1,721,122 research outputs found
An application of ARIPAR methodology to manage the risk and the environment impact in the industrial area of Gela
No full textThis paper is focused on safety and environmental issues and analyses the problems connected
with chemical processes and the transport of hazardous goods.
During recent years incidents in chemical plants have shown that there are serious problems regarding their
reliability, safety and environmental impact. Great attention is now paid to the serious risks associated with
industrial processes, the transport of hazardous substances and the storage of fuels and chemicals.
The aim of this work is to study the safety and environmental problems associated with the industrial activity
in the area of Gela. In order to evaluate the risk connected by sea and land transportation of hazardous materials
and to chemical processes in the industrial area of Gela the methodology of Quantified Area Risk Analysis
has been applied.
A complete inventory of dangerous substances, was the basis of a complete risk analysis, whose results, obtained
by means of the ARIPAR-GIS code, have been analysed and discussed.
The results data shows that the major contribution to the risk is due to the sea and land transport of ammonia.
The impact of ammonia dispersion can involve highly populated areas of the city of Gela and this paper aims
to find suggestions to manage the risk connected with ammonia transport
Calori Specifici, Volumi e solubilità del Pentanolo in Soluzioni Acquose di Cloruri di Dodecilammonio, Dodecildimetilammonio e Dodeciltrimetilammonio
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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
Risk analysis of the transportations of hazardous materials in urban areas
No full textThe study of the problems associated with the transportation of dangerous goods must be considered to be as important as that connected with the risks associated with chemical plants.
Accidents in the transportation system may occur in environments which are not sufficiently well controlled or protected such as areas of high population density or of natural and historical beauty.
Sicily with a very high concentration of chemical plants is an area with a great risk of accidents. The peculiarity of chemical and refining industry is the presence of very large chemical plants located in the eastern side of the region (Priolo, Augusta Gela and Milazzo) accompanied by the almost total absence of small and medium enterprise operating in the chemical area. About the 90% of chemicals produced in Sicily are transported to the chemical industry located in the North of Italy. As a consequence, in this region, there are urban areas subject to an intense traffic of hazardous materials.
In this paper the risk analysis of land transport of hazardous materials in the area of the straits of Messina is outlined.
The area which is the object of this study is the city of Messina, which has a population of approximately 280,000 inhabitants; its geographic position confers it the role of ‘door of Sicily’ for all the connections with the Italian peninsula which go through it. Since the downtown has developed around the harbour, the road network between the highway exits and the ferry terminals cross densely populated areas and zones of intense commercial activity. Fig. 6 shows schematically the situation.
There are four highway slip roads for entering the city (Boccetta, Centro, Gazzi and Tremestieri) and two ferry terminals, one operated by the National Railway Service and one operated by private companies; the principal highway sliproad, Boccetta, reaches the sea between these two terminals. The use of the other sliproads, Centro and Gazzi, is sporadic because they have a larger travelling time due to high commercial traffic. About 22,500 trucks per year of dangerous goods are directed to the Italian Peninsula; in addition approximately 800,000 other heavy lorries and 2,500,000 cars cross yearly the Straits of Messina. In addition Messina is an earthquake zone.
For a careful evaluation of both individual and societal risk a detailed analysis of a census data is necessary, in order to define, among others, the hazardous materials traffic flows, the population distribution, and the meteorological conditions.
An innovative procedure for risk estimation is applied to Messina. Both individual and societal risk relevant to transport of hazardous materials have been estimated.
A careful analysis of the annual rail and road transport of hazardous materials coupled with a determination of the population density of the urban areas traversed has been made.
Some scenarios have been identified and the analysis of the consequences was carried out using the TRAT code developed by the University of Bologna.
The results obtained permits the evaluation of the global risk relevant to the transport of chemical products.
An appropriate transport risk analysis makes it possible to propose a code of practice and law in order to minimise the frequency of incidents based on the diversification of the transportation system, the use of alternate routes and suitable procedures for the loading and discharging hazardous materials
A quantitative methodology for risk assessment of explosive atmospheres according to ATEXDirective.
No full textThe Directive 99/92/EC (ATEX 137) deals with the safety and health protection of workers potentially exposed at explosive atmospheres. The application of the ATEX Directive requires the assessment of specific risks due to the presence of potentially explosive atmospheres. The potential development of explosive atmospheres is generally typical of industries classified at major hazard, but it is also possible in other industries where flammable materials are handling. Since the assess of the risk due to the formation of explosive atmospheres is required in both the cases and it is fundamental for the safety in the workplaces, a quantitative approach has been proposed. The objective of the paper is to describe the main aspects of a quantitative methodology based on a probabilistic risk assessment starting from a detailed knowledge of the analyzed system
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
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