1,721,078 research outputs found
Ricerche speleosismologiche nel massiccio del Pollino, Appennino Meridionale. Atti I Convegno Regionale di Speleologia
No full textMiddle Pleistocene to Holocene tectonics of the Sannio-Matese Mts. boundary: Geometry, kinematics and fault activity
No full textA multidisciplinary study along the north-eastern and western borders of the Matese and Sannio Mts., respectively, has been devoted to decipher the Quaternary to Recent deformation of this sector of the Apenninic chain (MASCHIO, 2003). The mesostructural and geomorphologic analysis, supported by data from low-magnitude seismic sequences (MILANO et alii, 1999; VILARDO et alii, 2003) has allowed to: (1) map the distribution of Middle Pleistocene-Holocene normal fault systems; (2) assess geometry, kinematics and timing of deformation of the fault systems; (3) estimate averaged slip rates for the main tectonic structures, based on offsets of geomorphologic markers; (4) compare the fault kinematic and seismotectonic frame, (5) suggest a geometric model of the active deformation for this sector of the Apenninic chain, that helps clarify the relationships between exposed faults, historical and instrumental seismicity, and seismicity of boundary segments. In detail, the investigated fault systems present an articulated geometry and a complex kinematics in respect to the NE-SW direction of extension typically observed in the Southern Apennines. The tectonic control of inherited structures on active faulting plays a key role on the geometric arrangement of the arrays, formed by N-S and E-W segments which link each other to NW-SE striking, young deformation zones. Quaternary to Recent deformation appears to be accommodated by slip partitioning both on sub parallel structures and on variously striking but kinematically coordinated faults, active within a non-plane strain environment. The fact that slip is heterogeneously distributed in space is consistent with the focal mechanisms of the 1997-1998 low magnitude seismic sequences (MILANO et alii, 2001; VILARDO et alii, 2003). Inspection of the spatial distribution and differential elevation of remnants of sub-horizontal erosional and/or depositional surfaces, referred to various morphological events, has documented a migration of faulting during the Middle/Upper Pleistocene-Holocene and permitted to estimate vertical slip-rates for most of the segments of the fault systems. The main results are listed as follows: - a NE-dipping fault array in the Matese Mts. is active after 2 Ma (from Sassinoro to Guardiaregia to Roccamandolfi villages) and has a cumulate slip rate up to 0.31 mm/a; - most of the main fault systems of the northern border of the Matese Mts. and of the main antithetic ones of the southern border of the Montagnola di Frosolone are active after 0.7 Ma and have integrated slip rates up to 1.37 mm/a and to 0.33 mm/a, respectively; - range-bounding faults of the Matese and Sannio Mts., together with the N-S oriented Le Piane fault (DI BUCCI et alii, 2002), are active mostly after 0,12 Ma with cumulated slip rate of 1,0 mm/a. We suggest these fault systems are representative of an articulated, NE-dipping seismogenic structure, which is internally constituted of both E-W oriented inherited faults linking major NW-SE younger faults, and has NNW-SSE striking faults at its terminations (i.e. Le Piane and Castelpizzuto faults, towards north and Sassinoro, Collalto and Pescosardo faults, towards south). The cumulate slip rate estimates highlights that most of the strain accumulation is concentrated in the middle of the seismogenic structure, from Sepino-Guardiaregia to Castelpizzuto villages. Slip on the structure boundary can occur both during large earthquakes and low-energy seismic sequences
Tettonica medio pleistocenico-olocenica al confine tra i Monti del Matese e del Sannio: implicazioni sulla geometria della fagliazione attiva.
No full textActive extension in Val d'Agri area, Southern Apennines, Italy: implications for the geometry of the seismogenic belt.
No full textField trip guide to active tectonics studies in the high Agry Valley (In the 150th anniversary of the 16 December 1857, Mw 7.0 Earthquake).
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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
New insights on some structural geometries in Southern Apennines by multiscale analysis of potential fields
No full textWe interpreted selected profiles of the Gravity Bouguer anomalies in Southern Apennines by a two-step procedure. First, a high resolution boundary analysis is performed by using the MDA technique, based on the Enhanced Horizontal Derivative function (Fedi and Florio 2001). This analysis applied to Southern Italy Bouguer gravity map gave detailed information on the shallow and deep structural setting. The second step is the interpretation, by DEXP method, of the gravity field linked to a EHD lineament of interest. With Depth from Extreme Points method we can retrieve a rather effective information about the sources, namely their horizontal boundaries, depth and structural index
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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