1,720,965 research outputs found
Biology of barley shoot fly Delia flavibasis Stein (Diptera: Anthomyiidae) on resistant and susceptible barley cultivars
Get PDFThe biology of barley shoot fly Delia flavibasis was studied using resistant (Dinsho and Harbu) and susceptible (Holker) barley cultivars at Sinana Agricultural Research Center, Ethiopia. A higher number of eggs was laid on Holker (17 eggs/female) than on Dinsho (11 eggs/female) or Harbu (12 eggs/female). However, there were no differences between cultivars in preoviposition and total reproductive periods. The shortest time required to complete larval, pupal and total developmental stages from egg to adult emergence occurred when the insect was reared on the cultivar Holker. Pupal weight, adult emergence and adult longevity did not differ between cultivars. The female to male sex ratio was 1:1. This study enabled us to understand the duration of each of the life stages of D. flavibasis, which will undoubtedly aid researchers and growers to design a sustainable management strategy against barley shoot fly
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
Management of an emerging pest, Tetranychus urticae Koch (Acari: Tetranychidae), with pesticides in eastern Ethiopia
Get PDFOutbreak of two-spotted spider mite, Tetranychus urticae Koch, happened
on potato ( Solanum tuberosum L.) in eastern Ethiopia in 2014 and
effective pesticides as part of IPM practice were sought from
greenhouse and laboratory experiments at Haramaya University, Ethiopia.
The objective of the study was to identify pesticides with the highest
efficacy against the mite. Potatoes infested with mites were used in
the efficacy trial. Treatments, 9 pesticides and a control, were
applied 2 times at weekly intervals. Mites per leaf before and after
each spray were counted. Promising pesticides were further screened
with leaf-disc spray, and dip methods. Adult mortality was recorded
after 24 and 48 hours. Chlorantrniliprole + Lambda-cyhalothrin,
Amitraz, Profenofos, Profenofos \u201cQ\u201d 720 g l-1, and Paraffin
oil showed superior efficacy on eggs and mobile stages; though
Paraffin\u2019s efficacy became clear 14 days later. Paraffin had the
lowest mortality in leaf-disc sprays, but better mortality in the
leaf-disc dip. This was attributed to complete wetting by the latter.
Chlorantrniliprole + lambda-cyhalothrin, Profenofos, Profenofos
\u201cQ\u201d and Paraffin were identified as promising pesticides
for the two spotted spider mite management on potato.L\u2019explosion de t\ue9tranyque \ue0 deux points, Tetranychus
urticae Koch, s\u2019est produite sur la patate ( Solanum tuberosum
L.) dans l\u2019Est de l\u2019Ethiopie en 2014 et des pesticides
effectifs comme une partie de de pratique IPM a \ue9t\ue9
recherch\ue9e \ue0 partir des exp\ue9rimentations sous serre et
au laboratoire \ue0 l\u2019Universit\ue9 de Haramaya, Ethiopie.
L\u2019objectif de l\u2019\ue9tude \ue9tait d\u2019identifier
les pesticides avec de tr\ue8s grande efficacit\ue9 contre le
t\ue9tranyque. Les patates infest\ue9es avec les t\ue9tranyques
ont \ue9t\ue9 utilis\ue9es dans un essai d\u2019efficacit\ue9.
Les traitements, 9 pesticides et un contr\uf4le, \ue9taient
appliqu\ue9s deux fois \ue0 des intervalles d\u2019une semaine.
Les t\ue9tranyques par feuille ont \ue9t\ue9 compt\ue9s avant
et apr\ue8s chaque traitement. Des pesticidesprometteurs ont
\ue9t\ue9 \ue9galement\ue9valu\ue9s avec le pulv\ue9riseur
\ue0 disque sur les feuilles, et les m\ue9thodes d\u2019immersion.
La mortalit\ue9 de l\u2019adulte\ue9tait evalu\ue9e apr\ue8s
24 et 48 heures. Chlorantrniliprole + Lambda-cyhalothrin, Amitraz,
Profenofos, Profenofos \u201cQ\u201d 720 g l-1, et l\u2019huile du
Paraffine ont montr\ue9 une efficacit\ue9 sup\ue9rieure sur les
\u153ufs, stages mobiles\ua0; quoique l\u2019efficacit\ue9 de
paraffine est devenue claire \ue0 14 jours apr\ue8s. Paraffine a eu
la plus faible mortalit\ue9 avec le pulv\ue9riseur \ue0 disque
sur la feuille, mais meilleure mortalit\ue9 avec l\u2019immersion de
la feuille. Ceci a \ue9t\ue9 attribu\ue9 \ue0 la mouillure
compl\ue8te de la deuxi\ue8me m\ue9thode. Chlorantrniliprole +
lambda-cyhalothrin, Profenofos, profenofos \u201cQ\u201d et Paraffine
ont \ue9t\ue9 identifi\ue9s comme pesticide prometteurs, pour la
gestion du t\ue9tranyque \ue0 deux points sur la tomate
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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