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Sample records for adaptaciones al parasitismo

  1. RESPUESTAS Y ADAPTACIONES FISIOLÓGICAS AL ENTRENAMIENTO DE TAEKWONDO. UNA REVISIÓN SISTEMÁTICA

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    Pedro Carazo Vargas

    2013-12-01

    Full Text Available El objetivo de analizar las principales respuestas y adaptaciones fisiológicas que se asocian a la práctica del taekwondo se plantea para evaluar el desarrollo del conocimiento en esta área y orientar a entrenadores y deportistas acerca de los procesos de entrenamientos más apropiados. Por lo tanto, se realiza una búsqueda sistemática en las bases de datos: "Academic Search Complete, ERIC, Medline, SportDiscus, Proquest, y Ovid". De las cuales se toman en cuenta solo investigaciones publicadas en revistas científicas y se incluyen únicamente las variables que fueron analizadas en un mínimo de cinco estudios. Dicho requisito se cumplió para la fuerza (independientemente de su manifestación, la capacidad aeróbica, la frecuencia cardíaca y la producción de lactato sanguíneo. Veintiocho publicaciones aportaron sus hallazgos a la presente revisión bibliográfica. No existe suficiente congruencia en la evidencia desarrollada que permita establecer tendencias sobre el volumen e intensidad de cargas de trabajo más adecuadas para guiar el proceso de entrenamiento de un practicante de taekwondo, ya sea con fines competitivos o de salud. El diseño metodológico de las investigaciones realizadas en el área debe ser mejorado.

  2. Simbiosis y parasitismo

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    Moya, Andrés

    1997-12-01

    Full Text Available Not available.Por mucho tiempo la teoría clásica de la evolución ha estado ajena a dos fenómenos recurrentes en la evolución biológica: la simbiosis y el parasitismo, fenómenos que han servido para formular teorías sobre la generación de novedades evolutivas importantes, aunque con distinto vigor. Desde la perspectiva del análisis de las teorías científicas las razones de la exclusión son distintas. A saber: la simbiosis no tiene fácil tratamiento desde la perspectiva de la demostración empírica de cómo una entidad simbiótica tiene mayor eficacia biológica que las entidades componentes por separado. El parasitismo, por otro lado, se ha visto como involución o pérdida de propiedades evolutivas ganadas por especies ancestrales no parásiticas, y su contribución a la generación de novedades evolutivas no es relevante. Esta situación de mutua ignorancia puede hacerse sin el recurso explícito a teorías antagónicas. Sólo hay que reformular la noción darwiniana de «conflicto» en términos compatibles con la emergencia de novedades evolutivas por la interacción de unidades componentes. Ahora bien, si la generación de tales unidades fuera por la capacidad de «autoorganización» de las mismas es cuando tendríamos un conflicto teórico, el que se plantea entre explicaciones selectivas y no selectivas de generación de novedades evolutivas. El objetivo del presente trabajo es doble: por un lado, plantear la posibilidad formal de integrar simbiosis y parasitismo en el marco de la teoría clásica de la evolución y, segundo, el planteamiento formal del conflicto cuando la simbiosis, específicamente, pudiera ser el producto de la interacción múltiple de unidades componentes en un ambiente donde la selección natural no opera.

  3. Relación clima-vegetación: adaptaciones de la comunidad del jarillal al clima semiárido, Parque Nacional Lihué Calel, provincia de La Pampa, Argentina

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    Valeria Soledad Duval

    2015-01-01

    Full Text Available El estudio de la vegetación desde la Geografía se centra en el análisis de su distribución espacial y los fac - tores que inciden en la misma. Uno de ellos es el clima que determina las características de las formaciones vegetales y, en una escala más grande, a las comunidades. El objetivo de este trabajo es analizar la relación clima-vegetación mediante el estudio de las adaptaciones de la comunidad del jarillal con respecto al clima semiárido en el Parque Nacional Lihué Calel, Argentina. Para ello se realiza el balance hídrico de Thornthwaite y Mather utilizando datos de la estación me - teorológica del parque pertenecientes al periodo 1995-2010. Se aplican índices bioclimáticos y se realizan estands para conocer la composición florística y fisonomía de la vegeta - ción. Se analizan las respuestas adaptativas identificadas en los individuos vegetales relevados y se comprueba que el clima semiárido condiciona la morfología y fisonomía del parque. Se demuestra la presencia de vegetación xerófila con predominio de arbustos y de cobertura abierta. Entre las adaptaciones observadas se distinguen la pérdida de hojas en la estación desfavorable, el reemplazo de hojas por espinas, hojas pequeñas y resinosas, inclinación de la hoja y raíces extensas.

  4. Adaptaciones LIJ de Tirant lo Blanc

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    Lluís Ramon i Ferrer

    2016-06-01

    Full Text Available En este trabajo se analizan las adaptaciones de Tirant lo Blanc a la narrativa infantil y juvenil. Han quedado excluidas aquellas obras que no han considerado la novela en su totalidad así como otros géneros que también han pretendido que la obra de Martorell llegara a un público infantil y juvenil. En primer lugar, se ha establecido el corpus de estudio y, seguidamente, se ha elaborado un catalálogo en el cual se valoran la selección de secuencias del hipotexto verbal, los elementos paratextuales que han concurrido en cada uno de los volúmenes, así como la adecuación al tramo lector al que supuestamente va dirigida la publicación. This paper analyses Tirant lo Blanc narrative adaptations on Children’s and Young Adults Literature. The works which have not considered the novel as a whole have been excluded, as well as other genres which have also wanted to adapt Martorell’s work for the same audience. The study begins by establishing the corpus of the books. Then, a catalogue has been made in order to assess the hypotext sequences selection, the paratextual elements within each of the volumes, and the adaptation adequacy of the contents of the books to the target reader

  5. Aleitamento e parasitismo intestinal materno-infantil

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    Costa-Macedo Lêda Maria

    2000-01-01

    Full Text Available Entre março e maio de 1991, a prevalência das enteroparasitoses e o aleitamento materno foram determinados simultaneamente em 208 crianças menores de dois anos de idade e suas mães, atendidas em Instituição Pública de Saúde no Rio de Janeiro. Através da técnica de sedimentação, detectou-se positividade geral de 12,7% para as crianças, e 37,3% para as mães. Ascaris lumbricoides foi o parasito mais prevalente nas mulheres (12,7% e nos lactentes (4,3%. A distribuição dos parasitos entre os grupos de aleitamento não variou para as mulheres, mas foi estatisticamente significativa em relação às crianças (p < 0,05. Nenhuma criança em aleitamento exclusivo apresentou parasitose. Verificou-se correlação positiva entre parasitismo e desmame. Cerca de 60% das crianças parasitadas eram filhas de mães também parasitadas, sendo detectado um risco 1,7 vezes maior destas crianças virem a apresentar algum parasito intestinal. Acreditamos que a mãe parasitada possa influenciar na freqüência do parasitismo infantil.

  6. Parasitismo intestinal en manipuladores de alimentos

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    Miguel Nicolás Gómez Vital

    1999-01-01

    Full Text Available El parasitismo intestinal representa un significativo problema en la salud mundial. Se realiza un estudio epidemiológico descriptivo en manipuladores de alimentos de los principales centros de elaboración de la ciudad de Santa Clara, provincia Villa Clara, durante 1998. Los enteroparásitos patógenos encontrados por orden de frecuencia fueron la Giardia lamblia y la Entamoeba hitolytica; detectados por método directo y de ritchie para dichos parásitos. La técnica de kato katz fue más eficaz para el diagnóstico de los geohelmintos. Se resalta la función del personal médico en centros de trabajo.Intestinal parasitism is a significant problem for world health. An epidemiological and descriptive study was conducted among food handlers at the main centers of elaboration in the city of Santa Clara, Villa Clara province, during 1998. The pathogenic enteroparasites found by order of frequency were Giardia lamblia and Entamoeba hitolytica, which were detected by using Ritchie's and direct method for such parasites. The Katokatz's technique was more efficient for the diagnosis of geohelminth. It was underlined the function of the medical team at the working centers.

  7. La adaptacion como atributo esencial en el fomento de sistemas agropecuarios resilientes ante las perturbaciones

    National Research Council Canada - National Science Library

    Nahed Toral, Jose; Palma Garcia, Jose Manuel; Gonzalez Garcia, Eliel

    2014-01-01

    El presente trabajo tuvo como objetivo documentar algunos fundamentos teoricos del enfoque de sistemas y de la adaptacion como atributo primordial para conseguir sistemas agropecuarios resilientes y sostenibles...

  8. Survey del parasitismo intestinal de las ratas grises (Mus norvegicus en la ciudad de Lima

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    Víctor M Ayulo R

    1947-12-01

    Full Text Available Hemos hecho un survey del parasitismo intestinal en 1,000 ratas grises (Mus norvegicus capturadas en la ciudad de Lima, llegando a las siguientes conclusiones: 1.- La incidencia del parasitismo intestinal en las ratas examinadas es de 87.30%. 2.- El 46.50% de estos roedores son portadores de protozoos intestinales. 3.- La incidencia de infestación con E. histolytica es muy baja: 1.7%. 4.- Las ratas examinadas en la ciudad de Lima son portadoras de Blastocystis hominis en el 18.4%. 5.- La incidencia de infestación con helmintos es 76.40%. 6.- Dada la gran infestación de las ratas grises con Hymenolepis nana, Hymenolepis diminuta, y Gigantorhynchus moniliformis, debemos considerar a estos roedores como reservorios potenciales en la trasmisión de estos parásitos al hombre, mientras otras investigaciones no excluyan a la rata gris como reservorio. 7.- El análisis estadístico de la frecuencia de infestación arroja un promedio o media de 2.11 ± 0.06 parásitos diferentes por rata y un coeficiente de variación de 78%. Los límites de infestación de las ratas examinadas oscilan entre 1 y 6 parásitos diferentes por animal.

  9. Morbilidad oculta por parasitismo intestinal en Lagunita, municipio Girardot, Venezuela

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    Yanelis Núñez Gómez

    2014-08-01

    Full Text Available Se realizó un estudio epidemiológico descriptivo de corte transversal, con el objetivo de determinar la morbilidad oculta por parasitismo intestinal en Lagunita, municipio Girardot, Venezuela; en el período de enero a octubre de 2009. El universo fue de 286 niños, lo que se corresponde con la población total del grupo de edad de menores de 15 años. De estos se seleccionaron por muestreo aleatorio simple 43 pacientes, a los que se les aplicó un cuestionario y se confeccionó una guía de observación, para describir los factores epidemiológicos que influyen en la infestación por parasitismo intestinal. Además, se les realizaron análisis de las heces fecales seriadas para el diagnóstico del parasitismo. El método estadístico fue el cálculo de las frecuencias absolutas y relativas. A través del estudio de las heces fecales seriadas se obtuvo que 27 pacientes tenían parasitosis intestinal, para una morbilidad de 62,79%, con una mayor incidencia en los niños de cinco a nueve años de edad. El sexo femenino fue el más afectado. Los factores epidemiológicos que más influyeron fueron: los malos hábitos higiénicos personales, el entorno desfavorable y el consumo de agua no potable; existió relación entre el nivel socioeconómico, los factores epidemiológicos y la morbilidad por parasitismo intestinal. Predominó la parasitosis por Entamoeba Histolytica, con 11 casos, para un 40,74%. La diarrea, las molestias abdominales y la pérdida de apetito constituyeron los principales síntomas

  10. Cervantisme català i traducció: anàlisi d'adaptacions infantils i juvenils

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    Rosa Agost

    2013-07-01

    Full Text Available Al voltant de 2005, quart centenari de la publicació de la primera part del Quixot, hem constatat l’aparició de vint adaptacions i versions al català per a joves i infants d’aquesta obra cervantina. La dada resulta especialment significativa si tenim en compte que durant els tres segles anteriors únicament se’n van editar set. En aquest article oferirem una relació i una anàlisi descriptiva que integra text i imatge, de totes les reescriptures derivades de l’obra original adreçades al públic infantil i juvenil, amb referència especial a aquelles publicades entre 2004 i 2005. Així mateix, analitzarem les dades obtingudes de l’anàlisi des d’una perspectiva holística que ens permet descriure alguns factors del context comunicatiu, especialment determinats aspectes sociològics de les adaptacions, estudiar la importància de determinats elements paratextuals i sistematitzar algunes estratègies i tècniques de traducció que s’han fet servir.

  11. Reescrituras divulgativas del mito cidiano. Descripción y análisis de adaptaciones y versiones contemporáneas representativas del Cantar de Mio Cid.

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    Aldo Daparte Jorge

    2014-12-01

    Full Text Available Las polémicas adaptaciones de los clásicos al servicio de los mediadores en la enseñanza literaria o de la divulgación de obras canónicas han generado una literatura en segundo grado marcada por ricas relaciones hipertextuales (Genette. El objetivo de este trabajo es dar una visión panorámica de los elementos textuales y paratextuales implicados en una selección representativa de adaptaciones de la materia cidiana, preferentemente gestadas con intención didáctica, debidamente contextualizadas en la tradición de adaptaciones del Cantar de Mio Cid. Dicho análisis permite comprobar los rasgos específicos que caracterizan este proceso, sustancialmente distinto al seguido en la reescritura de otras obras del canon español, debido a factores como las fuentes histórico-legendarias y literarias de la materia argumental, la forma del relato o su performance.

  12. Parasitismo imaginario: experiencia clínica y diagnóstica

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    Ólger Calderón-Arguedas

    2012-09-01

    Full Text Available Objetivo: describir los casos de parasitismo imaginario observados en el Laboratorio de Entomología Médica, Facultad de Microbiología, Universidad de Costa Rica durante 20012011. Métodos: se describen 9 casos cuyas características coincidieron con cuadros de parasitismo imaginario, y se analiza la “evidencia diagnóstica” aportada por algunos de los pacientes como causa de su enfermedad. Resultados: los pacientes refirieron problemas crónicos a nivel de piel y cuero cabelludo con síntomas y signos atribuidos, según su propio criterio, a diferentes tipos de artrópodos. Dichos pacientes ya habían recurrido a consultas previas, sin éxito en el diagnóstico esperado. Las muestras aportadas permitieron identificar artrópodos como psycodinos (Diptera: Psychodinae, psócidos (Psocoptera, moscas (Diptera: Cyclorrhapha, homópteros (Homoptera, hormigas (Hymenoptera: Formicidae, (isópteros y arañas (Arácnida: Aranea los cuales son irrelevantes en cuanto a su importancia médica. También se detectaron granos, fibras vegetales, coágulos de fibrina y trozos de queratina dérmica. Discusión: se hace énfasis al personal clínico y de laboratorio para la ejecución de un correcto diagnóstico e identificación de las posibles causas, antes de proceder a administrar un tratamiento medicamentoso antiparasitario

  13. Algunas observaciones sobre parasitismo intestinal en escolares de Iquitos

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    Luis Gonzales-Mugaburu

    1955-12-01

    Full Text Available El examen parasitológico de 100 escolares de la ciudad de Iquitos, en dos fechas diferentes, ha confirmado una vez más el alto porcentaje a Ancylostoma o Necator (98.5%. La repetición del examen parasitológico ha rendido un mayor porcentaje a Strongyloides stercoralis (60.6% que el señalado por otros autores. La intensidad del parasitismo por Ancylostoma o Necator es más o menos similar a la ya conocida.

  14. Adaptaciones inconfesas en el cine español. Unacknowledged adaptations in the spanish cinema

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    David Ramírez Gómez

    2011-10-01

    Full Text Available La literatura es la principal fuente de inspiración del cine. La traslación de un medio a otro conlleva grandes ventajas al contar con un material ya elaborado y testado, lo que puede facilitar el éxito crítico y comercial. No obstante, también acarrea problemas, como la necesidad de convencer al autor para que venda sus derechos y la presión de competir con el libro para no defraudar a sus lectores. El cine ha encontrado una fórmula para sortear estos problemas en las adaptaciones inconfesas, es decir, películas cuyo guión se elabora sobre la estructura de una obra literaria y cambia los aspectos externos que indicarían al espectador su procedencia. El texto hace un recorrido de las principales manifestaciones de esta práctica en la cinematografía española, con casos como el de Viridiana, Ana y los lobos o La ciudad maldita.

  15. Analisis de la adaptacion a la red en las editoriales on line de cinco paises europeos

    National Research Council Canada - National Science Library

    Garcia Orosa, B; Lopez Garcia, X; Gallur Santorum, S

    2013-01-01

    [ES] Introduccion. El articulo analiza los editoriales de periodicos on line de cinco paises europeos con el objetivo principal de realizar una radiografia de sus caracteristicas y su grado de adaptacion a la red. Metodologia...

  16. La adaptacion como atributo esencial en el fomento de sistemas agropecuarios resilientes ante las perturbaciones

    National Research Council Canada - National Science Library

    Nahed Toral, Jose; Palma Garcia, Jose Manuel; Gonzalez Garcia, Eliel

    2014-01-01

    .... Con un enfoque aplicado y dinamico, en la primera parte se analizan algunas estrategias de integracion y adaptacion que permitirian aumentar la resiliencia y reducir la vulnerabilidad de los sistemas...

  17. Adaptaciones de puestos de trabajo de centros de salud en trabajadores especialmente sensibles a riesgos laborales

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    Ana Padilla Fortes

    2014-09-01

    Full Text Available Este estudio explora los ajustes trabajo-persona realizados en trabajadores considerados especialmente sensibles a determinados riesgos laborales en el sector sanitario. El propósito de esta investigación fue ayudar a caracterizar las adaptaciones del puesto de trabajo con motivo de la comunicación de algún tipo de discapacidad o limitación de salud que interfiere en el desempeño de tareas. A lo largo del año 2012, en los centros de salud de un distrito de atención primaria se contabilizó un total de 46 trabajadores calificados especialmente sensibles que recibieron un promedio de 3,2 medidas de adaptación en el lugar y/o puesto de trabajo. Los hallazgos mostraron una amplia variedad de ajustes que incluyeron modificaciones en la organización del trabajo, en la forma de desempeñar las tareas, y en menor grado, cambios en los factores ambientales próximos al puesto y/o lugar de trabajo. Todas las medidas estuvieron encaminadas a facilitar la continuidad de la vida laboral dentro de unos límites compatibles con la seguridad y salud del trabajador. Nuestros resultados ofrecen una primera aproximación al conocimiento de los aspectos de gestión de las limitaciones de salud que menoscaban la capacidad de los trabajadores para responder a las demandas de trabajo.

  18. Epidemiologia del parasitismo intestinal infantil en el Valle del Guadalquivir

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    Pérez Armengol Cristina; Ariza Astolfi Concepción; Úbeda Ontiveros José M.; Guevara Benítez Diego C.; Rojas Alvarez Manuel de; Lozano Serrano Carmen

    1997-01-01

    FUNDAMENTO: Las parasitosis intestinales en los niños constituyen un problema de salud pública que debe ser valorado periódicamente en cada región. En este trabajo se aborda, por primera vez en la región natural del Valle del Guadalquivir, un estudio amplio sobre la prevalencia del parasitismo intestinal en la población infantil de la zona. MÉTODOS: Durante el período 1994-1996, mediante análisis coprológico y método de Graham, se ha estudiado a 1.917 niños y niñas asintomáticos, con edades c...

  19. Structure of claws and toes of two tropidurid lizard species of Restinga from Southeastern Brazil: adaptations to the vertical use of the habitat Estructura de garras y dedos en dos lagartos tropidúridos de Restinga, sureste de Brasil: adaptaciones al uso vertical del hábitat

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    Sueli Carvalho Ribas

    2004-12-01

    Full Text Available Tropidurus torquatus and Liolaemus lutzae, found in a restinga habitat, show some morphological differences associated with differential microhabitats use. There were made measurements of the snout-vent length, length and width of the largest toe of hand and foot, and length, width, height and curvature of the claws. We counted the number of adhesive lamellae of the largest toe of each member. T. torquatus has larger toes, greater number of adhesive lamellae and higher and more curve claws than L. lutzae. No significant differences in toe and claw widths were found. These results suggest that the differences found in the morphology of toes and claws of these two species would be associated with the differential microhabitat use. T. torquatus has morphological adaptations that allow it to use the microhabitat both vertically or horizontally, while L. lutzae use it only horizontallyTropidurus torquatus y Liolaemus lutzae hallados en un hábitat de restinga, muestran algunas diferencias morfológicas asociadas a el uso diferencial de microhábitats. Se realizaron mediciones de la longitud "snout-vent", longitud y ancho del dedo mayor de la mano y el pie y, longitud, ancho, altura y curvatura de las garras. Se contó el número de lamelas adhesivas del dedo mayor de cada miembro. T. torquatus posee dedos más grandes, mayor número de lamelas adhesivas y garras más altas y curvadas que L. lutzae. No se hallaron diferencias significativas en los anchos de dedos y garras. Estos resultados sugieren que las diferencias encontradas en la morfología de dedos y garras de estas dos especies estarían asociadas con el uso diferencial del microhábitat. T. torquatus posee adaptaciones que le permiten utilizar el microhábitat tanto vertical como horizontalmente, mientras que L. lutzae solamente lo utiliza en forma horizontal

  20. Comportamiento de parasitismo intestinal en el área de salud de Potrerillo

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    Juana Neycy Cazorla Pastor

    2015-12-01

    Full Text Available Fundamento: las enfermedades parasitarias continúan teniendo importancia fundamental en países del tercer mundo por los daños que producen al hombre. Objetivo: describir el comportamiento del parasitismo intestinal en un área de salud rural.Métodos: estudio descriptivo realizado en el área de salud de Potrerillo, que incluyó 286 pacientes a los que se les realizó análisis de heces fecales. Se analizó edad y parásitos encontrados.Resultados: de los 286 análisis realizados 52 resultaron positivos, para un frecuencia parasitaria de 18, 1 %; entre los protozoarios predominó la Entamoeba histolytica con 8, 04 % fundamentalmente en adultos (6, 99 %, la Giardia lamblia (5,59 % con predominio en los niños (3, 49 %, la frecuencia de presentación de los helmintos fue de 4, 53 % y predominó el Áscaris lumbricoides con 4, 19 % entre los infantes (ocho niños y cuatro adultos 1,39 % y Trichuris trichiura (0, 34 % en un niño.Conclusiones: aún existe una frecuencia de presentación moderada de parasitosis en el área de salud.

  1. Parasitismo larval de Crocidosema (=Epinotia aporema (Lepidoptera: Tortricidae en el noreste de la provincia de Buenos Aires (Argentina

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    Gerardo LILJESTHRÖM

    2005-01-01

    Full Text Available En la interacción huésped-parasitoide las plantas suelen emitir señales capaces de aumentar la eficiencia de los parasitoides. Las larvas de Crocidosema (=Epinotia aporema (Walsingham se alimentan endofíticamente de leguminosas herbáceas y constituyen una plaga de la soja (Glycine max Merrill. En este estudio analizamos el parasitismo larval de C. aporema en Melilotus albus Medikus, Galega officinalis L, Lupinus albus L y G. max, en el noreste de Buenos Aires. La densidad larval fue mayor en L. albus (109,2 larvas/m2 que en las restantes leguminosas: 3,7; 6,9 y 11,3 en M. albus, G. officinalis y G. max, respectivamente. Sin embargo, el parasitismo y número de especies parasitoides fueron menores en L. albus (9,5% por el ectoparasitoide generalista Bracon sp. que en M. albus (32,6%, Bracon sp. y los endoparasitoides Trathala sp.y Bassus sp.; G. officinalis y G. max (26,4% y 50,6% respectivamente, con Trathala sp. y Bracon sp. en ambas. Lupinus albus fue la única especie vegetal que reaccionó a la alimentación de C. aporema con producción de exudados pegajosos y olorosos que podrían haber repelido los endoparasitoides, actuando como un refugio parcial para C. aporema. Además, al ser positivamente seleccionada por C. aporema, esta leguminosa podría utilizarse como franja trampa para su control en cultivos de soja, de manera compatible con tácticas de control biológico por conservación de enemigos naturales.

  2. Influência da idade dos ovos de Oxydia vesulia no parasitismo de Trichogramma maxacalii.

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    Oliveira Harley Nonato de; Pratissoli Dirceu; Zanuncio José Cola; Serrão José Eduardo

    2003-01-01

    Trichogramma é um dos gêneros de insetos mais importantes no controle biológico. Este trabalho avaliou o potencial de parasitismo de Trichogramma maxacalii em ovos de Oxydia vesulia, em diferentes estágios embrionários. Vinte e cinco ovos de O. vesulia, com um, três, cinco e sete dias de idade foram oferecidos a uma fêmea de T. maxacalii, em ensaio com 15 repetições, por um período de 24 horas. Não houve influência da idade dos ovos de O. vesulia na porcentagem de parasitismo, na viabilidade,...

  3. Epidemiologia del parasitismo intestinal infantil en el Valle del Guadalquivir

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    Pérez Armengol Cristina

    1997-01-01

    Full Text Available FUNDAMENTO: Las parasitosis intestinales en los niños constituyen un problema de salud pública que debe ser valorado periódicamente en cada región. En este trabajo se aborda, por primera vez en la región natural del Valle del Guadalquivir, un estudio amplio sobre la prevalencia del parasitismo intestinal en la población infantil de la zona. MÉTODOS: Durante el período 1994-1996, mediante análisis coprológico y método de Graham, se ha estudiado a 1.917 niños y niñas asintomáticos, con edades comprendidas entre seis y diez años, residentes en veinte localidades del Valle del Guadalquivir. RESULTADOS: El índice global de parasitación ha sido del 27,12 %. Las especies parásitas detectadas, así como sus prevalencias fueron: Enterobius vermicularis (20,44%, Giardia lamblia (5,05%, Entamoeba coli (2,45%, Endolimax nana (1,61%, Entamoeba histolytica (0,31%, Entamoeba hartmanni (0,05%, Iodamoeba bütschlii (0,05%. CONCLUSIONES: La prevalencia global encontrada es similar a la de otras regiones españolas, aunque quizás pueda considerarse algo más favorable. No se detectan geohelmintos, debido posiblemente a la mejora de la infraestructura higiénico-sanitaria y a los efectos de la prolongada sequía en la zona. La giardiasis, a diferencia de las restantes protozoosis, mantiene una prevalencia relativamente alta.

  4. Seguimiento de los efectos de una intervencion psicosocial sobre la adaptacion academica, emocional y social de ninos con TDAH

    National Research Council Canada - National Science Library

    Presentacion Herrero, M. Jesus; Siegenthaler Hierro, Rebeca; Jara Jimenez, Pilar; Miranda Casas, Ana

    2010-01-01

    ... con TDAH de 7 a 10 anos, sus padres y sus profesores. La intervencion tuvo una duracion de 10 semanas e incluyo modificacion de conducta, tecnicas cognitivo-conductuales, adaptaciones academicas y habilidades sociales...

  5. Intervención educativa para prevenir el parasitismo intestinal en niños de 0 a 9 años

    Directory of Open Access Journals (Sweden)

    Mayelín Ávila Labrada

    2015-06-01

    Full Text Available Fundamento: entre las enfermedades infecciosas, las producidas por parásitos constituyen un problema médico-social que afecta a los países subdesarrollados y a países de alto desarrollo económico. Objetivo: realizar una intervención educativa, con las madres de niños menores de 9 años pertenecientes al Consultorio Médico de Familia # 29, del reparto 26 de Julio, Bayamo, durante el período comprendido entre octubre de 2013 a marzo de 2014, para elevar el nivel de conocimiento sobre medidas de control del parasitismo. Métodos: se realizó un estudio de intervención educativa, diseñado al respecto y aplicado a un grupo de madres, en el referido consultorio, perteneciente al policlínico Jimmy Hirzell, del municipio Bayamo, durante el tiempo señalado. La muestra estuvo constituida por 84 niños y sus 41 madres, a las que se les aplicó un cuestionario antes y después de la intervención. Se midieron las variables nivel de conocimientos sobre factores de riesgo, medidas preventivas y conducta a seguir ante el parasitismo intestinal. Se tomó muestra de heces fecales a los niños antes de iniciar la intervención y pasados 6 meses, para comprobar si se encontraban o no parasitados. Resultados: inicialmente, un pequeño porcentaje de madres respondieron correctamente el cuestionario aplicado, al término de la intervención esto mejoró a un 95,12%. De manera similar, al inicio solo el 26.82% manejaba adecuadamente el dominio y correcta aplicación de las medidas de prevención, luego del curso, al aplicar el cuestionario final, todos demostraron haber adquirido los conocimientos. Antes de aplicar la intervención 60 niños estaban infestados y transcurridos 6 meses después de culminada este se redujo a solo 15 niños. Conclusiones: mediante la intervención educativa se constató inicialmente la existencia de un gran desconocimiento en estos aspectos y se logró un incremento en el nivel de conocimientos, reflejándose en la disminuci

  6. Adaptaciones curriculares: Convergencias y divergencias de su implementación en el profesorado chileno

    Directory of Open Access Journals (Sweden)

    Braulio Ademir Navarro-Aburto

    2016-01-01

    Full Text Available Recibido 13 de marzo de 2015 • Corregido 29 de octubre de 2015 • Aceptado 17 de noviembre de 2015La presente investigación describe el proceso que se realiza para llevar a cabo las adaptaciones curriculares, en la asignatura de matemática para el alumnado que presenta algún tipo de necesidad educativa especial transitoria. Se ha considerado la coordinación existente entre docentes de Matemática y de Educación Diferencial, como acción promotora de las adaptaciones curriculares. La metodología utilizada corresponde a la cualitativa con un enfoque fenomenológico, y la principal técnica de recolección de datos fue la entrevista semiestructurada, participantes de este estudio fueron 10 docentes de 2 instituciones educativas con programa de integración. Los principales hallazgos arrojan que profesorado y personal encargados del Programa de Integración Escolar cumplen con las normativas y requerimientos  del Decreto Nº 170 en relación con las adaptaciones curriculares, pero dicho cumplimiento está sujeto a la informalidad en la articulación y planificación debido a la falta de tiempo y recursos disponibles. De este modo, como conclusión se plantea que existe una necesidad constante de adaptaciones curriculares, pues son un mecanismo que permite lograr la individualización de la enseñanza, mejorando la calidad de vida y la educación especial en Chile.

  7. Parasitismo imaginario: experiencia clínica y diagnóstica Delusional parasitosis: Clinical and Diagnostic Experience

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    Ólger Calderón-Arguedas

    2012-09-01

    Full Text Available Objetivo: describir los casos de parasitismo imaginario observados en el Laboratorio de Entomología Médica, Facultad de Microbiología, Universidad de Costa Rica durante 20012011. Métodos: se describen 9 casos cuyas características coincidieron con cuadros de parasitismo imaginario, y se analiza la “evidencia diagnóstica” aportada por algunos de los pacientes como causa de su enfermedad. Resultados: los pacientes refirieron problemas crónicos a nivel de piel y cuero cabelludo con síntomas y signos atribuidos, según su propio criterio, a diferentes tipos de artrópodos. Dichos pacientes ya habían recurrido a consultas previas, sin éxito en el diagnóstico esperado. Las muestras aportadas permitieron identificar artrópodos como psycodinos (Diptera: Psychodinae, psócidos (Psocoptera, moscas (Diptera: Cyclorrhapha, homópteros (Homoptera, hormigas (Hymenoptera: Formicidae, (isópteros y arañas (Arácnida: Aranea los cuales son irrelevantes en cuanto a su importancia médica. También se detectaron granos, fibras vegetales, coágulos de fibrina y trozos de queratina dérmica. Discusión: se hace énfasis al personal clínico y de laboratorio para la ejecución de un correcto diagnóstico e identificación de las posibles causas, antes de proceder a administrar un tratamiento medicamentoso antiparasitarioAim: To describe the cases of delusional parasitosis observed in the Laboratory of Medical Entomology, School of Microbiology, University of Costa Rica during 2001-2011. Methods: Nine cases compatible with delusional parasitosis are described. The “diagnostic evidence” provided by patients as cause of their illness is also analyzed. Results: These patients referred chronic problems on skin and scalp with signs and symptoms attributed, in their opinion, to different types of arthropods. These patients had already been evaluated by a physician and had been unsuccessful with the expected diagnosis. The samples provided included

  8. Las adaptaciones curriculares de pequeno porte o no significativas en el contexto brasileño

    OpenAIRE

    Heredero, Eladio Sebastián

    2007-01-01

    La presente comunicación pretende conceptualizar qué se entiende por adaptaciones curriculares de pequeño porte dentro de la legislación brasileña, organizar todas las respuestas que a diferentes niveles pueden darse dentro de la escuela inclusiva que en estos momentos vivimos y además aportar ideas y estrategias concretas para organizar esta medida de atención a la diversidad de la manera más eficaz posible. A partir de la reflexión sobre el trabajo en el aula y de la experiencia vivida ...

  9. Collimator with compensated filtration: clinical adaptation for recommendation 4f of the EU about the radiation protection in oral dental radiology; Colimador con filtracion compensada: adaptacion clinica para alcanzar la recomendacion 4F de la Union Europea sobre proteccion radiologica al paciente en radiologia odontologica

    Energy Technology Data Exchange (ETDEWEB)

    Alcaraz, M.; Garcia-Vera, C.; Bravo, C. La; Morant, J. J.; Armedo, D. Y.; Canteras, M.

    2006-07-01

    Recent recommendations by the European Union (2004) for performing lateral cranial cephalometry (LCC) state that collimation should be maximized so that only those tissues necessary are irradiated when performing clinical diagnoses, although the fact that many manufacturers do not incorporate these elements in their equipment design has been recognised (recommendations 4f). Aim: the manufacture and utilization of a collimator with a pre-patient compensating filter for LLC which may be used in most extraoraldental radiology units, as well as determining the reduction in the dose of radiation absorbed by more sensitive tissues exposed to said clinical exploration. Making use of mannequins, phantom and craniums, we constructed a collimator with a compensating filter and established the necessary technical, dosimetric and quality specifications for its clinical use. Subsequently, we studied 16 patients referred for cephalometric study, determining the radiation dose (TLDs) in both the patients (crystalline lens, frontal lobe, parotid/submaxillary/thyroid glands and brain) and in the radiographic film, as well as in different parts of the collimator/filter. Al presented we are aiming for its clinical use by carrying out LCC in another 16 patients referred of orthodontic treatment but with the pre-a patient introduction of the tested collimator with the compensating filter as a substitute for the usual technique. The collimation reduced the field or radiation by some 40% and with that, so too the radiated tissues. The compensating filter reduced the dose in tissues by some 34.2. Our collimator has allowed the radiological image to be obtained with only one third the usual radiation dose. The dose reaching the film shies only between 17% less than in the usual technique and didn't alter its diagnostic capacity. A reduction of 61,6% of the dose administered to the patient is achieved by incorporating the collimator and filter to most radiological equipment without the

  10. Fluctuación poblacional y parasitismo de larvas de Copitarsia Decolora Guenée, Plutella Xylostella L. y Trichoplusia ni Hübner (Lepidoptera) en Brassica Oleracea L.

    OpenAIRE

    2007-01-01

    La fluctuación poblacional y los porcentajes de parasitismo se determinaron para larvas de Copitarsia decolora (Guenée), Plutella xylostella L. y Trichoplusia ni Hübner, asociadas con Brassica oleracea L. en tres variedades, col, coliflor y brócoli, durante abril de 2004 a abril de 2005, en Acatzingo, Puebla, México. Se realizaron muestreos al azar cada 14 días en 10 plantas por variedad; las larvas totales fueron contabilizadas, colectadas y mantenidas en una cámara de cría a 27º C ± 1º C y ...

  11. On the tissular parasitism of Trypanosoma cruzi y strain in swiss mice Sobre o parasitismo tecidual da cepa Y do Trypanosoma cruzi em camundongos albinos (Swiss-Webster

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    Maria Auxiliadora de Sousa

    1984-12-01

    Full Text Available A review of the tissular parasitism of Trypanosoma cruzi Y strain in Swiss mice was carried out. This strain parasitized preferentially smooth, skeletal and cardiac muscle fibers, with low transitory spleen and liver parasitism, as previously found by some Authors, although differing from other reports. These results can be related to the host genetical constitution and/or the degree of the strain virulence at the time of this study. Furthermore, we discuss that the high macrophagotropism reported for this strain in some instances could be an artificially induced condition resulting from its serial maintenance in mice, either for a longer time and/or by using young animals. The heavy parasitism and inflammation observed in the bladder, pancreas and spermatic duct of some inoculated mice, as well as the testis parasitization, were also noteworthy findings.Através deste trabalho fizemos uma revisão do parasitismo tecidual da cepa Y do Trypanosoma cruzi em camundongos albinos (Swiss-Webster. Esta cepa parasitou preferencialmente as fibras musculares lisas, esqueléticas e cardíacas, sendo baixo e transitório seu parasitismo do baço e fígado, conforme já observado por alguns Autores, embora diferindo de outros achados. Estes resultados podem estar relacionados com o padrão genético do hospedeiro e/ou com o grau de virulência da cepa por ocasião deste estudo. Além do mais, discutimos a possibilidade de que o intenso macrofagotropismo descrito para esta cepa em algumas ocasiões possa ser uma condição artificialmente induzida através de sua manutenção seriada em camundongos por tempo prolongado e/ou pelo uso de animais jovens. Também são dignos de nota, o intenso parasitismo e inflamação da bexiga, pâncreas e canal espermático de alguns animais inoculados, assim como, o encontro de ninhos de amastigotas no testículo.

  12. Estudo comparativo entre o método convencional e o método da peroxidase anti-peroxidase na pesquisa do parasitismo tissular na cardiopatia chagásica crônica

    Directory of Open Access Journals (Sweden)

    A. J. A. Barbosa

    1986-04-01

    Full Text Available Na maioria dos chagásicos crônicos o Trypanosoma cruzi não é detectado no tecido ou apresenta se com extrema raridade, mesmo quando é pesquisado exaustivamente. Sendo os métodos utilizados, até então, inespecíficos para a demonstração do T. cruzi, propôs-se no presente trabalho proceder ao estudo comparativo entre o método convencional (HE e o método imunocitoquímico pela peroxidase anti-peroxidase (PAP, na avaliação quantitativa do parasitismo. Selecionaram-se 3 casos de cardiopatia chagásica crônica e, de um mesmo fragmento de cada caso, obtiveram se cortes que foram corados pelo H.E. (média de 100 cortes por caso e, consecutivamente, outros que foram corados pelo PAP (média de 70 cortes por caso. O caso n.° 1 foi autopsiado em 1952 e apresentava parasitismo freqüente. Nos demais, o exame rotineiro foi negativo. Obtiveram-se os seguintes resultados expressos em n.° de ninhos/100 cortes, respectivamente, corados pelo H.E. e pelo P.A.P. (HE/PAP. Caso n.° 1 - 80/171; caso n.° 2 = 5/116 e caso n.° 3 = 1/2. Os resultados mostram que o método imunocitoquímico empregado, além de facilitar o diagnóstico do parasitismo, demonstra também pequenos ninhos de amastigotas que dificilmente seriam diagnosticados pelos métodos convencionais; além disso mostrou-se útil mesmo em tecido incluídos em parafina há longo tempo.

  13. Parasitismo intestinal en niños que asisten a un círculo infantil del municipio de Puerto Padre

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    Keilan Diéguez Leiva

    2014-11-01

    Full Text Available Se realizó un estudio descriptivo y transversal, para determinar la incidencia del parasitismo intestinal en niños que asisten al círculo infantil “Flores de la Vida” del municipio de Puerto Padre, en el período comprendido entre el primero de septiembre de 2010 y el 31 de mayo de 2011. La muestra estuvo conformada por los 181 niños matriculados en esta institución. Para dar salida a los objetivos se diseñó un formulario y la revisión exhaustiva de las historias clínicas. A los padres de cada niño, previo consentimiento, se les aplicó un instrumento de recogida de datos de interés epidemiológico. Se tomaron muestras de heces fecales de los niños y fueron estudiadas por el examen directo de heces y el método de concentración de Willis-Malloy modificado. Se observó una incidencia de parasitismo intestinal de un 51,4 %, el grupo de edad más afectado fue el de sexto año de vida, con un 58,1 % y el sexo masculino con un 32,5 %, siendo los cólicos abdominales el síntoma que más acompañó a los afectados. La Giardia lamblia fue el parásito más frecuente. Los factores asociados que más abundaron en la muestra fueron el beber agua sin hervir, comerse las uñas o tener el hábito de succión digital y caminar descalzo

  14. Parasitismo gastrintestinal em diferentes intensidades de pastejo no capim Tânzania, em caprinos

    OpenAIRE

    Silva, Helenara Machado da [UNESP

    2008-01-01

    Os objetivos gerais deste estudo visaram verificar o parasitismo gastrintestinal em diferentes intensidades de pastejo no capim Tanzânia (Panicum maximum (Jacq.) cv. Tanzânia-1), em caprinos e avaliar o método Famacha em cabras ¾ Boer ¼ Saanen e Saanen, criadas em sistema de pastejo, sob condições subtropicais. Foram utilizadas 65 cabras, sendo 21 cabras da raça Saanen e 44 cabras de composição genética ¾ Boer ¼ Saanen, pesando entre 35 a 40 kg. No tratamento de baixa intensidade de pastejo (...

  15. El CAD-S, un instrumento para la evaluacion de la adaptacion al divorcio-separacion

    National Research Council Canada - National Science Library

    Yarnoz Yaben, Sagrario; Comino Gonzalez, Priscila

    2010-01-01

    ... de la investigacion sobre el tema del divorcio y sus consecuencias en adultos y ninos (Hetherington, 2005; vease tambien Amato, 2000; y Kelly, 2000, para una amplia revision) que puede servir de base a posibles tratamientos o intervenciones preventivas es importada de paises como los Estados Unidos. Lo mismo ocurre con los instrumentos de evaluacion. En el momento ...

  16. RESPUESTAS, ADAPTACIONES Y SIMETRÍA DE LA HUELLA PLANTAR PRODUCIDAS POR LA PRÁCTICA DE LA MARCHA ATLÉTICA

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    José Luis López Elvira

    2006-01-01

    Full Text Available El propósito de este trabajo fue determinar el efecto que tiene la práctica de la marcha atlética sobre las estructuras del pie, tanto en las respuestas inmediatas a la práctica como en las adaptaciones a largo plazo por el entrenamiento. Para ello se realizaron tres tomas de la huella plantar por el método el fotopodograma a una muestra de 17 marchadores jóvenes. La primera y segunda toma se realizaron en ambos pies a mediados de temporada, en reposo y tras 30 min de marcha respectivamente. La tercera toma también en reposo sobre el pie dominante 3 meses después, al final de la temporada. Los resultados indican que no hay diferencias entre el pie derecho e izquierdo, ni antes ni después del ejercicio. Sin embargo, al analizar el efecto en las respuestas se encontraron comportamientos distintos. Mientras que el pie derecho mostró incrementos significativos en el ancho del antepié y mediopié (P < 0,05, en el pie izquierdo se manifestó un incremento en la longitud del pie. Este comportamiento distinto puede deberse a las características del circuito sobre el que se realizó la marcha, circular con giro a la izquierda. Esto nos lleva a sugerir que para evitar posibles sobrecargas y descompensaciones los entrenamientos se desarrollen en circuitos equilibrados en curvas a ambos lados, o en caso de realizarse en circuito cerrado, que se cambie con frecuencia el sentido de giro. En cuanto a las adaptaciones, siguen un patrón similar al de las respuestas del pie derecho, se encontraron incrementos significativos en el ancho del antepié, aunque también se incrementó significativamente la longitud del pie, si bien creemos que esto último puede haberse debido al desarrollo propio de los atletas, ya que muchos se encontraban en edad de crecimiento.

  17. Caracteristicas psicometricas de la adaptacion colombiana del Cuestionario de Agresividad de Buss y Perry en una muestra de preadolescentes y adolescentes de Bucaramanga

    National Research Council Canada - National Science Library

    Lorenzo-Seva, Urbano; Vigil-Colet, Andreu; Chahin-Pinzon, Nicolas

    2012-01-01

    Este estudio presenta la adaptacion colombiana del Cuestionario de Agresividad de Buss y Perry para preadolescentes y adolescentes, desarrollado a partir de la version espanola abreviada de 20 items...

  18. Prevalencia de parasitismo intestinal y situacion nutricional en escolares y adolescentes de Tunja.(Perspectiva general de la enfermedad/trastorno)

    National Research Council Canada - National Science Library

    Suescun-Carrero, Sandra Helena; Manrique-Abril, Fred Gustavo

    2011-01-01

    Objetivo: determinar la prevalencia de parasitismo intestinal y la situacion nutricional en escolares y adolescentes de 6 a 18 anos matriculados en colegios oficiales y privados de la zona urbana de Tunja, Colombia...

  19. Adaptaciones curricularespara alumnos con baja visión e invidentes

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    Antonio RODRÍGUEZ FUENTES

    2009-11-01

    Full Text Available RESUMEN: El propósito del artículo es describir algunas adaptaciones curriculares de contexto, centro, aula e individuales para favorecer la integración de alumnos con baja visión e invidentes en el marco de una Escuela Inclusiva. Consciente de que la precisión disminuye en función de la jerarquía establecida: contexto, centro, aula y adaptaciones individuales (como no podía ser de otra manera dado que en ese orden aumenta el grado de singularidad y heterogeneidad de la población analizada; en definitiva, las necesidades educativas especiales se hacen más individuales y demandan una completa y compleja evaluación psicopedagógica, se presentan algunas pautas más o menos genéricas que pueden resultar útiles para la realización de la evaluación psicopedagógica, primero, y, segundo, para la determinación de propuestas de intervención escolares (adaptaciones.ABSTRACT: This paper is aimed to describe, in the framework of inclusive school, some curricular adaptation related both to context (school and classroom level and to pupil with low-vision or blindness. Been aware of needed herarchy in adapting curriculum top-down so that special educational needs become more and more individualized, some guidelines are displayed related to psychoeducational assessment and intervention in school context.RÉSUMÉ: Le but de l'article est de décrire certaines adaptations curriculaires de contexte, de centre, salle de classe et individuelles pour favoriser l'intégration d'étudiants malvoyant et aveugles dans le cadre d'une École Incluse. Conscient que la précision diminue en fonction de la hiérarchie établie: le contexte, le centre, la salle de classe et les adaptations individuelles (car elle ne pourrait pas être autre puisque dans cet ordre il augmente le degré de singularité et d'hétérogénéité de la population analysée; par conséquent, les nécessités éducatives spéciales sont rendues plus individuelles et exigent une

  20. Clásicos y modernos: dos adaptaciones literarias de Orson Welles

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    Molina Foix, Vicente

    2010-02-01

    Full Text Available The main purpose of this paper is to study the importance of Orson Welles as filmmaker in two different ways. Firstly, as regards his adaptations from Shakespeare’s texts. Among these Macbeth, focusing mainly on Jacques Tourner’s influence with his work I walked with a Zombie and the strategies used to build a film using fantastic terror clues. In the second part of the paper, Welles is studied in relation to his interest in Isak Dinesen’s work and his adaptation from The Inmortal Story.

    Se estudia la trayectoria cinematográfica de Orson Welles con especial referencia a las adaptaciones de las obras de Shakespeare y dentro de ellas Macbeth, destacando la influencia de Jacques Tourner con su obra Yo anduve con un Zombie y construyendo su obra con los parámetros del cine de terror fantástico. Se describe el interés de Wells por la obra de Isak Dinesen y su adaptación de Una historia inmortal.

  1. Las adaptaciones curriculares de pequeno porte o no significativas en el contexto brasileño

    Directory of Open Access Journals (Sweden)

    Eladio Sebastián Heredero

    2007-12-01

    Full Text Available La presente comunicación pretende conceptualizar qué se entiende por adaptaciones curriculares de pequeño porte dentro de la legislación brasileña, organizar todas las respuestas que a diferentes niveles pueden darse dentro de la escuela inclusiva que en estos momentos vivimos y además aportar ideas y estrategias concretas para organizar esta medida de atención a la diversidad de la manera más eficaz posible. A partir de la reflexión sobre el trabajo en el aula y de la experiencia vivida en contextos escolares brasileños2 sobre la base de una metodología de investigación acción se hacen las aportaciones técnicas para su desarrollo en los centros educativos y se dan estrategias concretas para su organización en las instituciones escolares. Por último, se pretende aportar un documento denominado DACI en el cual se recojan todas las medidas que para un determinado alumno o grupo se quieran hacer a fin de ajustar la respuesta educativa a las necesidades concretas por él planteadas en el contexto del aula y de la escuela.

  2. Parasitismo natural em moscas-das-frutas (Diptera: Tephritidae no semiárido do sudoeste da Bahia, Brasil

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    Ricardo Falcão de Sá

    2012-12-01

    Full Text Available Parasitoides são importantes agentes de controle natural de tefritídeos, e os conhecimentos sobre as relações tritróficas podem subsidiar o manejo destas pragas. Este trabalho objetivou estimar índices de parasitismo em moscas-das-frutas, em 21 espécies vegetais, e identificar as espécies de parasitoides associados, nas condições do semiárido do sudoeste da Bahia. Oito hospedeiros apresentaram infestação por Anastrepha spp. e, destes, em quatro, ocorreu parasitismo superior a 20,0%, sendo: 20,8% (Ziziphus joazeiro L.; 21,3% (Spondias tuberosa L.; 32,4% (Spondias purpurea L. e 57,1% (Malpighia emarginata L.. Os parasitoides coletados pertencem à família Braconidae, sendo 89% de Doryctobracon areolatus e 11% de Asobara anastrephae.

  3. Características del parasitismo intestinal en niños de dos comunidades del policlínico "XX Aniversario" Intestinal parasitism features in children from two communities of "XX Aniversario" Polyclinic

    Directory of Open Access Journals (Sweden)

    Gladys Antonia Cueto Montoya

    2009-03-01

    Full Text Available Dentro de las enfermedades infecciosas, aun en estos modernos tiempos, el parasitismo intestinal constituye un problema para países en vías de desarrollo y para los altamente desarrollados. Para caracterizar el parasitismo intestinal en niños de 1 a 12 años se realizó un estudio descriptivo transversal durante los meses de mayo a julio de 2007, en 2 comunidades, una suburbana del reparto "América Latina" y otra urbana del reparto "Virginia", ambas pertenecientes al área de salud del Policlínico "XX Aniversario", del municipio de Santa Clara. Se visitaron las viviendas y se aplicó encuesta a los padres para obtener datos al respecto. Fueron estudiados 243 niños de ambas comunidades, a quienes se les tomó muestras de heces fecales y región anal por el método de Graham. La frecuencia general de parasitismo fue de 65,8 %, mayor en los niños del reparto "América Latina", y las especies más frecuentes fueron Giardia lamblia y Enterobius vermicularis. Una inadecuada desinfección del agua, la presencia de vectores, comerse las uñas, la poca higiene después del contacto con animales, la presencia de estos en el hogar, no lavar las verduras, andar descalzos y el hacinamiento, fueron factores que favorecieron las parasitosis.Included in infectious diseases, yet at present times, intestinal parasitism is a problem for underdeveloped countries, and for those highly developed. To characterize intestinal parasitism in children aged 1 and 12, we carried out a cross-sectional descriptive study during May to July, 2007 in 2 communities, one suburban of "América Latina" parcel and other urban of "Virginia" parcel, both served by "XX Aniversario" Polyclinic of Santa Clara municipality. We visited homes and we applied survey to parents to obtain data in this respect. A total of 243 children ware studied in both communities, taking samples of feces and of anal region by Graham method. General frequency of parasitism was of 6,8 % greater in the

  4. Nuevos factores implicados en las adaptaciones fisiológicas y cardiacas de la gestación

    OpenAIRE

    Redondo Angulo, Ibon

    2016-01-01

    [spa] La gestación es un periodo en el que acontecen varios cambios fisiológicos. Los cambios metabólicos que acontecen en la primera mitad de la gestación (denominada anabólicos materna) consisten en una serie de adaptaciones que permitirán a la madre satisfacer la demanda fetal futura mediante el aporte de grandes cantidades de sangre, oxígeno y nutrientes en la segunda etapa posterior. Esta segunda etapa, la catabólica materna, incluye cambios fisiológicos que posibilitan el suministro de...

  5. Las adaptaciones audiovisuales de Valle-Inclán: La sintaxis de la producción

    OpenAIRE

    Prats Benavent, Juan José

    2010-01-01

    El trabajo de investigación realizado sobre las adaptaciones audiovisuales de la obra literaria de Valle-Inclán, es un estudio que tiene presentes las dificultades escénicas que supone la representación de su teatro, y cómo el nacimiento del cine pudo influir en dicha evolución. Valle-Inclán apuesta por la renovación escénica de principios del siglo XX, creando la dramaturgia más singular del teatro español de dicho periodo; con una producción de textos que muchas veces desbord...

  6. Nuevos factores implicados en las adaptaciones fisiológicas y cardiacas de la gestación

    OpenAIRE

    Redondo Angulo, Ibon

    2016-01-01

    [spa] La gestación es un periodo en el que acontecen varios cambios fisiológicos. Los cambios metabólicos que acontecen en la primera mitad de la gestación (denominada anabólicos materna) consisten en una serie de adaptaciones que permitirán a la madre satisfacer la demanda fetal futura mediante el aporte de grandes cantidades de sangre, oxígeno y nutrientes en la segunda etapa posterior. Esta segunda etapa, la catabólica materna, incluye cambios fisiológicos que posibilitan el suministro de...

  7. Adaptaciones musculares relacionadas a áreas corporales que participan activamente en el vuelo de Anhima cornuta (Aves: Anseriformes, Anhimidae)

    OpenAIRE

    2013-01-01

    La forma y correspondencia entre la anatomía muscular y ósea revela en gran medida el hábito locomotor de cualquier ave. Las especies pertenecientes a la Familia Anhimidae son relevantes dentro de las Aves, debido a las adaptaciones óseas (y por lo tanto, musculares) que presentan, como la pérdida de procesos uncinados, el desarrollo de espolones metarcapales, la extrema neumatización y el notable desarrollo de forámenes. Se analizaron anatómicamente y numéricamente (superficie de origen ...

  8. Caracterización clínico-epidemiólogica del parasitismo intestinal en niños de 0 a 5 años Clinical and epidemiological characterization of intestinal parasitism in children aged 0 to 5

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    Yisell Urquiza Yero

    2011-03-01

    Full Text Available Objetivo: realizar la caracterización clínico epidemiológica del parasitismo intestinal en niños de 0 a 5 años pertenecientes al consultorio médico Altos de Uslar, Libertador, Carabobo, Venezuela. Métodos: se realizó un estudio descriptivo, de corte transversal durante los meses de enero a diciembre de 2006, en el que se estudiaron 83 niños que presentaban sintomatología de parasitismo intestinal o no, a los que se les tomó muestras de heces fecales. La información se obtuvo a través de encuestas que se aplicaron a los tutores legales. Resultados: la frecuencia general de parasitismo fue de 67,48 %, con predominio del sexo masculino sobre el femenino; las especies más frecuentes fueron Ascaris lumbricoides y Enterobius vermicularis, y se identificó con poliparasitismo un 61,45 % de pacientes. Entre los factores que favorecieron las parasitosis se detectaron la presencia de vectores, los malos hábitos higiénicos sanitarios y la ingestión de agua no tratada. Conclusiones: predominó la edad de 5 años y el sexo masculino, así como, el poliparasitismo, las infecciones por helmintos, y las malas condiciones higiénico-sanitarias de las viviendas; y como principales factores de riesgo estuvo la presencia de vectores, la insuficiente higiene de las manos y los alimentos de consumo, así como la baja calidad sanitaria del agua.Objective: to carry out a clinical and epidemiological characterization of intestinal parasitism in children aged 0 to 5 from Altos de Uslar, Libertador, Carabobo, Venezuela medical consulting room. Methods: a cross-sectional and descriptive study was conducted from January to December, 2006 in 83 children presenting or not intestinal parasitism symptomatology in which cases feces samples were taken. Information was collected by surveys applied to legal protectors. Results: the general frequency of the parasitism was of 67,48 %, with predominance of male sex over the female one; the more frequent species were

  9. Prevención y control del parasitismo intestinal en la atención primaria de salud

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    Rebeca Margarita Laird Pérez

    2000-02-01

    Full Text Available Se valoró la capacidad técnica de Médicos Generales Integrales, técnicos del laboratorio de parasitología y epidemiólogos de las áreas de salud del municipio Centro Habana, de enero a abril de 1996, con el objetivo de evaluar la calidad de la atención primaria de salud para la prevención y control del parasitismo intestinal. Se aplicaron eneustas, controles de calidad externos, y entrevistas individuales a profundidad. Se encontró que no existe integración en las acciones de los grupos evaluados, detectándose dificultades médicas para la prevención y control de las parasitosis intestinales, deficiencias técnicas en los laboratorios y desconocimientos del programa de parasitismo intestinal por los epidemiólogos. Se recomienda la capacitación de técnicos y profesionales, y la confección de una metodología que permita reorientar y optimizar el programa nacional de parasitismo intestinalThe technical capacity of the General Comprehensive Physicians, parasitology laboratory technicians and epidemiologists from the health area of "Centro Habana" municipality was assessed from January to April, 1996, aimed at evaluating the quality of primary health care in relation to the prevention and control of intestinal parasitism. Surveys, external quality controls and individual interviews were made. It was found that there was no integration in the actions of the evaluated groups. Medical difficulties for the prevention and control of intestinal parasitosis as well as technical deficiencies in the laboratories were found. It was observed that epidemiologists had little knowledge about the program of intestinal parasitism. The training of technicians and professionals and the creation of a methodology that allows to reorient and optimize the national program of intestinal parasitism were recommended

  10. Influência da idade dos ovos de Helicoverpa zea (Boddie no parasitismo de Trichogramma pretiosum Riley Influence of egg age of Helicoverpa zea (Boddie on the parasitism by Trichogramma pretiosum Riley

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    Dirceu Pratissoli

    1999-05-01

    Full Text Available Entre os agentes de controle biológico, os parasitóides do gênero Trichogramma representam um dos mais importantes grupos, pois controlam diversas pragas na agricultura. Este trabalho teve por objetivo determinar a melhor idade dos ovos de Helicoverpa zea (Boddie para que Trichogramma pretiosum Riley tenha uma melhor eficiência no controle dessa praga. Ovos com um, dois, três e quatro dias foram oferecidos para o parasitismo, por um período de 24 horas a 25 ± 1ºC, umidade relativa de 70 ± 10% e fotofase de 14 horas. Ovos de um dia de idade apresentaram a maior taxa de parasitismo, viabilidade e número de descendentes por fêmea. A mais alta eficiência de T. pretiosum será alçancada no campo, quando for observado maior densidade de ovos de H. zea com, no máximo, dois dias de desenvolvimento embrionário.Among the agents of biological control, the parasitoids of the genus Trichogramma represent one of the most important groups, as they are able to control many pests in agriculture. The objective of this work was to determine the best age of the Helicoverpa zea (Boddie eggs so that the Trichogramma pretiosum Riley could have the best efficiency against this pest. One, two, three and four-days-old eggs were offered for the parasitism during 24 hours, at 25 ± 1ºC, relative humidity 70 ± 10% and photofase of 14 hours. One-day-old eggs showed the highest rates of parasitism, viability, and number of descendants for each female. The highest efficiency with T. pretiosum will be reached in the field conditions, when observed a great density of H. zea eggs until two days of embryonic development.

  11. Parasitismo de traça-das-crucíferas por Oomyzus sokolowskii Parasitism of diamondback moth by Oomyzus sokolowskii

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    Christian Sherley Araújo da Silva-Torres

    2010-07-01

    Full Text Available O objetivo deste trabalho foi avaliar a capacidade de parasitismo do parasitoide larval-pupal Oomyzus sokolowskii, submetido a diferentes densidades do hospedeiro traça-das-crucíferas (Plutella xylostella, em laboratório, casa telada e campo. Em laboratório e campo, O. sokolowskii foi exposto às densidades de 2, 4, 8 e 16 lagartas. Em laboratório, empregaram-se recipientes de 300 mL e, em campo, plantas de couve foram confinadas em gaiolas de organza (30x50 cm. Em casa telada, foram utilizadas microparcelas compostas por seis plantas de repolho infestadas com 25, 50, 85 ou 100 lagartas. O número de lagartas parasitadas aumentou de acordo com a densidade do hospedeiro e variou de 1,7 a 10,4, em laboratório, e de 0,61 a 7,0, em campo. Em casa telada, a maior taxa de parasitismo foi observada nas microparcelas com densidades mais elevadas do hospedeiro. O tempo de exposição aos parasitoides proporcionou maior taxa de parasitismo após 72 horas (24 horas, 52,4% e 72 horas, 80,7% independentemente da densidade. Oomyzus sokolowskii responde positivamente ao incremento na densidade de P. xylostella, embora a taxa de parasitismo permaneça constante independentemente da disponibilidade do hospedeiro.The objective of this work was to evaluate the parasitism capacity of the larval-pupal parasitoid Oomyzus sokolowskii submitted to different densities of the host diamondback moth, Plutella xylostella, in the laboratory, greenhouse and field. In the laboratory and in the field, O. sokolowskii was exposed to densities of 2, 4, 8 or 16 larvae. In the laboratory, 300 mL recipient were used, and in the field kale plants were placed in cages (30x50 cm. In the greenhouse, microparcels consisted of six cabbage plants each infested with 25, 50, 85 or 100 larvae. The number of parasitized larvae increased with host density and varied from 1.7 to 10.4 (laboratory and from 0.61 to 7.0 (field. In the greenhouse, parasitism rate was higher in microparcels with

  12. Alteraciones Inmunológicas en Niños con Enfermedad Diarreica Prolongada Y Parasitismo

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    Leticia de la Caridad Christian López

    1999-09-01

    Full Text Available Para valorar la relación entre la enfermedad diarreica prolongada, el parasitismo intestinal y las alteraciones del sistema inmune se realizó un estudio a 325 niños, entre 8 meses y 6 años de edad, de la Consulta de Inmunología, entre enero de 1993 y junio de 1997; a éstos se les efectuó cuantificación de inmunoglobulinas séricas (IgG, IgA IgM (n:157, la prueba cutánea de hipersensibilidad retardada con toxoide tetánico (n:60 y se midió el área tímica por ultrasonografía (n:108. De los pacientes con niveles bajos de inmunoglobulinas, el 77 % presentaba IgA deficiente. La prueba del toxoide tetánico demostró que el 85 % de los enfermos estudiados presentaban un déficit de inmunidad celular funcional y el 75 % del total de pacientes tenía área del timo disminuida y de ellos 42 (39 % mostraban atrofia severa de este órgano. Esto nos permite concluir que el déficit de inmunidad celular en estos casos es predominante, lo que permitió el empleo de una inmunoterapia adecuada325 children between 8 months and 6 years old that were attended at the Immunology Department were studied from January, 1993, to June, 1997, in order to evaluate the relationship existing between prolonged diarrheal disease, intestinal parasitism and the alterations of the immune system. Quantitation of serum immunoglobulins (IgG, IgA and IgM (n:157 was conducted. The skin test of delayed hypersensititvity with tetanus toxoid (n:60 was also carried out. The thymic area was measured by ultrasonography (n:108. Of the patients with low levels of immunoglobulins, 77 % presented deficient IgA. The tetanus toxoid test showed that 85 % of the patients studied had a deficit of functional cellular immunity, whereas 75 % of the total of patients had a diminished thymic area and of them 42 (39 % had severe atrophy of this orgam. This allows us to conclude that the deficit of cellular immunity predominates in these cases and that it is necessary to use an adequate

  13. Parasitismo natural em ovos crisopídeos Natural egg parasitism of chrysopids

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    Maria Alice de Medeiros

    2009-02-01

    Full Text Available Os predadores, em geral, apresentam hábitos generalistas e por isso podem ser usados em programas de controle biológico, em diferentes agroecossistemas. A sobrevivência dos predadores é afetada por diversos fatores, como, por exemplo, a presença de parasitóides. Este trabalho foi conduzido com os objetivos de identificar os parasitóides de crisopídeos, especialmente os parasitóides de ovos, e determinar o nível de parasitismo natural. As amostragens foram feitas na Embrapa Hortaliças, em campos de milho-doce, de setembro/1997 a fevereiro/1998. Os ovos de crisopídeos foram coletados semanalmente, sendo individualizados em cápsulas de gelatina até a emergência da larva e/ou do parasitóide. Foram coletados 800 ovos de crisopídeos, sendo que em 71% dos ovos, as larvas sobreviveram; 9% dos ovos foram considerados inviáveis e 20% foram parasitados por seis espécies de microhimenópteros. Destes, 57% foram parasitados por Telenomus sp. (Scelionidae, 32% por Trichogramma pretiosum (Trichogrammatidae, 6% por Oencyrtus chrysopae Crawford (Encyrtidae e 5% por Aprostocetus sp. (Eulophidae.Most predators, in general, have generalist habits and can be used as biological control agents in several crops. Predator survival is affected by several factors, such as occurrence of parasitoids. The main purpose of this research was to identify the parasitoids of chrysopids, especially egg parasitoids and their level of parasitism. The samples were taken in a sweet-corn field at Embrapa Hortaliças from September/1997 to February/1998. The chrysopids eggs were collected weekly and then individualized in gelatine capsules until larval or parasitoid emergency. A total of 800 eggs were collected. The predator emerged from 71% of the eggs, 9% were inviable eggs and the other 20% were parasitized by six species of microhymenopterans. Among these, 57% were parasitized by Telenomus sp. (Scelionidae, 32% were parasitized by Trichogramma pretiosum

  14. Efecto de la administración de antioxidantes orales en las adaptaciones al ejercicio físico.

    OpenAIRE

    2006-01-01

    RESUMEN Durante el ejercicio físico se producen radicales libres en el interior de la célula muscular. Éstos pueden actuar como señales reguladoras en diversas funciones fisiológicas del músculo, como por ejemplo su fuerza contráctil, su capacidad para generar ATP, etc Se sabe que el entrenamiento aeróbico empleando una determinada frecuencia, intensidad y duración, puede aumentar el contenido mitocondrial entre un 50% y un 100% en un período aproximado de seis semanas. E...

  15. Los Grupos Departamentales de Calidad en la UDC: marco para la adaptacion de la tutoria al EEES

    National Research Council Canada - National Science Library

    Rodicio-Garcia, Maria Luisa; Prieto-Vigo, Nuria

    2010-01-01

    ... de la labor tutorial que desarrollan. En una primera fase se pulsa la opinion del profesorado sobre diferentes cuestiones relacionadas con la tutoria en la Universidad, empleando una metodologia cuantitativa, concretamente a traves de un cuestionario elaborado ad hoc. Se establece un grupo experiencial (con profesorado que forma parte de GDC) y uno control (profesorado que no participa de la experiencia), y en ambos casos se indaga sobre su percepcion de la realidad de la tutoria y lo que consideran que debe...

  16. Parasitismo humano por Rhipicephalus sanguineus sensu lato (ACARI: IXODIDAE no Mato Grosso do Sul, Centro-Oeste do Brasil

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    Igor Cunha Lima Acosta

    2017-05-01

    Full Text Available O parasitismo humano pelo carrapato marrom do cão, Rhipicephalus sanguineus sensu lato (s. l., um importante parasita para a saúde pública e veterinária, é raramente relatado no continente americano. Este trabalho relata o registro de um macho de R. sanguineus s. l. parasitando um humano na cidade de Campo Grande, estado do Mato Grosso do Sul, no Centro-Oeste do Brasil. Essa observação é relevante para a saúde pública, uma vez que os carrapatos desse complexo são conhecidos como vetores de riquétsias do grupo da febre maculosa para cães e humanos.

  17. Parasitismo por Giardia sp. e Cryptosporidium sp. em Coendou villosus Parasitism by Giardia sp. and Cryptosporidium sp. in Coendou villosus

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    João Fabio Soares

    2008-04-01

    Full Text Available O objetivo deste trabalho foi verificar o possível parasitismo por Giardia sp. e Cryptosporidium sp. em amostras de fezes de ouriço-cacheiro (Coendou villosus. As amostras foram analisadas pelo método de centrífugo-flutuação com sulfato de zinco e apresentaram elevada infecção por cistos de Giardia sp. e por oocistos de Cryptosporidium sp., embora os animais não apresentassem sinal clínico decorrente disso.This research was aimed at verifing the possible parasitism by Giardia sp. and Cryptosporidium sp. in porcupine (Coendou villosus faeces samples. Samples were analyzed by the centrifugal-flotation method with zinc sulphate and showed high infection by cysts of Giardia sp. and by oocysts of Cryptosporidium sp., although the animals did not show any associated clinical sign.

