1,721,020 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
The vacuolar ATPase is required for physiological as well as pathological activation of the Notch receptor
No full textEvidence indicates that endosomal entry promotes signaling by the Notch receptor, but the mechanisms involved are not clear. Ina search for factors that regulate Notch activation in endosomes, we isolated mutants in Drosophila genes that encode subunitsof the vacuolar ATPase (V-ATPase) proton pump. Cells lacking V-ATPase function display impaired acidification of the endosomalcompartment and a correlated failure to degrade endocytic cargoes. V-ATPase mutant cells internalize Notch and accumulate it inthe lysosome, but surprisingly also show a substantial loss of both physiological and ectopic Notch activation in endosomes. VATPase activity is required in signal-receiving cells for Notch signaling downstream of ligand activation but upstream of -secretase-dependent S3 cleavage. These data indicate that V-ATPase, probably via acidification of early endosomes, promotes notonly the degradation of Notch in the lysosome but also the activation of Notch signaling in endosomes. The results also suggestthat the ionic properties of the endosomal lumen might regulate Notch cleavage, providing a rationale for physiological as wellas pathological endocytic control of Notch activity
A model of pilot study to assess the risk of exposure to surgical smokes for operating room personnel
No full textDuring the last decades the exposure to surgical smokes has been a long-standing concern both in open and laparoscopic surgery. The aim of this project is to assess the health risks for medical operating room (OR) personnel associated with surgical plumes derived from laparoscopic procedures. The purpose of this model is to check the correlation between the concentration of toxic elements derived from electrosurgical procedures in the operating setting air and the concentration of the same substances in urine and plasma of patients and operating staff. Moreover, it will be considered also the correlation between toxic concentration and time of exposure. The results of the study could be relevant to indicate if individual protection devices are efficacious to make the surgical procedure safe for patients and staff or if any adequacy has to be considered. Some unexpected difficulties delayed the expected results
Multidisciplinary development of a simulation of industrial plant disasters designed for improving safety through training and new procedures
No full textIndustrial accidents are an unfortunate reality, therefore there are just a limited number of situational training exercises to cope with the management of these kinds of emergencies. The authors propose a simulation approach for developing innovative response procedures during industrial crises integrated with start system triage model. The proposed simulator is based on an interoperable architecture using the new MS2G paradigm and it designed for being federated by IEEE 1516 HLA with other systems. The paper presents its use as test-bed on a specific case study conducting experiments over the SPIDER virtual platform developed by simulation team. In facts these experiments were based on two university classes that performed tests and training experiences on multiple target functions including mission time, detection, classification and securing of injured people. The analysis included also use of innovative procedures based on autonomous systems. The obtained results highlighted improvements on the learning curves with respect to specific target functions. These results confirm the potential of this approach as a training strategy that combines medical skills with engineering to improve reaction capabilities and situation awareness during industrial crises
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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