1,721,635 research outputs found
Technology Options for Hybrid-Electric Vehicle Range Extenders
No full textIt’s a fact that air pollution is becoming a global health issue which is leading to multiple fatalities where transportation industry is considered to be one of the major contributor of air pollution. Thus governments across globe are forcing automotive industry to develop newer sustainable technologies. One of the major advancements automotive industry has seen in last couple of decades is the development of fully electric vehicle propulsion technologies. Although fully electric vehicles do not produce major pollutants while operation, the limitation of EVs is the dependency of vehicle on amount of electric charge that can be stored in battery and amount of time it takes for recharging, this limits the electric vehicle’s travel range on a single charge leading to range anxiety among potential users electric vehicles. This issue can easily solved by making use of hybrid vehicle architecture where integration of an auxiliary power source for on-board recharging of the vehicle battery, can lower the dependency of fully electric vehicles on city power grids. Hence work done in this report aims for investigation and comparative evaluation of potential range extender technology solutions that can be used for on-board recharging of the vehicle battery in order to extend the vehicle travel range while also minimizing the emissions through the vehicle.
In order to meet the target, the presented work includes a literature review about identification of various powertrains, range extender options, powertrain modelling software and industrial relevance of the project. Further in this work, a numerical model of 2nd generation Toyota Prius power-split hybrid vehicle has been developed using GT-Suite software and its performance has been validated based on the similarity of CO2 emissions and fuel economy identified from the literature. Here a Microsoft Excel based tool for battery capacity improvement has also developed.
Further based on well-to-wheel analysis and considering research gap, microturbine range extender has been numerically modelled using GT-Suite and validated based on its coherence of the model with power generation capacity and exhaust mass flow rate of ‘C30’ microturbine model by ‘Capstone Turbine Corp.’. In later stages, various methods for NOX and CO emission reduction and integration of developed hybrid Prius and microturbine model have been explored and a proof of concept for microturbine range extended hybrid vehicle has been demonstrated.
Critical analysis performed in this project evaluated emissions of the developed hybrid Toyota Prius model on various legislative and real-world drive cycles and when compared against emissions of conventional vehicle, hybrid vehicle achieved 32.9g/km of CO2 emission reduction. In final stage critical analysis of emissions through microturbine range extender using various renewable and non-renewable fuels including hydrogen gas for the operation was conducted where with Ethanol as fuel, NOx, CO and CO2 emissions were reduced by 3.3g/l, 9.0392g/l and 2846.61g/l respectively in comparison with emission results obtained from hybrid Prius model. Hence, on basis of obtained results in this report, it has been proved that vehicle with equipped with microturbine as range extender can be an optimum solution for range extension of hybrid-vehicles
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
Supplemental Material, ds-vrd-10.1177_2474126418786659 - Longitudinal Follow-Up of Choroidal Thickness in Central Retinal Vein Occlusion With and Without Cystoid Macular Edema
No full textSupplemental Material, ds-vrd-10.1177_2474126418786659 for Longitudinal Follow-Up of Choroidal Thickness in Central Retinal Vein Occlusion With and Without Cystoid Macular Edema by Atalie C. Thompson, Akshay S. Thomas, Adam L. Rothman, Duncan Berry, and Sharon Fekrat in Journal of VitreoRetinal Diseases</p
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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