  18. Primer reporte de parasitismo de una garrapata blanda del género Ornithodoros (Ixodida: Argasidae sobre Rhinella arenarum (Anura: Bufonidae en el departamento de Valle Fértil, San Juan, Argentina

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    Acosta, Juan Carlos

    2012-08-01

    Full Text Available El objetivo de la presente comunicación es reportar por primera vez un caso de parasitismo en Rhinella arenarum y a la vez mencionar el primer registro del género Ornithodoros en el departamento de Valle Fértil, San Juan, Argentina. Siendo el primer registro de parasitismo de anfibios por Ornithodoros en la Argentina y el segundo para el neotrópico.

  19. An evolutionary frame of work to study physiological adaptation to high altitudes Un marco conceptual para estudiar adaptaciones fisiológicas a altas altitudes

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    ENRICO L. REZENDE

    2005-06-01

    Full Text Available How complex physiological systems evolve is one of the major questions in evolutionary physiology. For example, how traits interact at the physiological and genetic level, what are the roles of development and plasticity in Darwinian evolution, and eventually how physiological traits will evolve, remains poorly understood. In this article we summarize the current frame of work evolutionary physiologists are employing to study the evolution of physiological adaptations, as well as the role of developmental and reversible phenotypic plasticity in this context. We also highlight representative examples of how the integration of evolutionary and developmental physiology, concomitantly with the mechanistic understanding of physiological systems, can provide a deeper insight on how endothermic vertebrates could cope with reduced ambient temperatures and oxygen availability characteristic of high altitude environments. In this context, high altitude offers a unique system to study the evolution of physiological traits, and we believe much can be gained by integrating theoretical and empirical knowledge from evolutionary biology, such as life-history theory or the comparative method, with the mechanistic understanding of physiological processesUna de las preguntas más importantes en fisiología evolutiva es como evolucionan los sistemas fisiológicos complejos. Por ejemplo, actualmente sabemos poco sobre la interacción entre varios rasgos a niveles genéticos y fisiológicos, sobre el papel de la plasticidad fenotípica durante distintas etapas del desarrollo y madurez para la evolución fisiológica dentro de un linaje. En este trabajo explicamos el marco conceptual ocupado por fisiólogos evolutivos en la actualidad para estudiar adaptaciones fisiológicas a nivel evolutivo y el papel de la plasticidad dentro de la evolución Darviniana. Citamos ejemplos de como la integración de la fisiología evolutiva y del desarrollo nos permitió un mayor

  20. Traduccion o adaptacion? Formulas para la creacion de cunas y spots en una campana publicitaria

    National Research Council Canada - National Science Library

    Bernadas-Sune, Dolors; Arcos-Foix, Nuria

    2012-01-01

    ... de mensajes persuasivos. Pese a ello, en la practica, el trasvase creativo se intuye cualitativa y cuantitativamente desequilibrado, y cuando uno se enfrenta al estudio de la publicidad radiofonica, a menudo tropieza...

  1. Parasitismo de ovos de Leptopharsa heveae Drake & Poor por Erythmelus tingitiphagus (Soares em plantios de seringueira com aplicação de produtos fitossanitários

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    Rodrigo Souza Santos

    2014-06-01

    Full Text Available O percevejo-de-renda Leptopharsa heveae Drake & Poor (Hemiptera: Tingidae é uma das principais pragas da heveicultura no Brasil, podendo causar prejuízos de até 30% na produtividade de látex. Seu controle é realizado principalmente com uso de produtos fitossanitários e uma das alternativas a seu uso seria a utilização de inimigos naturais. O parasitoide Erythmelus tingitiphagus (Soares (Hymenoptera: Mymaridae é um importante inimigo natural de L. heveae, por parasitar seus ovos em condições naturais. O objetivo deste estudo foi verificar a ocorrência e o parasitismo de E. tingitiphagus, em ovos de L. heveae, em talhões comerciais de cinco clones de seringueira onde se realizaram aplicações regulares de produtos fitossanitários, no município de Itiquira, MT. Semanalmente, entre agosto de 2006 a janeiro de 2007, foram coletadas aleatoriamente quatro folhas maduras em cinco árvores dos clones RRIM 600, PR 255, GT 1, PB 235 e PB 217. Na área de estudo, E. tingitiphagus ocorreu em todos os clones estudados, com pico populacional em outubro de 2006. A porcentagem de parasitismo nos diferentes clones variou de 13,8% no clone PB 235 a 30,8% no RRIM 600 e a porcentagem média de parasitismo foi de 24,2%. Os produtos fitossanitários, no método em que foram aplicados nos talhões, não atuaram negativamente no parasitismo de E. tingitiphagus.

  2. Influência da idade dos ovos de Oxydia vesulia no parasitismo de Trichogramma maxacalii Influence of the age of Oxydia vesulia eggs on parasitism by Trichogramma maxacalii

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    Harley Nonato de Oliveira

    2003-04-01

    Full Text Available Trichogramma é um dos gêneros de insetos mais importantes no controle biológico. Este trabalho avaliou o potencial de parasitismo de Trichogramma maxacalii em ovos de Oxydia vesulia, em diferentes estágios embrionários. Vinte e cinco ovos de O. vesulia, com um, três, cinco e sete dias de idade foram oferecidos a uma fêmea de T. maxacalii, em ensaio com 15 repetições, por um período de 24 horas. Não houve influência da idade dos ovos de O. vesulia na porcentagem de parasitismo, na viabilidade, na razão sexual e na porcentagem de fêmeas que parasitaram. Foram encontradas baixas taxas de parasitismo (de 6% a 10% de T. maxacalii em ovos de O. vesulia, embora mais de 70% das fêmeas desse parasitóide tenham realizado o parasitismo em ovos de até cinco dias de idade.Trichogramma is among the most important genus of biological control. This research evaluated the parasitism potential of Trichogramma maxacalii on eggs of Oxydia vesulia at different embryonic developmental stages. Twenty five eggs of O. vesulia one, three, five and seven days old were offered to the parasitoid in a fifteen replication essay, for a period of 24 hours. Parasitism rate, viability, sexual rate and females that parasited were not influenced by the age of O. vesulia eggs. Low parasitism rate of T. maxacalii in eggs of O. vesulia was found but more than 70% of the females of this parasitoid showed parasitism on eggs up to five days old.

  3. Adaptaciones ciceronianas en Noctes Atticae de Aulo Gelio

    OpenAIRE

    Cattán, Florencia

    2011-01-01

    En los capítulos de Noctes Atticae, Aulo Gelio alude al relato de sucesos referidos o experimentados por autoridades eruditas para señalar el “deber ser”. Con el objeto de erigirse a sí mismo como modelo, toma como ideal la figura de Cicerón, por su prestigio en materia oratoria y de lengua latina. Nos interesa examinar las estrategias empleadas al citar pasajes específicos del De Lege Agraria que resultan funcionales a los fines de la intencionalidad frente a su lector previsto: proporcionar...

  4. Dieta y parasitismo de Leptodactylus diptyx (Anura: Leptodactylidae del nordeste argentino Diet and parasitism of Leptodactylus diptyx (Anura: Leptodactylidae from Northeastern Argentina

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    Víctor Hugo Zaracho

    2012-12-01

    Full Text Available Diversos aspectos de la historia natural de especies del grupo Leptodactylus marmoratus son escasamente conocidos y la poca información existente aborda principalmente los de la biología reproductiva. El objetivo de este trabajo es aportar información acerca de la dieta y del parasitismo de poblaciones de Leptodactylus diptyx del nordeste argentino. Para el estudio trófico, se analizó el contenido estomacal e intestinal de 22 individuos adultos, mientras que para el estudio parasitario, se examinó el tubo digestivo de 40 individuos. Se registró un total de 91 presas, clasificadas en 17 categorías, entre los cuales los himenópteros formícidos fueron los más numerosos (45% y frecuentes (55%. Otras presas importantes fueron colémbolos, coleópteros y arañas. Los valores de diversidad de presas (índice de Shannon y amplitud del nicho (índice de Levins fueron 2.06 y 4.29, respectivamente. El 57.5% de los individuos examinados resultó positivo al examen de endoparásitos, entre los que se incluyen nematodos y acantocefalos. Leptodactylus diptyx representa un nuevo hospedador para los nematodos Cosmocerca sp. y Aplectana sp.The natural history of the Leptodactylus marmoratus species group is poorly known, and there is scarce available information mainly referred to aspects of the reproductive biology. The objective of this study was to contribute to the knowledge of the trophic biology and of the parasitism of Leptodactylus diptyx populations from Northeastern Argentina. The stomach and intestine contents of 22 adult individuals were analyzed for the trophic study, while the alimentary canal and body cavity of 40 individuals were examined for parasites. The diet consisted of 17 different prey items, including mainly Formicidae hymenopterans, collembolans, coleopterans, and spiders. The values of prey diversity calculated by Shannon's index (H' and niche amplitude by Levins's index were 2.06 and 4.29, respectively. The 57.5% of the

  5. Dieta y adaptaciones ecológicas de las poblaciones humanas del Pleistoceno Medio y Superior

    OpenAIRE

    Pinilla Pérez, Beatriz

    2012-01-01

    [spa] Durante el Pleistoceno Medio y Superior ocuparon Europa al menos tres poblaciones: los heidelbergensis, los neandertales y los humanos modernos. La economía de estas sociedades habría dependido en última instancia de los recursos vegetales y animales disponibles, que habrían variado según las oscilaciones climáticas a lo largo de los 600 Ka en que el continente fue ocupado de manera continua. La variación en la dieta implicaría un cambio en las estrategias de subsistencia que podrían ha...

  6. Adaptaciones musculares relacionadas a áreas corporales que participan activamente en el vuelo de Anhima cornuta (Aves: Anseriformes, Anhimidae

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    Marcos Antonio Manzanares

    2013-04-01

    Full Text Available La forma y correspondencia entre la anatomía muscular y ósea revela en gran medida el hábito locomotor de cualquier ave. Las especies pertenecientes a la Familia Anhimidae son relevantes dentro de las Aves, debido a las adaptaciones óseas (y por lo tanto, musculares que presentan, como la pérdida de procesos uncinados, el desarrollo de espolones metarcapales, la extrema neumatización y el notable desarrollo de forámenes. Se analizaron anatómicamente y numéricamente (superficie de origen e inserción, longitud en reposo y masa los componentes musculares relacionados a las zonas de la columna vertebral, tronco, miembros y cinturas de tres ejemplares de Anhima cornutade distintos sexos y se compararon con lo estudiado en 4 ejemplares de especies relacionadas (Dendrocygna bicolory Dendrocygna viduata, Anatidae. El estudio reveló que en Anhima existe un gran desarrollo de los músculos intercostales e intervertebrales (torácicos y lumbares, evidenciando una adaptación a la ausencia de procesos uncinados. En Anhimaexisten fascículos proporcionalmente menos pesados y de menor tamaño que en Dendrocygna, indicando morfológicamente la ocurrencia de un vuelo menos desarrollado en el primero. Algunos tendones y fibras musculares metacarpales cuya inserción ocurre en el primer dígito en Dendrocygna, en Anhimase insertan en la base de los espolones proximal y distal, demostrando el poco control del vuelo en Anhima. La musculatura de los miembros posteriores en Anhimaes mucho más desarrollada, tanto en tamaño, como en masa proporcional, evidenciando una gran actividad en esta zona en la propulsión del vuelo y en hábitos terrestres

  7. Nuevas traducciones de Galdos. Adaptaciones de los Episodios Nacionales (New Adaptations of Galdos. Episodios Nacionales

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    Navarrete-Galiano Rodríguez, Ramón

    2012-12-01

    Full Text Available Resumen: La película Sangre de Mayo, de José Luis Garci, y la obra teatral Puerta del Sol: un Episodio Nacional, de Juan Carlos Pérez de la Fuente, son la adaptación de las novelas de Benito Pérez Galdós, Trafalgar, La corte de Carlos IV y El 19 de marzo y el 2 de mayo. Estos trabajos cinematográficos y teatrales muestran como se traduce el lenguaje narrativo al fílmico. La adaptación de Garci y Pérez de la Fuente es una nueva forma de conocer los procesos para traspasar una idea literaria al guión cinematográfico. Abstract: The film Sangre de Mayo, by José Luis Garci and the play Puerta del Sol: un Episodio Nacional, by Juan Carlos Pérez de la Fuente, are adaptations of the novels of Benito Pérez Galdós (Trafalgar, La corte de Carlos IV, El 19 de marzo y el 2 de mayo. These cinematics and theatrical works demonstrates how to render narrative language in the language of film. Garci´s and Pérez de la Fuente´s adaptations offers a new way of discovering the process of moving from a literary idea to a screenplay.

  8. Relación entre las adaptaciones curriculares individuales y la percepción del clima social en las aulas de inglés de 2º y 4º de secundaria en un centro privado de Madrid

    OpenAIRE

    Fulgueiras-Martínez, Lucía

    2016-01-01

    El objetivo general de este trabajo es realizar un estudio sobre la relación entre la presencia de alumnos con adaptaciones curriculares individuales y la percepción del clima escolar en las aulas de inglés de 2º y 4º de Educación Secundaria Obligatoria (ESO) en un centro privado de Madrid La metodología que se seguirá en este trabajo consta de tres partes. En primer lugar, se realizará una revisión bibliográfica sobre las Adaptaciones Curriculares Individuales (ACI) y las formas más habit...

  9. Jefatura masculina en hogares monoparentales: adaptaciones de los hombres a las necesidades de sus hijos

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    Andrés Mauricio Cano Rodas

    2016-01-01

    Full Text Available Actualmente dentro de la diversidad familiar, los hogares monoparentales con jefatura masculina constituyen un fenómeno emergente. Este tipo de hogares se conforman de manera particular y, a la vez, generan nuevos retos ante las transformaciones de la sociedad de hoy. El objetivo de este artículo es presentar algunos resultados de una investigación de corte cualitativo, realizada en Bogotá en el 2014, en la que se indagó a padres pertenecientes a hogares monoparentales con jefatura masculina sobre los cambios y los significados de lo que para ellos constituyen la paternidad y la masculinidad, a través de la aplicación de entrevistas en profundidad. En esta investigación se identificaron algunos significados de ser padre en cuanto a roles de proveedor económico, cuidador, agente de socialización y transmisor de valores y costumbres para sus hijos; además los padres entrevistados evidenciaron nuevas lecturas frente a experiencias del pasado en sus vidas, especialmente en lo que se refiere a la relación con sus propios progenitores. Los resultados de las entrevistas permitieron visibilizar un cuestionamiento sobre la masculinidad hegemónica en cuanto a la dinámica de las relaciones afectivas y la comunicación dentro del hogar, así como las redes de apoyo con las que cuentan. Se evidenció además una considerable modificación del estilo de vida de los padres, en cuanto a su dimensión profesional, laboral, social y de esparcimiento personal con sus amigos, que se adapta esencialmente a las necesidades de sus hijos*. La experiencia de la jefatura de un hogar monoparental ha llevado a los padres entrevistados a modificar el ejercicio de su masculinidad en lo que tiene que ver con su comunicación, sus relaciones, la manera de expresar el afecto y el desempeño cotidiano con sus hijos, aceptando el nuevo rol familiar, al asociarlo con la responsabilidad de la crianza y el cuidado de los mismos. Las necesidades de los hijos en los

  10. Aspectos anatomopatológicos do parasitismo por nematódeos da superfamília Filarioidea em capivaras (Hydrochoerus hydrochaeris de vida livre no Centro-Oeste brasileiro

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    Lorena F. Silva

    2015-02-01

    Full Text Available São descritos dois casos de parasitismo por Cruorifilaria tuberocauda em capivaras de vida livre no Distrito Federal, Brasil. Macroscopicamente, observou-se nas superfícies de corte dos rins espessamento acentuado de vasos das regiões cortical e córtico-medular. Microscopicamente, havia arterite proliferativa e granulomatosa acentuada associada a filarídeos intralesionais consistentes com Cruorifilaria tuberocauda. Esse é o primeiro relato do parasitismo por esse filarídeo em capivaras no Distrito Federal

  11. Parasitismo intestinal y malnutrición en niños residentes en una zona vulnerable de la ciudad de Santa Marta, Colombia.

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    Sonja Liliana Lozano Socarras

    2013-10-01

    Full Text Available ResumenLas infecciones parasitarias intestinales son un problema importante de salud pública en Colombia. La exposición temprana y frecuente a enteroparásitos se ha relacionado con retardo en el crecimiento y desarrollo psicomotor y cognitivo de los niños; además, las larvas de nematodos pueden migrar a órganos vitales como hígado, pulmón, ganglios linfáticos y cerebro ocasionando lesiones en estos. El presente estudio tuvo como propósito establecer la frecuencia de parasitismo intestinal y malnutrición en una población de 392 niños con edades entre 3 y 5 años, residentes en tres barrios subnormales de la ciudad de Santa Marta. Para evaluar la condición nutricional de los niños, se midieron los índices antropométricos peso para la edad (RPE y talla para la edad (RTE. La frecuencia de parásitos intestinales fue del 55,1% (216/392, los parásitos con potencial patogenicidad fueron Entamoeba histolytica (19,9%, Giardia duodenalis (12,7%, Blastocystis hominis (11,7%, y Áscaris lumbricoides (10,7%. El poli-parasitismo estuvo presente en el 17,3% de la población (65/392. La malnutrición aguda se observó en el 41,8% y la crónica en el 30,1% de los niños. Se encontró una asociación estadísticamente significativa entre las parasitismo general y la RPE (p= 0,0235, pero la correlación entre el parasitismo y la RTE no fue significativa (p= 0,11. El presente resultado demuestra que la frecuencia de infecciones por parásitos intestinales es alta en la población infantil vulnerable de Santa Marta, no obstante, no es posible asegurar que exista una relación causa-efecto entre el parasitismo y el déficit nutricional. (DUAZARY 2010, 205 - 210AbstractThe intestinal parasitic infections are an important public health problem in Colombia. The early and frequent exposure to the enteroparasites has been related with delay growth and delay psychomotor and mental development of children; in addition, the nematodes larvae can migrate to

  12. Parasitism of Rhizoctonia solani by strains of Trichoderma spp. Parasitismo de Rhizoctonia solani por linhagens de Trichoderma spp.

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    Itamar Soares de Melo

    2000-03-01

    Full Text Available Rhizoctonia solani causes serious diseases in a wide range of plant species. The fungus Trichoderma has been shown to be particularly effective in the control of the pathogen. Thus, this research was carried out to screen fourteen Trichoderma strains against R. solani in vitro. All strains tested inhibited the growth of R. solani. Three T. koningii strains produced toxic metabolites with strong activity against R. solani, inhibiting the mycelial growth by 79%. T. harzianum, Th-9 reduced the viability of sclerotia of R. solani by 81.8% and T. koningii, TK-5 reduced by 53%. Electron microscopic observations revealed that all T. harzianum strains interacted with R. solani. Th-9 grew toward and coiled around the host cells, penetrating and destroying the hyphae. Penetration of host cells was apparently accomplished by mechanical activity.Rhizoctonia solani é um dos mais destrutivos patógenos de plantas cultivadas. Métodos alternativos de controle têm sido empregados com sucesso, particularmente, utilizando-se o fungo Trichoderma. Este trabalho visou, portanto, selecionar linhagens efetivas desse micoparasita contra o patógeno. Onze linhagens de T. harzianum e três de T. koningii foram testadas in vitro com relação ao parasitismo de hifas e de escleródios e produção de metabólitos tóxicos. Todas as linhagens de Trichoderma spp. inibiram o crescimento miceliano de R. solani e as três linhagens de T. koningii produziram potentes antibióticos, que inibiram mais de 79% o crescimento do patógeno. Uma linhagem de T. harzianum, Th-9, reduziu a viabilidade dos escleródios em 81,8% e uma de T. koningii em 53%. Microscopia eletrônica de varredura revelou que todas as linhagens de T. harzianum parasitaram R. solani enquanto nenhuma linhagem de T. koningii interagiu com R. solani, possivelmente, devido à forte inibição causada pelos metabólitos que impediu o contato entre os dois fungos. T. harzianum, Th-9, cresceu ao redor, penetrou e

  13. Parasitismo larval de Crocidosema (=Epinotia aporema (Lepidoptera: Tortricidae en el noreste de la provincia de Buenos Aires (Argentina Larval parasitism of Crocidosema (=Epinotia aporema (Lepidoptera: Tortricidae in north-eastern Buenos Aires province (Argentina

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    Gerardo Liljesthröm

    2005-07-01

    Full Text Available En la interacción huésped-parasitoide las plantas suelen emitir señales capaces de aumentar la eficiencia de los parasitoides. Las larvas de Crocidosema (=Epinotia aporema (Walsingham se alimentan endofíticamente de leguminosas herbáceas y constituyen una plaga de la soja (Glycine max Merrill. En este estudio analizamos el parasitismo larval de C. aporema en Melilotus albus Medikus, Galega officinalis L, Lupinus albus L y G. max, en el noreste de Buenos Aires. La densidad larval fue mayor en L. albus (109,2 larvas/m² que en las restantes leguminosas: 3,7; 6,9 y 11,3 en M. albus, G. officinalis y G. max, respectivamente. Sin embargo, el parasitismo y número de especies parasitoides fueron menores en L. albus (9,5% por el ectoparasitoide generalista Bracon sp. que en M. albus (32,6%, Bracon sp. y los endoparasitoides Trathala sp.y Bassus sp.; G. officinalis y G. max (26,4% y 50,6% respectivamente, con Trathala sp. y Bracon sp. en ambas. Lupinus albus fue la única especie vegetal que reaccionó a la alimentación de C. aporema con producción de exudados pegajosos y olorosos que podrían haber repelido los endoparasitoides, actuando como un refugio parcial para C. aporema. Además, al ser positivamente seleccionada por C. aporema, esta leguminosa podría utilizarse como franja trampa para su control en cultivos de soja, de manera compatible con tácticas de control biológico por conservación de enemigos naturales.In host-parasitoid interactions, parasitoid efficiency may be increased by different quantity and quality of plant signals. Crocidosema (=Epinotia aporema (Walsingham is a pest on soybean, with larvae feeding endophitically on various herbaceous leguminosae. In this study we analyzed larval parasitism of C. aporema on Melilotus albus Medikus, Galega officinalis L, Lupinus albus L and Glycine max Merrill in the north-east of the Buenos Aires province. Larval density was higher on L. albus (109,2 larvae/m², than on the other

  14. Gall midge attack intensity and host-plant response in a Neotropical coastal ecosystem Intensidade do parasitismo de inseto galhador e resposta da planta hospedeira em um ecossistema neotropical costeiro

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    Pedro de Araujo Lima Constantino

    2009-01-01

    intensidade de galhas nas folhas de Clusia lanceolata, e a extensão do impacto de galhas em folhas adjacentes não-galhadas. Analisamos o efeito do número de galhas sobre a área foliar, biomassa, área específica e aparência foliar de 509 folhas de 14 indivíduos. Os resultados indicaram que diferenças individuais entre plantas, nos pares de folhas e na presença de galhas, foram responsáveis por mais de 90% de variação entre folhas infestadas. A variação na intensidade de parasitismo criou diferenças de resposta foliar. Sob ataque moderado, caracterizado pela presença de galhas esparsas nas folhas, o aumento do número de galhas provocou o aumento de biomassa e área foliar e a diminuição da área específica. A área específica também foi menor sob ataque de alta intensidade, caracterizado por galhas unidas. Nos casos de parasitismo extremo, as folhas galhadas tornaram-se deformadas, apresentando a superfície foliar severamente reduzida. A deformação das folhas geradas pela presença de galhas provocou abscisão precoce, indicada pelos 90% de folhas deformadas encontradas apenas nos pares mais jovens de folhas. Não houve evidencias suficientes que indicassem o impacto das galhas em parâmetros morfo-fisiológicos além das folhas atacadas, já que folhas não galhadas não sofreram alterações quando opostas a folhas galhadas.

  15. Adaptaciones cinemáticas, cinéticas y antropométricas tras un entrenamiento de corta duración con arrastres de trineo en atletas entrenados

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    Pedro E. Alcaraz Ramón

    2009-01-01

    Full Text Available Introducción El objetivo del presente trabajo fue estudiar las adaptaciones cinemáticas, cinéticas y antropométricas tras un entrenamiento de 4 semanas con arrastres de trineo en la fase de aceleración y de máxima velocidad del sprint, en atletas entrenados. Método 8 mujeres y 14 hombres de nivel nacional divididos en 2 grupos realizaron una fase inicial de 3 semanas de familiarización, integradas por 2 sesiones de entrenamiento de musculación, combinado con otras 2 sesiones de entrenamiento de velocidad y saltos. Tras esta fase, y después de dividir aleatoriamente la muestra en 2 grupos denominados grupo experimental (GE y grupo control (GC, se realizó una segunda fase de 4 semanas de entrenamiento diferenciado formado por 2 sesiones semanales de velocidad y saltos, 1 sesión de regeneración y 2 sesiones de musculación. La única diferencia en el entrenamiento fue que el GE realizaba las series de velocidad arrastrando un trineo que producía el 7,5% de pérdida de la máxima velocidad. Al inicio y al final de las 4 semanas de entrenamiento específico, los atletas realizaron los siguientes test: sprints de 15 m, 30 m y 50 m; test de salto vertical: salto en sentadilla a 90º (SJ y 120º (SJM, salto con contramovimiento (CMJ y salto con caída de 50 cm (DJ; 1-RM y potencia (POW al 30%, 45%, 60%, 70% y 80% de 1-RM en media sentadilla; y fuerza isocinética concéntrica (FIC de los flexores y extensores de la cadera a velocidades de 60º· s-1, 180º· s-1, 270º· s-1 y 450º· s-1. Se realizó un estudio fotogramétrico de la técnica de carrera en la fase de aceleración (AC y de la fase de máxima velocidad (MAX. También se ealizó un estudio antropométrico. Para conocer las diferencias intra-grupos se realizó un T-test para muestras relacionadas. Para determinar las diferencias inter-grupos se realizó un T-test para muestras independientes (p 0,05. Resultados En el GE se observaron diferencias estad

  16. Doença de Chagas congênita: avaliação imunocitoquímica do parasitismo em tecidos de feto macerado

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    Ana Maria A. Lana

    1986-06-01

    Full Text Available O método imunocitoquímico de peroxidase anti-peroxídase é aplicado, pela primeira vez, em tecidos de natimorto macerado de II-III graus para coloração específica de amastigotas do Trypanosoma cruzi, em caso de doença de Chagas congênita. Os resultados mostram que o encontro de ninhos de amastigotas é muito facilitado pelo método, mesmo em tecidos autolisados, onde a morfologia dos parasitas geralmente se mostra muito alterada; o método é recomendável, também nestes casos, para a avaliação mais precisa da intensidade do parasitismo.

  17. PARASITISMO SOBRE Eurysacca melanocampta Meyrick (LEPIDOPTERA: GELECHIIDAE EN DOS LOCALIDADES DE CUSCO, PERÚ PARASITISM ON Eurysacca melanocampta Meyrick (LEPIDOPTERA: GELECHIIDAE IN TWO LOCALITIES AT CUSCO, PERÚ

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    Juan F. Costa

    2009-06-01

    Full Text Available El cultivo de quinua (Chenopodium quinoa es una importante actividad económica en Cusco. La polilla Eurysacca melanocampta (Lepidoptera: Gelechiidae es la principal plaga registrada en este cultivo y presenta varios controladores biológicos. Se registran parasitoides y porcentajes de larvas parasitadas de la polilla de la quinua provenientes de dos localidades de Cusco: Izcuchaca (3400 msnm y Quiquijana (3100 msnm. Las larvas colectadas se criaron en laboratorio hasta la emergencia de los parasitoides adultos. Phytomyptera sp (Diptera: Tachinidae fue la principal especie parasitoide con 19,8% de parasitismo de larvas provenientes de ambas localidades. Braconidae (Hymenoptera, incluyendo Apanteles sp y Earinus sp, representó el 27,8% y Diadegma spp (Hymenoptera: Ichneumonidae el 5,6%. Braconidae presentó mayor porcentaje de parasitismo en Quiquijana que en Izcuchaca. Se discute el efecto de la diversidad de plantas asociadas, cultivadas y silvestres, sobre las poblaciones de insectos parasitoides.Quinoa crop (Chenopodium quinoa is an important economic activity at Cusco. The quinoa moth: Eurysacca melanocampta (Lepidoptera: Gelechiidae is the main insect pest recorded from Cusco in quinoa fields and it has a complex of natural enemies. This research reports parasitoid insects and percentage of parasitized larvae of quinoa moth from two localities of Cusco: Izcuchaca (3400 masl and Quiquijana (3100 masl. Collected larvae were reared at room conditions up to emergence of adult parasitoids. Phytomyptera sp (Diptera: Tachinidae was the main parasitoid with 19,8% of parasitized larvae from both localities. Braconidae (Hymenoptera, including Apanteles sp y Earinus sp, accounted for 27,8% and Diadegma spp (Hymenoptera: Ichneumonidae the 5,6%. Braconidae showed a greater percentage of parasitism at Quiquijana than Izcuchaca. We discuss if diversity of associated plants, both cultivated and wild plants, influence parasitoid populations.

  18. Methodologia para el analisis detallado de accidentes de transito en paises en desarrollo. Adaptacion y applicacion al caso de los motociclistas en Bogota

    OpenAIRE

    JIMENEZ-FLOREZ, Adriana

    2014-01-01

    De acuerdo con datos del Banco Mundial del 2010, hay en promedio en el mundo 176 vehículos automotores por 1.000 habitantes, sin incluir la motocicleta. Más allá de sus beneficios en términos de movilización de pasajeros y de bienes, el transporte motorizado le ha generado externalidades a la humanidad siendo los siniestros viales el mayor ejemplo de externalidad. Los siniestros viales son clasificados en medicina forense como una categoría de muerte violenta generada por lesiones de causa ex...

  19. Adaptation of existent thermal park to the new regulatory frame sustainable; Adaptacion del parque termico existente al nuevo entorno regulatorio sostenible

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Alvarez, L.

    2010-07-01

    In the last decade 2000-2010), both energy demand and peak capacity needs have experienced an important increase. Moratorium on new nuclear units and the reduced potential for new hydro projects have led to new installed capacity being basically covered by thermal power plants. Also in these latest years, the regulatory frame has developed different initiative destined to get a more environmentally sustainable energy sector. to name a few, the strong support to renewable energy, the drastic reduction in acid emissions to atmosphere (NO{sub x}, SO{sub x} and particulate matter) and carbon emissions reduction policies have had a great impact on operation profiles and requirements on thermal plants, leading to investment on new equipment and on the existing assets. Along this period, electric utilities have added these sustainability criteria to the development and management of their thermal portfolio, taking some decisions that have shaped the current generation map in Spain. Nonetheless, in the short and mid term, utilities are facing new challenges such as greater operation flexibility to allow the increasing market share of non-manageable energies or the applicability of more ambitious goals in the global reduction of acid an carbon emissions. (Author)

  20. Parasitismo em humano por Amblyomma sp (Acari: Ixodidae, na cidade de Recife, estado de Pernambuco Parasitism by Amblyomma sp (Acari: Ixodidae in humans in the city of Recife, state of Pernambuco, Brazil

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    Rafael Antonio do Nascimento Ramos

    2010-10-01

    Full Text Available INTRODUÇÃO: Os ixodídeos pertencentes ao gênero Amblyomma são encontrados no Brasil, sendo de grande importância em Saúde Pública por representarem risco na transmissão de patógenos. MÉTODOS: Este trabalho relata um caso de parasitismo em humano por Amblyomma sp, ocorrido na Cidade de Recife, Pernambuco. RESULTADOS: O parasitismo foi observado em uma senhora onde os ectoparasitos encontravam-se fixados em suas pernas e pés. CONCLUSÕES: Este tipo de achado é incomum e constitui o primeiro relato do parasitismo em humano por Amblyomma sp, no Estado de Pernambuco.INTRODUCTION: The Amblyomma genus is widely distribution in Brazil and is important regarding the public health risk represented by the transmission of pathogens. METHODS: This paper reports a case of parasitism in humans by Amblyomma sp that occurred in the City of Recife, State of Pernambuco. RESULTS: Parasitism was observed in a woman where the ticks were attached to her legs and feet. CONCLUSIONS: This finding is unusual and is the first report of parasitism in humans by Amblyomma sp in State of Pernambuco.

  1. Adaptaciones morfológicas foliares en tomate cultivado en bioespacio de techo retráctil con clima cálido Morphological leaf adaptations in tomato grown in warm retractable-roof bio-space

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    Jorge Berni Medina Medina

    2012-02-01

    Full Text Available Se analizaron las condiciones microclimáticas y la morfologíafoliar de tomate indeterminado de dos bioespacios: invernadero de techo retractil y casa sombra en Culiacán, Sinaloa, México; durante el periodo 2009 a 2010. Los resultados muestran que el invernadero de techo retractil, genera condiciones más favorables para la fotosíntesis, como resultado de una menor fluctuación térmica al interior de este bioespacio, en comparación con el ambiente impuesto por la casa sombra. Las temperaturas extremas (máximas y mínimas al interior del invernadero de techo retractil, se mantuvieron en un rango significativamente menor y por lo tanto, más favorable para la producción y la estabilidad reproductiva de tomate en el clima cálido de Culiacán, en comparación con casa sombra. Lo anterior fue corroborado por la magnitud de las variables morfológicas foliares analizadas y las diferencias detectadas entre foliolos desarrollados en ambos casos. Los valores de índice de área foliar, grosor de hoja, longitud del parénquima en empalizada y presencia de doble parénquima empalizada, observados en plantas desarrolladas en invernadero de techo retractil, superaron significativamente a los valores observados en casa sombra. Los resultados permiten concluir que los mayores rendimientos de tomate reportados recientemente para invernadero de techo retractil en climas cálidos, se deben en gran parte a la mayor eficiencia fotosintética, que resulta de las modificaciones y adaptaciones morfológicas foliares al microclima impuesto por el invernadero de techo retractil. Estos resultados apoyan la visión del manejo agronómico innovador, para la búsqueda por acondicionarlos espacios para la expresión de la vida. El concepto científico de bioespacio para la producción vegetal bajo sistemas de agricultura protegida, es fundamental para proponer medidas de adaptación ante el cambio climático.Microclimatic conditions and indeterminate tomato leaf

  2. Parasitism of Tuta absoluta in tomato plants by Trichogramma pretiosum Riley in response to host density and plant structures Parasitismo de Tuta absoluta por Trichogramma pretiosum Riley em resposta a densidade do hospedeiro e estruturas da planta

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    Cristina Arantes Faria

    2008-09-01

    Full Text Available One important factor determining the efficacy of parasitoids is the way they exploit different host patch. This study evaluated the response of females of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae to the oviposition sites of Tuta absoluta (Meyrick (Lepidoptera: Gelechiidae on processing tomato plants. In fully developed caged tomato plants T. absoluta moths were released, followed by the release of T. pretiosum females 12h later. After 24h of parasitoid release, the moth oviposition sites were mapped according to the plant canopy, and levels of parasitism assessed. The parasitism rate varied from 1.5 to 28%. There was not influence of plant structures on parasitism, except for the absence of parasitism on the plant apex. Levels of both T. absoluta oviposition and parasitism by T. pretiosum were higher on the upper third of the plant, decreasing downward along the plant canopy.Um dos fatores que podem determinar a eficácia de parasitóides é como esses agentes de controle biológico exploram o habitat de seus hospedeiros. Este estudo avaliou a resposta de fêmeas de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae à oviposição da praga Tuta absoluta (Meyrick (Lepidoptera: Gelechiidae em tomate industrial. Mariposas de T. absoluta foram liberadas em gaiolas contendo plantas de tomate e, após 12h, foi realizada a liberação de fêmeas de T. pretiosum. Após 24h da liberação do parasitóide, a oviposição da praga foi mapeada de acordo com as estruturas no dossel da planta de tomate e, posteriormente, foram determinados os níveis de parasitismo. O parasitismo de ovos da praga variou de 1,5 a 28%. Não houve influência significativa das estruturas da planta na taxa de parasitismo dos ovos da praga, exceto pela ausência de parasitismo na parte apical da planta. Ambos os níveis de oviposição de T. absoluta e parasitismo por T. pretiosum foram maiores no terço superior da planta de tomate.

  3. La atención a la diversidad y las adaptaciones curriculares en la normativa española

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    Grau Rubio, Claudia; Fernández Hawrylak, María

    2008-01-01

    El término adaptación curricular se introduce en España con la L.O.G.S.E. (1990) y tiene su base en el informe Warnock. Sustituye al P.D.I. (Programa de Desarrollo Individual) utilizado desde el Plan Nacional de la Educación Especial (1978). La adaptación curricular, como ¿adaptación de la enseñanza¿ tiene como objetivo adecuarla a las peculiaridades y necesidades de cada alumno. La adaptación se realiza desde un currículo común y flexible, y es un concepto ligado al de atención a la diversid...

  4. Adaptacion de una bateria para la evaluacion de prerrequisitos para el aprendizaje de la Estadistica en Psicologia.

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    Guàrdia Olmos, Joan; Peró, Maribel; Mancho-Fora, N.; Farràs-Permanyer, L.

    2012-01-01

    Las investigaciones recientes sobre docencia universitaria en Estadística se han centrado en identificar las principales variables que afectan al rendimiento académico. El objetivo de este estudio es analizar las propiedades psicométricas de cuatro cuestionarios (SAS, SATS, MSES-R, PMP) presentados como una batería de prerrequisitos para el aprendizaje de la Estadística, y por tanto potenciales predictores del rendimiento. Método: La batería se administró a una muestra de 96 estudiantes del G...

  5. Reação de genótipos de milho ao parasitismo de Meloidogyne incognita raça 1 e a M. paranaensis = Reaction of corn genotypes to parasitism from Meloidogyne incognita breed 1 and M. paranaensis

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    Ricardo Michael Levy

    2009-10-01

    Full Text Available O uso de híbridos e genótipos de milho resistentes aos nematóides formadores de galhas em sistemas de rotação de culturas mantém sua população em níveis baixos, diminuindo as perdas e possibilitando, posteriormente, o uso de genótipos mais suscetíveis. No presentetrabalho, foi avaliada a resistência de 18 genótipos de milho ao parasitismo de M. paranaensis e a M. incognita raça 1 em casa-de-vegetação. As plantas foram inoculadas com 5.000 ovos e eventuaisjuvenis dos respectivos nematóides. O delineamento utilizado foi inteiramente ao acaso, com dez repetições para cada tratamento com os nematóides e cinco repetições para a testemunha sem inoculação. Também foi realizada a técnica de coloração das raízes com fucsina ácida, pelo método de Byrd et al. (1972. Sessenta dias após a inoculação, os sistemas radiculares foram coletados, lavados e avaliados quanto à penetração, produção de ovos e estimativa do Fator de Reprodução (FR. Os resultados mostraram que, para M. paranaensis, o FR variou de 0,01 a 0,08;para M. incognita, a variação foi de 0,01 a 0,03, mostrando que todos os genótipos se comportaram como resistentes, apresentando FR The use of corn hybrids and genotypes resistant to root-knot nematodes in crop rotation systems reduce the population of nematodes, preventing losses and allowing for the use of more susceptible genotypes. In this study, the resistance of eighteen hybrids of corn to parasitism of Meloidogyne paranaensis and M. incognita breed 1 were evaluated in a greenhouse. The plants were inoculated with 5,000 eggs and possible juveniles of each nematode in a completely randomized design, using ten replicates for eachtreatment with nematodes, and five replicates for the treatment without inoculation (control. The root staining technique using acid fuchsin was also applied, according to Byrd et al. (1972. Sixty days after the inoculation, the roots systems were collected, washedand evaluated

  6. Lesões pulmonares associadas ao parasitismo por Sebekia oxycephala (Pentastomida em jacarés-açu (Melanosuchus niger Spix, 1825 oriundos de vida livre na Amazônia brasileira

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    Adriana Maciel de C. Cardoso

    2014-10-01

    Full Text Available O presente estudo objetivou descrever as lesões pulmonares macro e microscópicas associadas ao parasitismo por Sebekia oxycephala em 100 espécimes de jacarés-açu (Melanosuchusniger, abatidos na Reserva de Desenvolvimento Sustentável Mamirauá, situada no Estado do Amazonas, Brasil. Durante a avaliação macroscópica, exemplares dos parasitos encontrados no tecido pulmonar foram coletados individualmente em AFA (Álcool etílico - Formalina - Ácido acético glacial e formol a 5% para avaliação parasitológica e classificação taxonômica. Amostras de tecido pulmonar de todos os animais, independentemente da ocorrência de lesões macroscópicas, foram fixadas em formol 10% e incluídas em parafina. Secções histológicas coradas por Hematoxilina-Eosina destas amostras foram avaliadas por meio de microscopia óptica. Macroscopicamente, 4 dos 100 animais (4% apresentaram espécimes de pentastomídeos no parênquima pulmonar. Os parasitos foram classificados taxonomicamente como pertencentes à espécie Sebekia oxycephala. Nenhuma alteração macroscópicas foi observada, porém, microscopicamente, lesões pulmonares foram encontradas em 37% dos casos, sendo que, lesões inflamatórias associadas ao parasitismo corresponderam a 75,6% dos mesmos (28/37. Nestes, segmentos degenerados e ovos de S. oxycephala encontravam-se envolvidos por cápsula de tecido conjuntivo fibroso e infiltrado inflamatório predominantemente composto por células gigantes do tipo corpo estranho. Três espécimes apresentaram espessamento de septos alveolares e sete exemplares continham infiltrado inflamatório granulocítico multifocal no parênquima pulmonar. As lesões associadas ao parasitismo, de modo geral, apresentaram intensidade discreta e parecem não representar uma causa importante de doença pulmonar entre a população estudada. Esta é a primeira descrição de lesões pulmonares em M. niger associadas ao parasitismo por S. oxycephala na Amaz

  7. Moléstia de Chagas aguda experimental: parasitismo do hipotálamo Experimental acute Chagas disease in the rat: parasitism of hypothalamus

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    Edymar Jardim

    1971-06-01

    Full Text Available O autor procurou relações entre alterações funcionais atribuídas ao hipotálamo e lesões orgânicas do mesmo, na vigência da moléstia de Chagas. Usou em seu trabalho ratos inoculados com T. cruzi por via intraperitonial. Realizou estudo histopatológico e quantitativo neuronal das várias regiões hipotalâmicas, em cortes seriados corados com a hematoxilina-eosina. Encontrou considerável percentagem de parasitismo hipotalâmico (70%, sendo que a região anterior é mais parasitada que a média ou a posterior. A destruição neuronal foi também mais evidente na região anterior. Sugere que as alterações do metabolismo glicídico, tireoidiano, da sudação e da potassemia, devam ser consideradas como seqüelas destas lesões.This work search relations between functional impairments imputed to hypothalamus and organic lesions in Chagas' disease. The author used rats with T. cruzi inoculation by intraperitonial way. Histopathologic and quantitative neuronal studies were done by serial sections of hypothalamus. It was demonstrated that the anterior hypothalamic region is more parasited than others, with greater neuronal destruction also. The author suggests that impairments of glycidic and thyroidian metabolism, of sweating and potassium blood level, must be considered as sequels of these lesions.

  8. Parasitismo de ovos de Heliothis virescens por Trichogramma spp. pode ser afetado por cultivares de algodão = Parasitism of Heliothis virescens eggs by Trichogramma spp. can be affected by cotton cultivars

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    Gilberto Santos Andrade

    2009-10-01

    Full Text Available O objetivo foi avaliar o parasitismo de ovos de Heliothis virescens em folhas das cultivares comerciais de algodoeiro de fibra branca (BRS 8H e colorida (BRS Safira por Trichogramma exiguum, Trichogramma pretiosum e Trichogramma atopovirilia. Trinta ovos dapraga, depositados sobre folhas das respectivas cultivares, foram expostos a cada espécie do parasitóide por 48h, em condições controladas, nas quais foram mantidos até a emergência de seus descendentes. Entre as culturas, obteve-se o maior parasitismo na cultivar BRS 8H. T. atopovirilia e T. exiguum apresentaram maiores porcentagens de parasitismo, seguido por T. pretiosum. Os três parasitóides tiveram viabilidade de parasitismo acima de 90% e razãosexual de 0,79 a 1,0 em ambas as cultivares, mas com menores taxas para T. exiguum, seguido por T. atopovirilia. O número de descendentes por ovo de H. virescens foi semelhante entre asespécies de parasitóides com valores 1,69 a 1,9. De maneira geral, T. atopovirilia obteve o melhor desempenho em ambas as cultivares, diferenciando-se de T. pretiosum. Assim, o desempenho dessas espécies pode ser afetado pelas cultivares. Os resultados obtidos sugerem que diferenças entre plantas são as causas de resultados variáveis no parasitismo de Trichogramma na mesma cultura.Parasitism of Heliothis virescens eggs by Trichogramma spp. can beaffected by cotton cultivars. The objective of this work was to evaluate the parasitism of Heliothis virescens eggs on leaves of commercial cultivars of white (BRS 8H and colored (BRS Safira cotton fibers, by Trichogramma exiguum, Trichogramma pretiosum andTrichogramma atopovirilia. Thirty eggs of the pest were deposited on leaves of the respective cultivars, and exposed to each species of the parasitoid for 48 hours in controlled conditions,where they were kept until the emergence of their descendants. The parasitism rate washigher on BRS 8H cotton with better parasitism of T. atopovirilia and T. exiguum

  9. Influência do parasitismo pelo nematoide de galhas nos níveis de nutrientes em folhas e na fenologia de goiabeira 'Paluma'

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    Eduardo José de Almeida

    2011-01-01

    Full Text Available A redução no vigor de goiabeiras parasitadas por Meloidogyne enterolobii é consequência das alterações ocorridas no sistema radicular que desencadeia uma síndrome caracterizada por desequilíbrio nutricional. Para caracterizar esse desequilíbrio, foram efetuadas análises químicas de folhas com três tipos de sintomas visuais (folhas sem sintoma, com sintoma leve e sintoma severo de goiabeiras 'Paluma', em duas épocas: fevereiro e agosto. As plantas foram cultivadas com e sem inoculação de Meloidogyne enterolobii por dois anos em microparcelas. Os teores de N, P e K decresceram em folhas sem sintomas para folhas com sintoma leve e severo nas análises realizadas nas duas épocas. O Ca teve sua concentração aumentada com o agravamento dos sintomas, em ambas as épocas. Em fevereiro, não houve alteração em Mg, mas em agosto sua concentração foi maior em folhas com sintoma severo do que em folhas com sintoma leve ou sem sintoma. O S teve uma concentração maior em folhas sem sintoma, em fevereiro, e em agosto as folhas com sintoma severo tiveram as maiores concentrações desse nutriente. O teor de B não diferiu quanto à presença ou ausência de sintomas e a épocas de análise. O Cu e o Fe tiveram aumento de concentração em fevereiro em folhas com ausência de sintoma para as folhas com sintoma severo. O teor de Zn reduziu com o aumento dos sintomas visuais nas folhas nas duas épocas de avaliação. A fenologia da goiabeira 'Paluma' não foi influenciada pelo parasitismo de M. enterolobii na primeira florada.

  10. La recepció de l'obra de Jules Verne pels lectors de diferents èpoques : Anàlisi de traduccions i adaptacions en català, castellà i anglès

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    Capdevila Vinaja, Marta

    2015-01-01

    Anàlisi de l'obra de Jules Verne des del punt de vista educatiu. Exposició dels seu valor educatiu en el camp de la ciència, la geografia i la història, així com també dels seus valors morals. Contradiccions entre la intenció educativa de les seves traduccions i adaptacions per a joves lectors actuals i el xoc moral que pot provocar el racisme, l'etnocentrisme i el masclisme del segle XIX, present implícitament i explícit a totes les obres de Jules Verne. Análisis de la obra de Julio Verne...

  11. Espessura da polpa como condicionante do parasitismo de mosca-das-frutas (Diptera:Tephritidae por Hymenoptera: braconidae Fruit pulp thickness conditioning fruit fly (Diptera:Tephritidae parasitism by Hymenoptera: braconidae

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    Eduardo Rodrigues Hickel

    2002-12-01

    Full Text Available Dentre as estratégias de manejo integrado de mosca-das-frutas está a manutenção de refúgios, vizinhos aos pomares, para proliferação de inimigos naturais. Objetivando verificar quais hospedeiros de mosca-das-frutas seriam mais adequados para incrementar o controle natural, estabeleceu-se uma correlação entre o nível de parasitismo e a espessura da polpa de frutos. Frutos em maturação de café (Coffea arabica, jabuticaba (Myrciaria cauliflora, cajá-mirim (Spondias lutea e laranja (Citrus aurantium foram coletados e mantidos em bandejas plásticas sobre uma camada de areia. As pupas de mosca-das-frutas retiradas da areia foram mantidas em estufa incubadora para emergência dos adultos. O diâmetro dos frutos e das sementes foi medido para se calcular a espessura da polpa. O café, com 1,8mm de polpa, foi o hospedeiro em que ocorreu maior índice de parasitismo de mosca-das-frutas (13,73%. O nível de parasitismo apresentou uma correlação negativa com a espessura da polpa dos frutos, sendo os frutos de polpa fina mais adequados para proliferação de parasitóides de mosca-das-frutas.One of the strategies for fruit fly integrated pest management is the refugee maintenance, near the orchards, for fruit fly natural enemies proliferation. With the aim to check the most suitable fruit fly hosts to increment natural control, a correlation was established between the parasitism level and the fruit pulp thickness. Ripening fruits of coffee (Coffea arabica, jabuticaba (Myrciaria cauliflora, cajá-mirim (Spondias lutea, and orange (Citrus aurantium were collected and maintained in plastic trays over a sand layer. The fruit fly pupae were taken from the sand and put in B.O.D. for adult emergence. The fruit and seed diameter were measure to estimate the fruit pulp thickness. The coffee bean, with 1.8mm of pulp was the fruit fly host with the greatest parasitism level (13.37%. The level of parasitism showed a negative relation with the fruit

  12. Evaluación del parasitismo natural de Meteorus laphygmae (Viereck sobre Spodoptera frugiperda (J. E. Smith en algodón y sorgo para las zonas de el Espinal (Tolima y Nariño (Cundinamarca

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    León M. Guillermo

    1984-12-01

    Full Text Available

    En los ultlmos años el Spodoptere frugiperda (LEP. Noctuldae ha sido considerado una de las plagas que causan mayor daño a los cultivos de algodón y sorgo; esta especie se ve afectada frecuentemente en el campo por el parasitoide Meteorus laphygmae (HYM. Braconlade. Con el objeto de evaluar el control natural que ejerce este bracónido sobre Ia plaga, se efectuó 81 presente estudio. EI trabajo se desarrolló durante el primer semestre de 1983 en las zonas de EI Espinal (Tolima y Nariño (Cundinamarca en ocho lotes comerciales de algodón y sorgo, a los cuales se les hicieron las aplicaciones necesarias de insecticidas y se efectuaron las prácticas de cultivo normalmente; se definieron tres parcelas de una hectárea por lote y semanalmente se muestrearon en cada una de ellas cinco sitios al azar; para ambos cultivos se revisaron dos metros cuadrados por sitio. En los muestreos de campo se colectaron todas las larvas de S. frugiperdi y después fueron llevadas al laboratorio Jaime Moor de la Federación Nacional de Algodoneros, para determinar si estaban o no parasitadas; en caso de estarlo se identificó el organismo causante. Los parasitoides encontrados fueron M.laphygmae (HYM. Braconidae, Apanteles sp., (HYM. Braconidae, Chelonus texanus (HYM. Braconidae, Dípteros de las famillas Tachinidae, Phoridae y Calliphoridae, Nemátodos de la familia Marmithidae, posiblemente Hexamermis sp. y el hongo Nomureae rileyl. En esta evaluación se determinó que M. Iaphygmae está presente en las zonas de EI Espinal y Nariño. Las larvas de S. frugiperda parasitadas por M. laphygmae murieron en los instares IV, V, VI Y VII. En los adultos de este agente de control se encontró la relación de sexos 1,5: 1 (1,5 hembras por cada macho. AI compararse con los otros enemigos naturales encontrados en el estudio, al M. Iaphygmae mostró los mayoras promedios de parasitismo para controlar a S. frugiperda en las dos zonas y en los dos cultivos, siendo por

  13. First report of interspecific facultative social parasitism in the paper wasp genus Mischocyttarus Saussure (Hymenoptera, Vespidae Primeiro registro de parasitismo social facultativo interespecífico em vespas do gênero Mischocyttarus Saussure (Hymenoptera, Vespidae

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    Thiago S. Montagna

    2012-06-01

    Full Text Available First report of interspecific facultative social parasitism in the paper wasp genus Mischocyttarus Saussure (Hymenoptera, Vespidae. Parasitism of colonies of the social wasp Mischocyttarus cerberus Ducke, 1918 by females of Mischocyttarus consimilis Zikán, 1949 was observed in a rural area of Dourados, state of Mato Grosso do Sul, Brazil. In all monitored cases, the invasion occurred in the pre-emergence colony stage, generally by a single female of M. consimilis. The period of establishment of the foreign female in the host colony was marked by antagonistic behaviors between the host female and the invasive. In general, the architecture of the parasitized nest was modified from the typical architecture of the host species nest.Primeiro registro de parasitismo social facultativo interespecífico em vespas do gênero Mischocyttarus Saussure (Hymenoptera, Vespidae. Parasitismo de colônias da vespa social Mischocyttarus cerberus Ducke, 1918 por fêmeas de Mischocyttarus consimilis Zikán, 1949 foram registrados em uma área rural no município de Dourados estado de Mato Grosso do Sul no Brasil. Em todos os casos monitorados a invasão ocorreu na fase colonial de pré-emergência, e em geral foi executado por uma única fêmea de M. consimilis. O período de estabelecimento da fêmea estrangeira na colônia hospedeira foi marcado por comportamentos antagônicos entre as fêmeas interespecíficas. Em geral, a arquitetura do ninho parasitado foi modificada em relação à arquitetura típica do ninho da espécie hospedeira.

  14. Parasitismo natural em moscas-das-frutas (Diptera: Tephritidae no semiárido do sudoeste da Bahia, Brasil Natural parasitism in fruit-flies in the fruticulture area of anagé, semi-arid of southwestern Bahia, Brazil

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    Ricardo Falcão de Sá

    2012-12-01

    Full Text Available Parasitoides são importantes agentes de controle natural de tefritídeos, e os conhecimentos sobre as relações tritróficas podem subsidiar o manejo destas pragas. Este trabalho objetivou estimar índices de parasitismo em moscas-das-frutas, em 21 espécies vegetais, e identificar as espécies de parasitoides associados, nas condições do semiárido do sudoeste da Bahia. Oito hospedeiros apresentaram infestação por Anastrepha spp. e, destes, em quatro, ocorreu parasitismo superior a 20,0%, sendo: 20,8% (Ziziphus joazeiro L.; 21,3% (Spondias tuberosa L.; 32,4% (Spondias purpurea L. e 57,1% (Malpighia emarginata L.. Os parasitoides coletados pertencem à família Braconidae, sendo 89% de Doryctobracon areolatus e 11% de Asobara anastrephae.Parasitoids are important natural control agents of tephritids and knowledge about the tritrophic relationships can support the management of these pests. This study aimed to estimate of parasitism indexes in fruit flies in 21 plant species and identify the species of parasitoids associated, in semiarid conditions of Southwestern Bahia. Eight hosts showed infestation by Anastrepha spp. and, of these, four occurred parasitism above 20.0%, of which: 20.8% (Ziziphus joazeiro L.; 21.3% (Spondias tuberosa L.; 32.4% (Spondias purpurea L. and 57.1% (Malpighia emarginata L.. The collected parasitoids belong to the Braconidae family, 89% of Doryctobracon areolatus and 11% of Asobara anastrephae.

  15. PSPVDC: Una Propuesta que Incorpora el Diseño por Contrato Verificado al Personal Software Process

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    Silvana Moreno

    2013-10-01

    Full Text Available El desarrollo de software se ha vuelto una actividad muy importante en el mundo actual. Existen números procesos de desarrollo de software que buscan aumentar la calidad de los productos y disminuir los tiempos de salida al mercado. Sin embargo, el software contiene defectos y éstos causan fallas potencialmente graves durante su ejecución. Este trabajo propone un nuevo proceso de desarrollo de software denominado PSPVDC que combina el enfoque del Personal Software Process (PSP y del Diseño por Contrato Verificado (VDbC con el objetivo de mejorar la calidad de los productos con respecto al PSP. Además se presenta una revisión sistemática de la literatura que busca conocer las adaptaciones al PSP que hayan sido documentadas, en particular aquellas que incorporan métodos formales.

  16. Ciclo biológico, exigências térmicas e parasitismo de Muscidifurax uniraptor em pupas de mosca doméstica Life cycle, thermal requirements and parasitism of Muscidifurax uniraptor on house fly pupae

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    Marcílio José Thomazini

    2001-09-01

    Full Text Available Os parasitóides pupais estão entre os principais responsáveis pela redução populacional de mosca doméstica em aviários, e Muscidifurax uniraptor Kogan & Legner (Hymenoptera: Pteromalidae é um dos principais parasitóides presentes nestes ambientes no Estado de São Paulo. O objetivo deste trabalho foi determinar a duração do ciclo biológico, as exigências térmicas e o parasitismo de M. uniraptor em pupas de Musca domestica L. (Diptera: Muscidae em temperaturas constantes. Os testes foram realizados em câmaras climatizadas nas temperaturas de 18, 20, 22, 25, 28, 30 e 32 ± 1°C, 70 ± 10% U.R. e 14 h de fotofase. Em cada câmara 200 pupas de mosca doméstica, com 24 a 48 h de idade, foram expostas a 40 parasitóides fêmeas partenogenéticas, com 0 a 24 h de idade, por 24 h. A temperatura influenciou o desenvolvimento e a reprodução de M. uniraptor. O menor valor do período de ovo a adulto foi a 30°C (17 dias e as porcentagens de parasitismo e de emergência de descendentes foram maiores a 28°C, com 87 e 63,5%, respectivamente. A temperatura base encontrada para fêmeas do parasitóide foi de 9,43°C, com uma constante térmica de 366,62 graus-dia (GD. A elevação da temperatura diminui a duração do período de ovo a adulto (entre 18 e 30°C e aumenta o parasitismo (entre 18 e 28°C de M. uniraptor. A faixa de temperatura entre 28 e 30°C é considerada a mais adequada para criação de M. uniraptor em pupas de mosca doméstica.The pupal parasitoids are among the most important organisms responsible for house fly population reduction in poultry farms. Muscidifurax uniraptor Kogan & Legner (Hymenoptera: Pteromalidae is one of the main parasitoids that occur in poultry farms at São Paulo State, Brazil. The objective of this study was to determine the life cycle duration, the thermal requirements and the parasitism of M. uniraptor on Musca domestica L. (Diptera: Muscidae pupae under constant temperatures. The experiment was

  17. Capacidade de parasitismo de Trichogramma exiguum Pinto & Platner, 1978 (Hymenoptera: Trichogrammatidae em ovos de Plutella xylostella (L., 1758 (Lepidoptera: Plutellidae em diferentes temperaturas Parasitism capacity of Trichogramma exiguum Pinto & Platner, 1978 (Hymenoptera: Trichogrammatidae on different temperatures on Plutella xylostella (L., 1758 (Lepidoptera: Plutellidae eggs

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    Fabricio Fagundes Pereira

    2007-04-01

    Full Text Available Estudou-se a capacidade de parasitismo de Trichogramma exiguum Pinto & Platner, 1978 (Hymenoptera: Trichogrammatidae em ovos de Plutella xylostella (L., 1758 (Lepidoptera: Plutellidae nas temperaturas de 18, 20, 22, 25, 28, 30 e 32°C, avaliando-se o número de ovos parasitados diariamente, a porcentagem acumulada de parasitismo, o número total de ovos parasitados por fêmea e a longevidade de fêmeas. O ritmo de parasitismo, durante as primeiras 24 horas, oscilou de 1,5 a 11,7 ovos parasitados por fêmeas de T. exiguum, nas temperaturas entre 18 e 32°C. O parasitismo acumulado de ovos de P. xylostella, nas temperaturas de 18, 20, 22, 25, 28, 30 e 32°C, atingiu 80%, respectivamente, aos 10, 7, 8, 5, 5, 4 e 5 dias, por T. exiguum. As maiores taxas de parasitismo obtidas por T. exiguum ocorreram nas faixas térmicas de 25, 30 e 32°C. A longevidade de fêmeas de T. exiguum, nas faixas térmicas compreendidas entre 18 e 32°C, variou de 4,2 a 7,4 dias.The parasitism capacity of Trichogramma exiguum Pinto & Platner, 1978 (Hymenoptera: Trichogrammatidae on eggs of Plutella xylostella (L., 1758 (Lepidoptera: Plutellidae was studied, under temperatures of 18, 20, 22, 25, 28, 30 and 32°C aiming at evaluating the number of days with parasitism, cumulated parasitism, total number of eggs parasited per female and their longevity. Parasitism during the first 24 hours ranged from 1.5 to 11.7 eggs of P. xylostella per T. exiguum female in the range of 18 to 32°C. Cumulated egg parasitism of P. xylostella by T. exiguum reached 80% after 10, 7, 8, 5, 5, 4 and 5 days at 18, 20, 22, 25, 28, 30 and 32°C. Higher parasitism rates were recorded at 25, 30 and 32°C while longevity of T. exiguum females varied from 4.2 to 7.4 days under temperatures of 18 to 32°C.

  18. Impact of the number of Spodoptera frugiperda egg layers on parasitism by Trichogramma atopovirilia Impacto do número de camadas de ovos de Spodoptera frugiperda no parasitismo por Trichogramma atopovirilia

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    Eduardo Barbosa Beserra

    2005-04-01

    Full Text Available Egg parasitoids of the genus Trichogramma (Hymenoptera: Trichogrammatidae can be found in several crops attacking Spodoptera frugiperda (J. E. Smith, 1797 (Lepidoptera: Noctuidae eggs. It is therefore necessary to demonstrate the capacity of these natural enemies in suppressing populations of the pest to allow them to be used in biological control programs against that species. This work had the objective of evaluating the impact of egg layer distribution in S. frugiperda egg masses on the parasitism capacity of Trichogramma atopovirilia Oatman & Platner, 1983. Masses containing one, two, and three layers were used as treatments, and 1.6 parasitoid per egg of the pest were released. Parasitism percentage differences were observed among the three types of masses under study, on average 66.24 ± 8.56%, 45.20 ± 6.20%, and 40.10± 3.46% for egg masses with one, two, and three layers, respectively, demonstrating the potential of use of the parasitoid for the control of fall armyworm.Parasitóides de ovos do gênero Trichogramma (Hymenoptera: Trichogrammatidae ocorrem em diversas culturas atacando ovos de Spodoptera frugiperda (J. E. Smith, 1797 (Lepidoptera: Noctuidae sendo necessário que se demonstre a capacidade desses inimigos naturais em suprimir a população da praga para que eles possam ser utilizados em programas de controle biológico daquela espécie. O trabalho teve como objetivo avaliar o impacto da distribuição dos ovos em camadas nas posturas de S. frugiperda sobre a capacidade de parasitismo de Trichogramma atopovirilia Oatman & Platner, 1983. Foram utilizadas como tratamentos posturas com uma, duas e três camadas e liberado 1.6 parasitóide por ovo da praga. Observaram-se diferenças quanto à porcentagem de parasitismo entre os três tipos de posturas estudados, sendo em média de 66,24 ± 8,56%, 45,20 ± 6,20% e 40,10 ± 3,46% para posturas com uma, duas e três camadas respectivamente, mostrando o potencial de utilização do

  19. Human parasitism by Phagicola sp (Trematoda, Heterophyidae in Cananéia, São Paulo State, Brazil Parasitismo humano por Phagicola sp. no município de Cananéia, Estado de São Paulo, Brasil

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    Pedro Paulo Chieffi

    1990-08-01

    Full Text Available We report one case of parasitism by Phagicola sp. (Trematoda, Heterophyidae in a 31 years-old woman who, in 1987, travelled and stayed several months in the municipality of Cananéia (SP, where she ingested, in various occasions, raw mullet (Mugil sp.. The patient refered mild intestinal pain and laboratory examinations showed eggs of Phagicola sp. in the stools and a slight increase in eosinophil blood levels (8%. After treatment with praziquantel (75 mg/kg per day for three days all the symptoms and signs disappeared. This is, certainly, the first record of human infection by Phagicola sp. in Brazil and, perhaps, in countries other than the U.S.A. where unclear references to a few human cases were reported in the South-eastern region.Relata-se o primeiro caso de parasitismo humano por Phagicola sp. registrado no Brasil em paciente do sexo feminino e de 31 anos de idade que viajara, no início de 1987, para Cananéia, no litoral sul do Estado de São Paulo, permanecendo alguns meses nesse município, por motivos profissionais. A paciente queixava-se de dores em cólica no abdomem; no exame parasitológico de fezes encontraram-se ovos de Phagicola sp. e discreto aumento da quantidade de eosinófilos (8% no hemograma. A paciente admitiu a ingestão de pedaços crus da tainha (Mugil sp., em diversas ocasiões, durante sua permanência em Cananéia. O tratamento com praziquantel (75 mg/kg/dia/3 dias resultou em cura clínica e parasitológica. Não existem outros relatos de parasitismo humano por Phagicola sp. no Brasil. Em outros países, cuidadosa revisão da literatura não logrou encontrar referências de acometimento humano, salvo vaga citação acerca da possível ocorrência de alguns casos no sudeste dos Estados Unidos da América do Norte.

  20. Experimental american trypanomiasis in rats: sympathetic denervation, parasitism and inflammatory process Desnervação simpática, parasitismo e processo inflamatório durante a doença de Chagas experimental, em ratos

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    Conceição R. S. Machado

    1989-12-01

    Full Text Available Tissue parasitism, inflammatory process (histologic methods and sympathetic denervation (glyoxylic acid-induced histofluorescence for demonstration of catecholamines were studied in the heart (atrium and verntricle and the submandibular gland of rats infected with the Y strain of Trypanosoma cruzi. In the heart paralleling intense parasitism and inflammatory process, the sympathetic denervation started at day 6 of infection and at the end of the acute phase (day 20 practically no varicose nerve terminals were found in both myocardium and vessels. In the submandibular gland, in spite of the rarity of anastigote pseudocysts and the scarcity of inflammatory foci, slight to moderate (days 13-15 of infection or moderate to severe denervation (day 20 was found. At day 120 of infection both organs exhibited normal pattern of sympathetic innervation and only the heart showed some inflammatory foci and rare psudocysts (ventricle. Our data suggest the involvement of circulating factors in the sympathetic denervation phenomena but indicate that local inflammatory process is, at least, an aggravating factor.Parasitismo tecidual, processo inflamatório (métodos histológicos e desnervação simpática (histofluorescência induzida por ácido glioxílico para demosntração de catecolaminas foram estudados no coração (átrio e ventrículo e na glândula submandibular de ratos infectados com cepa Y de Trypanosoma cruzi. No coração, em paralelo com intenso parasitismo e processo inglamatório, a desnervação simpática iniciuo-se no 6º dia de infecção e ao fim da fase aguda (20º dia praticamente nenhuma terminação nervosa varicosa foi encontrada tanto no miocárdio como em vasos. Na glândula submandibular, apesar da raridade de ninhos de amastigotas e da escassez de focos inflamatórios, encontram-se discreta e moderada 13º-15º dia de infeccção ou moderada a severa (20º dia desnervação. Aos 120 dias de infecção, ambos os órgãos exibiram

  1. Distribución de las especies de Diatraea (Pyralidae en caña de azúcar (Saccharum sp. en el valle geográfico del río Cauca y algunas observaciones sobre su parasitismo

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    Gómez Luis A.

