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Uno sguardo sulla città romana di Ocriculum (Umbria, Italy)
No full textOtricoli è un centro abitato nel sud dell’Umbria, situato in un territorio limitato ad est dai rilievi della catena appenninica e ad ovest dal ”fiume di Roma”, il Tevere. Arroccato su una rupe, domina dall’alto le vestigia di quella che fu, in epoca romana, Otricoli “apud Tiberim” (al Tevere) nota come Ocriculum.Ocriculum sorse e si sviluppò in età augustea, tra il I sec. a.C. e il II sec. d.C, in una zona pianeggiante e degradante verso il Tevere e divenne presto un fiorente centro commerciale. La città crebbe difesa naturalmente da due contrafforti in tufo, sopra e a ridosso dei quali furono costruiti importanti edifici e ville patrizie.Nell’area affiora una successione sedimentaria del Pliocene sup.-Pleistocene inf., medio di ambiente marino passante ad ambiente fluviale e una copertura, variamente estesa, di rocce piroclastiche del Pleistocene medio prodotte dal vulcano di Vico. Tra la fine del VI e il VII sec. d.C. l’azione sinergica di fattori naturali e antropici (caratteristiche litologiche e morfologiche, deterioramento climatico e situazione di degrado conseguente alla crisi dell’Impero Romano) costrinse gli abitanti ad abbandonare l’antica città di Ocriculum
The Past and the present of the Roman town of Ocriculum
No full textOtricoli is a village located in the south of the Umbria Region (Central Italy). It is perched in a territory limited on the eastern side by the Apennines chain and the west by the Tiber River. From the top of a hill Otricoli dominates the ruins of the Roman village of Ocriculum.Ocriculum was founded in the 1st Century B.C. and developed during the 2nd Century A.D. It was placed in a flatten area declining towards the Tiber River and soon it became a prosperous commercial centre.Marine sediments of the Late Pliocene-Early Pleistocene and fluvial sediments of the Early-Middle Pleistocene covered by Middle-Late Pleistocene pyroclastic rocks cropping out in the area.Natural factors and human activities caused Ocriculum’s deterioration that forced the inhabitants to abandon the town in the period between the end of the 6th and 7th Centuries A.D., during the climatic minimum of the Early Middle Ages. The cold, wet climatic conditions certainly facilitated the decline of the territory, already worsened by the consequences of the fall of the Roman Empire
Policromia in Umbria. Testimonianze nelle necropoli di Casaglia e di Strozzacapponi a Perugia
No full textL'ipogeo dei Volumni. 170 anni dalla scoperta. I documenti
No full textresponsabile scientifico del progetto di allestimento e ordinamento della mostr
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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