1,720,961 research outputs found
Caratterizzazione petrografica e provenienza dei materiali del pavimento con emblema a cubi prospetti dalle "Logge" di Populonia
No full textAncient surface treatments of the historical architecture: methodological data comparison from different study cases
No full textThe work focuses on a comparison of petrographic-compositional data between the treatments of some ancient monuments of Tuscany and Sardinia. The purpose is to analyse the differences of surface finishes of various stones and bricks. In fact, the surface finishes can have an original aesthetical and protective function, but they can represent also subsequent treatments to adapt the surface to the color of the surrounding areas after substitutions or other local interventions. Therefore, it is important to know the type of surface treatment not only for historical-cultural reasons but also to make a more suitable choice of the possibility of remove it. In the surface samples of Tuscany (i.e., Siena Cathedral and Town Hall) and Sardinia (i.e., S. Antioco of Bisarcio and San Geminiano churches) the petrographic analysis, together XRD analyses, of the microsamples revealed the presence of Ca-oxalate which may have originated from organic substances used as binder or finishing
L’enigma del mattone graffiato. Il contributo degli studi mineralogico-petrografici
No full textIl ritrovamento di antichi trattamenti, pigmentati o trasparenti, costituiti da un
legante organico col tempo trasformato in ossalato di calcio, consentono di inserire
la graffiatura dei laterizi tra le tecniche di finitura per murature a facciavista. Il
contributo prende in esame una decina di casi di studio di edifici del centro storico di
Siena databili tra il XII e il XIV secolo
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
Materiali, colori e trasparenze nell’architettura senese a facciavista (XII - primi XVI secolo)
No full textThe mineralogical-petrographic studies carried out over the last few decades concerning the facades of the historic centre of Siena have led to an outstanding growth of knowledge on the colors and the exposed finishing techniques adopted between the end of the 12th and early 16th centuries. A complex and fascinating picture emerges that goes beyond the simple dichotomy between plaster and rough masonry. In general, the natural color of the building materials was not hidden but corrected in its irregularities and enhanced by pigmented or transparent treatments which accentuated and directed its tone. The results achieved allow some overall assessments, with significant repercussions on both the historical and the conservation perspectives
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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