1,720,979 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
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Utilizing Fluorescence Microscopy to Characterize the Subcellular Distribution of the Novel Protein Acheron
No full textAll cells carry the genetic machinery required to commit cell suicide; a process known as programmed cell death (PCD). While the ability to initiate PCD serves a number of useful purposes during development and homeostasis, misregulation of PCD is the underlying basis of most human diseases, including cancer, autoimmunity disorders and neurodegeneration. Using the tobacco hawkmoth Manduca sexta as a model organism, the Schwartz lab at UMass has demonstrated that PCD requires de novo gene expression and has cloned many death-associated genes. One of these genes encodes a novel protein that was named Acheron after one of the rivers of the Underworld in Greek mythology. Acheron (also known as Lupus Antigen Related Protein 6; Larp6) is an RNA binding protein that mediates a number of cellular processes, including cell survival, angiogenesis, migration, and differentiation. The molecular mechanisms that mediate Acheron’s diverse roles are poorly understood, but several lines of evidence suggest that it is mediated in part by protein protein interactions and motifs that target it to different cellular compartments. In this thesis, I employed immunofluorescence and confocal microscopy to conduct two studies employing mammalian cells. The first study was to determine the subcellular localization for Acheron in normal cells and cells treated with growth factors. I found that Acheron predominantly coincides with the microtubule cytoskeleton. In our second study, I tested the hypothesis that Acheron’s binding partners BAD, Human Homolog of Ariadne-1 (HHARI) and Calcium/Calmodulin-dependent Serine Protein Kinase (CASK) colocalize with Acheron. As part of this analysis, I sought to determine if Acheron could facilitate the translocation of CASK to the nucleus. I found that Acheron localizes predominantly to microtubules, with some expression in the cytoplasm and nucleus. When Acheron and its partners are co-labeled in cycling mouse C2C12 myoblasts or human U2-OS osteosarcoma cells, Acheron did not colocalize with BAD, HHARI or CASK on microtubules. However, I found that when Acheron is driven into the nucleus with high levels of growth factors, CASK also appeared to translocate to both the nucleus and to microtubules, where it colocalized with Acheron. The data acquired through these studies should provide not only insights into the subcellular distribution of Acheron and its potential binding partners but may also help elucidate its roles in programmed cell death, differentiation, and pathogenesis in mammalian models.Master of Science (M.S.
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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