1,720,953 research outputs found
Calculo De Paneles Solares Para Instalación De Bombas Sumergibles En Soysongo Provincia De Nazca
No full textEste trabajo de suficiencia profesional tiene por finalidad describir el trabajo y la
participación desempeñada por el investigador en la empresa Ferromar E.I.R.L en el
proyecto Bombeo de agua con paneles solares. El proyecto involucró el diseño y cálculo
de la estructura fotovoltaica ,la electrónica de potencia , plano de diagramas uniflares para
la instalación en la zona identificada, la red eléctrica se generó atraves de paneles solares
para alimentar una bomba sumergible trifásica 7.5 HP de 380 VAC 60HZ hasta la
construcción de estas.
En la provincia de Nazca, Ica – Perú, se instaló una bomba solar fotovoltaica
sumergible para impulsar el agua desde un pozo tubular hasta el reservorio superior para
riego tecnificado de arboles de palta . Para medir los parámetros climáticos, se instaló una
estación meteorológica, que mide la radiación solar, la temperatura, la humedad relativa
y la velocidad del viento. En el sistema de bombeo solar se instalaron sensores eléctricos
e hidráulicos (corriente, voltaje, flujo másico y presión hidráulica) para evaluar las
eficiencias en cada proceso de transformación de energía. También se evaluaron los
parámetros económicos del proyecto para analizar la recuperación de la inversión
comparado con tecnologías convencionales de bombeo. Los resultados indican que el
sistema de bombeo fotovoltaico funciona desde las 07:30 horas hasta las 15:30 horas, con
un promedio de 8 horas por día. Los resultados del análisis económico indican que la
inversión del sistema fotovoltaico, comparado a la electricidad de la red pública, se
recupera en 5.3 años, comparado con los costos de generación eléctrica a partir de un
generador a combustión interna (diésel y/o GLP) la recuperación es en 2.8 años. Los
resultados obtenidos después de la instalación según las mediciones realizadas con los
instrumentos de medición fueron satisfactorios. Para finalizar, se concluyó que el
proyecto fue entregado a la empresa KIMBERLY E.I.R.L en el tiempo planificado y
cumpliendo con todas las normas y estándares de calidad de construcción de la central
fotovoltaica. Gracias a este logro, todo el equipo del proyecto fue felicitado por el cliente.The purpose of this work of professional sufficiency is to describe the work and participation
carried out by the researcher in the company Ferromar E.I.R.L in the project Pumping water with
solar panels. The project involved the design and calculation of the photovoltaic structure, power
electronics, plan of unitary diagrams for the installation in the identified area, the electrical
network was terminated through solar panels to feed a 7.5 HP three-phase submersible pump of
380 VAC 60HZ until their construction.
In the province of Nazca, Ica - Peru, a submersible photovoltaic solar pump was installed to
drive water from a tubular well to the upper reservoir for technical irrigation of avocado trees. To
measure the climatic parameters, a weather station was installed, which measures solar radiation,
temperature, relative humidity and wind speed. Electrical and hydraulic sensors (current, voltage,
mass flow, and hydraulic pressure) were installed in the solar pumping system to evaluate the
efficiencies in each energy transformation process. The economic parameters of the project were
also evaluated to analyze the recovery of the investment compared to conventional pumping
technologies. The results indicate that the photovoltaic pumping system works from 07:30 am to
03:30 pm, with an average of 8 hours per day. The global efficiency of the system is 7%, which
corresponds to a photovoltaic module efficiency of 12%. The hydraulic efficiency varies between
55% and 75%, while the mass flow varies between 2 kg/s and 6.3 kg/s, which corresponds to a
solar irradiance of 200 W/m2 and 1190 W/m2 respectively. The results of the economic analysis
indicate that the investment of the photovoltaic system, compared to electricity from the public
network, is recovered in 5.3 years, compared to the costs of electricity generation from an internal
combustion generator (diesel and/or LPG). payback is in 2.8 years. The results obtained after the
installation according to the measurements made with the measuring instruments were
satisfactory. Finally, it was concluded that the project was delivered to the company KIMBERLY
E.I.R.L in the planned time and complying with all the norms and construction quality standards
of the photovoltaic plant. Thanks to this achievement, the entire project team was congratulated
by the client
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
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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