1,721,280 research outputs found
Sustainable food supply chains – Emerging technologies and strategies toward low-carbon ecosystems
No full textOverall, this special issue of the Journal of Cleaner Production purports to collect emerging decision support models and tools for planning and design sustainable food supply chains, but also to connect to advanced technology able to embrace environmental and social sustainability as leading pillars of integrated food supply chain ecosystems. Considering the size of the sustainability challenge, much work remains to be done to work towards an ecosystem heavily intertwined to climate issues and dependent on natural resources. This ambitious challenge requires increasingly more holistic and multi-disciplinary perspectives on emerging technologies and strategies toward low-carbon ecosystems
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Studying agri-food supply chains: an analytical framework
Full text linkAgri-food supply chains have unique characteristics and challenges for which we need an appropriate analytical framework. In addressing these issues, we first discuss agri-food supply chain characteristics, after which we provide a framework for designing agri-food supply chains. The chapter also provides a quick overview of the structure of the rest of the book
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Understanding and improving global agri-food supply chains in an interconnected world: a systems approach
Full text linkAgri-food supply chains (AFSCs) are complex, interconnected networks that span the world, yet they are highly influenced by regional contexts, as the chapters from this book have illustrated. From large-scale farming in countries like the United States to small and medium-sized farmers in Latin America and Africa, each region presents its own set of challenges and opportunities. These do not only result from regional environmental conditions but also political, economic, social, technological, and regulatory aspects. Using the framework introduced in Chapter 1, this closing chapter synthesizes the content of this book by differentiating between the managed system, the managing system, and the information system to provide an understanding of AFSCs across the world
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
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