1,720,955 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
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
On-site energy generation for a decarbonized Irish manufacturing industry
No full textThe objective of the thesis is to explore whether it is technically, economically and en-vironmentally feasible for an Irish manufacturing facility to become an energy prosumer, byproducing energy on-site, and decrease the environmental impact of its electric and thermalenergy demand as the energy sector is progressively decarbonized. A new model has been de-veloped and implemented in Matlab in this thesis. It allows to simulate the techno-economicand environmental feasibility of on-site energy generation for a manufacturing facility throughan integrated Variable Renewable Energy (VRE) system and a Combined Heat and Power(CHP) system. The model is built as a robust and flexible tool that can be used for any fa-cility worldwide by updating inputs such as geographical location, solar and wind availabilityand hourly energy demand. The implemented model allows also to evaluate the feasibility ofon-site energy generation in possible future scenarios by conducting a sensitivity analysis ofparameters that may change in the future, such as discount rate, commodities price and gridcarbon intensity.An existing Irish manufacturing facility has been used as a real case study to providerealistic data as input to the analysis, capturing real requirements and constraints that char-acterize this type of end-user. The first option investigated to decarbonize the electric loadof the facility is an on-site VRE system composed of solar PV and wind turbines. The mod-elled VRE system results technically viable but not economically feasible in isolation: its PayBack Time is too high (PBT >25 years) to be attractive for a manufacturing facility andit would remain unattractive even with substantial subsidies and a reduction in the capitalcost of VRE technologies. The second option investigated, both to economically support theon-site VRE system and to decarbonize the thermal energy load of the facility, is to add anon-site CHP system. The integrated system results to be both technically and economicallyfeasible with aPBTclose to 6 years. However, the environmental benefits of reducing carbonemissions by producing energy for self consumption on-site are limited in time: if the projectwas to be commissioned in 2020, the cumulative emissions savings would become negativein 2040 as the electric grid is progressively decarbonized, creating a potential misalignmentbetween decarbonizing policies and the manufacturing facility’s economic strategy. Anotherissue arises with the installation of the on-site system: the almost constant electric load ofthe manufacturing facility becomes more variable and difficult to predict due to the intermit-tency of renewable sources. Despite its inherent operating flexibility, the CHP system doesnot significantly reduce the occurrence of high fluctuations in the residual electric load thatthe grid has to cover.It is concluded that a techno-economic opportunity does exist for on-site energy cogener-ation in the Irish manufacturing industry, however the environmental benefits are limited intime. The effects on the electric grid of a switch from a predictable and constant load to amore variable one should be considered as the penetration of distributed generation increase
Reattività di catalizzatori zeolitici nella rimozione di NOx in condizioni magre
No full textLAUREA MAGISTRALENel presente lavoro di tesi sono stati studiati comportamento ed efficienza nell’abbattimento di emissioni di NOx dei seguenti catalizzatori ‘’Lean NOx Trap’’: Pt-Ba/SIBEA, Pt-Ba/HALBEA, Pt-Ba(25)/HALBEA, Pt/HALBEA e Pt-Ba/ZSM-5.Il sistema catalitico migliore tra quelli testati è sicuramente Pt-Ba/HALBEA, in quanto presenta una discreta efficienza in termini di NOx adsorbiti (soprattutto a 250°C e 50°C) e di N2 e NH3 prodotti in fase di riduzione. Si è deciso di proseguire la parte sperimentale analizzando le prestazioni in fase di adsorbimento di altri gruppi di catalizzatori a bassa temperatura: Pt-Ba/HALBEA, Pt/Al2O3 e Rh/Al2O3.In this thesis I have studied the behavior and efficiency of the following “Lean NOx Trap” catalysts in NOx emission reduction: Pt-Ba/SIBEA, Pt-Ba/HALBEA, Pt-Ba(25)/HALBEA, Pt/HALBEA e Pt-Ba/ZSM-5. The best system, between the tested ones, is Pt-Ba/HALBEA. It has a disrceet efficiency in NOx adsorbance and in N2 and NH3 production (during Rich phase). The tesis continues with the study of adsorbant phase at low temperature of other catalysts: Pt-Ba/HALBEA, Pt/Al2O3 and Rh/Al2O3
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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