1,720,958 research outputs found
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
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
Real-time PCR data express the different distribution of avian Metapneumovirus and Mycoplasma synoviae in broiler chickens experimentally infected with one or both pathogens. Preliminary results.
No full textMycoplasma synoviae (MS) is an avian bacterial pathogen whose importance has grown considerably in the last years in many European countries (1). MS infection is related to respiratory disease, synovitis and EAA (2). As for many other pathogens, the severity of the respiratory disease can be enhanced by the co-infection with other viral or bacterial pathogens. Although the increased relevance of Metapneumovirus (aMPV) as a cause of respiratory disease in broilers in the field, less is known regarding its co-infection with Mycoplasma spp. in chickens and especially with MS. The aim of the present study was to experimentally reproduce the infection between aMPV and MS in commercial broiler chickens. The possible synergistic relationship between the two pathogens was evaluated through the analysis of the real-time PCR (aMPV and MS) results.
For the experimental study, 160 1-day-old chicks were randomly divided in 4 groups (A, B, C and E) and housed in Montair® isolators. Group A (positive AMPV control) was inoculated via the oculo-nasal route with avian Metapneumovirus, group C received, via the same route, Mycoplasma synoviae and group B was infected with both pathogens (oculo-nasal administration). Group E acted as negative control. Group A and B received aMPV at day 15 of age and 3 days later (18-days old) group B and C were infected with MS. The experimental design was chosen in order to reproduce as much as possible the natural infection. At different times after the aMPV infection 5 animals/each group were randomly selected for post mortem evaluations, swabs were collected from respiratory and systemic tissues and submitted to real time aMPV PCR (3) and real time MS PCR (4). During the trial, which lasted until day 35 of age of the animals, serological and tissue specimens were collected for further investigations (data not shown). The infections were successfully reproduced and chickens showed clinical respiratory signs.
There were no significant differences between the A (aMPV) and B (aMPV+MS) group in the total number of aMPV positive PCR, but the trend in A and B during the time was different, actually, in the B group the outcome of positive aMPV PCR was delayed and lengthen during the trial and the nasal turbinates were positive for the whole length of it. The B group (aMPV+MS) showed a higher number of positive PCR for MS, either in the respiratory tract (especially in nasal turbinates, trachea and lungs) or in systemic tissues, such as spleen, cloaca, kidney, and brain, expressing a wider dissemination of Mycoplasma synoviae in the animals.
The preliminary data regarding the real time PCR results suggests the possible mutual/additive relationship between the two pathogens in broiler chickens, which seems to be related to a wider and a prolonged presence of MS and aMPV in the host
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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