1,721,087 research outputs found
OTOLITH SHAPE ANALYSIS WITHIN SPECIES: AN APPLICATION ON SAGITTAL OTOLITH OF EUROPEAN ANCHOVY FROM GSA 17
No full textThe aim of this study is to provide an efficient use of otolith morphology in order to
discriminate which potential parameter affects shape variability within species. Combined geometric
morphometrics and EF analyses identify the latitudinal gradient as one of the parameter that discriminated
European anchovy otolith shapes from two areas in Adriatic Sea (North and middle sector)
Trophic biology of Merlangius merlangus (Linneo, 1800) (Osteichthyes, Gadidae) in the North Adriatic Sea.
No full textIt has been studied the diet’s composition of Merlangius merlangus (Osteichthyes, Gadidae). The specimens have been captured in the north Adriatic sea all year long. This is a nekto-benthic species and it prefers Crustacea and Teleostea, with fluctuations related to seasons and the reproductive period. There are less important diet constituent like Policheta and Cephalopoda
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
Influenza della composizione della spiaggia sul successo riproduttivo di Caretta caretta lungo la costa ionica della provincia di Reggio Calabria.
No full textLa costa ionica della provincia di Reggio Calabria è la più importante area di nidificazione della tartaruga marina Caretta caretta a livello nazionale ospitando annualmente tra il 60% e l’80% circa dei nidi deposti in Italia. Oltre alla complessa serie di posidonieti presenti nell’area marina, la linea di costa è caratterizzata da diversi habitat dunali dell’All. I. della Direttiva Habitat. Nell’ambito delle attività di conservazione e monitoraggio operate dall’associazione Caretta Calabria Conservation si è indagata la struttura dei diversi siti di deposizione conosciuti al fine di verificare potenziali influenze delle variabili geo- pedomorfiche sul successo riproduttivo di Caretta caretta. La composizione della sabbia prelevata a non oltre 1 m di distanza, e alla profondità di 40 cm, da 12 nidi monitorati è stata studiata con metodi standard per identificare la granulometria e il contenuto di sostanza organica, oltre a verificarne la colorazione mediante analisi di immagine e la capacità di trasmettere calore mediante uno specifico metodo di prova. I risultati conseguiti mostrano un certo differenziamento lungo la costa con aree specifiche con maggior contenuto in ghiaia). La colorazione, pur nelle differenze dovute alla specifica composizione percentuale e alle variazioni dimensionali, non mostra differenze significative, così come la percentuale della frazione organica. La conducibilità termica dei diversi substrati ha mostrato notevoli differenze tra i campioni analizzati, ribadendo come le variazioni del substrato, anche a breve distanza, possano influenzare in modo significativo la capacità di incubazione delle uova. Il raffronto con il successo di schiusa però non ha dato riscontri significativi così come sulla durata dell’incubazione. Rimane quindi fondamentale per il successo riproduttivo lo stato di nutrizione e la storia di ogni femmina riproduttiva e, quando necessario, l’accuratezza dei metodi di traslocazione dei nidi posti in posizioni svantaggiose, a sostegno delle azioni di conservazione avviate nell’area di studio
Feeding habits of Trisopterus minutus capelanus (Lacepede, 1800) (Osteichthyes, Gadidae) in the North Adriatic Sea
No full textThe paper examines the diet's composition of Trisopterus minutus capelanus A total of. 303 specimens have been captured in the north Adriatic sea all year long. This is a nekto-benthic species and it prefers Crustacea and Teleostea. There are some less important diet constituent like Polichaeta, Bivalvia and Cephalopoda. Crustacea are prevalent always, but decrease in winter and reproductive period, conversely to Teleostea
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
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