1,720,962 research outputs found
The Psychology of Graphic Images,
No full textParole chiave e frasi:
visual perception, technical drawing, anamorphosis, distal stimulus, projective geometry, concave polygon, Descartes, Feynman diagrams, Hugo Pratt, visual system, hypothetigraphy, taxonomic, affine transformations, figure-ground, rectangle, M. C. Escher, concave angles, 18th century, Scott McCloud, ideography
Indice
Introduction
1
technical drawing, ideography, projective geometry
Invariance and Transformation
25
anamorphosis, affine transformations, cross ratio
The Elusive Context
48
Heinrich Kley, Max Ernst, Magritte
The Quest for Balance
65
anamorphosis, Piranesi, Saul Steinberg
What Makes a Graphic Image Work
97
optical axis, Weber carburetor, Saul Steinberg
Visualizing the Invisible
141
Feynman diagrams, Descartes, hypothetigraphy
altre »
Seeing and Showing Time
178
Hugo Pratt, red square, BACTERIUM
Graphics and Perception
215
concave polygon, concave angles, convex angles
Ambiguity and Information
243
distal stimulus, M. C. Escher, figure-ground
Toward a Taxonomy of Drawings
267
taxonomy, three Graces, ical
Notes
289
Gool, Nougier, Pauwels
References
297
Author Index
305
Subject Index
309
taxonomic drawing, images in sequence, distance between image
A new optical geometrical illusion
No full textThe aim of the present work was to describe and attempt to explain a new and unusual geometrical optical illusion with three levels of distortion. The illusive figure was made up of three juxtaposed bands of the same width, which, when appropriately juxtaposed, appeared to be of different widths. We hypothesised that the effect would depend on the combined action of some factors: 1) the band shape and their reciprocal spatial position. 2) The degree of coincidence of the sides of the juxtaposed bands. 3) The perceptual system’s inability to account for all the projective transformation. To test these hypotheses, an experiment was conducted in which the shape of three stimuli was manipulated through affine transformation as well as variation of side lengths. The participants' task was to evaluate the width of the bands. The results revealed a robust and stable illusive effect and the factors that most seem to influence the illusion were band shape and conjoining side lengths
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
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