1,720,953 research outputs found
Spaces of contestation: the everyday experiences of ten African migrants in Cape Town
No full textIncludes bibliographical references.Xenophobia in South Africa is so overt that it has take a covert form. The 'xenocide' events that took place in 2008 were called xenophobic acts. It is the recurrent denialism of xenophobia on an everyday basis that this project has explored through the narrative accounts of ten African migrants in Cape Town. The lived everyday experiences of ten African migrants have brought forward the central argument of this thesis. From the data, it is evident that as a reponse to everyday pressures of prejudices and xenophobia in social and physical spaces, African migrants have developed mutable, unsettled and vagrant identities in order to cope with everyday low level violence. This argument emerged as four key stressors have been identified as the components of a more substantial explanation of xenophobia in South Africa. The four key components are: the enforcement of identity (national and group), the demarcation of spaces of belonging, the experiences of economic insecurity, and lastly a 'culture of violence' in South Africa. This thesis argues that these four stressors are the result of an on-going active process of xenophobic attitudes
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
Guppy gene expression dynamics: effects of sex, reproductive status, feeding, and temperature on reproductive function, methylation, and appetite
No full textIntroduction: This thesis examines the dynamics of gene expression in guppy fish (Poecilia reticulata) under various growth conditions, diets, and temperatures. Understanding the molecular processes underlying methylation, reproduction, and appetite regulation in these fish is the goal of this research. The process by which genetic information is transformed into useful products like proteins is known as gene expression. Guppy reproduction is highly impacted by elements like diet and temperature. This work investigates the effects of these factors on gene expression.
Methodology: Male and female guppies (Poecilia reticulata) were housed in 20L aquariums with filtered water at 25°C under a 12-hour light/dark cycle. Fish were acclimated for a week and fed daily with Fancy Guppy meal. For gene expression analysis, fish were divided into experimental groups: 1) fasting vs. feeding for 14 days, 2) temperature effects (25°C, 32°C, and 18°C). Tissues (brain, liver, intestine) were collected post-mortem for RNA extraction using the GeneJET RNA Purification Kit. Total RNA was reverse transcribed using the SensiFAST cDNA Synthesis Kit. Specific gene expression was analyzed via qPCR, and primer design was based on Poecilia reticulata sequences. Data were analyzed using the 2-ΔΔCt method, normalized to reference genes GAPDH, EF-1α, and β-actin. Statistical analyses included ANOVA and non-parametric tests with a significance level of P<0.05.
Results: A total of 45 guppies were examined, including 33 females and 12 males, with females classified into three reproductive stages. Analysis of brain gene expression showed no significant differences in orexin (OX) or NPY levels between groups, but Kiss2 expression was higher in females with late-stage embryos, while AVP was elevated in males. Intestinal and liver genes expression showed no significant changes. In fasting experiments, females consumed more food than males, with brain orexin in fast male and hepatic dnmt3b expression in fed male being significantly higher. Gnrh3 and npvf expression in fasted male and IT expression in fed female were higher. Temperature experiments revealed that food intake increased at higher temperatures, and npvf and Orexin levels were elevated at 32°C and 18°C in males. However, no significant changes were observed in epigenetic-related genes in response to temperature variations.
Conclusion: This study demonstrates how environmental elements like temperature and diet can have a substantial impact on guppy gene expression and phenotypic adaptation. The results of this study advance our knowledge of the molecular mechanisms underlying living things' flexibility and adaptation to environmental changes and may find use in aquaculture and conservation.Includes bibliographical references (pages 81-98
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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