1,721,085 research outputs found
Déclin et renaissance de la culture francophone dans le monde : état des lieux et développements prévisibles
No full textFormalized Approach in Prevention through Design and Detailed Definition of the Input Data on the Basis of Occurred Accidents: Some Experiences at Italian Extractive Activities
Full text linkThe paper deals with the principia and results of a formalized approach in Prevention Through Design applied to a number of North Western Italian extractive activities. The goal of an effective occupational Risk Analysis and Management, coherent to the national enforcements of the European safety
regulations for the exploitation plan and development, nvolves a pro-active approach. The statistical data confirms in fact that the extractive activities should be considered with special care, due to the impressive figures of work related accidents (in number and seriousness), and of the health
impairments associated with the presence of quite noxious pollutants at the workplaces.
Taken into account on one hand the impressive developments in the geotechnics – geomechanic sciences, and in the mining techniques and technologies, and on the other hand the results of the recent epidemiologic surveys, in particular with reference to the possible criticality of the silica dust, a Prevention through Design approach appears to be the only solution to correctly manage the substantially modified overall safety situation.
Obviously, the availability of reliable input data drawn from occurred accidents is essential for the development of an exhaustive Risk Analysis and Management in the Prevention through Design proactive approach. To overcome the physiological limits to the work related accidents available
databases, and to get detailed information on the chain of intermediate events up to the root causes laying at the very base on an accident, a special technique was developed, useful also to pinpoint the safety measures necessary to prevent the accident. The characteristic of the technique and the possible results are discussed, together with the possibilities and advantages of its implementation in a
computer assisted tool
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
Hemp (Cannabis sativa L.) seed oil obtained by extraction process with supercritical and liquid CO2.
No full textINTRODUCTION
Hemp seeds contain up to 35% of oil that can be extracted with solvents or cold pressure The aim of
this study was to evaluate and compare two innovative and environmentally friendly oil extraction
techniques using supercritical and liquid CO2.
METHODS
The supercritical CO2 extraction was performed at a temperature of 40 °C and a pressure of 300
bar, while the liquid CO2 extraction at a temperature of 20 °C and a pressure of 150 bar. Both
extractions were carried out with a CO2 flow of 10 mL/min and for a time of 195 min.
Peroxides value, spectrophotometric indices (K232; K270), polyphenols, chlorophylls and
carotenoids content, fatty acids and triglycerides composition, phytosterols composition, α and γ
tocopherols content, cannabidiol (CBD) and cannabinol (CBN) content, DPPH radical scavenging
activity and volatile compounds were determined in by means of high-performance liquid
chromatography, gas-chromatography and spectrophotometry the extracted oils.
RESULTS
The oil yield obtained with supercritical CO2 (30.98 ± 1.02 g oil/100 g seeds) was higher than that
obtained with liquid CO2 (16.99 ± 0.10 g oil/100 g seeds). The CO2 showed greater selectivity
towards compounds such as polyphenols and cannabinoids compared to the hexane. The hemp seed
oil obtained with carbon dioxide showed a higher content of polyphenols and cannabinoids, lower
values of peroxides and spectrophotometric indices and a good antioxidant activity compared to oil
extracted with hexane. At the end, aldehydes which give the characteristic aroma of green, spicy
and dried fruit, have been found only in the oils extracted with CO2
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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