1,721,035 research outputs found
Bayesian Markov models consistently outperform PWMs at predicting motifs in nucleotide sequences.
Get PDFPosition weight matrices (PWMs) are the standard model for DNA and RNA regulatory motifs. In PWMs nucleotide probabilities are independent of nucleotides at other positions. Models that account for dependencies need many parameters and are prone to overfitting. We have developed a Bayesian approach for motif discovery using Markov models in which conditional probabilities of order k - 1 act as priors for those of order k This Bayesian Markov model (BaMM) training automatically adapts model complexity to the amount of available data. We also derive an EM algorithm for de-novo discovery of enriched motifs. For transcription factor binding, BaMMs achieve significantly (P = 1/16) higher cross-validated partial AUC than PWMs in 97% of 446 ChIP-seq ENCODE datasets and improve performance by 36% on average. BaMMs also learn complex multipartite motifs, improving predictions of transcription start sites, polyadenylation sites, bacterial pause sites, and RNA binding sites by 26-101%. BaMMs never performed worse than PWMs. These robust improvements argue in favour of generally replacing PWMs by BaMMs
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
Anreizmechanismen für Smart Metering
No full textDie Diskussion über Anreizmechanismen für Smart Metering ist derzeit geprägt von den offenen Fragen hinsichtlich der Refinanzierung der erforderlichen Investitionen, den noch nicht umfassend greifenden regulatorischen Voraussetzungen und dem Willen der vorherrschenden Akteure Veränderungen im Rahmen von neuen Geschäftsmodellen und Re-organisation voranzutreiben. Dennoch zeigen Modelle wie z. B. das Demand-Response-Program Möglichkeiten auf, durch die ein wichtiger Beitrag für die Energiewirtschaft der Zukunft geleistet wird, was bereits in anderen Ländern erfolgreich bewiesen wird. Zusätzlich zur den technologischen Herausforderungen, liegen die Erfolgsfaktoren in der aktiven Einbindung der Nutzer, in der Umsetzung flexibler Planungs- und Steuerungsverfahren und dem Überdenken der traditionellen Geschäftsmodelle in Richtung neuer Service- und Tarifmodelle
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
Anreizmechanismen für Smart Metering
No full textDie Diskussion über Anreizmechanismen für Smart Metering ist derzeit geprägt von den offenen Fragen hinsichtlich der Refinanzierung der erforderlichen Investitionen, den noch nicht umfassend greifenden regulatorischen Voraussetzungen und dem Willen der vorherrschenden Akteure Veränderungen im Rahmen von neuen Geschäftsmodellen und Re-organisation voranzutreiben. Dennoch zeigen Modelle wie z. B. das Demand-Response-Program Möglichkeiten auf, durch die ein wichtiger Beitrag für die Energiewirtschaft der Zukunft geleistet wird, was bereits in anderen Ländern erfolgreich bewiesen wird. Zusätzlich zur den technologischen Herausforderungen, liegen die Erfolgsfaktoren in der aktiven Einbindung der Nutzer, in der Umsetzung flexibler Planungs- und Steuerungsverfahren und dem Überdenken der traditionellen Geschäftsmodelle in Richtung neuer Service- und Tarifmodelle
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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