213 resultados para Lucrecia


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Investigación original con el título: El bajo rendimiento escolar de los estudiantes argentinos en el programa PISA. Un análisis de los factores explicativos en perspectiva internacional

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El plan general del trabajo consiste en hacer expl??citas y comparar, con rigurosidad cient??fica, los m??todos de ense??anza que impl??citamente preocupa a todo profesor cuando trata de comunicar a sus alumnos la materia que imparte, en este caso la f??sica. Probar la efectividad de la Ense??anza Programada de F??sica a nivel universitario, compar??ndola con la tradicional. Se sigue el Sistema de Skinner de Ense??anza Programada y toda la investigaci??n se lleva a cabo durante dos cursos acad??micos teniendo como referencia 400 alumnos. A un grupo de alumnos de primer curso de la Secci??n de F??sica se les imparti?? un temario de F??sica por el m??todo de la ense??anza tradicional durante dos cursos; y el mismo temario, previamente elaborado, a otro grupo de la misma secci??n, tambi??n durante los mismos cursos por el m??todo de la Ense??anza Programada. Ambos grupos, y en ambos cursos fueron elegidos al azar comprobando, antes del experimento, que ambas muestras pertenec??an a la poblaci??n total, y que eran homog??neos intelectual y ps??quicamente. Se cont?? con la ayuda de la Ciencia Psicol??gica y Estad??stica. Se han medido ciertos factores de la inteligencia y de la personalidad del alumno que se cree tienen que ver con el aprendizaje de la F??sica. En base a esto se han preparado textos programados de F??sica General a nivel del primer curso de Ciencias F??sicas. Se ha probado que el valor de las correlaciones obtenidas, para las muestras tomadas, se puede extender a la poblaci??n, calculando los errores muestrales y los intervalos de confianza correspondientes. Se elige al azar dos muestras homog??neas intelecual y psiqu??camente de entre la poblaci??n estudiantil de F??sica y a cada una de ellas se les imparti?? un tipo de ense??anza distinto. Despu??s de aplicar la Teor??a Estad??stica de la significaci??n de la diferencia de medios en los dos tipos de ense??anza y resultados de este estudio di?? un 't' de student significativo, lo que demuestra que la ense??anza programada, ha dado mejor resultado en el aprendizaje de la f??sica general del primer curso de Facultad que la ense??anza tradicional.

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Resumen basado en el de la publicación

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Resumen basado en el de la publicaci??n

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Se recoge el articulado del Decreto 43/2015, de 10 de junio, por el que se regula la ordenaci??n y se establece el curr??culo de Educaci??n Secundaria Obligatoria en el Principado de Asturias, publicado en el BOPA (Bolet??n Oficial del Principado de Asturias) el 30 de junio de 2015. La publicaci??n incluye adem??s la metodolog??a did??ctica, los contenidos, los criterios de valuaci??n y est??ndares de aprendizaje evaluables de las distintas materias troncales, espec??ficas y de aqu??llas de libre configuraci??n auton??mica, y el total de sesiones lectivas de las distintas asignaturas de los ciclos educativos de la Educaci??n Secundaria Obligatoria.

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Contiene el Decreto 42/2015, de 10 de junio, por el que se regula la ordenaci??n y se establece el curr??culo del Bachillerato en el Principado de Asturias. Publicado en el BOPA (Bolet??n Oficial del Principado de Asturias) el 29 de junio de 2015. Incluye adem??s, la metodolog??a did??ctica, los contenidos, los criterios de valuaci??n y est??ndares de aprendizaje evaluables de las distintas materias troncales, espec??ficas y de aqu??llas de libre configuraci??n auton??mica, y el total de sesiones lectivas de las distintas asignaturas del Bachillerato.

