1,720,961 research outputs found
Sperimentazione di metodologie di monitoraggio ambientale al fine di prevenire il rischio da contaminanti chimici e radioattivi in casi incidentali,
No full textI processi di esercizio di impianti industriali e nucleari, comportano rilasci in ambiente di effluenti liquidi ed aeriformi, che
vanno ad influire sulla vocazione del territorio e salute della popolazione. La legge italiana, disciplina le modalità di
limitazione del rilascio di contaminanti nell’ambiente e le analisi dell’inquinamento da essi prodotto; per le emissioni di
origine radioattiva, la normativa tiene conto delle prescrizioni internazionali, basate su sperimentazioni sul campo ed ampi
studi epidemiologici analitici, da parte dell’Agenzia Internazionale per la Ricerca sul Cancro (IARC) e l’Organizzazione
Mondiale della Sanità (OMS), che correlano l’effetto, incidenza o mortalità oncogena, all’esposizione a radiazioni ionizzanti.
In Italia, i controlli di tipo “a monte” e “a valle” fanno parte del programma di sorveglianza ambientale: consistono nella
verifica del rispetto dei limiti di rilascio autorizzati e in un vero e proprio programma di monitoraggio delle matrici ambientali
ed alimentari, tramite analisi chimiche e radiometriche. La rete di sorveglianza è gestita da APAT, cui spetta il compito di
analizzare le principali vie critiche della radioattività nell’ambiente e sulle catene alimentari, acquisire dati di riferimento da
utilizzare in situazioni di emergenza, approvare o eventualmente modificare quanto previsto dai modelli di calcolo impiegati
per le valutazioni d’impatto ambientale dovuto a rilasci in atmosfera ed acque superficiali. Oggetto del presente lavoro è uno
studio parametrico dell’influenza di inquinanti radiochimici, tipici di siti industriali e nucleari, sull’ambiente circostante,
analizzando le condizioni al contorno e modelli fisici che favoriscono la contaminazione dell’habitat, antropico e costruito
Environmental protection by a framework code for risk analysis
No full textAll activities about treatment and management of radioactive wastes, modalities of limitation of their releases into the environment, are disciplined in Italy by Decree 230/95 and its integrative modifications. Environmental questions are really difficult to solve because of the complicated relationships among many contributing factors, both natural and man-made. Each nuclear installation must manage and check up its own environmental surveillance net-work, thanks to which it is possible to examine the main critical pathways of the radioactivity in the environment and food chains. APAT verifies, approves and acquires all reference data from this environmental network in order to use in anomalous situations, to confirm or eventually to modify previewed results by mathematical models, that are been employed for the evaluation of the concentrations in the environmental matrices and doses to the critical groups, in consequence of radioactive releases. The purpose of this work is to characterize, through dynamic models, typical scenes about areas interested in industrial and nuclear power plants. It has been possible to estimate the release and transport of the chemical elements throughout the environment, and to predict associated exposure and risk, using a framework software developed by Pacific Northwest National Laboratory for EPA (U.S. Environmental Protection Agency). The characterization of the area on which the structure insists, built up environment, population and vocation of the territory, contributes to the punctual analysis and allows to estimate and to prevent the risk from sources of ionizing radiations
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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