1,720,965 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
Hipoteza efektywności rynku; weryfikacja dla indeksu WIG- Spożywczy
Get PDFThe aim of this research is to verify the hypothesis of the weak form efficiency of capital market. The research is conducted for the WIG-Spożywczy index. In the paper, Wald-Wolfowitz’s test, Quenouille’s test of autocorrelation coefficients, the test of joint autocorrelation with Ljung- Box’s statistic and the test of calendar-related anomaly are used. The analysis is provided for 11 sub- samples that contain the daily logarithmic rates of return from 31th December 1998 till 5th May 2011. / Synopsis. W pracy poddano weryfikacji hipotezę o słabej efektywności informacyjnej rynku finansowego. Badania przeprowadzono dla indeksu WIG-Spożywczy. Wykorzystano w tym celu test Walda-Wolfowitza, test współczynnika autokorelacji Quenouille’a, łączną statystykę Ljunga-Boxa oraz testy efektów stycznia oraz poniedziałku. Analizę przeprowadzono w oparciu o dzienne logarytmiczne stopy zwrotu dla okresu od 31.12.1998 do 05.05.2011 dla wyznaczonych 11 podprób
Sources of real exchange rates fluctuations EUR/ PLN
No full textW artykule poruszono problem wyjaśnienia źródła fluktuacji realnego efektywnego kursu walutowego na przykładzie EUR/ PLN wykorzystując podejście równowagi. Punktem wyjścia było opracowanie modelu wektorowej autoregresji oraz jego strukturalnej postaci. Specyfikacji modelu dokonano w oparciu o pracę Claridy i Galiego [1994], wykorzystując kwartalny szereg czasowy 1996- 2010 dla Polski i strefy euro. Pozwoliło to na estymację sytemu składającego się z trzech zmiennych: PKB, REER oraz HICP. Celem określenia źródła fluktuacji realnego kursu EUR/ PLN przeprowadzono dekompozycję wariancji błędu prognozy. Okazało się, że największe znaczenie (powyżej 80%) w wyjaśnieniu wariancji REER mają szoki popytowe.In the article we've raised the issue of explaining the source of the fluctuation of the Real Effective Exchange Rate (REER) using a equilibrium approach for EUR/PLN example. The starting point was to elaborate a model of vector autoregression and its structural form. The specification of a model have been made based on Clarida and Gali's work. To determine the source of the fluctuation of the real exchange rate we used Forecast Error Variance Decomposition. It resulted that the most important (more than 80%) in explaining the variance of the REER are demand shocks
Estimation of the yield curve of interest rates in Poland
No full textW artykule podjęty został problem estymacji krzywej dochodowości dla Polski. Przedstawiono w nim dwie metody najczęściej stosowane przez banki centralne, które publikują takiego typu dane- metodę Nelsona- Siegela oraz Svenssona. Rozważono również możliwość stosowania tych metod w polskich warunkach a w dalszej konsekwencji przedstawiono wyniki estymacji struktury terminowej stóp procentowych. Porównano również oszacowania długookresowej oraz krótkookresowej stopy procentowej obiema metodami w latach 2001- 2012 w Polsce.Tha aim of this article is the estimation of the yield curve of interest rates in Poland. Two methods applied at central banks publishing this type of data have been presented- Nelson-Siegel method and Svensson method. The article reports the results of applying these methods for Poland subsequently
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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