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Optimal paths for the Reeds-Shepp car with monotone spatial control and vessel tracking in medical image analysis
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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
The explicit solutions of linear left-invariant 2nd-order evolution equations on the 2D-Euclidean motion group
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Schaalpartituren : onderzoek: partituren in de beeldanalyse I [Herplaatsing]
No full textIn beeldanalyse spelen schaal en lokale oriëntatie een prominente
rol. Waar bevat het beeld belangrijke informatie en op welke schaling
gebeurt dit? Een gestructureerde samenvatting van deze data
noemen we een partituur van de afbeelding. Deze partituur bevat
de multischaal- en multioriëntatieinformatie op een zo uitgesproken
mogelijke manier. Remco Duits, onderzoeker op het gebied van de
beeldanalyse en -interpretatie, beschrijft in dit overzichtsartikel de
vele wiskundige mogelijkheden om zo’n structuur op een afbeelding
aan te brengen. In dit eerste deel beperkt hij zich tot schaalpartituren
van een beeld en bijbehorende evolutievergelijkingen. Deze
schaalpartituren zijn natuurlijk niet erg homogeen; ze bevatten in
het bijzonder singuliere punten waarvan topologische eigenschappen
veranderen naarmate de schaal van observatie toeneemt. Vrijwel
het gehele originele beeld kan weer worden verkregen uit deze
singulariteiten. Kennis van deze singulariteiten is belangrijk voor
beeld–manipulatie, compressie en objectherkenning
Perceptual organization in image analysis : a mathematical approach based on scale, orientation and curvature
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