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Sample records for group activity sabana

  1. Morphological and functional diversity of primary producers group in savannas; Diversidad morfologica y funcional del grupo de productores primarios en sabanas

    Energy Technology Data Exchange (ETDEWEB)

    Medina, E [Instituto Venezolano de Investigaciones Cientificas (IVIC). Centro de Ecologia. Laboratorio de Ecofisiologia Vegetal, Altos de Pipe (Venezuela)

    1996-07-01

    The meaning of biological diversity for the operation and stability of natural ecosystems is matter of great theoretical and practical interest. The appearance and permanency of species in a given atmosphere indicates its capacity to compete with other species with similar habit and requirements, and to accumulate the resources that allow its reproduction. On the other hand, the coexistence of similar species in the same ecosystem allows to wonder if ever biological redundancy exists, that is to say, if several species coexist with the same function inside the ecosystem, so that the disappearance of one of them would not have biological significant consequences. A strategy to simplify the analysis of relationships between biodiversity and ecosystems operation is by grouping species with similar function, called functional groups. In this work the the primary producers functional group is analyzed, essentially superiors plants, in a savannas ecosystems. The analysis establishes that the gives the primary producers group is heterogeneous and complex, so much morphological as functionally: 1) the structural complexity and diversity forms of life in an savannas ecosystem are associated with the stratified exploitation of resources over (light) and under the floor (nourishment and water). Changes in diversity that affect the system structure will probably also affect its operations. 2 )Very similar morphological species can differ physiologically up to constitute production units with contrasting nutritional requirements. The echo-physiologic analysis of this differentiation can explain the habitat preferences that are naturally observed. 3) The long-time permanency of rare species, of low frequency, show the inability of dominant species to capture all the available resources. 4) The primary producers and the floor microorganisms have strong interactions. Changes in the community composition can generate significant changes in other community. These biotic interactions

  2. Determinación de la actividad lignocelulolítica en sustrato natural de aislamientos fúngicos obtenidos de sabana de pastoreo y de bosque secundario de sabana inundable tropical Determination of lignocellulolytic activity in a natural substrate of native fungi strains obtained from savanna and of secondary forest from a tropical flooded savanna

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    Martha Lucía Ortiz Moreno

    2010-12-01

    Full Text Available El objetivo de este trabajo fue identificar aislamientos de hongos ligninolíticos y celulolíticos que pudieran degradar desechos de cosecha y mejorar las características del suelo en los Llanos Orientales, se realizó un muestreo siguiendo la metodología de transepto y muestras integradas. Se obtuvo una cepa ligninolítica (005L Verticillium spp. y 72 cepas celulolíticas. La comparación de los usos del suelo (sabana de pastoreo y bosque secundario mostró que no existía una relación entre el número de géneros obtenidos y las características del suelo. Posteriormente, se realizó la cuantificación de la actividad celulolítica y ligninolítica de los aislamientos para identificar las cepas que posteriormente serían evaluadas en el sustrato natural pasto seco (Brachiaria spp.. Se encontraron dos cepas con alta actividad exoglucanasa (055C y 061C Penicillium spp. y una cepa con alta actividad endoglucanasa (019C Trichoderma spp. respecto al control Trichoderma viride. En el sustrato natural se evaluaron los consorcios de las cepas seleccionadas formados por pares: una ligninolítica y una celulolítica. Las pruebas mostraron que los aislamientos promisorios aumentaron su actividad enzimática en el sustrato pasto superando a los controles positivos (Pleurotus ostreatus para lignina y T. viride para celulosa y que los consorcios no afectaron la capacidad enzimática de las cepas que los formaban. Por lo tanto, se recomienda utilizar estos consorcios para el desarrollo de biofertilizantes acondicionadores del suelo, empleando especialmente el consorcio formado por las cepas 005L (Verticillium spp. y 055C (Penicillium spp., que mostró alta actividad ligninolítica y celulolítica.The aim of this work was to identify lignolytic and cellulolytic fungal strains capable of degrading harvest waste and thereby improving the soil characteristics of the eastern Llanos of Colombia. Sampling was carried out using the transept methodology and

  3. Evaluation of the ''Sabana de Bogota'' aquifer using isotopes techniques

    International Nuclear Information System (INIS)

    Torres, E.; Jimenez, G.; Obando, E.; Sanchez, L.; Alayon, E.

    1987-01-01

    Groundwater from the Sabana de Bogota area was studied by means of isotopic techniques such as isotope analysis, injection of tracers for determination of hydrogeological parameters, velocity measurements using tracers. These results combined with the ones obtained by conventional techniques were used to determine recharge area, origin, equipotencial lines and direction of groundwater. The results show that a combined application of classical and nuclear methods may establish rather reasonable hydrogeological concepts without investing much time and money

  4. A pollen diagram from “Laguna de la Herrera” (Sabana de Bogota)

    NARCIS (Netherlands)

    Hammen, van der T.; Gonzalez, E.

    1965-01-01

    The Laguna de La Herrera (alt. ca 2550 m) is a lake situated on the western border of the Sabana de Bogotá, near Mosquera (dept. of Cundinamarca, Colombia) (fig. 2). This part of the Sabana has a relatively dry climate (appr. 600—700 mm rainfall), as it lies in the rain-shadow of the hills that

  5. Actividad microbiana en suelos de sabanas de los Llanos Orientales de Venezuela convertidas en pasturas

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    Y Gómez

    2006-06-01

    Full Text Available Se determinó el efecto de la variabilidad temporal y de las prácticas de manejo agrícola sobre las propiedades químicas y parámetros bioquímicos en un típico suelo Ultisol de pasturas nativas e introducidas de las sabanas orientales de los Llanos de Venezuela. La variabilidad temporal, el manejo agrícola y el efecto interactivo de ambos factores, afectaron las propiedades químicas y los parámetros bioquímicos. El carbono orgánico total e hidrosoluble experimentaron una significativa disminución durante la estación lluviosa. La respiración basal, la amonificación de la arginina (AA y la hidrólisis del diacetato de fluorisceína (DAF mostraron que en esas sabanas existe una baja actividad microbiana. La transformación de sabanas nativas a sistemas de pasturas de B. brizantha y S. capitata, incrementaron el contenido de materia orgánica en el suelo. La AA, y la respiración basal fueron indicadores sensibles, con los cuales se pueden estimar cambios en la calidad del suelo y reflejar el efecto causado por la interacción de los cambios temporales y las prácticas de manejo.Microbial activity in Eastern Venezuelan savannas turned into grasslands. We studied the effects of season and management practices on chemical properties and biochemical parameters in a typical Ultisol soil of native and introduced pastures of the Eastern savannas of Venezuela. Sseason, soil management, and their interaction, significantly affected chemical properties and biochemical parameters. The total carbon and the water soluble carbon experienced a significant decrease during the wet pereiod. The basal respiration, the arginine ammonification (AA and the fluoriscein diacetate hydrolysis showed showed a relatively low microbial activity. The transformation of native savannas to pastures systems of B. brizantha and S. capitata increased the organic matter content in soil. The AA and the basal respiration were sensible indicators to estimate changes in soil

  6. 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

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    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

  7. Aves ocasionales en la Sabana de Bogotá

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    Borrero José Ignacio

    1946-08-01

    Full Text Available La altiplanicie andina conocida con el nombre de Sabana de Bogotá, situada en la llamada "tierra fría" de los Andes Orientales de Colombia, a 2600 metros sobre el nivel del mar y con temperatura media de 13o C., esta bordeada en todo su derredor por montañas cuya altura en ningún sitio se eleva a menos de 2700 metros y esto solamente en el lado occidental, hacia el valle del Magdalena. Sin embargo, es visitada con alguna frecuencia por aves propias de pisos climáticos más cálidos y aun del llamado "Tropical" o "tierra caliente". Por lo que se ha podido averiguar, las aves visitantes observadas hasta ahora proceden de las vertientes occidentales y del valle del Magdalena; ninguna, con la única posible excepción de Elanoides forticatus yetapa, viene de las faldas orientales que descienden hasta los llanos del Meta pues hacia este lado de la Sabana se hallan las montañas más altas, cuya mayor depresión -la de Chipaque- es de 3150 metros en el sitio por donde pasa la carretera de Bogotá a Villavicencio. Parece por lo tanto que este ramal de la cordillera constituye una barrera infranqueable para las aves que habitan en el oriente de Cundinamarca, mientras que el ramal occidental, de menor altura, no lo es para las que habitan en las vertientes que conducen al Magdalena.

  8. Group Activities for Math Enthusiasts

    Science.gov (United States)

    Holdener, J.; Milnikel, R.

    2016-01-01

    In this article we present three group activities designed for math students: a balloon-twisting workshop, a group proof of the irrationality of p, and a game of Math Bingo. These activities have been particularly successful in building enthusiasm for mathematics and camaraderie among math faculty and students at Kenyon College.

  9. Variación en la actividad microbiana por cambio de uso en suelos en sabanas, Llanos Orientales, Venezuela

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    Yrma Gómez

    2011-03-01

    Full Text Available En los llanos orientales de Venezuela la forma tradicional de uso de las sabanas de Trachypogon ha sido el pastoreo extensivo. La presión sobre éstas para obtener una mayor productividad animal ha estimulado la introducción de plantas exóticas para forrajes, tales como: Brachiaria brizantha y Andropogon gayanus. A pesar de que grandes extensiones de sabanas están siendo sometidas a este cambio de uso de la tierra, es escasa la información acerca del efecto que estas pasturas y la actividad de pastoreo tienen sobre la actividad microbiana en el suelo; por lo que el objetivo del presente estudio fue determinar el impacto que el pastoreo extensivo y la substitución de la cobertura nativa tienen sobre la actividad microbiana en estos suelos. El muestreo fue llevado a cabo durante las temporadas de sequía y lluvias. Los parámetros empleados para determinar cambios en la actividad microbiana fueron la respiración inducida por sustrato (RIS, la respiración basal (RB, la actividad de la deshidrogenasa (DHS, la hidrólisis del diacetato de fluorisceína (DAF y la amonificación de la arginina (AA. La similitud de las características estructurales de los suelos estudiados nos permite inferir, que las diferencias en los parámetros microbiológicos, están determinadas por las condiciones climáticas y el manejo del suelo. Los resultados muestran que en estos suelos existe una baja actividad microbiana. La temporada lluviosa provocó un incremento en todos los parámetros microbiológicos determinados. B. brizantha hizo un mayor aporte de carbono al suelo y promovió una mayor actividad heterotrófica. El pastoreo extensivo y la baja carga animal en las sabanas de los llanos orientales de Venezuela no afectaron la actividad microbiana del suelo.Soil microbial activity variation after land use changes in savannah, Llanos Orientales, Venezuela. In West plains of Venezuela, the traditional land use of the Trachypogon savannah, has been the

  10. Tres patos ocasionales en la Sabana de Bogotá y la Laguna de Fúquene

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    Borrero José Ignacio

    1944-12-01

    Full Text Available Agradezco al Dr. Armando Dugand la ayuda que se sirvió dispensarme para la presentación de este articulo. Creo de interes, para principiar, hacer una breve descripción de las condiciones de la Sabana de Bogotá y la Laguna de Fúquene, como localidades de paso o estacionamiento temporal para las especies migratorias de Anátidas.  La Sabana de Bogotá ocupa una vasta altiplanicie de unos 2000 kilómetros cuadrados a 2600 mts. de altura media, rodeada de montanas o cerros en toda su extensión y cruzada por pequeños rios. El rio Bogotá, que la atraviesa, forma en sus riberas y en casi toda su extensión grandes lagunas y pantanos apropiados para la llegada de los patos y otras aves acuáticas que anualmente vienen del Norte y otras regiones.

  11. La Sabana de Bogotá y su lago en el Pleniglacial Medio

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    Hamenn Thomas Van Der

    1986-12-01

    Full Text Available Durante buena parte del Pleistoceno (últimos  2.5 millones de años, la Sabana de Bogotá fue un lago. En su extensa historia presenta cambios frecuentes de nivel, especialmente durante las épocas interglaciales en las cuales el lago se contraía y dejaba una amplia zona pantanosa y boscosa entre su orilla y el pie de los cerros (VAN DER HAMMEN & GONZÁLEZ 1960-1963; HOOGHIEMSTRA,1984. Durante el último interglacial y en los interestadiales y estadiales de la parte temprana del último glacial existía un lago relativamente grande; en los bordes y especialmente en la parte baja de los valles que desembocan a la Sabana (como el de Tenjo se encontraba vegetación pantanosa, especialmente con Alnus acuminata (Aliso acompañado en ocasiones de Weinmannia sp. y Vallea stipularis.

  12. A Dynamic Policy for Grouping Maintenance Activities

    NARCIS (Netherlands)

    R.E. Wildeman (Ralph); R. Dekker (Rommert); A.C.J.M. Smit

    1995-01-01

    textabstractA maintenance activity carried out on a technical system often involves a system-dependent set-up cost that is the same for all maintenance activities carried out on that system. Grouping activities thus saves costs since execution of a group of activities requires only one set-up. Many

  13. Restos de megafauna asociadas a artefactos en la Sabana de Bogotá Restos de megafauna asociadas a artefactos en la Sabana de Bogotá

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    Correal Urrego Gonzalo

    1982-12-01

    Full Text Available Luego de una amplia exploración que cubrió el Valle del río Cauca y la Sabana de Bogotá, excavaciones recientes dentro del plan de estudios "Medio ambiente pleistocénico y el hombre prehistórico en Colombia", permitieron el hallazgo por primera vez en nuestro territorio de evidencias culturales precerámicas asociadas a fauna pleistocénica.  Las investigaciones aquí resumidas se adelantaron por el Instituto de Ciencias Naturales - Museo de Historia Natural- Facultad de Ciencias de la Universidad Nacional de Colombia, con el apoyo financiero de la Fundación de Investigaciones Arqueológicas del Banco de la República.At the archaelogical site TIBITÓ 1, Sabana de Bogotá, there have been found for the first time in Colombia stone and bone artifacts associated with the remains of mastodon (Haplomastodon sp.; Cuvieronius hyodon, horse (Equus amerhippus sp. and deer (Odocoileus virginianus. Bone fragments dated by the C-14 process gave an age of 11.740 ± 110 y BO (Late Pleistocene.

  14. HONGOS MICORRÍCICOS ARBUSCULARES DE SUELOS DE SABANA EN TABASCO, MÉXICO

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    Mepivoseth Castelán-Estrada

    2013-07-01

    Full Text Available Los suelos de sabana están bien representados en el estado de Tabasco, México, en ellos se cultiva maíz de manera extensiva y los hongos micorrícicos arbusculares (HMA pueden jugar un papel muy importante en la captación de nutrimentos. Hasta la fecha, sólo se ha reportado una especie de este grupo de hongos para los suelos con maíz en Tabasco, en razón de ello y debido a la trascendencia de estos microorganismos para la nutrición vegetal del maíz, los objetivos de este estudio fueron determinar la abundancia e identidad de las esporas de HMA, evaluar la colonización micorrícica en las raíces del maíz, así como la fertilidad de los suelos de cinco sabanas de Tabasco, México. Los resultados indican que las sabanas de Emiliano Zapata y Huimanguillo presentan suelos muy ácidos, mientras que en Balancán, Tenosique y Tacotalpa son neutros; en todos los casos la fertilidad va de baja a moderada. El número total de esporas en 100 g-1 de suelo seco fue de bajo (150 a alto (750; los porcentajes de colonización fueron muy altos (96-100%. Se encontraron 15 especies de HMA distribuidas en ocho géneros, lo que aumenta el número de especies registradas para Tabasco a 20; Glomus ambisporum y Sclerocystis sinuosa se encontraron en todas las sabanas, mientras que Funneliformis constrictus, la única especie reportada previamente para suelos con maíz en Tabasco no se registró ninguna.  La similitud entre las sabanas estudiadas es muy baja, presentándose una composición particular de especies en cada una de ellas.

  15. Small Group Activities for Introductory Business Classes.

    Science.gov (United States)

    Mundrake, George

    1999-01-01

    Describes numerous small-group activities for the following areas of basic business education: consumer credit, marketing, business organization, entrepreneurship, insurance, risk management, economics, personal finance, business careers, global markets, and government regulation. (SK)

  16. A Group Recommender System for Tourist Activities

    Science.gov (United States)

    Garcia, Inma; Sebastia, Laura; Onaindia, Eva; Guzman, Cesar

    This paper introduces a method for giving recommendations of tourist activities to a group of users. This method makes recommendations based on the group tastes, their demographic classification and the places visited by the users in former trips. The group recommendation is computed from individual personal recommendations through the use of techniques such as aggregation, intersection or incremental intersection. This method is implemented as an extension of the e-Tourism tool, which is a user-adapted tourism and leisure application, whose main component is the Generalist Recommender System Kernel (GRSK), a domain-independent taxonomy-driven search engine that manages the group recommendation.

  17. LAS COMUNIDADES VEGETALES DE LA SABANA DEL PARQUE NACIONAL EL PALMAR (ARGENTINA

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    William B. Batista

    2014-01-01

    Full Text Available El Parque Nacional El Palmar, Entre Ríos, preserva desde 1965 el mayor remanente de la sabana de Butia yatay , un ecosistema rico en especies amenazado por la actividad humana. Para estudiar el funcio - namiento de este ecosistema y gestionar su preservación, es necesario contar con una adecuada carac - terización de la heterogeneidad de su vegetación. En este trabajo presentamos una clasificación fitoso - ciológica de las comunidades vegetales de la sabana del Parque, describimos su estructura, composición y diversidad florística y detallamos su distribución en el paisaje. Con el fin de estratificar la obtención de datos, delimitamos primero las principales unidades geomorfológicas del paisaje. En la primavera de 1999 y en el verano siguiente, realizamos censos florísticos completos en 73 “stands” de sabana con diferentes historias de incendio, distribuidos en las diferentes unidades geomorfológicas. Utilizamos técnicas de análisis multivariado y clasificación numérica para agrupar los censos en comunidades y las especies en grupos florísticos. Finalmente, resumimos las diferencias entre las comunidades en un esca - lamiento multidimensional métrico. Obtuvimos 7 comunidades, descriptas por 20 grupos florísticos. El patrón de similitudes entre estas comunidades sugiere que la heterogeneidad florística se ordena según dos componentes, uno asociado con diferencias en la textura del suelo y el otro con diferencias en el régimen de humedad del suelo. Tres de las comunidades, afines entre sí, se distribuyen en las terrazas altas e interfluvios que conforman la matriz del paisaje, en correspondencia con diferencias graduales de topografía y suelos. Estas comunidades cambian sucesionalmente por el avance de la lignificación des - encadenada por la exclusión del ganado y mantenida por la escasez de incendios naturales. Las restantes cuatro comunidades aparecen estrictamente asociadas con afloramientos rocosos, dep

  18. Study of groundwater in the Chicu River basin, Sabana de Bogota, Colombia; Estudio de las aguas subterraneas de la cuenca del Rio Chicu, Sabana de Bogota, Colombia

    Energy Technology Data Exchange (ETDEWEB)

    Obando G, E; Jimenez B, G; Torres Q, E; Alayon C, E; Garavito B, F [Instituto de Ciencias Nucleares y Energias Alternativas, INEA, Bogota (Colombia)

    1995-10-01

    The Rio Chicu Valley aquifer system represents one of the many sub-systems constituting the hydrogeological system of the Sabana de Bogota. The valley has a structure of a graben, covered by a quaternary alluvial formation, which has a low permeability and therefore is an aquifer of poor characteristics. Due to the thickness of this aquifer (around 300 m), the tertiary aquifers are only exploited by few deep wells. The isotopic composition of water collected from the tertiary aquifer is depleted by 1 per mille in {delta}{sup 18}O and 8 per mille in {delta}D. This difference is due to the altitude effect of recharge, because the tertiary aquifers outcrop on the top of the surrounding hills. In some places, the stable isotope content of water sampled in wells tapping water from the quaternary aquifer is similar to the values found in the tertiary aquifer. This fact indicates the ascending leakage from deep horizons. A rather unique characteristics of the quaternary aquifer is that in the central part of the basin the dissolved inorganic carbon DIC is very high and shows a {delta}{sup 13}C values around +10 per mille vs PDB and {sup 14}C around 5-10 pmc. The positive values are probably related to decomposition of organic matter in anaerobic conditions. These values reflect a very low flow in the system and limited recharge. (author). 1 ref., 5 figs, 2 tabs.

  19. Pollution and health risk in urban areas of La Sabana River, Acapulco, Mexico

    International Nuclear Information System (INIS)

    Rodriguez Herrera, America; Olivier Salome, Branly; Lopez Velasco, Rocio; Barragan Mendoza, Maria del Carmen; Canedo Villareal, Roberto; Valera Perez, Miguel Angel

    2013-01-01

    We often find cities whose development is associated with the occupation of a river basin on with no public actions and policies to stop processes of environmental and social degradation caused by land use change. The case studies are two communities on the periphery of the city of Acapulco, influenced by insufficient infrastructure and lack of health and environment of the river La Sabana, which develop their lives in a degraded and polluted environment. The data provided confirm that respiratory and digestive tract diseases, recognized by WHO-as pollution-related diseases, are the most recurrent. However pollution also accelerates deterioration and environmental degradation, because it touches directly on the eutrophication of the lagoonal ecosystems of Tres Palos and Negra de Puerto Marques, generating biodiversity loss and effects on the quality of life of the population. The health risk mitigation, attention should focus on the situation of vulnerability in a holistic perspective

  20. Los horticultores de la Sabana Centro de Cundinamarca no tienen una organización moderna

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    Alberto Villate París

    2006-07-01

    Full Text Available ¿Cómo hacer para que un grupo de cultivadores de hortalizas cambien de una estructura de subsistencia a organización. ¿En forma de conglomerado como una red de productores que garantice una oferta de calidad nacional e internacional? En este artículo se resume la metodología aplicada y los principales resultados obtenidos, gracias a la aplicación de herramientas de prospectiva, así como análisis de modelos de redes económicas, teorías de dinámica empresarial, estudio de variables de entorno nacional y de tendencias internacionales sobre los productos hortícolas y en una región seleccionada como fueron los municipios de la provincia de Sabana Centro en Cundinamarca.

  1. From Cannibalism to Active Motion of Groups

    Science.gov (United States)

    Romanczuk, Pawel; Schimansky-Geier, Lutz

    2008-03-01

    The detailed mechanisms leading to collective dynamics in groups of animals and insect are still poorly understood. A recent study by Simpson et. al. suggests cannibalism as a driving mechanism for coordinated migration of mormon crickets [1]. Based on this result we propose a simple generic model of brownian particles interacting by asymmetric, non-conservative collisions accounting for cannibalistic behavior and the corresponding avoidance strategy. We discuss our model in one and two dimensions and show that a certain type of collisions drives the system out of equilibrium and leads to coordinated active motion of groups.[1] Stephen J. Simpson, Gregory A. Sword, Patrick D. Lorch and Iain D. Couzin: Cannibal crickets on a forced march for protein and salt, PNAS, 103:4152-4156, 2006

  2. Activities of Gaz de France Group

    International Nuclear Information System (INIS)

    Anon.

    2003-01-01

    The Board of Directors of Gaz de France approved the Group's consolidated accounts for 2004. In a more dynamic economic environment than in 2003, the Gaz de France Group reports enhanced results and has continued to pursue its growth in Europe. Increase in net sales driven by sustained growth in sales (+ 8.9%): In 2004, net sales rose 8.9% compared with the 2003 financial year to reach a total of euro 18,129 m. This strong increase in business activities was driven by sustained growth in sales volumes both in France and Europe. Total Group sales volumes amounted to 730 TWh (approximately 66 billion cubic metres), equal to growth of 10.3%. Natural gas sales volumes increased by approximately 10% in France, and are almost 18% higher in Europe, notably in the United Kingdom, Italy, Belgium and the Netherlands. The Group has pursued the profitable development of its activities outside France. As a result, international activities account for 29% of total sales in 2004, against 23% in 2003. The contribution made by international subsidiaries - particularly those specializing in exploration and production - grew by a very substantial 44.3% to reach a total of euro 502 m in 2004. Energy and Services Offering Branch: this core business line, which includes natural gas and oil exploration and production, energy trading and sales, and services associated with the supply of energy, boasts net sales of euro 16,498 m, equal to growth of 10.8% compared with 2003. Infrastructures Branch: this division, which groups together all activities related to the management of transmission and distribution infrastructures in both the French domestic and international markets, generated net sales of euro 6,794 m in 2004, virtually unchanged from the previous year. This situation is the result of higher sales generated by the distribution subsidiaries operating outside France (+9.2%) offset by a decline in the sales performance of the Transmission, Storage and Distribution in France

  3. Mundo perdido, paraíso encontrado: lugar, identidad y producción en la Gran Sabana, Venezuela

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    Luis Fernando Angosto Ferrández

    2013-01-01

    Full Text Available Durante el siglo xx afloraron en la Gran Sabana las bases de una producción inserta en el sistema capitalista, pero aún hoy parte de sus habitantes ancestrales, indígenas pemón, mantienen una economía de subsistencia notablemente autónoma. Este trabajo examina, por una parte, cómo las narrativas exotizantes de lugar e identidad construidas en torno a la Gran Sabana y sus habitantes han contribuido a consolidar una reduccionista polarización analítica de esferas “indígenas” y “no-indígenas”; por otra parte, identifica focos materiales de diversificación estructural entre los pobladores de la Gran Sabana más allá de esas esferas, y reclama atención para dichos focos en la búsqueda de soluciones a los conflictos en la región.

  4. Test Blanket Working Group's recent activities

    International Nuclear Information System (INIS)

    Vetter, J.E.

    2001-01-01

    The ITER Test Blanket Working Group (TBWG) has continued its activities during the period of extension of the EDA with a revised charter on the co-ordination of the development work performed by the Parties and by the JCT leading to a co-ordinated test programme on ITER for a DEMO-relevant tritium breeding blanket. This follows earlier work carried out until July 1998, which formed part of the ITER Final Design Report (FDR), completed in 1998. Whilst the machine parameters for ITER-FEAT have been significantly revised compared to the FDR, testing of breeding blanket modules remains a main objective of the test programme and the development of a reactor-relevant breeding blanket to ensure tritium fuel self-sufficiency is recognized a key issue for fusion. Design work and R and D on breeding blanket concepts, including co-operation with the other Contacting Parties of the ITER-EDA for testing these concepts in ITER, are included in the work plans of the Parties

  5. AER Working Group B activities in 2001

    International Nuclear Information System (INIS)

    Darilek, P.

    2001-01-01

    Review of AER Working Group B Meeting in Czech Republic - Plzen is given. Regular meeting of Core Design Group was organized by SKODA JS, Inc. and held at Plzen-Bolevec, Czech Republic, May 21+22, 2001, together with Working Group A (Authors)

  6. AER Working Group B activities in 2010

    International Nuclear Information System (INIS)

    Darilek, P.

    2010-01-01

    Review of AER Working Group B Meeting in Modra - Harmonia, Slovakia is given. Regular meeting of Core Design Group was organized by VUJE, Inc. and held at Modra - pension Harmonia, Slovakia, April 20-22, 2010, together with Working Group A. Presented papers (see List of papers and List of participants) covered topics as follows. (Author)

  7. [Changes in fish communities of coral reefs at Sabana-Camagüey Archipelago, Cuba].

    Science.gov (United States)

    Claro, Rodolfo; Cantelar, Karel; Amargós, Fabián Pina; García-Arteaga, Juan P

    2007-06-01

    A comparison of fish community structure in the Sabana-Camagüey Archipelago (1988-1989 and 2000) using visual census surveys (eight belt transects 2x50 m in each site) suggests a notable decrease on species richness, and a two thirds reduction in fish density and biomass on coral reefs. This decrease in fish populations may be related to the alarming decrease of scleractinian coral cover, and an enormous proliferation of algae, which currently covers 70-80% of the hard substrate, impeding the recovery of corals and other benthic organisms. High coral mortalities occurred between the study periods, which correlate with the high temperatures caused by the ENSO events of 1995, 1997 and 1998. These events caused massive bleaching of corals and subsequent algae overgrowth. Evidence of nutrient enrichment from the inner lagoons and overfishing are also present. Collectively, these effects have provoked a marked degradation of reef habitats. These changes appear to have affected the availability of refuges and food for fishes, and may be constraining individual growth potential and population size.

  8. Promoting physical activity in socially vulnerable groups

    NARCIS (Netherlands)

    Herens, M.C.

    2016-01-01

    Background: In the Netherlands, inequalities in physical activity behaviour go hand in hand with socioeconomic inequalities in health. To promote physical activity effectively and equitably, participatory community-based physical activity interventions seem promising and are

  9. EDF Group: activity and sustainable development 2010

    International Nuclear Information System (INIS)

    2010-01-01

    After a map illustrating the worldwide dimension of EDF, and an interview of the EDF's chairman, this report presents and comments some sustainable development indicators for EDF activity in 2010. Then, after a presentation of the world energy context, it presents and comments EDF's main activities: energy production and engineering, network management, trading. It presents and comments the operational performance of the company in different countries (France, United Kingdom, Italy, and other countries) and evokes additional activities. The next chapter deals with human resources and with innovation and R and D activities. The last chapter presents governance structures and financial results

  10. Liquid effluent processing group. Activity details 1963

    International Nuclear Information System (INIS)

    1964-08-01

    This report first gives a quantitative overview of volumes of effluents of high activity, medium activity and low activity which passed through the department for effluent processing. It also makes the distinction between the shape or type of container of these effluents. A table indicates their origin and another indicates their destination. The β and α decontamination rates are determined, and the assessment of stored aqueous and organic effluents on the 31 December 1963 is given. The next part proposes an assessment of laboratory activities: control operations (input controls, control of processed effluent before discarding), controls related to processing (processing types, radiochemical and chemical dosing performed on effluent mixes before processing). Tables indicate the characteristics of medium activity effluents collected in 1963, the results of high activity liquid analysis, and Beryllium dosing results. A summary of ALEA processing, a table of the characteristics of stored oils and solvents are given. The third part reports data related to transport activities, and various works performed in the Saclay plant to improve exploitation conditions and results

  11. Mountain Biking with Groups: A "Safe" Activity?

    Science.gov (United States)

    Allen, Terry

    2001-01-01

    A survey mailed to 200 British mountain bike leaders found that rates of cycling accidents and injuries were greater in forests and woodlands than on terrain where a license is required to lead groups of young cyclists. Excessive speed was mentioned in most accidents, coupled with poor use of breaks in many cases. (SV)

  12. AER Working Group B activities in 2009

    International Nuclear Information System (INIS)

    Darilek, P.

    2009-01-01

    Regular meeting of Core Design Group was organized by SKODA JS a.s. in Plzen (Czech Republic) during the period of 4 to 6 May 2009. There were presented altogether 17 participants from 7 member organizations and 7 presentations were read. Presented papers covered topics as follows: 1) Two presentations dealt with upgrade of calculation and display tools. 2) Three presentations were devoted to benchmark calculations. 3) Two presentations informed about gradual improvement of fuel assembly and cycle for VVER-440 reactors

  13. DOING Physics--Physics Activities for Groups.

    Science.gov (United States)

    Zwicker, Earl, Ed.

    1984-01-01

    Describes an activity in which two pulleys are connected by a wire loop; when the bottom pulley is dipped into hot water, the pulleys rotate. Also suggests that students design/build a machine to propel a bean; the machine must use materials including one bean, two plastic straws, and two rubber bands. (JN)

  14. Activities of covariance utilization working group

    International Nuclear Information System (INIS)

    Tsujimoto, Kazufumi

    2013-01-01

    During the past decade, there has been a interest in the calculational uncertainties induced by nuclear data uncertainties in the neutronics design of advanced nuclear system. The covariance nuclear data is absolutely essential for the uncertainty analysis. In the latest version of JENDL, JENDL-4.0, the covariance data for many nuclides, especially actinide nuclides, was substantialy enhanced. The growing interest in the uncertainty analysis and the covariance data has led to the organisation of the working group for covariance utilization under the JENDL committee. (author)

  15. Individual and group dynamics in purchasing activity

    Science.gov (United States)

    Gao, Lei; Guo, Jin-Li; Fan, Chao; Liu, Xue-Jiao

    2013-01-01

    As a major part of the daily operation in an enterprise, purchasing frequency is in constant change. Recent approaches on the human dynamics can provide some new insights into the economic behavior of companies in the supply chain. This paper captures the attributes of creation times of purchase orders to an individual vendor, as well as to all vendors, and further investigates whether they have some kind of dynamics by applying logarithmic binning to the construction of distribution plots. It’s found that the former displays a power-law distribution with approximate exponent 2.0, while the latter is fitted by a mixture distribution with both power-law and exponential characteristics. Obviously, two distinctive characteristics are presented for the interval time distribution from the perspective of individual dynamics and group dynamics. Actually, this mixing feature can be attributed to the fitting deviations as they are negligible for individual dynamics, but those of different vendors are cumulated and then lead to an exponential factor for group dynamics. To better describe the mechanism generating the heterogeneity of the purchase order assignment process from the objective company to all its vendors, a model driven by product life cycle is introduced, and then the analytical distribution and the simulation result are obtained, which are in good agreement with the empirical data.

  16. Applied nuclear physics group - activities report. 1977-1997

    International Nuclear Information System (INIS)

    Appoloni, Carlos Roberto

    1998-06-01

    This report presents the activities conducted by the Applied Nuclear Physics group of the Londrina State University - Applied Nuclear Physics Laboratory - Brazil, from the activities beginning (1977) up to the end of the year 1997

  17. Variación en la actividad microbiana por cambio de uso en suelos en sabanas, Llanos Orientales, Venezuela

    Directory of Open Access Journals (Sweden)

    Yrma Gómez

    2011-03-01

    Full Text Available En los llanos orientales de Venezuela la forma tradicional de uso de las sabanas de Trachypogon ha sido el pastoreo extensivo. La presión sobre éstas para obtener una mayor productividad animal ha estimulado la introducción de plantas exóticas para forrajes, tales como: Brachiaria brizantha y Andropogon gayanus. A pesar de que grandes extensiones de sabanas están siendo sometidas a este cambio de uso de la tierra, es escasa la información acerca del efecto que estas pasturas y la actividad de pastoreo tienen sobre la actividad microbiana en el suelo; por lo que el objetivo del presente estudio fue determinar el impacto que el pastoreo extensivo y la substitución de la cobertura nativa tienen sobre la actividad microbiana en estos suelos. El muestreo fue llevado a cabo durante las temporadas de sequía y lluvias. Los parámetros empleados para determinar cambios en la actividad microbiana fueron la respiración inducida por sustrato (RIS, la respiración basal (RB, la actividad de la deshidrogenasa (DHS, la hidrólisis del diacetato de fluorisceína (DAF y la amonificación de la arginina (AA. La similitud de las características estructurales de los suelos estudiados nos permite inferir, que las diferencias en los parámetros microbiológicos, están determinadas por las condiciones climáticas y el manejo del suelo. Los resultados muestran que en estos suelos existe una baja actividad microbiana. La temporada lluviosa provocó un incremento en todos los parámetros microbiológicos determinados. B. brizantha hizo un mayor aporte de carbono al suelo y promovió una mayor actividad heterotrófica. El pastoreo extensivo y la baja carga animal en las sabanas de los llanos orientales de Venezuela no afectaron la actividad microbiana del suelo.

  18. Group-Based Active Learning of Classification Models.

    Science.gov (United States)

    Luo, Zhipeng; Hauskrecht, Milos

    2017-05-01

    Learning of classification models from real-world data often requires additional human expert effort to annotate the data. However, this process can be rather costly and finding ways of reducing the human annotation effort is critical for this task. The objective of this paper is to develop and study new ways of providing human feedback for efficient learning of classification models by labeling groups of examples. Briefly, unlike traditional active learning methods that seek feedback on individual examples, we develop a new group-based active learning framework that solicits label information on groups of multiple examples. In order to describe groups in a user-friendly way, conjunctive patterns are used to compactly represent groups. Our empirical study on 12 UCI data sets demonstrates the advantages and superiority of our approach over both classic instance-based active learning work, as well as existing group-based active-learning methods.

  19. Teaching Group Interdependence: A Campus Murder Mystery Activity

    Science.gov (United States)

    Minei, Elizabeth M.; Shearer Dunn, Karen

    2017-01-01

    Courses: Introduction to Communication; small group; interpersonal. Objectives: This single activity demonstrates: (1) how interdependence can lead to better group outcomes than individual outcomes can; (2) how diversity of knowledge from multiple contributors helps group functioning; and (3) how students can be introduced to members of the…

  20. Aves ocasionales en la Sabana de Bogotá y las Lagunas de Fúquene y de Tota

    Directory of Open Access Journals (Sweden)

    Borrero José Ignacio

    1947-12-01

    Full Text Available En números anteriores de esta misma revista publiqué algunas listas preliminares anotando la presencia ocasional de ciertas aves en la Sabana de Bogotá y la Laguna de Fúquene. A continuación hago mención de otras especies que he encontrado en las mismas localidades o también en la Laguna de Tota, Boyacá, a 3015 metros de altitud. Por considerarlo de importancia desde el punto de vista de la distribución geográfica, doy también datos referentes a la presencia de un ave migratoria norteamericana (Colymbus niqricollis californicus en la Laguna de Tota.

  1. ETSON strategic orientations on research activities. ETSON research group activity

    Energy Technology Data Exchange (ETDEWEB)

    Van Dorseelaere, J.P.; Barrachin, M. [IRSN, Saint Paul les Durance (France). Centre de Cadarache; Millington, D. [Wood RSD, Warrington (United Kingdom); and others

    2018-01-15

    In 2011, ETSON published the ''Position Paper of the Technical Safety Organizations: Research Needs in Nuclear Safety for Gen 2 and Gen 3 NPPs''. This paper, published only a few months after the Fukushima-Daiichi severe accidents, presented the priorities for R and D on the main pending safety issues. It was produced by the ETSON Research Group (ERG) that has the mandate of identifying and prioritizing safety research needs, sharing information on research projects in which ETSON members are involved, defining and launching new research projects and disseminating knowledge among ETSON members. Six years after this publication, many R and D international projects finished in diverse frames, and other ones have started. In particular a lot of work was done (and is going on..) on the analysis of the Fukushima-Daiichi severe accidents. Meanwhile a roadmap on research on Gen. 2 and 3 nuclear power plants (NPP), including safety aspects, was produced by the NUGENIA association, followed by a more detailed document as ''NUGENIA global vision''. It was also demonstrated that the ETSON R and D priorities were consistent with the implementation of the 2014 Euratom Directive on safety of nuclear installations.

  2. Sustainable Transportation Systems Research Group: Ongoing and Past Activities

    OpenAIRE

    Gkritza, Konstantina "Nadia"; Hurtado, Davis Chacon; Gkartzonikas, Christos; Ke, Yue; Losada, Lisa L

    2017-01-01

    This presentation describes the ongoing and past activities of the Sustainable Transportation Systems Research (STSR) group at Purdue University (https://engineering.purdue.edu/STSRG). The STSR group aims to achieve green, safe, efficient, and equitable transportation systems by studying and modeling transportation externalities, using state of the art statistical, econometric, and economic analysis tools.

  3. Applying an Activity System to Online Collaborative Group Work Analysis

    Science.gov (United States)

    Choi, Hyungshin; Kang, Myunghee

    2010-01-01

    This study determines whether an activity system provides a systematic framework to analyse collaborative group work. Using an activity system as a unit of analysis, the research examined learner behaviours, conflicting factors and facilitating factors while students engaged in collaborative work via asynchronous computer-mediated communication.…

  4. Problem-Based Group Activities for Teaching Sensation and Perception

    Science.gov (United States)

    Kreiner, David S.

    2009-01-01

    This article describes 14 problem-based group activities for a sensation and perception course. The intent was to provide opportunities for students to practice applying their knowledge to real-world problems related to course content. Student ratings of how effectively the activities helped them learn were variable but relatively high. Students…

  5. Blood-group-Ii-active gangliosides of human erythrocyte membranes

    International Nuclear Information System (INIS)

    Feizi, T.; Childs, R.A.; Hakomori, S.-I.; Powell, M.E.

    1978-01-01

    More than ten new types of gangliosides, in addition to haematoside and sialosylparagloboside, were isolated from human erythrocyte membranes. These were separated by successive chromatographies on DAEA-Sephadex, on porous silica-gel columns and on thin-layer silica gel as acetylated compounds. Highly potent blood-group-Ii and moderate blood-group-H activities were demonstrated in some of the ganglioside fractions. The gangliosides incorporated into chlolesterol/phosphatidylcholine liposomes stoicheiometrically inhibited binding of anti-(blood-group-I and i) antibodies to a radioiodinated blood-group-Ii-active glycoprotein. The fraction with the highest blood-group-I activity, I(g) fraction, behaved like sialosyl-deca- to dodeca-glycosylceramides on t.l.c. Certain blood-group-I and most of the i-determinants were in partially or completely cryptic form and could be unmasked by sialidase treatment. Thus the I and i antigens, which are known to occur on internal structures of blood-group-ABH-active glycoproteins in secretions, also occur in the interior of the carbohydrate chains of erythrocyte gangliosides. (author)

  6. Hidden Markov models for the activity profile of terrorist groups

    OpenAIRE

    Raghavan, Vasanthan; Galstyan, Aram; Tartakovsky, Alexander G.

    2012-01-01

    The main focus of this work is on developing models for the activity profile of a terrorist group, detecting sudden spurts and downfalls in this profile, and, in general, tracking it over a period of time. Toward this goal, a $d$-state hidden Markov model (HMM) that captures the latent states underlying the dynamics of the group and thus its activity profile is developed. The simplest setting of $d=2$ corresponds to the case where the dynamics are coarsely quantized as Active and Inactive, re...

  7. Discriminative latent models for recognizing contextual group activities.

    Science.gov (United States)

    Lan, Tian; Wang, Yang; Yang, Weilong; Robinovitch, Stephen N; Mori, Greg

    2012-08-01

    In this paper, we go beyond recognizing the actions of individuals and focus on group activities. This is motivated from the observation that human actions are rarely performed in isolation; the contextual information of what other people in the scene are doing provides a useful cue for understanding high-level activities. We propose a novel framework for recognizing group activities which jointly captures the group activity, the individual person actions, and the interactions among them. Two types of contextual information, group-person interaction and person-person interaction, are explored in a latent variable framework. In particular, we propose three different approaches to model the person-person interaction. One approach is to explore the structures of person-person interaction. Differently from most of the previous latent structured models, which assume a predefined structure for the hidden layer, e.g., a tree structure, we treat the structure of the hidden layer as a latent variable and implicitly infer it during learning and inference. The second approach explores person-person interaction in the feature level. We introduce a new feature representation called the action context (AC) descriptor. The AC descriptor encodes information about not only the action of an individual person in the video, but also the behavior of other people nearby. The third approach combines the above two. Our experimental results demonstrate the benefit of using contextual information for disambiguating group activities.

  8. CAMBIOS EN EL ALMACENAMIENTO DE NITRÓGENO Y AGUA EN EL SUELO DE UN MATORRAL DESÉRTICO TRANSFORMADO A SABANA DE BUFFEL (Pennisetum ciliare (L. Link

    Directory of Open Access Journals (Sweden)

    Hernán Celaya Michel

    2015-01-01

    Full Text Available El cambio de uso de suelo es uno de los principales factores de la degradación de los ecosistemas naturales, al modificar los procesos de transferencia de nitrógeno y agua reduciendo su productividad. En el presente trabajo, se describe cómo la transformación de matorrales desérticos a sabanas de zacate buffel en la región central de Sonora (RCS afecta dichos almacenes de recursos del suelo. Para entenderlo, se seleccionaron parcelas en el matorral bajo el dosel de árboles de Olneya tesota (NA y espacios abiertos sin cobertura vegetal aparente (NI, y en la sabana de buffel, bajo la misma especie de árbol (SA, inter-espacio (SI y bajo el pasto buffel (SB. Se analizó el nitrógeno total y las formas disponibles de este nutrimento en el suelo, así como contenido de agua en el suelo a diferentes profundidades durante cuatro años (2010 al 2013. Se encontró una pérdida anual de 12.5 kg N ha-1 debido a la transformación del ecosistema natural dominado por árboles y arbustos que generan islas de fertilidad e inter-espacios, a una sabana dominada por buffel e inter-espacios a sabana. La humedad del suelo indica que en la parte superficial del suelo, los espacios abiertos tienen más humedad, pero en la parte profunda de 150 a 200 cm la cubierta vegetal de los árboles y buffel almacenan más agua. Los resultados sugieren que el cambio de matorrales a sabanas de buffel ha disminuido los reservorios de nitrógeno y agua, e impactado las propiedades físicas del suelo, la fertilidad, y los reservorios hídricos del suelo. El estudio sugiere que los cambios espaciales y temporales en nitrógeno y agua en el suelo repercutirán de manera importante en el balance hidrológico y funcionamiento del ecosistema transformado.

  9. Activity report of the Neutrino Research Group. Year 2006

    International Nuclear Information System (INIS)

    2007-01-01

    For the last two decades, neutrino physics has been producing major discoveries including neutrino oscillations. These results gave clear confirmation that active neutrinos oscillate and therefore have mass with three different mass states. This is a very important result showing that the Minimal Standard Model is incomplete and requires an extension which is not yet known. The neutrino research field is very broad and active, at the frontier of today's particle physics. The Neutrino Research Group (GDR) was created in January 2005 with the aim of gathering CEA and CNRS research teams working on Neutrino Physics on experimental or theoretical level. This document is the 2006 activity report of the research group, two years after its creation. It presents the results of the 5 working groups: 1 - Determination of neutrino parameters; 2 - Physics beyond the standard model; 3 - Neutrinos in the universe; 4 - Accelerators, detection means, R and D and valorisation; 5 - Common tools to all working groups. The proposed neutrino physics road-map and the actual and future short-, medium- and long-term projects are presented in appendixes. The Neutrino research group organization, the Memphys specific mission group, the research group participating laboratories and teams, as well as the Memphys project are presented too

  10. Tomografía geoeléctrica: dos ejemplos en la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Briceno Guarupe Luis Alberto

    2000-08-01

    Full Text Available

    With the new technologies about math algorithms and software interpretation to solve the inverse problem, two examples of electric tomography were done in two different places and over quaternary deposits that correspond to Sabana de Bogota. The first, placed, near the location of Tenjo, was done to see the behaviour of the geoelectrical model with low resistivity and electric contrast materials (alluvial deposits of Formaci6n Sabana. While the second, over deposits of fluvial-glacier origen, like Rio Tunjuelito's deposits, shows effects over high resistivity materials with great lateral variations of resistivity. The evaluation of the quality of data was made with lithologic columns in both cases, in general, the results were coherent and showed high resolution. The reached depths of investigation were 30% for the first example and 40%, for the second, situating the electrodes with Wenner amd Wenner-Sciumberguer arrays. Using the results of these two examples, clearly we can see that the depth of investigation depends on the media, the geometric array and the lenght of the section. This geophysic tool is very useful in shallow applications (100 m depth, and where high resolution and quality are needed.

    Con base a las nuevas tecnologías en exploración geoeléctrica en cuanto a algoritmos para resolver el problema inverso y software de interpretación, se hicieron dos secciones tomográficas o “imaging”. Los dos ejemplos se realizaron, en ubicaciones diferentes y sobre sedimentos no consolidados de edad cuaternaria. EI primero, ubicado en cercanias de Tenjo, se realizó para analizar el comportamiento del modelo geoeléctrico sobre materiales de baja resistividad

  11. Background and future activities of PBNCC's nuclear training working group

    International Nuclear Information System (INIS)

    Chong Hun Rieh; Kunmo Chung; Hamlin, K.W.

    1987-01-01

    This paper presents a review of the background and activities of the nuclear training working group of the Pacific Basin Nuclear Cooperation Committee. The working group has examined various mechanisms for regional cooperation including the development of aregional catalog of training programs and the conceptualization of sharing training facilities among nuclear operators in the region. The working group has focused its attention on the exchange of information on the on-going training programs, operator training facilities, available resources for training assistance and proposed cooperative schemes. These activities are expected to continue and will provide invaluable information for nuclear power programs in the Pacific Basin region. The group also reviewed problems and issues associated with developing regional cooperation. (author)

  12. Background and future activities of PBNCC's nuclear training working group

    International Nuclear Information System (INIS)

    Rieh, C.H.; Chung, K.; Hamlin, K.W.

    1988-01-01

    This paper presents a review of the background and activities of the nuclear training working group of the Pacific Basin Nuclear Cooperation Committee. The working group has examined various mechanisms for regional cooperation including the development of a regional catalog of training programs and the conceptualization of sharing training facilities among nuclear operators in the region. The working group has focused its attention on the exchange of information on the on-going training programs, operator training facilities, available resources for training assistance and proposed cooperative schemes. These activities are expected to continue and will provide invaluable information for nuclear power programs in the Pacific Basin region. The group also reviewed problems and issues associated with developing regional cooperation

  13. 2017 Military Services Gender Relations Focus Groups: Active Duty

    Science.gov (United States)

    2018-04-30

    Office of People Analytics Office of People Analytics (OPA) Defense Research, Surveys, and Statistics Center 4800 Mark Center Drive, Suite 06E22...Relations (2017 MSGR) Focus Groups among active duty members. This is the third6 administration of gender relations focus groups. This introductory ...Enlisted, Male “It is true statistically , a majority of sexual assaults there is alcohol or drugs. In the military, it’s into the alcohol more than

  14. Estudio Palinológico de los 35 mts. Superiores de la Sección Tarragona, Sabana de Bogotá Estudio Palinológico de los 35 mts. Superiores de la Sección Tarragona, Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Dueñas J. Hernando

    1979-12-01

    Full Text Available En el presente trabajo se da a conocer el resulrado del estudio palinológico de los 35 metros superiores de la sección Tarragona, localizada en la Sabana de Bogotá, a 2.560 metros sobre el nivel del mar. Se describen 2 géneros (Spirotremesporites, Striadyadosporites y 5 especies(Spirotremesporites simplex, Spirotremesporites multiplex, Spirotremesporites ecuatorialis, Striadyadosporites elongatus y Striadyadosporites constrictus de fungi fósil, 14 tipos de polen, 8 tipos de esporas triletes, 4 tipos de Pediastrum y un tipo especial de Chlorococcales. Con base en la relación de polen de elementos de páramo a polen de elementos de bosque (Pp/Pb y a la estrarigrafía, se dividió el diagrama depolen en 8 zonas climáticas (vegetación, con las cuales fue posible correlacionar la sección Tarragona con otras secciones levantadas en la Sabana de Bogotá y regiones aledañas. Utilizando esta correlación y las fechas de edad absoluta que se han obtenido en las diferentes secciones del área, fue posible efectuar una correlacion tentativa con las unidades cronoestratigráficas europeas.  Los 35 metros superiores de la sección Tarragona representan la historia geológica de por lo menos los últimos 500.000 años de la Sabana de Bogotá.In this study it is given the result of the palynological study of the uppermost 35 meters of the Tarragona section, located in the Sabana de Bogotá at an altitude of 2.560 meters above sea level.  It is described: 2 genus (Spirotremesporites, Striadyadosporites and 5 species (Spirotremesporites simplex, Spirotremesporites multiplex, Spirotremesporites ecuatorialis, Striadyadosporites elongatus and Striadyadosporites constrictus of fossil fungi, 14 types of pollen, 8 types of trilete spores, 4 types of Pediastrum and one special type of Chlorococcales.  On the basis of the relation, Pollen of paramo elements to Pollen of forest elements (Pp/Pb and the stratigraphy it was possible to divide the pollen diagram

  15. Non-routine activities in RP Group in 1998

    International Nuclear Information System (INIS)

    Hoefert, M.; Foerkel-Wirth, D.; Otto, T.; Silari, M.; Stevenson, G.R.

    1999-01-01

    This chapter describes activities not directly concerned with the daily routine. These activities are nevertheless an important part of the Group's work as they encompass new projects and developments that require, in most cases, profound studies to prove their feasibility with respect to the radiation protection issues involved. In addition, there are technical and organizational developments in a quest not only to keep the standard of radiation protection at CERN high, but to ensure its constant improvement. All these activities are documented in Divisional Reports, Internal Reports and Technical Memoranda, and are listed in the tables of this chapter

  16. Neutrino Research Group. 2011-2014 activity report

    International Nuclear Information System (INIS)

    2014-01-01

    For the last two decades, neutrino physics has been producing major discoveries including neutrino oscillations. These results gave clear confirmation that active neutrinos oscillate and therefore have mass with three different mass states. This is a very important result showing that the Minimal Standard Model is incomplete and requires an extension which is not yet known. The neutrino research field is very broad and active, at the frontier of today's particle physics. The Neutrino Research Group (GDR) was created in January 2005 with the aim of gathering CEA and CNRS research teams working on Neutrino Physics on experimental or theoretical level. This document is the 2011-2014 activity report of the research group, ten years after its creation. It presents the results of the 5 working groups: 1 - Determination of neutrino parameters; 2 - Physics beyond the standard model; 3 - Neutrinos in the universe; 4 - Accelerators, detection means, R and D and valorisation; 5 - Common tools to all working groups. The research group structure, participating laboratories and teams and the neutrino physics road-map are presented in appendixes

  17. Teacher educators' design and implementation of group learning activities

    NARCIS (Netherlands)

    De Hei, Miranda S.A.; Sjoer, Ellen; Admiraal, Wilfried; Strijbos, J.W.

    2016-01-01

    Group Learning Activities (GLAs) are a key ingredient of course designs in higher education. Various approaches for designing GLAs have been developed, featuring different design components. However, this has not yet resulted in clear guidelines for teachers on how to design GLAs. The purpose of

  18. Ovalbumin with Glycated Carboxyl Groups Shows Membrane-Damaging Activity

    Directory of Open Access Journals (Sweden)

    Ching-Chia Tang

    2017-02-01

    Full Text Available The aim of the present study was to investigate whether glycated ovalbumin (OVA showed novel activity at the lipid-water interface. Mannosylated OVA (Man-OVA was prepared by modification of the carboxyl groups with p-aminophenyl α-dextro (d-mannopyranoside. An increase in the number of modified carboxyl groups increased the membrane-damaging activity of Man-OVA on cell membrane-mimicking vesicles, whereas OVA did not induce membrane permeability in the tested phospholipid vesicles. The glycation of carboxyl groups caused a notable change in the gross conformation of OVA. Moreover, owing to their spatial positions, the Trp residues in Man-OVA were more exposed, unlike those in OVA. Fluorescence quenching studies suggested that the Trp residues in Man-OVA were located on the interface binds with the lipid vesicles, and their microenvironment was abundant in positively charged residues. Although OVA and Man-OVA showed a similar binding affinity for lipid vesicles, the lipid-interacting feature of Man-OVA was distinct from that of OVA. Chemical modification studies revealed that Lys and Arg residues, but not Trp residues, played a crucial role in the membrane-damaging activity of Man-OVA. Taken together, our data suggest that glycation of carboxyl groups causes changes in the structural properties and membrane-interacting features of OVA, generating OVA with membrane-perturbing activities at the lipid-water interface.

  19. The Impact of Militancy and Cult Groups' Activities on Rundele ...

    African Journals Online (AJOL)

    The study adopted expectancy theory as its theoretical framework of analysis, emphasizing that the cult groups and militants were motivated in their activities due to the expected rewards from their actions. The findings showed that Rundele as one of the communities in the Niger Delta region had intensive militants' and cult ...

  20. Learners’ views about cloud computing-based group activities

    Directory of Open Access Journals (Sweden)

    Yildirim Serkan

    2017-01-01

    Full Text Available Thanks to its use independently of time and place during the process of software development and by making it easier to access to information with mobile technologies, cloud based environments attracted the attention of education world and this technology started to be used in various activities. In this study, for programming education, the effects of extracurricular group assignments in cloud based environments on learners were evaluated in terms of group work satisfaction, ease of use and user satisfaction. Within the scope of computer programming education lasting eight weeks, a total of 100 students participated in the study including 34 men and 66 women. Participants were divided into groups of at least three people considering the advantages of cooperative learning in programming education. In this study carried out in both conventional and cloud based environments, between groups factorial design was used as research design. The data collected by questionnaires of opinions of group work were examined with quantitative analysis method. According to the study results extracurricular learning activities as group activity created satisfaction. However, perceptions of easy use of the environment and user satisfaction were partly positive. Despite the similar understandings; male participants were easier to perceive use of cloud computing based environments. Some variables such as class level, satisfaction, computer and internet usage time do not have any effect on satisfaction and perceptions of ease of use. Evening class students stated that they found it easy to use cloud based learning environments and became more satisfied with using these environments besides being happier with group work than daytime students.

  1. Case report: pulicosis por Ctenocephalides felis felis en ovinos y caprinos en la sabana de Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Efraín Benavides Ortiz

    2010-06-01

    Full Text Available In Colombia the rearing of hair sheep and goats are expanding in various regions for being an alternative for meat and milk production at competitive prices due to their adaptability and easiness to digest rough fodder. Among the ectoparasites that affect small ruminants traditionally are recognized the lice and the sheep keds Melophagus ovinus (Díptera: Hippoboscidae, however fleas are not included. Here the occurrence of the common cat flea Ctenocephalides felis felis (Díptera: Siphonaptera affecting sheep and goats in a farm at the Sabana de Bogotá are described an so there was performed an epidemiological and parasitological evaluation. The barn maintained animals in rotational grazing at an approximated stocking rate of 25 head/ha, receiving additional supplements of hay and silage. The presence of the flea was confirmed in sheep and goats, young and adult, as well as in dogs. Diverse degrees of anemia were evidenced but the association between flea infestation and anemia, or the presence of other anemia producing agents could not be studied. In the farm synthetic parasiticides are not used, extracts of Ruda (Ruta graveolens are administered to mitigate parasitosis, without major efficacy. Sheep and goat breeders in the tropics should consider flea infestation as an agent causing adverse animal welfare situations in their farms. Control should start from the knowledge of the life cycle of the flea, trying to interrupt it.

  2. Caracterización de procesos en empresas hortícolas de la sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Claudia Patricia Álvarez Ochoa

    2016-04-01

    Full Text Available Ante la firma de los tratados comerciales y la inminente entrada de productos extranjeros que competirán con la producción nacional es necesario realizar una evaluación de las empresas con miras a determinar si existen las condiciones que permitan asegurar la competitividad. El sector agropecuario es un sector muy fragmentado, donde predominan las pequeñas explotaciones de tipo familiar que no disponen de suficientes recursos y mucho menos de una gestión que encauce el actuar hacia el mejoramiento, pero para ello es necesario el estudio de las empresas pertenecientes a aquellos sectores que presentan ventajas competitivas con el fin de determinar su estado para así proponer modelos que permitan una mejor gestión. En este artículo se presenta un análisis de las empresas pertenecientes a uno de los sectores con posibilidades de inserción en mercados externos como es el caso de las productoras de hortalizas de la sabana de Bogotá, el cual describe las principales características de sus procesos gerenciales, operativos y de soporte evidenciando su estado y posible contribución al logro de los objetivos de las mismas.

  3. Notes of records about yellow-green vireo (vireo flavoviridis: vireonidae) at the Sabana de Bogota, Cundinamarca (Colombia)

    International Nuclear Information System (INIS)

    Acevedo Charry, Orlando A; Echeverri Mallarino, Laura

    2013-01-01

    The Yellow-green Vireo (Vireo flavoviridis) is migrant bird species, previously none reported to Cundinamarca Department. Distribution known in Colombia only includes localities below 1500 masl. Two individuals of the Yellow-green Vireo were observed at 2600 masl in the Universidad Nacional de Colombia Bogota Campus, at the Sabana de Bogota in Cundinamarca Department in 2011. In addition, we found 18 unpublished records for this species in the Cundinamarca Department above 2500 masl. Ten records were museum specimens (Instituto de Ciencias Naturales de la Universidad Nacional de Colombia, Vertebrate collection (Ornitology) Universidad de los Andes and Instituto de Investigacion en Recursos Biologicos Alexander von Humboldt Museum), and the other eight were birdwatching records. The oldest record was in 1964, but the great majority of records were collected between 2008 and 2013. We consider that the Yellow-green Vireo has been unnoticed in the Cundinamarca Department because of its morphological similarities with the Red-eye Vireo (V. olivaceus). Furthermore, the lack of review of scientific collections, and the deposition of specimens discontinuous there, make gap information about biodiversity distribution. Apparently, Yellow-green Vireo could be more common than expected above 1500 m during its migration, such as it was observed in at Cundinamarca Department.

  4. Utilización del modelo cam-clay modificado en suelos cohesivos de la sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Javier Fernando Camacho Tauta

    2004-01-01

    Full Text Available Con el fin de estudiar el comportamiento mecánico de arcillas típicas de la Sabana de Bogotá, se llevó a cabo un programa de investigación experimental en laboratorio que incluyó ensayos básicos de caracterización, consolidación unidimensional y compresión triaxial consolidada no drenada. De los resultados se obtuvieron los principales parámetros de resistencia y deformabilidad de acuerdo con la teoría del estado crítico. Estos parámetros permiten conformar un modelo de comportamiento bajo el régimen elastoplástico. Se utilizó el modelo Cam-Clay Modificado (CCM para reproducir las deformaciones resultantes para cada trayectoria de esfuerzos aplicada. Se compararon las curvas producidas por el modelo con respecto a los resultados experimentales, lo que permitió identificar bajo cuales condiciones el modelo simula mejor el comportamiento del suelo y sobre qué variables se debe trabajar para obtener un modelo constitutivo completo.

  5. Standardization activities of the Euratom Neutron Radiography Working Group

    International Nuclear Information System (INIS)

    Domanus, J.

    1982-06-01

    In 1979 a working group on neutron radiography was formed at Euratom. The purpose of this group is the standardization of neutron radiographic methods in the field of nuclear fuel. Activities of this Neutron Radiography Working Group are revised. Classification of defects revealed by neutron radiography is illustrated in a special atlas. Beam purity and sensitivity indicators are tested together with a special calibration fuel pin. All the Euratom neutron radiography centers will perform comparative neutron radiography with those items. The measuring results obtained, using various measuring aparatus will form the basis to formulate conclusions about the best measuring methods and instruments to be used in that field. Besides the atlas of neutron radiographic findings in light water reactor fuel, the Euratom Neutron Radiogrphy Working Group has published a neutron radiography handbook in which the neutron radiography installations in the European Community are also described. (author)

  6. COSPAR/PRBEM international working group activities report

    Science.gov (United States)

    Bourdarie, S.; Blake, B.; Cao, J. B.; Friedel, R.; Miyoshi, Y.; Panasyuk, M.; Underwood, C.

    It is now clear to everybody that the current standard AE8 AP8 model for ionising particle specification in the radiation belts must be updated But such an objective is quite difficult to reach just as a reminder to develop AE8 AP8 model in the seventies was 10 persons full time for ten years It is clear that world-wide efforts must be combined because not any individual group has the human resource to perform these new models by themselves Under COSPAR umbrella an international group of expert well distributed around the world has been created to set up a common framework for everybody involved in this field Planned activities of the international group of experts are to - Define users needs - Provide guidelines for standard file format for ionising measurements - Set up guidelines to process in-situ data on a common basis - Decide in which form the new models will have to be - Centralise all progress done world-wide to advise the community - Try to organise world-wide activities as a project to ensure complementarities and more efficiencies between all efforts done Activities of this working group since its creation will be reported as well as future plans

  7. Activity report of the Neutrino Research Group. Year 2010

    International Nuclear Information System (INIS)

    2011-01-01

    For the last two decades, neutrino physics has been producing major discoveries including neutrino oscillations. These results gave clear confirmation that active neutrinos oscillate and therefore have mass with three different mass states. This is a very important result showing that the Minimal Standard Model is incomplete and requires an extension which is not yet known. The neutrino research field is very broad and active, at the frontier of today's particle physics. The Neutrino Research Group (GDR) was created in January 2005 with the aim of gathering CEA and CNRS research teams working on Neutrino Physics on experimental or theoretical level. This document is the 2010 activity report of the research group, six years after its creation. It presents the results of the 5 working groups: 1 - Determination of neutrino parameters; 2 - Physics beyond the standard model; 3 - Neutrinos in the universe; 4 - Accelerators, detection means, R and D and valorisation; 5 - Common tools to all working groups. The proposed neutrino physics road-map and the actual and future short-, medium- and long-term projects are presented in appendixes

  8. [Health education for varicose ulcer patients through group activities].

    Science.gov (United States)

    da Silva, Jodo Luis Almeida; Lopes, Marta Julia Marques

    2006-06-01

    It is a report on the group activities carried out with carriers of varicose ulcer in a health unit in Porto Alegre, Rio Grande do Sul, Brazil. The varicose ulcer presents factors, besides the biological ones, which interfere in the cicatrization, in the relapse cases and in its effective resolution. The proposed activities aimed at producing behavior changes with the intention of achieving self-care, providing information, socializing the participants, and stimulating cooperation, searching for joint solutions, aggregating interdisciplinary spirit and improving the care. Two groups have been formed and a thematic schedule established. The results have showed higher adhesion to the treatment, behavioral changes, and adapted and more effective attitudes of the health team.

  9. ATLAS barrel hadron calorimeter. JINR - group activity (July - September 1995)

    International Nuclear Information System (INIS)

    Budagov, Yu.; Lebedev, A.; Kul'chitskij, Yu.

    1995-01-01

    Here we present a short report on the main results of the preparatory work for 0-module, to be manufactured at JINR. The reported period covers July - September 1995 JINR-group activity and includes the main topics considered by TILE-CAL community at September 1995 meeting at CERN. Many of JINR developed propositions have been included in 0-module production final technology. 2 refs., 1 tab

  10. R and D activities of the ESARDA NDA working group

    International Nuclear Information System (INIS)

    Guardini, S.; Bignan, G.

    1999-01-01

    The aim of this paper is to report the R and D activities of the ESARDA Working Group on Techniques and Standards for Non-Destructive Analysis (NDA), as well as to discuss the role and possibilities of the group in the modern R and D scenario in safeguards and non-proliferation. The main tasks of the ESARDA NDA Working have been identified as being to: Define needs for procedural standards and reference materials; Design and manage the production and characterisation of reference materials; Assess and contribute to improving the performances of NDA techniques; Set up and maintain a list of NDA instruments and methods currently used for Safeguards purposes; and, through the above activities, assist Operators and Safeguards Authorities in their duty of Safeguards implementation. Members and observers appointed to the working group represent plant operators, the nuclear industry, R and D laboratories, NDA instrument developers and both safeguards control authorities. The participation of major European plant operators and of the EURATOM Safeguards Directorate and IAEA has always been assured and contributes to the good outcome of the WG activities. The ongoing R and D activities of the NDA Working Group are: Monte Carlo performance intercomparisons; 242 Pu accuracy assessment and improvement; NDA Sampling errors; General NDA performance evaluations. Some milestones have recently been reached: The 242 Pu uncertainty improvement project is coming to an end with the issuing of a new isotopic correlation; The NCC 'reals' evaluation and the Monte Carlo round robin is producing its first results; The Uranium Enrichment Round Robin Exercise has been completed; The waste drum standards are being characterised and constructed: they will be available by spring 1998. The round robin amongst laboratories will then start: summer 1998. Future activities comprise, beside the above issues, technical problems linked with the new challenges posed by new regimes of safeguards and non

  11. Medical Student Perspectives of Active Learning: A Focus Group Study.

    Science.gov (United States)

    Walling, Anne; Istas, Kathryn; Bonaminio, Giulia A; Paolo, Anthony M; Fontes, Joseph D; Davis, Nancy; Berardo, Benito A

    2017-01-01

    Phenomenon: Medical student perspectives were sought about active learning, including concerns, challenges, perceived advantages and disadvantages, and appropriate role in the educational process. Focus groups were conducted with students from all years and campuses of a large U.S. state medical school. Students had considerable experience with active learning prior to medical school and conveyed accurate understanding of the concept and its major strategies. They appreciated the potential of active learning to deepen and broaden learning and its value for long-term professional development but had significant concerns about the efficiency of the process, the clarity of expectations provided, and the importance of receiving preparatory materials. Most significantly, active learning experiences were perceived as disconnected from grading and even as impeding preparation for school and national examinations. Insights: Medical students understand the concepts of active learning and have considerable experience in several formats prior to medical school. They are generally supportive of active learning concepts but frustrated by perceived inefficiencies and lack of contribution to the urgencies of achieving optimal grades and passing United States Medical Licensing Examinations, especially Step 1.

