1,720,964 research outputs found
Assessment of the Chain Dependence Relationships Between Geology, Soil Properties and Grape Composition Using a Metric Generalization of Partial Least Squares Regression
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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
The disjointed influence of soil and climate on grape productivity and quality. An assessment by OMCIA-PLSR statistics on a case study in southern Italy
No full textThis paper reports the results of an investigation aiming to assess: i) the influence of soil and/or climate on the qualitative and quantitative features of grape, and, ii) the consistency of soil-wine-grape relationships under contrasting climatic conditions. The grapes were from Falanghina which is a relevant autochthonous vineyard of Southern Italy. To stress results, the analysis considered two different years (2002 and 2003), characterised by very contrasting climatic conditions in terms of both rain and temperature. Differences in the mean values of grape characteristics from one year to another were statistically evaluated using the usual student t-test. Relationships between soil properties and 2002-2003 grape variables were then simultaneously evaluated using the explorative OMCIA-PLSR statistics. OMCIA-PLSR is a new multivariate statistical method for making predictive models and belonging to the class of the explorative data analysis. Titratable acidity (TAc) and malic acid (Mal) were positively correlated to soil total nitrogen (N), exchangeable potassium (K), and organic carbon (OC), whereas tartaric acid (Tar) was negatively related with soil exchangeable calcium (Ca), pH and carbonates (CaCO3). Statistical analysis revealed that the mean weight of cluster and berry did not change during the investigated period, as well as the structure of relationships between soil and grape variables was highly comparable and consistent from one year to another. Contrastingly, the values of grape compositional compounds, as TAc, Mal, tartaric acid (Tar), soluble solids (Brix) and grape pH (GpH) varied significantly from 2002 to 2003 vintage. Results showed that soil and climate independently affect quantitative and qualitative grape features, respectively
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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