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Censimento e valutazione dei siti paleontologici (Paleositi):un esempio per la Provincia di Pisa
No full textCensus, evaluation and valorization of the paleontological
sites: an example for the Province of Pisa. This
study is included among the initiatives carried out in these
last years in Europe, and partly also in Italy, to the safeguard
and the valorization of the geologic patrimony. An informatized
database, a digital map and a criterion for the evaluation
of the paleosites located in the Province of Pisa have
been realized using an innovative methodological approach,
at least as regards the paleontological field. The main fields
considered in the construction of the database are: the location
of the fossil deposit; the typology (extension, use of the
ground, etc.); the state of preservation; the interest degree
and the date of discovery. Moreover, fields relative to the
bibliographical data, the fossils collected, the geologic information
and the complete list of all the species reported, with
details on the frequency, the state of preservation and depositional
environment have been included in each record. The
database has been constructed in such way to make as simple
as possible its update, eventually also by people not
skilled in paleontology, and the search and fruition of all the
information contained. In addition to the database an HTML
page has been constructed for each site providing its description
and the photographic documentation.
All the paleosites considered have been included in the informatized
geologic map (GIS) of the Pisa Province to allow
their localization on different topographic or thematic maps
the territory.
The paleosites considered have been evaluated on the basis
of their scientific, didactic, historical and turistic-naturalistic
interest using a newly proposed series of parameters here
described in detail.
By the end of this research more than one hundred of paleosites,
heterogenously spread in the Pisa territory had been
described and mapped. More than 1,500 species of fossil
invertebrates, vertebrates and plants had been listed.
Some paleosites have a wide areal extension (e.g.: Orciano
Pisano), whereas others consist in outcrops located in well
delimitated areas as, for example, quarry walls or relief portions
subject to natural erosion (e.g.: Agnano). Sites represented
by punctual findings of particular importance (generally
vertebrates) have been also described.
This work has evidenced how the paleosites may present different
potentialities and interests of various natures.
Two paleosites, Agnano and Orciano Pisano, emerge for their
high scientific interest: the former is famous for the dinosaurs
Triassic footprints and the latter for its Pliocene fauna of both
marine vertebrates and invertebrates. Nine localities are of
great historical importance, beeing already known in the 19th
century and cited in many ancient publications.
The site of San Giuliano mountains is characterized by its
high turistic-naturalistic value, beeing situated in a protected
area of great naturalistic and landscape beauty with elements
of both environmental and artistic interest. The paleosites of
greatest didactic potentiality are located in the area of Saint
Miniato and generally on the Pisa hills, where Plio-
Pleistocene loose sediments very rich in fossil molluscs frequently
outcrop. Agnano and the San Giuliano mountains
resulted as the sites with the highest total interest
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
Paleontological sites using GIS and an informatised database: an application in the Province of Pisa (Italy)
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