1,721,020 research outputs found
On the nonlinear dynamics of spatial cellular tensegrities
No full textIt has been shown in [1] and [2] that the nonlinear mechanical response of one-dimensional assemblies of tensegrity modules is characterized by the presence of solitary waves and other nonlinear phenomena. In [3], numerical experiments carried out on two-dimensional periodic assemblies of tensegrity cells revealed that such lattices also supports the propagation of solitary waves. Here we extend that study by considering three-dimensional periodic assemblies of tensegrity cells. These cells have polyhedral shape with cables outside and bars inside, and they are assembled together by suspending one bar of a cell on the cables of an adjacent cell, so as to realize lattices characterized by a stiffening static response. We first present an exploration of the possible spatial tessellations which can be obtained in this way. Afterward, we discuss the simulated dynamic behavior of selected assemblies.
References
[1] Fraternali, F., Carpentieri, G., Amendola, A., Skelton, R.E., and Nesterenko, V.F., “Multiscale tunability of solitary wave dynamics in tensegrity metamaterials”, Applied Physics Letters, Vol. 105, 201903 (2014).
[2] Davini,C.,Micheletti,A.,andPodio-Guidugli,P.,“OntheimpulsivedynamicsofT3tensegrity chains”, Meccanica, Vol. 51(11), pp. 2763-2776 (2016).
[3] Micheletti, A., Paris, V., Pizzigoni, A., Ruscica, G. “Nonlinear cellular tensegrity materials”, presented at 23rd AIMETA Congress, Salerno, Italy, September 4-7, 201
Il luogo, le carte e le parti separate della casa
No full textQuesto capitolo è contenuto nella complessiva descrizione delle ricerca svolta a firma Motta G., Pizzigoni A., Graffione M., Stapenhorst C., Palma R., Ravagnati C, intitolata "Cartografie, infrastrutture, archetipi per un'architettura della Terra: ricerca sui criteri di qualità nella progettazione dell'Housing sociale
Progetto per la riqualificazione dell'area Oltreadda a Lodi.Pubblicato in Casabella, n. 273 (supplemento), 2004, ISSN 0008-7181.
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
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
- …
