1,720,954 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
The Role of MBK-2 and CDK-1 in Oocytes and Early Embryos of pam-1 Mutant C. elegans
No full textThe puromycin-sensitive aminopeptidase, PAM-1, is needed for meiotic exit and anteroposterior axis formation in early Caenorhabditis elegans embryos. PAM-1 is also involved in oocyte maturation and the oocyte-to-embryo transition. How PAM-1 regulates these activities remains unknown. In this study, two proteins, MBK-2 and CDK-1, are studied to investigate their relationship with PAM-1. MBK-2 is a protein kinase that regulates the degradation of MEI-1, a katanin-related protein, during meiotic exit, and transduces polarity signals that control asymmetric division. In oocytes and early embryos of wildtype C. elegans, MBK-2 is found along the perimeter of the late-stage oocytes. After activation, it breaks down and speckles throughout the embryos, with the amount of speckling decreasing before the first mitosis. CDK-1 is a cyclin-dependent kinase that has feedback loops with two proteins, WEE-1.3, which negatively regulates it, and CDC-25.1 which positively regulates it. This protein is activated in late-stage oocytes to allow them to mature. Since MBK-2 and CDK-1 are both involved in processes that PAM-1 regulates, we hope to uncover how they may work together. Through studying them in wildtype and pam-1 mutant C. elegans, we hope to gain insight into their roles in developmental processes and better understand PAM-1. C. elegans with the appropriate components tagged with GFP were imaged using a Nikon EZ-C3 Confocal Microscope. We saw that MBK-2 breaks down faster in pam-1 C. elegans when compared to wildtype and that MBK-2 breakdown begins immediately after protrusion of the first polar body. cdk-1(RNAi) was seen to affect wildtype and pam-1 C. elegans similarly during oocyte maturation, but additional study is needed to see if there is a potential interaction between PAM-1 and CDK -1. From the results of this study and others, there is a possibility that PAM-1 interacts with MBK-2 and CDK-1 by directly or indirectly activating these proteins or WEE-1.3 and CDC-25.1. We noted that mutant pam-1 leads MBK-2 to break down faster, showing that PAM-1 is likely working upstream of this kinase to lead to its defect
The Role of MBK-2 and CDK-1 in Oocytes and Early Embryos of pam-1 C. elegans
No full textThe puromycin-sensitive aminopeptidase, PAM-1, is needed for meiotic exit and anteroposterior axis formation in early Caenorhabditis elegans embryos. PAM-1 is also involved in oocyte maturation and the oocyte-to-embryo transition, making it of particular interest to study because of its association with infertility and Alzheimer’s disease in a human homolog. In this study, two proteins, MBK-2 and CDK-1, are studied to investigate their relationship with PAM-1. MBK-2 is a protein kinase that regulates the degradation of MEI-1, a katanin-related protein, during meiotic exit, and transduces polarity signals that control asymmetric division. In oocytes and early embryos of wildtype C. elegans, it is found along the perimeter of the last 2-3 late-stage oocytes. It then speckles throughout the embryos, with the amount of speckling decreasing after reaching position 2. CDK-1 is a cyclin-dependent kinase that has feedback loops with two proteins, WEE-1.3 and CDC-25.1, where CDC-25.1 counteracts WEE-1.3 by activating CDK-1. This protein is found in late-stage oocytes, and this research studies its presence in nucleoli. MBK-2 and CDK-1 are both involved in processes that PAM-1 regulates. Through studying them in wildtype and pam-1 mutant C. elegans, we hope to gain insight into their roles in developmental processes and better understand PAM-1
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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