1,721,448 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
Infinite-server bulk queue with mmpp arrivals
No full textWe consider a queueing system with batch MMPP arrivals and an unlimited number of servers. An arriving group of customers occupies necessary number of free servers for a random time determined by a given probability distribution function. At the end of the service, the whole group releases all the servers at the same time. In the paper, we obtain the probability distribution of the number of customers in the system. To solve the problem, we use the dynamic screening method and asymptotic analysis such condition of high intensity of arrivals. It is shown that under condition the probability distribution of the number of customers in the system is Gaussian. The parameters of this Gaussian distribution are obtained in the paper
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
Kinematics in Seyfert Galaxies for testing the activity interaction relation
No full textWhile it is largely demonstrated that interaction can trigger activity, it is not yet possible to estabilish whether there is a one-to-one relation between activity and interaction. Indeed the results of the statistical studies that show an excess of physical companions among Seyfert galaxies are still controversial. In this poster we present our project of a systematic investigation of the global kinematical properties of a sample of nearby (z < 0.03) isolated active and non active galaxies aimed at unveiling features caused by past interactions. We show preliminary results about two active galaxies of our sample, NGC 6300 and Mrk 1157
МОДЕЛИРОВАНИЕ ПРОЦЕССОВ ОБРАБОТКИ ДАННЫХ ФИЗИЧЕСКИХ ЭКСПЕРИМЕНТОВ В ВИДЕ НЕМАРКОВСКОЙ МНОГОРЕСУРСНОЙ СИСТЕМЫ МАССОВОГО ОБСЛУЖИВАНИЯ
No full textПредставлена математическая модель процесса обработки данных физических экспериментов, которая выполнена в виде немарковской бесконечнолинейной многоресурсной системы массового обслуживания с входящим MMPP-потоком и произвольным временем обслуживания. Доказано, что совместное стационарное распределение вероятностей суммарного объема занятого ресурса каждого типа сходится к многомерному гауссовскому распределению в асимптотическом условии растущей интенсивности входящего потока. Получены параметры этого асимптотического распределения
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
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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