1,721,053 research outputs found
Dia de les biblioteques 2022. [vídeo]
No full textAntoni Morell i Mestre es l'autor de les aquarel·lesCom cada dia 24 d'octubre se celebra el Dia de les Biblioteques
UNA METODOLOGÍA DE ANÁLISIS DE FACIES HIDROQUÍMICA APLICADA AL ESTUDIO DE LA INTRUSIÓN MARINA EN ACUÍFEROS DETRÍTICOS COSTEROS: APLICACIÓN A LA PLANA DE OROPESA (CASTELLÓN)
No full textA new methodology of Hydrochemical Facies Analysis has been drawn up. The use of this methodology in the study of salinization problems of coastal aquifers allows to differentiate the stages of active seawater intrusion from the stages of refreshening. The methodology defines that each stage is characterized by a different hydrochemical facies sequence. The recognition of the sequence allows to outline the real conditon of the aquifers as far as the seawater intrusion processes are concerned, i.e. if the aquifers are under the prevailing influence of intruding seawater or feeding fresh waters. This recognition is carried out in an effective and detached way, being more difficult to obtain similar information through the traditional approaches based on the evaluation of salinity and hydrogeological data. The methodology has been applied in the framework of the studies of salinization processes of Oropesa Plain aquifer. In this case it has been determined that variations of intrusion front position, due to the succession of humid and dry periods, correspond to variations in type and sequence of hydrochemical faciesSe expone una metodología de Análisis de Facies Hidroquímica (A.F.H.) cuya aplicación permite diferenciar las etapas de avance del frente marino (intrusión activa) de aquellas de retroceso del frente (retroceso) y, por tanto, profundizar en el estudio de los procesos de salinización por intrusión marina. Dicha metodología determina que existe una sucesión de facies característica para cada uno de las dos etapas mencionadas y permite definir el estado real del acuífero frente al proceso de salinización, superando la caracterización tradicional basada en datos de salinidad. La metodología ha sido aplicada al acuífero detrítico de la Plana de Oropesa, donde se ha determinado que la variación de la posición del frente de intrusión, regulada por la alternancia de periodos secos y húmedos, da lugar a variaciones en el tipo de facies hidroquímica
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
Groundwater pollution in quaternary aquifer of Vitoria - Gasteiz (Basque Country, Spain)
Full text linkAs a result of diverse changes in land use and in water-resource management in the high basin of the Zadorra River (Basque Country), an important loss of water resources and an intense contamination by nitrogen compounds has taken place. The purpose of this paper is to detail the land transformations that have taken place on the aquifer since the 1950s: increase of drainage network, change from dry to irrigated farming, and diversion of rivers at the aquifer unit inlet. Furthermore, we analyze the impact of these transformations on the hydrodynamics and water quality of this aquifer system
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
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