1,721,034 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
Structural design of a precast frame for the housing of silos
No full textIn this paper, the realization of a terminal for the storage of plastic materials, carried out by RDB for the Kt Natie Group, will be presented. The structural complex is characterized by a special reinforced concrete frame, constituted by cwed precast concrete beams which must allow the housing of aluminium silos where the plastic materials are collected. The realization and the assembling of the frame, which requires very low tolerances with respect to usual reinforced concrete strc, will be carefully described. The curved beams are desige by fllowing Eurocode 2 prescriptions, and their structural response is verified by performing non-linear finite element analyses, in which the non-linear mechanical behaviour is considered by implementing the PARC constitutive model into a fe Code. Comparisons between the theoretical (EC2) and numerical (nlfea) responses at SLS and ULS will be provided
A Poynting Vector Approach to the Study of the Steinmetz Compensator
No full textThis study explains how a Steinmetz compensator
works. Past explanations are based on phasor diagrams and do not
address the basic physical phenomena of electromagnetic energy
flow. This paper uses the Poynting vector to detect and understand
the process of compensation and restoration of symmetry in an
unbalanced system
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
Accounting measurement uncertainty in fuzzy inference
No full textFuzzy inference systems are presently employed in the presence of uncertain models, or when deterministic models are too complex to be implemented Input data to fuzzy inference systems are generally represented by crisp variables also when they represent experimental measurement results, thus disregarding measurement uncertainty. Since recent works have shown that measurement results can be effectively represented, together with their associated uncertainty, by fuzzy variables, this paper proposes a modified fuzzy inference system characterized by considering fuzzy variables as input data.</p
A fuzzy method for the identification of the sources producing harmonic pollution in the elctric network
No full textThe problem of identifying the sources injecting periodic disturbances in the electric systems is a critical point in the assessment of the electric Power Quality. The available methods, based on a deterministic approach, do not always provide correct results under the different possible operating conditions. This paper proposes an innovative method, based on a Fuzzy inference and shows significant simulation results.</p
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
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