  12. Mining activities of the Cogema group; Activite miniere du groupe Cogema

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1996-12-31

    This brochure is a general presentation of the mining activities of the COGEMA group. COGEMA is specialized in the whole operations of the nuclear fuel cycle and is responsible for about 20% of the worldwide uranium production with the exploitation of French mines and its participation in the exploitation of mines abroad, mainly in Canada, USA, Niger and Gabon. This document is divided in seven chapters: the search for uranium ores and the mining prospecting, the uranium deposits and the worldwide market, the exploitation of uranium ores (techniques and mines exploited by the COGEMA group), the processing of ores, the radioactivity and the mining installations, the environmental protection and the rehabilitation of sites (environmental survey and management of mining sites), application of COGEMA`s know-how to other domains such as: gold ore processing, research and development studies, instrumentation and radioprotection, soils cleansing and sites rehabilitation. This brochure is illustrated with several photos and pictures. (J.S.).

  13. Prevalencia de infecciones por Chlamydia trachomatis y Neisseria gonorrhoeae en adolescentes de colegios de la provincia de Sabana Centro, Cundinamarca, Colombia

    OpenAIRE

    María Cecilia Paredes; Yenny Milena Gómez; Ana Marcela Torres; Marcela Fernández; María Belén Tovar

    2015-01-01

    Introducción. Las infecciones por Chlamydia trachomatis y Neisseria gonorrhoeae son las dos infecciones bacterianas de transmisión sexual más frecuentes en el mundo, principalmente en menores de 25 años, en cuya salud sexual, reproductiva y materno-infantil producen secuelas. Objetivo. Estimar la prevalencia de las infecciones por C. trachomatis y N. gonorrhoeae entre adolescentes en colegios de la provincia de Sabana Centro, Cundinamarca, Colombia. Materiales y métodos. Se hizo un estu...

  14. Biomasa fúngica y bacteriana como indicadoras del secuestro de C en suelos de sabanas sustituidos por pinares en Uverito, Venezuela

    Directory of Open Access Journals (Sweden)

    Magalis Zabala

    2010-09-01

    Full Text Available Cualquier transformación de un ecosistema natural a un sistema agrícola o forestal conduce a una modificación importante no sólo del pool del carbono total, sino también del carbono asociado con la biomasa microbiana. Su cuantificación es importante en la determinación del impacto de las prácticas agrícolas y el cambio de uso de la tierra sobre la calidad del suelo. El objetivo de este estudio fue determinar, a través del método de inhibición selectiva, la biomasa fúngica y bacteriana y la relación (H:B en suelos de sabana nativa sustituidos por pinares (Pinus caribaea var. hondurensis, para establecer si éstos parámetros son indicadores sensibles de cambios en el contenido de carbono en suelos de Uverito, Venezuela. La relación de aditividad del inhibidor (RAI y la inhibición total por efecto combinado del inhibidor (ITC se llevaron a cabo para determinar, si los inhibidores microbianos tuvieron actividad sobre otros organismos para los cuales éstos no estaban destinados. La cuantificación de la biomasa fúngica y bacteriana se llevó a cabo mediante el uso de la cycloheximida como inhibidor fúngico, y la estreptomicina y el cloranfenicol como inhibidores bacterianos. Esta investigación evidencia que este cambio de uso de la tierra ejerció un efecto significativo sobre la biomasa microbiana del suelo, y muestra que en el sistema de pinares existe una dominancia del componente fúngico, en contraste con la sabana nativa, en la cual domina la biomasa bacteriana. La sustitución de la sabana nativa por plantaciones de pino en Uverito, promueve un mayor secuestro del carbono en el suelo. Los valores de la relación de aditividad del inhibidor (RAI tanto para la sabana nativa como para el sistema de pinares, resultaron ambos >1.0. La inhibición total combinada (ITC resultó menor en el sistema de pinares; a partir de lo cual, es posible inferir que una elevada proporción de la biomasa microbiana fue afectada por la combinaci

  15. CAMBIOS EN EL ALMACENAMIENTO DE NITRÓGENO Y AGUA EN EL SUELO DE UN MATORRAL DESÉRTICO TRANSFORMADO A SABANA DE BUFFEL (Pennisetum ciliare (L.) Link)

    OpenAIRE

    Hernán Celaya Michel; Felipe García Oliva; Julio C. Rodríguez; Alejandro E. Castellanos Villegas

    2015-01-01

    El cambio de uso de suelo es uno de los principales factores de la degradación de los ecosistemas naturales, al modificar los procesos de transferencia de nitrógeno y agua reduciendo su productividad. En el presente trabajo, se describe cómo la transformación de matorrales desérticos a sabanas de zacate buffel en la región central de Sonora (RCS) afecta dichos almacenes de recursos del suelo. Para entenderlo, se seleccionaron parcelas en el matorral bajo el dosel de árboles de Olneya tesota (...

  16. Recent activities of the ESARDA working group on NDA

    International Nuclear Information System (INIS)

    Harry, R.J.S.

    1983-01-01

    The European Safeguards Research and Development Association, ESARDA, has one of the largest coordinated safeguards and development programs in the world. There are several working groups for specific R and D activities. One of these is the ''ESARDA Working Group on Techniques and Standards for non-Destructive Analysis''. The NDA working group has initiated the international project of the preparation of uranium oxide certified reference materials for the gamma spectrometric determination of the enrichment, which are made in a collaboration with the US NBS and the European Communities' Central Bureau for Nuclear Measurements, CBNM, at Geel. The possibility of a similar type of reference material for Pu isotopic abundance measurements is investigated at CBNM, and the pilot samples may become available for intercomparisons. Safeguards acceptability and users manual have been considered carefully. The working group has undertaken an intercomparison on the determination of plutonium isotopic ratios by gamma spectrometry, using NBS-SRM's-946, -947 and 948. A new exercise on 0,5 gram samples of seven different isotopic compositions samples will be executed under the name PIDIE (Plutonium Isotopic Determination Intercomparison Exercise)

  17. Influence of muscle groups' activation on proximal femoral growth tendency.

    Science.gov (United States)

    Yadav, Priti; Shefelbine, Sandra J; Pontén, Eva; Gutierrez-Farewik, Elena M

    2017-12-01

    Muscle and joint contact force influence stresses at the proximal growth plate of the femur and thus bone growth, affecting the neck shaft angle (NSA) and femoral anteversion (FA). This study aims to illustrate how different muscle groups' activation during gait affects NSA and FA development in able-bodied children. Subject-specific femur models were developed for three able-bodied children (ages 6, 7, and 11 years) using magnetic resonance images. Contributions of different muscle groups-hip flexors, hip extensors, hip adductors, hip abductors, and knee extensors-to overall hip contact force were computed. Specific growth rate for the growth plate was computed, and the growth was simulated in the principal stress direction at each element in the growth front. The predicted growth indicated decreased NSA and FA (of about [Formula: see text] over a four-month period) for able-bodied children. Hip abductors contributed the most, and hip adductors, the least, to growth rate. All muscles groups contributed to a decrease in predicted NSA ([Formula: see text]0.01[Formula: see text]-0.04[Formula: see text] and FA ([Formula: see text]0.004[Formula: see text]-[Formula: see text]), except hip extensors and hip adductors, which showed a tendency to increase the FA ([Formula: see text]0.004[Formula: see text]-[Formula: see text]). Understanding influences of different muscle groups on long bone growth tendency can help in treatment planning for growing children with affected gait.

  18. Insectos plagas y benéficos asociados al cultivo de mora (Rubus glaucus, benth en La Sabana, Madriz, Nicaragua

    Directory of Open Access Journals (Sweden)

    Edgardo Jiménez-Martínez

    2006-12-01

    Full Text Available LA MORA (RUBUS GLAUCUS, BENTH ES UNA PLANTA en proceso de domesticación que se cultiva en pequeñas parcelas. Es hospedera de muchos insectos plaga y enfermedades. En Nicaragua se establecieron plantaciones de mora desde hace unos tres años, como alternativa de diversificación de fincas cafetaleras en los departamentos de Madriz y Nueva Segovia. Hasta ahora no hay información formal sobre los principales insectos plaga y benéficos presentes en este cultivo, que está tomando gran importancia. Por ello, se hizo una investigación para describir la fluctuación poblacional de los insectos plaga y sus depredadores naturales, asociados a este cultivo. El estudio se realizó en la finca La Patasta, municipio La Sabana, departamento de Madriz, entre septiembre de 2004 y abril de 2005. El monitoreo se realizó semanalmente en cinco sitios específicos, mediante capturas manuales de especimenes, con ayuda de bolsas de plástico y vasos de vidrio con alcohol. Como resultado, se identificó y describió la fluctuación poblacional de insectos de las principales familias Scarabaeidae, Chrysomelidae, Curculionidae, Cantharidae, y de los órdenes Hemíptero (Cicadellidae, Pentatomidae, Miridae y Orthóptero (Acrididae y Tettigonidae. Igualmente, se identificó y describió la fluctuación poblacional de depredadores naturales de insectos de la familia Staphilinidae, Coccinelidae, Vespidae y Aracnidae, presentes en este cultivo.

  19. CARACTERIZACIÓN MOLECULAR PARCIAL DEL VIRUS DEL MOTEADO DEL CLAVEL (CarMV PRESENTE EN LA SABANA DE BOGOTÁ

    Directory of Open Access Journals (Sweden)

    Ana Yervid Rodríguez

    2000-12-01

    Full Text Available En el presente trabajo se realizó un estudio del virus moteado del clavel (CarMV, en el cual se analizaron con la prueba de ELISA muestras de clavel de diferentes variedades de la Sabana de Bogotá. Esta prueba indicó que el82% de las muestras analizadas eran positivas para el CarMV. El CarMV presente en las muestras positivas fue inoculado mecánicamente en plantas de clavel certificadas libres de virus. La partícula viral se purificó utilizando centrifugación en gradientes y colchones de sacarosa. La proteína de la cápside fue analizada por electroforesis SDS-PAGE, encontrándose una banda de proteína de masa molecular relativa aproximada de 38kDa. El tejido infectado con el CarMV se sometió a un proceso de extracción de RNA de doble cadena (dsRNA encontrándose de 3 a5 componentes electroforéticos cuyos tamaños fluctuaron aproximadamente entre 8.0 y 0.9 kpb. Este patrón de dsRNA pennitió diferenciar al menos 3 aislamientos virales. El análisis electroforético en geles de agarosa del RNA genómico de varios aislamientos virales, mostró una banda de peso molecular aproximado de 4.0 kb. El análisis del RNA genómico digerido con RNAsa TI pennitió diferenciar 2 grupos de patrones electroforéticos de los aislamientosestudiados.

  20. Activities of the PNC Nuclear Safety Working Group

    International Nuclear Information System (INIS)

    Kato, W.Y.

    1991-01-01

    The Nuclear Safety Working Group of the Pacific Nuclear Council promotes nuclear safety cooperation among its members. Status of safety research, emergency planning, development of lists of technical experts, severe accident prevention and mitigation have been the topics of discussion in the NSWG. This paper reviews and compares the severe accident prevention and mitigation program activities in some of the areas of the Pacific Basin region based on papers presented at a special session organized by the NSWG at an ANS Topical Meeting as well as papers from other sources

  1. Polycomb-group genes sustaining the stem cell activity

    International Nuclear Information System (INIS)

    Takihara, Yoshihiro

    2006-01-01

    Polycomb-group genes (PcG) have a role in constituting the cellular memory mechanisms through which the once expressed phenotypes during development are transmitted thereafter and this review describes, together with authors' findings of sustaining hematopoietic stem cell activity by the PcG products, what molecular bases, involving the control of histone code, are concerned in the memory. Recent investigations have gradually elucidated the outline of epigenetic control mechanisms of the memory: messages are set up as a histone code in the chromatin and the PcG complex recruited by recognition of the code regulates the chromatin structure leading to DNA transcription and maintenance of the phenotype. Proliferation of hematopoietic stem cells ex vivo will be possible if exact and detailed mechanisms for PcG are made clear in future. Such ex vivo techniques are especially awaited for marrow remodeling treatment of hematopoietic failure induced by radiation exposure. (T.I.)

  2. Neural activity reveals perceptual grouping in working memory.

    Science.gov (United States)

    Rabbitt, Laura R; Roberts, Daniel M; McDonald, Craig G; Peterson, Matthew S

    2017-03-01

    There is extensive evidence that the contralateral delay activity (CDA), a scalp recorded event-related brain potential, provides a reliable index of the number of objects held in visual working memory. Here we present evidence that the CDA not only indexes visual object working memory, but also the number of locations held in spatial working memory. In addition, we demonstrate that the CDA can be predictably modulated by the type of encoding strategy employed. When individual locations were held in working memory, the pattern of CDA modulation mimicked previous findings for visual object working memory. Specifically, CDA amplitude increased monotonically until working memory capacity was reached. However, when participants were instructed to group individual locations to form a constellation, the CDA was prolonged and reached an asymptote at two locations. This result provides neural evidence for the formation of a unitary representation of multiple spatial locations. Published by Elsevier B.V.

  3. Photovoltaic Reliability Group activities in USA and Brazil (Presentation Recording)

    Science.gov (United States)

    Dhere, Neelkanth G.; Cruz, Leila R. O.

    2015-09-01

    Recently prices of photovoltaic (PV) systems have been reduced considerably and may continue to be reduced making them attractive. If these systems provide electricity over the stipulated warranty period, it would be possible attain socket parity within the next few years. Current photovoltaic module qualifications tests help in minimizing infant mortality but do not guarantee useful lifetime over the warranty period. The PV Module Quality Assurance Task Force (PVQAT) is trying to formulate accelerated tests that will be useful towards achieving the ultimate goal of assuring useful lifetime over the warranty period as well as to assure manufacturing quality. Unfortunately, assuring the manufacturing quality may require 24/7 presence. Alternatively, collecting data on the performance of fielded systems would assist in assuring manufacturing quality. Here PV systems installed by home-owners and small businesses can constitute as an important untapped source of data. The volunteer group, PV - Reliable, Safe and Sustainable Quality! (PVRessQ!) is providing valuable service to small PV system owners. Photovoltaic Reliability Group (PVRG) is initiating activities in USA and Brazil to assist home owners and small businesses in monitoring photovoltaic (PV) module performance and enforcing warranty. It will work in collaboration with small PV system owners, consumer protection agencies. Brazil is endowed with excellent solar irradiance making it attractive for installation of PV systems. Participating owners of small PV systems would instruct inverter manufacturers to copy the daily e-mails to PVRG and as necessary, will authorize the PVRG to carry out review of PV systems. The presentation will consist of overall activities of PVRG in USA and Brazil.

  4. Adolescents' Views on Active and Non-Active Videogames: A Focus Group Study.

    Science.gov (United States)

    Simons, Monique; de Vet, Emely; Hoornstra, Sjoukje; Brug, Johannes; Seidell, Jaap; Chinapaw, Mai

    2012-06-01

    Active games require whole-body movement and may be an innovative tool to substitute sedentary pastime with more active time and may therefore contribute to adolescents' health. To inform strategies aimed at reducing sedentary behavior by replacing non-active with active gaming, perceptions and context of active and non-active gaming are explored. Six focus groups were conducted with adolescents 12-16 years old representing a range of education levels. A semistructured question route was used containing questions about perceptions and the context of gaming. The adolescents had positive attitudes toward active gaming, especially the social interactive aspect, which was greatly appreciated. A substantial number of adolescents enjoyed non-active games more than active ones, mainly because of better game controls and more diversity in non-active games. Active games were primarily played when there was a social gathering. Few game-related rules and restrictions at home were reported. Given the positive attitudes of adolescents and the limited restrictions for gaming at home, active videogames may potentially be used in a home setting as a tool to reduce sedentary behavior. However, to make active games as appealing as non-active games, attention should be paid to the quality, diversity, and sustainability of active games, as these aspects are currently inferior to those of traditional non-active games.

  5. Ideologically motivated activism: How activist groups influence corporate social change activities

    NARCIS (Netherlands)

    den Hond, F.; de Bakker, F.G.A.; Hickman, G. R.

    2010-01-01

    Using insights from the social movement literature and institutional change theory, we explore how activism influences corporate social change activities. As the responsibility for addressing a variety of social issues is transferred from the state to the private sector, activist groups increasingly

  6. Mezclas de Alfalfa y Gramíneas en la Serie Sabana de Bogotá Tipo Franco Arcilloso.

    Directory of Open Access Journals (Sweden)

    Chaverra Gil. Hernán

    1960-06-01

    Full Text Available En el Centro Nacional de Investigaciones Agrícolas, Tibaitatá, y en la serie de suelos Sabana de Bogotá, tipo frnaco arcilloso, se llevaron a cabo dos experimentos con mezclas de alfalfa y gramíneas. En el primer ensayo, se sembraron simultáneamente con la alfalfa, ryegrass inglés, rygrass anual y orchoso. Los métodos de siembra utilizados fueron: a alfalfa y gramíneas sembradas al voleo, b alfalfa y gramíneas en el mismo surco, c alfalfa y gramíneas en surcos alternos, d alfalfa en surcos y gramíneas al voleo y e alfalfa en surcos y trébol blanco al voleo. En el segundo experimento se sembró la alfalfa en surcos separados 25 cm. Después de establecida la alfalfa e inmediatamente después del 4° corte se sembraron al voleo las siguientes gramíneas: ryegrass inglés, rygrass anual, orchoro, festuca media, pasto cinta y pasto rescate. Las finalidades del estudio fueron las de valorar el comportamiento de las gramíneas en mezcla con la alfalfa, mediante la determinación progresiva de la composición botánica y el rendimiento de forraje seco de las mezclas. La siembra simultánea de ryegrass inglés y ryegrass anual con la alfalfa dio como resultado una mala población de la leguminosa, especialmente en los dos primeros cortes. La competencia ejercida por estas dos gramíneas a la alfalfa, se redujo casi completamente, cuando se sembraron en surcos alternos o en la alfalfa establecida. Sea cual fuere el pasto sembrado, la siembra de gramíneas en alfalfa establecida, redujo la competencia entre los pastos asociados. En este ensayo el factor más importante en el establecimiento de las gramíneas, fue el agua disponible en el suelo. Bajo las condiciones del primer experimento el orchoro fue la gramínea que mejor creció en asocio de la alfalfa en todos los métodos de siembra estudiado. La producción promedia de la mezcla varió entre 2600 y 3145 Kg/hect. De forreje seco por corte y la proporción de orchoro entre

  7. Physical activity assessment and counseling in Quebec family medicine groups.

    Science.gov (United States)

    Baillot, Aurélie; Baillargeon, Jean-Patrice; Paré, Alex; Poder, Thomas G; Brown, Christine; Langlois, Marie-France

    2018-05-01

    To determine how often primary health care providers (PHCPs) in family medicine groups (FMGs) assess physical activity (PA) levels, provide PA counseling (PAC), and refer patients to exercise professionals; to describe patients' PA levels, physical fitness, and satisfaction regarding their PA management in FMGs; to describe available PA materials in FMGs and PHCPs' PAC self-efficacy and PA knowledge; and to identify characteristics of patients and PHCPs that determine the assessment of PA and PAC provided by PHCPs. Cross-sectional study using questionnaires and a medical chart audit. Ten FMGs within the Integrated University Health Network of the Centre hospitalier universitaire de Sherbrooke in Quebec. Forty FPs, 24 nurses, and 439 patients. Assessment of PA level and PAC provided by PHCPs. Overall, 51.9% of the patients had had their PA level assessed during the past 18 months, but only 21.6% received PAC from at least 1 of the PHCPs. Similar percentages were found among the inactive (n = 244) and more active (n = 195) patients. The median PAC self-efficacy score of PHCPs was 70.2% (interquartile range 52.0% to 84.7%) and the median PA knowledge score was 45.8% (interquartile range 41.7% to 54.2%), with no significant differences between nurses and FPs. In multivariate analysis, 34% of the variance in PAC provided was explained by assessment of PA level, overweight or obese status, type 2 diabetes or prediabetes, less FP experience, lower patient annual family income, more nurse encounters, and a higher patient physical component summary of quality of life. The rates of assessment of PA and provision of PAC in Quebec FMGs were low, even though most of the patients were inactive. Initiatives to support PHCPs and more resources to assess PA levels and provide PAC should be implemented. Copyright© the College of Family Physicians of Canada.

  8. Activities of the EMRAS Tritium/C14 Working Group

    International Nuclear Information System (INIS)

    Davis, P.A.; Balonov, M.; Venter, A.

    2005-01-01

    A new model evaluation program, Environmental Modeling for Radiation Safety (EMRAS), was initiated by the International Atomic Energy Agency in September 2003. EMRAS includes a working group (WG) on modeling tritium and C-14 transfer through the environment to biota and man. The main objective of this WG is to develop and test models of the uptake, formation and translocation of organically bound tritium (OBT) in food crops, animals and aquatic systems. To the extent possible, the WG is carrying out its work by comparing model predictions with experimental data to identify the modeling approaches and assumptions that lead to the best agreement between predictions and observations. Results for scenarios involving a chronically contaminated aquatic ecosystem and short-term exposure of soybeans are presently being analyzed. In addition, calculations for scenarios involving chronically contaminated terrestrial food chains and hypothetical short-term releases are currently underway, and a pinetree scenario is being developed. The preparation of datasets on tritium dynamics in large animals and fish is being encouraged, since these are the areas of greatest uncertainty in OBT modeling. These activities will be discussed in this paper

  9. Update on Activities of CEOS Disaster Management Support Group

    Science.gov (United States)

    Wood, H. M.; Lauritson, L.

    The Committee on Earth Observation Satellites (CEOS) Disaster Management Support Group (DMSG) has supported natural and technological disaster management on a worldwide basis by fostering improved utilization of existing and planned Earth Observation (EO) satellite data. The DMSG has focused on developing and refining recommendations for the application of satellite data to selected hazard areas--drought, earthquake, fire, flood, ice, landslide, oil spill, and volcanic hazards. Particular emphasis was placed on working closely with space agencies, international and regional organizations, and commercial organizations on the implementation of these recommendations. The DMSG is in its last year with its primary focus on documenting its work and migrating on going activities to other fora. With over 300 participants from more than 140 organizations, the DMSG has found strong support among CEOS space agencies and the Integrated Global Observing Strategy (IGOS), as well as an enthusiastic reception from numerous international, regional, and national emergency managers, and distinct interest from the commercial sector. In addition, the group has worked to give full support to the work of the United Nations Committee on the Peaceful Uses of Outer Space (COPUOS) in pursuit of decisions taken at UNISPACE III and the United Nations International Strategy on Disaster Reduction (ISDR). In conjunction with the IGOS, several of the DMSG hazards teams (earthquake, landslide, and solid Earth dimensions of volcanoes) are joining in the effort to develop an IGOS Geohazards theme team. Cooperation efforts with organizations such as IGOS, COPUOS, and ISDR will hopefully lead to the pick up of much of the on going DMSG activities. Since the inception of this ad hoc working group and its predecessor project, the DMSG has developed and refined recommendations for the application of satellite data by bringing together experts from eight hazard areas to identify user needs, as well as

  10. Efectividad de cepas rizobianas nativas de sabana en Vigna unguiculata (L. Walp. cv. C4A-3

    Directory of Open Access Journals (Sweden)

    Juliana Mayz

    2010-07-01

    Full Text Available Título en inglés: Effectiveness of savannah native rhizobial strains in Vigna unguiculata (L. Walp. cv. C4A-3 Resumen Se estima que la población mundial se incrementará y demandará mayor cantidad de alimentos y uso de fertilizantes nitrogenados. En Venezuela, el frijol es altamente consumido y se cultiva en las sabanas orientales, cuyas características edáficas pueden afectar negativamente la población rizobiana. Estos planteamientos refuerzan la importancia de la evaluación de la flora rizobiana nativa, y enfatizan la necesidad de aumentar la explotación de la fijación biológica de nitrógeno. En este contexto, se evaluaron 6 cepas rizobianas en el cultivar C4A-3, aisladas, de frijol cv. Tejero Criollo y previamente catalogadas como efectivas (JV91, JV94 y JV101 e inefectivas (JV99, JV103, y JV104 en el cultivar TC9-6. El experimento se llevó a cabo en umbráculo por 45 días, donde además se incluyeron dos tratamientos control no inoculados. La suspensión de las cepas individualmente cultivadas se usó para inoculación. De acuerdo con la tipología de la nodulación (número de nódulos, peso total y por nódulo, tamaño y color, los valores de los parámetros de crecimiento (peso seco, altura y número de hojas del vástago y los estimados de la concentración de nitrógeno y nitrógeno total, las cepas JV91, JV99 y JV101, fueron las más efectivas en la fijación de nitrógeno. El nitrógeno total y la concentración de nitrógeno tuvieron una correlación significativa con peso seco, altura y número de hojas del vástago. Los resultados muestran la existencia de cepas efectivas en los suelos de sabana para este cultivar, y enfatizan la importancia de evaluar las cepas indígenas, antes de proceder a la inoculación con foráneas. Palabras clave: Rhizobium; frijol; fijación de nitrógeno; Venezuela. Abstract It is estimated that world-wide population will increase and demand higher amount of food and use of nitrogen

  11. Nordic working group on CCF studies. Parameter estimation within the activities of the Nordic CCF Group

    International Nuclear Information System (INIS)

    Johansson, G.

    2002-01-01

    depending on component type. Plant And Regulator Survey: The survey shall provide a background to this project based on the needs and experience form the plant owners and the regulators. The survey shall try to reach a wide spectrum of personnel from regulation, operation, design engineering, safety committees and risk assessment groups. Important elements of the survey are to carry out a dialog with the organisations to engage them in the issues related to this programme and to marked the outcome and use of the analysis. The quantitative work area cover activities related to the quantitative assessment of the data. The procedure for common cause failure data analysis is intended to provide guidance on event analysis, the derivation of event statistics, and the estimation of model parameters. CCF events do often contribute significantly to the PSA results and it is necessary to have the best estimates possible. Qualitative work areas: Provide insights into the plant design and operation; allow credit for existing plant defenses in PSA work; support inspection and operation in assessing plant status with regard to CCF defenses. Qualitative classification. (author)

  12. Group sex offending by juveniles: coercive sex as a group activity

    NARCIS (Netherlands)

    Bijleveld, C.C.J.H.; Weerman, F.; Looije, D.; Hendriks, J.

    2007-01-01

    We study sex offences carried out by groups of juveniles, focusing on offender characteristics and the interaction patterns within offender groups and between offenders and victims. Using reconstructions of offences from court files as well as information retrieved from personality screenings, we

  13. Space Weather Activities of IONOLAB Group: IONOLAB-TEC

    Science.gov (United States)

    Arikan, F.; Sezen, U.; Arikan, O.; Ugurlu, O.; Nayir, H.

    2009-04-01

    Space Weather (SW) is the concept of changing environmental conditions in outer space and affect Earth and its technological systems. SW is a consequence of the solar activities and the coupling of solar energy on Earth's atmosphere due to the Earth's magnetic field. The monitoring and prediction of SW has utmost importance for HF communication, Satellite communication, navigation and guidance systems, Low Earth Orbit (LEO) satellite systems, Space Craft exit and entry into the atmosphere. Ionosphere is the plasma layer of the atmosphere that is ionized by solar radiation and it is a key player of SW. Ionosphere is a temporally and spatially varying, dispersive, anisotropic and inhomogeneous medium that is characterized primarily by its electron density distribution. IONOLAB is a group of researchers of various disciplines, getting together to handle challenges of the Earth's ionosphere. The team has researchers from Hacettepe University and Bilkent University, Department of Electrical and Electronics Engineering and General Command of Mapping of Turkish Army. One of the most important contributions of IONOLAB group is the automated web-based computation service for Total Electron Content (TEC). TEC corresponds to the line integral of electron density distribution on a given path. TEC can also be expressed as the amount of free electrons within 1 m2 cross-sectional area of the cylinder on the ray path. Global Position System (GPS) provides a cost-effective medium for monitoring of ionosphere using the signals recorded by stationary GPS receivers in estimating TEC. IONOLAB group has developed IONOLAB-TEC for reliable and robust estimates for all latitudes and both calm and disturbed days by using RINEX, IONEX and satellite ephemeris data provided from the IGS centers. IONOLAB-TEC consists of a regularized signal estimation algorithm which combines signals from all GPS satellites for a given instant and a given receiver, for a desired time period or for 24 hours

  14. BIOINDICACIÓN DE LA CALIDAD DEL AGUA CON MACROINVERTEBRADOS ACUÁTICOS EN LA SABANA DE BOGOTÁ, UTILIZANDO REDES NEURONALES ARTIFICIALES

    Directory of Open Access Journals (Sweden)

    GUTIÉRREZ JUAN DAVID

    2004-06-01

    Full Text Available Se presenta una implementación de la metodología de redes neuronales (RN comoherramienta para la estimación de la calidad del agua en la cuenca alta y media del ríoBogotá, Colombia. Los datos usados provienen de 55 sitios correspondientes aonce cuencas de la sabana de Bogotá. Los resultados obtenidos con la aplicaciónde la RN fueron comparados con los valores del índice fisicoquímico Cfq y del índicede bioindicación ASPT (Average Score Per Taxon, para comprobar el grado deconfiabilidad de la metodología.Palabras clave. Redes neuronales,

  15. MODELO CONCEPTUAL DEL PAPEL ECOLÓGICO DE LA HORMIGA ARRIERA (Atta laevigata EN LOS ECOSISTEMAS DE SABANA ESTACIONAL (VICHADA, COLOMBIA

    Directory of Open Access Journals (Sweden)

    CORTÉS-PÉREZ FRANCISCO

    2003-12-01

    Full Text Available Se presentan algunos aspectos del ciclo de vida de la hormiga arriera Atta laevigata,en especial el vuelo nupcial, con notas ecológicas de interés, el perfil modal desuelos afectados por la actividad de las arrieras y se analiza su contenido denutrientes. Se detalla el funcionamiento y la estructura de las colonias de arrierascon especial énfasis en el transporte y la acumulación de nutrientes y semillas en lossitios de establecimiento de la colonia; se explica el establecimiento de las matas demonte a partir de estos sitios ricos en nutrientes y semillas. Con base en estosaspectos se plantea un modelo funcional del papel que cumplen las colonias dearrieras en los ecosistemas de sabana estacional.

  16. Características bio-ecológicas en poblaciones de lombrices (Oligochaeta: Glossoscolecidae de una sabana natural y una protegida en los llanos centrales de Venezuela

    Directory of Open Access Journals (Sweden)

    Luis Hernández

    2012-09-01

    Full Text Available Las lombrices de tierra tienen un papel importante en el ciclado de nutrientes y el mantenimiento de la fertilidad de los suelos. En este estudio se empleo el método de extracción manual para determinar la densidad y la biomasa de las lombrices de tierra en diferentes profundidades y en diferentes estaciones, seleccionando al azar cinco monolitos de 25cm2x30cm, ubicados en un área de 90x90m en una Sabana Protegida (SP y una Sabana Natural Intervenida (SNI. Adicionalmente, se estimó la densidad de los capullos, se analizaron las clases de etapas de desarrollo y se clasificaron los individuos en categorías ecológicas. Se estimó la humedad del suelo, la capacidad de campo, la temperatura, la densidad aparente y la textura del suelo. La SP presentó mejores condiciones físicas en el suelo que la SNI, mientras que la actividad de las lombrices de tierra estuvo limitada a los meses de lluvia y se observó un patrón de migración estacional en el perfil del suelo. En la SNI sólo se observó presencia de individuos en agosto y no se encontró diferencia significativa en sus biomasas con la SP. Los sistemas estuvieron dominados por individuos jóvenes con una categoría ecológica de tipo endo-anécica pertenecientes a la familia

  17. Group Problem Solving as a Zone of Proximal Development activity

    Science.gov (United States)

    Brewe, Eric

    2006-12-01

    Vygotsky described learning as a process, intertwined with development, which is strongly influenced by social interactions with others that are at differing developmental stages.i These interactions create a Zone of Proximal Development for each member of the interaction. Vygotsky’s notion of social constructivism is not only a theory of learning, but also of development. While teaching introductory physics in an interactive format, I have found manifestations of Vygotsky’s theory in my classroom. The source of evidence is a paired problem solution. A standard mechanics problem was solved by students in two classes as a homework assignment. Students handed in the homework and then solved the same problem in small groups. The solutions to both the group and individual problem were assessed by multiple reviewers. In many cases the group score was the same as the highest individual score in the group, but in some cases, the group score was higher than any individual score. For this poster, I will analyze the individual and group scores and focus on three groups solutions and video that provide evidence of learning through membership in a Zone of Proximal Development. Endnotes i L. Vygotsky -Mind and society: The development of higher mental processes. Cambridge, MA: Harvard University Press. (1978).

  18. Non-routine activities in RP Group in 1995

    International Nuclear Information System (INIS)

    Hoefert, M.; Stevenson, G.R.

    1996-01-01

    The activities not directly concerned with the daily routine, but nevertheless essential to ensure a steady progress in radiation protection at CERN, concern mostly tests and intercomparisons of existing methods (quality control), development of new ideas, methods, and instruments. New projects, another non-routine activity, require in most cases profound studies to prove their feasibility with respect to radiation protection requirements. All these activities are documented in Divisional Reports, Internal Reports and Technical Memoranda, and are listed

  19. ESTABLECIMIENTO DE VALORES DE BIOINDICACIÓN PARA MACROINVERTEBRADOS ACUÁTICOS DE LA SABANA DE BOGOTÁ

    Directory of Open Access Journals (Sweden)

    RISS WOLFGANG

    2002-06-01

    Full Text Available Se presenta una metodología que permite el establecimiento de un sistema de indicaciónbiológica para la contaminación orgánica de aguas corrientes sobre la base demacroinvertebrados acuáticos de la Sabana de Bogotá, Colombia - Norte de losAndes. Se asignan valores numéricos de indicación para 57 familias del macrobentosobtenidos con el objeto de cumplir los requerimientos básicos del sistema BMWP,establecido para la bioindicación de contaminación orgánica en Inglaterra y - conciertas modificaciones - en España. El principal objeto de este estudio es expresar elefecto de la contaminación orgánica como un factor ambiental específico más queafecta la distribución de las familias del macrobentos en la región de estudio. Paraeste propósito, el empleo de un promedio ponderado, el cual permite obtener valoresde indicación numérica aplicables y fácilmente reproducibles, resultó ser tan o máseficiente que las técnicas multivariadas de regresión. El estudio se llevó a cabo deacuerdo con el siguiente diseño: 1. Se tomaron muestras en 28 sitios localizados en8 corrientes de agua en alturas de 2550 a 3300 msnm. Se tomaron datos biológicos ydatos fisicoquímicos por un periodo de dos años incluyendo periodos de diferentesniveles de caudal. 2. El macrobentos fue muestreado en diferentes coriotopos(microhábitats. 3. Se ordenaron 18 variables fisicoquímicas mediante un análisis defactores. Nueve de ellas fueron determinadas como componentes del primer factorambiental indicativo de contaminación orgánica. 4. Se calcularon los valores (scoresde calidad fisicoquímica (Cfq usando las nueve variables fisicoquímicas seleccionadasanteriormente. 5. Los valores de indicación (Tm que deben corresponder a latolerancia mínima (Tm a la contaminación orgánica fueron determinados para cadafamilia del macrobentos a través del quinto percentil de la curva de distribuciónnormal ajustada de las abundancias de las familias sobre las diez

  20. Engineering and service activities in the Cogema group

    International Nuclear Information System (INIS)

    1998-03-01

    This short document presents the engineering and service daughter companies of the Cogema group: SGN (nuclear engineering, fuel cycle, wastes and spent fuels management, decontamination and dismantling); Euriware group (advice, expertise and information systems in nuclear, pharmacy, petroleum, automotive and steel making industries); Game group (industrial maintenance in nuclear, chemistry, petroleum, automotive and steel making industries); Eurisys Mesures (nuclear measurements, instrumentation, radiation protection and nuclear imaging); SICN (mechanics); STMI and Socodei (nuclear cleansing and management of low level radioactive wastes); Krebs/Speichim (chemical engineering, divisions of SGN and Technip). (J.S.)

  1. Scaffolding of Small Groups' Metacognitive Activities with an Avatar

    Science.gov (United States)

    Molenaar, Inge; Chiu, Ming Ming; Sleegers, Peter; van Boxtel, Carla

    2011-01-01

    Metacognitive scaffolding in a computer-supported learning environment can influence students' metacognitive activities, metacognitive knowledge and domain knowledge. In this study we analyze how metacognitive activities mediate the relationships between different avatar scaffolds on students' learning. Multivariate, multilevel analysis of the…

  2. Neutronic activation analysis of antique ceramics. Groups and differenciation

    International Nuclear Information System (INIS)

    Widemann, F.

    1975-01-01

    Different techniques for clay analysis in view of studying the origin of ceramics are exposed. The element abundance is measured by X-ray fluorescence analysis or by neutron activation analysis. Comparative tables of the results are established [fr

  3. Antimalarial activity of abietane ferruginol analogues possessing a phthalimide group.

    Science.gov (United States)

    González, Miguel A; Clark, Julie; Connelly, Michele; Rivas, Fatima

    2014-11-15

    The abietane-type diterpenoid (+)-ferruginol, a bioactive compound isolated from New Zealand's Miro tree (Podocarpus ferruginea), displays relevant pharmacological properties, including antimicrobial, cardioprotective, anti-oxidative, anti-plasmodial, leishmanicidal, anti-ulcerogenic, anti-inflammatory and anticancer. Herein, we demonstrate that ferruginol (1) and some phthalimide containing analogues 2-12 have potential antimalarial activity. The compounds were evaluated against malaria strains 3D7 and K1, and cytotoxicity was measured against a mammalian cell line panel. A promising lead, compound 3, showed potent activity with an EC50 = 86 nM (3D7 strain), 201 nM (K1 strain) and low cytotoxicity in mammalian cells (SI>290). Some structure-activity relationships have been identified for the antimalarial activity in these abietane analogues. Copyright © 2014 Elsevier Ltd. All rights reserved.

  4. Active facilitation of focus groups: exploring the implementation of ...

    African Journals Online (AJOL)

    The focus group research reported in this article forms part of a broader inter- ..... “scientific research in education” should “refrain from writing [and acting] as if our ..... http://www.qualitative-research.net/index.php/fqs/article/view/338/737.

  5. Active facilitation of focus groups: exploring the implementation of ...

    African Journals Online (AJOL)

    In this article, we explain how we took an “active” approach to focus group discussions with teachers in three South African schools. The topic of discussion was their views on the implementation of inclusive education. We shall also show how we sought feedback from the participants on their experiences of these ...

  6. MobiGroup: Enabling Lifecycle Support to Social Activity Organization and Suggestion with Mobile Crowd Sensing

    OpenAIRE

    Guo, Bin; Yu, Zhiwen; Chen, Liming; Zhou, Xingshe; Ma, Xiaojuan

    2015-01-01

    The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link. This paper presents a group-aware mobile crowd sensing system called MobiGroup, which supports group activity organization in real-world settings. Acknowledging the complexity and diversity of group activities, this paper introduces a formal concept model to characterize group activities and classifies them into four organizational stages. We t...

  7. Novel, high-activity hydroprocessing catalysts: Iron group phosphides

    Science.gov (United States)

    Wang, Xianqin

    A series of iron, cobalt and nickel transition metal phosphides was synthesized by means of temperature-programmed reduction (TPR) of the corresponding phosphates. The same materials, Fe2P, CoP and NO, were also prepared on a silica (SiO2) support. The phase purity of these catalysts was established by x-ray diffraction (XRD), and the surface properties were determined by N2 BET specific surface area (Sg) measurements and CO chemisorption. The activities of the silica-supported catalysts were tested in a three-phase trickle bed reactor for the simultaneous hydrodenitrogenation (HDN) of quinoline and hydrodesulfurization (HDS) of dibenzothiophene using a model liquid feed at realistic conditions (30 atm, 370°C). The reactivity studies showed that the nickel phosphide (Ni2P/SiO2) was the most active of the catalysts. Compared with a commercial Ni-Mo-S/gamma-Al 2O3 catalyst at the same conditions, Ni2P/silica had a substantially higher HDS activity (100% vs. 76%) and HDN activity (82% vs. 38%). Because of their good hydrotreating activity, an extensive study of the preparation of silica supported nickel phosphides, Ni2P/SiO 2, was carried out. The parameters investigated were the phosphorus content and the weight loading of the active phase. The most active composition was found to have a starting synthesis Ni/P ratio close to 1/2, and the best loading of this sample on silica was observed to be 18 wt.%. Extended x-ray absorption fine structure (EXAFS) and x-ray absorption near edge spectroscopy (XANES) measurements were employed to determine the structures of the supported samples. The main phase before and after reaction was found to be Ni2P, but some sulfur was found to be retained after reaction. A comprehensive scrutiny of the HDN reaction mechanism was also made over the Ni2P/SiO2 sample (Ni/P = 1/2) by comparing the HDN activity of a series of piperidine derivatives of different structure. It was found that piperidine adsorption involved an alpha-H activation

  8. Parents' Networking Strategies: Participation of Formal and Informal Parent Groups in School Activities and Decisions

    Science.gov (United States)

    Wanat, Carolyn L.

    2010-01-01

    This case study examined parent groups' involvement in school activities and their participation in decision making. Research questions included the following: (1) What is the nature of parent groups in schools? (2) What activities and issues gain parent groups' attention and participation? (3) How do parent groups communicate concerns about…

  9. Activities of the ICRP task group on dose calculations (DOCAL)

    International Nuclear Information System (INIS)

    Bertelli, Luiz

    1997-01-01

    Full text. The International Commission of Radiological Protection has been doing many efforts to improve dose calculations due to intake of radionuclides by workers and members of the public. More specifically, the biokinetic models have become more and more physiologically based and developed for age-groups ranging from the embryo to the adult. The dosimetric aspects have also been very carefully revised and a new series of phantoms encompassing all developing stages of embryo and fetus were also envisaged. In order to assure the quality of the calculations, dose coefficients have been derived by two different laboratories and the results and methods have been frequently compared and discussed. A CD-ROM has been prepared allowing the user to obtain dose coefficients for the several age-groups for ingestion and inhalation of all important radionuclides. Inhalation dose coefficients will be available for several AMADs. For the particular case of embryo and fetus, doses will be calculated when the intake occurred before and during gestation for single and chronic patterns of intake

  10. Activation Analysis. Proceedings of an Informal Study Group Meeting

    International Nuclear Information System (INIS)

    1971-01-01

    As part of its programme to promote the exchange of information relating to nuclear science and technology, the International Atomic Energy Agency convened in Bangkok, Thailand, from 6-8 July 1970, an informal meeting to discuss the topic of Activation Analysis. The meeting was attended by participants drawn from the following countries: Australia, Burma, Ceylon, Republic of China, India, Indonesia, Prance, Japan, Republic of Korea, New Zealand, Philippines, Singapore, Thailand, United States of America and Vietnam. The proceedings consist of the contributions presented at the meeting with minor editorial changes

  11. Activation Analysis. Proceedings of an Informal Study Group Meeting

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1971-07-01

    As part of its programme to promote the exchange of information relating to nuclear science and technology, the International Atomic Energy Agency convened in Bangkok, Thailand, from 6-8 July 1970, an informal meeting to discuss the topic of Activation Analysis. The meeting was attended by participants drawn from the following countries: Australia, Burma, Ceylon, Republic of China, India, Indonesia, Prance, Japan, Republic of Korea, New Zealand, Philippines, Singapore, Thailand, United States of America and Vietnam. The proceedings consist of the contributions presented at the meeting with minor editorial changes.

  12. Contralateral delay activity tracks the influence of Gestalt grouping principles on active visual working memory representations.

    Science.gov (United States)

    Peterson, Dwight J; Gözenman, Filiz; Arciniega, Hector; Berryhill, Marian E

    2015-10-01

    Recent studies have demonstrated that factors influencing perception, such as Gestalt grouping cues, can influence the storage of information in visual working memory (VWM). In some cases, stationary cues, such as stimulus similarity, lead to superior VWM performance. However, the neural correlates underlying these benefits to VWM performance remain unclear. One neural index, the contralateral delay activity (CDA), is an event-related potential that shows increased amplitude according to the number of items held in VWM and asymptotes at an individual's VWM capacity limit. Here, we applied the CDA to determine whether previously reported behavioral benefits supplied by similarity, proximity, and uniform connectedness were reflected as a neural savings such that the CDA amplitude was reduced when these cues were present. We implemented VWM change-detection tasks with arrays including similarity and proximity (Experiment 1); uniform connectedness (Experiments 2a and 2b); and similarity/proximity and uniform connectedness (Experiment 3). The results indicated that when there was a behavioral benefit to VWM, this was echoed by a reduction in CDA amplitude, which suggests more efficient processing. However, not all perceptual grouping cues provided a VWM benefit in the same measure (e.g., accuracy) or of the same magnitude. We also found unexpected interactions between cues. We observed a mixed bag of effects, suggesting that these powerful perceptual grouping benefits are not as predictable in VWM. The current findings indicate that when grouping cues produce behavioral benefits, there is a parallel reduction in the neural resources required to maintain grouped items within VWM.

  13. Structure of ganglioside with CAD blood group antigen activity

    International Nuclear Information System (INIS)

    Gillard, B.K.; Blanchard, D.; Cartron, J.P.; van Kuik, G.A.; Vliegenthart, J.F.G.; Marcus, D.M.

    1986-01-01

    The novel erythrocyte ganglioside which carries the blood group Cad determinant has been isolated, and its structure has been determined. The ganglioside contained Glu:Gal:GalNAc:GlcNAc in a molar ratio of 1.00:1.94:0.93:0.95. The ganglioside binds Helix pomatia lectin and its chromatographic mobility is similar to G/sub D3/. After treatment with β-hexosaminidase (human placenta HexA) the product migrated with sialosylparagloboside (SPG), no longer binds Helix lectin, and binds a human anti-SPG antibody. Treatment of this material with neuraminidase (V. cholera) yielded a product with the mobility of paragloboside that bound monoclonal antibody 1B2. NMR analysis revealed that the terminal GalNAc is linked β1-4 to Gal, and confirms the structure proposed previously: GalNAcβ1-4(NeuAcα2-3)Galβ1-4GlcNAcβ1-3Galβ1-4Glc-Cer. This structure is consistent with the previous demonstration that a compound with the same chromatographic mobility as the Cad ganglioside could be synthesized by enzymatic transfer of GalNAc to sialosylparagloboside

  14. Cambios en las comunidades de peces de los arrecifes coralinos del Archipiélago Sabana-Camagüey, Cuba

    Directory of Open Access Journals (Sweden)

    Rodolfo Claro

    2007-06-01

    Full Text Available Al comparar la estructura de las comunidades de peces en los arrecifes del Archipiélago Sabana-Camagüey entre 1988-89 y el año 2000, mediante iguales censos visuales (ocho transeptos lineales de 2x50 m en cada estación, se observó una notable disminución de la riqueza de especies y una reducción en dos tercios de la densidad y biomasa de peces. Tal disminución de las poblaciones de peces parece estar relacionada con la alarmante disminución de la cobertura de corales escleractínios y una gran proliferación de algas, las cuales actualmente cubren 7080% del sustrato duro, impidiendo la recuperación de los corales y otros organismos bénticos. Grandes mortalidades de corales ocurrieron entre los dos periodos de estudio, lo cual parece ser consecuencia de las altas temperaturas provocadas por los eventos ENOS de 1995, 1997 y 1998. Estos fenómenos climáticos provocaron el blanqueamiento masivo de los corales y como consecuencia se produjo una gran proliferación de las algas. Asimismo en el período entre ambos muestreos ocurrió el enriquecimiento de nutrientes desde las lagunas interiores y la sobreexplotación de los recursos pesqueros. El conjunto de estos factores provocaron una marcada degradación del hábitat en los arrecifes. Tales cambios parecen haber afectado la disponibilidad de refugios y la alimentación para los peces, limitando el crecimiento individual y el tamaño de las poblaciones.Changes in fish communities of coral reefs at Sabana-Camagüey Archipelago, Cuba. A comparison of fish community structure in the Sabana-Camagüey Archipelago (1988-1989 and 2000 using visual census surveys (eight belt transects 2x50 m in each site suggests a notable decrease on species richness, and a two thirds reduction in fish density and biomass on coral reefs. This decrease in fish populations may be related to the alarming decrease of scleractinian coral cover, and an enormous proliferation of algae, which currently covers 70-80% of

  15. Evaluación de la estabilidad estructural y espacio poroso en un Oxisol de sabana de los Llanos Orientales de Colombia

    Directory of Open Access Journals (Sweden)

    Jesús Hernando Galvis Quintero

    2016-06-01

    Full Text Available En un suelo Typic Haplustox Isohipertérmico Caolinítico de Sabana de la altillanura Colombiana, estación experimental Sabanas (CORPOICA, se estableció un experimento en un diseño de parcelas divididas con cuatro repeticiones, con la interacción entre sistemas de producción Pasturas y rotación (maíz, soya y tres sistemas de labranza (cincel, vertedera y rastra, en unidades experimentales de (20m x 20m para estudiar su efecto sobre la estabilidad estructural y la continuidad del espacio poroso en el perfil del suelo. La estabilidad de agregados se evaluó por el método de Yoder. El análisis de imagen se realizó mediante petrografía siguiendo la metodología de microscopia electrónica del IGAC para sección delgada y las imágenes obtenidas se analizaron con Adobe Photoshop. La investigación permitió observar la discontinuidad del espacio poroso en los sistemas de producción y labranza. Los valores porcentuales de porosidad en el perfil del suelo, 0-10, 10-20, 20-30 y 30-40 cm, variaron de acuerdo a la metodología utilizada. Los valores porcentuales de la porosidad total, variaron entre 36% y 56%, mientras que la evaluación realizada a partir de petrografía y análisis de imagen deja ver una diferencia mayor (9% hasta 40% con valores que se ajustan más al comportamiento de la prueba de conductividad hidráulica saturada (CHS evaluada en los mismos perfiles. El suelo de la sabana, presento una porosidad total de 34.4%, 24.5%, 27.8, y 18.8% para cada una de las profundidades evaluadas por el método petrográfico; mientras que por formula presentó valores superiores (42.7%, 39.0%, 38.2%, y 36.5% y con poca variación entre sí. En general, fue posible observar que la evaluación de la porosidad por formula, no refleja la variación que se puede encontrar en el perfil del suelo, y menos dar cuenta del efecto de los implementos de labranza, además de no tener en cuenta la continuidad del espacio poroso. Entre los implementos

  16. Límites de consistencia y sus implicaciones agrícolas en un suelo ultisol de sabana del estado Monagas, Venezuela

    Directory of Open Access Journals (Sweden)

    Américo Hossne

    2004-01-01

    Full Text Available El conocimiento de las propiedades físicas de los suelos agrícolas y bióticos proporciona información para el manejo de equipos agrícolas, procesos de compactación y la labranza convencional y conservacionista. A medida que la humedad edáfica aumenta, genera diversos estados del suelo; e.g. una menor interacción entre partículas adyacentes y un comportamiento que se aproxima al del líquido. El inicio de la sensibilidad de compactación, parece ser el límite plástico del suelo bajo una bien definida energía de compactación. El objetivo general, de este estudio fue caracterizar sistemáticamente, con las implicaciones de ingeniería posibles, los suelos agrícolas de sabana del Estado Monagas de Venezuela. Los objetivos específicos consistieron en determinar: a- los límites de Atterberg; y b- el índice de plasticidad y friabilidad. Para ello se utilizó los procedimientos de laboratorio de Mecánica de Suelos: ASTM D427-61 para el límite de contracción, ASTM D424-59 para el límite plástico y ASTM 423-66 para el límite líquido, de un suelo de sabana en muestras aleatorias a las profundidades de 0-15, 15-30, 30-45 y 45-60 cm. Se utilizó el análisis de regresión para interpretar la proporción de la variancia entre parámetros. Los resultados indicaron valores de: límite de contracción de 4,22–5,20%, límite plástico de 12,92–14,04%, límite líquido de 16,94–19,43%, índice de plasticidad de 3,59–5,78% e índice de friabilidad de 8,63–8,84%. Se concluye que los valores concuerdan con la bibliografía y el rango de uso agrícola se encuentra entre 8% y 15% para el suelo en estudio.

  17. Active versus receptive group music therapy for major depressive disorder-A pilot study.

    Science.gov (United States)

    Atiwannapat, Penchaya; Thaipisuttikul, Papan; Poopityastaporn, Patchawan; Katekaew, Wanwisa

    2016-06-01

    To compare the effects of 1) active group music therapy and 2) receptive group music therapy to group counseling in treatment of major depressive disorder (MDD). On top of standard care, 14 MDD outpatients were randomly assigned to receive 1) active group music therapy (n=5), 2) receptive group music therapy (n=5), or 3) group counseling (n=4). There were 12 one-hour weekly group sessions in each arm. Participants were assessed at baseline, 1 month (after 4 sessions), 3 months (end of interventions), and 6 months. Primary outcomes were depressive scores measured by Montgomery-Åsberg Depression Rating Scale (MADRS) Thai version. Secondary outcomes were self-rated depression score and quality of life. At 1 month, 3 months, and 6 months, both therapy groups showed statistically non-significant reduction in MADRS Thai scores when compared with the control group (group counseling). The reduction was slightly greater in the active group than the receptive group. Although there were trend toward better outcomes on self-report depression and quality of life, the differences were not statistically significant. Group music therapy, either active or receptive, is an interesting adjunctive treatment option for outpatients with MDD. The receptive group may reach peak therapeutic effect faster, but the active group may have higher peak effect. Group music therapy deserves further comprehensive studies. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  18. When Two Heads Aren't Better than One: Conformity in a Group Activity

    Science.gov (United States)

    Fender, C. Melissa; Stickney, Lisa T.

    2017-01-01

    Group and team class decision-making activities often focus on demonstrating that "two heads are better than one." Typically, students solve a problem or complete an assessment individually, then in a group. Generally, the group does better and that is what the students learn. However, if that is all such an activity conveys, then a…

  19. Caracterización morfo agronómica de diecinueve cultivares de quinua (Chenopodium quinoa Willd. en la sabana de Bogotá Morpho-agronornic characterization of nineteen cultivars of quinoa (Chenopodium quinoa Willd. under Bogota's savanna conditions

    Directory of Open Access Journals (Sweden)

    Torres M. Juner

    2000-12-01

    Full Text Available Con el propósito de proveer información acerca de la variabilidad genética y la adaptación en la Sabana de Bogotá de la colección de quinua correspondiente a la Prueba Americana y Europea de Quinua, se estudiaron 19 cultivares mediante la evaluación 49 características morfológicas y agronómicas. El ensayo se realizó en el Centro Agropecuario «Marengo» de la Universidad Nacional de Colombia, ubicado en Mosquera (Cundinamarca. El análisis estadístico, mediante componentes principales para 35 de las variables evaluadas mostró que los ocho primeros componentes
    explican el 88.12% de la variación total. Estos componentes
    estuvieron asociados a 18 variables manifestando la diversidad entre los genotipos. Además, éstos se usaron para construir un dendograma que, calculado a partir de la distancia euclidiana, mostró la existencia de nueve grupos en los cuales se distinguieron claramente los materiales americanos de los europeos. Agronómicamente se destacaron los cultivares E-DK-4 y G-205- 95, procedentes de Dinamarca, principalmente por su precocidad, alto rendimiento en grano, alto rendimiento en biomasa y
    por su porte bajo.
    Nineteen cultivars of «American and European Quinoa Test» were used in this assay. Forty-nine morphological and agronomic characteristics were evaluated at Research Center «Marengo» of National University of Colombia, located at Mosquera (Cundinamarca. The main objective ofthis experiment was to study the genetic variability of quinoa cultivars from American and European countries. The statistical analysis was carried out with 35 out of 49 variables. The first eight components explained the 88,12% of total variation and were constituted by 18 variables. Using this information a dendogram was constructed. Nine groups
    were identified. Cultivars from American countries were separated from European's ones. The bcst cultivars were E-DK-4 and G-205-95 from Denmark. These presented high

  20. Understanding Mathematic Concept in Relation and Function Method through Active Learning Type Group to Group Distributed LKS

    Science.gov (United States)

    Kudri, F.; Rahmi, R.; Haryono, Y.

    2018-04-01

    This research is motivated by the lack of understanding of mathematical concepts students and teachers have not familiarize students discussed in groups. This researchaims to determine whether an understanding of mathematical concepts junior class VIII SMPN 2 in Ranah Batahan Kabupaten Pasaman Barat by applying active learning strategy group to group types with LKS better than conventional learning. The type of research is experimental the design of randomized trials on the subject. The population in the study were all students VIII SMPN 2 Ranah Batahan Kabupaten Pasaman Barat in year 2012/2013 which consists of our class room experiment to determine the grade and control class with do nerandomly, so that classes VIII1 elected as a experiment class and class VIII4 as a control class. The instruments used in the test empirically understanding mathematical concepts are shaped by the essay with rt=0,82 greater than rt=0,468 means reliable tests used. The data analysis technique used is the test with the help of MINITAB. Based on the results of the data analisis known that both of the sample are normal and homogenity in real rate α = 0,05, so the hypothesis of this research is received. So, it can be concluded students’ understanding mathematical concept applied the active Group to Group learning strategy with LKS is better than the students’ understanding mathematical concept with Conventional Learning.

  1. Determinación de géneros de endoparásitos que afectan a los equinos de las sabanas del Casanare

    Directory of Open Access Journals (Sweden)

    Germán Alonso Prada

    2009-12-01

    Full Text Available El estudio se desarrolló en las sabanas del departamento del Casanare, con el fin de identificar los géneros de endoparásitos gastrointestinales y pulmonares que afectan a los equinos de esta región del país, se muestrearon cuatro municipios del departamento: Aguazul, Paz de Ariporo, Maní y El Yopal, entre los meses de junio de 2006 y abril de 2007, recolectando en cada uno de los municipios diez muestras de materia fecal fresca, directamente de los potreros y completamente al azar. Las muestras fueron procesadas mediante las técnicas coprológicas de MacMaster, identificando huevos de tipo Strongylido spp., Strongyloide spp., Triodonthoforus spp., Habronema spp., y Oxyuros spp. Coprocultivo que determina la presencia de larvas L3 de pequeños strongylus (86,2%, Strongylus vulgaris (6,2%, Strongylus edentatus (3,6%, Strongylus equinus (2,8%, Strongyliodes westeri (1,1% y Trichostrongylus axei (0,20%. En el presente estudio mediante la técnica de Baermann no se encontraron larvas de Dyctiocaulus spp.

  2. LA CONTAMINACIÓN Y RIESGO SANITARIO EN ZONAS URBANAS DE LA SUBCUENCA DEL RÍO DE LA SABANA, CIUDAD DE ACAPULCO

    Directory of Open Access Journals (Sweden)

    America Libertad Rodriguez Herrera

    2013-06-01

    Full Text Available A menudo encontramos ciudades cuyo desarrollo está asociado a la ocupación de alguna cuenca hidrográfica, sobre la cual no rigen políticas y acciones públicas y o privadas, suficientes para detener los procesos de degradación ambiental y social provocados por las transformaciones del territorio. Los casos estudiados son dos comunidades de la periferia de la ciudad de Acapulco, influenciadas por la insuficiencia y carencia de infraestructura sanitaria y el entorno fluvial del río de La Sabana, que desarrollan sus vidas en un ambiente degradado y contaminado. Los datos aportados confirman que las enfermedades más recurrentes son las de las vías respiratorias y del tracto digestivo, reconocidas por la OMS como enfermedades asociadas a la contaminación, así también que toda acción destinada a la mitigación del riesgo sanitario, debe enfocarse en la atención de la situación de vulnerabilidad bajo una perspectiva holista.

  3. Características mineralógicas de la fracción inferior a dos micras de algunas arcillas de la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Julia Rubio de Cubides

    2009-09-01

    Full Text Available Se realizó el estudio mineralógico de tres muestras de arcilla correspondientes a dos depósitos de la sabana de Bogotá.Las técnicas de identificación empledas fueron difracción de rayox X, métodos térmicos (A.T.D., T.G y T.G.D., espectroscopia I.R y microscopía electrónica.El mineral predominante en la arcilla de los yacimientos es la caolinita, con cantidades variables de illita y pequeñas cantidades de esmectita. También está presente el cuarzo, pero no se detectaron feldespatos.Los índices de Hinckiey y los efectos endotérminos D.T. A. por abajo de 554°C ratificaron la baja cristalinidad de estas caolinitas.La morfología de las partículas se presenta pseudohexagonal en las microfotografías electrónicas.

  4. Estudio mineralóglco de la fracción arena de algunos materiales arcillosos de la sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Julia Rubio de Cubides

    2009-06-01

    Full Text Available Se realizó un estudio mineralógico de la fracción arena de tres muestras de materiales arcillosos situados en la Sabana de Bogotá. Esta fracción se caracterizó porque los minerales reslstentes-turmallna, circón y rutilo constituyeron más de la mitad de la fracción pesada de la muestra. Esta fracción también se caracterizó por una riqueza de minerales opacos naturales (ilmenlta, especialmente, y algo de magnetita, siendo los de alteración sobre todo leucoxenos. Dos de las muestras exhibieron un alto contenido de minerales metamórficos, en especial estaurolita. De los resultados granulométricos y mineralógicos de los materiales, se deduce que las muestras han sufrido alteraciones químicas fuertes (lavado, ya que únicamente permanecen los minearles resistentes (turmalina, circón, rutilo y cuarzo.

  5. Análisis Histórico de las Prácticas de Contabilidad Financiera del Ferrocarril de la Sabana, Colombia (1881-1917

    Directory of Open Access Journals (Sweden)

    Carlos Orlando Rico Bonilla

    2015-07-01

    Full Text Available En el documento se propone un análisis histórico para describir y explicar, a partir de las correspondientes fuentes primarias y secundarias, algunas de las prácticas de contabilidad financiera aplicadas en la empresa colombiana del Ferrocarril de Sabana durante el periodo 1881 – 1917.                                                                                 Se argumenta que lainformación financiera y los contadores de esta organización jugaron un papel valioso en la toma de decisiones económicas, especialmente, en temas de operación y liquidez. De igual forma que fue en compañías de esta industria, donde adquirió mayor relevancia la definición del tratamiento contable y la presentación de diferentes transacciones y eventos como la valoración y depreciación de activos fijos, el reconocimiento de las importaciones, la revelación de la cuenta de resultados, entre otros.

  6. The importance of group activities for quality of life of women in postmenopause

    Directory of Open Access Journals (Sweden)

    Renata Calazans Negrão

    2011-12-01

    Full Text Available Objective: To assess the quality of life of postmenopausal women who participate in different activities groups for elderly. Methods: We selected 59 women, divided as follows: hydrotherapy group (n = 15, physical activity and bingo group (n = 15, and a control group(n = 29. Data collection was done through a questionnaire evaluating the Quality of Life(WHOQOL-Bref, the Blatt and Kupperman Menopausal Index and Geriatric Depression Scale (GDS. The assessments were conducted in two stages with an interval of two monthsbetween each one. Results: There was an improvement in quality of life of women participants in activities groups with respect to the control group, and in all domains of quality of life questionnaire, the control group had lower values. Significant differences occurred in the environment domain, in comparing the hydrotherapy group and physical activity/bingo groups, of which the latter showed better responses. Conclusion: The activities groups were positive for improving quality of life of postmenopausal women, emphasizing the importance of encouraging the practice of not only physical activities, but also those that stimulate the social and psychological profile of these women.

  7. 75 FR 4904 - Railroad Safety Advisory Committee (RSAC); Working Group Activity Update

    Science.gov (United States)

    2010-01-29

    ... amend regulations protecting persons who work on, under, or between rolling equipment; and persons...-7257] Railroad Safety Advisory Committee (RSAC); Working Group Activity Update AGENCY: Federal Railroad... Committee (RSAC) Working Group Activities. SUMMARY: The FRA is updating its announcement of RSAC's Working...

  8. Active placebo control groups of pharmacological interventions were rarely used but merited serious consideration

    DEFF Research Database (Denmark)

    Jensen, Jakob Solgaard; Bielefeldt, Andreas Ørsted; Hróbjartsson, Asbjørn

    2017-01-01

    groups based on a random sample of 200 PubMed indexed placebo-controlled randomized drug trials published in October 2013. In a systematic review, we identified and characterized trials with active placebo control groups irrespective of publication time. In a third substudy, we reviewed publications...... with substantial methodological comments on active placebo groups (searches in PubMed, The Cochrane Library, Google Scholar, and HighWirePress). Results The prevalence of trials with active placebo groups published in 2013 was 1 out of 200 (95% confidence interval: 0–2), 0.5% (0–1%). We identified...

  9. The Exploration of the Relationship between Participation in Organized Activity and Cross-Group Friendships

    Directory of Open Access Journals (Sweden)

    Wonseok Suh

    2011-12-01

    Full Text Available Cross-group friendship is an important element in regard to reducing prejudice and increasing positive interracial interactions among young adults. In order to facilitate the formation of cross-group friendships, organized activity participation (e.g., community service and school-based extracurricular activities may provide an environment that supports positive cross-cultural interactions and contacts. The sample used for this study consisted of 601 college students. We tested whether participation in an organized activity contributes to the formation of cross-group friendships. The results of this study indicate that community service and school-based extracurricular activities significantly contribute to the formation of cross-group friendships among young adults. The findings also suggest that a variety of organized activities should be developed and implemented to facilitate cross-group friendships. We also discuss the practical implications of these findings.

  10. Using Electronic Communication Tools in Online Group Activities to Develop Collaborative Learning Skills

    Science.gov (United States)

    Khalil, Hanan; Ebner, Martin

    2017-01-01

    The purpose of this study was to investigate the effect of using synchronous and asynchronous communication tools in online group activities to develop collaborative learning skills. An experimental study was implemented on a sample of faculty of education students in Mansoura University. The sample was divided into two groups, a group studied…

  11. Activity Plans of Group Games for Social and Emotional Development of Kindergarten Children in Korea.

    Science.gov (United States)

    Choi, Kee Young

    Although classroom group games have been used to effectively teach mathematics in Korean kindergarten, ethnographic research has revealed some unexpected negative effects of such games on young children due to children's over-competitiveness and the teacher's unskilled group management. This paper proposes some activity plans for group games to…

  12. Evaluación formativa de la gestión ambiental del programa finca florverde en relación con el manejo de agua en la sabana de Bogotá

    OpenAIRE

    Copete Copete, Nidia Patricia

    2012-01-01

    El programa Finca Florverde es una estrategia integral de sostenibilidad de los floricultores agremiados en Asocolflores, uno de sus objetivos es facilitar criterios para administrar racionalmente las fuentes de agua y optimizar su consumo en los procesos de la actividad floricultora. El presente estudio evaluó el estado de un conjunto de parámetros de gestión ambiental del programa Finca Florverde en relación con el manejo de agua de las empresas de flores de la Sabana de Bogotá, a través de...

