1,720,959 research outputs found
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
The geology of Valchiavenna in the frame of the Central Alps: recent insights from the CARG project 038 “Chiavenna”, 021 Passo dello Spluga, 022 Madesimo and 037 Bodengo
No full textThe study and comprehension of the geodynamic history and tectonic structure of the Central Alps has always represented a key to unravel the emplacement of the whole Alpine structure and to better understand a great range of pre-alpine magmatic and metamorphic events. The extreme geological complexity of this area still presents several unsolved problems, both at local and regional scale. For this reason, a great number of past works focused on this portion of the Alpine chain, trying to address a wide range of problematics and providing interesting insights for the review and understanding of the Alpine orogeny.
New lymph on Central Alps geology has been recently provided by the beginning of new geological surveys in the area of Valchiavenna, lower Valtellina and Alto Lario, in the frame of the CARG Project (Carta Geologica d’Italia alla scala 1:50.000, geological sheets 038 “Chiavenna”, 021 “Passo dello Spluga”, 022 “Madesimo”, 037 “Bodengo”). Four geological sheets are underway in this province, that falls in the middle of the axial zone of the Central Alps, along the Italy-Switzerland national border. It comprehends a predominant mountain area of approximately 770 km2, characterized by a hostile topography with altitudes ranging from 200 to 3300 m a.s.l.
Most of the territory sees the exposition of different poly-metamorphic basements belonging to the Penninic nappe stack (Adula, Tambo and Suretta Nappes) (Schmid et al., 2004), divided by slices of metasedimentary covers and/or tectonic mèlanges and intruded by some pre-Alpine granitoid bodies (e.g. Truzzo Granite and Roffna Porphyry Complex) (Marquer et al., 1998). The nappe stack is juxtaposed by some structural and paleogeographic uncertain units, as in the case of the Chiavenna Unit, a mafic-ultramafic complex, and the Gruf Complex, that represents one of the less studied units of the Central Alps. Due to the presence of unique high-grade rocks as sapphirine granulites, charnokites and migmatites (Galli et al., 2013), this unit has represented an enigma for its tectonic attribution and it could play a key role in the geological comprehension of the Central Alps. Two tertiary magmatic bodies, the Bergell Pluton and the Novate Granite, emplaced in the south-eastern part of the study area (Berger et al., 1996), surrounded by a multitude of tardive aplitic and pegmatitic swarms, the source of which is still to be definitely identified. Several lineaments cross the study area: the Forcola Line, westward, divides Adula Nappe from Tambo Nappe, while the Engadine Line, eastward, runs alongside the contact between Chiavenna Unit, Tambo Nappe and Gruf Complex. The Insubric Line, to the south, divides Penninic and Asutroalpine from Southalpine domain.
This work aims to introduce the study area involved in the production of the four geological sheets of the CARG project Valchiavenna, and to present the advances on the field work, through several examples on the main geological features of the area, with the aid of traditional and innovative survey techniques, as digital mapping and drone photogrammetry.
The research on a great number of previous bibliographical works, joined to field work and laboratory analyses, could be a chance to reconsider and solve the main issues of this portion of the Central Alps, providing a starting point for more in-depth studies that can finally shed light on the complex tectonic structure of the Alps
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
Carta Geologica d’Italia alla scala 1:50.000, Foglio 003 Vetta d’Italia con Note Illustrative
No full textDispelling 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
Ground-based geological mapping integrated by UAs in the Chiavenna area (Central Alps): examples of application in the frame of the CARG project
No full textGround-based geological mapping integrated by UAs in the Chiavenna area (Central Alps):
examples of application in the frame of the CARG project
Tartarotti P.*1, Apuani T.', Arrigoni F.', Conforto A.', Pigazzi E.', Tantardini D.' & Toffolon G.?
1 Dipartimento di Scienze della Terra
"A. Desio", Università di Milano. 2 Contractor CARG-Valchiavenna Project.
Corresponding author e-mail: [email protected]
Traditional ground-based mapping of cry stalline basements is essential to unravel their tectono-metamorphic
evolution. However, the structural setting of metamorphic terranes is most of the time complicated by the
polyphase history, not least by neotectonics. Many scientific difficulties can be overcome by implementing
the field work with analytical investigations, such as chemical or geochronological analyses, that may solve
several geological issues as long as the structural and microstructural features are well constrained. Recently, an
interest has been growing in advanced technologies dedicated to data acquisition and applications in geological
mapping. Nowadays, unmanned aerial systems (UASs) such as drones are more and more utilised, especially
in mineral exploration and mine exploitation (.g., Honarmand & Shahriari, 2021). Drone photogrammetry
is particularly useful in inaccessible areas, opening a new perspective for all kinds of ground operators. We
used DJI Mavic 2 Pro and DJI Mavic Mini drones to implement the traditional field work on crystalline
basements in the Chiavenna area (Central Alps), within the frame of the project '
"Carta Geologica d'Italia
at scale 1:50.000 - CARG', covering ca. 700 kmq. This area is characterized by altitudes ranging between
200 and 3300 m a.s.l., and by a hostile topography with steep slopes and few road access that make many
outcrops scarcely or not reachable. Most of the territory sees the exposure of polymetamorphic basements of
the Penninic Suretta, Tambò, and Adula Nappes, separated by sheets of Mesozoic metasedimentary rocks, the
Chiavenna unit, interpreted as a remnant of the Valais Ocean, and the Gruf Complex, whose attribution is still
uncertain, intruded in the southeastern portion by the Bergell pluton (Schmid et al., 1996). UAS tools turn to
be fundamental in such kind of terrains, whose applications regard the recognition of different lithologies on
exposed surfaces, structures, morphologies, and landslides. Reiteration of field and intermediate laboratory
work, with UAS-assisted surveys is necessary to finalise the geological mapping and its interpretation.
Honarmand M. & Shahriari H. (2021) - Geological Mapping Using Drone-Based Photogrammetry: An Application for
Exploration of Vein-Type Cu Mineralization. Minerals, 11(6), 585.
Schmid S. M., Pfiffner O. A., Froitzheim N., Schönborn G. & Kissling E. (1996) - Geophysical-geological transect and
tectonic evolution of the Swiss-Italian Alps. Tectonics, 15(5), 1036-1064
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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