1,721,022 research outputs found
Metodologie geo-topografiche integrate per l'acquisizione e l'analisi di dati di deformazione. Progetto di ricerca: Rilevato sperimentale per il modello geotecnico del sottosuolo della laguna di Venezia.
No full textWindthrown elements: a key point improving microsite amelioration and browsing protection to transplanted seedlings
No full textMountain forest dynamics and ecosystems services are critically influenced by disturbances, in particular storm events. After extensive disturbance, the large amount of deadwood lying on ground and the necessity for restoring the forest cover with natural regeneration are two critical issues to be dealt with. Salvage logging is the most common post-disturbance management strategy, but it does not consider the strategic role of coarse woody debris (CWD) in favoring regeneration establishment and survival. The aim of this study is to analyze how CWD contributes to creating favorable microsites for regeneration, increasing seedling establishment probability, after a large windthrow in the eastern Italian Alps. We focused on two different facilitative mechanisms provided by CWD, microsite amelioration and seedling protection, by planting a set of seedlings in the surroundings of deadwood elements. The former mechanism was analyzed by measuring temperature and SWC (Soil Water Content) locally, while for the latter we recorded evidence of browsing at the end of the season. For each trial, we established control sites in empty areas nearby with no CWD presence in order to infer its contribution. The results show that north-facing microsites on south-exposed slopes offer significantly lower temperature and fewer water stress for saplings, in comparison to south-facing microsites. More in general, saplings on deadwood-mitigated microsites are less exposed to desiccation, which mitigates the transplanting shock and facilitates the establishment. Moreover, the presence of lying deadwood increases roughness and, as a consequence, the cost for browsers to reach the seedlings. Using a coefficient expressing this increment, we underline the significant protective effect of CWD against deer browsing. The results of our study highlight the importance of deadwood in providing favorable regeneration microsites, enhancing the probability of sapling establishment and survival, protecting them from deer browsing
VARIABILI CORRELATE ALLE MODALITÀ DI ATTUAZIONE DI UN GESTO SUICIDARIO: SESSO, ETÀ, MOTIVAZIONI
No full textSeedless ultrafast source-device independent quantum random number generator
No full textWe present a new source-device-independent protocol for quantum random number generation valid for arbitrary POVM. We experimentally implemented it using heterodyne detection reaching more than 17 Gbps of secure generation rate
Is deadwood helping regeneration? Natural regeneration dynamics in a stand replacing windthrow area
Full text linkGoing 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
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