1,721,655 research outputs found
Tagging of Biomedical Articles on CiteULike: A Comparison of User, Author and Professional Indexing
Get PDFThis paper examines the context of online indexing from the viewpoint of three different groups: users, authors, and professional indexers. User tags, author keywords and descriptors were collected from academic journal articles, which were both indexed in Pubmed and tagged on CiteULike, and analysed. Descriptive statistics, informetric measures, and thesaural term comparison shows that there are important differences in the use of keywords between the three groups in addition to similarities which can be used to enhance support for search and browse. While tags and author keywords were found that matched descriptors exactly, other terms which did not match but provided important expansion to the indexing lexicon were found. These additional terms could be used to enhance support for searching and browsing in article databases as well as to provide invaluable data for entry vocabulary and emergent terminology for regular updates to indexing systems. Additionally, the study suggests that tags support organisation by association to task, projects and subject while making important connections to traditional systems which classify into subject categories
Characterization of anti-mineralocorticoid receptor antibody (SC-11412) and its use in chromatin immunoprecipitation (ChIP) assay.
No full text<p>[<b>A</b>] <i>Characterization of SC-11412 antibody</i>: The CHOK1 cells were transfected with vector (<b>lane-1</b>) or the vector containing a mineralocorticoid receptor (MR) (<b>lane-2</b>), labeled with <sup>35</sup>S-methionine, immunoprecipitated with SC-11412 antibody to MR, resolved on SDS-PAGE, and the gel used to expose X-ray film. [<b>B</b>] <i>Immunoprecipitation of MR-like proteins from rat colonic epithelial cells</i>: Protein extracts of the colonic epithelial cells from an aldosterone rat was immunoprecipitated with the control (<b>lane-1</b>) or the SC-11412 (<b>lane-2</b>) antibody. The immnoprecipitated proteins were resolved on SDS-PAGE and transferred to the nitrocellulose membrane and probed with the SC-11412 antibody. [<b>C</b>] <i>ChIP assay of MR</i>: Numbers on the X-axis represent primer pairs directed to 1 kb blocks starting at approximately 20 kb upstream (number-1) of the Kcnn4 presumed transcript start site (TSS) and extending to 10 kb downstream (number-29) of the presumed TSS (located in block 21). The Y-axis represents fold enrichment in the RT-PCR comparing the specific to the control antibody. Data presented represents mean ± SE of 4 independent experiments using distal colon epithelial cells from aldosterone (<b>closed bars</b>) and normal rats (<b>open bars</b>). The RNA transcript is indicated by an arrow. The presumed promoter region is immediately to the left of the arrow. Exons 1 and 2 are indicated by blocks. Genomic regions cloned in pGL4.23 are indicated by bars and are numbered.</p
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
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