1,720,983 research outputs found
The management of industrial safety in chemical and petrochemical industry by comparing costs and benefits
No full textCost–benefit analysis approach for the management of industrial safety in chemical and petrochemical industry
No full textComparing consequences of different liquid tank explosions triggered by lava inundations
No full textNatural disasters can cause several acci
dents affecting the integrity of industrial facilities and lifelines, the so-
called natural-technological accidents or simply Na-Techs. Amongst several volcanic hazards, lava flows
appear less dangerous for human life than other phen
omena and their impact on structures, traffic and
communication are even also more manageable, becau
se the slow movement of these streams allows
mitigation strategies to be employed. Neverthele
ss, in 2002 two Italian newspapers reported about an
explosion due to a boiling liquid expansion inside a civil tank (BLEVE), which was triggered by thermal
radiation produced by a lava flow, during an effusive
eruption of Mt. Etna. BL
EVEs are amongst the most
severe accidents that could occur in chemical and proc
ess industry as well as in the storage of hazardous
materials; as an example the result
of the previous mentioned explosi
on was a number of 32 injured people.
This accident highlighted a lack of these scenarios reported in the local emergency plans. To allow improving the emergency management, the present work compares the potential damage scenarios associated with different liquid tanks (containing water and fuel) used in civil activities and triggered by lava inundation
Uncertainties in QRA: Analysis of losses of containment from piping and implications on risk prevention and mitigation
No full textQuantitative Risk Assessment (QRA) is commonly used in the chemical industry to support decision-making. Common practices are based on standard methods, such as fault tree, event tree, etc.; in this frame, risk is a function of frequency of events (probability) and associated consequences (negative outcomes), but relevant uncertainties often are not properly taken into account in the derived results. This paper presents the application of an extended risk analysis of loss of containments for a case-study with the following aims: firstly, the uncertainties related to the results of the analysis, which derive from assumption in the application of the standard models, are qualitatively assessed; secondly the application allows evaluating the impact of the uncertainties on the trustworthiness of the results and, finally, commenting about their use in the risk prevention and mitigation. © 2015 Elsevier Ltd
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Ageing and creeping management in major accident plants according to seveso III directive
No full textThe focus of this paper is the management of critical equipment ageing within the context of lower and upper tier Seveso process plants, with a peculiar insight into the effectiveness of safety management systems in setting-up reliable procedure for critical element identification. Recent research studies in fact evidenced that in Europe nearly 50% of major 'loss of containment' events, arising from technical plant failures, were primarily due to ageing plant mechanisms such as erosion, corrosion and fatigue. The critical ageing elements should be included in maintenance, inspection and periodic monitoring programs in relation to their reliability, as assumed in the risk assessment and their lifetime or frequency ranges, based on their operational experience. This paper will accurately discuss how the issue of ageing is currently handled in the process industry. The methodology builds on the critical results of actual findings from the inspections on the safety management systems of major accident plants, which were performed by a working group. The primary objective is to stimulate the introduction of effective ageing management changes into the safety management of companies, by taking advantages of findings of the previous assessment and establishing proper and effective audits
Variations on the Author
No full text“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
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