    1986-12-01

    Full Text Available En tres zonas del valle geográfico del R 10 Cauca (Norte, Centro y Sur , se utilizaron trampas con hembras vírgenes para establecer la distribución y abundancia de Diatraea indigenella Dyar y Heinrich y D. saccharalis (Fabricius en suertes sembradas con la variedad CP 57603. Además se determinó la intensidad de infestación (1.1 y el parasitismo en campo y laboratorio. En la trampa Equis instalada a ras del cultivo se capturó el mayor número de machos. D. indigenella se capturó en las zonas Sur (Ingenio Mayagüez y Centro (Ingenio Riopaila. D. saccharalis se encontró ampliamente distribuida en el valle geográfico del río Cauca. La cantidad de machos capturados en las trampas no permite predecir el daño del barrenador y la evaluación de la intensidad de infestación se hace necesaria para estimar el daño. El parasitismo total de campo mostró eficiencia diferencial para los parasitoides en cada una de ellas. A nivel de laboratorio se evaluaron Paratheresia claripalpis y Metagonistylum minense sobre Diatraea spp. habiendo sido mejor hospedero D. saccharalis.Pheremone traps were used in three zones of the Cauca Valley (North, Center and South in order to determine the distribution and abundance of Diatraea indigenella Dyar & Heinrich and Diatraea saccharalis (Fabricius. They were located in fields with the variety CP 57603 plant croo. The intensity of infestation (1.1 and parasitism were also measured. Among four models of traps tested, the one called Equis type and set up at the canopy level, caugh the largest number of males. Weekly record s until harvest indicated that D. indigenella is found in the southern and in the Central parts of the Cauca Valley while D. saccharalis is widely distributed all over it. Species Diatraea spp. Male trap catching is not a variable that allows to predict e borers damage and the evaluation of the 1.1 is necessary to estimate it. Metagonistylum minense Townsend was the only parasite found in the

  2. Adaptaciones metodológicas para el análisis del discurso de niños con discapacidad intelectual: narrando sin lenguaje

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    Dominique Manghi Haquin

    2016-01-01

    Full Text Available Dada la necesidad de comprender las formas de comunicación de personas con discapacidad intelectual para favorecer su participación social, este estudio trata la narración como una instancia discursiva autogestionada más allá del lenguaje. El objetivo es sistematizar una metodología que permita explorar su discurso narrativo usando una perspectiva multimodal. La descripción corresponde a las narraciones de quince escolares chilenos con discapacidad intelectual y escaso desarrollo de la lengua oral, pero con intención narrativa. A partir de la adaptación de una tarea de recontado, se analizan discursivamente sus producciones multimodales y se observan narraciones enfocadas en las acciones de los personajes y construidas a partir de una combinación de recursos comunicativos. La metodología resulta apropiada para dar cuenta de los recursos narrativos usados por estos estudiantes en los primeros años escolares y legitima sus estrategias narrativas, lo cual contribuye al desarrollo de la disciplina educación especial y al estudio de la comunicación desde una mirada inclusiva.

  3. Adaptaciones curriculares en el área de cultura física para niños con discapacidad física motora del cuarto año de la Escuela de Educación Básica 16 de Abril del cantón Sígsig, provincia del Azuay

    OpenAIRE

    Idrovo Condo, Diego Francisco; Samaniego Delgado, Italo Rafael

    2016-01-01

    La presente investigación tuvo como objetivo dar a conocer cuáles son los niveles de conocimiento de los profesores de educación física con respecto a la planificación e implementación de adaptaciones curriculares para niños con discapacidad física-motora, demostrando la importancia de contar con maestros capacitados que atiendan las necesidades educativas de los estudiantes. This research aimed to make known what are the levels of knowledge of physical education teachers regarding the pla...

  4. Adaptation to the KMT Fixed Biomass on Moving Bed process in the waste water treatment plant in Tafalla and Olite, Navarra, Spain; Adaptacion al proceso KMT de Biomasa Fija sobre Lecho Movil en la EDAR de Tafalla y Olite

    Energy Technology Data Exchange (ETDEWEB)

    Cortacans, J. A.; Rodrigo, J. C.; Garcia Gamuza, J.

    2001-07-01

    This article describes the remodeling carried out on the Tafalla and Olite waste water treatment plant in 2000to enable it to cope with a larger flow and load without having to construct new treatment lines. This was made possible by adapting the existing conventional active sludge process to the KMT Fixed Biomass on Moving Bed process. The article also shows how the final two-stage design was verified by means of pilot plant trials. These experiments tested the technical viability of installing a first high-load reactor prior to the existing primary decantation as a way of dealing with the seasonal effluents from the wine-cellars in the region and of obtaining partial nitrification in the last biological tank of the second stage during the rest of the year. (Author) 7 refs.

  5. Oviposição de Alabama argillacea Hübner (Lepidoptera: Noctuidae) em cultivares de algodoeiro e parasitismo natural de ovos por Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) na região de Chapadão do Sul, MS

    OpenAIRE

    Silva, Elias Almeida [UNESP

    2009-01-01

    Alabama argillacea (Hübner) é praga chave do algodoeiro no Brasil. Com o objetivo de estudar a intensidade de oviposição de A. argillacea e o parasitismo de seus ovos por Trichogramma pretiosum Riley, nos estágios fenológicos de sete cultivares, instalou-se o experimento na Fazenda Savana na região de Chapadão do Sul, MS, no ano agrícola 2006/07. As cultivares FMT 701, FMX 966, Acala 90, NuOPAL, Delta Penta, CD 409 e DeltaOPAL, foram semeadas em 20/12/2006, no Delineamento de Blocos Casualiza...

  6. Natural parasitism of Diaphorina citri Kuwayama (Hemiptera, Psyllidae nymphs by Tamarixia radiata Waterston (Hymenoptera, Eulophidae in São Paulo orange groves Parasitismo natural de ninfas de Diaphorina citri Kuwayama (Hemiptera, Psyllidae por Tamarixia radiata Waterston (Hymenoptera, Eulophidae em pomares de laranja em São Paulo

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    Paulo Eduardo Branco Paiva

    2012-12-01

    parasitismo de 12.4%. O maior parasitismo foi verificado no "verão" (janeiro a março com média de 25.7%. O parasitismo de ninfas superou 90% em duas amostras. São discutidas as causas próváveis das variações entre o parasitismo de D. citri por T. radiata.

  7. Crescimento micelial e parasitismo de Paecilomyces lilacinus sobre ovos de Meloidogyne paranaensis em diferentes temperaturas"in vitro" "In vitro" mycelial growth and parasitism of Paecilomyces lilacinus on Meloidogyne paranaensis eggs at different temperatures

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    Marina Capparelli Cadioli

    2007-04-01

    Full Text Available Paecilomyces lilacinus é um fungo de solo, parasita facultativo de ovos de nematóides, que pode crescer rapidamente "in vitro". Este trabalho teve como objetivo avaliar o crescimento micelial de P. lilacinus em diferentes temperaturas e selecionar os melhores isolados quanto à capacidade de parasitar ovos de Meloidogyne paranaensis. Foram avaliados isolados de P. lilacinus, obtidos de solos coletados na região de Londrina, PR. Para o isolamento empregou-se a técnica de diluição seriada dos solos e plaqueamento em meio de cultura semi-seletivo. A determinação do crescimento micelial e do parasitismo "in vitro" dos isolados sobre M. paranaensis foi realizada em placas de Petri contendo meio BDA. Os isolados foram incubados em B.O.D. a temperaturas de 20ºC, 22,5ºC, 25ºC, 27,5ºC e 30ºC. A avaliação do crescimento foi interrompida quando em um dos tratamentos a colônia do fungo atingiu a borda da placa de Petri e a determinação do parasitismo foi realizada depois de oito dias de incubação, calculando-se a porcentagem de ovos parasitados. O crescimento micelial dos isolados de P. lilacinus teve grande dependência da temperatura de incubação a que foram submetidos, sendo mais rápido à temperatura de 22,5ºC. Os isolados de P. lilacinus revelaram habilidade para infectar os ovos de M. paranaensis em meio BDA, principalmente na temperatura de 25ºC.Paecilomyces lilacinus is a soil fungus, facultative parasite of nematode eggs, which develops quickly "in vitro". The mycelial growth of P. lilacinus isolates was evaluated at different temperatures and the best isolates, regarding the capacity to parasite Meloidogyne paranaensis eggs, were chosen. P. lilacinus soil isolates from Londrina, Parana state, were evaluated. Isolation was done using serial dilution of the soils and plating it in semi-selective agar medium. The determination of mycelial growth and "in vitro" parasitism of these isolates was done using Petri plates

  8. Capacidade de parasitismo de Trichogramma exiguum Pinto & Platner, 1978 (Hymenoptera: Trichogrammatidae criado em dois hospedeiros por diversas gerações Parasitism capacity of Trichogramma exiguum Pinto & Platner, 1978 (Hymenoptera: Trichogrammatidae reared in two hosts for several generations

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    Harley Nonato de Oliveira

    2005-04-01

    Full Text Available O Trichogramma é um inimigo natural dos mais estudados e utilizados atualmente no mundo. A qualidade e o desempenho de Trichogramma podem ser influenciados por alguns fatores, tal como o hospedeiro alternativo utilizado na criação massal. Objetivou-se com este trabalho foi obter informações básicas sobre os aspectos biológicos de Trichogramma exiguum Pinto & Platner, 1983 (Hymenoptera: Trichogrammatidae, criado nos hospedeiros alternativos Anagasta kuehniella (Zeller, 1879 (Lepidoptera: Pyralidae e Sitotroga cerealella (Oliv., 1819 (Lepidoptera: Gelechiidae por 10, 20 e 30 gerações, e os possíveis efeitos nas características biológicas desse parasitóide. Em cada uma das gerações avaliadas, foram utilizadas 25 fêmeas de T. exiguum recém-emergidas de cada hospedeiro, as quais foram individualizadas em tubos de vidro que continham gotículas de mel de abelha. Cada fêmea recebeu uma cartela contendo 40 ovos do hospedeiro na qual estava sendo mantido. Foi permitido um parasitismo de 24 horas para essas cartelas, sendo as mesmas trocadas diariamente até a morte da fêmea.O número de ovos parasitados no primeiro dia, a capacidade de parasitismo e a longevidade de T. exiguum foi superior quando se utilizou ovos de A. kuehniella, ao longo das diferentes gerações, mostrando ser esse hospedeiro mais indicado para a criação massal de T. exiguum.Trichogramma is one the most studied and used natural enemies of insect pests in the world. The quality and the performance of Trichogramma can be influenced by some factors, like the kind of host used for its mass rearing. The objective of this research was to obtain some basic informations about the biological aspects of Trichogramma exiguum Pinto & Platner, 1983 (Hymenoptera: Trichogrammatidae, reared on Anagasta kuehniella (Zeller, 1879 (Lepidoptera: Pyralidae and Sitotroga cerealella (Oliv., 1819 (Lepidoptera: Gelechiidae for 10, 20 e 30 generations, and the effect of something on the

  9. ALS Association

    Science.gov (United States)

    ... ALS and their families in areas affected by Hurricane Harvey. Learn More The ALS Association Disaster Relief Fund ... ALS and their families in areas affected by Hurricane Harvey. Learn More Our Mission To discover treatments and ...

  10. Influência do parasitismo por nematódeos sobre o perfil hematológico de caprinos Influence of nematodes on the hematological parameters of goats

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    M.J.T. Mattos

    2005-02-01

    Full Text Available The interaction between ivermectin-resistant and ivermectin-sensitive nematodes and the effect of this anthelmintic on the hematological status of naturally infected goats was assessed using 36 animals. Of these animals, 12 were infected by ivermectin-sensitive gastrointestinal nematodes of the superfamily Trichostrongyloidea (G1s e G1s 12 were infected by ivermectin-resistant nematodes (G2r e G2r and 12 uninfect goats (G3np. Six infected goats of each group (G1sm e G2rm received oral ivermectin al the dose of 200µg/kg, while six were used as controls (G1sc e G2rc. Blood and fecal samples were collected on the day of medication (day zero, at seven, and at 14 days thereafter. The erythrocyte count and hematocrit levels in goats infected by sensitive strains of Haemonchus was greater than that of the group infected by a resistant strain. These values are lower in comparison to those observed in uninfected goats. The increase in the number of eggs per gram of feces, regardless of the strain, is inversely related to the hematocrit level. The use of ivermectin did not significantly change the hematological parameters of goats.

  11. Leyendas Puertorriquenas, Adaptaciones (Puerto Rican Legends, Adaptations).

    Science.gov (United States)

    Rodriguez, Aurea; Puigdollers, Carmen

    The Puerto Rican legends presented here have been adapted for use in a bilingual education setting. They are presented in the framework of a Puerto Rican child's first visit to the island with his family. The four legends are: (1) "Carabali"; (2) "Guanina"; (3) "El Penon de las Palomas"; and (4) "La Garita del Diablo." The book is illistrated with…

  12. Sindrome de respuesta inflamatoria fetal : adaptacion cardiovascular

    National Research Council Canada - National Science Library

    Arreaza-Graterol, Mortimer; Rojas-Barrera, Juan Diego; Molina-Giraldo, Saulo

    2011-01-01

    Introduccion: el sindrome de respuesta inflamatoria fetal es una condicion caracterizada por reaccion inflamatoria sistemica acompanada de alteraciones bioquimicas como la elevacion de la interleucina 6 (IL-6...

  13. Determinantes sociales, prácticas de alimentación y consecuencias nutricionales del parasitismo intestinal en niños de 7 a 18 meses de edad en Guapi, Cauca.

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    Beatriz Eugenia Alvarado

    2006-03-01

    Full Text Available Introducción. Los estudios de parasitismo intestinal en menores de 2 años raramente se realizan. Sus consecuencias nutricionales y la factibilidad de la prevención justifican su estudio. Objetivos. Identificar la prevalencia de parásitos intestinales patógenos, sus asociaciones con los determinantes sociales y las prácticas de alimentación y sus efectos sobre el estado nutricional. Materiales y métodos. Se censó a los niños menores de 18 meses de una comunidad urbana de la región Pacífica colombiana. Se obtuvieron 136 muestras, que representaban 62% de la población de menores de 18 meses en el área de estudio. Se identificó la presencia de parásitos intestinales patógenos a partir del examen directo y el concentrado de Ritchie-Frick modificado. Se utilizaron regresiones logísticas múltiples para predecir la presencia de parásitos intestinales patógenos. Se calcularon los puntajes Z de longitud para edad (£2 DE, desnutrición crónica y peso para longitud (£2 DE, desnutrición aguda. Se realizaron análisis de covarianza para determinar la relación entre los parásitos intestinales patógenos y el estado nutricional con ajustes por edad. Resultados. El 30,6% de los niños estaban infectados: 26,2% presentaba helmintiasis (Ascaris lumbricoides, Trichuris trichiura, Strongyloides stercolaris; 14,9% tenía protozoos (Giardia lamblia, y 11,8% poliparasitismo intestinal. La prevalencia de desnutrición aguda y crónica fue de 2,9% y 12,5%, respectivamente. La ausencia de sanitario y una baja escolaridad de la madre se asociaron a una mayor presencia de poliparasitismo y helmintiasis (p

  14. Parasitismo, estado nutricional y ambiente: una mirada interdisciplinaria a las enteroparasitosis de poblaciones humanas en áreas de alto riesgo epidemiológico

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    Navone, Graciela Teresa

    2005-01-01

    Full Text Available Se consideró la importancia endémica que tienen las enteroparasitosis y su impacto sobre la calidad de vida de poblaciones aborígenes de la provincia de Misiones. Se formo un equipo de parasitólogos, antropólogos y etnógrafos para iniciar en el año 1999 un estudio interdisciplinario con las comunidades Mbya-Guaraní de Ka aguy Poty e Yvy Pytã asentadas en la Reserva Privada de la UNLP Valle del Arroyo Cuña Pirú. Se abordaron en forma integral y en un ámbito acotado las condiciones bioculturales en que se instalan y prosperan las infecciones parasitarias. El seguimiento de los casos detectados permitió considerar diferentes alternativas para la toma de decisiones respecto al diagnóstico, tratamiento y prevención. Se realizaron talleres en los que participaron distintos sectores de la población local. A partir del éxito obtenido en la aplicación de esta estrategia de investigación y transferencia, surgió el interés y la demanda por parte de instituciones sanitarias y educativas de profundizar el estudio en áreas rurales y extenderlo a poblaciones suburbanas del Municipio de Aristóbulo del Valle. El sostenimiento a mediano y largo plazo de toda estrategia para el control de las parasitosis humanas supone la participación activa de todos los sectores y una propuesta académicocientífica de la Universidad, con el fin de construir en conjunto de estrategias acordes a la realidad nutricional, ambiental y sociocultural de cada población analizada.

  15. Ocorrência de parasitos gastrointestinais e fatores de risco de parasitismo em gatos domésticos urbanos de Santa Maria, RS, Brasil

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    Felipe Lamberti Pivoto

    2013-08-01

    Full Text Available Neste trabalho, verificou-se a ocorrência de parasitos gastrointestinais em gatos urbanos domiciliados no município de Santa Maria, RS, no período de março a junho de 2011. Além disso, foram avaliados os fatores de riscos relacionados com a infecção dos parasitos gastrointestinais. Coletou-se 191 amostras de fezes de felinos para a realização de exames coproparasitológico e aplicado um questionário epidemiológico aos proprietários, contendo questões relativas aos hábitos e manejo dos seus animais. Das amostras fecais analisadas, 47,1% (90/191 foram positivas para um ou mais parasitas gastrointestinais, sendo 33,5% (64/191 identificadas como mono-infecção e 13,6% (26/191 como multi-infecção. Toxocara spp. (18,8% e Giardia spp. (4,2% foram os principais parasitos encontrados na mono-infecção. Na multi-infecção, as principais associações de parasitos detectadas incluíram: Ancylostoma spp. + Toxocara spp. (3,1% e Cystoisospora spp. + Cryptosporidium spp. + Giardia spp. + Toxoplasma spp. + Toxocara spp. (1,5%. Os dados epidemiológicos foram submetidos ao teste qui-quadrado, Fischer, análise da relação de chances (OR, também analisada a relação entre os diferentes fatores epidemiológicos e a presença de parasitos gastrointestinais (P>0,05. Os principais fatores de risco identificados foram: a escolaridade dos proprietários e a frequência de realização de tratamentos antiparasitários, os quais exerceram influência direta na ocorrência de parasitos gastrointestinais. Os dados obtidos contribuem para o conhecimento da epidemiologia das parasitoses gastrointestinais, bem como poderão auxiliar médicos veterinários e proprietários na elaboração de estratégias de controle e profilaxia antiparasitária para gatos domésticos.

  16. Parasitismo por Neodohrniphora spp. Malloch (Diptera, Phoridae em operárias de Atta sexdens rubropilosa Forel (Hymenoptera, Formicidae Parasitism by Neodohrniphora spp. Malloch (Diptera, Phoridae on workers of Atta sexdens rubropilosa Forel (Hymenoptera, Formicidae

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    Marcos Antonio Lima Bragança

    2008-01-01

    Full Text Available Parasitóides do gênero Neodohrniphora Malloch, 1914 geralmente atacam operárias de Atta sexdens rubropilosa Forel, 1908 em baixa freqüência, mas os ataques alteram o ritmo de forrageamento das colônias, reduzindo o número e tamanho das operárias e aumentando o abandono de fragmentos vegetais ao longo das trilhas. O forrageamento de A. sexdens rubropilosa pode ser diurno ou noturno, mas existem dúvidas se Neodohrniphora spp. atacam as operárias dessa formiga também durante a noite. Os objetivos deste estudo foram verificar a ocorrência de ataques e avaliar o grau de parasitismo de forídeos do gênero Neodohrniphora em operárias de A. sexdens rubropilosa sob três níveis de luminosidade em laboratório, incluindo a ausência de luz. Os níveis de luminosidade foram: alta (0,65 µmol/m³/s; baixa (0,05 µmol/m³/s e ausência de luz (0,0 µmol/m³/s. Fêmeas de Neodohrniphora tonhascai Brown, 2001 e Neodohrniphora elongata Brown, 2001 coletadas no campo e liberadas em laboratório somente efetuaram ataques e foram obtidas operárias parasitadas sob alta luminosidade, sugerindo que essas espécies não são ativas no campo durante o período noturno (ausência de luz. Os resultados sugerem também que o estímulo visual em Neodohrniphora spp. pode ser um componente essencial para a localização e reconhecimento do hospedeiro.Parasitoids of the genus Neodohrniphora Malloch, 1914 generally attack workers of Atta sexdens rubropilosa Forel, 1908 in low ratios. However these attacks alter the foraging rhythm and reduces the number and size of workers as well as increases the number of abandoned plant fragments along the trails. A. sexdens rubropilosa can have a diurnal or nocturnal foraging activity, but it is uncertain if Neodohrniphora spp. attacks workers of this host during the night. The objective of this work was to verify the occurrence of Neodohrniphora phorids attacks and the level of parasitism on workers of A. sexdens

  17. Parasitismo intestinal em uma aldeia indígena Parakanã, sudeste do Estado do Pará, Brasil Intestinal parasitism in a Parakanã indigenous community in southwestern Pará State, Brazil

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    Rogério dos Anjos Miranda

    1998-07-01

    Full Text Available O trabalho visa estudar a ocorrência e os aspectos epidemiológicos do parasitismo intestinal na aldeia Paranatinga da tribo indígena Parakanã, Amazônia Oriental Brasileira. Foram realizados dois inquéritos coproparasitológicos, em abril de 1992 e em fevereiro de 1995. Os métodos utilizados na identificação dos agentes parasitários foram os de Hoffman e exame direto, dois métodos simples, facilmente exeqüíveis em aldeias indígenas. Da amostra de 126 índios em abril de 1992 (população de 215 índios, 101 (80,2% encontravam-se parasitados por pelo menos um enteroparasita. Ancilostomídeos foram encontrados em 33,3%, A. lumbricoides, em 42,8%, T. trichiura, em 0,8%, e S. stercoralis, em 5,6%. Em relação aos protozoários, E. histolytica foi encontrada em 65,0% e G. lamblia, em 46,8%. No inquérito de fevereiro de 1995, apesar do aumento da prevalência total em comparação com o de abril de 1992 (p = 0,04, houve diminuição das prevalências de ancilostomídeos, E. histolytica, G. lamblia, e ausência de S. stercoralis (pTo determine the occurrence and epidemiological aspects of intestinal parasites among the Parakanã indigenous people in the Paranatinga settlement (in the eastern Amazon Region, parasitological tests were performed in April 1992 and February 1995. One fresh stool specimen was obtained and immediately processed using the Hoffman and direct methods. Some 126 samples were obtained in April 1992 (from a total population of 215 individuals. Some 80.2% (101 of those tested were infected with at least one species of intestinal parasite. Hookworms were found in 33.3%, Ascaris lumbricoides 42.8%, Trichuris trichiura 0.8%, and Strongyloides stercoralis 5.6%. Entamoeba histolytica and Giardia lamblia protozoans were found in 65.0% and 46.8% of those tested, respectively. A second parasitological survey was performed on 174 individuals (from a population of 253 in February 1995. 88.5% were infected. Note that prevalence

  18. Pesquisa del Parasitismo Intestinal y su Tratamiento.

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    Yenis Ramírez González

    2005-01-01

    Full Text Available Se realizó un estudio analítico de corte transversal en pacientes que presentaron síntomas clínicos de parasitosis intestinal u otros aparentemente sanos, de un universo de 187 casos de los cuales 171 fueron positivos y solo 8 resultaron negativos. Los pacientes pertenecen a diferentes comunidades del municipio Manzanillo, Yara, Media Luna, Campechuela, así como pacientes ingresados de diferentes salas del Hospital "Celia Sánchez Manduley" y pacientes con seguimiento en la consulta de gastroenterología. Predominó la parasitosis por Entamoeba histolytica y Giardia Lamblia, en todos los grupos etáreos. Dentro de los helmintos de mayor incidencia se encontró el Enterobius vermiculares. Hubo un mayor porciento de pacientes que consumían agua no potable. Se demostró que la educación higiénica - sanitaria es insuficiente aún. Resultó satisfactoria la terapia con el albendazol para tratar la giardiasis y la helmintiasis. Se obtuvo buenos resultados con fitofármacos obtenidos de la Mirabilis jalapa para tratar algunos de los helmintos mas frecuentes.

  19. Influência da competição intra-específica entre fêmeas e da ausência de hospedeiro no parasitismo de Telenomus remus Nixon (Hymenoptera, Scelionidae sobre ovos de Spodoptera frugiperda (J. E. Smith (Lepidoptera, Noctuidae Influence of females intraspecific competition and lack of host on Telenomus remus Nixon (Hymenoptera, Scelionidae parasitism on Spodoptera frugiperda (J. E. Smith (Lepidoptera, Noctuidae eggs

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    Tatiana R. Carneiro

    2009-01-01

    Full Text Available A competição intraespecífica e a ausência de hospedeiros podem comprometer o sucesso de programas de controle biológico. Assim, este trabalho objetivou avaliar o efeito de diferentes densidades de fêmeas (1, 3, 6 e 9 fêmeas/ 100 ovos e da ausência de hospedeiro no parasitismo de Telenomus remus Nixon (Hymenoptera, Scelionidae em ovos de Spodoptera frugiperda (J. E. Smith (Lepidoptera, Noctuidae. Observou-se aumento no parasitismo de ovos de S. frugiperda por T. remus a partir da densidade 3 fêmeas/ 100 ovos tanto em condições de laboratório (18% quanto em campo (32%, embora o parasitismo causado por densidades maiores que 1 fêmea/100 ovos não foi significativamente diferente. Todavia, isso não causou superparasitismo. Por outro lado, o número de fêmeas produzidas na progênie diminuiu (39% com a maior densidade de fêmeas sob condições de laboratório. Contudo, não verificou-se diferença significativa sob condições de campo. Mesmo após 9 dias de ausência de hospedeiro não houve redução nos índices de parasitismo, permanecendo em torno de 95 ovos parasitados/fêmea/dia. Todavia, no décimo dia pode-se observar redução (40% no número médio de ovos parasitados. Desse modo, a liberação de três fêmeas por 100 ovos é adequada para se obter elevados níveis de parasitismo.Intraspecific competition and lack of host can affect the success of biological control programs. Thus, this work aimed at evaluating the effect of different densities of females (1, 3, 6, and 9 females/100 eggs and the absence of host in the parasitism of Telenomus remus Nixon (Hymenoptera, Scelionidae on Spodoptera frugiperda (J.E. Smith (Lepidoptera, Noctuidae eggs. It was observed an increase in egg parasitism of S. frugiperda by T. remus beyond a density of 3 females/ 100 eggs under laboratory (18% and field (32% conditions, although the parasitism caused by densities greater than 1 female/100 eggs was not significantly different. However

  20. Parasitismo e sítios de diapausa de adultos do percevejo marrom, Euschistus heros na região da Grande Dourados, MS Parasitism and diapause sites of brown stink bug adults, Euschistus heros in the Great Dourados Region, MS, Brazil

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    Karlla Barbosa Godoy

    2010-05-01

    Full Text Available Entre os insetos que atacam a soja, o percevejo marrom Euschistus heros (Fabricius é considerado uma das principais pragas. Os objetivos deste trabalho foram avaliar a ocorrência de parasitismo em adultos do percevejo marrom E. hero, no período de cultivo da soja e de entressafra, e identificar seus sítios de diapausa no período de entressafra, na região da Grande Dourados, Mato Grosso do Sul (MS. Foram coletados adultos do percevejo em lavouras de soja, durante as safras 2004/05 e 2005/06, sendo as coletas realizadas semanalmente. No período de entressafra da soja de 2005 e 2006, foram realizadas inspeções em diferentes ambientes vegetais visando a constatar possíveis sítios de diapausa do percevejo, bem como avaliar a ocorrência de parasitismo nesses ambientes. Em cada coleta, foram individualizados 40 adultos em caixas gerbox contendo Ligustrum lucidum Ait. (Oleraceae, sendo os insetos observados durante um período de 40 dias. Os parasitoides foram armazenados em álcool 70% e encaminhados para identificação. O índice natural de parasitismo de adultos de E. heros amostrados no período de safra e de entressafra de soja variou de 0,0 a 5,0%, considerando-se as diferentes coletas realizadas, sendo Hexacladia smithii Ashmead (Hymenoptera: Encyrtidae a única espécie de parasitoide ocorrente. No período de entressafra, foi verificada maior incidência do percevejo E. heros em folhas secas de mangueira (Mangifera indica L. caídas no chão, evidenciando que esse ambiente é um importante sítio de diapausa para essa praga na região.Among the insects that attack soybeans, brown stink bug Euschistus heros (Fabricius is considered a major pest. The aim of this research was to evaluate the occurrence of parasitism in adults of brown stink bugs E. heros during soybean crop season and to identify diapause sites during the period of soybean absence in the great region of Dourados, MS. Adults of brown stick bugs were collected weekly in

  1. Biologia e parasitismo de Trichogramma atopovirilia Oatman & Platner e Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae em ovos de Spodoptera frugiperda (J.E. Smith (Lepidoptera, Noctuidae Biology and parasitism of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae on eggs of Spodoptera frugiperda (J.E. Smith (Lepidoptera, Noctuidae

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    Eduardo B. Beserra

    2004-03-01

    Full Text Available Comparou-se a capacidade de paratisimo e o desenvolvimento de Trichogramma atopovirilia Oatman & Platner e T. pretiosum Riley visando à seleção da espécie mais adequada para o controle de Spodoptera frugiperda (J. E. Smith. Os experimentos foram conduzidos em laboratório à temperatura de 25±2ºC, U.R. de 70±0% e fotoperíodo de 14L:10E. Tanto T. atopovirilia como T. pretiosum desenvolveram-se bem e mostraram-se adaptados a ovos de S. frugiperda, mesmo após serem criados por várias gerações em ovos de Anagasta kuehniella Zeller. Entretanto, fêmeas de T. atopovirilia foram mais agressivas e de maior especificidade à praga, já que apresentaram maior capacidade de parasitismo em posturas com diferentes barreiras físicas e maior aceitação pelo hospedeiro natural, em relação à A. kuehniella. Por este maior parasitismo e especificidade de T. atopovirilia aos ovos da praga, deve-se dar preferência à utilização desta espécie para controle de S. frugiperda.The parasitism capacity and development of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley were studied in order to select the most suitable species to control Spodoptera frugiperda (J. E. Smith. The experiments were conducted under laboratory conditions at 25±2ºC, 70±10% RH and 14L:10D photoperiod. Both T. atopovirilia and T. pretiosum showed good development and adaptation to S. frugiperda eggs even after being reared for several generations in eggs of Anagasta kuehniella Zeller. However, T. atopovirilia females were more aggressive and showed higher specificity to the pest, with a higher parasitism capacity in eggs laid with different physical barriers and were more accepted by the natural host in comparison with A. kuehniella. Because of the higher parasitism rate and specificity of T. atopovirilia to the pest's egg this species should be given preference to control S. frugiperda.

  2. Seasonal variation of parasitism in pejerrey Odontesthes bonariensis (Atheriniformes, Atherinopsidae from La Viña reservoir (Córdoba, Argentina Variação sazonal do parasitismo em Peixe-rei Odontesthes bonariensis (Atheriniformes, Atherinopsidae no reservatório La Viña, Córdoba, Argentina

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    Miguel Mancini

    2008-03-01

    Full Text Available The pejerrey Odontesthes bonariensis is the most important freshwater fish of Argentina central region. The present study was conducted to describe the seasonal variation of parasitism in O. bonariensis from La Viña reservoir (31º 17'S, 65º 01'W, located in the province of Córdoba, Argentina. Between years 1999 and 2002, 573 fishes were caught, and their parasite infection and relative weight (Wr were assesed. Three parasites were found, Lernaea cyprinacea (Crustacea, Contracaecum spp. larvae (Nematoda and Cangatiella macdonaghi (Cestoda. Overall, Contracaecum spp. prevalence and intensity were very low. Lernaea cyprinacea and Cangatiella macdonaghi prevalences increased during summer and spring (P O peixe rei Odontesthes bonariensis é um peixe de água doce de grande importância na região central da Argentina. O objetivo deste trabalho foi descrever a sazonalidade do parasitismo de O. bonariensis no reservatrio La Viña (31º 17'S, 65º 01'W, província de Córdoba, Argentina. Durante os anos 1999 e 2002 foram capturados 573 peixes. Nestes se fez à avaliação da condição corporal usando como parâmetro o peso relativo e identificaram-se os seguintes parasitos: Lernaea cyprinacea (Crustacea, Contracaecum spp. (Nematoda e Cangatiella macdonaghi (Cestoda. As prevalências e intensidades de Contracaecum spp. foram muito baixas. Houve diferenças nas prevalências de L. cyprinacea e C. macdonaghi na época do ano (P < 0,01, sendo maiores no verão e na primavera, respectivamente. Houve diferenças estacionais na intensidade de L. cyprinacea (P < 0,05 e na densidade de C. macdonaghi (P < 0,01, neste ultimo alcançou-se um valor máximo nas amostras de 32,0 (±22,5 parasitos por cm³ de conteúdo digestivo. Não houve associação entre o parasitismo e o peso relativo dos peixes. Embora haja certa sazonalidade, as diferentes cargas parasitárias encontradas nâo prejudicam a saúde de O. bonariensis enquanto sua condição corporal.

  3. AL Amyloidosis

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    Desport Estelle

    2012-08-01

    Full Text Available Abstract Definition of the disease AL amyloidosis results from extra-cellular deposition of fibril-forming monoclonal immunoglobulin (Ig light chains (LC (most commonly of lambda isotype usually secreted by a small plasma cell clone. Most patients have evidence of isolated monoclonal gammopathy or smoldering myeloma, and the occurrence of AL amyloidosis in patients with symptomatic multiple myeloma or other B-cell lymphoproliferative disorders is unusual. The key event in the development of AL amyloidosis is the change in the secondary or tertiary structure of an abnormal monoclonal LC, which results in instable conformation. This conformational change is responsible for abnormal folding of the LC, rich in β leaves, which assemble into monomers that stack together to form amyloid fibrils. Epidemiology AL amyloidosis is the most common type of systemic amyloidois in developed countries with an estimated incidence of 9 cases/million inhabitant/year. The average age of diagnosed patients is 65 years and less than 10% of patients are under 50. Clinical description The clinical presentation is protean, because of the wide number of tissues or organs that may be affected. The most common presenting symptoms are asthenia and dyspnoea, which are poorly specific and may account for delayed diagnosis. Renal manifestations are the most frequent, affecting two thirds of patients at presentation. They are characterized by heavy proteinuria, with nephrotic syndrome and impaired renal function in half of the patients. Heart involvement, which is present at diagnosis in more than 50% of patients, leading to restrictive cardiopathy, is the most serious complication and engages prognosis. Diagnostic methods The diagnosis relies on pathological examination of an involved site showing Congo red-positive amyloid deposits, with typical apple-green birefringence under polarized light, that stain positive with an anti-LC antibody by immunohistochemistry and

  4. MODIFICACIÓN AL PROCESO DE PRODUCCIÓN MASIVA DE LOS PARASITOIDES Catolaccus grandis Y Catolaccus hunteri

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    Marco Antonio Reyes-Rosas

    2010-01-01

    Full Text Available El presente estudio se realizó con el objetivo de modificar la tecnología de producción masiva de Catolaccus grandis y Catolaccus hunteri, himenópteros parasitoides de Anthonomus grandis el picudo del algodonero en Tamaulipas, México en el 2002. Se determinó la eficiencia del papel toalla para el secado de manos, en el sellamiento de cápsulas moldeadas en cera de hidrocarburos y poliolefina (LCHP, donde se confina al huésped, y evaluar la efectividad del gorgojo del garbanzo Callosobruchus maculatus como hospedante facticio para la cría de ambos parasitoides. Hubo producción masiva de C. grandis y C. hunteri utilizando C. maculatus como huésped y el papel toalla fue efectivo para sellar los orificios de las cápsulas moldeadas en LCHP. La producción masiva de C. grandis y C. hunteri mediante C. maculatus, contribuyó a incrementar la seguridad y facilidad del proceso, además de una significativa reducción de costos. El papel toalla en el sellado de los orificios de las cápsulas moldeadas en LCHP, redujo en un 50% por m2 los costos del proceso, sin afectar la eficiencia del parasitismo y emergencia de C. grandis.

  5. Pautas de comportamiento alimentario y adaptaciones progresivas en los apéndices auxiliares en Agostocaris bozanici y Barbouria yanezi (Crustacea: Decapoda: Caridea: Agostocarididae, Hyppolitidae Norms of feeding behavior and progressive adaptations in auxiliary appendages in Agostocaris bozanici and Barbouria yanezi (Crustacea: Decapoda: Caridea: Agostocarididae, Hyppolitidae

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    Luis M. Mejía-Ortíz

    2010-10-01

    Full Text Available Existen varias características que evidencian las adaptaciones a la vida cavernícola en los crustáceos; las principales son: pérdida de visión, carencia de pigmentación, especialización de estructuras sensoriales y elongación de los apéndices ambulatorios. En consideración a que en la literatura se ha registrado la escasez del alimento como una fuerza evolutiva y que en las cuevas anquihalinas la principal fuente de energía se produce de la acción bacteriana, se realizó un análisis con ayuda de microfotografías para identificar las adaptaciones en los apéndices que los crustáceos de estos ambientes utilizan para comer, pereiópodos quelados y maxilípedos, considerando aquellas especies que viven exclusivamente en áreas con altos niveles de H2S de estos sistemas. Los resultados muestran que Agostocaris bozanici tiene más setas sobre el propodio del tercer maxilípedo mientras que Barbouria yanezi las tiene más fuertes en este apéndice. Pero en el margen interno de los quelípedos de A. bozanici existe una especialización muy particular, ya que muestra una serie de setas largas que posiblemente las usa como una herramienta para separar los microorganismos, quizás ciliados, del sedimento. Se concluye que Barbouria yanezi se alimenta de partículas grandes del material en degradación de la selva tropical circundante, mientras que Agostocaris bozanici tiene una seta desarrollada para comer microorganismos que actúan en la descomposición de este material.There are several adaptations shown by crustaceans to cave life; namely: vision loss, lack of pigmentation, specialization of sensory structures and elongation of ambulatory appendages. Since it has been mentioned in the literature that food scarcity is the evolutionary force and that in anchialine caves the main energy source is produced by bacteria, an scanning electron microscopy analysis was conducted to identify the adaptations in the appendages that these crustaceans

  6. Adaptaciones anatómicas de la escápula y del manguito rotador a las diferentes formas de locomoción en el orden de los primates

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    Bello Hellegouarch, Gaëlle

    2014-01-01

    [spa] La evolución de los primates se caracteriza por cambios significativos en la función de las extremidades anteriores, que se fueron volviendo menos relevantes para soportar el peso corporal y más importantes a la hora de proporcionar estabilidad, agarre y manipulación en un medio arbóreo discontinuo, aumentando su movilidad y precisión. En este contexto, la función principal del hombro ha sido proporcionar la movilidad necesaria para alcanzar los soportes irregulares, manteniendo al m...

  7. Normativización del Inventario del Desarrollo Comunicativo MacArthur-Bates al español, Colombia

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    María Fernanda Lara Díaz

    2011-01-01

    Full Text Available El Inventario del Desarrollo Comunicativo MacArthur- Bates (CDI Fenson, Marchman, Thal, Dale & Reznick, 2007 es un instrumento que permite evaluar de forma válida y confiable el desarrollo comunicativo y lingüístico de niños pequeños. Este estudio da cuenta del proceso de adaptación del CDI a los usos lingüísticos y al contexto cultural colombiano, así como su primera fase de baremación en la ciudad de Bogotá y sus alrededores. Los padres de 825 niños y niñas entre 8 y 30 meses de edad de diferentes estratos socioeconómicos, residentes en la ciudad de Bogotá y poblaciones aledañas, diligenciaron los inventarios adaptados para la población. El análisis estadístico incluyó medidas de confiabilidad y validez, las cuales avalan la consistencia interna y el valor predictivo de las escalas. Los resultados del presente estudio permiten identificar el ritmo evolutivo del proceso de adquisición del lenguaje en los niños colombianos, observando reorganizaciones y discontinuidades tal y como se reporta en otras adaptaciones del CDI.

  8. Microscale adaptation of the potentiometric method with ion-selective electrode for the quantification of fluoride; Adaptacion a microescala del metodo potenciometrico con electrodo ion selectivo para la cuantificacion de fluoruro

    Energy Technology Data Exchange (ETDEWEB)

    Guevara Ruiz, Paulina; Ortiz Perez, Maria Deogracias [Laboratorio de Bioquimica, Facultad de de Medicina, Universidad Autonoma de San Luis Potosi, San Luis Potosi, San Luis Potosi, (Mexico)]. E-mail: mdortiz@uaslp.mx

    2009-05-15

    Similarly to other countries, ground water from Mexico is naturally polluted by fluoride. The main effects of fluoride at typical ground water concentrations are dental fluorosis, neurological deficits and reproductive disorders. In order to verify that the fluoride concentration is within the allowed guideline in Mexico (NOM 127 and 201), it is important to monitor fluoride levels in water and commercial beverages. The aim of this work is to develop a modification of the standard potentiometric method for fluoride determination in water, in order to reduce costs and amount of potentially toxic waste substances. Both methods were validated, the standard potentiometric method with the ion selective electrode and the microscale modification proposed in this paper. The methods were compared using statistic tests and graphics, followed by the comparison of 125 samples of commercial bottled water sold in the city of San Luis Potosi. Optimal results were obtained for the validation of both methods, and the microscale modification showed statistically identical results to those obtained with the standard method in all samples of bottled water. The microscale modification is a good alternative for fluoride assessment in water and beverages, and it represents a 95 % reduction of costs and chemical waste. [Spanish] En varios paises, incluido Mexico se presenta una contaminacion natural con fluoruro en agua subterranea; los principales efectos en la salud observados en poblacion expuesta a concentraciones mayores al valor permisible (que en Mexico es de 1.5 mg/L) son la fluorosis dental y esqueletica, asi como dano reproductivo y neurologico. En varios estados de la republica Mexicana, este problema es aun desconocido, de ahi la necesidad de evaluar las concentraciones de fluoruro en agua de consumo en varias comunidades. Asi, el objetivo de este trabajo es desarrollar un metodo a microescala para la determinacion de fluoruro en agua, que al reducir la cantidad de reactivo y

  9. Adaptaciones metodológicas en la aplicación del análisis estratigráfico constructivo: el Santuario de San Juan de la Penyagolosa (Castellón y la iglesia de San Juan de los Reyes en Granada

    Directory of Open Access Journals (Sweden)

    Mileto, Camilla

    2003-12-01

    Full Text Available This text presents two cases of the application of stratigraphic wall study in which two specific adaptations, stemming from the original case of the building analysed, were developed. In the first case, the study of the Santuario de San Juan de la Peñagolosa, the notable size of the shrine meant that data collection and management were highly complex. For this reason, a methodology was tested whereby information was hierarchized, allowing it to be managed faster and more efficiently. In the second case, the study of the church of San Juan de los Reyes, a complementary study was carried out in addition to the stratigraphic wall study. The same construction technique used in the building (wall stonework with brick buttresses and limestone boulder caissons brought about the possibility of carrying out a study of the distribution of the weep holes.En este texto se presentan dos casos de aplicación del estudio estratigráfico constructivo en los cuales se desarrollaron dos adaptaciones específicas ocasionadas por el caso concreto del edificio analizado. En el primer caso, el estudio del Santuario de San Juan de la Peñagolosa, la notable dimensión del conjunto conllevaba una complejidad de recogida y gestión de la información. Por esta razón, se ensayó una metodología de jerarquización de la información que permitiera una gestión de la misma más rápida y eficaz. En el segundo caso, el estudio de la iglesia de San Juan de los Reyes, además del estudio estratigráfico se realizó un estudio complementario. La misma técnica utilizada en el edificio (fábricas de machones de ladrillo y cajones de cantos rodados y cal sugirió la posibilidad de realizar el estudio del ritmo de la distribución de los mechinales.

  10. Abu al-Layth al-Libi

    Science.gov (United States)

    2015-02-01

    weaponry, antiaircraft missiles) and explosives, first aid, topography ; and lectures by jihadi preachers.9 Given that al-Libi was originally groomed in...antiaircraft guns, explosives, grenades and topography . See “Embassy Bombing Documents Offer Window into al Qaeda Operations,” Intelwire, 15 January 2011...was the commander of the military operations in al-Qa`ida. `Abdallah Sa`id was killed by an U.S. drone airstrike in North Waziristan in mid

  11. Intra-specific brood parasitism revealed by DNA micro-satellite analyses in a sub-oscine bird, the vermilion flycatcher Parasitismo intraespecífico revelado mediante análisis de microsatélites de ADN en un ave suboscina, el cardenalito o saca tu real

    Directory of Open Access Journals (Sweden)

    ALEJANDRO A RÍOS-CHELÉN

    2008-03-01

    ón extrapareja. En este estudio nos preguntamos si ocurre o no la reproducción extrapareja en el cardenalito o saca tu real (Pyrocephalus rubinus, un suboscino sexualmente dimórfico y socialmente monógamo. Reportamos casos de paternidad extrapareja, maternidad extrapareja y parasitismo intraespecífico, y discutimos nuestros resultados bajo la luz de otros estudios en paserinos

  12. Occurrence of parasitism by Dioctophyma renale in ring-tailed coatis (Nasua nasua of the Tiete Ecological Park, São Paulo, Brazil Ocorrência de parasitismo por Dioctophyma renale em quati (Nasua nasua do Parque Ecológico Tietê, São Paulo

    Directory of Open Access Journals (Sweden)

    Liliane Milanelo

    2009-12-01

    Full Text Available Dioctophymosis is a worldwide renal parasitosis caused by the Dioctophyma renale nematode, which results in progressive destruction of renal tissue. Aquatics annelids are considered the main intermediate hosts and the literature refers as permanent hosts of dogs, wild mammals and even humans. During procedures for population control of coatis (Nasua nasua in the Ecological Park of Tietê (PET, was noticed the presence of parasitosis by D. renale. From 68 animals, males and females, young and adults, submitted to exploratory laparotomy, 51 were positive for the presence of worms, 9 were found only in the right kidney. In 10 cases, in addition to right kidney parasitism, worms were also observed in the abdominal cavity. In 24 cases D. renale was found only in the abdominal cavity and in 8 animals the right kidney was reduced to a small rigid structure. The study showed that the preferred site for parasitism of the worm, considered erratic, was the abdominal cavity in 66.66% of the cases.A dioctofimose é uma parasitose renal causada pelo nematóide Dioctophyma renale conhecida por gerar a destruição progressiva do parênquima renal. Anelídeos de água doce são considerados os principais hospedeiros intermediários e a literatura refere como hospedeiros definitivos cães domésticos, mamíferos selvagens e até seres humanos. Durante procedimentos de controle populacional de quatis (Nasua nasua no Parque Ecológico do Tietê (PET, evidenciou-se a presença do parasitismo por D. renale. Sessenta e oito animais foram submetidos à laparotomia, machos e fêmeas, jovens e adultos, dos quais 51 foram positivos para presença do parasita. Em 9 animais o parasita esteve presente apenas no rim direito; em 10 animais D. renale parasitava o rim direito e a cavidade abdominal simultaneamente. Em outros 24 quatis o parasita foi encontrado apenas na cavidade abdominal e em 8 animais o rim direito foi reduzido apenas a uma pequena estrutura rígida. O estudo

  13. Efeito do número de liberações de Trichogramma galloi (Zucchi, 1988 no parasitismo de ovos de Diatraea saccharalis (Fabr., 1794 Effect of the number of Trichogramma galloi (Zucchi, 1988 releases on egg parasitization of Diatraea saccharalis (Fabr., 1794

    Directory of Open Access Journals (Sweden)

    P.S.M. Botelho

    1995-04-01

    Full Text Available O trabalho teve por objetivo estudar o efeito do número de liberações semanais de Trichogramma galloi Zucchi, 1988, em áreas de cana-de-açúcar sucessivamente infestadas com ovos de Diatraea saccharalis (Fabr., 1794. Foram conduzidos experimentos com a variedade RB 72454, com seis e nove meses de idade, em duas regiões distintas, espaçamento de l,40m, sendo por região, demarcadas quatro áreas de um hectare, delimitando-se no centro delas, uma parcela com 400 m². Cada parcela foi, por três semanas consecutivas, infestada com 25 casais de D. saccharalis, liberando-se T. galloi da seguinte forma (tratamentos: 1. sem liberação (testemunha; 2. uma liberação logo após a primeira infestação artificial; 3. duas liberações, uma logo após a primeira infestação artificial e outra após a segunda infestação com intervalo de sete dias; 4. três liberações, cada uma logo após a infestação artificial a intervalos semanais. Pôde-se concluir, para ambos os experimentos, que para se manter elevado o parasitismo de ovos, por T. galloi, no período crítico de oviposição de D. saccharalis, são necessárias liberações sucessivas do parasitóide.This work was carried out to study the effect of weekly releases of Trichogramma galloi Zucchi, 1988 on egg parasitism of the sugarcane borer, Diatraea saccharalis (Fabr., 1794. The research was conducted in two distinct regions of the State of São Paulo, Brazil, using the sugarcane variety RB 72454, six and nine months old, cultivated in a spacing of 1.40m. The experimental plots were artificially infested with sugarcane borer eggs on a weekly basis during 3 weeks, as following: a - Control (no releases; b - one T. galloi release after the first egg infestation; c - two T. galloi releases: one after the first egg infestation and the other following the second egg infestation; d - three weekly releases of T. galloi. The results showed that weekly releases are necessary to maintain high

  14. Adaptaciones y arreglos de tres pasillos para duo de guitarra

    OpenAIRE

    Peñarreta Suarez, Jahndry Javier

    2014-01-01

    La presente tesis abordará en primer lugar la incursión del pasillo en el Ecuador hasta su nacionalización, para poder entender porque con el transcurso del tiempo el pasillo y no otro género ecuatoriano se convirtió en un representante musical en nuestro país. De igual modo se abordará una breve historia y recursos instrumentales de la guitarra para disponer de herramientas para realizar los arreglos de los temas seleccionados, así como los recursos propios de la ejecución popular del pasil...

  15. ADAPTACION DE ESPECIES DE BAMBU DE CLIMA TEMPLADO EN CHILE

    OpenAIRE

    CAMPOS ROASIO, JORGE NELSON

    2005-01-01

    Hasta la fecha no se había estudiado la posibilidad de adaptar especies exóticas de las mejores especies de bambú, a las condiciones agroclimáticas de Chile con fines industriales. Sólo había pequeñas muestras de adaptación de algunas especies, las que fueron traídas a Chile básicamente con fines ornamentales. Considerando estos antecedentes y la existencia a nivel mundial de más de 1.300 especies, algunas de las cuales se desarrollan en climas templados, se desarrolló el proyecto “Adap...

  16. Adaptaciones institucionales en la época neoliberal

    Directory of Open Access Journals (Sweden)

    Carlos Riojas

    2010-01-01

    Full Text Available El ensayo propone seguir los planteamientos teóricos del institucionalismo original y nuevo con el objetivo de establecer un diálogo entre ambas perspectivas. Con base en lo anterior, se hacen algunas precisiones sobre el término "institución", se exploran las posibilidades de llevar a cabo un análisis comparativo entre los procesos de transformación sistémica en Europa Central y América Latina durante la época neoliberal y los eventos que giraron en torno a 1989. Por lo tanto, se explica cuáles son los fines que persiguen los enfoques derivados del institucionalismo original y nuevo. Además, se intenta aclarar las relaciones conceptuales que se establecen con otros enfoques que estudian las instituciones. También se abordan algunos fundamentos teóricos de los institucionalismos, así como las diversas vertientes. Asimismo, se aclaran los límites básicos que enfrentan las aproximaciones teóricas en cuestión. Por último, se responde lo siguiente: ¿por qué son pertinentes estas perspectivas para estudiar la transformación sistémica en Europa Central y el ajuste estructural en América Latina?

  17. /Cu-Al System

    Science.gov (United States)

    Kish, Orel; Froumin, Natalya; Aizenshtein, Michael; Frage, Nachum

    2014-05-01

    Wettability and interfacial interaction of the Ta2O5/Cu-Al system were studied. Pure Cu does not wet the Ta2O5 substrate, and improved spreading is achieved when relatively a high fraction of the active element (~40 at.% Al) was added. The Al2O3 and AlTaO4 phases were observed at the Ta2O5/Cu-Al interface. A thermodynamic evaluation allowed us to suggest that the lack of wetting bellow 40 at.% Al is due to the presence of a native oxide, which covers the drop. The conditions of the native oxide decomposition and the formation of the volatile Al2O suboxide strongly depend on the vacuum level during sessile drop experiments and the composition of the Cu-Al alloy. In our case, Al contents greater than 40% provides thermodynamic conditions for the formation of Al2O (as a result of Al reaction with Al2O3) and the drop spreading. It was suggested that the final contact angle in the Ta2O5/Cu-Al system (50°) is determined by Ta adsorption on the newly formed alumina interlayer.

  18. Adaptaciones fisiológicas en algunas especies de mangles Adaptaciones fisiológicas en algunas especies de mangles

    Directory of Open Access Journals (Sweden)

    Polanía Jaime

    1990-06-01

    Full Text Available

    The role of manitol and proline on the osmotic balance of Aegiceras corniculatum, Aegialitis annul ata and Laguncularia racemosa were studied. Mangrove plants were grown in hydroponic cultures for several years before using them for the experiments described here. The plants grown in different salt concentrations and "shock" treatments were divided in their parts and the ion concentrations of the low molecular weight compounds of each part were analysed. High concentrations of osmotic compounds were found in all plant parts. The role of mannitol, as an overall osmotic compound, is discussed.

    Se estudia el papel del manitol, as! como de la prolina en el equilibria osmótico de Aegiceras corniculatum, Aegialitis annulata y Laguncularia racemosa , tres especies de mangles. Las plantas crecieron en cultivo hidropónico por varios años, antes de ser sometidas a los experimentos aquí reseñados. Plantas sometidas a tratamientos de diferentes salinidades, así como de "choque", fueron divididas en sus partes y en ellas se analizaron las concentraciones de los principales iones y de los compuestos de bajo peso molecular. Concentraciones altas de metabolitos fueron detectadas en todas las partes de las plantas bajo estudio. Se discute el papel del manitol como compuesto osmótico global.

  19. Amyotrophic Lateral Sclerosis (ALS)

    Science.gov (United States)

    ... ALS Neurons' broken machinery piles up in ALS Esclerosis Lateral Amiotrófica Dormant viral genes may awaken to ... Dementia Information Page Multifocal Motor Neuropathy Information Page Multiple Sclerosis Information Page Muscular Dystrophy Information Page Myasthenia ...

  20. Aussprache als motorische Fertigkeit

    DEFF Research Database (Denmark)

    Bonner, Maria

    2013-01-01

    Authentische Aussprache gilt im Fremdsprachenunterricht als schwer erreichbares Ziel, fremdsprachlicher Akzent wird als nahezu unvermeidbar gesehen. Weder die Hypothese einer kritischen Periode für den Erwerb einer authentischen Aussprache noch das Konzept der Fossilierung im Sprachlernprozess...

  1. Apoyo científico al entrenamiento. Un caso práctico de diseño y aplicación de apoyo al alto rendimiento

    Directory of Open Access Journals (Sweden)

    José Manuel Palao Andrés

    2012-12-01

    Full Text Available El apoyo científico consiste en la ayuda en el registro, toma de datos o realización de procesos de valoración y/o toma de decisiones a los entrenadores, deportistas, y/o equipos deportivos a través de procedimientos científicos. Su realización supone importantes modificaciones y adaptaciones de los protocolos seguidos por los investigadores en sus laboratorios. El presente trabajo describe y explica mediante un caso práctico cuales son los pasos y adaptaciones que se deben efectuar por entrenadores e investigadores para realizar este trabajo cooperativo. Se debe tener siempre presente que el objetivo del apoyo científico es lograr incrementar el rendimiento de los deportistas, y no que los deportistas sean utilizados como sujetos de una investigación.

  2. Influência do parasitismo por monogeas no desenvolvimento de tilápias-do-Nilo (Oreochromis niloticus (Linnaeus, 1757 criadas em sistemas de tanques-rede na represa de Capivara, PR The influence of branchial parasitism by monogenoid trematodes on the development of Nile tilapia(Oreochromis niloticus Linnaeus, 1757 bred in net-pond systems in Capivara Dam, PR

    Directory of Open Access Journals (Sweden)

    Rodrigo Zanolo

    2009-03-01

    Full Text Available Neste trabalho foi avaliada a influência do parasitismo branquial por monogenóideos no desenvolvimento de tilápias-do-nilo criadas em 4 tanques-rede, com volume de 4 m3 cada, durante aproximadamente 5 meses. Os peixes juvenis, apresentando peso médio inicial de 37,65 g provenientes de outras pisciculturas, foram estocados na densidade de 250 animais.m-3 e monitorados mensalmente até sua comercialização com peso médio final de 485,4 g. A prevalência desses ectoparasitas apresentou-se alta, entre 90 e 100% em todos os meses. Os maiores valores de intensidade média de infestação - IMI e abundância média de infestação - AM ocorreram durante os 2 primeiros meses de cativeiro, apresentando um novo aumento no último mês de criação. Os únicos parasitos da classe Monogenoidea presentes nas brânquias dos animais examinados foram da família Dactylogyridae. Os valores de oxigênio dissolvido, temperatura, pH, nitrito e amônia estiveram dentro da normalidade. Nessas condições, não houve diferenças significativas entre o fator de condição relativo - Kn médio entre os animais parasitados e não parasitados e também nos diferentes níveis de infestação. Assim mostrou que, dentro dessas condições de criação, a relação parasito-hospedeiro-ambiente apresentou- se em equilíbrio sem causar grandes prejuízos aos animais.Tilapias are fish originally from Africa which nowadays are commercially bred in almost 100 countries, being one of the most commercially bred species in the world. In this work the trematode population of the monogenoidea group present in the branchiae of Nile tilapias bred in 4 net-ponds with volume of 4 m3 each, was monitored during 5 months. The juvenile fish, presenting initial average weight of 37.65 g originated from other piscicultures, were stocked in the density of 250 animals.m-3 and monthly monitored until their commercialization, with final average weight of 485.4 g. The prevalence of these

  3. Efecto del parasitismo del isópodo bopírido Ionella agassizi (Isopoda: Epicaridea (Bornnier, 1900 sobre la fisiología nutricional del nape Neotrypaea uncinata (M. Edwards, 1837 (Decapoda: Thalassinidea Effects of parasitism in nutritional physiology of the ghost shrimp Neotrypaea uncinata parasitized by the isopod Ionella agassizi

    Directory of Open Access Journals (Sweden)

    Lorena P. Astete-Espinoza

    2000-06-01

    Full Text Available El nape Neotrypaea uncinata se encuentra parasitado en sus branquias por el isópodo Ionella agassizi. Trabajos anteriores han señalado que I. agassizi provoca un efecto negativo en la biología reproductiva del nape, afectando significativamente tanto el desarrollo de los órganos reproductores como la expresión de las características sexuales secundarias. Lo anterior podría estar asociado a una disminución de las sustancias de reserva de N. uncinata, afectando de esta manera su metabolismo. En este trabajo se determinaron las concentraciones de metabolitos relacionados con el estado nutricional de N. uncinata (proteínas totales, hemocianina, lactato y glucosa; además se evaluó el porcentaje de lípidos en el tejido del hospedador. Los resultados obtenidos indican una mayor frecuencia de infección en machos adultos, lo que sugiere la existencia de mortalidad diferencial en el hospedador. Se determinó una menor masa corporal en los individuos parasitados en comparación con los no parasitados. En relación con la concentración de metabolitos: se determinó una disminución de los niveles de proteínas totales y de las concentraciones de hemocianina, lo que evidencia un efecto importante del parasitismo a nivel nutricional. Además, se encontró una concentración menor de lactato en individuos parasitados asociado a una alta concentración de glucosa, lo cual sugiere la utilización del lactato como sustrato para la síntesis de glucosa en presencia del parásito. Finalmente la reducción de los lípidos en individuos parasitados evidencia la carencia de sustancias de reserva.The ghost shrimp Neotrypaea uncinata is parasitized in the branchial chamber for the isopod Ionella agassizi. Previous works had indicated that the parasite causes a negative effect in the reproductive biology of the ghost shrimp, influencing seriously the development of reproductive organs and the expression of secondary sexual characteristics. This effect can

  4. Volver al desarrollo

    Directory of Open Access Journals (Sweden)

    Jaime Ornelas Delgado

    2012-01-01

    Full Text Available El desarrollo, categoría empleada para expresar el crecimiento económico, surge durante la "guerra fría" y si bien fue propuesta por teóricos metropolitanos, se asumió en Latinoamérica como parte de los instrumentos disponibles para lograr el crecimiento y alternativa al socialismo. El desarrollo mantuvo su vigencia entre 1945 y 1975, cuando al advenimiento del neoliberalismo fue paulatinamente retirado de la agenda de las preocupaciones nacionales e internacionales. Al iniciarse el siglo xxi, el fracaso del mercado autorregulado trajo de nueva cuenta al debate los problemas del desarrollo, lo que obliga a revisarlo críticamente, tanto como al concepto mismo para mostrar su carácter colonial, si se quiere construir caminos ajenos al neoliberal y superar los problemas que han hecho de Latinoamérica una de las regiones más desiguales del mundo.

  5. Pornographie als Metapher

    Directory of Open Access Journals (Sweden)

    Caroline Schubarth

    2010-02-01

    Full Text Available In diesem Artikel werden unterschiedliche metaphorische Verwendungen des Pornografiebegriffs und deren Implikationen untersucht. Während die Existenz von Pornografie der feministischen Anti-Porno-Bewegung als Erklärung für die anhaltende Diskriminierung von Frauen in westlichen Gesellschaften dient, nutzen rechtskonservative Kräfte den Pornografievorwurf als Rechtfertigung für die Zensur von als deviant empfundenen Identitäten und sexuellen Praktiken.

  6. Factores asociados a parasitismo gastrointestinal en guanacos silvestres (Lama guanicoe)

    OpenAIRE

    Moreno, Pablo Gastón

    2015-01-01

    Fil: Moreno, Pablo Gastón. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina. Recientes investigaciones han demostrado que el estado de salud en animales silvestres es crucial para modular las dinámicas de infección de las enfermedades. Existe un sinergismo entre la condición fisiológica, el sistema inmunológico de un individuo y su susceptibilidad para contraer enfermedades. La meta de esta tesis fue investigar los factores determinantes de abundanc...

  7. Parasitismo gastrointestinal en un bioterio canino en venezuela

    National Research Council Canada - National Science Library

    Quijada, Jéssica; Bethencourt, Angélica; Pérez, Arlett; Vivas, Isis; Aguirre, Aixa; Reyes, Yuraima

    2008-01-01

    La “Sección de Caninos, Felinos y Batracios” del Bioterio la Facultad de Ciencias Veterinarias de la Universidad Central de Venezuela, cumple un papel fundamental en la docencia y la investigación en esta institución...

  8. Parasitismo gastrointestinal en un bioterio canino en Venezuela

    National Research Council Canada - National Science Library

    Pérez, Arlett; Reyes, Yuraima; Aguirre, Aixa; Quijada, Jessica; Bethencourt, Angélica; Vivas, Isis

    2009-01-01

    La Sección de Caninos, Felinos y Batracios del Bioterio la Facultad de Ciencias Veterinarias de la Universidad Central de Venezuela, cumple un papel fundamental en la docencia y la investigación en esta institución...

  9. Ogunsile et al (18)

    African Journals Online (AJOL)

    USER

    The effects of time and the volume of extract to silver salt solution were investigated on the ... agar well diffusion method. XRD analysis ... attributed to their large surface area to volume ratio (Cho et al., 2005; Mittal et al., 2013). Synthetically ...

  10. Gezondheid als marketinginstrument

    NARCIS (Netherlands)

    Vijver, van de L.P.L.; Berg, van den I.

    2008-01-01

    Is biologisch voedsel beter dan gangbaar? Hoe hard zijn de bewijzen daarvoor? En hoe sterk moet het bewijs zijn voordat je het als claim op een product mag zetten? In dit Biokennis bericht een overzicht van de wetenschappelijke conclusies en de mogelijkheden om biologisch te promoten als beter, neer

  11. Alles is al uitgevonden

    NARCIS (Netherlands)

    J.G.M. van Marrewijk (Charles)

    1996-01-01

    textabstractDe voordelen van vrijhandel zijn zeer beperkt, al-thans als we de empirische schattingen van vooraanstaande economen en internationale organisaties mogen geloven. Zo worden de voordelen van liberalisatie voor de Europese Unie geraamd op ongeveer 0,5% van het bnp 1. De door het IMF gescha

  12. Initial Symptoms of ALS

    Science.gov (United States)

    ... Research In Your Community Advocate Get Involved Donate Symptoms and Diagnosis En español Symptoms The initial symptoms of ALS can be quite ... the eyes and bladder are generally not affected. Diagnosis ALS is a difficult disease to diagnose. There ...

  13. Interview als Text vs. Interview als Interaktion

    Directory of Open Access Journals (Sweden)

    Arnulf Deppermann

    2013-09-01

    Full Text Available Das Interview ist nach wie vor das beliebteste sozialwissenschaftliche Verfahren des Datengewinns. Ökonomie der Erhebung, Vergleichbarkeit und die Möglichkeit, Einsicht in Praxisbereiche und historisch-biografische Dimensionen zu erhalten, die der direkten Beobachtung kaum zugänglich sind, machen seine Attraktivität aus. Zugleich mehren sich Kritiken, die seine Leistungsfähigkeit problematisieren, indem sie auf die begrenzte Reichweite der Explikationsfähigkeiten der Befragten, die Reaktivität der Erhebung oder die Differenz zwischen Handeln und dem Bericht über Handeln verweisen. Im Beitrag wird zwischen Ansätzen, die das Interview als Text, und solchen, die es als Interaktion verstehen, unterschieden. Nach dem Text-Verständnis werden Interviews unter inhaltlichen Gesichtspunkten analysiert und als Zugang zu einer vorgängigen sozialen oder psychischen Wirklichkeit angesehen. Das Interaktions-Verständnis versteht Interviews dagegen als situierte Praxis, in welcher im Hier und Jetzt von InterviewerInnen und Befragten gemeinsam soziale Sinnstrukturen hergestellt werden. Anhand ubiquitärer Phänomene der Interviewinteraktion – Fragen, Antworten und die Selbstpositionierung von InterviewerInnen und Befragten – werden Praktiken des interaktiv-performativen Handelns im Interview dargestellt. Ihre Relevanz für die Interviewkonstitution und ihre Erkenntnispotenziale für die Interviewauswertung werden aufgezeigt. Es wird dafür plädiert, die interaktive Konstitutionsweise von Interviews empirisch zu erforschen und methodisch konsequent zu berücksichtigen. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1303131

  14. Suplementação com DL-α acetato de tocoferila e parasitismo por Anacanthorus penilabiatus (Monogenea: Dactylogyridae em Piaractus mesopotamicus (Osteichthyes: Characidae - DOI: 10.4025/actascianimsci.v27i1.1244 Supplementation with DL-α tocopheryl acetate and parasitism by Anacanthorus penilabiatus (Monogenea: Dactylogyridae in Piaractus mesopotamicus (Osteichthyes: Characidae - DOI: 10.4025/actascianimsci.v27i1.1244

    Directory of Open Access Journals (Sweden)

    Vando Edésio Soares

    2005-03-01

    Full Text Available O índice de parasitismo por Anacanthorus penilabiatus foi estudado em 126 pacus jovens, Piaractus mesopotamicus (peso inicial de 95,71 ± 24,23 g e peso final 155,76 ± 28,62 g, provenientes de mesma desova, naturalmente parasitados. Os peixes foram distribuídos aleatoriamente em três tratamentos de 42 animais cada e submetidos à suplementação com zero mg, 100 mg e 450 mg de DL-α acetato de tocoferila/kg de ração, alimentados duas vezes ao dia, por 18 semanas. Após este período, as brânquias foram avaliadas quanto à presença do parasito e amostras de sangue coletadas. Apesar de 100% dos pacus analisados apresentarem monogenea, não se observou diferença estatística (p > 0,05 quanto ao índice de parasitismo entre os grupos. Todavia, os animais que receberam a vitamina E apresentaram menores contagens de parasitos nas brânquias. Da mesma forma, os peixes alimentados com baixos níveis de vitamina E não diferiram estatisticamente (p > 0,05 dos tratados com DL-α acetato de tocoferila (100 mg/kg e 450 mg/kg quanto à contagem global de eritrócitos, hematócrito e volume corpuscular médio. A suplementação alimentar com vitamina E não interferiu no desempenho produtivo de pacusThe rates of Anacanthorus penilabiatus parasitism were investigated in 126 pacus, (Piaractus mesopotamicus -with initial weight of 95.71 ± 24.23 g and final weight of 155.76 ± 28.62 g, from the same spawn and naturally infested. Fishes were randomly distributed among three groups of 42 animals each and submitted to treatment with 0, 100 and 450 mg of DL-α tocopheryl acetate/Kg of dry diet, fed twice a day during 18 weeks. The gills were evaluated according to the presence of parasites and collected blood samples. Although 100% of pacus examined were parasited, the results did not show statistical difference (P > 0.05 for parasite counting among the groups treated. Therefore, fish supplemented with vitamin E demonstrated lower parasites counts. In the

  15. Volver al desarrollo

    OpenAIRE

    Jaime Ornelas Delgado

    2012-01-01

    El desarrollo, categoría empleada para expresar el crecimiento económico, surge durante la "guerra fría" y si bien fue propuesta por teóricos metropolitanos, se asumió en Latinoamérica como parte de los instrumentos disponibles para lograr el crecimiento y alternativa al socialismo. El desarrollo mantuvo su vigencia entre 1945 y 1975, cuando al advenimiento del neoliberalismo fue paulatinamente retirado de la agenda de las preocupaciones nacionales e internacionales. Al iniciarse el siglo xxi...

