1,720,964 research outputs found
Pilot Field Trials With Aedes albopictus Irradiated Sterile Males in Italian Urban Areas
No full textThe pilot Þeld studies here presented are part of a long-term research program aimed
to develop a cost-effective sterile insect technique (SIT) methodology to suppress Aedes albopictus
(Skuse) populations. Aedes albopictus is a mosquito species mainly developing in man-made containers
and with an island-like urban and suburban distribution. These two features make the application of
the sterile insect technique a possible control strategy. Five trials have been performed in three small
towns from 2005 to 2009 (Emilia-Romagna region, northern Italy). Reared male pupae, sexed by a
sieving technique allowing the recovery of 26Ð29% of males, were exposed to gamma rays and
immediately released in the Þeld. Adult population density was estimated based on a weekly monitoring
of egg density in the ovitraps, whereas induced sterility was estimated by measuring the
hatching percentage of weekly collected eggs in SIT and control areas. Results showed that sterile
males released at the rate of 896Ð1,590 males/ha/wk induced a signiÞcant sterility level in the local
population. In addition, when the sterility level achieved values in the range of 70Ð80%, a similar
reduction also was found for the egg density in the ovitraps. We could estimate that the minimum egg
sterility value of 81% should be maintained to obtain suppression of the local population. Immigration
of mated females was not a main issue in the small villages where trials have been run
Scale-up of sexing systems for SIT application on Aedes albopictus at the C.A.A. pilot facility
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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
Mass Production Cage for Aedes albopictus (Diptera: Culicidae)
No full textMass production is an important component of any pest or vector control program that
requires the release of large number of insects. As part of efforts to develop an area-wide program
involving the sterile insect technique (SIT) for the control of mosquitoes, the Insect Pest Control
Laboratory of the Food and Agriculture OrganizationÐInternational Atomic Energy Agency (FAOÐ
IAEA Joint Division) has developed a mass production cage (Aedes MPC) for brood stock colonies
in a mass production system for Aedes albopictus (Skuse, 1895). A preliminary experiment using
Plexiglas cages was carried out to estimate the impact of cage volume on egg productivity. Transparent
Plexiglas cages of different dimensions but loaded with the same adult density were tested. Egg
productivity (number of eggs laid per adult female) and adult survival were recorded and analyzed.
According to the results, the optimal volume of 100 liters has been chosen to develop the Aedes MPC.
The numbers of adults introduced into the Aedes MPC did not affect the egg production and adult
survival in comparison with the Plexiglas cage experiment data, conÞrming the possible use of Aedes
MPC for mass-rearing procedures. Finally, the modiÞcation of Aedes MPC and creation of a new
prototype model of MPC (Anopheles MPC) to effectively contain Anopheles arabiensis (Patton, 1905)
adults is discussed with major changes pioneered to oviposition devices and systems for automatic
collection of the eggs
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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