1,721,112 research outputs found
The decadence of the sambucina abbey (Calabria, Southern Italy): Geological and historical hints
No full textAn integrated geological and historical approach has been adopted to understand the suite of natural events which led to the progressive disruption of the Cistercian Sambucina Abbey (Luzzi, Crati Valley, Calabria) since its early foundation in the 12 th century. The Abbey relics lay on the eastern shoulder of the Crati Graben, on the crystalline-metamorphic domains of the Palaeozoic rocks of the SiIa Massif. By means of both aerial photo interpretation and field survey, a multiple roto-translational slide affecting a large sector of the Sambucina slope has been recognized. In the same area, several shallow landslides concur in aggravating the instability of the Abbey area. Historical documents collected in libraries and archives suggest that the primitive core of the Abbey, destroyed by the 1184 earthquake, was soon rebuilt by the Cistercians following the monumental building rules of their order. Around 1220, the Abbey was again hit by a local earthquake and by a coseismic landslide, which caused the temporary abandonment of the site. Finally, in 1569, a catastrophic landslide completely destroyed the abbatial complex, which was thus abandoned for a long time. On the basis of the historical accounts of this disaster, of the archaeological evidence in the Abbey relics, and of the geomorphological evidence, the geological model of the landslide has been reconstructed
The macroseismic intensity distribution of the 30 October 2016 earthquake in central Italy (Mw6.6). Seismotectonic implications
No full textThe central Italy Apennines were rocket in 2016 by the strongest earthquakes of the past 35years. Two main shocks (M-w 6.2 and M-w 6.6) between the end of August and October caused the death of almost 300 people, and the destruction of 50 villages and small towns scattered along 40km in the hanging wall of the N165 degrees striking Mount Vettore fault system, that is, the structure responsible for the earthquakes. The 24 August southern earthquake, besides causing all the casualties, razed to the ground the small medieval town of Amatrice and dozens of hamlets around it. The 30 October main shock crushed definitely all the villages of the whole epicentral area (up to 11 intensity degree), extending northward the level of destruction and inducing heavy damage even to the 30km far Camerino town. The survey of the macroseismic effects started the same day of the first main shock and continued during the whole seismic sequence, even during and after the strong earthquakes at the end of October, allowing the definition of a detailed picture of the damage distribution, day by day. Here we present the results of the final survey in terms of Mercalli-Cancani-Sieberg intensity, which account for the cumulative effects of the whole 2016 sequence (465 intensity data points, besides 435 related to the 24 August and 54 to the 26 October events, respectively). The distribution of the highest intensity data points evidenced the lack of any possible overlap between the 2016 earthquakes and the strongest earthquakes of the region, making this sequence a unique case in the seismic history of Italy. In turn, the cross matching with published paleoseismic data provided some interesting insights concerning the seismogenic behavior of the Mount Vettore fault in comparison with other active normal faults of the region
Low slip rates and multimillennial return times for M<inf>w</inf> 7 earthquake faults in southern Calabria (Italy)
No full textThe Calabrian Arc is the epicentral region of one third of the strongest earthquakes of Italy
(Mw ≥ 7.0). These are confined within a narrow peninsula which is the emerging portion of a slab-related
accretionary wedge, and all occurred in the past four centuries. Therefore, here more than anywhere in Italy,
historical seismicity alone is not sufficient for seismic hazard assessment. We carried out geological and
paleoseismological studies in southern Calabria that allowed characterizing the seismogenic behavior of the
Cittanova fault which was responsible for one of the most catastrophic earthquakes to ever occur in Europe,
the Mw 7.0 5 February 1783 event. We have found out conclusive evidence for four Holocene earthquakes
prior to 1783, with a recurrence time longer (~3.2 kyr) than the other Apennine faults (0.3–2.4 kyr). We have
also estimated a robust slip rate for the late Upper Pleistocene (0.6 mm/yr) and an extension rate (0.4 mm/yr)
that could reflect the residual back-arc opening of the Tyrrhenian Basin
New data on the Late Pleistocene activity, paleoseismology, and seismogenic behavior of the Cittanova fault (southern Calabria)
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
Tephrochronology. A continuously enhancing investigation tool of the active tectonic in Peninsular Italy
No full textHeterologous anti-lymphocyte serum hastens the growth of the 7,12-dimethylbenz(a) antracene induced tumours in mice
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
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
- …
