1,721,039 research outputs found
Pathological study on the Scutiocociliatosis of Japanese flounder (Paralichthys olivaceus) in Japan
No full text獣博甲第269
Pathological study on the Scutiocociliatosis of Japanese flounder (Paralichthys olivaceus) in Japan
Get PDF獣博甲第269号博士(獣医学)山口大学Yamaguchi Universit
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
Political Economy of the Wheat Sector in Egypt: Seed Systems, Varietal Adoption, and Impacts
No full textWheat has been an important food staple in Egypt from time immemorial and remains one of the most (if not the single most) important food security crops in the country. Currently, wheat provides one-third (35 percent) of the typical Egyptian’s total daily calorie intake. On average, the crop represents about 10 percent of the total value of agricultural production and about 20 percent of all agricultural imports, which depicts the country’s insurmountable food security challenge.
Over the last six decades, the wheat sector in Egypt has exhibited an increasing trend from 0.58 million ha with a productivity of 2.5 tons ha-1 and production of 1.44 million tons in 1961 to a high of 1.39 million ha, a productivity of 6.9 tons ha-1, and total production of 9.84 million tons in 2021. Despite these significant achievements, Egypt remains number one globally in terms of the volume and value of its wheat imports. The main drivers of the country’s increasing wheat dependency are rapid population growth, increased per-capita consumption, and other alternative uses of wheat. Cognizant of these facts, over the years, debate on Egyptian agrifood systems revolved around ‘wheat self-sufficiency’.
Anchored on three major pillars, several strategies have been developed for reducing dependency on imports of wheat: (i) expansion of area under wheat production; (ii) increased productivity per unit area through the generation and dissemination of new wheat varieties and associated technologies and innovations; and iii) reduction of demand for wheat by encouraging dietary diversification and replacing wheat with alternative grains in bread production. The Sustainable Agricultural Development Strategy Towards 2030 aspired to attain a wheat self-sufficiency level of 80.8 percent (i.e., wheat production of 15.1 million tons) by increasing wheat area to 1.76 million ha and productivity to 8.57 tons ha-1. Wheat self-sufficiency is expected to continue being the driving force shaping the future of wheat in Egypt. Against the backdrop of limited natural resources and climate change, it is imperative for the country to also explore alternative options to achieving self-sufficiency in wheat
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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