1,721,042 research outputs found
La Libia vista da Edoardo Zavattari
No full textLibya as seen by Edoardo Zavattari. The authors propose a synthesis of the researches carried out in Libya by Edoardo Zavattari between 1927 and 1935, a period in which the scientist was active at the University of Pavia in the role of director of the Istituto and Museo di Anatomia e Fisiologia comparate. The campaigns, organized to study human and animal parasitology, were conducted in the Cyrenaica and Fezzan regions. These studies enabled also the collection of over 200 species of invertebrates and vertebrates whose research, carried on by various zoologists, revealed several new species among which eight were dedicated to him. The parasitological studies dealt especially with the digenetic trematode Schistosoma haematobium, a major agent of schistosomiasis. Zavattari confirmed the presence of this species for Cyrenaica and was the first one to report it for Fezzan, finding out also its distribution and frequency. With the collaboration of Vittorio Erspamer he was able to provide an initial overview on the hematology of this parasitic disease. He studied also malaria in Fezzan, finding that Plasmodium vivax was responsible for most of the cases, but had limited distribution and could be easily kept under control
La collezione di pesci abissali Mazzarelli del Museo di Storia Naturale dell'Università degli studi di Pavia
No full textThe author presents the catalogue of Giuseppe Mazzarelli collection of bathypelagic and bathydemersal fish from the Strait of Messina preserved in the Natural History Museum of the Università degli Studi di Pavia. The material has been collected at the beginning of the XIX century and includes 401 specimen belonging to the families: Argentinidae, Microstomatidae, Gonostomatidae, Phosichthyidae, Sternoptychidae, Stomiidae, Chlorophthalmidae, Myctophidae and Cepolidae
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
Materiali, spazi e comunità di pratiche per la biodiversità: la collezione cecidologica di Alessandro Trotter
No full textUna delle linee di ricerca del National Biodiversity Future Center è lo studio e la valorizzazione delle collezioni naturalistiche italiane intese come “archivi materiali” per comprendere il nostro rapporto con la biodiversità. Il contributo analizza un caso particolare di collezioni, quelle cecidologiche, caratterizzate da campioni di galle (o cecidi), le tipiche protuberanze vegetali che si formano sulle piante per l’azione di altri organismi viventi, come insetti, acari e funghi. In questo senso sono delle collezioni “ibride”, al confine tra botanica e zoologia, che presentano diverse tecniche di preparazione e conservazione. In questo ambito, la raccolta del botanico Alessandro Trotter (1874-1967), formatasi nel periodo 1890-1940 e ora conservata presso il Museo Botanico dell’Università di Padova, gioca un ruolo importante per capire i processi di creazione e le sfide, a livello storico-scientifico e museologico, di una collezione interdisciplinare “per natura”
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
Roberto Sindaco, Alberto Venchi, Cristina Grieco. The Reptiles of the Western Palearctic. 2. Annotated checklist and distributional atlas of the snakes of Europe, North Africa, Middle East and Central Asia, with an update to the Vol. 1.
Full text linkPietro Giovacchini, Valentina Falchi, Sergio Vignali, Giacomo Radi, Luca Passalacqua, Fausto Corsi, Marco Porciani, Fabrizio Farsi. Atlante degli anfibi della Provincia di Grosseto (2003-2013)
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