1,720,993 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
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
Paleoenvironmental changes, mammal complexes, and humans in Italy throughout the Pleistocene
No full textIn recent years, there has been growing evidence suggesting that hu- mans entered the Mediterranean perimeter of Europe earlier than 1 Ma. As far as the Italian peninsula is concerned, it appears now probable that around 1.5 Ma there were already sporadic human settle- ments, followed by scattered evidence until the Early to Middle Pleistocene transition. A more stable occupation probably occurred around 600 ka, after the beginning of the Middle Pleistocene. This scenario is consistent with the scanty fossil record currently available, combined with the evidence provided by artifacts of Mode 1 and 2 technologies. Presumably, the first dispersal of human groups into the middle latitudes of Eurasia was part of the progressive faunal renewal that involved a few large mammals during the Early Pleistocene, whereas a more numerous human presence is probably related to the main faunal renewal that characterised the Early to Middle Pleistocene transition, during which time important changes affected the Earth’s climatic system. In fact, the most remarkable climatic fluctuations of the entire Cenozoic occurred during the last 800 ka, when climate was controlled by less frequent but more intense glacial-Interglacial cycles. Glacial phenomena intensified, temperature and moisture dropped no- tably, several exotic tree taxa became progressively extinct, and were prevented from becoming re-established by unsuitable climate condi- tions. These changes spurred shifts in environmental conditions and constrained the geographical diffusion of a number of taxa, allowing migration waves that drove the reorganisation of large mammal com- munities. In Italy, the faunas found at the transition from Early to Mid- dle Pleistocene represent a major reorganisation in large mammal complexes. This reorganisation occurred in successive phases during paleoenvironmental changes coinciding with the onset of the 100 ka climate cyclicity and consequent vegetation changes
THE MIDDLE PLEISTOCENE FOSSILIFEROUS SEQUENCE OF GROTTA DEI FIORI (SARDINIA, ITALY): MULTIDISCIPLINARY ANALYSIS
No full textABSTRACT - A multidisciplinary methodological approach (palaeontological, sedimentological and stable isotope analyses) was performed to analyse the fossiliferous sequence exposed in the “Grotta dei Fiori” cave (South Western Sardinia, Italy), where several small mammal remains (Microtus (Tyrrhenicola) henseli, Rhagamys orthodon, “Nesiotites” similis and Prolagus sardus) were discovered together with scanty remains of the endemic canid Cynotherium, and birds. Morphology and morphometry of first lower molars (M1) of Microtus (Tyrrhenicola)henseli from Grotta dei Fiori show that primitive and advanced morphotypes are present in each fossiliferous level. The relative frequency of morphotypes indicates that the population from “Grotta dei Fiori” might be regarded as more advanced than Microtus (Tyrrhenicola) sondaari from Xg3 fissure of Monte Tuttavista (Eastern Sardinia, late Early Pleistocene) and more primitive than the most of ?Middle and Late Pleistocene populations of Microtus (Tyrrhenicola) henseli from Sardinia. All in all, the data thus far provided by sedimentology and geochemistry indicate that the fossiliferous sequence of “Grotta dei Fiori” was deposited under climatic conditions characterized by an alternation of wet and dry periods. Taking into account the evolutionary degree of voles, 13C/12C and 16O/18O ratio and micromorphology of sediments, the hypothesis that the “Grotta dei Fiori” succession would be not older than the marine isotope stage (MIS) 11 cannot be ruled out. The results obtained stress once more the difficulty of a precise chronologic setting for deposits filling caves when no absolute date is available, and highlight the usefulness of a multidisciplinary approach to define environmental context and, perhaps, constrain chronology
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