1,354,184 research outputs found
Influence of fish farming on the spatial patterns and biological traits of river invertebrates in an Appenine stream system (Italy)
No full textIn applied river ecology it is implicitly assumed that community structure is a surrogate for functional properties. To test this hypothesis, 26 sites were sampled for macroinvertebrates in a Central Italian stream system impacted by 13 trout farms (1 upstream and 1 downstream site per facility). We used a fuzzy-coding approach of biological traits combined with species distribution analysis. Trout farm locally impacted the structure of macroinvertebrate communities, but serial disturbances at the stream system scale did not affect the overall regional diversity pattern. Impacted sites had species with large body size, which fed upon microorganisms and fine detritus, and which showed asexual reproduction. Least impact sites hosted small-sized invertebrates showing sexual reproduction, and feeding upon plant material and/or algae
Local extinction and colonisation in native and exotic fish in relation to changes in land use
No full textDistribution patterns of many native and exotic fish species are well documented, yet little is known about the temporal dynamics of native and exotic diversity in relation to changes in land use. We hypothesised that colonisation rates would be higher for exotic fish species and that extinction rates would be higher for native species in large stream systems. We also predicted that cold-water species would be more impacted than thermally tolerant species. To test these hypotheses, we used generalised linear mixed models to compare changes in native and exotic fish species richness over 10 years in a French drainage basin subjected to landscape alterations. Exotic fish were more susceptible to local extinction than the native ones. Extinction was greater among cold-tolerant species and at higher elevations. Colonisation by exotic species was higher at lower elevations. Although a decade of expanding urbanisation affected fish colonisation, agricultural lands experienced higher extinction rates. In the context of global changes in land use and population pressure, our study suggests that the temporal dynamics of fish diversity are driven by landscape alterations as well as by the thermal tolerance of species
Exploring the COMPIN-10 and SUCOMP-10 Scales: Measuring Inferiority and Superiority Complexes Across Nine Countries
No full textU ovome se radu predstavljaju ispitivanja kratkih ljestvica kompleksa inferiornosti (COMPIN-10) i kompleksa superiornosti (SUCOMP-10). Sudionici (N = 4010; 57 % žena) iz devet zemalja u dobi između 18 i 77 godina (M = 29.68, SD = 10.62) mrežnim su putem ispunili ljestvice na svojim materinskim jezicima. Ispitane su pouzdanost, dimenzionalnost i konvergentna valjanost ljestvica. Potvrđeni su zadovoljavajući koeficijenti pouzdanosti za obje ljestvice. Jednodimenzijsku strukturu ljestvice COMPIN-10 podržali su uzorci iz različitih zemalja, dok ljestvica SUCOMP-10 nije pokazala jednodimenzijsku strukturu. Osim toga, rezultati su ukazali na to da je ljestvica COMPIN10 postigla jedino invarijantnost opterećenja, dok se kod ljestvice SUCOMP-10 nije pokazala invarijantnost među zemljama. Rezultati na ljestvici inferiornosti bili su negativno povezani s mjerama samopoštovanja, ekstraverzijom, ugodnošću i savjesnošću, a rezultati na ljestvici superiornosti bili su pozitivno povezani s mjerama samopoštovanja, ekstraverzijom i savjesnošću, što potvrđuje konvergentnu valjanost obiju ljestvica u uzorcima svih zemalja. Rezultati ove višenacionalne studije pokazuju da je ljestvica COMPIN-10 robusniji istraživački instrument; međutim, preporučuju se daljnja revizija i usavršavanje obiju ljestvica.This study introduces the short Inferiority Complex (COMPIN-10) and Superiority Complex (SUCOMP-10) scales. Participants (N = 4,010; 57% women), aged between 18 and 77 years (M = 29.68, SD = 10.62), were recruited from nine countries and completed the scales online in their native languages. The reliability, dimensionality, and convergent validity of the scales were examined. Satisfactory reliability coefficients were confirmed for both scales. The unidimensional structure of the COMPIN-10 scale was supported across country samples, whereas the SUCOMP10 scale did not exhibit a unidimensional structure. Additionally, the results indicated that the COMPIN-10 scale only achieved loading invariance, while the SUCOMP-10 scale lacked invariance across countries. The inferiority scores correlated negatively with self-esteem measures, extraversion, agreeableness, and conscientiousness, and the superiority scores correlated positively with self-esteem measures, extraversion, and conscientiousness, confirming the convergent validity of both scalesin the respective country samples. The results of this multi-country study indicate that the COMPIN-10 scale is a more robust research instrument; however, further revision and refinement of both scales is recommended
Étude clinique des formes anormales de la maladie de Parkinson / par le Dr Paul Compin,...
No full textContient une table des matièresAvec mode text
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
No full textWe 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
Université de Paris. Faculté de droit. Essai sur le blocus maritime en temps de guerre, thèse pour le doctorat. L'acte public... sera soutenu le... 20 novembre 1899... par Gaston Compin,...
No full textContient une table des matièresAvec mode text
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
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