1,720,955 research outputs found
Especificación de la altura de chimeneas en atmósferas con inversiones térmicas particulares
Get PDFEl método simple que se utiliza como primera medida a la hora de dimensionar chimeneas industriales no tiene en cuenta todos los factores climáticos particulares del emplazamiento. En la ciudad de San Nicolás de los Arroyos, existe un fenómeno de inversión térmica que provoca una alteración en la elevación de las plumas de las mismas. Este efecto influye de una manera directa en la diseminación de los contaminantes, aumentando la precipitación de particulados en el río. Se presenta en este trabajo el estudio del cálculo estándar de dimensionamiento de plumas de chimeneas por métodos simples y se propone su corrección para este caso en particular de San Nicolás. Para el mismo se midieron variables atmosféricas relacionadas con el comportamiento de la pluma en ambientes con inversiones térmicas, se realizó un análisis de los datos y una correlación para lograr un factor de corrección de las fórmulas de cálculo simple.The simple method that is used as the first measure when dimensioning industrial chimneys does not take into account all the particular climatic factors of the site. In the city of San Nicolás de los Arroyos, there is a phenomenon of thermal inversion that causes an alteration in the elevation of the feathers of the same ones. This effect directly influences the dissemination of pollutants, increasing the precipitation of particulates in the river per meter square. We present in this work the study of the standard calculation of dimensioning of chimney feathers by simple methods and its correction is proposed for this particular case. For the same, we measured atmospheric variables related to the behavior of the pen in environments with thermal inversions, we performed a data analysis and a correlation to achieve a correction factor of simple calculation equations.Fil: Tielli, Matías. Universidad Tecnológica Nacional (Argentina). Facultad Regional San Nicolás..Fil: Hetze, Vanesa. Universidad Tecnológica Nacional (Argentina). Facultad Regional San Nicolás.
Red de distribución y generación distribuida en la cooperativa eléctrica de Ramallo
Get PDFSe presentan los primeros resultados de la colaboración entre la cooperativa eléctrica de Ramallo (COOSPRAL) y el Grupo de Investigación en Energías Renovables (GIDER) de la FRSN-UTN, con el objetivo de explorar la generación distribuida renovable en su área de influenciaFil: Coria, Mirko. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; ArgentinaFil: Buzzio, Sebastián. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; ArgentinaFil: Moreno, Natanael. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; ArgentinaFil: Tielli, Matías. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; ArgentinaFil: Hetze, Vanesa Betiana. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; ArgentinaFil: Rullo, Pablo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Tecnológica Nacional. Facultad Regional Rosario; Argentina. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; Argentina. Cooperativa eléctrica de Ramallo; ArgentinaFil: Gil, Santiago. Cooperativa eléctrica de Ramallo; ArgentinaFil: Dagoberto, Joaquín. Cooperativa eléctrica de Ramallo; Argentin
Comportamiento del viento en la ribera del Paraná
Get PDFLa evaluación del recurso eólico actualmente se realiza con métodos que no tienen en
cuenta las turbulencias del viento provocadas por las edificaciones de las ciudades.
Esto dificulta predecir la energía generada por aerogeneradores pequeños instalados
en zonas urbanas. En la ciudad de San Nicolás existe la convivencia entre un terreno
de muy baja rugosidad (río Paraná), y la alta rugosidad de la ciudad. Esto provoca
fenómenos muy complejos en el comportamiento del viento. Se estudia en este trabajo
el comportamiento del viento bajo estas circunstancias, mediante una simulación
computarizada y su posterior validación a partir de los resultados del registro de datos
de una estación meteorológica. Contrario a lo intuitivo, se determina que la
combinación de rugosidades separadas por desniveles produce una aceleración de los
vientos, aumento de la frecuencia en una dirección en particular y disminución de
ráfagas; condiciones que maximizan la posibilidad de instalaciones eólicas.The evaluation of the wind resource is currently carried out using methods that do not
take into account the wind turbulence caused by the buildings of the cities. This makes
it difficult to predict the energy generated by small wind turbines installed in urban
areas. In the city of San Nicolás exists the coexistence between a land of very low
roughness (Paraná river), and the high roughness of the city. This causes very
complex phenomena in wind behavior. We study in this work the behavior of the wind
under these circumstances, by means of a computerized simulation and its later
validation from the results of the data record of a meteorological station. Contrary to the
intuitive, it is determined that the combination of rugosities separated by unevenness
results in an acceleration of the winds, increase of the frequency in a particular
direction and decrease of bursts; Conditions that maximize the possibility of low power
wind turbines installations.Fil: Tielli, Matías. Universidad Tecnológica Nacional (Argentina). Facultad Regional San Nicolás..Fil: Hetze, Vanesa. Universidad Tecnológica Nacional (Argentina). Facultad Regional San Nicolás..Fil: Barbieri, Norberto. Universidad Tecnológica Nacional (Argentina). Facultad Regional San Nicolás.
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
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