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
Influence of the mandarin peel powder particle size on the filtration properties of a water-based mud : master's thesis
No full textIsplaka predstavlja jedan od ključnih elemenata bušaćih operacija te je vrlo bitno ispravno ju dizajnirati kako bi ispunjavala sve potrebne zadatke. Najčešće se koristi isplaka na bazi vode zbog smanjenog utjecaja na okoliš te dostupnosti vode kao baznog fluida za njenu pripremu. Mnogi aditivi koji se dodaju u isplaku kategoriziraju se kao štetni za okoliš te je stoga potrebno razviti nove vrste aditiva. Brojna istraživanja su provedena u tu svrhu koristeći biorazgradivi otpad kao potencijalne aditive. U ovom radu korišten je prah kore mandarine podijeljen u četiri frakcije raspona veličina čestica od 0,063 mm do 0,10 mm, od 0,05 mm do 0,063 mm, od 0,045 mm do 0,05 mm i od 0 mm do 0,045 mm. Također, prah se dodavao u četiri koncentracije: 0,5%, 1%, 1,5% i 2% na volumen vode. Dobiveni rezultati pokazali su da povećanjem koncentracije praha kore mandarine dolazi do smanjenja API filtracija i do 55% dok veličina čestica nije previše utjecala na rezultat. PPT filtracija se dodavanjem praha smanjivala do 39%. Na temelju rezultata može se zaključiti da prah kore mandarine može služiti kao aditiv za smanjenje filtracije na temperaturama do 140°C.The mud represents one of the key elements of drilling operations, and it is very important to design it correctly in order to fulfill all the necessary tasks. Water-based mud is most often used due to the reduced impact on the environment and the availability of water as based fluid. Many additives that are added to the mud are categorized as harmful to the environment and therefore it is necessary to develop new types of additives. Numerous studies have been conducted for this purpose using biodegradable waste as potential additives. In this work mandarin peel powder was used and divided into four fractions with particle sizes ranging from 0.063 mm to 0.10 mm, from 0.05 mm to 0.063 mm, from 0.045 mm to 0.05 mm and from 0 mm to 0.045 mm. The powder was also added in four concentrations: 0.5%, 1%, 1.5% and 2% by volume of water. The obtained results showed that, by increasing the concentration of mandarin peel powder, the API filtration was reduced by up to 55%, while the particle size did not affect the results too much. PPT filtration was reduced by up to 39% by adding powder. Based on the results, it can be concluded that the mandarin peel powder can be used as an additive to reduce filtration at temperatures up to 140°C
Influence of the mandarin peel powder particle size on the filtration properties of a water-based mud : master's thesis
No full textIsplaka predstavlja jedan od ključnih elemenata bušaćih operacija te je vrlo bitno ispravno ju dizajnirati kako bi ispunjavala sve potrebne zadatke. Najčešće se koristi isplaka na bazi vode zbog smanjenog utjecaja na okoliš te dostupnosti vode kao baznog fluida za njenu pripremu. Mnogi aditivi koji se dodaju u isplaku kategoriziraju se kao štetni za okoliš te je stoga potrebno razviti nove vrste aditiva. Brojna istraživanja su provedena u tu svrhu koristeći biorazgradivi otpad kao potencijalne aditive. U ovom radu korišten je prah kore mandarine podijeljen u četiri frakcije raspona veličina čestica od 0,063 mm do 0,10 mm, od 0,05 mm do 0,063 mm, od 0,045 mm do 0,05 mm i od 0 mm do 0,045 mm. Također, prah se dodavao u četiri koncentracije: 0,5%, 1%, 1,5% i 2% na volumen vode. Dobiveni rezultati pokazali su da povećanjem koncentracije praha kore mandarine dolazi do smanjenja API filtracija i do 55% dok veličina čestica nije previše utjecala na rezultat. PPT filtracija se dodavanjem praha smanjivala do 39%. Na temelju rezultata može se zaključiti da prah kore mandarine može služiti kao aditiv za smanjenje filtracije na temperaturama do 140°C.The mud represents one of the key elements of drilling operations, and it is very important to design it correctly in order to fulfill all the necessary tasks. Water-based mud is most often used due to the reduced impact on the environment and the availability of water as based fluid. Many additives that are added to the mud are categorized as harmful to the environment and therefore it is necessary to develop new types of additives. Numerous studies have been conducted for this purpose using biodegradable waste as potential additives. In this work mandarin peel powder was used and divided into four fractions with particle sizes ranging from 0.063 mm to 0.10 mm, from 0.05 mm to 0.063 mm, from 0.045 mm to 0.05 mm and from 0 mm to 0.045 mm. The powder was also added in four concentrations: 0.5%, 1%, 1.5% and 2% by volume of water. The obtained results showed that, by increasing the concentration of mandarin peel powder, the API filtration was reduced by up to 55%, while the particle size did not affect the results too much. PPT filtration was reduced by up to 39% by adding powder. Based on the results, it can be concluded that the mandarin peel powder can be used as an additive to reduce filtration at temperatures up to 140°C
Primjena Nodal analize na odabranoj proizvodnoj bušotini : završni rad
No full textOdređivanje radne točke (kapaciteta rada) proizvodne bušotine jedna je od bitnijih stavki kod ocjenjivanja efikasnosti crpljenja ležišta odnosno rentabilnosti rada bušotine. U ovom radu opisan je postupak određivanja proizvodnog kapaciteta na odabranoj bušotini pomoću tzv. NODAL™ analize. Objašnjen je sam koncept analize, kako se provodi, te utjecaj raznih proizvodnih parametara na rezultat. Također, prikazan je računski primjer primjene NODAL™ analize na jednoj plinskoj bušotini
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
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