1,720,982 research outputs found
Dynamics and dissipation in 2D fluid foams: The foamy continuum model
No full textThe paper establishes the governing equations of the dynamics of a foamy continuum, in the sense of Davini and Podio-Guidugli, which is expected to mimic the behavior of a monodisperse fluid foam. We model this special continuum as a dissipative ordered fluid, following the lead by Sonnet and Virga. Attention to both regular and topological transformations is taken
Linear models for composite thin-walled beams by Γ–convergence. Part II: closed cross-sections
No full textAn atomistic-based Föppl–von Kármán model for graphene
No full textWe deduce a non-linear continuum model of graphene for the case of finite out-of-plane displacements and small in-plane deformations. On assuming that the lattice interactions are governed by the Brenner's REBO potential of 2nd generation and that self-stress is present, we introduce discrete strain measures accounting for up-to-the-third neighbor interactions. The continuum limit turns out to depend on an average (macroscopic) displacement field and a relative shift displacement of the two Bravais lattices that give rise to the hexagonal periodicity. On minimizing the energy with respect to the shift variable, we formally determine a continuum model of Föppl–von Kármán type, whose constitutive coefficients are given in terms of the atomistic interactions
Linear models for composite thin-walled beams by Gamma–convergence. Part I: open cross-sections
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
On the impulsive dynamics of T3 tensegrity chains
No full textTaking the cue from two recent papers,
Fraternali et al. (J Mech Phys Solids 60:1137–1144,
2012), and Fraternali et al. (Appl Phys Lett 105:201903,
2014), we sample numerically the impulsive dynamics
of chains consisting of T3 tensegrity modules. We
concentrate on illustrating the effects of the kinetic
coupling between axial strain and twist, a distinguishing
feature of T3 modules that was switched off in the cited
papers; in addition, we demonstrate by examples that
another feature of T3 modules, their ‘handedness’,
induces certain peculiar behaviors in chains made of
both left-handed and right-handed modules. In our
study, we consider a number of T3 chains, different in
composition and subject to various end conditions
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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