1,722,201 research outputs found
Visual-haptic interactions in multimodal virtual environments
Get PDFSupervised by Mandayam A. Srinivasan.Also issued as Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.Includes bibliographical references (leaves 73-75).by Wan-Chen Wu
Visual-haptic interactions in multimodal virtual environments
Get PDFThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.Includes bibliographical references (leaves 73-75).by Wan-Chen Wu.S.M
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
Unravelling the metabolic and immunological impacts of helicobacter pylori eradication in healthy adult/youth through omics / Theresa Yap Wan Chen
Get PDFHelicobacter pylori is an important bacterial aetiological agent of gastroduodenal diseases. H. pylori positivity is also a risk factor for gastric adenocarcinoma and MALT
lymphoma. Ironically, accumulating evidence demonstrates that H. pylori may protect
the human host against obesity and atopic disorders. We hypothesised that
disappearance H. pylori leads to changes in the human gut microbiome resulting in local
and systemic changes in metabolism that may contribute to eventual development of
undesirable metabolic and immunological disorders. This study was therefore, carried
out to investigate the implications of H. pylori eradication and the association with
metabolic and immunological disorders in a young healthy adult population. From 573
healthy adult volunteers (18-30 years-old) screened, the prevalence of H. pylori
infection was 9.9%. Eventually, 29 H. pylori-positive subjects were enrolled and
assessed during baseline followed by 6, 12 and 18 months post-H. pylori eradication.
Faecal metagenomics and lipidomics were used to evaluate the local effects following H.
pylori eradication on the gut microbiota and further metabolic, immunological and
plasma metabolomic studies were performed to reflect the systemic effects of H. pylori
eradication. The impact of H. pylori on the human gut microbiome pre- and post
eradication was investigated using 16S rRNA gene (V3-V4 region) sequencing and data
analysis using Qiime pipeline. The local and systemic effects of H. pylori, post
eradication, were examined through untargeted faecal lipidomics and plasma
metabolomics using liquid chromatography mass spectrometry (LC-MS). The effect
of H. pylori eradication on meal-associated changes on gastrointestinal metabolic
hormones, cytokines and Immunolglobulin E (IgE) antibody level were evaluated using
a multiplex bead assay and enzyme-linked immunosorbent assay, correspondingly. The
microbial diversity was found to be similar pre- and post-H. pylori eradication with no
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significant differences in bacterial richness and evenness. Despite that, some changes in
the bacterial communities at the phylum and genus levels were notable, particularly the
decrease in relative abundance of Bacterioidetes and the corresponding increase in
Firmicutes following H. pylori eradication. The significant increase of short-chain fatty
acids (SCFA)-producing bacteria genera could also be associated with increased risk of
metabolic disorders. Faecal lipidomics and plasma metabolomics revealed that
eradication of H. pylori dramatically changed many global metabolite/lipid features,
with the majority of them being down-regulated. The influence of gut microbiota on
plasma metabolites profile was also demonstrated. These findings primarily implicate
the perturbation of gut microbiota following H. pylori eradication in host energy and
lipid metabolism which may eventually lead to the development of metabolic disorders.
Metabolic studies demonstrated that H. pylori eradication was associated with long-term
disturbance in active amylin, pancreatic polypeptide and total peptide YY both pre- and
post-prandially and glucagon-like peptide-1 post-prandially (p<0.05). An inverse
association between H. pylori infection and allergen specific-IgE antibodies (p<0.05)
was observed. The predictive metabolic signature of metabolic and immunological
disorders following H. pylori eradication may give us insights on complex interaction of
H. pylori with gut microbiota, the importance of biosis of the gut microbiota and their implications in human health. In conclusion, eradication of H. pylori demonstrated intricate and complex interactions between H. pylori and the gut microbiota in modulating human health and therefore, a point to ponder upon future management of H. pylori infection
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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