1,721,001 research outputs found
Webinar Festival dello sviluppo sostenibile 2024. Webinar: Lavoriamo per mitigare il riscaldamento climatico (riusciranno i nostril eroi?)
No full textPer seguire l’evento
https://unipd.zoom.us/j/83702411565
Il 16 Maggio 2024 Dalle ore 14.00 alle ore 15.30
14.00. Francesca Visentin: L’evoluzione dell’humus e della fauna del suolo nelle foreste colpite dalla Tempesta Vaia
14.10. Silvia Chersich: Quale futuro per le prateriae alpine?
14.20. Rosangela Addesso e Adriano Sofo: Le micro-alghe del suolo agricolo e conseguenze sull’agricoltura di domani
14.30. Mauro Reguzzoni: La stabilità dei versanti montani sottoposti a pressioni recenti dovute al cambiamento climatico
14.40. Augusto Zanella e Lingzi Mo: Come utilizzare il suolo per fronteggiare il cambiamento climatico e la crisi della biodiversità
14.50. Paola Galvan e Pio Deconcini: Scuola, artigianato e società. Fare cosa e per chi? 15.00: DISCUSSION
Le vermicolazioni delle Grotte di Pertosa-Auletta, un brulicare di forme di vita microbica estrema
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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
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
Dripping and underground river waters shed light on the ecohydrology of a show cave
No full textWater and air flows connect underground ecosystems to the surface, affecting the cave chemical and physical properties. Together with the visitor's fluxes in show caves and occasional presence of cavers in wild caves - excluding the large amounts of organic supply by bat or bird colonies or large sinking rivers bringing vegetal debris-fluid flows are the main means of transport of nutrients into the normally oligotrophic cave environment. The aim of this work was to investigate the chemical characteristics of waters in the Pertosa-Auletta Cave (Italy), focusing on drip water and on the underground Negro river, seasonally and in different areas of the cave. In particular, three trails with different environmental characteristics and tourism pressure were investigated in order to shed light on the processes affecting the ecological equilibrium of the hypogean ecosystem. Dripping and flowing river waters, both rich in Ca because of their interaction with carbonate rocks, show distinct chemical signatures regarding the other chemical elements (especially K and Mg) due to lithological and hydro-dynamical differences. Moreover, water chemistry is affected by the seasonality in the pluviometric regime owing to the subsequent variability in the dilution effect. Bat colonies, dwelling mainly along the fossil trail, enrich dripping waters with P and N. Their concentrations have also been found at fairly high values across the whole trail network, suggesting an additional potential role of leaching from agricultural and forested soils above the Pertosa-Auletta Cave in defining dripwater chemistry
Comunità microbica delle vermicolazioni provenienti da cavità carsiche e il suo ruolo nella loro formazione
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