1,721,036 research outputs found
Patologie dei gamberi d’acqua dolce. Malattie infettive e di origine micotica. / Pathology of freshwater crayfish. Infectious and mycotic diseases
No full textRIASSUNTO - I gamberi d’acqua dolce sono considerati di estrema importanza sia dal punto di vista
commerciale, in quanto alcune specie sono estremamente apprezzate a livello di gastronomia locale e stanno
dimostrando buone potenzialità per il loro sfruttamento zootecnico, sia dal punto di vista naturalisticoambientale,
poiché a causa della loro sensibilità al cambio dei parametri ambientali rappresentano degli ottimi
indicatori della sanità di un determinato ambiente. Questa sensibilità ha portato ad una drastica riduzione delle
popolazioni europee autoctone a causa del progressivo peggioramento qualitativo degli habitat fluviali in cui
vivono, dell’ingesso sul territorio europeo di popolazioni alloctone di gamberi d’acqua dolce (i.e. Procambarus
clarkii) estremamente aggressive e maggiormente resistenti, nonché portatrici di patologie, alcune delle quali
con un impatto devastante. Fra tutte, la peste del gambero d’acqua dolce causata da Aphanomyces astaci
attualmente rappresenta il problema sanitario di maggior rilievo in Italia ed in Europa.
SUMMARY - The freshwater crayfish are considered extremely important both from a commercial aspect,
being some species extremely appreciated in terms of local cuisine and showing good potential for their
livestock exploitation, both in terms of environmental aspect, since are excellent indicators of the environment
health status for their sensitivity to alterations of their habitats. This sensitivity has led to a drastic reduction of
the native European populations for the quality worsening of surface waters and for the introduction of nonnative
populations of crayfish in Europe (i.e. Procambarus clarkii), extremely aggressive and resistant species
and often carriers of diseases some of which could have a devastating impact. Among these the freshwater
crayfish plague caused by Aphanomyces astaci currently represents one of the most significant sanitary
problem in Italy and Europe
Infestazione da Plerocercoidi di Pterobothrium sp. (Cestoda, Pterobothriidae) in Xyrichthys novacula
No full text
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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