1,720,974 research outputs found
Structral analysis of the Albidona Formation in Alessandra del Carretto-Plataci area (Calabro-Lucanian Apennines, Southern Italy)
No full textThe Albidona Formation, one of the uppermost formations of
the Cilento Unit (Langhian-Early Tortonian), crops out at the border
between Calabria and Lucania (Southern Apennines, Italy). In the
studied area, located between the villages of Alessandria del Carretto
and Plataci, the Formation lies unconformably on different basinal
terrains represented by the Crete Nere, the Saraceno, and the Sicilide
Units.
Lithologically, the formation shows turbiditic arenaceous-pelitic
facies which evolve upwards to conglomeratic-arenaceous ones. At
different levels of the series, slumping, conglomeratic-arenaceous
and calcareous-marly megaturbidites, as well as synsedimentary
faults are found, which suggest significant synsedimentary tectonic
phenomena. The thickness of the entire succession cropping out in
this area is about 1200 m.
This turbiditic succession represents the infilling of thrust-top
or foredeep basins which developed on the frontal part of the accretionary
wedge of the Apenninic Chain during its Middle-Late Miocene
northeastwards migration.
Detailed field mapping and structural analysis carried out on
the Albidona Formation shows a polyphase deformation history with
at least two main contractional deformation sequences (D1 and D2).
The former is characterized by two coaxial compressive episodes
(D1a and D1b) that produced the main shortening recognized in this
area. The first episode (D1a) formed recumbent to moderately inclined
NE-vergent folds, while the second (D1b) determined coaxial
refolding of earlier structures. The latest deformation event (D2)
produced NE-SW trending upright gentle folds. The superposition of
folding events D1b and D2 produces a gentle dome and basin interference
pattern on top of the gently dipping D1a fold limbs.
Nevertheless, the main regional structure observed in the Albidona
Formation consists of a moderately inclined to recumbent NEvergent
macrofold running for about 10 km along the strike from the
village of Plataci to Timpone della Niviera
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
Geomorphological map of the central sector of the Matese Mountains (Southern Italy): an example of complex landscape evolution in a Mediterranean mountain environment
Full text linkVariations 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Segmentation pattern and structural complexities in seismogenic extensional settings: The North Matese Fault System (Central Italy)
No full textWe investigated the northern slope of the Matese Mts. (Molise, Central Italy) with the aim of characterizing the N- to NE-dipping active normal fault system in the Bojano basin, a sector of primary importance from a seismic hazard perspective. We collected field data to define the geometry and segmentation pattern of two sub-systems (Patalecchia-Colle di Mezzo and Bojano–Campochiaro). New evidence of late Quaternary faulting was obtained by exploiting well log interpretations. Kinematic analysis revealed the interaction of pre-Quaternary inherited (mainly E-W-striking) and newly formed (NW-SE-striking) normal faults. Slip accommodation through linkage was clearly noted in the case of the Patalecchia-Colle di Mezzo sub-system. Detailed topographic profiles across the active fault segments provided post-LGM (15 ± 3 kyr) slip rates up to ∼2 mm/yr which agree with the high deformation rates based on different approaches in the literature. Finally, the instrumental seismicity analysis constrained the bottom of the seismogenic layer to depths of 13–14 km, and the gathered information allowed us to reconstruct the North Matese seismogenic source. Its 3D geometry and dimensions agree with both the dimension-magnitude relationships and macroseismic information available for the 1805 earthquake (Mw 6.6), the main historical earthquake to have struck the Bojano basin
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