1,720,954 research outputs found
Oxicombustión en motores de encendido provocado con producción de oxígeno in-situ mediante membranas de separación
No full text[ES] Las emisiones contaminantes generadas por la actividad humana constituyen uno de los principales problemas medioambientales de la actualidad, motivo
por el cual en los últimos años se han incrementado los esfuerzos en su control y reducción. Una de las tecnologías desarrolladas en los últimos años como medio
para la reducción de la emisión de NOx y la captura de CO2 en los procesos de
combustión, es la oxicombustión sin nitrógeno. El presente proyecto aborda el estudio de esta tecnología e investiga la viabilidad de su aplicación en motores de
encendido provocado destinados a aplicaciones móviles.[EN] Pollutant emissions generated by human activity are one of the main environmental problems of today, beause of that, the efforts to control and reduce them
have increased in recent years. One of the technologies developed in recent years as a way to reduce the emission of NOx and the capture of CO2 in combustion
processes, is oxycombustion without nitrogen. This project addresses the study of this technology and investigates the feasibility of its application in spark-ignition
engines intended for mobile applications.[CA] Les emissions contaminants generades per l’activitat humana constitueixen
un dels principals problemes mediambientals de l’actualitat, motiu pel qual en
els últims anys s’han incrementat els esforços en el seu control i reducció. Una
de les tecnologies desenvolupades al llarg dels últims anys com mitjà per a la
reducció de l’emissió de NOx i la captura de CO2 en els processos de combustió,
és l’oxicombustió sense nitrogen. El present projecte aborda l’estudi d’aquesta
tecnologia i investiga la viabilitat de la seua aplicació en motors d’encés provocat
destinats a aplicacions mòbils.Cuenca Alcocel, I. (2020). Oxicombustión en motores de encendido provocado con producción de oxígeno in-situ mediante membranas de separación. Universitat Politècnica de València. https://riunet.upv.es/handle/10251/148619TFG
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
On bio-inspired induced drag reduction techniques
Get PDFThe current study was aimed at identifying wing planform
geometries which favours low induced drag. The
geometries were defined by mathematical functions and
following a subsequent parametric study, with a focus
on sweep angle and taper ratio, inspired by birds wings
and aquatic animals flukes or caudal fins planforms. The
parametric studies were carried out using a vortex lattice
method (VLM) which was validated with experimental
data from literature. The main finding is a confirmation
of the fact that the maximum Oswald efficiency factor, e
is not exclusive to an elliptical wing planform. Despite
its apparent simplicity, in fact a swept-back-tapered wing
with a linear chord distribution can reach e = 1, the limit
or minimum induced drag established from elliptical lift
distribution. Moreover, the crescent wing geometry, such
as the one displayed by the swift, can even surpass this
limit
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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