1,720,980 research outputs found
Scuola Estiva I materiali Lapidei: tra georisorsa e Beni Culturali
No full textDal 23/6/09 al 26/6/09 il GABeC con il patrocinio della SIMP ha organizzato una Scuola dal titolo "I materiali lapidei: tra georisorsa e beni culturali" che si è svolta a Latina presso il Polo della Facoltà d'Ingegneria dell'Università La Sapienza. Il programma prevedeva una prima parte (prime due giornate) che trattava aspetti di carattere geologico-giacimentologico della risorsa lapidea, ciclo e impieghi dei lapidei ornamentali, aspetti tecnico-legislativi e caratterizzazioni normative dal punto di vista minero-petrografico e petrofisico. Nella seconda parte (3°giorno) sono state approfondite le relazioni esistenti tra i materiali lapidei ed i beni culturali in senso lato con interventi finalizzati alla valutazione del degrado, alla mappatura e alla diagnostica dello stesso. L'ultima mattinata è stata dedicata a case histories.
I partecipanti alla Scuola avevano la possibilità di presentare posters sulle loro esperienze in tematiche inerenti agli argomenti trattati.
I riassunti dei posters, unitamente alle lezioni tenute durante la Scuola, sono stati pubblicati in un volume della collana "Georisorse e Ambiente".
Tutte le informazioni sono state diffuse attraverso il sito SIMP (simp.dst.unipi.it
The contribution of gas-phase reactions to the nitroarene fraction of molecular weight 247 present in carbon particles sampled in an urban area of Northern Italy
No full textPlatinum-Group Element Geochemistry in Chromitite and Related Rocks of the Bracco Gabbro Complex (Ligurian Ophiolites, Italy)
Full text linkChromite composition and platinum-group mineral assemblage in the Uktus Uralian-Alaskan-type complex (Central Urals, Russia)
No full textChromitite segregations in dunites of the Uktus Uralian-Alaskan-type complex (Central Urals, Russia) display large variation of the chromite composition: Cr/(Cr + Al) - 0.46-0.77, Fe2+/(Fe2+ + Mg) = 0.28-0.66, and Fe3+ /(Fe3+ + Fe2+) =0.23-0.59. Three types of PGM assemblages have been recognized, varying in accordance with chromite composition: type I, dominated by Ru-Os-Ir (sulfides), is associated with magnesiochromite having Fe3+ /(Fe3+ + Fe2+) < 0.30, in the southern dunite body. Type 11, containing abundant Pt-Ir (alloys, minor sulfides), is found in magnesiochromite with Fe3+ /(Fe3+ + Fe2+) = 0.40-0.44; type III, consisting of Ir-Rh-Pt-Pd (alloys, sulfarsenides, antimonides) in Fe-rich chromite having Fe2+ /(Fe2+ + Mg) = 0.66 and Fe3+ /(Fe3+ + Fe2+) = 0.59. Positive anomalies of Ir and Pt, and a negative peak of Ru characterize the PGE patterns of chromitites with type II and III PGM assemblages, whereas a positive Pt anomaly is observed in their dunite host. Intensive fractionation of Pt-Fe alloys in the Uktus chromitites reflects the anomalous behavior of Pt which is decoupled from Rh and Pd. Among other factors, the high iron activity and oxygen fugacity in the parent melt appear to exert a major control on precipitation of Pt-Fe alloys, below sulfur saturation. The strong Pt anomaly in chromitites from Uktus may indicate that Uralian-Alaskan-type magmas were derived from a Pt-rich mantle source
Flora e vegetazione della Pietra di Finale
No full textThe main floristic and vegetational aspects are illustrated, with particular regard to the most interesting species
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
La produzione e diffusione di sarcofagi tardoantichi in Pietra di Finale (V-VI/VII secolo).
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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