1,720,960 research outputs found
Data privacy in Africa’s ed-tech platforms : children’s right to privacy
Get PDFIn the past decade, there has been a significant increase in the use of educational technology (Edtech) platforms on the African continent. A number of these platforms utilize Artificial Intelligence (AI) and have revolutionized the global education sector. When a website or platform is intended for children, it must comply with national data protection laws, which are intended to safeguard children's personal information in the digital space. While there are valuable opportunities to use AI in ways that benefit children, there are crucial questions we must ask and answer in order to better safeguard children from the potential negative effects of AI
Computational Studies of Microscopic Superfluidity in 4He Clusters
Get PDFThe onset of microscopic superfluidity has been reported in ultracold droplets of bosons (4He atoms or para-H2 molecules) containing a variety of molecular dopants. The physics of these droplets involve both Bose-Einstein condensation (BEC) and superfluidity. The two phenomena, while closely related, are not exactly the same. Superfluidity is fundamentally a microscopic effect and thermodynamic limit is necessary; it is still remarkable, though, that the signature of superfluidity has been reported in doped droplets consisting of as few as 4 4He atoms. The studies presented here adopt a molecular vantage point to investigate the quantum mechanics behind the rotational dynamics of dopant molecules in small droplets consisting of 4He atoms. The overarching goal is to develop a detailed quantum mechanical understanding of the onset of microscopic superfluidity. Physically small though these droplets are, they represent a significant challenge to many body quantum physics. The most direct method of investigation is to use Quantum Monte Carlo (QMC) algorithms to perform the calculations. Fixed node diffusion Monte Carlo (FNDMC), a type of QMC algorithm, is employed for these studies. Finding nodal surfaces for use in the calculation of the excited states is an essential part of this algorithm, which assumes the nodal topology of the target wave function is known in advance. To that end, we developed a novel approach utilizing a genetic algorithm version of the FNDMC method in which the nodal hypersurfaces are computed systematically and on-the-fly within the DMC procedure. This algorithm is then applied to elucidating the nodal topology of 4He-CO, 4He-HCN and 4He-NH3 and is then utilized to study the phenomenon of microscopic superfluidity and the renormalization of rotational constants in these clusters
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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