1,721,260 research outputs found
Who am i? Testing I3S contour on the facial mask of the western polecat (mustela putorius)
No full textIndividual recognition of wild animals is a fundamental tool to acquire information about the structure and dynamics of animal populations. Recently, individual identification from camera trapping has been successfully applied to Capture-Mark-Recapture (CMR) studies in various taxa. We collected 281 photos of 48 specimens of Western Polecat (Mustela putorius) from various Italian Museums to test the capabilities of I3S contour software to automatically recognize different individuals from their facial mask. After selecting 52 high quality pictures from different specimens, we obtained a 100% success rate of correct individual identification. This suggested that both facial mask pattern and automatic identification might be successfully applied to the study of this highly elusive species through camera trapping
Daily and circadian rhythms of rest and activity of Talpa romana Thomas (Mammalia, Insectivora: Talpidae). Preliminary results
No full textDaily and circadian rhythms of rest and activity were investigated on six adult moles
(Talpa romana). Preliminary results from a seven months study are presented. Animals were housed in separate cages and their activity monitored by means of automatic recording. Two sessions of automatic recording were run in different captive conditions and photoperiod regimes (natural light/dark conditions and constant dark). As a general rule, all activities showed a link with photoperiod under LD conditions. All animals displayed a clear diurnality in spite of strong interindividual differences in their activity pattern. In constant dark, two moles out of three showed a marked loss of organization in their activity pattern and absence of a clear circadian rhythmicity. Despite the absence of exposition to the natural LD cycle in subterranean environment, preliminary results suggest that light is likely to maintain a role in the regulation
of activity patterns also in this fossorial species
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
La guglia settecentesca di Sant'Oronzo (Ostuni - BR - Italia): materiali lapidei utilizzati e antiche cave di provenienza
No full textIn "Le Scienze della Terra e l'Archeometria
Microhabitat strutturale di due specie di roditori, Apodemus sylvaticus e Mus musculus, in un ambiente di macchia mediterranea
No full textVariations 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
Geometric morphometrics and morpho-anatomy: a combined tool in the study of sea bream (Sparus aurata, sparidae) shape
No full textThe effects of different conditions of larval and postlarval rearing on the external morphology and morpho-anatomical characters were studied on adult specimens of Sparus aurata L. (Teleostea, Sparidae) after 15 months of common rearing in floating cages. Differences in external morphology between two samples were analysed with geometric morphometrics. Despite common rearing, significant differences in shape were found, evidence of the importance of larval and postlarval rearing conditions in determining shape features. On the same specimens. morpho-anatomical data were collected using X-rays, thus making it possible to correlate fish shape with morphoanatomical data. Characteristic shapes were associated with particular cadres of morpho-anatomical anomalies, such as lordosis of different body regions and the bending of the same. Streamlined wild-like profiles were associated with light anomaly cadres. Fish shape is an important component affecting the market value of the species. The use of the combined approach proposed is thus recommended in the description and quantification of shape features, particularly in the context of fish quality assessment
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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