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En el presente ensayo la autora reflexiona sobre varios aspectos de Los poderes omnímodos, de Alfredo Pareja Diezcanseco. Primero, el equilibrio entre las historias personales y la historia del país, más que de la vida del presidente Velasco Ibarra, parece ocuparse por reconstruir la memoria de una época de trágica importancia en el Ecuador, en el contexto de la historia mundial. Por otro lado, el personaje Pablo Canelos representa el arquetipo de una conciencia intelectual crítica, atenta, a veces incluso apegada al sentimiento, aunque padece de cierto desarraigo afectivo. En tercer lugar, los personajes femeninos por momentos parecen, otra vez, arquetipos, se destacan varios rasgos de Juanita Rincón: sus sentimientos casi siempre confusos respecto de sus relaciones y sus búsquedas afectivas, marcada por el parricidio y la orfandad materna temprana. Balbina Carrillo, construida a partir de valores femeninos tradicionales: afectuosa, sensible y sentimental, movida a complacer y a hacer feliz al hombre más allá de sus propias necesidades, pulsiones y deseos. Finalmente, en lo temático se reflexiona sobre el desencanto de los ideales revolucionarios frustrados. La novela puede considerarse una representación de cómo los ecuatorianos de la primera mitad del siglo XX enfrentaban la historia y la vida intelectual, política y social de su tiempo.

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Presenta las reseñas de los siguietnes libros: FERNANDO ALBÁN, CRISTINA BURNEO, SANTIAGO CEVALLOS E IVÁN CARVAJAL, LA CUADRATURA DEL CíRCULO. CUATRO ENSAYOS SOBRE LA CULTURA ECUATORIANA Quito: Corporación Cultural Orogenia, 2006, 297 pp. -- JUAN VALDANO, IDENTIDAD y FORMAS DE LO ECUATORIANO Quito: Eskeletra, 2006, 474 pp. -- CECILIA MAFLA BUSTAMANTE, ARí-sí-YES. ANÁLISIS LINGüíSTICO y EVALUACiÓN DE LAS TRADUCCIONES DE HUASIPUNGO AL INGLÉS Quito: Ediciones Abya-Yala, 2004. -- ROBERTO BOLAÑo, 2666 Barcelona: Anagrama, 2005, 1.125 pp. -- LUCRECIA MALDONADO, SALVO EL CALVARIO Quito: Planeta, 2005, 237 pp . -- RAÚL ARIAS, DUENDE ESCAPADO DEL ESPEJO Quito: Machete Rabioso Editores, 2006, 119 pp. -- JORGE ICAZA, TEATRO Quito: Comisión Nacional Permanente de Conmempraciones Cívicas I Libresa, 2006, 119 pp. -- MARíA LEONOR BAQUERIZO, LAs GRANDES COSAS SE PIERDEN EN LA NIEBLA Guayaquil: [s.i.1, 2005, 87 pp. -- RAÚL SERRANO SÁNCHEZ, CATÁLOGO DE ILUSIONES Quito: Eskeletra, 2006, 152 pp. -- CARLOS MARTíNEZ SARASOLA, NUESTROS PAISANOS LOS INDIOS Buenos Aires: Emecé Memoria Argentina, 2005. -- STALIN ALVEAR, EL REINO DE LOS VENCIDOS Quito: Libresa, Colección Crónica de sueños, 2006, 157 pp. -- MARCELO BÁEZ, DALTON OSORNO, EDITS., EL ESCOTE DE LO OCULTO: ANTOLOGÍA DEL RELATO PROHIBIDO Quito: b@ez.editor.es I Libresa, 2006, 183 pp. -- ALEYDA QUEVEDO ROJAS1 SOY MI CUERPO Quito: Libresa, 2006, 89 pp.

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This work is aimed at studying the adsorption mechanism of short chain 20-mer pyrimidinic homoss-DNA (oligodeoxyribonucleotide, ODN: polyC(20) and polyT(20)) onto CNT by reflectometry. To analyze the experimental data, the effective-medium theory using the Bruggemann approximation represents a Suitable optical model to account for the surface properties (roughness, thickness, and optical constants) and the size of the adsorbate. Systematic information about the involved interactions is obtained by changing the physicochemical properties of the system. Hydrophobic and electrostatic interactions are evaluated by comparing the adsorption oil hydrophobic CNT and oil hydrophilic silica and by Modulating the ionic Strength With and without Mg(2+). The ODN adsorption process oil CNT is driven by hydrophobic interactions only when the electrostatic repulsion is Suppressed. The adsorption mode results in ODN molecules in a side-on orientation with the bases (nonpolar region) toward the surface. This unfavorable orientation is partially reverse by adding Mg(2+). On the other hand, the adsorption oil silica is dominated by the strong repulsive electrostatic interaction that is screened at high ionic strength or mediated by Mg(2+). The cation-mediated process induces the interaction of the phosphate backbone (polar region) with the surface, leaving the bases free for hybridization. Although the general adsorption behavior of the pyrimidine bases is the same, polyC(20) presents higher affinity for the CNT Surface due to its acid-base properties.

