1,720,958 research outputs found
Fire prevention technical rule for gaseous hydrogen transport in pipelines
No full textThis paper presents the current results of the theoretical and experimental activity carried out by the Italian Working Group on the previous termhydrogennext termprevious termfirenext termprevious termpreventionnext term safety issues in the field of the previous termhydrogennext termprevious termtransportnext term in previous termpipelinesnext term [Grasso N, Ciannelli N, Pilo F, Carcassi M, Ceccherini F. previous termFirenext termprevious termpreventionnext termprevious termtechnicalnext termprevious termrulenext term for previous termgaseousnext termprevious termhydrogennext term refuelling stations. Proceedings of the International Conference on previous termHydrogennext term Safety, 8–10 September 2005, Pisa, Paper 420064]. From the theoretical point of view a draft document has been produced beginning from the Italian regulations in force on the natural gas previous termpipelinesnext term; these have been reviewed, corrected and integrated with instructions suitable to use with previous termhydrogennext term gas. From the experimental point of view a suitable apparatus has been designed and installed at the University of Pisa; this apparatus will allow simulations of previous termhydrogennext term releases from a previous termpipelinenext term with or without ignition of the previous termhydrogennext term–air mixture. The experimental data will help the completion of the above-mentioned draft document with the instructions about the safety distances. However, in the opinion of the Group, the work on the text contents is concluded and the document is ready to be discussed with the Italian stakeholders involved in the previous termhydrogennext term applications
Sicurezza degli Impianti di Distribuzione Idrogeno: Apparecchiatura Sperimentale HPBT per la Valutazione del Comportamento di Rilasci Accidentali
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Guidelines for Fire Corps Standard Operating Procedures in the event of Hydrogen Releases
No full textThis paper presents a study on the Standard Operating Procedures (P.O.S.s) for the operation of the
Fire Corps squads in the event of accidents with a hydrogen release, fire or explosion. This study has
been carried out by the Italian Working Group on the fire prevention safety issues as one of its main
objectives. The Standard Operating Procedures proved to be a basic tool in order to improve the
effectiveness of the Fire Corps rescue activity. The unique physical and chemical properties of the
hydrogen, its use without odorization and its almost invisible flame require a review of the already
codified approaches to the rescue operations where conventional gases are involved. However, this is
only the first step; a Standard Operating Procedure puts together both the theoretical and practical
experience achieved on the management of the rescue operations; therefore its arrangement is a cyclic
process by nature, always under continuous revision, updating and improvement
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
Sparber Fire corps standard operating procedures with hydrogen releases: harmonisation issues
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