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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
Variations 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
The research project and partners involved
No full textIn this chapter the authors introduce how fires in tunnels can be studied using CFD models, explaining the reasons behind the research project and the importance to perform full-scale fire tests in order to better understand and investigate these events. Finally, the subjects involved in project (Politecnico di Milano, Corpo Valdostano dei Vigili del Fuoco, RAV—Autostrade Spa) are presented
The test results
No full textIn this chapter are presented the experiments and experimental measurements obtained in the two full-scale fire tests performed in the Morgex North tunnel, where both the HRR and ventilation velocity were measured as a function of time. It is initially described how the fire scenarios were designed and operated, then the obtained experimental results are presented and compared to the numerical predictions of CFD simulations of the same fire scenarios. In this chapter the discussion is initially focused on the comparison with analytical models and empirical correlations based on theoretical analysis and literature measurements obtained in other tunnel fire tests. The Morgex fire tests allowed to collect different measurements (temperature, air velocity, smoke composition, pollutant species) useful for validating and improving new and existing CFD codes and for testing the real behaviour of a tunnel and its safety systems during a diesel oil fire with a significant Heat Release Rate (HRR)
Safety in road tunnels
No full textThis chapter briefly presents the main issues related to the safety inside road tunnels. Fires, events with potentially catastrophic consequences within these infrastructures, are concisely introduced
The fire tests in the morgex north tunnel
No full textAfter presenting the Morgex North tunnel, location of the full-scale fire tests, the choices made for the implementation of the fire test, made up by two fire scenarios, are deeply described. The idea of this part of the book is to give possible stakeholders useful suggestions in order to guide them in the preparation of a similar experience. Indications are given about fire scenarios and their preparation, safety issues, materials and equipment, preparation and location of measuring instruments
Conclusions
No full textIn this book new full-scale tunnel fire experimental results are presented and discussed. The tests took place in the Morgex North tunnel of the A5 highway (Italy). The first part of the book describes how to set up full-scale fire tests inside an existing tunnels. Indications are given about fire scenarios and their preparation, safety issues, materials and equipment, preparation of tunnel sections and measuring instruments
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