Producción Científica UPeU

URI permanente para esta comunidadhttps://cris.upeu.edu.pe/handle/123456789/1

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1913 - 191931980 - 200942010 - 202333

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Autor/a: search.filters.author.Vasquez Villanueva, Carlos Alberto

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    Historia de Chile. Pedro de Valdivia, Crescente Errazuris.
    (1913-01-01)
    Villanueva Carlos A. Historia de Chile. Pedro de Valdivia, Crescente Errazuris. In: Journal de la Société des Américanistes. Tome 10 n°1, 1913. pp. 296-299.
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    Sanchez (Manuel Segundo). Bibliografia, venezolanista (Bibliographie vénézuélienne). Empresa El Gojo. Caracas, 1914, 1 vol. 494 p.
    (1919-01-01)
    Villanueva C. Sanchez (Manuel Segundo). Bibliografia, venezolanista (Bibliographie vénézuélienne). Empresa El Gojo. Caracas, 1914, 1 vol. 494 p. In: Journal de la Société des Américanistes. Tome 11, 1919. p. 345.
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    Vertical distribution of ozone at Marambio, Antarctic Peninsula, during 1987–1999
    (2003-09-08)
    Juha Karhu
    ;
    P. Taalas
    ;
    Juhani Damski
    ;
    Jussi Kaurola
    ;
    M. Ginzburg
    The vertical distribution of ozone at Marambio (64°S, 56°W) has been studied using ozonesonde measurements for 1990–1999. Total ozone has been studied using Dobson spectrophotometer measurements for 1987–1999. Marambio is well placed to study the Antarctic ozone depletion mechanism because it is frequently located inside, outside, and in the edge region of the polar vortex and sees the early return of sunshine in late winter. The ozone data have been classified according to the location of the polar vortex with respect to Marambio. The vortex edge definition based on potential vorticity (PV) and its gradient has been compared to two other methods. The method used here gives better results than the use of predetermined PV limits or the use of maximum PV gradient only. The Marambio total ozone records have been compared to the 11‐year (1957–1967) record of the nearby Argentine Islands (65°S, 64°W) to estimate long‐term ozone changes over the Antarctic Peninsula. The largest decreases of ozone during 1987–1999 were observed in the lower stratosphere in July–August in the polar vortex edge region, as well as inside the vortex in September–October. Our analysis does not give indications of an ozone recovery so far. The Marambio data show that since the mid‐1990s the magnitude of the seasonal ozone decline inside and in the edge region of the vortex has remained at roughly a constant level. Outside the vortex in September–December, as well as from midsummer to midwinter (January–June), ozone levels have remained practically unchanged during the whole period from 1987 until 1999.
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    Estimating daily solar radiation in the Argentine Pampas
    (2003-12-30)
    Guillermo P. Podestá
    ;
    Liliana Núñez
    ;
    ;
    Marı́a A. Skansi
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    Measurements from ground and balloons during APE-GAIA – A polar ozone library
    (2005-01-01)
    H. K. Roscoe
    ;
    S. R. Colwell
    ;
    J. D. Shanklin
    ;
    Juha Karhu
    ;
    P. Taalas
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    Ultraviolet climatology over Argentina
    (2006-09-13)
    Eduardo Luccini
    ;
    Alexander Cede
    ;
    Rubén D. Piacentini
    ;
    ;
    Pablo O. Canziani
    Satellite‐derived climatologies of UV index (UVI) and erythemal daily dose were determined for Argentina at a geographical resolution of 0.5° latitude by 0.5° longitude. Total Ozone Mapping Spectrometer climatology of key input parameters was used to calculate the clear‐sky ground‐level solar UV irradiance. NASA Surface meteorology and Solar Energy cloud cover data were used to determine the UV attenuation by clouds. Two cases were tested: (1) monthly averages of total cloud cover and (2) monthly averages for three ranges of cloud cover percentage (0–10%, 10–70%, and 70–100%). Case 2, with smaller biases, was selected. Measured erythemal irradiance at seven stations of the Argentine Ultraviolet Monitoring Network was used to validate the satellite‐derived climatologies, as well as to estimate aerosol parameters, surface albedo corrections, and UV cloud transmittance for the calculations. Annual average biases of the monthly mean satellite‐derived UVI and erythemal daily dose with respect to the ground measurements are mostly within ±10%. The strong longitudinal gradient of UV levels toward the Andes Mountains is emphasized. Very high UVI and erythemal daily dose values are registered in the northwestern tropical high‐elevation Andean plateau, with extreme monthly means above 18 and 10 kJ/m 2 respectively, in December–January. Even northern low‐elevation regions show averages over 12 and 7 kJ/m 2 , respectively. On average, clouds attenuate the clear‐sky erythemal irradiance by less than 20% for most of the continental region during all months. UV levels are considerably higher than those for equivalent regions in the Northern Hemisphere.
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    Capacity Building Models Through Distance Education
    (2014-01-01)
    ;
    Marcia Ortega
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    La Matriz de Variables (La MAVA): Brújula en la elaboración de proyectos de investigación
    (2016-02-04)
    La dificultad para elaborar proyectos de investigacion radica mayormente en el manejo escaso de la informacion teorica sistematica sobre la secuencia del proceso de investigacion.  El presente tiene el objetivo  de proponer La Matriz de Variables (La MAVA), como una brujula para la elaboracion de proyecto de investigacion, que muy bien podria ser utilizada  para mejorar la ensenanza en las asignaturas de investigacion, asi como para facilitar el desarrollo de investigaciones generadas para obtener el titulo profesional o un grado aca-demico.  Una vez establecido el tema de investigacion, hay que determinar las variables, al mismo tiempo el tipo de investigacion. La elaboracion de La MAVA de la investigacion, con sus respectivas dimensiones, indicadores e indices es de primordial importancia; teniendo correctamente definidas las variables, dimensiones e indicadores, es casi imposible que  la investigacion  pierda su orientacion, porque estan presentadas y abordadas en toda la investigacion, desde la escritura del titulo hasta la redaccion de las conclusiones. Es importante entender que dicha matriz de variables e indicadores se elabora teniendo en cuenta la ramificacion de las variables. La matriz de variables sirve de brujula (mejor termino usado para su cometido), derrotero y guia para la elaboracion del proyecto de investigacion; de esa forma, el investigador  no se desviara ni a izquierda ni a derecha. Viendo el caso practico de la elaboracion de la descripcion del problema, la matriz de variables sirve de guia, porque solo se debe describir en funcion de las variables, dimensiones e indicadores y asi tambien cada parte del proyecto de investigacion.
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    Análisis de los factores y su relación con la informalidad de los comerciantes del mercado N° 3–Huayco, de la ciudad de Tarapoto
    (2016-09-19)
    Rosita Almendra Rojas Arévalo
    ;
    La presente investigacion tiene como objetivo: determinar como se relacionan los factores con la informalidad de los comerciantes del mercado N° 3 – Huayco, de la ciudad de Tarapoto 2015. El presente estudio es de tipo correlacional de corte transversal, de diseno no experimental. Se concluyo que la relacion de los factores con dificultad sectorial, sustenta que a mayor nivel de condicion social aceptable, mejores relaciones afectivas, mayor generacion de confianza social y mayor comunicacion afectiva, menor sera la dificultad sectorial.