1,720,962 research outputs found
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
Detection of naturally infected vector ticks (acari: ixodidae) by different species of babesia and theileria agents from three different enzootic parts of iran.
No full textBackground: Diagnostic study of vector ticks for different pathogens transmitted specifically have been done by Iranian old scientists working on the basis of biological transmission of pathogens. In this study we decided to con- firm natural infection of different collected ticks from three different provinces of Iran.
Methods: Ticks were collected from livestock (sheep, goats and cattle) during favorable seasons (April to September 2007 and 2008). Slide preparations were stained by Giemsa and Feulgen and were studied searching for any trace of infection. Positive DNA from infected blood or tissue samples was provided and was used as positive control. First, PCR optimization for positive DNA was done, and then tick samples were subjected to specific PCR.
Results: Eleven pairs of primers were designed for detection of Theileria, Babesia and Anaplasma spp. Totally 21 tick samples were detected to be infected with protozoa. Hyalomma anatolicum anatolicum and Rhipicephalus turanicus from Fars Province were infected with T. lestoquardi at two different places. Hyalomma detritum was in- fected with T. lestoquardi in Lorestan Province and Rh. turanicus was infected to Ba. ovis from Fars Province.
Conclusion: Totally 21 tick samples were detected to be infected with protozoa. Every sample is regarded with host- environment related factors. Since there are complex relations of vectors and their relevant protozoa, different proce- dures are presented for future studies
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
Comparison of different methods for ectoparasite infestation detection in Laboratory bred animals and standardization of their health certificate
No full textIn order to study external parasites of laboratory reared animals at Razi institute, different methods including brushing of animal's surface body, cellophane tape of body surface, peri-anal cellophane tape test (CTT) and skin scrapings and digestive method were applied and collected samples were studied. In addition, field collected rats were tested using brushing method. One mouse had been infested by some mites. Rabbits, rats, mice and guinea pigs had not been infested with external parasites. Field collected rats had been highly infested with mites from the family Laelapidae. The, brushing method was confirmed to be a useful method for mite detection. According to the methods used in this study and these recommended by SOP from international animal breeding centers the CTT method was proposed to be useful for preparing health certificate of laboratory animals at the department of laboratory animal breading at Razi institute
Some New Records of Culicoides Species (Diptera: Ceratopogonidae) from Iran
No full textBackground: Biting midges of the genus Culicoides act as vectors for important diseases affecting humans and both wild and domestic animals. Collection of adult Culicoides specimens in the near vicinity of vertebrate hosts is the major part of any bluetongue surveillance plan. There are old records of Culicoides species dated from 1963, 1968 and 1975. Therefore, it was decided to collect different ceratopogonids members using a light trap.
Methods: One night catching using light traps with a suction fan was performed at representative sites (25 places) located in North Western Provinces (Ardebil, Eastern Azerbaijan, Western Azerbaijan and Zanjan) of Iran (suspected farms for clinical records of Bluetongue virus or serodiagnosis of the Bluetongue virus). Samples were detected and identified primarily and were sent to a reference center for final verification.
Results: Seven Culicoides species including (Culicoides circumscriptus, C. flavidus, C. longipennis, C. pulicaris, C. puncatatus, C. nubeculosus, and three species from Culicoides (Oecacta) are under study in reference laboratory in Poland and C. puncticollis were confirmed from Iran.
Conclusions: Morphological and explanation of each species was regarded in this study. In comparison to old record, there are four new records of Culicoides species from Iran and one species is regarded suspected for viral transmission
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
- …
