1,721,059 research outputs found
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
Models and analysis of a stochastic neural source coder
Get PDFInformation transfer in neurons takes place through action potentials (spikes) which are metabolically expensive. A neural coding approach was developed by Johnson et al. (2016) that is optimal, high-fidelity, energy-efficient and well matches the experimental spiking behavior of real neurons. This coder, called a neural source-coder, uses an adaptive threshold to internally reconstruct the stimulus. The spikes are timed to minimize coding error. These spikes are generated by a deterministic firing rule. However, some random variability in spike timing is observed in real data. It seems reasonable to account for the variability by adding a stochastic component to the deterministic model.
Previously, the source-coding neuron used a constant threshold for generating spikes, while the stochastic neural encoder uses a partially randomized threshold. In this thesis we explore this random component and its success in explaining and recreating experimentally obtained spike-train statistics (from P-type electrosensory afferents of weakly electric fish). We also take a close look at the growth in variance of inter-spike intervals (ISIs) and the deviation of the stochastic source-coding neuron from an ideal DC-block system with infinite memory. The stochastic source-coding neuron model was able to achieve very accurate reconstructions of P-type weakly electric fish spike-time statistics (inter-spike interval histograms, serial correlation coefficients) with a very simple model consisting of only four free tuning parameters. We were also able to demonstrate a markedly slower growth in variance consistent with experimental data but which Poisson spike trains fail to capture. We were also able to derive mathematical correspondence for the observed experimental behavior such as the SCC trends, the rate of growth in variance of the ISIs and the power spectrum of the spike trains at low frequencies. The simulations back the mathematical findings illustrating the success of the model at creating statistically accurate and realistic spike trains.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-05-01The student, Robin Singh Sidhu, accepted the attached license on 2020-05-13 at 16:55.The student, Robin Singh Sidhu, submitted this Thesis for approval on 2020-05-13 at 17:03.This Thesis was approved for publication on 2020-05-14 at 14:06.DSpace SAF Submission Ingestion Package generated from Vireo submission #15385 on 2020-08-25 at 17:44:27Made available in DSpace on 2020-08-27T00:51:34Z (GMT). No. of bitstreams: 2
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Previous issue date: 2020-05-14Embargo set by: Seth Robbins for item 115967
Lift date: 2022-08-27T00:51:40Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemAuthor requested closed access (OA after 2yrs) in Vireo ETD systemLimite
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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