1,722,784 research outputs found
Sierpinski gasket as a Martin boundary I: Martin kernels - Dedicated to Professor Masatoshi Fukushima on the occasion of his 60th birthday
No full textWe show that a Sierpinski gasket in N dimension is homeomorphic to the minimal Martin boundary of some canonical Markov chain. This provides a new class of examples for the boundary theory of Markov chains and the basis for a harmonic analysis on p.c.f. fractal structures
An integrated study to recent tectonics in Central Japan: seismological, geodetic, morphotectonic and structural data compared
No full textThe abundance of seismological, geodetic, morphotectonic and structural data for Central Japan allows an integrated approach to the study of recent tectonics. This study has been conducted in a region where an apparent uniformity of geodynamic conditions existed during Quaternary times. Four independent data sets have been collected: minor and major earthquakes, mesoscale faults, and large scale morphological dislocations. All of them have been reduced to a common format including fault plane orientation, direction and sense of movement. The analysis has been carried out by applying different methodologies commonly employed in structural geology in order to obtain both qualitative and quantitative estimates of the stress field, where the latter kind of analyses also provides the principal stress directions and the ratio R = (sigma1-sigma2)/(sigma1-sigma3). The results of each data set are internally consistent. But above all, the similarity between the three principal stress directions of the four data sets is straightforward, showing a clear strike-slip regime with an ESE-WNW trending sigma1 and a NNE-SSW trending sigma3 whose averages are 288°/05° and 198°/10° respectively. Numerous geodetic data from the region show exactly the same direction of minimum horizontal strain (i.e. maximum contraction) and broadly confirm previous large scale stress trajectories maps. By considering characteristic depth, age, fault dimension etc. for each fault set, it is possible to understand better the recent (Late Quaternary-Present) tectonic evolution of the area where a progressive NNE-SSW restraining appears to occur. Due to the possible westward migration of the compressional zone associated with the Itoigawa-Shizuoka Tectonic Line, or the southern increasing constrain produced by the Philippine Sea Plate, this geodynamic process will eventually produce a permanent swap of the sigma2 and sigma3 axes
Reflections on harmonic analysis of the Sierpinski gasket
No full textBased on the geometric structure of the Sierpinski gasket, KIGAMI [10], [11] established the harmonic analysis for the gasket analytically. On the other hand DENKER and SATO [3] proved that the Sierpinski gasket S in R-N has a natural description as the Martin boundary for some canonical Markov chain on the word space. The aim of this paper is to reveal the connection between the harmonic analysis of the Markov chain and that of the Sierpinski gasket viewed as a Martin boundary, and to describe this analysis in terms of the Markov operator, the Martin kernel and the structure of the word space
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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