1,721,019 research outputs found
News Ecosystems
No full textThis chapter discusses the notion of “getting outside” the newsroom in the digital age, inspired by Zelizer’s argument that much of what matters about journalism today does not take place in the newsroom itself (Zelizer 2004). It begins with a brief overview of the different ways that scholars have understood this process of getting inside and outside newsrooms. The second part of the chapter argues that we must also consider an additional road forward—the ecosystemic approach to journalism research. It begins with a general overview of the increasing prevalence of the phrase “news ecosystem” in the digital era. It then discusses two uses of the term “ecosystem” in the media studies literature, before outlining several examples of research on emerging news ecosystems, each which draws upon a different, if unacknowledged, theoretical tradition
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Substrate specificity of the human protein phosphatase 2Cdelta, Wip1
No full textWip1, the wild-type p53-induced phosphatase, selectively dephosphorylates a threonine residue on p38 MAPK and mediates a negative feedback loop of the p38 MAPK-p53 signaling pathway. To identify the substrate specificity of Wip1, we prepared a recombinant human Wip1 catalytic domain (rWip1) and measured kinetic parameters for phosphopeptides containing the dephosphorylation sites in p38alpha and in a new substrate, UNG2. rWip1 showed properties that were comparable to those of PP2Calpha or full-length Wip1 in terms of affinity for Mg(2+), insensitivity to okadaic acid, and threonine dephosphorylation. The substrate specificity constant k(cat)/K(m) for a diphosphorylated peptide with a pTXpY sequence was 6-8-fold higher than that of a monophosphorylated peptide with a pTXY sequence, while PP2Calpha showed a preference for monophosphorylated peptides. Although individual side chains before and after the pTXpY sequence of the substrate did not have a significant effect on rWip1 activity, a chain length of at least five residues, including the pTXpY sequence, was important for substrate recognition by rWip1. Moreover, the X residue in the pTXpY sequence affected affinity for rWip1 and correlated with selectivity for MAPKs. These findings suggest that substrate recognition by Wip1 is centered toward a very narrow region around the pTXpY sequence. Three-dimension homology models of Wip1 with bound substrate peptides were constructed, and site-directed mutagenesis was performed to confirm the importance of specific residues for substrate recognition. The results of our study should be useful for predicting new physiological substrates and for designing specific Wip1 inhibitors
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Full text linkWe 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
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