1,721,109 research outputs found
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
CO2 capture using liquid crystals: Selectivity analysis for CO2 capture from syngas
No full textThe current need to reduce CO2 emission from power plant flue gas demands development of new and more energy efficient separation processes. Liquid crystals are a new class of solvents for CO2 absorption; making use of a solubility switch between two phases. Solubility of CO2 is higher in the isotropic liquid phase than in the structured liquid phase. Phase transition enthalpy between both phases is low and therefore CO2 capture with liquid crystals has the potential to consume less energy in an absorption/desorption cycle than conventional CO2 capture processes. Liquid crystals enable precombustion CO2 capture at high pressures, hence the capture process can be used for CO2 capture from syngas; gas mainly consisting of CO2 and H2. At this stage research is focused on ideal selectivity and especially on the solubility of CO2 in liquid crystals. Literature study is conducted on experimental phase behaviour of liquid crystal like structures to validate the Predictive Soave-Redlich Kwong equation of state. The Predictive Soave-Redlich Kwong equation of state is used to predict phase behaviour of different liquid crystals with H2 and CO2 to identify the most promising molecular structures, resulting in a selectivity analysis. In the Thermodynamics Laboratory (Process & Energy department, TU Delft) the binary mixtures of pentyl cyanobipenyl, heptyloxy cyanobiphenyl, ethyl propyl bicyclohexyl, propyl butyl bicyclohexyl, hexyloxybenzylidene aminobenzonitrile and phenyl cyclohexyl with CO2, and the binary mixtures of ethyl propyl bicyclohexyl, phenyl cyclohexyl and heptyloxy cyanobiphenyl with H2 are measured using a Cailletet setup. Henry coefficients obtained from the experimental data indicate the solubility of the different structures. Accuracy of the bubblepoint curve prediction by the Predictive Soave-Redlich Kwong equation of state is higher for small molecular structures at relatively low temperatures. The vapour liquid equilibrium prediction has larger deviations for binary mixtures with acetate structures in combination with CO2 and for all binary mixtures with H2; however the bubblepoint curve order is maintained in the vapour liquid equilibrium prediction. The Predictive Soave-Redlich Kwong equation of state simulation predicts that highest solubility for both CO2 and H2 with bicyclohexyl based structures and the lowest with biphenyl based structures. From the Predictive Soave-Redlich Kwong equation of state simulation it is found that more polar structures increase the solubility of both CO2 and H2. The experimental results measured in the Cailletet setup underline the predictions made with the PSRK simulation and demonstrate that weakly polar structures (PCH-type) have a higher solubility of CO2. Highly polar structures (7OCB) are also demonstrating high solubility of CO2 in the Predictive Soave-Redlich Kwong equation of state simulation and experiments. Simulation of the experimental liquid crystals with the Predictive Soave-Redlich Kwong equation of state shows prediction of bicyclohexyl structures phase behaviour is more accurate than predicting phase behaviour of biphenyl and cyclohexylbenzene based structures.EThP&EMechanical, Maritime and Materials Engineerin
Omnibus survey Nieuwegein 2000 - VSO
No full textSurvey among the inhabitants of Nieuwegein. Social engagement / social environment, networks / environmental issues / transport / Nieuwegein Radio Background variables: basic characteristics/ housing situation/ household characteristics/ educatio
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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