  16. Tussentijds Toetsen als Leerstrategie

    NARCIS (Netherlands)

    Dirkx, Kim; Kester, Liesbeth; Kirschner, Paul A.

    2013-01-01

    Dirkx, K. J. H., Kester, L., & Kirschner, P. A. (2013, April). Tussentijds toetsen als Leerstrategie [Testing as Learning Strategy]. Presentation at the Miniconference on Assessment from the Mastersprogram Educational Sciences, Heerlen, The Netherlands.

  17. Ileke et al (5)

    African Journals Online (AJOL)

    big timmy

    extracts of the stem bark are commonly used to treat malaria and ... 2013). Aqueous extracts of the leaf and stem bark ... Ileke et al.: Toxicological and Histopathological Effects of Cheese Wood ..... to reduced production of the metabolic product.

  18. Sociale media als leermiddel

    NARCIS (Netherlands)

    Rubens, Wilfred

    2012-01-01

    Rubens, W. (2012, 5 juni). Sociale media als leermiddel. Presentatie over het gebruik van sociale media binnen het onderwijs, verzorgd tijdens een ouderraadbijeenkomst van de Katholieke Scholengemeenschap Etten-Leur, Etten-Leur, Nederland.

  19. Amyotrophic lateral sclerosis (ALS)

    Science.gov (United States)

    Lou Gehrig disease; ALS; Upper and lower motor neuron disease; Motor neuron disease ... 98. Shaw PJ. Amyotrophic lateral sclerosis and other motor neuron diseases. In: Goldman L, Schafer AI, eds. Goldman's Cecil ...

  20. Ismail et al (6)

    African Journals Online (AJOL)

    USER

    ... pumps selection as well as provide necessary information for water, hydraulics, mechanical and .... The analysis of hydraulic and design ... design; Tay et al. ...... Energetical optimization of water ... Wood D J,1981 Algorithms for pipe network.

  1. Analyzing Al Qaedaism

    Institute of Scientific and Technical Information of China (English)

    Yuan Hua

    2008-01-01

    Three major events are responsible for the rampancy today of Al Qaedaism, the doctrine of Al Qaeda, an Islam extremist organization. They are: the Anti-Soviet Afghanistan War for the birth of the group; the September 11 terrorist attacks for the spread of its extremist demagogy and the war on terror for its branches networking into alliances worldwide.Al Qaedaism aims at driving away Western forces on the Moslem lands, overthrowing local Pro-West regimes, destroying Israel and setting up a Caliphate empire. Its rampancy has resulted from a combination of diverse factors at work under specific historical conditions rather an inevitable outcome of the growth of the Islam religion.As an ideological weapon for launching Jihad to oust Western influence and topple local regimes, Al Qaedaism reflects an extremist portrayal of modern Islam society, politics, economy and culture.

  2. Advanced Light Source (ALS)

    Data.gov (United States)

    Federal Laboratory Consortium — The Advanced Light Source (ALS), a world leader in soft x-ray science, generates light in the wavelengths needed for examining the atomic and electronic structure of...

  3. Trauer als Biografiegenerator

    OpenAIRE

    Winkel, Heidemarie

    2008-01-01

    Der Tod eines Alter Ego erweist sich für Trauernde als gravierende Kontingenzerfahrung. Sie vermag das individuelle Selbstverständnis in umfassender Weise zu erschüttern, wobei sich Trauer als Schmerz von unvergleichlicher Intensität und Tiefe konstituiert. Die emotionale Erfahrung wird hierbei – nach Maßgabe psychologischer und therapeutischer Vorstellungen – zum Ausgangspunkt und zum Maßstab individueller Selbstvergewisserung. Diese Auffassung von Trauer korrespondiert mit einer allgemeinen...

  4. Leakage current behaviors of Al/ZrO2/Al and Al/YSZ/Al devices

    Science.gov (United States)

    Yeh, Tsung-Her; Lin, Ruei-De; Cherng, Bo-Ruei; Cherng, Jyh-Shiarn

    2015-01-01

    The leakage current behaviors of Al/ZrO2/Al and Al/yttria stabilized zirconia (YSZ)/Al devices are investigated for resistive random access memory (RRAM) applications. A silicon oxide layer (450 nm) is first formed on a Si wafer by thermal oxidation. Onto it an Al bottom electrode (270 nm), a ZrO2 or YSZ nano-film (75 nm), and an Al top electrode (270 nm) are sequentially deposited by sputtering. These RRAM devices exhibit ohmic behaviors in the low-field region, while Schottky and Poole-Frenkel emissions take over in the high-field regions. Both the Schottky and trap barrier levels are decreased when monoclinic ZrO2 is replaced by cubic YSZ in the metal/oxide/metal structure. This is attributed not only to the higher symmetry crystal structure and lower binding energy of YSZ, but also to the formation of more oxygen vacancies and their re-distribution associated with yttria doping.

  5. Cuidando al adulto y al anciano

    Directory of Open Access Journals (Sweden)

    Alba Lucero López Díaz

    2003-01-01

    Full Text Available El propósito del artículo es describir, desde el ámbito universitario, la experiencia en la aplicación de la Teoría del Déficit de Autocuidado (TDAC con la población adulta y anciana. Se explican los procesos y resultados desde la preparación docente, la conformación de la asignatura, hasta el desarrollo de la experiencia práctica en el ámbito hospitalario y de la vida cotidiana. La experiencia muestra la adecuación de la TDAC para abordar el cuidado de esta población y la necesidad de desarrollar otros estudios al respecto.

  6. Características hematológicas e fator de condição relativo (Kn associados ao parasitismo em Schizodon borellii (Osteichthyes, Anostomidae e Prochilodus lineatus (Osteichthyes, Prochilodontidae do ri Hematological characteristics and relative condition factor (Kn associated with parasitism in Schizodon borellii (Osteichthyes, Anostomidae and Prochilodus lineatus (Osteichthyes, Prochilodontidae from Paraná River, Porto Rico region

    Directory of Open Access Journals (Sweden)

    Ricardo Massato Takemoto

    2000-05-01

    Full Text Available Nos meses de fevereiro de 1994 e 1995, foram capturados, na planície de inundação do rio Paraná, PR, Brasil, 42 espécimes adultos de piava, S. borellii, e 42 espécimes adultos de curimbatá, Prochilodus lineatus. O objetivo era verificar as alterações no quadro hemático destas espécies causadas por parasitismo. Foram determinados o número de eritrócitos (Er, o hematócrito (Ht, a taxa de hemoglobina (Hb, a porcentagem de leucócitos e calculados os índices hematimétricos absolutos: volume corpuscular médio, hemoglobina corpuscular média e concentração de hemoglobina corpuscular média. Os parasitos foram coletados de brânquias e intestinos e processados por métodos de rotina. Nove espécimes de S. borellii estavam parasitados por Dactylogyridae nas brânquias, com intensidade média de infestação(IMI=278,3 (1 a 1740 e 16 apresentavam Cucullanus pinnai (Nematoda: Cucullanidae no intestino, com IMI=3,3 (1 a 9. Outros 6 peixes estavam parasitados por Dactylogyridae com IMI=121,5 (2 a 360 e C. pinnai com IMI=2,0 (1 a 4. Onze peixes não apresentaram nenhuma infestação parasitária. Para esta espécie não foi encontrada nenhuma alteração significativa na contagem diferencial dos leucócitos ou na série vermelha, para os peixes parasitados. Os indivíduos com Dactylogyridae foram os únicos que apresentaram célula granulocítica especial e não tinham eosinófilos. Dez espécimens de P. lineatus apresentaram Dactylogyridae nas brânquias com IMI=86,9 (1 a 239, 6 tinham Ergasilidae com IMI=27,5 (1 a 81, 1 estava com 16 Neoechinorhynchus curemai (Acantocephala: Neoechinorhynchidae no intestino e 25 não estavam parasitados. A infestação por Dactylogyridae nas brânquias desta espécie causou apenas uma diminuição na taxa de hemoglobina. Diferenças significativas foram encontradas em Hb e na porcentagem de linfócitos, neutrófilos e monócitos em peixes infestados por Ergasilidae. No espécime com N. curemai foram

  7. Fortschritt als Fortschrittsdiskurs

    Directory of Open Access Journals (Sweden)

    Rainer Schmid-Zartner

    2014-12-01

    Full Text Available Zur Erzielung gesellschaftlichen Fortschritts in demokratisch verfassten Gesellschaften soll die Möglichkeit am Fortschrittsdiskurs teilnehmen zu können für alle Mitglieder der Gesellschaft als selbstverständliche Prämisse gelten. Fortschritt wird also als Bewusstseinsbildung dem Fortschritt selbst gegenüber und als Entscheidungs- und Handlungsfähigkeit auf individueller und gesellschaftlicher Ebene definiert. Dies setzt entsprechende Maßnahmen zur Befähigung dazu voraus, die alle Mitglieder der Gesellschaft erfassen. Dabei ist der Bildungsbereich angesprochen, insbesondere der Schulunterricht. Neben dem in der aktuellen blidungspolitischen Debatte forcierten Fokus auf den Aspekt der Kompetenzorientierung, der hier nicht infrage gestellt wird, ist als notwendige Ergänzung ein reflexionsorientierter Schulunterricht in allen Bildungsfächern einzufordern und umzusetzen. Im Weiteren beschreibt der Text den Weg von der Brauchbarkeit zur Bedeutsamkeit von schulischem Wissen durch Relevanzreflexionsprovokationen im Schulunterricht, um Sinn und Bedeutung der vermittelten Bildungsinhalte zu verhandeln. Am Beispiel von Mathematik als Bildungsfach wird der Inhalt von reflexionsorientertem Unterricht verdeutlicht. Darüber hinaus beschreibt der Text eine Reihe von konkreten Fallbeispielen aus der aktuell versuchsweise durchgeführten Unterrichtspraxis in Mathematik.

  8. Modification of residual stress in Al-[AlBO]w/Al compound plate

    Institute of Scientific and Technical Information of China (English)

    姜传海; 吴建生; 王德尊

    2001-01-01

    The application of compound parts of Al-[AlBO]w/Al not only reduces the cost of the parts but also improves its properties. However, there is a large thermal residual stress between Al and [AlBO]w/Al, and it is harmful for practical application. From the theoretical analyses and experimental results, it was found that by the compressive pre-plastic deformation perpendicular to the interface between Al and [AlBO]w/Al, the interlayer residual stress of compound parts can be reduced, while the mechanical properties of compound parts can be improved.

  9. Altern als Widerstand

    Directory of Open Access Journals (Sweden)

    Roberta Maierhofer

    2005-07-01

    Full Text Available Gullettes kulturwissenschaftliche Untersuchung Aged by Culture ist wie bereits ihre zwei vorangehenden Werke, die sich mit Altern beschäftigen – Safe at Last in the Middle Years: The Invention of the Midlife Progress Novel (1988 und Declining to Decline. Cultural Combat and the Politics of the Middle (1997 –, von großem persönlichen Engagement und durch ein politisches Anliegen motiviert. Sowohl die Dringlichkeit als auch der Widerstand, den Gullette, die sich als „age critic“ definiert, als moralische und politische Notwendigkeit postuliert, werden in der Zweiteilung der Abhandlung angesprochen: „Cultural Urgencies“ und „Theorizing Age Resistantly“. Während Gullette den Begriff „aged by culture“ bereits in Declining to Decline einführt, stellt sie ihn nun in den Mittelpunkt ihrer Untersuchung. Das Buch ist einerseits einer gesellschaftspolitischen Analyse der USA gewidmet, andererseits wird eine Theorie des Widerstands gegenüber Altersdiskriminierung entwickelt.

  10. Pornographie als Metapher

    Directory of Open Access Journals (Sweden)

    Caroline Schubarth

    2010-03-01

    Full Text Available In diesem Artikel werden unterschiedliche metaphorische Verwendungen des Pornografiebegriffs und deren Implikationen untersucht. Während die Existenz von Pornografie der feministischen Anti-Porno-Bewegung als Erklärung für die anhaltende Diskriminierung von Frauen in westlichen Gesellschaften dient, nutzen rechtskonservative Kräfte den Pornografievorwurf als Rechtfertigung für die Zensur von als deviant empfundenen Identitäten und sexuellen Praktiken.This article examines different metaphorical uses of the term pornography and the resulting implications. While the existence of pornography for the feminist anti-porno movement serves as factor in the continuing discrimination of women in western societies, conservative powers on the right use the allegation of pornography as a justification for censorship of those identities and sexual practices deemed deviant.

  11. Der Glaube als Erkenntnisquelle

    Directory of Open Access Journals (Sweden)

    Andrea Hartwig

    2004-03-01

    Full Text Available Seit ihrer Kanonisation 1998 und Ernennung zur Mit-Patronin Europas 1999 steht die 1942 in Auschwitz ermordete Phänomenologin Edith Stein, 1922 vom jüdischen zum christlichen Glauben konvertiert und 1933 als Benedicta vom Kreuz in den Kölner Karmel eingetreten, mehr denn je im Blickfeld der Öffentlichkeit. Die Bedeutung ihrer wissenschaftlichen Arbeit u. a. als Assistentin von Edmund Husserl in Freiburg und als Dozentin am Deutschen Institut für wissenschaftliche Pädagogik in Münster, aber auch in privaten Studien wurden im Juli 2000 im Rahmen eines Symposiums des Internationalen Edith Stein Instituts in Würzburg diskutiert. Die Beiträge der vorliegenden Publikation beleuchten breit gefächert Aspekte des Werks und seiner Interpretation mit dem Ziel, die Philosophin neu zu entdecken und die bisherige Forschung zu intensivieren.

  12. Carta al Editor

    Directory of Open Access Journals (Sweden)

    José Andrés Burgos Zuleta

    2010-06-01

    Full Text Available La medicina al basarse generalmente en la clínica, correlacionaexámenes complementarios y organiza un diagnóstico y tratamiento, es una disciplina donde es imprescindible saber recolectar, analizar, interpretar y concretar una respuesta adecuada, es así que la información que se recibe es esencial para el desempeño médico.La certeza es una realidad que se da en algunas situaciones y enotras las probabilidades establecen conclusiones. Lo normal muchas veces se define sobre la base de criterios estadísticos, basados en riesgos poblacionales que no necesariamente se aplican al caso boliviano.

  13. Selbstkritik als wissenschaftliches Projekt?

    Directory of Open Access Journals (Sweden)

    Barbara Scholand

    2007-11-01

    Full Text Available Wallner kritisiert die aktuelle feministische Darstellung der rund 30jährigen Geschichte der Mädchenarbeit als „Legendenbildung“ (S. 9: Sie verkürze und verschweige im Interesse einer Selbst-Heroisierung und sei daher ideologisch. Als eine derjenigen, die seit zwanzig Jahren feministische Mädchenarbeit und -politik betreibt, arbeitet die Autorin damit auch ihre eigenen (Nicht-Bezugnahmen kritisch auf. Ihr grundlegendes Interesse ist es, eine aus ihrer Sicht erforderliche Neupositionierung der Mädchenarbeit in der Jugendhilfe im Zeitalter von Gender Mainstreaming zu befördern.

  14. MEMORE AL AMIKO

    Institute of Scientific and Technical Information of China (English)

    Osmo; BULLER

    1999-01-01

    Skuis min la novajo, ke mia amiko kajkolego Dai Song’en forlais nin por iam. Lakruela fatalo foriris lin, kiam li ankoraǚ estismeze de sia laboro, plena de planoj kaj tiel ju-ha. Kun muta senpovo ni devas subii al lasenkompata trudo de la sorto, kvankam la men-so ribelas kaj rifuzas kredi ke ipovas esti vero.

  15. Ongelijkheid als beleidsvraagstuk

    NARCIS (Netherlands)

    Wilterdink, N.

    2014-01-01

    Op het hoogtepunt van de hype rond het ongelijkheidsonder­zoek van Piketty presenteerde de WRR zijn verkenningHoe ongelijk is Nederland? Voor de onafhankelijke denktank is stelling nemen in een politiek vraagstuk als dat van ongelijkheid best ingewikkeld.

  16. Comentarios al Salto Social

    Directory of Open Access Journals (Sweden)

    Facultad de Ciencias Económicas

    1995-06-01

    Full Text Available 1. El Plan considera que la política social es un componente central de la estrategia macroeconómica. A diferencia de la administración Gaviria, lo social ha dejado de ser un asunto marginal, es consustancial al desarrollo y, por tanto, se le confiere una dimensión cualitativamente diferente.

  17. Kulturmorphologie als Zivilisationskritik

    DEFF Research Database (Denmark)

    Peters, Rikke Alberg

    2010-01-01

    Der Untergang des Abendlandes wird oft als dasjenige Werk betrachtet, das am tiefsten die national gefärbte Gegenüberstellung von Kultur und Zivilisation in der Zwischenkriegszeit geprägt und propagiert hat. Wie auch bei anderen Autoren der Konservativen Revolution, vor allem bei Thomas Mann und...

  18. Abraham Kuyper als theoloog

    Directory of Open Access Journals (Sweden)

    W. H. Velema

    1989-06-01

    Full Text Available Men zou in Nederland de herdenking van Kuypers honderdvijftigste geboortedag hebben kunnen aangrijpen als een gelegenheid om diens theologie en diens levenswerk in kerk en samenleving te evalueren. Niemand kan ontkennen dat er in genoemde publicaties iets van een evaluatie is te vinden.

  19. ahadzie et al

    African Journals Online (AJOL)

    PUBLICATIONS1

    3Department of Computer Science, KNUST, Kumasi ... competencies relating to achieving the standard ... Brill et al., (2006) using a web- ... practical application of the core competencies .... culties and delays, poor coordination and com- ..... for subjective judgment and hence creating .... Ghana (Technical Document). Accra ...

  20. Aderoju et al (18)

    African Journals Online (AJOL)

    USER

    The digital aeromagnetic data were processed to produce total magnetic intensity and .... filters to TMI-RTE data as outlined by Stone et al. (2004). ... 2D-forward modeling of some ... primarily an image-based recognition of patterns, trends ...

  1. ALS (Amyotrophic Lateral Sclerosis)

    Science.gov (United States)

    ... the processes leading to cell death. Using both animal models and cell culture systems, scientists are trying to determine how and why ALS-causing gene mutations lead to the destruction of neurons. These animal models include fruit flies, zebrafish, and rodents. Initially, ...

  2. Proton irradiation studies on Al and Al5083 alloy

    Science.gov (United States)

    Bhattacharyya, P.; Gayathri, N.; Bhattacharya, M.; Gupta, A. Dutta; Sarkar, Apu; Dhar, S.; Mitra, M. K.; Mukherjee, P.

    2017-10-01

    The change in the microstructural parameters and microhardness values in 6.5 MeV proton irradiated pure Al and Al5083 alloy samples have been evaluated using different model based techniques of X-ray diffraction Line Profile Analysis (XRD) and microindendation techniques. The detailed line profile analysis of the XRD data showed that the domain size increases and saturates with irradiation dose both in the case of Al and Al5083 alloy. The corresponding microstrain values did not show any change with irradiation dose in the case of the pure Al but showed an increase at higher irradiation doses in the case of Al5083 alloy. The microindendation results showed that unirradiated Al5083 alloy has higher hardness value compared to that of unirradiated pure Al. The hardness increased marginally with irradiation dose in the case of Al5083, whereas for pure Al, there was no significant change with dose.

  3. OF THE COMMON GOOD TO THE COMMON GOOD OF HUMANITY. DE LOS BIENES COMUNES AL BIEN COMÚN DE LA HUMANIDAD.

    Directory of Open Access Journals (Sweden)

    François Houtart.

    2014-06-01

    Full Text Available There is no place in the world, where a deep discomfort manifests against the increase of the social gaps, to the disrespect for justice, to the unemployment of young people, the abuse of power, and the destruction of nature. A new wave of social movements has been developed. The social forums allowed its globalization. A collective social conscience grows: we cannot continue like this. The kind of economic development that we go thorough today, with its political, psychological, and cultural consequences is the source of the imbalances. At the same time, the need for solutions is essential urgently. It is time to consider new directions and not only adaptations. Gathering forces to act and to think for this purpose, is a priority. This is why, along with the initiative of the Referendum on the water (one of the Common Good in Italy, the Rosa Luxembourg Foundation made the decision to organize a Conference on the concept of the Common Good of Humanity, to promote a reflection on the links between the two concepts and to integrate the demands and social struggles for a change of society, scenario in which this article is framed. RESUMEN: No hay lugar en el mundo, donde un profundo malestar se manifiesta frente al aumento de las brechas sociales, al irrespeto a la justicia, al desempleo de los jóvenes, a los abusos de poder, a la destrucción de la naturaleza. Una nueva ola de movimientos sociales se ha desarrollado. Los Foros sociales permitieron su globalización. Una conciencia social colectiva crece: no se puede seguir así. El tipo de desarrollo económico que vivimos actualmente, con sus consecuencias políticas, culturales y sicológicas, es el origen de los desequilibrios. Al mismo tiempo, la necesidad de soluciones se impone de manera urgente. Es el momento de plantear nuevas orientaciones y no solamente adaptaciones. Reunir fuerzas para actuar y pensar por este fin, es una prioridad. Es por esto que, junto a la iniciativa del Refer

  4. Calculation of interaction of AlCl, AlCl2 and AlCl3 on Al4C3 (001) Al4CO4 (001) and Al2CO (001) planes

    Institute of Scientific and Technical Information of China (English)

    段少飞; 陈秀敏; 杨斌; 郁青春; 徐宝强; 刘大春

    2015-01-01

    To make sure the intermediate products of the carbothermic reduction of Al2O3 process, such as Al4CO4, Al2CO and Al4C3, and the interaction of AlCl, AlCl2, AlCl3 with Al4CO4, Al2CO and Al4C3, respectively, thermodynamic analyses were used to study the chloride reaction production of them under the vacuum situation. The stable structures and electronic properties of AlCl, AlCl2 and AlCl3 adsorbed on Al4CO4, Al2CO and Al4C3 were calculated by first-principles calculations by the CASTEP module in the Materials Studio program. The results show that the AlCl3 and AlCl2 molecules have decomposed on the plane of Al4C3 (001), while there are no obvious decomposition of AlCl3 and AlCl2 on Al4CO4 (001) and Al2CO (001) planes. The adsorption of AlCl on the Al4CO4 (001) and Al2CO (001) planes is stronger than that on the Al4C3(001) plane. The interaction strength of AlCl3, as well as AlCl2, with Al4CO4, Al2CO and Al4C3 is in the sequence of Al4CO4Al2CO>Al4C3.

  5. Derecho al desarrollo y globalidad

    OpenAIRE

    Álvarez Vita, Juan

    2014-01-01

    La presente disertación, que he intitulado Derecho al Desarrollo y Globalidad, consta de cuatropuntos principales:I. El derecho al desarrollo en el contexto de los derechos humanosII. La noción del derecho al desarrolloIII. El derecho al desarrollo en el marco de las llamadas generaciones de derechos humanosIV. El derecho al desarrollo y la aldea globalPalabras clave: derechos humanos, Derecho Natural, Derecho Positivo, sociedad global.

  6. Factores asociados al bajo peso al nacer

    Directory of Open Access Journals (Sweden)

    Georgina J Peraza Roque

    2001-10-01

    Full Text Available El bajo peso al nacer (BPN ha constituido un enigma en la ciencia a través de los tiempos. Múltiples son las investigaciones realizadas acerca de las causas que lo producen y las consecuencias que provoca. Su importancia no solo radica en lo que significa en la morbilidad y la mortalidad infantil, sino que estos niños tienen habitualmente múltiples problemas posteriores. El Programa para la Reducción del BPN señala que los niños nacidos con un peso inferior a los 2 500 g presentan riesgo de mortalidad 14 veces mayor durante el primer año de vida, en comparación con los niños que nacen con un peso normal a término. Dentro de los factores de riesgo del BPN se han encontrado con mayor frecuencia en estudios realizados por diferentes autores, los siguientes: el embarazo en la adolescencia, la desnutrición en la madre, el hábito de fumar, la hipertensión arterial durante el embarazo, la sepsis cervicovaginal, la anemia y los embarazos gemelares, entre otros. Es innegable la influencia que el BPN tiene sobre las futuras generaciones, por lo que debe constituir la diana de los esfuerzos que el médico y la enfermera deben desarrollar en su prevención, sobre todo en la comunidadLow birth weight has been an enigma for Science through times. A lot of research works have been carried out about its causes and consequences. The importance of LBW not only lies in its meaning for infant mortality and morbidity but also in the many problems that low birth weight children regularly face in the future. The program for the reduction of LBW points out that newborns weighing under 2500g have during his/her first year of life a mortality risk 14 times higher than newborns with a normal weight at term. Among the low birth weight risk factors, a number of studies by various authors have frequently found the following; pregnancy at adolescence; undernourishment in mothers, smoking, blood hypertension during pregnancy, cervix-vaginal sepsis; anemia, twin

  7. De GPS al mapa

    Directory of Open Access Journals (Sweden)

    Esteban Dörries

    2016-03-01

    Full Text Available Las coordenadas Lambert obtenidas a partir de mediciones con equipos GPS de mano, llamados a veces navegadores, en ciertos casos confunden al usuario, por diferir claramente de su posición real al ser graficadas en un mapa del Instituto Geográfico Nacional (IGN: Esto puede resolverse con suficiente exactitud mediante una transformación de Molodensky, seguida de la correspondiente proyección cartográfica. Sin embargo, los tres parámetros necesarios para la transformación, supuestamente válidos para Costa Rica, se encuentran en muchas variantes y producen obviamente resultados diferentes. En este trabajo se analizan los fundamentos del problema y sus posibles soluciones, culminando con un estudio comparativo de ocho casos, que permite seleccionar los valores más adecuados para los parámetros.

  8. Del crimen al amor

    Directory of Open Access Journals (Sweden)

    Óscar Osorio

    2015-01-01

    Full Text Available Este ensayo ofrece un análisis de la adaptación al cine de la novela La Virgen de los sicarios de Fernando Vallejo que hace Barbet Schroeder en el año 2000. Se demuestra cómo, a través de un sutil proceso de supresión, atenuación y/o realce de elementos fundamentales a la novela, esta adaptación resulta en un filme en el que se advierte un proyecto ético-estético diferente al del texto original y en algunos aspectos opuesto a este. Ello a pesar de que los contenidos diegéticos son bastante similares. Gracias a este proceso, el filme resulta menos abrumador que la novela.

  9. Religion als soziale Deutungspraxis

    Directory of Open Access Journals (Sweden)

    Ulrike Lingen-Ali

    2016-12-01

    Full Text Available ENGLISH: During the last decades, the topos religion transformed into a powerful category of difference, which is also relevant for educationsystems and settings. Religion as a tool to differentiate between subjects is linked with power and dominance and, thus,with ideas about the constructed identities of “the other”. With this respects, religion functions as a code to define in- andexclusions and mark “the other”, e.g. “the Muslim” in predominantly Christian societies in Europe. Critical theories on racismenable to recognize, describe and define these practices and their effects. They can provide a useful tool to question and challengeintercultural and interreligious educational approaches which potentially reproduce and, thus, strengthen cultural/religiousdifferentiations. DEUTSCH: Die Differenz- und Heterogenitätskategorie Religion hat sich in den letzten Jahren im europäischen und auch deutschsprachigenDiskursraum zu einer medial, wissenschaftlich und politisch wirkmächtigen Kategorie entwickelt. Dabei zeigt sich Religion sowohlals soziale Unterscheidungspraxis (auch in pädagogischen Arrangements, als auch als Mittel zur Identifikation und Charakterisierungbestimmter Gruppen und Individuen als religiöse Subjekte. Religion stellt in diesem Zusammenhang einen Zugehörigkeitscodedar, mit dem Personen als natio-ethno-kulturell Andere markiert werden, wie die Markierung von MuslimInnen durchAngehörige der mehrheitlich christlichen Dominanzgesellschaft zeigt. Rassismuskritische Ansätze ermöglichen es zumeist eherimplizit an Rassekonstruktionen anschließende Unterscheidungen zu erkennen und zu beschreiben, den Bedingungen ihres Wirksamwerdensnachzugehen sowie ihre Konsequenzen zu bestimmen. Eine rassismuskritische und migrationspädagogisch informierteReligionspädagogik ermöglicht AkteurInnen, weniger auf gewaltvolle Unterscheidungspraxen angewiesen zu sein undalternative Veränderungs- und Handlungsmöglichkeiten zu

  10. Carta al editor

    Directory of Open Access Journals (Sweden)

    Harry Pachajoa

    2012-02-01

    Full Text Available Recently, Valencia et al., published a very interesting article called «Lipid profile in a group of patients with Turner’s syndrome at Clínica Universitaria Bolivariana in the city of Medellín between 2000 and 2009". An article which evaluated lipid levels in patients withTurner syndrome in a Colombian clinic, the study associated results of lipid profile with karyotype and other risk factors for coronary heart disease.

  11. Augmented Reality als Bildungsenhancement?

    OpenAIRE

    Damberger, Thomas

    2015-01-01

    Die Realität, die sich mithilfe von Datenbrillen und Smartphone Applikationen in die virtuelle Welt hinein ausdehnt, erfährt eine Form des Enhancements. Ein solches Enhancement kann unter bestimmten Voraussetzungen als Bildungsenhancement verstanden werden. Der Text befasst sich mit Formen der erweiterten Realität, ferner mit dem, um was es wesentlich bei der Bildung geht und zuletzt mit den Bedingungen, die erforderlich sind, um diesem Wesentlichen mit Hilfe von augmented reality besser zum ...

  12. Contribución al estudio de la biología y capacidad de control de Encarsia Formosa Gahan en la Sabana de Bogotá Biology ano control activity ,of Encarsia formosa Gahan in Bogota (Colombia

    Directory of Open Access Journals (Sweden)

    Español Jeannette Amparo

    1988-12-01

    Full Text Available Con la introducción de Encarsia formosa Ganan.(Hvrnenóptero-Aphelinidae, parásito espec ífico de la mosca blanca Trisleurodes vaporariorum (Westwood Ouaintance
    & Baker, se realizó un estudio de biología, comportamiento y adaptación del parásito en condiciones de laboratorio e invernadero a nivel de la Sabana de Bogotá, A partir de las primeras liberaciones de Encsrsie, se observó una buena capacidad de búsqueda, dispersión, adaptación y eficiencia
    de control sobre la mayoría de hospederos vegetales muestreados, En condiciones de la boratorio sobre plantas de tomate, se obtuvo una fecundidad promedia de 63 huevos/
    hembra/20 días, una longevidad promedia de 41,4 días, una relación de sexos de 361: 1 Hembras/macho, una duración del ciclo de vida de 22,1 días cuando parasitó ninfas en tercer instar y de 12,7 días cuando parasitó ninfas de mosca blanca en cuarto instar, En la evaluación del control ejercido sobre las ninfas de mosca blanca en plantas de tomate se determinó un mayor porcentaje de parasitismo en los folíolos medios y apicales y un mayor porcentaje de predación en los folíolos basales, En cuanto al control ejercido por Encarsia formosa sobre plantas de tomate y tabaco en laboratorio y tomate,  milflores y alstroemeria bajo condiciones de
    invernadero y sometidas a libre infestación de la plaga y el parásito se determinó un buen control expresado en un alto porcentaje de parasitismo superior al 70% y un bajo
    porcentaje de predación.
    Some preliminary studies on behavior and adaptation of the newly introduced Encarsia formosa Gahan as a parasite of the greenhouse whitefly Trisleurodes vaporariorum (Westwood under laboratory and greenhouse conditions were determined. Different plant hosts of T. vaporariorum were considered. Using tomato as a host for the greenhouse whitefly it was found that E. formosa showed and average
    fecundity of 63 eggs per female in 20 days, an adult

  13. Diagnósticos al alta hospitalaria de las personas inmigrantes en la ciudad de Valencia (2001-2002

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    Antonio Salazar

    2003-01-01

    Full Text Available Fundamento:La inmigración en España se ha incrementado de forma notable en la última década. Por razones teóricas se ha planteado que esta población pudiera ser responsable de un aumento de la incidencia y/o transmisión de enfermedades infecciosas. Sin embargo, existen escasos estudios acerca de las enfermedades de este colectivo que permitan conocer la importancia de esta afirmación. El objetivo de este estudio es cuantificar la atención hospitalaria a esta población en la ciudad de Valencia. Métodos: Se obtuvieron los registros de altas de los Servicios de Admisión de los hospitales públicos de la ciudad de Valencia. Se desarrolló un estudio observacional retrospectivo para el año comprendido entre el 1 de octubre de 2001 al 30 de septiembre del 2002. Resultados: Recuperamos 8.444 ingresos que identificaron 1.577 ingresos de inmigrantes. Se evidenció una proporción similar de inmigrantes registrados con documentación reglada (841, 51,16% e inmigrantes supuestamente no regularizados (803, 48,84%. Predominaron las mujeres (68,3% frente a los varones (31,7% y una media de edad inferior a los 30 años. El diagnóstico de alta más frecuente fue «complicaciones del embarazo, parto y puerperio» con 37,7% del total. Los «traumatismos y envenenamientos », «enfermedades del aparato digestivo» y «enfermedades del aparato respiratorio» representaron el 12,9%, el 7,8% y el 5,4%, respectivamente. Las «enfermedades infecciosas y parasitarias» supusieron el 4,4%. Conclusiones: La proporción de enfermedades infecciosas e infectocontagiosas observadas no contribuyen a alentar las opiniones difundidas sobre importación o reemergencia de enfermedades desde los colectivos de inmigrantes. La inmigración masiva acaecida requiere múltiples adaptaciones del Sistema de Salud que permitan establecer el perfil de salud de este colectivo, basado en estimaciones poblacionales.

  14. Diagnósticos al alta hospitalaria de las personas inmigrantes en la ciudad de Valencia (2001-2002

    Directory of Open Access Journals (Sweden)

    Salazar Antonio

    2003-01-01

    Full Text Available Fundamento: La inmigración en España se ha incrementado de forma notable en la última década. Por razones teóricas se ha planteado que esta población pudiera ser responsable de un aumento de la incidencia y/o transmisión de enfermedades infecciosas. Sin embargo, existen escasos estudios acerca de las enfermedades de este colectivo que permitan conocer la importancia de esta afirmación. El objetivo de este estudio es cuantificar la atención hospitalaria a esta población en la ciudad de Valencia. Métodos: Se obtuvieron los registros de altas de los Servicios de Admisión de los hospitales públicos de la ciudad de Valencia. Se desarrolló un estudio observacional retrospectivo para el año comprendido entre el 1 de octubre de 2001 al 30 de septiembre del 2002. Resultados: Recuperamos 8.444 ingresos que identificaron 1.577 ingresos de inmigrantes. Se evidenció una proporción similar de inmigrantes registrados con documentación reglada (841, 51,16% e inmigrantes supuestamente no regularizados (803, 48,84%. Predominaron las mujeres (68,3% frente a los varones (31,7% y una media de edad inferior a los 30 años. El diagnóstico de alta más frecuente fue «complicaciones del embarazo, parto y puerperio» con 37,7% del total. Los «traumatismos y envenenamientos», «enfermedades del aparato digestivo» y «enfermedades del aparato respiratorio» representaron el 12,9%, el 7,8% y el 5,4%, respectivamente. Las «enfermedades infecciosas y parasitarias» supusieron el 4,4%. Conclusiones: La proporción de enfermedades infecciosas e infecto-contagiosas observadas no contribuyen a alentar las opiniones difundidas sobre importación o reemergencia de enfermedades desde los colectivos de inmigrantes. La inmigración masiva acaecida requiere múltiples adaptaciones del Sistema de Salud que permitan establecer el perfil de salud de este colectivo, basado en estimaciones poblacionales.

  15. Rheocasting Al matrix composites

    Energy Technology Data Exchange (ETDEWEB)

    Girot, F.A.; Albingre, L.; Quenisset, J.M.; Naslain, R.

    1987-11-01

    A development status account is given for the rheocasting method of Al-alloy matrix/SiC-whisker composites, which involves the incorporation and homogeneous distribution of 8-15 vol pct of whiskers through the stirring of the semisolid matrix melt while retaining sufficient fluidity for casting. Both 1-, 3-, and 6-mm fibers of Nicalon SiC and and SiC whisker reinforcements have been experimentally investigated, with attention to the characterization of the resulting microstructures and the effects of fiber-matrix interactions. A thin silica layer is found at the whisker surface. 7 references.

  16. Teatro al aire libre

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    Philippe Canac

    2016-11-01

    Full Text Available Siendo cada vez más frecuentes y numerosas las peregrinaciones a la basílica de Notre Dame, de Laus (Altos Alpes, su capacidad resultaba hace tiempo insuficiente para acoger a sus peregrinos. Este fue el motivo de crear, en un terreno situado ante el atrio de la basílica, un conjunto, que permitiese celebrar misas al aire libre, ceremonias litúrgicas o representaciones de teatro religioso y que dispusiese de todas las posibilidades para conseguir la libertad del juego escénico.

  17. El culto al pixel

    OpenAIRE

    Pérez-Gómez, Miguel Ángel

    2010-01-01

    Podemos considerar el retrogaming como el culto a las plataformas antiguas y sus respectivos videojuegos, tanto de ordenador como de las consolas de 8-bits. Este artículo trata de hacer una aproximación de carácter etnográfico sobre el fenómeno del retrogaming. Podemos considerar a este colectivo como un “fandom” al uso, que posee actividades de carácter colectivo, publicaciones digitales y en papel, y convenciones en las que se venden los juegos, las consolas y hardware. Retrogaming can b...

  18. Frequently Asked Questions about ALS and the ALS Registry

    Science.gov (United States)

    ... Muscular Dystrophy Association (www.mda.org) The Les Turner ALS Foundation (www.lesturnerals.org) Back to Top ... als. Back to Top Why was incidence (new cases of ALS) not provided in the report? Date of diagnosis is needed to calculate incidence. ...

  19. Derivados vinculados al seguro.

    Directory of Open Access Journals (Sweden)

    De Paz Cobo, Sonia

    2003-01-01

    Full Text Available El presente trabajo tiene como objetivo la presentación de los derivados financieros como instrumentos de cobertura de los riesgos del seguro, así como de los principales proyectos que se desarrollan a través de los mismos, como por ejemplo los derivados sobre el clima. Hay que tener presente las pérdidas multimillonarias ocasionadas en casos como el de la banca Baring’s, o el de Orange County, por citar algunas, que si bien ciertos autores afirman que están en relación directa con el uso de estos productos, no podemos olvidar que los instrumentos derivados se desarrollaron con el objetivo principal de proteger al usuario de la posible volatilidad del activo subyacente. Ya en la industria aseguradora los derivados vinculados a tal actividad son instrumentos donde el pago se condiciona a la ocurrencia de su suceso de siniestro, o serie de sucesos múltiples que disparen las pérdidas. Tras el repaso efectuado y la descripción que este tipo de instrumentos puede tener en la gestión del riesgo por parte de la industria aseguradora, concluiremos con la exposición de las relaciones con el reaseguro tradicional así como una breve referencia al futuro de este tipo de instrumentos

  20. Gliricidia sepium al establecimiento

    Directory of Open Access Journals (Sweden)

    J. L. Valle

    2004-01-01

    Full Text Available Se asoció Cenchrus ciliaris (Cc y Gliricidia sepium (Gs para evaluar la producción de biomasa y la composición química de los forrajes en la fase de establecimiento, en el estado de Morelos, México, en condiciones de trópico seco. Se empleó un análisis de varianza con diseño en bloques al azar, en donde T1 fue pasto solo, T2 Cc más Gs con 5,000 plantas ha-1 y el T3 Cs más Gs con 14,285 plantas ha-1. Se midió la producción de forraje individual y asociado con materia seca (t MS/Ha, la altura (A en cm, la proteína cruda (PC%, las fracciones de fibra (FDN% y FDA% y la digestibilidad in vitro de la materia seca (DIVMS%. El T3 tuvo una mejor producción de biomasa (P0.05. La asociación de 14,285 plantas ha-1 de G. sepium con pasto Cenchrus ciliaris mejoró la producción de biomasa y la disponibilidad total de nutrientes por superficie cultivada al establecimiento

  1. Modeling neuronal vulnerability in ALS.

    Science.gov (United States)

    Roselli, Francesco; Caroni, Pico

    2014-08-20

    Using computational models of motor neuron ion fluxes, firing properties, and energy requirements, Le Masson et al. (2014) reveal how local imbalances in energy homeostasis may self-amplify and contribute to neurodegeneration in ALS.

  2. AL-USRCRN Station Information

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Documentation of United States Alabama Regional Climate Reference Network (AL-USRCRN) installations in 2006. Installations documented are for AL-USRCRN pilot project...

  3. AL-SIYAQ FI TARJAMAH KITAB AL-LUGHAH AL-'ARABIYAH ILA AL-LUGHAH AL-INDUNISIYAH

    Directory of Open Access Journals (Sweden)

    Devita Zuliati

    2016-06-01

    Full Text Available This study aimed at analyzing the translation of 53 poems in Tata Bahasa Arab book written by Chatibul Umam, et al. in view of the context theory. This study was based on a contextual translation theory that the understanding the right and proper context of Arabic texts translated into Indonesian plays an important role in determining the quality of a translation that is easily understood, contextual and functional. The qualitative data were read using the linguistic approach and critical translation. This study concluded that the translation work of Chatibul Umam, et al. tended to be literal not based on the complete understanding of the context, internal context (linguistic context and socio-cultural context of the texts. The role of the external context of the texts is less utilized in the translation process of poetry (nazham, so that the translation of the book is neither communicative nor functional.

  4. COMENTARIO AL CASO PINOCHET

    Directory of Open Access Journals (Sweden)

    Alberto Contreras Clunes

    2002-01-01

    Full Text Available El fallo en el caso Pinochet tiene distintas formas de ser analizado. De partida, desde un punto de vista político, también constitucional, del derecho penal. Sin embargo, nos abocaremos al estudio desde el punto de vista procesal, en especial a lo referido al Debido Proceso. Para ello se analizará los presupuestos, la solución dada por la Excma. Corte Suprema y las consecuencias del mismo. Además, se criticará la solución dada, desde la óptica de las garantías procesales del imputado, contenidas en el nuevo proceso penal y lo dispuesto en la Constitución y la Convención Americana de Derechos Humanos. Finalmente, se argumentará en favor de una interpretación finalista y armónica de la Constitución y los tratados internacionales de derechos humanos.The verdict of the Pinochet Case has different ways of being analyzed: from the political, the constitutional, and the penal law points of view. However, we will approach this study from the legal point of view, especially to that referred to as the Proper Process. To do this, the budgets, the solution given by the Most Excellent Supreme Court, and its consequences will be analyzed. Furthermore, the given solution will be criticized from the point of view of the legal guarantees of the accused contained in the new penal process and what is contained in the Constitution and in the American Convention of Human Rights. In conclusion, we will argue in favor of a final and harmonious interpretation of the Constitution and the international agreement of human rights.

  5. Carta al Editor

    Directory of Open Access Journals (Sweden)

    Darío Maldonado Romero

    1991-03-01

    Full Text Available

    Bogotá, 01 de Agosto de 1990
    Señores
    Miembros del Consejo Editorial
    Academia Nacional de Medicina
    E.S.D.

    Señores doctores:

    Con toda consideración y respeto me permito agregar algunas anotaciones al escrito del Académico Alberto Cárdenas Escobar, aparecido en el No. 22 de Medicina, para destacar algunos aspectos de la personalidad del doctor Alberto Schweitzer galardonado con el Premio Nobel de la Paz.

    A los 30 años de edad tomó una decisión dramática: Estudiar Medicina para trabajaren el África Ecuatorial. Cuando terminó sus investigaciones sobre enfermedades tropicales y sus prácticas hospitaLarias, partió para el Gabon al pequeño pueblo de Lambarené. La tarea era desconsoladora; La atención médica había que prestarla al aire libre; iba con su esposa, como enfermera y amanuense, y no se encontraba ni un intérprete, ni un ayudante. Cuando le llegaron la medicina y el equipaje hubo que acomodarlos en un viejo gallinero abandonado; el calor era insoportable y le venían enfermos de varias millas a la redonda, a pie o en Canoas.

    Las enfermedades más difundidas eran Malaria, Disentería, estreptococias y la más mortífera, la Tripanosomiasis Gambiense, para la que empezaban a llegar medicinas nuevas eficaces y las medidas preventivas como el suministro de agua potable y enmallado de ventanas impedían muchas contaminaciones.

    Pero la que causaba mayores dificultades y trabajo era la Mycobacteriasis Anestesiante, incurable, de difícil diagnóstico, afectando a varios miembros de la misma familia, de aspecto horripilante, con complicaciones neuríticas muy dolorosas, frecuente ceguera, e invalideces y procesos erisepelatososacrotéricos, que exigían acompañante para el cambio y lavado de vendas y suministro de alimentos.

    A menos de un año de

  6. Konsep Hati Menurut al-Hakim al-Tirmidzi

    Directory of Open Access Journals (Sweden)

    Ryandi Ryandi

    2014-03-01

    Full Text Available Dalam khazanah sufi, hati atau qalb adalah salah satu term sentral yang dibahas secara mendalam. Karena bagi sufi, hati adalah entitas metafisik (latifah rabbaniyyah ruhaniyyah yang dengannya manusia dapat mencapai ma’arifatullah dan mengetahui rahasia-rahasia-Nya. Salah satu sufi klasik yang mengkaji hati secara mendalam adalah Abu ‘Abdullah ibn ‘Ali ibn al-Hasan ibn Basyar al-Hakim al-Tirmidzi (w 320 H. Ia mengkonsepsikan hati sebagai entitas metafisik universal yang terkandung di dalamnya tingkatan-tingkatan batin (maqamat al-qalb, yaitu: sadr, qalb, fu’ad, dan lubb. Pemetaan ini dimunculkan sesuai dengan fungsi linguistiknya dan penggunaannya dalam al-Qur’an dan Hadis Nabi SAW. Tiap-tiap tingkatan batin tersebut berkaitan dengan tingkatan pengetahuan, keilmuan, spiritual, dan jiwa manusia. Kaitan tersebut menunjukan bahwa qalb merupakan eksistensi ruhani manusia (al-kainunah al-ruhiyyah, yang berfungsi sebagai instrumen penyempurna bagi manusia (al-jihaz al-mutakamil li al-insan yang meliputi seluruh kekuatan dan potensi manusia: ruhani, ‘aqliyah, dan kehendak, di mana manusia dengannya dapat merasa, berpikir, mengetahui, bahkan dapat mencapai ma’rifatullah dan dekat dengan-Nya.

  7. Editorial: Cartas al Editor

    Directory of Open Access Journals (Sweden)

    Guillermo Llanos

    2006-06-01

    Full Text Available En todas las revistas biomédicas del mundo existe una sección habitual denominada como el título de este editorial y que en Colombia Médica la llamamos correspondencia. Este espacio tiene como objetivo fundamental que los lectores escriban a los autores (investigadores comentando los artículos que se han publicado en números anteriores de la revista. Las cartas son, entonces, breves comentarios de desacuerdo o acuerdo (conceptual, metodológico, interpretativo sobre falencias ubicadas por un lector alerta al tema debatido en cualquiera de las secciones como en los artículos originales, editoriales, revisiones, presentación de casos, etc. publicados previamente en la revista. Las cartas deben permitir el intercambio de opiniones y formas de pensar y analizar los problemas planteados entre los autores y los lectores. En ocasiones una serie de cartas motivadas por un artículo original puede ser tan o más interesante como el artículo que generó la correspondencia. Las cartas son también un formato adecuado para comunicar un hecho novedoso de una observación clínica juiciosa no descrita antes. Un ejemplo de ello es la carta de un gineco-obstetra australiano cuando informó a Lancet los primeros efectos adversos informados de la talidomida. Colombia Médica, a pesar de mantener vigente esta sección, no ha sido muy afortunada en establecer una buena cultura del envío de cartas al editor. Pero últimamente han llegado juiciosas observaciones a las cuales se les ha dado prioridad en su publicación. Toda carta que comenta los hallazgos de un artículo es enviada a los autores para su respuesta, porque ello genera el debate académico buscado, y luego se publican, tanto la carta como su respuesta. El Estilo Vancouver recomienda que la carta y su respuesta deban ser breve, no pasar de dos o tres párrafos y contener sólo cuatro o cinco referencias. En lo posible (a menos que sea indispensable no presentar ni cuadros ni gráficos. El t

  8. Idaaratu al Wahdah al Namthiyah li at Tathwiri al Tarbiyah al Islamiyah

    Directory of Open Access Journals (Sweden)

    Ahmad Danusiri

    2016-04-01

    Full Text Available Islam, through the Quran, proclaims that its mission includes the teachings to the whole universe, Everything in the universe is maintained by Islam, and none of the symptoms are ignored. The revelations also include the traditions of the Prophet that are authentic (shahih and good (hasan in quality. Both the Quran and maqbulah hadiths are accepted by Muslims on the basis of faith. When some experts of UIN Walisongo from various disciplines try to understand the sacred words of these two resources, their understanding continues, reaching the paradigm of the unity of science which essentially unites the normative, social, and natural sciences. The effect of this paradigm has brought up an issue for the author. Is there any hadiths or Prophetic traditions that can be used as a grand theory in the management disciplines of Islamic education.To address this issue, the authors conducted a literature research with the title Development of Islamic Education Management Module. Sources of data were focused on nine books of Hadiths : Sahih al-Bukhari, Sahih al-Muslim, Sunan Abu Dawud, Sunan at-Turmudzi, Sunan an-Nasai, Sunan Ibn Majah, Sunan ad-Darimi, Muwatta Malik, and Musnad Imam Ahmad bin Hanbal in the form of digital data Lidwa Reader Software Book 9 Imam Hadith. The findings of the study stated that the meaning of the word Rabb includes: creating, nurturing, maintaining, teaching, educating, and organizing. Thus, in an academic term, the word Rabb implies a manager or leader. Meanwhile, in the concept of comprehensive manager it contains at least 14 nomenclature denotations: planning, responsibility, organization, coordination, system of employee payroll, learning, resources, humanity, principle of making it easier for the manager to the employee, motivated to achieve optimal performance, preventing unproductivity, education participation, institutional costs, monitoring, and evaluation system. Each nomenclature has numerous hadiths that could serve

  9. Malamih al-Ashwat al-'Arabiyyah wa Makharijaha

    Directory of Open Access Journals (Sweden)

    Amrah Muhammad Kasim

    2015-12-01

    Full Text Available This writing discusses on al-ashwat al-‘arabiyyah that is known with “phonetic” term. It talks and interprets makharij al-huruf or place for producing sounds and also processing production of sounds by parts of mouth in Arabic language. The problems of sounds and its systems in Arabic language have been conducted by the scholars of al-ashwat al-‘arabiyyah attractively, neatly, and detail and gotten ahead the phonetic western scholars. Part of their analysis results formulate the study about al-ashwat al-sakinah (al-Shamit is known with vocal and consonant sounds in research questions shawait – shawamit. Ibnu Jinni has formulated “harakat”(wowel in Arabic language and dimension of letter  mad and liyn on alif  letter - waw - ya’ (ا و ي, from these letters create  harakat fathah, dammah, and kasrah. Moreover, in this writing also exist the description of hija’i letters and its makhraj that are correct from parts of mouth and the unity of coordinative sounds that produce sounds in morphemes arrangement, in one word that produces meaning. The result of phonological study has divided al-ashwat to be kinds of sound like the pronounced sounds, produced sounds from mouth, and heard sound.

  10. Kirchengeschichte als Ketzergeschichte

    Directory of Open Access Journals (Sweden)

    Susanne Lanwerd

    2006-07-01

    Full Text Available Die katholische Theologin Daniela Müller spricht am Ende ihres Buches von der „Notwendigkeit der Ketzerei“ und begründet diesen Gedanken wie folgt: „‚Ketzer‘ und ‚Ketzerinnen‘ sind die dunklen Geschwister, ohne die man nicht so wäre wie man ist, die man deshalb so bekämpft, weil sie solch starke Gefühle mit uns teilen, weil sie die gleichen Eltern, den gleichen Ursprung haben wie wir und das gleiche Ziel: zur Familie Gottes zu gehören"; die Kirche als „Hüterin der Glaubenswahrheit“ solle daher die „Ketzergeschichte […] in den immerwährenden Prozess der Wahrheitsfindung“ einbeziehen (S. 233 f.. In diesen Prozess will auch die Autorin mit ihrer Studie eingreifen, und zwar am Beispiel der Katharerinnen, deren Geschichte sie für den Zeitraum von 1143 bis 1275 rekonstruiert; sie verfolgt das fragwürdige Ziel, die Geschichte der Katharerinnen im Modus einer emotionalen und identifikatorischen „Aneignung“ dem „eigenen Leben, der eigenen Sinngebung, der eigenen Verarbeitung“ integrieren zu wollen (S. 15.

  11. Porosity of porous Al alloys

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Two porosity models of porous Al alloys with different pore types (ball and polygon shape) were established. The experimental results coincide well with theoretical computations. The porosity of Al alloys (Prc) consists of three parts, porosity caused by preform particles (Prp), additional porosity (Pra), and porosity caused by solidification shrinkage (Prs). Prp is the main part of Prc while Pra is the key for fabricating porous Al alloys successfully in spite of its little contribution to Prc.

  12. The Evolution of Al Qaeda

    Science.gov (United States)

    2007-06-15

    www.carleton.ca/cciss/res_docs/itac/gendron_e.pdf; Internet. 26Muhammad Abd al-salam Faraj, Al-Farīdah al-Ghā’ibah, trans. Johannes J.G. Jansen and... Theo Van Gogh.91 Hoffman also supports the idea proposed by other experts like Benjamin Orbach and Keith Blanchard of the Congressional Research...religious intolerance over cartoons in Danish newspapers, the assassination of Theo Van Goeh, and increasing discontent among disassociated Muslim

  13. Al versus Si competition in FeSiAl alloys

    Energy Technology Data Exchange (ETDEWEB)

    Legarra, E. [Dpto. Electricidad y Electronica, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV/EHU), CP 644, 48080 Bilbao (Spain)], E-mail: estibaliz.legarra@ehu.es; Apinaniz, E. [Dpto. Fisica Aplicada I, Escuela de Ingenieria Tecnica Superior, Universidad del Pais Vasco, Alameda de Urquijo s/n 48013 Bilbao (Spain); Plazaola, F. [Dpto. Electricidad y Electronica, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV/EHU), CP 644, 48080 Bilbao (Spain); Jimenez, J.A. [Centro Nacional de Investigaciones Metalurgicas (CENIM), Avda. Gregorio del amo 8, 28040 Madrid (Spain); Pierna, A.R. [Chemical Engineering and Environmental Department, UPV/EHU, Box 1379, 20008 San Sebastian (Spain)

    2008-10-15

    In FeSiAl alloys, when Si substitutes for Al, important changes take place in the magnetism as well as in the structural properties. Alloys in the two composition series Fe{sub 75}Al{sub 25-x}Si{sub x} (x=0, 7.5, 12.5, 17.5, 25) and Fe{sub 70}Al{sub 30-x}Si{sub x} (x=0, 9, 15, 21, 30) were prepared by induction melting; afterwards they were crushed and then annealed in order to recover the DO{sub 3} stable phase. The deformed FeAl samples show larger lattice parameters than the ordered ones; however, this difference ({delta}a) decreases when Si substitutes for Al until it becomes zero (i.e. until the ordered samples and the deformed ones have the same lattice parameters). This trend is the same for both sample series and does not depend on the Fe content of the alloy. However, the magnetization has a different behaviour depending on the Fe content. For deformed Fe{sub 75}Al{sub 25-x}Si{sub x} alloys the saturation magnetization decreases with increasing Si content while for Fe{sub 70}Al{sub 30-x}Si{sub x} deformed alloys the saturation magnetization has a plateau in which the saturation magnetization values do not vary.

  14. Interfacial characterization of Al-Al thermocompression bonds

    Energy Technology Data Exchange (ETDEWEB)

    Malik, N., E-mail: nishantmalik1987@gmail.com [Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1032, Blindern, N-0315 Oslo (Norway); SINTEF ICT, Department of Microsystems and Nanotechnology, P.O. Box 124 Blindern, N-0314 Oslo (Norway); Carvalho, P. A. [SINTEF Materials and Chemistry, Department of Materials and Nanotechnology, P.O. Box 124 Blindern, N-0314 Oslo (Norway); Poppe, E. [SINTEF ICT, Department of Microsystems and Nanotechnology, P.O. Box 124 Blindern, N-0314 Oslo (Norway); Finstad, T. G. [Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1032, Blindern, N-0315 Oslo (Norway)

    2016-05-28

    Interfaces formed by Al-Al thermocompression bonding were studied by the transmission electron microscopy. Si wafer pairs having patterned bonding frames were bonded using Al films deposited on Si or SiO{sub 2} as intermediate bonding media. A bond force of 36 or 60 kN at bonding temperatures ranging from 400–550 °C was applied for a duration of 60 min. Differences in the bonded interfaces of 200 μm wide sealing frames were investigated. It was observed that the interface had voids for bonding with 36 kN at 400 °C for Al deposited both on Si and on SiO{sub 2}. However, the dicing yield was 33% for Al on Si and 98% for Al on SiO{sub 2}, attesting for the higher quality of the latter bonds. Both a bond force of 60 kN applied at 400 °C and a bond force of 36 kN applied at 550 °C resulted in completely bonded frames with dicing yields of, respectively, 100% and 96%. A high density of long dislocations in the Al grains was observed for the 60 kN case, while the higher temperature resulted in grain boundary rotation away from the original Al-Al interface towards more stable configurations. Possible bonding mechanisms and reasons for the large difference in bonding quality of the Al films deposited on Si or SiO{sub 2} are discussed.

  15. Thermal Modeling of Al-Al and Al-Steel Friction Stir Spot Welding

    Science.gov (United States)

    Jedrasiak, P.; Shercliff, H. R.; Reilly, A.; McShane, G. J.; Chen, Y. C.; Wang, L.; Robson, J.; Prangnell, P.

    2016-09-01

    This paper presents a finite element thermal model for similar and dissimilar alloy friction stir spot welding (FSSW). The model is calibrated and validated using instrumented lap joints in Al-Al and Al-Fe automotive sheet alloys. The model successfully predicts the thermal histories for a range of process conditions. The resulting temperature histories are used to predict the growth of intermetallic phases at the interface in Al-Fe welds. Temperature predictions were used to study the evolution of hardness of a precipitation-hardened aluminum alloy during post-weld aging after FSSW.

  16. Explosive destruction of 26Al

    Science.gov (United States)

    Kahl, D.; Yamaguchi, H.; Shimizu, H.; Abe, K.; Beliuskina, O.; Cha, S. M.; Chae, K. Y.; Ge, Z.; Hayakawa, S.; Kwag, M. S.; Kim, D. H.; Moon, J. Y.; Park, S. Y.; Yang, L.

    2017-09-01

    The γ -ray emission associated with the radioactive decay of 26Al is one of the key pieces of observational evidence indicating stellar nucleosynthesis is an ongoing process in our Galaxy, and it was the first such radioactivity to be detected. Despite numerous efforts in stellar modeling, observation, nuclear theory, and nuclear experiment over the past four decades, the precise sites and origin of Galactic ^{26} Al remain elusive. We explore the present experimental knowledge concerning the destruction of ^{26} Al in massive stars. The precise stellar rates of neutron-induced reactions on ^{26} Al, such as (n,p) and (n, α , have among the largest impacts on the total ^{26} Al yield. Meanwhile, reactions involving the short-lived isomeric state of ^{26} Al such as radiative proton capture are highly-uncertain at present. Although we presented on-going experimental work from n_TOF at CERN with an ^{26} Al target, the present proceeding focuses only on the ^{26} Al isomeric radioactive beam production aspect and the first experimental results at CRIB.

  17. Philosophieren als Unterrichtsprinzip im Mathematikunterricht

    Science.gov (United States)

    Meerwaldt, Diana

    Philosophieren und Mathematik scheinen zunächst gegensätzliche Bereiche zu sein, die sich kaum vereinbaren lassen. Dies trifft für eine Auffassung zu, die Philosophieren als "Gerede" disqualifiziert und Mathematik als eine reine "Formelwissenschaft" begreift. Beide Auffassungen werden den Gegenständen nicht gerecht.

  18. 81 - 87 Iwuala et al.

    African Journals Online (AJOL)

    User

    given to patients suffering from kidney diseases. (Okujagu et al., 2006). ... management of rheumatism has been documented. (Ikewuchi et al . ... such as light, water as well as salinity are important variables ..... Ecotoxicology and Environmental Safety, 60: 324- ... Nigerian Journal of Pharmacy, 11: 117-118. Sofowora, A.

  19. El miedo al rey

    Directory of Open Access Journals (Sweden)

    François FORONDA

    2007-01-01

    Full Text Available La peur du roi. Sources et premières réflexions à propos d’une émotion aristocratique dans la Castille du XIVe siècleFace à un roi qui à présent pousse les effets de son ire jusqu’au meurtre pour faire le vide autour de lui et imposer sa différence souveraine, ses parents et les riches hommes, soit les principaux visés par cette politique de l’arbitraire qui enfreint les règles du jeu autant qu’elle contribue à les redéfinir, disent la peur (metus qu’ils ressentent, qu’ils utilisent aussi afin de donner à leur stratégie de pouvoir un fondement légitime. Et l’expression de cette émotion politique, qui tend à se muer en un stéréotype d’un discours aristocratique d’opposition, surtout présente dans les chroniques, mises ici en relation ici avec d’autres sources, notamment des correspondances, marque profondément l’histoire des relations souvent conflictuelles au sein de cette compagnie en définitive très étroite pendant un siècle, de la fin du XIIIe siècle à la fin du XIVe siècle. Cet article se propose d’ébaucher une première réflexion sur le sujet et d’en présenter les principales sources.El miedo al rey. Fuentes y primeras reflexiones acerca de una emoción aristocrática en la Castilla del siglo XIVFrente a un rey que ahora lleva hasta la muerte los efectos de su ira para hacer el vacío entorno a su persona e imponer su soberana, sus parientes y ricos hombres, o sea los principales afectados por esta política de la arbitrariedad que rompe las reglas del juego a la vez que contribuye a redefinirlas, dicen el miedo (metus que sienten, que utilizan también para darle a su estrategia de poder un fundamento legítimo. Y la expresión de esta emoción política, que tiende a convertirse en un estereotipo de un discurso aristocrático de oposición, sobre todo presente en la crónicas, aquí puestas en relación con otras fuentes, en particular cartas, marca profundamente la historia de

  20. MAHARATA AL-ISTIQBAL FI AL-KITAB AL-MADRASI BI AL-MADRASAH AL-TSANAWIYAH AL-ISLAMIYAH

    Directory of Open Access Journals (Sweden)

    Muhammad Qadhafi

    2017-06-01

    Full Text Available This study aimed to identify the contents of listening and reading skills in the Arabic textbook “Durus al-Lughah al-Arabiyah.” This study was conducted qualitatively and employed a descriptive analysis technique. The population was the Arabic textbook which applied 2013 Curriculum for the tenth graders at the Islamic senior high schools. Data collection procedures involved making the checklist, analyzing the contents of the textbook, coding, tabulating data, and concluding. The research found both listening and reading skill materials in the textbook was sufficient according to Abd al-Rahman al-Fauzan. However, there were still some weaknesses. There were no introductory materials about the sound and the introduction of the long and short vowels. In addition, the CD/recording was unavailable for listening. Lastly, there was no picture in each title to help students’ comprehension. But, the content of listening and reading skills in the textbook were relevant to 2013 Curriculum for Arabic language subject.

  1. Quantum dots formed in InSb/AlAs and AlSb/AlAs heterostructures

    Science.gov (United States)

    Abramkin, D. S.; Rumynin, K. M.; Bakarov, A. K.; Kolotovkina, D. A.; Gutakovskii, A. K.; Shamirzaev, T. S.

    2016-06-01

    The crystal structure of new self-assembled InSb/AlAs and AlSb/AlAs quantum dots grown by molecularbeam epitaxy has been investigated by transmission electron microscopy. The theoretical calculations of the energy spectrum of the quantum dots have been supplemented by the experimental data on the steady-state and time-resolved photoluminescence spectroscopy. Deposition of 1.5 ML of InSb or AlSb on the AlAs surface carried out in the regime of atomic-layer epitaxy leads to the formation of pseudomorphically strained quantum dots composed of InAlSbAs and AlSbAs alloys, respectively. The quantum dots can have the type-I and type-II energy spectra depending on the composition of the alloy. The ground hole state in the quantum dot belongs to the heavy-hole band and the localization energy of holes is much higher than that of electrons. The ground electron state in the type-I quantum dots belongs to the indirect X XY valley of the conduction band of the alloy. The ground electron state in the type-II quantum dots belongs to the indirect X valley of the conduction band of the AlAs matrix.

  2. La música popular de la literatura al cine: lenguaje, discurso y significados en Alta Fidelidad y The Commitments

    Directory of Open Access Journals (Sweden)

    Viñuela Suárez, Eduardo

    2010-02-01

    Full Text Available Adapting a novel into a film is not a simple question of translating the narrative plot from one medium to another, it also deals with the cultural competence of the reader / spectator and the meanings and discourses articulated in the interpretation of the texts. Music is present in both novels and films, and so it participates in the process of creating meanings, even when it does not take part in the formal structure of the text. This article develops the analysis of popular music in The Commitments and High Fidelity, two films based on two novels where the ideology of rock music influences both characters and spaces. Songs, musicians and instruments are present in prose, dialogues, sound and image, both in the novels by Roddy Doyle and Nick Hornby, respectively, and in the films directed by Alan Parker and Stephen Frears, thus demonstrating the multimedia condition of music and its capability to interact with the narrative structure of the texts in the articulation of several discourses.

    La adaptación cinematográfica de novelas va más allá de la transposición de la narrativa de un medio de expresión a otro e implica a una serie de discursos que están presentes en la obra y que son activados por el lector-espectador en función de su competencia cultural. La música, presente en ambos medios, es capaz de vehicular mensajes que, aunque no se encuentren en la estructura narrativa de las obras, participan en la creación de significados. En este artículo abordamos un análisis formal y discursivo de la música popular en Alta fidelidad y The Commitments, dos novelas adaptadas al cine en las que la ideología de la cultura rock se manifiesta en personajes y espacios. Canciones, músicos e instrumentos aparecen en texto escrito, diálogos, imagen y sonido en las novelas de Roddy Doyle y Nick Hornby y sus respectivas adaptaciones cinematográficas de Alan Parker y Stephen Frears, demostrando la condici

  3. Al3+-induced vesicle formation

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Aluminium laurate [Al(OOCC11H23)3] was synthesized as a surfactant, which can dissolve in micellar solution of a zwitterionic surfactant, tetradecycldimethylamine oxide (C14DMAO). The phase behavior of the mixtures of Al(OOCC11H23)3 and C14DMAO in water was studied and birefringent Lα-phase was observed. The birefringent Lα-phase consists of vesicles that were demonstrated by Polarizer and Transmission Electron Microscope (TEM) micrographs. Al3+-coordinated vesicles could be used as templating-precursor, providing a vesicle-route for preparation of inorganic nanoscale particles.

