1,721,204 research outputs found
Geochemical properties of airborne particulate matter (PM10) collected by automatic device and biomonitors in a Mediterranean urban environment
No full textThe mineralogy and geochemistry (major and trace elements) of particulate matter collected from 14 April to 29 May 2003 by automatic device (PM 10) and entrapped by moss and lichen exposed in bags in a monitoring site of Naples urban area were studied with the aim to obtain useful information for risk assessment and control measures feasibility.
PM10 concentrations were generally above the threshold values fixed by the 1999/30/EC directive. Constant and low intensity winds enhanced re-suspension of fine particles and dispersion of gaseous pollutants. PM10 samples contained trace elements in relatively lower amounts compared to literature reports from other Mediterranean monitoring sites. Significant correlations between Al, Ca, Cu, Fe, K, Mg and Mn indicated that soil dust largely contributed to the accumulation of fine particles on filters and exposed mosses and lichens. Highly significant correlations were also found between Ni and V, indicative of oil combustion processes, Fe, Cu and Cr, indicative of vehicle emissions and mechanical components abrasion, and Na. and Mg, indicative of marine aerosols. Lead and Hg did not correlate significantly with any other element.
Comparison of element EFs, calculated with respect to the composition of Naples surface soils, indicated higher contribution of soil dust to PM and moss chemical composition compared with lichens, which in turn, according with their better preserved vitality, intercepted/absorbed more efficiently anthropogenic particles and elements of metabolic interest.
Crystalline and amorphous detrital components (quartz, calcite, feldspars, volcanic glass, mica, kaolinite and smectite) and sea-bearing salts phases (halite, gypsum, Mg-K sulphates, Mg-Ca carbonates) were the main minerals in PM10, along with silica fibers and tuff particles. (c) 2007 Elsevier Ltd. All rights reserved
Outcomes of aortopulmonary window repair in children: 33 years of experience
No full textAbstract not availablePhillip S. Naimo, Matthew S. Yong, Yves d, Udekem, Christian P. Brizard, Andrew Kelly, Robert Weintraub, and Igor E. Konstantino
Ontology that matters: Binding relations
No full textIn this paper I defend an \u27ontology of binding relations\u27 entailed in a critical examination of the concept of ‘being’ based on a new perspective of the human organism (though not exclusively) conceived as a Space-Time-Event-Motion (STEM) entity or containment-field of being. As such the paper serves to defend the viability of ontology by way of revising how we ought to engage in ontological thinking. Central to this analysis is to demonstrate what explanations can be deduced by examining what otherwise have remained disparate ontological categories such to enable a new view of two major metaphysical problems: the ‘problem of identity and persistence’ and associated ‘problem of composition’. As a result of this examination a candidate coupling formulation emerges to serve as a principle of individuation. Part of this analysis is to examine the nature of substance, the concept of energy, and to establish what is required to situate energy as one kind of primary substance.
Naimo, J. (2010). Ontology that matters: Binding relations. In P. Hanna (ed.), An anthology of philosophical studies, Vol. 5. (pp.261-272). Athens, Greece: Athens Institute for Education and Research
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
Submicroscopical and microanalytical characterization of airborne fine particles (PM10) collected by automatic device and entrapped by biomonitors in mediterranean urban environment.
No full text
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
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