1,720,958 research outputs found
Larvicidal activity of phytoextracts against dengue fever vector, Aedes aegypti - A review
Full text linkSince Aedes aegypti is considered as the major vector of dengue fever, development of strategies to accomplish improved vector control without much interference in the environment composition are more common. As phytochemicals are now in the run for achieving this goal, this review is a humble attempt to recognize the plant species and their larvicidal efficacy with their inhibitory action on the life cycle of the species of interest, that has been documented through various studies conducted till date. Here we also discuss the synergistic impact of a number of phytoextracts which will provide more efficient control measures for mosquito vectors. All these studies are an exploration for a risk-free vector control tactic to replace the current chemical insecticide application for the betterment of our nature
Life Cycle, Bio-ecology and DNA Barcoding of mosquitoes Aedes aegypti (Linnaeus) and Aedes albopictus (Skuse)
Full text linkMosquito borne diseases remain as the world’s most severe insect-borne disease with excessive rate in morbidity and mortality. Mosquitoes transmit various severe diseases, such as dengue, malaria, filariasis, viral encephalitis, Japanese encephalitis, chickungunya and zika virus infection causing millions of deaths worldwide; and no part of the world is liberated from mosquito borne diseases. Aedes aegypti and Aedes albopictus represent the two important mosquito vectors for dengue virus transmission in America and Asia. According to the Integrated Disease Surveillance Project (ISDP), 8888 confirmed dengue infections were reported from January 1st to June 30th 2017 in Kerala state, India. Of which 409 confirmed dengue infections were reported from Thrissur district of Kerala including Irinjalakuda Municipality, the study area. In addition, 15 confirmed and 56 suspected dengue fever death were also reported from Kerala state, India . Current epidemics of dengue and severe mosquito borne diseases from Kerala have exposed the need for more comprehensive understanding of the mosquito species types, their vectorial capacity, and the habitat characteristics that offer them for proper breeding environment in the study area. The present study also explored the applicability of COI-based DNA bar coding as an alternative approach to identify mosquito species such as A. aegypti and A. albopictus.
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
Ultrasonic Mosquito Repellers as a Green Alternative to Chemical Protection: A Review
Full text linkMosquitoes are vectors of life-threatening diseases such as malaria, dengue, chikungunya, and Zika, which pose a severe threat to global public health. With increasing global interest in environmentally safe and non-toxic mosquito control strategies, ultrasonic mosquito repellers are gaining attention as potential alternative. These energy efficient devices produce high frequency sound waves which irritate and repel mosquitoes. This review highlights the working mechanism of ultrasonic mosquito repellers and briefly compares them with conventional methods such as chemical insecticides, bed nets, and biological controls. Some scientific studies highlight the limited efficacy of these devices by stating that mosquitoes are largely unaffected by the designed higher sound frequencies. Despite this, they have very less environmental impact compared to other chemical repellents which always cause water contamination and harm other non-targeted species. In addition, the low energy footprint making these devices a good option for indoor and outdoor environment. In contrast, potential concerns include, this device probably negatively interfere with the species that rely on sound for communication and navigation. Apart from this, the wide spread use could contribute to the accumulation of electronic waste if the devices are discarded after limited use. This review critically examines the potential of ultrasonic repellers as eco-friendly mosquito repelling tool based on available scientific evidence
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
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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