1,721,313 research outputs found
Fungal leaf spot of greengram [Vigna radiata (L.) R. Wilczek] in Kashmir: Etiology and management
No full textCercospora leaf spot is the predominant foliar fungal disease of greengram in Kashmir and affected 5.87-28.43 per cent leaf area in crop stands at pod development stage during kharif 2008. Cercospora canescens an imperfect fungus belonging to class Hyphomycetes was found associated with the manifestation. The diagnostic symptoms comprised of roughly circular to irregular, white centered reddish brown to brown leaf spots measuring 2-12 mm in diameter. Potato and carrot-oatmeal based agar media supported equall growth of the pathogen. The survival of test pathogen in infected leaves, pods and seeds was influenced by surrounding environment. While the leaves and pods supported viable pathogen only upto March under open field conditions, the pathogen was recovered from same kind of debris during May when exposed to only post winter open field conditions. The seed and other infected material also supported survival of pathogen beyond March when kept inside room during winter and spring months. Cercospora canescens from Shalimar was host specific and host range was confined to blackgram and cowpea. Shalimar Mung-1 was invariably susceptible to C. canescens at all growth stages for having high sugar (124.03-134.89 mg/g dry weight) to support pathogenisis besides lacking in sufficient phenol (20.73-26.53 mg/g dry weight) to contain the invasion. Under natural epiphytotic conditions, sharp increase in Cercospora leaf spot intensity was recorded during August which witnessed maximum and minimum temperatures of about 30 and 17 oC, respectively, besides experiencing high RH (over 80 %). Higher values of periodic disease (>6%) coincided with average maximum temperature 27.16-30.23 oC, minimum temperature 10.07-16.5 oC, RH 81.65-84.50 per cent and periodic rainfall of 2.3-33.6 mm. The disease intensity was, however, less influenced by most of the weather factors, though minimum temperature was significantly correlated with disease for the period between July-25 and September-13. Most of the available germplasm of greengram including Shalimar Mung-1 showed susceptible response to the test fungus under field conditions with only four genotypes viz., ML-935, PDM-54, SM-710 and SM-366 suffering less leaf spot intensity (26.77-29.47 %). The terminal disease intensity manifested by May sown crop (23.34-27.21 %) was significantly low when compared to late sowings which suffered maximum disease attack and experienced proportionate decrease in seed yield with lowest (7.33-7.42 q/ha) obtained in July sown crop. Foliar application of carbendazim 50WP (0.05 %) at first appearance of disease followed by another spray with hexaconazole 5EC (0.02 %) or mancozeb 75WP (0.25 %) ensured significant control of disease incidence (47.13-77.26 %) and intensity (48.44-68.71 %) besides supporting proportionately attractive seed yield (8.62-8.95 q/ha) at an acceptable B:C ratio of 3.05-6.38:1
Comparison between Color Spaces of Vita Lumin Shade Guide with Natural Teeth in Bengaluru Population using Spectrocolorimeter: An in vivo Study
No full textABSTRACT
Aim
The aim of this study is to compare the color space of Vita Lumin shade guide (SG) with the natural teeth of the local population.
Materials and methods
A total of 100 maxillary central incisors (100 patients) were subjected to color measurement with a spectrocolorimeter. For each tooth, L*, a*, b* values were recorded. All the shade tabs of Vita Lumin SG were analyzed with a spectrocolorimeter to define the color space covered by the Vita Lumin SG. The L*a*b* values of natural teeth were plotted on separate scattered diagrams and compared.
Results
About two out of three attributes (luminance and blue spectrum) of the local population of Bengaluru displayed a broader range than those available in Vita Lumin SG.
Conclusion
The local population requires an SG with an extended range, covering a higher luminance spectrum and broader blue spectrum.
Clinical significance
Esthetic restorations require accurate shade matching with the adjacent natural teeth, SGs being the mean of shade selection and communication should be comparable to the natural teeth.
How to cite this article
Shetty RM, Bhat AN, Gupta N, Mehta D, Srivatsa G, Singh I. Comparison between Color Spaces of Vita Lumin Shade Guide with Natural Teeth in Bengaluru Population using Spectrocolorimeter: An in vivo Study. J Contemp Dent Pract 2017;18(8):683-687.
</jats:sec
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
- …
