1,720,971 research outputs found
Surveying Italian and International Baccalaureate Teachers to Compare Their Opinions on System Concept and Interdisciplinary Approaches in Chemistry Education
No full textThis paper focuses on system concept use in teaching either chemical core concepts or interdisciplinary chemistry-related topics. The system concept is important in order to develop global competences, and chemistry teaching plays a key role in this context. A questionnaire has been administered to two different samples, Italian teachers and International Baccalaureate (IB) teachers, in order to investigate their opinions about the issues involved. The most significant differences and similarities emerging from the survey have been analyzed mostly by dendrograms and then commented on. With due caution, it is possible to suppose similar attitudes in the two groups of teachers except for some aspects. For example, the analysis of system concept knowledge within pure chemistry highlights some deficiencies: Italian teachers in particular show a low level of epistemological awareness about the systemic character of chemistry, whereas its knowledge would allow not only a chemistry teaching improvement but also a productive use of chemical explanations in other scientific and nonscientific fields, especially in the social sciences; as a consequence, it would facilitate interdisciplinary teaching. Therefore, science teachers need epistemological insight into chemical systemic aspects, that may be provided by high quality textbooks and training initiatives focusing on the systemic character of chemistry and its interdisciplinary connections. In an analysis of chemistry teachers only, Italian teachers support interdisciplinary teaching more strongly than IB teachers, despite the rigidity and the state of crisis of the Italian education system, often attributed to a lack of broad-minded teachers. This evidence indicates a promising resource for the Italian education system. Moreover, a similar kind of questionnaire can be utilized by other education researchers in order to isolate and analyze some teachers' attitudes regardless the very different education systems in which every sample works
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
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
Preparation of solid state samples of a transition metal coordination compound for synchrotron radiation photoemission studies
No full textDonor properties of diphosphine ligands in tungsten carbonyl complexes: synchrotron radiation XPS measurements and DFT calculations
No full textSynchrotron radiation XPS measurements of W 4f and P 2p core level binding energies in the series W(CO)4(P−P) (P−P = dppm (1), dppe (2), dppp (3), dppb (4), dmpe (5), F-dppe (6); dppm = bis(diphenylphosphino)methane, dppe = 1,2-bis(diphenylphosphino)ethane, dppp = 1,3-bis(diphenylphosphino)propane, dppb = 1,4-bis(diphenylphosphino)butane, dmpe = 1,2-bis(dimethylphosphino)ethane, F-dppe = 1,2-bis(bis(pentafluorophenyl)phosphino)ethane) are reported. The results are interpreted in terms of effects of the chelate ring size and of the nature of substituents of the P atoms. The trend of XPS data show an excellent agreement with the results of DFT calculations, obtained by the ΔSCF approach. Further analysis of the Kohn−Sham eigenvalues calculated at the ground-state level has assessed the role played by the initial state effects
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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