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Le forme ecologiche del clima
No full textChanges in landscape diversity induced by climate over a Mediterranean region
Climate is certainly a controlling factor for the spatial organization of vegetation. The study of the existing links between vegetation organization and climatic parameters in nature can be extremely useful for determining the effects induced by future climate changes on our landscape. In this context, the Basilicata Region (in Southern Italy) is an ideal test area to analyze the relationship between climate and vegetation, since its territory includes a significant variety of climatic conditions. This variability affects the spatial characteristics of land cover which have been studied using landscape ecology indices. In particular, some landscape metrics are strongly influenced by the climatic conditions that are assessed through climatic indices. It was observed that the behaviour of landscape diversity is closely related to the relationship observed in literature between the number of plant species and climate. This findings can be a useful basis for planning and management of protected area.
Abstract
Il clima è certamente uno dei fattori dominanti per l’organizzazione spaziale della vegetazione e per la distribuzione degli ecosistemi alla scala globale. A questa e varie altre scale, tipo, ricchezza, distribuzione e struttura della vegetazione sono strettamente legati alla disponibilità idrica oltre che alle caratteristiche termiche dell’area. Lo studio del legame esistente tra l’organizzazione della vegetazione e parametri di carattere climatico può risultare estremamente utile per la determinazione degli effetti indotti da futuri cambiamenti climatici sul nostro paesaggio. In tale contesto, il territorio della Regione Basilicata risulta un’area ideale per testare ed analizzare il rapporto esistente tra clima e vegetazione, data la spiccata variabilità climatica del suo territorio. Tale variabilità, ovviamente, si riflette sulle caratteristiche spaziali della copertura del suolo. In particolare, le metriche del paesaggio (indici di ecologia del paesaggio) mostrano un netto controllo da parte delle condizioni climatiche che nel presente caso sono state descritte mediante il ricorso ad indici climatici (descrittori sintetici del clima). La diversità strutturale del paesaggio mostra forti analogie con le relazioni riscontrate in letteratura tra numero di specie vegetali e clima. Tale riscontro può fornire utili indicazioni sulla individuazione e perimetrazione di aree protette e sulla loro gestione
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Valutazione dell’esposizione professionale al bromuro di metile nelle attività di fumigazione
No full text
Serum and urinary zinc and copper in epileptic syndromes. Effect of treatment with specific drugs (preliminary data).
No full textVariations on the Author
Get PDF“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
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