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The water quality of many reservoirs in the world has been reduced due to percolation of contaminants to water, which can have natural or anthropogenic origin, increasing the level of genotoxic compounds in aquatic ecosystems. This fact has contributed to the reduction of environmental quality, and commitment the health of living beings that inhabit these ecosystems, including the human population. In this backdrop of reduced water quality, is the Lucrecia dam, which is a major surface water reservoirs by volume of semi-arid region of Rio Grande do Norte, and that has shown contamination by heavy metals, cyanobacteria toxic and the natural presence of Radon. The population that use this source has been showing high rates of cancer, popularly associated with the consumption of this water, with a prevalence about three times higher compared to the whole state of Rio Grande do Norte. Based on this, the present study aimed to evaluate the mutagenic potencial of surface water from the Lucrecia dam, using the Micronucleus Test in Tradescantia pallida (Trad-MN) and in human peripheral blood lymphocytes (CBMN) assay, as well as identify the concentrations of some heavy metals in this water. Water samples were collected on a dry season and a rainy season, in two distinct points. Moreover, in order to bring a completely view about the relationship of man-health-environment in this local, through the knowledge of knowing / acting environmental from residents of Lucrecia, and the use and perceptions they have about the dam of your city, a study of Environmental Perception was carried out with local residents. The results obtained for the both micronucleus test, showed significant results for the three points analyzed. The strongest mutagenic effect was observed in the dry season for both assays. Chemical analyses detected an increase of heavy metal levels in different points and season above the maximum allowed by legislation. Regarding the study of Environmental Perception with local residents, it was observed the knowledge of the environment that the residents have, as well as the strong ties and perceptions with the dam of the city. Thus, the combination of these two aspects (the genetic toxicity tests conducted in the dam together with analysis of environmental perception with the residents of Lucrecia) allowed to draw a more complete diagnosis on the local situation

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Landscape fires show large variability in the amount of biomass or fuel consumed per unit area burned. Fuel consumption (FC) depends on the biomass available to burn and the fraction of the biomass that is actually combusted, and can be combined with estimates of area burned to assess emissions. While burned area can be detected from space and estimates are becoming more reliable due to improved algorithms and sensors, FC is usually modeled or taken selectively from the literature. We compiled the peerreviewed literature on FC for various biomes and fuel categories to understand FC and its variability better, and to provide a database that can be used to constrain biogeochemical models with fire modules. We compiled in total 77 studies covering 11 biomes including savanna (15 studies, average FC of 4.6 t DM (dry matter) ha 1 with a standard deviation of 2.2), tropical forest (n = 19, FC = 126 +/- 77), temperate forest (n = 12, FC = 58 +/- 72), boreal forest (n = 16, FC = 35 +/- 24), pasture (n = 4, FC = 28 +/- 9.3), shifting cultivation (n = 2, FC = 23, with a range of 4.0-43), crop residue (n = 4, FC = 6.5 +/- 9.0), chaparral (n = 3, FC = 27 +/- 19), tropical peatland (n = 4, FC = 314 +/- 196), boreal peatland (n = 2, FC = 42 [42-43]), and tundra (n = 1, FC = 40). Within biomes the regional variability in the number of measurements was sometimes large, with e. g. only three measurement locations in boreal Russia and 35 sites in North America. Substantial regional differences in FC were found within the defined biomes: for example, FC of temperate pine forests in the USA was 37% lower than Australian forests dominated by eucalypt trees. Besides showing the differences between biomes, FC estimates were also grouped into different fuel classes. Our results highlight the large variability in FC, not only between biomes but also within biomes and fuel classes. This implies that substantial uncertainties are associated with using biome-averaged values to represent FC for whole biomes. Comparing the compiled FC values with co-located Global Fire Emissions Database version 3 (GFED3) FC indicates that modeling studies that aim to represent variability in FC also within biomes, still require improvements as they have difficulty in representing the dynamics governing FC.