1,721,126 research outputs found
Weapon and ammunition disposalWeapon and ammunition disposalReduction of pollutants generated from combustion of energetic material
No full textIn the last few years we have seen on an international level an increase in the activity of war material destruction, both of conventional and special type. This was mainly due to international accordance in the matter, obsolete explosive ordinance, or sequestered material. The degree and size of these different types of materials, their danger due to hazards of explosion and fire and security involved, leads to putting their polluting properties second hand.
The work refers to the technology that we adopted in a new EOD (Explosive Ordinance Disposal) facility with safeguards to the environment, and the results obtained during tests done for optimization of the depuration system for the fumes of the combustion of energetic material. In the combustor we got formation of high specific quantity of nitrogen oxide, along with carbon dioxide, and small molecular weight organic compounds. It was confirmed that with proper plant and operational condition, different pollutants can react together reaching a high level of auto depuration
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
Environmental analysis by GC. estimation of error in quantitative determination from multicomponent chromatograms
No full textA chemometric approach is described to estimate the error in quantitative determination from multicomponent chromatograms.
The methos is pllied to GC signlas from nvironmental analysis
Critical loads for Cd and Pb in the province of Bologna
No full textAtmospheric deposition represents a significant source of heavy metals entering soil and aquatic ecosystems. The evaluation of their vulnerability can be carried out by the Critical Load criterion. In this work we focus the attention on the terrestrial ecosystems in the Province of Bologna, estimating the maximum tolerable load of cadmium and lead they are able to bear without sustain the occurrence of harmful ecotoxicological effects. To this aim the Steady-State Mass Balance method is applied on a small scale (10x10 Km EMEP grids) and the more suitable approach to define critical limits for the Province condition, effect-base or stand-still, is discussed. The opportunity of simplifying the input data collection is also considered, trying to deduce soil properties from geological information. Finally, the environmental risk due to the present deposition of Pb and Cd on provincial soils is described as exceedances over the critical loads
Analisi comparativa di sistemi di trattamento rifiuti attraverso la metodologia LCA Life Cycle Assessment
No full textLo studio che viene presentato è una analisi di tipo comparativo tra due opzioni di trattamento di rifiuti provenienti dalla raccolta indifferenziata di rifiuti urbani mediante l'utilizzo della metodologia LCA. Per effettuare lo studio è stato utilizzato il codice di calcolo WISARD. Lo studio risponde alla necessità di valutare gli scostamenti tra i risultati ottenibili attraverso l'utilizzo di differenti strumenti software che implementano la metodologia LCA applicata a sistemi di gestione integrata dei rifiuti in accordo con lo standard ISO 14040. Sono stati confrontati due differenti scenari: Discarica con recupero biogas e Incenerimento con recupero di energia
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