1,720,959 research outputs found
A topological approach to the analysis of switching circuits
No full textThis paper describes a technique for the formulation of the constraint equations in electrical networks containing ideal switches and characterized by a time variant topology. The proposed method is suitable for semi-qualitative analysis of switching circuits (switch with zero R-ON and infinite R-OfF) where a faster simulation is preferred to a precise one to focus only the behavioral performance of the circuit to analyze. In the proposed approach a set of overall constraint equations, the "Template Equations", are written at the start of the simulation.. The constraint equations, for each topological configuration produced by the ON/OFF switches, are derived by TE on the basis of simple operations. The advantage of the proposed approach consist into the capability to represent, in a single set of equations, circuits with time variant topology
Models of piezoelectric materials for transduction and energy harvesting
No full textPiezoelectric materials are characterized by two well known different effects, the direct and the converse one. The former effect, that is the property of converting vibrations into electrical energy, is studied in the field of Energy Harvesting (EH) in order to produce not expensive and non-polluting energy by making use of natural vibrations. In the last two decades this aspect has been object of interesting research widely. The latter effect consists of producing strain on a material subjected to electrical polarization. For this reason it can be exploited to design piezoelectric transducers. In this chapter it is shown that both the above mentioned situations can be analyzed basing on the piezoelectric constitutive equations, proposed by IEEE Standard on Piezoelectricity. The study is carried out by characterizing the constitutive matrices for the piezoelectric material in testing and implementing the equations of the mathematical model by a software that uses the Finite Element Method (FEM). This model allows to choose the fitting piezoelectric material in each of the previous situation and its best geometrical and physical properties like length, width, height, weight, position. In the last paragraph a nondestructive diagnosis is performed by the simulations of a device for ultrasonic probes and a thin structure useful for Energy Harvesting is presented
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
Swarm Intelligence for Electric and Electronic Engineering
No full textWith growing developments in artificial intelligence and focus on swarm behaviors; algorithms have been utilized in solving a variety of problems in the field of engineering. This approach has been specifically suited to face the challenges in electric and electronic engineering. Swarm Intelligence for Electric and Electronic Engineering provides an exchange of knowledge on the advances, discoveries, and improvements of swarm intelligence in electric and electronic engineering. This comprehensive collection aims to bring together new swarm-based algorithms as well as approaches to complex problems and various real-world application
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
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