1,720,960 research outputs found
Double Transplanting: Economic Assessment of an Indigenous Technology for Submergence Avoidance in the Flood-Prone Rice Environment in Bangladesh
Get PDFIn the northern part of Bangladesh a large proportion of land is medium and low-lying which are subjected to the risk of flooding from heavy rains during the month of August and September. Consecutive days of heavy rains after the crop establishment causes flash floods leading to death of seedlings and additional costs for re-transplanting. In response to this environmental problem, farmers practice a system of double transplanting of rice, locally known as Bolon to avoid crop failure from submergence. One-month old seedlings are transferred to another field with dense transplanting, and then re-transplanted to the main after the risk of flash flood is over. Scientists argue that the system would have lower yield and higher costs, thereby lower profits compared to single transplanting, but farmers disagree. The purpose of this study was to assess economic performance of the Bolon system compared to the normal transplanting. Primary data were generated from 200 farmers drawn randomly from five sites to test the hypothesis that Bolon is less profitable and technically less efficient method of crop establishment compared to single transplanting. A stochastic frontier production function model was used to measure the difference in technical efficiency of the two systems. Results show although rice cultivation through Bolon involved higher cost particularly for double land preparation and transplanting of seedlings, but rice yield as well as net return was higher compared to single transplanting. The estimate of tech nical efficiency shows the farmers practicing the Bolon system are more efficient
Hybrid Rice: Economic Assessment of a Promising Technology for Sustainable Food Grain Production in Bangladesh
Get PDFHybrid rice, one of the viable and proven technologies has been considered as a new frontier
to increase rice production for meeting growing demand for staple food in Bangladesh. Using
farm survey data this paper examines comparative profitability of hybrid and inbred rice
cultivation and estimates a Stochastic Frontier Function to determine the effect of key
variables on farm efficiency. Results show that hybrid rice gives substantially higher yield as
well as net return compared to inbred rice which leads to increase and sustainable growth of
food grain production. Analysis of Stochastic Frontier model shows hybrid rice farms are
technically more efficient than inbred
Hybrid Rice: Economic Assessment of a Promising Technology for Sustainable Food Grain Production in Bangladesh
Get PDFHybrid rice, one of the viable and proven technologies has been considered as a new frontier to increase rice production for meeting growing demand for staple food in Bangladesh. Using farm survey data this paper examines comparative profitability of hybrid and inbred rice cultivation and estimates a Stochastic Frontier Function to determine the effect of key variables on farm efficiency. Results show that hybrid rice gives substantially higher yield as well as net return compared to inbred rice which leads to increase and sustainable growth of food grain production. Analysis of Stochastic Frontier model shows hybrid rice farms are technically more efficient than inbred.Hybrid Rice, Technology, Economics, Food Self-sufficiency, Crop Production/Industries, International Development, Research and Development/Tech Change/Emerging Technologies,
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
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
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