1,720,975 research outputs found
Giacomo Gradenigo, Joseph Eckel and coin finds: the coinage of Issa, Pharos, Corcyra Melania, Pale, and the so called Pegasi
Full text linkThe correspondence exchanged between Giacomo Gradenigo (1721-1796) and Joseph Eckhel (1737-1798) is of great numismatic interest. Thanks to evidence of coin finds communicated by his correspondent, Eckhel was able to provide a more reliable mint attribution for some Greek coin issues in the general reference work Doctrina numorum veterum (1792-1798). This paper highlights Gradenigoʼs contribution towards the classification of coins struck by the Greek cities of Issa, Pharos and Corcyra Melaina in central Dalmatia, as well as issues minted in Pale, Cephallenia. It also addresses the interpretation of Corinthian and Corinthian-style staters, casting light on the study of ancient coin finds at the end of the 18th century in general. An appendix presents three coins sent by Gradenigo to Vienna as gifts in 1776 and 1778
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
Symplectic Quantization II: Dynamics of Space–Time Quantum Fluctuations and the Cosmological Constant
No full textThe symplectic quantization scheme proposed for matter scalar fields in the companion paper (Gradenigo and Livi, arXiv:2101.02125, 2021) is generalized here to the case of space-time quantum fluctuations. That is, we present a new formalism to frame the quantum gravity problem. Inspired by the stochastic quantization approach to gravity, symplectic quantization considers an explicit dependence of the metric tensor g_{mu,nu} on an additional time variable, named intrinsic time at variance with the coordinate time of relativity, from which it is different. The physical meaning of intrinsic time, which is truly a parameter and not a coordinate, is to label the sequence of g_{mu,nu} quantum fluctuations at a given point of the four-dimensional spacetime continuum. For this reason symplectic quantization necessarily incorporates a new degree of freedom, the derivative g_{mu,nu} of the metric field with respect to intrinsic time, corresponding to the conjugated momentum pi_{mu,nu}. Our proposal is to describe the quantum fluctuations of gravity by means of a symplectic dynamics generated by a generalized action functional A[g_{mu,nu}, pi_{mu,nu}] = K[g_{mu,nu}, pi_{mu,nu}] - S[g_{mu,nu}], playing formally the role of a Hamilton function, where S[g_{mu,nu}] is the standard Einstein-Hilbert action while K[g_{mu,nu}, pi_{mu,nu}] is a new term including the kinetic degrees of freedom of the field. Such an action allows us to define an ensemble for the quantum fluctuations of g_{mu,nu} analogous to the microcanonical one in statistical mechanics, with the only difference that in the present case one has conservation of the generalized action A[g_{mu,nu}, pi_{mu,nu}] and not of energy. Since the Einstein-Hilbert action S[g_{mu,nu}] plays the role of a potential term in the new pseudo-Hamiltonian formalism, it can fluctuate along the symplectic action-preserving dynamics. These fluctuations are the quantum fluctuations of g_{mu,nu}. Finally, we show how the standard path-integral approach to gravity can be obtained as an approximation of the symplectic quantization approach. By doing so we explain how the integration over the conjugated momentum field pi_{mu,nu} gives rise to a cosmological constant term in the path-integral approach
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
- …
