1,720,953 research outputs found
Estudio de viabilidad técnica, financiera y ambiental de conversión de flotilla de vehículos de combustión interna del CATIE, a vehículos eléctricos
Full text linkProyecto de Graduación (Licenciatura en Mantenimiento Industrial) Instituto Tecnológico de Costa Rica, Escuela de Ingeniería Electromecánica, 2024Esta tesis cumple con el objetivo ODS 12:
garantizar modalidades de consumo y producción sostenibles.
Meta 4:
lograr la gestión ecológicamente racional de los productos químicos y de todos los desechos a lo largo de su ciclo de vida, de conformidad con los marcos internacionales convenidos, y reducir significativamente su liberación a la atmósfera, el agua y el suelo a fin de minimizar sus efectos adversos en la salud humana y el medio ambiente.En el contexto de la creciente preocupación por la sostenibilidad ambiental y la
necesidad de reducir las emisiones de gases de efecto invernadero, este estudio tiene como
objetivo principal evaluar la factibilidad de migrar los vehículos de combustión interna a
vehículos eléctricos en el Centro Agronómico Tropical de Investigación y Enseñanza
(CATIE) ubicado en Turrialba, Costa Rica.
Para alcanzar este objetivo, se llevó a cabo un análisis exhaustivo del mercado de
vehículos eléctricos, considerando las características específicas del CATIE en términos de
requerimientos operativos y de infraestructura de carga. Además, se diseñó una acometida
eléctrica adaptada a las necesidades del centro, se realizó un análisis comparativo de los
costos del ciclo de vida de diferentes modelos de vehículos, y se estimaron las emisiones
reducidas que se podrían lograr con la adopción de vehículos eléctricos.
Se encontró que los vehículos que pueden satisfacer las necesidades que el CATIE
debe cumplir para poder llevar a cabo sus operaciones son el Aion V Plus, el BYD Tang EV
y la buseta Yutong D8E, además se encontró que no hay una alternativa eléctrica para las
Toyotas Hilux ya que no hay vehículos tipo pick up eléctricas con tracción 4x4, que tengan
garantía o soporte técnico en el país. Se hizo el estudio de la infraestructura eléctrica necesaria
y se diseñó la acometida eléctrica. Posteriormente, se determinó que ningún modelo eléctrico
de los seleccionados son viables financieramente según el VAN (Valor Actual Neto) que dio
como resultado el ACCV (Análisis del Costo del Ciclo de Vida), esto debido a las
exoneraciones de impuestos que goza el CATIE que abarata a los vehículos de combustión
interna, además de la necesidad de una infraestructura eléctrica cara. Finalmente se determinó
que los vehículos eléctricos conllevan a una disminución importante de las emisiones de CO2
en comparación con los vehículos de combustión interna. Por lo que se concluyó que desde
el punto de vista ambiental son altamente viables y el CATIE puede tomar este aspecto a la
hora de tomar una decisión a futuro.In the context of the growing concern for environmental sustainability and the need to reduce
greenhouse gas emissions, this study aims to evaluate the feasibility of transitioning internal
combustion vehicles to electric vehicles at the Centro Agronómico Tropical de Investigación
y Enseñanza (CATIE) located in Turrialba, Costa Rica.
To achieve this goal, a comprehensive analysis of the electric vehicle market was carried out,
considering the specific characteristics of CATIE in terms of operational requirements and
charging infrastructure. Additionally, an electric supply adapted to the center's needs was
designed, a comparative analysis of the life cycle costs of different vehicle models was
conducted, and the reduced emissions that could be achieved with the adoption of electric
vehicles were estimated.
It was found that the vehicles capable of meeting CATIE's operational needs are the Aion V
Plus, the BYD Tang EV, and the Yutong D8E minibus. It was also found that there is no
electric alternative for the Toyota Hilux since there are no 4x4 electric pickup trucks with
warranty or technical support in the country. The necessary electric infrastructure was
studied, and the electric supply was designed accordingly. Subsequently, it was determined
that none of the selected electric models are financially viable according to the NPV resulting
from the LCCA (Life Cycle Costa Analysis), due to the tax exemptions enjoyed by CATIE
that make internal combustion vehicles cheaper, in addition to the need for expensive electric
infrastructure.
Finally, it was concluded that electric vehicles lead to a significant decrease in CO2 emissions
compared to internal combustion vehicles. Therefore, it was concluded that from an
environmental perspective, they are highly viable, and CATIE can consider this aspect when
making future decisions.Centro Agronómico Tropical de Investigación y Enseñanza (CATIE
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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