1,721,071 research outputs found
Toxic industrial chemicals and civil protection. Methods of analysis for damage estimation as a result of accidental releases and not, export profiles and stockpiles of antidotes
Full text linkThe risk of accidents caused by the dispersion of hazardous chemicals is a real and ever- present risk. Leaks can occur in the transport phases of the leaks rather than as a result of accidental or caused industrial accidents. The European Union, through the application of product regulations (REACH, CLP, Biocide product and Plant Protection Product) aims to guarantee safe use of chemicals within the Union and with PIC Rgulations promotes the shared responsibility during the export dangerous chemicals ban or severely restricted in UE. The study of inhalation toxicity the substances listed in the PIC Regulation is therefore a fundamental element for predicting the damage to the exposed population. In order to quantify the damages, predictive methods were used to indicate the quantitative estimates of the damages, allowing, on the basis of the results, to hypothesize and update adequate stocks of antidotes. Attention has also been paid to the fight against ionizing radiation with the proposal of a kit to reduce the damage to the health of personnel possibly exposed. As a result, emphasis was placed on the risk of transporting Liquid Petroleum Gas (LPG) at low temperatures, in terms of the high risk of explosion and flammability. The risk of missing an update of the equipment of the advanced second level medication posts, which lack medicinal oxygen in their supplies, was highlighted. Substances with a high inhalation toxicity higher than some war weapons such as Soman, Sarin, Tabun and Vx have been identified, highlighting a risk both for operators in the sector and for the population possibly exposed. Export flows of PICs from Europe to other continents over the last 16 years were analyzed
Verifica mediante banco a flessione della misura di tensione residua, in superficie e a bassa profondità, con il metodo del foro
No full textIl metodo del foro per la valutazione delle tensioni residue è stato recentemente sviluppato e migliorato. La valutazione dell’accuratezza del metodo è quindi di notevole interesse. Tuttavia, la misura delle tensioni residue è, per sua natura, non facilmente verificabile. Nonostante siano disponibili in letteratura riscontri positivi con la misura ai raggi X, lo stato di tensione residua può essere poco ripetibile e quindi non si presta ad una verifica di estrema accuratezza. L’utilizzo di un banco a flessione, invece, permette di simulare (come tensione residua) una tensione monoassiale, nota con elevata precisione. Nel presente lavoro, il metodo è stato verificato con successo. Inoltre, è stata verificata l’opportunità di selezionare frese di foratura con fondo piatto, in modo da migliorare la misura nei primi passi di foratura e quindi la previsione delle tensioni residue vicino alla superficie, dove la valutazione è di maggiore interesse
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
Treatment of superficial and profunda femoral artery bifurcation lesions: still a procedure only for surgeons?
No full textAppropriate 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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