1,721,101 research outputs found
Selezione del territorio di nidificazione del Gufo reale Bubo bubo in provincia di Trento (Alpi centro-orientali)
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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
Land-use and bird occurrence at the urban margins in the Italian Alps: implications for planning and conservation
Full text linkNegative effects of urban sprawl on biodiversity are widely recognised, but information on how to counteract such effects are still scarce, especially for urban ecosystems in mountain regions.
We evaluated the effect of land-use and topography on the occurrence of eight passerine species in five urbanized study areas in the Italian Alps, which have undergone recent urban sprawl. Our aim was to identify the best planning and management practices to favour these indicator species in mountain periurban areas.
We surveyed the species' presence/absence at 142 point counts during the 2013 breeding season and evaluated the effects of environmental variables on occurrence using binomial multivariate adaptive regression splines (MARS). Species occurrence was mostly affected by meadows (positively) and woodland (negative effect, except in contexts with high meadow cover or high habitat diversity).
In Alpine valleys affected by recent sprawl, the conservation or restoration of grassland patches and the maintenance of heterogeneous landscapes can contribute to the conservation of some species of conservation concern found in suburban habitats. Afforestation, a common mitigation practice in and around urban centres, could be counter-indicated when urbanization occurs at the expense of open and semi-open habitats.
Keyword
Definizione delle aree di origine di alcuni migratori in transito attraverso le Alpi italiane durante la migrazione post-riproduttiva sulla base del profilo isotopico delle penne e dei dati di inanellamento
No full textApplicazione del Piano di gestione del gambero di Fiume autoctono (Austropotamobius pallipes complex) in Trentino: primi risultati
Full text linkIl monitoraggio del gambero di Fiume Austropotamobius pallipes complex e dei suoi habitat è stato effettuato nell’estate-autunno 2019-2021 nel territorio della Provincia Autonoma di Trento, quale primo triennio di implementazione del Piano di gestione del gambero di Fiume in Trentino realizzato nell’ambito del Progetto Europeo Life+T.E.N. Sono stati selezionati 224 corpi idrici, 26 dei quali situati all’interno della Rete Natura 2000. Indagini svolte sul campo hanno portato ad escludere 79 siti per via della mancanza delle caratteristiche essenziali alla vita del gambero. Nei rimanenti siti sono state rilevate le caratteristiche ambientali degli habitat e la presenza/assenza della specie. Sono 42 le popolazioni rilevate mentre 2 ulteriori popolazioni sono segnalate ma non sono state indagate. Per definire lo stato di conservazione delle popolazioni presenti, è stata valutata l’abbondanza di 35 popolazioni e, tra queste, sono stati rilevati i dati biometrici e la presenza/assenza di infestazioni evidenti da parassiti e patogeni di 28 popolazioni. Le principali minacce rilevate, rappresentate dall’alterazione degli habitat e dalla presenza di due specie aliene invasive, Procambarus clarkii e Faxonius limosus, in uno e sei siti rispettivamente, suggeriscono una strategia gestionale che favorisca il miglioramento delle condizioni ecologiche degli ambienti acquatici e una maggiore connessione tra di essi e garantisca il controllo della diffusione delle specie aliene e dei loro patogeniThe monitoring of the crayfish Austropotamobius pallipes complex and its habitats was carried out in the summer-autumn 2019-2021 in the territory of the Autonomous Province of Trento, as the first three years of implementation of the Crayfish Management Plan in Trentino which represented one of the outcomes of the European Project Life+T.E.N. Two hundred- twenty-four water bodies were selected, 26 of which are located within the Natura 2000 network. Seventy-nine of these sites were found to be unsuitable after the field survey of the environmental characteristics. In the remaining sites, which were conformed to be suitable, we surveyed the environmental characteristics of the habitats and the presence/absence of the species, which was detected/confirmed in 42 populations, while 2 further populations are signalled but were not investigated. Population abundance was measured in 35 populations and biometric data, the presence/absence of visible infestations by parasites and pathogens were measured in 28 of those populations, to assess the conservation status of the populations. The main detected threats for the populations of A. pallipes are represented by habitat alteration and the presence of the two invasive alien species Procambarus clarkii and Faxonius limosus in one and six sites respectively. The threats suggest a management strategy that would increase the ecological conditions and connectivity of the aquatic habitats and ensure the control of the spread of alien species and their pathogens
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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