1,721,009 research outputs found
Removal of emerging contaminants from water and wastewater by adsorption process.
No full textEmerging contaminants are chemicals recently discovered in natural
streams as a result of human and industrial activities. Most of them have no
regulatory standard and can potentially cause deleterious effects in aquatic life at
environmentally relevant concentrations. The conventional wastewater treatment
plants (WWTPs) are not always effective for the removal of these huge classes of
pollutants and so further water treatments are necessary. This chapter has the aim
to study the adsorption process in the removal of emerging compounds. Firstly,
a brief description of adsorption mechanism is given and then the study of
conventional and non-conventional adsorbents for the removal of emerging
compounds is reviewed with the comparison between them
PAHs in Water Environment: A Survey of Occurrence and Removal in Wastewater Treatment Plants
No full text
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
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