1,721,034 research outputs found
Oxygen demand of bean bruchids (Acanthoscelides obtectus Say)
Get PDFThe common bean (Phaseolus vulgaris L) is an important crop in many countries and its safe storage is crucial in maintaining a sufficient and high quality food supply for the community. A non-chemical storage technique, hermetic storage, is being used to control the bean bruchid (Acanthoscelides obtectus Say), a beetle which can cause large losses to stored beans. Experiments were carried out using hermetically sealed containers of known gas volume at different temperatures (10 and 27°C) and bean moistures (8 and 16% wet basis) to quantify the oxygen requirement of bruchids. Bruchids use between 0.0074 and 0.1043 cm3 bruchid-1day-1, depending on bean temperature and bean moisture content. Days to 100% adult bruchid mortality in hermetic storage, as a function of infestation level, storage volume, temperature and bean moisture content, can be estimated by using these oxygen requirement results. These estimates can be used to design hermetic storage systems to protect beans from damage by bruchids.This article is published as Jeffrey, Askey, Bern Carl, Brumm Thomas, and Coats Joel. "Oxygen demand of bean bruchids (Acanthoscelides obtectus Say)." Journal of Stored Products and Postharvest Research 11, no. 2 (2020): 8-14. doi: http://www.academicjournals.org/JSPPR. Copyright ©2020 Author(s). This is an open access article under the terms of the Creative Commons Attribution. http://creativecommons.org/licenses/by/4.0/deed.en_US
Hermetic storage of maize grain in repurposed food oil containers to control maize weevils
Get PDFInsect-related grain loss is a significant problem in Uganda and other countries in sub Saharan Africa. The maize weevil (Sitophilus zeamais Motschulsky) is one of the major insect pests that infests stored maize grain (Zea mays Linneaus). This study demonstrates the feasibility of hermetic or “air-tight” storage for protecting maize from maize weevil damage using low-cost repurposed food oil containers. Maize infested with weevils was obtained from a local market in Kamuli, Uganda. Quality characteristics determined before storage included live weevil numbers, moisture content, and kernel damage. Storage treatments, each done in triplicate in 10-L containers, included (1) hermetically sealed and (2) non-hermetically sealed maize grain. After 30 days of storage, 100% mortality of maize weevils was achieved in treatment (1), while the number of weevils increased by nearly a factor of three in treatment (2). Although, there were no significant differences between treatments in final moisture content, test weight, and damage, broken corn and foreign material was significantly higher in treatment (2) versus (1). This 30-day study using an experimental design with up to three replicated treatments demonstrated that repurposed food oil containers can be effectively used for hermetic storage of maize.This article is published as Brumm, Thomas J., Carl J. Bern, and David F. Webber. "Hermetic storage of maize grain in repurposed food oil containers to control maize weevils." Journal of Stored Products and Postharvest Research 12, no. 2 (2021): 42-46. doi: http://www.academicjournals.org/JSPPR. Copyright ©2021 Author(s). This is an open access article under the terms of the Creative Commons Attribution. http://creativecommons.org/licenses/by/4.0/deed.en_US
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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