1,721,212 research outputs found
YPFS Lessons Learned Oral History Project: An Interview with Simon Potter
Full text linkSuggested Citation Form: Potter, Simon. 2022. “Lessons Learned Interview by Maryann Haggerty, April 13, 2021. Yale Program on Financial Stability Lessons Learned Oral History Project. Transcript. https://ypfs.som.yale.edu/library/ypfs-lesson-learned-oral-history-project-interview-simon-potte
Fluid phase coexistence by molecular simulation
No full textMolecular dynamics (MD) computer simulations have been performed on a variety of molecular systems at the liquid/vapour and liquid/liquid interfaces.A potential model has been developed for the liquid/vapour equilibria of fluoromethanes using the direct MD method of simulating the two phases in contact. This potential has been shown to be transferable by giving a good fit to the experimental coexistence properties for the three fluids CH2F2, CHF3 and CF4. The models show good agreement with the coexisting densities, latent heats and vapour pressures. Additionally, a reasonable fit to the radial distribution function g(r), obtained from coherent neutron scattering, is observed for CH2F2 and CHF3. The model fits the experimental data especially well for CHF3.The transferable model has been applied to the study of the liquid/vapour coexistence of the CHF3/CF4 mixture. It was found that the MD timescale is far too slow for the determination of phase equilibria using the direct method. While the total bulk densities of the liquid and vapour phases are quickly established there are fluctuations in the local concentrations which do not average out quickly. Unfortunately the model does not appear to 'transfer' to the case of the mixture: the mole fractions of the two coexisting densities poorly match those of experiment at the same temperature and pressure. The simulations have been used to determine the surface tension and orientational ordering at the surface and to predict the experimental neutron reflectivity profile.A simulation has been performed of the liquid/liquid interface of water/1,2-dichloroethane. This work has revealed some insights into the ordering of molecules at the interface. Comparisons have been made in particular with the results of MD simulations at the liquid/vapour interface of pure water. The distribution of the water dipoles is very similar to that at the free liquid/vapour interface and shows too different preferred orientations either side of the surface. We have also calculated the surface tension which is found to be significantly larger than the experimental value and must be due to a deficiency in the model.</p
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
