1,725,076 research outputs found
Arbeid op Lagekostenbedrijf benadert doelstelling van 50 uur per week
No full textDe totale bedrijfsvoering werd in 1998 rondgezet in 51 uur per week. Naast loonwerk werd per koe 52 uur per week besteed. Bijna eenderde van de totale werktijd kwam voor rekening van het melken
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
De 10.000 uur van de leraar
No full textHet kost ongeveer 10.000 uur ergens specialist in te worden. Hoe werkt dat in het leraarschap? HvA-lector Marco Snoek vraagt zich in een column voor Scienceguide af waarom een masteropleiding voor leraren niet gewoon verplicht wordt
Migranten van het eerste uur krijgen eindelijk juiste aandacht
No full textArtikel 'Migranten van het eerste uur krijgen eindelijk juiste aandacht' op homepage van online platform Sociale vraagstukken d.d. 9 maart 2019, auteur Tineke Fokkema, naar aanleiding van het uitspreken van haar oratie aan de Erasmus Universiteit Rotterdam ter gelegenheid van haar benoeming tot bijzonder hoogleraar 'Ageing Families and Migration' bij de 'Erasmus School of Social and Behavioural Sciences' vanwege het Nederlands Interdisciplinair Demografisch Instituut (NIDI-KNAW). https://www.socialevraagstukken.nl/migranten-van-het-eerste-uur-krijgen-eindelijk-juiste-aandacht
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
Recognition of human mitochondrial tRNALeu(UUR) by its cognate leucyl-tRNA synthetase.
No full textInternational audienceAccuracy of protein synthesis depends on specific recognition and aminoacylation of tRNAs by their cognate aminoacyl-tRNA synthetases. Rules governing these processes have been established for numerous prokaryotic and eukaryotic cytoplasmic systems, but only limited information is available for human mitochondrial systems. It has been shown that the in vitro transcribed human mitochondrial tRNA(Leu(UUR)) does not fold into the expected cloverleaf, but is however aminoacylated by the human mitochondrial leucyl-tRNA synthetase. Here, the role of the structure of the amino acid acceptor branch and the anticodon branch of tRNA(Leu(UUR)) in recognition by leucyl-tRNA synthetase was investigated. The kinetic parameters for aminoacylation of wild-type and mutant tRNA(Leu(UUR)) transcripts and of native tRNA(Leu(UUR)) were determined. Solution structure probing was performed in the presence or in the absence of leucyl-tRNA synthetase and correlated with the aminoacylation kinetics for each tRNA. Replacement of mismatches in either the anticodon-stem or D-stem that are present in the wild-type tRNA(Leu(UUR)) by G-C base-pairs is sufficient to induce (i) cloverleaf folding, (ii) improved aminoacylation efficiency, and (iii) interactions with the synthetase that are similar to those with the native tRNA(Leu(UUR)). Leucyl-tRNA synthetase contacts tRNA(Leu(UUR)) in the amino acid acceptor stem, the anticodon stem, and the D-loop, which is unprecedented for a leucine aminoacylation system
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