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Alpine structure and deformation chronology at the Southern Alps - Po plain border in Lombardy
No full textA review of the structural grain of Southern Alps in Lombardy is here integrated with new subsurface data, in order to contribute to detailed reconstruction of the chronology of Alpine deformation of the South Alpine chain and foreland. According to the recent structural schemes, we firstly describe the northern structural zones of the mountain belt. From N to S these are: the Orobian Thrust, involving Variscan basement and Permian sedimentary cover; the Orobian Anticlines, which include basement to lower Mesozoic units (DE SITTER & DE SITTER KOOMANS, 1949); the Carbonate Allochthonous Units, forming a stack of imbricated thrusts of Mesozoic formations (GAETANI & JADOUL, 1979); the Flessura Pedemontana (DESIO, 1929), which involves the South Alpine succession up to the Cretaceous formations in an out of sequence, thrust-related fold belt of late Neoalpine age; the Structures of the South Alpine border (BERSEZIO et alii, 2001), which represent the southernmost marginal belt of faulted folds involving mostly the Cretaceous Lombardian Flysch. Secondly we describe three structural belts, which can be recognised at the buried front of Southern Alps and in the Po Plain foreland area: the Imbricate Tertiary Units BERSEZIO et alii, 2001), which involve the Mesozoic and Tertiary successions, the former underlying at great depth the stack of imbricated Tertiary clastic wedges; the Structures of the Central Lombardy plain (BERSEZIO et alii, 2001), a belt of regional folds due to propagation of deep fault planes ramping up from the metamorphic basement of the Po Plain; the Southernmost Po Plain Structures, which are represented by gentle folds affecting the Tertiary clastic wedges at the southern tip of the South Alpine thrusts. Analysis of deformation chronology has allowed us to identify the structures predating the Adamello magmatic intrusion (older than 42 Ma), both in the mountain chain (Orobic thrust) and in the foreland (inversion structures of the Lacchiarella and Villafortuna- Trecate areas), where Pre-Adamello foreland deformation is represented by gentle inversion of the pre-Cretaceous extensional basins. Post-Adamello (Neoalpine) deformation is responsible for foreland propagation of the thrust belt, with formation of the Imbricate Tertiary Units, which are kinematically linked with the Structures of the South Alpine border. Their deformation lasted until the Tortonian, as documented by preservation of Tortonian sediments in the footwall of the most external South Alpine thrusts. Neoalpine strong inversion of the Mesozoic basins occurred in the southernmost Po plain foreland. In the most external foreland area of the western Southern Alps (Piedmont-Lombardy area), Neoalpine compression came to an end after deposition of the Lower Messinian units and reasonably before the Pliocene. However, east of the Giudicarie line, South Alpine deformation lasted until the Pleistocene
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
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
Foglio 057 Malonno della Carta Geologica d’Italia alla scala 1:50.000 e note illustrative
No full textFoglio 057 Malonno. Note illustrative della Carta Geologica d'Italia alla scala 1:50.000
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