1,720,954 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
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
Larvicidal Efficacies of Certain Plant Extracts against Fourth Instar Larvae of Aedes albopictus Skuse
Get PDFAsian tiger mosquito, Aedes albopictus (Diptera: Culicidae) is becoming a competent vector for dengue, chikungunya and other viruses. Most common insecticides and repellents may exert toxic effect on non-target organisms including man. Hence alternative vector management strategies need to be explored. Biopesticides including plant products may be employed as mosquito control agents. In this study, an attempt has been made to evaluate the insecticidal potential of aqueous leaf extracts of Clerodendrum infortunatum, Ailanthus excelsa, Aloe vera and Sesbania grandiflora on mortality of fourth instar larvae of Aedes albopictus. Larvicidal effect was studied at doses ranging from 100 to 600 ppm. The results indicate that aqueous leaf extracts of C. infortunatum (LC50- 614.6ppm) showed a higher mortality rate than A. excelsa, A. vera and S. grandiflora. Biochemical analyses revealed an increase in protein, glycogen and lipid concentration in plant extract treated larvae, when compared to control ones, whereas amount of amino acid decreased in treated larvae. This clearly indicates a physiological as well as biochemical imbalance in larvae, induced by plant extracts. Presence of secondary metabolites such as alkaloids, flavonoids, tannins, glycosides, phenols was detected by qualitative analyses of plant extract which may contribute for its insecticidal effect.
 
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
Evaluation of Insecticidal and Antimicrobial Effect of Boerhavia diffusa
Get PDFBoerhavia diffusa, commonly known as ‘Punarnava’ in the Indian system of medicine is a perennial creeping herb found throughout the waste lands. The insecticidal activity of aqueous and acetone extracts of B. diffusa was tested against the pest insect Dysdercus cingulatus, commonly known as Red Cotton Bug. The plant extract exhibited ovicidal effect, nymphicidal effect, varying degree of moulting disruption, reduced fecundity rate along with prolonged mating period. Insecticidal property exhibited by this plant extract can be exploited in the field of Integrated Pest Management, so as to reduce the hazardous effects of chemical pesticides. The toxic principles present in the plant extract are actually secondary metabolites that are evolved as a protective measure against herbivorous animals. Antimicrobial activity of B. diffusa was also evaluated using gram negative bacteria, Pseudomonas aeruginosa and showed significant level of sensitivity to B. diffusa extracts. Thus it is evident that B. diffusa possess toxic principles having insecticidal as well as antimicrobial activity which can be employed in the field of agriculture and medicine respectively.
 
- …