  13. THEORETICAL PRINCIPLES OF PSYCHOLOGICAL ANALYSIS OF STUDENTS’ GROUP PROJECT ACTIVITY WHILE LEARNING FOREIGN LANGUAGE

    Directory of Open Access Journals (Sweden)

    Viktoriia Kalamazh

    2016-06-01

    Full Text Available In this research the theoretical principles of psychological analysis of group project activity of students in the process of learning foreign language are defined on the basis of subject-activity, socio-psychological and cognitive paradigms. The approaches of different authors to the understanding of the concept of project and in particular group project activity are considered. The difficulties of the theoretical analysis of this specific notion are indicated due to the considerable variety of subjects, types and forms of the pedagogical activity, academic disciplines regarding which the researches are being carried out. Not disclosed aspects of organizing the group project activity of students are being determined, among them is a project group as an autonomous subject of joint activity for the realization students’ project activity while learning a foreign language; forming psychological readiness of teacher and student to use project method; the role of metacognitive aspect in the surrounding, where the project activity is being carried out; group functioning through the project work as a subject of group examination. It has been indicated that the analysis of project activity as an innovative technology must include its assessment as a condition of student’s developing as a subject of learning activity, his personal, socio-psychological, intellectual and professional self-perfection. Three levels of subjectivity in group project activity are being distinguished: teacher; each particular student; and student project group. Interaction between teacher and student is based on subject-subject relations. An organization of a project activity while learning a foreign language is considered as the one in which the student is moving in order to get the manager position and to master the basis of expert knowledge. Hereby, the main stress is on the group role as a subject of group examination, and also on metacognitive character of the

  14. Technip. Group dynamics and activities. Competitive environment and strategic perspectives. Release - February 2017

    International Nuclear Information System (INIS)

    2017-02-01

    After a synthesis which notably proposes a SWOT analysis of the Technip group, this report proposes a presentation of the Technip Group (general overview, presentation of activities per department, human resources, stock market data, and competitive environment). It gives an overview of the Technip group dynamics and of its activities through a presentation of an environment analysis (world oil demand and production, hydrocarbon prices), a presentation of the group activity (turnover, order takings, performance per activity pole, turnover per geographical area, operational income). It addresses important events and development axes: strategic axes, group restructuring, widening of service provision, R and D investments. Financial data are presented along with the main economic and financial indicators. Important statistical data are provided

  15. Development of active learning modules in pharmacology for small group teaching.

    Science.gov (United States)

    Tripathi, Raakhi K; Sarkate, Pankaj V; Jalgaonkar, Sharmila V; Rege, Nirmala N

    2015-01-01

    Current teaching in pharmacology in undergraduate medical curriculum in India is primarily drug centered and stresses imparting factual knowledge rather than on pharmacotherapeutic skills. These skills would be better developed through active learning by the students. Hence modules that will encourage active learning were developed and compared with traditional methods within the Seth GS Medical College, Mumbai. After Institutional Review Board approval, 90 second year undergraduate medical students who consented were randomized into six sub-groups, each with 15 students. Pre-test was administered. The three sub-groups were taught a topic using active learning modules (active learning groups), which included problems on case scenarios, critical appraisal of prescriptions and drug identification. The remaining three sub-groups were taught the same topic in a conventional tutorial mode (tutorial learning groups). There was crossover for the second topic. Performance was assessed using post-test. Questionnaires with Likert-scaled items were used to assess feedback on teaching technique, student interaction and group dynamics. The active and tutorial learning groups differed significantly in their post-test scores (11.3 ± 1.9 and 15.9 ± 2.7, respectively, P active learning session as interactive (vs. 37/90 students in tutorial group) and enhanced their understanding vs. 56/90 in tutorial group), aroused intellectual curiosity (47/90 students of active learning group vs. 30/90 in tutorial group) and provoked self-learning (41/90 active learning group vs. 14/90 in tutorial group). Sixty-four students in the active learning group felt that questioning each other helped in understanding the topic, which was the experience of 25/90 students in tutorial group. Nevertheless, students (55/90) preferred tutorial mode of learning to help them score better in their examinations. In this study, students preferred an active learning environment, though to pass examinations, they

  16. Total. Group dynamics and activities. Competitive environment and strategic perspectives. Release - July 2017

    International Nuclear Information System (INIS)

    2017-07-01

    After a synthesis which notably proposes a SWOT analysis of the Total group, this report proposes a presentation of the Total Group (general overview, presentation of activities, human resources, shareholder structure and stock market data, competitive environment). It gives an overview of the Total group dynamics and of its activities through a presentation of an environment analysis (world oil demand, refining-chemistry activity, hydrocarbon prices), a presentation of the group activity (turnover, turnover per segment, operational income and financial results of competitors). It comments important events and development axes: four strategic orientations, strengthening of the upstream pole, restructuring of refining and chemical activities, widening of the energy provision, consolidation of positions in the marketing and services sector. Financial data are presented along with the main economic and financial indicators. Important statistical data are provided

  17. Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method

    Directory of Open Access Journals (Sweden)

    Đukić Anđelka B.

    2014-01-01

    Full Text Available In order to improve sorption properties of activated carbon cloth that can be used for wastewater purification, mechanochemical activation was performed in both inert and air atmosphere. Boehm method was used to follow the changes in the number and types of surface groups induced by mechanical milling. The number of the base groups of 0,2493 mmol/g is significantly smaller than the total amount of acidic functional groups, 2,5093 mmol/g. Among the acidic groups present on the surface, the most represented are phenolic groups (2.3846 mmol/g , ie . > 95 % , the carboxylic groups are present far less (0.1173 mmol /g, ie. 4.5 %, while the presence of the lactone group on the surface of ACC is negligible (0.0074 mmol/g ie. under 0.3 %. Mechanochemical activation lead to an increase in the number of acidic and basic groups on the surface of the ACC. The milling in inert atmosphere has dominant effect with respect to the changes in the total number of basic functional groups (compared to milling in an air atmosphere: the number of basic groups of the ACC was 0.8153 mmol/g milled under argon, 0.7933 mmol/g in the air; the number of acidic groups is 2.9807 mmol/g for a sample milled under argon and 3.5313 mmol/g for one milled in the air.

  18. Impact of physical activity in group versus individual physical activity on fatigue in patients with breast cancer: A pilot study.

    Science.gov (United States)

    Desbiens, Christine; Filion, Myriam; Brien, Marie-Chantale; Hogue, Jean-Charles; Laflamme, Christian; Lemieux, Julie

    2017-10-01

    Physical activity improves the quality of life of cancer survivors, but whether there is a difference between individual vs. group physical activity is unknown. To compare fatigue at 12 weeks in breast cancer survivors after participation in a program of group vs. individual video-assisted physical activity. This was a randomized phase II pilot study carried out in breast cancer survivors at a tertiary breast cancer center. Eligible patients were randomized to individual or group 12-week physical activity program. The primary outcome was fatigue (FACT-F). Aerobic capacity (6-min walk test), muscular strength, and quality-of-life (FACT-G and FACT-B) were assessed. Because of poor accrual, 200 consecutive breast cancer patients were surveyed about their physical activity habits to assess reasons for low recruitment. For all participants (n = 26; n = 12 for group vs. n = 14 for individual), there were some improvement in FACT-F, FACT-G, FACT-B, physical activity level, aerobic capacity, and shoulder strength. Among the 200 patients surveyed, 58% were interested to increase their physical activity level, 15% declared that they were already exercising enough, 9% declared being unable to, 3% declared having no time, and 2% declared having no interest, and other reasons (13%). Among the 200 patients surveyed, 25% preferred in group, 57% preferred alone, and 18% had no preference. Low recruitment precluded conclusions about the efficacy of physical activity practiced in group vs. individually, but both groups derived a benefit. Low willingness to change exercising habits could be the biggest barrier to physical activity in breast cancer survivors. Copyright © 2017 Elsevier Ltd. All rights reserved.

  19. Individual and Group-Based Engagement in an Online Physical Activity Monitoring Program in Georgia.

    Science.gov (United States)

    Smith, Matthew Lee; Durrett, Nicholas K; Bowie, Maria; Berg, Alison; McCullick, Bryan A; LoPilato, Alexander C; Murray, Deborah

    2018-06-07

    Given the rising prevalence of obesity in the United States, innovative methods are needed to increase physical activity (PA) in community settings. Evidence suggests that individuals are more likely to engage in PA if they are given a choice of activities and have support from others (for encouragement, motivation, and accountability). The objective of this study was to describe the use of the online Walk Georgia PA tracking platform according to whether the user was an individual user or group user. Walk Georgia is a free, interactive online tracking platform that enables users to log PA by duration, activity, and perceived difficulty, and then converts these data into points based on metabolic equivalents. Users join individually or in groups and are encouraged to set weekly PA goals. Data were examined for 6,639 users (65.8% were group users) over 28 months. We used independent sample t tests and Mann-Whitney U tests to compare means between individual and group users. Two linear regression models were fitted to identify factors associated with activity logging. Users logged 218,766 activities (15,119,249 minutes of PA spanning 592,714 miles [41,858,446 points]). On average, group users had created accounts more recently than individual users (P < .001); however, group users logged more activities (P < .001). On average, group users logged more minutes of PA (P < .001) and earned more points (P < .001). Being in a group was associated with a larger proportion of weeks in which 150 minutes or more of weekly PA was logged (B = 20.47, P < .001). Use of Walk Georgia was significantly higher among group users than among individual users. To expand use and dissemination of online tracking of PA, programs should target naturally occurring groups (eg, workplaces, schools, faith-based groups).

  20. Conclusive report on the activities of the Containment Expert Group 1975-87

    International Nuclear Information System (INIS)

    Balz, W.; Dufresne, J.

    1988-01-01

    The report summarizes the results of the activities of the CONT Expert Group, a subgroup of the CEC Fast Reactor Safety Working Group (SWG). The CONT group's work has over the last 12 years (1975-87) covered a wide spectrum of problems related to the behaviour of the primary containment of a sodium-cooled fast reactor following an accident releasing a large amount of mechanical energy. In particular the CONT group followed closely the code development and validation (COVA) programme carried out at the JRC Ispra. This activity also included an assessment of related material programmes. From a comparison of containment codes and a sensitivity analysis, it was concluded that the codes developed in the EC Member States and at the JRC Ispra allow to treat the consequences of a hypothetical core-disruptive accident on primary containment with adequate accuracy. Consequently the the group considered its mandate fulfilled and terminated its activities

  1. Air Force Supply Management Analysis of Activity Groups Financial Reports, Prices, and Cash Management

    National Research Council Canada - National Science Library

    1998-01-01

    The Air Force supply management activity group provides about two million types of inventory items, including weapon system spare parts, fuels, and medical-dental supplies, to customers which consist...

  2. An investigation of the functional groups on the surface of activated carbons

    Directory of Open Access Journals (Sweden)

    MARYTE DERVINYTE

    2004-05-01

    Full Text Available Activated carbons were produced in the laboratory from wood using a 20-run Plackett–Burman experimental design for 19 factors. The obtained batches of activated carbon were analysed by potentiometric titration and FTIR spectroscopy to determine the surface functional groups. The results obtained by potentiometric titration displayed the distribution of individual acidity constants of those groups in the pK range. Considering this parameter, the surface functional groups were divided into carboxyl, lactone and phenol. The linear regression equations reflecting the influence of each operation used for the synthesis on the amount of these functional groups in the obtained activated carbons were generated. The FTIR spectra were used in parallel for the evaluation of the amount and the type of the surface functional groups. Relationships between the two data sets obtained by potentiometric titration and FTIR spectroscopy were evaluated by correlation analysis. It was established that the amount of surface functional groups determined by potentiometric titration positively correlates with the intensity of the peaks of hydrophilic functional groups in the FTIR spectra. At the same time, the negative correlation between potentiometrically determined amount of surface functional groups and the intensity of peaks of hydrophobic functional groups was observed. Most probably, these non-polar formations can take part in the interaction of carbon surface with H+/OH- ions and diminish the strength of existent functional groups.

  3. Barriers for recess physical activity: a gender specific qualitative focus group exploration

    DEFF Research Database (Denmark)

    Pawlowski, Charlotte Skau; Tjørnhøj-Thomsen, Tine; Schipperijn, Jasper

    Background: Many children, in particular girls, do not reach the recommended amount of daily physical activity. School recess provides an opportunity for both boys and girls to be physically active, but barriers to recess physical activity are not well understood. This study explores gender...... (53 boys) from fourth grade, with a mean age of 10.4 years. The focus groups included an open group discussion, go-along group interviews, and a gender segregated post-it note activity. A content analysis of the post-it notes was used to prioritize the children´s perceived barriers. This was verified...... barriers, there were both inter- and intra-gender differences in the children´s perceptions of these barriers. Weather was a barrier for all children, apart from the most active boys. Conflicts were perceived as a barrier particularly for those boys who played ballgames. Girls said they would like to have...

  4. 75 FR 51525 - Railroad Safety Advisory Committee (RSAC); Working Group Activity Update

    Science.gov (United States)

    2010-08-20

    .... The Working Group continues to work on after arrival orders, and at the September 25-26, 2008, meeting... protecting persons who work on, under, or between rolling equipment and persons applying, removing or.... 63] Railroad Safety Advisory Committee (RSAC); Working Group Activity Update AGENCY: Federal Railroad...

  5. Need for Cognition and Active Information Search in Small Student Groups

    Science.gov (United States)

    Curseu, Petru Lucian

    2011-01-01

    In a sample of 213 students organized in 44 groups this study tests the impact of need for cognition on active information search by using a multilevel analysis. The results show that group members with high need for cognition seek more advice in task related issues than those with low need for cognition and this pattern of information exchange is…

  6. Brazilian pediatric research groups, lines of research, and main areas of activity

    Directory of Open Access Journals (Sweden)

    Priscila H.A. Oliveira

    2015-05-01

    Conclusions: The pediatric research groups in Brazil have relevant scientific production, including works published in international publications, and are concentrated in regions with higher socioeconomic index. Most groups registered in CNPq started their activity in the last five years (46%, reflecting the recent growth of scientific production in this area.

  7. Similarity-based grouping to support teachers on collaborative activities in exploratory learning environments

    OpenAIRE

    Gutierrez-Santos, Sergio; Mavrikis, M.; Geraniou, E.; Poulovassilis, Alexandra

    2016-01-01

    This paper describes a computer-based tool that helps teachers group their students for collaborative activities in the classroom, the challenge being to organise groups of students based on their recent work so that their collaboration results in meaningful interactions. Students first work on an exploratory task individually, and then the computer suggests possible groupings of students to the teacher. The complexity of the tasks is such that teachers would require too long a time to create...

  8. Does the group leader matter? The impact of monitoring activities and social ties of group leaders on the repayment performance of groupbased lending Eritrea

    NARCIS (Netherlands)

    Hermes, Niels; Lensink, Robert; Mehrteab, Habteab T.

    2005-01-01

    This paper analyzes whether the effects of monitoring and social ties of the group leader and other group members on repayment performance of groups differ, using data from an extensive questionnaire held in Eritrea among participants of 102 groups. We hypothesize that the monitoring activities and

  9. Guía para la identificación genérica de larvas de quironómidos (Diptera: Chironomidae de la Sabana de Bogotá. III subfamilias Tanypodinae, Podonominae y Diamesinae

    Directory of Open Access Journals (Sweden)

    Ruiz Moreno Jeanet Liliana

    2000-07-01

    Full Text Available A diagnosis of larvae in the subfamilies Tanypodinae and Podonominae (Chironomidae is provided, based on macroscopic and microscopic characters. A key to the genera recorded in streams of the Sabana de Bogotá and surrounding mountains is presented. Additionally, diagnoses are given for the genera Podonomus and Parochlus of the subfamily Podonominae and the genus araheptagyia, of the subfamily Diamesinae.Se presentan diagnosis de las subfamilias Tanypodinae y Podonominae (Diptera: Chironomidael, incluyendo características macroscópicas que diferencian las larvas de la subfamilia y microscópicas que permiten diferenciar los géneros, que hasta el momento se han encontrado en las aguas corrientes de la sabana de Bogotá y sus montañas circundantes. Además, se presenta una clave para la identificación de los diez géneros registrados para la subfamilia Tanypodinae, así como una diagnosis de los géneros: Podonomus y Parochlus, de la subfamilia Podominae y el género Paraheptagyia, de la subfamilia Diamesinae.

  10. Procedencia botánica del polen almacenado por Apís mellífera, en alrededores de la-Sabana de Bogotá. I:Polen en las Colmenas

    Directory of Open Access Journals (Sweden)

    Ortiz de Boada Dilia

    1987-12-01

    Full Text Available En este trabajo se analizó el polen almacenado en 30 colmenas de Apis mellifera, en tres apiarios de los alrededores de la Sabana de Bogotá. Apiario A1 de la vereda de Los Puentes Municipio de Mosquera. Conformación vegetal: El ecosistema de la región corresponde al bosque seco montano bajo, con unos 5 meses de verano. A2 en la zona urbana de la Sabana, Calle 145 No. 14-31 Barrio Los Cedritos, el ecosistema de la región corresponde a bosque de transición seco y húmedo montano bajo con períodos de lluvias fuertes por 6 meses al año. A3 Monasterio Santa María de Usme con· ecosistema bosque húmedo montano bajo
    con per íodos de lluvias alternando con épocas de verano. Se hicieron colectas durante 2 años con colección de referencia palinológica. En el estudio se diferenciaron 74 tipos de polen
    en total, de estos 37 corresponden a especies melliferas destacándose entre los Myrtaceae Eucaliptus globulus, Caprifoliaceae Sambucus nigrum, Tropeolaceae Tropeolum mejus, Compositae Chrysanthemum sp, y Oleaceae
    Fraxinus sp.

  11. Thrips Species (Thysanoptera thripidae more common in cut flower greenhouse in Bogotá plateau Especies de trips (Thysanoptera:Thripidae mas comunes en invernaderos de flores de la sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Corredor Dario

    1993-12-01

    Full Text Available We report sorne species found in and around greenhouses at the Bogotá plateau, whith keys and drawings to make an easier identification. Three genera were found: Taeniothrips, Thrips and
    FrankDniella; this last genus has the highest number of species found inthe greenhouses. A key to identify F. occidentalis, F. auripes, F.panamensís, F. minuta, F. colombiana, Taeniothrips simplex and thrips tabaci, and a list of hosts for each species in and out of the greenhouses are presented.Se registran algunas especies de trips hallados dentro y alrededor de invernaderos en la sabana de Bogotá, se proponen claves y esquemas para facilitar su determinación. Se encontraron tres géneros a saber: Taeniothrips, Thrips y Frank#niella; este último género presenta el mayor número de especies en los invernaderos de la Sabana de Bogotá. Se propone una clave para las especies de F. occidentaKs, F.
    auripes, F. panamensis, F. minuta, F. colombiana, Taeniothrips simplex y Thrips tabaci. También, se presenta una lista de plantas hospedantes para cada especie de trips, dentro y fuera de invernaderos.

  12. Using Group Drawings Activities to Facilitate the Understanding of the Systemic Aspects of Projects

    Directory of Open Access Journals (Sweden)

    João Alberto Arantes do Amaral

    2017-04-01

    Full Text Available In this article, we present our findings regarding promoting group drawing activities in order to facilitate the learning of systemic aspects of projects. We discuss the approach we used to engage the students and foster learning in our classes. We used group drawing activities in two project management undergraduate courses. The courses, which involved 41 students, took place during the second semester of 2016 in a public university in Brazil. We conducted qualitative research, using qualitative observation and focus group interviews. In order to gauge the effects of the use of this educational technique, we followed the five-phased qualitative analysis method, combined with a systems analysis of the data obtained from observation. Five recurrent themes emerged: 1 Making drawings in groups helps content retention and facilitates connections between the concepts explained by the professor; 2 Making drawings in groups promotes knowledge sharing among team members; 3 Making drawings in group fosters creativity and communication between students; 4 Drawing in groups reduces the students’ boredom, makes the lecture more dynamic and interesting; 5 Drawing in groups reinforces bonds between students. Our systems analysis suggests that group drawing improves student participation in classroom activities, strengthens bonds between students, and enhances learning.

  13. Taking It to the Classroom: Number Board Games as a Small Group Learning Activity

    Science.gov (United States)

    Ramani, Geetha B.; Siegler, Robert S.; Hitti, Aline

    2012-01-01

    We examined whether a theoretically based number board game could be translated into a practical classroom activity that improves Head Start children's numerical knowledge. Playing the number board game as a small group learning activity promoted low-income children's number line estimation, magnitude comparison, numeral identification, and…

  14. What Do We Want Small Group Activities For? Voices from EFL Teachers in Japan

    Science.gov (United States)

    Kato, Yoshitaka

    2016-01-01

    This paper discusses the fundamental issue of why small group activities are utilized in the language learning classroom. Although these activities have gained popularity in the field of Teaching English as a Second Language (TESL), supported by a sound theoretical base, few studies have so far examined the reasons why language teachers are…

  15. Resident-Assisted Montessori Programming (RAMP): training persons with dementia to serve as group activity leaders.

    Science.gov (United States)

    Camp, Cameron J; Skrajner, Michael J

    2004-06-01

    The purpose of this study was to determine the effects of an activity implemented by means of Resident-Assisted Montessori Programming (RAMP). Four persons with early-stage dementia were trained to serve as leaders for a small-group activity played by nine persons with more advanced dementia. Assessments of leaders' ability to learn the procedures of leading a group, as well as their satisfaction with this role, were taken, as were measures of players' engagement and affect during standard activities programming and RAMP activities. Leaders demonstrated the potential to fill the role of group activity leader effectively, and they expressed a high level of satisfaction with this role. Players' levels of positive engagement and pleasure during the RAMP activity were higher than during standard group activities. This study suggests that to the extent that procedural learning is available to persons with early-stage dementia, especially when they are assisted with external cueing, these individuals can successfully fill the role of volunteers when working with persons with more advanced dementia. This can provide a meaningful social role for leaders and increase access to high quality activities programming for large numbers of persons with dementia. Copyright 2004 The Gerontological Society of America

  16. REECo activities and sample logistics in support of the Nevada Applied Ecology Group

    International Nuclear Information System (INIS)

    Wireman, D.L.; Rosenberry, C.E. Jr.

    1975-01-01

    Activities and sample logistics of Reynolds Electrical and Engineering Co., Inc. (REECo), in support of the Nevada Applied Ecology Group (NAEG), are discussed in this summary report. Activities include the collection, preparation, and shipment of samples of soils, vegetation, and small animals collected at Pu-contaminated areas of the Nevada Test Site and Tonopah Test Range. (CH)

  17. Supporting intra-group social metacognitive activities with technology: A grammar learning game

    NARCIS (Netherlands)

    Molenaar, I.; Horvers, A.; Desain, P.W.M.

    2017-01-01

    This study investigates the effects of a technology enhanced collaborative grammar learning activity on students sentence parsing and formulation. These types of collaborative learning activities for grammar education are expected to support more effective learning. Yet, effective intra-group social

  18. Using Group Drawings Activities to Facilitate the Understanding of Systemic Aspects of Projects

    DEFF Research Database (Denmark)

    Arantes do Amaral, João Alberto; Hess, Aurélio; Gonçalves, Paulo

    2017-01-01

    In this article, we present our findings regarding promoting group drawing activities in order to facilitate the learning of systemic aspects of projects. We discuss the approach we used to engage the students and foster learning in our classes. We used group drawing activities in two project...... technique, we followed the five-phased qualitative analysis method, combined with a systems analysis of the data obtained from observation. Five recurrent themes emerged: 1) Making drawings in groups helps content retention and facilitates connections between the concepts explained by the professor; 2...

  19. Brazilian pediatric research groups, lines of research, and main areas of activity

    Directory of Open Access Journals (Sweden)

    Priscila H.A. Oliveira

    2015-06-01

    Full Text Available OBJECTIVES: The Brazilian scientific production in the pediatrics field has been increasing significantly. It is important to identify the distribution and activity of these groups in the country and the main study areas, contributing with data for better resource allocation by institutions. METHODS: An active research was conducted in the National Council of Technological and Scientific Development (Conselho Nacional de Desenvolvimento Científico e Tecnológico [CNPq] website, using as filters the macro area of the research group (Health Sciences, the area (Medicine, and descriptors related to pediatrics. Research lines and main area of pediatric research groups were classified according to the subject predominantly studied by each group. The scientific production of the leader of the pediatric research group between 2011 and 2014 was also analyzed. RESULTS: Most pediatric research groups in Brazil have more than five years of activity and are concentrated in the Southeast and South regions of the country; São Paulo, Rio Grande do Sul, and Minas Gerais are the states with most groups. Of the 132 specific pediatric research groups analyzed, 14.4% have lines of research in multiple areas and 11.4% in child and adolescent health. Among the 585 lines of research of these groups, the most prevalent areas were: oncology, infectious diseases, epidemiology, and gastroenterology. CONCLUSIONS: The pediatric research groups in Brazil have relevant scientific production, including works published in international publications, and are concentrated in regions with higher socioeconomic index. Most groups registered in CNPq started their activity in the last five years (46%, reflecting the recent growth of scientific production in this area.

  20. Listening to young people with special needs: the influence of group activities.

    Science.gov (United States)

    Burke, Peter

    2005-12-01

    The article reports on the experiences of group activities within an area of Yorkshire that helped young people with special needs to express their views and opinions. Significant issues were raised by the ethics of undertaking work with young people and these are reviewed. The young people involved in the research reported that their participation in the groups developed their self-confidence and advocacy skills. This led them to be more confident in expressing their needs at school and in the community. To establish wider generalizability for the study findings, the Yorkshire group activities were compared with another similar group in London where further data were collected from the young people involved. In facilitating group activities, willing staff were an important addition to the group because their presence provided and encouraged positive reactions to the distinctive achievements of the young people themselves. In both groups, members were committed to participation in project-based activities that raised their self-esteem and helped establish a sense of their own identity and purpose.

  1. Synthesis and Insecticidal Activities of Novel Analogues of Chlorantraniliprole Containing Nitro Group

    Institute of Scientific and Technical Information of China (English)

    FENG Qi; WANG Ming-zhong; XIONG Li-xia; LIU Zhi-li; LI Zheng-ming

    2011-01-01

    Twelve novel analogues of chlorantraniliprole containing nitro group were synthesized,and their structures were characterized by 1H NMR and high-resolution mass spectrometry(HRMS).Their evaluated insecticidal activities against oriental armyworm(Mythimna separata) indicate that the nitro-containing analogues showed favorable insecticidal activities,while the activity of compounds 5g at 0.25 mg/L was 40%,but still lower than chlorantraniliprole.

  2. Activity groups for persons with dementia: Personal predictors of participation, engagement and mood.

    Science.gov (United States)

    Cohen-Mansfield, Jiska

    2017-11-01

    This study examined the relationship between personal characteristics and attendance, engagement, sleep, and mood outcomes of persons with dementia participating in group activities. The purpose of this study is to examine which persons with dementia benefit most from group interventions. Sixty-nine persons with dementia were observed by research and therapeutic recreation staff during 10 types of group activities (reading aloud with discussion, choral-singing, baking, creative storytelling, brain games, active games, exercise, reminiscence poetry, holiday newsletter, and holiday discussions) on multiple outcomes (attendance duration, sleep, engagement, active participation, attitude, and positive mood). Correlations between these outcomes and personal characteristics (demographics, functional and medical characteristics, personal preferences for group activities) were conducted. Variables with significant correlations were then entered into regression analyses. Many of the personal characteristics were significantly correlated with the outcomes. Cognitive function was the most consistent predictor of all outcomes. Personal characteristics, particularly cognitive function, can predict the responses of persons with dementia during group activities. Copyright © 2017 Elsevier B.V. All rights reserved.

  3. Effects of group exercise on functional abilities: Differences between physically active and physically inactive women.

    Science.gov (United States)

    Cokorilo, Nebojsa; Mikalacki, Milena; Satara, Goran; Cvetkovic, Milan; Marinkovic, Dragan; Zvekic-Svorcan, Jelena; Obradovic, Borislav

    2018-03-30

    Aerobic exercises to music can have a positive effect on functional and motor skills of an exerciser, their health, as well as an aesthetic and socio-psychological component. The objective of this study was to determine the effects of reactive exercising in a group on functional capabilities in physically active and physically inactive women. A prospective study included 64 healthy women aged 40-60 years. The sample was divided into the experimental group (n= 36), i.e. physically active women who have been engaged in recreational group exercises at the Faculty of Sport and Physical Education, University of Novi Sad, Serbia, and the control group (n= 28), which consisted of physically inactive women. All the participants were monitored using the same protocol before and after the implementation of the research. All women had their height, weight, body mass index measured as well as spiroergometric parameters determined according to the Bruce protocol. A univariate analysis of variance has shown that there is a statistically significant difference between the experimental group and the control group in maximum speed, the total duration of the test, relative oxygen consumption, absolute oxygen consumption and ventilation during the final measurement. After the training intervention, the experimental group showed improvements in all the parameters analyzed compared with pretest values. The recreational group exercise model significantly improves aerobic capacity and functioning of the cardiovascular system. Therefore, it is essential for women to be involved more in any form of recreational group exercising in order to improve functional capacity and health.

  4. Basis of integrated approach to sports and recreational activities of students of special medical groups

    Directory of Open Access Journals (Sweden)

    L.V. Zaharova

    2014-02-01

    Full Text Available Purpose : to prove the superiority of techniques integrated approach to sports and recreational activities of students of special medical groups in the educational institution. Material / methods : the annual pedagogical experiment conducted on three groups that have been formed based on the results of preliminary studies based on diagnosis. Learning process based on the principle of improving training. Results : the advantages of an integrated approach to sports and recreational activities of students with disorders of the musculoskeletal system. Recommended approaches to increase physical and functional training. Also - the formation of a stable demand of motor activity, leading healthy lifestyles, in the acquisition of social status in the educational activity. Conclusions : the integrated approach will meet the educational needs of students to form a cultural competence of the individual in the preservation and conservation of health, ability to adapt and successfully implement their professional activities.

  5. Promoting Physical Activity With Group Pictures. Affiliation-Based Visual Communication for High-Risk Populations.

    Science.gov (United States)

    Reifegerste, Doreen; Rossmann, Constanze

    2017-02-01

    Past research in social and health psychology has shown that affiliation motivation is associated with health behavior, especially for high-risk populations, suggesting that targeting this motivation could be a promising strategy to promote physical activity. However, the effects that affiliation appeals (e.g., pictures depicting companionship during physical activities) and accompanying slogans have on motivating physical activity have been largely unexplored. Hence, our two studies experimentally tested the effects of exposure to affiliation-based pictures for overweight or less active people, as well as the moderating effect of affiliation motivation. The results of these two studies give some indication that group pictures (with or without an accompanying slogan) can be an effective strategy to improve high-risk populations' attitudes, self-efficacy, and intentions to engage in physical activity. Affiliation motivation as a personality trait did not interact with these effects, but was positively associated with attitudes, independent of the group picture effect.

  6. Specificity of a prodrug-activating enzyme hVACVase: the leaving group effect.

    Science.gov (United States)

    Sun, Jing; Dahan, Arik; Walls, Zachary F; Lai, Longsheng; Lee, Kyung-Dall; Amidon, Gordon L

    2010-12-06

    Human valacyclovirase (hVACVase) is a prodrug-activating enzyme for amino acid prodrugs including the antiviral drugs valacyclovir and valganciclovir. In hVACVase-catalyzed reactions, the leaving group of the substrate corresponds to the drug moiety of the prodrug, making the leaving group effect essential for the rational design of new prodrugs targeting hVACVase activation. In this study, a series of valine esters, phenylalanine esters, and a valine amide were characterized for the effect of the leaving group on the efficiency of hVACVase-mediated prodrug activation. Except for phenylalanine methyl and ethyl esters, all of the ester substrates exhibited a relatively high specificity constant (k(cat)/K(m)), ranging from 850 to 9490 mM(-1)·s(-1). The valine amide Val-3-APG exhibited significantly higher K(m) and lower k(cat) values compared to the corresponding ester Val-3-HPG, indicating poor specificity for hVACVase. In conclusion, the substrate leaving group has been shown to affect both binding and specific activity of hVACVase-catalyzed activation. It is proposed that hVACVase is an ideal target for α-amino acid ester prodrugs with relatively labile leaving groups while it is relatively inactivate toward amide prodrugs.

  7. Leisure-time Physical Activity Among Different Social Groups of Estonia: Results of the National Physical Activity Survey

    Directory of Open Access Journals (Sweden)

    Lusmägi Peeter

    2016-03-01

    Full Text Available According to the Eurobarometer (European Commission, 2010, 39% of the Estonian adult population is not physically active at all. This percentage is relatively high compared to other countries that are culturally close to Estonia; the corresponding figure of close neighbors Finland and Sweden is below 10%. The article aims to present the results of a survey of physical activity (n=1,009 conducted in Estonia in 2013 and analyzes physical activity levels across various social groups. The results of the article show that employment, age, education, and ethnicity are important factors for engaging in leisure-time physical activity in Estonia. Non-ethnic Estonians, the less educated, the elderly, the unemployed, and those on maternity leave are less engaged in regular leisure exercise than people in other social groups. The results of the article were used to develop Estonia’s Sports 2030 strategy.

  8. Work group I: Measures of the food and physical activity environment: instruments.

    Science.gov (United States)

    Saelens, Brian E; Glanz, Karen

    2009-04-01

    A work group was convened to identify the core challenges, content gaps, and corresponding possible solutions for improving food- and physical activity-environment instrumentation. Identified challenges included instrument proliferation, the scaling or grain of instruments and appropriate aggregation to the neighborhood or community level, and unknown sensitivity to change of most instruments. Solutions for addressing these challenges included establishing an interactive and real-time instrument repository, developing and enforcing high standards for instrument reporting, increasing community-researcher collaborations, and implementing surveillance of food and physical activity environment. Solid instrumentation will accelerate a better understanding of food- and physical activity-environment effects on eating and physical activity behaviors.

  9. Dinámica folicular en yeguas paso fino colombiano medido por ultrasonografía en la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Germán Ramírez

    2010-06-01

    Full Text Available Este estudio surgió como medio para obtener un parámetro de crecimiento diario folicular, momento de la ovulación, y determinar cuál es el ovario con mayor número de ovulaciones en la yegua de Paso Fino Colombiano con el fin de aportar algunos datos de dinámica folicular en la yegua de esta especie, ya que la información disponible en la literatura data generalmente en otras razas y condiciones diferentes al trópico. Para el desarrollo de este proyecto se tomaron como muestra cincuenta (50 yeguas ubicadas en la sabana de Bogotá: (Chía – Cundinamarca, a una altura de 2.652 metros sobre el nivel del mar, temperatura promedio de 12° C y pluviosidad 1.500 mm; la edad de los animales osciló entre los cinco y diez años. Se realizaron ecografías periódicas día por medio por palpación rectal, con el fin de realizar un seguimiento del crecimiento folicular una vez detectado un folículo dominante (>30 mm de diámetro, hasta su ovulación. Los datos fueron analizados por medio de estadística descriptiva, con desviación estándar, además de una prueba F para varianzas desiguales e iguales para determinar diferencias en el tamaño folicular a la ovulación y crecimiento diario folicular entre el ovario derecho e izquierdo. Teniendo como resultado que la yegua de paso fino colombiano tiene un crecimiento diario folicular de 2,04+/-0,63 mm, un tamaño folicular a la ovulación de 41,34+/-2,14 mm, y que de los cincuenta ciclos estrales analizados el 60% fue por el ovario izquierdo y el 40% restante por el ovario derecho. Las diferencias en cuanto a tamaño folicular a la ovulación no fueron significativas (P>0,50 entre los ovarios, mientras que para el crecimiento diario folicular sí hubo diferencia significativa (P<0,02 lo que significa que los folículos del ovario derecho tuvieron un crecimiento mayor a los del ovario izquierdo. Con estos resultados se obtuvo que la yegua de paso fino colombiano se comporta reproductivamente de

  10. Modeling Perceptual Grouping and Figure-Ground Segregation by Means of Active Reentrant Connections

    Science.gov (United States)

    Sporns, Olaf; Tononi, Giulio; Edelman, Gerald M.

    1991-01-01

    The segmentation of visual scenes is a fundamental process of early vision, but the underlying neural mechanisms are still largely unknown. Theoretical considerations as well as neurophysiological findings point to the importance in such processes of temporal correlations in neuronal activity. In a previous model, we showed that reentrant signaling among rhythmically active neuronal groups can correlate responses along spatially extended contours. We now have modified and extended this model to address the problems of perceptual grouping and figure-ground segregation in vision. A novel feature is that the efficacy of the connections is allowed to change on a fast time scale. This results in active reentrant connections that amplify the correlations among neuronal groups. The responses of the model are able to link the elements corresponding to a coherent figure and to segregate them from the background or from another figure in a way that is consistent with the so-called Gestalt laws.

  11. Modeling perceptual grouping and figure-ground segregation by means of active reentrant connections.

    Science.gov (United States)

    Sporns, O; Tononi, G; Edelman, G M

    1991-01-01

    The segmentation of visual scenes is a fundamental process of early vision, but the underlying neural mechanisms are still largely unknown. Theoretical considerations as well as neurophysiological findings point to the importance in such processes of temporal correlations in neuronal activity. In a previous model, we showed that reentrant signaling among rhythmically active neuronal groups can correlate responses along spatially extended contours. We now have modified and extended this model to address the problems of perceptual grouping and figure-ground segregation in vision. A novel feature is that the efficacy of the connections is allowed to change on a fast time scale. This results in active reentrant connections that amplify the correlations among neuronal groups. The responses of the model are able to link the elements corresponding to a coherent figure and to segregate them from the background or from another figure in a way that is consistent with the so-called Gestalt laws.

  12. Areva. Group dynamics and activities. Competitive environment and strategic perspectives. Release - October 2016

    International Nuclear Information System (INIS)

    2016-10-01

    After a synthesis which notably proposes a SWOT analysis of the Areva group, this report proposes a presentation of the Areva Group (general overview, mining, upstream and downstream poles, shareholder structure and stock market data, competitive environment). It gives an overview of the Areva group dynamics and of its activities through a presentation of an environment analysis (world electric power production, uranium production and consumption, operated nuclear plants in the world), a presentation of the group activity (turnover and order backlog, turnover per segment and per geographical area, operational and net income). It indicates important events and comments development axes: strategic orientations, new partnership with EDF, stronger presence in China, asset disposal, and organisation optimisation. Financial data are presented along with the main economic and financial indicators. Important statistical data are provided

  13. Salivary alpha amylase activity in human beings of different age groups subjected to psychological stress.

    Science.gov (United States)

    Sahu, Gopal K; Upadhyay, Seema; Panna, Shradha M

    2014-10-01

    Salivary alpha-amylase (sAA) has been proposed as a sensitive non-invasive biomarker for stress-induced changes in the body that reflect the activity of the sympathetic nervous system. Though several experiments have been conducted to determine the validity of this salivary component as a reliable stress marker in human subjects, the effect of stress induced changes on sAA level in different age groups is least studied. This article reports the activity of sAA in human subjects of different age groups subjected to psychological stress induced through stressful video clip. Differences in sAA level based on sex of different age groups under stress have also been studied. A total of 112 subjects consisting of both the male and female subjects, divided into two groups on basis of age were viewed a video clip of corneal transplant surgery as stressor. Activity of sAA from saliva samples of the stressed subjects were measured and compared with the activity of the samples collected from the subjects before viewing the clip. The age ranges of subjects were 18-25 and 40-60 years. The sAA level increased significantly in both the groups after viewing the stressful video. The increase was more pronounced in the younger subjects. The level of sAA was comparatively more in males than females in the respective groups. No significant change in sAA activity was observed after viewing the soothed video clip. Significant increase of sAA level in response to psychological stress suggests that it might act as a reliable sympathetic activity biochemical marker in different stages of human beings.

  14. A Dynamic Active Multicast Group Access Control Framework Based on Trust Management System

    Institute of Scientific and Technical Information of China (English)

    YANG Chang; CHEN Xiaolin; ZHANG Huanguo

    2006-01-01

    The current multicast model provides no access control mechanism. Any host can send data directly to a multicast address or join a multicast group to become a member, which brings safety problems to multicast. In this paper, we present a new active multicast group access control mechanism that is founded on trust management. This structure can solve the problem that exists in multicast members' access control and distributing authorization of traditional IP multicast.

  15. Interventions to improve physical activity among socioeconomically disadvantaged groups: an umbrella review.

    Science.gov (United States)

    Craike, Melinda; Wiesner, Glen; Hilland, Toni A; Bengoechea, Enrique Garcia

    2018-05-15

    People from socioeconomically disadvantaged population groups are less likely to be physically active and more likely to experience adverse health outcomes than those who are less disadvantaged. In this umbrella review we examined across all age groups, (1) the effectiveness of interventions to improve physical activity among socioeconomically disadvantaged groups, (2) the characteristics of effective interventions, and (3) directions for future research. PubMed/MEDLINE and Scopus were searched up to May 2017 to identify systematic reviews reporting physical activity interventions in socioeconomically disadvantaged populations or sub-groups. Two authors independently conducted study screening and selection, data extraction (one author, with data checked by two others) and assessment of methodological quality using the 'Assessment of Multiple Systematic Reviews' scale. Results were synthesized narratively. Seventeen reviews met our inclusion criteria, with only 5 (30%) reviews being assessed as high quality. Seven (41%) reviews focused on obesity prevention and an additional four focused on multiple behavioural outcomes. For pre school children, parent-focused, group-based interventions were effective in improving physical activity. For children, school-based interventions and policies were effective; few studies focused on adolescents and those that did were generally not effective; for adults, there was mixed evidence of effectiveness but characteristics such as group-based interventions and those that focused on physical activity only were associated with effectiveness. Few studies focused on older adults. Across all ages, interventions that were more intensive tended to be more effective. Most studies reported short-term, rather than longer-term, outcomes and common methodological limitations included high probability of selection bias, low response rates, and high attrition. Interventions can be successful at improving physical activity among children from

  16. Ultradian activity rhythms in large groups of newly hatched chicks (Gallus gallus domesticus).

    Science.gov (United States)

    Nielsen, B L; Erhard, H W; Friggens, N C; McLeod, J E

    2008-07-01

    A clutch of young chicks housed with a mother hen exhibit ultradian (within day) rhythms of activity corresponding to the brooding cycle of the hen. In the present study clear evidence was found of ultradian activity rhythms in newly hatched domestic chicks housed in groups larger than natural clutch size without a mother hen or any other obvious external time-keeper. No consistent synchrony was found between groups housed in different pens within the same room. The ultradian rhythms disappeared with time and little evidence of group rhythmicity remained by the third night. This disappearance over time suggests that the presence of a mother hen may be pivotal for the long-term maintenance of these rhythms. The ultradian rhythm of the chicks may also play an important role in the initiation of brooding cycles during the behavioural transition of the mother hen from incubation to brooding. Computer simulations of individual activity rhythms were found to reproduce the observations made on a group basis. This was achievable even when individual chick rhythms were modelled as independent of each other, thus no assumptions of social facilitation are necessary to obtain ultradian activity rhythms on a group level.

  17. Summary of the activities of the ISAM Confidence Building Working Group

    International Nuclear Information System (INIS)

    Dolinar, G.M.; Batandjieva, B.

    2002-01-01

    During the early stages of the ISAM project confidence building was a relatively new topic in the radioactive waste disposal literature, but it was beginning to receive some attention. Although almost all safety assessment activities are intended to provide a level of confidence in the results of the assessment, considering the activities from the viewpoint of how they contributed to the decision making of various 'audiences' was relatively new. The ISAM project included the Confidence Building Working Group (CBWG) to examine the topic of Confidence Building and this paper provides a summary of the working group findings. (author)

  18. ACT-1000. Group activation cross-section library for WWER-1000 type reactors

    Energy Technology Data Exchange (ETDEWEB)

    Zolotarev, K I; Pashchenko, A B [National Research Centre - A.I. Leipunsky Institute for Physics and Power Engineering, Obninsk (Russian Federation)

    2001-10-01

    The ACT-1000, a problem-oriented library of group-averaged activation cross-sections for WWER-1000 type reactors, is based on evaluated microscopic cross-section data files. The ACT-1000 data library was designed for calculating induced activity for the main dose-generated nuclides contained in WWER-1000 structural materials. In preparing the ACT-1000 library, 47 group-averaged cross-section data for the 10{sup -9}-17.33 MeV energy range were used to calculate the spatial-energy neutron flux distribution. (author)

  19. Leadership in physical activity groups for older adults: a qualitative analysis.

    Science.gov (United States)

    Estabrooks, Paul A; Munroe, Krista J; Fox, Elizabeth H; Gyurcsik, Nancy C; Hill, Jennie L; Lyon, Robert; Rosenkranz, Sara; Shannon, Vanessa R

    2004-07-01

    The purpose of this study was to determine whether a theory-based framework could be used to deductively identify and understand the characteristics of motivational leaders of physical activity groups for older adults. Participants were 23 older adults (mean age = 78.5 +/- 8.0 years, 65% women). An interview-guide approach was employed to elicit older adults' thoughts on important characteristics of physical activity group leaders. The data suggested that effective leaders are those whom the participants feel are properly qualified, are able to develop a personal bond with participants, and can use their knowledge and the group to demonstrate collective accomplishments. It was concluded that the findings could be used to extend the leadership activities beyond the traditional technical performance and individual feedback to include activities of social integration. Furthermore, the conceptual framework identified can serve as a valuable tool in guiding future researchers in their examination of leadership in physical activity groups for older adults. Copyright 2004 Human Kinetics Publishers, Inc.

  20. Research Activities of Geotechnical Research Group of NIIS from the Past to Present

    Science.gov (United States)

    Horii, N.; Toyosawa, Y.; Tamate, S.; Itoh, K.

    In this paper, firstly the memories of Prof. Tatsuoka's laboratory and research works carried out when the first author visited Prof. Tatsuoka's laboratory as a visiting researcher from May 1986 for about 1 year are described. Secondly, the research activities of Geotechnical Research Group of NIIS are introduced. Main emphasis is given on the research activities conducted using old geotechnical centrifuge (NIIS Mark-I centrifuge) and newly developed geotechnical centrifuge (NIIS Mark-II centrifuge).

  1. Barriers for recess physical activity: a gender specific qualitative focus group exploration.

    Science.gov (United States)

    Pawlowski, Charlotte Skau; Tjørnhøj-Thomsen, Tine; Schipperijn, Jasper; Troelsen, Jens

    2014-06-23

    Many children, in particular girls, do not reach the recommended amount of daily physical activity. School recess provides an opportunity for both boys and girls to be physically active, but barriers to recess physical activity are not well understood. This study explores gender differences in children's perceptions of barriers to recess physical activity. Based on the socio-ecological model four types of environmental barriers were distinguished: natural, social, physical and organizational environment. Data were collected through 17 focus groups (at 17 different schools) with in total 111 children (53 boys) from fourth grade, with a mean age of 10.4 years. The focus groups included an open group discussion, go-along group interviews, and a gender segregated post-it note activity. A content analysis of the post-it notes was used to rank the children's perceived barriers. This was verified by a thematic analysis of transcripts from the open discussions and go-along interviews. The most frequently identified barriers for both boys and girls were weather, conflicts, lack of space, lack of play facilities and a newly-found barrier, use of electronic devices. While boys and girls identified the same barriers, there were both inter- and intra-gender differences in the perception of these barriers. Weather was a barrier for all children, apart from the most active boys. Conflicts were perceived as a barrier particularly by those boys who played ballgames. Girls said they would like to have more secluded areas added to the school playground, even in large schoolyards where lack of space was not a barrier. This aligned with girls' requests for more "hanging-out" facilities, whereas boys primarily wanted activity promoting facilities. Based on the results from this study, we recommend promoting recess physical activity through a combination of actions, addressing barriers within the natural, social, physical and organizational environment.

  2. Modeling perceptual grouping and figure-ground segregation by means of active reentrant connections.

    OpenAIRE

    Sporns, O; Tononi, G; Edelman, G M

    1991-01-01

    The segmentation of visual scenes is a fundamental process of early vision, but the underlying neural mechanisms are still largely unknown. Theoretical considerations as well as neurophysiological findings point to the importance in such processes of temporal correlations in neuronal activity. In a previous model, we showed that reentrant signaling among rhythmically active neuronal groups can correlate responses along spatially extended contours. We now have modified and extended this model ...

  3. College students’ perceptions of a caring climate in group physical activity classes

    Directory of Open Access Journals (Sweden)

    Newland Aubrey

    2017-02-01

    Full Text Available Study aim: Research suggests that physical activity rates decline sharply after high school. The pattern of activity or inactivity during college tends to persist into adulthood. A critical need exists for examination of strategies to engage college-age students in physical activity habits. One way to do this is through physical activity courses offered in colleges. This study examines the relationship between perceptions of a caring psychological climate and group connectedness, enjoyment, and attitudes toward classmates and the instructor in group physical activity courses. Material and methods: Participants were 174 students (107 males and 67 females; Mage = 21.71 enrolled in exercise, martial arts, and sports courses at a large university in the Mountain West. Results: Perceptions of a caring climate were significantly related to enhanced feelings of group connectedness, heightened enjoyment, and more positive attitudes toward classmates and instructor. Discussion: These findings suggest that a strategy to foster engagement in physical activity courses on campus is to train instructors to value, support, and welcome students.

  4. Involving postgraduate's students in undergraduate small group teaching promotes active learning in both

    Science.gov (United States)

    Kalra, Ruchi; Modi, Jyoti Nath; Vyas, Rashmi

    2015-01-01

    Background: Lecture is a common traditional method for teaching, but it may not stimulate higher order thinking and students may also be hesitant to express and interact. The postgraduate (PG) students are less involved with undergraduate (UG) teaching. Team based small group active learning method can contribute to better learning experience. Aim: To-promote active learning skills among the UG students using small group teaching methods involving PG students as facilitators to impart hands-on supervised training in teaching and managerial skills. Methodology: After Institutional approval under faculty supervision 92 UGs and 8 PGs participated in 6 small group sessions utilizing the jigsaw technique. Feedback was collected from both. Observations: Undergraduate Feedback (Percentage of Students Agreed): Learning in small groups was a good experience as it helped in better understanding of the subject (72%), students explored multiple reading resources (79%), they were actively involved in self-learning (88%), students reported initial apprehension of performance (71%), identified their learning gaps (86%), team enhanced their learning process (71%), informal learning in place of lecture was a welcome change (86%), it improved their communication skills (82%), small group learning can be useful for future self-learning (75%). Postgraduate Feedback: Majority performed facilitation for first time, perceived their performance as good (75%), it was helpful in self-learning (100%), felt confident of managing students in small groups (100%), as facilitator they improved their teaching skills, found it more useful and better identified own learning gaps (87.5%). Conclusions: Learning in small groups adopting team based approach involving both UGs and PGs promoted active learning in both and enhanced the teaching skills of the PGs. PMID:26380201

  5. A method to quantify movement activity of groups of animals using automated image analysis

    Science.gov (United States)

    Xu, Jianyu; Yu, Haizhen; Liu, Ying

    2009-07-01

    Most physiological and environmental changes are capable of inducing variations in animal behavior. The behavioral parameters have the possibility to be measured continuously in-situ by a non-invasive and non-contact approach, and have the potential to be used in the actual productions to predict stress conditions. Most vertebrates tend to live in groups, herds, flocks, shoals, bands, packs of conspecific individuals. Under culture conditions, the livestock or fish are in groups and interact on each other, so the aggregate behavior of the group should be studied rather than that of individuals. This paper presents a method to calculate the movement speed of a group of animal in a enclosure or a tank denoted by body length speed that correspond to group activity using computer vision technique. Frame sequences captured at special time interval were subtracted in pairs after image segmentation and identification. By labeling components caused by object movement in difference frame, the projected area caused by the movement of every object in the capture interval was calculated; this projected area was divided by the projected area of every object in the later frame to get body length moving distance of each object, and further could obtain the relative body length speed. The average speed of all object can well respond to the activity of the group. The group activity of a tilapia (Oreochromis niloticus) school to high (2.65 mg/L) levels of unionized ammonia (UIA) concentration were quantified based on these methods. High UIA level condition elicited a marked increase in school activity at the first hour (P<0.05) exhibiting an avoidance reaction (trying to flee from high UIA condition), and then decreased gradually.

  6. Impacto socioeconómico de los fenómenos El Niño y La Niña en la Sabana de Bogotá durante el siglo XX

    Directory of Open Access Journals (Sweden)

    José Daniel Pabón

    2007-01-01

    Full Text Available Se presentan los resultados del análisis de la variabilidad climática asociada al ciclo ENOS para la Sabana de Bogotá. Para el análisis se tomaron los datos de anomalías de temperatura superficial del mar en las zonas EN 1+2, 3, 4 y 3+4 del Pacífico tropical, la temperatura media mensual del aire y de precipitación mensual. Se identificó una relación inversa entre las anomalías de TSM y la precipitación: condiciones cálidas (anomalías positivas de TSM reducen la precipitación regional, mientras que las condiciones frías (anomalías negativas asociadas a La Niña la incrementan. En el caso de la relación de las anomalías de TSM y la TMMA se observó una correspondencia directa, es decir, a ascenso de la TSM en el Pacifico tropical corresponden ascensos en la TMMA de la Sabana de Bogotá. Este efecto climático del ciclo ENOS en la Sabana de Bogotá durante el siglo XX ha traído impactos socioeconómicos considerables a la región. El evento El Niño desencadena en la región limitaciones en la disponibilidad de agua para diferentes propósitos (abastecimiento a la población, agricultura, industria, lo que ha afectado la producción agrícola y ha llevado al incremento temporal de precios al consumidor. Bajo el efecto climático del fenómeno El Niño se incrementa la frecuencia de los incendios de la cobertura vegetal, lo que afecta de manera especial los ecosistemas de la región. Las condiciones La Niña traen crecientes súbitas y deslizamientos (en las zonas de alta pendiente de los cerros orientales, principalmente e inundaciones en las partes bajas (en especial en las zonas ribereñas de los ríos Bogotá, Tunjuelo y San Cristóbal, así como anegamiento de terrenos. Esto impacta directamente en las viviendas y la población de sectores urbanos y rurales.

  7. Impacto socioeconómico de los fenómenos El Niño y La Niña en la Sabana de Bogotá durante el siglo xx

    Directory of Open Access Journals (Sweden)

    Torres Germán

    2007-11-01

    Full Text Available Se presentan los resultados del análisis de la variabilidad climática asociada al ciclo ENOS para la Sabana de Bogotá. Para el análisis se tomaron los datos de anomalías de temperatura superficial del mar en las zonas EN 1+2, 3, 4 y 3+4 del Pacífico tropical, la temperatura media mensual del aire y de precipitación mensual. Se identificó una relación inversa entre las anomalías de TSM y la precipitación: condiciones cálidas (anomalías positivas de TSM reducen la precipitación regional, mientras que las condiciones frías (anomalías negativas asociadas a La Niña la incrementan. En el caso de la relación de las anomalías de TSM y la TMMA se observó una correspondencia directa, es decir, a ascenso de la TSM en el Pacifico tropical corresponden ascensos en la TMMA de la Sabana de Bogotá. Este efecto climático del ciclo ENOS en la Sabana de Bogotá durante el siglo XX ha traído impactos socioeconómicos considerables a la región. El evento El Niño desencadena en la región limitaciones en la disponibilidad de agua para diferentes propósitos (abastecimiento a la población, agricultura, industria, lo que ha afectado la producción agrícola y ha llevado al incremento temporal de precios al consumidor. Bajo el efecto climático del fenómeno El Niño se incrementa la frecuencia de los incendios de la cobertura vegetal, lo que afecta de manera especial los ecosistemas de la región. Las condiciones La Niña traen crecientes súbitas y deslizamientos (en las zonas de alta pendiente de los cerros orientales, principalmente e inundaciones en las partes bajas (en especial en las zonas ribereñas de los ríos Bogotá, Tunjuelo y San Cristóbal, así como anegamiento de terrenos. Esto impacta directamente en las viviendas y la población de sectores urbanos y rurales.

  8. Feeding activity in Groups of Newly Hatched Broiler Chicks: Effects of strain and hatching time

    DEFF Research Database (Denmark)

    Nielsen, Birte Lindstrøm; Juul-Madsen, Helle Risdahl; Steenfeldt, Sanna

    2010-01-01

    The feeding activity of 2 strains of broiler chickens was investigated during their first week of life in relation to their hatching time. Fast (Ross 308) and slow-growing (LB) strains were allocated to 1 of 3 (early, middle, or late hatch) single-strain groups of 80 to 100 as-hatched birds in 4...

  9. Singing as Language Learning Activity in Multilingual Toddler Groups in Preschool

    Science.gov (United States)

    Kultti, Anne

    2013-01-01

    This research focused on learning conditions in preschool that support multilingual children's linguistic development. The aim of this paper was to study singing activities through the experiences of ten multilingual children in toddler groups (one to three years of age) in eight Swedish preschools. A sociocultural theoretical approach is used to…

  10. Information Activities and Appropriation in Teacher Trainees' Digital, Group-Based Learning

    Science.gov (United States)

    Hanell, Fredrik

    2016-01-01

    Introduction: This paper reports results from an ethnographic study of teacher trainees' information activities in digital, group-based learning and their relation to the interplay between use and appropriation of digital tools and the learning environment. Method: The participants in the present study are 249 pre-school teacher trainees in…

  11. 76 FR 16478 - Proposed Information Collection (Disability Benefits Questionnaires-Group 2) Activity: Comment...

    Science.gov (United States)

    2011-03-23

    ... Collection (Disability Benefits Questionnaires--Group 2) Activity: Comment Request AGENCY: Veterans Benefits... Conditions (Vascular Diseases including Varicose Veins) Disability Benefits Questionnaire, VA Form 21-0960A-2. b. Hypertension Disability Benefits Questionnaire, VA Form 21- 0960A-3. c. Non-ischemic Heart...

  12. 76 FR 61149 - Agency Information Collection (Disability Benefits Questionnaires-Group 4) Activity Under OMB Review

    Science.gov (United States)

    2011-10-03

    ... Collection (Disability Benefits Questionnaires--Group 4) Activity Under OMB Review AGENCY: Veterans Benefits... INFORMATION: Titles: Cranial Nerve Conditions Disability Benefits Questionnaire, VA Form 21- 0960C3. Narcolepsy Disability Benefits Questionnaire, VA Form 21-0960C6. Fibromyalgia Disability Benefits...

  13. 76 FR 45008 - Proposed Information Collection (Disability Benefits Questionnaires-Group 4) Activity: Comment...

    Science.gov (United States)

    2011-07-27

    ... Collection (Disability Benefits Questionnaires--Group 4) Activity: Comment Request AGENCY: . Department of... Benefits Questionnaire, VA Form 21-0960C3. b. Narcolepsy Disability Benefits Questionnaire, VA Form 21-0960C6. c. Fibromyalgia Disability Benefits Questionnaire, VA Form 21- 0960C7. d. Seizure Disorders...

  14. 76 FR 35950 - Agency Information Collection (Disability Benefits Questionnaires-Group 3) Activity Under OMB Review

    Science.gov (United States)

    2011-06-20

    ... Collection (Disability Benefits Questionnaires--Group 3) Activity Under OMB Review AGENCY: Veterans Benefits... Questionnaire, VA Form 21-0960C-5. b. Headaches (Including Migraine Headaches), Disability Benefits Questionnaire, VA Form 21-0960C-8. c. Multiple Sclerosis (MS), Disability Benefits Questionnaire, VA Form 21...

  15. 76 FR 8846 - Proposed Information Collection (Disability Benefits Questionnaires-Group 1) Activity: Comment...

    Science.gov (United States)

    2011-02-15

    ... Collection (Disability Benefits Questionnaires--Group 1) Activity: Comment Request AGENCY: Veterans Benefits... Lymphatic Conditions, Including Leukemia Disability Benefits Questionnaire, VA Form 21-0960B-2. b. Amyotrophic Lateral Sclerosis (Lou Gehrig's Disease) Disability Benefits Questionnaire, VA Form 21-0960C-2. c...

  16. 76 FR 33417 - Agency Information Collection (Disability Benefits Questionnaires-Group 2) Activity Under OMB Review

    Science.gov (United States)

    2011-06-08

    ... Collection (Disability Benefits Questionnaires--Group 2) Activity Under OMB Review AGENCY: Veterans Benefits... Questionnaire, VA Form 21-0960A-2. b. Hypertension Disability Benefits Questionnaire, VA Form 21- 0960A-3. c. Non-ischemic Heart Disease (including Arrhythmias and Surgery, Disability Benefits Questionnaire, VA...

  17. Bill Gates' Great-Great-Granddaughter's Honeymoon: An Astronomy Activity for Several Different Age Groups

    Science.gov (United States)

    Fraknoi, Andrew

    2009-01-01

    When students finish a unit or course on the planets these days, they are often overwhelmed with facts, comparisons, and images. A good culminating activity, to help them organize their thinking (and review), is to have them divide into small groups (travel agencies) and come up with their top ten solar system "tourist sights" for future space…

  18. SOCIAL SERVICE USE GOOGLE-GROUPS INTO THE CURRICULUM AND EDUCATIONAL ACTIVITIES

    Directory of Open Access Journals (Sweden)

    T. Nosenko

    2010-06-01

    Full Text Available The article considers the use of Web2.0 services for organizing training activities high school teachers, formulated and analyzed the benefits of using social services issues in educational purposes. Determined that united in groups, students of pedagogical universities, thus preparing for the profession, enhancing professional knowledge.

  19. Coaching Paraprofessionals to Promote Engagement and Social Interactions during Small Group Activities

    Science.gov (United States)

    Ledford, Jennifer R.; Zimmerman, Kathleen N.; Chazin, Kate T.; Patel, Natasha M.; Morales, Vivian A.; Bennett, Brittany P.

    2017-01-01

    Paraprofessionals need adequate training and supports to assist young children with autism spectrum disorders to engage in appropriate social interactions during small group activities with their peers. In this study, we used in situ coaching and brief post-session feedback to improve the use of environmental arrangement, prompting, and praise by…

  20. Collaborative learning in higher education : design, implementation and evaluation of group learning activities

    NARCIS (Netherlands)

    Hei, de M.S.A.

    2016-01-01

    In higher education, group learning activities (GLAs) are frequently implemented in online, blended or face-to-face educational contexts. A major problem for the design and implementation of good quality GLAs that lead to the desired learning outcomes is that many approaches to GLAs have been

  1. Healthful Eating and Physical Activity in the Home Environment: Results from Multifamily Focus Groups

    Science.gov (United States)

    Berge, Jerica M.; Arikian, Aimee; Doherty, William J.; Neumark-Sztainer, Dianne

    2012-01-01

    Objective: To explore multiple family members' perceptions of risk and protective factors for healthful eating and physical activity in the home. Design: Ten multifamily focus groups were conducted with 26 families. Setting and Participants: Community setting with primarily black and white families. Family members (n = 103) were aged 8 to 61…

  2. Activation analysis for platinum in gold and metals of the platinum group through 199Au

    International Nuclear Information System (INIS)

    Foerster, H.

    1976-01-01

    Platinum was determined in gold and in metals of the platinum group through 199 Au by activation analysis. The matrix was separated at the end of irradiation before the daughter nuclide was formed. Gold was separated by extraction with MIBK from 1

  3. Annual activity report of Ignalina NPP Safety Analysis Group for 1995 year

    International Nuclear Information System (INIS)

    Ushpuras, E.; Augutis, J.; Bubelis, E.

    1995-01-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1995 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system. 18 refs., 9 tabs., 110 figs

  4. Annual activity report of Ignalina NPP Safety Analysis Group for 1994 year

    International Nuclear Information System (INIS)

    Ushpuras, E.; Kaliatka, A.; Chesna, B.; Dundulis, G.

    1995-01-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1994 are presented. ISAG is concentrated its research activities into 3 areas: the neutrons dynamics modeling, simulation of transient processes during loss of coolant accident and calculation of reactor building structure's streses and other mechanical properties in the case of accident. 6 refs., 13 tabs., 69 figs

  5. Annual activity report of Ignalina NPP Safety Analysis Group for the year 1997

    International Nuclear Information System (INIS)

    Ushpuras, E.; Augutis, J.; Bubelis, E.; Kaliatka, A

    1998-01-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for the year 1997 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system

  6. [Correlation Between Functional Groups and Radical Scavenging Activities of Acidic Polysaccharides from Dendrobium].

    Science.gov (United States)

    Liao, Ying; Yuan, Wen-yu; Zheng, Wen-ke; Luo, Ao-xue; Fan, Yi-jun

    2015-11-01

    To compare the radical scavenging activity of five different acidic polysaccharides, and to find the correlation with the functional groups. Alkali extraction method and Stepwise ethanol precipitation method were used to extract and concentrate the five Dendrobium polysaccharides, and to determine the contents of sulfuric acid and uronic acid of each kind of acidic polysaccharides, and the scavenging activity to ABTS+ radical and hydroxyl radical. Functional group structures were examined by FTIR Spectrometer. Five kinds of Dendrobium polysaccharides had different ability of scavenging ABTS+ free radical and hydroxyl free radical. Moreover, the study had shown that five kinds of antioxidant activity of acidic polysaccharides had obvious correlation withuronic acid and sulfuric acid. The antioxidant activity of each sample was positively correlated with the content of uronic acid, and negatively correlated with the content of sulfuric acid. Sulfuric acid can inhibit the antioxidant activity of acidic polysaccharide but uronic acid can enhance the free radical scavenging activity. By analyzing the structure characteristics of five acidic polysaccharides, all samples have similar structures, however, Dendrobium denneanum, Dendrobium devonianum and Dendrobium officinale which had β configuration have higher antioxidant activity than Dendrobium nobile and Dendrobium fimbriatum which had a configuration.

  7. A Small-Group Activity Introducing the Use and Interpretation of BLAST

    Directory of Open Access Journals (Sweden)

    Peter D. Newell

    2013-08-01

    Full Text Available As biological sequence data are generated at an ever increasing rate, the role of bioinformatics in biological research also grows. Students must be trained to complete and interpret bioinformatic searches to enable them to effectively utilize the trove of sequence data available. A key bioinformatic tool for sequence comparison and genome database searching is BLAST (Basic Local Alignment Search Tool. BLAST identifies sequences in a database that are similar to the entered query sequence, and ranks them based on the length and quality of the alignment. Our goal was to introduce sophomore and junior level undergraduate students to the basic functions and uses of BLAST with a small group activity lasting a single class period. The activity provides students an opportunity to perform a BLAST search, interpret the data output, and use the data to make inferences about bacterial cell envelope structure. The activity consists of two parts. Part 1 is a handout to be completed prior to class, complete with video tutorial, that reviews cell envelope structure, introduces key terms, and allows students to familiarize themselves with the mechanics of a BLAST search. Part 2 consists of a hands-on, web-based small group activity to be completed during the class period. Evaluation of the activity through student performance assessments suggests that students who complete the activity can better interpret the BLAST output parameters % query coverage and % max identity. While the topic of the activity is bacterial cell wall structure, it could be adapted to address other biological concepts.

  8. The Influence of Some Romanian Interest Groups Upon the Activity of Government and Parliament

    Directory of Open Access Journals (Sweden)

    Bianca COBÂRZAN

    2005-10-01

    Full Text Available The paper focuses on two specific interest groups, NGOs and trade unions, and on their influence upon the government and parliament. Our paper is based on an analyze of the activity of several interest groups during the period 2002-2004 and on the results of several researches and reports published on the last years. The analyze identifies petitioning for rule making, public meetings and debates, monitoring the activity of the public institutions and participating in advisory or regulatory committees as being the most common used mechanisms to influence the government and the parliament in Romania. Also, the analyze shows that administrative procedures affect the degree of bureaucratic autonomy. Overall, the results of this brief research show some pluralist forms of the interaction between the interest groups and the public institutions.

  9. Energy Cost Expression for a Youth Compendium of Physical Activities: Rationale for Using Age Groups.

    Science.gov (United States)

    Pfeiffer, Karin A; Watson, Kathleen B; McMurray, Robert G; Bassett, David R; Butte, Nancy F; Crouter, Scott E; Herrmann, Stephen D; Trost, Stewart G; Ainsworth, Barbara E; Fulton, Janet E; Berrigan, David

    2018-02-01

    This study compared the accuracy of physical activity energy expenditure (PAEE) prediction using 2 methods of accounting for age dependency versus 1 standard (single) value across all ages. PAEE estimates were derived by pooling data from 5 studies. Participants, 6-18 years (n = 929), engaged in 14 activities while in a room calorimeter or wearing a portable metabolic analyzer. Linear regression was used to estimate the measurement error in PAEE (expressed as youth metabolic equivalent) associated with using age groups (6-9, 10-12, 13-15, and 16-18 y) and age-in-years [each year of chronological age (eg, 12 = 12.0-12.99 y)] versus the standard (a single value across all ages). Age groups and age-in-years showed similar error, and both showed less error than the standard method for cycling, skilled, and moderate- to vigorous-intensity activities. For sedentary and light activities, the standard had similar error to the other 2 methods. Mean values for root mean square error ranged from 0.2 to 1.7 youth metabolic equivalent across all activities. Error reduction ranged from -0.2% to 21.7% for age groups and -0.23% to 18.2% for age-in-years compared with the standard. Accounting for age showed lower errors than a standard (single) value; using an age-dependent model in the Youth Compendium is recommended.

