1,721,019 research outputs found
Sustainable Alternative Syngas Fuel
Get PDFThe development and use of sustainable and alternative fuels (syngas, biogas, biodiesel, bio-oil, hydrogen) derived from sources other than petroleum is needed due to the limited fossil fuel resources, the need for reduction of atmospheric greenhouse gas emissions, energy security, and to meet the future high energy demand due to population growth. New alternative fuels that can be produced locally and derived from renewable sources will be more sustainable compared to fossil fuels. Alternative and renewable fuels can be produced using different thermochemical and bio-chemical processes. Gasification is a thermochemical process used to produce syngas fuel (mainly hydrogen and carbon dioxide) from renewable (biomass) and conventional (coal) sources. The syngas fuels produced from the gasification process can be used for different applications: power generation (combustion of syngas fuel in gas turbine engines), heating, and transportation (internal combustion engines). This book intends to provide the reader with an overview of the current technologies, methods, and strategies of syngas fuel production, characterization, and application
Research Advances in Syngas
No full textResearch Advances in Syngas sheds light on the potential of this versatile gas blend derived from sources like coal, biomass, and even waste. Immerse yourself in the research. Unlock the door to a future powered by cleaner and more sustainable energy. This comprehensive volume takes you on a journey through the forefront of syngas innovation. Embark on its evolution from a relic to a potential champion in clean energy. Then, delve into the science behind it, examining how different materials are transformed into fuel while uncovering strategies for environmentally friendly production. Research Advances in Syngas doesn't confine itself to laboratories; it also explores the aspects of syngas integration, providing insights into market forces and paving the way for cost-effective implementation. Moreover, looking ahead to tomorrow, discover how this technology not only generates energy but also actively removes carbon dioxide—a glimpse into a truly sustainable future. Research Advances in Syngas is a roadmap towards a cleaner and more prosperous future. If you care about our planet’s well-being, this book is an essential guide to harnessing syngas power and illuminating our path towards a brighter and more sustainable tomorrow
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
SYSTEMATIC DESIGN ALGORITHM FOR ENERGY EFFICIENT AND COST EFFECTIVE HYDROGEN PRODUCTION FROM PALM WASTE
No full textThe energy crisis and environmental issues caused by fossil fuels usage have brought
new light on hydrogen as a potentially significant form of energy in the future. The
idea of producing hydrogen from oil palm biomass in Malaysia seems attractive due
to the resource abundance. Biomass steam gasification with in-situ carbon dioxide
capture in the presence of catalyst has good prospects for the enhanced production of
hydrogen rich gas. Despite these potentials, its application at industrial scale is limited
due to the energy intensiveness, costs and hazards of gasification process at high
temperatures (>823K). Modelling and optimization become an increasingly attractive
design approach to investigate the gasification performance within an extensive range
of operating parameters. However, the existing design methods are limited to allow
simultaneous and integrated assessment of process performance, heat efficiency and
costs.
In the current study, a systematic autonomous algorithm incorporating reaction
kinetics model, flowsheet calculations, heat integration analysis and economic
evaluation, has been developed to calculate optimum parameters giving minimum
hydrogen production cost using optimization strategies. A simplified flowsheet has
been developed for hydrogen production from biomass via catalytic steam gasification
with in-situ carbon dioxide capture. A first order reaction kinetics model was next
developed to represent the reactions occurring in the gasification system. The heat
integration model based on mixed integer non-linear programming was also
developed to minimize the utility cost and heat exchanger area cost for the
gasification system to incorporate energy efficiency evaluation. A cost minimization
work on the ±1owsheet subject to the reaction kinetics behaviour, mass and energy
balances and minimum utility cost, to obtain the optimal parameters, has been
conducted. In addition, experimental work has been performed using a gasification
unit to obtain the reaction kinetics parameters
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Get PDFWe 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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