1,721,148 research outputs found
Data revision and processing software of the CynterGlove
No full text<p>Raw data of the CynterGlove was revised and analyzed using an algorithm developed specifically for this study. It ensures the objectivity of the glove assessment based on a standardized process. The data analysis software was written in Python, utilizing the numpy and pandas libraries. Python 3.10.5 was used for developing and running the program.</p>
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
Free-boundary problem of crack dynamics: phase field modeling
No full textThis thesis describes the behavior of cracks and pores under the influence of elastic and curvature effects. In a continuum theory approach, these structure deformations are treated as free moving boundaries. Our investigation start with well established sharp interface equations for which no fully dynamical solutions exist so far. The equations include only linear dynamical elasticity, surface energy and non-equilibrium transport theory. By proper use of the phase-field concept, we are now able to tackle the fully time-dependent free moving boundary problem to describe crack propagation in a fully self-consistent way. We concentrate on two material transport processes, namely surface diffusion and phase transition dynamics. We show analytically that the intuitive and widely used approach for constructing a phase-field model for surface diffusion fails, since it does not reduce to the desired sharp interface equations, providing an uncontrolled approximation to the dynamics. We then develop two completely new models that ensure the correct asymptotic behavior and support our analytical findings by numerical simulations, which are are computationally very demanding due to the high order equations that have to be solved. We therefore derive another phase-field model based on a phase transition process. Incorporating elastodynamic effects into the theory makes the simultaneous self-consistent selection of a tip radius scale and the propagation velocity possible. Our simulations show that it describes the complicated tip behavior and the elastic far-field behavior correctly, also allowing the numerical extraction of quantities like the stress intensity factor. Our results agree with those found in the literature for the case of steadily propagating cracks and extend them into the previously unaccessible parameter regime of large elastic driving forces, Here, we are able to resolve a dynamical tip-splitting instability, in agreement with experimental observations. Structures that are subjected to external loading often contain many small cracks already, which can weaken the structure substantially, depending on the initial crack density. We performed simulations of static inclusions and compared the results with the predictions we obtained with analytic approximation schemes. The use of our scheme reveals that the complicated three-dimensional behavior of the elastic modulus as a function of the crack density for randomly oriented cracks reduces to a simple exponential decay and exhibits the inability of the often used differential homogenization method to predict percolation, i.e. breaking of the system. The parallel arrangement of slit-like cracks, where percolation does not occur, is not easily accessible to the standard analytical techniques. We could show by use of thin-plate theory, scaling arguments and numerical calculations that for this geometrical setup, the relevant effective elastic constant decays not exponentially as for randomly oriented cracks, but as a power-law instead. Our method can thus describe morphological surface instabilities, fast crack propagation and even the collective behavior of multi-cracked materials with high quantitative precision
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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