  4. AlN synthesis on AlN/SiC template using Li-Al-N solvent

    Energy Technology Data Exchange (ETDEWEB)

    Kangawa, Yoshihiro [RIAM, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580 (Japan); PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama 332-0012 (Japan); Kakimoto, Koichi [RIAM, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580 (Japan)

    2010-06-15

    We investigated the possibility of AlN synthesis using Li-Al-N solvent. In this work, Li-Al-N solvent was obtained by heating a mixture composed of Al and Li{sub 3}N. First, we studied the relationship between Al/Li{sub 3}N composition of the initial mixture and shape of obtained crystal. The results showed that polyhedral crystals instead of needle-like crystals were obtained under an Al-rich condition, i.e., 4/3<Al/Li{sub 3}N<4/1. Next, we performed AlN synthesis on an AlN/SiC template under an Al-rich condition. The results suggested that a large AlN single-phase region was formed by using the template. The possibility of growth of bulk AlN using Li-Al-N solvent was shown by the present investigations. (Abstract Copyright [2010], Wiley Periodicals, Inc.)

  5. Adaptação de instrumento para dimensionar horas diárias de assistência de enfermagem residencial Adaptacion de instrumento para medir horas diarias de atención de enfermería domiciliaria Adaptation of an instrument for the measurement of daily hours for nursing care at patient's home

    Directory of Open Access Journals (Sweden)

    Luiza Watanabe Dal Ben

    2004-03-01

    Full Text Available O Therapeutic Intervention Scoring System Intermediate: TISS-Intermediário foi traduzido para a língua portuguesa e adaptado para estabelecer horas diárias de assistência domiciliar. O processo de modificação do instrumento, desenvolvido através da Técnica Delphi, teve como participantes 16 enfermeiros, que atuam em empresas de assistência domiciliar e determinam horas diárias de assistência de enfermagem para pacientes na residência, após a hospitalização. Ao término do estudo obteve-se um instrumento com 104 itens, para ser no futuro validado clinicamente. Tal instrumento ajudará enfermeiros a estender cuidados de enfermagem a pacientes em casa, após a alta hospitalar, especialmente na tomada de decisões relativas à avaliação dos pacientes.El Therapeutic Intervention Scoring System Intermediate: TISS-Intermedio, fue traducido para el idioma portugués y adaptado para establecer las horas diarias de asistencia en el domicilio. Dieciséis enfermeros participaron del proceso de modificación del instrumento desarrollado a través de la Técnica Delphi. Esos enfermeros actúan en empresas de atención a domicilio y determinan las horas diarias de atención de enfermería a los pacientes en su domicilio después del alta. Al término del estudio se obtuvo un instrumento con 104 items para ser validado clínicamente.Tal instrumento ayudará a los enfermeros a extender sus cuidados de enfermería a pacientes que se encuentran en casa, después del alta hospitalario, especialmente en la toma de decisiones relacionadas con la evaluación de los pacientes.The Therapeutic Intervention Scoring System Intermediate: TISS-Intermediate, was translated into Portuguese and adapted to establish the number of hours daily of home care. The adaptation process of the instrument, developed with the Delphi Technique, used 16 nurses, who work in home care service providers and helped in calculating the number of nursing care hours for patients at

  6. Oke et al (3).cdr

    African Journals Online (AJOL)

    Timothy Ademakinwa

    The study revealed that flow in pipe network analysis varied with the method. ... Figure 2a: Global Sanitation Coverage Trends in urban and Rural Areas, 1990 – 2011 (JMP, 2013; Oke et al., ...... WaterResouces Management.28: 2012- 2034.

  7. 39 - 45_Maikai et al.

    African Journals Online (AJOL)

    User

    and high mortality (Anosa, 1983; Allam et al., 2011; .... Values obtained are expressed as mean ± SEM. .... weight and haematological parameters in ... Trypanosoma brucei infection in deer mice .... rates and liver pathology of Trypanosoma.

  8. EKSKURSO AL CANGYAN-MONTO

    Institute of Scientific and Technical Information of China (English)

    Verkita; de; Li; Shijun

    1999-01-01

    La Pekina Esperanto-Asocio preskaǚ sta-rigis tradicion organizi ekskurson printempe kajaǚtune. En la pasinta jaro, ni ekskursis al In-terna Mongolio kaj habis agrablajn renkontiojnkun geesperantistoj en Huhehot kaj Baotou. i-

  9. Obituaries: Zainab al-Ghazali

    National Research Council Canada - National Science Library

    Matt Horton

    2005-01-01

    An obituary for Zainab al-Ghazali, an outspoken advocate of shariah law and an ally of the underground Muslim Brotherhood who founded her own organization, the Muslim Women's Association in 1937, is presented...

  10. Ab initio modeling of zincblende AlN layer in Al-AlN-TiN multilayers

    Energy Technology Data Exchange (ETDEWEB)

    Yadav, S. K., E-mail: syadav@lanl.gov, E-mail: yadav.satyesh@gmail.com, E-mail: xyliu@lanl.gov; Liu, X.-Y., E-mail: syadav@lanl.gov, E-mail: yadav.satyesh@gmail.com, E-mail: xyliu@lanl.gov [Materials Science and Technology Division, MST-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Wang, J. [Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588 (United States)

    2016-06-14

    An unusual growth mechanism of metastable zincblende AlN thin film by diffusion of nitrogen atoms into Al lattice is established. Using first-principles density functional theory, we studied the possibility of thermodynamic stability of AlN as a zincblende phase due to epitaxial strains and interface effect, which fails to explain the formation of zincblende AlN. We then compared the formation energetics of rocksalt and zincblende AlN in fcc Al through direct diffusion of nitrogen atoms to Al octahedral and tetrahedral interstitials. The formation of a zincblende AlN thin film is determined to be a kinetically driven process, not a thermodynamically driven process.

  11. Al clamor de les vuvuzeles

    Directory of Open Access Journals (Sweden)

    Javier Olivera Betrán

    2010-09-01

    Full Text Available El Mundial de Futbol de Sud-àfrica ha situat l’Àfrica al mapa mundial i ha mostrat al món el triomf de l’estil de futbol d’Espanya basat en la col·lectivitat, l’esperit d’equip, la humilitat, la cohesió interna i el joc bonic. L’organització africana, seriosa i eficaç, ha sabut mobilitzar i il·lusionar la població del país que ha participat en el mundial des de l’orgull de ser africà, amb l’esperit alegre, festiu i també reivindicatiu de la gent de l’Àfrica. Aquest esdeveniment suposa el llançament de la marca “Sud-àfrica” al món amb un avís clar d’optar a l’organització d’uns primers Jocs Olímpics a Àfrica (potser els de 2020. S’obre una finestra d’esperança al segle xxi per al continent perdut de la mà de l’esport espectacle tan universal, massiu, emocional i mercantil que també es juga a la canxa de la política i de l’economia.

  12. Conjuntivitis alérgica

    Directory of Open Access Journals (Sweden)

    Alejandro Tello Hernández

    2008-07-01

    Full Text Available La conjuntivitis alérgica es una de las causas más comunesde consulta externa en oftalmología y tiene una muy altarelación con las reacciones alérgicas sistémicas. Lafisiopatología de las reacciones de hipersensibilidad noshace entender los cuadros clínicos característicos de estapatología y sus diferentes grados de severidad. Eldiagnostico diferencial es amplio, sin embargo hay clavesdiagnosticas que nos orientan rápidamente al diagnosticocorrecto. El tratamiento se enfoca en las medidasfarmacológicas y no farmacológicas, utilizándolas enconjunto para disminuir la recurrencia del cuadro y prevenirsecuelas visuales.

  13. Al Zubarah - eine vergessene Legende

    DEFF Research Database (Denmark)

    Kinzel, Moritz

    2014-01-01

    Die im 18. Jahnhundert an der Nordwestküste Katars entstandene Handelsstadt Al Zubarah bildet den Forschungsschwerpunkt des Qatar Islamic Archaeology and Heritage Projects (QIAH), das die Universität Kopenhagen in Zusammenarbeit mit der Katarischen Museumsbehörde (QMA) seit 2009 durchführt. Neben...... der archäologischen Erforschung der Stadtanlage und ihrer Elemente, stehen die Erhaltung und Präsentation des Fundortes und seiner Bauten von Anfang an ebenfalls im Fokus der Arbeiten. Auf Grundlage der Projektarbeit wurde 2011 der Antrag auf Aufnahme von Al Zubarah in die Weltkulturerbe eingereicht....... Die Stadtanlage ist ein einzigartiges Beispiel für eine planmäßig angelegte Stadt mit allen typischen Elementen einer orientalischen Stadt: Souq, Moschee, Hofhausquartiere und turmbewehrter Stadtmauer. Die Blütezeit von Al Zubarah währte nur gut 50 Jahre. 1811 wurde sie bereits wieder zerstört. Einige...

  14. PENDIDIKAN MENURUT AL-GHAZALI

    Directory of Open Access Journals (Sweden)

    Syamsul Kurniawan

    2016-12-01

    Full Text Available Education reform efforts typically begin with a conceptual perspective before implementation. Thus, developing Islamic education usually begins with a study of a figure and his educational thought. And one of the most influential figures whose thought which has Sufi religious pattern has dominated educational thinking atmosphere over the centuries since his death. The purpose of education according to al-Ghazali was to get closer to Allah. He came with a view that the most noble job is to educate: to become a teacher. Al-Ghazali advised that his students, in the learning process, aim to become scientists who could disseminate their knowledge for the sake of humanity values. Keywords: Al-Ghazali, Thought, Islamic Education.

  15. FTD and ALS: genetic ties that bind.

    Science.gov (United States)

    Orr, Harry T

    2011-10-20

    Curiously, amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), seemingly disparate neurodegenerative disorders, can be inherited together. Two groups (DeJesus-Hernandez et al. and Renton et al.) show that the long sought after ALS/FTD mutation on chromosomal region 9p is a hexanucleotide expansion in C90RF72. These studies, plus a study on X-linked ALS/FTD, provide molecular starting points for identifying pathways that link ALS and FTD pathogenesis.

  16. Superconductivity in Al/Al2O3 interface

    Science.gov (United States)

    Palnichenko, A. V.; Vyaselev, O. M.; Mazilkin, A. A.; Khasanov, S. S.

    2016-06-01

    Metastable superconductivity at Tc ≈ 65 K has been observed in Al foil subjected to special oxidation process, according to the ac magnetic susceptibility and electrical resistance measurements. Comparison of the ac susceptibility and the dc magnetization measurements infers that the superconductivity arises within the interfacial granular layer formed during the oxidation process between metallic aluminum and its oxide.

  17. Fenomenologi Niat : Antara al-Ghazali dan al-Sayuthi

    Directory of Open Access Journals (Sweden)

    Mujiburrahman Mujiburrahman

    2011-12-01

    Full Text Available The evolusionist and functionalist approaches to religion are generally considered less sympathetic if not antipathy to religious phenomena. This is why, some western scholars propose another approach to study religion called ‘phenomenological’ approach. There have been a number of phenomenological studies of religion, but mostly not of  Islam. This article tries to fill in the gap by describing and analyzing the Islamic conception of intention (niyyah developed by al-Sayuthi and al-Ghazali. As a jurist, al-Sayuthi explores different formal rules on niyyah in Islamic jurisprudence, while al-Ghazali as a Sufi, tries to deepen the meaning of niyyah in relation to one’s sincerity to God. Apart from this difference, both conceptions of niyya indicate that as believers, Muslims always attempt to live in the sacred space and time, and make their speech and deed sacred based on the niyyah. Thus, niyya is the very basis of Muslim religious life.

  18. estigma tolerable al estigma intolerable

    Directory of Open Access Journals (Sweden)

    Nelson Arteaga Botello

    2006-01-01

    cristalización pasa por dos referentes de interacción y relación social al interior del espacio escolar. El primero está constituido por parámetros de normalidad y anormalidad a partir de la localización de estigmas. El segundo se encuentra, a contrapelo de la tendencia anterior, tratando de diluir los efectos de los estigmas al señalarlos como una práctica de tipificación social intolerable o inaceptable.

  19. La neuroplasticidad aplicada al deporte

    OpenAIRE

    Fernández, Hernán

    2015-01-01

    Me decidí a realizar la siguiente ponencia, para analizar y reconocer la importancia que implica el trabajo cognitivo en el entrenamiento deportivo. El abordaje que efectuaré, está enfocado en el desarrollo del entrenamiento cognitivo, su fundamento y el desarrollo de la neuroplasticidad. Analizaré el concepto de neuroplasticidad y neurogénesis como base al sustento teórico de la neurociencia aplicada al deporte. También remarcaré diversas metodologías prácticas, con su fundamento teóri...

  20. De la contingencia al destino

    Directory of Open Access Journals (Sweden)

    Heller, Agnes

    1991-10-01

    Full Text Available Not available.

    La modernidad no ha podido dar respuesta al problema de la contingencia histórica, El texto muestra, por medio de metáforas, que el abandono necesario de esta cuestión no significa que estemos abocados al relativismo respecto a la contingencia existencial. La contingencia existencial, individual, sigue presente en la vida de todo individuo. Se sostiene que podemos dar un destino a nuestras vidas, y ésta es la tarea principal del filósofo.

  1. Al-Qaeda Since 911

    OpenAIRE

    Brahimi, Alia

    2012-01-01

    Seconds after smiling at her local MP and shaking his hand, Roshonara Choudhry plunged a knife into his stomach. The attack on Stephen Timms in May 2010 was not the most high profile assault inspired by al- Qaeda, nor was it fatal. It did, however, offer a commentary on the changing nature of the terrorist threat since 9/11, al-Qaeda’s major impact on international relations as well as its major failure, and the intimate, perhaps inevitable, connection between the two.

  2. La neuroplasticidad aplicada al deporte

    OpenAIRE

    Fernández, Hernán

    2015-01-01

    Me decidí a realizar la siguiente ponencia, para analizar y reconocer la importancia que implica el trabajo cognitivo en el entrenamiento deportivo. El abordaje que efectuaré, está enfocado en el desarrollo del entrenamiento cognitivo, su fundamento y el desarrollo de la neuroplasticidad. Analizaré el concepto de neuroplasticidad y neurogénesis como base al sustento teórico de la neurociencia aplicada al deporte. También remarcaré diversas metodologías prácticas, con su fundamento teóri...

  3. Drogodependencia y derecho al honor

    OpenAIRE

    Moliner Navarro, Rosa María

    2014-01-01

    Resulta frecuente hoy la divulgación de la drogodependencia de algunos personajes públicos en los medios que se dedican a la información social. Acudiendo a la jurisprudencia más reciente en la materia, el artículo analiza el habitual conflicto entre el derecho al honor y el derecho a la libertad de información; identifica los criterios actualmente vigentes en la protección del derecho al honor y señala el límite que la libertad de información nunca puede traspasar en la revela...

  4. ¿COLOMBIA DEBE APOSTARLE AL SOFTWARE LIBRE, AL DE FUENTE ABIERTA O AL PROPIETARIO?

    Directory of Open Access Journals (Sweden)

    Luis Alberto Girón Murillo

    2014-06-01

    Full Text Available Es complejo para gestores y administradores conocer las implicaciones que la adopción de modelos de desarrollo de software tendría para una región. Este artículo ofrece una evaluación de las implicaciones dinámicas que para el desarrollo de software de una región tendría el apostar de forma excluyente al software libre, al software de fuente abierta y al software propietario. Se desarrolló un modelo de simulación en Vensim de la dinámica de sistemas en donde se evaluaron 3 escenarios: uno en donde se adopta de forma excluyente el software libre, uno en donde se adopta el software propietario y uno en donde se adopta el software de fuente abierta. Se ofrecen descripciones y explicaciones de los resultados que sugieren las potencialidades de cada uno de los modelos de desarrollo evaluados.

  5. MOOCs; vanwaar al die ophef?

    NARCIS (Netherlands)

    Henderikx, Maartje; Kreijns, Karel

    2016-01-01

    MOOCs; vanwaar die ophef? Het nog maar zeer recente fenomeen MOOCs (massive open online courses) heeft zich in korte tijd al een onwrikbare positie weten in te nemen in het open online onderwijs. De hype rondom deze nieuwe manier van onderwijs geven bereikte zijn hoogtepunt in 2012, dat prompt werd

  6. Un controesempio al Modus Ponens

    Directory of Open Access Journals (Sweden)

    Vann McGee

    2011-11-01

    Full Text Available La traduzione dell’articolo è stata resa possibile grazie al consenso dell’autore e del Journal of Philosophy. Riferimenti originali: Vann McGee (1985: “A Counterexample to Modus Ponens”, Journal of Philosophy, Vol. 82, No. 9 (Sep. 1985, pp. 462-47. [N.d.T.

  7. Al Zubarah - eine vergessene Legende

    DEFF Research Database (Denmark)

    Kinzel, Moritz

    2014-01-01

    Jahre später auf einem Sechstel der ursprünglichen Siedlungsfläche wiedererrichtet und dann im ausgehenden 19. Jahrhundert / beginnenden 20. Jahrhundert endgültig aufgeben. Die Stadt lebt als Legende im Bewusstsein der katarischen Bevölkerung, doch der Name wird heute nicht mit der Stadtanlage sondern...

  8. Kringloop als basis van bedrijfsvoering

    NARCIS (Netherlands)

    Linde, van der A.

    2007-01-01

    Gerard Keurentjes bekijkt zijn bedrijf als kringloop waarin grond en koeien de spil zijn. Het gebruik van microbiotica in plaats van antibiotica past daarin perfect. Een microbioticum bestaat uit een mengsel van acht kruiden opgelost in alcohol. Onderzoek toont aan dat het de productie van witte blo

  9. Der Nutzer als besserer Fachreferent?

    Directory of Open Access Journals (Sweden)

    Robert Scheuble

    2014-12-01

    Full Text Available Am 9. Juli 2014 veranstaltete der VDB-Regionalverband Südwest in Kooperation mit der Deutschen Nationalbibliothek in Frankfurt am Main eine Fortbildungsveranstaltung zum Thema „Der Nutzer als besserer Fachreferent?”, die sich mit Formen von und Erfahrungen mit nutzergesteuerter Erwerbung (PDA in wissenschaftlichen Bibliotheken beschäftigte.

  10. AlGaN solar-blind avalanche photodiodes with AlInN/AlGaN distributed Bragg reflectors

    Science.gov (United States)

    Yao, Chujun; Ye, Xuanchao; Sun, Rui; Yang, Guofeng; Wang, Jin; Lu, Yanan; Yan, Pengfei; Cao, Jintao

    2017-06-01

    AlGaN solar-blind avalanche photodiodes (APDs) with AlInN/AlGaN distributed Bragg reflectors (DBRs) operated at lower avalanche breakdown voltage are numerically demonstrated. The p-type AlGaN layer and the multiplicative layer with low Al composition are introduced to construct the polarization-induced electric field, which can significantly reduce the avalanche breakdown voltage of the APDs. Calculated results exhibit that the avalanche breakdown voltage of the designed APDs decrease by 13% compared with the conventional device structure. Simultaneously, an improved solar-blind spectral responsivity is achieved due to the inserted AlInN/AlGaN DBRs.

  11. Personalidad y tolerancia al dolor

    Directory of Open Access Journals (Sweden)

    JESÚS M.ª CARRILLO

    2005-01-01

    Full Text Available Se examina la relación de algunas variables de personalidad -EPQ-A (Eysenck y Eysenck, 1975, NEO-PI (McCrae y Costa, 1988 y STA -personalidad esquizotípica- y STB -personalidad límite-, de Claridge y Broks (1984, con la tolerancia al dolor experimental inducido mediante agua fría (cold pressor test, según el procedimiento de Staats, Heckmat y Staats (1998 en una muestra filtrada mediante un cuestionario sobre dolor crónico, dolores de cabeza, de espalda, artritis, síndrome de Raynaud, y personas bajo medicación. La tolerancia al dolor experimental se evaluó mediante el Umbral del dolor (tiempo en segundos desde la introducción de la mano en el agua hasta el primer informe de dolor, Mantenimiento del dolor (duración en segundos de la inmersión de la mano desde la aparición del umbral hasta su retirada y Tolerancia al dolor (duración total en segundos de la inmersión de la mano desde su introducción hasta su retirada. Un análisis correlacional, factorial y de regresión por pasos mostraron un efecto cruzado entre medidas de ansiedad (tolerancia negativa al dolor y psicoticismo, siendo psicoticismo junto con control emocional predictores de tolerancia positiva al dolor. En cuanto a psicoticismo, parece que son sus elementos de naturaleza paranoide y de "dureza" los que afectan a una percepción atenuada del dolor.

  12. First principles calculation of ac conductance for Al-BDT-Al and Al-Cn-Al systems

    Directory of Open Access Journals (Sweden)

    Jia-Ning Zhuang

    2011-12-01

    Full Text Available We perform first-principles calculation to investigate the dynamic conductance of atomic wires of the benzenedithiol (BDT as well as carbon chains with different length in contact with two Al(100 electrodes (Al-Cn-Al. Our calculation is based on the combination of the non-equilibrium Green's function and the density functional theory. For ac conductance, there are two theories that ensures the current conservation: (1. the global formula which is a phenomenological theory that partitions the total displacement current into each leads so that the current is conserved.(2. the local formula which is a microscopic theory that includes Coulomb interaction explicitly so that the current is conserved automatically. In this work, we use the local formula to calculate the dynamic conductance, especially the emittance. We give a detailed comparison and analysis for the results obtained from two theories. Our numerical results show that the global formula overestimates the emittance by two orders of magnitude. We also obtain an inequality showing that the emittance from global formula is greater than that from local formula for real atomic structures. For Al-Cn-Al structures, the oscillatory behavior as the number of carbon chain N varies from even to odd remains unchanged when local formula is used. However, the prediction of local formula gives rise to opposite response when N is odd (inductive-like as compared with that of global formula. Therefore, one should use the local formula for an accurate description of ac transport in nanoscale structures. In addition, the ‘size effect’ of the ac emittance is analyzed and can be understood by the kinetic inductance. Since numerical calculation using the global formula can be performed in orbital space while the local formula can only be used in real space, our numerical results indicate that the calculation using the local formula is extremely computational demanding.

  13. Large rectification magnetoresistance in nonmagnetic Al/Ge/Al heterojunctions.

    Science.gov (United States)

    Zhang, Kun; Li, Huan-Huan; Grünberg, Peter; Li, Qiang; Ye, Sheng-Tao; Tian, Yu-Feng; Yan, Shi-Shen; Lin, Zhao-Jun; Kang, Shi-Shou; Chen, Yan-Xue; Liu, Guo-Lei; Mei, Liang-Mo

    2015-09-21

    Magnetoresistance and rectification are two fundamental physical properties of heterojunctions and respectively have wide applications in spintronics devices. Being different from the well known various magnetoresistance effects, here we report a brand new large magnetoresistance that can be regarded as rectification magnetoresistance: the application of a pure small sinusoidal alternating-current to the nonmagnetic Al/Ge Schottky heterojunctions can generate a significant direct-current voltage, and this rectification voltage strongly varies with the external magnetic field. We find that the rectification magnetoresistance in Al/Ge Schottky heterojunctions is as large as 250% at room temperature, which is greatly enhanced as compared with the conventional magnetoresistance of 70%. The findings of rectification magnetoresistance open the way to the new nonmagnetic Ge-based spintronics devices of large rectification magnetoresistance at ambient temperature under the alternating-current due to the simultaneous implementation of the rectification and magnetoresistance in the same devices.

  14. ATSAR THARIQAH AL-QIRA'AH AL-MUTAKARRIRAH FI MAHARAH AL-KITABAH

    Directory of Open Access Journals (Sweden)

    Rihlah

    2016-06-01

    Full Text Available This study aimed to reveal the students' writing skill, namely dictation (Imlâ’ and to analyze the use of the repeated reading technique in learning Qirâ'ah Jahriyyah, as well as to determine the effect of the use of al-Qirâ'ah al-Mutakarrirah technique on the students' skills in writing dictation. This method was used to improve students’ reading fluency at the beginners’ level, which was popularized by Samuel in 1979. This research used the experimental method through pretest and posttest control group design. The samples of the research were 44 students consisted of 22 students the experimental class and 22 students of the control class. The analysis of the data applied t-test. The results showed that the use of was significant on the students' writing skill in dictation. It was based on the tcount, 2.64, and ttable, 2.02, at the significance level of 5%. The al-Qirâ'ah al-Mutakarrirah technique was thus effectively used to develop the beginner-leveled students’ writing skill, especially dictation.

  15. Effect of interface geometry on electron tunnelling in Al/Al2O3/Al junctions

    Science.gov (United States)

    Koberidze, M.; Feshchenko, A. V.; Puska, M. J.; Nieminen, R. M.; Pekola, J. P.

    2016-04-01

    We investigate how different interface geometries of an Al/Al2O3 junction, a common component of modern tunnel devices, affect electron transport through the tunnel barrier. We study six distinct Al/Al2O3 interfaces which differ in stacking sequences of the metal and the oxide surface atoms and the oxide termination. To construct model potential barrier profiles for each examined geometry, we rely on first-principles density-functional theory (DFT) calculations for the barrier heights and the shapes of the interface regions as well as on experimental data for the barrier widths. We show that even tiny variations in the atomic arrangement at the interface cause significant changes in the tunnel barrier parameters and, consequently, in electron transport properties. Especially, we find that variations in the crucial barrier heights and widths can be as large as 2 eV and 5 Å, respectively. Finally, to gain information about the average properties of the measured junction, we fit the conductance calculated within the Wentzel-Kramers-Brillouin approximation to the experimental data and interpret the fit parameters with the help of the DFT results.

  16. Al-Ḥaqīqah al-Muwāfaqah li al-Sharī‘ah: al-Taṣāluḥ bayn al-Taṣawuf wa al-Sharī‘ah bi Nusantara fi al-Qarn al-Sādis ‘Ashr al-Mīlādī

    OpenAIRE

    Iin Suryaningsih

    2013-01-01

    This article discusses the reinterpretation of waḥdat al-wujūd doctrine among Muslims of the archipelago, using the sharī‘ah approach in Sufism as suggested by Al-Būrhanpūrī (d.1620) in his work al-Haqīqah al-Muwāfaqah li al-Sharī‘ah. This work is one of the commentaries (sharḥ) from al-Tuḥfah al-Mursalah ila rūḥ al-Nabī SAW, that invited much debate among Muslims of the archipelago. Al-Būrhanpūrī’s detailed interpretation of waḥdat al-wujūd doctrine proved that the essence of the concep...

  17. Relativity and Al^+ Optical Clocks

    Science.gov (United States)

    Chou, Chin-Wen; Hume, David B.; Wineland, David J.; Rosenband, Till

    2010-03-01

    We have constructed an optical clock based on quantum logic spectroscopy of an Al+ ion that has a fractional frequency inaccuracy of 8.6x10-18. The frequency of the ^1S0^3P0 clock transition is compared to that of a previously constructed Al^+ optical clock with a statistical measurement uncertainty of 7.0x10-18. The two clocks exhibit a relative stability of 2.8x10-15&-1/2circ;, and a fractional frequency difference of -1.8x10-17, consistent with the accuracy limit of the older clock. By comparing the frequencies of the clocks, we have observed relativistic effects, such as time dilation due to velocities less than 10 m/s and the gravitational red shift from a 0.33 m height change of one of the clocks.

  18. Al-Anon and recovery.

    Science.gov (United States)

    Cermak, T L

    1989-01-01

    The history of Al-Anon and its current demographics are reviewed. In order to understand 12-step recovery and psychotherapy for family members of alcoholics, the concept of codependence is defined with a set of diagnostic criteria consistent with the DSM-III-R definition of personality traits and disorders. At the core of codependence are denial and an unrealistic relationship to willpower. The therapeutic implications of considering codependence as a personality disorder are explored, as are the characteristics that make codependence unique among personality disorders: the central role of denial and the existence of a self-help organization to facilitate recovery. The dynamics of working the 12 steps on codependent characteristics are outlined. A synergistic relationship between psychotherapy and the 12 steps is described. Special attention is given the emergence of Al-Anon adult children of alcoholic meetings, and the future of codependence is discussed.

  19. Cardio-respiratory survey of coal industry workers. Adaptacion cardiorespiratoria de los mineros del carbon

    Energy Technology Data Exchange (ETDEWEB)

    1991-01-01

    The aim of this project is to establish the range of acceptable heart rates among mineworkers who are performing the most strenuous types of work, i.e. hammer-drill operators, borehole drillers, drilling assistants, etc. In order to do this, researchers selected as representative a sample group as possible in respect of age and work load. 7 figs.

  20. Jefatura masculina en hogares monoparentales: adaptaciones de los hombres a las necesidades de sus hijos

    National Research Council Canada - National Science Library

    Andrés Mauricio Cano Rodas; María Eugenia Motta Ariza; Luis Enrique Valderrama Tibocha; Carlos Alberto Gil Vargas

    2016-01-01

    ... en el 2014, en la que se indagó a padres pertenecientes a hogares monoparentales con jefatura masculina sobre los cambios y los significados de lo que para ellos constituyen la paternidad y la masculinidad, a través...

  1. ADAPTACION DE LA FUNCION DEL ROL DE ENFERMERIA, A LOS ESTIMULOS DE JEFES DE SERVICIO

    OpenAIRE

    HERNANDEZ LOPEZ, KARLA NAYELI

    2012-01-01

    La búsqueda constante, hacía la práctica profesional de enfermería, realizada con calidad, exige cambios frecuentes e innovaciones, lo que implican que las actividades de enfermería estén caracterizadas por una dinámica profesional continua. Considerando que las jefes de servicio, son el personal de enfermería que desempeñan sus actividades profesionales, directamente con el personal operativo y que influye, por el ejercicio de sus funciones, en el cuidado otorgado por el pe...

  2. Las Inteligencias Múltiples como marco para atender a los alumnos con adaptaciones curriculares no significativas

    OpenAIRE

    Martí-Saumell, Núria

    2012-01-01

    Nuestra investigación se centra en estudiar las metodologías educativas que facilitan la atención a la diversidad desde la perspectiva de la Teoría de las Inteligencias Múltiples y con una orientación teórico-práctica. El objetivo de nuestro estudio será analizar y seleccionar aquellas metodologías educativas que facilitan la atención a la diversidad dentro del aula, así como analizar el marco que ofrece la Teoría de las Inteligencias Múltiples para atender a la diversidad. A partir de estos ...

  3. Adaptacion de una cepa compatible con Acidithiobacillus ferrooxidans sobre concentrados de calcopirita

    National Research Council Canada - National Science Library

    Mejia, E; Ospina, J.D; Osorno, B.L; Marquez, M.A; Morales, A.L

    2011-01-01

    ... de particula, -200 y -325 serie Tyler de tamices. Los microorganismos fueron adaptados por la disminucion gradual de la fuente principal de energia, sulfato ferroso, y el aumento en el contenido de mineral, para finalmente realizar un subcultivo...

  4. Namadhij Min al-Fikr al-Mali fi al-Islam: Waraqah Ma’lumat Asasiyyah

    Directory of Open Access Journals (Sweden)

    Mustafa Dasuki Kasabah

    2009-03-01

    Full Text Available The renaissance of Islam in various countries has become new phenomenon in the global economy. At the same time it also become the challenge for the Western capitalism and Eastern socialism. This resurrection together with revised ideology and economic system is considered as the strategic solution. Frankly, Islam is the religion which has brought back the core of economy to its position proportionally. In order to get concrete and clear idea on Islamic economy, here the writer presents five books written by Muslim scholars, classic as well as contemporary. The first is Kitab al-Amwal written by Abu Ubaid bin Salam, according to Khalil Harras this book is considered as the best and the most comprehensive book of Islamic economy. The second is Kitab Al-Ahkam al-Sultaniyyah written by Imam Mawardi. The third is Al-Fikr al-Mali written by Ibnu Khaldun, which has high scientific authority from other books, it is systematic as well as contextual. The fourth is al-Iradat al-‘Ammah li al-Daulah al-Islamiyyah fi Sadr al-Islam wa Tatbiqatuha al-Mu’asirah written by Monzer Kahf. The fifth is Al-Nafaqat al-‘Ammah fi Al-Islam: Dirasah Muqaranah written by Yusuf Ibrahim Yusuf. The first three authors are classics and the rest are contemporary.

  5. Al Margen de las Cooperativas

    Directory of Open Access Journals (Sweden)

    Gutiérrez Estrada Julio

    1941-04-01

    Full Text Available El sistema Cooperativista, propiamente hablando, no viene a constituir una doctrina económica, es más bien una práctica, un modo de proceder en provecho de determinada agrupación de individuos que se asocian para defenderse de la usura del comercio y del intermediarismo parasitario. "El movimiento cooperativo es tan viejo como la revolución industrial, y ha crecido paralelamente a ella, podría decirse como una protesta en contra del sistema capitalista industrial. Generalmente se considera que tres principios fundamentales determinan su carácter distintivo. 1-Se esfuerza por dar "servido al costo" a sus miembros antes que beneficiarse del negocio con el público en general. El servicio de un grupo organizado se considera como un medio para obtener el máximum de eficacia con mínimo de desperdicio. 2-Insiste en que los beneficios pecuniarios se distribuyan al miembro como productor, después de deducir solamente el interés del capital al tipo que compite, y los salarios y jornales de los trabajadores. 3-Mantiene el control democrático del negocio por todos los participantes en él".

  6. Wear behaviour of Al 261

    Directory of Open Access Journals (Sweden)

    N. Mathan Kumar

    2016-03-01

    Full Text Available Al 2618 matrix material was mixed with the Silicon Nitride (Si3N4, Aluminium Nitride (AlN and Zirconium Boride (ZrB2 reinforced particles. AMC was synthesized successfully by the stir casting method with the various X-wt.% of reinforcements (X = 0,2,4,6,8. Tribological behaviour was studied in this composite with various temperature conditions. The working conditions were Temperature (°C, Load (N, Velocity (m/s and Sliding Distances (m. Before wear testing the mechanical behaviour has been analysed. EDAX was confirmed by the matrix material composition. The Al 2618 alloy and the reinforcement mixers were confirmed by the X-ray Diffraction analysis. Wear rate (mm3/m, Wear resistance (m/mm3, Specific Wear rate (m/Nm and Co-efficient of friction (μ were analysed with various conditions. The worn surfaces were analysed before and after wear testing by Scanning Electron Microscope (SEM. Influence of process parameters and Percentage of contribution were analysed by Taguchi and Analysis of Variance (ANOVA methods. Genetic Algorithm (GA was adopted for optimizing the best and mean of the wear rate and to identify the exact influence of input parameters.

  7. Vormundschaftsrecht als Grundlage politischer Herrschaft

    Directory of Open Access Journals (Sweden)

    Arne Duncker

    2006-07-01

    Full Text Available In ihrer beachtlichen und sehr gewissenhaft dokumentierten Arbeit über vormundschaftliche Regentschaften im 16. und 17. Jahrhundert beschreibt Pauline Puppel unter ausführlichem Bezug auf zeitgenössische Literatur und Archivalien sowohl die allgemeine Rechtslage im damaligen Reich als auch die Anwendungsfälle in Hessen, wo zwischen 1500 und 1700 insgesamt viermal eine Landgräfin als Vormünderin des Fürsten zur Regentin ihres Landes wurde. Dies steht exemplarisch für eine bereits in der Frühen Neuzeit mögliche und nicht einmal ganz seltene Form politischer Frauenherrschaft, die bisher oft nicht hinreichend gewürdigt wurde. Puppels Untersuchung ist in zwei Hauptteile gegliedert. Der erste Teil (Das juristische Regelwerk“, S. 34-143 behandelt die zeitgenössischen Rahmenbedingungen der durch Frauen ausgeübten Vormundschaft und Regentschaft. Der zweite Abschnitt („Die Landgräfinnen von Hessen als Regentinnen“, S. 144-307 befasst sich mit der Ausfüllung dieser Regeln durch konkrete Fallbeispiele in Gestalt von Leben und Regentschaft der regierenden Landgräfinnen von Hessen.

  8. Armaflex in Burj al Arab; Armaflex im Burj al Arab

    Energy Technology Data Exchange (ETDEWEB)

    Steiner, B.

    2003-07-01

    This article describes the Burj al Arab in Dubai, the unique seven-star high-rise hotel. The construction of the hotel, that is built on 250 piles driven into the sand of an artificial island in the Persian Gulf, is described. In particular, various special materials used in the building are described, as are the luxurious fittings and furnishings of the hotel. The cooling and air-conditioning installations that are necessary as a result of the desert climate of Dubai are described and the use of 'Armaflex' elastomer insulating material for the insulation of refrigeration machines and cold-water piping is discussed.

  9. Microstructure of interaction interface between Al-Si, Zn-Al alloys and Al2O3p/6061Al composite

    Institute of Scientific and Technical Information of China (English)

    许志武; 闫久春; 吕世雄; 杨士勤

    2004-01-01

    Interaction behaviors between Al-Si, Zn-AI alloys and Al2O3p/6061AI composite at different heating temperatures were investigated. It is found that Al2O3p/6061Al composite can be wetted well by AlSi-1, AlSi-4 and Zn-Al alloys and an interaction layer forms between the alloy and composite during interaction. Little Al-Si alloys remain on the surface when they fully wet the composite and Si element in Al-Si alloy diffuses into composite entirely and assembles in the composite near the interface of Al-Si alloy/composite to form a Si-rich zone. The microstructure in interaction layer with Si penetration is still dense. Much more residual Zn-Al alloy exists on the surface of composite when it wets the composite, and porosities appear at the interface of Zn-Al alloy/composite. The penetration of elements Zn, Cu of Zn-Al alloy into composite leads to the generation of shrinkage cavities in the interaction layer and makes the microstructure of Al2 O3p/6061A1 composite loose.

  10. Investigations of Al-Dalang and Al-Hawashat meteorites

    Science.gov (United States)

    Gismelseed, A. M.; Abdallah, S. B.; Al-Rawas, A. D.; Al-Mabsali, F. N.; Widatallah, H. M.; Elzain, M. E.; Yousif, A. A.; Ericsson, T.; Annersten, H.

    2016-12-01

    Mössbauer spectroscopy, X-ray diffraction (XRD) measurements, and electron microprobe analysis (EMPA) have been performed on two meteorites named Al-Dalang and Al-Hawashat after identifying their falling sites in the Western region of Sudan. These two meteorites are ordinary chondrites with similar mineralogy. XRD and EMPA show that the two specimens consist of primary olivine, ortho-pyroxene and later crystallising clino-pyroxene as reaction rims against plagioclase. Fe-metal phases are dominated by kamacite (≈6 wt.% Ni) and minor amounts of tetrataenite (≈52 wt.% Ni). Troilite (FeS) and alabandite (MnS) are optically observed as sulphide phases. The Mössbauer measurements at 295 and 78 K are in agreement with the above characterizations, showing at least two paramagnetic doublets which are assigned to olivine and pyroxene and magnetic sextets assigned to kamacite (hyperfine field ≈33.5 T) and troilite FeS (hyperfine field ≈31 T).

  11. Investigations of Al-Dalang and Al-Hawashat meteorites

    Energy Technology Data Exchange (ETDEWEB)

    Gismelseed, A. M., E-mail: abbasher@squ.edu.om [Sultan Qaboos University, College of Science (Oman); Abdallah, S. B. [University of Khartoum, Department of Geology, Faculty of Science (Sudan); Al-Rawas, A. D.; Al-Mabsali, F. N.; Widatallah, H. M.; Elzain, M. E.; Yousif, A. A. [Sultan Qaboos University, College of Science (Oman); Ericsson, T. [Uppsala University, Department of Physics and Material Sciences (Sweden); Annersten, H. [Uppsala University, Department of Earth Sciences (Sweden)

    2016-12-15

    Mössbauer spectroscopy, X-ray diffraction (XRD) measurements, and electron microprobe analysis (EMPA) have been performed on two meteorites named Al-Dalang and Al-Hawashat after identifying their falling sites in the Western region of Sudan. These two meteorites are ordinary chondrites with similar mineralogy. XRD and EMPA show that the two specimens consist of primary olivine, ortho-pyroxene and later crystallising clino-pyroxene as reaction rims against plagioclase. Fe-metal phases are dominated by kamacite (≈6 wt.% Ni) and minor amounts of tetrataenite (≈52 wt.% Ni). Troilite (FeS) and alabandite (MnS) are optically observed as sulphide phases. The Mössbauer measurements at 295 and 78 K are in agreement with the above characterizations, showing at least two paramagnetic doublets which are assigned to olivine and pyroxene and magnetic sextets assigned to kamacite (hyperfine field ≈33.5 T) and troilite FeS (hyperfine field ≈31 T).

  12. Electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The effects of contents of AlF3 and Al2O3,and temperature on electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 were studied by continuously varying cell constant (CVCC) technique.The results show that the conductivities of melts increase with the increase of temperature,but by different extents.Every increasing 10 ℃ results in an increase of 1.85×10-2,1.86×10-2,1.89×10-2 and 2.20×10-2 S/cm in conductivity for the (Na3AlF6-40%K3AlF6)-AlF3 melts containing 0%,20%,24%,and 30% AlF3,respectively.An increase of every 10 ℃ in temperature results an increase about 1.89×10-2,1.94×10-2,1.95×10-2,1.99×10-2 and 2.10×10-2 S/cm for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts containing 0%,1%,2%,3% and 4% A12O3,respectively.The activation energy of conductance was calculated based on Arrhenius equation.Every increasing 1% of AlF3 results in a decrease of 0.019 and 0.020 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AIF3 melts at 900 and 1 000 ℃,respectively.Every increase of 1% Al2O3 results in a decrease of 0.07 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts.The activation energy of conductance increases with the increase in content of AlF3 and Al2O3.

  13. United modification of Al-24Si alloy by Al-P and Al-Ti-C master alloys

    Institute of Scientific and Technical Information of China (English)

    韩延峰; 刘相法; 王海梅; 王振卿; 边秀房; 张均艳

    2003-01-01

    The modification effect of a new type of Al-P master alloy on Al-24Si alloys was investigated. It is foundthat excellent modification effect can be obtained by the addition of this new type of A1-P master alloy into Al-24Simelt and the average primary Si grain size is decreased below 47 μm from original 225 μm. It is also found that theTiC particles in the melt coming from Al8Ti2C can improve the modification effect of the Al-P master alloy. Whenthe content of TiC particles in the Al-24Si melt is 0.03 %, the improvement reaches the maximum and keeps steadywith increasing content of TiC particles. Modification effect occurs at 50 min after the addition of the Al-P master al-loy and TiC particles, and keeps stable with prolonging holding time.

  14. Reply to Pachai et al.

    Science.gov (United States)

    Harrison, William J; Bex, Peter J

    2016-05-01

    Peripheral vision is fundamentally limited by the spacing between objects. When asked to report a target's identity, observers make erroneous reports that sometimes match the identity of a nearby distractor and sometimes match a combination of target and distractor features. The classification of these errors has previously been used to support competing 'substitution' [1] or 'averaging' [2] models of the phenomenon known as 'visual crowding'. We recently proposed a single model in which both classes of error occur because observers make their reports by sampling from a biologically-plausible population of weighted responses within a region of space around the target [3]. It is critical to note that there is no probabilistic substitution or averaging process in our model; instead, we argue that neither substitution nor averaging occur, but that these are misclassifications of the distribution of reports that emerge when a population response distribution is sampled. This is a fundamentally different way of thinking about crowding, and on this basis we claim to have provided a mechanism unifying categorically distinct perceptual errors. Our goal was not to model all crowding phenomena, such as the release from crowding when target and flanks differ in color or depth [4]. Pachai et al.[5] have suggested that our model is not unifying because it inaccurately predicts perceptual performance for a particular stimulus. Although we agree that our model does not predict their data, this specific demonstration overlooks the critical aspect of the model: perceptual reports are drawn from a weighted population code. We show that Pachai et al.'s [5] own data actually provide evidence for the population code we have described [3], and we suggest a biologically-plausible analysis of their stimuli that provides a computational basis for their 'grouping' account of crowding.

  15. Kurzwortbildungen als Merkmal der Deutschenrechtssprache

    Directory of Open Access Journals (Sweden)

    Ljubica Kordić

    2013-12-01

    Full Text Available In deutscher Rechtssprache kommen häufig die Nominalkomposita vor, die auf eineim Vergleich mit der Gemeinsprache ungewöhnliche Weise gebildet werden. Diese Wortbildungsform wird in deutschen Grammatiken unterschiedlich bestimmt: als Reduktion, Kurzwortbildung, Kontraktion bzw. Klammerform. Dieser Wortbildungstypkann mit dem Kompositum Mietblock illustriert werden, das durch Verkürzung aus Miet(wohnungsblock entstanden ist. Im Kroatischen, wo Komposition als Wortbildungstyp relativ schwach vertreten ist, ist die Bildung solcher Komposita theoretisch nur angedeutet. Da die Komposita dieses Bildungstyps in deutschen Rechtstexten stark vertreten sind, ist das Ziel dieses Beitrags, auf ihre Gebräuchlichkeit als ein für deutsche Rechtstexte charakteristisches Merkmal hinzuweisen. In der Einleitung befasstsich die Autorin mit der Begriffsbestimmung, der theoretischen Determinierung undder Abgrenzung dieser Kompositionsart von anderen Sonderfällen. Den Hauptteil der Arbeit bildet die Untersuchung der Kurzwortbildungen (Klammerformen, Reduktionen, Verschmelzungen, die dem geltenden deutschen Strafgesetzbuch von 2009 entnommensind, und ihrer kroatischen Entsprechungen. Der Beitrag hat die Aufgabe, auf Grund der gesammelten Belege die Häufigkeit und die Bildungsmuster der Komposita dieses Typs in deutscher Rechtssprache zu bestimmen und durch semantische Transformationsmuster ihren Informationswert in Bezug auf die Konstituenten festzustellen, aus denen sie gebildet wurden. Es wird auch untersucht, welche Bildungstypen ihrekroatischen Äquivalente aufweisen und ob es irgendwelche Unterschiede in ihrem informativen Wert gibt. Die Autorin bedient sich der Methode der Datensammlung, der qualitativen semantischen Analyse der Belege nach den Transformationsmodellen von Fleischer und Barz und der Synthese der Resultate. Die Resultate dieser Untersuchung sollten einen Beitrag zur Erforschung der der Rechtslinguistik im allgemeinen leisten, inbesondere im

  16. Gettysburg: Monumento al mundo libre

    Directory of Open Access Journals (Sweden)

    Neutra, Richard J.

    1961-12-01

    Full Text Available En el verano del año 1958 fui invitado, por las autoridades de la Universidad de Arizona, en Tucson, a la colocación de la primera piedra de su futuro taller, construido para favorecer el desarrollo técnico del Estado. Varios alcaldes y ministros presenciaron la ceremonia, que fue muy interesante, y uno de los periodistas presentes, John Riddick, del "Tucson Daily Citizen", invitó cordialmente, a mi esposa y a mí, a atravesar, al día siguiente, la frontera mejicana, que cruzaba un vasto desierto.

  17. Personalidad y tolerancia al dolor

    OpenAIRE

    JESÚS M.ª CARRILLO; SUSANA COLLADO; NIEVES ROJO

    2005-01-01

    Se examina la relación de algunas variables de personalidad -EPQ-A (Eysenck y Eysenck, 1975), NEO-PI (McCrae y Costa, 1988) y STA -personalidad esquizotípica- y STB -personalidad límite-, de Claridge y Broks (1984), con la tolerancia al dolor experimental inducido mediante agua fría (cold pressor test), según el procedimiento de Staats, Heckmat y Staats (1998) en una muestra filtrada mediante un cuestionario sobre dolor crónico, dolores de cabeza, de espalda, artritis, síndrome de Raynaud, y ...

  18. La heredad junto al llanto

    Directory of Open Access Journals (Sweden)

    Javier Arias Ramírez

    1962-11-01

    Full Text Available En "La heredad junto al llanto", Carlos Palacio La verde canta todo lo elemental y simple con sobriedad y elegancia que dan mérito a su poesía. Por eso consideramos un acierto de sus editores el divulgar la obra de este joven poeta, que como dice en su introducción René Uribe Ferrer, no es conocido porque ha rehuido casi sistemáticamente la publicidad, lo cual me asegura que en este proceder hay una grande honestidad intelectual, una verdadera personalidad poética.

  19. CULTURAS DE AL-ANDALUS

    National Research Council Canada - National Science Library

    Gracia López Anguita

    2016-01-01

    ... el mundo árabo-islámico en sus diversas manifestaciones sociales, científicas, políticas o artísticas, con especial atención al ámbito andalusí. El alto nivel científico del que ha gozado desde un principio esta colección queda avalado por la incorporación, en este número, de un comité científico y un comité asesor, ajustándose, así, a lo...

  20. Alí Caro, alarife

    OpenAIRE

    2009-01-01

    Quizá el más sobresaliente sea el de Alí Caro, un alarife que a finales del siglo xv proyectó y dirigió la construcción del castillo de Coca, la obra más insigne de la arquitectura militar mudéjar del siglo xv castellano. Efectivamente, encontramos que hacia 1486 fue reclamado por don Alonso FonsecaAvellaneda, señor de las villas de Coca y Alaejos, para levantar un impresionante castillo -que, a la vez, cumpliría las funciones de palacio nobiliar- en Coca, con la ayuda de sus hermanos Yuc;...

  1. Gender als Kategorie historischer Bildungsforschung

    Directory of Open Access Journals (Sweden)

    Silvy Chakkalakal

    2008-03-01

    Full Text Available Die Beiträge der Festschrift für Juliane Jacobi befassen sich mit „Geschlecht, Religion und Pädagogik“ als Kategorien der historischen Bildungsforschung. Die Mehrzahl der Autorinnen des Sammelbandes richtet dabei den Blick insbesondere auf die Frage nach dem Einfluss von „Gender“ auf die Bildungsgeschichte der Moderne. Der durch die breite Fragestellung entstehenden Heterogenität der Beiträge wirken die Herausgeberinnen durch eine thematische Gliederung in vier Teilbereiche entgegen: Kindheit und Jugend, Religion und Geschlechteranthropologie, Frauenbewegung und pädagogische Berufe sowie Geselligkeitsformen.

  2. A melancolia em Al Berto

    OpenAIRE

    Camila Emanuele Martins de Souza

    2015-01-01

    Este trabalho objetiva estudar, sob a perspectiva da melancolia, os livros Salsugem (1984) e Horto de Incêndio (1997), de Al Berto. O autor português produz escritos em que a temática da melancolia atravessa a palavra, o que justifica o debruçar-se sobre as construções textuais da poética albertiana, a fim de traçar-lhe novas possibilidades de leitura por esse ângulo. Para isso, com o intuito de compreender o discurso melancólico segue-se o embasamento teórico: de Klibansky, Panosfsky e Saxl ...

  3. Al-Ḥaqīqah al-Muwāfaqah li al-Sharī‘ah: al-Taṣāluḥ bayn al-Taṣawuf wa al-Sharī‘ah bi Nusantara fi al-Qarn al-Sādis ‘Ashr al-Mīlādī

    Directory of Open Access Journals (Sweden)

    Iin Suryaningsih

    2013-04-01

    Full Text Available This article discusses the reinterpretation of waḥdat al-wujūd doctrine among Muslims of the archipelago, using the sharī‘ah approach in Sufism as suggested by Al-Būrhanpūrī (d.1620 in his work al-Haqīqah al-Muwāfaqah li al-Sharī‘ah. This work is one of the commentaries (sharḥ from al-Tuḥfah al-Mursalah ila rūḥ al-Nabī SAW, that invited much debate among Muslims of the archipelago. Al-Būrhanpūrī’s detailed interpretation of waḥdat al-wujūd doctrine proved that the essence of the concept did not contradict the basic principles of Islam as contained in the Quran and Hadith. Al-Būrhanpūrī  interpreted the concept through explanations that adjusted to the audience’s competence, utilizing oral language carefully in revealing spiritual experience not easily explained, as well as employing the bases of sharī‘ah. Al-Haqīqah al-Muwāfaqah has provided the information about the explanations of interpretation tradition among the archipelago sufis.Copyright (c 2014 by SDI. All right reserved.DOI: 10.15408/sdi.v20i1.350 

  4. Ti_3AlC_2-Al_2O_3-TiAl_3 composite fabricated by reactive melt infiltration

    Institute of Scientific and Technical Information of China (English)

    HE Shan-shan; YIN Xiao-wei; ZHANG Li-tong; LI Xiang-ming; CHENG Lai-fei

    2009-01-01

    Porous preforms were fabricated by cold-pressing process using powder mixture of TiC, TiO_2 and dextrin. After pyrolysis and sintering, Al melt was infiltrated into the porous preforms, leading to the formation of Ti_3AlC_2-Al_2O_3-TiAl_3 composite. Effects of cold-pressing pressure of preforms on microstructures and mechanical properties of the composites were studied. Synthesis mechanism and toughening mechanism of composite were also analyzed. The results shows that TiO_2 is reduced into Ti_2O_3 by carbon, the decomposition product of dextrin, which causes the spontaneous infiltration of Al melt into TiC/Ti_2O_3 preform. Then, Ti_3AlC_2-Al_2O_3-TiAl_3 composite is in-situ formed from the simultaneous reaction of Al melt with TiC and Ti_2O_3. With the increase of cold-pressing pressure from 10 MPa to 40 MPa, the pore size distribution of the preforms becomes increasingly uniform after pre-sintering, which results in the reduction of defects, and the decrease of property discrepancy of composites. Nano-laminated Ti_3AlC_2 grains and Al_2O_3 particles make the fracture toughness of TiAl_3 increase remarkably by various toughening mechanisms including stress-induced microcrack, crack deflection and crack bridging.

  5. Ce对Al-Si-Cu合金中α(Al)-Al2Cu共晶形貌的影响%Effect of Ce on morphology ofα(Al)-Al2Cu eutectic in Al-Si-Cu alloy

    Institute of Scientific and Technical Information of China (English)

    Maja VONINA; Joef MEDVED; Tonica BONINA; Franc ZUPANI

    2014-01-01

    The effect of Ce addition on the morphology of the α(Al)-Al2Cu eutectic in Al-Si-Cu alloy was investigated using thermal analysis, light microscopy, scanning electron microscopy, focused ion beam and energy dispersive analysis. The results show that the eutectic α(Al)-Al2Cu forms within small space between dendrites, silicon and AlSiFeMn plates. Eutectic Al2Cu is not lamellar but degenerated. However, Al2Cu in Ce-modified alloys is more compact. Ce partially dissolves in Al2Cu, which is a viable reason for the formation of coarser Al2Cu. The addition of Ce also increases the microhardness of theα(Al)-Al2Cu eutectic by almost 10%compared with the basic Al-Si-Cu alloy.%采用热分析、光学显微镜技术、扫描电镜技术、聚焦离子束和能量色散谱分析方法研究Ce对Al-Si-Cu合金中α(Al)-Al2Cu共晶形貌的影响。结果表明,在枝晶、硅和AlSiFeMn之间较小空间内形成了α(Al)-Al2Cu共晶。Al2Cu为非层状的不规则共晶组织。Al2Cu在经Ce改性的合金中更加致密。部分Ce溶解于Al2Cu中,这是粗晶Al2Cu形成的原因。与基体Al-Si-Cu合金相比,Ce的加入能使α(Al)-Al2Cu共晶合金的显微硬度提高约10%。

  6. Betaalde arbeid als verdringer van vrijwilligerswerk? Overbelasting als mogelijke verklaring

    Directory of Open Access Journals (Sweden)

    Angela Kok-Van Meer

    2014-06-01

    Full Text Available Do paid work activities displace volunteering? A potential explanation from role overload theoryRecent changes in Dutch society might lead to a shortage of volunteers. On the one hand, the demand for volunteers is increasing: in the social welfare domain because of governmental austerity policies and in other domains such as sports because of the higher supervision intensity of activities. On the other hand, the supply of volunteers is likely to decrease as more and more women and older workers are active in the labor market, which reduces the time that is available for volunteering. Role overload theory would suggest that the increasing labor participation rate of certain categories of workers goes along with a decline of participation in voluntary work. The secondary data analysis shows that various role loads (work, care for children living at home are associated with differences in participation in voluntary work. However, while a higher number of contractual work hours and hours spent on work-related training are negatively associated with volunteer work, care for children living at home is positively associated with volunteering. These results provide only limited support for role overload theory.Betaalde arbeid als verdringer van vrijwilligerswerk? Overbelasting als mogelijke verklaringDe afgelopen jaren hebben zich enkele maatschappelijke veranderingen voorgedaan, die wellicht tot schaarste op de Nederlandse vrijwilligersmarkt zouden kunnen leiden. Enerzijds neemt de vraag naar vrijwilligers toe doordat subsidieregelingen versoberen (bijvoorbeeld in zorg en welzijn en de begeleidingsintensiteit in bepaalde organisaties stijgt (bijvoorbeeld in sport. Anderzijds neemt het aanbod van vrijwilligers af doordat vrouwen en ouderen meer en langer op de arbeidsmarkt actief zijn, waardoor minder tijd beschikbaar is voor vrijwilligerswerk. In dit artikel wordt aan de hand van de role overload theorie nagegaan of het al dan niet deelnemen aan

  7. con bajo peso al nacer

    Directory of Open Access Journals (Sweden)

    Adriana Mora Antó

    2005-01-01

    Full Text Available Esta investigación dio cuenta de la relación entre el estilo de funcionamiento familiar, los patrones de crianza y las edades de desarrollo evolutivo en niños, nacidos con bajo peso. El estudio descriptivo correlacional se realizó con 41 niños y sus madres, aplicándose cuestionarios sobre funcionamiento familiar, prácticas de crianza y desarrollo infantil. Los resultados señalaron la existencia de un funcionamiento familiar caracterizado por una cohesión amalgamada y una adaptabilidad caótica, una disciplina complaciente, falta de control y de límites claros en la díada madre-hijo. Se trataba de familias monoparentales, donde la temprana edad de concepción, el madresolterismo y el apoyo de la familia extensa eran constantes. Las edades evolutivas registradas indicaron un desarrollo inferior a la edad cronológica, en la mayor parte de los casos; sin embargo, éstas tendieron a ser superiores al compararlas con la edades reales de los infantes. No se encontró una correlación estadísticamente significativa entre la edad de desarrollo y los diferentes factores del funcionamiento familiar para algunos de los rangos de edad considerados; sin embargo, no se lo descartó por completo, especialmente en lo referente al optimismo familiar

  8. Factores de riesgo asociados con asma alérgica en niños de 4 a 16 años de Santa Marta, Colombia

    Directory of Open Access Journals (Sweden)

    Luis Del Castillo Castilla

    2013-10-01

    Full Text Available ResumenEl asma es una enfermedad pediátrica ampliamente distribuida en el mundo. En la actualidad hay más de 130 millones de personas asmáticas y las proyecciones en salud indican que este número irá en aumento. En Colombia la morbilidad y mortalidad por asma es elevada, a pesar de esto en Santa Marta se desconoce la prevalencia de asma y los factores de riesgo. Con el propósito de determinar los factores de riesgo ambiental y poblacional asociados con el asma alérgica en niños de 4 a 16 años de Santa Marta, se realizó un estudio descriptivo transversal. Los factores de riesgo y la severidad del asma se establecieron mediante un cuestionario estandarizado. El diagnóstico clínico de asma fue confirmado por espirometría. De un total de 227 niños estudiados, 97 presentaron uno o más episodios de sibilancias o estridor recurrente en los últimos 12 meses, 55 fueron confirmados por espirometría. Se encontró asociación significativa entre la sintomatología de asma, la exposición al polvo casero, el humo del cigarillo, la herencia y el parasitismo intestinal. Ninguna asociación estadística se encontró entre el asma y la desnutrición aguda o crónica. Estos resultados confirman la importancia de los alergenos intradomiciliarios en la sintomatología de asma en el Caribe Colombiano. (Duazary 2008; 1: 9 - 14AbstractAsthma is a pediatric disease widely distributed in the world. At the present time there are more than 130 million asthmatics people and the projections in health indicate that this number wrath in increase. In Colombia the morbidity and mortality of asthma are elevated, in spite of this in Santa Marta the asthma prevalence and risk factors is not known. In order to determine what are the environmental and population risk factors associated with the allergic asthma in children of 4 to 16 years from Santa Marta, a trasversal descriptive study was done. The risk factors and asthma severity were determined by means of a

  9. Formaline of alternatieven als ontsmettingsmiddel voor broedeieren

    NARCIS (Netherlands)

    Meijerhof, R.; Dijk, D.

    1997-01-01

    Formaline wordt algemeen gezien als een goed middel om broedeieren te ontsmetten. Toch geeft ontsmetting met middelen als ozon en waterstofperoxyde vaak een iets beter broedresultaat. Een eventuele verklaring hiervoor is momenteel nog niet te geven.

  10. Grainreifnementlimit of commercialpureAl inoculatedbyAl-Ti-C(B)masteralloys

    Institute of Scientific and Technical Information of China (English)

    En-zhao Wang; Xiang-fa Liu

    2015-01-01

    The grain reifnement limits of commercial pure Al inoculated by Al-5Ti-1B, Al-5Ti-0.25C and Al-5Ti-0.3C-0.2B master al oys were studied, and the inlfuence of melting temperature on the grain reifning performance of these three master al oys was investigated using a high scope video microscope (HSVM), a ifeld-emission scanning electron microscope (FESEM), an electron probe micro-analyzer (EPMA) and X–ray diffraction (XRD) method. Results show that there is a grain reifnement limit of commercial pure Al reifned by these three master al oys; with the same addition level of 1.5% under the present experimental conditions, the grain reifnement limits (smal est average grain size) of commercial pure Al reifned by Al-5Ti-1B, Al-5Ti-0.25C and Al-5Ti-0.3C-0.2B master al oys are 50 µm, 80 µm and 80 µm, respectively. In addition, with an increase in the melting temperature of the pure Al, the grain reifning performance of Al-5Ti-1B and Al-5Ti-0.25C master al oys decreases, but the grain reifning performance of Al-5Ti-0.3C-0.2B changes little.

  11. Rekonstruksi Konsep Ijtihad: Studi Pemikiran Ben’umar tentang al-Ijtihad fi al-Waqi’

    Directory of Open Access Journals (Sweden)

    Duski Ibrahim

    2015-10-01

    Full Text Available This paper is the result of a research that evaluating the reconstruction the concept of ijtihad, by discuss the idea of al-Ijtihad Ben'umar fi al-waqi’. This paper concludes that Al-Ijtihad fi al-waqi’ is actually a form of collective ijtihad (al ijtihad al-jama'i, by gathering the experts of shari'ah law (fuqaha` ash-shar'i and experts Researchers and scientists (khubara` al-'ashr. Because experts know the nash purposes, while researchers and scientists (al-khubara` know the reality (al-waqi’, the effects in the future (ma'alat = future effect and challenges (tahaddiyat. The idea of formulating the concept of al-ijtihad fi al-waqi’ emerged based on a premise that ijtihad is a creation of experts to implement Islamic law in society. Therefore, the concept of ijtihad experienced a significant development, start from using the nash from the language aspects, continue to the using of logic. At the moment when the situation people are increasingly develop, then the creation of ijtihad become a necessary to developed, for example in the form of al-ijtihad fi al-waqi’ . About the source of the formation of the concept of al -ijtihad fi al-waqi’ comes from theory about the functions of nash, al-manath theory in Islamic law, and supported by the theory of al-mashlalah al-mursalah.

  12. Cenomanian-Turonian biostratigraphy of the Jardas Al Abid area, Al Jabal Al Akhdar, northeast Libya

    Science.gov (United States)

    El Qot, Gamal M.; Abdulsamad, Esam O.

    2016-09-01

    The Upper Cenomanian-Turonian succession exposed at Jardas al'Abid area consists mainly of carbonates with siliciclastic intercalations. This succession is subdivided lithostratigraphically into: Qasr al'Abid (Late Cenomanian) and Al Baniyah (Late Cenomanian-Coniacian) formations. This sequence is relatively rich in macrofossil assemblages especially bivalves, gastropods, and echinoids with rare ammonites. Based on the first occurrence (FO) and last occurrence (LO) of some index species of these macrofossil groups, an integrated biostratigraphic framework has been constructed. The studied Cenomanian-Turonian sequence is subdivided biostratigraphically into three ammonite biozones; Pseudaspidoceras pseudonodosoides Total Range Zone, Choffaticeras segne Total Range Zone, and Coilopoceras requienianum Total Range Zone. Based on the rest of macrofossil assemblages other than the ammonites, eight biozones were recognized; Mecaster batnensis Total Range Zone, Ceratostreon flabellatum-Neithea dutrugei Acme Zone, Costagyra olisiponensis Acme Zone, Pycnodonte (Phygraea) vesicularis vesiculosa Acme Zone, Mytiloides labiatus Total Range Zone = Mecaster turonensis Acme Zone, Rachiosoma rectilineatum-Curvostrea rouvillei-Tylostoma (T.) globosum Assemblage Zone, Radiolites sp.-Apricardia? matheroni Total Range Zone, and Nerinea requieniana Total Range Zone. Most of the proposed biozones are recorded for the first time from Libya. The integration among these biozones as well as local and inter-regional correlation of the biozones have been discussed. The stage boundaries of the studied stratigraphic intervals are discussed, where the Cenomanian/Turonian boundary is delineated at the last occurrence (LO) of Pseudaspidoceras pseudonodosoides (Choffat), while the Turonian/Coniacian boundary is delineated arbitrary being agree with the LO of the Turonian fauna.

  13. Aluminium distribution in ZSM-5 revisited: The role of Al-Al interactions

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz-Salvador, A. Rabdel, E-mail: rabdel@imre.oc.uh.cu [Group of Materials Developed by Design, Division of Chemistry and Technology of Materials, Institute of Materials Science and Engineering (IMRE), University of Havana, Havana 10400 (Cuba); Grau-Crespo, Ricardo; Gray, Aileen E.; Lewis, Dewi W. [Department of Chemistry, University College London, 20 Gordon Street, London, WC1H OAJ (United Kingdom)

    2013-02-15

    We present a theoretical study of the distribution of Al atoms in zeolite ZSM-5 with Si/Al=47, where we focus on the role of Al-Al interactions rather than on the energetics of Al/Si substitutions at individual sites. Using interatomic potential methods, we evaluate the energies of the full set of symmetrically independent configurations of Al siting in a Si{sub 94}Al{sub 2}O{sub 192} cell. The equilibrium Al distribution is determined by the interplay of two factors: the energetics of the Al/Si substitution at an individual site, which tends to populate particular T sites (e.g., the T14 site), and the Al-Al interaction, which at this Si/Al maximises Al-Al distances in general agreement with Dempsey's rule. However, it is found that the interaction energy changes approximately as the inverse of the square of the distance between the two Al atoms, rather than the inverse of the distance expected if this were merely charge repulsion. Moreover, we find that the anisotropic nature of the framework density plays an important role in determining the magnitude of the interactions, which are not simply dependent on Al-Al distances. - Graphical abstract: Role of Al-Al interactions in high silica ZSM-5 is shown to be anisotropic in nature and not dependent solely on Coulombic interactions. Highlights: Black-Right-Pointing-Pointer Si-Al distribution in ZSM-5 is revisited, stressing the role of the Al-Al interaction. Black-Right-Pointing-Pointer Coulomb interactions are not the key factors controlling the Al siting. Black-Right-Pointing-Pointer Anisotropy of the framework is identified as a source of departure from Dempsey's rule.

  14. Lijden of woede? Maria als machtige bemiddelares

    NARCIS (Netherlands)

    Derks, S.W.

    2007-01-01

    In Bolivia wordt Maria gezien als een vrouw die zowel goed als kwaad kan doen. Boliviaanse vrouwen benaderen Maria vooral om hun woede over te dragen. Genderanalyse van het marianismo in Latijns-Amerika gaat daarentegen uit van het beeld van Maria als passieve en onderdanige vrouw, door wie vrouwen

  15. Framework Al zoning in zeolite ECR-1.

    Science.gov (United States)

    Shin, Jiho; Ahn, Nak Ho; Cho, Sung June; Ren, Limin; Xiao, Feng-Shou; Hong, Suk Bong

    2014-02-25

    Rietveld analyses of the synchrotron X-ray diffraction data for various cation forms of zeolite ECR-1 have demonstrated framework Al zoning, which parallels the alternation of Al-rich maz and Al-poor mor layers. This can be further supported by notable differences in the average bond valence of its 10 crystallographically distinct tetrahedral sites.

  16. Electroplating Zn-Al Alloy Technology

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The method of controlling separating anode and separating power source was used to perform orthogonal optimization for the parameters in electroplating Zn-Al alloy.The electroplating Zn-Al alloy technology was decided, in which the content of Al is about 12%-15%.

