1,720,997 research outputs found
The importance of ponds for the conservation of bats in urban landscapes
No full textPonds have an important role in the ecology of urban areas, as they provide essential habitats to aquatic species, as well as fundamental resources to terrestrial wildlife. Artificial water sites such as urban ponds provide foraging and drinking resources to synurbic wildlife, among which bats stand out as an important group. Availability of water sources may thus strongly influence the persistence of animal populations in urban habitats. Pond characteristics, as well as landscape structural patterns in the surrounding area, may modulate the use of such water sites by bats. We investigated bat species richness and activity levels in a pond archipelago within the city of Rome, one of the largest urban areas in Italy. We hypothesized that the presence of woody vegetation and hedgerows affects activity rates over ponds and that bat responses to habitat and landscape structures as well as artificial illumination are species-specific. Bat species richness was mainly influenced by the availability of wooded vegetation within 1000 m around ponds, with minor effects of the amount of bank habitat, while bat activity was affected by different habitat features in a species-specific way. All species responded positively to pond proximity to linear landscape elements such as hedgerows and to the amount of bank habitat. The presence of natural banks, the amount of woodland and that of open green areas positively influenced the activity of different species at different scales, while distances between ponds and artificial lights had a species-specific effect direction. Our results highlight the importance of key factors characterizing ponds and the surrounding habitat in urban landscapes whose appropriate management may improve the viability of synurbic bat populations
Sensibilità di 4 cv di olivo alla Spilocaea oleagina (Cast.) Hugh.
No full textE’ stata valutata la sensibilità all’occhio di pavone, causato dalla Spilocaea oleagina, di 4 cultivar di olivo: “Caiazzana”, “Leccino”, “Coratina” e “Itrana”, presenti in oliveti siti nel comune di Piana di Monte Verna, in provincia di Caserta. Utilizzando il metodo della diagnosi precoce per la valutazione dei sintomi, dopo 12 mesi di saggi, si è accertato che le prime due cv sono da considerare resistenti, mentre le due rimanenti si sono mostrate molto suscettibili alla malattia
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
Bioremediation of a PCP contaminated soil by using fungi and compost.4th International Congress Eurosoil
No full text- …
