1,721,154 research outputs found
Seaweed Farming – Success Story: Renuka Devi Munaikadu village Ramanathapuram
No full textSeaweed Farming – Success Story of Renuka Devi in Munaikadu village, Ramanathapuram, Tamil Nad
Optical Properties of Micro/Nano Structured Metal-Insulator-Metal Nanocavities
No full textPlasmonic metamaterials provide a great deal of optical tunability and interesting phenomena in terms of light-matter interaction. Metal-Insulator-Metal (MIM) nanocavities are one of the most versatile systems for nano light confinement and waveguiding. These cavities exhibit Epsilon-Near-Zero (ENZ) modes, which can be used in conjunction with emitters to improve their optical properties. MIM nanocavities have been extensively studied, but when the cavities are confined in one more direction, the behavior changes. The purpose of this study is to investigate the effect of lateral micro/nano structuring on the optical properties of these cavities.
The ENZ cavity resonance present in planar cavities persist even when the lateral dimensions are reduced to the micrometer range. When the diameters of the cavities are further reduced to hundreds of nanometers, electric (ED) and magnetic dipole (MD) modes come into picture. These modes are present even in micron size structures, but they fall in infrared region. Recently all-dielectric nanostructures have gained popularity to manifest these dipole modes, as they eliminate the dissipative losses present in metallic nanostructures and support toroidal dipoles (TD) when the geometry is optimized. The destructive interference of any two of these dipole modes, which cancels the far-field radiation, results in a non-radiative mode known as anapole. However, this necessitates the use of materials with a high refractive index (n), typically n ≥ 3. In low index materials like Alumina (Al2O3), the MIM configuration provides the necessary field confinement and can excite these modes. The existence of ENZ cavity modes in MIM micropillars, as well as dipole and anapole-like modes in MIM nanopillars, is demonstrated experimentally.
Photolithography (for micropillars) and electron-beam lithography (for nanopillars) were used to fabricate, and ellipsometry to characterize the samples. To facilitate cost-effective, large area fabrication, Talbot lithography technique was exploited to get smaller feature sizes (<500nm) using standard photolithography setup. In addition, a lithography-free, dry-synthesis technique was explored to produce nanophorous metal films and their plasmonic properties were examined
Performance Comparison of Heterogeneity Measures for Count Data Models in Bayesian Perspective
No full textRandom effects model is one of the widely used statistical techniques in combining information from multiple independent studies and examine the heterogeneity. The present study has focussed on count data model which is comparatively uncommon in such research studies. Also the interest is to exploit the advantage of Bayesian modelling by incorporating plausible prior distributions on the parameter of interest. The study is illustrated with a data on rental bikes obtained from UC Irvine Machine Learning Repository. Results have indicated the impact of prior distributions and usage of heterogeneity estimators in count data models
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
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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