1,720,961 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
Genetic studies in Sweet pepper (Capsicum annuum L.)
No full textThe present investigation entitled “Genetic studies in Sweet pepper (Capsicum annuum L.) was carried out to generate information on genetic variability, degree of inter-relationship between various traits, combining ability ( general and specific), nature and magnitude of gene effects and nature and magnitude of heterosis. The experimental materials consisted of ten diverse lines of Sweet pepper viz. SP-4, SP-21, SP-29, SP-31, SP-32, SP-82, SP-202, SP-614, SP-640 and California Wonder. The parents were crossed in diallel fashion to generate forty five crosses. The crosses and parents were evaluated as per Method II and Model I of Griffing (1956 a,b) in randomized complete block design during Kharif, 2010 at three different locations viz., Vegetable Experimental Farm of Division of Vegetable Science, SKUAST (K), Shalimar (E1); Krishi Vigyan Kendra, Malangpora (E2) and Regional Research Station, SKUAST (K), Wadura (E3). The observations were recorded on days to first flowering, days to first fruit set, days to first fruit maturity, plant height (cm), plant spread (cm), number of branches per plant, fruit length (cm), fruit diameter (cm), flesh thickness (mm), pedicel length (cm), average fruit weight (g), number of fruits per plant, fruit yield per plant (g), number of locules, average seed weight per fruit (g), flesh to seed ratio, total chlorophyll (mg/100g of fresh wt.), TSS (°Brix), vitamin C (mg/100g) and total carotenoids (mg/ 100g). The data was analyzed as per standard statistical procedures.
Analysis of variance revealed significant differences among the parents and crosses indicating that the materials selected for present investigation were diverse. The magnitudes of phenotypic and genotypic coefficients of variation were moderate to high depicting the ample scope for improvement through selection. The heritability (broad sense) was high for all the traits except number of locules. Fruit yield per plant exhibited significant positive correlation with number of branches per plant, fruit length, fruit diameter, flesh thickness, average fruit weight, number of fruits per plant and average seed weight per fruit.
Analysis of variance for combining ability revealed that variances due to gca and sca were significant for all the traits suggesting the importance of both types of variances in the inheritance of the traits. GCA and SCA also interacted significantly with the environments. The estimates of dominance variance were higher in magnitude than corresponding estimates of additive variance indicating the preponderance of non-additive gene action.
None of the parents exhibited desirable gca effects for all the traits simultaneously. However, overall ranking of genotypes revealed that the parents SP-21, SP-82, SP-640 and California Wonder exhibited significant desirable gca effects for most of the traits. None of the crosses exhibited significant desirable sca effects for all the traits simultaneously. However, the crosses SP-29 x SP-640, California Wonder x SP-82 and SP-82 x SP-614 were found to be desirable for most of the traits.
The component analysis revealed the preponderance of non-additive gene effects in the inheritance of traits. Net dominance effect was significant and positive for most of the traits indicating positive direction of dominance. Positive and significant ‘F’ values for days to first flowering, plant height, fruit length, pedicel length, average fruit weight and flesh to seed ratio indicated positive direction of dominance. Average degree of dominance was more than unity in all the traits indicating overdominance.
Significant values of t2 and significant deviation of regression coefficient from unity depicted the presence of epistasis in days to first flowering, flesh thickness and fruit yield per plant in all the environments and pooled analysis. Higher magnitude of heterosis in fruit yield per plant, average fruit weight and number of fruits per plant suggested the possibility of yield enhancement through exploitation of heterosis
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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