1,721,049 research outputs found
Problematiche relative all’analisi mesostrutturale di conglomerati neogenici provenienti da depositi dell’avanfossa, epiliguri e neoautoctoni (Appennino marchigiano-romagnolo).
No full textA mesostructural analysis has been carried out on pebble-cobble surfaces belonging to various formations (Upper Tortonian-Early Pliocene) cropping out between the Savio, Marecchia and Foglia rivers (northern Apennines). The conglomerates occur at different structural levels: 1) in units belonging to the Umbro-Marche-Romagna Sequence, both underlying and overlying the allochthonous deposits of the Val marecchia thrust sheet, 2) in units belonging to the epi-Ligurian Sequence. The analysis of pitted and striated pebbles and cobbles, mesoscopic faults and fractures show evidences of three episodes of tectonic deformations. The first one, characterized by a NE-SW trending subhorizontal extension, is of Messinian age. This extensional episode could be related to the slowing in the outward migration rate of the Apennine deformational front during the late Tortonian-Messinian. The other episodes of deformations, of early Pliocene-Pleistocene age, are characterized by a main subhorizontal shortening direction trending NE-SW, the older one, and NW-SE, the younger one. The episode characterized by the NE-SW shortening direction is probably related to the main tectonic stress field acting in the Northern Apennines during the Neogene. The NW-SE shortening direction is more difficult to explain. It was detected in other sectors of the chain, where was linked to the tectonic activity of local trasverse structural elements. Indeed in the studied area there are transverse (transfer faults) structures that could be linked to this shortening direction. Another hypothesis is that the NW-SE shortening direction can be related to the sinistral transpressive stress field acting in the Northern Apennines during the Pleistocene
The KDEL receptor: New functions for an old protein
No full textThe KDEL receptor is a seven-transmembrane-domain protein that was first described about 20 years ago. Its well-known function is to retrotransport chaperones from the Golgi complex to the endoplasmic reticulum. Recent studies, however, have suggested that the KDEL receptor has additional functions. Indeed, we have demonstrated that chaperone-bound KDEL receptor triggers the activation of Src family kinases on the Golgi complex. This activity is essential in the regulation of Golgi-to-plasma membrane transport. However, the identification of different KDEL receptor interactors that are inconsistent with these established functions opens the possibility of further receptor activities
The mesoscopic structures of a strongly deformed multilayered sequence: a hypothesis of the origin of the "block-in-matrix" fabric and the layer-parallel extension shown by the Ligurian dismembered formations of the Baganza Supergroup outcropping in the Reggio Emilia and Modena Apennines. Introduction to the trip - Description of stops.
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The chaotic rocks of the Emilia Apennines: field mapping methods, examples and proposed nomenclature
No full textOrigine della struttura a “blocchi in pelite” e dell’estensione parallela alla stratificazione nelle formazioni smembrate liguri del Supergruppo del Baganza affioranti nel settore sudorientale dell’Appennino emiliano.
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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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