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Il sondaggio CARG di Ca' Borille (Casalserugo). Stratigrafia e sedimentologia della successione attraversata
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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
Palaeohydrography and early settlements in Padua (Italy)
Full text linkThis paper concerns the palaeohydrographic and geomorphological evolution of the alluvial plain around Padua during the last millennia, and the relative implications for the development of early settlements in the present urban area.
The first archaeological evidences in Padua date to the late Bronze Age (1400-–1000 BC). Since the early Iron Age (9th century BC) the settlement experienced a progressive expansion and in the 6th century BC it was already an important urban centre. In the 2nd century BC Padua became a Roman municipium, being one of the most important cities in NE Italy. Latin historians wrote that it was crossed by a large river, called the Meduacus, which was identified with the Brenta River in previous archaeological studies. The Brenta River is Latter tThis latter is becomes an important Alpine river which that now flows about 5 km NE of Padua. SAt least since the Middle Ages the Bacchiglione River, a minor course partly fed by ground-water, has been flowing within the city centre along the two characteristic meanders; it was artificially diverted only in the 19th century in order to protect the city from floodings.
As the recent urban expansion limits the possibility to investigate the urban area with remote sensing and field survey, the investigation focuses on the alluvial plain which extends at the western outskirts of Padua. A 70 km2 area was analysed through the integrated use of vertical and oblique aerial photographs, satellite images, digital terrain models (DTM), field survey and corings.
The most ancient Holocene channel belt recognized in the study area is the Mestrino-Rubano (MR) one, which incised the LGM alluvial plain formed during the Late Glacial Maximum (LGM) period. It was formed by the Brenta River between the Lateglacial and 6300 cal BP. A palaeochannel named "La Storta" has a high geomorphic evidence and was recognized for a stretch of 13 km; it probably was the last active river bed in the MR channel belt, between 8400 and 6300 cal BP.
The present Bacchiglione River follows another, more recent Brenta River channel belt, named Veggiano-Selvazzano (VS) channel belt. The meanders of present in the Padua city centre of Padua most probably belong to this channel belt. Chronostratigraphic data indicate that the VS channel belt was active in the 2nd millennium BC. This implies that Padua was probably crossed by the Brenta River during the Bronze Age. A single radiocarbon dating suggests that the VS Brenta River was active also in during the 2nd-–5th century AD. Such indication brings about the possibility that the Brenta River may have been flowing through the city also during the Iron Age and in Roman times, and that the Bacchiglione River established its present course in early Medieval times. This hypothesis has important implications for the reconstruction of the topography of ancient Padua, but it is based on a weak chronostratigraphy, which should be better investigated in the future. It contradicts geoarchaeological observations, which indicate no evidences of the sedimentary activity of such a large river in the city centre later than the end of the 2nd millennium BC. Moreover, previous geomorphological investigations show that the Brenta River was following the present direction since the beginning of the 1st millennium BC, which means that in the Iron Age and in Roman times the river would flow several kilometres east of the city
Late Quaternary glaciations and connections to the piedmont plain in the prealpine environment: The middle and lower Astico Valley (NE Italy)
No full textThis work concerns the Late Quaternary evolution of the Astico Valley, with a focus on the relations between the glacial complexes hosted in the terminal valley tract and the piedmont fans. Three distinct glacial events are considered in this paper. Remote sensing, field survey, stratigraphic measurements and
reconstructions, sand petrography, radiocarbon dating and pollen analyses allowed attribution of the last
one to the LGM, a previous one probably to MIS 6 and the oldest to a generic glaciation of the Middle Pleistocene. Sand petrography analyses show that all these glacial deposits contain rock fragments that reached the Astico Valley through a transfluence of the Adige glacier. During LGM, this glacial stream
entered the Astico Valley from the north through the Carbonare saddle (1075 m a.s.l.), as probably happened in previous major glaciations. The chronostratigraphy of two cores drilled near the towns of Vicenza and Villaverla shows that the outwash stream changed its route to the piedmont plain at the end
of LGM, as a response to rapid glacial collapse. This switch led to the deactivation of the northwestern sector of the plain (Thiene fan) in favour of the southeastern one (Sandrigo fan). The lower and middle Astico Valley preserved significant evidence of even minor glacial fluctuations during the LGM in response to subtle climatic changes, namely an early glacial withdrawal at 23e24 cal ka, which may be difficult to distinguish in major Alpine glaciers
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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