1,720,982 research outputs found
Genesi, cause e responsabilità della catastrofe della Val di Stava
No full textIl 19 luglio 1985, in piena stagione turistica, due invasi adibiti a discariche minerarie nell’alta Val di Stava (Comune di Tesero, Trentino) crollarono seminando morte e distruzione in questa verde vallata alpina. In totale 268 persone, fra residenti e villeggianti, persero la vita in quella che costituisce, per dimensioni e numero di vittime, la più grave catastrofe avvenuta in Italia a causa del collasso di rilevati arginali al servizio di miniere
Lessons learnt from the Sgorigrad and Stava disasters
No full textThe catastrophic failures of tailings dams at Sgorigrad (Bulgaria) and Stava (Italy) are analyzed, pinpointing the many similarities of the two cases. A description is given about the shortcomings in the construction of these geotechnical structures and the causes of their collapse. Further information is provided about the lessons learnt from these disasters and the activities carried out to keep memory alive and qualify young engineers and geologists on the proper and safe management of tailings dams
Safety of tailings dams – Post-university formation
No full textAfter a historical introduction regarding the origin, causes and responsibilities of the 1st May 1966 disaster in Sgorigrad and Vratza (Bulgaria) and the 19th July 1985 disaster in the Stava Valley (Italy), the Stava 1985 Foundation (a non-profit organization) expresses the hope that, starting from a common tragic experience, universities and research Institutions in Italy and Bulgaria will organize post-graduate courses for young graduates and technicians from mining societies and public administrations who are to be in charge of the safety of geotechnical structures and, in particular, of active and abandoned tailings dams in Europe and elsewhere in the world
An educational path to rediscover the history, the tools and the techniques for mining fluorite in the Prestavèl mine (Trento Province, Italy)
No full textThe Stava 1985 Foundation (a Registered Charity) is committed to keeping alive the “active memory” of the Stava Valley catastrophe, which was one of the worst mining disasters in the world. On 19th July 1985, 268 men, women and children were killed by a huge mudflow caused by the collapse of two tailings dams storing the waste of the fluorite concentration process at the Prestavèl mine plant located in the territory of the Tesero Municipality, on the southern slopes of Mt. Prestavèl in the Stava Valley, a side valley of the Fiemme Valley in Trentino, northern Italy. The memory of this tragic event aims to avoid such disasters happening again, so that these innocent victims did not die in vain. The goal of “active memory” is to improve the culture of safety, safeguard of the environment and correct and sustainable use of natural resources, which was lacking in Stava. Only this awareness and sense of personal accountability can avoid the repetition of similar, foreseeable and avoidable disasters. In order to maintain this active memory, proper information must be provided on the origin and causes of the Stava Valley disaster and the responsibilities involved. The Stava 1985 Foundation, which has made available a great deal of information and carried out several educational projects, aims now to investigate in depth the history, tools and mining techniques at the Prestavèl mine. Access to this knowledge will be made more available thanks to the implementation of an educational path inside the mine tunnels after they have been made safe and accessible to the public
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
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
Stava 1985 - Una documentazione
No full textIl volume descrive la storia della Val di Stava (TN) in relazione all'apertura della miniera di fluorite di Prestavel e alla costruzione dei bacini di decantazione dei residui minerari. Vengono poi descritte le cause della cronica instabilità dei rilevati arginali dei bacini che crollarono il 19 luglio 1985 causando la morte di 268 persone e la distruzione di gran parte di questa vallata alpina
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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