1,721,019 research outputs found
CATALYTIC CO-GASIFICATION OF LIGNOCELLULOSIC BIOMASS IN A DOWNDRAFT GASIFIER USING MINERAL CATALYSTS
No full textPRELIMINARY STUDY OF CO-GASIFICATION OF DIFFERENT LIGNOCELLULOSIC BIOMASS IN BENCH SCALE REACTOR
No full textUtilisation of biomass energy for power generation is a cheapest and environmental
friendly way via gasification technology. However, challenge with biomass
gasification is shortage of feedstock for continuous gasification process which
consequently interruption in power generation. Mixing ofdifferent biomass materials
improved the physical or morphological behaviour of inferior biomass that reduces
the operational instability ofprocess. Co-gasification of different biomass materials
would enable flexible utilisation of solid feedstock in order to obtained uniform gas
composition for power generation applications. The current research focuses on the
co-gasification of different lignocellulosic biomass materials with different blending
ratios for the quality of syngas and performance of the process. Furthermore, the
temperature profile and syngas flare obtained from different blending ratios of
feedstock were studied. Characterization of biomass materials (wood, OPF and
coconut shell) mainly consists ofultimate analysis, proximate analysis, heating value
and elemental analysis were investigated prior to experiments. The co-gasification
study was carried out in a batch feed downdraft gasifier. The syngas composition
(CO, H2, CH4 and C02) from each experiment was analyzed using Emerson X-Stream
online gas analyzer
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
Steam gasification of polyethylene terephthalate (PET) with a focus on investigating effects of calcium oxide, recycled feedstock and bed material
Full text linkPlastic pollution is still a problem as it causes negative environmental health effects, and the increasing demand for plastics contributes to the increase of greenhouse gas emissions. Polyethylene Terephthalate (PET) is a type of plastic commonly used to manufacture beverage bottles, various household containers, single use take-away packaging etc., and while mechanical recycling technology is relatively mature, there is still a significant amount of PET that reaches its end of life in landfill or incineration plants. Gasification is one promising thermochemical method to recover useful products from end-of-life PET. This work investigated the effects of calcium oxide feedstock types, and bed material types on product yields from steam gasification of PET, which have not been studied in previous research. A bubbling fluidized bed gasifier was used, and the products (gas, tars, and solid residue) were analyzed. The results showed that in the presence of CaO, higher gas yield and lower tar yield were obtained due to the catalytic effect of CaO on steam reforming of tar. When recycled PET granulates or flakes were used, the gas yields did not vary significantly compared to virgin PET, which means our previous research regarding virgin PET could be directly applied to recycled PET. When CaO was in the bed instead of being fed with PET, the hydrogen yield was higher. Compared to CaO, calcined dolomite seems less effective in boosting hydrogen yield, probably due to its lower mechanical strength which leads to fragmentation and elutriation. All these insights could subsequently be incorporated in future modelling and experimental studies, and larger scale applications on steam gasification of PET
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
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