  17. Transport Properties of the Tunnel Junctions Al1-xCox/{Al1-xCox-oxide}/Al

    Institute of Scientific and Technical Information of China (English)

    X.F.Han; J. Murai; H.Kubota; Y.Ando; Q.Y.Wang; N.Tezuka; T.Miyazaki

    2000-01-01

    The oxides of Al1-xCox (x=0,0.25,0.5,0.75, and 1.0) alloys were chosen as barrier materials in this work. The tunnel junction consists of the bottom electrode Al1-xCox and the top electrode Al with an insulating layer { Al1-xCox-oxide} which was formed by natural oxidation in a baking-box at 333K. The oxidation time for forming an Al1-xCox-oxide layer on the surface of the bottom Al1-xCox layers were optimized.The resistance of Al1-xCox/{ Al1-xCox-oxide}/Al tunnel junctions varied between 101 and 106 Ω measured at 1 my and 4.2 K. The effective barrier height and width of insulating layers Al1-xCox-oxide ( x=0.25, 0.5, and 0.75 )varied between 0.6 and 2.7 eV and between 1.3 and 2.1 nm. It is shown that the thin oxide layer of Al1-xCox alloys can be chosen as barrier materials.

  18. Oxidation protection of NiCoCrAlY coatings on γ-TiAl

    Institute of Scientific and Technical Information of China (English)

    WANG Qi-min; GUO Ming-hu; KE Pei-ling; GONG Jun; SUN Chao; WEN Li-shi

    2005-01-01

    The effect of NiCoCrAlY overlay coatings on the oxidation resistance of γ-TiAl was studied at 900 ℃ in static air. To hinder the interdiffusion of the elements, the Al/Al2O3 layer was added between the coating and the alloy. The results show that the TiAl alloy exhibits poor oxidation resistance. NiCoCrAlY coating can not effectively protect the γ-TiAl substrate from high temperature oxidation because of the serious interdiffusion between the coating and the substrates. With Al/Al2O3 diffusion barrier, the NiCoCrAlY coating exhibits excellent oxidation protection on γ-TiAl alloy.

  19. Entscheidung als Häresie

    Directory of Open Access Journals (Sweden)

    Jaanus Sooväli

    2014-06-01

    Full Text Available Man könnte sagen, dass Aristoteles so etwas wie eine traditionelle und dominierende Auffassung der Entscheidung in der westlichen Philosophie gründet. Das Ziel dieses Aufsatzes ist es, diese Auffassung von Aristoteles zu entwerfen, einige ihrer wichtigsten Probleme anzusprechen, und sie damit zu kontrastieren, was ich Jacques Derridas häretische „Konzeptualisierung“ der Entscheidung nennen würde. Es wird gezeigt, dass diese häretische Thematisierung von Derrida nicht nur und einfach mit dem traditionellen aristotelischen Begriff bricht, sondern vielmehr auch zu Recht einige seiner wichtigsten Züge auf solcher Weise schärft, dass von diesem radikalisierten Standpunkt die Behandlung von Aristoteles als die Annullierung der Entscheidung zum Vorschein kommt. Es wird zudem impliziert, wie Derridas häretische Auffassung die Erneuerung der Ethik und Politik mit sich bringt.

  20. Instandhaltungsmanagement als Gestaltungsfeld Ganzheitlicher Produktionssysteme

    Science.gov (United States)

    Dombrowski, Uwe; Schulze, Sven; Otano, Isabel Crespo

    Sich kontinuierlich verändernde Rahmenbedingungen, wie beispielsweise eine steigende Variantenvielfalt, verkürzte Produktlebenszyklen sowie Kundenforderungen nach höherer Qualität, kürzeren Lieferzeiten und geringeren Kosten, fordern von produzierenden Unternehmen eine stetige Anpassung der Prozesse, der Organisation und der Strukturen. Seit den 90er Jahren versuchen immer mehr deutsche Unternehmen diesen veränderten Anforderungen mit der Einführung eines Ganzheitlichen Produktionssystems (GPS) zu begegnen. Ganzheitliche Produktionssysteme sind dabei in ihren Grundlagen an das Toyota Produktionssystem angelehnt, vereinigen aber auch weitere Methoden zu einem unternehmensspezifischen Regelwerk. Im Rahmen des langfristigen Trends zu unternehmensindividuellen Produktionssystemen wird sowohl in der Industrie als auch in der Forschung intensiv über das Toyota Produktionssystem, Lean Production, Lean Management und Ganzheitliche Produktionssysteme diskutiert, werden Konzepte zu Implementierung und Betrieb erstellt und die Wirtschaftlichkeit untersucht.

  1. Trato verbal paterno al adolescente

    Directory of Open Access Journals (Sweden)

    Rodríguez Juan Carlos

    1995-06-01

    Full Text Available

    En alguna ocasión se ha escuchado una palabra, que causa un sentimiento y a la vez un recuerdo, que lleva a evocar la adolescencia o la infancia, se recuerda quien la pronunciaba y en que ocasión la decía. Este es el poder que tiene una palabra y más aún si es dicha por el padre, puesto que este es la figura significativa que se lleva en la memoria. De aquí nace el interés de realizar un estudio, en donde se describe y analice la percepción y el sentimiento del adolescente, quien en esta etapa es vulnerable al cambio, ya que está buscando su propia identidad; que con el trato verbal paterno la encontrara sin ninguna dificultad o por el contrario nunca la encontrará.

     

  2. Die Valenz als textgrammatische Kategorie

    Directory of Open Access Journals (Sweden)

    Stojan Bračič

    1994-12-01

    Full Text Available Vor mehr als dreißig Jahren kam der französische Linguist Lucien Tesnière auf die geniale Idee, die gegenseitigen Relationen zwischen dem Verb eines Satzes einerseits und den anderen Satzteilen andererseits mit den chemischen Relationen in der Struktur eines Moleküls zu vergleichen. Die Eigenschaft des Verbs, andere Wörter an sich zu binden, nannte er Verbvalenz. Tesnière schreibt (schon 1959 wörtlich: "Man kann das Verb mit einem Atom vergleichen, an dem Häkchen angebracht sind, so daß es -je nach der Anzahl der Häkchen - eine wechselnde Zahl von Aktanten an sich ziehen und in Abhängigkeit halten kann. Die Anzahl der Häkchen, die ein Verb aufweist, und dementsprechend die Zahl der Aktanten, die es regieren kann, ergibt das, was man die Valenz des Verbs nennt" (Tesnière 1980: 161. Und weiter: "Aufgrund der strukturalen Konnexionen bestehen Dependenzbeziehungen (Abhängigkeitsbeziehungen zwischen den Wörtem. Jede Konnexion verbindet im Prinzip einen übergeordneten mit einem untergeordneten Term" (ibid., 27. Schematisch hat Tesnière diese Relationen bekannt­ lich in den sogenannten Stemmata (Strukturbaumen, graphischen Darstellungen von Konnexionsstrukturen; ibid., 384 wiedergegeben. Im Satz "Mon vieil ami chante cette chanson fort jolie" ist das Verb "chante" als "régissant" allen anderen Wortkonstituenten iibergeordnet, wobei die üntergeordneten Elemente "ami" und "chanson" in einer zweiten Rangstufe wiederum den untergeordneten Elementen "mon", "vieil", "cette", "jolie" übergeordnet sind. (Vgl. Greule 1982: 99.

  3. Preparation and Characterization of Highly Flexible Al2O3/Al/Al2O3 Hybrid Composite

    Directory of Open Access Journals (Sweden)

    Zhijiang Wang

    2015-01-01

    Full Text Available The natural brittleness of oxide ceramics heavily inhibits their more extensive applications. In present research, a highly flexible Al2O3/Al/Al2O3 hybrid composite was fabricated by employing plasma electrolysis oxidation to in situ grow alumina layers on Al foil, in which an outside layer of nanostructured polycrystalline oxide ceramic was composed of nanosized grains with the size of around 17 nm. Due to shear band formation, nanosized circle bubbles prolonging the crack path, grain rotation, and deformation, the fabricated Al2O3/Al/Al2O3 hybrid composite contains no observable cracks even after being bent on a cylindrical bar with a curvature of 1.5 mm. The composite exhibits alumina stiffness at the elastic stage and aluminum ductility during plastic deformation, which provides high flexibility with the well-integrated properties of the components. In a synergistic interaction, the alumina on the outside exhibited a strain of 0.33% at room temperature, which was higher than optimum value of 0.25% presented by reported most flexible oxide ceramics. With the unique characteristics and properties, the Al2O3/Al/Al2O3 composite demonstrates a great potential for various engineering applications.

  4. Al-Fe-Si、Al-Mn-Si与Al-Fe-Mn-Si体系热力学描述的更新%Update of Al-Fe-Si, Al-Mn-Si and Al-Fe-Mn-Si thermodynamic descriptions

    Institute of Scientific and Technical Information of China (English)

    陈海林; 陈清; 杜勇; Johan BRATBERG; Anders ENGSTR(O)M

    2014-01-01

    采用Calphad方法对Al-Fe-Mn-Si四元系及其子体系进行热力学评估.首先,通过考虑文献中最新的实验研究结果以及对部分三元化合物应用新的热力学模型,修正Al-Fe-Si三系的热力学描述,显著地改善了整个成分范围内、尤其是富Al角的液相面投影图.随后,对三元化合物α-AlMnSi和β-AlMnSi采用新的模型,精修Al-Mn-Si体系富Al角的热力学描述.然后,通过模拟α-AlMnSi相在Al-Fe-Mn-Si体系中的固溶度,优化Al-Fe-Mn-Si四元系富Al角的热力学描述.在优化时,对α-AlMnSi作特殊考虑并加入限制条件,以确保其不会在Al-Fe-Si三元系中变得稳定.最后,将所获得的热力学描述加入TCAL数据库,通过一系列的相平衡计算与凝固模拟、以及与商业铝合金的实验数据的比较,对所获得的热力学描述进行全面的验证.更新后的TCAL数据库能够可靠地预测Al-Fe-Si基与Al-Fe-Mn-Si基合金中的相形成.

  5. Friction Stir Welding of Al 5052 with Al 6061 Alloys

    Directory of Open Access Journals (Sweden)

    N. T. Kumbhar

    2012-01-01

    Full Text Available Friction stir welding (FSW, a solid-state joining technique, is being extensively used in similar as well as dissimilar joining of Al, Mg, Cu, Ti, and their alloys. In the present study, friction stir welding of two aluminium alloys—AA6061 and AA5052—was carried out at various combinations of tool rotation speeds and tool traverse speeds. The transverse cross-section of the weld was used for optical as well as electron microscopy observations. The microstructural studies were used to get an indication of the extent of material mixing both at the macro- and microscales. It was observed that, at the interface region, both materials exhibited similar texture despite the nonrigorous mixing of the materials in the nugget. The extent of interdiffusion of alloying elements at the interface was studied using electron probe microanalysis. The tensile testing evaluation of these specimens showed good mechanical properties. The interdiffusion of alloying elements and development of similar orientations in the nugget could have contributed to the better tensile properties of the friction-stir-welded AA5052-AA6061 specimens.

  6. Magnetism of Al-substituted magnetite reduced from Al-hematite

    Science.gov (United States)

    Jiang, Zhaoxia; Liu, Qingsong; Zhao, Xiang; Roberts, Andrew P.; Heslop, David; Barrón, Vidal; Torrent, José

    2016-06-01

    Aluminum-substituted magnetite (Al-magnetite) reduced from Al-substituted hematite or goethite (Al-hematite or Al-goethite) is an environmentally important constituent of magnetically enhanced soils. In order to characterize the magnetic properties of Al-magnetite, two series of Al-magnetite samples were synthesized through reduction of Al-hematite by a mixed gas (80% CO2 and 20% CO) at 395°C for 72 h in a quartz tube furnace. Al-magnetite samples inherited the morphology of their parent Al-hematite samples, but only those transformed from Al-hematite synthesized at low temperature possessed surficial micropores, which originated from the release of structural water during heating. Surface micropores could thus serve as a practical fingerprint of fire or other high-temperature mineralogical alteration processes in natural environments, e.g., shear friction in seismic zones. In addition, Al substitution greatly affects the magnetic properties of Al-magnetite. For example, coercivity (Bc) increases with increasing Al content and then decreases slightly, while the saturation magnetization (Ms), Curie temperature (Tc), and Verwey transition temperature (Tv) all decrease with increasing Al content due to crystal defect formation and dilution of magnetic ions caused by Al incorporation. Moreover, different trends in the correlation between Tc and Bc can be used to discriminate titanomagnetite from Al-magnetite, which is likely to be important in environmental and paleomagnetic studies, particularly in soil.

  7. Cryptanalysis of Lin et al.'s Efficient Block-Cipher-Based Hash Function

    NARCIS (Netherlands)

    Liu, Bozhong; Gong, Zheng; Chen, Xiaohong; Qiu, Weidong; Zheng, Dong

    2010-01-01

    Hash functions are widely used in authentication. In this paper, the security of Lin et al.'s efficient block-cipher-based hash function is reviewed. By using Joux's multicollisions and Kelsey et al.'s expandable message techniques, we find the scheme is vulnerable to collision, preimage and second

  8. Parasitismo de Meloidogyne enterolobii em espécies de myrtaceae

    Directory of Open Access Journals (Sweden)

    Luiza Suely Semen Martins

    2013-06-01

    Full Text Available A meloidoginose da goiabeira, causada por M. enterolobii (= M. mayaguensis, é hoje considerado o principal problema fitossanitário desta cultura em todo o País, pois sua incidência resulta em acentuada queda de produtividade e, na maioria das vezes, a morte das plantas em médio prazo. Visando a seu controle, objetivou-se neste trabalho identificar fontes de resistência em goiabeira Psidium guajava L e araçazeiro Psidium sp.. Foram avaliados onze genótipos oriundos do Câmpus da Universidade Federal de Lavras (UFLA e de regiões próximas ao município de Lavras (MG. As sementes foram coletadas de frutos fisiologicamente maduros e germinadas em piscinas hidropônicas. Ao atingirem 12 cm de altura, foram transferidas para casa de vegetação, em vasos individuais, e mantidas a temperatura entre 18-38°C. Após quinze dias, foram inoculados individualmente com suspensão de 10.000 ovos e juvenis de segundo estádio (J2 de M. enterolobii e avaliadas após 120 dias. As reações dos hospedeiros foram enquadradas nos parâmetros estabelecidos pelo fator de reprodução FR, estimado pelo quociente Pf/Pi, em que Pf representa a população final e Pi a população inicial. O delineamento utilizado foi o inteiramente casualizado, com 11 genótipos, uma espécie de nematoide e seis repetições, sendo duas plantas em cada genótipo adicionadas como controle. Quatro meses depois, foram avaliados os teores foliares de macro e micronutrientes e o grau de infecção de cada genótipo. A produção média de ovos e J2 de M. enterolobii variou de 200 a 428.146,1, e os fatores de reprodução (FR médios variaram de 0,02(ALU1 a 42,81(A-PASTO. Os genótipos de araçazeiro (Psidium spp. AUFLA1, AUFLA4, AUFLA5 e APASTO e os genótipos de goiabeira (P. guajava G-ROXA e G-AMAR foram considerados suscetíveis. Os genótipos de araçazeiro ALU1, ALU2, ALU3, AROXO-C e AROXO-U mostraram-se resistentes, reforçando a necessidade de trabalhos complementares com essas espécies para uso como porta-enxerto em cultivares comerciais de goiabeira. A absorção de macro e micronutrientes é alterada quando os genótipos de Psidium spp. são inoculados com o fitonematoide M. enterolobii.

  9. Parasitismo por Calodium hepaticum em dois cães Calodium hepaticum parasitism in two dogs

    Directory of Open Access Journals (Sweden)

    Heloísa Einloft Palma

    2009-12-01

    Full Text Available Calodium hepaticum já foi relatado parasitando o parênquima hepático de diversas espécies de mamíferos, porém é infrequente em cães. O presente artigo tem o objetivo de descrever dois casos de capilariose hepática em cães, diagnosticados em um período de um mês na região de Santa Maria, Rio Grande do Sul, Brasil. O primeiro cão apresentava sintomatologia clínica de insuficiência cardíaca, e ovos de Calodium hepaticum foram encontrados ocasionalmente no exame histopatológico do fígado. O segundo animal apresentava mucosas ictéricas e ascite. No hemograma, ficou evidente a presença de anemia arregenerativa e, na avaliação de bioquímica sérica, percebeu-se aumento de fosfatase alcalina, alanina aminotransferase e hipoalbuminemia. A análise do liquido cavitário foi compatível com transudato modificado. No exame histopatológico, foram observados numerosos ovos bioperculados de Calodium hepaticum, dispostos aleatoriamente pelo parênquima hepático, com reação granulomatosa e fibrosa adjacente aos ovos. A existência de maior número de cães infectados demonstra a necessidade de controle da população de roedores.Calodium hepaticum has been reported as a parasite of the hepatic parenchyma of many mammal species, but it is not frequent in dogs. The present article aimed to describe two cases of hepatic capillariasis in dogs, diagnosed in a period of one month, in e Santa Maria city, Rio Grande do Sul state, Brazil . The first dog presented clinical sintomathology of cardiac insufficiency and Calodium hepaticum eggs were occasionally found by histopathological examination of the liver. The second animal presented icteric mucous membranes and ascites. The hemogram revealed non-regenerative anaemia and in the biochemistry serum were observed elevation of alkaline phosphatase, alanina aminotransferase and hypoalbuminemia. The cavitary liquid analysis was compatible with modified transudate. In the histopathological examination, numerous bioperculated eggs of Calodium hepaticum were observed aleatorily distributed in the hepatic parenchyma, with granulomatous and fibrous reaction adjacent to the eggs. The occurrence of two cases in a short period of time suggests that other dogs may be infected and requires a rodent population control.

  10. Intensidade de parasitismo por Eurytrema sp em bovinos da mesorregião do Sudoeste Paulista

    Directory of Open Access Journals (Sweden)

    Pacífico António Diniz Belém

    1992-12-01

    Full Text Available By macroscopic examination, 485 pancreas of cattle from Southwestern localities of São Paulo State were checked in order to count the Eurytrema sp specimens. It was concluded that the average parasite load is low in the region under study and the occurence ranged between 7. 2% and 9.8%.

  11. Amebas de vida livre no intestino humano: evidências de parasitismo

    Directory of Open Access Journals (Sweden)

    Hércules de Moura

    1985-06-01

    Full Text Available Foram cultivadas fezes de 620 indivíduos para a pesquisa de amebas de vida livre, sendo 514 pacientes do Hospital Universitário Pedro Ernesto (UERJ e 106 crianças e adultos de um orfanato. Foram positivas 70 amostras (11,2% sendo 55 provenientes de pacientes do HU-UERJ e 15 de internos do orfanato. Foram isoladas 60 amostras de Acanthamoeba, 6 de Vahlkampfia, 5 de Hartmannella e 1 Echinamoeba. Alguns indivíduos tiveram cultura de fezes repetidamente positiva para Acanthamoeba durante dois meses de observação. Das amostras de Acanthamoeba isoladas, 28 foram inoculadas em camundongos por via intranasal, tendo sido reisoladas 16 (57,1% amostras à partir de cérebro e (ou pulmões dos animais. O estudo histopatológico demonstrou processo inflamatório agudo com presença de polimorfonucleares e amebas no cérebro e pulmões de alguns animais. O encontro de amostras patogênicas em fezes humanas reforça a hipótese do eventual desenvolvimento, em indivíduos portadores, de meningoencefalite amebiana granulomatosa, como infecção oportunística de origem endógena.

  12. Parasitismo em bovinos de raças de carne e brava no concelho de Coruche

    OpenAIRE

    Crespo, Maria Virgínia; Mariano, Pedro; ROSA, FERNANDA

    2013-01-01

    Entre março e maio de 2007 efetuou-se um estudo parasitológico em efetivos bovinos de raças de Carne e Brava do Concelho de Coruche, visando a determinação das principais helmintoses presentes. Colheram-se 206 amostras de fezes em explorações bovinas de carne e 30 em explorações de raça brava. As amostras foram sujeitas a análises coprológicas, com base em métodos qualitativos e quantitativos (técnicas de Willis, de sedimentação e de McMaster). Procedeu-se também à prospeção...

  13. Bajtín y el giro espacial: intertextualidad, vanguardismo, parasitismo

    Directory of Open Access Journals (Sweden)

    James Ramey

    2012-11-01

    Full Text Available Este artículo interviene en diversos debates actuales de los estudios literarios, con el fin de analizar el aspecto espacial o geográfico de la intertextualidad, y específicamente de las fuerzas centrípetas y centrífugas de los lenguajes nacionales teorizadas por Bajtín. Propone que los vanguardismos provienen de lo que Bajtín denomina la fuerza centrífuga o heteroglota de los lenguajes nacionales, y llega a la conclusión de que los vanguardismos en sí son entidades parasitarias que trascienden las conciencias nacionales para replicarse en el tiempo y el espacio. Incluye discusiones de obras de Stephen Greenblatt, John Brenkman, J. Hillis Miller y Benedict Anderson.

  14. Bajtín y el giro espacial: intertextualidad, vanguardismo, parasitismo

    OpenAIRE

    James Ramey

    2012-01-01

    Este artículo interviene en diversos debates actuales de los estudios literarios, con el fin de analizar el aspecto espacial o geográfico de la intertextualidad, y específicamente de las fuerzas centrípetas y centrífugas de los lenguajes nacionales teorizadas por Bajtín. Propone que los vanguardismos provienen de lo que Bajtín denomina la fuerza centrífuga o heteroglota de los lenguajes nacionales, y llega a la conclusión de que los vanguardismos en sí son entidades parasitarias que trasciend...

  15. Frecuencia de parasitismo intestinal en manipuladores de alimentos de cinco ciudades de Colombia, 2008

    OpenAIRE

    2009-01-01

    El objetivo principal de este estudio fue hallar la frecuencia de parásitos intestinales en manipuladores de alimentos que laboran en restaurantes de comidas diversas para el público, ubicados en cinco ciudades capitales del país, y conocer en estos establecimientos la implementación de las buenas prácticas de manufactura como una estrategia para la disminución de la morbilidad parasitaria y como una herramienta para su prevención. Se visitaron 300 restaurantes donde se encuestaron 905 manipu...

  16. MARTENSITIC TRANSFORMATION AND THERMAL STABILITY IN Cu-Al-Co AND Cu-Al-Zr ALLOYS

    Institute of Scientific and Technical Information of China (English)

    Y. Q. Ma; C.B. Jiang; H.B. Xu

    2003-01-01

    Cu-Al-Co and Cu-Al-Zr alloys were explored with Co or Zr additions in Cu-Al alloys for high temperature shape memory alloys. Samples were quenched after homogenized at 850℃ for 48h. It was found that both Cu-Al-Co and Cu-Al-Zr show AlCu3 martensitic phase at room temperature and exhibit martensitic transformation temperatures higher than 200℃, showing the potentials for developing as high temperature shape memory alloys. Thermal cycles were performed by DSC instrument on both Cu-Al-Co and Cu-Al-Zr alloys. The results show that Cu-Al-Co loses its martensitic transformation after five thermal cycles, and Cu-Al-Zr exhibits no martensitic transformation in the second thermal cycle.

  17. Atom probe analysis of AlN interlayers in AlGaN/AlN/GaN heterostructures

    Energy Technology Data Exchange (ETDEWEB)

    Mazumder, Baishakhi; Kaun, Stephen W.; Speck, James S. [Materials Department, University of California, Santa Barbara, California 93106 (United States); Lu, Jing; Keller, Stacia; Mishra, Umesh K. [Electrical and Computer Engineering Department, University of California, Santa Barbara, California 93106 (United States)

    2013-03-18

    Atom probe tomography was used to characterize AlN interlayers in AlGaN/AlN/GaN heterostructures grown by plasma-assisted molecular beam epitaxy (PAMBE), NH{sub 3}-based molecular beam epitaxy (NH{sub 3}-MBE), and metal-organic chemical vapor deposition (MOCVD). The PAMBE-grown AlN interlayer had the highest purity, with nearly 100% of group-III sites occupied by Al. The group-III site concentrations of Al for interlayers grown by NH{sub 3}-MBE and MOCVD were {approx}85% and {approx}47%, respectively. Hall measurements were performed to determine the two-dimensional electron gas mobility and sheet concentration. Sheet concentrations were {approx}25%-45% higher with molecular beam epitaxy than with MOCVD, and these results matched well with atom probe data.

  18. STUDY ON THE THERMODYNAMICS OF CuO/Al IN SITU Al2O3 REINFORCED Al MATRIX COMPOSITES

    Institute of Scientific and Technical Information of China (English)

    Y.Ma; Y.Hao; S.Z.Kou; X.N.Lu

    2004-01-01

    Based on the experiment and the thermodynamics analysis for CuO/Al system, it is founded that the compounding reaction of CuO/Al under low temperature is available. The general equation of adiabatic temperature of the system is set up, and the influence of resultant concentration and temperature on adiabatic temperature is theoretically analyzed. The values of heat effect of CuO/Al system under different temperature are also caculated.

  19. Al-Si/Al2O3 in situ composite prepared by displacement reaction of CuO/Al system

    Directory of Open Access Journals (Sweden)

    Zhang Jing

    2010-02-01

    Full Text Available Al2O3 particle-reinforced ZL109 composite was prepared by in situ reaction between CuO and Al. The microstructure was observed by means of OM, SEM and TEM. The Al2O3 particles in sub-micron sizes distribute uniformly in the matrix, and the Cu displaced from the in situ reaction forms net-like alloy phases with other alloy elements. The hardness and the tensile strength of the composites at room temperature have a slight increase as compared to that of the matrix. However, the tensile strength at 350 ℃ has reached 90.23 MPa, or 16.92 MPa higher than that of the matrix. The mechanism of the reaction in the CuO/Al system was studied by using of differential scanning calorimetry(DSC and thermodynamic calculation. The reaction between CuO and Al involves two steps. First, CuO reacts with Al to form Cu2O and Al2O3 at the melting temperature of the matrix alloy, and second, Cu2O reacts with Al to form Cu and Al2O3 at a higher temperature. At ZL109 casting temperature of 750–780 ℃, the second step can also take place because of the effect of exothermic reaction of the first step.

  20. Aproximaciones cientificas al mestizo mexicano

    Directory of Open Access Journals (Sweden)

    Carlos Lopez-Beltran

    2013-06-01

    Full Text Available La categoría colonial del mestizo fue un recurso ideológico, formador de la identidad nacional en la posrevolución mexicana. El eje indio-mestizo sirvió para organizar las interacciones étnicas y las políticas del estado. Médicos y antropólogos reforzaron esta taxonomía dual en estudios de poblaciones humanas, produciendo con marcadores biomédicos y descripciones diferenciadas del indio y del mestizo. Las descripciones genómicas han contribuido tanto a la construcción de una noción cientificista del mestizo arraigada en porcentajes de ancestría india, europea y africana, como al surgimiento de dos objetos tecnocientíficos que llamamos el mestizo molecular y el mestizo bioinformático. Aquí describimos las interacciones entre las encarnaciones ideológicas y científicas del mestizo.

  1. Response to Durif et al.

    Science.gov (United States)

    Putman, Nathan F; Naisbett-Jones, Lewis C; Stephenson, Jessica F; Ladak, Sam; Young, Kyle A

    2017-09-25

    Our recent study [1] in Current Biology used a magnetic displacement experiment and simulations in an ocean circulation model to provide evidence that young European eels possess a 'magnetic map' that can aid their marine migration. Our results support two major conclusions: first, young eels distinguish among magnetic fields corresponding to locations across their marine range; second, for the fields that elicited significantly non-random orientation, swimming in the experimentally observed direction from the corresponding locations would increase entrainment in the Gulf Stream system. In their critique, Durif et al.[2] seem to conflate the separate and potentially independent 'map step' and 'compass step' of animal navigation. In the map step, an animal derives positional information to select a direction, whereas in the compass step the animal maintains that heading [3,4]. Our experiment was designed such that differences in eel orientation among treatments would indicate an ability to use the magnetic field as a map; the compass cue(s) used by eels was not investigated. Copyright © 2017 Elsevier Ltd. All rights reserved.

  2. Entrevista al narrador Tommaso Pincio

    Directory of Open Access Journals (Sweden)

    Franco Zangrilli

    2016-07-01

    Full Text Available El autor Tommaso Pincio, seudónimo di Marco Colapietro (Roma, 1963, es sin lugar a dudas uno de los narradores de mayor proyección en el panorama literario de los últimos tiempos. Iniciada su carrera en 1999 con M., ha publicado títulos como Lo spazio sfinito (2000 y Un amore dell'altro mondo (2002, en el que narra la vida de Kurt Cobain, líder del grupo Nirvana, a través de la visión de un amigo imaginario. A estas dos novelas siguieron La ragazza che non era lei (2005, Gli alieni (2006 o Cinacittà. Memorie del mio delitto efferato (2008, ambientada en una Roma colonizada por los chinos y abandonada por los mismos romanos a causa de problemas medioambientales. Títulos como L'hotel a zero stelle (2011, un ensayo autobiográfico en el que plantea diálogos ficticios con algunos de los grandes nombres de la literatura o la más reciente Panorama (2015, le han hecho valerse un hueco provilegiado entre los nuevos narradores surgidos en estas primeras décadas de siglo. Justamente la publicación de esta última novela, Panorama, ha servido de excusa al profesor Franco Zangrilli, gran conocedor de su obra, a plantearle algunas preguntas sobre temas clave de su producción.

  3. Comentario al libro: ACADEMIA MUTISIANA

    Directory of Open Access Journals (Sweden)

    Efraím Otero Ruiz

    2012-04-01

    Full Text Available Por tercera vez en un quinquenio ocupo este podio para ocuparme de uno de los libros del grupo de inmunogenética (o de anti-inmunohistoria, diría yo de la Universidad Javeriana, esta vez enriquecido con la presencia del P. Ortiz Valdivieso, orquídeologo y mutisiólogo y del Dr. Uribe Angel notable historiador educativo, y presentado admirablemente por el P. Durán Casas, Vicerrector Académico de la Universidad Javeriana. En el prólogo, citando desde Sarton y Ziman en los 70s. hasta Mauro Torres en el 2011 afirmo que, aunque suene extraño, parece como si las Academias florecieran entre las guerras. Tal sucedió con la de Platón, “la máxima institución de enseñanza superior surgida en el mundo”, -al decir de Sartonenmarcada desde las guerras del Peloponeso, hasta el final de la dominación espartana de Atenas en el siglo IV antes de Cristo. Según dichos autores, las Academias han simbolizado una manera de continuar la vida espiritual entre uno y otro conflicto.

  4. Reply to Vance et al.

    Energy Technology Data Exchange (ETDEWEB)

    Woon-Chee Yee; Elliott, J.L; Kwon, J.M.; Goodfellow, P. [Washington Univ. School of Medicine, St. Louis, MO (United States)

    1996-07-01

    In our report of a family with a motor and sensory polyneuropathy that was linked to chromosome 3q, we classified this neuropathy as a form of hereditary motor and sensory neuropathy II (HMSN II, also known as {open_quotes}CMT2{close_quotes}). Doubts have been raised by Vance et al. as to whether this neuropathy should be classified as hereditary sensory autonomic neuropathy I (HSAN I) instead of HMSN II. While it is reasonable to raise such doubts, we believe that the neuropathy is best designated as HMSN II for the reasons described below. The group of disorders described as HSAN are characterized by primary or predominant involvement of sensory and autonomic neurons that fail to develop or that undergo atrophy and degeneration. These disorders were extensively reviewed by Dyck and Ohta, who initially described them as the hereditary sensory neuropathies (HSN). It was Dyck who subsequently suggested that these disorders be designated HSAN rather than HSN, because of the presence of autonomic involvement. 8 refs.

  5. Derecho civil : aproximaciones al derecho de personas

    OpenAIRE

    2005-01-01

    Las universidades de hoy, siguiendo las últimas tendencias de docencia universitaria que proponen minimizar la participación del profesor en la tarea del aprendizaje, han trasladado al estudiante al esfuerzo de apropiarse de la información necesaria para el conocimiento de las ciencias; Sin embargo, los libros y documentos que se entregan al estudiante para que se empape de los conceptos fundamentales siguen siendo textos fríos y desapacibles cuya utilidad estaba ligada a las explicaciones pr...

  6. Fabrication of AlN-TiC/Al composites by gas injection processing

    Institute of Scientific and Technical Information of China (English)

    YU Huashun; CHEN Hongmei; MA Rendian; MIN Guanghui

    2006-01-01

    The fabrication of AlN-TiC/Al composites by carbon-and nitrogen-containing gas injection into Al-Mg-Ti melts was studied. It was shown that AlN and TiC particles could be formed by the in situ reaction of mixture gas (N2+C2H2+NH3) with Al-Mg-Ti melts. The condition for the formation of AlN was that the treatment temperature must be higher than 1373 K, and the amounts of AlN and TiC increased with the increase of the treatment temperature and the gas injection time.It was considered that AlN was formed by the direct reaction of Al with nitrogen-containing gas at the interface of the gas bubble and the melt. However, the mechanism of TiC formation is a combination mechanism of solution-precipitation and solid-liquid reaction.

  7. First-principles study of the Al(001)-Al3Nb(001) interfacial properties

    Science.gov (United States)

    Ding, Yanhong; Xu, Rui

    2017-03-01

    The adhesion, interfacial energy and bonding on fcc-Al(001)/D022-Al3Nb(001) interface were investigated using density functional calculations. Considering different terminations of Al3Nb(001) (Al+Nb-terminated and Al-terminated) and stacking sites (top-, bridge- and center-sites), six Al(001)/Al3Nb(001) models were calculated. For the models with same stacking site, Al+Nb-terminated model has larger work of adhesion (Wad) than the Al-terminated one. For the models with same termination, the work of adhesion increases, and the interface energy decreases as the order of center-sited, bridge-sited and top-sited. Al+Nb-terminated-center-sited and Al-terminated-center-sited models are more stable among six models. The interfacial bonding was discussed with analysis of valence electron density distribution and partial density of states (PDOS). The bonding is mainly contributed from Al-Nb covalent bonds and Al-Al metallic interactions.

  8. Casting fabrication of in situ Al3Ti-Al composites and their wear behaviors

    Institute of Scientific and Technical Information of China (English)

    Chen Tijun; Li Jian; Hao Yuan

    2009-01-01

    The Al3li intermetallic reinforced pure Al, Al-13Si and Al-17Cu matrix composites were prepared by casting method. Their microstructures and dry sliding wear behaviors at room temperature and 100℃ were particularly investigated. The results indicated that the Al3Ti phases in these composites were all in flaky form. But the aspect ratio of the Al3Ti platelets decreased with the increase of Ti content in the pure AI, Al-Cu and Al-Si matrix composites, in order of effectiveness. The effect of Si on the Al3Ti morphology seemed to be greater than that of Cu. The distributions of the Al3Ti platelets were different in the different matrix composites, leading to different grain refining effects. Except for the sub-wear regime of adhesive wear, the plastic deformation induced wear was a dominant wear mechanism for all of the composites at room temperature and 100℃. Increasing the testing temperature, decreasing the Al3Ti content or the hardness of materials could enhance these two wear mechanisms, and thus increase the wear rate. The Al-Cu matrix composite had the best wear resistance, while the pure Al matrix composite showed the worst for the same Ti content. These differences or changes were attributed to the differences in materials' hardness or the strengthening effects of the Al3Ti platelets.

  9. Electrodeposition of Al from a 1-butylpyrrolidine-AlCl3 ionic liquid

    Directory of Open Access Journals (Sweden)

    Giridhar Pulletikurthi

    2015-12-01

    Full Text Available The addition of 1-butylpyrrolidine to AlCl3 results in the formation of an electrolyte that is suited to Al deposition. The feasibility of electrodepositing Al from the synthesized electrolyte was investigated. Several compositions of AlCl3 and 1-butylpyrrolidine were prepared for this purpose. These mixtures show a different phase behavior at various compositions of AlCl3 and 1-butylpyrrolidine. IR, Raman and NMR spectroscopy were employed to characterize the synthesized liquids. Among the prepared compositions, 1:1.2 mol ratio of 1-butylpyrrolidine:AlCl3 and the upper phase of 1:1.3 mol ratio of 1-butylpyrrolidine:AlCl3 were found to be suitable for Al electrodeposition at room temperature (RT. Uniform and thick (~µm thick layers of Al were obtained on copper at RT. Al deposition occured from the cationic species of AlCl3−xLy+ (where x≤2, y=1–2, and L=1-butylpyrrolidine in this electrolyte. This behavior is contrary to the well investigated classic AlCl3 based ionic liquids, where the deposition of Al occurs mainly from anionic Al2Cl7− ions.

  10. Genetics of Familial and Sporadic ALS

    Science.gov (United States)

    2016-03-21

    Amyotrophic Lateral Sclerosis (ALS); Familial Amyotrophic Lateral Sclerosis; Amyotrophic Lateral Sclerosis With Frontotemporal Dementia; Lou Gehrig's Disease; Motor Neuron Disease; Primary Lateral Sclerosis

  11. Effect of Excess Al in TiO2-Al Powder Mixture and Susceptor Material on Microwave Synthesis of TiAl/Al2O3 Composite

    Directory of Open Access Journals (Sweden)

    P. Radmehr

    2016-03-01

    Full Text Available In this research, TiAl/Al2O3 composite was synthesized from mechanically activated TiO2-Al powder mixtures using microwave heating.The initial powder mixtures were mechanically activated and pressed into cylindrical tablets and then heated in a microwave oven. The effect of different amounts of excess Al and microwave susceptor material (SiC or graphite on the ignition time and the resultant reaction products were evaluated. X-ray diffraction (XRD and scanning electron microscopy (SEM analysis were used for characterization of the synthesized samples. XRD patterns revealed that when there was no excess Al in the initial powder mixture, the main resulting intermetallic phase would be Ti3Al with negligible amounts of TiAl, while with 10 wt% excess Al, TiAl phase could be formed in the composite product.The results also showed that microwave synthesis took place faster and more reproducible when samples were packed in the graphite powder than when placed between two SiC blocks.

  12. Interfacial Phenomena in Al/Al, Al/Cu, and Cu/Cu Joints Soldered Using an Al-Zn Alloy with Ag or Cu Additions

    Science.gov (United States)

    Pstruś, Janusz; Gancarz, Tomasz

    2014-05-01

    The studies of soldered joints were carried out in systems: Al/solder/Al, Al/solder/Cu, Cu/solder/Cu, where the solder was (Al-Zn)EUT, (Al-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Ag and (Al-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Cu addition. Brazing was performed at 500 °C for 3 min. The EDS analysis indicated that the composition of the layers starting from the Cu pad was CuZn, Cu5Zn8, and CuZn4, respectively. Wetting tests were performed at 500 °C for 3, 8, 15, and 30 min, respectively. Thickness of the layers and their kinetics of growth were measured based on the SEM micrographs. The formation of interlayers was not observed from the side of Al pads. On the contrary, dissolution of the Al substrate and migration of Al-rich particles into the bulk of the solder were observed.

  13. Atomic structure and oxygen deficiency of the ultrathin aluminium oxide barrier in Al/AlOx/Al Josephson junctions

    Science.gov (United States)

    Zeng, Lunjie; Tran, Dung Trung; Tai, Cheuk-Wai; Svensson, Gunnar; Olsson, Eva

    2016-07-01

    Al/AlOx/Al Josephson junctions are the building blocks of a wide range of superconducting quantum devices that are key elements for quantum computers, extremely sensitive magnetometers and radiation detectors. The properties of the junctions and the superconducting quantum devices are determined by the atomic structure of the tunnel barrier. The nanoscale dimension and disordered nature of the barrier oxide have been challenges for the direct experimental investigation of the atomic structure of the tunnel barrier. Here we show that the miniaturized dimension of the barrier and the interfacial interaction between crystalline Al and amorphous AlOx give rise to oxygen deficiency at the metal/oxide interfaces. In the interior of the barrier, the oxide resembles the atomic structure of bulk aluminium oxide. Atomic defects such as oxygen vacancies at the interfaces can be the origin of the two-level systems and contribute to decoherence and noise in superconducting quantum circuits.

  14. Atomic structure and oxygen deficiency of the ultrathin aluminium oxide barrier in Al/AlOx/Al Josephson junctions.

    Science.gov (United States)

    Zeng, Lunjie; Tran, Dung Trung; Tai, Cheuk-Wai; Svensson, Gunnar; Olsson, Eva

    2016-07-12

    Al/AlOx/Al Josephson junctions are the building blocks of a wide range of superconducting quantum devices that are key elements for quantum computers, extremely sensitive magnetometers and radiation detectors. The properties of the junctions and the superconducting quantum devices are determined by the atomic structure of the tunnel barrier. The nanoscale dimension and disordered nature of the barrier oxide have been challenges for the direct experimental investigation of the atomic structure of the tunnel barrier. Here we show that the miniaturized dimension of the barrier and the interfacial interaction between crystalline Al and amorphous AlOx give rise to oxygen deficiency at the metal/oxide interfaces. In the interior of the barrier, the oxide resembles the atomic structure of bulk aluminium oxide. Atomic defects such as oxygen vacancies at the interfaces can be the origin of the two-level systems and contribute to decoherence and noise in superconducting quantum circuits.

  15. Kritik al-Ghazali terhadap Kekekalan Alam

    Directory of Open Access Journals (Sweden)

    Sahidi Mustafa

    2015-09-01

    Full Text Available The concept of the creation of universe offered by Neo-Platonism philosopher such as al-Kindi, al-Farabi, and Ibnu Sina are philosophical concept existed and came as an early moment of development of Islamic philosophy interrelated to God, ultimately about his Existence and Characteristics. One of the topics is how God created the universe. According to al-Farabi and Ibnu Sina, God created this universe by way of emanation in order to prevent Himself from the new attitudes. Consequently, universe has eternal feature (qadim as God as well, in the case of everything overflowed from qadim is also qadim. Al-Ghazali refuted this theory because it contradicted with al Qur’an’s thought which clearly explained that God created the entire universe. The universe should not qadim and it means that God existed in the first, and then created universe later as we know today. On the contrary, in the view of Muslim philosopher, the universe should be qadim because God created it from all eternity. For them, it is impossible that God existed by Himself without any creation before. God, according to them is impossible to be changed, so that is impossible as well if God changed from did not create yet before and then creates. Al-Ghazali persistently opposed the concept of eternity. Al Ghazali saw if this universe is qadim so it is impossible that universe created by God. The concept of qadim will led to the conclusion that universe born by itself, it was not created by God. This critique has been written by al-Ghazali in Tahafut al-Falasifah. This paper will present the concept of eternity which was discussed by al-Farabi and Ibn Sina and al Ghazali’s critique toward it as well.

  16. Respuesta inmune adaptativa al rotavirus

    Directory of Open Access Journals (Sweden)

    Manuel A. Franco

    2004-03-01

    Full Text Available

    El rotavirus (RV es un importante patógeno humano y el estudio de la respuesta inmune específica de éste en humanos, es un buen modelo para caracterizar la respuesta inmune de la mucosa intestinal (1. Nuestros estudios han tenido como objetivo la caracterización fenotípica y funcional de las células T y B específicas de RV con énfasis importante en la expresión de marcadores de migración intestinal. Estas células son estudiadas en muestras de sangre periférica de niños y adultos recientemente infectados con RV. Los análisis se hicieron por citometría de flujo y ELISPOT. Estudio de células T: los adultos sanos presentan bajas frecuencias circulantes tanto de LT CD4+, como de LT CD8+ específicos de RV que secretan INF_ .

    Significativamente mayores porcentajes de éstas células se detectaron en adultos sintomáticos infectados por RV. Sin embargo, las frecuencias de LT específicos de RV en todos los grupos de estudio fueron muy bajas comparadas con las observadas para otros patógenos.

    Sorprendentemente, en niños sintomáticos infectados por RV se detectaron bajas frecuencias de LT CD8+ circulantes específicos de RV secretando INF-g y muy pocos o ningún LT CD4+ secretando INF-g o LT CD4+ y CD8+ al secretar IL-13 o IL4 (2,3. Esto sugiere que el RV es un inductor relativamente pobre de células T de memoria secretando estas citoquinas. Los LT circulantes CD4+ , INF-g.+ específicos de RV presentes en adultos

  17. Microstructural and Phase Composition Differences Across the Interfaces in Al/Ti/Al Explosively Welded Clads

    Science.gov (United States)

    Fronczek, Dagmara Malgorzata; Chulist, Robert; Litynska-Dobrzynska, Lidia; Lopez, Gabriel Alejandro; Wierzbicka-Miernik, Anna; Schell, Norbert; Szulc, Zygmunt; Wojewoda-Budka, Joanna

    2017-09-01

    The microstructure and phase composition of Al/Ti/Al interfaces with respect to their localization were investigated. An aluminum-flyer plate exhibited finer grains located close to the upper interface than those present within the aluminum-base plate. The same tendency, but with a higher number of twins, was observed for titanium. Good quality bonding with a wavy shape and four intermetallic phases, namely, TiAl3, TiAl, TiAl2, and Ti3Al, was only obtained at the interface closer to the explosive material. The other interface was planar with three intermetallic compounds, excluding the metastable TiAl2 phase. As a result of a 100-hour annealing at 903 K (630 °C), an Al/TiAl3/Ti/TiAl3/Al sandwich was manufactured, formed with single crystalline Al layers. A substantial difference between the intermetallic layer thicknesses was measured, with 235.3 and 167.4 µm obtained for the layers corresponding to the upper and lower interfaces, respectively. An examination by transmission electron microscopy of a thin foil taken from the interface area after a 1-hour annealing at 825 K (552 °C) showed a mixture of randomly located TiAl3 grains within the aluminum. Finally, the hardness results were correlated with the microstructural changes across the samples.

  18. Kus on al-Zarqawi? / Aadu Hiietamm

    Index Scriptorium Estoniae

    Hiietamm, Aadu, 1954-

    2005-01-01

    Suurbritannia nädalalehe Sunday Times andmetel on Iraagi tagaotsituim mässaja, terrorivõrgustiku al Qaeda liitlane Abu-Musab al-Zarqawi pärast USA raketirünnakus haavatasaamist riigist põgenenud

  19. Quantitatively Probing the Al Distribution in Zeolites

    Energy Technology Data Exchange (ETDEWEB)

    Vjunov, Aleksei; Fulton, John L.; Huthwelker, Thomas; Pin, Sonia; Mei, Donghai; Schenter, Gregory K.; Govind, Niranjan; Camaioni, Donald M.; Hu, Jian Z.; Lercher, Johannes A.

    2014-06-11

    The degree of substitution of Si4+ by Al3+ in the oxygen-terminated tetrahedra (Al T-sites) of zeolites determines the concentration of ion-exchange and Brønsted acid sites. As the location of the tetrahedra and the associated subtle variations in bond angles influence the acid strength, quantitative information about Al T-sites in the framework is critical to rationalize catalytic properties and to design new catalysts. A quantitative analysis is reported that uses a combination of extended X-ray absorption fine structure (EXAFS) analysis and 27Al MAS NMR spectroscopy supported by DFT-based molecular dynamics simulations. To discriminate individual Al atoms, sets of ab initio EXAFS spectra for various T-sites are generated from DFT-based molecular dynamics simulations allowing quantitative treatment of the EXAFS single- and multiple-photoelectron scattering processes out to 3-4 atom shells surrounding the Al absorption center. It is observed that identical zeolite types show dramatically different Al-distributions. A preference of Al for T-sites that are part of one or more 4-member rings in the framework over those T-sites that are part of only 5- and 6-member rings in the HBEA150 sample has been determined from a combination of these methods. This work was supported by the U. S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences & Biosciences.

  20. Kus on al-Zarqawi? / Aadu Hiietamm

    Index Scriptorium Estoniae

    Hiietamm, Aadu, 1954-

    2005-01-01

    Suurbritannia nädalalehe Sunday Times andmetel on Iraagi tagaotsituim mässaja, terrorivõrgustiku al Qaeda liitlane Abu-Musab al-Zarqawi pärast USA raketirünnakus haavatasaamist riigist põgenenud

  1. The role of inclusions in ALS pathogenesis

    NARCIS (Netherlands)

    V. van Dis (Vera)

    2012-01-01

    textabstractAmyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disease that primarily afflicts motor neurons, leading to paralysis and death within 3 to 5 years after diagnosis. Genetic studies have uncovered multiple genetic defects causing familial forms of ALS and mutations oc

  2. La enfermedad alérgica respiratoria

    OpenAIRE

    Serrano Reyes Carlos Daniel; Fundación Valle de Lili

    2005-01-01

    ¿Qué es la enfermedad alérgica respiratoria?/¿Qué factores de riesgo existen para el desarrollo de rinitis y asma?/¿Cuáles son los principales alérgenos causantes de las alergias respiratorias?/¿Cómo se diagnostica la alergia respiratoria?/¿Cómo se trata la alergia respiratoria?

  3. Geluk als onderwerp van wetenschappelijk onderzoek

    NARCIS (Netherlands)

    R. Veenhoven (Ruut)

    1970-01-01

    textabstractAbstract in Dutch: Geluk wordt gedefinieerd als overwegende tevredenheid met het leven als geheel. Dit artikel geeft een overzicht van het onderzoek naar dat verschijnsel. Geluk blijkt deels afhankelijk van persoonlijke eigenschappen. Zo blijkt ondermeer dat gelukkige mensen over het

  4. Ceramic foams for Al-recycling

    Energy Technology Data Exchange (ETDEWEB)

    Luyten, J.; Vandermeulen, W.; Schutter, F. de [VITO, Materials Technology, Mol (Belgium); Simensen, C. [Sintef, Materials Technology, Blindern, Oslo (Norway); Ryckeboer, M. [Remi Claeys Aluminium, Lichtervelde (Belgium)

    2006-08-15

    The recycling of Al scrap requires an efficient purification step. In this investigation a filter technique is used to remove intermetallic compounds containing Fe, Mn and Si out of the molten Al. The paper describes the synthesis of the filters, the construction of the filter installation, and the results of the different filter tests. (Abstract Copyright [2006], Wiley Periodicals, Inc.)

  5. Diana Al-Hadid: Identity and Heritage

    Science.gov (United States)

    Jungerberg, Tom; Smith, Anna; Borsh, Colleen

    2012-01-01

    Diana Al-Hadid's sculptures reflect the many locations, cultures, histories, and mythologies that have shaped her as an artist. In large-scale works which have the appearance of architectural ruins, Al-Hadid employs imagery drawn from many diverse interests including science and technology, history, and literature. She also incorporates images and…

  6. Al-Farabi dan Filsafat Kenabian

    Directory of Open Access Journals (Sweden)

    Qosim Nursheha Dzulhadi

    2014-03-01

    Full Text Available Artikel ini mengulas pemikiran al-Farabi tentang konsep kenabian dalam Islam. Masalah berawal dari adanya pemikiran yang menolak konsep kenabian pada umumnya dan kenabian Nabi Muhammad SAW khususnya. Sebagaimana yang dilontarkan oleh Muhammad Ahmad ibn al-Ruwandi. Ia mengatakan bahwa nabi sebenarnya tidak diperlukan manusia karena Tuhan telah mengaruniakan akal kepada manusia tanpa terkecuali. Dengan akal ini, manusia dapat mengetahui Tuhan beserta segala nikmat Nya dan dapat pula mengetahui perbuatan baik dan buruk, menerima suruhan dan larangan-Nya. Dengan demikian, nabi dengan segala fungsinya tidak diperlukan lagi. Bahkan, kitab suci pun tidak berguna untuk dibaca. Lebih berguna membaca buku filsafat Epicurus, Plato, Aristoteles, dan buku astronomi, logika, serta obat-obatan. Hal ini tentunya bertolak belakang dengan yang diajarkan dalam Islam. Beriman kepada nabi nabi merupakan hal inti dalam ajaran agama ini. Atas dasar itu al-Farabi bereaksi keras. Baginya, pandangan Ibn al-Ruwandi di atas tidak dapat dibenarkan, khususnya dari sisi akidah Islam. Sebagai al-Mu‘allim al-Tsani (Guru Kedua, karena prestasinya dalam menjelaskan dan mengulas-ulang filsafat Aristoteles, al-Farabi mengkritik secara sistematik pandangan menyimpang al-Ruwandi di atas.

  7. Diana Al-Hadid: Identity and Heritage

    Science.gov (United States)

    Jungerberg, Tom; Smith, Anna; Borsh, Colleen

    2012-01-01

    Diana Al-Hadid's sculptures reflect the many locations, cultures, histories, and mythologies that have shaped her as an artist. In large-scale works which have the appearance of architectural ruins, Al-Hadid employs imagery drawn from many diverse interests including science and technology, history, and literature. She also incorporates images and…

  8. Kinetic Monte Carlo of transport processes in Al/AlOx/Au-layers: Impact of defects

    Directory of Open Access Journals (Sweden)

    Benedikt Weiler

    2016-09-01

    Full Text Available Ultrathin films of alumina were investigated by a compact kMC-model. Experimental jV-curves from Al/AlOx/Au-junctions with plasma- and thermal-grown AlOx were fitted by simulated ones. We found dominant defects at 2.3-2.5 eV below CBM for AlOx with an effective mass mox∗=0.35 m0 and a barrier EB,Al/AlOx≈2.8 eV in agreement with literature. The parameterization is extended to varying defect levels, defect densities, injection barriers, effective masses and the thickness of AlOx. Thus, dominant charge transport processes and implications on the relevance of defects are derived and AlOx parameters are specified which are detrimental for the operation of devices.

  9. Data supporting Al-Abed et al., Environ. Sci.: Nano, 2016,

    Data.gov (United States)

    U.S. Environmental Protection Agency — Data files representing each of the Figures and Tables published in Al-Abed et al., Environ. Sci.: Nano, 2016, 3, 593. The data file names identify the Figure or...

  10. AL-BADIHIYYAH FIL AL-QUR'AN WASHOLATIHA BIL BALAGHAH

    Directory of Open Access Journals (Sweden)

    Nur Hadi

    2011-10-01

    Full Text Available Al-Qur’an senantiasa menjadi objek kajian yang tak ada batas. Semakin lengkap piranti yang kita gunakan untuk mengkaji, maka semakin banyak pula yang kita peroleh. Berbagai model kajian bahasa seperti ilmu Fonologi (ilm al-ashwat, Morfologi (ilm al-sharf, Sintaksis (ilm al-nahw, Semantik (ilm al-dalalah, Balaghah (ilm al-balaghah dan lain-lain, lahir melalui al-Qur’an. Semua itu tidak terlepas dari keberadaan al-Qur’an sebagai kitab suci yang mu’jiz sepanjang zaman yang selalu dipelajari oleh manusia, terutama umat Islam. Karena itu, tulisan ini memfokuskan pada peran badihiyah (kemampuan alami yang telah ada pada diri manusia sebagai bekal untuk mengenal ayat Allah.

  11. Konsepsi Ibnu Jarir Al-Tabari Tentang Al-Qur’an, Tafsir Dan Ta’wil

    Directory of Open Access Journals (Sweden)

    A.M Ismatulloh

    2012-12-01

    Full Text Available The objective of this research is to describe the concept of Ibnu Jarir al-Tabari about al-Qur’an, tafsir and ta’wil. Ibn Jarir al-Tabari is an outstanding expert in the classic Islamic tradition. His knowledge in hadits, fiqh, lughah, history, and tafseer is unquestionable. This study uses an analytical descriptive design. The findings show that: Firstly, in defining al-Qur’an, al-Tabari focused on the al-Qur’an as an Arabic language text, not in other language. Secondly, al-Qur’an is written in sab’ah ahruf. It means that there are 7 different kinds of language with the same meaning. Thirdly, al-Qur’an comes from seven heaven’s door. Fourthly, there is no different word between tafseer and ta’wil. They have same meaning. These concepts are different to other concepts proposed by other ulama.

  12. Effect of Al coating conditions on laser weldability of Al coated steel sheet

    Institute of Scientific and Technical Information of China (English)

    Jung-Han LEE; Jong-Do KIM; Jin-Seok OH; Seo-Jeong PARK

    2009-01-01

    Al coated steel sheets with excellent heat resistance, thermal reflection, and corrosion resistance are widely used in various applications. The laser weldability of the Al coated steel sheet for full penetration welding was reported. The phenomenon caused by intermixed aluminum and behavior of aluminum in the weld were investigated. Al coated steel sheets that have various thickness and coating mass were prepared for laser welding. The effects of parameters such as welding conditions and Al coating conditions were investigated. Al content mixed in the weld after laser welding was evaluated, and then a correlation between the mixed Al and mechanical properties was investigated. The results show that the Al-rich zones which have Fe-Al intermetallic compounds are found in the weld. The intermetallic compounds cause the decreased strength of the weld.

  13. Thermoluminescence properties of AlN ceramics

    DEFF Research Database (Denmark)

    Trinkler, L.; Christensen, P.; Agersnap Larsen, N.

    1998-01-01

    The paper describes thermoluminescence (TL) properties of AlN:Y2O3 ceramics irradiated with ionising radiation. A high TL sensitivity of AlN:Y2O3 ceramics to radiation encouraged a study of the AlN ceramics for application as a dosimetric material. The paper presents experimental data on: glow...... curve, emission spectrum, dose response, energy dependence, influence of heating rate and fading rate. The measured TL characteristics were compared with those of well-known, widely used TLDs, i.e. LiF:Mg,Ti, LiF:Mg,Cu,P and Al2O3:C. It is concluded that AlN:Y2O3 ceramics showing a radiation sensitivity...

  14. Wallada Bint al Mustakfi entre dos culturas

    OpenAIRE

    shreen Mahmoud Al Refai

    2013-01-01

    La princesa cordobesa Wallada Bint al Mustakfi bil-lah, hija del califa al Mustakfi Muhammad Ibn Abdel Rahman Ibn Obaidil-lah Ibn Al Nasir lidin Al-lah era una poetisa estimable, a quien los grandes poetas no podían superar. Era una mujer única, guapa y decente. Mantenía una relación sentimental con el  poeta y visir Ibn Zaydún. Dicha pasión, narrada por los poemas escritos por ambos amantes, se terminó por la separación debida a los celos, también de ambos;  al poeta le gustó la voz de una e...

  15. NiAl alloys for structural uses

    Science.gov (United States)

    Koss, D. A.

    1991-01-01

    Alloys based on the intermetallic compound NiAl are of technological interest as high temperature structural alloys. These alloys possess a relatively low density, high melting temperature, good thermal conductivity, and (usually) good oxidation resistance. However, NiAl and NiAl-base alloys suffer from poor fracture resistance at low temperatures as well as inadequate creep strength at elevated temperatures. This research program explored macroalloying additions to NiAl-base alloys in order to identify possible alloying and processing routes which promote both low temperature fracture toughness and high temperature strength. Initial results from the study examined the additions of Fe, Co, and Hf on the microstructure, deformation, and fracture resistance of NiAl-based alloys. Of significance were the observations that the presence of the gamma-prime phase, based on Ni3Al, could enhance the fracture resistance if the gamma-prime were present as a continuous grain boundary film or 'necklace'; and the Ni-35Al-20Fe alloy was ductile in ribbon form despite a microstructure consisting solely of the B2 beta phase based on NiAl. The ductility inherent in the Ni-35Al-20Fe alloy was explored further in subsequent studies. Those results confirm the presence of ductility in the Ni-35Al-20Fe alloy after rapid cooling from 750 - 1000 C. However exposure at 550 C caused embrittlement; this was associated with an age-hardening reaction caused by the formation of Fe-rich precipitates. In contrast, to the Ni-35Al-20Fe alloy, exploratory research indicated that compositions in the range of Ni-35Al-12Fe retain the ordered B2 structure of NiAl, are ductile, and do not age-harden or embrittle after thermal exposure. Thus, our recent efforts have focused on the behavior of the Ni-35Al-12Fe alloy. A second parallel effort initiated in this program was to use an alternate processing technique, mechanical alloying, to improve the properties of NiAl-alloys. Mechanical alloying in the

  16. The neuropathology of FTD associated With ALS.

    Science.gov (United States)

    Mackenzie, Ian R A

    2007-01-01

    There is increasing recognition of a clinical overlap between frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS). Recent advances in our understanding of the neuropathologic, biochemical, and genetic basis of these conditions provides evidence for a common underlying pathogenesis. The neuropathology in most cases of FTD with ALS is a subtype of frontotemporal lobar degeneration, characterized by neuronal inclusions that are immunoreactive for ubiquitin but not tau (frontotemporal lobar degeneration with ubiquitinated inclusions). These cases show significant pathologic overlap with clinically pure FTD and those with classic ALS. Moreover, the ubiquitinated pathologic protein in all these conditions has recently been identified as TDP-43. A number of families have been reported with autosomal dominant FTD-ALS linked to chromosome 9p and these also have TDP-43-positive frontotemporal lobar degeneration with ubiquitinated inclusions pathology. Together, these findings suggest that FTD-ALS is part of a clinicopathologic spectrum of disease, now identified as TDP-43 proteinopathies.

  17. Memes als moderne Bildungsmedien: Humor als Medium pädagogischer Interaktion zur Wissenskonstruktion im Physikunterricht

    OpenAIRE

    Prescher, Thomas; Thees, Michael

    2015-01-01

    Memes stellen ein modernes Bildmedium dar. Im Beitrag wird die Frage verfolgt, ob Memes mit ihrem inhärenten Humor innerhalb des Unterrichts auch als Bildungsmedium dienen und didaktisch genutzt werden können. Dazu wird Humor als generalisiertes Kommunikationsmedium pädagogischer Interaktion beschrieben, um Memes als moderne Bildmedien - in ihrer Wirkung als humorvolle Form der affektiven und kognitiven Inkongruenzstiftung - zur Entwicklung von Fachkonzepten im Physikunterricht fassen zu könn...

  18. XAFS Study of the Al K-Edge in NaAlH4

    NARCIS (Netherlands)

    Balde, C.P.; Mijovilovich, A.E.; Koningsberger, D.C.; van der Eerden, A.M.J.; Smith, A.D.; de Jong, K.P.; Bitter, J.H.

    2007-01-01

    Al K-edge (1561.1 eV) XANES and EXAFS spectra of unoxidized NaAlH4, a hydrogen storage material, have been recorded in He atmosphere in a special in situ low-energy cell. The XANES spectrum of NaAlH4 is reported and compared to that of oxidized NaAlH4, thus illustrating the power of XANES spectrosco

  19. High temperature creep behaviour of Al-rich Ti-Al alloys

    Science.gov (United States)

    Sturm, D.; Heilmaier, M.; Saage, H.; Aguilar, J.; Schmitz, G. J.; Drevermann, A.; Palm, M.; Stein, F.; Engberding, N.; Kelm, K.; Irsen, S.

    2010-07-01

    Compared to Ti-rich γ-TiAl-based alloys Al-rich Ti-Al alloys offer an additional reduction of in density and a better oxidation resistance which are both due to the increased Al content. Polycrystalline material was manufactured by centrifugal casting. Microstructural characterization was carried out employing light-optical, scanning and transmission electron microscopy and XRD analyses. The high temperature creep of two binary alloys, namely Al60Ti40 and Al62Ti38 was comparatively assessed with compression tests at constant true stress in a temperature range between 1173 and 1323 K in air. The alloys were tested in the cast condition (containing various amounts of the metastable phases Al5Ti3 and h-Al2Ti) and after annealing at 1223 K for 200 h which produced (thermodynamically stable) lamellar γ-TiAl + r-Al2Ti microstructures. In general, already the as-cast alloys exhibit a reasonable creep resistance at 1173 K. Compared with Al60Ti40, both, the as-cast and the annealed Al62Ti38 alloy exhibit better creep resistance up to 1323 K which can be rationalized by the reduced lamella spacing. The assessment of creep tests conducted at identical stress levels and varying temperatures yielded apparent activation energies for creep of Q = 430 kJ/mol for the annealed Al60Ti40 alloy and of Q = 383 kJ/mol for the annealed Al62Ti38 material. The latter coincides well with that of Al diffusion in γ-TiAl, whereas the former can be rationalized by the instability of the microstructure containing metastable phases.

  20. Corrosion Studies of 2195 Al-Li Alloy and 2219 Al Alloy with Differing Surface Treatments

    Science.gov (United States)

    Danford, M. D.; Mendrek, M. J.

    1998-01-01

    Corrosion studies of 2195 Al-Li and 2219 Al alloys have been conducted using the scanning reference electrode technique (SRET) and the polarization resistance (PR) technique. The SRET was used to study corrosion mechanisms, while corrosion rate measurements were studied with the PR technique. Plates of Al203 blasted, soda blasted and conversion coated 2219 Al were coated with Deft primer and the corrosion rates studied with the EIS technique. Results from all of these studies are presented.

  1. Stabilization of itinerant (band) magnetism in FeAl by Ga substitution for Al

    Energy Technology Data Exchange (ETDEWEB)

    Papaconstantopoulos, D. A.; Mazin, I. I.; Hathaway, K. B.

    2001-06-01

    Band structure calculations of FeGa{sub 1{minus}x}Al{sub x} have been performed, to further investigate the stability of ferromagnetism in FeAl. The Stoner parameter increases by about 20% at the FeGa end. This is also confirmed by our spin-polarized calculations. We conclude that Ga substitution for Al is likely to stabilize the elusive (or illusive) ferromagnetic state in FeAl. {copyright} 2001 American Institute of Physics.

  2. High temperature creep behaviour of Al-rich Ti-Al alloys

    Energy Technology Data Exchange (ETDEWEB)

    Sturm, D; Heilmaier, M; Saage, H [Otto von Guericke University Magdeburg, Institute for Materials and Joining Technology, PO Box 4120, D-39016 Magdeburg (Germany); Aguilar, J; Schmitz, G J; Drevermann, A [ACCESS e.V., Intzestrasse 5, D-52072 Aachen (Germany); Palm, M; Stein, F; Engberding, N [Max-Planck-Institut fuer Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Duesseldorf (Germany); Kelm, K; Irsen, S, E-mail: daniel.sturm@ovgu.d [Stiftung caesar, Electron Microscopy, Ludwig-Erhard-Allee 2, D-53175 Bonn (Germany)

    2010-07-01

    Compared to Ti-rich {gamma}-TiAl-based alloys Al-rich Ti-Al alloys offer an additional reduction of in density and a better oxidation resistance which are both due to the increased Al content. Polycrystalline material was manufactured by centrifugal casting. Microstructural characterization was carried out employing light-optical, scanning and transmission electron microscopy and XRD analyses. The high temperature creep of two binary alloys, namely Al{sub 60}Ti{sub 40} and Al{sub 62}Ti{sub 38} was comparatively assessed with compression tests at constant true stress in a temperature range between 1173 and 1323 K in air. The alloys were tested in the cast condition (containing various amounts of the metastable phases Al{sub 5}Ti{sub 3} and h-Al{sub 2}Ti) and after annealing at 1223 K for 200 h which produced (thermodynamically stable) lamellar {gamma}-TiAl + r-Al{sub 2}Ti microstructures. In general, already the as-cast alloys exhibit a reasonable creep resistance at 1173 K. Compared with Al{sub 60}Ti{sub 40}, both, the as-cast and the annealed Al{sub 62}Ti{sub 38} alloy exhibit better creep resistance up to 1323 K which can be rationalized by the reduced lamella spacing. The assessment of creep tests conducted at identical stress levels and varying temperatures yielded apparent activation energies for creep of Q = 430 kJ/mol for the annealed Al{sub 60}Ti{sub 40} alloy and of Q = 383 kJ/mol for the annealed Al{sub 62}Ti{sub 38} material. The latter coincides well with that of Al diffusion in {gamma}-TiAl, whereas the former can be rationalized by the instability of the microstructure containing metastable phases.

  3. HOMENAJE AL DOCTOR JORGE CAVELIER

    Directory of Open Access Journals (Sweden)

    Guillermo Rueda Montaña

    1979-06-01

    ósitos. Jamás concibió nada pequeño, ni en lo material, ni en lo espiritual. Su propio mundo de acción y movimiento, tallado a su imagen y semejanza, no le permitía detenerse en pequeñeces. Cabalgaba
    contra el tiempo, y este no le era suficiente para sus designios. Por eso no podía detenerse en minucias, jamás fue mediocre, ni toleró la mediocridad.

    JORGE CAVELIER pasa al Panteón de los grandes de Colombia, su excepcional condición humana así lo impone, sus valiosos servicios a la Patria así lo demandan, y el profundo rastro que deja de su paso por la vida, así lo decide.

    La CRUZ ROJA COLOMBIANA, que le debe casi todo, ya no será la misma. Será imposible ocupar el inmenso vacío que deja la desaparición del titán. Ocuparemos su sitio, mas no lo reemplazaremos.
    Como las criaturas del bosque milenario, permaneceremos silenciosos y cavilantes ante el majestuoso y doloroso espectáculo de su caída.

