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Performance of membrane separation bioreactor at various temperatures for domestic wastewater treatment
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Biodegradation of plastic wastes under semi-aerobic condition with active methane oxidation activities and nutrient supply
No full textElimination of plastic waste deposition in landfills is essential to avoid secondary pollution such as microplastics. Under appropriate environments, methanotrophs which proceed through methane oxidation reaction are capable of degrading plastics via their co-metabolisms. Nevertheless, nutrient conditions in landfills to promote methane oxidation and plastic degradation are still unclear. Therefore, the biodegradation of plastic wastes under semi-aerobic conditions with methane oxidation activities and nutrient additions was examined in this study. Various types of plastics (HDPE, LDPE, oxo-degradable plastics) were exposed to methane and air under semi-aerobic conditions in lysimeters where methanotrophic activities were promoted. Nitrate and phosphate and their combination were introduced into waste mixtures to determine their effect on plastic biodegradation. Changes in gas compositions, plastic weight losses, by-products, and microbial consortium were studied. Phosphate supplement resulted in higher methanotrophic population, particularly that of type I (Methylococcus sp., Methylocaldum sp., Methylovorus sp., Methylomonas sp., and Methylobacter sp.) and yielded highest biodegradation for oxo-degradable (15-20%) followed by HDPE (15-19%), and LDPE (4–7%). The plastic degradation was found well correlated to methane oxidation rate. Oppositely, nitrate supplements reduced MOR due to their competition with oxygen for microbial reactions. Semi-aerobic condition with a phosphate supplement is found effective in promoting plastic degradation in landfills
Performance of soil and compost mixture in leachate purification at intermediate cover soil of tropical landfill
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