1,721,190 research outputs found
Energy, exergy, and environmental analysis for energy intensive industrial equipment in Malaysia / Md. Hasanuzzaman
Full text linkWorldwide, industrial sector accounts for about 35% of the total energy used. In Malaysia, 48% of total energy is used in this sector. Boilers, furnaces and electric motors are the energy intensive equipment of almost every industry and consume a significant amount of energy. The aim of the thesis is analyze the utilization of energy and exergy, energy saving and emission reduction for the energy intensive industrial equipment. In this study, the useful concept of energy and exergy is analyzed to investigate the energy and exergy efficiencies, energy and exergy losses in boilers, furnaces, heat exchangers and economizer. Energy use, energy and bill savings, payback periods and emission reduction of different energy saving options (i.e. economizer, variable speed drive) for boilers, furnaces, and electric motors were analyzed and presented in this thesis.
From the comparative analysis, it is found that the average energy efficiency of the boilers is 68.7%. It is also found that average exergy efficiency of the boilers is 22%. The average energy efficiency of furnaces found to be 30%. The average exergy efficiency of the furnaces has been calculated and found to be 19%. The major exergy destruction was found in the combustion chamber (55%) of the boilers and annealing chamber (62%) of the furnaces. Energy effectiveness of counter flow heat exchangers has been investigated and found to be 65% where the exergy effectiveness found to be 59%. By applying a heat recovery system, about 10% of the boilers and 30% of the furnaces energy can be saved with payback periods less than 1 year in the most cases. The energy effectiveness of economizer varied from 66% to 73%. Exergy effectiveness also calculated and found to be varied from 47% to 65%. It has been estimated that annually 67,868 MWh energy and 4,343,531 US, 57,650,496 US, respectively. Emissions could be reduced by 836,831 tons of CO2, 6217 tons of SO2 and 2285 tons of NOx by motor speed reduction of 60%. By improving the power factor near unity, about 10% of energy can be saved in the Malaysian industrial sector.
Based on the results, it is found that a sizable amount of energy can be saved by applying different energy savings measures and sizable amount of emissions can be reduced with reasonable payback periods
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
New insights into the Manila clam – Perkinsus olseni interaction based on gene expression analysis of clam hemocytes and parasite trophozoites through in vitro challenges
No full textSupplementary Figure S1-5 and Tables S1-12 for manuscript entitled "New insights into the Manila clam – Perkinsus olseni interaction based on gene expression analysis of clam hemocytes and parasite trophozoites through in vitro challenges" by Hasanuzzaman A.F.M., Cao A., Ronza P., Fernández-Boo S., Rubiolo J.A., Robledo D., Gómez-Tato A., Álvarez-Dios J.A., Pardo B.G., Villalba A., Martínez P
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
Energy economics
No full textEnergy economics is a branch of applied economics, and this chapter introduces the basics of energy economics and its principles. It provides a general understanding of the different costs and business models being used in the implementation of energy sector projects. Moreover, energy economics deals with the time value of money—i.e., the potential earning capacity of money after adjusting for interest over time. Different methods to calculate the rate of interest are discussed here in detail. This chapter focuses on the general aspects of energy economics, and its intended impact is not country-specific. Rather, it focuses on the specific design, implementation, project management, financing, and monitoring features of business models and investments. Readers also learn about distributed energy resources in detail. This chapter addresses the barriers to implementing renewable energy to meet the energy needs of the vast population in developing nations. A framework and key barriers are defined here for identifying these barriers
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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