1,721,114 research outputs found
On tail behaviour of stationary second-order Galton-Watson processes with immigration
Get PDFA second-order Galton-Watson process with immigration can be represented as a coordinate process of a 2-type Galton-Watson process with immigration. Sufficient conditions are derived on the offspring and immigration distributions of a second-order Galton-Watson process with immigration under which the corresponding 2-type Galton-Watson process with immigration has a unique stationary distribution such that its common marginals are regularly varying. In the course of the proof sufficient conditions are given under which the distribution of a second-order Galton-Watson process (without immigration) at any fixed time is regularly varying provided that the initial sizes of the population are independent and regularly varying
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
Kombinatorikus optimalizálás: Algoritmusok, Struktúrák, Alkalmazások = Combinatorial optimization: algorithms, structures, applications (a supplementary to the running OTKA-project with the same title no. T 037547)
No full textAz ELTE Operációkutatási tanszékén folyó kombinatorikus optimalizálási kutatások keretét több egymással párhuzamosan futó pályázat és egyéb kutatástámogatási szerződés határozza meg. Mindezek alapja egyrészt az MTA-ELTE Egerváry Jenő Kutatócsoport (EGRES), amelynek keretében három fiatal kutató foglalkoztatására van lehetőség, valamint az ELTE TTK matematika doktori iskolája: átlagban 5-6 ösztöndíjas doktorandusz hallgató dolgozik nálunk kombinatorikus optimalizálási területen. Az elméleti vizsgálatok gyakorlati kicsatolását támogatja a France Telecommal kötött kutatási szerződés, az ETIK (Egyetemközi Távközlési és Informatikai központ) és a Siemens. 2004 és 2007 között egy európai Marie Curie pályázat (ADONET) résztvevőiként jelentős támogatást kaptunk fiatal kutatóink külföldi látogatásainak elősegítésére és számos külfüldi kutató dolgozott nálunk hosszabb-rövidebb ideig. Működésünk alapvető támasza egy jövőre befejeződő kutatási OTKA pályázat. Ebbe a háttérbe illeszkedett az OTKA TS049788 kódszámú Tudományos Iskola pályázata, amely pótolhatatlan szerepet játszott a csoportunk eredményes működésében. Ifjú kutatóink munkáikat rangos konferenciákon mutathatták be és tekintélyes szaklapokban publikálták. Több, mint 30 olyan publikáció keletkezett, amely szorosan köthető az OTKA pályázathoz. Jelentős siker, hogy mind Pap, mind Szabó kutatási eredményeiért elnyerte a Bolyai Társulat Grünwald Géza emlékdíját, míg Pap Gyula megkapta az MTA Ifjúsági Díját is! | The frame of research in combinatorial optimization at the Operations Research Department of the ELTE University is determined by several projects and research funding contracts running parallel. The basis is the MTA-ELTE Egerváry Jenő Research Group (EGRES), that allows us to employ 3 young researchers. Moreover in the mathematics doctoral school of ELTE we have 5-6 PhD students working in combinatorial optimization on average. The practical applications of theoretical research is funded by a contract with France Telecom, by ETIK (Inter-University Cooperative Research Centre) and by Siemens. As the participants of an European Marie Curie network (ADONET) between 2004 and 2007 we received a significant contribution for our young researchers to visit colleagues abroad and we had many foreign researchers visiting us, too. The main support of our functioning is an OTKA project that will end next year. The current OTKA Scientific School project of code TS049788 fit this background and it played an important role in the successful functioning of our group. Our young researchers could present their work at highly ranked international conferences, and they published their results at prestigious journals. More than 30 publications were born directly in this project. It is an important success that both Pap and Szabó obtained the Grünwald Géza Prize from the Bolyai Mathematical Society, moreover Gyula Pap also obtained the Juvenile Prize of the Hungarian Academy of Sciences
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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