1,721,881 research outputs found
Bivariate coefficients of agreement among any number of observers
No full textThe paper describes new methods for the analysis of the agreement between any number of observers of a given phenomenon. Several indexes popular for agreement analysis are considered as special cases of the suggested approach
The Italian Tax System: International and EU Obligations and the Realization of Fiscal Federalism
No full textOn optimizing bus dwell times to reduce the probability of stopping for a red light at intersections
No full textThis paper provides an analytical approach for the problem of reducing the time spent by buses at signalized intersections, waiting for green phase, by suitably increasing the dwell time at bus stops. It is well known that the main motivation to tackle with this problem lies on the expected advantages in terms of reduction in the number of stops, in the fuel consumption, in an increase of the comfort and in the number of passengers able to board the bus. In this framework, the availability of an analytical model makes the search of a solution and the analysis of the relevant properties direct and faster with respect to simulation approaches. The problem is modeled as a non-linear stochastic optimization problem aimed at determining the best departure time from the bus stop in order to make the bus arrive at the signalized intersection during the green phase. The uncertainties related to travel time and passengers' boarding are specifically modeled and their influence on the solutions is discussed. A detailed discussion of the resulting performances is provided via a simulated case study
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
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