  10. Pre-Session Satiation as a Treatment for Stereotypy During Group Activities.

    Science.gov (United States)

    Rispoli, Mandy; Camargo, Síglia Hoher; Neely, Leslie; Gerow, Stephanie; Lang, Russell; Goodwyn, Fara; Ninci, Jennifer

    2014-05-01

    Individuals with developmental disabilities may engage in automatically reinforced behaviors that may interfere with learning opportunities. Manipulation of motivating operations has been shown to reduce automatically maintained behavior in some individuals. Considering behavioral indicators of satiation may assist in identifying the point at which an abolishing operation has begun to effect behavior. The purpose of this study was to evaluate the effects of pre-session satiation of automatic reinforcement on subsequent levels of stereotypy and activity engagement during group activities for three males ages 5 to 13 years with developmental disabilities. Following functional analyses with analogue conditions, an alternating treatment design compared a pre-session access to stereotypy condition with a no-pre-session access condition prior to group activity sessions. Results indicated that pre-session satiation of the putative reinforcer produced by stereotypy was effective in decreasing stereotypy and increasing activity engagement during subsequent group activities for all participants. These findings add to the literature supporting the effectiveness of abolishing operations to decrease automatically maintained stereotypy. © The Author(s) 2013.

  11. EDF. Group dynamics and activities. Competitive environment and strategic perspectives. Release - October 2017

    International Nuclear Information System (INIS)

    2017-10-01

    After a synthesis, this report proposes a presentation of the EDF Group (general overview, activities, human resources, share-holding structure, stock market data). It gives an overview of the EDF Group dynamics and of its activities: environment analysis (world electric power production, power consumption in France, regulated and spot prices, turnover in France and per area and market segment), performance analysis, and competitive analysis (comparison with the main European energy companies). It analyses the different development axes and discusses main events regarding the consolidation of nuclear activities, investments in renewable energies, withdrawal from coal and fuel, diversification in energy services, and financial consolidation. Financial data are presented along with the main economic and financial indicators. Important statistical data are provided

  12. “Conviv\\^{e}ncia” Groups: Building Active and Healthy Communities of Older Adults in Brazil

    Directory of Open Access Journals (Sweden)

    Tânia R. Bertoldo Benedetti

    2012-01-01

    Full Text Available In old age, social groups can be a crucial component for health and well-being. In 2009-2010, a follow-up survey was carried out in Florianópolis, Brazil to understand the impact of a variety of programs established since 2002 that were designed to enhance social activities among the older adult population. This study employed two surveys within the population of older adults in Florianópolis. The first survey interviewed a total of 875 older adults in 2002, and the second survey involved 1,705 older adults between 2009 and 2010. By 2010, many new programs were offered in the community and the enrollment of older adults in social programs followed similar trends. “Convivência” groups stood out as extremely popular social groups among this population. This paper discusses some of the potential outcomes associated with participation in “convivência” groups.

  13. Townes Group Activities from 1983-2000: Personal Recollections of William Danchi

    Science.gov (United States)

    Danchi, William C.

    2015-01-01

    I arrived in Berkeley in October 1983 as a post-doc, and my appointment was at the Space Sciences Laboratory (SSL). During that time the group was very large, with multiple activities led by Charlie himself and also by Senior Fellows such as John Lacy, Dan Jaffe, and Al Betz at the top of the hill at Space Sciences. Another significant contingent of the Townes group was housed in Birge Hall on campus, led by Reinhard Genzel when he was an Assistant Professor in the Physics Department. Although the group encompassed two separate locations, it functioned as one large group. Either we rode with Charlie up and down the hill, or (if we were concerned about our safety!) we took the bus.

  14. FRESH ACTIVITY IN OLD SYSTEMS: RADIO AGNs IN FOSSIL GROUPS OF GALAXIES

    International Nuclear Information System (INIS)

    Hess, Kelley M.; Wilcots, Eric M.; Hartwick, Victoria L.

    2012-01-01

    We present the first systematic 1.4 GHz Very Large Array radio continuum survey of fossil galaxy group candidates. These are virialized systems believed to have assembled over a gigayear in the past through the merging of galaxy group members into a single, isolated, massive elliptical galaxy and featuring an extended hot X-ray halo. We use new photometric and spectroscopic data from Sloan Digital Sky Survey Data Release 7 to determine that three of the candidates are clearly not fossil groups. Of the remaining 30 candidates, 67% contain a radio-loud (L 1.4GHz > 10 23 W Hz –1 ) active galactic nucleus (AGN) at the center of their dominant elliptical galaxy. We find a weak correlation between the radio luminosity of the AGN and the X-ray luminosity of the halo suggesting that the AGN contributes to energy deposition into the intragroup medium. We only find a correlation between the radio and optical luminosity of the central elliptical galaxy when we include X-ray-selected, elliptically dominated non-fossil groups, indicating a weak relationship between AGN strength and the mass assembly history of the groups. The dominant elliptical galaxy of fossil groups is on average roughly an order of magnitude more luminous than normal group elliptical galaxies in optical, X-ray, and radio luminosities and our findings are consistent with previous results that the radio-loud fraction in elliptical galaxies is linked to the stellar mass of a population. The current level of activity in fossil groups suggests that AGN fueling continues long after the last major merger. We discuss several possibilities for fueling the AGN at the present epoch.

  15. The value of psychosocial group activity in nursing education: A qualitative analysis.

    Science.gov (United States)

    Choi, Yun-Jung

    2018-05-01

    Nursing faculty often struggle to find effective teaching strategies for nursing students that integrate group work into nursing students' learning activities. This study was conducted to evaluate students' experiences in a psychiatric and mental health nursing course using psychosocial group activities to develop therapeutic communication and interpersonal relationship skills, as well as to introduce psychosocial nursing interventions. A qualitative research design was used. The study explored nursing students' experiences of the course in accordance with the inductive, interpretative, and constructive approaches via focus group interviews. Participants were 17 undergraduate nursing students who registered for a psychiatric and mental health nursing course. The collected data were analyzed by qualitative content analysis. The analysis resulted in 28 codes, 14 interpretive codes, 4 themes (developing interpersonal relationships, learning problem-solving skills, practicing cooperation and altruism, and getting insight and healing), and a core theme (interdependent growth in self-confidence). The psychosocial group activity provided constructive opportunities for the students to work independently and interdependently as healthcare team members through reflective learning experiences. Copyright © 2018 Elsevier Ltd. All rights reserved.

  16. Sustitución de la sabana nativa con plantaciones de Pinus caribaea (Pinaceae en Venezuela: efecto sobre parámetros indicadores de cambios en el carbono del suelo

    Directory of Open Access Journals (Sweden)

    Yrma Gómez

    2008-12-01

    Full Text Available Una gran extensión (615000 has de las sabanas nativas de los Llanos Orientales de Venezuela está siendo reemplazada por plantaciones de Pinus caribaea var. hondurensis; sin embargo, hasta ahora existe escasa información sobre el impacto de este manejo del suelo sobre los parámetros indicadores de la dinámica del carbono en el suelo. El objetivo de esta investigación fue determinar el efecto de la variabilidad temporal y la sustitución sobre el contenido de carbono orgánico total (COT, carbono hidrosoluble (CHS, carbono microbiano (Cmic, respiración basal (RB, cociente metabólico microbiano (qCO2 y la relación Cmic/Corg. Las propiedades químicas y parámetros biológicos seleccionados fueron determinados en plantaciones de P. caribaea de 3 y 29 años de edad y en una sabana nativa adyacente a estas plantaciones, la cual fue considerada como control. En cada sitio de muestreo recolectamos nueve muestras compuestas (0-10 cm de profundidad. Los parámetros estudiados no mostraron un patrón definido in relación a la variabilidad temporal. Hay mayor preservación del carbono dentro de la biomasa microbiana presente en suelos de Uverito en plantaciones de pinos. La tasa de respiración basal y el cociente metabólico indican que en estos suelos existe una comunidad microbiana poco activa, la cual es más eficiente en la utilización del carbono en las plantaciones de pino. La relación Cmic/Corg indica que en las plantaciones la biomasa microbiana constituye una importante reserva del carbono en el suelo. La sabana nativa a plantaciones de pino caribeño en estos suelos puede ser considerada un manejo efectivo para incrementar la calidad del suelo en los llanos orientales de Venezuela, siempre y cuando se tome en cuenta la importancia ecológica de las sabanas.Substitution of native savanna by Pinus caribaea (Pinaceae plantations in Venezuela: effect on parameters that indicated changes in soil carbon content. A great extension (615 000

  17. La amenaza sísmica de la Sabana de Bogotá frente a un sismo de magnitud M > 7.0, cuyo origen esté en el Piedemonte Llanero

    Directory of Open Access Journals (Sweden)

    German Chicangana

    2015-07-01

    Full Text Available En este trabajo se pasa a mostrar como un gran sismo originado en el Sistema de Fallas de la Falla Frontal de la Cordillera Oriental (SFFFCO puede producir grandes daños y pérdidas de vida tanto en el área metropolitana de Bogotá, como en el resto de la Sabana de Bogotá. El grado de la vulnerabilidad de Bogotá D.C. frente a un sismo cercano originado en el Piedemonte Llanero con una distancia inferior a 250 Km con una magnitud > 7.0, es muy alto teniendo presente que sus suelos de origen lagunar se ubican hacía el occidente y noroccidente, zonas que durante las dos últimas décadas se ha ido expansionado el área metropolitana.

  18. Somali women's view of physical activity--a focus group study.

    Science.gov (United States)

    Persson, Gerthi; Mahmud, Amina Jama; Hansson, Eva Ekvall; Strandberg, Eva Lena

    2014-10-23

    Physical inactivity presents a major public health challenge and is estimated to cause six to ten percent of the major non-communicable diseases. Studies show that immigrants, especially women, have an increased risk of non-communicable diseases compared to ethnic Swedes. Somali immigrant women have increased rates of overweight and obesity, low fitness levels and low levels of cardiorespiratory fitness compared to non-immigrant women. These findings suggest that Somali women are at increased risk of developing lifestyle-related diseases. Few studies explore determinants of physical activity among Somali women. The aim of this study was to explore Somali women's views and experiences of physical activity after migration to Sweden. A qualitative focused ethnographic approach was used in this study. Four focus groups were conducted with twenty-six Somali women ranging from 17 to 67 years of age. Focus group discussions were recorded, transcribed verbatim and analysed using qualitative content analysis. The analysis resulted in four main themes and ten categories: Life in Somalia and Life in Sweden, Understanding and enhancing health and Facilitators and barriers to physical activity. Great differences were seen between living in Somalia and in Sweden but also similarities such as finding time to manage housework, the family and the health of the woman. The extended family is non-existent in Sweden, making life more difficult. Health was considered a gift from God but living a healthy life was perceived as the responsibility of the individual. Misconceptions about enhancing health occurred depending on the woman's previous life experience and traditions. There was an awareness of the importance of physical activity among the participants but lack of knowledge of how to enhance activity on an individual basis. Enhancing factors to an active lifestyle were identified as being a safe and comfortable environment. Some barriers, such as climate, lack of motivation and time

  19. Sulfhydryl group content of chicken progesterone receptor: effect of oxidation on DNA binding activity

    International Nuclear Information System (INIS)

    Peleg, S.; Schrader, W.T.; O'Malley, B.W.

    1988-01-01

    DNA binding activity of chicken progesterone receptor B form (PRB) and A form (PRA) has been examined. This activity is strongly dependent upon the presence of thiols in the buffer. Stability studies showed that PRB was more sensitive to oxidation that was PRA. Receptor preparations were fractionated by DNA-cellulose chromatography to DNA-positive and DNA-negative subpopulations, and sulfhydryl groups were quantified on immunopurified receptor by labeling with [ 3 H]-N-ethylmaleimide. Labeling of DNA-negative receptors with [ 3 H]-N-ethylmaleimide showed 21-23 sulfhydryl groups on either PRA or PRB form when the proteins were reduced and denatured. A similar number was seen without reduction if denatured DNA-positive receptor species were tested. In contrast, the DNA-negative PRB had only 10-12 sulfhydryl groups detectable without reduction. A similar number (12-13 sulfhydryl groups) was found for PRA species that lost DNA binding activity after exposure to a nonreducing environment in vitro. The authors conclude that the naturally occurring receptor forms unable to bind to DNA, as well as receptor forms that have lost DNA binding activity due to exposure to nonreducing environment in vitro, contain 10-12 oxidized cysteine residues, likely present as disulfide bonds. Since they were unable to reduce the disulfide bonds when the native DNA-negative receptor proteins were treated with dithiothreitol (DTT), they speculate that irreversible loss of DNA binding activity of receptor in vitro is due to oxidation of cysteine residues that are not accessible to DTT in the native state

  20. Evaluation of the leishmanicidal activity of plants used by Peruvian Chayahuita ethnic group.

    Science.gov (United States)

    Estevez, Y; Castillo, D; Pisango, M Tangoa; Arevalo, J; Rojas, R; Alban, J; Deharo, E; Bourdy, G; Sauvain, M

    2007-11-01

    A total of 27 ethanolic plant extracts from 27 species were screened for leishmanicidal activity in vitro against Leishmania amazonensis. Most of the selected species (19) are traditionally used by the Chayahuitas, an Amazonian Peruvian ethnic group, to treat skin affections and/or leishmaniasis. A colorimetric method based on the reduction of tetrazolium salt (MTT) was used to measure the viability of Leishmania amazonensis promastigote and amastigote stages. Only the leaves of two species of the Piperaceae family (Piper hispidum Sw., and Piper strigosum Trel.) showed good leishmanicidal activities (IC(50)Cycadaceae) showed low activity against amastigote stage (IC(50) around 50 microg/ml). Of those only Tabernaemontana sananho displayed also good activity on promastigotes (IC(50)<10 microg/ml). Results are discussed herein, in relation with the traditional use of the plants and compared with other data from the relevant literature.

  1. The Method of Optimization of Hydropower Plant Performance for Use in Group Active Power Controller

    Directory of Open Access Journals (Sweden)

    Glazyrin G.V.

    2017-04-01

    Full Text Available The problem of optimization of hydropower plant performance is considered in this paper. A new method of calculation of optimal load-sharing is proposed. The method is based on application of incremental water flow curves representing relationship between the per unit increase of water flow and active power. The optimal load-sharing is obtained by solving the nonlinear equation governing the balance of total active power and the station power set point with the same specific increase of water flow for all turbines. Unlike traditional optimization techniques, the solution of the equation is obtained without taking into account unit safe operating zones. Instead, if calculated active power of a unit violates the permissible power range, load-sharing is recalculated for the remaining generating units. Thus, optimal load-sharing algorithm suitable for digital control systems is developed. The proposed algorithm is implemented in group active power controller in Novosibirsk hydropower plant. An analysis of operation of group active power controller proves that the application of the proposed method allows obtaining optimal load-sharing at each control step with sufficient precision.

  2. Antibacterial activity of berberine-NorA pump inhibitor hybrids with a methylene ether linking group.

    Science.gov (United States)

    Samosorn, Siritron; Tanwirat, Bongkot; Muhamad, Nussara; Casadei, Gabriele; Tomkiewicz, Danuta; Lewis, Kim; Suksamrarn, Apichart; Prammananan, Therdsak; Gornall, Karina C; Beck, Jennifer L; Bremner, John B

    2009-06-01

    Conjugation of the NorA substrate berberine and the NorA inhibitor 5-nitro-2-phenyl-1H-indole via a methylene ether linking group gave the 13-substituted berberine-NorA inhibitor hybrid, 3. A series of simpler arylmethyl ether hybrid structures were also synthesized. The hybrid 3 showed excellent antibacterial activity (MIC Staphylococcus aureus, 1.7 microM), which was over 382-fold more active than the parent antibacterial berberine, against this bacterium. This compound was also shown to block the NorA efflux pump in S. aureus.

  3. Group Cognitive Behavioural Therapy and Group Recreational Activity for Adults with Autism Spectrum Disorders: A Preliminary Randomized Controlled Trial

    Science.gov (United States)

    Hesselmark, Eva; Plenty, Stephanie; Bejerot, Susanne

    2014-01-01

    Although adults with autism spectrum disorder are an increasingly identified patient population, few treatment options are available. This "preliminary" randomized controlled open trial with a parallel design developed two group interventions for adults with autism spectrum disorders and intelligence within the normal range: cognitive…

  4. Physical Activity and Sedentary Behavior in an Ethnically Diverse Group of South African School Children

    Directory of Open Access Journals (Sweden)

    Joanne McVeigh, Rebecca Meiring

    2014-06-01

    Full Text Available Few studies have examined physical activity and inactivity levels in an urban South African setting across 12 years of formal schooling. This information is important for implementing strategies to curb increasing trends of physical inactivity and related negative consequences, especially in low to middle income countries facing multiple challenges on overburdened health care systems. We examined levels of physical activity and sedentary behaviour cross-sectionally over 12 school years from childhood to adolescence in Black, White and Indian boys and girls. The aim of our study was to describe gender and race related patterns of physical and sedentary activity levels in a sample of South African children and to determine whether there were associations between these variables and body mass status. Physical activity questionnaires, previously validated in a South African setting, were used to gather information about activity and sedentary behaviours among 767 Black, White and Indian children (5-18 years of age across the 12 grades of formal schooling. Body mass and height were also measured. Time spent in moderate-vigorous physical activity declined over the school years for all race groups and was consistently lower for girls than boys (p = 0.03, while time spent in sedentary activity increased with increasing grade (p 0.05 whereas time spent in sedentary activities was significantly and positively correlated with body mass across all race groups: Indian (r = 0.25, p < 0.001, White (r = 0.22, p < 0.001 and Black (r = 0.37, p = 0.001. The strength of the associations was similar for boys and girls. Black and Indian children were less physically active than their white peers (p < 0.05, and Black children also spent more time in sedentary activity (p < 0.05. Additionally, Black children had the highest proportion of overweight participants (30%, and Indian children the most number of underweight children (13%. Regardless of ethnicity, children who

  5. Antimony Complexes for Electrocatalysis: Activity of a Main-Group Element in Proton Reduction.

    Science.gov (United States)

    Jiang, Jianbing; Materna, Kelly L; Hedström, Svante; Yang, Ke R; Crabtree, Robert H; Batista, Victor S; Brudvig, Gary W

    2017-07-24

    Main-group complexes are shown to be viable electrocatalysts for the H 2 -evolution reaction (HER) from acid. A series of antimony porphyrins with varying axial ligands were synthesized for electrocatalysis applications. The proton-reduction catalytic properties of TPSb(OH) 2 (TP=5,10,15,20-tetra(p-tolyl)porphyrin) with two axial hydroxy ligands were studied in detail, demonstrating catalytic H 2 production. Experiments, in conjunction with quantum chemistry calculations, show that the catalytic cycle is driven via the redox activity of both the porphyrin ligand and the Sb center. This study brings insight into main group catalysis and the role of redox-active ligands during catalysis. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  6. Group behavioral activation for patients with severe obesity and binge eating disorder: a randomized controlled trial.

    Science.gov (United States)

    Alfonsson, Sven; Parling, Thomas; Ghaderi, Ata

    2015-03-01

    The aim of the present study was to assess whether behavioral activation (BA) is an efficacious treatment for decreasing eating disorder symptoms in patients with obesity and binge eating disorder (BED). Ninety-six patients with severe obesity and BED were randomized to either 10 sessions of group BA or wait-list control. The study was conducted at an obesity clinic in a regular hospital setting. The treatment improved some aspects of disordered eating and had a positive effect on depressive symptoms but there was no significant difference between the groups regarding binge eating and most other symptoms. Improved mood but lack of effect on binge eating suggests that dysfunctional eating (including BED) is maintained by other mechanisms than low activation and negative mood. However, future studies need to investigate whether effects of BA on binge eating might emerge later than at post-assessment, as in interpersonal psychotherapy for bulimia nervosa. © The Author(s) 2014.

  7. Barriers related to physical activity practice in adolescents. A focus-group study

    Directory of Open Access Journals (Sweden)

    Ciro Romélio Rodriguez Añez

    2010-04-01

    Full Text Available The aim of study was to identify barriers to physical activity in adolescents. Focus group interviews were conducted with subjects aged 15 to 18 years (n=59, 50.8% girls and divided according to gender. Content analysis was used to classify the reports into specific dimensions. Descriptive statistics employing relative and absolute frequencies of similar reports was performed using the SPSS 11.0 software. The most frequent barriers among adolescents were those associated with “psychological, cognitive and emotional” and “cultural and social” dimensions. For boys, the most frequently reported barriers were “feeling lazy”, “lack of company” and “lack of time”. For girls, “feeling lazy”, “lack of com-pany” and “occupation” were the most common barriers. In conclusion, the perception of barriers by adolescents varies according to gender, a fact requiring specific actions for the promotion of physical activity in this group.

  8. New Horizons in C-F Activation by Main Group Electrophiles

    Energy Technology Data Exchange (ETDEWEB)

    Ozerov, Oleg V. [Texas A & M Univ., College Station, TX (United States). Dept. of Chemistry

    2016-02-13

    This technical report describes progress on the DOE sponsored project "New Horizons in C-F Activation by Main Group Electrophiles" during the period of 09/15/2010 – 08/31/2015. The main goal of this project was to develop improved catalysts for conversion of carbon-fluorine bonds in potentially harmful compounds. The approach involved combining of a highly reactive positively charged main-group compound with a highly unreactive negatively charged species (anions) as a way to access potent catalysts for carbon-fluorine bond activation. This report details progress made in improving synthetic pathways to a variety of new anions with improved properties and analysis of their potential in catalysis.

  9. Modelling the exposure of wildlife to radiation: key findings and activities of IAEA working groups

    Energy Technology Data Exchange (ETDEWEB)

    Beresford, Nicholas A. [NERC Centre for Ecology and Hydrology, Lancaster Environment Center, Library Av., Bailrigg, Lancaster, LA1 4AP (United Kingdom); School of Environment and Life Sciences, University of Salford, Manchester, M4 4WT (United Kingdom); Vives i Batlle, Jordi; Vandenhove, Hildegarde [Belgian Nuclear Research Centre, Belgian Nuclear Research Centre, Boeretang 200, 2400 Mol (Belgium); Beaugelin-Seiller, Karine [Institut de Radioprotection et de Surete Nucleaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache (France); Johansen, Mathew P. [ANSTO Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Menai, NSW (Australia); Goulet, Richard [Canadian Nuclear Safety Commission, Environmental Risk Assessment Division, 280 Slater, Ottawa, K1A0H3 (Canada); Wood, Michael D. [School of Environment and Life Sciences, University of Salford, Manchester, M4 4WT (United Kingdom); Ruedig, Elizabeth [Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins (United States); Stark, Karolina; Bradshaw, Clare [Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-10691 (Sweden); Andersson, Pal [Swedish Radiation Safety Authority, SE-171 16, Stockholm (Sweden); Copplestone, David [Biological and Environmental Sciences, University of Stirling, Stirling, FK9 4LA (United Kingdom); Yankovich, Tamara L.; Fesenko, Sergey [International Atomic Energy Agency, Vienna International Centre, 1400, Vienna (Austria)

    2014-07-01

    In total, participants from 14 countries, representing 19 organisations, actively participated in the model application/inter-comparison activities of the IAEA's EMRAS II programme Biota Modelling Group. A range of models/approaches were used by participants (e.g. the ERICA Tool, RESRAD-BIOTA, the ICRP Framework). The agreed objectives of the group were: 'To improve Member State's capabilities for protection of the environment by comparing and validating models being used, or developed, for biota dose assessment (that may be used) as part of the regulatory process of licensing and compliance monitoring of authorised releases of radionuclides.' The activities of the group, the findings of which will be described, included: - An assessment of the predicted unweighted absorbed dose rates for 74 radionuclides estimated by 10 approaches for five of the ICRPs Reference Animal and Plant geometries assuming 1 Bq per unit organism or media. - Modelling the effect of heterogeneous distributions of radionuclides in sediment profiles on the estimated exposure of organisms. - Model prediction - field data comparisons for freshwater ecosystems in a uranium mining area and a number of wetland environments. - An evaluation of the application of available models to a scenario considering radioactive waste buried in shallow trenches. - Estimating the contribution of {sup 235}U to dose rates in freshwater environments. - Evaluation of the factors contributing to variation in modelling results. The work of the group continues within the framework of the IAEA's MODARIA programme, which was initiated in 2012. The work plan of the MODARIA working group has largely been defined by the findings of the previous EMRAS programme. On-going activities of the working group, which will be described, include the development of a database of dynamic parameters for wildlife dose assessment and exercises involving modelling the exposure of organisms in the marine coastal

  10. Comportamiento de la mastitis bovina y su impacto económico en algunos hatos de la Sabana de Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Germán Rodríguez Martínez

    2006-12-01

    Full Text Available Se describe la caracterización de la mastitis en diez hatos representativos de la Sabana de Bogotá, enfocándose al estudio del problema durante dos años de visitas bimensuales. Se realizaron diferentes tipos de pruebas de campo y de laboratorio: manejo del hato en general, registros de producción, California Mastitis Test (CMT, Cultivos bacteriológicos en medios Agar sangre, Agar Mac Conkey, Agar Sabouraud, recuento de células somáticas, en 644 vacas y 2576 cuartos con visitas bimensuales lo que arrojó un total de 7866 observaciones en vacas y 31464 observaciones en cuartos durante el estudio. Complementario al estudio se llevó a cabo un seguimiento semanal durante tres meses, en un grupo de 30 vacas en tres fincas con ordeño manual para determinar el efecto de la infección sobre la producción de leche por cuarto, mediante la utilización de un balde ideado por el autor. Los resultados sugieren un mayor efecto de la infección en hatos con ordeño mecánico donde se encontró un 61,2% de infección en vacas y un 30% de infección subclínica por cuartos y un 4,7 % de cuartos con mastitis clínica. En ordeño manual la infección fue de 48% en vacas, 23,6% en cuartos y 3,6% de casos de cuartos con mastitis clínica. Se encontró una correlación del 91 % entre el CMT y el recuento de células somáticas lo que concuerda con los resultados de otros investigadores. En relación a los diferentes microorganismos aislados, se encontró como dominante el Streptococcus agalactiae en ordeño manual y Staphylococcus aureus en ordeño mecánico y se descartó la posibilidad de encontrar microorganismos coliformes como causales de mastitis durante el estudio. Referente al efecto de la infección sobre la producción se registraron pérdidas hasta de cinco litros diarios por vaca afectada tomando como indicador el CMT y el pesaje de la leche. También se pudo definir una disminución de la producción por cuarto de: 0,42; 0,90; 1,47; y 2

  11. Control of Surface Functional Groups on Pertechnetate Sorption on Activated Carbon

    International Nuclear Information System (INIS)

    Y. Wang; H. Gao; R. Yeredla; H. Xu; M. Abrecht; G.D. Stasio

    2006-01-01

    99 Tc is highly soluble and poorly adsorbed by natural materials under oxidizing conditions, thus being of particular concern for radioactive waste disposal. Activated carbon can potentially be used as an adsorbent for removing Tc from aqueous solutions. We have tested six commercial activated carbon materials for their capabilities for sorption of pertechnetate (TcO 4 - ). The tested materials can be grouped into two distinct types: Type I materials have high sorption capabilities with the distribution coefficients (K d ) varying from 9.5 x 10 5 to 3.2 x 10 3 mL/g as the pH changes from 4.5 to 9.5, whereas type II materials have relatively low sorption capabilities with K d remaining more or less constant (1.1 x 10 3 - 1.8 x 10 3 mL/g) over a similar pH range. The difference in sorption behavior between the two types of materials is attributed to the distribution of surface functional groups. The predominant surface groups are identified to be carboxylic and phenolic groups. The carboxylic group can be further divided into three subgroups A, B, and C in the order of increasing acidity. The high sorption capabilities of type I materials are found to be caused by the presence of a large fraction of carboxylic subgroups A and B, while the low sorption capabilities of type II materials are due to the exclusive presence of phenolic and carboxylic subgroup C. Therefore, the performance of activated carbon for removing TcO 4 - can be improved by enhancing the formation of carboxylic subgroups A and B during material processing

  12. Moms in motion: a group-mediated cognitive-behavioral physical activity intervention

    Directory of Open Access Journals (Sweden)

    Brawley Lawrence R

    2006-08-01

    Full Text Available Abstract Background When examining the prevalence of physical inactivity by gender and age, women over the age of 25 are at an increased risk for sedentary behavior. Childbearing and motherhood have been explored as one possible explanation for this increased risk. Post natal exercise studies to date demonstrate promising physical and psychological outcomes, however few physical activity interventions have been theory-driven and tailored to post natal exercise initiates. The purpose of this study was to compare the effects of a group-mediated cognitive behavioral intervention based upon social-cognitive theory and group dynamics (GMCB to a standard care postnatal exercise program (SE. Method A randomized, two-arm intervention design was used. Fifty-seven post natal women were randomized to one of two conditions: (1 a standard exercise treatment (SE and (2 a standard exercise treatment plus group-mediated cognitive behavioral intervention (GMCB. Participants in both conditions participated in a four-week intensive phase where participants received standard exercise training. In addition, GMCB participants received self-regulatory behavioral skills training via six group-mediated counseling sessions. Following the intensive phase, participants engaged in a four-week home-based phase of self-structured exercise. Measures of physical activity, barrier efficacy, and proximal outcome expectations were administered and data were analyzed using ANCOVA procedures. Results and discussion ANCOVA of change scores for frequency, minutes, and volume of physical activity revealed significant treatment effects over the intensive and home-based phases (p's Conclusion While both exercise programs resulted in improvements to exercise participation, the GMCB intervention produced greater improvement in overall physical activity, barrier efficacy and proximal outcome expectations.

  13. The 1986-1989 activity report of the Radiochemistry Group of the Orsay IPN

    International Nuclear Information System (INIS)

    Guillaumont, R.

    1989-01-01

    The 1986-1989 activity report of the Radiochemistry Group of the Nuclear Physics Institute (at Orsay), is presented. The research fields purposes and evolution are summarized. The following topics are presented: synthesis and study of pure or doped thorium compounds, high resolution spectroscopy, thermodynamics/kinetics in aqueous solutions, 6d elements, investigations on Ta, Kd, U, UO2 and cold fusion. The presentation of the research team, administrative aspects, publications, conferences and future research programs are also included [fr

  14. Annual activity report of Ignalina NPP Safety Analysis Group for 1996 year

    International Nuclear Information System (INIS)

    Ushpuras, E.; Augutis, J.; Bubelis, E.

    1997-03-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1996 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system. Ignalina Safety Analysis Report was prepared on the basis of these results. 37 refs., 9 tabs., 96 figs

  15. Adsorption of volatile sulphur compounds onto modified activated carbons: Effect of oxygen functional groups

    International Nuclear Information System (INIS)

    Vega, Esther; Lemus, Jesús; Anfruns, Alba; Gonzalez-Olmos, Rafael; Palomar, José; Martin, María J.

    2013-01-01

    Highlights: • HNO 3 oxidation incorporates a higher amount of functionalities than O 3 oxidation. • The loss of porosity is compensated by the massive incorporation of oxygen groups. • HNO 3 oxidation increases OH groups in AC and the ETM and DMS adsorption capacities. • The oxygen functional groups in the AC surface did not affect the DMDS adsorption. • COSMO-RS predicts the important role of OH groups for VSC adsorption. -- Abstract: The effect of physical and chemical properties of activated carbon (AC) on the adsorption of ethyl mercaptan, dimethyl sulphide and dimethyl disulphide was investigated by treating a commercial AC with nitric acid and ozone. The chemical properties of ACs were characterised by temperature programme desorption and X-ray photoelectron spectroscopy. AC treated with nitric acid presented a larger amount of oxygen functional groups than materials oxidised with ozone. This enrichment allowed a significant improvement on adsorption capacities for ethyl mercaptan and dimethyl sulphide but not for dimethyl disulphide. In order to gain a deeper knowledge on the effect of the surface chemistry of AC on the adsorption of volatile sulphur compounds, the quantum-chemical COSMO-RS method was used to simulate the interactions between AC surface groups and the studied volatile sulphur compounds. In agreement with experimental data, this model predicted a greater affinity of dimethyl disulphide towards AC, unaffected by the incorporation of oxygen functional groups in the surface. Moreover, the model pointed out to an increase of the adsorption capacity of AC by the incorporation of hydroxyl functional groups in the case of ethyl mercaptan and dimethyl sulphide due to the hydrogen bond interactions

  16. Adsorption of volatile sulphur compounds onto modified activated carbons: Effect of oxygen functional groups

    Energy Technology Data Exchange (ETDEWEB)

    Vega, Esther, E-mail: esther@lequia.udg.cat [LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Girona, Catalonia E-17071 (Spain); Lemus, Jesús [Universidad de Madrid, Sección de Ingeniería Química, Cantoblanco, Madrid E-28049 (Spain); Anfruns, Alba; Gonzalez-Olmos, Rafael [LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Girona, Catalonia E-17071 (Spain); Palomar, José [Universidad de Madrid, Sección de Ingeniería Química, Cantoblanco, Madrid E-28049 (Spain); Martin, María J. [LEQUIA, Institute of the Environment, University of Girona, Campus Montilivi, Girona, Catalonia E-17071 (Spain)

    2013-08-15

    Highlights: • HNO{sub 3} oxidation incorporates a higher amount of functionalities than O{sub 3} oxidation. • The loss of porosity is compensated by the massive incorporation of oxygen groups. • HNO{sub 3} oxidation increases OH groups in AC and the ETM and DMS adsorption capacities. • The oxygen functional groups in the AC surface did not affect the DMDS adsorption. • COSMO-RS predicts the important role of OH groups for VSC adsorption. -- Abstract: The effect of physical and chemical properties of activated carbon (AC) on the adsorption of ethyl mercaptan, dimethyl sulphide and dimethyl disulphide was investigated by treating a commercial AC with nitric acid and ozone. The chemical properties of ACs were characterised by temperature programme desorption and X-ray photoelectron spectroscopy. AC treated with nitric acid presented a larger amount of oxygen functional groups than materials oxidised with ozone. This enrichment allowed a significant improvement on adsorption capacities for ethyl mercaptan and dimethyl sulphide but not for dimethyl disulphide. In order to gain a deeper knowledge on the effect of the surface chemistry of AC on the adsorption of volatile sulphur compounds, the quantum-chemical COSMO-RS method was used to simulate the interactions between AC surface groups and the studied volatile sulphur compounds. In agreement with experimental data, this model predicted a greater affinity of dimethyl disulphide towards AC, unaffected by the incorporation of oxygen functional groups in the surface. Moreover, the model pointed out to an increase of the adsorption capacity of AC by the incorporation of hydroxyl functional groups in the case of ethyl mercaptan and dimethyl sulphide due to the hydrogen bond interactions.

  17. Engie. Group dynamics and activities. Competitive environment and strategic perspectives. Release - October 2017

    International Nuclear Information System (INIS)

    2017-09-01

    After a synthesis, this report proposes a presentation of the Engie Group (general overview, activities in the different parts of the world, evolution of human resources, share-holding structure, stock market data, high management, competitive environment). It gives an overview of the Engie group dynamics and of its activities through a presentation of an environment analysis (world energy market, European gas and electricity market, gas consumption in France, regulated tariffs and spot prices, temperatures in France, regulatory evolutions), a presentation of the group activity (turnover in France, gas and electricity sales, turnover per area and market segment), a performance analysis (operating income), and a competitive analysis (comparison with the main European energy companies). It analyses the different development axes and discusses main events regarding Engie's strategy, the implementation of a large asset disposal, how Engie gets on the path of renewable energies, and the development of energy services. Financial data are presented along with the main economic and financial indicators. Important statistical data are provided

  18. Assessing Activity and Location of Individual Laying Hens in Large Groups Using Modern Technology

    Directory of Open Access Journals (Sweden)

    Janice M. Siegford

    2016-02-01

    Full Text Available Tracking individual animals within large groups is increasingly possible, offering an exciting opportunity to researchers. Whereas previously only relatively indistinguishable groups of individual animals could be observed and combined into pen level data, we can now focus on individual actors within these large groups and track their activities across time and space with minimal intervention and disturbance. The development is particularly relevant to the poultry industry as, due to a shift away from battery cages, flock sizes are increasingly becoming larger and environments more complex. Many efforts have been made to track individual bird behavior and activity in large groups using a variety of methodologies with variable success. Of the technologies in use, each has associated benefits and detriments, which can make the approach more or less suitable for certain environments and experiments. Within this article, we have divided several tracking systems that are currently available into two major categories (radio frequency identification and radio signal strength and review the strengths and weaknesses of each, as well as environments or conditions for which they may be most suitable. We also describe related topics including types of analysis for the data and concerns with selecting focal birds.

  19. Assessing Activity and Location of Individual Laying Hens in Large Groups Using Modern Technology.

    Science.gov (United States)

    Siegford, Janice M; Berezowski, John; Biswas, Subir K; Daigle, Courtney L; Gebhardt-Henrich, Sabine G; Hernandez, Carlos E; Thurner, Stefan; Toscano, Michael J

    2016-02-02

    Tracking individual animals within large groups is increasingly possible, offering an exciting opportunity to researchers. Whereas previously only relatively indistinguishable groups of individual animals could be observed and combined into pen level data, we can now focus on individual actors within these large groups and track their activities across time and space with minimal intervention and disturbance. The development is particularly relevant to the poultry industry as, due to a shift away from battery cages, flock sizes are increasingly becoming larger and environments more complex. Many efforts have been made to track individual bird behavior and activity in large groups using a variety of methodologies with variable success. Of the technologies in use, each has associated benefits and detriments, which can make the approach more or less suitable for certain environments and experiments. Within this article, we have divided several tracking systems that are currently available into two major categories (radio frequency identification and radio signal strength) and review the strengths and weaknesses of each, as well as environments or conditions for which they may be most suitable. We also describe related topics including types of analysis for the data and concerns with selecting focal birds.

  20. Interaction of 1-iodochlordecone, as radioactive tracer, with the carboxylate group on activated carbon

    International Nuclear Information System (INIS)

    Gamboa-Carballo, Juan José; Melchor-Rodríguez, Kenia; Hernández-Valdés, Daniel; Jáuregui-Haza, Ulises Javier

    2016-01-01

    Chlordecone is a synthetic organo chlorinated compound that has been used as pesticide. It has been identified and listed as persistent organic pollutant by the Stockholm Convention. The use of activated carbon filters is one of the most widely popular solutions for water decontamination. The chlordecone labeled with radioactive iodine (1-iodochordecone) is a potential radioactive tracer for studying adsorption, environmental availability and bio-distribution of chlordecone. The selection of the best suited activation carbon for this type of contaminants is mainly an empiric process, increasing the costs of research. A simplified activation carbon model, consisting of a seven ring graphene sheet with a functional group (carboxylate) was used to assess the interaction of chlordecone and 1-iodochlordecone with this surface group under neutral pH conditions over the adsorption process. The Multiple Minima Hypersurface methodology with the semiempirical Hamiltonian PM7 was used. The results indicate that for carboxylate, in neutral conditions, significant associations appear which suggest chemisorption in activated carbon. No significant differences were observed for the interactions of chlordecone and 1 iodochlordecone with carboxylate, making 1-iodochlordecone a good candidate as a radioactive tracer in medical research. (author)

  1. Correlation of group C meningococcal conjugate vaccine response with B- and T-lymphocyte activity.

    Directory of Open Access Journals (Sweden)

    James B Wing

    Full Text Available Despite the success of conjugate vaccination against meningococcal group C (MenC disease, post-vaccination, some individuals still exhibit rapid waning of initially protective bactericidal antibody levels. The mechanism of this relative loss of humoral protection remains undetermined. In this report we have investigated the relationship between T- and B-cell activation and co-stimulation and the loss of protective antibody titers. We have found that healthy volunteers who lose protective MenC antibody levels one year after receipt of glycoconjugate vaccine exhibit no detectable cellular defect in polyclonal B- or T-cell activation, proliferation or the B-memory pool. This suggests that the processes underlying the more rapid loss of antibody levels are independent of defects in either initial T- or B-cell activation.

  2. Design, synthesis, and antifungal activities of novel triazole derivatives containing the benzyl group

    Directory of Open Access Journals (Sweden)

    Xu K

    2015-03-01

    Full Text Available Kehan Xu,1,* Lei Huang,1,* Zheng Xu,2 Yanwei Wang,1,3 Guojing Bai,1 Qiuye Wu,1 Xiaoyan Wang,1 Shichong Yu,1 Yuanying Jiang1 1School of Pharmacy, Second Military Medical University, Shanghai, 2Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, 3Number 422 Hospital of PLA, Zhanjiang, People’s Republic of China *These authors contributed equally to this work Abstract: In previous studies undertaken by our group, a series of 1-(1H-1,2,4-triazole-1-yl-2-(2,4-difluorophenyl-3-substituted-2-propanols (1a–r, which were analogs of fluconazole, was designed and synthesized by click chemistry. In the study reported here, the in vitro antifungal activities of all the target compounds were evaluated against eight human pathogenic fungi. Compounds 1a, 1q, and 1r showed the more antifungal activity than the others. Keywords: triazole, synthesis, antifungal activity, CYP51

  3. Low back pain in female elite football and handball players compared with an active control group.

    Science.gov (United States)

    Tunås, Paula; Nilstad, Agnethe; Myklebust, Grethe

    2015-09-01

    The purpose of this cross-sectional study was to compare the prevalence of low back pain (LBP) among female elite football and handball players to a matched non-professional active control group. The participants were requested to answer a questionnaire based on standardized Nordic questionnaires for musculoskeletal symptoms to assess the prevalence of LBP. Included participants were elite female football (n = 277) and handball players (n = 190), and a randomly selected control group from the Norwegian population (n = 167). Fifty-seven percentage of the football players, 59 % of the handball players and 60 % of the control group had experienced LBP the previous year. There were no significant group differences in the prevalence of LBP ever (p = 0.62), the previous year (p = 0.85) or the previous 7 days (p = 0.63). For both sports, there was a significant increase in prevalence of LBP from the resting period to the competitive periods of the season (p ≤ 0.001). Seventy percent of the goalkeepers in both football and handball had experienced LBP the previous year. There were no difference in LBP among female elite football and handball players compared with the control group. However, female elite athletes in football and handball reported a high prevalence of LBP compared to previous studies. The variations in LBP and playing positions indicate that specific field positions, in football and handball, is a risk factor for developing LBP.

  4. Lysis of typhus-group rickettsia-infected targets by lymphokine activated killers

    International Nuclear Information System (INIS)

    Carl, M.; Dasch, G.A.

    1986-01-01

    The authors recently described a subset of OKT8, OKT3-positive lymphocytes from typhus-group rickettsia immune individuals which were capable of lysing autologous PHA-blasts or Epstein-Barr virus transformed B cells (LCL) infected with typhus-group rickettsiae. In order to determine if killing by these effectors was HLA-restricted, they stimulated peripheral blood mononuclear cells (PBMC) from typhus-group rickettsia immune individuals in vitro with typhus-group rickettsia-derived antigen for one week and then measured lysis of autologous LCL or HLA-mismatched LCL in a 4-6 hour Cr 51 -release assay. There was significant lysis of both the autologous and the HLA-mismatched infected targets as compared to the corresponding uninfected targets. Since this suggested that the effectors were lymphokine activated killers (LAK) rather than cytotoxic T lymphocytes, they then tested this hypothesis by stimulating PBMC from both immune and non-immune individuals in vitro for one week with purified interleukin 2 and measuring lysis of infected, autologous LCL. PBMC thus treated, from both immune and non-immune individuals, were capable of significantly lysing autologous, infected LCL as compared to the non-infected control. They therefore conclude that targets infected with typhus-group rickettsiae are susceptible to lysis to LAK

  5. Activities in a social networking-based discussion group by endoscopic retrograde cholangiopancreatography doctors.

    Science.gov (United States)

    Kang, Xiaoyu; Zhao, Lina; Liu, Na; Wang, Xiangping; Zhang, Rongchun; Liu, Zhiguo; Liang, Shuhui; Yao, Shaowei; Tao, Qin; Jia, Hui; Pan, Yanglin; Guo, Xuegang

    2017-10-01

    Online social networking is increasingly being used among medical practitioners. However, few studies have evaluated its use in therapeutic endoscopy. Here, we aimed to analyze the shared topics and activities of a group of endoscopic retrograde cholangiopancreatography (ERCP) doctors in a social networking-based endoscopic retrograde cholangiopancreatography discussion group (EDG). Six ERCP trainers working in Xijing Hospital and 48 graduated endoscopists who had finished ERCP training in the same hospital were invited to join in EDG. All group members were informed not to divulge any private information of patients when using EDG. The activities of group members on EDG were retrospectively extracted. The individual data of the graduated endoscopists were collected by a questionnaire. From June 2014 to May 2015, 6924 messages were posted on EDG, half of which were ERCP related. In total, 214 ERCP-related topics were shared, which could be categorized into three types: sharing experience/cases (52.3%), asking questions (38.3%), and sharing literatures/advances (9.3%). Among the 48 graduated endoscopists, 21 had a low case volume of less than 50 per year and 27 had a high volume case volume of 50 or more. High-volume graduated endoscopists posted more ERCP-related messages (P=0.008) and shared more discussion topics (P=0.003) compared with low-volume graduated endoscopists. A survey showed that EDG was useful for graduated endoscopists in ERCP performance and management of post-ERCP complications, etc. A wide range of ERCP-related topics were shared on the social networking-based EDG. The ERCP-related behaviors on EDG were more active in graduated endoscopists with an ERCP case volume of more than 50 per year.

  6. Generation of 3D templates of active sites of proteins with rigid prosthetic groups.

    Science.gov (United States)

    Nebel, Jean-Christophe

    2006-05-15

    With the increasing availability of protein structures, the generation of biologically meaningful 3D patterns from the simultaneous alignment of several protein structures is an exciting prospect: active sites could be better understood, protein functions and protein 3D structures could be predicted more accurately. Although patterns can already be generated at the fold and topological levels, no system produces high-resolution 3D patterns including atom and cavity positions. To address this challenge, our research focuses on generating patterns from proteins with rigid prosthetic groups. Since these groups are key elements of protein active sites, the generated 3D patterns are expected to be biologically meaningful. In this paper, we present a new approach which allows the generation of 3D patterns from proteins with rigid prosthetic groups. Using 237 protein chains representing proteins containing porphyrin rings, our method was validated by comparing 3D templates generated from homologues with the 3D structure of the proteins they model. Atom positions were predicted reliably: 93% of them had an accuracy of 1.00 A or less. Moreover, similar results were obtained regarding chemical group and cavity positions. Results also suggested our system could contribute to the validation of 3D protein models. Finally, a 3D template was generated for the active site of human cytochrome P450 CYP17, the 3D structure of which is unknown. Its analysis showed that it is biologically meaningful: our method detected the main patterns of the cytochrome P450 superfamily and the motifs linked to catalytic reactions. The 3D template also suggested the position of a residue, which could be involved in a hydrogen bond with CYP17 substrates and the shape and location of a cavity. Comparisons with independently generated 3D models comforted these hypotheses. Alignment software (Nestor3D) is available at http://www.kingston.ac.uk/~ku33185/Nestor3D.html

  7. Multi-group transport methods for high-resolution neutron activation analysis

    International Nuclear Information System (INIS)

    Burns, K. A.; Smith, L. E.; Gesh, C. J.; Shaver, M. W.

    2009-01-01

    The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. In these applications, high-resolution gamma-ray spectrometers are used to preserve as much information as possible about the emitted photon flux, which consists of both continuum and characteristic gamma rays with discrete energies. Monte Carlo transport is the most commonly used modeling tool for this type of problem, but computational times for many problems can be prohibitive. This work explores the use of multi-group deterministic methods for the simulation of neutron activation problems. Central to this work is the development of a method for generating multi-group neutron-photon cross-sections in a way that separates the discrete and continuum photon emissions so that the key signatures in neutron activation analysis (i.e., the characteristic line energies) are preserved. The mechanics of the cross-section preparation method are described and contrasted with standard neutron-gamma cross-section sets. These custom cross-sections are then applied to several benchmark problems. Multi-group results for neutron and photon flux are compared to MCNP results. Finally, calculated responses of high-resolution spectrometers are compared. Preliminary findings show promising results when compared to MCNP. A detailed discussion of the potential benefits and shortcomings of the multi-group-based approach, in terms of accuracy, and computational efficiency, is provided. (authors)

  8. Factors affecting walking activity of older people from culturally diverse groups: an Australian experience.

    Science.gov (United States)

    Bird, Stephen R; Radermacher, Harriet; Sims, Jane; Feldman, Susan; Browning, Colette; Thomas, Shane

    2010-07-01

    This study sought to investigate the walking habits of older people from diverse cultural backgrounds, and to identify the factors associated with their walking. Three hundred and thirty three people over the age of 60 years were recruited from seven culturally diverse groups from the Western suburbs of Melbourne, Australia. A survey questionnaire recording physical activity, and various factors related to activity, was interviewer-administered in the participants' preferred language. Data were analysed using Kruskal-Wallis, chi(2) and Mann-Whitney tests. Forty-seven percent of the participants walked at least 150 min per week, with no significant difference in prevalence between genders or cultural groups. Some cultural differences were found in relation to reasons and locations for walking, and women were more likely than men to report walking in the shopping mall, whilst men were more likely than women to report walking in the park and along walking trails. Those who attained >150 min of walking were more likely to report health and fitness as reasons for walking, to perceive their walking environment as more pleasurable, to use walking trails, and to consider their environment safe and to facilitate social interaction. This study indicates that the continued advocating of walking as a health promoting activity should be central to future campaigns to increase physical activity in this age group. The provision of locations that are accessible, safe, aesthetically pleasing, and encourage social engagement are likely to facilitate older people's participation in walking. For maximum effectiveness, however, strategies may benefit from being tailored to meet specific gender and cultural preferences. Copyright 2009 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

  9. Qualitative Evaluation of a Physical Activity Health Promotion Programme for People with Intellectual Disabilities in a Group Home Setting

    Science.gov (United States)

    Dixon-Ibarra, A.; Driver, S.; Nery-Hurwit, M.; VanVolkenburg, H.

    2018-01-01

    Background: There is a lack of health promotion programming designed to change the physical activity environment of the group home setting. The Menu-Choice programme assists staff in creating physical activity goals alongside residents with intellectual disabilities and provides strategies to incorporate activity into the group home schedule. The…

  10. Increasing Physical Activity in Mothers Using Video Exercise Groups and Exercise Mobile Apps: Randomized Controlled Trial.

    Science.gov (United States)

    Mascarenhas, Maya Nina; Chan, June Maylin; Vittinghoff, Eric; Van Blarigan, Erin Lynn; Hecht, Frederick

    2018-05-18

    Women significantly decrease their activity levels in the transition to motherhood. Digital health technologies are low cost, scalable, and can provide an effective delivery mechanism for behavior change. This is the first study that examines the use of videoconferencing and mobile apps to create exercise groups for mothers. The aim of the study was to test the feasibility, acceptability, and effectiveness of an individually adaptive and socially supportive physical activity intervention incorporating videoconferencing and mobile apps for mothers. The Moms Online Video Exercise Study was an 8-week, 2-armed, Web-based randomized trial comparing the effectiveness of a group exercise intervention with a waitlist control. Healthy mothers with at least 1 child under the age of 12 years were recruited through Facebook and email listservs. Intervention participants joined exercise groups using videoconferencing (Google Hangouts) every morning on weekdays and exercised together in real time, guided by exercise mobile apps (eg, Nike+, Sworkit) of their choice. Waitlist control participants had access to recommended mobile apps and an invitation to join an exercise group after the 8-week study period. Main outcomes assessed included changes in self-reported moderate, vigorous, and moderate to vigorous physical activity (MVPA) minutes per week in aggregate and stratified by whether women met Centers for Disease Control and Prevention guidelines for sufficient aerobic activity at baseline. Outcomes were measured through self-assessed Web-based questionnaires at baseline and 8 weeks. The intervention was effective at increasing exercise for inactive women and proved to be feasible and acceptable to all participants. A total of 64 women were randomized, 30 to intervention and 34 to control. Women attended 2.8 sessions per week. There was a strong, but not statistically significant, trend toward increasing moderate, vigorous, and MVPA minutes for all women. As hypothesized, in

  11. Assessing the reliability of predictive activity coefficient models for molecules consisting of several functional groups

    Directory of Open Access Journals (Sweden)

    R. P. Gerber

    2013-03-01

    Full Text Available Currently, the most successful predictive models for activity coefficients are those based on functional groups such as UNIFAC. In contrast, these models require a large amount of experimental data for the determination of their parameter matrix. A more recent alternative is the models based on COSMO, for which only a small set of universal parameters must be calibrated. In this work, a recalibrated COSMO-SAC model was compared with the UNIFAC (Do model employing experimental infinite dilution activity coefficient data for 2236 non-hydrogen-bonding binary mixtures at different temperatures. As expected, UNIFAC (Do presented better overall performance, with a mean absolute error of 0.12 ln-units against 0.22 for our COSMO-SAC implementation. However, in cases involving molecules with several functional groups or when functional groups appear in an unusual way, the deviation for UNIFAC was 0.44 as opposed to 0.20 for COSMO-SAC. These results show that COSMO-SAC provides more reliable predictions for multi-functional or more complex molecules, reaffirming its future prospects.

  12. Galaxy And Mass Assembly (GAMA): the effect of galaxy group environment on active galactic nuclei

    Science.gov (United States)

    Gordon, Yjan A.; Pimbblet, Kevin A.; Owers, Matt S.; Bland-Hawthorn, Joss; Brough, Sarah; Brown, Michael J. I.; Cluver, Michelle E.; Croom, Scott M.; Holwerda, Benne W.; Loveday, Jonathan; Mahajan, Smriti; Wang, Lingyu

    2018-04-01

    In galaxy clusters, efficiently accreting active galactic nuclei (AGNs) are preferentially located in the infall regions of the cluster projected phase-space, and are rarely found in the cluster core. This has been attributed to both an increase in triggering opportunities for infalling galaxies, and a reduction of those mechanisms in the hot, virialized, cluster core. Exploiting the depth and completeness (98 per cent at r 9.9 in 695 groups with 11.53 ≤ log10(M200/M⊙) ≤ 14.56 at z 13.5, AGNs are preferentially found in the infalling galaxy population with 3.6σ confidence. At lower halo masses, we observe no difference in AGN fraction between core and infalling galaxies. These observations support a model where a reduced number of low-speed interactions, ram pressure stripping and intra-group/cluster medium temperature, the dominance of which increase with halo mass, work to inhibit AGN in the cores of groups and clusters with log10(M200/M⊙) > 13.5, but do not significantly affect nuclear activity in cores of less massive structures.

  13. [Nursing activities in family medicine groups for patients with chronic pain].

    Science.gov (United States)

    Bergeron, Dave A; Bourgault, Patricia; Gallagher, Frances

    2015-01-01

    Thousands of people treated in primary care are currently experiencing chronic pain (CP), for which management is often inadequate. In Quebec, nurses in family medicine groups (FMGs) play a key role in the management of chronic health problems. The present study aimed to describe the activities performed by FMG nurses in relation to CP management and to describe barriers to those activities. A descriptive correlational cross-sectional postal survey was used. The accessible population includes FMG nurses on the Ordre des infirmières et infirmiers du Québec list. All nurses on the list who provided consent to be contacted at home for research purposes were contacted. A self-administered postal questionnaire (Pain Management Activities Questionnaire) was completed by 53 FMG nurses. Three activities most often performed by nurses were to establish a therapeutic relationship with the client; discuss the effectiveness of therapeutic measures with the physician; and conduct personalized teaching for the patient. The average number of individuals seen by interviewed nurses that they believe suffer from CP was 2.68 per week. The lack of knowledge of possible interventions in pain management (71.7%) and the nonavailability of information on pain management (52.8%) are the main barriers perceived by FMG nurses. FMG nurses are currently performing few activities in CP management. The nonrecognition of CP may explain this situation.

  14. Quality assurance activities by the companies in the Mitsubishi group for nuclear power plants in Japan

    International Nuclear Information System (INIS)

    Fujiwara, K.; Moriyama, A.; Okabe, K.

    1982-01-01

    The paper summarizes the quality assurance (QA) activities of the Mitsubishi group regarding PWR plant construction. 1. To ensure a uniform approach to QA activities in the group, the Nuclear System Quality Assurance Administration Centre was established at the headquarters of Mitsubishi Heavy Industries. This Centre is engaged in establishing and promoting comprehensive QA plans, in supervising the interface control between the companies concerned, and in auditing each company's QA programme. 2. In parallel with endeavours to complete QA systems, a great effort has been made to instill consciousness of QA in everyone concerned with the work. It is emphasized that quality control (QC) circle activities play an important role in maintaining a high level of quality. An innovative system of design computerization coupled with model engineering is now being developed to improve design reliability and to prevent human error. Reliability improvement and preventive maintenance systems using computers are being introduced with the object of performing systematic corrective actions based on analyses of plant operation. (author)

  15. Relationship between physical activity and physical performance in later life in different birth weight groups.

    Science.gov (United States)

    Jantunen, H; Wasenius, N S; Salonen, M K; Perälä, M-M; Kautiainen, H; Simonen, M; Pohjolainen, P; Kajantie, E; von Bonsdorff, M B; Eriksson, J G

    2018-02-01

    There is strong evidence that physical activity (PA) has an influence on physical performance in later life. Also, a small body size at birth has been associated with lower physical functioning in older age and both small and high birth weight have shown to be associated with lower leisure time physical activity. However, it is unknown whether size at birth modulates the association between PA and physical performance in old age. We examined 695 individuals from the Helsinki Birth Cohort Study born in Helsinki, Finland between 1934 and 1944. At a mean age of 70.7 years PA was objectively assessed with a multisensory activity monitor and physical performance with the Senior Fitness Test (SFT). Information on birth weight and gestational age was retrieved from hospital birth records. The study participants were divided in three birth weight groups, that is birth weight groups. However, the effect size of the association was large and significant only in men with a birth weight confidence interval 0.37-0.81, Pbirth weight. Our results suggest that men with low birth weight might benefit most from engaging in PA in order to maintain a better physical performance.

  16. NEWBORNS OF HIGH RISK GROUPS AND ELECTROPHYSIOLOGICAL CARDIAC ACTIVITY DURING THE PERIOD OF EARLY ADAPTATION

    Directory of Open Access Journals (Sweden)

    T. S. Tumaeva

    2014-01-01

    Full Text Available Aim: to study characteristics of electrophysiological cardiac activity in children of risk groups and to assess possibilities of Holter-electrocardiography (H-ECG in revealing of cardiac dysfunction during the period of early adaptation. Patients and methods: 250 newborns were examined. The main group consisted of 200 children with cerebral ischemia (CI. This group was divided into 2 subgroups: 100 full-term and 100 premature (at various gestation age infants. Control group contained 50 children born at 38–40th weeks of gestation with physiological course of pregnancy and delivery, APGAR score of 8–9 points. Complex examination included H-ECG according the standard technic with evaluation of the hearth rate (HR during sleep and wakefulness; HRmin, HRmax; arrhythmias, conductivity disorders, duration of the intervals; rhythm variability. Results: according to the ECG children with CI, especially premature ones, and children delivered via Cesarean section more often had ST-T disturbances, arrhythmias (sinus tachycardia, less often — sinus bradycardia and conductivity disorders, Q-Tc prolongation. H-EGC revealed decrease of sleep HR, HRmin and HRmax in children with CI especially in delivered via Cesarean section. The most common arrhythmia was supraventricular extrasystole.  Pauses in rhythms and variability were the highest in premature children delivered via Cesarean section. Conclusions: hypoxia/ischemia is a trigger for development of cardiovascular dysfuncion in newborns. Premature and children delivered via Cesarean section form a group of high risk. H-ECG widens possibilities of revealing of symptoms of cardiac dysfunction (disturbances at the basal level of functioning, of adaptation resources of the sinus node, electric instability of the myocardium and heart rate variability in children of risk group for development of cardiovascular disorders. 

  17. ACTIVE GALACTIC NUCLEI IN GROUPS AND CLUSTERS OF GALAXIES: DETECTION AND HOST MORPHOLOGY

    International Nuclear Information System (INIS)

    Arnold, Timothy J.; Martini, Paul; Mulchaey, John S.; Berti, Angela; Jeltema, Tesla E.

    2009-01-01

    The incidence and properties of active galactic nuclei (AGNs) in the field, groups, and clusters can provide new information about how these objects are triggered and fueled, similar to how these environments have been employed to study galaxy evolution. We have obtained new XMM-Newton observations of seven X-ray selected groups and poor clusters with 0.02 -1 ). We find that the X-ray selected AGN fraction increases from f A (L X ≥ 10 41 ; M R ≤ M* R + 1) = 0.047 +0.023 -0.016 in clusters to 0.091 +0.049 -0.034 for the groups (85% significance), or a factor of 2, for AGN above an 0.3-8 keV X-ray luminosity of 10 41 ergs -1 hosted by galaxies more luminous than M* R + 1. The trend is similar, although less significant, for a lower-luminosity host threshold of M R = -20 mag. For many of the groups in the sample, we have also identified AGN via standard emission-line diagnostics and find that these AGNs are nearly disjoint from the X-ray selected AGN. Because there are substantial differences in the morphological mix of galaxies between groups and clusters, we have also measured the AGN fraction for early-type galaxies alone to determine if the differences are directly due to environment, or indirectly due to the change in the morphological mix. We find that the AGN fraction in early-type galaxies is also lower in clusters f A,n≥2.5 (L X ≥ 10 41 ; M R ≤ M* R + 1) = 0.048 +0.028 -0.019 compared to 0.119 +0.064 -0.044 for the groups (92% significance), a result consistent with the hypothesis that the change in AGN fraction is directly connected to environment.

  18. The use of music in group educational activities in Family Health.

    Science.gov (United States)

    Silva, Líliam Barbosa; Soares, Sônia Maria; da Silva, Maria Júlia Paes; Santos, Graziela da Costa; Fernandes, Maria Teresinha de Oliveira

    2013-01-01

    describe how music is used in the development of group educational activity in Family Health. a qualitative, descriptive and exploratory study, developed with 10 group coordinators, distributed in five basic care units in Belo Horizonte, Minas Gerais, Brazil. Data were collected from March to July, 2009, with non participant observation in the group itself, and semi-structured interviews with the coordinators. Information was organized and categorized according to thematic analysis. To interpret the data, the Snyderian concepts in addition to theoretical references about music, communication and health education were used. three thematic nuclei were found: the affective dimension of music; recreative dimension of music and the reflexive dimension of music. an attempt by the coordinators was observed, to overcome the pathological barriers with the use of music, considering the group as a whole. As advancement for the production of knowledge, this study shows the need for qualification of these coordinators, by means of workshops and constant follow-up of their musical practices.

  19. Amination of activated carbon for enhancing phenol adsorption: Effect of nitrogen-containing functional groups

    International Nuclear Information System (INIS)

    Yang, Guo; Chen, Honglin; Qin, Hangdao; Feng, Yujun

    2014-01-01

    To study the contribution of different nitrogen-containing functional groups to enhancement of phenol adsorption, the aminated activated carbons (AC) were characterized by N2 adsorption/desorption, XPS, Boehm titration, and pH drift method and tested for adsorption behaviors of phenol. Adsorption isotherm fitting revealed that the Langmuir model was preferred for the aminated ACs. The adsorption capacity per unit surface area (q m /SSA BET ) was linearly correlated with the amount of pyridinic and pyrrolic N, which suggested that these two functional groups played a critical role in phenol adsorption. The enhancement of adsorption capacity was attributed to the strengthened π–π dispersion between phenol and basal plane of AC by pyridinic, pyrrolic N. The adsorption kinetics was found to follow the pseudo-second-order kinetic model, and intraparticle diffusion was one of the rate-controlling steps in the adsorption process.

  20. Oxidation of an activated carbon commercial and characterization of the content of superficial acid groups

    International Nuclear Information System (INIS)

    Cortes, Juan Carlos; Giraldo Liliana; Garcia, Andres A; Garcia, Cesar; Moreno, Juan C

    2008-01-01

    The changes of the surface acid groups of an activated commercial carbon after placing it under oxidation treatment with nitric acid are studied. The time used was in the range 1.5 and 9 hours, the concentrations range was from 4 to 7 molL -1 . The study included the determination of immersion enthalpy. Boehm's type titrations, FTIR, and pH at the point of zero charge, pH p zc. It was found that total acid groups are in a range from 0.207 mmolg -1 to 1.247 mmolg -1 , and that they are proportional to the immersion enthalpy in NaOH that are between 40 and 54Jg -1 . The pH p zc decreases with the oxidation treatment and have values between 8.3 and 4.3

  1. Active case finding and treatment adherence in risk groups in the tuberculosis pre-elimination era.

    Science.gov (United States)

    Gupta, R K; Lipman, M; Story, A; Hayward, A; de Vries, G; van Hest, R; Erkens, C; Rangaka, M X; Abubakar, I

    2018-05-01

    Vulnerable populations, including homeless persons, high-risk drug and alcohol users, prison inmates and other marginalised populations, contribute a disproportionate burden of tuberculosis (TB) cases in low-incidence settings. Drivers of this disease burden include an increased risk of both TB transmission in congregate settings, and progression from infection to active disease. Late diagnosis and poor treatment completion further propagate the epidemic and fuel the acquisition of drug resistance. These groups are therefore a major priority for TB control programmes in low-incidence settings. Targeted strategies include active case finding (ACF) initiatives and interventions to improve treatment completion, both of which should be tailored to local populations. ACF usually deploys mobile X-ray unit screening, which allows sensitive, high-throughput screening with immediate availability of results. Such initiatives have been found to be effective and cost-effective, and associated with reductions in proxy measures of transmission in hard-to-reach groups. The addition of point-of-care molecular diagnostics and automated X-ray readers may further streamline the screening pathway. There is little evidence to support interventions to improve adherence among these risk groups. Such approaches include enhanced case management and directly observed treatment, while video-observed therapy (currently under evaluation) appears to be a promising tool for the future. Integrating outreach services to include both case detection and case-management interventions that share a resource infrastructure may allow cost-effectiveness to be maximised. Integrating screening and treatment for other diseases that are prevalent among targeted risk groups into TB outreach interventions may further improve cost-effectiveness. This article reviews the existing literature, and highlights priorities for further research.

  2. Antenatal physical activity: a qualitative study exploring women's experiences and the acceptability of antenatal walking groups.

