1,721,043 research outputs found
Blight and ink disease as constraint factors in chestnut stands of Mediterranean and Central Europe
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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
Dealing with uncertainty, from overtourism to overcapacity: a decision support model for art cities: the case of UNESCO WHCC of Florence
No full textThis study analyses tourist flows in the UNESCO World Heritage Historic Centre of Florence before the occurrence of the COVID-19 crisis and examines how the pandemic has impacted the city. We build a system of indicators to measure the carrying capacity of art cities, assessing the risk exposure of these historic settings to overtourism. The model provides a detailed picture of the evolving tourism phenomenon and the economic, social, and environmental implications thereof. The indicators system supports local decision-makers in monitoring tourism flows and evaluating critical policies to preserve the destination heritage. It further examines the sustainable strategy implemented by the Municipality of Florence towards tourism recovery, as cities of art need to protect their cultural heritage and balance the needs of residents and tourists
Chiral surface waves for enhanced circular dichroism
No full textWe present a novel chiral sensing platform that combines a one-dimensional photonic crystal design with a birefringent surface defect. The platform sustains simultaneous transverse electric and transverse magnetic surface modes, which are exploited to generate chiral surface waves. The present design provides homogeneous and superchiral fields of both handednesses over arbitrarily large areas in a wide spectral range, resulting in the enhancement of the circular dichroism signal by more than two orders of magnitude, thus paving the road toward the successful combination of surface-enhanced spectroscopies and electromagnetic superchirality
Local field enhancement: Comparing self-similar and dimer nanoantennas
No full textWe investigate the local field enhancement in self-similar nanolenses and compare the obtained results with the performance of standard dimer nanoantennas. Despite the additional structural complexity, we conclude that self-similar nanolenses are unable to provide significant improvements over the field enhancement performance of standard plasmonic dimers
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
Assessment and characterisation of Turkish hypovirulent isolates of Cryphonectria parasitica (Murr.) Barr.
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