1,720,954 research outputs found
Análisis de la variación multitemporal de la pérdida de cobertura boscosa en el C. P de Shambillo A y B – Padre Abad en el periodo 2005 a 2020
Get PDFEl objetivo de este estudio fue determinar la Variación Multitemporal de la pérdida de cobertura boscosa en el período 2005 a 2020 a través de imágenes satelitales Landsat 7 ETM+ y Landsat 8OLI, recalcando que la deforestación es un proceso indetenible a nivel global. Esta investigación se realizó en C.P. Shambillo A y B, en el distrito y provincia de Padre Abad - Ucayali (893 ha) para el beneficio directo de 91 palmicultores de ASHPASH. La pérdida de cobertura boscosa en los últimos 15 años fue de 722 ha, lo que indica que un total del 81% del área total tiene otros usos, validado con una Precisión Global del 88% y una índice kappa de 0,82 que nos indica como una excelente clasificación y una TAD fue de 11,3 ha/año. El mapa de clasificación supervisada de cobertura vegetal indicó 8 clases; palma 372 ha, purma 116 ha, pastizal 30 ha, población 20 ha, cultivos 72 ha, red vial 40 ha, río 32 ha y bosque 211 ha. En conclusión, se determinó la cobertura boscosa, se validó los resultados, se halló la TAD y curva de perdida de boque y se realizó el mapa de cobertura vegetal del C. P. de Shambillo.LIMAEscuela Profesional de Ingeniería AmbientalGestión Ambienta
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Eficiencia de tratamiento de las aguas domésticas mediante HAFSV con la especie Zantedeschia aethiopica en Viquez – Lurigancho (Perú)
Get PDFEl objetivo de esta investigación fue evaluar la eficiencia de remoción de componentes químicos del agua doméstica así como de microorganismos mediante un humedal artificial de flujo subsuperficial vertical con la especie emergente de Zantedeschia aethiopica (cartucho). Los humedales artificiales son una tecnología viable para tratar aguas residuales domésticas en el sector rural debido a su bajo costo de operación y simplicidad en el manejo. Por ello el uso de humedales artificiales para el tratamiento de aguas residuales domésticos es una alternativa viable y económica. El tratamiento a planta piloto con humedal subsuperficial de flujo vertical con la especie emergente de Zantedeschia aethiopica se logró una eficiencia de remoción al 49% de los componentes químicos y microbiológicos, para un caudal de 0.67 L/seg con un TRH de 48 horas. Los parámetros como; PH, OD, T°, μS/cm, DBO, DQO, nitritos y coliformes totales y fecales fueron comparados con el ECA (D.S N° 015-2015-MINAM) categoría 3 para riego de vegetales de tallo alto y bajo, los cuales cumplieron con lo establecido en la norma indicada. La especie ornamental usada entrega un valor estético al entorno, junto a un posible beneficio económico para la población usuaria del sistema
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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