    Science.gov (United States)

    Currie, Sinéad; Gray, Cindy; Shepherd, Ashley; McInnes, Rhona J

    2016-07-22

    Regular physical activity (PA) can be beneficial to pregnant women, however, many women do not adhere to current PA guidelines during the antenatal period. Patient and public involvement is essential when designing antenatal PA interventions in order to uncover the reasons for non-adherence and non-engagement with the behaviour, as well as determining what type of intervention would be acceptable. The aim of this research was to explore women's experiences of PA during a recent pregnancy, understand the barriers and determinants of antenatal PA and explore the acceptability of antenatal walking groups for further development. Seven focus groups were undertaken with women who had given birth within the past five years. Focus groups were transcribed and analysed using a grounded theory approach. Relevant and related behaviour change techniques (BCTs), which could be applied to future interventions, were identified using the BCT taxonomy. Women's opinions and experiences of PA during pregnancy were categorised into biological/physical (including tiredness and morning sickness), psychological (fear of harm to baby and self-confidence) and social/environmental issues (including access to facilities). Although antenatal walking groups did not appear popular, women identified some factors which could encourage attendance (e.g. childcare provision) and some which could discourage attendance (e.g. walking being boring). It was clear that the personality of the walk leader would be extremely important in encouraging women to join a walking group and keep attending. Behaviour change technique categories identified as potential intervention components included social support and comparison of outcomes (e.g. considering pros and cons of behaviour). Women's experiences and views provided a range of considerations for future intervention development, including provision of childcare, involvement of a fun and engaging leader and a range of activities rather than just walking

  3. “Convivência” Groups: Building Active and Healthy Communities of Older Adults in Brazil

    OpenAIRE

    Benedetti, Tânia R. Bertoldo; d'Orsi, Eleonora; Schwingel, Andiara; Chodzko-Zajko, Wojtek J.

    2012-01-01

    In old age, social groups can be a crucial component for health and well-being. In 2009-2010, a follow-up survey was carried out in Florianópolis, Brazil to understand the impact of a variety of programs established since 2002 that were designed to enhance social activities among the older adult population. This study employed two surveys within the population of older adults in Florianópolis. The first survey interviewed a total of 875 older adults in 2002, and the second survey involved 1,7...

  4. Soft skills: an important asset acquired from organizing regional student group activities.

    Science.gov (United States)

    de Ridder, Jeroen; Meysman, Pieter; Oluwagbemi, Olugbenga; Abeel, Thomas

    2014-07-01

    Contributing to a student organization, such as the International Society for Computational Biology Student Council (ISCB-SC) and its Regional Student Group (RSG) program, takes time and energy. Both are scarce commodities, especially when you are trying to find your place in the world of computational biology as a graduate student. It comes as no surprise that organizing ISCB-SC-related activities sometimes interferes with day-to-day research and shakes up your priority list. However, we unanimously agree that the rewards, both in the short as well as the long term, make the time spent on these extracurricular activities more than worth it. In this article, we will explain what makes this so worthwhile: soft skills.

  5. Engaging families in physical activity research: a family-based focus group study.

    Science.gov (United States)

    Brown, Helen Elizabeth; Schiff, Annie; van Sluijs, Esther M F

    2015-11-25

    Family-based interventions present a much-needed opportunity to increase children's physical activity levels. However, little is known about how best to engage parents and their children in physical activity research. This study aimed to engage with the whole family to understand how best to recruit for, and retain participation in, physical activity research. Families (including a 'target' child aged between 8 and 11 years, their parents, siblings, and others) were recruited through schools and community groups. Focus groups were conducted using a semi-structured approach (informed by a pilot session). Families were asked to order cards listing the possible benefits of, and the barriers to, being involved in physical activity research and other health promotion activities, highlighting the items they consider most relevant, and suggesting additional items. Duplicate content analysis was used to identify transcript themes and develop a coding frame. Eighty-two participants from 17 families participated, including 17 'target' children (mean age 9.3 ± 1.1 years, 61.1% female), 32 other children and 33 adults (including parents, grandparents, and older siblings). Social, health and educational benefits were cited as being key incentives for involvement in physical activity research, with emphasis on children experiencing new things, developing character, and increasing social contact (particularly for shy children). Children's enjoyment was also given priority. The provision of child care or financial reward was not considered sufficiently appealing. Increased time commitment or scheduling difficulties were quoted as the most pertinent barriers to involvement (especially for families with several children), but parents commented these could be overcome if the potential value for children was clear. Lessons learned from this work may contribute to the development of effective recruitment and retention strategies for children and their families. Making the wide

  6. Applied nuclear physics group - activities report. 1977-1997; Grupo de fisica nuclear aplicada - relatorio de atividades. 1977-1997

    Energy Technology Data Exchange (ETDEWEB)

    Appoloni, Carlos Roberto

    1998-06-01

    This report presents the activities conducted by the Applied Nuclear Physics group of the Londrina State University - Applied Nuclear Physics Laboratory - Brazil, from the activities beginning (1977) up to the end of the year 1997.

  7. Activities of the IAEA International Working Group on Life Management of Nuclear Power Plants (IWG-LMNPP)

    International Nuclear Information System (INIS)

    Ianko, L.

    1994-01-01

    Activities of the IAEA international working group on life management of nuclear power plants are outlined with emphasis on objectives, scope of activities, methods of work, organizational matters, financing

  8. Antidiabetic Effect of an Active Components Group from Ilex kudingcha and Its Chemical Composition

    Directory of Open Access Journals (Sweden)

    Chengwu Song

    2012-01-01

    Full Text Available The leaves of Ilex kudingcha are used as an ethnomedicine in the treatment of symptoms related with diabetes mellitus and obesity throughout the centuries in China. The present study investigated the antidiabetic activities of an active components group (ACG obtained from Ilex kudingcha in alloxan-induced type 2 diabetic mice. ACG significantly reduced the elevated levels of serum glycaemic and lipids in type 2 diabetic mice. 3-Hydroxy-3-methylglutaryl coenzyme A reductase and glucokinase were upregulated significantly, while fatty acid synthetase, glucose-6-phosphatase catalytic enzyme was downregulated in diabetic mice after treatment of ACG. These findings clearly provided evidences regarding the antidiabetic potentials of ACG from Ilex kudingcha. Using LC-DAD/HR-ESI-TOF-MS, six major components were identified in ACG. They are three dicaffeoylquinic acids that have been reported previously, and three new triterpenoid saponins, which were the first time to be identified in Ilex kudingcha. It is reasonable to assume that antidiabetic activity of Ilex kudingcha against hyperglycemia resulted from these six major components. Also, synergistic effects among their compounds may exist in the antidiabetic activity of Ilex kudingcha.

  9. Synthesis, characterization and catalytic activity of acid-base bifunctional materials through protection of amino groups

    Energy Technology Data Exchange (ETDEWEB)

    Shao, Yanqiu [College of Chemistry, Jilin University, Changchun 130023 (China); College of Chemistry, Mudanjiang Normal University, Mudanjiang 157012 (China); Liu, Heng; Yu, Xiaofang [College of Chemistry, Jilin University, Changchun 130023 (China); Guan, Jingqi, E-mail: guanjq@jlu.edu.cn [College of Chemistry, Jilin University, Changchun 130023 (China); Kan, Qiubin, E-mail: qkan@mail.jlu.edu.cn [College of Chemistry, Jilin University, Changchun 130023 (China)

    2012-03-15

    Graphical abstract: Acid-base bifunctional mesoporous material SO{sub 3}H-SBA-15-NH{sub 2} was successfully synthesized under low acidic medium through protection of amino groups. Highlights: Black-Right-Pointing-Pointer The acid-base bifunctional material SO{sub 3}H-SBA-15-NH{sub 2} was successfully synthesized through protection of amino groups. Black-Right-Pointing-Pointer The obtained bifunctional material was tested for aldol condensation. Black-Right-Pointing-Pointer The SO{sub 3}H-SBA-15-NH{sub 2} catalyst containing amine and sulfonic acid groups exhibited excellent acid-basic properties. -- Abstract: Acid-base bifunctional mesoporous material SO{sub 3}H-SBA-15-NH{sub 2} was successfully synthesized under low acidic medium through protection of amino groups. X-ray diffraction (XRD), N{sub 2} adsorption-desorption, transmission electron micrographs (TEM), back titration, {sup 13}C magic-angle spinning (MAS) NMR and {sup 29}Si magic-angle spinning (MAS) NMR were employed to characterize the synthesized materials. The obtained bifunctional material was tested for aldol condensation reaction between acetone and 4-nitrobenzaldehyde. Compared with monofunctional catalysts of SO{sub 3}H-SBA-15 and SBA-15-NH{sub 2}, the bifunctional sample of SO{sub 3}H-SBA-15-NH{sub 2} containing amine and sulfonic acid groups exhibited excellent acid-basic properties, which make it possess high activity for the aldol condensation.

  10. Promoting physical activity among adolescent girls: the Girls in Sport group randomized trial.

    Science.gov (United States)

    Okely, Anthony D; Lubans, David R; Morgan, Philip J; Cotton, Wayne; Peralta, Louisa; Miller, Judith; Batterham, Marijka; Janssen, Xanne

    2017-06-21

    Slowing the decline in participation in physical activity among adolescent girls is a public health priority. This study reports the outcomes from a multi-component school-based intervention (Girls in Sport), focused on promoting physical activity among adolescent girls. Group randomized controlled trial in 24 secondary schools (12 intervention and 12 control). Assessments were conducted at baseline (2009) and at 18 months post-baseline (2010). The setting was secondary schools in urban, regional and rural areas of New South Wales, Australia. All girls in Grade 8 in 2009 who attended these schools were invited to participate in the study (N = 1769). Using a Health Promoting Schools and Action Learning Frameworks, each school formed a committee and developed an action plan for promoting physical activity among Grade 8 girls. The action plan incorporated strategies in three main areas - i) the formal curriculum, ii) school environment, and iii) home/school/community links - based on the results of formative data from target girls and staff and on individual needs of the school. A member of the research team supported each school throughout the intervention. The main outcome measure was accelerometer-derived total physical activity (TPA) spent in physical activity. Data were analyzed from December 2011 to March 2012. 1518 girls (mean age 13.6y ±0.02) were assessed at baseline. There was a significant decline in TPA from baseline to 18-month follow-up with no differences between girls in the intervention and control schools. Only one-third of schools (4/12) implemented the intervention as per their action plan. Per-protocol analyses on these schools revealed a smaller decline in percentage of time spent in MVPA among girls in the intervention group (adjusted difference 0.5%, 95% CI = -0.01, 0.99, P = 0.05). The Girls in Sport intervention was not effective in reducing the decline in physical activity among adolescent girls. Lack of implementation by most

  11. Nonplanar tertiary amides in rigid chiral tricyclic dilactams. Peptide group distortions and vibrational optical activity.

    Science.gov (United States)

    Pazderková, Markéta; Profant, Václav; Hodačová, Jana; Sebestík, Jaroslav; Pazderka, Tomáš; Novotná, Pavlína; Urbanová, Marie; Safařík, Martin; Buděšínský, Miloš; Tichý, Miloš; Bednárová, Lucie; Baumruk, Vladimír; Maloň, Petr

    2013-08-22

    We investigate amide nonplanarity in vibrational optical activity (VOA) spectra of tricyclic spirodilactams 5,8-diazatricyclo[6,3,0,0(1,5)]undecan-4,9-dione (I) and its 6,6',7,7'-tetradeuterio derivative (II). These rigid molecules constrain amide groups to nonplanar geometries with twisted pyramidal arrangements of bonds to amide nitrogen atoms. We have collected a full range vibrational circular dichroism (VCD) and Raman optical activity (ROA) spectra including signals of C-H and C-D stretching vibrations. We report normal-mode analysis and a comparison of calculated to experimental VCD and ROA. The data provide band-to-band assignment and offer a possibility to evaluate roles of constrained nonplanar tertiary amide groups and rigid chiral skeletons. Nonplanarity shows as single-signed VCD and ROA amide I signals, prevailing the couplets expected to arise from the amide-amide interaction. Amide-amide coupling dominates amide II (mainly C'-N stretching, modified in tertiary amides by the absence of a N-H bond) transitions (strong couplet in VCD, no significant ROA) probably due to the close proximity of amide nitrogen atoms. At lower wavenumbers, ROA spectra exhibit another likely manifestation of amide nonplanarity, showing signals of amide V (δ(oop)(N-C) at ~570 cm(-1)) and amide VI (δ(oop)(C'═O) at ~700 cm(-1) and ~650 cm(-1)) vibrations.

  12. Activity of Genital Tract Secretions and Synthetic Antimicrobial Peptides against Group B Streptococcus.

    Science.gov (United States)

    Agarwal, Nidhi; Buckley, Niall; Nakra, Natasha; Gialanella, Philip; Yuan, Weirong; Ghartey, Jeny P

    2015-12-01

    Genital tract secretions inhibit Escherichia coli (E. coli) through antimicrobial peptides (AMP) secreted by the host and vaginal microbiota. However, there are limited data against group B Streptococcus (GBS). Group B Streptococcus were incubated with cervico-vaginal lavage (CVL) samples from healthy non-pregnant women (n = 12) or synthetic AMP and monitored for bacterial growth using a turbidimetric approach. E. coli inhibitory activity was determined by a colony-forming unit assay. None of the CVL samples inhibited GBS. The human neutrophil peptide-1 and human defensin 5 inhibited GBS growth by ≥80% at concentrations ≥20 μg/mL and ≥50 μg/mL, respectively, while human beta-defensin 2 and LL-37 did not inhibit at highest concentration tested (100 μg/mL). In contrast, all AMP inhibited E. coli. Antimicrobial peptides may protect against E. coli colonization but have more limited activity against GBS. Future studies will focus on augmenting host defense with specific AMP to prevent genitourinary infection with these pathogenic organisms. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  13. Capacidad de uso de las tierras en la microcuenca El Limón, complejo de cuencas Sabana Yegua, República Dominicana Land use capacity in the mini watershed El Limón, Sabana Yegua Watershed Complex, Dominican Republic

    Directory of Open Access Journals (Sweden)

    Maldané Cuello Espinoza

    2013-03-01

    Full Text Available Este estudio aborda el análisis biofísico de las tierras en la microcuenca El Limón, en el complejo de Cuencas Altas de Sabana Yegua en República Dominicana. El objetivo del ensayo fue determinar la capacidad de uso de las tierras considerando las limitaciones del suelo, el clima y la geomorfología que presenta. Se propone una serie de prácticas de manejo como opciones para reducir la erosión, mejorar el suelo y acondicionar los caminos, lo que permitiría mantener condiciones favorables para el manejo racional del sistema. De esa forma, con este objetivo se establecen y se integran por primera vez en una cuenca del país varios elementos limitantes para con su identificación proponer prácticas apropiadas que controlen el problema de degradación acelerada que experimenta el área bajo estudio. Para ello, se determinaron parámetros fundamentales, los cuales abarcan factores de erosión, suelo, drenaje y clima, en función de lo que establece la metodología MAG/FAO/UNED (1996, la cual se usa en Costa Rica para determinar la capacidad de uso de las tierras y ha sido adaptada al área objeto de este estudio. Esta metodología integra clases de tierras que van desde la I hasta la VIII según la frecuencia y grado de las limitantes que se identifican. Para su aplicación en la microcuenca El Limón, se han incluido otros parámetros físicos que no contemplan dicha metodología, tales como la densidad aparente del suelo y los parámetros climáticos de lluvia y temperatura, estos últimos con el fin de establecer la zona de vida del área. Se pudo determinar que las clases de tierras en la microcuenca El Limón van desde la III hasta la VIII, las cuales son aptas para protección, sistemas forestales y agroforestería. De igual manera, se estableció que las mayores limitantes que se presentan son las concernientes a la erosión y al drenaje del suelo. Para frenar y corregir los efectos de estas limitantes, las prácticas de manejo

  14. Perceptions of physical activity, activity preferences and health among a group of adult women in urban Ghana: a pilot study.

    Science.gov (United States)

    Tuakli-Wosornu, Y A; Rowan, M; Gittelsohn, J

    2014-03-01

    Obesity and other lifestyle-related chronic diseases impact urban West African women at high rates. Physical activity (PA) can improve these health outcomes but there is little published data on the associated psychosocial predictors in this population. We aimed to explore preliminary associations between perceptions of PA, PA behaviours, and health in a group of Ghanaian women. Non-experimental, cross-sectional case study using a mixed-methods approach. Focus groups and in-depth interviews with a convenience sample of Ghanaian women, fitness trainers and clergy comprised the qualitative phase. A self-administered survey (n=218) comprised the quantitative phase. Constant comparative method, logistic regression, component and factor analyses were used for analysis. Women viewed activities of daily living like housework as PA; rarely utilized organized fitness facilities; understood "rigorous" PA as professional male athleticism; and took interest in socialized PA. Mean age was 49.4 years. Mean body mass index was 30.3 kg/m2. The majority (75.9 %) reported exercising sometimes or often. Half (48.4%) reported a lifestyle-related chronic disease. "Weight loss," "health concerns" and "increased energy," were top motivators for PA. "Can't find the time," "work/family obligations," and "don't have a facility" were top barriers. Presence of hypertension, hypercholesterolemia and prior weight loss correlated with the slimming motivator (adjusted odds ratio 2.59, p=0.008; AOR 3.56, p=0.012; AOR 3.36, p=surveyed, PA motivators and barriers were associated with demographics, PA exposure, and health status. Further research on unique PA perceptions, behaviours and health could catalyze health promotion through culturally relevant fitness programming.

  15. Predictive value of European Scleroderma Group Activity Index in an early scleroderma cohort.

    Science.gov (United States)

    Nevskaya, Tatiana; Baron, Murray; Pope, Janet E

    2017-07-01

    To estimate the effect of disease activity, as measured by the European Scleroderma Research Group Activity Index (EScSG-AI), on the risk of subsequent organ damage in a large systemic sclerosis (SSc) cohort. Of 421 SSc patients from the Canadian Scleroderma Research Group database with disease duration of ⩽ 3 years, 197 who had no evidence of end-stage organ damage initially and available 3 year follow-up were included. Disease activity was assessed by the EScSG-AI with two variability measures: the adjusted mean EScSG-AI (the area under the curve of the EScSG-AI over the observation period) and persistently active disease/flare. Outcomes were based on the Medsger severity scale and included accrual of a new severity score (Δ ⩾ 1) overall and within organ systems or reaching a significant level of deterioration in health status. After adjustment for covariates, the adjusted mean EScSG-AI was the most consistent predictor of risk across the study outcomes over 3 years in dcSSc: disease progression defined as Δ ⩾ 1 in any major internal organ, significant decline in forced vital capacity and diffusing capacity of carbon monoxide, severity of visceral disease and HAQ Disability Index worsening. In multivariate analysis, progression of lung disease was predicted solely by adjusted mean EScSG-AI, while the severity of lung disease was predicted the adjusted mean EScSG-AI, older age, modified Rodnan skin score (mRSS) and initial severity. The EScSG-AI was associated with patient- and physician-assessed measures of health status and overpowered the mRSS in predicting disease outcomes. Disease activity burden quantified with the adjusted mean EScSG-AI predicted the risk of deterioration in health status and severe organ involvement in dcSSc. The EScSG-AI is more responsive when done repeatedly and averaged. © The Author 2017. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email

  16. Understanding the value added to clinical care by educational activities. Value of Education Research Group.

    Science.gov (United States)

    Ogrinc, G S; Headrick, L A; Boex, J R

    1999-10-01

    In an era of competition in health care delivery, those who pay for care are interested in supporting primarily those activities that add value to the clinical enterprise. The authors report on their 1998 project to develop a conceptual model for assessing the value added to clinical care by educational activities. Through interviews, nine key stakeholders in patient care identified five ways in which education might add value to clinical care: education can foster higher-quality care, improve work satisfaction of clinicians, have trainees provide direct clinical services, improve recruitment and retention of clinicians, and contribute to the future of health care. With this as a base, an expert panel of 13 clinical educators and investigators defined six perspectives from which the value of education in clinical care might be studied: the perspectives of health-care-oriented organizations, clinician-teachers, patients, education organizations, learners, and the community. The panel adapted an existing model to create the "Education Compass" to portray education's effects on clinical care, and developed a new set of definitions and research questions for each of the four major aspects of the model (clinical, functional, satisfaction, and cost). Working groups next drafted proposals to address empirically those questions, which were critiqued at a national conference on the topic of education's value in clinical care. The next step is to use the methods developed in this project to empirically assess the value added by educational activities to clinical care.

  17. Synthesis and Antiproliferative Activity of Minor Hops Prenylflavonoids and New Insights on Prenyl Group Cyclization

    Directory of Open Access Journals (Sweden)

    Jarosław Popłoński

    2018-03-01

    Full Text Available Synthesis of minor prenylflavonoids found in hops and their non-natural derivatives were performed. The antiproliferative activity of the obtained compounds against some human cancer cell lines was investigated. Using xanthohumol isolated from spent hops as a lead compound, a series of minor hop prenylflavonoids and synthetic derivatives were obtained by isomerization, cyclisation, oxidative-cyclisation, oxidation, reduction and demethylation reactions. Three human cancer cell lines—breast (MCF-7, prostate (PC-3 and colon (HT-29—were used in antiproliferative assays, with cisplatin as a control compound. Five minor hop prenyl flavonoids and nine non-natural derivatives of xanthohumol have been synthetized. Syntheses of xanthohumol K, its dihydro- and tetrahydro-derivatives and 1″,2″,α,β-tetrahydroxanthohumol C were described for the first time. All of the minor hops prenyl flavonoids exhibited strong to moderate antiproliferative activity in vitro. The minor hops flavonoids xanthohumol C and 1″,2″-dihydroxanthohumol K and non-natural 2,3-dehydroisoxanthohumol exhibited the activity comparable to cisplatin. Results described in the article suggest that flavonoids containing chromane- and chromene-like moieties, especially chalcones, are potent antiproliferative agents. The developed new efficient, regioselective cyclisation reaction of the xanthohumol prenyl group to 1″,2″-dihydroxantohumol K may be used in the synthesis of other compounds with the chromane moiety.

  18. Towards the Development of a Second-Order Approximation in Activity Coefficient Models Based on Group Contributions

    DEFF Research Database (Denmark)

    Abildskov, Jens; Constantinou, Leonidas; Gani, Rafiqul

    1996-01-01

    A simple modification of group contribution based models for estimation of liquid phase activity coefficients is proposed. The main feature of this modification is that contributions estimated from the present first-order groups in many instances are found insufficient since the first-order groups...... correlation/prediction capabilities, distinction between isomers and ability to overcome proximity effects....

  19. Preferential Acquisition and Activation of Plasminogen Glycoform II by PAM Positive Group A Streptococcal Isolates.

    Science.gov (United States)

    De Oliveira, David M P; Law, Ruby H P; Ly, Diane; Cook, Simon M; Quek, Adam J; McArthur, Jason D; Whisstock, James C; Sanderson-Smith, Martina L

    2015-06-30

    Plasminogen (Plg) circulates in the host as two predominant glycoforms. Glycoform I Plg (GI-Plg) contains glycosylation sites at Asn289 and Thr346, whereas glycoform II Plg (GII-Plg) is exclusively glycosylated at Thr346. Surface plasmon resonance experiments demonstrated that Plg binding group A streptococcal M protein (PAM) exhibits comparative equal affinity for GI- and GII-Plg in the "closed" conformation (for GII-Plg, KD = 27.4 nM; for GI-Plg, KD = 37.0 nM). When Plg was in the "open" conformation, PAM exhibited an 11-fold increase in affinity for GII-Plg (KD = 2.8 nM) compared with that for GI-Plg (KD = 33.2 nM). The interaction of PAM with Plg is believed to be mediated by lysine binding sites within kringle (KR) 2 of Plg. PAM-GI-Plg interactions were fully inhibited with 100 mM lysine analogue ε-aminocaproic acid (εACA), whereas PAM-GII-Plg interactions were shown to be weakened but not inhibited in the presence of 400 mM εACA. In contrast, binding to the KR1-3 domains of GII-Plg (angiostatin) by PAM was completely inhibited in the presence 5 mM εACA. Along with PAM, emm pattern D GAS isolates express a phenotypically distinct SK variant (type 2b SK) that requires Plg ligands such as PAM to activate Plg. Type 2b SK was able to generate an active site and activate GII-Plg at a rate significantly higher than that of GI-Plg when bound to PAM. Taken together, these data suggest that GAS selectively recruits and activates GII-Plg. Furthermore, we propose that the interaction between PAM and Plg may be partially mediated by a secondary binding site outside of KR2, affected by glycosylation at Asn289.

  20. Comparing the Effects of Group and Home-based Physical Activity on Mental Health in the Elderly.

    Science.gov (United States)

    Mortazavi, Seyede Salehe; Shati, Mohsen; Ardebili, Hassan Eftekhar; Mohammad, Kazem; Beni, Reza Dorali; Keshteli, A H

    2013-11-01

    The present study focuses on comparing the effects of home-based (HB) and group-based (GB) physical activity on mental health in a sample of older adults in Shahr-e-kord. In this quasi-experimental study, a twice-weekly physical activity program for 2 months was provided either individually at home or in a group format for 181 people who were divided into two groups (HB and GB). The outcome, mental health, was measured with the 28-item General Health Questionnaire (GHQ-28). Mental health status improved after participation in the physical activity program. The decrease in GHQ-28 total score in GB group, 3 months after intervention, was 3.61 ± 2.28 (P effects of GB physical activity on mental health compared with HB physical activity, adjusted for related baseline variables, were significant. These findings reveal the probable effects of GB rather than HB physical activity on mental health among the elderly.

  1. Teaching high-school Geoscience through a group-based activity: the Geotrivia experiment

    Science.gov (United States)

    Bakopoulou, Athanasia

    2015-04-01

    Geotrivia is an educational game which aims at the enhancement of geoscience teaching in secondary education, through an interactive group-based activity. As behavioural teaching methods no longer excite students in a multitask society, new approaches should be implemented to keep up with novel learning methodologies and team-based techniques. Thus, the main aim of the experiment was to come up with an alternative learning process on geology and geography in order to upgrade and attract more students to Geosciences. Geotrivia is based on the techniques of motivation (competition to be the winner) and enjoyable educational time (it is funny to play a game) in terms of team-based student collaboration. Pedagogical aims of Geotrivia consist of team-based work, independency, autonomy and initiative, active participation, student self-evaluation and metacognition. Geotrivia is a card game, consisting of about 150 playing cards, a whistle and an hourglass. Each playing card contains a geology- or geography-related question and the answer to the question is given in the lower part of the card. Class students are divided in about 4 groups of about 5 students each. The aim of each group is to collect as many cards as possible. The hourglass is flipped and a member of the team takes the pack of cards and uses it to ask questions to his team; the other members have to answer as many questions. The team wins a card when they give a correct answer. The game is played at the end of each curriculum unit; a comprehensive version of the game is held at end of the school year. Most -but not all- questions are based on the course syllabus, which deals with the geology and geography of Europe at junior high school level (e.g. what is the cause of high seismicity in Greece?). Accordingly, Geotrivia questions can be adjusted to each country school book of geology - geography at any grade. To evaluate the results of Geotrivia, we used the methodology of pretest and posttest, an

  2. Copper-catalyzed recycling of halogen activating groups via 1,3-halogen migration.

    Science.gov (United States)

    Grigg, R David; Van Hoveln, Ryan; Schomaker, Jennifer M

    2012-10-03

    A Cu(I)-catalyzed 1,3-halogen migration reaction effectively recycles an activating group by transferring bromine or iodine from a sp(2) to a benzylic carbon with concomitant borylation of the Ar-X bond. The resulting benzyl halide can be reacted in the same vessel under a variety of conditions to form an additional carbon-heteroatom bond. Cross-over experiments using an isotopically enriched bromide source support intramolecular transfer of Br. The reaction is postulated to proceed via a Markovnikov hydrocupration of the o-halostyrene, oxidative addition of the resulting Cu(I) complex into the Ar-X bond, reductive elimination of the new sp(3) C-X bond, and final borylation of an Ar-Cu(I) species to turn over the catalytic cycle.

  3. Continuous-Flow Monolithic Silica Microreactors with Arenesulphonic Acid Groups: Structure–Catalytic Activity Relationships

    Directory of Open Access Journals (Sweden)

    Agnieszka Ciemięga

    2017-08-01

    Full Text Available The performance of monolithic silica microreactors activated with sulphonic acid groups and a packed bed reactor with Amberlyst 15 resin were compared in the esterification of acetic acid with n-butanol. The monolithic microreactors were made of single silica rods with complex pore architecture, differing in the size of mesopores, and in particular, flow-through macropores which significantly affected the flow characteristic of the continuous system. The highest ester productivity of 105.2 mol·molH+−1·h−1 was achieved in microreactor M1 with the largest porosity, characterized by a total pore volume of 4 cm3·g−1, mesopores with 20 nm diameter, and large flow-through macropores 30–50 μm in size. The strong impact of the permeability of the monoliths on a reaction kinetics was shown.

  4. Los espantos de La sabana: leyendas y religiosidad de los Llanos venezolanos (The ghosts of Savannah: Legends and religion of the Venezuelan Ilanos - DOI: 10.5752/P.2175-5841.2013v11n30p572

    Directory of Open Access Journals (Sweden)

    Jenny González Muñoz

    2013-06-01

    Full Text Available Los procesos culturales de los pueblos rurales de América Latina en cuanto a su parte inmaterial, están íntimamente relacionados con la memoria colectiva y/o social, la cual puede fungir, entre otras cosas, para afianzar la transmisión de leyendas creadas por la sabiduría popular por medio de la tradición oral. En los llanos centro-occidentales venezolanos a lo largo de más dos siglos se ha diseminado cantidad de leyendas que cuentan la aparición de espíritus que vagan por las sabanas solitarias, sobre todo en las noches de mayor oscuridad; los llamados “espantos de la sabana” son las almas de antiguos pobladores, ya conocidos, que deambulan pidiendo oraciones para su descanso eterno, o por no poder encontrar la paz que procuran. Dichas narraciones, al pasar de generación en generación forman parte de la identidad llanera y son incluidas en la literatura nacional; en el presente artículo se destaca esta característica colocando como ejemplo la novela de Rómulo Gallegos, Cantaclaro, así como coplas populares o aquellas recopiladas por Alberto Arvelo Torrealba para establecer el enlace existente entre la creación y transmisión de las leyendas y la religiosidad de dicha cultura. Palabras clave: Espantos de la sabana. Leyendas populares. Llanos centro-occidentales venezolanos. Religiosidad. Abstract Cultural processes of rural populations in Latin America while its immaterial dimension, are closely related to social and collective memory, which can serve, among other thins, to strengthen the transmission of legends created by wisdom through oral tradition. In the plains of the Midwest Venezuelan, during more than two centuries, were heard many legends that tell the apparition of spirits which roam the savannas lonely, especially on the darkest nights. These "ghosts of Savannah" are the souls of old settlers who roam (roam because they can not find peace or because they are asking for prayers for his eternal rest. These stories

  5. Work relating to defect assessment undertaken by activity group 2 of the European Commission's working group on codes and standards. WGCS overview

    International Nuclear Information System (INIS)

    Townley, C.H.A.; Guinovart, J.

    1995-01-01

    For about twenty years, the Working Group on Codes and Standards has been an Advisory Group of the European Commission and three sub-groups AG1, AG2 and AG3, were formed to consider manufacture and inspection, structural mechanics and materials topics respectively. Representation on the Working Group and its sub-groups comes from designers, utilities and atomic energy agencies in those member States with active nuclear power programmes. There has also been a very valuable input from universities and research organisations in the countries concerned. The method of working is to identify topics on which there is a difference of opinion; projects are set up to review the up to date scientific and technological knowledge. The investigations are undertaken collaboratively by specialists from as many countries as can contribute and there is an obligation to reach conclusions which can be put to practical use by engineers. While the Working group and its sub-groups are not directly involved in the production of standards, there is a very important input to the pre-standardization process. The work produced by AG2 covered a wide range of subjects associated with structural integrity, mainly concerning the Fast Breeder Reactors. Since 1991 the Group has progressively set up Light Water Reactor programmes. Currently, most of efforts are devoted to Thermal Reactors with a minor extent to Fast Breeder Reactors. The present paper is mainly concerned with those aspects of the AG2 activities which have a bearing on defect assessment. Although work was initiated as part of the FBR programme, it must be remembered that the greater part of it can be extended to a wide range of high temperature plants. Concerning the LWR programmes, an overview on current selected studies is being provided in this paper. (authors). 23 refs

  6. Identifying group-sensitive physical activities: a differential item functioning analysis of NHANES data.

    Science.gov (United States)

    Gao, Yong; Zhu, Weimo

    2011-05-01

    The purpose of this study was to identify subgroup-sensitive physical activities (PA) using differential item functioning (DIF) analysis. A sub-unweighted sample of 1857 (men=923 and women=934) from the 2003-2004 National Health and Nutrition Examination Survey PA questionnaire data was used for the analyses. Using the Mantel-Haenszel, the simultaneous item bias test, and the ANOVA DIF methods, 33 specific leisure-time moderate and/or vigorous PA (MVPA) items were analyzed for DIF across race/ethnicity, gender, education, income, and age groups. Many leisure-time MVPA items were identified as large DIF items. When participating in the same amount of leisure-time MVPA, non-Hispanic blacks were more likely to participate in basketball and dance activities than non-Hispanic whites (NHW); NHW were more likely to participated in golf and hiking than non-Hispanic blacks; Hispanics were more likely to participate in dancing, hiking, and soccer than NHW, whereas NHW were more likely to engage in bicycling, golf, swimming, and walking than Hispanics; women were more likely to participate in aerobics, dancing, stretching, and walking than men, whereas men were more likely to engage in basketball, fishing, golf, running, soccer, weightlifting, and hunting than women; educated persons were more likely to participate in jogging and treadmill exercise than less educated persons; persons with higher incomes were more likely to engage in golf than those with lower incomes; and adults (20-59 yr) were more likely to participate in basketball, dancing, jogging, running, and weightlifting than older adults (60+ yr), whereas older adults were more likely to participate in walking and golf than younger adults. DIF methods are able to identify subgroup-sensitive PA and thus provide useful information to help design group-sensitive, targeted interventions for disadvantaged PA subgroups. © 2011 by the American College of Sports Medicine

  7. Characterization of bacterial functional groups and microbial activity in microcosms with glyphosate application

    Science.gov (United States)

    Moyano, Sofia; Bonetto, Mariana; Baigorria, Tomas; Pegoraro, Vanesa; Ortiz, Jimena; Faggioli, Valeria; Conde, Belen; Cazorla, Cristian; Boccolini, Monica

    2017-04-01

    Glyphosate is a worldwide used herbicide as c. 90% of transgenic crops are tolerant to it. Microbial degradation of glyphosate molecule in soil is considered the most important process that determines its persistence in the environment. However, the impact of this herbicide on target groups of soil biota remains poorly understood. Our objective was to characterize the abundance of bacterial groups and global microbial activity, under controlled conditions with application of increasing doses of glyphosate. A bioassay was carried out in microcosms using an agricultural soil (Typic Argiudoll) with registered history of glyphosate application from National Institute of Agricultural Technology (INTA, EEA Marcos Juarez, Argentina). Glyphosate of commercial formulation (74.7%) was used and the following treatments were evaluated: Soil without glyphosate (control), and Soil with doses equivalent to 1.12 and 11.2 kg ai ha-1. Microbiological parameters were estimated at 3, 7, 14 and 21 days after herbicide application by counting heterotrophic, cellulolytic, nitrogen fixing (N), and nitrifying bacteria; and fluorescein diacetate hydrolysis (FDA), microbial respiration (MR) and microbial biomass (C-BM). The N cycle related bacteria showed greater sensitivity to glyphosate with significant increases in abundance. On the other hand the C cycle parameters were strongly conditioned by the time elapsed since the application of the herbicide, as did the MR. The FDA declined with the highest dose, while the C-BM was not affected. Therefore, we conclude that in the studied experimental conditions glyphosate stimulated bacterial growth (i.e. target abundances) representing a source of N, C and nutrients. On the other hand, enzymatic activity (FDA) decreased when glyphosate was applied in the highest dose, whereas, it had no effect on the MR nor C-BM, which could be attributable to the organic matter content of the soil. However, future research in field conditions is necessary, for

  8. A resilient, robust and active managing of a nuclear crisis is essential for the EDF group

    International Nuclear Information System (INIS)

    Delamare, V.

    2016-01-01

    As a producer, a transmission and a dispatcher company of electricity, the EDF group has to face technological and industrial risks. The EDF group has set up a robust organisation for managing nuclear crisis. As soon as an incident appears in a nuclear power plant the PUI is triggered, this emergency plan allows the mobilization of humane and equipment means necessary to bring back the plant to a safe state. Between 60 and 80 people on duty have to join back their post in less than one hour. The crisis is also managed at a national scale by the activation of 4 crisis cells situated in Paris: the operational cell that will bring extra humane and equipment means to the damaged facility if necessary, the communication cell dedicated to the information of the media, the strategic cell that will supervise the consequences of the incident in terms of technological, legal, financial or societal impacts and the anticipation cell that will be able to analyse the response to the crisis in a critical way making suggestions for the future. (A.C.)

  9. Activity of CERN and LNF groups on large area GEM detectors

    Energy Technology Data Exchange (ETDEWEB)

    Alfonsi, M. [CERN, Geneva (Switzerland); Bencivenni, G. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Brock, I. [Physikalisches Institute der Universitat Bonn, Bonn (Germany); Cerioni, S. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Croci, G.; David, E. [CERN, Geneva (Switzerland); De Lucia, E. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); De Oliveira, R. [CERN, Geneva (Switzerland); De Robertis, G. [Sezione INFN di Bari, Bari (Italy); Domenici, D., E-mail: Danilo.Domenici@lnf.infn.i [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Duarte Pinto, S. [CERN, Geneva (Switzerland); Felici, G.; Gatta, M.; Jacewicz, M. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Loddo, F. [Sezione INFN di Bari, Bari (Italy); Morello, G. [Dipeartimento di Fisica Universita della Calabria e INFN, Cosenza (Italy); Pistilli, M. [Laboratori Nazionali di Frascati dell' INFN, Frascati (Italy); Ranieri, A. [Sezione INFN di Bari, Bari (Italy); Ropelewski, L. [CERN, Geneva (Switzerland); Sauli, F. [TERA Foundation, Novara (Italy)

    2010-05-21

    We report on the activity of CERN and INFN-LNF groups on the development of large area GEM detectors. The two groups work together within the RD51 Collaboration, to aim at the development of Micro-pattern Gas detectors technologies. The vast request for large area foils by the GEM community has driven a change in the manufacturing procedure by the TS-DEM-PMT laboratory, needed to overcome the previous size limitation of 450x450mm{sup 2}. Now a single-mask technology is used allowing foils to be made as large as 450x2000mm{sup 2}. The limitation in the short size, due to the definite width of the raw material, can be overcome by splicing more foils together. A 10x10cm{sup 2} GEM detector with the new single-mask foil has been tested with X-rays and the results are shown. Possible future applications for large area GEM are the TOTEM experiment upgrade at CERN, and the KLOE-2 experiment at the Dafne {Phi}-factory in Frascati.

  10. Activity of CERN and LNF groups on large area GEM detectors

    International Nuclear Information System (INIS)

    Alfonsi, M.; Bencivenni, G.; Brock, I.; Cerioni, S.; Croci, G.; David, E.; De Lucia, E.; De Oliveira, R.; De Robertis, G.; Domenici, D.; Duarte Pinto, S.; Felici, G.; Gatta, M.; Jacewicz, M.; Loddo, F.; Morello, G.; Pistilli, M.; Ranieri, A.; Ropelewski, L.; Sauli, F.

    2010-01-01

    We report on the activity of CERN and INFN-LNF groups on the development of large area GEM detectors. The two groups work together within the RD51 Collaboration, to aim at the development of Micro-pattern Gas detectors technologies. The vast request for large area foils by the GEM community has driven a change in the manufacturing procedure by the TS-DEM-PMT laboratory, needed to overcome the previous size limitation of 450x450mm 2 . Now a single-mask technology is used allowing foils to be made as large as 450x2000mm 2 . The limitation in the short size, due to the definite width of the raw material, can be overcome by splicing more foils together. A 10x10cm 2 GEM detector with the new single-mask foil has been tested with X-rays and the results are shown. Possible future applications for large area GEM are the TOTEM experiment upgrade at CERN, and the KLOE-2 experiment at the Dafne Φ-factory in Frascati.

  11. Using Small Group Debates to Actively Engage Students in an Introductory Microbiology Course†

    Science.gov (United States)

    Shaw, Joyce A.

    2012-01-01

    Debates stimulate critical thinking and can be a highly effective way to actively engage students in the classroom. This paper describes a small group debate format in which groups of four to six students debated preassigned topics in microbiology in front of the rest of the class. Rapid advancements in science, especially in microbiology, provide the scaffolding for students to locate and share evidence-based information from a plethora of complex and often conflicting sources. Student-generated debate presentations can be a welcome respite from the lecture format. Debates were scheduled throughout the course to coincide with topics being covered. Questionnaires distributed immediately after each debate revealed that the debates were well received by students and were effective in changing student attitudes and misconceptions. Debate preparation provided students the opportunity to gain proficiency in accessing information from electronic databases, to use resources from professional organizations, and to synthesize and analyze information. In addition, the debate process gave students experience in developing oral communication skills. PMID:23653803

  12. PERCEPTION STIMULATION GROUP ACTIVITY THERAPY INCREASES E CHILDREN SELF ESTEEM AT PRISON

    Directory of Open Access Journals (Sweden)

    Ah. Yusuf

    2017-07-01

    Full Text Available Introduction: Prison is societal implementer unit which accommodate care and develop the delinquent children. It was recorded that 57% of children at Blitar Child Prison undergo some self concept problems such as low self esteem. This was caused by some factors such as society’s stigmatization toward criminals, development pattern and education, and less support from family. If the self esteem problem is not being overcome soon, the children may  fell useless, disable to control their self and recrime when they are back to society. The objective of this study was to analyze the influence of  GAT (Group Activity Therapy perception stimulation in increasing the children  self esteem at prison. Method:  A quasy experimental pre post control design was used in this study. Samples were recruited by using total sampling and there were 22 samples as on inclusion criteria. The independent variable was GAT perception stimulation and the dependent variable was increasing self esteem of these childen. Data were collected by using questionnare and analyzed by using Wilcoxon Signed Ranks Test and Mann Whitney U Test with the significance level α≤0.05.Result:  The result showed that controlled group has significance level was p=0.654, it is mean there was no self esteem change before and after GAT perception stimulation was given. Whereas treatment group has significance level was p=0.001, it revealed that  there was self esteem change before and after GAT perception stimulation was given. The result of Mann Whitney U Test showed p=0.000 which means was accepted. Discussion: It can be concluded that perception stimulation can increase the children self esteem at prison. Further studies are recommended to study the effect of GAT perception stimulation modified by skill therapy in increasing children self esteem in prison.

  13. Novel bacterial gas sensor proteins with transition metal-containing prosthetic groups as active sites.

    Science.gov (United States)

    Aono, Shigetoshi

    2012-04-01

    Gas molecules function as signaling molecules in many biological regulatory systems responsible for transcription, chemotaxis, and other complex physiological processes. Gas sensor proteins play a crucial role in regulating such biological systems in response to gas molecules. New sensor proteins that sense oxygen or nitric oxide have recently been found, and they have been characterized by X-ray crystallographic and/or spectroscopic analysis. It has become clear that the interaction between a prosthetic group and gas molecules triggers dynamic structural changes in the protein backbone when a gas sensor protein senses gas molecules. Gas sensor proteins employ novel mechanisms to trigger conformational changes in the presence of a gas. In gas sensor proteins that have iron-sulfur clusters as active sites, the iron-sulfur clusters undergo structural changes, which trigger a conformational change. Heme-based gas sensor proteins reconstruct hydrogen-bonding networks around the heme and heme-bound ligand. Gas sensor proteins have two functional states, on and off, which are active and inactive, respectively, for subsequent signal transduction in response to their physiological effector molecules. To fully understand the structure-function relationships of gas sensor proteins, it is vital to perform X-ray crystal structure analyses of full-length proteins in both the on and off states.

  14. Activity targets for nanostructured platinum-group-metal-free catalysts in hydroxide exchange membrane fuel cells

    Science.gov (United States)

    Setzler, Brian P.; Zhuang, Zhongbin; Wittkopf, Jarrid A.; Yan, Yushan

    2016-12-01

    Fuel cells are the zero-emission automotive power source that best preserves the advantages of gasoline automobiles: low upfront cost, long driving range and fast refuelling. To make fuel-cell cars a reality, the US Department of Energy has set a fuel cell system cost target of US$30 kW-1 in the long-term, which equates to US$2,400 per vehicle, excluding several major powertrain components (in comparison, a basic, but complete, internal combustion engine system costs approximately US$3,000). To date, most research for automotive applications has focused on proton exchange membrane fuel cells (PEMFCs), because these systems have demonstrated the highest power density. Recently, however, an alternative technology, hydroxide exchange membrane fuel cells (HEMFCs), has gained significant attention, because of the possibility to use stable platinum-group-metal-free catalysts, with inherent, long-term cost advantages. In this Perspective, we discuss the cost profile of PEMFCs and the advantages offered by HEMFCs. In particular, we discuss catalyst development needs for HEMFCs and set catalyst activity targets to achieve performance parity with state-of-the-art automotive PEMFCs. Meeting these targets requires careful optimization of nanostructures to pack high surface areas into a small volume, while maintaining high area-specific activity and favourable pore-transport properties.

  15. Group B streptococcus activates transcriptomic pathways related to premature birth in human extraplacental membranes in vitro.

    Science.gov (United States)

    Park, Hae-Ryung; Harris, Sean M; Boldenow, Erica; McEachin, Richard C; Sartor, Maureen; Chames, Mark; Loch-Caruso, Rita

    2018-03-01

    Streptococcus agalactiae (group B streptococcus [GBS]) infection in pregnant women is the leading cause of infectious neonatal morbidity and mortality in the United States. Although inflammation during infection has been associated with preterm birth, the contribution of GBS to preterm birth is less certain. Moreover, the early mechanisms by which GBS interacts with the gestational tissue to affect adverse pregnancy outcomes are poorly understood. We hypothesized that short-term GBS inoculation activates pathways related to inflammation and premature birth in human extraplacental membranes. We tested this hypothesis using GBS-inoculated human extraplacental membranes in vitro. In agreement with our hypothesis, a microarray-based transcriptomics analysis of gene expression changes in GBS-inoculated membranes revealed that GBS activated pathways related to inflammation and preterm birth with significant gene expression changes occurring as early as 4 h postinoculation. In addition, pathways related to DNA replication and repair were downregulated with GBS treatment. Conclusions based on our transcriptomics data were further supported by responses of prostaglandin E2 (PGE2), and matrix metalloproteinases 1 (MMP1) and 3 (MMP3), all of which are known to be involved in parturition and premature rupture of membranes. These results support our initial hypothesis and provide new information on molecular targets of GBS infection in human extraplacental membranes.

  16. Group fitness activities for the elderly: an innovative approach to reduce falls and injuries.

    Science.gov (United States)

    Bianco, Antonino; Patti, Antonino; Bellafiore, Marianna; Battaglia, Giuseppe; Sahin, Fatma Nese; Paoli, Antonio; Cataldo, Maria Concetta; Mammina, Caterina; Palma, Antonio

    2014-04-01

    The aim of this study was to examine the opportunity to adopt, for the elderly, already validated function ability tests to better understand how to prevent falls and injuries and to better plan group fitness activities like ballroom dance classes (e.g., Valzer, Polka, Mazurka). A cross-sectional study was conducted. The Berg Balance Scale (BBS) and the Barthel Index (BI) were administered and the occurrence of falls during the previous 2 years was evaluated by anamnesis. One hundred and twenty-two elderly subjects living in Palermo city participated to the study. According to the anamnesis, subjects were divided into two groups: experimental group (EG) and control group (CG). The EG consisted of 75 subjects attending classes of ballroom dancing (73.0 ± 5.6 years 26.1 ± 3.9 BMI), while the CG included 47 volunteers (74.3 ± 5.4 years, 26.8 ± 4.4 BMI). A threshold of 70 % for both scales (BBS-70 and BI-70 %) was set, according to the aims of the study. STATISTICA software was adopted to perform an unpaired t test. A P value lower than 0.05 was considered to be statistically relevant. The BI and BBS of CG were 76.7 ± 33.08 and 30.9 ± 14.9, respectively, while the BI and BBS of EG were 98.1 ± 6.9 and 50.5 ± 54. In EG the BBS-70 % showed 96.0 % of cases compared to 27.6 % of the CG. The BI showed a similar trend to BBS. In EG the BI-70 % showed 98.6 % of cases, while the BI-70 % of CG showed 70.2 % of cases. Moreover, only 36.0 % of EG reported falls previously, while CG reported 53.2 % of falls during the same period of time. The BBS seems to be a valid and reliable tool able to be adopted also by professionals of the ballroom dancing sector (e.g., Valzer, Polka and Mazurka classes). Instructors may evaluate the functional ability of their attendees through BBS to easily obtain more information and better plan ballroom dance classes. Moreover, we highlight that these conclusions need to be supported by other studies with different

  17. Comparing of goal setting strategy with group education method to increase physical activity level: A randomized trial.

    Science.gov (United States)

    Jiryaee, Nasrin; Siadat, Zahra Dana; Zamani, Ahmadreza; Taleban, Roya

    2015-10-01

    Designing an intervention to increase physical activity is important to be based on the health care settings resources and be acceptable by the subject group. This study was designed to assess and compare the effect of the goal setting strategy with a group education method on increasing the physical activity of mothers of children aged 1 to 5. Mothers who had at least one child of 1-5 years were randomized into two groups. The effect of 1) goal-setting strategy and 2) group education method on increasing physical activity was assessed and compared 1 month and 3 months after the intervention. Also, the weight, height, body mass index (BMI), waist and hip circumference, and well-being were compared between the two groups before and after the intervention. Physical activity level increased significantly after the intervention in the goal-setting group and it was significantly different between the two groups after intervention (P goal-setting group after the intervention. In the group education method, only the well-being score improved significantly (P goal-setting strategy to boost physical activity, improving the state of well-being and decreasing BMI, waist, and hip circumference.

  18. Comparing of goal setting strategy with group education method to increase physical activity level: A randomized trial

    Directory of Open Access Journals (Sweden)

    Nasrin Jiryaee

    2015-01-01

    Full Text Available Background: Designing an intervention to increase physical activity is important to be based on the health care settings resources and be acceptable by the subject group. This study was designed to assess and compare the effect of the goal setting strategy with a group education method on increasing the physical activity of mothers of children aged 1 to 5. Materials and Methods: Mothers who had at least one child of 1-5 years were randomized into two groups. The effect of 1 goal-setting strategy and 2 group education method on increasing physical activity was assessed and compared 1 month and 3 months after the intervention. Also, the weight, height, body mass index (BMI, waist and hip circumference, and well-being were compared between the two groups before and after the intervention. Results: Physical activity level increased significantly after the intervention in the goal-setting group and it was significantly different between the two groups after intervention (P < 0.05. BMI, waist circumference, hip circumference, and well-being score were significantly different in the goal-setting group after the intervention. In the group education method, only the well-being score improved significantly (P < 0.05. Conclusion: Our study presented the effects of using the goal-setting strategy to boost physical activity, improving the state of well-being and decreasing BMI, waist, and hip circumference.

  19. The impact of an online Facebook support group for people with multiple sclerosis on non-active users

    Directory of Open Access Journals (Sweden)

    Jacqui Steadman

    2014-11-01

    Objectives: This study therefore aimed to explore the experiences of non-active users of an online Facebook support group for PwMS. Emphasis was placed on the facilitators and the barriers that were associated with membership to this group. Method: An exploratory qualitative research design was implemented, whereby thematic analysis was utilised to examine the ten semi-structured interviews that were conducted. Results: Several facilitators were acquired through the online support group; namely emotional support (constant source of support, exposure to negative aspects of the disease,informational support (group as a source of knowledge, quality of information and social companionship (place of belonging. Some barriers were also identified; namely emotional support (emotions lost online, response to messages, exposure to negative aspects of the disease, informational support (information posted on the group, misuse of group and social companionship (non-active status. Conclusion: These findings demonstrate that the non-active members of the online support group for PwMS have valid reasons for their non-active membership status. More important,the findings suggest that the online Facebook support group provided the group members with an important support network in the form of emotional support, informational support and social companionship, despite their non-active membership status or the barriers that have been identified.

  20. Principal working group No. 1 on operating experience and human factors (PWG1). Report of the task group on reviewing the activities

    International Nuclear Information System (INIS)

    2001-02-01

    A Task Group was formed by PWG-1 in the latter part of 1999 to review the mandate of PWG1 in light of new directions and assignments from CSNI, and to prepare a report that suggests future directions of the Working Group, in harmony with directions from CSNI. This report is the response of the Task Group. Principal Working Group no.1 was organized in September 1982. The group formed its charter, which included: - reviewing periodically activities for the collection, dissemination, storage and analysis of incidents reported under the IRS; - examining annually the incidents reported during the previous year in order to select issues (either technical or human-factor-oriented) with major safety significance and report them to CSNI; - encouraging feed-back through CSNI of lessons derived from operating experience to nuclear safety research programmes, including human factors studies; - providing a forum to exchange information in the field of human factors studies; - establishing short-term task forces, when necessary to carry out information exchange, special studies or any other work within its mandate; - making recommendations to CSNI for improving and encouraging these activities. The mandate of the working group was systematically re-examined in 1994. The purpose was to determine whether changes since the formation of the original mandate would indicate some need to refocus the directions of the working group. It was concluded that the main line of work (sometimes called the core business) of PWG1, which was shown to be an efficient tool for exchanging safety-significant operating experience and lessons learned from safety-significant issues, remained as valid and necessary in 1994 as it was in 1982. Some recommendations for improvement of efficiency were made, but the core business was unchanged. Very little of the mandate needed modification. With little change over nearly 20 years, these six items have constituted the mandate of PWG1. There have been twenty

  1. The impact of an online Facebook support group for people with multiple sclerosis on non-active users.

    Science.gov (United States)

    Steadman, Jacqui; Pretorius, Chrisma

    2014-01-01

    Multiple sclerosis (MS) is a debilitating disease and there is little research on support networks for people with MS (PwMS). More specifically, most studies on online support groups focus on those who actively participate in the group, whereas the majority of those who utilise online support groups do so in a passive way. This study therefore aimed to explore the experiences of non-active users of an online Facebook support group for PwMS. Emphasis was placed on the facilitators and the barriers that were associated with membership to this group. An exploratory qualitative research design was implemented, whereby thematic analysis was utilised to examine the ten semi-structured interviews that were conducted. Several facilitators were acquired through the online support group; namely emotional support (constant source of support, exposure to negative aspects of the disease), informational support (group as a source of knowledge, quality of information) and social companionship (place of belonging). Some barriers were also identified; namely emotional support (emotions lost online, response to messages, exposure to negative aspects of the disease), informational support (information posted on the group, misuse of group) and social companionship (non-active status). These findings demonstrate that the non-active members of the online support group for PwMS have valid reasons for their non-active membership status. More important, the findings suggest that the online Facebook support group provided the group members with an important support network in the form of emotional support, informational support and social companionship, despite their non-active membership status or the barriers that have been identified.

  2. Does chess instruction improve mathematical problem-solving ability? Two experimental studies with an active control group.

    Science.gov (United States)

    Sala, Giovanni; Gobet, Fernand

    2017-12-01

    It has been proposed that playing chess enables children to improve their ability in mathematics. These claims have been recently evaluated in a meta-analysis (Sala & Gobet, 2016, Educational Research Review, 18, 46-57), which indicated a significant effect in favor of the groups playing chess. However, the meta-analysis also showed that most of the reviewed studies used a poor experimental design (in particular, they lacked an active control group). We ran two experiments that used a three-group design including both an active and a passive control group, with a focus on mathematical ability. In the first experiment (N = 233), a group of third and fourth graders was taught chess for 25 hours and tested on mathematical problem-solving tasks. Participants also filled in a questionnaire assessing their meta-cognitive ability for mathematics problems. The group playing chess was compared to an active control group (playing checkers) and a passive control group. The three groups showed no statistically significant difference in mathematical problem-solving or metacognitive abilities in the posttest. The second experiment (N = 52) broadly used the same design, but the Oriental game of Go replaced checkers in the active control group. While the chess-treated group and the passive control group slightly outperformed the active control group with mathematical problem solving, the differences were not statistically significant. No differences were found with respect to metacognitive ability. These results suggest that the effects (if any) of chess instruction, when rigorously tested, are modest and that such interventions should not replace the traditional curriculum in mathematics.

  3. The effects on mental health of group coaching following a physical activity intervention for women undergoing menopause

    DEFF Research Database (Denmark)

    Elsborg, Peter; Andersen, Vinnie; Stelter, Reinhard

    2018-01-01

    ). In both cases the participants were randomized into a group coaching group or a waiting control group. Effects of the intervention were tested with repeated measures mixed MANOVA. No effect on exercise continuation was observed. However the results of this study showed that group coaching (GC) over...... and participants experience relapse. The aim of this study was to investigate a group coaching interventions effects, as a standalone intervention and as an add-on to a physical activity intervention, on exercise maintenance, stress, anxiety and depression. Stress and recovery questionnaire, hospital anxiety...... depression scale and exercise participation was administered before, after a 3 months group coaching intervention as well as at 3 months follow-up. The participants were menopausal women coming from a physical activity intervention (n=56), and a group recruited via an advertisement in a newspaper (n=44...

  4. A Test of the Active-Day Fraction Method of Sunspot Group Number Calibration: Dependence on the Level of Solar Activity

    Science.gov (United States)

    Willamo, T.; Usoskin, I. G.; Kovaltsov, G. A.

    2018-04-01

    The method of active-day fraction (ADF) was proposed recently to calibrate different solar observers to standard observational conditions. The result of the calibration may depend on the overall level of solar activity during the observational period. This dependency is studied quantitatively using data of the Royal Greenwich Observatory by formally calibrating synthetic pseudo-observers to the full reference dataset. It is shown that the sunspot group number is precisely estimated by the ADF method for periods of moderate activity, may be slightly underestimated by 0.5 - 1.5 groups ({≤} 10%) for strong and very strong activity, and is strongly overestimated by up to 2.5 groups ({≤} 30%) for weak-to-moderate activity. The ADF method becomes inapplicable for the periods of grand minima of activity. In general, the ADF method tends to overestimate the overall level of activity and to reduce the long-term trends.

  5. Promoting healthy diets and active lives to hard-to-reach groups: market research study.

    Science.gov (United States)

    White, S L; Maloney, S K

    1990-01-01

    Continued progress over the next decade in reducing premature morbidity and mortality from chronic disease will require that health communication efforts target a significant proportion of the American public that has not been influenced by the health promotion efforts of the 1980s. Focus groups conducted with members of the hard-to-reach American public showed that while being healthy seemed to be important to participants, and they were generally aware of what to do to stay healthy, they had a different operational definition of health than that used in health promotion programs. Participants seemed to believe that better health behaviors would build their resistance to acute illnesses, that is, keep them healthy, but that chronic diseases, such as cancer and diabetes, were due to fate and heredity and beyond their individual control. The focus group results show that participants had not made the link between chronic disease prevention and the importance of diet, exercise, and weight control. Although most of them seemed to express a genuine interest in "doing better," they were not able to supply more than superficial examples of how such changes might be made. Surprisingly, there were more similarities than differences in participants' attitudes and beliefs, with the similarities cutting across boundaries of race-ethnicity, age, and sex. Interest in changing behaviors was only slightly more pronounced among female rather than male, and older rather than younger, participants. However, there was not much evidence from the participants that they were actively seeking health information or trying to reconcile conflicting knowledge and beliefs.

  6. Present status of research activities conducted by research group for heavy elements microbiology in JAERI

    International Nuclear Information System (INIS)

    Ohnuki, Toshihiko; Ozaki, Takuo; Yoshida, Takahiro

    2004-01-01

    It has been recognized that microbial transformations of radionuclides and toxic metals could be significant in the environment, but there is a paucity of information on the mechanisms of biotransformation of radionuclides by the microorganisms. An understanding at the fundamental level the mechanisms of mobilization, immobilization and bioavailability of radioactive elements in particular the actinides is important from the standpoint of mobility of actinides in the environment, disposal of radioactive wastes in deep geological formation, remediation of contaminated soils and materials, and development of strategies for the long-term stewardship of the contaminated sites. The microbiology research group in Japan Atomic Energy Research Institute (JAERI) is conducting basic scientific research on microbial interactions with actinides. Fundamental research on microbial transformations of actinides include elucidation of the mechanisms of dissolution and precipitation of various chemical forms such as ionic, oxides, organic and inorganic complexes of actinides by aerobic or anaerobic microorganisms under relevant microbial process conditions. State-of-the-art analytical techniques are used to determine the interaction of actinides with microorganisms at the molecular level to understand the structure function relationship. These techniques include time-resolved laser fluorescence spectroscopy (TRLFS) to determine the coordination number, oxidation states and the nearest neighbor by X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) at the Synchrotron Light Source, identification of functional groups by nuclear magnetic resonance (NMR), determination of chemical forms by transmission electron microscopy (TEM), and genomic (DNA) manipulation by molecular techniques. We here report the present status of our research activities on accumulation of lanthanides(III) by microorganisms, application of micro-particle induced X

  7. Quantification of functional groups and modeling of their ionization behavior in the active layer of FT30 reverse osmosis membrane.

    Science.gov (United States)

    Coronell, Orlando; Mariñas, Benito J; Zhang, Xijing; Cahill, David G

    2008-07-15

    A new experimental approach was developed to measure the concentration of charged functional groups (FGs) in the active layer of thin-film composite reverse osmosis (RO) and nanofiltration (NF) membranes as a function of solution pH. FT30 RO membrane, with a fully aromatic polyamide (PA) active layer sandwiched between a polysulfone support and a coating layer, was used. The experiments consisted of saturating charged FGs with heavy ion probes, and determining the ion probe concentration by Rutherford backscattering spectrometry (RBS). Deprotonated carboxylic groups were saturated with Ag+, and protonated amine groups with W04(2-). The ionization behavior of carboxylic and amine groups was modeled based on acid-base equilibrium theory. While the ionization behavior of amine groups was satisfactorily described by one dissociation constant (pKa = 4.74), two pKa values (5.23 and 8.97) were necessary to describe the titration curve of carboxylic groups. These results were consistent with the bimodal pore size distribution (PSD) of FT30 active layer reported in the literature. The calculated total concentrations of carboxylic and amine groups in the active layer of the FT30 RO membrane studied were 0.432 and 0.036 M, respectively, and the isoelectric point (IEP) was 4.7. The total concentration of carboxylic and amine groups revealed that the degree of cross-linking of the PA active layer of the FT30 RO membrane studied was 94%.

  8. Diseño de un estado financiero de propósito especial – ambiental, aplicado al sector de la industria de los lácteos en la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Gerardo Mogollon Pita

    2007-07-01

    Full Text Available Para realizar la presente investigación se estudiaron cinco empresas del sector lácteo ubicadas en la Sabana de Bogotá, porque su proceso productivo y comercial tiene gran incidencia sobre el medio ambiente. A dichas empresas se les analizó el proceso productivo y los estados financieros con el ánimo de detectar qué cuentas están relacionadas con aspectos medioambientales, con el fin de incluirlas dentro del estado financiero propuesto. Para la construcción del estado financiero de propósito especial-ambiental, se tuvo en cuenta la estructura del Plan Único de Cuentas para comerciantes, establecido mediante el decreto 2650/93, así mismo se siguieron las recomendaciones sobre información ambiental de la Unión Europea. El Estado financiero de propósito especial – ambiental, permitirá conocer de manera clara y sencilla cuáles han sido las inversiones, los ingresos, los costos y los gastos del ente económico en un período dado. Así mismo se podrá conocer la estructura patrimonial medioambiental puesto que en él se verán reflejados los activos, pasivos y patrimonio que la compañía tiene comprometidos con el medio ambiente.

  9. Proceso de sensibilización y empoderamiento local frente al uso sostenible del suelo en la microcuenca El Limón, cuencas altas Sabana Yegua, República Dominicana

    Directory of Open Access Journals (Sweden)

    Maldané Cuello Espinosa

    2011-05-01

    Full Text Available Este artículo trata el desarrollo de un proceso de sensibilización y empoderamiento por parte de los productores y productoras agrícolas de la microcuenca El Limón, dentro del complejo de cuencas que alimentan a la presa Sabana Yegua, en República Dominicana. La metodología implementada en el proceso se basa en un enfoque participativo local, que a su vez está basado en el modelo de Acción Ambiental Positiva (AAP, el cual incluye los elementos de habilidades y procedimientos, conceptos, empoderamiento y actitudes. En el escrito se presenta la aplicación de este enfoque y los productos obtenidos del proceso de sensibilización y empoderamiento. Dentro de los resultados se incluye la adopción de prácticas sostenibles del recurso suelo, donde se desarrollan prácticas de conservación, con el fin de reducir la degradación a la que está expuesto el mencionado recurso. El objetivo es que los productores logren interiorizar y experimentar la importancia de proteger el suelo en términos económicos y ambientales.

  10. Plan de actividades físico-recreativas para la ocupación del tiempo libre en los adolescentes de 15 a 18 años del Municipio Carirubana en el Consejo Comunal Sabana Grande

    Directory of Open Access Journals (Sweden)

    Yamila Sánchez Bello

    2011-12-01

    Full Text Available El presente trabajo tiene como base el estudio acerca de la ocupación del tiempo libre, por su positiva influencia en la formación de la personalidad del hombre manifestada en su modo de vida al cambiar hábitos, ideología y cultura social de cómo ocuparlo. Consta de tres capítulos que van desde, las concepciones del tiempo libre y la recreación el primero sobre, la caracterización del grupo, la comunidad y resultados del diagnóstico inicial, donde se constata cuál es el tiempo libre que disponen los adolescentes y la poca sistematicidad en actividades, al aplicar de los métodos teóricos y empíricos en el segundo, y un tercer capítulo donde se realiza la fundamentación del plan de actividades físico-recreativa para ocupar el tiempo libre de los adolescentes y al final se analizan los resultados obtenido tras su puesta en marcha. Las actividades van acompañadas de acciones encaminadas a transformar conductas desacordes al buen desarrollo humano, para este propósito se escogieron un grupo de adolescentes en edades entre 15-18 años del municipio Carirubana en el Consejo Comunal Sabana Grande. El plan tuvo como base la aplicación de los conceptos: Tiempo libre, comunidad, adolescente.

  11. Identification of an active ID-like group of SINEs in the mouse.

    Science.gov (United States)

    Kass, David H; Jamison, Nicole

    2007-09-01

    The mouse genome consists of five known families of SINEs: B1, B2, B4/RSINE, ID, and MIR. Using RT-PCR we identified a germ-line transcript that demonstrates 92.7% sequence identity to ID (excluding primer sequence), yet a BLAST search identified numerous matches of 100% sequence identity. We analyzed four of these elements for their presence in orthologous genes in strains and subspecies of Mus musculus as well as other species of Mus using a PCR-based assay. All four analyzed elements were identified either only in M. musculus or exclusively in both M. musculus and M. domesticus, indicative of recent integrations. In conjunction with the identification of transcripts, we present an active ID-like group of elements that is not derived from the proposed BC1 master gene of ID elements. A BLAST of the rat genome indicated that these elements were not in the rat. Therefore, this family of SINEs has recently evolved, and since it has thus far been observed mainly in M. musculus, we refer to this family as MMIDL.

  12. Antimicrobial Activity of Allicin against Colonizing Group B Streptococci Isolated from Pregnant Women in Ardabil, Iran

    Directory of Open Access Journals (Sweden)

    Elham Jannati

    2014-06-01

    Full Text Available Background and Objectives: Group B streptococci (GBS are the major cause of neonatal and maternal infections. They are susceptible to penicillin, ampicillin and first-generation cephalosporins. However, resistance to other antibiotics such as erythromycin and clindamycin is common among GBS strains. The aim of this study was to evaluate the antimicrobial activity of allicin against colonizing GBS strains in vitro.   Methods: Garlic extract was prepared and allicin was purified using semi-preparative HPLC procedure. Minimum inhibitory concentration (MIC and minimum bactericidal concentration (MBC of allicin were determined for 52 GBS strains using microdilution method in Todd Hewitt broth medium.   Results: MIC of allicin was 64-128 µg/mL (MIC90 = 128 and MBC of allicin was 128 to 512µg/mL (MBC90 = 256 for GBS strains.   Conclusion: The results of this study showed that allicin can inhibit growth of GBS in vitro. Further studies on allicin might be worthy of evaluation as a therapeutic agent in treatment of GBS infections.

