1,720,979 research outputs found
Applicazione della logica fuzzy al metodo ad indici per la valutazione del rischio di incidente rilevante
No full textIl rischio di incidenti rilevanti e l’evoluzione tecnologica degli impianti conseguente all’adeguamento alle direttive europee in materia ambientale
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Optimized planning and scheduling of pressure equipment inspections at COMAH establishments,
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Impact of an ambient dust cleanup plan on an industrial site
No full textIn an industrial city, an ambient air cleanup plan had been prepared to control fugitive dust emissions affecting urban area and local community. This paper presents a study of airborne dust before and after cleanup. Before performing the plan, an ambient dust survey had been carried out to mark the affected areas, to single out major emission sources and to predict benefits of the actions planned. After cleanup, actual effects monitored for a 1-year period have been verified in good accordance with those expected
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
Turbulent hydrogen deflagration induced by ostacles in real confined environment
No full textThe CVE (Chambre View Explosion) is an experimental facility owned by the DIMNP at the University of Pisa “Scalbatraio” laboratory to study the confined vented explosion phenomena in real environments. The CVE is a cubic apparatus of 25 m3, equipped with two glass walls that enable to video record the explosion and the flame expansion, and the relevant path. The experimental campaign and the results here presented were focused on the investigation of the turbulence induced by obstacles on the vented deflagration for homogeneous conditions of concentration. For this purpose two sets of obstacles constituted by plates were designed and put inside the apparatus.
Besides the experimental activities, also a modelling work has been carried out with the CFD code FLACS V8.1 (FLame ACceleration Simulator) in order to predict and reproduce the turbulent confined hydrogen vented explosion. A comparison between the experimental video recorded data and the same data reproduced through the CFD simulations is presented
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