1,720,995 research outputs found
ALGORITHMIC TREATMENT OF ISOTROPIC PLASTICITY MODELS UNDER PLANE STRESS PLASTICITY MODELS.
No full textA note on the implementation of return mapping algorithms and consistent tangent operators in isotropic elastoplasticity
No full textUn approccio di tipo “boundary element free” per lo studio della torsione di travi con sezione retta poligonale
No full textA finite deformation model for the dynamic behaviour of fluid saturated porous biphasic media
No full textIn the present contribution a novel model for the description of the dynamic response of biphasic media at finite deformations is illustrated. The model is formulated by means of eight kinematic scalar fields: the displacement field of the solid phase, the velocity of the fluid, the density of fluid and an additional scalar field associated with the microscopic volumetric deformation of the solid phase.
In order to overcome the limits imposed by hypoelastic models, the present formulation is completely developed in the context of finite deformations and, in analogy with a model recently developed by Li et al., all balance equations are expressed in the reference configuration of the solid phase. Unlike the latter model, the present formulation is suitable for describing also the response of biphasic media for which the ratio between volumetric jacketed and unjacketed compressibility is different from zero, a feature shared also by Biot and Willis seminal work, while retaining distinct constitutive relations for the solid and the fluid phases.
The governing equations are derived in terms of macroscopic balance laws and the relation with other biphasic theories is discussed with particular attention to the general case of a highly compressible gas and to the limit case of a solid phase constituted by a volumetrically incompressible material
Destrutturare la classe multiculturale. La scuola tra innovazione e serendipity
No full textIl capitolo presenta una pratica di educazione interculturale virtuosa, che può essere utilizzata come esemplificazione e ricontestualizzazione situata di principi educativi orientati in senso interculturale, inclusivo e accogliente
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
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
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