  13. Representations of happiness and life satisfaction in the group of educated and socially active young people

    Directory of Open Access Journals (Sweden)

    Kokurina, Irina G.

    2014-03-01

    Full Text Available The paper examines the differences in the social representations of happiness among optimists and pessimists in the group of socially active, educated young members of the international youth organization Association Internationale des Etudiants en Sciences Economiques et Commerciales . To assess the degree of optimism and pessimism we used the Satisfaction With Life Scale (SWLS developed by E. Diener, while social representation, divided into the nucleus and peripheral zones, were examined using Verges’ technique within the framework of the concept of social mindsets offered by S. Moskovichi. It has been shown that, irrespective of the optimism or pessimism of the participants, the nucleus of their representations of happiness contains such a value as love. However, only in optimists’ representations is this value combined in the nucleus with the values of family and friendship. In the pessimists’ nucleus zone of the representation of happiness, love is presented as an independent value, primarily associated with striking emotional experiences, which has aspects of psychological addiction. Considerable differences between optimists and pessimists have also been found in the peripheral zone of the representation of happiness. Only optimists have such associations as “knowledge”, “children”, and “faith” in their peripheral area. In our opinion, the major scale of differences between optimists and pessimists is formed by the factor of sociocentricity and egocentricity.

  14. Effectiveness of group-mediated lifestyle physical activity (glpa) program for health benefit in physical activity among elderly people at rural thailand

    International Nuclear Information System (INIS)

    Ethisan, P.; Chapman, R.

    2015-01-01

    Elderly population is considered as a vulnerable group and prone to develop multiple medical problems. This aging population is rapidly increasing in developing countries especially in Thailand. Methods: This study was a quasi-experimental study to evaluate the effectiveness of Group-Mediated Lifestyle Physical Activity program on change health benefit in physical activity among elderly people by using validated and reliable Global Physical Activity Questionnaire-GPAQv2. The study was conducted in Phranakhonsiayutthaya district, Ayutthaya province due to its population being the second highest elderly in the Central Region of Thailand. A total of 102 persons of age 60 and over who could read and write Thai language were selected purposively. However, 52 elderly were enrolled in the intervention group and 50 were enrolled for the control group. General Linear Model repeated-measures ANOVA was used to evaluate the effects of Group-Mediated Lifestyle Physical Activity (GLPA) program on change health benefit in physical activity among elderly. Results: Overall health benefit at baseline were similar between intervention and control group and found statistically non-significant with p-value 0.638 (>0.05). However, the mean score of health benefit was 23.21 ± 29.23 in intervention group and 20.74 ± 23.18 in control group. One third of participants of intervention group had not found health benefit due to physical activity while in control group this number was more than half. After elderly received Group-Mediated Lifestyle Physical Activity program intervention for 6 month found significant statistical differences as compared with mean score at baseline (health benefit 6 month, intervention group =40.7 ± 34.28 and control group =4.56 ± 8.79). Conclusion: The effect of Group-Mediated Lifestyle Physical Activity program change intervention was statistically significant in health benefit after intervention program between intervention and control group. Our study

  15. The Parkinson's experience of group physical activity: Understanding social support, social comparison, physical self-perceptions, and posttraumatic growth

    OpenAIRE

    Sheehy, Tammy L

    2014-01-01

    Group physical activity programs for clinical populations can provide opportunities for adaptive social interactions, improving perceptions of competence, and may facilitate posttraumatic growth (positive psychological changes resulting from traumatic life experiences). Therefore, the purpose of this study was to examine how people with Parkinson's experience social interactions and physical challenges in a group physical activity program, and to investigate what role they think those experie...

  16. Senior expert group for the review of the Agency`s programme of activities. Opening remarks by the Director General

    Energy Technology Data Exchange (ETDEWEB)

    ElBaradei, M [International Atomic Energy Agency, Vienna (Austria)

    1998-03-23

    The document reproduces the opening remarks made by the Director General of the IAEA on 23 March 1998 at the first meeting of the Senior Expert Group for the review of the Agency`s programme and activities. The Director General explains his considerations in establishing the group, and the major challenges facing the safe use of nuclear energy and technologies

  17. Senior expert group for the review of the Agency's programme of activities. Opening remarks by the Director General

    International Nuclear Information System (INIS)

    ElBaradei, M.

    1998-01-01

    The document reproduces the opening remarks made by the Director General of the IAEA on 23 March 1998 at the first meeting of the Senior Expert Group for the review of the Agency's programme and activities. The Director General explains his considerations in establishing the group, and the major challenges facing the safe use of nuclear energy and technologies

  18. 76 FR 72997 - Railroad Safety Advisory Committee (RSAC); Working Group Activity Update

    Science.gov (United States)

    2011-11-28

    ... two additional Task Groups to work in the areas of track worthiness and brakes. The Track worthiness... Group includes experts and key stakeholders such as international operators of high-speed equipment, car... regulatory language to the Passenger Safety Working Group at the September 16, 2010, meeting. More work...

  19. 78 FR 75905 - Credit for Increasing Research Activities: Intra-Group Gross Receipts

    Science.gov (United States)

    2013-12-13

    ... the laws of Country. F does not conduct a trade or business within the United States, Puerto Rico, or... trades or businesses under common control (intra-group transactions) for purposes of determining the... will affect controlled groups of corporations or groups of trades or businesses under common control...

  20. Invented Spelling Activities in Small Groups and Early Spelling and Reading

    Science.gov (United States)

    Martins, Margarida Alves; Salvador, Liliana; Albuquerque, Ana; Silva, Cristina

    2016-01-01

    Our aim was to assess the impact of an invented spelling programme conducted in small groups on children's written language acquisition in Portuguese. We expected the experimental group to have better post-test results than the control group in spelling and reading. Participants were 160 preschool-age children who were randomly divided into an…

  1. The effect of skin-to-skin contact at birth, early versus immediate, on the duration of exclusive human lactancy in full-term newborns treated at the Clínica Universidad de La Sabana: study protocol for a randomized clinical trial.

    Science.gov (United States)

    Agudelo, Sergio; Gamboa, Oscar; Rodríguez, Fabio; Cala, Sandra; Gualdrón, Nathalie; Obando, Evelyn; Padrón, María Lucía

    2016-10-26

    Human lactancy is a simple and cost-effective strategy that influences infant and maternal mortality rates. Skin-to-skin contact (SSC) is an immediate postpartum period strategy that has proven to benefit the initiation and continuation of human lactation and to decrease hospitalization during the first week of life. This study aims to determine the effect of SSC initiation at birth (immediate versus early) in healthy, full-term newborns treated at the Universidad de La Sabana Clinic on the duration of exclusive human lactation. A randomized, blind clinical trial will be performed with full-term healthy newborns born at the Universidad de La Sabana Clinic. The blind trial participants will be those persons measuring the results and analyzing the data. The sample size will be calculated for a type I error of 5 %, a two-tailed type II error of 20 %, and an estimated percentage loss of 30 %; 150 infants will be included in each group. Randomization will be performed using permuted, size-6 blocks. Descriptive analysis will be conducted using central tendency and dispersion measurements. A bivariate analysis will be performed to determine which variables are associated with exclusive lactancy at 6 months. For continuous variables, Student's t test will be used for independent samples, and the Wilcoxon rank sum test will be used if the assumptions of normality for the t tests are not fulfilled. The assumption of normality will be evaluated using the Shapiro-Wilk and Kolmogorov-Smirnov tests. Categorical variables in contingency tables will be constructed to assess the independence between variables using the chi-square test, or Fisher's exact test when the assumption of the number of cases is not met by the values in the contingency tables multiplied by two. This will be calculated as a measurement of the effect of relative risk (RR) with confidence intervals; the adjusted measurements will be calculated using a multivariate regression Poisson model. Variables with

  2. Active living : the impact of renovating urban open spaces on increasing the level of physical activity among social groups

    NARCIS (Netherlands)

    Wiggers, Hiske; Shokoohi, Roya

    2017-01-01

    Introduction The provision of active parks/public open space is the key factor in promoting active living, because people and specially low-income and elderlies are being more interested in doing non-organized/informal, and no-cost sports/physical activities in outdoor spaces in recent decades

  3. The Role of Praise and Worship Activities in Spiritual Well-Being: Perceptions of a Pentecostal Youth Ministry Group

    Science.gov (United States)

    Tshabalala, Bhekani G.; Patel, Cynthia J.

    2010-01-01

    The present study explores the role of "praise and worship" activities in the spiritual well-being of a select group of Pentecostal youth. Forty youth members completed an adapted version of the Spiritual Well-being Scale (SWBS) and a questionnaire. In addition to ranking "praise and worship" activities, they were asked about the roles that…

  4. Changes in energy metabolism in relation to physical activity due to fermentable carbohydrates in group housed, growing pigs

    NARCIS (Netherlands)

    Schrama, J.W.; Bakker, G.C.M.

    1999-01-01

    Fermentable nonstarch polysaccharides (dietary fiber) affect energy retention in group-housed growing pigs by reducing physical activity. This study assessed the effects of fermentation and bulkiness of dietary carbohydrates on physical activity in relation to energy metabolism. Eight clusters of 14

  5. Changes in energy metabolism in relation to physical activity due to fermentable carbohydrates in group-housed growing pigs

    NARCIS (Netherlands)

    Schrama, J.W.; Bakker, G.C.M.

    1999-01-01

    Fermentable nonstarch polysaccharides (dietary fiber) affect energy retention in group-housed growing pigs by reducing physical activity. This study assessed the effects of fermentation and bulkiness of dietary carbohydrates on physical activity in relation to energy metabolism. Eight clusters of 14

  6. Predictors of willingness to pay for physical activity of socially vulnerable groups in community-based programs

    NARCIS (Netherlands)

    Herens, M.C.; Ophem, van J.A.C.; Wagemakers, M.A.E.; Koelen, M.A.

    2015-01-01

    Willingness to pay (WTP) is used to assess individuals’ value attribution to health-related quality of life interventions. Little is known about predictors of WTP for sport and physical activity in socially vulnerable groups in communitybased physical activity (CBHEPA) programs. This study addresses

  7. Activities of the task group 8 on thin film PV module reliability (Conference Presentation)

    Science.gov (United States)

    Dhere, Neelkanth G.

    2016-09-01

    Photovoltaic (PV) modules and systems are being used increasingly to provide renewable energy to schools, residences, small businesses and utilities. At this time, the home owners and small businesses have considerable difficulty in detecting module and/or system degradation and especially enforcing warranty. It needs to be noted that IEC 61215-1 (test req.), -2 (test proc.) and -1-1 (c-Si) are forecasted to be circulated end of Feb 2016 and only editorial changes would be possible. 61215 series does include thin film technologies and would be replacing 61646. Moreover, IEC 61215-1, section 7.2 power output and electric circuitry does contain significant changes to acceptance criteria regarding rated label values, particularly rated power. Even though it is believed that consensus could be achieved within IEC TC82 WG2, some of the smaller players that do not participate actively in IEC TC82 - may not be surprised and must be informed. The other tech specific parts 61215-1-2 (CdTe), -1-3 (a-Si, µc-Si) and -1-4 (CIS, CIGS) are out for comments. The IEC closing date was January 29, 2016. The additions alternative damp heat (DH) test proposed Solar Frontier is being reviewed. In the past, only 600 V systems were permitted in the grid-connected residential and commercial systems in the US. The US commercial systems can now use higher voltage (1,000-1500V) in order to reduce BOS component costs. It is believed that there would not be any problems. The Task Group 8 is collecting data on higher voltage systems.

  8. The benefits of in-group contact through physical activity involvement for health and well-being among Korean immigrants

    Science.gov (United States)

    Kim, Junhyoung; Heo, Jinmoo; Kim, Jun

    2014-01-01

    This qualitative study is designed to examine the benefits of physical activity involvement with members of the same ethnic group. For this study, Korean immigrants who were members of Korean physical activity clubs such as badminton and tennis were selected as participants. Using a constructive grounded theory methodology, three themes were identified as benefits of physical activity involvement: (1) the experience of psychological well-being, (2) the creation of a unique cultural world, and (3) the facilitation of physical activity involvement. The findings of this study suggest that Korean immigrant participants gained various social, cultural, and psychological benefits by engaging in activities with other Korean immigrants. PMID:24875239

  9. The benefits of in-group contact through physical activity involvement for health and well-being among Korean immigrants

    Directory of Open Access Journals (Sweden)

    Junhyoung Kim

    2014-05-01

    Full Text Available This qualitative study is designed to examine the benefits of physical activity involvement with members of the same ethnic group. For this study, Korean immigrants who were members of Korean physical activity clubs such as badminton and tennis were selected as participants. Using a constructive grounded theory methodology, three themes were identified as benefits of physical activity involvement: (1 the experience of psychological well-being, (2 the creation of a unique cultural world, and (3 the facilitation of physical activity involvement. The findings of this study suggest that Korean immigrant participants gained various social, cultural, and psychological benefits by engaging in activities with other Korean immigrants.

  10. Synthesis and Anti-HIV-1 Activity of New MKC-442 Analogues with an Alkynyl-Substituted 6-Benzyl Group

    DEFF Research Database (Denmark)

    Aly, Youssef L.; Pedersen, Erik Bjerreg.; La Colla, Paolo

    2007-01-01

    Synthesis and antiviral activities are reported of a series of 6-(3-alkynyl benzyl)-substituted analogues of MKC-442 (6-benzyl-1-(ethoxymethyl)-5-isopropyluracil), a highly potent agent against HIV. The 3-alkynyl group is assumed to give a better stacking of the substituted benzyl group to reverse...... transcriptase (RT) and this was believed to improve antiviral activity against HIV-1. The bromo derivatives, 5-alkyl-6-(3-bromo-benzyl)-1-ethoxymethyl derivatives 7a, b and 5-alkyl-6-(3-bromobenzyl)-1-allyloxymethyl derivatives 9a, b, showed activity against HIV on the same level as their corresponding...

  11. Making a difference: Ten case studies of DSM/IRP interactive efforts and related advocacy group activities

    Energy Technology Data Exchange (ETDEWEB)

    English, M.; Schexnayder, S.; Altman, J. [Tennessee Univ., Knoxville, TN (United States). Energy, Environment and Resources Center; Schweitzer, M. [Oak Ridge National Lab., TN (United States)

    1994-03-01

    This report discusses the activities of organizations that seek to promote integrated resource planning and aggressive, cost-effective demand-side management by utilities. The activities of such groups -- here called energy efficiency advocacy groups (EEAGs) -- are examined in ten detailed am studies. Nine of the cases involve some form of interactive effort between investor-owned electric utilities and non-utility to develop policies, plans, or programs cooperatively. Many but not all of the interactive efforts examined are formal collaboratives. In addition, all ten cases include discussion of other EEAG activities, such as coalition-building, research, participation in statewide energy planning, and intervention in regulatory proceedings.

  12. Analysis of activity of information inquired group on radioecology and public communication in Ozyorsk (the town of nuclear industry)

    International Nuclear Information System (INIS)

    Govyrina, E.

    2001-01-01

    The aim of this report is an analysis of the activity of Information Inquired Group on radioecology and public communication, existed in the town of atomic industry Ozyorsk on the base of production association M ayak . Main tasks and functions of this organization, its management structure, forms of activity are considered in this report. In the report the emphasis is laid on the specification of nuclear branch and problems of the work with the public, connected with it. Conclusions maintain the practical recommendation by the work with the public, made on the experience of the Information Inquired Group's activity, and the results of functioning of the organization during ten years. (author)

  13. Activity budget, diet, and use of space by two groups of squirrel monkeys (Saimiri sciureus) in eastern Amazonia.

    Science.gov (United States)

    Pinheiro, Tatyana; Ferrari, Stephen F; Lopes, Maria Aparecida

    2013-07-01

    Squirrel monkeys (Saimiri spp.) are widely distributed in the Amazon basin. This study describes the ecological and behavioral patterns of two social groups of S. sciureus in forests adjacent to the Tucuruí hydroelectric reservoir in eastern Amazonia, including range size, activity budgets, and composition of the diet. The groups were monitored at Base 4 (group B4) and Germoplasma Island (group GI). Quantitative behavioral data were collected using instantaneous scan sampling to record behavior, substrate use, and height. Home ranges were delimited using a GPS to determine group position after each 50 m of movement. Home ranges were 75.0 ha for group B4 (39 members) and 77.5 ha for group GI (32 members). The use of vertical strata was well defined, with a marked preference for the middle and lower levels of the canopy. The activity budgets of both groups were typical of those of other squirrel monkeys and were dominated by foraging (B4 = 48.7 %; GI = 49.6 %), moving (both groups 28.9 %), and feeding (B4 = 14.6 %; GI = 12.4 %). Resting was rare (B4 = 3.5 %; GI = 2.6 %) and less common than social behavior (B4 = 4.3 %; GI = 6.4 %). The diet of both groups was dominated by plant material (B4 = 70.7 % of feeding records; GI = 71.4 %), which is in contrast with the more insectivorous diets recorded for Saimiri at other sites. Group GI spent more time foraging during the dry season, whereas group B4 spent more time in the rainy season when the consumption of fruit increased (significantly, in the case of group GI). The less insectivorous diet of these groups may be due to a number of factors, including the unique habitat configuration at the site and reduced hydrological stress due to the proximity of the reservoir.

  14. 78 FR 38993 - Agency Information Collection Activities: Proposed Collection; Comment Request; Focus Groups...

    Science.gov (United States)

    2013-06-28

    ... generally conduct further research before making important decisions such as adopting new policies and...' attitudes, beliefs, motivations, and feelings than do quantitative studies. Focus groups serve the narrowly...

  15. Research and Teaching: Instructor Use of Group Active Learning in an Introductory Biology Sequence

    Science.gov (United States)

    Auerbach, Anna Jo; Schussler, Elisabeth E.

    2016-01-01

    Active learning (or learner-centered) pedagogies have been shown to enhance student learning in introductory biology courses. Student collaboration has also been shown to enhance student learning and may be a critical part of effective active learning practices. This study focused on documenting the use of individual active learning and group…

  16. Presentation of the decay data group activities at LPRI. (Links with international evaluation works)

    International Nuclear Information System (INIS)

    Be, M.M.

    1999-01-01

    The activities of the Primary Ionizing Radiation Laboratory (LPRI) which is affiliated with the French National Bureau of Metrology (BNM), include evaluation of decay data, absolute activity measurements, X- and gamma-ray spectrometry, development of new measuring techniques, etc. The following three activities in the field of decay data evaluation are briefly presented: NUCLEIDE software, internal conversion coefficients, and nuclide evaluations

  17. Main Group Element Chemistry in Service of Hydrogen Storage and Activation. Final report

    International Nuclear Information System (INIS)

    Dixon, David A.; Arduengo, Anthony J. III

    2010-01-01

    . This goal was met in terms of reducing the number of costly experiments and helping to focus the experimental effort on the potentially optimal targets. We have used computational chemistry approaches to predict the thermodynamic properties of a wide range of compounds containing boron, nitrogen, hydrogen, and other elements as appropriate including carbon. These calculations were done in most cases with high level molecular orbital theory methods that have small error bars on the order of ± 1 to 2 kcal/mol. The results were used to benchmark more approximate methods such as density functional theory for larger systems and for database development. We predicted reliable thermodynamics for thousands of compounds for release and regeneration schemes to aid/guide materials design and process design and simulation. These are the first reliable computed values for these compounds and for many represent the only available values. Overall, the computational results have provided us with new insights into the chemistry of main group and organic-base chemical hydrogen systems from the release of hydrogen to the regeneration of spent fuel. A number of experimental accomplishments were also made in this project. The experimental work on hydrogen storage materials centered on activated polarized σ- or π-bonded frameworks that hold the potential for ready dihydrogen activation, uptake, and eventually release. To this end, a large number of non-traditional valence systems including carbenes, cyanocarbons, and C-B and and B-N systems were synthesized and examined. During the course of these studies an important lead arose from the novel valency of a class of stable organic singlet bi-radical systems. A synthetic strategy to an 'endless' hydrogen storage polymer has been developed based on our cyanocarbon chemistry. A key issue with the synthetic efforts was being able to link the kinetics of release with the size of the substituents as it was difficult to develop a low molecular

  18. Final Report: Main Group Element Chemistry in Service of Hydrogen Storage and Activation

    Energy Technology Data Exchange (ETDEWEB)

    David A. Dixon; Anthony J. Arduengo, III

    2010-09-30

    goal was met in terms of reducing the number of costly experiments and helping to focus the experimental effort on the potentially optimal targets. We have used computational chemistry approaches to predict the thermodynamic properties of a wide range of compounds containing boron, nitrogen, hydrogen, and other elements as appropriate including carbon. These calculations were done in most cases with high level molecular orbital theory methods that have small error bars on the order of ± 1 to 2 kcal/mol. The results were used to benchmark more approximate methods such as density functional theory for larger systems and for database development. We predicted reliable thermodynamics for thousands of compounds for release and regeneration schemes to aid/guide materials design and process design and simulation. These are the first reliable computed values for these compounds and for many represent the only available values. Overall, the computational results have provided us with new insights into the chemistry of main group and organic-base chemical hydrogen systems from the release of hydrogen to the regeneration of spent fuel. A number of experimental accomplishments were also made in this project. The experimental work on hydrogen storage materials centered on activated polarized σ- or π-bonded frameworks that hold the potential for ready dihydrogen activation, uptake, and eventually release. To this end, a large number of non-traditional valence systems including carbenes, cyanocarbons, and C-B and and B-N systems were synthesized and examined. During the course of these studies an important lead arose from the novel valency of a class of stable organic singlet bi-radical systems. A synthetic strategy to an “endless” hydrogen storage polymer has been developed based on our cyanocarbon chemistry. A key issue with the synthetic efforts was being able to link the kinetics of release with the size of the substituents as it was difficult to develop a low molecular

  19. The influence of friendship groups and media on eating behavior and physical activity in adolescents

    NARCIS (Netherlands)

    Prof Rinie Geenen; MD E.J.M. Wouters

    2012-01-01

    The global epidemic of overweight and obesity results from individual factors and from meso- and macro environmental factors. Adolescents are especially vulnerable to unhealthy changes in life style. One major influence on health behavior in this age group is represented by friends in peer groups.

  20. 75 FR 76070 - Railroad Safety Advisory Committee (RSAC); Working Group Activity Update

    Science.gov (United States)

    2010-12-07

    ... the Passenger Equipment Safety Standards. The Working Group met on September 16, 2010; currently there... ``after arrival mandatory directives,'' among other issues. The Working Group continues to work on after... protecting persons who work on, under, or between rolling equipment and persons applying, removing, or...

  1. Exploratory Talk in the Early Years: Analysing Exploratory Talk in Collaborative Group Activities Involving Younger Learners

    Science.gov (United States)

    Patterson, Eira Wyn

    2018-01-01

    Collaborative group work has the potential for providing rich opportunities for children to learn through talk with peers; however, in practice, little effective engagement in learning is observed within authentic learning contexts. Exploratory talk is associated with high levels of cognitive challenge within collaborative group work. Detailed…

  2. How Do We Index?: A Report of Some Aslib Informatics Group Activity.

    Science.gov (United States)

    Jones, Kevin P.

    1983-01-01

    Results of workshops focusing on the indexing process conducted by Aslib Informatics Group and its predecessor the Co-ordinate Indexing Group are reported, noting seminars held in 1977, 1978, 1980, and 1981. Indexing techniques and subject words chosen for journal articles are appended. (EJS)

  3. Implicaciones de la resolución espacial sobre la estimación de modelos de distribución, evaluación de hábitat y cuotas de aprovechamiento del chigüiro (Hydrochaerus hydrochaeris), en las sabanas inundables de la Orinoquía Colombiana

    OpenAIRE

    Sarmiento Pinzón, Carlos Enrique

    2011-01-01

    Evaluamos diferentes aspectos relativos a la escala espacial que pueden influir sobre la variabilidad, precisión y confiabilidad de los modelos de distribución geográfica (presencia y densidad) del chigüiro en las Sabanas Inundables de la Orinoquía Colombiana. Dichos aspectos abarcan la resolución espacial y cubrimiento geográfico de las variables independientes y de las localidades de presencia y abundancia, así como las posibles implicaciones del uso de imágenes satelitales de diferente re...

  4. Working Memory and Motor Activity: A Comparison Across Attention-Deficit/Hyperactivity Disorder, Generalized Anxiety Disorder, and Healthy Control Groups.

    Science.gov (United States)

    Lea, Sarah E; Matt Alderson, R; Patros, Connor H G; Tarle, Stephanie J; Arrington, Elaine F; Grant, DeMond M

    2018-05-01

    Converging findings from recent research suggest a functional relationship between attention-deficit/hyperactivity disorder (ADHD)-related hyperactivity and demands on working memory (WM) in both children and adults. Excessive motor activity such as restlessness and fidgeting are not pathognomonic symptoms of ADHD, however, and are often associated with other diagnoses such as generalized anxiety disorder (GAD). Further, previous research indicates that anticipatory processing associated with anxiety can directly interfere with storage and rehearsal processes of WM. The topographical similarity of excessive motor activity seen in both ADHD and anxiety disorders, as well as similar WM deficits, may indicate a common relationship between WM deficits and increased motor activity. The relationship between objectively measured motor activity (actigraphy) and PH and visuospatial WM demands in adults with ADHD (n = 21), adults with GAD (n = 21), and healthy control adults (n = 20) was examined. Although all groups exhibited significant increases in activity from control to WM conditions, the ADHD group exhibited a disproportionate increase in activity, while activity exhibited by the GAD and healthy control groups was not different. Findings indicate that ADHD-related hyperactivity is uniquely related to WM demands, and appear to suggest that adults with GAD are no more active relative to healthy control adults during a cognitively demanding laboratory task. Copyright © 2017. Published by Elsevier Ltd.

  5. [Alkaline phosphatase activity in blood group B or O secretors is fluctuated by the dinner intake of previous night].

    Science.gov (United States)

    Matsushita, Makoto; Harajiri, Sanae; Tabata, Shiori; Yukimasa, Nobuyasu; Muramoto, Yoshimi; Komoda, Tsugikazu

    2013-04-01

    We previously reported that two intestinal alkaline phosphatase (IAP) isoforms, high molecular mass IAP (HIAP) and normal molecular mass IAP (NIAP), appear in healthy serum with our Triton-PAGE method for determination of ALP isozymes. In addition, HIAP is chiefly present in blood group B or O secretors, and a large amount of NIAP is secreted into the circulation after high-fat meal in blood group B or O secretors. In the present paper, we investigated the relationship between alkaline phosphatase (ALP) activity in early morning with the patient in a fasted state and the dinner intake of previous night. Two types of dinner were prepared; a low-fat meal (520 kcal), and a high-fat meal (1,040 kcal). Subjects ate the 2 types of dinner on different days. The mean ALP activities at 14 h after high-fat meal ingestion in blood group B or O secretors (n=14) from JSCC and IFCC methods were 8.8% and 5.2% higher than those at 14 h after low-fat meal ingestion in blood group B or O secretors, respectively. The increases in ALP activity between after high-fat meal and low-fat meal were nearly identical to the increases in NIAP activity. These results suggest that a high-fat meal is more likely to affect ALP activity at the early morning with the patient in a fasted state in blood group B or O secretors.

  6. Effects of using nursing home residents to serve as group activity leaders: lessons learned from the RAP project.

    Science.gov (United States)

    Skrajner, Michael J; Haberman, Jessica L; Camp, Cameron J; Tusick, Melanie; Frentiu, Cristina; Gorzelle, Gregg

    2014-03-01

    Previous research has demonstrated that persons with early to moderate stage dementia are capable of leading small group activities for persons with more advanced dementia. In this study, we built upon this previous work by training residents in long-term care facilities to fill the role of group activity leaders using a Resident-Assisted Programming (RAP) training regimen. There were two stages to the program. In the first stage, RAP training was provided by researchers. In the second stage, RAP training was provided to residents by activities staff members of long-term care facilities who had been trained by researchers. We examine the effects of RAP implemented by researchers and by activities staff member on long-term care resident with dementia who took part in these RAP activities. We also examined effects produced by two types of small group activities: two Montessori-based activities and an activity which focuses on persons with more advanced dementia, based on the work of Jitka Zgola. Results demonstrate that levels of positive engagement seen in players during RAP (resident-led activities) were typically higher than those observed during standard activities programming led by site staff. In general, Montessori-Based Dementia Programming® produced more constructive engagement than Zgola-based programming (ZBP), though ZBP did increase a positive form of engagement involving observing activities with interest. In addition, RAP implemented by activities staff members produced effects that were, on the whole, similar to those produced when RAP was implemented by researchers. Implications of these findings for providing meaningful social roles for persons with dementia residing in long-term care, and suggestions for further research in this area, are discussed.

  7. Regional cooperation-activities of the working group on waste management

    International Nuclear Information System (INIS)

    Brooks, G.L.

    1987-01-01

    A Working Group on Waste Management was formally established by the Pacific Basin Nuclear Cooperation Committee at its meeting on November 19, 1986. Co-chairmen are Dr. Kunihiko Uematsu of Japan and the author, Gordon L. Brooks of Canada. Since the Working Group is newly formed, a consensus program has not yet been developed. In lieu of this, the author suggests a series of basic issues and possible areas of future collaboration which could serve as a starting point for the Working Group in developing an appropriate cooperative program. (author)

  8. The ACTIVATE study: results from a group-randomized controlled trial comparing a traditional worksite health promotion program with an activated consumer program.

    Science.gov (United States)

    Terry, Paul E; Fowles, Jinnet Briggs; Xi, Min; Harvey, Lisa

    2011-01-01

    PURPOSE. This study compares a traditional worksite-based health promotion program with an activated consumer program and a control program DESIGN. Group randomized controlled trial with 18-month intervention. SETTING. Two large Midwestern companies. SUBJECTS. Three hundred and twenty employees (51% response). INTERVENTION. The traditional health promotion intervention offered population-level campaigns on physical activity, nutrition, and stress management. The activated consumer intervention included population-level campaigns for evaluating health information, choosing a health benefits plan, and understanding the risks of not taking medications as prescribed. The personal development intervention (control group) offered information on hobbies. The interventions also offered individual-level coaching for high risk individuals in both active intervention groups. MEASURES. Health risk status, general health status, consumer activation, productivity, and the ability to evaluate health information. ANALYSIS. Multivariate analyses controlled for baseline differences among the study groups. RESULTS. At the population level, compared with baseline performance, the traditional health promotion intervention improved health risk status, consumer activation, and the ability to recognize reliable health websites. Compared with baseline performance, the activated consumer intervention improved consumer activation, productivity, and the ability to recognize reliable health websites. At the population level, however, only the activated consumer intervention improved any outcome more than the control group did; that outcome was consumer activation. At the individual level for high risk individuals, both traditional health coaching and activated consumer coaching positively affected health risk status and consumer activation. In addition, both coaching interventions improved participant ability to recognize a reliable health website. Consumer activation coaching also

  9. EVALUATION OF WORK PLACE GROUP AND INTERNET BASED PHYSICAL ACTIVITY INTERVENTIONS ON PSYCHOLOGICAL VARIABLES ASSOCIATED WITH EXERCISE BEHAVIOR CHANGE

    Directory of Open Access Journals (Sweden)

    Kimberley A. Dawson

    2008-12-01

    Full Text Available The purpose of this research was to compare group-based and internet-based physical activity interventions in terms of desirability, participant characteristics, exercise self-efficacy, and barrier self-efficacy. Pretest questionnaires were completed prior to voluntary enrollment into either of the ten-week physical activity interventions. Both interventions were based on Social Cognitive Theory and the Transtheoretical Model. Interventions were followed with posttest questionnaires. Results demonstrated that the internet intervention attracted more participants, but only the group-based participants showed significant increases in exercise and barrier self-efficacy. At pretest, participants who selected the internet intervention were significantly lower in life and job satisfaction than those who selected the group intervention. Results suggest that traditional group-based exercise interventions are helpful for improving cognitions associated with exercise behavior change (e.g., exercise self-efficacy and that the internet intervention may help employees who fall into an "unhappy employee" typology

  10. Analysis and Evaluation of Social Contagion of Physical Activity in a Group of Young Adults

    NARCIS (Netherlands)

    Fernandes de Mello Araujo, E.; Tran, A.V.T.T.; Mollee, J.S.; Klein, M.C.A.

    2015-01-01

    It is known that opinions, attitudes and emotions spread through social networks. Several of these cognitions influence behavioral choices. Therefore, it is assumed that the level of physical activity of a person is influenced by the activity levels of the people in its social network. We have

  11. Group Member or Outsider: Perceptions of Undergraduates with Disabilities on Leisure Time Physical Activity

    Science.gov (United States)

    Devine, Mary Ann

    2013-01-01

    College provides students with many opportunities to achieve academic success and enrich other aspects of their lives. Participating in campus activities can reduce stress, create social connections, promote healthy active living, and broaden civic engagement (Lindsey & Sessoms, 2006; Watson, Ayers, Zizzi, & Naoi, 2006). Studies noting…

  12. Focus group interviews reveal reasons for differences in the perception of disease activity in rheumatoid arthritis

    NARCIS (Netherlands)

    M.J. Walter (Margot); van’t Spijker, A. (Adriaan); A. Pasma (Annelieke); J.M.W. Hazes (Mieke); J.J. Luime (Jolanda)

    2017-01-01

    textabstractObjective: Doctors frequently see patients who have difficulties coping with their disease and rate their disease activity high, despite the fact that according to the doctors, the disease activity is low. This study explored the patients’ perspectives on this discordance that may help

  13. Exploring Preferences of Mentoring Activities among Generational Groups of Registered Nurses in Florida

    Science.gov (United States)

    Posey-Goodwin, Patricia Ann

    2013-01-01

    The purpose of this study was to explore differences in perceptions of mentoring activities from four generations of registered nurses in Florida, using the Alleman Mentoring Activities Questionnaire ® (AMAQ ®). Statistical procedures of analysis of variance (ANOVA) were employed to explore differences among 65 registered nurses in Florida from…

  14. Physical activity locations in Georgia: frequency of use by socio-demographic group

    Science.gov (United States)

    Lincoln R. Larson; Jason W. Whiting; Gary T. Green; J. M. Bowker

    2014-01-01

    Active outdoor recreation helps to mitigate health consequences associated with sedentary behavior. Enhanced understanding of socio-demographic differences in physical activity (PA) location preferences could therefore contribute to health promotion.This study examined frequency o fuse fo rvarious PA locations in Georgia,a state with historically high levels of...

  15. Active placebo control groups of pharmacological interventions were rarely used but merited serious consideration: a methodological overview.

    Science.gov (United States)

    Jensen, Jakob Solgaard; Bielefeldt, Andreas Ørsted; Hróbjartsson, Asbjørn

    2017-07-01

    Active placebos are control interventions that mimic the side effects of the experimental interventions in randomized trials and are sometimes used to reduce the risk of unblinding. We wanted to assess how often randomized clinical drug trials use active placebo control groups; to provide a catalog, and a characterization, of such trials; and to analyze methodological arguments for and against the use of active placebo. An overview consisting of three thematically linked substudies. In an observational substudy, we assessed the prevalence of active placebo groups based on a random sample of 200 PubMed indexed placebo-controlled randomized drug trials published in October 2013. In a systematic review, we identified and characterized trials with active placebo control groups irrespective of publication time. In a third substudy, we reviewed publications with substantial methodological comments on active placebo groups (searches in PubMed, The Cochrane Library, Google Scholar, and HighWirePress). The prevalence of trials with active placebo groups published in 2013 was 1 out of 200 (95% confidence interval: 0-2), 0.5% (0-1%). We identified and characterized 89 randomized trials (published 1961-2014) using active placebos, for example, antihistamines, anticholinergic drugs, and sedatives. Such trials typically involved a crossover design, the experimental intervention had noticeable side effects, and the outcomes were patient-reported. The use of active placebos was clustered in specific research settings and did not appear to reflect consistently the side effect profile of the experimental intervention, for example, selective serotonin reuptake inhibitors were compared with active placebos in pain trials but not in depression trials. We identified and analyzed 25 methods publications with substantial comments. The main argument for active placebo was to reduce risk of unblinding; the main argument against was the risk of unintended therapeutic effect. Pharmacological

  16. 'Physical activity at home (PAAH)', evaluation of a group versus home based physical activity program in community dwelling middle aged adults: rationale and study design.

    Science.gov (United States)

    Freene, Nicole; Waddington, Gordon; Chesworth, Wendy; Davey, Rachel; Goss, John

    2011-11-24

    It is well recognised that the adoption and longer term adherence to physical activity by adults to reduce the risk of chronic disease is a challenge. Interventions, such as group and home based physical activity programs, have been widely reported upon. However few studies have directly compared these interventions over the longer term to determine their adherence and effectiveness. Participant preference for home based or group interventions is important. Some evidence suggests that home based physical activity programs are preferred by middle aged adults and provide better long term physical activity adherence. Physiotherapists may also be useful in increasing physical activity adherence, with limited research on their impact. 'Physical Activity at Home' is a 2 year pragmatic randomised control trial, with a non-randomised comparison to group exercise. Middle-aged adults not interested in, or unable to attend, a group exercise program will be targeted. Sedentary community dwelling 50-65 year olds with no serious medical conditions or functional impairments will be recruited via two mail outs using the Australian federal electoral roll. The first mail out will invite participants to a 6 month community group exercise program. The second mail out will be sent to those not interested in the group exercise program inviting them to take part in a home based intervention. Eligible home based participants will be randomised into a 6 month physiotherapy-led home based physical activity program or usual care. Outcome measures will be taken at baseline, 6, 12, 18 and 24 months. The primary outcome is physical activity adherence via exercise diaries. Secondary outcomes include the Active Australia Survey, accelerometry, aerobic capacity (step test), quality of life (SF-12v2), blood pressure, waist circumference, waist-to-hip ratio and body mass index. Costs will be recorded prospectively and qualitative data will be collected. The planned 18 month follow-up post

  17. A Relationship Between the Solar Rotation and Activity Analysed by Tracing Sunspot Groups

    Science.gov (United States)

    Ruždjak, Domagoj; Brajša, Roman; Sudar, Davor; Skokić, Ivica; Poljančić Beljan, Ivana

    2017-12-01

    The sunspot position published in the data bases of the Greenwich Photoheliographic Results (GPR), the US Air Force Solar Optical Observing Network and National Oceanic and Atmospheric Administration (USAF/NOAA), and of the Debrecen Photoheliographic Data (DPD) in the period 1874 to 2016 were used to calculate yearly values of the solar differential-rotation parameters A and B. These differential-rotation parameters were compared with the solar-activity level. We found that the Sun rotates more differentially at the minimum than at the maximum of activity during the epoch 1977 - 2016. An inverse correlation between equatorial rotation and solar activity was found using the recently revised sunspot number. The secular decrease of the equatorial rotation rate that accompanies the increase in activity stopped in the last part of the twentieth century. It was noted that when a significant peak in equatorial rotation velocity is observed during activity minimum, the next maximum is weaker than the previous one.

  18. Una metodología muestral sugerida para la estimación de la población de la chinche de los pastos en la sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Galindo Julio Ricardo

    2001-12-01

    Full Text Available La chinche de los pastos (Collaria scenica Stal es una plaga
    del pasto kikuyo (Pennisetum clandestinum que causa alrededor de un 25% de pérdidas en el ingreso de los ganaderos en la Sabana de Bogotá. La evaluación de las poblaciones del insecto y su dinámica es esencial para el desarrollo de investigación en métodos de manejo del problema. En este trabajo se seleccionaron dos lotes de kikuyo de aproximadamente 1 ha, para determinar
    una metodología eficiente, económica y precisa de estimación
    de la población de estados inmaduros y adultos del insecto,
    utilizando la técnica deljameo. Se tomaron 39 muestras aproximadamente por lote y se hicieron visitas cada dos semanas, para un total de cinco. Con esta información se determinó el patrón de disposición espacial de la plaga y se definieron tamaños de muestra para niveles de precisión determinados. Además se propuso un tamaño del lote con fines de realización de pruebas experimentales, de 1/3 de ha. Finalmente se determinó la conveniencia de hacer paso y repaso sobre el recorrido de la unidad de muestreo, con el fin de lograr una mejor aproximación a la población total del insecto en el lote.

  19. Efecto de Bombus atratus (Hymenoptera: Apidae sobre la productividad de tomate (Lycopersicon esculentum Mill. bajo invernadero en la Sabana de Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Cure José Ricardo

    2007-06-01

    Full Text Available

    En varios países se utilizan con éxito especies de abejorros del género Bombus para la polinización de tomate, reportándose incrementos de productividad hasta del 40%. En la Sabana de Bogotá existen varias especies nativas del género, por lo que se planteó examinar su potencial, desde el punto de vista de su cría en cautiverio y de su utilización como polinizadores de tomate y otras solanáceas. En este trabajo se evaluó el potencial de la especie nativa Bombus atratus como polinizador de tomate, mediante la introducción al cultivo de colonias criadas en cautiverio. Se comparó la autopolinización espontánea de la planta, frente a la obtenida con ayuda de las obreras de B. atratus. Los frutos visitados por ellas presentaron incrementos significativos para las variables ‘peso fresco del fruto’ (40,9%, ‘número de semillas’ (103,3%, ‘diámetro ecuatorial’ (14,3% y ‘proporción de lóculos bien desarrollados’ (42,2%. La relativa facilidad para la cría de esta especie en cautiverio, y el potencial demostrado en el aumento de productividad del tomate bajo invernadero, muestran la necesidad de profundizar en estos estudios en Colombia.

  20. The brown algae Pl.LSU/2 group II intron-encoded protein has functional reverse transcriptase and maturase activities.

    Directory of Open Access Journals (Sweden)

    Madeleine Zerbato

    Full Text Available Group II introns are self-splicing mobile elements found in prokaryotes and eukaryotic organelles. These introns propagate by homing into precise genomic locations, following assembly of a ribonucleoprotein complex containing the intron-encoded protein (IEP and the spliced intron RNA. Engineered group II introns are now commonly used tools for targeted genomic modifications in prokaryotes but not in eukaryotes. We speculate that the catalytic activation of currently known group II introns is limited in eukaryotic cells. The brown algae Pylaiella littoralis Pl.LSU/2 group II intron is uniquely capable of in vitro ribozyme activity at physiological level of magnesium but this intron remains poorly characterized. We purified and characterized recombinant Pl.LSU/2 IEP. Unlike most IEPs, Pl.LSU/2 IEP displayed a reverse transcriptase activity without intronic RNA. The Pl.LSU/2 intron could be engineered to splice accurately in Saccharomyces cerevisiae and splicing efficiency was increased by the maturase activity of the IEP. However, spliced transcripts were not expressed. Furthermore, intron splicing was not detected in human cells. While further tool development is needed, these data provide the first functional characterization of the PI.LSU/2 IEP and the first evidence that the Pl.LSU/2 group II intron splicing occurs in vivo in eukaryotes in an IEP-dependent manner.

  1. Multidrug reverting activity toward leukemia cells in a group of new verapamil analogues with low cardiovascular activity

    DEFF Research Database (Denmark)

    Biscardi, Monica; Teodori, Elisabetta; Caporale, Roberto

    2005-01-01

    36, CTS 27 and CTS 41, that are the most interesting compounds as MDR inhibitors, followed this course: MM 36>CTS 27>CTS 41, the last one presenting no cardiovascular activity. Chemosensivity to IDA in K-562/doxR cells and AML blasts could be enhanced in vitro by the adjuvant use of the six new VRP...... of these proteins, several attempts have been made to modulate their expression and activity (protein kinase C inhibitors, anti-MDR-1 oligonucleotides, pharmacological competitors and transcriptional inhibitors). Six new compounds (MM 36, CTS 4, CTS 9, CTS 12, CTS 27 and CTS 41), derived from verapamil (VRP), were......), in the presence or absence of inhibitors, showed that these compounds function well. All the resistance modifying agents potentiated IDA activity inducing a significant reduction (P

  2. Ferredoxin-thioredoxin reductase: a catalytically active dithiol group links photoreduced ferredoxin to thioredoxin functional in photosynthetic enzyme regulation

    International Nuclear Information System (INIS)

    Droux, M.; Miginiac-Maslow, M.; Jacquot, J.P.; Gadal, P.; Crawford, N.A.; Kosower, N.S.; Buchanan, B.B.

    1987-01-01

    The mechanism by which the ferredoxin-thioredoxin system activates the target enzyme, NADP-malate dehydrogenase, was investigated by analyzing the sulfhydryl status of individual protein components with [ 14 C]iodoacetate and monobromobimane. The data indicate that ferredoxin-thioredoxin reductase (FTR)--an iron-sulfur enzyme present in oxygenic photosynthetic organisms--is the first member of a thiol chain that links light to enzyme regulation. FTR possesses a catalytically active dithiol group localized on the 13 kDa (similar) subunit, that occurs in all species investigated and accepts reducing equivalents from photoreduced ferredoxin and transfers them stoichiometrically to the disulfide form of thioredoxin m. The reduced thioredoxin m, in turn, reduces NADP-malate dehydrogenase, thereby converting it from an inactive (S-S) to an active (SH) form. The means by which FTR is able to combine electrons (from photoreduced ferredoxin) with protons (from the medium) to reduce its active disulfide group remains to be determined

  3. OPTICAL STUDIES OF PENICILLIN GROUP IN RELATION TO THEIR MEDICAL ACTIVITY

    Directory of Open Access Journals (Sweden)

    R. Jeevan Kumar

    2017-11-01

    Full Text Available The study of Medical activity of antibiotics is gaining momentum now a days owing to the importance of their curative values.  The Medical Activity correlated to molecular interactions,can be studied by various physical techniques, at present optical methods like Refractometry and Polarization are used to study the activity of a few antibiotics like Penicillin.  The Refractive Indices Mean Molecular Polarizability Diamagnetic Susceptibilities and Electron Ionisation Cross Section are interpreted in terms of dosages and the toxic effects if any due to over dosages are discussed critically.

  4. Analysis of activity in swine producers group based on agricultural producers association in Biała district

    Directory of Open Access Journals (Sweden)

    Damian Knecht

    2013-03-01

    Full Text Available The process of pigs producer groups formation in Poland is quite dynamic. Currently on the pork market 181 groups operate, which includes about 4000 swine producers. The aim of this study was to characterize the activities of the Agricultural Producers Association in Biała District. The research tool was a personal questionnaire and the research sample consisted of 30 farmers. It has been shown that after joining the producers group, the investigated households reported an increase in sales volume and improved the flock production parameters. Majority of the respondents were not satisfied with the cooperation with meat processing companies.

  5. Research activities of the nuclear graphite research group at the University of Manchester, UK

    International Nuclear Information System (INIS)

    Marsden, B.J.; Fok, A.S.L.; Marrow, J.; Mummery, P.

    2004-01-01

    In 2001 the Nuclear Safety Division (NSD) of the UK Health and Safety Executive (HSE) decided to underwrite the Nuclear Graphite Research Group (NGRG) at the University of Manchester, UK with the aim of providing a source of independent research and advice to the HSE (NSD). Since then the group has rapidly expanded to 16 members and attracted considerable funding from the nuclear power industry and the regulator for a wide range of research and consultancy work. It is now also part of the Material Performance Centre within the BNFL Universities Research Alliance. Extensive collaboration exists between the group and other nuclear research institutes, both in the UK and overseas. This paper briefly describes some of the research programmes being carried out by the NGRG at Manchester. (author)

  6. Activation of groups of excitatory neurons in the mammalian spinal cord or hindbrain evokes locomotion

    DEFF Research Database (Denmark)

    Hägglund, Martin; Borgius, Lotta; Dougherty, Kimberly J.

    2010-01-01

    Central pattern generators (CPGs) are spinal neuronal networks required for locomotion. Glutamatergic neurons have been implicated as being important for intrinsic rhythm generation in the CPG and for the command signal for initiating locomotion, although this has not been demonstrated directly. We...... neurons in the spinal cord are critical for initiating or maintaining the rhythm and that activation of hindbrain areas containing the locomotor command regions is sufficient to directly activate the spinal locomotor network....

  7. Active lifestyle all your life : a multifactorial group-based falls-prevention programme

    OpenAIRE

    Johansson, Erika

    2015-01-01

    Internationally, gerontology focuses on an emerging paradigm of healthy ageing where the goal is to extend the senior years in absence of morbidity by improving human health. A major threat to healthy ageing is accidental falls, as falls are the second-leading cause of unintentional injury or deaths worldwide. For the individual who falls, it is crucial to be able to continue living an active, independent life in one’s senior years. Additionally social engagement, valued activities, as well a...

  8. Serum γ-Glutamyltransferase, Alanine Aminotransferase and Aspartate Aminotransferase Activity in Healthy Blood Donor of Different Ethnic Groups in Gorgan.

    Science.gov (United States)

    Marjani, Abdoljalal; Mehrpouya, Masoumeh; Pourhashem, Zeinab

    2016-07-01

    Measure of liver enzymes may help to increase safety of blood donation for both blood donor and recipient. Determination of liver enzymes may prepare valuable clinical information. To assess serum γ-Glutamyltransferase (GGT), Alanine Aminotransferase (ALT), and Aspartate Aminotransferase (AST) activities in healthy blood donors in different ethnic groups in Gorgan. This study was performed in 450 healthy male blood donors, in three ethnic groups (Fars, Sistanee and Turkman) who attended Gorgan blood transfusion center. Liver enzymes (GGT, ALT and AST) were determined. Serum AST and ALT in three ethnic groups were significant except for serum GGT levels. There was significant correlation between family histories of liver disease and systolic blood pressure and AST in Fars, and GGT in Sistanee ethnic groups. Several factors, such as age, family history of diabetes mellitus, family history of liver disease and smoking habit had no effect on some liver enzymes in different ethnic groups in this area. Variation of AST, ALT, and GGT enzyme activities in healthy subjects was associated with some subjects in our study groups. According to our study, it suggests that screening of AST and GGT enzymes in subjects with family history of liver disease is necessary in different ethnic groups.

  9. Structure-transfection activity relationships in a series of novel cationic lipids with heterocyclic head-groups.

    Science.gov (United States)

    Ivanova, Ekaterina A; Maslov, Mikhail A; Kabilova, Tatyana O; Puchkov, Pavel A; Alekseeva, Anna S; Boldyrev, Ivan A; Vlassov, Valentin V; Serebrennikova, Galina A; Morozova, Nina G; Zenkova, Marina A

    2013-11-07

    Cationic liposomes are promising candidates for the delivery of various therapeutic nucleic acids. Here, we report a convenient synthesis of carbamate-type cationic lipids with various hydrophobic domains (tetradecanol, dialkylglycerol, cholesterol) and positively charged head-groups (pyridinium, N-methylimidazolium, N-methylmorpholinium) and data on the structure-transfection activity relationships. It was found that single-chain lipids possess high surface activity, which correlates with high cytotoxicity due to their ability to disrupt the cellular membrane by combined hydrophobic and electrostatic interactions. Liposomes containing these lipids also display high cytotoxicity with respect to all cell lines. Irrespective of chemical structures, all cationic lipids form liposomes with similar sizes and surface potentials. The characteristics of complexes composed of cationic liposomes and nucleic acids depend mostly on the type of nucleic acid and P/N ratios. In the case of oligodeoxyribonucleotide delivery, the transfection activity depends on the type of cationic head-group regardless of the type of hydrophobic domain: all types of cationic liposomes mediate efficient oligonucleotide transfer into 80-90% of the eukaryotic cells, and liposomes based on lipids with N-methylmorpholinium cationic head-group display the highest transfection activity. In the case of plasmid DNA and siRNA, the type of hydrophobic domain determines the transfection activity: liposomes composed of cholesterol-based lipids were the most efficient in DNA transfer, while liposomes containing glycerol-based lipids exhibited reasonable activity in siRNA delivery under serum-free conditions.

  10. DEVELOPMENT AND INVESTIGATION OF LAYOUT OF ACTIVE SCREENING SYSTEM OF THE MAGNETIC FIELD GENERATED BY GROUP OF OVERHEAD TRANSMISSION LINES

    Directory of Open Access Journals (Sweden)

    B. I. Kuznetsov

    2018-04-01

    Full Text Available Purpose. Development and field experimental research of layout of the single-circuit active screening system of the magnetic field generated by group of high voltage transmission lines in residential area is given. Methodology. Mathematical model of magnetic field, generated by group of high voltage transmission lines in residential area, based of the experimental values of magnetic field flux density in given points on the basis of optimization problem solving is improved. The objective of the synthesis of the single circuit active screening system is to determine their number, configuration, spatial arrangement, wiring diagrams and compensation cables currents, setting algorithm of the control systems as well as the resulting value of the magnetic flux density at the points of the protected space. Synthesis of the full-scale model of active screening system is reduced to the problem of multiobjective nonlinear programming with constraints in which calculation of the objective functions and constraints are carried out on the basis of the Maxwell equations solutions in the quasi-stationary approximation. The problem is solved by a stochastic multiswarm multi-agent particles optimization. Results. The single-circuit active screening system synthesis results for reduction of a magnetic field generated by group of high voltage transmission lines in residential area is given. Field experimental researches of the single-circuit active screening system of the magnetic field generated by group of high voltage transmission lines in residential area with various control algorithms is given. Originality. For the first time out the development and field experimental studies of the single-circuit active screening system of the magnetic field generated by group of high voltage transmission lines in residential area are carried out. Practical value. Practical recommendations on reasonable choice of the spatial arrangement of compensating cables of single

  11. Increased cytotoxicity and streptolysin O activity in group G streptococcal strains causing invasive tissue infections

    DEFF Research Database (Denmark)

    Siemens, Nikolai; Kittang, Bård R; Chakrakodi, Bhavya

    2015-01-01

    Streptococcus dysgalactiae subsp. equisimilis (SDSE) has emerged as an important cause of severe skin and soft tissue infections, but little is known of the pathogenic mechanisms underlying tissue pathology. Patient samples and a collection of invasive and non-invasive group G SDSE strains (n = 6...

  12. Exploring students' learning effectiveness and attitude in Group Scribbles-supported collaborative reading activities

    DEFF Research Database (Denmark)

    Lin, C. P.; Lin, Chih-Cheng; Chen, W.

    2014-01-01

    Improving students' reading comprehension is of significance. In this study, collaborative learning supported by Group Scribbles (GS), a networked technology, was integrated into a primary reading class. Forty-seven 10-year-old students from two 4th grade classes participated in the study...

  13. Web Support for Activating Use of Theory in Group based Learning

    NARCIS (Netherlands)

    van der Veen, Johan (CTIT); van Riemsdijk, Maarten; Laagland, Eelko; Gommer, E.M.; Jones, Valerie M.; Davies, Gordon; Owen, Charles B.

    2000-01-01

    This paper describes a series of experiments conducted within the context of a course on organisational theory which is taught at the Department of Management Sciences at the University of Twente. In 1997 a group-based learning approach was adopted but after the first year it was apparent that

  14. U.S.-GERMAN BILATERAL WORKING GROUP PHASE 3 ACTIVITIES-AN OVERVIEW

    Science.gov (United States)

    The U.S.-German Bilateral Working Group originated in 1990 in order to share and transfer information, ideas, tools and techniques regarding environmental research. The U.S. Environmental Protection Agency (EPA) and the German Federal Ministry for Education and Research (BMBF) de...

  15. 75 FR 74061 - Agency Information Collection Activities; Proposed Collection; Comment Request; Focus Groups as...

    Science.gov (United States)

    2010-11-30

    ..., motivations, and feelings than do quantitative studies. Focus groups serve the narrowly defined need for... to test and refine their ideas but will generally conduct further research before making important decisions, such as adopting new policies and allocating or redirecting significant resources to support...

  16. Group Tasks, Activities, Dynamics, and Interactions in Collaborative Robotics Projects with Elementary and Middle School Children

    Science.gov (United States)

    Yuen, Timothy T.; Boecking, Melanie; Stone, Jennifer; Tiger, Erin Price; Gomez, Alvaro; Guillen, Adrienne; Arreguin, Analisa

    2014-01-01

    Robotics provide the opportunity for students to bring their individual interests, perspectives and areas of expertise together in order to work collaboratively on real-world science, technology, engineering and mathematics (STEM) problems. This paper examines the nature of collaboration that manifests in groups of elementary and middle school…

  17. Soft Skills : An Important Asset Acquired from Organizing Regional Student Group Activities

    NARCIS (Netherlands)

    De Ridder, J.; Meysman, P.; Oluwagbemi, O.; Abeel, T.

    2014-01-01

    Contributing to a student organization, such as the International Society for Computational Biology Student Council (ISCB-SC) and its Regional Student Group (RSG) program, takes time and energy. Both are scarce commodities, especially when you are trying to find your place in the world of

  18. Education and labor market activity of women: an age-group specific empirical analysis

    NARCIS (Netherlands)

    Münch, C.; van Wijnbergen, S.

    2009-01-01

    We analyze the determinants of female labor market participation for different age-groups in the European Union. We show that female participation is positively affected by tertiary education at any age. But upper secondary education increases participation only up to an age of 40 while after that

  19. Use of research reactors for neutron activation analysis. Report of an advisory group meeting

    International Nuclear Information System (INIS)

    2001-04-01

    Neutron activation analysis (NAA) is an analytical technique based on the measurement of characteristic radiation from radionuclides formed directly or indirectly by neutron irradiation of the material of interest. In the last three decades, neutron activation analysis has been found to be extremely useful in the determination of trace and minor elements in many disciplines. These include environmental analysis applications, nutritional and health related studies, geological as well as material sciences. The most suitable source of neutrons for NAA is a research reactor. There are several application fields in which NAA has a superior position compared to other analytical methods, and there are good prospects in developing countries for long term growth. Therefore, the IAEA is making concerted efforts to promote neutron activation analysis and at the same time to assist developing Member States in better utilization of their research reactors. The purpose of the meeting was to discuss the benefits and the role of NAA in applications and research areas that may contribute towards improving utilization of research reactors. The participants focused on five specific topics: (1) Current trends in NAA; (2) The role of NAA compared to other methods of chemical analysis; (3) How to increase the number of NAA users through interaction with industries, research institutes, universities and medical institutions; (4) How to reduce costs and to maintain quality and reliability; (5) NAA using low power research reactors. Neutron activation analysis in its various forms is still active and there are good prospects in developing countries for long-term growth. This can be achieved by a more effective use of existing irradiation and counting facilities, a better end-user focus, and perhaps marginal improvements in equipment and techniques. Therefore, it is recommended that the Member States provide financial and other assistance to enhance the effectiveness of their laboratories

  20. Students’ Evaluation of Google Hangouts Through A Cross-Cultural Group Discussion Activity

    Directory of Open Access Journals (Sweden)

    Michiko KOBAYASHI

    2015-04-01

    Full Text Available The study investigated perceived ease of use and usefulness of Google Hangouts as an instructional/learning tool. Forty-two teacher education students at U.S and Japanese universities participated in an online cross-cultural activity using Google Hangouts and discussed cultural differences between the two countries and their teaching philosophies. After the activity, students responded to a survey to evaluate the ease of use and usefulness of Google Hangouts. Qualitative data were also collected through the survey to examine their overall learning experience. The results indicated that Google Hangouts is a useful instructional tool, but not easy to use. Although technical problems occurred during the conference, the activity provided valuable experiences for both U.S. and Japanese students. The study provides suggestions for how Google Hangouts can be integrated into online classrooms based on the findings.

  1. Comparison Between Individually and Group-Based Insulin Pump Initiation by Time-Driven Activity-Based Costing.

    Science.gov (United States)

    Ridderstråle, Martin

    2017-07-01

    Depending on available resources, competencies, and pedagogic preference, initiation of insulin pump therapy can be performed on either an individual or a group basis. Here we compared the two models with respect to resources used. Time-driven activity-based costing (TDABC) was used to compare initiating insulin pump treatment in groups (GT) to individual treatment (IT). Activities and cost drivers were identified, timed, or estimated at location. Medical quality and patient satisfaction were assumed to be noninferior and were not measured. GT was about 30% less time-consuming and 17% less cost driving per patient and activity compared to IT. As a batch driver (16 patients in one group) GT produced an upward jigsaw-shaped accumulative cost curve compared to the incremental increase incurred by IT. Taking the alternate cost for those not attending into account, and realizing the cost of opportunity gained, suggested that GT was cost neutral already when 5 of 16 patients attended, and that a second group could be initiated at no additional cost as the attendance rate reached 15:1. We found TDABC to be effective in comparing treatment alternatives, improving cost control and decision making. Everything else being equal, if the setup is available, our data suggest that initiating insulin pump treatment in groups is far more cost effective than on an individual basis and that TDABC may be used to find the balance point.

  2. Cross national study of leisure-time physical activity in Dutch and English populations with ethnic group comparisons

    NARCIS (Netherlands)

    de Munter, Jeroen S. L.; Agyemang, Charles; van Valkengoed, Irene G. M.; Bhopal, Raj; Zaninotto, Paola; Nazroo, James; Kunst, Anton E.; Stronks, Karien

    2013-01-01

    Variations between countries in leisure-time physical activity (LTPA) can be used to test the convergence thesis, which expects that ethnic minority groups change towards the LTPA levels of the native population of host countries. The aim of this study was to test whether similar differences in LTPA

  3. Perspective: Crowd-based breath analysis: assessing behavior, activity, exposures, and emotional response of people in groups

    Science.gov (United States)

    A new concept for exhaled breath analysis has emerged wherein groups, or even crowds of people are simultaneously sampled in enclosed environments to detect overall trends in their activities and recent exposures. The basic idea is to correlate the temporal profile of known breat...

  4. Effectiveness of Group Activity Play Therapy on Internalizing and Externalizing Behavior Problems of Preadolescent Orphans in Uganda

    Science.gov (United States)

    Ojiambo, Deborah

    2011-01-01

    This pilot study investigated the impact of group activity play therapy (GAPT) on displaced orphans aged 10 to 12 years living in a large children's village in Uganda. Teachers and housemothers identified 60 preadolescents exhibiting clinical levels of internalizing and externalizing behavior problems. The participants' ethnicity was African and…

  5. An Activity Theory Analysis of the Relationship between Student Identity and the Assessment of Group Composing at School

    Science.gov (United States)

    Thorpe, Vicki

    2018-01-01

    The purpose of this article is to contribute to existing literature about how activity theory might be used in music education research. It draws from the author's doctoral action research into the assessment of group composing for New Zealand's secondary school qualification, the National Certificate of Educational Achievement (NCEA). It outlines…

  6. Synthesis, structural characterisation and bonding in an anionic hexavanadate bearing redox-active ferrocenyl groups at the periphery

    Czech Academy of Sciences Publication Activity Database

    Schulz, J.; Gyepes, Robert; Císařová, I.; Štěpnička, P.

    2010-01-01

    Roč. 34, č. 12 (2010), s. 2749-2756 ISSN 1144-0546 R&D Projects: GA MŠk(CZ) LC06070 Institutional research plan: CEZ:AV0Z40400503 Keywords : synthesis * redox-active ferrocenyl groups * ferrocene Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 2.631, year: 2010

  7. Utility-maximizing model of household time use for independent, shared, and allocated activities incorporating group decision mechanisms

    NARCIS (Netherlands)

    Zhang, J.; Timmermans, H.J.P.; Borgers, A.W.J.

    2002-01-01

    Existing activity-based models of transport demand typically assume an individual decision-making process. The focus on theories of individual decision making may be partially due to the lack of behaviorally oriented modeling methodologies for group decision making. Therefore, an attempt has been

  8. The comparative effectiveness of a team-based versus group-based physical activity intervention for cancer survivors.

    Science.gov (United States)

    Carter, Cindy L; Onicescu, Georgiana; Cartmell, Kathleen B; Sterba, Katherine R; Tomsic, James; Alberg, Anthony J

    2012-08-01

    Physical activity benefits cancer survivors, but the comparative effectiveness of a team-based delivery approach remains unexplored. The hypothesis tested was that a team-based physical activity intervention delivery approach has added physical and psychological benefits compared to a group-based approach. A team-based sport accessible to survivors is dragon boating, which requires no previous experience and allows for diverse skill levels. In a non-randomized trial, cancer survivors chose between two similarly structured 8-week programs, a dragon boat paddling team (n = 68) or group-based walking program (n = 52). Three separate intervention rounds were carried out in 2007-2008. Pre-post testing measured physical and psychosocial outcomes. Compared to walkers, paddlers had significantly greater (all p team cohesion, program adherence/attendance, and increased upper-body strength. For quality-of-life outcomes, both interventions were associated with pre-post improvements, but with no clear-cut pattern of between-intervention differences. These hypothesis-generating findings suggest that a short-term, team-based physical activity program (dragon boat paddling) was associated with increased cohesion and adherence/attendance. Improvements in physical fitness and psychosocial benefits were comparable to a traditional, group-based walking program. Compared to a group-based intervention delivery format, the team-based intervention delivery format holds promise for promoting physical activity program adherence/attendance in cancer survivors.

  9. A Group Contingency plus Self-Management Intervention Targeting At-Risk Secondary Students' Class-Work and Active Engagement

    Science.gov (United States)

    Trevino-Maack, Sylvia I.; Kamps, Debra; Wills, Howard

    2015-01-01

    The purpose of the present study is to show that an independent group contingency (GC) combined with self-management strategies and randomized-reinforcer components can increase the amount of written work and active classroom responding in high school students. Three remedial reading classes and a total of 15 students participated in this study.…

  10. Cockayne Syndrome group B protein stimulates NEIL2 DNA glycosylase activity

    DEFF Research Database (Denmark)

    Aamann, Maria Diget; Hvitby, Christina Poulsen; Popuri, Venkateswarlu

    2014-01-01

    Cockayne Syndrome is a segmental premature aging syndrome, which can be caused by loss of function of the CSB protein. CSB is essential for genome maintenance and has numerous interaction partners with established roles in different DNA repair pathways including transcription coupled nucleotide...... activity on a 5-hydroxyl uracil lesion in a DNA bubble structure substrate in vitro. A novel 4,6-diamino-5-formamidopyrimidine (FapyA) specific incision activity of NEIL2 was also stimulated by CSB. To further elucidate the biological role of the interaction, immunofluorescence studies were performed...

  11. Determinants of Practising Selected Forms of Physical Activity in a Group of Administrative and Office Workers

    Directory of Open Access Journals (Sweden)

    Kowalczyk Anna

    2016-03-01

    Full Text Available Introduction. In recent years, a decline in the level of physical activity has been observed all over the world. The number of professions where work is performed in a sitting position has increased. This has had many consequences for our health, the society, and the economy. The aim of this work was to determine which forms of physical activity are the most popular in administrative and office workers, depending on the motives which encourage them to be active. Material and methods. In 2014, a diagnostic survey was carried out among 937 persons in administrative and office positions using a questionnaire form designed by the authors. The study involved persons aged 18 to 65 years, and most of the respondents were female (n = 669. A qualitative analysis of the data was carried out using logistic regression, and the findings were considered statistically significant at p < 0.05. Results. Changing the shape of one’s body was found to be the main determinant of using the gym among the respondents. Persons who jogged regularly, on the other hand, did so in order to increase physical fitness, and those who practised Nordic walking were motivated by the need to care for their health. As far as swimming is concerned, persons who had friends that engaged in this form of activity undertook it almost ten times more often than those who did not have such support from their family and friends (OR = 9.58. Respondents who desired to meet new people were over five times more likely to choose team games as an active form of spending their leisure time (OR = 5.21 than other respondents. Finally, those who engaged in physical activity in order to strengthen family bonds preferred playing and playing games with children in the open air. Conclusions. The predominant forms of physical activity which were regularly performed by the respondents were walking, cycling, and doing gymnastic exercise at home. The respondents were mainly motivated to pursue these

  12. A Comparative Study of Group Behavioral Activation and Cognitive Therapy in Reducing Subsyndromal Anxiety and Depressive Symptoms

    Directory of Open Access Journals (Sweden)

    Mehdi Soleimani

    2015-10-01

    Full Text Available Objective: This study compared the effectiveness of two group treatments, behavioral activation (BA and cognitive therapy (CT, in reducing subsyndromal anxiety and depressive symptoms in a sample of Iranian university students.Method: Twenty-seven Iranian university students who scored 18 or higher on the depression subscale and 16 or higher on the anxiety subscale of the Depression, Anxiety, and Stress Scale (DASS-42 were randomly assigned into treatment groups. One group received 8 sessions of BA (n = 14, and the other received 8 sessions of group CT (n = 13.Result: Analysis of covariance revealed that the BA group had a significantly greater reduction in depressive symptoms than the CT group. However, there were no significant differences between the two groups in the levels of anxiety, stress symptoms or functional impairment after treatment.Conclusion: This study found evidence for the effectiveness of BA in reducing anxiety, depressive and stress symptoms and functional impairment compared to CT. BA was more effective than CT in improving depressive symptoms and was as effective as CT in decreasing anxiety, stress and functional impairment. BA is also a cost-effective intervention, particularly in group formats.

