1,720,977 research outputs found
Il territorio
No full textIntroduzione al territorio sudanese e all'area archeologica del Jebel Barka
Long-term colonization and extinction patterns of a forest-dependent rodent (Muscardinus avellanarius) in highly fragmented landscapes
No full textColonization and extinction events play a major role in influencing long-term population dynamics, particularly in fragmented landscapes. Nevertheless, empirical knowledge on which factors drive these processes is still lacking for many mammals, likely due to difficulties in conducting long-term large-scale field studies. To determine which landscape features affect local colonization and extinction in Muscardinus avellanarius - a species highly sensitive to human landscape modifications - we collected detection/non-detection data in highly fragmented landscapes scattered through central Italy during a 7-year large-scale (approximate to 11000 km(2)) study. We fitted multi-season occupancy models to our data; the results showed that both local colonization and extinction processes were driven by the level of connectivity in the landscape surrounding a patch. Specifically, the colonization probability of a patch increased with the number of patches within 1 km: the higher the number of surrounding patches, the higher the probability of colonization. Similarly, the extinction probability was positively affected by the mean edge distance to other patches within 1 km: the higher the mean edge distance - that is, surrounding patches at greater distance - the higher the probability of extinction of the local population. Our findings provide empirical evidence to support management actions aimed at conserving the hazel dormouse in areas where the populations are declining or threatened by habitat loss and fragmentation
Il leone e la montagna. Scavi italiani in Sudan. Ediz. a colori
No full textA quasi cinquanta anni dalla sua fondazione, la Missione Archeologica Italiana in Sudan – Jebel Barkal raccoglie, in un evento espositivo che si muove tra Roma (sede universitaria della prima direzione della Missione) e Venezia (sede universitaria dell'attuale direzione), reperti che lasciano il Sudan per la prima volta e che provengono dallo scavo dell'antica città di Napata. Pur nella loro fragilità e frammentarietà, questi materiali sono ancora in grado di fornire – grazie anche a un corredo di testi, immagini e ricostruzioni grafiche prodotto dagli archeologi della Missione – un quadro quanto più esauriente possibile dell'area cerimoniale di epoca meroitica, fiorita ai piedi del Jebel Barkal intorno al I sec. d.C.
La mostra Il Leone e la Montagna accompagnerà il visitatore alla scoperta di un mondo ancora poco noto e di una cultura che fa da ponte tra Africa, Egitto e Mediterraneo
Habitat fragmentation causes overcrowding? A case study about rodent small mammals (Apodemus flavicollis, Apodemus sylvaticus, Myodes glareolus) in central Italy
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Data, R Code, and Output Supporting: Evaluating species-specific responses to camera-trap survey designs
No full textThese files contain data, R code and associated output supporting results presented in "Iannarilli, F., Erb, J., Arnold, T. W., and Fieberg, J. R. (2020). Evaluating species-specific responses to camera-trap survey designs. Wildlife Biology". In this paper, we assess species-specific responses by ten medium-to-large North-American carnivores to different survey design strategies commonly applied in camera-trap studies. Data were collected in northern Minnesota, USA, between 2016 and 2018 (23 337 active trap-days). We compared responses to: 1) two different survey-design frameworks (random- versus road-based), 2) two different lure types (salmon oil versus fatty acid scent oil), 3) two different placement strategies (completely random versus randomly-selected sites with feature-based placement), 4) survey timing (spring versus fall) and 5) temporal trends in daily encounter probabilities. Our results show that even species morphologically and taxonomically similar respond differently to survey-design strategies, and, thus, species-specific responses to design choices should be carefully considered in camera trap studies focused on multiple species.Minnesota Department of Natural ResourcesWildlife Restoration Program (Pittman- Robertson)Iannarilli, Fabiola; Erb, John; Arnold, Todd, W; Fieberg, John R. (2020). Data, R Code, and Output Supporting: Evaluating species-specific responses to camera-trap survey designs. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/97b4-jh36
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
Mice on the move: on the perceptual range of three rodent species in highly fragmented agricultural landscapes
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
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
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