    Descanse en Paz.

  4. Computer aided cooling curve analysis for Al-5Si and Al-11Si alloys

    African Journals Online (AJOL)

    user

    Aluminium-Silicon (Al-Si) alloys are considered as the most important cast .... of MA1, the melt was stirred gently with zircon coated iron rod and was held for 5 min. ..... and mechanical properties of Al-7Si and Al-7Si-2.5Cu cast alloys, Materials ...

  5. Dakwah Kultural Bayt al-Qur’an al-Akbar Ukiran Kayu Khas Melayu Palembang

    Directory of Open Access Journals (Sweden)

    Reza Pahlevi

    2016-07-01

    Full Text Available Penelitian ini berusaha mengungkap berbagai fenomena yang menggambarkan serangkaian kegiatan dakwah kultural Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang. Sehingga dapat diperoleh sejumlah informasi mengenai berbagai upaya penerapan program yang dimaksud. Penelitian ini dapat disimpulkan, pertama kontribusi Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang terhadap perkembangan metode dakwah kultural adalah dakwah melalui seni. Kedua, Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang sebagai tempat Wisata Religi yang sangat signifikan.   This research tries to reveal the various phenomenon that describe a series of cultural propaganda activities Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang. In order to obtain some informations about the efforts of the implementation of the program in question. It can be concluded, the first contribution of Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang on the development of methods of cultural propaganda is propaganda through art. Second Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang as a very significant Religious Tourism.

  6. TA’WIL DALAM EPISTEMOLOGI ULUM AL-QUR’AN IMAM AL-GHAZALI

    Directory of Open Access Journals (Sweden)

    M. Muhsin

    2013-12-01

    Tafriqah dan Qanun al­Ta’wil menjawab adanya dugaan absennya pemikir an  al­Ghazali di bidang ‘Ulum al­Qur’an. Khusus dalam Fays al al­Tafriqah dan Qanun al­Ta’wil, ia membahas teori dan kaidah ta’wil. Dalam konsepsi al­Ghazali , bangunan dan struktur al­Qur’an terdiri dari ajaran kulit (al­ Sadf wa al­ Qasr, dan ajaran inti: rahasia (Asrar wa al­Jawhar. Demikian juga ilmu­ilmu al­Qur’an terdiri dari ilmu yang berkaitan dengan lapisan luar, ajaran kulit (al­Qasr; dan ilmu yang berkaitan dengan permata (ilmu Jawhar. Posisi al­Ghazali sebagai seorang sufi acapkali menjadikan hati sebagai ukuran dalam melakukan ta’wil. Di sisi lain, dia menyatakan bahwa ukuran penta’wilan adalah akal. Jika mengacu pada yang pertama, maka ta’wil al­Ghazali bercorak ta’wil batini; dan jika mengacu pada yang kedua ia bercorak ta’wil rasional. Bertolak pada latar belakang dan kegelisah an akademik tersebut, maka penelitian berfokus pada teori ta’wil al­Ghazali. Penelitian ini mennggunakan metode berfikir deduktif, dengan teori hermeneutika teoritis dan teori ta’wil. Hermeneutika teoritis di maksud kan untuk “membaca” dan “mengungkap secara obyektif” pemikiran al­Ghazali dibidang Ulum al­Qur’an, sedang alat yang akan digunakan untuk “menilai” teori ta’wil al­Ghazali adalah teori ta’wil. Berangkat dari teori ta’wil al­Ghazali yang bercorak rasional serta berada di bawah naungan teori keilmuannya yang bercorak sufistik, bisa dikatakan teori ta’wil nya merupakan teori ta’wil rasional batini. Itu terlihat dari prinsip ta’wilnya, yakni menjadikan akal sebagai pijakan penta’wilan; di sisi lain, pembagian al­Qur’an yang menjadi dua kategori zahir dan batin, baik pada sisi struktur ajarannya maupun sisi maknanya pada lafaz.

  7. Japanese version of the ALS-FTD-Questionnaire (ALS-FTD-Q-J).

    Science.gov (United States)

    Watanabe, Yasuhiro; Beeldman, Emma; Raaphorst, Joost; Izumi, Yuishin; Yoshino, Hiide; Masuda, Michihito; Atsuta, Naoki; Ito, Satoru; Adachi, Tadashi; Adachi, Yoshiki; Yokota, Osamu; Oda, Masaya; Hanashima, Ritsuko; Ogino, Mieko; Ichikawa, Hiroo; Hasegawa, Kazuko; Kimura, Hideki; Shimizu, Toshio; Aiba, Ikuko; Yabe, Hayato; Kanba, Makoto; Kusumi, Kimiyoshi; Aoki, Tetsuya; Hiroe, Yu; Watanabe, Hirohisa; Nishiyama, Kazutoshi; Nomoto, Masahiro; Sobue, Gen; Nakashima, Kenji

    2016-08-15

    Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) share common clinical, genetic and neuropathological features. Some ALS patients have behavioral/personality changes, which could result in significant obstacles in the care provided by family members and caregivers. An easy screening tool would contribute greatly to the evaluation of these symptoms. We translated the ALS-FTD-Questionnaire, developed in the Netherlands, into Japanese (ALS-FTD-Q-J) and examined the clinimetric properties (internal consistency, construct and clinical validity). Patients with ALS and/or behavioral variant FTD (bvFTD) were evaluated alongside healthy controls in this multicenter study. All ALS patients, regardless of bvFTD status, were further evaluated by the frontal behavioral inventory (FBI) and for frontal/executive function, cognition, anxiety/depression, and motor functions. Data from 146 subjects were analyzed: ALS (92), ALS-bvFTD (6), bvFTD (16), and healthy controls (32). The internal consistency of the ALS-FTD-Q-J was good (Cronbach α=0.92). The ALS-FTD-Q-J showed construct validity as it exhibited a high correlation with the FBI (r=0.79). However, correlations were moderate with anxiety/depression and low with cognitive scales, in contrast to the original report, i.e. a moderate correlation with cognition and a low correlation with anxiety/depression. The ALS-FTD-Q-J discriminated ALS patients from (ALS-)bvFTD patients and controls. Thus, the ALS-FTD-Q-J is useful for evaluating Japanese ALS/FTD patients.

  8. WAHDAT AL WUJUD DALAM PEMIKIRAN IBNU ARABI

    Directory of Open Access Journals (Sweden)

    Abd Halim Rofi'ie

    2013-09-01

    Full Text Available Ibnu Arabi, the Grand Master of Islam, is a great thinker whose controversial thought, wahdat al-wujud, has significantly influenced the mystiques of Islam. The meaning of wahdat al-wujud is basically two folds, i.e. that Being is the only One which exists and that the universe is merely a manifestation of the One. The One Being here refers to Allah SWT. The One covers up all the existing phenomena and functions as a resource which emanates the entire universe. In this context, He is referred to as al-Haqiqat al-Muhammadiyah. He might also be viewed as both the Universal Soul for His being the source of cosmos that governs the universe and the Universal Body for His reflecting any actions on every single micro existence that forms the universe. Furthermore, when His existence is deemed as a jauhar (jewel that face-up any occurrences, He is typically known as al-haba’. The concept of wahdat al-wujud can actually be simplified into the principle of laa maujuda illa wujud al-wahid (no existence except the Existing One, the Being. The One might reveal His own existence into different martabat or levels: Martabat Ahadiyah, Martabat Wahidiyah, and Martabat Tajalli Syuhudi. Those standing points trigger Ibnu Arabi to believe that any kinds of realities or existences are nothing but a true reflection of the One.

  9. Thermal diffusion in Ni/Al multilayer

    Energy Technology Data Exchange (ETDEWEB)

    Swain, M.; Bhattacharya, D.; Singh, S.; Basu, S. [Solid State Physics Division, Bhabha Atomic Research Center, Mumbai 400085 (India); Gupta, M. [UGC-DAE-Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452017 (India)

    2013-02-05

    Two Ni/Al multilayers deposited by ion beam sputtering of nominal design [Ni(200A)/Al(100A)] Multiplication-Sign 5 and [Ni(50A)/Al(227A)] Multiplication-Sign 5 on Si substrates were annealed at 200 Degree-Sign C. As-deposited and annealed samples were characterized by x-ray diffraction (XRD) and x-ray reflectometry (XRR). The effort was to study the path of alloying in the above two multilayers of same elements but of opposite stoichiometric ratio. We find distinct differences in alloying of these samples.

  10. The Ni-Al-Hf Multiphase Diffusion

    Directory of Open Access Journals (Sweden)

    Romanowska J.

    2016-06-01

    Full Text Available The generalized Darken method was applied to simulate the diffusion between γ-Ni| γ’-Ni3Al and γ’-Ni3Al|β-NiAl interfaces. The results of calculations were compared with the experimental concentration’s profiles of nickel, aluminum and hafnium in aluminide and hafnium doped aluminide coatings deposited by the CVD and PVD methods on pure nickel. The method deals with the Wagner’s integral diffusion coefficients and thermodynamic data - activities of components. The experimental results agree with the simulated ones.

  11. Indigencia y marginalidad en al-Andalus

    OpenAIRE

    Carballeira Debasa, Ana María

    2006-01-01

    [ES]Este trabajo analiza la actitud que los andalusíes adoptaron hacia los pobres e indigentes en el marco cronológico comprendido entre los siglos VIII-XII, tomando como base documental las fuentes históricas y biográficas de al-Andalus. Un examen minucioso de los datos contenidos en la documentación consultada proporciona una visión nada desdeñable que permite arrojar luz sobre algunas cuestiones que se pueden plantear respecto al tema de la marginación e integración de los pobres en al-And...

  12. Ni{sub 3}Al aluminide alloys

    Energy Technology Data Exchange (ETDEWEB)

    Liu, C.T.

    1993-10-01

    This paper provides a brief review of the recent progress in research and development of Ni{sub 3}Al and its alloys. Emphasis has been placed on understanding low ductility and brittle fracture of Ni{sub 3}Al alloys at ambient and elevated temperatures. Recent studies have resulted in identifying both intrinsic and extrinsic factors governing the fracture behavior of Ni{sub 3}Al alloys. Parallel efforts on alloy design using physical metallurgy principles have led to properties for structural use. Industrial interest in these alloys is high, and examples of industrial involvement in processing and utilization of these alloys are briefly mentioned.

  13. Juan Goytisolo en al aule de ELE

    OpenAIRE

    Zubia Fernandez, Daniel

    2004-01-01

    Al integrar en el aula de ELE artículos periodísticos sobre un determinado escritor como una práctica de expresión oral y escrita, se aproxima al alumno principiante de ELE al universo literario del autor escogido con el propósito de entrelazar la enseñanza de la lengua y la de la(s) literatura(s) en lengua española. Con este enfoque se estimula la capacidad lectora del alumno en la lengua meta ya que los textos periodísticos constituyen modelos ejemplares para este propósito d...

  14. Morphology of AlN whiskers grown by reacting N2 gas and Al vapor

    Science.gov (United States)

    Matsumoto, M.; Saitou, H.; Takeuchi, Y.; Harada, S.; Tagawa, M.; Ujihara, T.

    2017-06-01

    We have investigated the morphology of AlN whiskers on a polycrystalline AlN substrate by using Fe-Al alloy melts under the different synthesis conditions. Formation density of the AlN whiskers increases and the diameter of the whisker decreases with increasing Al content of the Fe-Al alloy melt. Most of the AlN whiskers were zigzag shape with the hexagonal cross section. The longitudinal direction was the [0001] direction. The facet with the zigzag shape was the {1 1 bar 01} or {1 1 bar 0 1 bar } pyramidal plane and the period of the zigzag facet was almost constant. The average diameter of the whiskers and the period of the zigzag facet decrease with increasing Al content. At the initial stage of the whisker formation, the island of AlN formed on the AlN substrate and the pyramidal facet grows via step-flow growth. From the observation, we discussed the possible mechanism for the formation of the zigzag-shape AlN whiskers.

  15. Characterization of different-Al-content AlGaN/GaN heterostructures on sapphire

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Al x Ga 1-x N/GaN high-electron-mobility transistor (HEMT) structures with Al composition ranging from x = 0.13 to 0.36 are grown on sapphire substrates by low-pressure metalorganic chemical vapor deposition (LP-MOCVD). The effects of Al content on crystal quality, surface morphology, optical and electrical characteristics of the AlGaN/GaN heterostructures have been analyzed. Although high Al-content (36%) heterostructure exhibits a distinguished photoluminescence peak related to recombination between the two-dimensional electron gas and photoexcited holes (2DEG-h), its crystal quality and rough surface morphology are poor. 2DEG mobility increases with the Al content up to 26% and then it apparently decreases for high Al-content (36%) AlGaN/GaN heterostructure. The increase of sheet carrier density with the increase of Al content has been observed. A high mobility at room temperature of 2105 cm 2 /V s with a sheet carrier density of n s = 1.10 × 10 13 cm -2 , for a 26% Al-content AlGaN/GaN heterostructure has been obtained, which is approaching state-of-the-art for HEMT grown on SiC. Sheet resistance as low as 274 Ω/□ has also been achieved.

  16. Tracing Al Shabaab’s Decision to Cooperate with Al Qaeda in Somalia (2008

    Directory of Open Access Journals (Sweden)

    Adlini Ilma Ghaisany Sjah

    2014-02-01

    Full Text Available 'Al Shabaab, a Somali insurgent with predominantly nationalistic causes (alongside transnational [global Jihad] and Islamic goals made the choice to fight on behalf of Al Qaeda in 2008. The decision to do so contrasted with Al Shabaab’s previous behaviour of actively denying cooperation and distancing itself from Al Qaeda. This study aims to uncover factors that contributed to Al Shabaab’s decision through the use of process-tracing. The results show that Al Shabaab’s declaration of cooperation with Al Qaeda in August 2008 was brought about by a series of events that traced back to four factors: public reactions to the implementation of a Salafi ideology, the shift to a radical leadership, Al Shabaab’s inability to maintain stability in areas under its control and its increasing attacks by Al Shabaab on the Somali public. Al Shabaab pursued cooperation with Al Qaeda after realizing that their nationalistic preference was no longer achievable in the near future.' ' '

  17. Some aspects of anelastic and microplastic creep of pure Al and two Al-alloys

    Energy Technology Data Exchange (ETDEWEB)

    Sgobba, S. (Lab. de Metallurgie Mecanique, Dept. des Materiaux, Ecole Polytechnique Federale de Lausanne (Switzerland)); Kuenzi, H.U. (Lab. de Metallurgie Mecanique, Dept. des Materiaux, Ecole Polytechnique Federale de Lausanne (Switzerland)); Ilschner, B. (Lab. de Metallurgie Mecanique, Dept. des Materiaux, Ecole Polytechnique Federale de Lausanne (Switzerland))

    1993-11-01

    Anelastic creep of pure Al, commercial Al-Cu and a binary Al-Cu alloy has been measured at room temperature by means of a high resolution laser interferometer. The irreversible component of the deformation was also quantified from measurements of the anelastic creep recovery. The dependence of the deformation-time curves on thermal treatment and cold work is analyzed. The mechanisms responsible for the room temperature anelastic creep are discussed. Materials loaded below their elastic limit can present either a pure anelastic behavior (commercial Al-Cu) or additional viscoelastic creep (pure Al, high purity Al-Cu). For commercial Al-Cu, the presence of an irreversible deformation appears to be mainly related to the state of the surface. A viscoelastic after effect has been measured for this alloy after a Cu-electroplating treatment. As a typical result for room temperature creep, the irreversible deformation depends logarithmically on load time. (orig.).

  18. Preparation and Mechanical Properties of Al2O3/Al Laminated Ceramic Matrix Composites

    Institute of Scientific and Technical Information of China (English)

    HUANG Kangming; LI Weixin; XIE Binhuan; RAO Pinggen; PENG Cheng; CHEN Dabo; WU Jianqing

    2011-01-01

    Three series of Al2O3/Al laminated ceramic matrix composites,named SPA,SPV and HP,were fabricated by different methods.SPA and SPV were prepared using Al2O3 slices and Al slurry via screen printing and subsequent heat treatment in air or vacuum.HP samples were made by hot pressing the layered stack of Al foils and Al2O3 slices.SEM and XRD were applied to analyze the microstructure and the interlayer crystal phase.The bending strength,fracture toughness and fracture work of the samples made by the three methods were measured and compared.The results show that the composites have much better toughness and higher fracture work than the Al2O3 slice.Among the samples made by the three methods,the samples made by hot pressing have the optimum mechanical performance.The displacement-load curves and fracture mechanism were analyzed.

  19. InAlN/AlN/GaN heterostructures for high electron mobility transistors

    Science.gov (United States)

    Usov, S. O.; Sakharov, A. V.; Tsatsulnikov, A. F.; Lundin, V. W.; Zavarin, E. E.; Nikolaev, A. E.; Yagovkina, M. A.; Zemlyakov, V. E.; Egorkin, V. I.; Ustinov, V. M.

    2016-08-01

    The results of development of InAlN/AlN/GaN heterostructures, grown on sapphire substrates by metal-organic chemical vapour deposition, and high electron mobility transistors (HEMTs) based on them are presented. The dependencies of the InAlN/AlN/GaN heterostructure properties on epitaxial growth conditions were investigated. The optimal indium content and InAlN barrier layer thicknesses of the heterostructures for HEMT s were determined. The possibility to improve the characteristics of HEMTs by in-situ passivation by Si3N4 thin protective layer deposited in the same epitaxial process was demonstrated. The InAlN/AlN/GaN heterostructure grown on sapphire substrate with diameter of 100 mm were obtained with sufficiently uniform distribution of sheet resistance. The HEMTs with saturation current of 1600 mA/mm and transconductance of 230 mS/mm are demonstrated.

  20. 78 FR 4967 - Alabama Disaster #AL-00046

    Science.gov (United States)

    2013-01-23

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Alabama Disaster AL-00046 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY... adversely affected by the disaster: Primary Counties: Mobile; Pike. Contiguous Counties: Alabama:...

  1. Pike International, LLC et al. Information Sheet

    Science.gov (United States)

    Pike International LLC, et al. (the Company) is located in New Haven, Connecticut. The Complaint involves the lease of, and renovation activities conducted at, property constructed prior to 1978, located in New Haven, Connecticut.

  2. Smoking Tied to Shorter Survival with ALS

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_161094.html Smoking Tied to Shorter Survival With ALS Tobacco use ... 22, 2016 WEDNESDAY, Sept. 21, 2016 (HealthDay News) -- Smoking may speed progression of Lou Gehrig's disease and ...

  3. Thermal Conductivity of Al-Salt Composites

    Science.gov (United States)

    Li, Peng; Zhang, Mei; Wang, Lijun; Seetharaman, Seshadri

    2015-11-01

    With a view to examine the possibility of estimating the content of entrapped metallic aluminium in the salt cake from aluminium remelting, the thermal diffusivity of reference composites of KCl-NaCl-Al was measured as a function of aluminium metal content at room temperature. The thermal conductivity of the reference composites was found to increase with the metallic Al content. The lumped parameter model approach was carried out to discuss the influence of different geometry arrangements of each phase, viz. air, salts and metallic aluminium on the thermal conductivity. Application of the present results to industrial samples indicates that factors such as the interfacial condition of metallic Al particles have to be considered in order to estimate the amount of entrapped Al in the salt cake.

  4. Rogue Genes May Cause Some ALS Cases

    Science.gov (United States)

    ... https://medlineplus.gov/news/fullstory_166795.html Rogue Genes May Cause Some ALS Cases Most people with ... 21, 2017 WEDNESDAY, June 21, 2017 (HealthDay News) -- Gene mutations may cause up to 17 percent of ...

  5. The Y-Ag-Al system

    Energy Technology Data Exchange (ETDEWEB)

    Gumenyuk, T.M.; Kuz' ma, Yu.B.; Stel' makhovych, B.M. [L' vov State Univ. (Ukraine). Dept. of Anal. Chem.

    2000-03-14

    The interaction between the components in the Y-Ag-Al system at 870 K has been studied using X-ray analysis. The phase diagram in the region up to 50 at.% of yttrium has been constructed. The limits of the solid solution regions of the binary compounds and the homogeneity ranges of the ternary ones have been determined. The crystal structures of the ternary aluminides Y{sub 3}Ag{sub 2}Al{sub 7} (Ca{sub 3}Cu{sub 2}Al--type structure, space group R anti 3m, a=0.55422(2), c=2.6259(1) nm) and YAg{sub 0.6}Al{sub 1.4} (KHg{sub 2}-type structure, space group Imma, a=0.45399(2), b=0.71551(3), c=0.78712(4) nm) have been studied for the first time. (orig.)

  6. Calcium platinum aluminium, CaPtAl

    Directory of Open Access Journals (Sweden)

    Charles Fon Abi

    2011-10-01

    Full Text Available A preliminary X-ray study of CaPtAl has been reported previously by Hulliger [J. Alloys Compd (1993, 196, 225–228] based on X-ray powder diffraction data without structure refinement. With the present single-crystal X-ray study, we confirm the assignment of the TiNiSi type for CaPtAl, in a fully ordered inverse structure. All three atoms of the asymmetric unit have .m. site symmetry. The structure features a ∞3[AlPt] open framework with a fourfold coordination of Pt by Al atoms and vice versa. The Ca atoms are located in the large channels of the structure.

  7. Existe realmente la adiccion al sexo?

    National Research Council Canada - National Science Library

    Echeburua, Enrique

    2012-01-01

    .... La adiccion al sexo se aplica a personas que muestran conductas parafilicas o no parafilicas relacionadas con situaciones de riesgo, con una escalada en el tipo de conductas sexuales (tolerancia...

  8. Recrystallization of Al-Sc alloys

    Energy Technology Data Exchange (ETDEWEB)

    Drits, M.E.; Toropova, L.S.; Bykov, Yu.G.; Ber, L.B.

    Scandium effect on the temperature range of aluminium recrystallization was investigated. Al-Sc alloys were studied under cold rolled and hot pressed conditions. It is found that the temperature range of Al-Sc alloy recrystallization depends on ScAl/sub 3/ particle dispersion during recrystallization heats. During heating in quenched alloys at 200-300 deg C decomposition occurs which prevents recrystallization, In the alloys with scandium contents less 0.2% decomposition and recrystallization processes pass simultaneously. In quenched alloys with scandium contents over 0.2% and in aged alloys the initiation and subsequent development of recrystallization are determined by the processes of coalescence and solution of ScAl/sub 3/ phase particles.

  9. Del latín al rumano

    Directory of Open Access Journals (Sweden)

    Montes Giraldo José Joaquín

    2003-06-01

    Full Text Available

    Marius Sala, Del latín al rumano. Versión española de Valeria Neagu, París, Unión Latina - Bucarest, Univers enciclopedic, 2002. El texto se dirige al lector corriente, no especialista, y por eso el aparato técnico-bibliográfico no se presenta en el curso de la exposición.

  10. Are RENiAl hydrides metallic?

    Energy Technology Data Exchange (ETDEWEB)

    Eichinger, Karl; Havela, Ladislav; Prokleska, Jan; Stelmakhovych, Olha; Danis, Stanislav [Faculty of Mathematics and Physics, Charles Univ., Prague (Czech Republic); Santava, Eva [Inst. of Physics ASCR, Prague (Czech Republic); Miliyanchuk, Khrystyna [Dept. of Inorganic Chemistry, Ivan Franko National Univ. of Lviv (Ukraine)

    2009-09-15

    Due to hydrogenation, the crystal structure of GdNiAl distorts from hexagonal to orthorhombic. The magnetic ordering temperature decreases dramatically and the magnetic entropy of this phase transition is in good agreement with theory. LuNiAl does not change its structure type, but it was found that the electronic contribution to specific heat decreases dramatically. None of the two phases loses its metallic character. (orig.)

  11. In Situ Fabrication of AlN Coating by Reactive Plasma Spraying of Al/AlN Powder

    Directory of Open Access Journals (Sweden)

    Mohammed Shahien

    2011-10-01

    Full Text Available Reactive plasma spraying is a promising technology for the in situ formation of aluminum nitride (AlN coatings. Recently, it became possible to fabricate cubic-AlN-(c-AlN based coatings through reactive plasma spraying of Al powder in an ambient atmosphere. However, it was difficult to fabricate a coating with high AlN content and suitable thickness due to the coalescence of the Al particles. In this study, the influence of using AlN additive (h-AlN to increase the AlN content of the coating and improve the reaction process was investigated. The simple mixing of Al and AlN powders was not suitable for fabricating AlN coatings through reactive plasma spraying. However, it was possible to prepare a homogenously mixed, agglomerated and dispersed Al/AlN mixture (which enabled in-flight interaction between the powder and the surrounding plasma by wet-mixing in a planetary mill. Increasing the AlN content in the mixture prevented coalescence and increased the nitride content gradually. Using 30 to 40 wt% AlN was sufficient to fabricate a thick (more than 200 µm AlN coating with high hardness (approximately 1000 Hv. The AlN additive prevented the coalescence of Al metal and enhanced post-deposition nitriding through N2 plasma irradiation by allowing the nitriding species in the plasma to impinge on a larger Al surface area. Using AlN as a feedstock additive was found to be a suitable method for fabricating AlN coatings by reactive plasma spraying. Moreover, the fabricated coatings consist of hexagonal (h-AlN, c-AlN (rock-salt and zinc-blend phases and certain oxides: aluminum oxynitride (Al5O6N, cubic sphalerite Al23O27N5 (ALON and Al2O3. The zinc-blend c-AlN and ALON phases were attributed to the transformation of the h-AlN feedstock during the reactive plasma spraying. Thus, the zinc-blend c-Al

  12. Line shape diagnostics of Galactic 26Al

    CERN Document Server

    Kretschmer, K; Hartmann, D H

    2003-01-01

    The shape of the gamma-ray line from radioactive 26Al, at 1808.7 keV energy in the frame of the decaying isotope, is determined by its kinematics when it decays, typically 10^6 y after its ejection into the interstellar medium from its nucleosynthesis source. Three measurements of the line width exist: HEAO-C's 1982 value of (0+3) keV FWHM, the GRIS 1996 value of (5.4 +/- 1.3) keV FWHM, and the recent RHESSI value of (2.0 +/- 0.8) keV FWHM, suggesting either "cold", "hot", or "warm" 26Al in the ISM. We model the line width as expected from Galactic rotation, expanding supernova ejecta, and/or Wolf-Rayet winds, and predict a value below 1 keV (FWHM) with plausible assumptions about 26Al initial velocities and expansion history. Even though the recent RHESSI measurement reduces the need to explain a broad line corresponding to 540 km/s mean 26Al velocity through extreme assumptions about grain transport of 26Al or huge interstellar cavities, our results suggest that standard 26Al ejection models produce a line ...

  13. Radicais livres de oxigênio e exercício: mecanismos de formação e adaptação ao treinamento físico Radicales libres de oxigeno y ejercicio: mecanismos de formación y adaptación al entrenamiento Oxygen free radicals and exercise: mechanisms of synthesis and adaptation to the physical training

    Directory of Open Access Journals (Sweden)

    Cláudia Dornelles Schneider

    2004-08-01

    pelo treinamento físico.El interés a cerca de los mecanismos de generación y adaptación de radicales libres de oxígeno (RLO al ejercicio aumentó significativamente a partir de la demostración de su relación con el consumo de oxígeno. Los RLO son formados por la reducción incompleta de del oxígeno, generando especies que presentan una alta reactividad para otras biomoléculas, principalmente lípidos y proteínas de las membranas celulares y, así mismo, el DNA. Las injurias provocadas por el estrés oxidativo presentan efectos acumulativos y están relacionados a una serie de enfermedades, como el cáncer, la arteriosclerosis o la diabetes. El ejercicio físico agudo, en función del incremento del consumo de oxígeno promueve un aumento en la formación de los RLO. No en tanto, el entrenamiento físico es capaz de generar adaptaciones capaces de mitigar los efectos deletéreos provocados por los RLO. Estas adaptaciones están relacionadas a una serie de sistemas de los cuales los mas importantes son los sistemas enzimáticos, compuestos por la peróxido dismutasa, catalasa y glutation peroxidasa y los sistemas no enzimáticos compuestos por ceruloplasmina, hormonas sexuales, la coenzima Q, ácido úrico, proteínas de choque térmico, y otros. Tales adaptaciones, a pesar de las controversias sobre los mecanismos comprendidos, promueven una mayor resistencia tisular a los desafíos oxidativos, como son aquellos proporcionados por el ejercicio físico de alta intensidad y de larga duración. Las técnicas de evaluación del estrés oxidativo, la mayoría de las veces, no son capaces de detectar injurias en ejercicios de corta duración. De esta forma, los esfuerzos están siendo realizados por largos periodos de tiempo o realizados hasta la extenuación. Nuevos marcadores de lesión por acción de los RLO están siendo descubiertos y nuevas técnicas para su determinación están siendo creadas. El objetivo de este trabajo es discutir los mecanismos de

  14. Thermodynamics and surface properties of liquid Al-Ga and Al-Ge alloys

    Energy Technology Data Exchange (ETDEWEB)

    Anusionwu, B.C. [Abdus Salam Int. Centre for Theoretical Physics, Trieste (Italy); Federal University of Technology, Department of Physics, Owerri (Nigeria); Adebayo, G.A. [Abdus Salam Int. Centre for Theoretical Physics, Trieste (Italy); University of Agriculture, Department of Physics, Abeokuta (Nigeria); Madu, C.A. [Federal University of Technology, Department of Physics, Owerri (Nigeria)

    2009-11-15

    The surface properties of Al-Ga and Al-Ge liquid alloys have been theoretically investigated at a temperature of 1100 K and 1220 K respectively. For the Al-Ga system, the quasi chemical model for regular alloy and a model for phase segregating alloy systems were applied, while for the Al-Ge system the quasi chemical model for regular and compound forming binary alloys were applied. In the case of Al-Ga, the models for the regular alloys and that for the phase segregating alloys produced the same value of order energy and same values of thermodynamic and surface properties, while for the Al-Ge system, the model for the regular alloy reproduced better the thermodynamic properties of the alloy. The model for the compound forming systems showed a qualitative trend with the measured values of the thermodynamic properties of the Al-Ge alloy and suggests the presence of a weak complex of the form Al{sub 2}Ge{sub 3}. The surface concentrations for the alloys show that Ga manifests some level of surface segregation in Al-Ga liquid alloy while the surface concentration of Ge in Al-Ge liquid alloy showed a near Roultian behavior below 0.8 atomic fraction of Ge. (orig.)

  15. Thermodynamics and surface properties of liquid Al-Ga and Al-Ge alloys

    Science.gov (United States)

    Anusionwu, B. C.; Adebayo, G. A.; Madu, C. A.

    2009-11-01

    The surface properties of Al-Ga and Al-Ge liquid alloys have been theoretically investigated at a temperature of 1100 K and 1220 K respectively. For the Al-Ga system, the quasi chemical model for regular alloy and a model for phase segregating alloy systems were applied, while for the Al-Ge system the quasi chemical model for regular and compound forming binary alloys were applied. In the case of Al-Ga, the models for the regular alloys and that for the phase segregating alloys produced the same value of order energy and same values of thermodynamic and surface properties, while for the Al-Ge system, the model for the regular alloy reproduced better the thermodynamic properties of the alloy. The model for the compound forming systems showed a qualitative trend with the measured values of the thermodynamic properties of the Al-Ge alloy and suggests the presence of a weak complex of the form Al2Ge3. The surface concentrations for the alloys show that Ga manifests some level of surface segregation in Al-Ga liquid alloy while the surface concentration of Ge in Al-Ge liquid alloy showed a near Roultian behavior below 0.8 atomic fraction of Ge.

  16. Corrosion behavior of solid solution (Ti,Al)N as a function of Al concentration

    Energy Technology Data Exchange (ETDEWEB)

    Larijani, M.M.; Seyedi, H. [Nuclear Science and Technology Research Institute, P. O. Box 31485-498, Karaj (Iran, Islamic Republic of); Manouchehrian, M. [Department of Physics, Science Faculty, South Tehran Branch, Islamic Azad University, Tehran (Iran, Islamic Republic of); Yari, M. [Engineering Department Materials, Science and Research Branch, Islamic Azad University, Tehran (Iran, Islamic Republic of)

    2012-08-15

    In this work, a series of (Ti, Al) N coatings with different Al contents were deposited on 304 stainless steel substrates by Hollow Cathode Discharge (HCD) method. The coatings were grown on 304 stainless steel substrates at 400 C. The coatings were characterized using energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), atomic force microscopy (AFM), and microhardness test. The XRD confirmed the transition from TiN phase to (Ti, Al) N phase and then to AlN phase with increasing Al concentration in the solid solution. It was found that with increasing Al concentration the hardness of the coatings initially increased up to a maximum value of about 30 GPa at around 32 at.% of Al and then the coating hardness decreased rapidly with further increase of Al content (Al > 32 at.%). The potentiodynamic polarization analysis was carried out in 3.5 wt.% NaCl solutions to study the corrosion resistance of the coatings. From the corrosion test it can be inferred that the amount of Al atoms in the coatings plays an important role for reducing the corrosion. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  17. Heterogeneous nucleation of solid Al from the melt by Al 3 Ti : Molecular dynamics simulations

    KAUST Repository

    Wang, Junsheng

    2010-10-27

    It has been known experimentally for some time that Al3 Ti is a powerful nucleant for the solidification of aluminum from the melt; however, a full microscopic understanding is still lacking. To develop this understanding, we have performed molecular dynamics simulations of the nucleation and early stages of growth using published embedded atom method potentials for Al-Ti, but modified by us to stabilize the D 022 structure. We discover that Al3 Ti can indeed be very effective in promoting the growth of solid Al but the manner in which growth takes place depends sensitively on the surface on which the Al nucleates. In particular, complete growth of solid Al from the liquid on the (001) and (110) surfaces of Al3 Ti occurs at a lower temperature than on the (112) surface. This anisotropy agrees with observations in previous experiments. We explain this observation in terms of interfacial energies. On the preferential (111) surface of Al the solid-liquid interfacial energy is highest while the solid-vacuum energy is lowest. Our simulations also show that the extent of ordering taking place in liquid Al close to the Al 3 Ti substrate above the melting point correlates well with the effectiveness of the substrate as a nucleant below the melting temperature: this could provide a computationally efficient scheme to identify good nucleants. © 2010 The American Physical Society.

  18. Ultrafine-grained Al composites reinforced with in-situ Al{sub 3}Ti filaments

    Energy Technology Data Exchange (ETDEWEB)

    Krizik, Peter, E-mail: peter.krizik@savba.sk [Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Racianska 75, 83102 Bratislava (Slovakia); Balog, Martin; Nosko, Martin [Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Racianska 75, 83102 Bratislava (Slovakia); Riglos, Maria Victoria Castro [Centro Atómico Bariloche, Av. Bustillo 9500 (8400) Bariloche, Río Negro (Argentina); Dvorak, Jiri [CEITEC-IPM, Institute of Physics of Materials, ASCR, Zizkova 22, 61662 Brno (Czech Republic); Bajana, Oto [Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Racianska 75, 83102 Bratislava (Slovakia)

    2016-03-07

    Ultrafine-grained (UFG) Al matrix composites reinforced with 15 and 30 vol% in-situ Al{sub 3}Ti filaments were fabricated by extrusion of Al–Ti powder mixtures followed by solid-state reactive diffusion. Fine Al powder particles (1.3 µm) heavily deformed the coarser Ti particles (24.5 µm) into filaments during extrusion. Upon a subsequent operation of hot isostatic pressing (HIP), the micrometric Al{sub 3}Ti filaments elongated along the extrusion direction and formed in situ in the UFG Al matrix. Fabricated composites are free of pores and voids with perfect bonding created at the Al–Al{sub 3}Ti interfaces. In parallel, a small portion (2.4 vol%) of nanoscale γ-Al{sub 2}O{sub 3} particles, which originate from native amorphous films on fine Al powders, formed in situ and were homogenously dispersed in the Al matrix. The microstructures of as-extruded and after HIP composites were analyzed by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive spectrometry (EDS) and electron back-scattered diffraction (EBSD). Owing to the presence of nanometric γ-Al{sub 2}O{sub 3} particles with Al high angle grain boundaries (HAGBs), the UFG Al matrix remained stable even after HIP at 600 °C for 9 h. The mechanical properties and creep performance of composites at testing temperatures of up to 600 °C were systematically studied. The Al–Al{sub 3}Ti composites exhibited a combination of increased strength and Young’s modulus in addition to excellent creep performance and structural stability, which indicates that the studied composites are potential structural materials capable of service at elevated temperatures.

  19. Phase relationships in the Al-rich region of the Al-Cu-Er system

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Ligang, E-mail: Ligang.Zhang@vtc.tu-freiberg.de [School of Material Science and Engineering, Central South University, Lushan Street 105, Changsha, Hunan 410083 (China); Freiberg University of Mining and Technology, Centre for Innovation Competence Virtuhcon, Fuchsmuehlenweg 9, D-09596 Freiberg (Germany); Science Center for Phase Diagram and Materials Design and Manufacture, Central South University, Changsha 410083 (China); Masset, Patrick J. [Freiberg University of Mining and Technology, Centre for Innovation Competence Virtuhcon, Fuchsmuehlenweg 9, D-09596 Freiberg (Germany); Cao Fuyong [School of Material Science and Engineering, Central South University, Lushan Street 105, Changsha, Hunan 410083 (China); Meng Fangui [School of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004 (China); Liu Libin, E-mail: PDC@mail.csu.edu.cn [School of Material Science and Engineering, Central South University, Lushan Street 105, Changsha, Hunan 410083 (China); Science Center for Phase Diagram and Materials Design and Manufacture, Central South University, Changsha 410083 (China); Jin Zhanpeng [School of Material Science and Engineering, Central South University, Lushan Street 105, Changsha, Hunan 410083 (China); Science Center for Phase Diagram and Materials Design and Manufacture, Central South University, Changsha 410083 (China)

    2011-03-03

    Research highlights: > One ternary phase {tau}{sub 1}-Al{sub 8}Cu{sub 4}Er in Al-rich region with a composition of 59.4-60.4 at.% Al, 32.2-33.8 at.% Cu, and 6.4-7.7 at.% Er is observed in both as-cast and annealed alloys. At 673 K, the binary Al{sub 3}Er phase dissolves about 3.51 at.% Cu. > The calculated solidification paths (based on the CALPHAD method) of as-cast alloys are in agreement with the experimental results. > It can be found that the resultant thermodynamic database can be applied to case studies of as-cast alloys, showing that the literature thermodynamic description of the Al-Cu-Er system is reliable as a working basis for computer-assisted alloy design. - Abstract: The Al-rich region of the ternary Al-Cu-Er system is investigated using the method of X-ray diffraction, scanning electron microscopy with energy dispersive X-ray spectroscopy. Phase equilibria in the Al-rich region of the Al-Cu-Er system at 673 K have been obtained, and the microstructures of as-cast alloys in the Al-rich region are also investigated. One ternary phase {tau}{sub 1}-Al{sub 8}Cu{sub 4}Er with a composition of 59.4-60.4 at.% Al, 32.2-33.8 at.% Cu, and 6.4-7.7 at.% Er is observed in both as-cast and annealed alloys. At 673 K, the binary Al{sub 3}Er phase dissolves about 3.51 at.% Cu. The calculated solidification paths (based on the CALPHAD method) of as-cast alloys are in agreement with the experimental results.

  20. Al4C3 Hydration Thermochemical Analysis for Burned Carbon-containing Refractories with Al

    Institute of Scientific and Technical Information of China (English)

    YANG Ding'ao; YU Zhiming; FAN Liuwu

    2003-01-01

    In this paper, X-ray diffractogram analysis and SEM observation of Al4 C3 formed at high temperature from carbon-containing refractories with Al have been carried out.Aluminum added to carbon-containing refractories reacts with C(s)to form Al4 C3(s) gradually during heating from 600 ℃ to 1200℃.It is considered that the interlocked structure of Al4 C3 plate crystals promotes the outstanding increase of hot modulus of rupture of carbon-containing refractories with Al. The HMOR of carbon-containing refractories added with Al additive from 0 to 5wt% increases by 2.8 times being from 6.5MPa to 18.2MPa.After a thermochemical calculation for hydration reaction processes of Al4 C3 and H2O(g), the equilibrium partial pressure chart of H2O(g)in H2O-Al4C3-Al(OH)3 system vs various temperatures has been attained . The H2O (g) partial pressure in the air needed for the Al4 C3 hydration reaction is no more than 10~18 atm at the temperature below 120℃.It is considered that the burned carbon-containing refractories with Al is extremely easy to hydrate and the cracking of burned carbon-containing refractories is generated because that the hydration expansion is 2.11 times during transforming from Al4 C3 to Al(OH)3.The fundamental measure against hydration of the refractories is to insulate the refractories from H2O(g)by various means such as pitch impregnation or other sealing materials.

  1. Prinsip Pendidikan Karakter dalam Islam: Studi Komparasi Pemikiran Al-Ghazali dan Burhanuddin Al-Zarnuji

    Directory of Open Access Journals (Sweden)

    Agus Setiawan

    2014-06-01

    Full Text Available The impelemtantion of character education that is done by the Indonesian government recently has been provoked by al-Ghazali and Burhanuddin al-Zarnuji long ago. It was proven by some written thoughts of al-Ghazali and Burhanuddin al-Zarnuji. They were very famous scientists in their era and widely welknown as educational experts who produced some phenomenal thoughts many people use today. Al-Ghazali and Burhanuddin al-Zarnuji lived in the era of Bani Abbasiyah monarchy, but Both of them lived in different era. Al-Ghazali was born first, then Burhanuddin al-Zarnuji. They had different mazhab, al-Ghazali went to the traditional principle of mazhab Syafi’I and Burhanuddin al-Zarnuji went to the modern principle of mazhab Hanafi. The differences, of course, would create a different thought. Still, they might have a similar principle of Islamic character education. The thoughts of character education of al-Ghazali have been poured in the “Ayyuha Walad” focusing to the students’ character building characterized by religiously obedient, skillfull of general and religious knowledge, socially helpful, affectionate, generous, good citizen, and coloring the society. Some applicable thoughts of character education of Ayyuha al-Walad of al-Gazhali to the contemporary education are: the balance of the happiness purposes of the recent life and the life after death, qana’ah and tawakal, affectionate, caring other, patience, honesty, philanthrophy, social works, generousity, democratic, peace makers, and patriotic. Those characters are also directed in the islamic character education nowdays. So that, the thoughts of al-Ghazali positively and responsively are absorbed by the Indonesian government to build the national character widely implementing in the national curriculum based on the local wisdom and the Islamic values. In the end, the students are able to live happily based on the Islamic rules by implementing the good behavior. Similar to the al

  2. Superconductivity in Al/Al{sub 2}O{sub 3} interface

    Energy Technology Data Exchange (ETDEWEB)

    Palnichenko, A.V., E-mail: paln@issp.ac.ru; Vyaselev, O.M.; Mazilkin, A.A.; Khasanov, S.S.

    2016-06-15

    Highlights: • Al/Al{sub 2}O{sub 3} interface was formed by surface oxidation of Al foil. • Magnetic susceptibility and electrical resistance of the interface was studied. • Superconductivity at ∼ 65 K of the Al/Al{sub 2}O{sub 3} interface was observed. • The superconducting interface is instable under normal conditions. - Abstract: Metastable superconductivity at T{sub c} ≈ 65 K has been observed in Al foil subjected to special oxidation process, according to the ac magnetic susceptibility and electrical resistance measurements. Comparison of the ac susceptibility and the dc magnetization measurements infers that the superconductivity arises within the interfacial granular layer formed during the oxidation process between metallic aluminum and its oxide.

  3. Effects of Al(III and Nano-Al13 Species on Malate Dehydrogenase Activity

    Directory of Open Access Journals (Sweden)

    Rong Fu Chen

    2011-05-01

    Full Text Available The effects of different aluminum species on malate dehydrogenase (MDH activity were investigated by monitoring amperometric i-t curves for the oxidation of NADH at low overpotential using a functionalized multi-wall nanotube (MWNT modified glass carbon electrode (GCE. The results showed that Al(III and Al13 can activate the enzymatic activity of MDH, and the activation reaches maximum levels as the Al(III and Al13 concentration increase. Our study also found that the effects of Al(III and Al13 on the activity of MDH depended on the pH value and aluminum speciation. Electrochemical and circular dichroism spectra methods were applied to study the effects of nano-sized aluminum compounds on biomolecules.

  4. {sup 27}Al NMR studies of NpPd{sub 5}Al{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Chudo, H., E-mail: chudo.hiroyuki@jaea.go.j [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Sakai, H.; Tokunaga, Y.; Kambe, S. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Aoki, D.; Homma, Y.; Shiokawa, Y. [Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313 (Japan); Haga, Y.; Ikeda, S.; Matsuda, T.D. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Onuki, Y. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan); Yasuoka, H. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)

    2009-10-15

    We present {sup 27}Al NMR studies for a single crystal of the Np-based superconductor NpPd{sub 5}Al{sub 2}(T{sub c}=4.9K). We have observed a five-line {sup 27}Al NMR spectrum with a center line and four satellite lines separated by first-order nuclear quadrupole splittings. The Knight shift clearly drops below T{sub c}. The temperature dependence of the {sup 27}Al nuclear spin-lattice relaxation rate shows no coherence peak below T{sub c}, indicating that NpPd{sub 5}Al{sub 2} is an unconventional superconductor with an anisotropic gap. The analysis of the present NMR data provides evidence for strong-coupling d-wave superconductivity in NpPd{sub 5}Al{sub 2}.

  5. Protective Al2O3 scale formation on NbAl3-base alloys

    Science.gov (United States)

    Doychak, J.; Hebsur, M. G.

    1991-01-01

    The oxidation of NbAl3 with additions of Cr and Y was studied to determine the mechanisms of the beneficial effects of these elements upon oxidation. Cr additions to the binary NbAl3 alloy of up to 6.8 at. percent reduced the scale growth rates and promoted alpha-Al2O3 formation over much longer times relative to binary NbAl3. A major effect of Cr is to form a layer of AlNbCr at the metal/scale interface, which is inherently more oxidation-resistant than the matrix alloy in the long term. Yttrium additions to a Cr-containing alloy improved the scale growth rate and adherence and changed the scale microstructure to mimic that of a typical protective Al2O3 scale.

  6. 60Co gamma radiation effect on AlGaN/AlN/GaN HEMT devices

    Institute of Scientific and Technical Information of China (English)

    WANG Yan-Ping; LUO Yin-Hong; WANG Wei; ZHANG Ke-Ying; GUO Hong-Xia; GUO Xiao-Qiang; WANG Yuan-Ming

    2013-01-01

    The testing techniques and experimental methods of the 60Co gamma irradiation effect on AlGaN/AlN/GaN high electron mobility transistors (HEMTs) are established.The degradation of the electrical properties of the device under the actual radiation environment are analyzed theoretically,and studies of the total dose effects of gamma radiation on AlGaN/AlN/GaN HEMTs at three different radiation bias conditions are carried out.The degradation patterns of the main parameters of the AlGaN/AlN/GaN HEMTs at different doses are then investigated,and the device parameters that were sensitive to the gamma radiation induced damage and the total dose level induced device damage are obtained.

  7. Kinetic Monte Carlo of transport processes in Al/AlOx/Au-layers: Impact of defects

    Science.gov (United States)

    Weiler, Benedikt; Haeberle, Tobias; Gagliardi, Alessio; Lugli, Paolo

    2016-09-01

    Ultrathin films of alumina were investigated by a compact kMC-model. Experimental jV-curves from Al/AlOx/Au-junctions with plasma- and thermal-grown AlOx were fitted by simulated ones. We found dominant defects at 2.3-2.5 eV below CBM for AlOx with an effective mass mox ∗= 0.35 m0 and a barrier EB ,A l /A l O x≈2.8 eV in agreement with literature. The parameterization is extended to varying defect levels, defect densities, injection barriers, effective masses and the thickness of AlOx. Thus, dominant charge transport processes and implications on the relevance of defects are derived and AlOx parameters are specified which are detrimental for the operation of devices.

  8. Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 3NiAl-Al2O3 Composites

    Directory of Open Access Journals (Sweden)

    In-Jin Shon

    2011-01-01

    Full Text Available Nanopowders of 3NiAl and Al2O3 were synthesized from 3NiO and 5Al powders by high-energy ball milling. Nanocrystalline Al2O3 reinforced composite was consolidated by high-frequency induction-heated sintering within 3 minutes from mechanochemically synthesized powders of Al2O3 and 3NiAl. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition grain growth. Nanocrystalline materials have received much attention as advanced engineering materials with improved physical and mechanical properties. The relative density of the composite was 97%. The average Vickers hardness and fracture toughness values obtained were 804 kg/mm2 and 7.5 MPa⋅m1/2, respectively.

  9. Microscopic Properties of Long-Period Ordering in Al-Rich TiAl Alloys

    Science.gov (United States)

    Hata, S.; Nakano, T.; Kuwano, N.; Itakura, M.; Matsumura, S.; Umakoshi, Y.

    2008-07-01

    The ordering mechanism of long-period superstructures (LPSs) in Al-rich TiAl alloys has been investigated by high-resolution transmission electron microscopy (HRTEM). The LPSs are classified in terms of arrangements of base clusters with different shapes and compositions formed in Ti-rich (002) layers of L10-TiAl matrix: square Ti4Al, fat rhombus Ti3Al, and lean rhombus Ti2Al type clusters. The HRTEM observations revealed that antiphase boundaries of long-range-ordered LPS domains and short-range-ordered microdomains are constructed by various space-filling arrangements of the base clusters. Such a microscopic property characterized by the base clusters and their arrangements is markedly analogous to that of the {left< {{text{1,1/2,0}}} rightrangle } * special-point ordering alloys such as Ni-Mo.

  10. Comparison of Al electromigration in conventional Al alloy and W-plug contacts to silicon

    Science.gov (United States)

    Oates, A. S.; Martin, E. P.; Alugbin, D.; Nkansah, F.

    1993-06-01

    We examine the impact of the presence of a W plug on electromigration-induced voiding of the Al alloy layer of contacts to silicon. By comparing conventional Al alloy and W-plug contacts we show that the presence of the plug does not significantly improve the intrinsic susceptibility of contacts to Al voiding despite the elimination of the Al step coverage problem. Both the conventional Al alloy and W-plug contacts degrade by drift of the Al layer with a velocity that is not influenced by the contact structure. The sheet resistance of the underlayer material of multilayer conductors plays an important role in influencing failure times since it determines the rate of resistance increase due to electromigration.

  11. Effects of Al(III) and nano-Al13 species on malate dehydrogenase activity.

    Science.gov (United States)

    Yang, Xiaodi; Cai, Ling; Peng, Yu; Li, Huihui; Chen, Rong Fu; Shen, Ren Fang

    2011-01-01

    The effects of different aluminum species on malate dehydrogenase (MDH) activity were investigated by monitoring amperometric i-t curves for the oxidation of NADH at low overpotential using a functionalized multi-wall nanotube (MWNT) modified glass carbon electrode (GCE). The results showed that Al(III) and Al(13) can activate the enzymatic activity of MDH, and the activation reaches maximum levels as the Al(III) and Al(13) concentration increase. Our study also found that the effects of Al(III) and Al(13) on the activity of MDH depended on the pH value and aluminum speciation. Electrochemical and circular dichroism spectra methods were applied to study the effects of nano-sized aluminum compounds on biomolecules.

  12. Determination of Al Composition in Strained AlGaN Layers

    Institute of Scientific and Technical Information of China (English)

    ZHOU Sheng-Qiang; WU Ming-Fang; YAO Shu-De

    2005-01-01

    @@ Alx Ga1-x N/GaN heterostructures are grown on c-sapphire with the Al composition x from 0.2 to 0.4 and thicknesses from 20nm to 30nm. The lattice parameters a and c are determined from 2θ/ω scan. The AlGaN layers are found to be under tensile strain by using x-ray diffraction. Vegard's law induces a large deviation in Al composition determination by only considering the linear relationship between one lattice parameter (a or c) and Al composition. The accurate determination of Al composition is only possible with consideration of both the lattice parameters a and c, by assuming the tetragonal distortion in the AlGaN layer. Additionally, the results obtained from x-ray diffraction are verified by Rutherford backscattering.

  13. Preparation of TiAl3-Al composite coating by cold spraying

    Institute of Scientific and Technical Information of China (English)

    SHEN Li; KONG Ling-yan; XIONG Tian-ying; DU Hao; LI Tie-fan

    2009-01-01

    TiAl3-Al coating was deposited on orthorhombic Ti2AlNb alloy substrate by cold spraying with the mixture of pure Al and Ti as the feedstock powder at a fixed molar ratio of 3-1 when the spraying distance, gas temperature and gas pressure for the process were 10 mm, 250 ℃ and 1.8 MPa, respectively. The as-sprayed coating was then subjected to heat treatment at 630 ℃ in argon atmosphere for 5 h at a heating rate of 3 ℃/min and an argon gas flow rate of 40 mL/min. The obtained TiAl3-Al composite coating is about 212 μm with a density of 3.16 g/cm3 and a porosity of 14.69% in general. The microhardness and bonding strength for the composite coating are HV525 and 27.12 MPa.

  14. TEM characterization of oxidized AlGaAs/AlAs nonlinear optical waveguides

    Energy Technology Data Exchange (ETDEWEB)

    Guillotel, E; Langlois, C; Ghiglieno, F; Leo, G; Ricolleau, C, E-mail: cyril.langlois@univ-paris-diderot.f [Laboratoire Materiaux et Phenomenes Quantiques, CNRS-UMR 7162 Universite Paris Diderot - Paris 7 Case courrier 7021, 75205 Paris Cedex 13 (France)

    2010-09-29

    The internal interfaces of multilayer Al{sub x}Ga{sub 1-x}As/AlAs nonlinear optical waveguides are investigated by high-angle annular-dark-field and energy-filtered scanning transmission electron microscopy, before and after partial wet oxidation of AlAs layers. Via a simple phenomenological model, the corresponding roughness parameters allow prediction of the scattering-induced waveguide optical losses, which are in reasonable agreement with the experimental value of 0.5 cm{sup -1}. We also find that Al{sub x}Ga{sub 1-x}As layers adjacent to oxidized AlAs tend to be oxidized through the interfaces, even for low Al fraction, with typical oxidation depths of 9 nm for x = 0.7 and 2 nm for x = 0.

  15. Compressive properties of a reaction milled NiAl-AlN composite

    OpenAIRE

    Whittenberger, J. Daniel; Arzt, Eduard; Luton, Michael J.

    1990-01-01

    Cryomilling (high intensity mechanical ball milling in a liquid nitrogen bath) of the B2 crystal structure nickel aluminide leads to a NiAl composite containing about 10 vol. % of AlN particles. This is the result of a reaction milling process, where nitrogen incorporated into the matrix during cryomilling reacts with Al during subsequent thermomechanical processing to form the composite. Compressive testing at 1300 K of such materials densified by 1505 K extrusion or isostatic pressing at 13...

  16. Another Security Improvement over the Lin et al.'s E-voting Scheme

    Science.gov (United States)

    Asaar, Maryam Rajabzadeh; Mohajeri, Javad; Salmasizadeh, Mahmoud

    In 2003, Lin et al. have proposed an electronic voting scheme which can be utilized in large-scale elections, and claimed it detects double voting. But in this paper, by presenting an attack, we show that voters can successfully vote more than once without being detected. Hence, we propose a new modified scheme based on the Lin et al.'s scheme with the same efficiency to solve this weakness and analyze its security.

  17. Cryptanalysis of Xinyu et al.'s NTRU-Lattice Based Key Exchange Protocol

    OpenAIRE

    Valluri, Maheswara Rao

    2016-01-01

    Xinyu et al. proposed a public key exchange protocol, which is based on the NTRU-lattice based cryptography. In this paper, we show how Xinyu et al.'s NTRU-KE: A lattice based key exchange protocol can be broken, under the assumption that a man-in-the middle attack is used for extracting private keys of users who participate in the key exchange protocol.

  18. Modified Mechanism of Eutectic Silicon in Al2O3/Al-Si Alloy

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Al2O3/Al-Si alloy composite was manufactured by squeeze casting. The morphology of the eutectic silicon in the composite was observed by scanning electronic microscope (SEM), and the modified mechanism of eutectic silicon in the composite was approached. The alumina fiber in the composite can trigger twin during the growth of Al-Si eutectic and lead to the modification of eutectic silicon near the fiber.

  19. Two-Phase (TiAl+TiCrAl) Coating Alloys for Titanium Aluminides

    Science.gov (United States)

    Brady, Michael P. (Inventor); Smialek, James L. (Inventor); Brindley, William J. (Inventor)

    1998-01-01

    A coating for protecting titanium aluminide alloys, including the TiAl gamma + Ti3Al (alpha(sub 2)) class, from oxidative attack and interstitial embrittlement at temperatures up to at least 1000 C. is disclosed. This protective coating consists essentially of titanium, aluminum. and chromium in the following approximate atomic ratio: Ti(41.5-34.5)Al(49-53)Cr(9.5-12.5)

  20. 77 FR 73732 - In the Matter of Amendment of the Designation of al-Qa'ida in Iraq, aka Jam'at al Tawhid wa'al...

    Science.gov (United States)

    2012-12-11

    ... al-Qaida in Mesopotamia, aka al-Qaida in the Land of the Two Rivers, aka al-Qaida of the Jihad in the... Organization Base of Jihad/Mesopotamia, aka The Organization of al-Jihad's Base of Operations in the Land of...

  1. Generation and evolution of nanoscale AlP and Al{sub 13}Fe{sub 4} particles in Al-Fe-P system

    Energy Technology Data Exchange (ETDEWEB)

    Qiao, Huan; Gao, Tong; Zhu, Xiangzhen; Wu, Yuying; Qian, Zhao; Liu, Xiangfa, E-mail: xfliu@sdu.edu.cn

    2015-02-15

    Highlights: • Diffusion and gradual solid reactions between Al and Fe{sub x}P phases in Al-Fe-P alloy were investigated. • Nanoscale AlP clusters are in-situ generated and evolve during the whole process. • This novel Al-Fe-P alloy has an excellent low-temperature refining performance on hypereutectic Al-Si alloy. - Abstract: In this paper, the gradual solid reactions between Al and Fe{sub x}P phases in Al-Fe-P alloy were investigated. The results show that the whole reaction process undergoes four main stages: the diffusion of Al atom, the generation of (Al, Fe, P) intermediate compound, the precipitation of nano AlP and Al{sub 13}Fe{sub 4} clusters and their growth to submicron particles. The microstructure of Fe-P particles evolves from the “egg-type”, the “sponge-type” to the “sesame-cake” structure. AlP and Al{sub 13}Fe{sub 4} nano phases have in-situ generated and evolved during the whole process. The gradual reaction mechanism has been discussed. Furthermore, a novel Al-Fe-P alloy which contains (Al, Fe, P) intermediate compounds and nano AlP particles has been synthesized and its low-temperature refining performance on A390 alloy has also been investigated.

  2. Growth of CdTe: Al films; Crecimiento de peliculas de CdTe: Al

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez A, M.; Zapata T, M. [CICATA-IPN, 89600 Altamira, Tamaulipas (Mexico); Melendez L, M. [CINVESTAV-IPN, A.P. 14-740, 07000 Mexico D.F. (Mexico); Pena, J.L. [CINVESTAV-IPN, A.P. 73 Cordemex, 97310 Merida, Yucatan (Mexico)

    2006-07-01

    CdTe: AI films were grown by the close space vapor transport technique combined with free evaporation (CSVT-FE). The Aluminum (Al) evaporation was made by two kinds of sources: one made of graphite and the other of tantalum. The films were deposited on glass substrates. The Al source temperature was varied maintaining the CdTe source temperature fixed as well as the substrate temperature. The films were characterized by x-ray energy dispersive analysis (EDAX), x-ray diffraction and optical transmission. The results showed for the films grown with the graphite source for Al evaporation, the Al did not incorporate in the CdTe matrix, at least to the level of EDAX sensitivity; they maintained the same crystal structure and band gap. For the samples grown with the tantalum source, we were able to incorporate the Al. The x-ray diffraction patterns show that the films have a crystal structure that depends on Al concentration. They were cubic up to 2.16 at. % Al concentration; for 19.65 at. % we found a mixed phase; for Al concentration higher than 21 at. % the films were amorphous. For samples with cubic structure it was found that the lattice parameter decreases and the band gap increases with Al concentration. (Author)

  3. Hydrolyzed Al(Ⅲ) clusters: Speciation stability of nano-Al13

    Institute of Scientific and Technical Information of China (English)

    Dongsheng Wang; Shuifeng Wang; Chihpin Huang; Christopher W K. Chow

    2011-01-01

    Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant.The property and stability of various species formed were characterized using Infrared, 27Al-NMR,photo correlation spectroscopy (PCS), and Ferron assay.Results showed that concentration and temperature exhibited different roles on the stability of Al13.The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS.Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging.The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb.At low concentrations,Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90℃.

  4. Synthesis of core-shell AlOOH hollow nanospheres by reacting Al nanoparticles with water

    Science.gov (United States)

    Lozhkomoev, A. S.; Glazkova, E. A.; Bakina, O. V.; Lerner, M. I.; Gotman, I.; Gutmanas, E. Y.; Kazantsev, S. O.; Psakhie, S. G.

    2016-05-01

    A novel route for the synthesis of boehmite nanospheres with a hollow core and the shell composed of highly crumpled AlOOH nanosheets by oxidizing Al nanopowder in pure water under mild processing conditions is described. The stepwise events of Al transformation into boehmite are followed by monitoring the pH in the reaction medium. A mechanism of formation of hollow AlOOH nanospheres with a well-defined shape and crystallinity is proposed which includes the hydration of the Al oxide passivation layer, local corrosion of metallic Al accompanied by hydrogen evolution, the rupture of the protective layer, the dissolution of Al from the particle interior and the deposition of AlOOH nanosheets on the outer surface. In contrast to previously reported methods of boehmite nanoparticle synthesis, the proposed method is simple, and environmentally friendly and allows the generation of hydrogen gas as a by-product. Due to their high surface area and high, slit-shaped nanoporosity, the synthesized AlOOH nanostructures hold promise for the development of more effective catalysts, adsorbents, vaccines and drug carriers.

  5. Hydrolyzed Al(III) clusters: speciation stability of nano-Al13.

    Science.gov (United States)

    Wang, Dongsheng; Wang, Shuifeng; Huang, Chihpin; Chow, Christopher W K

    2011-01-01

    Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy (PCS), and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS. Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90 degrees C.

  6. CASTABILITY OF Al-Li-Mg AND Al-Li-Cu-Mg ALLOYS

    OpenAIRE

    1987-01-01

    The objective of the present work is to study the casting characteristics of various Al-Li alloys, which include fluidity and strengths of the alloys and their interaction with cast molds. Materials investigated are Al-Li-Mg and Al-Li-Cu-Mg alloys with Li content of 2.5 wt%. The results show that sand molds with resin binders are good for Al-Li casting. Ceramic coatings can further reduce the metal-mold interactions. However, the permeability is also reduced by coating. The fluidity of Li-bea...

  7. Microstructure and thermal stability of mechanically alloyed Al3Ti/Al alloy

    Institute of Scientific and Technical Information of China (English)

    林建国; 魏浩岩; 黄正

    2001-01-01

    The microstructure stability of Al3Ti/Al alloy prepared by mechanical alloying (MA) was investigated in the simulating environment in which they may be used. The results show that the MA alloy possesses fine microstructure (the grain size is about 0.5  μm). After cycling loaded followed by heat exposure at 350  ℃ for 24  h, no microstructure coarsening of the alloy occurred, which means that the Al3Ti/Al alloy behaves good microstructure stability at high temperature. The compression yield strength of the alloy reaches up to 247  MPa at 350  ℃.

  8. Rupture of Al matrix in U-Mo/Al dispersion fuel by fission induced creep

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, Gwan Yoon; Sohn, Dong Seong [UNIST, Daejeon (Korea, Republic of); Kim, Yeon Soo [Argonne National Laboratory, Argonnge (United States); Lee, Kyu Hong [KAERI, Daejeon (Korea, Republic of)

    2016-05-15

    This phenomenon was found specifically in the dispersion fuel plate with Si addition in the Al matrix to suppress interaction layer (IL) formation between UMo and Al. It is known that the stresses induced by fission induced swelling in U-Mo fuel particles are relieved by creep deformation of the IL, surrounding the fuel particles, that has a much higher creep rate than the Al matrix. Thus, when IL growth is suppressed, the stress is instead exerted on the Al matrix. The observed rupture in the Al matrix is believed to be caused when the stress exceeded the rupture strength of the Al matrix. In this study, the possibility of creep rupture of the Al matrix between the neighboring U-Mo fuel particles was examined using the ABAQUS finite element analysis (FEA) tool. The predicted rupture time for a plate was much shorter than its irradiation life indicating a rupture during the irradiation. The higher stress leads Al matrix to early creep rupture in this plate for which the Al matrix with lower creep strain rate does not effectively relieve the stress caused by the swelling of the U-Mo fuel particles. For the other plate, no rupture was predicted for the given irradiation condition. The effect of creeping of the continuous phase on the state of stress is significant.

  9. Study on Mg/Al Weld Seam Based on Zn–Mg–Al Ternary Alloy

    Directory of Open Access Journals (Sweden)

    Liming Liu

    2014-02-01

    Full Text Available Based on the idea of alloying welding seams, a series of Zn–xAl filler metals was calculated and designed for joining Mg/Al dissimilar metals by gas tungsten arc (GTA welding. An infrared thermography system was used to measure the temperature of the welding pool during the welding process to investigate the solidification process. It was found that the mechanical properties of the welded joints were improved with the increasing of the Al content in the Zn–xAl filler metals, and when Zn–30Al was used as the filler metal, the ultimate tensile strength could reach a maximum of 120 MPa. The reason for the average tensile strength of the joint increasing was that the weak zone of the joint using Zn–30Al filler metal was generated primarily by α-Al instead of MgZn2. When Zn–40Al was used as the filler metal, a new transition zone, about 20 μm-wide, appeared in the edge of the fusion zone near the Mg base metal. Due to the transition zones consisting of MgZn2- and Al-based solid solution, the mechanical property of the joints was deteriorated.

  10. Contribución al estudio de la habronemosis gástrica

    Directory of Open Access Journals (Sweden)

    Julia Castro

    2014-06-01

    Full Text Available Se estimó la incidencia estacional de la Habronemosis gástrica en tres centros de crianza equina, utilizando la técnica del xenodiagnóstico, a través de la identificación de larvas infectivas de tercer estadío. Los resultados muestran que de un total de 50 animales estudiados, se encontró 92% de incidencia, por Habronemosis. El análisis microscópico de las características generales de las larvas y sus dimensiones permitieron identificar a la especie investigada como Habronema muscae (Carter, 1861. Así mismo en todos los casos se encontró a Musca domestica como responsable de la transmisión de esta parasitosis en los tres centros. No se encontró una relación significativa entre la edad del animal y el grado de parasitismo ya que la infección fue semejante en individuos jóvenes como adultos, ni tampoco entre la presencia de úlceras en la piel y la habronemosis gástrica.

  11. Direct laser cooling Al+ ions optical clocks

    CERN Document Server

    Zhang, J; Luo, J; Lu, Z H

    2016-01-01

    Al$^+$ ions optical clock is a very promising optical frequency standard candidate due to its extremely small blackbody radiation shift. It has been successfully demonstrated with indirect cooled, quantum-logic-based spectroscopy technique. Its accuracy is limited by second-order Doppler shift, and its stability is limited by the number of ions that can be probed in quantum logic processing. We propose a direct laser cooling scheme of Al$^+$ ions optical clocks where both the stability and accuracy of the clocks are greatly improved. In the proposed scheme, two Al$^+$ ions traps are utilized. The first trap is used to trap a large number of Al$^+$ ions to improve the stability of the clock laser, while the second trap is used to trap a single Al$^+$ ions to provide the ultimate accuracy. Both traps are cooled with a continuous wave 167 nm laser. The expected clock laser stability can reach $9.0\\times10^{-17}/\\sqrt{\\tau}$. For the second trap, in addition to 167 nm laser Doppler cooling, a second stage pulsed ...