  13. Promote the equality and fairness for everyone in physical education activity-the case of mixed group

    Directory of Open Access Journals (Sweden)

    SIMONA PETRACOVSCHI

    2011-04-01

    Full Text Available IntroductionSince the classes are mixed in Romania but the lessons of physical education are still practicing by usingseparated groups for male and female, especially for team sports (e.g. football, handball, etc where boys areplaying against boys and girls against girls, the purpose of this study is to identify and combat gender stereotypesby using games and plays for mixed group in physical education activity. Also, using the mix group in thephysical activity during all the school period will be a main method of learning civic rules, the respect ofdifference and will encourage the process of socialization between boys and girls.MethodsThe experiment was conducted between 15October 2009 to 15 May 2010 by a group of 20 students (13 girls and7 boys at the age of 13 (VII grade in Romanian system using the sociometrical method.Results and discussionIf the initial testing shows that the choice of partner is primarily based on gender, the results made after finaltesting (after 7 months of work carried out by groups combined reveals that the partner’s choice is madeaccording to sporting skills and physical development.ConclusionsThe conclusions highlight the importance of early work on mixed groups from the age of 9. The idea is tocombat the stereotypes in so called "masculine" or "feminine" sports and to emphasize the respect for equalityand fairness between students according to individual possibilities

  14. Structure-Activity Relationship of Curcumin: Role of the Methoxy Group in Anti-inflammatory and Anticolitis Effects of Curcumin.

    Science.gov (United States)

    Yang, Haixia; Du, Zheyuan; Wang, Weicang; Song, Mingyue; Sanidad, Katherine; Sukamtoh, Elvira; Zheng, Jennifer; Tian, Li; Xiao, Hang; Liu, Zhenhua; Zhang, Guodong

    2017-06-07

    Curcumin, a dietary compound from turmeric, has beneficial effects on inflammatory diseases such as inflammatory bowel disease. Most previous studies have focused on the structure-activity relationship of the thiol-reactive α,β-unsaturated carbonyl groups of curcumin, so little is known about the roles of methoxy groups in biological activities of curcumin. Here we synthesized a series of curcumin analogues with different substitution groups (R = H-, Br-, Cl-, F-, NO 2 -, CH 3 -, and OH-) to replace the methoxy group and evaluated their biological effects in vitro and in vivo. Curcumin, Cur-OH, and Cur-Br (25 μM) suppressed 74.91 ± 0.88, 77.75 ± 0.89, and 71.75 ± 0.90% of LPS-induced NO production, respectively (P 0.05). In the dextran sulfate sodium (DSS)-induced colitis mouse model, the Cur-Br analogue also showed a beneficial effect the same as curcumin (P 0.05). Together, the analogues have dramatically different effects on inflammation, supporting that the substitution group on the methoxy position plays an important role in the anti-inflammatory effects of curcumin. The methoxy group is a potential structural candidate for modification to design curcumin-based drugs for inflammatory diseases.

  15. 77 FR 28894 - Agency Information Collection Activities: Collection of Qualitative Feedback Through Focus Groups

    Science.gov (United States)

    2012-05-16

    ... Policy and Strategy, 20 Massachusetts Avenue, Washington, DC 20529-2020. Comments may also be submitted...: Individuals or households; Business or other for-profit. The information collection activity will garner... directly to the improvement of program management. Feedback collected under this generic clearance will...

  16. Nonplanar Tertiary Amides in Rigid Chiral Tricyclic Dilactams. Peptide Group Distortions and Vibrational Optical Activity

    Czech Academy of Sciences Publication Activity Database

    Pazderková, Markéta; Profant, V.; Hodačová, J.; Šebestík, Jaroslav; Pazderka, T.; Novotná, P.; Urbanová, M.; Šafařík, Martin; Buděšínský, Miloš; Tichý, Miloš; Bednárová, Lucie; Baumruk, V.; Maloň, Petr

    2013-01-01

    Roč. 117, č. 33 (2013), s. 9626-9642 ISSN 1520-6106 R&D Projects: GA ČR GAP205/10/1276 Institutional support: RVO:61388963 Keywords : spirodilactams * amide bond * vibrational circular dichroism * non-planarity * Raman optical activity Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 3.377, year: 2013

  17. Students' Evaluation of Google Hangouts through a Cross-Cultural Group Discussion Activity

    Science.gov (United States)

    Kobayashi, Michiko

    2015-01-01

    The study investigated perceived ease of use and usefulness of Google Hangouts as an instructional/learning tool. Forty-two teacher education students at U.S and Japanese universities participated in an online cross-cultural activity using Google Hangouts and discussed cultural differences between the two countries and their teaching philosophies.…

  18. The Math Explorer: Games and Activities for Middle School Youth Groups.

    Science.gov (United States)

    Murphy, Pat; Lambertson, Lori; Tesler, Pearl

    This book offers games and mathematics activities using a hands-on approach for middle school students and features games, puzzles, experiments, and projects. Contents include: (1) "Boxed In!"; (2) "Oddball"; (3) "Pig"; (4) "Madagascar Solitaire"; (5) "Fantastic Four"; (6) "Eratosthenes' Sieve"; (7) "Hopping Hundred"; (8) "Tic-Tac-Toe Times"; (9)…

  19. Changes in energy metabolism in relation to physical activity due to fermentable carbohydrates in group-housed growing pigs.

    Science.gov (United States)

    Schrama, J W; Bakker, G C

    1999-12-01

    Fermentable nonstarch polysaccharides (dietary fiber) affect energy retention in group-housed growing pigs by reducing physical activity. This study assessed the effects of fermentation and bulkiness of dietary carbohydrates on physical activity in relation to energy metabolism. Eight clusters of 14 pigs were fed one of four diets in a 2x2 factorial arrangement. Factors included 1) gastrointestinal fermentation and 2) dietary bulkiness. Contrasts in fermentation were created by exchanging gelatinized maize starch with raw potato starch on a volume basis. Bulkiness was altered by adding 15% milled wheat straw to the diets. Apart from these differences, amounts of other dietary ingredients fed to the pigs were similar. Pigs were housed in groups. Nitrogen and energy balances were measured per cluster during a 14-d period. Dietary bulkiness did not affect ME intake, heat production, or energy retention. Metabolizability decreased when maize starch was replaced with raw potato starch (P< .01), resulting in a lower energy retention on the potato starch diets (P<.01). However, the lower ME intake on the potato diets was partially compensated by a reduced energy expenditure on physical activity (P< .01), which was 17.6% lower than that of pigs fed the maize starch diets. Dietary bulkiness did not affect physical activity. The effect of fiber-rich diets (nonstarch polysaccharides) on activity in growing group-housed pigs seems to be related to fermentation in the gastrointestinal tract, and not to bulkiness (volume).

  20. Fatigue-induced changes in group IV muscle afferent activity: differences between high- and low-frequency electrically induced fatigues.

    Science.gov (United States)

    Darques, J L; Jammes, Y

    1997-03-07

    Recordings of group IV afferent activity of tibialis anterior muscle were performed in paralysed rabbits during runs of electrically induced fatigue produced by direct muscle stimulation at a high (100 Hz, high-frequency fatigue HFF) or a low rate (10 Hz, low-frequency fatigue LFF). In addition to analysis of afferent nerve action potentials, muscle force and compound muscle action potentials (M waves) elicited by direct muscle stimulation with single shocks were recorded. Changes in M wave configuration were used as an index of the altered propagation of membrane potentials and the associated efflux of potassium from muscle fibers. The data show that increased group IV afferent activity occurred during LFF as well as HFF trials and developed parallel with force failure. Enhanced afferent activity was significantly higher during LFF (maximal delta f(impulses) = 249 +/- 35%) than HFF (147 +/- 45%). No correlation was obtained between the responses of group IV afferents to LFF or to pressure exerted on tibialis anterior muscle. On the other hand, decreased M wave amplitude was minimal with LFF while it was pronounced with HFF. Close correlations were found between fatigue-induced activation of group IV afferents and decreases in force or M wave amplitude, but their strength was significantly higher with LFF compared to HFF. Thus, electrically induced fatigue activates group IV muscle afferents with a prominent effect of low-frequency stimulation. The mechanism of muscle afferent stimulation does not seem to be due to the sole increase in extracellular potassium concentration, but also by the efflux of muscle metabolites, present during fatiguing contractions at low rate of stimulation.

  1. Structure–Activity Relationship of Oligomeric Flavan-3-ols: Importance of the Upper-Unit B-ring Hydroxyl Groups in the Dimeric Structure for Strong Activities

    Directory of Open Access Journals (Sweden)

    Yoshitomo Hamada

    2015-10-01

    Full Text Available Proanthocyanidins, which are composed of oligomeric flavan-3-ol units, are contained in various foodstuffs (e.g., fruits, vegetables, and drinks and are strongly biologically active compounds. We investigated which element of the proanthocyanidin structure is primarily responsible for this functionality. In this study, we elucidate the importance of the upper-unit of 4–8 condensed dimeric flavan-3-ols for antimicrobial activity against Saccharomyces cerevisiae (S. cerevisiae and cervical epithelioid carcinoma cell line HeLa S3 proliferation inhibitory activity. To clarify the important constituent unit of proanthocyanidin, we synthesized four dimeric compounds, (−-epigallocatechin-[4,8]-(+-catechin, (−-epigallocatechin-[4,8]-(−-epigallocatechin, (−-epigallocatechin-[4,8]-(−-epigallocatechin-3-O-gallate, and (+-catechin-[4,8]-(−-epigallocatechin and performed structure–activity relationship (SAR studies. In addition to antimicrobial activity against S. cerevisiae and proliferation inhibitory activity on HeLa S3 cells, the correlation of 2,2-diphenyl-l-picrylhydrazyl radical scavenging activity with the number of phenolic hydroxyl groups was low. On the basis of the results of our SAR studies, we concluded that B-ring hydroxyl groups of the upper-unit of the dimer are crucially important for strong and effective activity.

  2. Does functional capacity, fall risk awareness and physical activity level predict falls in older adults in different age groups?

    Science.gov (United States)

    Moreira, Natália Boneti; Rodacki, Andre Luiz Felix; Pereira, Gléber; Bento, Paulo Cesar Barauce

    2018-04-11

    The aims of this study were to examine whether: i) functional capacity and physical activity level differ between fallers and non-fallers older adults, by controlling for fall risk awareness; ii) functional capacity, fall risk awareness and physical activity differ between fallers and non-fallers older adults, by controlling for age; iii) variables and which may predict falls in different age groups. 1826 older adults performed a series of functional tests and reported their fall episodes, fall risk awareness and physical activity level. The overall incidence of falls was high (40.2%), and falls risk awareness scores reduced with age. The older adults with greater falls risk awareness and non-fallers presented better scores in all functional tests and physical activity level (P age groups and differed between fallers and non-fallers, irrespective of age group (P age groups (odds ranging: 1.05-1.09). Handgrip strength and balance scores predicted falls until 79 years (OR = 1.04, 95%CI = 1.01-1.06). The physical activity level predicted falls up to 70 years (OR = 1.09, 95%CI = 1.06-1.12). Functional mobility was able to predict falls up to 80 years (OR = 1.06, 95%CI = 1.01-1.08). Therefore, according to age, functional capacity, physical activity level and falls risk awareness can be a predictor of falls in older adults. Copyright © 2018 Elsevier B.V. All rights reserved.

  3. Active case finding of tuberculosis in Europe: a Tuberculosis Network European Trials Group (TBNET) survey

    DEFF Research Database (Denmark)

    Bothamley, G H; Ditiu, L; Migliori, G B

    2008-01-01

    Tuberculosis control depends on successful case finding and treatment of individuals infected with Mycobacterium tuberculosis. Passive case finding is widely practised: the present study aims to ascertain the consensus and possible improvements in active case finding across Europe. Recommendations...... from national guidelines were collected from 50 countries of the World Health Organization European region using a standard questionnaire. Contacts are universally screened for active tuberculosis and latent tuberculosis infection (LTBI). Most countries (>70%) screen those with HIV infection, prisoners...... and in-patient contacts. Screening of immigrants is related to their contribution to national rates of tuberculosis. Only 25 (50%) out of 50 advise a request for symptoms in their guidelines. A total of 36 (72%) out of 50 countries recommend sputum examination for those with a persistent cough; 13...

  4. Group Grammar

    Science.gov (United States)

    Adams, Karen

    2015-01-01

    In this article Karen Adams demonstrates how to incorporate group grammar techniques into a classroom activity. In the activity, students practice using the target grammar to do something they naturally enjoy: learning about each other.

  5. Strategic Ambidexterity Learning of Innovation Activities: A Study of Indonesian Business Group Leader

    OpenAIRE

    Retno Kusumastuti; Azhar Kasim; Sudarsono Hardjosoekarto

    2018-01-01

    Competitive advantage refers to the attributes an organization maintains to better perform in comparison to its competitors. According to the Resource Based View, human capital has become a source of competitive advantage. Literatures exploring how strategic leadership leads to ambidexterity practice is still very rare. Ambidexterity practices is about how organizations learn to conduct innovation activities in both exploitative and explorative manner. A prominent leader should have influence...

  6. Renal hemodynamic effects of activation of specific renal sympathetic nerve fiber groups.

    Science.gov (United States)

    DiBona, G F; Sawin, L L

    1999-02-01

    To examine the effect of activation of a unique population of renal sympathetic nerve fibers on renal blood flow (RBF) dynamics, anesthetized rats were instrumented with a renal sympathetic nerve activity (RSNA) recording electrode and an electromagnetic flow probe on the ipsilateral renal artery. Peripheral thermal receptor stimulation (external heat) was used to activate a unique population of renal sympathetic nerve fibers and to increase total RSNA. Total RSNA was reflexly increased to the same degree with somatic receptor stimulation (tail compression). Arterial pressure and heart rate were increased by both stimuli. Total RSNA was increased to the same degree by both stimuli but external heat produced a greater renal vasoconstrictor response than tail compression. Whereas both stimuli increased spectral density power of RSNA at both cardiac and respiratory frequencies, modulation of RBF variability by fluctuations of RSNA was small at these frequencies, with values for the normalized transfer gain being approximately 0.1 at >0.5 Hz. During tail compression coherent oscillations of RSNA and RBF were found at 0.3-0.4 Hz with normalized transfer gain of 0.33 +/- 0.02. During external heat coherent oscillations of RSNA and RBF were found at both 0.2 and 0.3-0.4 Hz with normalized transfer gains of 0. 63 +/- 0.05 at 0.2 Hz and 0.53 +/- 0.04 to 0.36 +/- 0.02 at 0.3-0.4 Hz. Renal denervation eliminated the oscillations in RBF at both 0.2 and 0.3-0.4 Hz. These findings indicate that despite similar increases in total RSNA, external heat results in a greater renal vasoconstrictor response than tail compression due to the activation of a unique population of renal sympathetic nerve fibers with different frequency-response characteristics of the renal vasculature.

  7. Generation of 3D templates of active sites of proteins with rigid prosthetic groups

    OpenAIRE

    Nebel, Jean-Christophe

    2006-01-01

    MOTIVATION: With the increasing availability of protein structures, the generation of biologically meaningful 3D patterns from the simultaneous alignment of several protein structures is an exciting prospect: active sites could be better understood, protein functions and protein 3D structures could be predicted more accurately. Although patterns can already be generated at the fold and topological levels, no system produces high-resolution 3D patterns including atom and cavity positions. To a...

  8. Parallel Processing and Learning: Variability and Chaos in Self- Organization of Activity in Groups of Neurons

    Science.gov (United States)

    1993-03-09

    neurotransmission and neuromodulation (Soinila and Mpitsos, 1992; Soinila ct al., 1992). It is necessary, as these and other publications (e.g., Mpitsos and...neurotransmitters and neuromodulators affect the activity of neural assemblies, and (b) how individual transmitters act within the framework of the many...examined mammalian tissues that may he useful ajs model s~sqerni to examine distributed function in neurotransmission and neuromodulation (Soinila and

  9. The OMERACT Ultrasound Group: status of current activities and research directions

    DEFF Research Database (Denmark)

    Wakefield, Richard J; D'Agostino, Maria-Antonietta; Iagnocco, Annamaria

    2007-01-01

    Ultrasound (US) is a relatively new imaging modality in rheumatology that offers great potential as a diagnostic and management tool. In 2004, an OMERACT Ultrasound Special Interest Group was formed to address the metric qualities of US as a potential outcome measure. A preliminary systematic...... review highlighted the deficiencies in the literature, particularly with regard to the reliability of interpreting and acquiring images; as a consequence, a number of exercises were proposed to address these issues. This report describes a series of iterative studies that have resulted in improved intra...

  10. Strategies toward protecting group-free glycosylation through selective activation of the anomeric center

    Czech Academy of Sciences Publication Activity Database

    Downey, Alan Michael; Hocek, Michal

    2017-01-01

    Roč. 13, Jun 27 (2017), s. 1239-1279 ISSN 1860-5397 R&D Projects: GA TA ČR(CZ) TE01020028 Grant - others:AV ČR(CZ) AP1501 Program:Akademická prémie - Praemium Academiae Institutional support: RVO:61388963 Keywords : glycosides * glycosylation * oligosaccharides * protecting groups Subject RIV: CC - Organic Chemistry OBOR OECD: Organic chemistry Impact factor: 2.337, year: 2016 http://www.beilstein-journals.org/bjoc/articles/13/123

  11. Phytochemical analysis, antioxidant activity, fatty acids composition, and functional group analysis of Heliotropium bacciferum.

    Science.gov (United States)

    Ahmad, Sohail; Ahmad, Shabir; Bibi, Ahtaram; Ishaq, Muhammad Saqib; Afridi, Muhammad Siddique; Kanwal, Farina; Zakir, Muhammad; Fatima, Farid

    2014-01-01

    Heliotropium bacciferum is paramount in medicinal perspective and belongs to Boraginaceae family. The crude and numerous fractions of leaves, stem, and roots of the plant were investigated for phytochemical analysis and DPPH radical scavenging activity. Phytochemical analysis of crude and fractions of the plant revealed the presence of alkaloids, saponins, tannins, steroids, terpenoids, flavonoids, glycosides, and phenols. The antioxidant (free radical scavenging) activity of various extracts of the Heliotropium bacciferum was resolute against 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical with the avail of UV spectrophotometer at 517 nm. The stock solution (1000 mg/mL) and then several dilutions (50, 100, 150, 200, and 250 mg/mL) of the crude and fractions were prepared. Ascorbic acid was used as a standard. The plant leaves (52.59 ± 0.84 to 90.74 ± 1.00), stem (50.19 ± 0.92 to 89.42 ± 1.10), and roots extracts (49.19 ± 0.52 to 90.01 ± 1.02) divulged magnificent antioxidant activities. For the ascertainment of the fatty acid constituents a gas chromatograph hyphenated to mass spectrometer was used. The essential fatty acids for growth maintenance such as linoleic acid (65.70%), eicosadienoic acid (15.12%), oleic acid (8.72%), and palmitic acid (8.14%) were found in high percentage. The infrared spectra of all extracts of the plant were recorded by IR Prestige-21 FTIR model.

  12. The effect of online chronic disease personas on activation: within-subjects and between-groups analyses.

    Science.gov (United States)

    Serio, Catherine Devany; Hessing, Jason; Reed, Becky; Hess, Christopher; Reis, Janet

    2015-02-25

    Although self-management of chronic disease is important, engaging patients and increasing activation for self-care using online tools has proven difficult. Designing more tailored interventions through the application of condition-specific personas may be a way to increase engagement and patient activation. Personas are developed from extensive interviews with patients about their shared values and assumptions about their health. The resulting personas tailor the knowledge and skills necessary for self-care and guide selection of the self-management tools for a particular audience. Pre-post changes in self-reported levels of activation for self-management were analyzed for 11 chronic health personas developed for 4 prevalent chronic diseases. Personas were created from 20 to 25 hour-long nondirected interviews with consumers with a common, chronic disease (eg, diabetes). The interviews were transcribed and coded for behaviors, feelings, and beliefs using the principles of grounded theory. A second group of 398 adults with self-reported chronic disease were recruited for online testing of the personas and their impact on activation. The activation variables, based on an integrated theory of health behavior, were knowledge of a given health issue, perceived self-management skills, confidence in improving health, and intention to take action in managing health. Pre-post changes in activation were analyzed with a mixed design with 1 within-subjects factor (pre-post) and 1 between-group factor (persona) using a general linear model with repeated measures. Sixteen pre-post changes for 4 measures of activation were analyzed. All but 2 of the within-subjects effects were statistically significant and all changes were in the direction of increased activation scores at posttest. Five significant differences between personas were observed, showing which personas performed better. Of low activation participants, 50% or more shifted to high activation across the 4 measures

  13. Human Activity Dampens the Benefits of Group Size on Vigilance in Khulan (Equus hemionus in Western China.

    Directory of Open Access Journals (Sweden)

    Mu-Yang Wang

    Full Text Available Animals receive anti-predator benefits from social behavior. As part of a group, individuals spend less time being vigilant, and vigilance decreases with increasing group size. This phenomenon, called "the many-eyes effect", together with the "encounter dilution effect", is considered among the most important factors determining individual vigilance behavior. However, in addition to group size, other social and environmental factors also influence the degree of vigilance, including disturbance from human activities. In our study, we examined vigilance behavior of Khulans (Equus hemionus in the Xinjiang Province in western China to test whether and how human disturbance and group size affect vigilance. According to our results, Khulan showed a negative correlation between group size and the percentage time spent vigilant, although this negative correlation depended on the groups' disturbance level. Khulan in the more disturbed area had a dampened benefit from increases in group size, compared to those in the undisturbed core areas. Provision of continuous areas of high-quality habitat for Khulans will allow them to form larger undisturbed aggregations and to gain foraging benefits through reduced individual vigilance, as well as anti-predator benefits through increased probability of predator detection.

  14. Human Activity Dampens the Benefits of Group Size on Vigilance in Khulan (Equus hemionus) in Western China.

    Science.gov (United States)

    Wang, Mu-Yang; Ruckstuhl, Kathreen E; Xu, Wen-Xuan; Blank, David; Yang, Wei-Kang

    2016-01-01

    Animals receive anti-predator benefits from social behavior. As part of a group, individuals spend less time being vigilant, and vigilance decreases with increasing group size. This phenomenon, called "the many-eyes effect", together with the "encounter dilution effect", is considered among the most important factors determining individual vigilance behavior. However, in addition to group size, other social and environmental factors also influence the degree of vigilance, including disturbance from human activities. In our study, we examined vigilance behavior of Khulans (Equus hemionus) in the Xinjiang Province in western China to test whether and how human disturbance and group size affect vigilance. According to our results, Khulan showed a negative correlation between group size and the percentage time spent vigilant, although this negative correlation depended on the groups' disturbance level. Khulan in the more disturbed area had a dampened benefit from increases in group size, compared to those in the undisturbed core areas. Provision of continuous areas of high-quality habitat for Khulans will allow them to form larger undisturbed aggregations and to gain foraging benefits through reduced individual vigilance, as well as anti-predator benefits through increased probability of predator detection.

  15. Mediating effects of group cohesion on physical activity and diet in women of color: health is power.

    Science.gov (United States)

    Lee, Rebecca E; O'Connor, Daniel P; Smith-Ray, Renae; Mama, Scherezade K; Medina, Ashley V; Reese-Smith, Jacqueline Y; Banda, Jorge A; Layne, Charles S; Brosnan, Marcella; Cubbin, Catherine; McMillan, Tracy; Estabrooks, Paul A

    2012-01-01

    To determine the effects and mediating factors of a physical activity (PA) or vegetable and fruit (VF) group cohesion intervention. Longitudinal design. Harris County and Travis County, Texas. Community-dwelling African-American and Hispanic or Latina women. Three hundred ten women were randomized to a PA (n  =  204) or VF (n  =  106) intervention group. Women met in groups six times over the course of 6 months and were exposed to a group cohesion intervention to promote walking or to increase VF consumption. Women completed the International PA Questionnaire, National Cancer Institute VF and fat screeners, PA Group Environment Questionnaire, and 7-day accelerometer protocol at baseline and post-intervention. The direct and mediated effects of the intervention on outcomes were evaluated using a mediational chain model, controlling for baseline values and covariates using path analysis. Women were middle aged (mean  =  44.4 years) and overweight or obese (mean body mass index  =  34.0 kg/m(2)). PA increased and fat consumption decreased for both groups, whereas VF consumption increased for women in VF group only (all p psychological and physical health benefits for African-American and Hispanic or Latina women, but refinement of measures and intervention delivery is needed to determine whether hypothesized mediational pathways are valid.

  16. Evolution of division of labor: emergence of different activities among group members.

    Science.gov (United States)

    Nakahashi, Wataru; Feldman, Marcus W

    2014-05-07

    The division of labor is an important component of the organization of human society. However, why this division evolved in hominids requires further investigation. Archeological evidence suggests that it appeared after the emergence of Homo sapiens and contributed to the great success of our species. We develop a mathematical model to investigate under what conditions division of labor should evolve. We assume two types of resources the acquisition of which demands different skills, and study the evolution of the strategy that an individual should use to divide its lifetime into learning and using each skill. We show that division of labor likely evolves when group size is large, skill learning is important for acquiring resources, and there is food sharing within a group. We also investigate division of labor by gender under the assumption that the genders have different efficiencies in acquiring each resource. We show that division of labor by gender likely evolves when skill learning is important and the difference in efficiencies between genders in acquiring resources is large. We discuss how the results of our analysis might apply to the evolution of division of labor in hominids. Copyright © 2014 Elsevier Ltd. All rights reserved.

  17. Creating neighbourhood groupings based on built environment features to facilitate health promotion activities.

    Science.gov (United States)

    Schopflocher, Donald; VanSpronsen, Eric; Spence, John C; Vallianatos, Helen; Raine, Kim D; Plotnikoff, Ronald C; Nykiforuk, Candace I J

    2012-07-26

    Detailed assessments of the built environment often resist data reduction and summarization. This project sought to develop a method of reducing built environment data to an extent that they can be effectively communicated to researchers and community stakeholders. We aim to help in an understanding of how these data can be used to create neighbourhood groupings based on built environment characteristics and how the process of discussing these neighbourhoods with community stakeholders can result in the development of community-informed health promotion interventions. We used the Irvine Minnesota Inventory (IMI) to assess 296 segments of a semi-rural community in Alberta. Expert raters "created" neighbourhoods by examining the data. Then, a consensus grouping was developed using cluster analysis, and the number of IMI variables to characterize the neighbourhoods was reduced by multiple discriminant function analysis. The 296 segments were reduced to a consensus set of 10 neighbourhoods, which could be separated from each other by 9 functions constructed from 24 IMI variables. Biplots of these functions were an effective means of summarizing and presenting the results of the community assessment, and stimulated community action. It is possible to use principled quantitative methods to reduce large amounts of information about the built environment into meaningful summaries. These summaries, or built environment neighbourhoods, were useful in catalyzing action with community stakeholders and led to the development of health-promoting built environment interventions.

  18. OVERVIEW OF THE ACTIVITIES OF THE NUCLEAR ENERGY AGENCY WORKING GROUP ON EXTERNAL EVENTS

    Energy Technology Data Exchange (ETDEWEB)

    Nakoski, John A.; Smith, Curtis L.; Kim, Min Kyu

    2016-10-01

    The Orgranisation for Economic Cooperation and Development (OECD) Nuclear Energy Agency (NEA) has established a Working Group on External Events (WGEV) that provides a forum for subject matter experts from the nuclear industry and regulators to improve the understanding and treatment of external hazards that would support the continued safety performance of nuclear installations, and improve the effectiveness of regulatory practices, in NEA member countries. This report provides a description of the ongoing work of the WGEV. The work of the WGEV includes the collection of information and conducting a workshop on severe weather and storm surge that brought together a diverse group of subject matter experts to identify commendable practices related to the treatment of severe weather and storm surge consideration in regulatory and operational decision-making. Other work of the WGEV includes looking at science-based screening of external events that are factored into decisions on the safe operation of nuclear facilities; and identification of commendable practices and knowledge gaps on riverine flooding.

  19. Understanding neighborhood environment related to Hong Kong children's physical activity: a qualitative study using nominal group technique.

    Directory of Open Access Journals (Sweden)

    Gang He

    Full Text Available BACKGROUND: Relationships between the neighborhood environment and children's physical activity have been well documented in Western countries but are less investigated in ultra-dense Asian cities. The aim of this study was to identify the environmental facilitators and barriers of physical activity behaviors among Hong Kong Chinese children using nominal group technique. METHODS: Five nominal groups were conducted among 34 children aged 10-11 years from four types of neighborhoods varying in socio-economic status and walkability in Hong Kong. Environmental factors were generated by children in response to the question "What neighborhood environments do you think would increase or decrease your willingness to do physical activity?" Factors were prioritized in order of their importance to children's physical activity. RESULTS: Sixteen unique environmental factors, which were perceived as the most important to children's physical activity, were identified. Factors perceived as physical activity-facilitators included "Sufficient lighting", "Bridge or tunnel", "Few cars on roads", "Convenient transportation", "Subway station", "Recreation grounds", "Shopping malls with air conditioning", "Fresh air", "Interesting animals", and "Perfume shop". Factors perceived as physical activity-barriers included "People who make me feel unsafe", "Crimes nearby", "Afraid of being taken or hurt at night", "Hard to find toilet in shopping mall", "Too much noise", and "Too many people in recreation grounds". CONCLUSIONS: Specific physical activity-related environmental facilitators and barriers, which are unique in an ultra-dense city, were identified by Hong Kong children. These initial findings can inform future examinations of the physical activity-environment relationship among children in Hong Kong and similar Asian cities.

  20. Understanding neighborhood environment related to Hong Kong children's physical activity: a qualitative study using nominal group technique.

    Science.gov (United States)

    He, Gang; Cerin, Ester; Huang, Wendy Y; Wong, Stephen H

    2014-01-01

    Relationships between the neighborhood environment and children's physical activity have been well documented in Western countries but are less investigated in ultra-dense Asian cities. The aim of this study was to identify the environmental facilitators and barriers of physical activity behaviors among Hong Kong Chinese children using nominal group technique. Five nominal groups were conducted among 34 children aged 10-11 years from four types of neighborhoods varying in socio-economic status and walkability in Hong Kong. Environmental factors were generated by children in response to the question "What neighborhood environments do you think would increase or decrease your willingness to do physical activity?" Factors were prioritized in order of their importance to children's physical activity. Sixteen unique environmental factors, which were perceived as the most important to children's physical activity, were identified. Factors perceived as physical activity-facilitators included "Sufficient lighting", "Bridge or tunnel", "Few cars on roads", "Convenient transportation", "Subway station", "Recreation grounds", "Shopping malls with air conditioning", "Fresh air", "Interesting animals", and "Perfume shop". Factors perceived as physical activity-barriers included "People who make me feel unsafe", "Crimes nearby", "Afraid of being taken or hurt at night", "Hard to find toilet in shopping mall", "Too much noise", and "Too many people in recreation grounds". Specific physical activity-related environmental facilitators and barriers, which are unique in an ultra-dense city, were identified by Hong Kong children. These initial findings can inform future examinations of the physical activity-environment relationship among children in Hong Kong and similar Asian cities.

  1. Understanding Neighborhood Environment Related to Hong Kong Children’s Physical Activity: A Qualitative Study Using Nominal Group Technique

    Science.gov (United States)

    He, Gang; Cerin, Ester; Huang, Wendy Y.; Wong, Stephen H.

    2014-01-01

    Background Relationships between the neighborhood environment and children’s physical activity have been well documented in Western countries but are less investigated in ultra-dense Asian cities. The aim of this study was to identify the environmental facilitators and barriers of physical activity behaviors among Hong Kong Chinese children using nominal group technique. Methods Five nominal groups were conducted among 34 children aged 10–11 years from four types of neighborhoods varying in socio-economic status and walkability in Hong Kong. Environmental factors were generated by children in response to the question “What neighborhood environments do you think would increase or decrease your willingness to do physical activity?” Factors were prioritized in order of their importance to children’s physical activity. Results Sixteen unique environmental factors, which were perceived as the most important to children’s physical activity, were identified. Factors perceived as physical activity-facilitators included “Sufficient lighting”, “Bridge or tunnel”, “Few cars on roads”, “Convenient transportation”, “Subway station”, “Recreation grounds”, “Shopping malls with air conditioning”, “Fresh air”, “Interesting animals”, and “Perfume shop”. Factors perceived as physical activity-barriers included “People who make me feel unsafe”, “Crimes nearby”, “Afraid of being taken or hurt at night”, “Hard to find toilet in shopping mall”, “Too much noise”, and “Too many people in recreation grounds”. Conclusions Specific physical activity-related environmental facilitators and barriers, which are unique in an ultra-dense city, were identified by Hong Kong children. These initial findings can inform future examinations of the physical activity-environment relationship among children in Hong Kong and similar Asian cities. PMID:25187960

  2. Perceptions of the activity, the social climate, and the self during group exercise classes regulate intrinsic satisfaction.

    Science.gov (United States)

    Maher, Jaclyn P; Gottschall, Jinger S; Conroy, David E

    2015-01-01

    Engaging in regular physical activity is a challenging task for many adults. Intrinsic satisfaction with exercise classes is thought to promote adherence to physical activity. This study examined the characteristics of exercise classes that impact within-person changes in intrinsic satisfaction over the course of an extended group exercise program. A 30-week physical activity trial was conducted with assessments at the end of each class. Community-living adults (n = 29) were instructed to complete at least six group exercise classes each week and, following each exercise class, complete a questionnaire asking about the characteristics of the class and the participant's evaluation of the class. Intrinsic satisfaction was high, on average, but varied as much within-person from class-to-class as it did between exercisers. Participants reported the greatest intrinsic satisfaction when classes placed greater emphasis on exercisers' involvement with the group task, feelings of competence, and encouragement from the instructor. For the most part, exercise classes that were more intense than usual were perceived by exercisers as less intrinsically satisfying. Some overall characteristics of the exercise classes were also associated with intrinsic satisfaction. The social and motivational characteristics of group exercise classes contribute to exercisers' intrinsic satisfaction with classes and attention to those dynamics, as well as the intensity of the exercise, may improve adherence for exercise regimens.

  3. Physical activity in culturally and linguistically diverse migrant groups to Western society: a review of barriers, enablers and experiences.

    Science.gov (United States)

    Caperchione, Cristina M; Kolt, Gregory S; Mummery, W Kerry

    2009-01-01

    A close examination of epidemiological data reveals burdens of disease particular to culturally and linguistically diverse (CALD) migrants, as these individuals adjust to both culture and modernization gaps. Despite the increased risk of hypertension, diabetes mellitus, overweight/obesity and cardiovascular disease, individuals from CALD groups are less likely to be proactive in accessing healthcare or undertaking preventative measures to ensure optimal health outcomes. The purpose of this paper is to review literature that outlines the barriers, challenges and enablers of physical activity in CALD groups who have recently migrated to Western society, and to identify key strategies to increase physical activity participation for these individuals. Electronic and manual literature searches were used to identify 57 publications that met the inclusion criteria. Findings from the review indicate that migration to Western societies has a detrimental effect on the health status and health behaviours of CALD groups as they assimilate to their new surroundings, explore different cultures and customs, and embrace a new way of life. In particular, there is evidence that physical inactivity is common in migrant CALD groups, and is a key contributing risk factor to chronic disease for these individuals. Challenges and barriers that limit physical activity participation in CALD groups include: cultural and religious beliefs, issues with social relationships, socioeconomic challenges, environmental barriers, and perceptions of health and injury. Strategies that may assist with overcoming these challenges and barriers consist of the need for cultural sensitivity, the provision of education sessions addressing health behaviours, encouraging participation of individuals from the same culture, exploration of employment situational variables, and the implementation of 'Health Action Zones' in CALD communities. This information will inform and support the development of culturally

  4. The Use of Group Activities in Introductory Biology Supports Learning Gains and Uniquely Benefits High-Achieving Students

    Directory of Open Access Journals (Sweden)

    Gili Marbach-Ad

    2016-12-01

    Full Text Available This study describes the implementation and effectiveness of small-group active engagement (GAE exercises in an introductory biology course (BSCI207 taught in a large auditorium setting. BSCI207 (Principles of Biology III—Organismal Biology is the third introductory core course for Biological Sciences majors. In fall 2014, the instructors redesigned one section to include GAE activities to supplement lecture content. One section (n = 198 employed three lectures per week. The other section (n = 136 replaced one lecture per week with a GAE class. We explored the benefits and challenges associated with implementing GAE exercises and their relative effectiveness for unique student groups (e.g., minority students, high- and low-grade point average [GPA] students. Our findings show that undergraduates in the GAE class exhibited greater improvement in learning outcomes than undergraduates in the traditional class. Findings also indicate that high-achieving students experienced the greatest benefit from GAE activities. Some at-risk student groups (e.g., two-year transfer students showed comparably low learning gains in the course, despite the additional support that may have been afforded by active learning. Collectively, these findings provide valuable feedback that may assist other instructors who wish to revise their courses and recommendations for institutions regarding prerequisite coursework approval policies.

  5. Advancing environmental and policy change through active living collaboratives: compositional and stakeholder engagement correlates of group effectiveness.

    Science.gov (United States)

    Litt, Jill; Reed, Hannah; Zieff, Susan G; Tabak, Rachel G; Eyler, Amy A; Tompkins, Nancy Oʼhara; Lyn, Rodney; Gustat, Jeanette; Goins, Karen Valentine; Bornstein, Daniel

    2013-01-01

    This study aims to evaluate compositional factors, including collaborative age and size, and community, policy, and political engagement activities that may influence collaboratives' effectiveness in advancing environmental improvements and policies for active living. Structured interviews were conducted with collaboratives' coordinators. Survey items included organizational composition, community, policy, and political engagement activities and reported environmental improvements and policy change. Descriptive statistics and multivariate models were used to investigate these relationships. Environmental improvement and policy change scores reflecting level of collaborative effectiveness across 8 strategy areas (eg, parks and recreation, transit, streetscaping, and land redevelopment). Fifty-nine collaborative groups participated in the interview, representing 22 states. Groups have made progress in identifying areas for environmental improvements and in many instances have received funding to support these changes. Results from multivariate models indicate that engagement in media communication and advocacy was statistically correlated with higher levels of environmental improvement, after adjusting for age of group and area poverty levels (P engagement activities may represent important levers for achieving structural and policy changes to the built environment.

  6. Qualitative evaluation of a physical activity health promotion programme for people with intellectual disabilities in a group home setting.

    Science.gov (United States)

    Dixon-Ibarra, A; Driver, S; Nery-Hurwit, M; VanVolkenburg, H

    2018-01-01

    There is a lack of health promotion programming designed to change the physical activity environment of the group home setting. The Menu-Choice programme assists staff in creating physical activity goals alongside residents with intellectual disabilities and provides strategies to incorporate activity into the group home schedule. The purpose of this study was to complete a process evaluation of Menu-Choice utilizing qualitative methods. Twelve participants, who completed a 10-week pilot intervention (n = 7 staff, mean age 42; n = 5 residents, mean age 52), participated in face-to-face interviews. Participants represented five group home sites involved in the intervention. Meta-themes included: (i) Programme training, (ii) Programme implementation, (iii) Programme physical activity, (iv) Programme barriers, (v) Programme facilitators and (vi) Programme feedback. Changes in programme training and simplified programme materials are needed to accommodate identified barriers for implementation. The importance of obtaining increased agency support and policy change is highlighted. © 2017 John Wiley & Sons Ltd.

  7. Phytochemical Analysis, Antioxidant Activity, Fatty Acids Composition, and Functional Group Analysis of Heliotropium bacciferum

    Directory of Open Access Journals (Sweden)

    Sohail Ahmad

    2014-01-01

    Full Text Available Heliotropium bacciferum is paramount in medicinal perspective and belongs to Boraginaceae family. The crude and numerous fractions of leaves, stem, and roots of the plant were investigated for phytochemical analysis and DPPH radical scavenging activity. Phytochemical analysis of crude and fractions of the plant revealed the presence of alkaloids, saponins, tannins, steroids, terpenoids, flavonoids, glycosides, and phenols. The antioxidant (free radical scavenging activity of various extracts of the Heliotropium bacciferum was resolute against 2,2-diphenyl-1-picrylhydrazyl (DPPH radical with the avail of UV spectrophotometer at 517 nm. The stock solution (1000 mg/mL and then several dilutions (50, 100, 150, 200, and 250 mg/mL of the crude and fractions were prepared. Ascorbic acid was used as a standard. The plant leaves (52.59 ± 0.84 to 90.74 ± 1.00, stem (50.19 ± 0.92 to 89.42 ± 1.10, and roots extracts (49.19 ± 0.52 to 90.01 ± 1.02 divulged magnificent antioxidant activities. For the ascertainment of the fatty acid constituents a gas chromatograph hyphenated to mass spectrometer was used. The essential fatty acids for growth maintenance such as linoleic acid (65.70%, eicosadienoic acid (15.12%, oleic acid (8.72%, and palmitic acid (8.14% were found in high percentage. The infrared spectra of all extracts of the plant were recorded by IR Prestige-21 FTIR model.

  8. Active case finding of tuberculosis in Europe: a Tuberculosis Network European Trials Group (TBNET) survey

    DEFF Research Database (Denmark)

    Bothamley, G.H.; Ditiu, L.; Migliori, G.B.

    2008-01-01

    countries do not, even if the chest radiograph suggests tuberculosis. Nearly all countries (49 out of 50) use tuberculin skin testing (TST); 27 (54%) out of 50 countries also perform chest radiography irrespective of the TST result. Interpretation of the TST varies widely. All countries use 6-9 months...... of isoniazid for treatment of LTBI, with an estimated median (range) uptake of 55% (5-92.5%). Symptoms and sputum examination could be used more widely when screening for active tuberculosis. Treatment of latent tuberculosis infection might be better focused by targeted use of interferon-gamma release assays...

  9. Biological activities of new monohydroxylated brassinosteroid analogues with a carboxylic group in the side chain

    Czech Academy of Sciences Publication Activity Database

    Kvasnica, Miroslav; Oklešťková, Jana; Bazgier, Václav; Rárová, Lucie; Berka, K.; Strnad, Miroslav

    2014-01-01

    Roč. 85, JUL 2014 (2014), s. 58-64 ISSN 0039-128X R&D Projects: GA MŠk LK21306; GA MŠk(CZ) LO1204 Grant - others:GA MŠk ED2.1.00/03.0058 Program:ED Institutional support: RVO:61389030 Keywords : Anticancer activity * Brassinosteroids * Organic synthesis Subject RIV: EF - Botanics Impact factor: 2.639, year: 2014 http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=CCC&DestLinkType=FullRecord&UT=000337652700008

  10. International Working Group on Nuclear Power Plant Control and Instrumentation: Recent activities and future prospects

    International Nuclear Information System (INIS)

    Kossilov, A.

    1992-01-01

    The IWG-NPPCI working group exists to consider developments, disseminate and exchange experience in all aspects of instrumentation, control and information technology relevant to the safety and economics of NPP design and operation. The main topics dealt with are: nuclear instrumentation, control systems, protection systems, early failure detection and diagnosis, use of computer technology in NPP operation, instrumentation for accidental situation, operator support systems, man-machine interface. The main objectives of the IWG-NPPCI are: to assist the IAEA to provide the Member States with information and recommendations on technical aspects of the NPP control and instrumentation with the aim to assure reliable functions; to promote and exchange of information on national programs, new developments and experience from operating NPPs, and to stimulate the coordination of research on NPP control and instrumentation

  11. International Working Group on Nuclear Power Plant Control and Instrumentation: Recent activities and future prospects

    Energy Technology Data Exchange (ETDEWEB)

    Kossilov, A [International Atomic Energy Agency, Vienna (Austria)

    1992-07-01

    The IWG-NPPCI working group exists to consider developments, disseminate and exchange experience in all aspects of instrumentation, control and information technology relevant to the safety and economics of NPP design and operation. The main topics dealt with are: nuclear instrumentation, control systems, protection systems, early failure detection and diagnosis, use of computer technology in NPP operation, instrumentation for accidental situation, operator support systems, man-machine interface. The main objectives of the IWG-NPPCI are: to assist the IAEA to provide the Member States with information and recommendations on technical aspects of the NPP control and instrumentation with the aim to assure reliable functions; to promote and exchange of information on national programs, new developments and experience from operating NPPs, and to stimulate the coordination of research on NPP control and instrumentation.

  12. Soil microbial activity, mycelial lengths and physiological groups of bacteria in a heavy metal polluted area

    Energy Technology Data Exchange (ETDEWEB)

    Nordgren, A; Kauri, T; Baeaeth, E; Soederstroem, B

    1986-01-01

    The biological effects of heavy metal contamination of coniferous forest soils were studied in the A/sub 01//A/sub 02/ layer around a primary smelter in Northern Sweden. Soil concentrations of 17 elements were determined. Smelter-emitted heavy metals were 5 to 75 times higher in the plot closest to the smelter compared with background levels. Despite emission of sulfur no decrease in pH was found. Bacteria producing acid from maltose, cellobiose, arabinose or xylose and bacteria hydrolyzing starch, pectin, xyland or cellulose decreased 8- to 11-fold due to the soil contamination. Chitin hydrolyzers were 5 times less abundant at the most polluted site compared with background levels. Soil respiration rate and urease activity decreased by about a factor of 4, but phosphatase activity and mycelial lengths were unaffected by the soil contamination. Soil bacteria showed a sigmoidal response to the log of metal concentration in the soil and were affected at a lower pollution level than the other biological variables in the study. A multivariate analysis (partial least squares) showed that soil metal contamination and soil pH were the two environmental factors influencing the soil microorganisms.

  13. Activation barriers for series of exothermic homologous reactions. V. Boron group diatomic species reactions

    Science.gov (United States)

    Blue, Alan S.; Belyung, David P.; Fontijn, Arthur

    1997-09-01

    Semiempirical configuration interaction (SECI) theory is used to predict activation barriers E, as defined by k(T)=ATn exp(-E/RT). Previously SECI has been applied to homologous series of oxidation reactions of s1, s2, and s2p1 metal atoms. Here it is extended to oxidation reactions of diatomic molecules containing one s2p1 atom. E values are calculated for the reactions of BH, BF, BCl, AlF, AlCl, AlBr, GaF, GaI, InCl, InBr, InI, TlF, TlCl, TlBr, and TlI with O2, CO2, SO2, or N2O. These values correlate with the sums of the ionization potentials and Σ-Π promotion energies of the former minus the electron affinities of the latter. In the earlier work n was chosen somewhat arbitrarily, which affected the absolute values of E. Here it is shown that examination of available experimental and theoretical results allows determination of the best values of n. Using this approach yields n=1.9 for the present series. For the seven reactions which have been studied experimentally, the average deviation of the SECI activation barrier prediction from experiment is 4.0 kJ mol-1. Energy barriers are calculated for another 52 reactions.

  14. Unspoken Playground Rules Discourage Adolescent Physical Activity in School: A Focus Group Study of Constructs in the Prototype Willingness Model.

    Science.gov (United States)

    Wheatley, Catherine M; Davies, Emma L; Dawes, Helen

    2018-03-01

    The health benefits of exercise in school are recognized, yet physical activity continues to decline during early adolescence despite numerous interventions. In this study, we investigated whether the prototype willingness model, an account of adolescent decision making that includes both reasoned behavioral choices and unplanned responses to social environments, might improve understanding of physical activity in school. We conducted focus groups with British pupils aged 12 to 13 years and used deductive thematic analysis to search for themes relating to the model. Participants described reasoned decisions about physical activity outside school and unplanned choices to be inactive during break, in response to social contexts described as more "judgmental" than in primary school. Social contexts appeared characterized by anxiety about competence, negative peer evaluation, and inactive playground norms. The prototype willingness model might more fully explain physical activity in school than reasoned behavioral models alone, indicating potential for interventions targeting anxieties about playground social environments.

  15. COMPARISON OF LEVELS OF SELF-ESTEEM BY SEX AND LEVEL OF PHYSICAL ACTIVITY IN TWO GROUPS OF SENIOR ADULTS

    Directory of Open Access Journals (Sweden)

    Diego Rodríguez Méndez

    2016-08-01

    Full Text Available The purpose of this study is to observe whether there are differences in the self-esteem score, depending on the level of physical activity (active-sedentary in a sample of senior adults. Twenty-six senior adults participated in the study with an average of 73 ± 9 years of age. The sedentary group (n = 12 belonged to the Santo Domingo Nursing Home in Heredia, Costa Rica, while the active group belonged to the project entitled Modulation of the Aging Process of the Movement for Life Program. Results: No significant differences were found in scores by level of physical activity (t = 0.931, p = 0.363; however, there were significant differences in self-esteem scores by gender (t = -2.255, p = 0.034. It was concluded that the level of physical activity does not affect self-esteem and that men’s level of self-esteem is higher than women’s.

  16. M-ficolin, an innate immune defence molecule, binds patterns of acetyl groups and activates complement

    DEFF Research Database (Denmark)

    Frederiksen, Pernille Dorthea; Thiel, Steffen; Larsen, Claus Bindslev

    2005-01-01

    Ficolins play a role in the innate immune defence as pathogen-associated molecular pattern recognition molecules. Three ficolins are found in humans: H-ficolin, L-ficolin and M-ficolin. L-ficolin and H-ficolin circulate in blood in complexes with mannan-binding lectin-associated serine proteases...... (MASPs) and are capable of activating the complement system. L-ficolin shows affinity for acetylated compounds and binds to various capsulated strains of bacteria. H-ficolin has been shown to bind Aerococcus viridans. Less is known about M-ficolin, but it is thought to be present only on monocytes. We...... system. We developed a monoclonal rat anti-human-M/L-ficolin antibody and verified by flow cytometric analysis the presence of ficolin on the surface of peripheral blood monocytes....

  17. Predicting the activity of drugs for a group of imidazopyridine anticoccidial compounds.

    Science.gov (United States)

    Si, Hongzong; Lian, Ning; Yuan, Shuping; Fu, Aiping; Duan, Yun-Bo; Zhang, Kejun; Yao, Xiaojun

    2009-10-01

    Gene expression programming (GEP) is a novel machine learning technique. The GEP is used to build nonlinear quantitative structure-activity relationship model for the prediction of the IC(50) for the imidazopyridine anticoccidial compounds. This model is based on descriptors which are calculated from the molecular structure. Four descriptors are selected from the descriptors' pool by heuristic method (HM) to build multivariable linear model. The GEP method produced a nonlinear quantitative model with a correlation coefficient and a mean error of 0.96 and 0.24 for the training set, 0.91 and 0.52 for the test set, respectively. It is shown that the GEP predicted results are in good agreement with experimental ones.

  18. Strategic Ambidexterity Learning of Innovation Activities: A Study of Indonesian Business Group Leader

    Directory of Open Access Journals (Sweden)

    Retno Kusumastuti

    2018-03-01

    Full Text Available Competitive advantage refers to the attributes an organization maintains to better perform in comparison to its competitors. According to the Resource Based View, human capital has become a source of competitive advantage. Literatures exploring how strategic leadership leads to ambidexterity practice is still very rare. Ambidexterity practices is about how organizations learn to conduct innovation activities in both exploitative and explorative manner. A prominent leader should have influence on innovation activities in their organization through the decisions they have made. This study analyzed how a corporation had implemented ambidexterity learning practices to create competitive advantage based on the leader’s cognitive map. A leader’s cognitive map is a mental construct that represents the way the leader thinks in order to deal with the prevailing environment. The dynamics of the cognitive leader is portrayed by conversing the entrepreneur’s cognitive map using the Normalized Unit Modeling by Elementary Relationship (NUMBER. This research was conducted with Lippo Karawaci (LPKR serving as the object of study. LPKR’s success is without a doubt inseparable from the role of its leader. The results of this research show that learning process and ongoing participation based on culture to pursue competitive advantage in ambidexterity practices had occurred in LPKR. Furthermore, this study shows the importance of strategic orientation in ambidexterity learning process through proper management of the company’s resources. The identified strategic directions—human resource, technology, profitability, and entrepreneurship— may be considered as sources of competitive advantage. This research is of significant value as it presents how a big corporation, such as LPKR, constantly creates new opportunities through exploratory and exploitative innovations and learning process simultaneously thereby becoming an ambidextrous organization.

  19. Cesium 137 body activity in a group of children coming from affected areas due to Chernobyl accident

    International Nuclear Information System (INIS)

    Cruz, R.; Lopez, G.; Arado, O.; Jova, L.; Corripio, A.

    1994-01-01

    The implementation and calibration of two whole body counters for determination of Cs-137 body burden of children is describe. The results of measurements of 4506 children coming from affected areas due to Chernobyl accident of the Republics of Ukrainian, Russian and Belaruss, and who received medical attention in Cuba is presented. Installations, equipment and calibration phantoms used are described. The values of measured activity is relationed whit the place of origin groups of age and the form of feeding. The measured activity values range from 1,5 to 565 Bq/kg, and have a long-normal character for each region

  20. Working group report on beam plasmas, electronic propulsion, and active experiments using beams

    Science.gov (United States)

    Dawson, J. M.; Eastman, T.; Gabriel, S.; Hawkins, J.; Matossian, J.; Raitt, J.; Reeves, G.; Sasaki, S.; Szuszczewicz, E.; Winkler, J. R.

    1986-01-01

    The JPL Workshop addressed a number of plasma issues that bear on advanced spaceborne technology for the years 2000 and beyond. Primary interest was on the permanently manned space station with a focus on identifying environmentally related issues requiring early clarification by spaceborne plasma experimentation. The Beams Working Group focused on environmentally related threats that platform operations could have on the conduct and integrity of spaceborne beam experiments and vice versa. Considerations were to include particle beams and plumes. For purposes of definition it was agreed that the term particle beams described a directed flow of charged or neutral particles allowing single-particle trajectories to represent the characteristics of the beam and its propagation. On the other hand, the word plume was adopted to describe a multidimensional flow (or expansion) of a plasma or neutral gas cloud. Within the framework of these definitions, experiment categories included: (1) Neutral- and charged-particle beam propagation, with considerations extending to high powers and currents. (2) Evolution and dynamics of naturally occurring and man-made plasma and neutral gas clouds. In both categories, scientific interest focused on interactions with the ambient geoplasma and the evolution of particle densities, energy distribution functions, waves, and fields.

  1. Activities of the Shielding Subcommittee of the ENDF/B Cross Section Evaluation Working Group

    International Nuclear Information System (INIS)

    Roussin, R.W.

    1977-01-01

    The Shielding Subcommittee of the Cross Section Evaluation Working Group (CSEWG) was established in 1967 to help ensure that the content of the ENDF/B cross section library was adequate for treating shielding problems. Early work of the subcommittee concentrated on devising formats for gamma-ray interaction and production data, as well as providing programs for testing the clerical and physics consistency of the files. The Radiation Shielding Information Center (RSIC) collaborated directly with evaluators on behalf of the National Neutron Cross Section Center (NNCSC) to begin testing and adding data sets to be fed into the official ENDF/B libraries. These efforts, which were sponsored by AEC-DRDT (now ERDA-DRDD), were augmented greatly through the Defense Nuclear Agency program of establishing a working cross section library in ENDF format. The effort concentrated on evaluation and testing of materials of interest to DNA programs and providing these for inclusion in the ENDF/B library. Shielding data testing efforts, as a part of the CSEWG Data Testing Program, are now also an integral part of the Shielding Subcommittee effort. Procedures for writing and approving the shielding benchmarks were devised by Shielding Subcommittee members. Data testing benchmark experiments have been documented and analyzed, and the most recent results for ENDF/B-IV are as reported as part of ENDF-230, ''Benchmark Testing of ENDF/B-IV.''

  2. EFNEP graduates' perspectives on social media to supplement nutrition education: focus group findings from active users.

    Science.gov (United States)

    Leak, Tashara M; Benavente, Lisa; Goodell, L Suzanne; Lassiter, Annie; Jones, Lorelei; Bowen, Sarah

    2014-01-01

    To identify ways to effectively use social media to communicate nutrition-related information to low-income populations. The authors conducted 4 focus groups with female Expanded Food and Nutrition Education Program graduates who used social media at least twice a week (n = 26 total). Transcripts were analyzed using the constant comparative method to identify key themes. For participants, page content, page maintenance, and networking opportunities with others were important aspects of a nutrition education social media page. Trust emerged as a central theme, because participants expressed a need for reliable information from known, credible sources and safe places to share ideas. Using social media to provide nutrition-related messages may be an effective way to encourage sustained positive behavior changes resulting from educational programming and to engage participants beyond class time. Establishing the trustworthiness of the social media site is essential to its use among low-income participants. Copyright © 2014 Society for Nutrition Education and Behavior. Published by Elsevier Inc. All rights reserved.

  3. Research activities in our laser R and D group (present and future)

    International Nuclear Information System (INIS)

    Sugiyama, Akira; Kondo, Kiminori; Kiriyama, Hiromitsu; Ochi, Yoshihiro; Tanaka, Momoko; Nakai, Yoshiki; Sasao, Hajime; Tateno, Ryo; Okada, Hajime; Koike, Masato

    2010-01-01

    Our group has been newly established in this April to develop next high peak power laser systems which can be used for innovative applications. We have developed essential technologies for the upgrade of laser performances in J-KAREN and TOPAZ laser systems in order to supply these advanced laser beams for application studies such as laser acceleration, high optical field science, highly intense X-ray generation, and so on. In the development of J-KAREN laser, we achieved high contrast ratio of over 10 10 by employing OPCPA technique. While in the TOPAZ laser, 0.1 Hz operation was realized with a development of zigzag slab type glass laser which can reduce thermal distortion inside the excited laser medium. This repetition rate was increased by two orders of magnitude compared to previous rod type glass laser system. Using the TOPAZ laser, we have succeeded to generate 13.9-nm x-ray laser beam with beam divergence less than 0.5 mrad at a repetition rate of 0.1 Hz. (author)

  4. Quantitative analysis of hepatitis C virus activity in vivo in different groups of untreated patients.

    Science.gov (United States)

    Manzin, A; Solforosi, L; Giostra, F; Bianchi, F B; Bruno, S; Rossi, S; Gabrielli, A; Candela, M; Petrelli, E; Clementi, M

    1997-01-01

    Highly sensitive competitive PCR (cPCR) and competitive reverse transcription PCR (cRT-PCR) methodologies were recently developed and applied for quantifying viral DNA and RNA species (including HCV RNA) present in clinical samples at low concentration. In this study, we used cRT-PCR to compare the viral load of 118 untreated patients with HCV infection and different clinical conditions (80 patients with chronic hepatitis, 18 infected subjects with persistently normal ALT levels and various degrees of liver injury, 10 HCV infected subjects that tested positive for anti-LKM1 antibodies, and 10 patients with HCV infection and cryoglobulinemia). The results indicate that while great individual variability of HCV viremia is detectable even among patients with similar clinical conditions, the mean HCV RNA copy number in samples from patients with different clinical conditions was similar in all groups with the single exception of patients that tested positive for anti-liver-kidney microsomal auto-antibodies type 1 (anti-LKM1); interestingly, lower HCV viremia levels were revealed in these anti-LKM1-positive cases with liver disease of uncertain pathogenesis.

  5. Activity of the Delayed Neutron Working Group of JNDC and the International Evaluation Cooperation - WPEC/SG6

    International Nuclear Information System (INIS)

    Yoshida, Tadashi

    1999-01-01

    The Delayed Neutron Working Group was established in April 1997 within the Nuclear Data Subcommittee of JNDC. It has two principal missions. One is to coordinate the Japanese activities toward the WPEC/Subgroup-6 efforts, and the other is to recommend the delayed neutron data for JENDL-3.3. The final report of Subgroup-6, which in one of the subgroups of the NEA International Evaluation Cooperation (WPEC) and is in charge of the delayed neutron data, is to be completed in 1999. Here in Japan, JENDL-3.3 is planned to be released in early 2000. Delayed Neutron Working Group is, then, going to finalize its activity by the end of the fiscal year 1999 after recommending appropriate sets of data as coherently as possible with the of Subgroup-6 efforts. (author)

  6. The effect of subminimal inhibitory concentrations of penicillin on growth rate and haemolysin activity of group G Streptococcus

    Directory of Open Access Journals (Sweden)

    Verônica V. Vieira

    1993-09-01

    Full Text Available The influence of the subminimal inhibitory concentrations (1/3 and 1/4 of the MIC of penicillin on growth rate and on haemolysin production of a strain of group G Streptococcus was studied. It was shown that 1/3 of the MIC almost completely inhibited the bacterial growth, but it was not able to inhibit haemolysin activity in the culture supernate. The generation time of bacteria grown in 1/4 of the MIC was approximately twice longer than that of the control culture. In all cultures, the haemolysin, after being produced (or liberated, reached a peak and decreased to low levels, which could suggest that group G Streptococcus produces some end products of metabolism that are able to inhibit haemolysin activity.

  7. The Activity Support Scale for Multiple Groups (ACTS-MG): Child-reported Physical Activity Parenting in African American and Non-Hispanic White Families.

    Science.gov (United States)

    Lampard, Amy M; Nishi, Akihiro; Baskin, Monica L; Carson, Tiffany L; Davison, Kirsten K

    2016-01-01

    This study aimed to assess the psychometric properties of a child-report, multidimensional measure of physical activity (PA) parenting, the Activity Support Scale for Multiple Groups (ACTS-MG), in African American and non-Hispanic white families. The ACTS-MG was administered to children aged 5 to 12 years. A three factor model of PA parenting (Modeling of PA, Logistic Support, and Restricting Access to Screen-based Activities) was tested separately for mother's and fathers' PA parenting. The proposed three-factor structure was supported in both racial groups for mothers' PA parenting and in the African American sample for fathers' PA parenting. Factorial invariance between racial groups was demonstrated for mother's PA parenting. Building on a previous study examining the ACTS-MG parent-report, this study supports the use of the ACTS-MG child-report for mothers' PA parenting. However, further research is required to investigate the measurement of fathers' PA parenting across racial groups.

  8. Recent activities of the international Group on Research Reactors (IGORR) and of the Advanced Neutron Source (ANS)

    International Nuclear Information System (INIS)

    West, C.D.

    1992-01-01

    The International Group on Research Reactors (IGORR) was formed in 1990 to facilitate the sharing of knowledge and experience among those institutions and individuals who are actively working to design, build, and promote new research reactors or to make significant upgrades to existing facilities. The Advanced Neutron Source Project expects to complete conceptual design in mid-1992. In the present design concept, the neutron source is a heavy-water-cooled, moderated, and reflected reactor of about 350 MW(f) power. (author)

  9. Recovering Physical Activity Missing Data Measured by Accelerometers: A Comparison of Individual and Group-Centered Recovery Methods

    Science.gov (United States)

    Zhuang, Jie; Chen, Peijie; Wang, Chao; Jin, Jing; Zhu, Zheng; Zhang, Wenjie

    2013-01-01

    Purpose: The purpose of this study was to determine which method, individual information-centered (IIC) or group information-centered (GIC), is more efficient in recovering missing physical activity (PA) data. Method: A total of 2,758 Chinese children and youth aged 9 to 17 years old (1,438 boys and 1,320 girls) wore ActiGraph GT3X/GT3X+…

  10. Group separation of rare earth elements by liquid-liquid extraction for the neutron activation analysis of silicate rocks

    International Nuclear Information System (INIS)

    Wyttenbach, A.; Bajo, S.; Tobler, L.

    1983-01-01

    Rare earth elements are isolated as a group from neutron activated rock samples by a new radiochemical procedure based on extraction with thenoyltrifluoracetone/phenanthroline in CHCl 3 . The procedure consists of three extraction steps, obviates the use of inactive carriers and gives practically quantitative chemical yields, thereby avoiding fractionation of the individual rare earths. Details of the dissolution, chemical separations. and counting procedure are given together with an analysis of BCR-1. (author)

  11. Immunological evaluation of lipopeptide group A streptococcus (GAS vaccine: structure-activity relationship.

    Directory of Open Access Journals (Sweden)

    Mehfuz Zaman

    Full Text Available Streptococcus pyogenes (group A streptococcus, GAS is a Gram-positive bacterial pathogen responsible for a wide variety of diseases. To date, GAS vaccine development has focused primarily on the M-protein. The M-protein is highly variable at the amino (N-terminus (determining serotype but is conserved at the carboxyl (C-terminus. Previously a 29 amino acid peptide (named J14 from the conserved region of the M-protein was identified as a potential vaccine candidate. J14 was capable of eliciting protective antibodies that recognized many GAS serotypes when co-administered with immuno-stimulants. This minimal epitope however showed no immunogenicity when administered alone. In an attempt overcome this immunological non-responsiveness, we developed a self-adjuvanting vaccine candidate composed of three components: the B-cell epitope (J14, a universal helper T-cell epitope (P25 and a lipid moiety consisting of lipoamino acids (Laas which target Toll-like receptor 2 (TLR2. Immunological evaluation in B10.BR (H-2k mice demonstrated that the epitope attachment to the point of lipid moiety, and the length of the Laa alkyl chain have a profound effect on vaccine immunogenicity after intranasal administration. It was demonstrated that a vaccine featuring C-terminal lipid moiety containing alkyl chains of 16 carbons, with P25 located at the N-terminus, and J14 attached to the side chain of a central lysine residue was capable of inducing optimal antibody response. These findings have considerable relevance to the development of a broad spectrum J14-based GAS vaccine and in particular provided a rational basis for peptide vaccine design based on this self-adjuvanting lipopeptide technology.

  12. Below Regulatory Concern Owners Group: An evaluation of dry active waste sorting: Final report

    International Nuclear Information System (INIS)

    Casey, S.M.

    1989-02-01

    The objective of this research was to determine the accuracy of manual inspection of Dry Active Waste (DAW). Three studies were conducted at two nuclear power plants in which unmodified DAW waste streams of roughly 10,000 items each were inspected by technicians using pancake probes. Sorting performance was measured unobtrusively by intercepting the ''outflow'' from inspection stations. Verification of sorting accuracy was performed with a prototype, semi-automated sorting table employing a matrix of fixed plastic scintillation detectors. More than 30,000 items of trash were examined, classified, counted, and verified, and the composition of the ''inflow'' to the inspection stations was determined by reconstructing the ''outflow'' components, as determined during verification procedures. The results showed that between 1 and 19% of all items in each of the three DAW waste streams were contaminated at levels ≥100 ccpm. Sixty-two percent of the ''contaminated'' items in Study I, 87% of the contaminated items in Study II, and 97% of the contaminated items in Study III were detected. One-half to one percent of all items classified as <100 ccpm by technicians were actually ≥100 ccpm. False positive rates were very high in all three studies. The production rates and accuracy obtained on the semi-automated plastic scintillation sorting table used during the verification stages of this project greatly exceeded the rates for manual sorting. 9 figs., 13 tabs

  13. The active galactic nucleus population in X-ray-selected galaxy groups at 0.5 < Z < 1.1

    International Nuclear Information System (INIS)

    Oh, Semyeong; Woo, Jong-Hak; Matsuoka, Kenta; Mulchaey, John S.; Finoguenov, Alexis; Tanaka, Masayuki; Cooper, Michael C.; Ziparo, Felicia; Bauer, Franz E.

