1,720,966 research outputs found
Understanding the Body from the Inside: The Role of Interoceptive Belief Updating in Anorexia Nervosa
No full textAnorexia Nervosa (AN; an eating disorder) has been associated with disruptions in the way patients sense, interpret, and integrate internal physiological signals (i.e., interoception). Moreover, evidence has pointed towards a compromised ability of AN patients to evaluate their own cognition and reflect on related beliefs and abilities (metacognition). Yet, the way in which metacognitive beliefs about interoception are formed and updated both retrospectively (e.g., retrospective judgements of how well one perceived their heartbeat) and prospectively (e.g., how beliefs are used in combination with new information to predict future performance) in AN has not been examined. Moreover, despite the gastrointestinal system being directly linked to the AN symptomatology, little work has been carried out in this interoceptive modality. The two-fold aim of the present thesis was to study both retrospective and prospective metacognition in two interoceptive modalities, namely cardiac and gastrointestinal interoception.
To this end, two interoceptive belief updating tasks were developed to study interoceptive belief updating in a group of women with and weight-restored from AN (AN, and AN-WR, respectively) and matched healthy controls (HCs). The experiments in the cardiac modality examined how participants formed and updated their beliefs regarding their ability to feel their own heartbeat. The experiment in the gastrointestinal modality assessed how the groups differed in predicting stomach fullness states before and after drinking certain fixed amounts of water. The results showed that interoceptive accuracy may be domain-specific (participants did not differ in their accuracy to feel their heartbeats, but the estimates of stomach fullness in AN were greater than those in the HCs). Domain-general deficits were observed in the metacognitive level, wherein AN and AN-WR participants maintained their pessimistic priors when updating their beliefs about cardiac perception abilities and when forming predictions about future stomach fullness states. This poor belief updating was partly explained by the greater reliance on pessimistic prior beliefs or the confidence regarding the accuracy of prior beliefs in light of new, interoceptive evidence.
The results have wider implications for our understanding of the role of the different levels and modalities of interoception in AN, and the findings on the precision-weighting mechanism in AN suggest it should be therapeutically targeted in order to help patients improve their metacognitive beliefs about interoceptive abilities
Higgs Bosons and QCD Jets at Two Loops
Get PDFIn this thesis we present techniques for the calculation of two-loop integrals contributing to the virtual corrections to physical processes with three on-shell and one-off-shell external particles. First, we describe a set of basic tools that simplifyy the manipulation of complicated two-loop integrals. A technique for deriving helicity amplitudes with use of a set of projectors is demonstrated. Then we present an algorithm, introduced by Laporta, that helps reduce all possible two-loop integrals to a basic set of 'master integrals'. Subsequently, these master integrals are analytically evaluated by deriving and solving differential equations on the external scales of the process. Two-loop matrix elements and helicity amplitudes are calculated for the physical processes γ* → qqg and H → ggg respectively. Conventional Dimensional Regularization is used in the evaluation of Feynman diagrams. For both processes, the infrared singular behaviour is shown to agree with the one predicted by Catani
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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