1,721,027 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
Perioperative hemodynamic optimization : impact of respiratory and metabolic acidosis, infra-renal aortic cross clamping and prone positioning
No full textL’optimisation hémodynamique péri-opératoire est une stratégie qui vise à maximaliser le transport artériel en oxygène et/ou le volume d’éjection systolique lors de chirurgie à risque. Ce concept a beaucoup évolué lors de ces trente dernières années, vers une approche plus simple, plus réalisable en pratique clinique et moins invasive. Les principales thérapeutiques utilisées dans les différents protocoles d’optimisation hémodynamique sont le remplissage vasculaire, l’administration d’agents inotropes et de vasopresseurs. Cependant, les conséquences physiopathologiques de l’agression chirurgicale peuvent impacter grandement les modalités d’administration et l’efficacité des thérapeutiques précitées. Dans la première étude, nous avons décrit l’impact de l’acidose respiratoire et métabolique (fréquemment rencontrées lors de chirurgie majeure et/ou de coeliochirurgie) sur l’efficacité des agents α et β-adrénergiques sur le myocarde sain de rat. Dans un deuxième travail nous avons mis en évidence que le remplissage vasculaire ne pouvait pas être guidé par des indices dynamiques de précharge dépendance lors du clampage chirurgicale de l’aorte abdominale sous-rénale, dans un modèle porcin. Enfin, dans la troisième étude, nous avons montré dans un modèle clinique, que le positionnement en décubitus ventral lors d’une chirurgie du rachis entrainait des modifications majeures des interactions cardiorespiratoires et que les indices dynamiques devaient être interprétés avec prudence pour guider le remplissage vasculaire dans ce contexte. Ces études translationnelles soulignent trois situations fréquentes impactant l’efficacité et/ou les modalités d’administration des thérapeutiques nécessaires à une optimisation hémodynamique peropératoireThe aim of perioperative haemodynamic optimization is to maximize oxygen delivery and/or stroke volume during high risk surgery. This concept has evolved during the last thirty years, to a simpler, more feasible and less invasive approach. Main treatments used in different hemodynamic optimization protocols are fluid loading, inotropes and vasopressors administration. However, pathophysiological consequences of surgical stress can greatly impact the mode of administration and the efficacy of the above therapeutics. In the first study, we described the impact of respiratory and metabolic acidosis (frequently encountered during major surgery and/or laparoscopic surgery) on the effectiveness of α and β-adrenergic agents in healthy rat myocardium. In a second work, we demonstrated that intravenous fluids cannot be guided by dynamic indices of preload dependency during surgical clamping of the infrarenal abdominal aorta in a porcine model. Finally, in the third study, we demonstrated in a clinical model, that positioning in prone position during spine surgery induced major changes in cardiorespiratory interactions and dynamic indices should be interpreted with caution to guide fluid therapy in this context. These translational studies highlight three common situations impacting the effectiveness and/or administration of therapeutic necessary for intraoperative hemodynamic optimization
Perioperative hemodynamic optimization : impact of respiratory and metabolic acidosis, infra-renal aortic cross clamping and prone positioning
No full textL’optimisation hémodynamique péri-opératoire est une stratégie qui vise à maximaliser le transport artériel en oxygène et/ou le volume d’éjection systolique lors de chirurgie à risque. Ce concept a beaucoup évolué lors de ces trente dernières années, vers une approche plus simple, plus réalisable en pratique clinique et moins invasive. Les principales thérapeutiques utilisées dans les différents protocoles d’optimisation hémodynamique sont le remplissage vasculaire, l’administration d’agents inotropes et de vasopresseurs. Cependant, les conséquences physiopathologiques de l’agression chirurgicale peuvent impacter grandement les modalités d’administration et l’efficacité des thérapeutiques précitées. Dans la première étude, nous avons décrit l’impact de l’acidose respiratoire et métabolique (fréquemment rencontrées lors de chirurgie majeure et/ou de coeliochirurgie) sur l’efficacité des agents α et β-adrénergiques sur le myocarde sain de rat. Dans un deuxième travail nous avons mis en évidence que le remplissage vasculaire ne pouvait pas être guidé par des indices dynamiques de précharge dépendance lors du clampage chirurgicale de l’aorte abdominale sous-rénale, dans un modèle porcin. Enfin, dans la troisième étude, nous avons montré dans un modèle clinique, que le positionnement en décubitus ventral lors d’une chirurgie du rachis entrainait des modifications majeures des interactions cardiorespiratoires et que les indices dynamiques devaient être interprétés avec prudence pour guider le remplissage vasculaire dans ce contexte. Ces études translationnelles soulignent trois situations fréquentes impactant l’efficacité et/ou les modalités d’administration des thérapeutiques nécessaires à une optimisation hémodynamique peropératoireThe aim of perioperative haemodynamic optimization is to maximize oxygen delivery and/or stroke volume during high risk surgery. This concept has evolved during the last thirty years, to a simpler, more feasible and less invasive approach. Main treatments used in different hemodynamic optimization protocols are fluid loading, inotropes and vasopressors administration. However, pathophysiological consequences of surgical stress can greatly impact the mode of administration and the efficacy of the above therapeutics. In the first study, we described the impact of respiratory and metabolic acidosis (frequently encountered during major surgery and/or laparoscopic surgery) on the effectiveness of α and β-adrenergic agents in healthy rat myocardium. In a second work, we demonstrated that intravenous fluids cannot be guided by dynamic indices of preload dependency during surgical clamping of the infrarenal abdominal aorta in a porcine model. Finally, in the third study, we demonstrated in a clinical model, that positioning in prone position during spine surgery induced major changes in cardiorespiratory interactions and dynamic indices should be interpreted with caution to guide fluid therapy in this context. These translational studies highlight three common situations impacting the effectiveness and/or administration of therapeutic necessary for intraoperative hemodynamic optimization
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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