1,721,022 research outputs found
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
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
Liquefied synthetic natural gas from woody biomass. Investigation of cryogenic technique for gas upgrading
No full textBiomass-based liquefied natural gas (bio-LNG) is very valuable renewable fuel as it has high energy density and transportability. Bio-LNG requires liquefaction of the synthetic natural gas (bio-SNG). Cryogenic technology is a promising option for integration of the gas upgrading and liquefaction streams with the main biomass gasification and methane synthesis plant. This thesis investigates the feasibility of this technology for future commercial bio-SNG production plants based on indirect gasification technology, similar to that adopted by Göteborg Energi for the GoBiGas project. Two process configurations for production of bio-LNG from woody biomass are investigated: (1) an integrated configuration which uses cryogenic technology for gas upgrading and liquefaction integrated with the gasification and SNG synthesis plant; (2) a base case which uses a traditional gas upgrading (chemical adsorption) and a stand-alone liquefaction unit located downstream of the main Bio-SNG plant. Both cases are simulated with Aspen Plus to obtain mass and energy balances. Pinch analysis is conducted for both cases to investigate utility demands as well as the potential to convert excess process heat to shaft work to improve the energy performance of the processes. The cryogenic unit investigated achieves the targeted product specifications and capacity, and the calculated performance is comparable to published data for commercial cryogenic units in terms of specific power demand and methane loss. The simulation results show that the integrated plant configuration with cryogenic technology has a higher power requirement than the base case. Shaft power outputs are estimated for both the integrated and base cases assuming a steam cycle combined heat and power unit which recovers process excess heat. The estimated work outputs are more than sufficient to cover the process power demands for both cases; thus the excess power can be exported to the grid. The base case achieves a slightly higher overall energy efficiency compared to the integrated case, whereas the cold gas efficiency is higher for the integrated case due to low methane loss. Cryogenic technology is still under development, therefore there is a high potential for performance improvement by application of energy efficiency measures. In addition, high purity liquid CO2 is produced at very low temperature as a by-product which could generate additional revenue.Outgoin
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
Liquefied synthetic natural gas from woody biomass. Investigation of cryogenic technique for gas upgrading
No full textBiomass-based liquefied natural gas (bio-LNG) is very valuable renewable fuel as it has high energy density and transportability. Bio-LNG requires liquefaction of the synthetic natural gas (bio-SNG). Cryogenic technology is a promising option for integration of the gas upgrading and liquefaction streams with the main biomass gasification and methane synthesis plant. This thesis investigates the feasibility of this technology for future commercial bio-SNG production plants based on indirect gasification technology, similar to that adopted by Göteborg Energi for the GoBiGas project. Two process configurations for production of bio-LNG from woody biomass are investigated: (1) an integrated configuration which uses cryogenic technology for gas upgrading and liquefaction integrated with the gasification and SNG synthesis plant; (2) a base case which uses a traditional gas upgrading (chemical adsorption) and a stand-alone liquefaction unit located downstream of the main Bio-SNG plant. Both cases are simulated with Aspen Plus to obtain mass and energy balances. Pinch analysis is conducted for both cases to investigate utility demands as well as the potential to convert excess process heat to shaft work to improve the energy performance of the processes. The cryogenic unit investigated achieves the targeted product specifications and capacity, and the calculated performance is comparable to published data for commercial cryogenic units in terms of specific power demand and methane loss. The simulation results show that the integrated plant configuration with cryogenic technology has a higher power requirement than the base case. Shaft power outputs are estimated for both the integrated and base cases assuming a steam cycle combined heat and power unit which recovers process excess heat. The estimated work outputs are more than sufficient to cover the process power demands for both cases; thus the excess power can be exported to the grid. The base case achieves a slightly higher overall energy efficiency compared to the integrated case, whereas the cold gas efficiency is higher for the integrated case due to low methane loss. Cryogenic technology is still under development, therefore there is a high potential for performance improvement by application of energy efficiency measures. In addition, high purity liquid CO2 is produced at very low temperature as a by-product which could generate additional revenue.Outgoin
Liquefied synthetic natural gas from woody biomass. Investigation of cryogenic technique for gas upgrading
No full textBiomass-based liquefied natural gas (bio-LNG) is very valuable renewable fuel as it has high energy density and transportability. Bio-LNG requires liquefaction of the synthetic natural gas (bio-SNG). Cryogenic technology is a promising option for integration of the gas upgrading and liquefaction streams with the main biomass gasification and methane synthesis plant. This thesis investigates the feasibility of this technology for future commercial bio-SNG production plants based on indirect gasification technology, similar to that adopted by Göteborg Energi for the GoBiGas project. Two process configurations for production of bio-LNG from woody biomass are investigated: (1) an integrated configuration which uses cryogenic technology for gas upgrading and liquefaction integrated with the gasification and SNG synthesis plant; (2) a base case which uses a traditional gas upgrading (chemical adsorption) and a stand-alone liquefaction unit located downstream of the main Bio-SNG plant. Both cases are simulated with Aspen Plus to obtain mass and energy balances. Pinch analysis is conducted for both cases to investigate utility demands as well as the potential to convert excess process heat to shaft work to improve the energy performance of the processes. The cryogenic unit investigated achieves the targeted product specifications and capacity, and the calculated performance is comparable to published data for commercial cryogenic units in terms of specific power demand and methane loss. The simulation results show that the integrated plant configuration with cryogenic technology has a higher power requirement than the base case. Shaft power outputs are estimated for both the integrated and base cases assuming a steam cycle combined heat and power unit which recovers process excess heat. The estimated work outputs are more than sufficient to cover the process power demands for both cases; thus the excess power can be exported to the grid. The base case achieves a slightly higher overall energy efficiency compared to the integrated case, whereas the cold gas efficiency is higher for the integrated case due to low methane loss. Cryogenic technology is still under development, therefore there is a high potential for performance improvement by application of energy efficiency measures. In addition, high purity liquid CO2 is produced at very low temperature as a by-product which could generate additional revenue.Outgoin
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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