1,720,955 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
A process based model for investigating the re-endothelialization of stented vessels
No full textopenUnderstanding the consequences and complications that arise after the implantation of a stent in a blood vessel is a complex and multidisciplinary topic.
The objective of this thesis is to simulate processes such as re-endothelialization and in-stent restenosis using models based on fluid dynamics parameters.
In the first chapter we introduce the fundamental clinical and medical aspects regarding stent implantation and its consequences.
Numerous studies have explored these phenomena through in-vivo simulations or clinical results to grasp the primary causes, while only a few have proposed virtual simulations to reproduce the occlusion process. In the second chapter, we discuss the results of these various approaches, along with their respective advantages, drawbacks, and limitations.
In the third chapter we focus on the methods used and the modeling choices taken during the simulations. Our study focuses on singular stent type, under ideal flow conditions. The basic idea is to simulate endothelial growth varying locally the dynamical viscosity profile. Firstly, we assess the progression in steady-state flow for a single stented artery. Then we proceed with unsteady flows, considering two different vessel geometries and rheological models.
In the fourth and fifth chapter we will present the results of the stationary and time dependent simulations, respectively. We focus on the changes of the main blood flow parameters and the corresponding computed neointimal growth.
At last, we will compare the results of our different simulations, considering the various regimes and geometries, and assess them with both in-vivo data and multiscale numerical simulations results found in the literature.Understanding the consequences and complications that arise after the implantation of a stent in a blood vessel is a complex and multidisciplinary topic.
The objective of this thesis is to simulate processes such as re-endothelialization and in-stent restenosis using models based on fluid dynamics parameters.
In the first chapter we introduce the fundamental clinical and medical aspects regarding stent implantation and its consequences.
Numerous studies have explored these phenomena through in-vivo simulations or clinical results to grasp the primary causes, while only a few have proposed virtual simulations to reproduce the occlusion process. In the second chapter, we discuss the results of these various approaches, along with their respective advantages, drawbacks, and limitations.
In the third chapter we focus on the methods used and the modeling choices taken during the simulations. Our study focuses on singular stent type, under ideal flow conditions. The basic idea is to simulate endothelial growth varying locally the dynamical viscosity profile. Firstly, we assess the progression in steady-state flow for a single stented artery. Then we proceed with unsteady flows, considering two different vessel geometries and rheological models.
In the fourth and fifth chapter we will present the results of the stationary and time dependent simulations, respectively. We focus on the changes of the main blood flow parameters and the corresponding computed neointimal growth.
At last, we will compare the results of our different simulations, considering the various regimes and geometries, and assess them with both in-vivo data and multiscale numerical simulations results found in the literature
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
The importance of hemodynamics in stented vessels: A conceptual model for predicting restenosis using the time-averaged shear stress
Get PDFThe role of hemodynamics has often been overlooked in mathematical modeling aimed at replicating the restenosis process in stented arteries. This study seeks to address this gap by proposing a simplified model of tissue growth driven by the distribution of mean shear stress acting on the vessel wall. Using an iterative sequence of three-dimensional Computational Fluid Dynamics simulations applied to idealized coronary and femoral arteries, combined with a semi-empirical parametrization of endothelium growth, we demonstrated that the progression of restenosis can be effectively modeled and differentiated according to the intensity of time-varying flow velocities. Notably, restenosis develops faster in the femoral artery (approximately 17 days) compared to the coronary artery (approximately 25 days). The progress of tissue accretion is well defined by the evolution of time-averaged wall shear stress. After an initial decrease (triggering phase), significant increases in wall shear stress..
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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