1,720,958 research outputs found
Evoluzione morfologica e caratteristiche ambientali del tratto costiero occidentale napoletano
No full textSubmerged depositional terraces in the Gulf of Policastro (Southern Tyrrhenian sea, Italy).
No full textI processi morfologici e sedimentari che si attuano nella porzione settentrionale e meridionale del Golfo di Poicastro si differenziano grazie all’assetto strutturale del Golfo che non è indicativo di un “tipico margine passivo”. Infatti, il sistema piattaforma - scarpata che borda il bacino di Sapri, nella porzione settentrionale, è caratterizzato da un marcato controllo strutturale e risulta essere sin dalla sua impostazione in evidente erosione. Invece, il controllo strutturale è meno evidente nel settore meridionale, che presenta gli effetti di processi di progradazione e aggradazione, facilitati dal significativo apporto clastico dei corsi d’acqua (es. fiumare) che dissecano il margine della Calabria settentrionale. Ciononostante, sebbene i contesti morfostrutturali attuali e verosimilmente di 18.000 anni fa della porzione settentrionale e di quella meridonale del Golfo di Policastro siano differenti, i corpi sedimentari sommersi con geometria esterna terrazzata, presentando quasi le stesse caratteristiche, hanno probabilmente la medesima genesi. La loro origine sembra sia da ascrivere a processi sedimentari avvenuti nel corso dello stazionamento basso del livello del mare durante l'ultimo episodio glaciale. In tale occasione il mare si ritirò sino all'attuale isobata dei -110/-120 m nel Margine Tirrenico Orientale determinando lo spostamento dell'antica linea di riva sino a profondità inferiori al ciglio attuale della piattaforma, favorendo così la genesi di depositi di spiaggia regressivi progradanti. In assenza di apporti sedimentari veniva favorita la deposizione di depositi progradazionali di regressione "forzata", costituiti da depositi costieri gradualmente più recenti verso mare ed in generale ben preservati sui margini continentali, che presentano nel settore indagato caratteristiche analoghe a quelli individuati lungo altri margini continentali
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
RUOLO DEI CANYONS SOTTOMARINI NELLA CATTURA DEI SEDIMENTI MARINI COSTIERI NEL GOLFO DI TARANTO.
No full textThe role of the submarine canyons on the coastal sediments capture in the Gulf of
Taranto
In the submerged area of the Gulf of Taranto many submarine canyons are
located. They play an important role in the transfer of terrigenous deposits from coastal
toward deeper basins. When the sediments, coming along the shelf, intersect the heads
of the canyons, fall down in his bed flowing toward greater depth as gravity flows.
Moreover to such transfer of sediment, the erosion and the widening of canyons, as well
as the progressive reduction of the continental shelf, is occurred.
The characters of the sediments on the investigated areas underline the role that
these forms have in the sedimentary dispersion; the slope and basin deposits show the
same characteristics of shelf sediments to testify their origin in coastal areas and allows
to suppose the transport ways conditioned by the narrow section shape of the canyons.
The sandy deposits located in areas with narrow shelf are transported by coastal
currents and captured by canyons heads, where they are trapped and used as source of
periodic turbidity currents moving towards deeper areas
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
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
- …
