1,720,954 research outputs found
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
Evaluation of Coir Pith Aging in Enhancing Expansion Ratios for Sustainable Land Use in Agriculture
No full textCoir pith, a byproduct of coconut processing, has gained prominence in sustainable agriculture due to its favorable water retention and aeration properties, making it an effective growing medium. One commonly held belief is that aging coir pith enhances its physical characteristics, particularly its expansion ratio (ER), which is crucial for plant growth. However, this practice of aging increases the demand for storage facilities, labor, and production costs, raising concerns about both economic viability and environmental sustainability. This study evaluates the impact of short-term aging on the expansion ratio of coir pith to determine whether non-aged or minimally aged coir can be used as an alternative, reducing costs while maintaining its effectiveness. The objective of this study is to determine the variation in expansion properties of coir grow bags with respect to the aging duration of coir pith. The research investigates three treatments of coir pith: non-aged (T1), two-month aged (T2), and four-month aged (T3). The expansion ratio was calculated as ER=(V1-V0)/V0, where V0 is the initial volume and V1 is the final volume after expansion. Data were subjected to statistical analysis (ANOVA) to determine whether significant differences existed between treatments. The results indicate that there were no statistically significant differences between the expansion ratios of non-aged and aged coir pith. These findings suggest that aging coir pith for two to four months does not lead to substantial improvements in its expansion ratio. Consequently, non-aged or minimally aged coir pith can be utilized in agriculture without compromising its performance as a growing medium. This has important implications for sustainable land use in agriculture, as reducing the need for aging lowers the costs associated with storage, labor, and production. Moreover, adopting non-aged coir pith contributes to more resource-efficient and environmentally sustainable agricultural practices. In conclusion, the study shows that aging coir pith for short periods does not significantly enhance its performance. The use of non-aged coir pith can therefore promote more sustainable agricultural systems by reducing operational costs while maintaining the effectiveness of the growing medium. Further research on long-term aging is recommended to explore any potential benefits that may arise from extended aging periods.
Keywords: Coir pith aging, Expansion ratio, Sustainable agriculture, Growing medium, Resource efficienc
Economic and Environmental Sustainability of Oyster Mushroom (Pleurotus ostreatus) Cultivation using Agro-Industrial Waste Substrates
No full textThe increasing global demand for sustainable agricultural practices has led to a growing interest in oyster mushroom cultivation using agro-industrial waste substrates. These substrates, such as mango sawdust and coir dust, provide a low-cost cultivation medium while addressing the issue of agricultural waste disposal. This study evaluates the economic and environmental sustainability of using these waste materials for oyster mushroom (Pleurotus ostreatus) cultivation. The objectives include assessing the effects of different mango sawdust and coir dust ratios on mushroom yield and growth, analyzing the economic feasibility based on production costs and benefit-cost ratios, and exploring how the use of these waste substrates can reduce reliance on non-renewable materials and minimize waste. The experiment involved five treatments with varying ratios of mango sawdust and coir dust: T1 (100% mango sawdust, control), T2 (75% mango sawdust, 25% coir dust), T3 (50% mango sawdust, 50% coir dust), T4 (25% mango sawdust, 75% coir dust), and T5 (100% coir dust). Key measurements included mycelium growth time, primordia initiation, substrate weight loss, mushroom yield (cap diameter, fresh weight, dry weight), and benefit-cost ratios. Environmental benefits were evaluated through waste reduction. Data were analyzed using ANOVA to determine significant differences between treatments. The results revealed significant differences across the treatments, with T3 (50:50 mix of mango sawdust and coir dust) showing the most favorable outcomes. T3 exhibited the shortest mycelium growth and primordia initiation times, the highest substrate and fresh weights, and the best cost-benefit ratio, making it the most economically viable option. T2 and T3 also produced the largest cap diameters and highest dry weights. In contrast, T5 (100% coir dust) showed less favorable results for most parameters. The findings highlight that a balanced combination of mango sawdust and coir dust not only optimizes mushroom yield but also enhances economic returns and environmental sustainability. Reusing agro-industrial waste materials reduces production costs and environmental pollution, while promoting sustainable agricultural practices. The study demonstrates the potential of oyster mushroom cultivation using waste substrates as an economically and environmentally sustainable solution. Further research is encouraged to optimize substrate mixtures for different mushroom species and explore other agro-industrial waste materials for broader application.
Keywords: Agro-industrial waste, Economic and environmental impact, Oyster mushroom, Sustainabilit
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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