1,720,986 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
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
Explosive Characteristics of Li-ion battery Vent Gases with Inert Gas Addition
No full textLithium-ion batteries have excellent performance and high energy density, leading them to be used in electronic devices, electrical vehicles, marine applications and for energy storage. These batteries pose safety concerns as they have the potential to release combustible materials. In some failure events, the cells in the battery could undergo thermal runaway, which can result in the release of combustible materials. Explosion and fire mitigating systems are used to mitigate the possibility and severity of an accidental explosion.
The inert gas system with the extinguishing agent Inergen could have an effect on the explosive characteristics of Li-ion battery vent gases and thus reduce the explosion hazards. To evaluate the effectiveness of Inergen, this thesis have determined the upper and lower explosive limits, maximum explosion pressure, maximum rate of explosion pressure rise and deflagration index of two potential Li-ion battery vent gases. A 20-litre explosion sphere was used to evaluate the explosive characteristics of the Generic Li-ion and High LBV Li-ion gases in air with the addition of Inergen at 300 K and 100 kPa (absolute). Hydrogen has been used to verify the experimental setup and procedure.
The explosive limits of the Generic Li-ion and High LBV Li-ion gases have been determined in relation to the fuel, oxygen and Inergen concentrations and the inert to air relation. The results suggests that the addition of Inergen might cause both gases to ignite at lower oxygen concentrations compared to the absence of Inergen. The results of the Generic Li-ion gas indicates that the addition of Inergen have the potential to significantly reduce the intensity and severity of an explosion. For the High LBV Li-ion gas, the results demonstrates that the addition of Inergen is effective in reducing the maximum explosion pressure and deflagration index, but may not be effective in mitigating the severity of an explosion.
The addition of Inergen will not be effective in completely mitigating the explosion hazards related to these Li-ion battery vent gases. However, the addition of Inergen has the potential to significantly reduce the maximum pressure, maximum rate of pressure rise and deflagration index. The addition of Inergen has a better mitigating effect on the Generic Li-ion gas compared to the High LBV Li-ion gas
CFD-Simulation of Hydrogen Jet Flames
Full text linkHydrogen has the potential to transform various industries as a promising energy source. Its versatility and clean-burning properties make it an attractive option for reducing emissions in power generation, transportation, maritime activities, and heavy industries. By integrating hydrogen into these sectors, we can move towards a more sustainable and environmentally friendly energy landscape. However, hydrogen's flammability presents significant risks, potentially causing severe infrastructure damage and posing dangers to human safety. Therefore, robust safety measures and advanced technologies are crucial to mitigate these risks and fully harness hydrogen's potential.
The primary objective of this thesis has been to conduct a numerical study of these experiments using the CFD tool OpenFOAM. This includes evaluating how well the software performs and exploring the use of a notional nozzle in the simulations.
OpenFOAM proves to be an effective tool for simulating high-pressure hydrogen jets, although the computational resources available impose constraints that make it challenging to accurately resolve flows at the speed of sound. The potential impact related to reducing the speed to maintain numerical stability should be further investigated to ensure the accuracy and reliability of the simulations.
Overall, the implementation of a notional nozzle demonstrates significant potential for simulating high-pressure hydrogen jets using OpenFOAM. However, further simulations are necessary to provide a more comprehensive understanding before any final conclusions can be made regarding the effectiveness of this approach. Due to the time-
consuming nature of the simulations, only 1.8 seconds were simulated in this project. This limited runtime resulted in insufficient data points, but it is was evident that the temperature stabilises and decreases after some time, something which correlates well with experiments conducted. Future simulations with longer runtimes could provide more detailed insights
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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