1,720,959 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
Structural biology studies of thylakoid lumen proteins required for photosystem II assembly and function
No full textLittle is known about the structures and functions of thylakoid lumen proteins. However, some of these proteins have an essential role in photosynthesis. Photosystem II (PSII) complexes are embedded in the thylakoid membrane of oxygenic photosynthetic organisms and one of the central subunits, the D1 protein, is damaged by light during the light driven water – splitting reaction and must be replaced frequently. One of the thylakoid lumen proteins that is essential for assembly and renewal of PSII complexes is the High Chlorophyll Fluorescence 136 (HCF136) protein. Another important protein for the PSII complex assembly is the Low PSII Accumulation Protein 19 (LPA19). Both proteins, HCF136 and LPA19, were shown to bind to the core subunits of the PSII complex from the lumenal side and LPA19 has been shown to explicitly interact with the soluble C-terminus of the D1 protein, one of the core PSII complex proteins. Prior to the replacement of the damaged D1 protein, the PSII complex needs to be disassembled, which is done with the help of the Maintenance of Photosystem II under High light 2 (MPH2) protein. MPH2, also called TL16, is required during the repair cycle of the PSII complex particularly under increased and fluctuating light conditions. In this work I have determined the three-dimensional X-ray structures of the HCF136 protein at 1.6 Å resolution and the LPA19 protein at 1.2 Å resolution and have also biochemically analyzed possible interactions of HCF136 with the C-termini of D1 protein. In addition, we have determined the NMR structure of the MPH2 protein. The protein structures of HCF136, LPA19, and MPH2 determined from A. thaliana provide us with a starting point for further studies to improve our understanding of their functional roles in the assembly, maintenance, disassembly and renewal of the PSII complex. The structures are revealing the molecular details that are particularly important during the design of mutations to study protein-protein interactions and the binding of co-factors. Furthermore, I have contributed to the characterization of AnPrx6, the 1-Cyx peroxiredoxin from Anabaena sp. 7120. Peroxiredoxins are important caretakers of reactive oxygen species and a homolog PrxQ in A.thaliana is found in the thylakoid lumen. The dimeric AnPrx6 protein revealed different active site residues conformations in each of the dimers, which is probably coupled to its enzymatic activity. Unexpectedly, the protein acted also as a chaperone and showed chaperone activity in its dimeric state, which is a novelty for Prx proteins
Critical Thinking and Ethics in School Genetics Education; An Analysis of Australian Curricula
No full textDetta arbete undersöker integrationen av kritiskt tänkande och etiska diskussioner i genetikundervisningen inom den australiensiska läroplanen, med fokus på skillnader mellan delstater och nationella riktlinjer. Genom att använda Blooms taxonomi analyseras hur undervisningen struktureras i olika läroplaner. Syftet är att kartlägga variationer i genetikundervisningen mellan olika delstater och granska hur den uppdaterade australiensiska läroplanen (version 9, år 2023) adresserar tidigare identifierade brister (version 8.4, år 2010) att främja kritiskt och etiskt resonemang. Arbetet bygger på dokumentanalys av både nationella och delstatliga styrdokument, och resultaten relateras till den svenska läroplanen för att erbjuda en bredare kontext. Analysen visar att tre delstater: Victoria, New South Wales and Queensland utmärker sig genom att ha investerat i en mer detaljerad och genomarbetad läroplan, vilket tydligt prioriterar etiska resonemang och kritisk analys. Delstaten Victoria har särskilt avancerat i avsnittet om genetik med något tydligare vägledning för lärarna. Studien framhåller att den nya australiensiska läroplanen innebär en betydande förbättring, men att det finns osäkerhet kring implementeringen, särskilt gällande resurser och lärarfortbildning. I jämförelse med den svenska läroplanen framstår den australiensiska som mer specifik och utvecklad i frågan om etik och kritiskt tänkande inom avsnittet om genetik. Den svenska läroplanen behandlar dessa frågor på ett mer generellt plan inom naturvetenskap, utan att explicit adressera genetik i samma utsträckning
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
Critical Thinking and Ethics in School Genetics Education; An Analysis of Australian Curricula
No full textDetta arbete undersöker integrationen av kritiskt tänkande och etiska diskussioner i genetikundervisningen inom den australiensiska läroplanen, med fokus på skillnader mellan delstater och nationella riktlinjer. Genom att använda Blooms taxonomi analyseras hur undervisningen struktureras i olika läroplaner. Syftet är att kartlägga variationer i genetikundervisningen mellan olika delstater och granska hur den uppdaterade australiensiska läroplanen (version 9, år 2023) adresserar tidigare identifierade brister (version 8.4, år 2010) att främja kritiskt och etiskt resonemang. Arbetet bygger på dokumentanalys av både nationella och delstatliga styrdokument, och resultaten relateras till den svenska läroplanen för att erbjuda en bredare kontext. Analysen visar att tre delstater: Victoria, New South Wales and Queensland utmärker sig genom att ha investerat i en mer detaljerad och genomarbetad läroplan, vilket tydligt prioriterar etiska resonemang och kritisk analys. Delstaten Victoria har särskilt avancerat i avsnittet om genetik med något tydligare vägledning för lärarna. Studien framhåller att den nya australiensiska läroplanen innebär en betydande förbättring, men att det finns osäkerhet kring implementeringen, särskilt gällande resurser och lärarfortbildning. I jämförelse med den svenska läroplanen framstår den australiensiska som mer specifik och utvecklad i frågan om etik och kritiskt tänkande inom avsnittet om genetik. Den svenska läroplanen behandlar dessa frågor på ett mer generellt plan inom naturvetenskap, utan att explicit adressera genetik i samma utsträckning
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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