1,721,009 research outputs found
Esperienza e giudizio: Giuseppe Zamboni e August Messer
No full textIl contributo mette in luce i legami tra la gnoseologia pura di Giuseppe Zamboni e il pensiero di August Messer, allievo di Oswal Külpe, ed evidenzia così un anello di congiunzione con il movimento fenomenologia europeo
Petrophysical inversion of AVA data
No full textWe investigate the interactions between the elastic parameters, Vp, Vs and density, estimated by non linear inversion of AVA data and the petrophysical parameters, depth (pressure), porosity, clay content and fluid saturation, of an actual gas-bearing reservoir. In particular, we study how the ambiguous solutions derived from the non-uniqueness of the seismic inversion affect the estimates of relevant rock properties. It turns out that the physically admissible values of the rock properties greatly reduce the range of possible seismic solutions and this range neatly encloses the actual values given by the well.
Then, by means of a statistical inversion, we analyse how an approximate a-priori knowledge of the petrophysical properties and of their relations with the seismic parameters can be of help in reducing the ambiguity of the inversion solutions and eventually in estimating the petrophysical properties of the specific target reservoir.
This statistical inversion allows the determination of the most likely values of the sought rock properties along with their uncertainty ranges. It results that the porosity is the best resolved rock property, with its most likely value closely approaching the actual value found by the well, even when we insert a somewhat erroneous a-priori information. The hydrocarbon saturation is the second best resolved parameter, but its most likely value does not match the well data. The depth of the target interface is the least resolved parameter and its most likely value is strongly dependent on a-priori information.
Although no general conclusions can be drawn from the results of this exercise, we envisage that the proposed AVA-petrophysical inversion and its possible extensions may be of use for reservoir characterisation
Maestri del pensiero: Giuseppe Zamboni e Giovanni Giulietti
No full textIl presente contributo vuole chiarire il significato dell’espressione “maestri del pensiero”, in riferimento alle figure di Giuseppe Zamboni e Giovanni Giulietti, mostrando il valore teoretico ed etico della loro indagine filosofica, da entrambi vissuta come ricerca spregiudicata, rigorosa e autentico porsi in ascolto dell’esperienza integralmente intesa.The present paper aims to clarify the meaning of the expression “masters of thought”, with regard to Giuseppe Zamboni and Giovanni Giulietti, highlighting the value, both theoretical and ethical, of their philosophical inquiry, which they interpreted as an unprejudiced, rigorous investigation and authentic listening to the whole experience
Reseña Bibliográfica: Zamboni, E.; Sabino Días, M. & Finocchio, S. (Orgs.) (2014): PEABIRU. Um caminho, muitas trilhas. Ensino de História e Cultura Contemporãnea. Florianópolis: Letras Contemporãneas, 199 pp.
No full textReseña Bibliográfica: Zamboni, E.; Sabino Días, M. & Finocchio, S. (Orgs.) (2014): PEABIRU. Um caminho, muitas trilhas. Ensino de História e Cultura Contemporãnea. Florianópolis: Letras Contemporãneas, 199 pp.</jats:p
Interactions between ambiguities from AVO inversion and petrophysical relations – An exercise
No full textGoing 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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