1,720,966 research outputs found

    A methodology to support decisions towards economic and environmental sustainability in public contexts: Application to hand-drying options

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    Different hand-drying methods entail different costs and impacts on humans and the environment. This paper presents a methodology to facilitate the decision on the convenience of installing electrical hand driers in place of the conventional toilet paper towels in the restrooms of public places. Specifically, a procedure including both economic and environmental aspects is proposed and the Monte Carlo method is employed to account for the several uncertainties of all the variables involved. From the economic point of view, the number of daily usages of restrooms results as the key variable determining if one option is preferable to the other. From the environmental point of view, the carbon footprint was calculated for four scenarios considering two options for the electric energy grid mix and two options for waste treatment. The comparison between the four scenarios revealed that hand driers may be preferable to paper towels when the waste treatment alternative is landfilling. The results are more uncertain when the waste treatment option is incineration. The integration of economic and environmental aspects reveals as a useful strategy to fully assess the convenience of choosing one option rather than another, without limiting the decision to only one aspect. Additional information on processes and logistics are anyway necessary to reduce the uncertainties of the results.Different hand-drying methods entail different costs and impacts on humans and the environment. This paper presents a methodology to facilitate the decision on the convenience of installing electrical hand driers in place of the conventional toilet paper towels in the restrooms of public places. Specifically, a procedure including both economic and environmental aspects is proposed and the Monte Carlo method is employed to account for the several uncertainties of all the variables involved. From the economic point of view, the number of daily usages of restrooms results as the key variable determining if one option is preferable to the other. From the environmental point of view, the carbon footprint was calculated for four scenarios considering two options for the electric energy grid mix and two options for waste treatment. The comparison between the four scenarios revealed that hand driers may be preferable to paper towels when the waste treatment alternative is landfilling. The results are more uncertain when the waste treatment option is incineration. The integration of economic and environmental aspects reveals as a useful strategy to fully assess the convenience of choosing one option rather than another, without limiting the decision to only one aspect. Additional information on processes and logistics are anyway necessary to reduce the uncertainties of the results

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

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    “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

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    We 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
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