1,720,957 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
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
Investigation into the effects of end stage renal failure and renal replacement therapy on adipose tissue metabolism
Get PDFkoamabayili/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
Investigation into the effects of end stage renal failure and renal replacement therapy on adipose tissue metabolism
No full textBackground and aims: End stage renal disease (ESRD), an increasing global major public health problem, has greatly increased cardiovascular disease risk (CVD) than the general population for unknown reasons. Preliminary data suggest that adipose tissue, shown to contribute to CVD risk in non-ESRD populations, may also play a part in ESRD. Adipose tissue is a complex organ which not only functions as a fat storing depot, but also plays an essential role in lipid metabolism. Recently, researchers have recognized that adipose tissue is also an endocrine organ since it secretes several cytokines and adipokines including leptin, adiponectin and interlukin-6 (IL-6). Alteration in circulating adipokines has been shown in ESRD patients. The objective of the study was to clarify the role that adipose tissue and lipoproteins may have in ESRD. The work presented in this thesis has focused on the role of adipose tissue in ESRD patients undergoing haemodialysis and peritoneal dialysis. Both the nutrient and endocrine functions of adipose tissue were addressed in this thesis. Materials and methods: Most studies were carried out on novel in vitro adipocyte assay system developed for these experiments. Novel approaches to investigate ESRD included isolating lipoprotein fractions (VLDL, LDL and HDL) by ultracentrifugation from ESRD and matched human controls followed by incubation with the normal adipocytes in the novel assay system developed for these experiments. One experiment involved collection of human adipose tissue samples. Given the scope of the thesis mainly gene expression data was collected on candidate genes analysed by quantitative real-time PCR in these novel pilot studies. Results: An atherogenic lipoprotein profile was seen in ESRD patients. Haemodialysis patients had increased serum triglycerides and decreased HDL- cholesterol compared to the control subjects. Both haemodialysis and peritoneal dialysis groups had increased VLDL. The lipoprotein pattern in the present study also indicated the peritoneal dialysis group had more atherogenic lipoproteins, IDL and small dense LDL. Expression of lipoprotein lipase, hormone-sensitive lipase and regulatory proteins of lipid metabolism complement protein 3 and low density lipoprotein receptor were downregulated when treated with uraemic lipoproteins in vitro. Serum concentrations of total adiponectin, high molecular weight adiponectin and leptin were significantly higher in the ESRD. Gene expression of adiponectin, IL-6 and leptin was lower in ESRD patients. The results showed a tendency towards an increased accumulation of macro phages in adipose tissue in ESRD patients. Discussion: These findings are strongly suggestive of a defective storage function as well as impaired ability to release fatty acids consistent with dysfunctional adipose tissue in ESRD. These data strongly suggest that normal adipocyte function is altered when exposed to a uraemic environment in vitro. Macrophage infiltration into adipose tissue has been suggested to play role in insulin resistance and systemic inflammation. The results from the modulation of this in vitro adipocyte assay system not only serves as a convenient and unique model to study mechanisms of disease such as ESRD and its treatments but has so far also provided an initial insight that strongly suggests several mechanisms that could contribute to the CVD risk associated with ESRD. Conclusion: An in vitro system to study the effect of uraemic lipoproteins and serum on adipose tissue nutrient and endocrine function through adipocyte gene expression was conducted and compared where available with the corresponding circulating protein measurements. Further studies in ESRD, both by broadening the number of adipocyte genes (and proteins) and undertaking a mechanistic approach to clarifying the reasons for the changes observed would be necessary and informative.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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