1,720,979 research outputs found
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
Robust Control of Pulsatile Ventricular Assist Devices for Patients with Advanced Heart Failure
Full text linkIn this work, a robust control scheme has been developed for pulsatile left ventricular assist devices (LVADs) used for advanced heart failure patients, utilizing the sliding mode control philosophy. A widely accepted model for the cardiovascular system along with baroreflex feedback is used as the system. Simulations in MATLAB/Simulink show promising results for the proposed control scheme
Towards a crowdsourced framework for online hate speech moderation - a case study in the Indian political scenario
No full textProliferation of online political hate speech through social media has been a persisting problem and is being recently compounded by the arrival of AI-boosted content. This can lead to wanton dissemination of misinformation/disinformation and can cause extremist radicalisation or influence national electoral processes. Given the high stakes of negative social impact, it is becoming increasingly important to address the sensitive topic of content moderation on social media platforms, the debate being the dichotomy of free speech versus content harm. From that perspective, it is crucial to establish a nuanced definition and categorisation of harmful content that is sensitive to the culture and language of the place of dissemination, which is different from the current one-size-fits-All approach, where content moderation is performed by social media companies behind closed doors. In this paper, we present a democratized solution to this problem through a crowdsourced annotation process that may be used to have a transparent method of identifying harmful content, which can then be used to make moderation decisions like contextually weighted downranking of harmful content. We present proof of concept case studies in the Indian political electoral discourse. We introduce a curated dataset of tweets labeled by multiple annotators from diverse backgrounds and visualize insightful statistical patterns emerging therefrom. This is the first stage of a multi-year Global Partnership on AI (GPAI) project on responsible AI for social media governance. In 2024 and beyond, we plan to expand the work to include both memes and tweets, that are multilingual (a mixture of Hindi/Bengali, English, and romanised Hindi/Bengali)
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
Understanding the influence of electric field and dual doping on cytocompatibility of calcium phosphate bioceramics: Experimental and computational study
No full textAlthough doped bioceramics have been widely investigated for biomedical applications, the co-doped bioceramics remain mostly unexplored for bone regeneration and dental applications. Given this background, we have successfully developed Fe/Sr co-doped biphasic calcium phosphate (BCP) with varying dopant content and assessed its cytocompatibility with respect to different cell lines together with functional characterization. The Co-doped BCPs were found to be dielectric in nature and an increase in conductivity with dopant amount was recorded. The changes in lattice parameters were also probed using XRD based Rietveld refinement technique. An important observation is that, while the singular dopant of Sr/Fe at 20 mol% or higher amount reduces cell viability significantly, osteoblast viability is not compromised to any significant extent on Sr/Fe co-doped BCP, compared to undoped BCP. Our results indicate that one can tailor osteoblast functionality by controlling the co-dopant content.
From the clinical perspective of a dental implant, we have examined the cytocompatibility of the dual doped BCPs with epithelial cells. The cellular study showed a significant increase in both cellular viability and functionality with an increase in conductivity. Besides this, PCR study confirmed an absence of tumorigenic potential. Taken together, our study establishes unique advantage of Sr/Fe co-doping approach towards realizing their hard tissue replacement application.
Another fundamental goal of biomaterials science is to develop an understanding of the interaction between a living organism and inorganic material surface at the molecular level. Given these facts, we examined the influence of external electric field stimulation (up to 1.00 V/nm) on fibronectin adsorption on hydroxyapatite (HA) (001) surface at 300K using all-atom classical MD simulation method. The molecular level interaction was found to be regulated by the attractive electrostatic interaction, which changed with the external field strength. Non-monotonous changes in the structural integrity of fibronectin were recorded with the change in field strength /direction due to the spatial rearrangement of local charges and global structural changes of the protein. The dipole moment vectors of fibronectin, water and HA quantitatively exhibited a similar pattern of orienting themselves parallel to the field direction. One of the striking observations in the context of the cell-material interaction is that the RGD sequence of FN was exposed to solvent side, when the field was applied along +z-direction.
Summarizing, this dissertation reports the development of dual doped biphasic calcium phosphates and demonstrated their cytocompatibility. On fundamental aspects, this thesis also provided quantitative insights into the influence of electric field stimulation on molecular interactions involved in fibronectin adsorption on hydroxyapatite surface
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