1,721,118 research outputs found
Agiografia marsicana tra modello martiriale e modello ascetico
No full textDel volume G. Luongo è anche prefatore e curator
Agiografia marsicana tra modello martiriale e modello ascetico
No full textDel volume G. Luongo è anche prefatore e curator
Modelling the rheology and cooling of lava flows
No full textThe rheological properties of lavas are of major importance in determìning the dynamìcs of lava flows. Such properties reflect the inherent structures of molten silicates and the fact that lava ìs a multiphase system. Below its liquidus temperature, lava behaves as a non-Newtonian fluid and is commonly described as a pseudoplastic fluid. A simpler model which is often used is the Bìngham fluid, characterized by a yìeld stress and a plastic viscosity. These rheological parameters depend on the composition of lava (basic or acidic) and are strongly temperature-dependent. Many other factors, including the presence of water, gas loss, crystal content and degree of polymerization, control the rheology of lava. Surface effects, such as surface tension, the strength of solid crust and ground erosion by melting, also influence flow morphology and dynamics. The roles of these factors are examined on the basis of existing studies. To better understand lava flow dynamics such factors must be investigated systematically, both theoretically and in the
laboratory, supported by more accurate measurements in the field
Modelling the rheology and cooling of lava flows
No full textThe rheological properties of lavas are of major importance in determìning the dynamìcs of lava flows. Such properties reflect the ìnherent structures of molten silicates and the fact that lava ìs a multiphase system. Below its liquidus temperature, lava behaves as a non-Newtonian fluid and is commonly described as a pseudoplastic fluid. A simpler model which is often used is the Bìngham tluid, characterized by a yìeld stress and a plastic viscosity. These rheological parameters depend on the composition of lava (basic or acidic) and are strongly temperature-dependent. Many other factors, including the
presence of water, gas loss, crystal content and degree of polymerization, control the rheology of lava. Surface effects, such as surface tension, the strength of solid crust and ground erosìon by melting, also influence flow morphology and dynamics. The roles of these factors are examined on the basis of existing studies. To better understand lava flow dynamics such factors must be investigated systematically, both theoretically and in the laboratory, supported by more accurate measurements in the field
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
Indici della PRIMA SERIE e della «NUOVA SERIE» (1893- 1982) degli “Studi Italiani di filologia Classica”
No full textHa curato, con G. Luongo ed E. Citernesi, l'Indice Sommario e l'Indice dei Collaboratori; ha collaborato con G. Luongo et alii alla redazione degli Indici dei luoghi antichi, Indice epigrafico e Indice lessical
The Scientific Historical Heritage in the Physics Museum of the University of Naples: A guided tour of the Collection is offered to visitors, providing the characteristics of individual instruments of historical interest
No full textVariations 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
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