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Comparison between the results of a new version of the AVACTA II atmospheric diffusion model and tracer experiments
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An integrated procedure for determining heavy metals concentrations in air particulate and in biomonitors
No full textThe aim of study is to assess a calibration procedure for utilising some vegetal species as biomonitors in an integrated monitoring network.
We compare heavy metals concentrations in the atmospheric participate collected on filters with the ones on vegetal samples.
The sampling and the mass measurement of the atmospheric paniculate are performed by means of a low volume p-gauging sampler.
For heavy metals biological monitoring, we have chosen two ryegrass species and we have developed a standardised culture cycle in which cultivation pots containing Lolium italicum and Festuca arundinacea are prepared. For evaluating heavy metals concentration we have utilised AAS techniques. Here we discuss the data collected in the first field survey (1997
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
Pollutant diffusion model and GIS integration procedure for evaluating atmospheric emissions in industrial areas.
No full textThis work presents a methodology off-the-shelf to characterise, in industrial zones, high level ground pollutant concentrations areas in order to optimise the monitoring network system location and point out interesting pollutants, parameters and the others meteorological information, to evaluate the pollutants diffusion in atmosphere and their soil impacts, e.g. Kainumaf [1].
This methodology has been oobtained by integrating the pollutant transport model and the Geographic Information System. In particular, the chosen air quality model is the Rough Terrain Diffusion Model (E.P.A. model) able to estimate ground level concentration in complex terrain near one or more co-located indusatrial source
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
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