1,721,144 research outputs found
Virtual Element Methods for plate bending problems
No full textWe discuss the application of Virtual Elements to linear plate bending problems, in the Kirchhoff-Love formulation. As we shall see, in the Virtual Element environment the treatment of the C^1-continuity condition is much easier than for traditional Finite Elements. The main difference consists in the fact that traditional Finite Elements, for every element E and for every given set of degrees of freedom, require the use of a space of polynomials (or piecewise polynomials for composite elements) for which the given set of degrees of freedom is unisolvent. For Virtual Elements instead we only need unisolvence for a space of smooth functions that contains a subset made of polynomials (whose degree determines the accuracy). As we shall see the non-polynomial part of our local spaces does not need to be known in detail, and therefore the construction of the local stiffness matrix is simple, and can be done for much more general geometries
Virtual Elements for linear elasicity problems
No full textWe discuss the application of virtual elements to linear elasticity problems, for both the compressible and the nearly incompressible case. Virtual elements are very close to mimetic finite differences (see, for linear elasticity, [L. Beira͂o da Veiga, M2AN Math. Model. Numer. Anal., 44 (2010), pp. 231--250]) and in particular to higher order mimetic finite differences. As such, they share the good features of being able to represent in an exact way certain physical properties (conservation, incompressibility, etc.) and of being applicable in very general geometries. The advantage of virtual elements is the ductility that easily allows high order accuracy and high order continuity
Emmanuel Levinas. Prophetic Inspiration and Philosophy. Atti del Convegno per il Centenario della nascita, Roma 24-27 maggio 2006
No full text
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
Anna-Teresa Tymieniecka. La trama vivente dell'essere.
No full textIl pensiero di A.-T. Tymieniecka è un pensiero tuttora in fieri, nonostante diverse opere a carattere sistematico siano state pubblicate, come i 4 volumi della serie Logos and Life e i due più recenti della nuova serie The Fullness of the Logos in the Key of Life. Alcuni tratti senbrano comunque bn consolidati: per esempio l'uso del metodo intuitivo che, se non oscura il concomitante procedere argomentativo, spesso lo sommerge con una piena di immagini che tanto più si susseguono quanto più si battono terreni inesplorati dalla fenomenologia classica. Movenza tipica di questo pensiero è il procedere essenziale e diretto da un'intuizione all'altra, con un linguaggio ordinario in cui spiccano licenze poetiche significative.Lo sviluppo teoretico segue intuizioni concettuali che ci spingono a forzare le fenditure e le crepe dell'ovvio del sapere filosofico, scientifico e quotidiano per lasciar erompere e manifestare la trama vivente dell'essere con tutta la sua energia costruttiva
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
The Hitchhiker's guide to the virtual element method
No full textWe present the essential ingredients in the Virtual Element Method for a simple linear elliptic second-order problem. We emphasize its computer implementation, which will enable interested readers to readily implement the method
- …
