1,720,986 research outputs found
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
Estimating evaporation with the Bowen ratio: joining a data rejection criterion and reconstruction with multiple-point statistics
No full textThe error that affects meteorological measurements can have a strong impact on evaporation estimated with the Bowen ratio method. Unreliable values of evaporation can be rejected according to some given criteria. However, if the rejected values of evaporation are not properly replaced, the cumulated estimates of evaporation can significantly differ from the true ones. In this work a procedure that uses a rejection criterion based on error propagation theory and multiple-point statistics to simulate the rejected evaporation values is proposed. In multiple-point statistics simulation, the evaporation values that are not rejected are used as training data using a direct sampling algorithm. The methodology is tested on a meteorological data set collected from June 2009 to June 2011 at a station located in the Po plain (Italy). For the considered data set, the cumulated evaporation computed neglecting the rejected values is underestimated by at least 30% with respect to the cumulated evaporation computed with the proposed procedure. In addition, comparing the time series obtained by simulating the data rejected with diverse acceptance thresholds, it is possible to provide helpful guidelines for the selection of the proper threshold, which is therefore totally consistent with the proposed procedure
Improving estimates of evaporation with the "Bowen ratio" method
Full text linkThe application of the Bowen ratio method to estimate evaporation is heavily affected by uncertainties on the measured quantities. Standard techniques of error propagation can
be used to reject, from a time series of hydro-meteorological variables, the measurements collected at time steps for which a reliable estimate of evaporation cannot be computed. However, simply discarding some values might introduce a bias in the cumulative evaporation for long time intervals, also depending on the threshold of acceptance. One solution is to use a direct sampling technique, based on multiple-point statistics simulation, to integrate the time series of reliable evaporation estimates. In this work we test the application of this technique on a two-years-long time series of data collected with a hydro-meteorological station located in the Po plain (Italy). In particular, we explore the impact that a different threshold of acceptance has on the final estimates of evapotranspiration. The results obtained up to date allow to evaluate the impact that a reject-only strategy has on the estimates of evaporation, and provide guidelines for the selection of reliable threshold of acceptance
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
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