  12. MOSQUE ARCHITECTURE AS A SUSTAINABLE BUILDING IN URBAN (Case Study: Al Markas Al Islamic Mosque Makassar

    Directory of Open Access Journals (Sweden)

    Imriyanti Imriyanti

    2014-02-01

    Full Text Available Abstract Mosque Architecture is a part of Islamic architecture. Mosque should be fused with elements of nature because its function as a place to pray to God who created the universe. Al Markas Al Islamic Makassar mosque is used as a center of Islamic aspirations of the people and the government to accommodate all the activities of moslems in Makassar. Through this function, the provision of Al Markas Al Islamic mosque began from the desire of Islamic societies in Makassar, which wants the Islamic center to be equipped with facilities and infrastructure as well as architectural, monumental buildings and structures that can be last for hundreds of years (continuous, blend with the environment, and also can be used by the public. Having regard to the function of a mosque especially at the Al Markas Al Islamic Makassar mosque, then the problem that arise is how the Al Markas Al Islamic mosque can be survived/sustainable  in order  to function  as a place  of worship  and  as a center  of Islam.  This research  is a descriptive qualitative research that is trying to generate data in the form of systematic and accurate picture of the object of study. The sustaiprophetlity  of Al Markas AL Islamic mosque can be known through the concept of Islam  in accordance with the view of Islam as well as the sustaiprophetlity of the buildings that seen in the spatial pattern of the mosque, appearance, natural lighting, natural ventilation, and user behavior of the mosque. Keywords: mosque architecture, sustaiprophetlity, view of Islam     Abstrak Arsitektur masjid merupakan bagian dari arsitektur Islam. Bangunan masjid sebaiknya dapat menyatu dengan unsur alam karena masjid difungsikan sebagai wadah dalam bersujud/sembahyang  kepada Allah SWT yang menciptakan alam semesta ini. Masjid Al Markas Al Islamic Makassar merupakan kompleks kegiatan Islam yang digunakan sebagai pusat aspirasi masyarakat  dan pemerintahan  yang dapat menampung

  13. ‘Uluww al-Isnad dalam Periwayatan Hadis Abu Muhammad al-Husain bin Mas‘ud al-Baghawi

    Directory of Open Access Journals (Sweden)

    Romlah Abubakar Askar

    2016-05-01

    Full Text Available Abu Muhammad al-Husayn Ibnu Mas’ud al-Baghawi (450-516H was one of the leading scholars in Tafsir (Quran exegesis, hadith (prophetic tradition, and fiqh (Islamic legal jurisprudence in his era. He was categorized as muta’akhirūn (scholars who came later on and was instrumental in the development of these three disciplines. In the field of exegesis, he was among the scholars who used al-Ma’tsūr, (commentary stylist, relying on the verses of the Qur’an, hadith, and the statements from the followers of the tabi’īn (the followers of the followers. This can be found in his recorded work Ma’ālim al Tanzīl. In the field of hadith, he preserved the narration method and presenting a new approach by merging some patterns of hadith narration from several books of hadith in his work known as ṭarīqah al-Jam’u (combination [amalgamation] method. This pattern will not occur unless there is the existence of other transmission lines as a second chain of narration used to produce ‘uluww al-Isnād (the noble sanad or nuzūl al-Isnād (descent sanad. It is recorded in his works: al-Jam’u baina al-Ṣaḥīḥain, Sharḥ al-Sunnah and Maṣābiḥ al-Sunnah. In the field of Jurisprudence, he was amongst those mujtahidin from the Shafiee school of thought, recorded in his Majmū’ ‘al-Fatāwā, al-Kifāyah fī al-Furū’ and Kitāb al-Tahdzīb. This paper aims to examine one of al-Baghawi’s skills in sanad collection which is the uluww al-isnād and nuzūl al-isnād, recorded from his two works Ma’ālim al-Tanzīl and Syarḥ al-Sunnah. The quantitative, qualitative and comparative approach has been used in this study to give an authentic description of the terms ‘uluww al-isnād, nuzūl al-isnād from al-Baghawi. Studies have found there are many examples of uluww al-Isnād and nuzūl al-isnāds contained in the patterns of al-Baghawi’s chain of narration towards the Ṣaḥīḥayn of al-Bukhari and Muslim as the mustakhrij

  14. Hydrogenation properties of Mg-Al alloys

    DEFF Research Database (Denmark)

    Andreasen, Anders

    2008-01-01

    In this paper the properties of Mg-Al alloys in relation to hydrogen storage are reviewed. The main topics of this paper are materials preparation, hydrogen capacity, thermodynamics of hydride formation, and the kinetics of hydride formation and decomposition. Hydrogenation of Mg-Al leads...... to disproportionation with the formation of magnesium hydride and metallic aluminum as the final product. Experimental evidence renders this process reversible. It is observed that the enthalpy of hydride formation of magnesium is lowered upon alloying with Al due to a slightly endothermic disproportionation reaction....... Further, it is found that the kinetics of hydrogenation, as well dehydrogenation, may be significantly improved by alloying compared to pure Mg. The expense of these improvements of the hydrogenation/dehydrogenation properties is a lower gravimetric hydrogen density in the hydrogenated product, (C) 2008...

  15. Analyse de Viaje al pasado: los aztecas

    Directory of Open Access Journals (Sweden)

    Denis Lucchinacci

    2005-11-01

    Full Text Available 1. Présentation du logiciel Viaje al pasado: los aztecas (el perfecto simple y el imperfecto en la narración y la descripción a été conçu par Annie Desnoyers, linguiste à l'université de Montréal et Matilde Asencio, enseignante au Cégep du Vieux Montréal (Collège d'enseignement général et professionnel [], pour un public d'étudiants d'Espagnol Langue Étrangère (ELE. Disponible en deux versions - en ligne et sous forme de cédérom -, il s'agit d'un exerciseur destiné à la pratique du passé e...

  16. Autologous Stem Cell Transplant for AL Amyloidosis

    Directory of Open Access Journals (Sweden)

    Vivek Roy

    2012-01-01

    Full Text Available AL amyloidosis is caused by clonal plasma cells that produce immunoglobulin light chains which misfold and get deposited as amyloid fibrils. Therapy directed against the plasma cell clone leads to clinical benefit. Melphalan and corticosteroids have been the mainstay of treatment for a number of years and the recent availability of other effective agents (IMiDs and proteasome inhibitors has increased treatment options. Autologous stem cell transplant (ASCT has been used in the treatment of AL amyloidosis for many years. It is associated with high rates of hematologic response and improvement in organ function. However, transplant carries considerable risks. Careful patient selection is important to minimize transplant related morbidity and mortality and ensure optimal patient outcomes. As newer more affective therapies become available the role and timing of ASCT in the overall treatment strategy of AL amyloidosis will need to be continually reassessed.

  17. Thermal Properties of Al-50%Si Alloys

    Institute of Scientific and Technical Information of China (English)

    Akio Nishimoto; Katsuya Akamatsu; Kazuyoshi Nakao; Kazuo Ichii

    2004-01-01

    In order to prepare a hypereutectic Al-Si alloy with low coefficients of thermal expansion (CTE), Al-50was produced by powder metallurgy (P/M) and ingot metallurgy (I/M). P/M specimen was prepared by mechanical alloying(MA) and pulsed electric-current sintering (PECS). The microstructures of specimens were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness and CTE measurements were performed. The grains in the P/M specimen were refined with increasing MA time. Primary Si and eutectic Si in the I/M specimen were remarkably refined by adding minute amounts of Sr. The CTE of P/M and I/M specimens were estimated as 7.8×10-6 and 10.7×10-6, respectively. These values were as same as a CTE of Al2O3 ceramics.

  18. Analyse de Viaje al pasado: los aztecas

    OpenAIRE

    Denis Lucchinacci

    2005-01-01

    1. Présentation du logiciel Viaje al pasado: los aztecas (el perfecto simple y el imperfecto en la narración y la descripción) a été conçu par Annie Desnoyers, linguiste à l'université de Montréal et Matilde Asencio, enseignante au Cégep du Vieux Montréal (Collège d'enseignement général et professionnel []), pour un public d'étudiants d'Espagnol Langue Étrangère (ELE). Disponible en deux versions - en ligne et sous forme de cédérom -, il s'agit d'un exerciseur destiné à la pratique du passé e...

  19. Alternativas al modelo de investigación y desarrollo de medicamentos

    Directory of Open Access Journals (Sweden)

    Germán Velásquez

    2015-01-01

    Full Text Available Un tercio de la población mundial carece de acceso a los medicamentos y la situación es peor en los países pobres, en los que hasta un 50% de la población carece de acceso. El fracaso de los sistemas actuales de incentivos, basados en la propiedad intelectual, para ofrecer los productos farmacéuticos necesarios, especialmente en los países del sur, llama a la acción. Los problemas relacionados con el acceso a medicamentos no pueden ser resueltos tan solo a través de mejoras o adaptaciones de los modelos de incentivos existentes. El modelo del sistema de propiedad intelectual no ofrece la innovación necesaria para los países en desarrollo, se necesitan nuevos mecanismos que de forma simultánea y eficaz promuevan la innovación y el acceso a los medicamentos. Un tratado internacional vinculante sobre investigación y desarrollo, que se negocie bajo los auspicios de la Organización Mundial de la Salud, puede proporcionar el marco adecuado para garantizar el establecimiento de prioridades, la coordinación y la financiación sostenible de los medicamentos a precios asequibles para los países en desarrollo.

  20. Kritik Terhadap Pemikiran Tasawuf Al-Raniri

    Directory of Open Access Journals (Sweden)

    Syaifan Nur

    2013-12-01

    Full Text Available Abstract : Al-Raniri is often positioned by some scholars as “superior” figure, which is contrasted to Hamzah Fansuri and Syamsuddin Sumaterani, and that is why they predicate him as one of pioneer of Islamic reformer in Malay- Indonesian archipelago. Anti-wujūdiyyah Sufism campaign by al-Raniri quite successful to some extent to amputate the rate of development of philosophical Sufism was brought by Fansuri and Sumaterani in the one hand, and strike off the nature of moral Sufism in the other, redeemed by bloodshed. This article discussed the “superiority” of al-Raniri’s thought of Sufism, viewed from a broader spectrum, either in relation to problems of faith or theology and politics surrounding the circumstance of his time.Keywords : Philosophical tasawuf, neo-sufism, panteism, tajalli, God’s attributeAbstrak : Al-Raniri oleh banyak kalangan seringkali diposisikan sebagai tokoh “superior” yang diperlawankan dengan Hamzah Fansuri dan Syamsuddin Sumaterani, dan itu sebabnya para ahli memberinya predikat sebagai seorang pelopor pembaru (mujaddid Islam di Nusantara. Anti tasawuf wujūdiyyah yang dikampanyekan oleh al-Raniri cukup berhasil mengamputasi laju perkembangan tasawuf falsafi yang dibawa oleh Fansuri dan Sumaterani di satu sisi, dan melancarkan laju corak tasawuf akhlaki di sisi lain, yang ditebus dengan cara pertumpahan darah. Tulisan ini mendiskusikan “superioritas” pemikiran tasawuf al-Raniri tersebut, dilihat dari spektrum yang lebih luas, baik menyangkut persoalan keyakinan atau teologi maupun politik yang mengitari situasi zamannya.Kata kunci : Tasawuf falsafi , neo-sufisme, panteisme, tajalli, sifat Tuhan

  1. [Al-Biruni--a universal scientist].

    Science.gov (United States)

    Kujundzić, E; Masić, I

    1999-01-01

    Al-Biruni's was of Persian descent. He was born in Horesmiya and had studied mathematics, history and medicine. Acquiring knowledge from these sciences, he wrote an outstanding work on chronology of several nations and devoted it to Ziyarit ruler Kabus. He made a chronological overview of calendars from many nations, including Persians, Greeks, Egyptians, Jews, Melkitian and Nestorian Christians, Sabeyaans as well as the old Arabs. Data presented in the work, according to the later authors, were taken from very reliable sources. He was contemporary of Ibn-Sina, and thanks to their friendship, they have discussed very much miscellaneous topics. He belonged to the group of scholars, taken by Gaznevian Soultan Mahmud to a long journey to India. Afterwards Al-Biruni wrote and published detailed work "Description of India"--a work on cultural history of India. Due to excellent abilities of Al-Biruni as a philosopher and scholar, there are still significant and reliable notes about buddhistic philosophy, structure of castes and Brahmans' life style. In this Al-Biruni's masterpiece, there are many comparative analysis of Suffism and certain Indian philosophical methods. Al-Biruni's most important work is "Pharmacopoeia"--"Kitab al-saydala", which brilliantly describes all medicaments. This work has been published in many languages. He also wrote few works on astronomy and astrology. In those works he has explained some astrological events through scientific approach in a such peculiar way that nobody has ever explained before. He was also interested in sciences like geology, mineralology, geography, mathematics, psychology and many others.

  2. Fabrication of Al-Al3Ti/Ti3Al Functionally Graded Materials under a Centrifugal Force

    Directory of Open Access Journals (Sweden)

    Yoshimi Watanabe

    2010-09-01

    Full Text Available Fabrication of Al-Al3Ti functionally graded materials (FGMs under the centrifugal force has recently attracted some attention. The controlled compositional gradient of the fabricated FGMs, the low cost of the process, and the good mold filling, are the main advantages of the centrifugal method (CM. Using the conventional CM techniques such as the centrifugal solid-particle method and centrifugal in-situ method, FGMs rings with gradually distributed properties could be achieved. As a more practical choice, the centrifugal mixed-powder method (CMPM was recently proposed to obtain FGMs containing nano-particles selectively dispersed in the outer surface of the fabricated parts. However, if a control of the particles morphology, compound formulas or sizes, is desired, another CM technique is favored. As a development of CMPM, our novel reaction centrifugal mixed-powder method (RCMPM has been presented. Using RCMPM, Al‑Al3Ti/Ti3Al FGMs with good surface properties and temperature controlled compositional gradient could be achieved. In this short review, this novel method will be discussed in detail and the effect of RCMPM processing temperature on the reinforcement particles morphology, size and distribution through the fabricated samples, will be reviewed.

  3. Total energy, equation of state and bulk modulus of AlP, AlAs and AlSb semiconductors

    Indian Academy of Sciences (India)

    A R Jivani; H J Trivedi; P J Gajjar; A R Jani

    2005-01-01

    Recently proposed model potential which combines both linear and quadratic types of interactions is employed for the investigation of some properties like the total energy, equation of state and bulk modulus of AlP, AlAs and AlSb semiconductor compounds using higher-order perturbation theory. The model potential parameter is determined using zero pressure condition. The ratio of the covalent bonding term E cov to the second-order term 2 is 6.77% to 11.85% which shows that contribution from higher order terms are important for zinc-blende-type crystals. The calculated numerical results of the total energy, energy band gap at Jones-zone face and bulk modulus of these compounds are in good agreement with the experimental data and found much better than other such theoretical findings. We have also studied pressure–volume relations of these compounds. The present study is carried out using six different screening functions along with latest screening function proposed by Sarkar et al. It is found from the present study that effect of exchange and correlation is clearly distinguishable.

  4. Del Derecho laboral al Derecho del trabajo

    OpenAIRE

    Jaramillo Jassir, Ivan Daniel

    2011-01-01

    El Derecho Laboral hijo de la revolución industrial, calificado como el acontecimiento jurídico del siglo XX, reduce su ámbito de estudio al trabajo subordinado. Los cambios del sistema de producción superan la centralidad del contrato de trabajo subordinado a tiempo indeterminado, situación que demanda ampliación del ámbito de aplicación subjetivo y objetivo de la materia, dando paso al Derecho del Trabajo que se ocupa del trabajo en todas sus modalidades como fuente de ingreso para satisfac...

  5. Simulations of the premelting of Al(110)

    DEFF Research Database (Denmark)

    Stoltze, Per

    1990-01-01

    The premelting of Al(110) is studied by molecular dynamics simulations using the potential for Al derived from effective medium theory. We find a progressive disordering of the surface region as the bulk melting point is approached. This disorder is mediated by the formation of adatom–vacancy pairs....... Based on the calculated radial distribution function and the analytical expression for the energy, it is demonstrated that the thermodynamics of disorder and melting is reflected in the single particle properties by a decrease in the number of nearest neighbors. The Debye temperature for the surface...

  6. Aspectos biopsicosociales asociados al embarazo adolescente

    OpenAIRE

    Regina Cogollo Jiménez

    2012-01-01

    Introducción: El embarazo en la adolescencia, es un evento inesperado, sorpresivo. Este artículo establece la importancia de identificar los aspectos biopsicosociales asociados al embarazo adolescente en las embarazadas asistentes al programa de Control Prenatal de una Empresa Social del Estado de nivel 1 en Montería en 2009, para comprender las actitudes y los comportamientos asociados a esta etapa tan temprana. Materiales y Métodos: Es un estudio descriptivo, cuantitativo, de corte transver...

  7. Vibrations on Al surfaces covered by sodium

    Science.gov (United States)

    Rusina, G. G.; Eremeev, S. V.; Borisova, S. D.; Sklyadneva, I. Yu.; Chulkov, E. V.

    2006-09-01

    In this paper we present the results of a comparative study of vibrational and structural properties of the ordered (√{3}×√{3})R30∘ and c(2 × 2) phases formed by Na adatoms at room temperature on the Al(1 1 1) and Al(1 0 0) surfaces, respectively. The surface relaxation, surface phonon dispersion, and polarization of vibrational modes are calculated using the embedded-atom method. Our calculated structural parameters are in agreement with experimental and ab initio results. The obtained vibrational frequencies compare fairly well with available experimental data.

  8. Nuestra labor de mirar al otro

    OpenAIRE

    Campos Saborío, Natalia

    2016-01-01

    El estudio etnográfico que dio origen al libro que hoy presentamos, se tituló la "Etnografía del cambio educativo en el ámbito de la investigación social". Una de sus misiones fue buscar al otro, entendiéndose el otro, de aquí en adelante como director, directora, docentes, niños y niñas y padres de familia de la escuela #1, como la llamamos en la investigación antes citada.

  9. Magnetic Properties of NdAl2

    DEFF Research Database (Denmark)

    Bak, P.

    1974-01-01

    The magnetic properties of NdAl2 are calculated using a Hamiltonian including crystal-field and isotropic exchange interaction terms. A two-dimensional mean-field theory is evaluated to calculate single-crystal magnetization curves. It is shown that the magnetic properties can be understood using...... the crystal-field parameters derived from the magnetic exciton spectrum measured by Houmann et al. by means of inelastic neutron scattering. The combined lambda -Schottky anomaly in the heat capacity is explained. No additional parameters are introduced....

  10. Aspectos biopsicosociales asociados al embarazo adolescente

    OpenAIRE

    2012-01-01

    Introducción: El embarazo en la adolescencia, es un evento inesperado, sorpresivo. Este artículo establece la importancia de identificar los aspectos biopsicosociales asociados al embarazo adolescente en las embarazadas asistentes al programa de Control Prenatal de una Empresa Social del Estado de nivel 1 en Montería en 2009, para comprender las actitudes y los comportamientos asociados a esta etapa tan temprana. Materiales y Métodos: Es un estudio descriptivo, cuantitativo, de corte transver...

  11. Semantische Merkmale als Mittel der Textkonstitution

    Directory of Open Access Journals (Sweden)

    Stojan Bračič

    2008-12-01

    Full Text Available Im folgenden Beitrag sollen semantische Relationen unter die Lupe genommen werden, die im text dazu beitragen, dass einzelne Textkomponenten miteinander verknüpft werden. Dabei geht es hauptsächlich um Relationen, die nicht satzthematisch sind - diese sind nämlich als textuelle Koreferenzketten ausreichend untersucht worden (vgl. u.a. Bračič/Fix/Greule 2007 - sondern um jene Relationen, die als Prädikationen einzelner textgrammatischer Einheiten (Sätze vorkommen und ebenfalls gewisse geordnete Strukturierungen aufweisen.

  12. Distribution and size of lava shields on the Al Haruj al Aswad and the Al Haruj al Abyad Volcanic Systems, Central Libya

    Science.gov (United States)

    Elshaafi, Abdelsalam; Gudmundsson, Agust

    2017-05-01

    The Al Haruj Volcanic Province (AHVP) consists of two distinct volcanic systems. In the north is the system of Al Haruj al Aswad, covering an area of 34,200 km2, while in the south the system of Al Haruj al Abyad, covering an area of 7,850 km2. The systems have produced some 432 monogenetic volcanoes, primarily scoria (cinder) cones, lava shields, and maars. The density distribution of the volcanoes in each system, plotted as eruption points or sites, has a roughly elliptical surface expression, suggesting similar plan-view geometry of the magma sources, here suggested as deep-seated reservoirs. More specifically, the Al Haruj al Aswad magma reservoir has major and minor axes of 210 km and 119 km, respectively, and an area of 19,176 km2, the corresponding figures for the Haruj al Abyad reservoir being 108 km and 74 km, for the axes, and 6209 km2 for the area. We measured 55 lava shields on the AHVP. They are mostly restricted to the northern and southern parts of AHVP and date from late Miocene to (at least) the end of Pleistocene, while some may have been active into Holocene. In fact, although primarily monogenetic, some of the lava shields show evidence of (possibly Holocene) fissure eruptions in the summit parts. The early lava shields tend to be located at the edges of volcanic systems and with greater volumes than later (more central) shields. The average lava shield basal diameter is 4.5 km and height 63 m. There is strong linear correlation between lava shield volume and basal area, the coefficient of determination (R2) being about 0.75. When 22 Holocene Icelandic lava shields are added to the dataset, for comparison, the correlation between volume and basal area becomes R2 = 0.95. Numerical models suggest that the local stress fields favoured rupture and dyke injection at the margins of the source reservoirs during late Miocene - early Pliocene, in agreement with the distribution of the early, large-volume shields.

  13. Metamagnetism in Ce(Ga,Al)2

    Indian Academy of Sciences (India)

    K G Suresh; S Radha; A K Nigam

    2002-05-01

    Effect of Al substitution on the magnetic properties of Ce(Ga1-Al)2 ( = 0, 0.1 and 0.5) system has been studied. The magnetic state of CeGa2 is found to be FM with a C of 8 K, whereas the compounds with =0.1 and 0.5 are AFM and possess N of about 9 K. These two compounds undergo metamagnetic transition and the critical fields are about 1.2 T and 0.5 T, respectively at 2 K. These variations are explained on the basis of helical spin structure in these compounds.

  14. Instability of TiC and TiAl3 compounds in Al-10Mg and Al-5Cu alloys by addition of Al-Ti-C master alloy

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The performance of Al-Ti-C master alloy in refining Al-10Mg and A1-5Cu alloys was studied by using electron probe micro-analyzer (EPMA) and X-ray diffractometer (XRD) analysis.The results indicate that there are obvious fading phenomena in both Al-10Mg and Al-5Cu alloys with the addition of Al-5Ti-0.4C refiner which contains TiC and TiAl3 compounds.Mg element has no influence on the stability of TiC and TiAl3, while TiC particles in Al-10Mg alloy react with Al to form Al4C3 particles, resulting in the refinement fading.However, TiC particles are relatively stable in Al-5Cu alloy, while TiAl3 phase reacts with Al2Cu to produce a new phase Ti(Al, Cu)2, which is responsible for the refinement fading in Al-5Cu alloy.These indicate that the refinement fading will not occur only when both the TiC particles and TiAl3 compound of Al-Ti-C refiner are stable in Al alloys.

  15. MgAl2O4–-Al2O3 solid solution interaction: mathematical framework and phase separation of -Al2O3 at high temperature

    Indian Academy of Sciences (India)

    Soumen Pal; A K Bandyopadhyay; S Mukherjee; B N Samaddar; P G Pal

    2011-07-01

    Although existence of MgAl2O4–-Al2O3 solid solution has been reported in the past, the detailed interactions have not been explored completely. For the first time, we report here a mathematical framework for the detailed solid solution interactions of -Al2O3 in MgAl2O4 (spinel). To investigate the solid solubility of -Al2O3 in MgAl2O4, Mg–Al spinel (MgO–Al2O3; = 1, 1.5, 3, 4.5 and an arbitrary high value 30) precursors have been heat treated at 1000°C. Presence of only non-stoichiometric MgAl2O4 phase up to = 4.5 at 1000°C indicates that alumina (as -Al2O3) present beyond stoichiometry gets completely accommodated in MgAl2O4 in the form of solid solution. → alumina phase transformation and its subsequent separation from MgAl2O4 has been observed in the Mg–Al spinel powders ( > 1) when the 1000°C heat treated materials are calcined at 1200°C. In the mathematical framework, unit cell of MgAl2O4 (Mg8Al16O32) has been considered for the solid solution interactions (substitution of Mg2+ ions by Al3+ ions) with -Al2O3. It is suggested that combination of unit cells of MgAl2O4 takes part in the interactions when > 5 (MgO–Al2O3).

  16. InAlGaAs/AlGaAs quantum wells: line widths, transition energies and segregation

    DEFF Research Database (Denmark)

    Jensen, Jacob Riis; Hvam, Jørn Märcher; Langbein, Wolfgang

    2000-01-01

    We investigate the optical properties of InAlCaAs/AlGaAs quantum wells pseudomorphically grown on GaAs using molecular beam epitaxy (MBE). The transition energies, measured with photoluminescence (PL), are modelled solving the Schrodinger equation, and taking into account segregation in the group...

  17. Draft genome sequences of the aerobic strains Lactobacillus gasseri AL3 and AL5

    NARCIS (Netherlands)

    Maresca, Diamante; Filippis, De Francesca; Tytgat, Hanne L.P.; Vos, de W.M.; Maurielloa, Gianluigi

    2017-01-01

    Adaptation to the aerobic environment has been investigated in heterofermentative lactobacilli, while data on how homofermentative lactobacilli adapt to oxygen are limited. We report here the draft genome sequences of the aerobic strains Lactobacillus gasseri AL3 and AL5 that allow an in-depth in

  18. Electronic circuits having NiAl and Ni.sub.3 Al substrates

    Energy Technology Data Exchange (ETDEWEB)

    Deevi, Seetharama C. (Midlothian, VA); Sikka, Vinod K. (Oak Ridge, TN)

    1999-01-01

    An electronic circuit component having improved mechanical properties and thermal conductivity comprises NiAl and/or Ni.sub.3 Al, upon which an alumina layer is formed prior to applying the conductive elements. Additional layers of copper-aluminum alloy or copper further improve mechanical strength and thermal conductivity.

  19. Electronic circuits having NiAl and Ni{sub 3}Al substrates

    Energy Technology Data Exchange (ETDEWEB)

    Deevi, S.C.; Sikka, V.K.

    1999-10-12

    An electronic circuit component having improved mechanical properties and thermal conductivity comprises NiAl and/or Ni{sub 3}Al, upon which an alumina layer is formed prior to applying the conductive elements. Additional layers of copper-aluminum alloy or copper further improve mechanical strength and thermal conductivity.

  20. Electronic circuits having NiAl and Ni.sub.3 Al substrates

    Science.gov (United States)

    Deevi, Seetharama C.; Sikka, Vinod K.

    1999-01-01

    An electronic circuit component having improved mechanical properties and thermal conductivity comprises NiAl and/or Ni.sub.3 Al, upon which an alumina layer is formed prior to applying the conductive elements. Additional layers of copper-aluminum alloy or copper further improve mechanical strength and thermal conductivity.

  1. Directional Solidification and Mechanical Properties of NiAl-NiAlTa Alloys

    Science.gov (United States)

    Johnson, D. R.; Chen, X. F.; Oliver, B. F.; Noebe, R. D.; Whittenberger, J. D.

    1995-01-01

    Directional solidification of eutectic alloys is a promising technique for producing in-situ composite materials exhibiting a balance of properties. Consequently, the microstructure, creep strength and fracture toughness of directionally solidified NiAl-NiAlTa alloys were investigated. Directional solidification was performed by containerless processing techniques to minimize alloy contamination. The eutectic composition was found to be NiAl-15.5 at% Ta and well-aligned microstructures were produced at this composition. A near-eutectic alloy of NiAl-14.5Ta was also investigated. Directional solidification of the near-eutectic composition resulted in microstructures consisting of NiAl dendrites surrounded by aligned eutectic regions. The off-eutectic alloy exhibited promising compressive creep strengths compared to other NiAl-based intermetallics, while preliminary testing indicated that the eutectic alloy was competitive with Ni-base single crystal superalloys. The room temperature toughness of these two-phase alloys was similar to that of polycrystalline NiAl even with the presence of the brittle Laves phase NiAlTa.

  2. Electronic states and spin-forbidden cooling transitions of AlH and AlF.

    Science.gov (United States)

    Wells, Nathan; Lane, Ian C

    2011-11-14

    The feasibility of laser cooling AlH and AlF is investigated using ab initio quantum chemistry. All the electronic states corresponding to the ground and lowest two excited states of the Al atom are calculated using multi-reference configuration interaction (MRCI) and the large AV6Z basis set for AlH. The smaller AVQZ basis set is used to calculate the valence electronic states of AlF. Theoretical Franck-Condon factors are determined for the A(1)Π→ X(1)Σ(+) transitions in both radicals and found to agree with the highly diagonal factors found experimentally, suggesting computational chemistry is an effective method for screening suitable laser cooling candidates. AlH does not appear to have a transition quite as diagonal as that in SrF (which has been laser cooled) but the A(1)Π→ X(1)Σ(+) transition transition of AlF is a strong candidate for cooling with just a single laser, though the cooling frequency is deep in the UV. Furthermore, the a(3)Π→ X(1)Σ(+) transitions are also strongly diagonal and in AlF is a practical method for obtaining very low final temperatures around 3 μK.

  3. Muslih b. `Abd al-Rahman al-Maraqî : Muslikh of Mranggen

    NARCIS (Netherlands)

    Bruinessen, M.M. van

    2007-01-01

    MUSLIH b. `ABD AL-RAHMAN AL-MARAQÎ (KH. Muslikh of Mranggen) [Indonesia; 1917-1981] [Dictionnaire biographique des savants et grandes figures du monde musulman périphérique, du XIXe siècle à nos jours, Fasc. no 2. Paris: CNRS-EHESS, 1998, p. 23-24] One of the most influential Javanese teachers of t

  4. Thermodynamic Assessments of Al-In-Sb and Al-In-As Systems

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The experimental thermodynamic and phase diagram data of the Al-In-Sb and Al-In-As ternary systems were critically assessed.A set of self-consistent thermodynamic model parameters were obtained to describe the phase equilibria and the thermodynamic properties of two systems.In most cases,the calculated values agree very well with the experimental data.

  5. Fabrication and Characterization of AL-AL4C3 Nanocomposite by Mechanical Alloying

    Science.gov (United States)

    Mohammad Sharifi, E.; Enayati, M. H.; Karimzadeh, F.

    Aluminum carbide (Al4C3) seems to be an ideal reinforcement for producing aluminum matrix composites. Al4C3 has high hardness and shear strength as well as a high melting point. The dispersion of Al4C3 particles in the matrix produces a pinning effect that reduces aluminum grain growth, which improves the mechanical properties. In this study, aluminum powders were mixed with 4.5 wt.% graphite and mechanically alloyed using a high-energy ball mill in order to produce Al-Al4C3 nanocomposite. The structural evaluation of powder particles after different milling times was studied by X-ray diffractometry, scanning electron microscopy and microhardness measurements. The aluminum crystallite size estimated with broadening of XRD peaks by Williamson-Hall formula. XRD results suggested that the grain size of aluminum decreased to nanometer range (30 nm) during ball milling. No Al4C3 formed during the mechanical alloying process. Milled powders were then annealed at 300-600 °C for 1 h under argon atmosphere. Annealing at temperatures higher than 300 °C led to formation of Al4C3 phase which increased as annealing temperature increased. Aluminum grain size remained in nanometer range after annealing process. The microhardness of powder particles increased after annealing. Both effects are due to the formation of nanosized Al4C3 particles.

  6. Sintering Behavior of CNT Reinforced Al6061 and Al2124 Nanocomposites

    Directory of Open Access Journals (Sweden)

    Nouari Saheb

    2014-01-01

    Full Text Available Ball milling and spark plasma sintering were successfully used to produce carbon nanotube reinforced Al6061 and Al2124 nanocomposites which have potential applications in the fields of aerospace, automotive, electronics, and high precision instrumentation. Al2124 and Al6061 nanocomposite powders containing 0.5 to 2 wt.% CNTs prepared through sonication and wet ball milling were spark plasma sintered at 400, 450, and 500°C for 20 minutes under a pressure of 35 MPa. CNTs were better dispersed, and less agglomerated and had good adhesion to the matrix in composites containing 1 wt.% CNTs. The increase of CNT content to 2 wt.% led to the formation of CNT clusters which resulted in less uniform and homogenous composite powders. Almost full densification of Al6061 reinforced with CNTs was achieved at 500°C. Also, CNTs reinforced Al2124 nanocomposites reached very high densities at 500°C. Composites reinforced with 1 wt.% CNTs displayed better densification compared to composites containing 2 wt.% CNTs. The increase of CNTs content from 0.5 to 1 wt.% increased the hardness of the Al6061 and Al2124 alloys to maximum values. Further increase of CNTs content to 2 wt.% decreased the hardness to values lower than that of the monolithic alloys.

  7. Synthesis of TiAl-Ti2AlN composites by in-situ crystallization

    Institute of Scientific and Technical Information of China (English)

    ZHU Jian-feng; GAO Ji-qiang; WANG Fen

    2006-01-01

    The amorphization process during mechanical alloying (MA) was investigated for the Ti-50%/Al (mole fraction) powder mixtures with no special protection conditions. During the milling process, with the milling time prolonging, the metallic powder Ti and Al were finely mixed, gradually, aluminum completely dissolved into titanium to form an Ti(Al) hcp supersaturated solid solution, and finally, transformed to the amorphous phase after milled for about 39 h. As a result of heat treatment in hot press sintering processing for the mechanically alloyed amorphous powders in vacuum, a submicrostructure intermetallics of TiAl/Ti2AlN composite can be produced by in-situ crystallization. Furthermore, the structure evolution, phase formation and transformation during the heat treatment were also investigated by X-ray diffractometry and differential thermal analysis. The results show that the reaction involves many transitional stages, including formation of TiAl3 and transformation into TiAl and Ti3Al. The examination show that the composite materials fabricated by this in-situ crystallization from amorphization have good mechanical properties due to fine grain size and uniform microstructure.

  8. Grain refinement of 7075Al alloy microstructures by inoculation with Al-Ti-B master alloy

    Science.gov (United States)

    Hotea, V.; Juhasz, J.; Cadar, F.

    2017-05-01

    This paper aims to bring some clarification on grain refinement and modification of high strength alloys used in aerospace technique. In this work it was taken into account 7075 Al alloy, and the melt treatment was carried out by placing in the form of master alloy wire ternary AlTiB the casting trough at 730°C. The morphology of the resulting microstructures was characterized by optical microscopy. Micrographs unfinished and finished with pre-alloy containing ternary Al5Ti1B evidence fine crystals, crystal containing no columnar structure and highlights the size of the dendrites, and intermetallic phases occurring at grain boundaries in Al-Zn-Mg-Cu alloy. It has been found that these intermetallic compounds are MgZn2 type. AlTiB master alloys finishing ensures a fine eutectic structure, which determines the properties of hardware and improving the mechanical properties of aluminum alloys used in aeronautical engineering.

  9. The anodic and cathodic dissolution of Al and Al-Cu-Mg alloy

    Energy Technology Data Exchange (ETDEWEB)

    Mokaddem, M.; Volovitch, P. [Laboratoire de physicochimie des surfaces, UMR7045, Ecole Nationale Superieure de Chimie de Paris, ParisTech, 11, rue Pierre et Marie Curie, Paris (France); Rechou, F.; Oltra, R. [Institut CARNOT de Bourgogne, Electrochimie Interfaciale-Corrosion, UMR5209, Universite de Bourgogne, Dijon (France); Ogle, K., E-mail: kevin-ogle@enscp.f [Laboratoire de physicochimie des surfaces, UMR7045, Ecole Nationale Superieure de Chimie de Paris, ParisTech, 11, rue Pierre et Marie Curie, Paris (France)

    2010-04-15

    Atomic emission spectroelectrochemistry (AESEC) was used to monitor the release of Al from 99.99% aluminum (1199 alloy) and Al, Mg, and Cu from 2024 Al alloy in 30 g/l NaCl electrolyte as a function of pH. The cathodic dissolution of Al was demonstrated and attributed to an increase in the pH at the interface due to the water reduction reaction. The dissolution of Mg was also observed but was a more complex function of current probably depending on the interfacial pH and the Al dissolution rate. The detachment of copper-rich particles was observed as very rapid spectroscopic emission transients (peak width < 10 ms).

  10. FABRICATION OF Al/Al2O3 FGM ROTATING DISC

    Directory of Open Access Journals (Sweden)

    A. B. Sanuddin

    2012-06-01

    Full Text Available This study presents a method of fabricating a disc made of Al/Al2O3 functionally graded materials (FGM, using a powder metallurgy manufacturing process. The aim is to develop a processing method for a rotating disc made of FGM, by stacking the slurry, layer by layer in a radial direction. A three-layer functionally graded material of Al/Al2O3 is fabricated with compositions of 10, 20, 30 vol.% Al2O3. The ceramic composition increases from the discs inner (centre to the outer. The combination of these materials can offer the ability to withstand high temperature conditions whilst maintaining strength in extreme environments.

  11. More on monitoring forest habitats: reply to Cutini et al. 2016 e Angelini et al. 2016

    Directory of Open Access Journals (Sweden)

    Urbinati C

    2016-12-01

    Full Text Available More on monitoring forest habitats: reply to Cutini et al. 2016 e Angelini et al. 2016. The authors reply to the clarification notes by Angelini et al. (2016a and by Cutini et al. (2016 concerning the “Manuals for monitoring species and habitats of EC interest (Directive 92/43/CEE in Italy: habitats” (Angelini et al. 2016b. They discuss about the role of ecosystem monitoring, the inclusive/exclusive feature of the 9210* habitat, the lack of information on forest spatial and chronological structure. The authors conclude fostering a synergic approach between vegetation and forest science experts in order to provide new and more advanced tools for monitoring, analysis, conservation and management of forest ecosystems in a changing environment.

  12. Production of Al nanocomposite reinforced by Fe-Al intermetallic, Al{sub 4}C{sub 3} and nano-Al{sub 2}O{sub 3} particles using wet milling in toluene

    Energy Technology Data Exchange (ETDEWEB)

    Razavi-Tousi, S.S., E-mail: ser105@mail.usask.ca [Islamic Azad University, Shahrood Branch, Shahrood (Iran, Islamic Republic of); Yazdani-Rad, R. [Materials and Energy Research Center, P.O. Box 31787/316, Karaj (Iran, Islamic Republic of); Manafi, S.A. [Islamic Azad University, Shahrood Branch, Shahrood (Iran, Islamic Republic of)

    2011-06-02

    Highlights: > Production of Al nanocomposite reinforced by Fe-Al intermetallic, Al{sub 4}C{sub 3} and nano-Al{sub 2}O{sub 3} particles using wet milling in toluene. > Production of Al{sub 4}C{sub 3} particles from mechanochemical reaction of Al with PCA. > Effect of second phase particles on sintering. - Abstract: Al matrix nanocomposites were produced by wet milling of Al and nano-alumina powders in a toluene media. X-ray diffraction patterns, inductively coupled plasma, carbon measurement analysis and scanning electron microscopy show that impurities introduced by decomposition of toluene and abrasion of balls and vials are uniformly dispersed in the Al matrix as Al{sub 4}C{sub 3} and Fe-Al intermetallic particles. Though producing homogenous nanocomposites, these second phase particles seem to have a retarding effect on densification of nanocomposite powders.

  13. The origin of Al(OH)(3)-rich and Al(13)-aggregate flocs composition in PACl coagulation.

    Science.gov (United States)

    Lin, Jr-Lin; Huang, Chihpin; Chin, Ching-Ju M; Pan, Jill R

    2009-09-01

    The composition of hydrolyzed Al species is essential for the understanding of coagulation with Al-based coagulants. Surface characteristics of flocs formed by coagulation with two distinct polyaluminum chloride (PACl) coagulants were identified. One commercial coagulant (PACl-C) with voluminous monomeric Al and colloidal Al(OH)(3) and a custom-made PACl (PACl-Al(13)) containing high Al(13) content were applied to destabilize kaolin particles. The flocs formed by PACl-C and PACl-Al(13) at neutral and alkaline pH ranges, respectively, were observed by FE-SEM and HR-TEM. In addition, the Al composition of these flocs was characterized by XPS and HR-XRD, and the imaging of Al(OH)(3) precipitates and Al(13) aggregates were conducted by SEM as well as tapping mode AFM in liquid system. The observations of flocs indicate that the morphology of Al(OH)(3)-rich flocs are fluffy and porous around the edge of flocs, while the Al(13)-aggregate flocs have a glossy contour and irregular structure. Both Al(OH)(3)-rich and Al(13)-aggregate flocs do not possess well-formed crystalline structure except for the Al(13)-like crystal exists in the Al(13)-aggregate flocs. Among Al(OH)(3) precipitates, colloidal Al(OH)(3) is micro-scale in size, while amorphous Al(OH)(3) is nano-scale. During the formation of Al(13) aggregates, some coiled and clustered Al(13) aggregates with smoother surface were observed. The XPS study on floc surface showed that tetrahedral (Al(IV)) /octahedral (Al(VI)) Al ratio on the surfaces of PACl-C and PACl-Al(13) flocs is 1:1.6 and 1:9.9, respectively. Of the in situ formed Al(13), almost half of Al-hydroxide precipitates on the surface of Al(OH)(3)-rich flocs possess the Al(IV) center. It also found that the irregularly aggregated Al(13) with a similar Al(13) crystalline structure subsists on the surface of Al(13)-aggregate flocs.

  14. Microscopic phase field study of the antisite defect of Ni3 Al in binary Ni-Al alloys

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The temporal evolution feature of a microscopic phase field model is utilized to study the antisite defects of L1 2-Ni 3 Al;this is quite different from other physicist’ interests.There are mainly two points in brief.Firstly,antisite defects Ni Al and Al Ni ,which are caused by the deviation from the stoichiometric Ni 3 Al,coexist in the Ni 3 Al phase.The surplus Ni atom in the Ni-rich side is prone to substitute Al thus producing the antisite defect Ni Al that maintains the stability of the L1 2 structure.In other case,the surplus Al atom in the Al-rich side is accommodated by a Ni sublattice consequently giving rise to antisite defect Al Ni .The calculated equilibrium occupancy probability of Ni Al is much higher than that of Al Ni .This point is generally in line with other theoretical and experimental works.Additionally,both Ni Al and Al Ni have a strong negative correlation to time step during the disorder-order transformation.Since the initial value of Ni Al and Al Ni on each site of the matrix is right at the concentration that we set,we can observe the decrease process of Ni Al and Al Ni from the initial disordered high anti-structure state to their respective equilibrium state,i.e.to the result of the ordering process further coarsening.

  15. Quantum Criticality in YFe2Al10

    Science.gov (United States)

    Gannon, William; Wu, Liusuo; Zaliznyak, Igor; Qiu, Yiming; Rodriguez-Rivera, Jose; Aronson, Meigan

    Quantum criticality has been studied in many systems, but there are few systems where observed scaling can be unified with a critical free energy F, or where the critical exponents form the basis for QC universality classes. We have identified a new layered material YFe2Al10 that shows remarkably strong QC behavior, where the scaling properties of the magnetic susceptibility and specific heat are consistent with the same F. Recent neutron scattering results paint a remarkable picture of the QC fluctuations in YFe2Al10. In contrast to classical transitions, where fluctuations are relatively long ranged and inelastic scattering is observed at a magnetic zone center, in YFe2Al10 the scattering is independent of wave vector in the critical plane, indicating that the fluctuations are spatially localized, while out of plane scattering indicates that the interplaner interactions are restricted to nearest neighbors. The dynamical susceptibility χ'' ~=E-2 , and is wholly temperature independent, indicating that E/T scaling is present, the signature of QC fluctuations. These results hint that the the criticality in YFe2Al10 is local, which until now has only been found in a few f-electron based compounds.

  16. The wobbler mouse, an ALS animal model

    DEFF Research Database (Denmark)

    Moser, Jakob Maximilian; Bigini, Paolo; Schmitt-John, Thomas

    2013-01-01

    This review article is focused on the research progress made utilizing the wobbler mouse as animal model for human motor neuron diseases, especially the amyotrophic lateral sclerosis (ALS). The wobbler mouse develops progressive degeneration of upper and lower motor neurons and shows striking...

  17. Silicon Strengthened CrAlVN Coatings

    Institute of Scientific and Technical Information of China (English)

    Qiang LI; Yue-xiu QIU; Bo LI; Dong-liang ZHAO; De-en SUN; De-hui LI

    2015-01-01

    CrAlVN coatings are of good intrinsic mechanical and tribological properties but lack of strength.Silicon can provide nitride coating high strength and excellent oxidation resistance.Logically,the combination of CrAlVN and Si should provide a good candidate for dry machining.The effect of silicon content on CrAlSiVN coating′s me-chanical,tribological properties and oxidation resistance was investigated.The coatings were deposited on cemented tungsten carbide and Si wafer (100)substrates in an in-line magnetron sputtering system.Grazing incidence X-ray diffractometer,scanning electron microscopy,atomic force microscopy,transmission electron microscopy,electron probe micro-analyzer,X-ray photoelectron spectroscopy and Auger electron spectroscopy were employed to charac-terize the microstructure and chemistry.Nanoindentation and ball-on-disc tribo-tester were used in characterization of the mechanical and tribological properties.Incorporating with silicon,the CrAlVN coating was strengthened (hard-ness:21.2 GPa up to 38.7 GPa);even after 2 h exposure to 700 ℃ in air,the hardness still maintains at 11.0 GPa.

  18. Everyday Life with ALS: A Practical Guide

    Science.gov (United States)

    ... A Practical Guide 71 pressure level with a variable volume of air on a timed cycle. A ... Support Groups,” MDA/ALS Newsmagazine, November-December 2009 “Sleep Aids: Low-Tech Strategies for Improving Sleep Comfort,” ...

  19. U-ALS: A Ubiquitous Learning Environment

    Science.gov (United States)

    Piovesan, Sandra Dutra; Passerino, Liliana Maria; Medina, Roseclea Duarte

    2012-01-01

    The diffusion of the use of the learning virtual environments presents a great potential for the development of an application which meet the necessities in the education area. In view of the importance of a more dynamic application and that can adapt itself continuously to the students' necessities, the "U-ALS" (Ubiquitous Adapted Learning…

  20. Niedermolekulare Verbindungen aus Spinnen als chemische Sensoren

    DEFF Research Database (Denmark)

    Olsen, Christian Adam; Kristensen, Anders S.; Strømgaard, Kristian

    2011-01-01

    sie als Leitstrukturen für die Entwicklung, Synthese und biologische Untersuchung synthetischer Analoga verwendet. Weit weniger erforscht sind hingegen Verbindungen, die der Kommunikation von Spinnen dienen. Vor kurzem wurden jedoch auf dem Gebiet der Pheromone und Allomone aus Spinnen neue...

  1. Ibn al-Haytham and psychophysics.

    Science.gov (United States)

    Aaen-Stockdale, Craig

    2008-01-01

    Persian scholar Ibn al-Haytham ('Alhazen') has rightly been credited with many advances in optics and vision science, but recent spurious claims that he is the 'founder of psychophysics' rest upon unsupported assertions, a conflation of psychophysics with the wider discipline of psychology, and semantic arguments over what it is to 'found' a school of thought.

  2. The Science of al-Biruni

    CERN Document Server

    Sparavigna, Amelia Carolina

    2013-01-01

    Al-Biruni (973-1048) was one of the greatest scientists of all times. He was an astronomer, mathematician and philosopher, and studied physics and natural sciences. In this paper, we will discuss some of his experimental methods and some instruments he used.

  3. Management of respiratory symptoms in ALS.

    LENUS (Irish Health Repository)

    Hardiman, Orla

    2012-02-01

    Respiratory insufficiency is a frequent feature of ALS and is present in almost all cases at some stage of the illness. It is the commonest cause of death in ALS. FVC is used as important endpoint in many clinical trials, and in decision-making events for patients with ALS, although there are limitations to its predictive utility. There are multiple causes of respiratory muscle failure, all of which act to produce a progressive decline in pulmonary function. Diaphragmatic fatigue and weakness, coupled with respiratory muscle weakness, lead to reduced lung compliance and atelectasis. Increased secretions increase the risk of aspiration pneumonia, which further compromises respiratory function. Bulbar dysfunction can lead to nutritional deficiency, which in turn increases the fatigue of respiratory muscles. Early recognition of respiratory decline and symptomatic intervention, including non-invasive ventilation can significantly enhance both quality of life and life expectancy in ALS. Patients with respiratory failure should be advised to consider an advance directive to avoid emergency mechanical ventilation.

  4. Management of respiratory symptoms in ALS.

    LENUS (Irish Health Repository)

    Hardiman, Orla

    2011-03-01

    Respiratory insufficiency is a frequent feature of ALS and is present in almost all cases at some stage of the illness. It is the commonest cause of death in ALS. FVC is used as important endpoint in many clinical trials, and in decision-making events for patients with ALS, although there are limitations to its predictive utility. There are multiple causes of respiratory muscle failure, all of which act to produce a progressive decline in pulmonary function. Diaphragmatic fatigue and weakness, coupled with respiratory muscle weakness, lead to reduced lung compliance and atelectasis. Increased secretions increase the risk of aspiration pneumonia, which further compromises respiratory function. Bulbar dysfunction can lead to nutritional deficiency, which in turn increases the fatigue of respiratory muscles. Early recognition of respiratory decline and symptomatic intervention, including non-invasive ventilation can significantly enhance both quality of life and life expectancy in ALS. Patients with respiratory failure should be advised to consider an advance directive to avoid emergency mechanical ventilation.

  5. Creative Commons : Erfgoedinstelling als digitaal curator.

    NARCIS (Netherlands)

    Hoorn, Esther

    2008-01-01

    Zijn Creative Commons-licenties een ver-van-mijn-bed-show voor erfgoedinstellingen? Integendeel, betoogt Esther Hoorn. De instellingen kunnen ze gebruiken als ze rechthebbende zijn. Maar belangrijker nog: door het gebruik van deze licenties te stimuleren kunnen ze een spin in het web van netwerken r

  6. Colombia frente al manejo del Presupuesto Nacional

    Directory of Open Access Journals (Sweden)

    Germán Enrique Reyes Forero

    2009-07-01

    Colombia pasa de 38 puntos en el 2007 a 46 puntos en el 2009, mejoría que no se corresponde con los múltiples escándalos de corrupción; ésta mejoría responde al manejo de tecnicismos como se intentará aclarar en el presente articulo.

  7. Control al doping Compromiso de Colombia

    Directory of Open Access Journals (Sweden)

    Claudia Prieto

    2015-06-01

    Full Text Available Este documento da a conocer la importante noticia de la aprobación, por parte del Comité Olímpico Internacional (COl, de un laboratorio colombiano, para el control al doping, a la vez que aprovecha la oportunidad para ampliar alguna información sobre este tema.

  8. CALCULUL CINETOSTATIC AL MECANISMELOR PLANETARE CILINDRICE

    Directory of Open Access Journals (Sweden)

    Păun ANTONESCU

    2012-05-01

    Full Text Available În lucrare se prezintă o metodă analitică pentru calculul cinetostatic al mecanismului planetarmonomobil cu două roţi dinţate centrale. Se consideră mai întâi cazul general al schemelor cinematice cu douăroţi dinţate solidare tip satelit, în două variante practice (multiplicator şi reductor de turaţie. Este menţionatcazul particular al mecanismelor planetare cu o singură roată satelit cu angrenare dublă (exterioară şiinterioară. Pe baza modelului de analiză cinetostatică a mecanismului planetar monomobil cu două roţi dinţatecentrale, în finalul lucrării se abordează o problemă practică de calcul cinetostatic al unui mecanism planetarcilindric simplu folosit la capul de frezat pentru prelucrarea roţilor dinţate cilindrice cu dinţi curbi înhipocicloidă.

  9. Bulk nanocrystalline Al prepared by cryomilling

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Bulk nanocrystalline Al was fabricated by mechanically milling at cryogenic temperature (cryomilling) and then by hot pressing in vacuum. By using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), the microstructure evolution of the material during cryomilling and consolidation was investigated. With increasing the milling time, the grain size decreased sharply and reduced to 42 nm when cryomilled for 12 h. The grains had grown up, and the columnar grain was formed under the hot pressing and extrusion compared with the cryomilled powders. The grain size of as-extruded specimen was approximately 300-500 nm. The reason of high thermal stability of this bulk was attributed primarily to the Zener pinning from the grain boundary of the AlN arising from cryomilling and the solute drag of the impurity. Tensile tests show that the strength of nanocrystalline Al is enhanced with decreasing grain size. The ultimate tensile strength and tensile elongation were 173 MPa and 17.5%, respectively. It appears that the measured high strength in the cryomilled Al is related to a grain-size effect, dispersion strengthening, and dislocation strengthening.

  10. Al-Ghazali on Moral Education

    Science.gov (United States)

    Alavi, Hamid Reza

    2007-01-01

    Al-Ghazali (1058-1111 CE) is probably the most influential scholar, philosopher, theologian, legal expert, religious reformer and mystic in the history of Islam. Although he wrote extensively about education, and particularly about moral education, this writing is scattered through a number of different works and has received less scholarly…

  11. Contribución al Estudio de las Moscas Anastrephas en Colombia.

    Directory of Open Access Journals (Sweden)

    González Mendoza Rafael

    1952-11-01

    Full Text Available 1. Colombia tiene amplias posibilidades de desarrollar una industria frutícola floreciente dadas las excepcionales condiciones de ubicación geográfica, diversidad de climas y de suelos. 2. La deficiente producción frutera actual es el resultado de una reunión de factores adversos, entre los que resalta el desconocimiento de los problemas científicos que afectan a dicha industria. En este aspecto, los problemas fitosanitarios, abandonados y faltos de investigación, ocupan lugar preponderante. 3. Las moscas Anastrephas constituyen la plaga más importante de la fruticultura nacional, y por esta razón, un estudio sobre estos insectos es un tema de importancia. 4. Las principales "moscas de las frutas" pertenecen dentro de la familia Trypetidae, a los géneros: Dacus, Rhaglethis, Ceratitis, Dactrocera y Anastrepha. 5. Los nombres comunes con que se conocen las moscas Anastrephas varían de un país a otro y se relacionan particularmente con el lugar de origen de las distintas especies o la fruta determinada como preterida por la mosca en una localidad. En Colombia la denominación vernácula más difundida es la de "gusano de las frutas". También se nombra el insecto como "mosca o gusano del mango" o "gusano de la guayaba". 6. Los nombres científicos de las moscas distinguen a una, gran cantidad de especies. En Colombia, varios autores han reportado la existencia de las especies A.fraterculus, A. ludens, A. mombinpracoptans, A. pikeli y A. serpentina. Todas estas especies inciden en las regiones colombianas comprendidas entre 0 y 2000 metros de altura, es decir, en casi todas las regiones agrícolas importantes (frutales, café, cacao de temperaturas entre 14° y 30° C. 7. Las moscas Anastrephas están confinadas casi exclusivamente al continente americano entre las latitudes 27° N. y 35° S. Particularmente, la especie A. fraterculus, una de las más difundidas en Colombia, fué determinada por Wiedemann (1830

  12. Una ventana al mundo de Kafka.

    Directory of Open Access Journals (Sweden)

    Guillermo Sánchez Medina

    2003-03-01

    Full Text Available

    COMENTARIO AL LIBRO " EL MUNDO PSICOLÓGICO DE KAFKA" POR EL ACADÉMICO ADOLFO DE FRANCISCO ZEA.

     

    Fui invitado en forma comedida, por el doctor Adolfo De Francisco, para comentar su obra: "El Mundo Psicológico de Kafka". Respondí que no era literato y menos crítico de Kafka. Sin embargo, acepté
    hacerlo siendo consciente de las limitaciones que me acompañan y para las que pido de todos ustedes su consideración. Tenía sí el deseo al reto de lo incógnito.
    Además sus argumentos fueron contundentes, pues se referían al compromiso con la Academia y, sin decírmelo, era también con él en nuestra historia compartida. Mis motivaciones y expectativas personales conscientes eran múltiples para sumergirme en sus ideas que mueven el espíritu desde la piel a lo trascendente, de lo interno a lo externo y viceversa, y en que cada palabra puede ser objeto de análisis profundo, pues esa es su esencia. Por ejemplo cuando el doctor De Francisco se refiere a la sublimación y a la estética, a la política, a la religiosidad, a la burguesía, al campesinado, a la nobleza, al absolutismo, al arte o a la historia, a la cosmovisión sociológica y literaria, al psicoanálisis para afrontar la realidad interna y externa, entonces el autor penetra en el mundo de la fantasía y del psiquismo, para entender el simbolismo implícito de Kafka.
    Las motivaciones personales inconscientes, pertenecen a las tendencias irracionales de hundirme en espacios complejos para luego intentar'ordenarlos; en medio está
    la contratransferencia que me une con el autor Adolfo De Francisco y otra la que se refiere a la temática kafkiana...

  13. Wallada Bint al Mustakfi entre dos culturas

    Directory of Open Access Journals (Sweden)

    shreen Mahmoud Al Refai

    2013-10-01

    Full Text Available La princesa cordobesa Wallada Bint al Mustakfi bil-lah, hija del califa al Mustakfi Muhammad Ibn Abdel Rahman Ibn Obaidil-lah Ibn Al Nasir lidin Al-lah era una poetisa estimable, a quien los grandes poetas no podían superar. Era una mujer única, guapa y decente. Mantenía una relación sentimental con el  poeta y visir Ibn Zaydún. Dicha pasión, narrada por los poemas escritos por ambos amantes, se terminó por la separación debida a los celos, también de ambos;  al poeta le gustó la voz de una esclava de la princesa. Eso dio rabia a la última. Movido también por los celos, Ibn Zaydún dedicó una epístola satírica al visir Ibn Abdús, que estaba enamorado de Wallada. Tal hecho también irritó a la princesa. A pesar de tener amantes y admiradores, Wallada murió sin casarse al  día 2 de safar de 480 (o 484 de la Híjira pasando los ochenta años Me han llamado la atención el carácter tan culto, independiente y liberal de aquella mujer, su relación amorosa con Ibn Zaydún que no acabó felizmente y los muchos años que vivió sin casasre. Parece que la vida de la princesa hispano-musulmana llamó también la atención de muchos escritores árabes y españoles. Prueba de ello son varias obras literarias escritas en árabe y en español sobre Wallada e Ibn Zaydún. Por consiguiente, me resulta muy interesante realizar un estudio comparativo sobre este tema averiguando si, o no, la diferencia de culturas influiría en las opiniones  de los autores sobre la vida sentimental de aquella poetisa cordobesa.

  14. ELECTROLYSIS OF SWINE MANURE EFFLUENTS USING THREE DIFFERENT ELECTRODES Fe-Fe, Al-Al AND Fe-Al

    Directory of Open Access Journals (Sweden)

    S. Rahman

    2014-01-01

    Full Text Available Swine effluent with high organic strength need to be treated to make it suitable for applying to crop/pasture fields, or discharging to any waterways. Electrocoagulation is a relatively simpler and cheaper technique over biological and chemical treatment methods currently used to treat high-strength industrial and municipal wastewater. The performance of an electrocoagulation system mainly depends on the pH, Electrical Conductivity (EC of the medium, Chemical Oxygen Demand (COD loading rates and catalytic activity of the electrodes used. In this research, a study was conducted to compare the pollutant removal efficiencies of three electrodes (Fe-Fe, Al-Al and Fe-Al with three electric current levels (500, 1000 and 2000 mA while treating swine manure effluents. The electrochemical cell consisted of two parallel rectangular plates (90×25×1.5 mm of Iron (Fe-Fe, Aluminum (Al-Al and Iron-Aluminum (Fe-Al, later on described as hybrid electrodes; immersed in a beaker with 550 mL swine effluents and powered by a Direct Current (DC supply. All studies were conducted in batches at room temperature. In general, removal efficiencies were increased with increasing current densities and electrolysis times for electrodes evaluated. Aluminum electrodes outperformed iron and hybrid (iron-aluminum electrodes in removing Total Phosphorus (TP at all current density levels tested. Overall, use of hybrid electrodes resulted in better COD removal. For the same treatment times (1200 s at higher current density (21 mA cm-2, hybrid electrodes removed about 100% COD, which are about 1.9 and 1.3 times higher than those of aluminum and iron electrodes, respectively. Iron electrodes showed the highest removal efficiency (85% for Total Organic Carbon (TOC at 21 mA cm-2 current density and 1200 s treatment time. Overall, lower Specific Electrical Energy Consumptions (SEECs per kg of Pollutants (TP, COD and TOC were estimated for the aluminum

  15. Medien als Lernform und die Trimediale Redaktion

    Directory of Open Access Journals (Sweden)

    Wolf Hilzensauer

    2015-01-01

    Full Text Available Der vorliegende Artikel beschreibt ein Konzept für eine handlungsorientierte Medienpädagogik im Bildungsbereich. Im Mittelpunkt steht dabei die SO!-Campusredaktion, die als Methode für expansives Lernen die Möglichkeit bietet, unabhängig von Thema oder Medium die Verantwortung für den Lernprozess in die Hände der Lernenden zu legen. Der Dokumentation von Reflexion über den Lernprozess wird dabei eine besondere Bedeutung zugesprochen. Gleichzeitig werden unterschiedliche mediale Gestaltungsmöglichkeiten (Audio/Radio, Video/Fernsehen und Zeitung – sowohl als Print- als auch als Onlinemedium vorgestellt, die durch das Konzept BYOD – bring your own device – auch einfach und niederschwellig im Bildungskontext umsetzbar sind. Dadurch ergeben sich innovative Möglichkeiten, einen Lernprozess sichtbar zu machen und gleichzeitig eine Grundlage für eine alternative Leistungsbeurteilung anzubieten. Die SO!-Campusredaktion wird derzeit an der Pädagogischen Hochschule Salzburg in Kooperation mit dem Communitysender FS1 und der Radiofabrik entwickelt und erprobt. Community Medien nehmen als MedienpartnerInnen eine bedeutende Stellung ein: Durch ihren offenen Zugang zu Know How und Equipment sowie durch die Möglichkeit, Medienproduktionen über die verfügbaren Distibutionskanäle (Radiofrequenz oder Sendeplatz einer breiten Bevölkerung zugänglich zu machen, gewinnt die Medienpädagogik einen wichtigen Mehrwert in ihrer schulischen und außerschulischen Arbeit. (Dieser Artikel knüpft an den Artikel "BYOD, Smartphonefilme und webbasierte Videoschnittprogramme" der Medienimpulse, Ausgabe 2/2014, an.

  16. Wetting of polycrystalline SiC by molten Al and Al-Si alloys

    Science.gov (United States)

    Cong, Xiao-Shuang; Shen, Ping; Wang, Yi; Jiang, Qichuan

    2014-10-01

    The wetting of α-SiC by molten Al and Al-Si alloys was investigated using a dispensed sessile drop method in a high vacuum. In the Al-SiC system, representative wetting stages were identified. The liquid spreading was initially controlled by the deoxidation of the SiC surface and then by the formation of Al4C3 at the interface. The intrinsic contact angle for molten Al on the polycrystalline α-SiC surface was suggested to be lower than 90̊ provided that the oxide films covering the Al and SiC surfaces were removed, i.e., the system is partial wetting in nature. An increase in the Si concentration in liquid Al weakened the interfacial reaction but improved the final wettability. The role of the Si addition on the wetting was presumably attributed to its segregation at the interface and the formation of strong chemical bonds with the SiC surface.

  17. PRECIPITATION HARDENING IN B2-ORDERED NiAl BY Ni2AlTiCOMPOUND

    Institute of Scientific and Technical Information of China (English)

    W.H. Tian; K. Ohishi; M. Nemoto

    2001-01-01

    Microstructural variations and correlated hardness changes in B2-ordered NiAl containing fine precipitation of Ni2AlTi have been investigated by means of transmission electron microscopy (TEM) and hardness tests. The amount of age hardening is not large as compared to the large microstructural variations during aging. TEM observations have revealed that the L21-type Ni2AlTi precipitates keep a lattice coherency with the NiAl matrix at the beginning of aging. By longer periods of aging Ni2AlTi precipitates lose their coherency and change their morphology to the globular ones surrounded by misfit dislocations. The temperature dependence of the yield strength of precipitate-containing B2-ordered NiAl was investigated by compression tests over the temperature range of 873-1273K. The fine precipitation of Ni2AlTi was found to enhance greatly the yield strength and the high-temperature strength is comparison with that of superalloy Mar-M200.``

  18. Some TEM observations of Al2O3 scales formed on NiCrAl alloys

    Science.gov (United States)

    Smialek, J.; Gibala, R.

    1979-01-01

    The microstructural development of Al2O3 scales on NiCrAl alloys has been examined by transmission electron microscopy. Voids have been observed within grains in scales formed on a pure NiCrAl alloy. Both voids and oxide grains grew measurably with oxidation time at 1100 C. The size and amount of porosity decreased towards the oxide-metal growth interface. It was postulated that the voids resulted from an excess number of oxygen vacancies near the oxide-metal interface. Short-circuit diffusion paths were discussed in reference to current growth stress models for oxide scales. Transient oxidations of pure, Y-doped, and Zr-doped NiCrAl was also examined. Oriented alpha-(Al,Cr)2O3 and Ni(Al,Cr)2O4 scales often coexisted in layered structures on all three alloys. Close-packed oxygen planes and directions in the corundum and spinel layers were parallel. The close relationships between oxide layers provided a gradual transition from initial transient scales to steady state Al2O3 growth.

  19. Mechanochemical synthesis of Cu-Al and methyl orange intercalated Cu-Al layered double hydroxides

    Energy Technology Data Exchange (ETDEWEB)

    Qu, Jun, E-mail: forsjun@whut.edu.cn [School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070 (China); He, Xiaoman; Chen, Min; Hu, Huimin [School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070 (China); Zhang, Qiwu, E-mail: zhangqw@whut.edu.cn [School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070 (China); Liu, Xinzhong [College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118 China (China)

    2017-04-15

    In this study, a mechanochemical route to synthesize a Cu-Al layered double hydroxide (LDH) and a methyl orange (MO) intercalated one (MO-LDH) was introduced, in which basic cupric carbonate (Cu{sub 2}(OH){sub 2}CO{sub 3}) and aluminum hydroxide (Al(OH){sub 3}) with Cu/Al molar ratio at 2/1 was first dry ground for 2 h and then agitated in water or methyl orange solution for another 4 h to obtain the LDH and MO-LDH products without any heating operation. The prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetry (TG), Differential scanning calorimetry (DSC) and Scanning electron microscopy (SEM). The products showed high crystallinity phase of Cu-Al and MO intercalated Cu-Al LDH with no evident impurities, proving that the craft introduced here was facile and effective. The new idea can be applied in other fields to produce organic-inorganic composites. - Highlights: • A facile mechanochemical route to synthesize Cu-Al and MO intercalated Cu-Al LDH. • The products possesses high crystalline of LDH phase with no impure phases. • The dry milling process induces the element substitution between the raw materials. • The agitation operation helps the grain growth of LDH.

  20. Formation and stability of Al-Nd and Al-Nd-Fe metallic glasses

    Energy Technology Data Exchange (ETDEWEB)

    Battezzati, Livio (Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita di Torino, Via Pietro Giuria 9, 10125 Turin (Italy)); Baricco, Marcello (Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita di Torino, Via Pietro Giuria 9, 10125 Turin (Italy)); Antonione, Carlo (Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita di Torino, Via Pietro Giuria 9, 10125 Turin (Italy))

    1994-07-01

    Partially amorphous Al[sub 91]Nd[sub 9] and Al[sub 86]Nd[sub 9]Fe[sub 5] ribbons were prepared by melt spinning. Metastable crystalline phases were found in both alloys. Complete amorphization of Al[sub 86]Nd[sub 9]Fe[sub 5] was also achieved. Crystallization was monitored by differential scanning calorimetry (DSC). It occurs in two stages at 440 and 510 K for Al[sub 91]Nd[sub 9]. Al[sub 86]Nd[sub 9]Fe[sub 5] presented a eutectic crystallization at 550 K. Microscopy observations, combined with Johnson-Mehl-Avrami (JMA) analyses performed in isothermal DSC traces, showed that Al[sub 91]Nd[sub 9] transforms via growth on pre-existing crystals. Al[sub 86]Nd[sub 9]Fe[sub 5] transformed via heterogeneous nucleation on sites unevenly distributed through the ribbon. The fitting of isothermal peaks by means of the JMA equation was less satisfactory. The limits of this approach are discussed. ((orig.))