1,721,003 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
The kinetics of electroreduction of peroxodisulfate anion on cadmium (0001) single crystal electrode
Get PDFVariations 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
Ultraheli-pihustuspürolüüsi meetodiga sadestatud elektrolüüdikihid kesktemperatuursele tahkeoksiidsele kütuseelemendile
Get PDFVäitekirja elektrooniline versioon ei sisalda publikatsioone.Jätkuvalt kasvava maailma energianõudluse tõttu on vajalik märkimisväärne üleminek efektiivsemale energiamuundamisele koos suuremahulise energia salvestamisega. Antud valdkonnas toimub hetkel paljude uute tehnoloogiate arendus. Tahkeoksiidse kütuseelemendi eeliseks on efektiivne elektri- ja soojusenergia tootmine erinevatest kütustest nagu metaan, prügila- ja sünteesgaas. Kuna mainitud seadme töötemperatuur on küllaltki kõrge (800-1000 ºC), on selle tehnoloogia täiemahuline kommertsialiseerimine viibinud lühikese eluea ja kõrge maksumuse tõttu.
Üheks strateegiaks tahkeoksiidse kütuseelemendi tasuvuse tõstmiseks on selle töötemperatuuri alandamine kesktemperatuursesse vahemikku (600-800 °C). Paraku ei ole klassikalise tsirkooniumoksiidil põhineva elektrolüüdi ioonjuhtivus alandatud temperatuuridel piisav. Lisaks on probleemne kõrge keemiline reaktiivsus tsirkooniumoksiidse elektrolüüdi ja mõningate haruldaste muldmetallide kobaltiidkatoodide vahel mõõdukatel temperatuuridel. Dopeeritud tseeriumoksiidset vahekihti on kasutatud mainitud komponentide vahel keemilise barjäärkihina, kuigi on esinenud teatud katioonide difusiooni. Tseeriumoksiidil ja baariumtseraadil põhinevat elektrolüüti on välja pakutud alternatiivina tsirkooniumoksiidile. Paraku ilmneb oksiidioonjuht tseeriumoksiidil soovimatu elektronjuhtivus redutseerivas keskkonnas ja prootonjuhtkeraamilistel baariumtseraatidel ilmnevad stabiilsusprobleemid CO2 keskkonnas.
Antud töös uuriti odava ultraheli-pihustuspürolüüsi meetodiga sadestatud kaitsekihtide omadusi mainitud probleemide valguses. Leiti, et terbiumkatioonid kaasdopandina väikeses kontsentratsioonis alandavad tseeriumoksiidi soovimatut elektronjuhtivust redutseerivates tingimustes. Optimaalselt kuumtöödeldud tseeriumoksiidne ja tsirkonaatne kaitsekiht toimisid tõhusalt vastavalt katioonide difusiooni alandamisel ning baariumtseraatse elektrolüüdi CO2 taluvuse tõstmisel.Continuously increasing world energy consumption requires a considerable shift in power generation towards more efficient energy conversion and large-scale energy storage methods. A variety of technologies are being developed at the moment. Solid oxide fuel cells have the advantage to generate electricity and heat with high efficiency from the fuels already available like methane, landfill gas and synthetic gas. As the operating temperatures of SOFC are quite high (800-1000 ºC), problems related to lifetime and material cost have inhibited their full-scale commercialization.
One strategy to make the solid oxide cells more economical is to lower their operating temperature to the intermediate range (600-800 ºC). However, ionic conductivity of the classical zirconia-based electrolyte is not sufficient at intermediate temperatures. Additionally, some cathode materials like rare-earth cobaltites have high reactivity with the zirconia electrolyte. Ceria interlayer applied between the zirconia electrolyte and rare-earth cobaltite cathodes has been proved to be an efficient chemical barrier layer, although cation mobility has been observed. Ceria- and barium cerate-based electrolytes have been proposed as the attractive alternative electrolyte materials for zirconia. However, ceria in reducing fuel atmosphere exhibits the undesirable electronic conductivity and perovskite barium cerates have the stability issues in CO2 environment.
In this work different protective layers were deposited using the low-cost ultrasonic spray pyrolysis method and their properties were analyzed in the light of the issues mentioned above. It was found that terbium as a co-dopant in low concentrations suppressed the electronic conductivity of ceria in reducing conditions. The ceria and barium zirconate protective layers with optimum thermal treatment were effective in suppressing the undesirable cation diffusion and enhancing the CO2 tolerance of barium cerate electrolyte, respectively
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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