1,721,591 research outputs found
PCM aided PICs: a Crucial Migration Towards Cutting-Edge Signal Processing
No full textAdvanced signal processing is paramount in different sectors, including wireless communications, neural networks, artificial intelligence, quantum computing, medical diagnosis, internet of things, etc. With its rapid growth, silicon photonic integrated circuit (PIC) based signal processors are established to be a strong competitor to their electronic counterparts, owing to various advantages like small footprint, low energy consumption, immunity to electromagnetic interference, high speed operation, CMOS compatibility, etc. However, traditional means of realizing programmability, such as thermo-optic and carrier dispersion often suffer from large footprints due to small modulation in refractive index. Further, the volatile nature of such a programming mechanism requires a continuous power supply. In this context, a new generation of low-loss, large index contrast, non-volatile phase change materials (PCMs) are showing great promise towards upscaling the silicon photonic signal processing units. Here, a compact resonator cavity-based signal processing unit is proposed through advantageous integration of a hybrid plasmonic mode in the silicon photonic domain and low-loss PCM. Excellent switching performance with extinction ratio > 30 dB and low energy consumption of 7.6 nJ, highlighting its promise towards different sectors such as telecommunications, neural networks, etc
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
Critical Wavelength Referencing Free Biosensor Using Silicon-on-Insulator-Based Directional Coupler
No full textIn this article, we propose and theoretically analyze a novel sensor structure for bulk refractive index (RI) and bio-layer sensing applications. The sensor utilizes a directional coupler (DC) consisting of two silicon-on-insulator (SOI) waveguides and the existence of the critical wavelength in the transmission spectra of the DC to enhance the sensitivity. Optimizing various opto-geometrical parameters, viz., the width of individual waveguides, the separation between them, and the slot width of the upper cladding, we have achieved an extremely high RI sensitivity ∼30 μm/RIU for aqueous solutions having RI close to ~1.333, and a surface adlayer sensitivity ~25.5 nm/nm for adsorbed bio-layers of RI 1.45 and thickness 6 nm. The analysis has been performed for the TE-like mode. We also show that the phase-measurement-based sensitivity calculations, despite being relatively complex, offer critical wavelength free sensing, and thus are better suited to avoid false alarms. Owing to the high bulk and surface sensitivities, our results can find application in designing high-precision biosensors
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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