1,720,966 research outputs found
Dissimulation des opinions politiques sous contrôle: Le cas d’Ibn Ḥazm à Séville
Get PDFThis article tackles a difficult problem involving the biography of Ibn Ḥazm, namely the classical Arab historians have alluded to the fact that al-Mu‛taḍid, king of Seville, had persecuted Ibn Ḥazm and decreed that his books must be burnt. The same historians give no explicit nor accurate details on the political circumstances that led to this tragedy. We have studied and reconstructed the historical context of the events while taking greater advantage of some new facts discovered from our recent study on the textual history of Kitāb al-Faṣl.[fr] Les historiens arabes classiques ont fait allusion au fait qu’al-Mutaḍid, roi de Séville, avait persécuté Ibn Ḥazm et aurait condamné ses livres au feu. Ces mêmes historiens ne disaient rien d’explicite qui pourra nous renseigner avec exactitude et détails sur les circonstances politiques qui ont donné lieu à ce drame. Nous avons étudié et reconstruit le contexte historique des événements tout en tirant un plus grand profit de quelques faits nouveaux qu’avait révélés notre récente étude consacrée à l’histoire du texte de Kitāb al-Faṣl
Identificación de un manuscrito andalusí anónimo de una obra contra Ibn Ḥazm al-Qurṭubī (m. 456/1064)
Get PDFThis article presents an unpublished fragment of an Andalusí manuscript of a text criticizing Ibn Ḥazm. Identifications are offered of the title of the work and its author, as well as suggestions as to where it was composed. The text also provides valuable information about Ibn Ḥazm, his writings, his opponents and those who protected him as well as about the author of the text itself.
The historical value of the manuscript is great, but the manuscript is incomplete. It is to be hoped that this article will make it possible to discover another manuscript whose contents complement and perhaps complete those of this manuscript, in poor condition, preserved in Fez and, in microfilm, in the Bibliothèque Genèrale de Rabat.En este artículo se aborda el estudio de un fragmento manuscrito andalusí que contiene una crítica dirigida a la doctrina ẓāhirí de Ibn Ḥazm. En primer lugar, se intenta determinar el título de la obra y la identidad del autor. Posteriormente, se ofrece una estimación aproximada de la fecha y el lugar de composición del libro. Por último, se proporciona información relevante en tomo a la figura de Ibn Ḥazm, sus obras, sus adversarios, sus protectores, al igual que sobre el autor del fragmento.
El valor histórico del manuscrito es realmente considerable, por lo que aprovecho estas líneas para expresar mi deseo de que en el futuro otros investigadores puedan localizar otro ejemplar de este fragmento que, de algún modo, permita completar la información proporcionada por el deteriorado manuscrito, actualmente preservado en la Biblioteca de al-Qarawiyyīn de Fez, y cuyo microfilm se halla en la Biblioteca General de Rabat
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
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
Identificación de «al-Qurṭubī», autor de al-I‛lām bimā fī dīn al-naṣārà min al-fasād wa-l-awhām
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Calcul de champs électromagnétiques et de répartition de charges surfaciques dans des domaines quasi-singulier.
No full textFirst, we focus on solving numerically the Poisson problem with homogenous Dirichlet conditions in a three dimensional prismatic or axisymmetric domain, with a reentrant edge at the boundary. We present the Fourier Singular Complement Method based on a Fourier expansion in the direction parallel to the reentrant edge and the Singular Complement Method for solving the 2D problems in the Fourier modes. The analysis shows that we recover the optimal rate of convergence O(h) when using P 1 Lagrange finite elements for the discretization. No refinement near the reentrant edge is required in the computations. Second, we are interested in computing the charge density and the electricfield at the rounded tip of an electrode of small curvature radius. Our model problem is the electrostatic problem. For this problem, Peek's empirical formulas describe the relation between the electric field at the surface of the electrode and its curvature radius. However, they apply only to thin electrodes with either a purely cylindrical, or a purely spherical, geometrical shape. Our aim is to justify rigorously these formulas, and to extend them to more general, either two dimensional or three dimensional axisymmetric, geometries. With the help of multiscaled asymptotic expansions, we establish rigorously an explicit formula for the electric potential in geometries that coincide with a cone at infinity. We also prove a formula for the surface charge density, which is very simple to compute with the FE Method. In particular, the meshsize can be chosen independently of the curvature radius. We illustrate our mathematical results by numerical experiments.La première partie de ce mémoire est consacrée à la résolution numérique du problème de Poisson avec conditions aux limites de Dirichlet dans un domaine prismatique ou axisymétrique, possédant une arête rentrante sur sa frontière. Nous présentons la Méthode de Fourier et du Complément Singulier consistant à combiner un développement en série (de Fourier) dans la direction parallèle à l'arête et la Méthode du Complément Singulier pour les problèmes bidimensionnels associés aux modes (de Fourier). L'analyse de la MFCS conduit à une vitesse de convergence optimale en O(h) lorsqu'on utilise les éléments finis de Lagrange P1 pour la discrétisation. La méthode ne requiert aucun raffinement de maillage au voisinage de la singularité. Nous nous intéressons ensuite au calcul de la densité de charge à la pointe d'une électrode lorsque celle-ci présente un faible rayon de courbureque nous abordons par la résolution du problème électrostatique. La relation entre le rayon de courbure et le champ électrique à la surface de la pointe est décrit par la loi empirique de Peek. Toutefois, celle-ci n'est valable que pour des électrodes minces à géométrie cylindriques ou sphériques. On justifie mathématiquement cette loi et on l'étend à d'autres géométries. A l'aide des développements asymptotiques multi-échelles, on établit explicitement le comportement de la densité de charge pour des géométries coincidant avec un cône à l'infini. Enfin, nous illustrons ce comportement asymptotique par des expériences numériques réalisées en dimension deux, et en dimension trois, pour des domaines axisymétriques. Les résultats sont comparés à ceux obtenue par une méthode intégrale
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