendrogram also confirmed the clear division of the studied willow genotypes into four clusters corresponding to individual species. This confirmed the usefulness of DArT markers in taxonomic analyses and identification of willow species.