    2014-01-01

    We use Chandra data to study the incidence and properties of active galactic nuclei (AGNs) in 16 intermediate redshift (0.5 < z < 1.1) X-ray-selected galaxy groups in the Chandra Deep Field-South. We measure an AGN fraction of f(L X,H >10 42 ;M R <−20)=8.0 −2.3 +3.0 % at z-bar ∼0.74, approximately a factor of two higher than the AGN fraction found for rich clusters at comparable redshift. This extends the trend found at low redshift for groups to have higher AGN fractions than clusters. Our estimate of the AGN fraction is also more than a factor of three higher than that of low redshift X-ray-selected groups. Using optical spectra from various surveys, we also constrain the properties of emission-line selected AGNs in these groups. In contrast to the large population of X-ray AGNs (N(L X, H > 10 41 erg s –1 ) = 25), we find only four emission-line AGNs, three of which are also X-ray bright. Furthermore, most of the X-ray AGNs in our groups are optically dull (i.e., lack strong emission-lines), similar to those found in low redshift X-ray groups and clusters of galaxies. This contrasts with the AGN population found in low redshift optically selected groups which are dominated by emission-line AGNs. The differences between the optically and X-ray-selected AGNs populations in groups are consistent with a scenario where most AGNs in the densest environments are currently in a low accretion state.

  14. Breast cancer survivors' barriers and motives for participating in a group-based physical activity program offered in the community.

    Science.gov (United States)

    Wurz, Amanda; St-Aubin, Anik; Brunet, Jennifer

    2015-08-01

    The purpose of this qualitative study was to explore the barriers and motives experienced by women attending an 8-week group-based physical activity program offered in the community following treatment for breast cancer. Seven women were interviewed during the first and last week of the program. Data were analyzed using thematic analysis. Factors that hindered women's continued participation could be subdivided into situational barriers, which encompassed community (i.e., distance of center and traffic) and institutional factors (i.e., competing roles and responsibilities), and internal barriers, which consisted of cancer-specific limitations. Motives for initial and continued participation were situational (i.e., gaining social support, networking, and being around similar others) and internal (i.e., feeling a sense of personal fulfillment, acquiring health benefits, and recovering from cancer). The findings contribute to a deeper understanding of women's motives to engage in a group-based physical activity program after treatment for breast cancer. Further, they underscore the necessity of considering situational and internal barriers when developing group-based physical activity programs to increase regular participation, optimize adherence, and reduce drop-out.

  15. In vitro anti-mycobacterial activity of nine medicinal plants used by ethnic groups in Sonora, Mexico.

    Science.gov (United States)

    Robles-Zepeda, Ramón Enrique; Coronado-Aceves, Enrique Wenceslao; Velázquez-Contreras, Carlos Arturo; Ruiz-Bustos, Eduardo; Navarro-Navarro, Moisés; Garibay-Escobar, Adriana

    2013-11-25

    Sonoran ethnic groups (Yaquis, Mayos, Seris, Guarijíos, Pimas, Kikapúes and Pápagos) use mainly herbal based preparations as their first line of medicinal treatment. Among the plants used are those with anti-tuberculosis properties; however, no formal research is available. Organic extracts were obtained from nine medicinal plants traditionally used by Sonoran ethnic groups to treat different kinds of diseases; three of them are mainly used to treat tuberculosis. All of the extracts were tested against Mycobacterium tuberculosis H37Rv using the Alamar Blue redox bioassay. Methanolic extracts from Ambrosia confertiflora, Ambrosia ambrosioides and Guaiacum coulteri showed minimal inhibitory concentration (MIC) values of 200, 790 and 1000 μg/mL, respectively, whereas no effect was observed with the rest of the methanolic extracts at the concentrations tested. Chloroform, dichloromethane, and ethyl acetate extracts from Ambrosia confertiflora showed a MIC of 90, 120 and 160 μg/mL, respectively. A. confertiflora and A. ambrosioides showed the best anti-mycobacterial activity in vitro. The activity of Guaiacum coulteri is consistent with the traditional use by Sonoran ethnic groups as anti-tuberculosis agent.For these reasons, it is important to investigate a broader spectrum of medicinal plants in order to find compounds active against Mycobacterium tuberculosis.

  16. Relating group size and posting activity of an online community of financial investors: Regularities and seasonal patterns

    Science.gov (United States)

    Racca, P.; Casarin, R.; Dondio, P.; Squazzoni, F.

    2018-03-01

    Group size can potentially affect collective activity and individual propensity to contribute to collective goods. Mancur Olson, in his Logic of Collective Action, argued that individual contribution to a collective good tends to be lower in groups of large size. Today, online communication platforms represent an interesting ground to study such collaborative dynamics under possibly different conditions (e.g., lower costs related to gather and share information). This paper examines the relationship between group size and activity in an online financial forum, where users invest time in sharing news, analysis and comments with other investors. We looked at about 24 million messages shared in more than ten years in the finanzaonline.com online forum. We found that the relationship between the number of active users and the number of posts shared by those users is of the power type (with exponent α > 1) and is subject to periodic fluctuations, mostly driven by hour-of-the-day and day-of-the-week effects. The daily patterns of the exponent showed a divergence between working week and weekend days. In general, the exponent was lower before noon, where investors are typically interested in market news, higher in the late afternoon, where markets are closing and investors need better understanding of the situation. Further research is needed, especially at the micro level, to dissect the mechanisms behind these regularities.

  17. Practical routes to (SiH₃)₃P: applications in group IV semiconductor activation and in group III-V molecular synthesis.

    Science.gov (United States)

    Tice, Jesse B; Chizmeshya, A V G; Tolle, J; D' Costa, V R; Menendez, J; Kouvetakis, J

    2010-05-21

    The (SiH₃)₃P hydride is introduced as a practical source for n-doping of group IV semiconductors and as a highly-reactive delivery agent of -(SiH₃)₂P functionalities in exploratory synthesis. In contrast to earlier methods, the compound is produced here in high purity quantitative yields via a new single-step method based on reactions of SiH₃Br and (Me₃Sn)₃P, circumventing the need for toxic and unstable starting materials. As an initial demonstration of its utility we synthesized monosubstituted Me₂M-P(SiH₃)₂ (M = Al, Ga, In) derivatives of Me₃M containing the (SiH₃)₂P ligand for the first time, in analogy to the known Me₂M-P(SiMe₃)₂ counterparts. A dimeric structure of Me₂M-P(SiH₃)₂ is proposed on the basis of spectroscopic characterizations and quantum chemical simulations. Next, in the context of materials synthesis, the (SiH₃)₃P compound was used to dope germanium for the first time by building a prototype p(++)Si(100)/i-Ge/n-Ge photodiode structure. The resultant n-type Ge layers contained active carrier concentrations of 3-4 × 10¹⁹ atoms cm⁻³ as determined by spectroscopic ellipsometry and confirmed by SIMS. Strain analysis using high resolution XRD yielded a Si content of 4 × 10²⁰ atoms cm⁻³ in agreement with SIMS and within the range expected for incorporating Si₃P type units into the diamond cubic Ge matrix. Extensive characterizations for structure, morphology and crystallinity indicate that the Si co-dopant plays essentially a passive role and does not compromise the device quality of the host material nor does it fundamentally alter its optical properties.

  18. Dinámica trófica, estrategias de consumo y alteraciones óseas en la sabana africana: resumen de un proyecto de investigación etoarqueológico (1991-1993

    Directory of Open Access Journals (Sweden)

    Domínguez-Rodrigo, Manuel

    1994-06-01

    Full Text Available The main results of a broad etho-archaeological research carried out in East Africa are succintly exposed. These provide an accurate explanation of the behavior exhibited by the main savanna and steppe predators with regard fo the process of carcass consumption, thereby creating a referential framework that can be useful for taphonomists. Carnivore behavior is accounted for in terms of its contextual variability, due to the changing selective pressure according to trophic dynamics. Therefore, the adaptive patterns of each predator are discussed and special emphasis is laid on the role played by ecology in shaping their behavior. Initial consumption strategies, bone accumulating agencies and contexts, the predatory range of each predator and bone modification patterns are the main subjects treated. As an innovative complement to these issues, the spatial analysis of bon

    Se exponen los principales resultados de un amplio proyecto de investigación etoarqueológica llevado a cabo en África oriental. Estos sirven de base para la interpretación del comportamiento de los predadores de sabana y estepa, con respecto al proceso de consumo de sus presas, creando al mismo tiempo un marco referencial de gran utilidad para la Tafonomía. El comportamiento de los carnívoros se explica en términos de su variabilidad contextual, debida a la modificación de la presión selectiva según la dinámica trófica. Por consiguiente, se discuten los principales patrones adaptativos de estos predadores y se pone especial énfasis en el papel jugado por la ecología en la conducta que exhibe cada uno de ellos. Las principales cuestiones tratadas son las estrategias iniciales de consumo, los agentes y contextos que generan acumulaciones óseas, el espectro cinegético de cada carnívoro y los patrones de alteración ósea. Como complemento innovador a estos temas, se presenta también el análisis espacial de dispersión de restos debido a la acción de los

  19. MAÍZ EN ASOCIACIÓN Y ROTACIÓN CON FABÁCEAS EN SUELOS ÁCIDOS DE LA SABANA DE HUIMANGUILLO, TABASCO, MEXICO

    Directory of Open Access Journals (Sweden)

    Samuel Córdova Sánchez

    2012-12-01

    Full Text Available La asociación de cultivos es una alternativa para mejorar la fertilidad de los suelos ácidos del trópico húmedo. El objetivo de este trabajo fue evaluar el comportamiento del maíz (Zea mays L. cultivado en asociación y rotación con fabáceas en suelos ácidos de sabana. Los tratamientos se establecieron en un diseño de bloques completos al azar, con cuatro repeticiones. Las variables evaluadas en el maíz fueron materia seca, rendimiento de grano y nitrógeno total; en las fabáceas fueron materia fresca, materia seca, nódulos, nitrógeno total y nitrógeno fijado. Los resultados muestran que los cuatro genotipos de maíz en asociación presentaron mayor rendimiento de grano, materia seca y nitrógeno total respecto a sus testigos. Los maíces asociados a C. cajan presentaron mayor producción de materia seca de planta, de brácteas y materia seca total. El maíz HQ4-C presentó mayor contenido de materia seca, grano y nitrógeno total. El maíz criollo presentó la más alta producción de materia seca. Por otra parte, las fabáceas en asociación presentaron los valores más altos en todas las variables evaluadas, respecto a sus testigos no asociados. Con la variedad de maíz S03 las fabáceas presentaron el más alto número de nódulos, nitrógeno total y nitrógeno fijado.

  20. Identificación de Mycobacterium sp., en una población de tortugas morrocoy (Geochelone carbonaria en cautiverio y en su entorno, en un zoológico en la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Ángela Natalia Agudelo

    2008-06-01

    Full Text Available En un Zoológico de la Sabana de Bogotá, se presentó alta mortalidad de aves por tuberculosis aviar, en un encierro en el cual habitaban dos clases de animales diferentes: reptiles y aves. Se buscó establecer la presencia del Mycobacterium sp, por medio de la identificación molecular (PCR-PRA, en una población de 19 tortugas Morrocoy en cautiverio en el Zoológico mencionado anteriormente. Se procedió a tuberculinizar a todas las tortugas, las cuales resultaron negativas y se recolectaron muestras de materia fecal y muestras ambientales (agua y suelo y se cultivaron en medios OK/MSTA, LJ y OK respectivamente realizando baciloscopia para cada una de las muestras. De la muestras de materia fecal sólo cuatro fueron positivas a baciloscopia y de nueve muestras ambientales (suelo (n=7, agua (n=2, cinco fueron positivas (suelo (n=4, agua (n=1; en cuanto al crecimiento fueron negativas todas las de materia fecal de las tortugas Morrocoy. De las muestras ambientales (suelo, agua crecieron cinco y una muestras respectivamente. Adicionalmente se obtuvo muestras de la necropsia de una tortuga Icotea, (tejido, orina y absceso y sólo hubo crecimiento de la muestra de absceso. De la muestra de absceso se identificó Mycobacterium gordonae tipo 3, de las de suelo se obtuvo Mycobacterium avium tipo 3 y en el de agua se obtuvo Mycobacterium fortuitum tipo 1. Los hallazgos sugieren la necesidad de una vigilancia continua, que permita la identificación de la presencia de micobacterias; por medio de pruebas de laboratorio apropiadas (baciloscopia, cultivo, pruebas bioquímicas y moleculares; ya que se debe evitar que las tortugas sigan siendo parte de un ciclo epidemiológico de transmisión como portadores sanos y el contacto con los humanos debe darse sólo cuando sea estrictamente necesario, aplicando normas de bioseguridad.

  1. Determinación de frecuencia cardiaca, frecuencia respiratoria, lactato deshidrogenasa, creatinkinasa y ácido láctico en caballos durante competencia de salto en la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Paula Andrea Guerrero Nieto

    2009-06-01

    Full Text Available El estudio presenta los primeros resultados de investigación en variables fisiológicas y sus cambios por el ejercicio en equinos en competencia de salto en el país. Se utilizaron 24 ejemplares de las razas Silla Argentina, PSI y mestizo de la Escuela de Equitación del Ejército Nacional de Colombia, que participaron en pruebas de salto (1,10 – 1,20 m en diferentes centros ecuestres de la Sabana de Bogotá. Se determinó frecuencia cardiaca, frecuencia respiratoria y enzimas musculares (creatinquinasa (CK, lactato deshidrogenasa (LDH y el ácido láctico.. Se tomaron tres muestras: reposo, inmediatamente después del ejercicio y a las 6 horas posejercicio. Para la frecuencia cardiaca se utilizó un monitor POLAR S625; la frecuencia respiratoria se determinó mediante fonendoscopio; y las enzimas y el ácido láctico se analizaron en laboratorio. Se utilizó el método estadístico ANAVA para enzimas musculares y acido láctico y estadística descriptiva para frecuencia cardiaca y respiratoria. En los resultados se encontró un comportamiento estadísticamente significativo (p < 0.05 del ácido láctico y la enzima creatinkinasa, a diferencia del comportamiento de la enzima lactato deshidrogenasa, que fue no significativo. Las frecuencias cardiaca y respiratoria se elevaron de manera significativa posejercicio y regresaron a lo normal alrededor de las 6 seis horas. El ácido láctico se incrementó posejercicio y disminuyó a las 6 horas, contrario a lo reportado por otros autores. Se concluye que una vez analizadas estas variables, hay diferencias con los valores obtenidos por otros autores, que pueden deberse a la altitud, al tipo y tiempo de ejercicio realizado. Por tanto es indispensable continuar haciendo estudios en este campo.

  2. Análisis del crecimiento de lechuga (Lactuca sativa L. ‘Batavia’ cultivada en un suelo salino de la Sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Carranza Carlos

    2009-04-01

    Full Text Available

    La salinidad es una limitante en cultivos hortícolas a nivel mundial, que ocasiona alteraciones en el crecimiento, baja absorción y distribución de nutrientes a diferentes órganos de la planta y cambios en la calidad. El análisis de crecimiento en especies hortícolas como la lechuga establecido en un suelo salino no había sido estudiado con profundidad en la Sabana de Bogotá. El experimento se realizó en el Centro Agropecuario Marengo de la Universidad Nacional de Colombia, ubicado en el km 12 vía Bogotá-Mosquera. En tres parcelas de 300 m2 cada una, con 8,3 plantas/m2, regadas con aguas del distrito La Ramada, se realizaron muestreos cada 8 días, se midió el área foliar y el peso seco. Se estimaron los parámetros de crecimiento con el modelo logístico y con la ecuación ajustada mediante el software SAS. Empleando el enfoque funcional, se derivaron algunos índices de crecimiento: tasa relativa de crecimiento (TRC, índice de área foliar (IAF, tasa de asimilación neta (TAN, tasa de crecimiento del cultivo (TCC, área foliar específica (AFE y la relación de área foliar (RAF. La TRC máxima en los primeros 10 días después del trasplante (ddt fue de 0,1164 g g-1 día-1; IAF máximo a los 61 días: 6,78; la TAN a los 24 ddt alcanzó el máximo de 0,00046 g cm-2 día-1; la TCC presentó el máximo a los 35 ddt, con 0,0007 g cm-2 día-1; la AFE máxima fue de 497,55 cm2 g-1 al trasplante y la RAF alta al trasplante de 483,38 cm2 g-1. La salinidad presente en los suelos del Centro Agropecuario Marengo ocasionó una reducción en los parámetros de crecimiento en lechuga.

  3. Urinary levels of high mobility group box-1 are associated with disease activity in antineutrophil cytoplasmic autoantibody-associated vasculitis.

    Directory of Open Access Journals (Sweden)

    Tian-Tian Ma

    Full Text Available High mobility group box-1 (HMGB1, a kind of pro-inflammatory mediator, is associated with inflammatory conditions and tissue damage. Our previous study demonstrated that the circulating levels of HMGB1 correlated with disease activity of antineutrophil cytoplasmic antibody (ANCA-associated vasculitis (AAV. In the current study, we aimed to measure urinary levels of HMGB1 in AAV patients, correlated them to clinical activity index and analysed the immunohistochemical HMGB1 staining in kidney specimens.50 patients with AAV in active stage and 56 patients with AAV in remission were recruited. The urinary levels of HMGB1 were determined by enzyme-linked immunosorbent assay. Moreover, renal biopsy specimens from 27 patients with active AAV were randomly collected to evaluate the deposition of HMGB1.Urinary HMGB1 levels in AAV patients in active stage were significantly higher than those in AAV patients in remission and healthy controls (1.46 [0.56-3.43] versus 0.38 [0.10-1.35] mg/μmolCr, P=0.001; 1.46 [0.56-3.43] versus 0.48 [0.40-0.60] mg/μmolCr, P=0.000, respectively. Further analysis found that urinary levels of HMGB1 correlated with erythrocyte sedimentation rate (r=0.354, p=0.012, C-reactive protein (r=0.289, p=0.042, and Birmingham Vasculitis Activity Score (r=0.350, p=0.013. Renal tissue of active AAV patients showed HMGB1 was mainly expressed in the cytoplasm and the extracellular space. The percentage of HMGB1-negative nuclei in renal tissue of patients with active AAV was significantly higher than that in normal controls (60.6±20.2 % versus 2.7±0.6 %, p<0.01.Urinary levels of HMGB1 may be associated with the disease activity in AAV patients.

  4. Ferredoxin-thioredoxin reductase: a catalytically active dithiol group links photoreduced ferredoxin to thioredoxin functional in photosynthetic enzyme regulation

    Energy Technology Data Exchange (ETDEWEB)

    Droux, M.; Miginiac-Maslow, M.; Jacquot, J.P.; Gadal, P.; Crawford, N.A.; Kosower, N.S.; Buchanan, B.B.

    1987-07-01

    The mechanism by which the ferredoxin-thioredoxin system activates the target enzyme, NADP-malate dehydrogenase, was investigated by analyzing the sulfhydryl status of individual protein components with (/sup 14/C)iodoacetate and monobromobimane. The data indicate that ferredoxin-thioredoxin reductase (FTR)--an iron-sulfur enzyme present in oxygenic photosynthetic organisms--is the first member of a thiol chain that links light to enzyme regulation. FTR possesses a catalytically active dithiol group localized on the 13 kDa (similar) subunit, that occurs in all species investigated and accepts reducing equivalents from photoreduced ferredoxin and transfers them stoichiometrically to the disulfide form of thioredoxin m. The reduced thioredoxin m, in turn, reduces NADP-malate dehydrogenase, thereby converting it from an inactive (S-S) to an active (SH) form. The means by which FTR is able to combine electrons (from photoreduced ferredoxin) with protons (from the medium) to reduce its active disulfide group remains to be determined.

  5. Automated recording of home cage activity and temperature of individual rats housed in social groups: The Rodent Big Brother project.

    Science.gov (United States)

    Redfern, William S; Tse, Karen; Grant, Claire; Keerie, Amy; Simpson, David J; Pedersen, John C; Rimmer, Victoria; Leslie, Lauren; Klein, Stephanie K; Karp, Natasha A; Sillito, Rowland; Chartsias, Agis; Lukins, Tim; Heward, James; Vickers, Catherine; Chapman, Kathryn; Armstrong, J Douglas

    2017-01-01

    Measuring the activity and temperature of rats is commonly required in biomedical research. Conventional approaches necessitate single housing, which affects their behavior and wellbeing. We have used a subcutaneous radiofrequency identification (RFID) transponder to measure ambulatory activity and temperature of individual rats when group-housed in conventional, rack-mounted home cages. The transponder location and temperature is detected by a matrix of antennae in a baseplate under the cage. An infrared high-definition camera acquires side-view video of the cage and also enables automated detection of vertical activity. Validation studies showed that baseplate-derived ambulatory activity correlated well with manual tracking and with side-view whole-cage video pixel movement. This technology enables individual behavioral and temperature data to be acquired continuously from group-housed rats in their familiar, home cage environment. We demonstrate its ability to reliably detect naturally occurring behavioral effects, extending beyond the capabilities of routine observational tests and conventional monitoring equipment. It has numerous potential applications including safety pharmacology, toxicology, circadian biology, disease models and drug discovery.

  6. Synthesis and in-vitro antibacterial activity of N-piperazinyl quinolone derivatives with 5-chloro-2-thienyl group

    Directory of Open Access Journals (Sweden)

    2008-08-01

    Full Text Available Background and the purpose of the study: Fluoroquinolones are an important group of antimicrobial agents that are used widely in the treatment of various infectious diseases. The purpose of the present study was to synthesize new N-piperazinyl quinolone derivatives with 5-chloro-2-theinyl group having possible antimicrobial activity. Methods: Reaction of ciprofloxacin (1, norfloxacin (2 and enoxacin (3 with α-bromoketone 10 or α-bromooxime derivatives 11a-c in DMF, in the presence of NaHCO3 at room temperature, afforded corresponding ketones 4a-c or oxime derivatives 5-7(a-c, respectively. Results and major conclusion: The synthesized compounds were tested against a series of Gram-positive and Gram-negative bacteria. The results of MIC tests against both Gram-positive and Gram-negative bacteria revealed that ciprofloxacin derivatives (compounds 4a, 5a, 6a and 7a were more active than norfloxacin and enoxacin analogues. Compound 5a, containing N-[2-(5-chlorothiophen-2-yl-2-hydroxyiminoethyl] residue provided a high in vitro antibacterial activity against Gram-positive bacteria, with MIC of 0.06, 0.125, 0.5 and 0.125 μg/mL against S. aureus, S. epidermidis, E. feacalis and B. subtilis, respectively. Its activity was found to be 4 to 8 times better than reference drug (ciprofloxacin against all Gram-positive bacteria with the exception of E. feacalis.

  7. The Activity of [60]Fullerene Derivatives Bearing Amine and Carboxylic Solubilizing Groups against Escherichia coli: A Comparative Study

    Directory of Open Access Journals (Sweden)

    Dmitry G. Deryabin

    2014-01-01

    Full Text Available We report a comparative investigation of the antibacterial activity of two water-soluble fullerene derivatives bearing protonated amine (AF and deprotonated carboxylic (CF groups appended to the fullerene cage via organic linkers. The negatively charged fullerene derivative CF showed no tendency to bind to the bacterial cells and, consequently, no significant antibacterial activity. In contrast, the compound AF loaded with cationic groups showed strong and partially irreversible binding to the negatively charged Escherichia coli K12 TG1 cells and to human erythrocytes, also possessing negative zeta potential. Adsorption of AF on the bacterial surface was visualized by atomic force microscopy revealing the formation of specific clusters (AF aggregates surrounding the bacterial cell. Incubation of E. coli K12 TG1 with AF led to a dose-dependent bactericidal effect with LD50 = 79.1 µM. The presence of human erythrocytes in the test medium decreased the AF antibacterial activity. Thus we reveal that the water-soluble cationic fullerene derivative AF possesses promising antibacterial activity, which might be utilized in the development of novel types of chemical disinfectants.

  8. The neural basis of the bystander effect--the influence of group size on neural activity when witnessing an emergency.

    Science.gov (United States)

    Hortensius, Ruud; de Gelder, Beatrice

    2014-06-01

    Naturalistic observation and experimental studies in humans and other primates show that observing an individual in need automatically triggers helping behavior. The aim of the present study is to clarify the neurofunctional basis of social influences on individual helping behavior. We investigate whether when participants witness an emergency, while performing an unrelated color-naming task in an fMRI scanner, the number of bystanders present at the emergency influences neural activity in regions related to action preparation. The results show a decrease in activity with the increase in group size in the left pre- and postcentral gyri and left medial frontal gyrus. In contrast, regions related to visual perception and attention show an increase in activity. These results demonstrate the neural mechanisms of social influence on automatic action preparation that is at the core of helping behavior when witnessing an emergency. Copyright © 2014 Elsevier Inc. All rights reserved.

  9. Multi trace element analysis of dry biological materials by neutron activation analysis including a chemical group separation

    International Nuclear Information System (INIS)

    Weers, C.A.

    1980-01-01

    The principles of activation analysis and the practical aspects of neutron activation analysis are outlined. The limits which are set to accuracy and precision are defined. The description of the evaporation process is summarised in terms of the half-volume. This quantity is then used to define the resolving power. The formulation is checked by radiotracer experiments. Dried animal blood is used as the testing material. The pretreatment of the samples and (the development of) the destruction-evaporation apparatus is described. Four successive devices were built and tested. The development of the successive adsorption steps with active charcoal, Al 2 O 3 and coprecipitation with Fe(OH) 3 is presented. Seven groups of about 25 elements in total can be determined this way. The results obtained for standard reference materials are summarized and compared with literature data. (Auth.)

  10. Neck collar, "act-as-usual" or active mobilization for whiplash injury? A randomized parallel-group trial

    DEFF Research Database (Denmark)

    Kongsted, Alice; Montvilas, Erisela Qerama; Kasch, Helge

    2007-01-01

    practitioners within 10 days after a whiplash injury and randomized to: 1) immobilization of the cervical spine in a rigid collar followed by active mobilization, 2) advice to "act-as-usual," or 3) an active mobilization program (Mechanical Diagnosis and Therapy). Follow-up was carried out after 3, 6, and 12......-extension trauma to the cervical spine. It is unclear whether this, in some cases disabling, condition can be prevented by early intervention. Active interventions have been recommended but have not been compared with information only. Methods. Participants were recruited from emergency units and general......Study Design. Randomized, parallel-group trial. Objective. To compare the effect of 3 early intervention strategies following whiplash injury. Summary of Background Data. Long-lasting pain and disability, known as chronic whiplash-associated disorder (WAD), may develop after a forced flexion...

  11. Neck collar, "act-as-usual" or active mobilization for whiplash injury? A randomized parallel-group trial

    DEFF Research Database (Denmark)

    Kongsted, Alice; Montvilas, Erisela Qerama; Kasch, Helge

    2007-01-01

    Study Design. Randomized, parallel-group trial. Objective. To compare the effect of 3 early intervention strategies following whiplash injury. Summary of Background Data. Long-lasting pain and disability, known as chronic whiplash-associated disorder (WAD), may develop after a forced flexion......-extension trauma to the cervical spine. It is unclear whether this, in some cases disabling, condition can be prevented by early intervention. Active interventions have been recommended but have not been compared with information only. Methods. Participants were recruited from emergency units and general...... practitioners within 10 days after a whiplash injury and randomized to: 1) immobilization of the cervical spine in a rigid collar followed by active mobilization, 2) advice to "act-as-usual," or 3) an active mobilization program (Mechanical Diagnosis and Therapy). Follow-up was carried out after 3, 6, and 12...

  12. Gas-phase formaldehyde adsorption isotherm studies on activated carbon: correlations of adsorption capacity to surface functional group density.

    Science.gov (United States)

    Carter, Ellison M; Katz, Lynn E; Speitel, Gerald E; Ramirez, David

    2011-08-01

    Formaldehyde (HCHO) adsorption isotherms were developed for the first time on three activated carbons representing one activated carbon fiber (ACF) cloth, one all-purpose granular activated carbon (GAC), and one GAC commercially promoted for gas-phase HCHO removal. The three activated carbons were evaluated for HCHO removal in the low-ppm(v) range and for water vapor adsorption from relative pressures of 0.1-0.9 at 26 °C where, according to the IUPAC isotherm classification system, the adsorption isotherms observed exhibited Type V behavior. A Type V adsorption isotherm model recently proposed by Qi and LeVan (Q-L) was selected to model the observed adsorption behavior because it reduces to a finite, nonzero limit at low partial pressures and it describes the entire range of adsorption considered in this study. The Q-L model was applied to a polar organic adsorbate to fit HCHO adsorption isotherms for the three activated carbons. The physical and chemical characteristics of the activated carbon surfaces were characterized using nitrogen adsorption isotherms, X-ray photoelectron spectroscopy (XPS), and Boehm titrations. At low concentrations, HCHO adsorption capacity was most strongly related to the density of basic surface functional groups (SFGs), while water vapor adsorption was most strongly influenced by the density of acidic SFGs.

  13. Ionosphere monitoring and forecast activities within the IAG working group "Ionosphere Prediction"

    Science.gov (United States)

    Hoque, Mainul; Garcia-Rigo, Alberto; Erdogan, Eren; Cueto Santamaría, Marta; Jakowski, Norbert; Berdermann, Jens; Hernandez-Pajares, Manuel; Schmidt, Michael; Wilken, Volker

    2017-04-01

    Ionospheric disturbances can affect technologies in space and on Earth disrupting satellite and airline operations, communications networks, navigation systems. As the world becomes ever more dependent on these technologies, ionospheric disturbances as part of space weather pose an increasing risk to the economic vitality and national security. Therefore, having the knowledge of ionospheric state in advance during space weather events is becoming more and more important. To promote scientific cooperation we recently formed a Working Group (WG) called "Ionosphere Predictions" within the International Association of Geodesy (IAG) under Sub-Commission 4.3 "Atmosphere Remote Sensing" of the Commission 4 "Positioning and Applications". The general objective of the WG is to promote the development of ionosphere prediction algorithm/models based on the dependence of ionospheric characteristics on solar and magnetic conditions combining data from different sensors to improve the spatial and temporal resolution and sensitivity taking advantage of different sounding geometries and latency. Our presented work enables the possibility to compare total electron content (TEC) prediction approaches/results from different centers contributing to this WG such as German Aerospace Center (DLR), Universitat Politècnica de Catalunya (UPC), Technische Universität München (TUM) and GMV. DLR developed a model-assisted TEC forecast algorithm taking benefit from actual trends of the TEC behavior at each grid point. Since during perturbations, characterized by large TEC fluctuations or ionization fronts, this approach may fail, the trend information is merged with the current background model which provides a stable climatological TEC behavior. The presented solution is a first step to regularly provide forecasted TEC services via SWACI/IMPC by DLR. UPC forecast model is based on applying linear regression to a temporal window of TEC maps in the Discrete Cosine Transform (DCT) domain

  14. Critical group doses arising from routine aquatic discharges of activity from the Heysham 2 nuclear power station

    International Nuclear Information System (INIS)

    Maul, P.R.

    1986-07-01

    An assessment of critical group doses arising from routine discharges of activity to sea from the Heysham 2 nuclear power station has been undertaken using the CODAR2 computer program. The largest critical group dose rate was calculated to be 50 μSv/y, about 80 per cent of which arose from the external exposure of individuals occupying intertidal sediments of the Lune Estuary from the single nuclide 60 Co. CODAR2 employs a single well mixed local compartment for critical group calculations and can not include the effects of processes varying over the compartment. A more detailed study of the critical group exposure has been carried out using recently developed methods to assess the uncertainties and pessimisms involved in the CODAR2 calculations. It is concluded that these calculations are pessimistic by about a factor of 2, with a reference calculation using the more detailed methods giving a dose rate of 23 μSv/y for the Lune Estuary group. Further reductions in the dose estimate might be possible if site specific measurements of the concentration factor for Co on estuarine sediments and the sedimentation rate in the Lune Estuary could be made. (author)

  15. Adsorption of lead(II) and copper(II) on activated carbon by complexation with surface functional groups

    International Nuclear Information System (INIS)

    Pesavento, Maria; Profumo, Antonella; Alberti, Giancarla; Conti, Fabio

    2003-01-01

    The adsorption of lead(II) and copper(II) on an activated carbon (Filtrasorb 300, Chemviron) was characterized assuming that it takes place by formation of complexes with functional groups, present in the activated carbon. Their concentration and conditional adsorption coefficients were determined for each metal by titration of the carbon in suspension in aqueous phase, at constant acidity, with the metal itself. For each titration point, the concentration of the metal in the solution phase after equilibration was determined, and the data were processed by the Ruzic linearization method, to obtain the concentration of the active sites involved in the sorption, and the conditional constant. The effect of the pH was also examined, in the range 4-6, obtaining that the adsorption increases at increasing pH. The protonation and adsorption constants were determined from the conditional adsorption coefficients obtained at the different acidities. The concentration of the active sites is 0.023 and 0.042 mmol g -1 , and the protonation constants are 1.0x10 6 and 4.6x10 4 M -1 for Pb(II) and Cu(II). The corresponding adsorption constants are respectively 1.4x10 5 and 6.3x10 3 M -1 . All the parameters are affected by a large uncertainty, probably due to the heterogeneity of the active groups in the activated carbon. Even if so, these parameters make it possible a good prediction of the adsorption in a wide range of conditions. Other sorption mechanism can be set up at different conditions, in particular at different pH, as it has been demonstrated in the case of copper(II)

  16. Adsorption of lead(II) and copper(II) on activated carbon by complexation with surface functional groups

    Energy Technology Data Exchange (ETDEWEB)

    Pesavento, Maria; Profumo, Antonella; Alberti, Giancarla; Conti, Fabio

    2003-03-17

    The adsorption of lead(II) and copper(II) on an activated carbon (Filtrasorb 300, Chemviron) was characterized assuming that it takes place by formation of complexes with functional groups, present in the activated carbon. Their concentration and conditional adsorption coefficients were determined for each metal by titration of the carbon in suspension in aqueous phase, at constant acidity, with the metal itself. For each titration point, the concentration of the metal in the solution phase after equilibration was determined, and the data were processed by the Ruzic linearization method, to obtain the concentration of the active sites involved in the sorption, and the conditional constant. The effect of the pH was also examined, in the range 4-6, obtaining that the adsorption increases at increasing pH. The protonation and adsorption constants were determined from the conditional adsorption coefficients obtained at the different acidities. The concentration of the active sites is 0.023 and 0.042 mmol g{sup -1}, and the protonation constants are 1.0x10{sup 6} and 4.6x10{sup 4} M{sup -1} for Pb(II) and Cu(II). The corresponding adsorption constants are respectively 1.4x10{sup 5} and 6.3x10{sup 3} M{sup -1}. All the parameters are affected by a large uncertainty, probably due to the heterogeneity of the active groups in the activated carbon. Even if so, these parameters make it possible a good prediction of the adsorption in a wide range of conditions. Other sorption mechanism can be set up at different conditions, in particular at different pH, as it has been demonstrated in the case of copper(II)

  17. Determinants of physical activity and sedentary behaviour in university students: a qualitative study using focus group discussions.

    Science.gov (United States)

    Deliens, Tom; Deforche, Benedicte; De Bourdeaudhuij, Ilse; Clarys, Peter

    2015-02-28

    College or university is a critical period regarding unhealthy changes in energy related behaviours in students. The first objective of this explorative study was to identify determinants of physical activity and sedentary behaviour in Belgian university students. Secondly, we aimed to collect ideas and recommendations to increase physical activity and decrease sedentary behaviours in university students. Using a semi-structured question guide, seven focus group discussions were conducted consisting of 17 male and 29 female university students from a variety of study disciplines, with a mean age of 20.7 ± 1.6 yrs. Using Nvivo9, an inductive thematic approach was used for data analysis. Students reported that both physical and sedentary activities were influenced by individual factors (e.g. perceived enjoyment, self-discipline, time and convenience), their social networks (e.g. (lack of) parental control, modelling, social support), physical environment (e.g. availability and accessibility, travel time/distance, prices), and macro environment (e.g. media and advertising). Furthermore, the relationships between determinants and university students' physical activity and sedentary behaviour seemed to be moderated by university characteristics, such as residency, university lifestyle, exams and academic pressure. Recommendations for future physical activity interventions include improving information strategies regarding on-campus sports activities, cheaper and/or more flexible sports subscriptions and formulas, including 'sports time' into the curricula, and providing university bicycles around campus. Students also believed that increasing students' physical activity might decrease their sedentary behaviour at the same time. The recommendations and ideas discussed in this study may facilitate the development of effective and tailored (multilevel) intervention programs aiming to increase physical activity and decrease sedentary behaviours in university students.

  18. Slow and stopped light in active gain composite materials of metal nanoparticles. Ultralarge group index-bandwidth product predicted

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Kwang-Hyon; Choe, Song-Hyok [Institute of Lasers, State Academy of Sciences, Unjong District, Pyongyang (Korea, Democratic People' s Republic of)

    2017-08-15

    Chip-compatible slow light devices with large group index-bandwidth products and low losses are of great interest in the community of modern photonics. In this work, active gain materials containing metal nanoparticles are proposed as the slow and stopped light materials. Gain-assisted high field enhancement in metal nanoparticles and the resultant strong dispersion lead to such phenomena. From the Maxwell-Garnett model, it is revealed that the metal nanocomposite exhibits the infinitely large group index when the gain of the host medium and the filling factor of metal nanoparticles satisfy a critical condition. For the gain of the host above the critical value, one can observe slowing down effect with amplification of light pulses. Significantly large group index-bandwidth products, which vary from a few to several thousand or even infinity depending on the gain value of the host medium, have been numerically predicted in active silica glasses containing spheroidal metal nanoparticles, as examples. The proposed scheme inherently provides the widely varying operating spectral range by changing the aspect ratio of metal nanoparticles and chip-compatibility with low cost. (copyright 2017 by WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  19. Enhancement of the photocatalytic activity of TiO2 nanoparticles by surface-capping DBS groups

    International Nuclear Information System (INIS)

    Wang Baiqi; Jing Liqiang; Qu Yichun; Li Shudan; Jiang Baojiang; Yang Libin; Xin Baifu; Fu Honggang

    2006-01-01

    TiO 2 nanoparticles capped with sodium dodecylbenzenesulfonate (DBS) are synthesized by a sol-hydrothermal process using tetrabutyl titanate and DBS as raw materials. The effects of surface-capping DBS on the surface photovoltage spectroscopy (SPS), photoluminescence (PL) and photocatalytic performance of TiO 2 nanoparticles are principally investigated together with their relationships. The results show that the surface of TiO 2 nanoparticles can be well capped by DBS groups while the pH value and added DBS amount are controlled at 5.0 and 2% of TiO 2 mass weight, respectively, and the linkage between DBS groups and TiO 2 surfaces is mainly by means of quasi-sulphonate bond. The intensities of SPS and PL spectra of TiO 2 obviously decrease after DBS-capping, while the activity can greatly increase during the photocatalytic degradation of Rhodamine B (RhB) solution, which are mainly attributed to the electron-withdrawing character of the DBS groups. Moreover, the enhancement of photocatalytic activity of DBS-capped TiO 2 is also related to the increase in the capability for adsorbing RhB

  20. Does estradiol have an impact on the dipeptidyl peptidase IV enzyme activity of the Prevotella intermedia group bacteria?

    Science.gov (United States)

    Fteita, Dareen; Könönen, Eija; Gürsoy, Mervi; Söderling, Eva; Gürsoy, Ulvi Kahraman

    2015-12-01

    Initiation and development of pregnancy-associated gingivitis is seemingly related to the microbial shift towards specific gram-negative anaerobes in subgingival biofilms. It is known that Prevotella intermedia sensu lato is able to use estradiol as an alternative source of growth instead of vitamin K. The aim of the present study was to investigate the impact of estradiol on the bacterial dipeptidyl peptidase IV (DPPIV) enzyme activity in vitro as a virulent factor of the Prevotella intermedia group bacteria, namely P. intermedia, Prevotella nigrescens, Prevotella pallens, and Prevotella aurantiaca. In all experiments, 2 strains of each Prevotella species were used. Bacteria were incubated with the concentrations of 0, 30, 90, and 120 nmol/L of estradiol and were allowed to build biofilms at an air-solid interface. DPPIV activities of biofilms were measured kinetically during 20 min using a fluorometric assay. The enzyme activity was later related to the amount of protein produced by the same biofilm, reflecting the biofilm mass. Estradiol significantly increased DPPIV activities of the 8 Prevotella strains in a strain- and dose-dependent manner. In conclusion, our in vitro experiments indicate that estradiol regulates the DPPIV enzyme activity of P. intermedia, P. nigrescens, P. pallens, and P. aurantiaca strains differently. Our results may, at least partly, explain the role of estradiol to elicit a virulent state which contributes to the pathogenesis of pregnancy-related gingivitis. Copyright © 2015 Elsevier Ltd. All rights reserved.

  1. Investigating temporary acyclicity in a captive group of Asian elephants (Elephas maximus): Relationship between management, adrenal activity and social factors.

    Science.gov (United States)

    Edwards, Katie L; Trotter, Jessica; Jones, Martin; Brown, Janine L; Steinmetz, Hanspeter W; Walker, Susan L

    2016-01-01

    Routine faecal steroid monitoring has been used to aid the management of five captive Asian elephant (Elephas maximus) females at Chester Zoo, UK, since 2007. Progestagen analysis initially revealed synchronised oestrous cycles among all females. However, a 14- to 20-week period of temporary acyclicity subsequently occurred in three females, following several management changes (increased training, foot-care and intermittent matriarch removal for health reasons) and the initiation of pregnancy in another female. The aim of this study was to retrospectively investigate whether these management changes were related to increased adrenal activity and disruption of ovarian activity, or whether social factors may have been involved in the temporary cessation of cyclicity. Faecal samples collected every other day were analysed to investigate whether glucocorticoid metabolites were related to reproductive status (pregnant, cycling, acyclic) or management (training, foot-care, matriarch presence). Routine training and foot-care were not associated with adrenal activity; however, intensive foot-care to treat an abscess in one female was associated with increased glucocorticoid concentration. Matriarch presence influenced adrenal activity in three females, being lower when the matriarch was separated from the group at night compared to being always present. However, in the females that exhibited temporary acyclicity, there was no consistent relationship between glucocorticoids and cyclicity state. Although the results of this study do not fully explain this occurrence, the highly synchronised nature of oestrous cycles within this group, and the concurrent acyclicity in three females, raises the question of whether social factors could have been involved in the temporary disruption of ovarian activity. Copyright © 2015 Elsevier Inc. All rights reserved.

  2. Biotransformation of Bicyclic Halolactones with a Methyl Group in the Cyclohexane Ring into Hydroxylactones and Their Biological Activity

    Directory of Open Access Journals (Sweden)

    Katarzyna Wińska

    2016-10-01

    Full Text Available The aim of this study was the chemical synthesis of a series of halo- and unsaturated lactones, as well as their microbial transformation products. Finally some of their biological activities were assessed. Three bicyclic halolactones with a methyl group in the cyclohexane ring were obtained from the corresponding γ,δ-unsaturated ester during a two-step synthesis. These lactones were subjected to screening biotransformation using twenty two fungal strains. These strains were tested on their ability to transform halolactones into new hydroxylactones. Among the six strains able to catalyze hydrolytic dehalogenation, only two (Fusarium equiseti, AM22 and Yarrowia lipolytica, AM71 gave a product in a high yield. Moreover, one strain (Penicillium wermiculatum, AM30 introduced the hydroxy group on the cyclohexane ring without removing the halogen atom. The biological activity of five of the obtained lactones was tested. Some of these compounds exhibited growth inhibition against bacteria, yeasts and fungi and deterrent activity against peach-potato aphid.

  3. A Group Motor Skills Program for Children with Coordination Difficulties: Effect on Fundamental Movement Skills and Physical Activity Participation.

    Science.gov (United States)

    Kane, Kyra J; Staples, Kerri L

    2016-01-01

    Children with coordination difficulties are at risk of low levels of physical activity (PA) participation. This intervention examined the effects of a multidisciplinary program that emphasized parent participation on motor skill performance and PA. Ten boys (5-7 years) completed a group program consisting of conditioning exercises and activities designed to address child-selected goals. Motor proficiency and PA participation were assessed before and after the program using the Test of Gross Motor Development (TGMD-2) and triaxial accelerometers, respectively. Rating scales captured child and parent perceptions of performance for each child's goals. TGMD-2 subtest raw scores, age equivalent and percentile scores improved, along with parent ratings of their child's performance. Six children reported skill improvements. On average, moderate to vigorous PA improved by 10 min per day although these gains were not significant. Time spent in sedentary activities was unchanged. None of the children met the Canadian PA and sedentary behaviour guidelines. The results support effectiveness of a group program to improve gross motor performance and levels of PA in children with coordination difficulties. Gains in both of these domains also have the potential to impact quality of life and reduce health risks associated with inactivity.

  4. Tag team simulation: An innovative approach for promoting active engagement of participants and observers during group simulations.

    Science.gov (United States)

    Levett-Jones, Tracy; Andersen, Patrea; Reid-Searl, Kerry; Guinea, Stephen; McAllister, Margaret; Lapkin, Samuel; Palmer, Lorinda; Niddrie, Marian

    2015-09-01

    Active participation in immersive simulation experiences can result in technical and non-technical skill enhancement. However, when simulations are conducted in large groups, maintaining the interest of observers so that they do not disengage from the learning experience can be challenging. We implemented Tag Team Simulation with the aim of ensuring that both participants and observers had active and integral roles in the simulation. In this paper we outline the features of this innovative approach and provide an example of its application to a pain simulation. Evaluation was conducted using the Satisfaction with Simulation Experience Scale. A total of 444 year nursing students participated from a population of 536 (response rate 83%). Cronbach's alpha for the Scale was .94 indicating high internal consistency. The mean satisfaction score for participants was 4.63 compared to 4.56 for observers. An independent sample t test revealed no significant difference between these scores (t (300) = -1.414, p = 0.16). Tag team simulation is an effective approach for ensuring observers' and participants' active involvement during group-based simulations and one that is highly regarded by students. It has the potential for broad applicability across a range of leaning domains both within and beyond nursing. Copyright © 2015 Elsevier Ltd. All rights reserved.

  5. Influence of landscape structure on the functional groups of an aphidophagous guild: Active-searching predators, furtive predators and parasitoids

    Directory of Open Access Journals (Sweden)

    Julie-Éléonore Maisonhaute

    2011-12-01

    Full Text Available A lot of studies focusing on the effect of agricultural landscapes demonstrate that many arthropod species are influenced by landscape structure. In particular, non–crop areas and landscape diversity are often associated with a higher abundance and diversity of natural enemies in fields. Numerous studies focused on the influence of landscape structure on ground beetles, spiders and ladybeetles but few on other natural enemies or different functional groups. Thus, the objective of the present study was to determine the influence of landscape structure on the functional groups, i.e., active-searching predators, furtive predators and parasitoids of aphidophagous guilds. Natural enemies were sampled on milkweed infested with aphids, growing along the borders of ditches adjacent to cornfields. The sampling occurred weekly from June to September in 2006 and 2007, in the region of Lanaudičre (Quebec, Canada. The landscapes within a radius 200 and 500 m around each site were analyzed. The abundance, richness and species composition (based on functional groups of natural enemies were related to landscape structure. The results indicated that landscape structure explained up to 21.6% of the variation in natural enemy assemblage and confirm the positive effects of non-crop areas and landscape diversity. A lower influence of landscape structure on species composition was observed (6.4 to 8.8% and varied greatly among the functional groups. Coccinellidae and furtive predators were the group most influenced by landscape structure. In conclusion, the influence of landscape varied greatly among the different species of the same functional group.

  6. Cross national study of leisure-time physical activity in Dutch and English populations with ethnic group comparisons.

    Science.gov (United States)

    de Munter, Jeroen S L; Agyemang, Charles; van Valkengoed, Irene G M; Bhopal, Raj; Zaninotto, Paola; Nazroo, James; Kunst, Anton E; Stronks, Karien

    2013-06-01

    Variations between countries in leisure-time physical activity (LTPA) can be used to test the convergence thesis, which expects that ethnic minority groups change towards the LTPA levels of the native population of host countries. The aim of this study was to test whether similar differences in LTPA between the native populations of England and the Netherlands are also observed among the Indian and African descent groups living in these countries. We used English and Dutch population-based health surveys that included participants aged 35-60 years of European (n(english) = 14,723, n(dutch) = 567), Indian (n(english) = 1264, n(dutch) = 370) and African-Caribbean (n(english) = 1112, n(dutch) = 689) descent. Levels of LTPA (30-minute walking, any reported cycling, gardening, dancing and playing sports) were estimated with age-sex-standardized prevalence rates. Comparisons among groups were made using adjusted Prevalence Ratios (PRs). Within both countries and compared with the European group, Indian and African groups had lower levels of gardening and cycling, whereas the African groups had higher levels of dancing. Between countries, among the European groups, the Netherlands showed higher prevalence of cycling than England, PR = 2.26 (95% CI: 2.06-2.48), and this was 2.85 (1.94-4.19) among Indian descent, and 2.77 (2.05-3.73) among African descent. For playing sports, this was PR = 1.30 (1.23-1.38), 1.43 (1.24-1.66) and 1.22 (1.10-1.34), whereas for gardening this was PR = 0.71 (0.65-0.78), 0.65 (0.52-0.81) and 0.75 (0.62-0.90), respectively. Walking and dancing showed inconsistent differences between the countries and ethnic groups. This cross-national comparison supports the expectation that LTPA of Indian and African descent groups converge towards the national levels of England and the Netherlands respectively.

  7. No Pet or Their Person Left Behind: Increasing the Disaster Resilience of Vulnerable Groups through Animal Attachment, Activities and Networks.

    Science.gov (United States)

    Thompson, Kirrilly; Every, Danielle; Rainbird, Sophia; Cornell, Victoria; Smith, Bradley; Trigg, Joshua

    2014-05-07

    Increased vulnerability to natural disasters has been associated with particular groups in the community. This includes those who are considered de facto vulnerable (children, older people, those with disabilities etc.) and those who own pets (not to mention pets themselves). The potential for reconfiguring pet ownership from a risk factor to a protective factor for natural disaster survival has been recently proposed. But how might this resilience-building proposition apply to vulnerable members of the community who own pets or other animals? This article addresses this important question by synthesizing information about what makes particular groups vulnerable, the challenges to increasing their resilience and how animals figure in their lives. Despite different vulnerabilities, animals were found to be important to the disaster resilience of seven vulnerable groups in Australia. Animal attachment and animal-related activities and networks are identified as underexplored devices for disseminating or 'piggybacking' disaster-related information and engaging vulnerable people in resilience building behaviors (in addition to including animals in disaster planning initiatives in general). Animals may provide the kind of innovative approach required to overcome the challenges in accessing and engaging vulnerable groups. As the survival of humans and animals are so often intertwined, the benefits of increasing the resilience of vulnerable communities through animal attachment is twofold: human and animal lives can be saved together.

  8. No Pet or Their Person Left Behind: Increasing the Disaster Resilience of Vulnerable Groups through Animal Attachment, Activities and Networks

    Directory of Open Access Journals (Sweden)

    Kirrilly Thompson

    2014-05-01

    Full Text Available Increased vulnerability to natural disasters has been associated with particular groups in the community. This includes those who are considered de facto vulnerable (children, older people, those with disabilities etc. and those who own pets (not to mention pets themselves. The potential for reconfiguring pet ownership from a risk factor to a protective factor for natural disaster survival has been recently proposed. But how might this resilience-building proposition apply to vulnerable members of the community who own pets or other animals? This article addresses this important question by synthesizing information about what makes particular groups vulnerable, the challenges to increasing their resilience and how animals figure in their lives. Despite different vulnerabilities, animals were found to be important to the disaster resilience of seven vulnerable groups in Australia. Animal attachment and animal-related activities and networks are identified as underexplored devices for disseminating or ‘piggybacking’ disaster-related information and engaging vulnerable people in resilience building behaviors (in addition to including animals in disaster planning initiatives in general. Animals may provide the kind of innovative approach required to overcome the challenges in accessing and engaging vulnerable groups. As the survival of humans and animals are so often intertwined, the benefits of increasing the resilience of vulnerable communities through animal attachment is twofold: human and animal lives can be saved together.

  9. The effects of adolescence sports and exercise on adulthood leisure-time physical activity in educational groups

    Directory of Open Access Journals (Sweden)

    Rahkonen Ossi

    2010-04-01

    Full Text Available Abstract Background Physical inactivity has become a major public health problem and clear educational differences in physical activity have been reported across Europe and USA. The origins of adulthood physical activity are suggested to be in childhood and adolescence physical activity. Hardly any studies have, however, examined if the educational differences in physical activity might also be due to educational differences in early experiences in physical activity. Thus, our aim was to examine how competitive sports in youth, and exercise in late adolescence, and opinions on physical education (PE in childhood determined adulthood leisure-time physical activity (LTPA in different educational groups. Methods We used cross-sectional population-based National FINRISK 2002 data for 1918 men and 2490 women aged 25 to 64 years. Competitive sports in youth, exercise in late adolescence, and opinions on PE in childhood were assessed retrospectively via self-reports. Adulthood LTPA was collected with 12-month recall. In 2008, we calculated structural equation models including latent variables among the low- ( Results Men more often than women reported that their experience of PE was interesting and pleasant as well as having learned useful skills during PE classes. Men, compared to women, had also been more active in the three selected competitive sports in youth and exercised in late adolescence. Participation in competitive sports in youth among the low-educated and exercise in late adolescence among the high-educated had a direct effect on adulthood LTPA. Among the low-educated, opinions on PE in childhood had an indirect effect on adulthood LTPA through participation in competitive sports in youth whereas among the high-educated, the indirect effect went through exercise in late adolescence. The effects were mainly similar between genders. Conclusions Our study answers to a strong need to assess the determinants of leisure-time physical activity to

  10. The fire assay preconcentration of the platinum group elements for the neutron activation analysis of geological material

    International Nuclear Information System (INIS)

    Parry, S.J.

    1994-01-01

    This paper describes the work that has been carried out using neutron activation analysis (NAA) to develop a rapid and reliable method for the determination of the platinum group elements (PGE: Pt, Pd, Ir, Ru, Rh, and Os) and Au in geological, environmental and industrial samples. The method is based on the now established method of preconcentration with fire assay, followed by NAA of the separated PGE and Au. Recent developments have seen improvements in the technique to eliminate losses due to dissolution procedures, and complete recovery of the elements prior to analysis. The method is now being used to validate inductively coupled plasma-mass spectroscopy methods for analysis of the PGE

  11. Interaction of paracetamol and 125I-paracetamol with surface groups of activated carbon. Theoretical and experimental study

    International Nuclear Information System (INIS)

    Daniel Hernandez-Valdes; Ulises Jauregui-Haza; Carlos Enriquez-Victorero; Melvin Arias

    2015-01-01

    The selection of activated carbon (AC) filters for water decontamination is currently carried out empirically. The low concentrations of drugs in the environment make the radioisotope labeling a valuable tool for physical and chemical studies of the adsorption process. A theoretical study of paracetamol and 125 I-paracetamol adsorption onto AC was performed to evaluate the interactions between pollutants and surface groups (SG) of AC. Paracetamol was labeled with 125 I and adsorption isotherms were obtained using radioanalytical and spectrophotometric techniques. The radioanalytical method overestimates the paracetamol adsorption. The validity of the chosen approach for qualitative assessment of SG influence over the adsorption process was demonstrated. (author)

  12. Applied nuclear data research and development. Progress report, January 1--March 31, 1976. [Activities of LASL Nuclear Data Group

    Energy Technology Data Exchange (ETDEWEB)

    Baxman, C.I.; Hale, G.M.; Young, P.G. (comps.)

    1976-08-01

    This report describes the activities of the Los Alamos Nuclear Data Group for the period January 1 to March 31, 1976. The following areas are discussed: Theory and evaluation of nuclear cross sections, including calculations of neutron cross sections; Nuclear cross-section processing, including developments concerning the computer codes used; Cross sections for HTGR safety research; Effect of dispersion matrix structure on a data adjustment and consistency analysis; Fission product and decay data studies; and Medium-energy library. 20 figures, 18 tables. (RWR)

  13. Recent and current activities of the OECD/NEA Working Group on Fuel Safety (NEA/CSNI). Recent and Current Activities of the Working Group on Fuel Safety (NEA/CSNI)

    International Nuclear Information System (INIS)

    Petit, Marc

    2013-01-01

    The Working Group on Fuel Safety (WGFS) is part of the Committee on the Safety of Nuclear Installations (CSNI) of the Nuclear Energy Agency and has the main mission of advancing the current understanding and addressing fuel safety issues. Recent and current activities of the working group have addressed mainly the loss of coolant accident (LOCA), the reactivity initiated accident (RIA), the fuel safety criteria and leaking fuel issues, as well as Fukushima-related fuel topics. In the area of LOCA, the group issued different documents, the most notable being a very comprehensive state of the art report [NEA/CSNI/R (2009)15]. Regarding RIA, some documents were finalised and issued in the recent years, as well as a state of the art report [NEA/CSNI/R (2010)1]. The question of leaking fuel and how it is handled in the reactors is an activity that is just starting. Of particular interest to people developing new fuel concepts is the Nuclear Fuel Safety Criteria Technical Review - Second Edition [NEA/CSNI/R (2012)3]. This document provides a broad overview of the numerous criteria used in the NEA member countries to demonstrate to safe use of fuel in light water reactors. The WGFS has started discussions about fuel related issues raised by the Fukushima accident, in particular, hydrogen production. New concepts have been proposed to solve these issues but it appears that these concepts will need to go through a long qualification process to assess their adequacy for the different situations considered in the evaluation of fuel safety, from normal operation to accident conditions

  14. Perceptions and the role of group exercise among New York City adults, 2010-2011: an examination of interpersonal factors and leisure-time physical activity.

    Science.gov (United States)

    Firestone, Melanie J; Yi, Stella S; Bartley, Katherine F; Eisenhower, Donna L

    2015-03-01

    To examine associations of descriptive norms (i.e., behaviors of social group members) and exercising 'with a partner' or 'as a part of a group' on weekly leisure-time physical activity. T-tests and adjusted multivariable linear models were used to test the associations between descriptive norms and exercising with a partner or as a part of a group with self-reported leisure-time physical activity using the cross-sectional, population-based New York City Physical Activity and Transit (PAT) Survey 2010-2011 (n=3806). Overall, 70.6% of adult New Yorkers reported having physically active friends. Having active friends was associated with increased leisure-time physical activity; however, the effect varied by sex. Compared to those who did not have active friends, males with active friends reported two times more activity (56 min/week) and women reported two and a half times more activity (35 min/week) (both p-valuesPhysically active males and females who usually engaged in leisure-time activities as a part of a group reported 1.4 times more activity than those who exercised alone (both p-valuesexercise were associated with leisure-time physical activity among adults. Based on these associations, encouraging group exercise may be an effective strategy for increasing leisure-time physical activity among certain subgroups. Copyright © 2015 Elsevier Inc. All rights reserved.

  15. Effects of nitrogen- and oxygen-containing functional groups of activated carbon nanotubes on the electrochemical performance in supercapacitors

    Science.gov (United States)

    Liu, Haiyan; Song, Huaihe; Chen, Xiaohong; Zhang, Su; Zhou, Jisheng; Ma, Zhaokun

    2015-07-01

    A kind of nitrogen- and oxygen-containing activated carbon nanotubes (ACNTs) has been prepared by carbonization and activation of polyaniline nanotubes obtained by rapidly mixed reaction. The ACNTs show oxygen content of 15.7% and nitrogen content of 2.97% (atomic ratio). The ACNTs perform high capacitance and good rate capability (327 F g-1 at the current density of 10 A g-1) when used as the electrode materials for supercapacitors. Hydrogen reduction has been further used to investigate the effects of surface functional groups on the electrochemical performance. The changes for both structural component and electrochemical performance reveal that the quinone oxygen, pyridinic nitrogen, and pyrrolic nitrogen of carbon have the most obvious influence on the capacitive property because of their pseudocapacitive contributions.

  16. Increasing physical activity among young children from disadvantaged communities: study protocol of a group randomised controlled effectiveness trial.

    Science.gov (United States)

    Stanley, Rebecca M; Jones, Rachel A; Cliff, Dylan P; Trost, Stewart G; Berthelsen, Donna; Salmon, Jo; Batterham, Marijka; Eckermann, Simon; Reilly, John J; Brown, Ngiare; Mickle, Karen J; Howard, Steven J; Hinkley, Trina; Janssen, Xanne; Chandler, Paul; Cross, Penny; Gowers, Fay; Okely, Anthony D

    2016-10-19

    Participation in regular physical activity (PA) during the early years helps children achieve healthy body weight and can substantially improve motor development, bone health, psychosocial health and cognitive development. Despite common assumptions that young children are naturally active, evidence shows that they are insufficiently active for health and developmental benefits. Exploring strategies to increase physical activity in young children is a public health and research priority. Jump Start is a multi-component, multi-setting PA and gross motor skill intervention for young children aged 3-5 years in disadvantaged areas of New South Wales, Australia. The intervention will be evaluated using a two-arm, parallel group, randomised cluster trial. The Jump Start protocol was based on Social Cognitive Theory and includes five components: a structured gross motor skill lesson (Jump In); unstructured outdoor PA and gross motor skill time (Jump Out); energy breaks (Jump Up); activities connecting movement to learning experiences (Jump Through); and a home-based family component to promote PA and gross motor skill (Jump Home). Early childhood education and care centres will be demographically matched and randomised to Jump Start (intervention) or usual practice (comparison) group. The intervention group receive Jump Start professional development, program resources, monthly newsletters and ongoing intervention support. Outcomes include change in total PA (accelerometers) within centre hours, gross motor skill development (Test of Gross Motor Development-2), weight status (body mass index), bone strength (Sunlight MiniOmni Ultrasound Bone Sonometer), self-regulation (Heads-Toes-Knees-Shoulders, executive function tasks, and proxy-report Temperament and Approaches to learning scales), and educator and parent self-efficacy. Extensive quantitative and qualitative process evaluation and a cost-effectiveness evaluation will be conducted. The Jump Start intervention is a

  17. Increasing physical activity among young children from disadvantaged communities: study protocol of a group randomised controlled effectiveness trial

    Directory of Open Access Journals (Sweden)

    Rebecca M. Stanley

    2016-10-01

    Full Text Available Abstract Background Participation in regular physical activity (PA during the early years helps children achieve healthy body weight and can substantially improve motor development, bone health, psychosocial health and cognitive development. Despite common assumptions that young children are naturally active, evidence shows that they are insufficiently active for health and developmental benefits. Exploring strategies to increase physical activity in young children is a public health and research priority. Methods Jump Start is a multi-component, multi-setting PA and gross motor skill intervention for young children aged 3–5 years in disadvantaged areas of New South Wales, Australia. The intervention will be evaluated using a two-arm, parallel group, randomised cluster trial. The Jump Start protocol was based on Social Cognitive Theory and includes five components: a structured gross motor skill lesson (Jump In; unstructured outdoor PA and gross motor skill time (Jump Out; energy breaks (Jump Up; activities connecting movement to learning experiences (Jump Through; and a home-based family component to promote PA and gross motor skill (Jump Home. Early childhood education and care centres will be demographically matched and randomised to Jump Start (intervention or usual practice (comparison group. The intervention group receive Jump Start professional development, program resources, monthly newsletters and ongoing intervention support. Outcomes include change in total PA (accelerometers within centre hours, gross motor skill development (Test of Gross Motor Development-2, weight status (body mass index, bone strength (Sunlight MiniOmni Ultrasound Bone Sonometer, self-regulation (Heads-Toes-Knees-Shoulders, executive function tasks, and proxy-report Temperament and Approaches to learning scales, and educator and parent self-efficacy. Extensive quantitative and qualitative process evaluation and a cost-effectiveness evaluation will be conducted

  18. Remarkable Anti-Trichomonas vaginalis Activity of Plants Traditionally Used by the Mbyá-Guarani Indigenous Group in Brazil

    Directory of Open Access Journals (Sweden)

    Clara Lia Costa Brandelli

    2013-01-01

    Full Text Available Trichomonas vaginalis, a flagellate protozoan, is the causative agent of trichomonosis, the most common nonviral sexually transmitted disease worldwide. Taking into account the increased prevalence of metronidazole-resistant isolates, alternative drugs are essential for the successful treatment. Natural products are the source of most new drugs, and popular wisdom about the use of medicinal plants is a powerful tool in this search. In this study, the activity of 10 medicinal plants extensively used in daily life by Mbyá-Guarani indigenous group was evaluated against seven different T. vaginalis isolates. Among the aqueous extracts tested, Verbena sp. (Guachu ka'a in Mbyá-Guarani language and Campomanesia xanthocarpa (Guavira in Mbyá-Guarani language showed the highest activity against T. vaginalis with MIC value of 4.0 mg/mL reaching 100% of efficacy against the parasite. The kinetic growth assays showed that the extracts promoted complete growth abolishment after 4 h of incubation. In addition, the extracts tested did not promote a significant hemolytic activity against human erythrocytes. Our results show for the first time the potential activity of Verbena sp. and C. xanthocarpa against T. vaginalis. In addition, this study demonstrates that indigenous knowledge is an important source of new prototype antiprotozoal agents.

  19. Remarkable anti-trichomonas vaginalis activity of plants traditionally used by the Mbyá-Guarani indigenous group in Brazil.

    Science.gov (United States)

    Brandelli, Clara Lia Costa; Vieira, Patrícia de Brum; Macedo, Alexandre José; Tasca, Tiana

    2013-01-01

    Trichomonas vaginalis, a flagellate protozoan, is the causative agent of trichomonosis, the most common nonviral sexually transmitted disease worldwide. Taking into account the increased prevalence of metronidazole-resistant isolates, alternative drugs are essential for the successful treatment. Natural products are the source of most new drugs, and popular wisdom about the use of medicinal plants is a powerful tool in this search. In this study, the activity of 10 medicinal plants extensively used in daily life by Mbyá-Guarani indigenous group was evaluated against seven different T. vaginalis isolates. Among the aqueous extracts tested, Verbena sp. (Guachu ka'a in Mbyá-Guarani language) and Campomanesia xanthocarpa (Guavira in Mbyá-Guarani language) showed the highest activity against T. vaginalis with MIC value of 4.0 mg/mL reaching 100% of efficacy against the parasite. The kinetic growth assays showed that the extracts promoted complete growth abolishment after 4 h of incubation. In addition, the extracts tested did not promote a significant hemolytic activity against human erythrocytes. Our results show for the first time the potential activity of Verbena sp. and C. xanthocarpa against T. vaginalis. In addition, this study demonstrates that indigenous knowledge is an important source of new prototype antiprotozoal agents.

  20. Empirical validation of statistical parametric mapping for group imaging of fast neural activity using electrical impedance tomography.

    Science.gov (United States)

    Packham, B; Barnes, G; Dos Santos, G Sato; Aristovich, K; Gilad, O; Ghosh, A; Oh, T; Holder, D

    2016-06-01

    Electrical impedance tomography (EIT) allows for the reconstruction of internal conductivity from surface measurements. A change in conductivity occurs as ion channels open during neural activity, making EIT a potential tool for functional brain imaging. EIT images can have  >10 000 voxels, which means statistical analysis of such images presents a substantial multiple testing problem. One way to optimally correct for these issues and still maintain the flexibility of complicated experimental designs is to use random field theory. This parametric method estimates the distribution of peaks one would expect by chance in a smooth random field of a given size. Random field theory has been used in several other neuroimaging techniques but never validated for EIT images of fast neural activity, such validation can be achieved using non-parametric techniques. Both parametric and non-parametric techniques were used to analyze a set of 22 images collected from 8 rats. Significant group activations were detected using both techniques (corrected p  <  0.05). Both parametric and non-parametric analyses yielded similar results, although the latter was less conservative. These results demonstrate the first statistical analysis of such an image set and indicate that such an analysis is an approach for EIT images of neural activity.