Characterizing Profiled Fibers by Multiscale Shape Representations

2012 ◽  
Vol 40 (3) ◽  
pp. 104253 ◽  
Author(s):  
RongWu Wang ◽  
LiPing Tang ◽  
PeiFeng Zeng ◽  
BuGao Xu
Keyword(s):  
Shape Representations ◽  
Profiled Fibers

Cities and News

2021 ◽  
Author(s):  
Lila Caimari
Keyword(s):  
Case Studies ◽  
New World ◽  
Turn Of The Century ◽  
South American ◽  
International News ◽  
Port Cities ◽  
Shape Representations ◽  
The World ◽  
Current Events ◽  
Late Nineteenth

This Element examines urban imaginaries during the expansion of international news between the late nineteenth and the early twentieth centuries, when everyday information about faraway places found its way into newspapers all over the world. Building on the premise that news carried an unprecedented power to shape representations of the world, it follows this development as it made its way to regular readers beyond the dominant information poles, in the great port-cities of the South American Atlantic. Based on five case studies of typical turn-of-the-century foreign news, Lila Caimari shows how current events opened windows onto distant cities, feeding a new world horizon that was at once wider and eminently urban.

scholarly journals An analysis of the intersections between race and class in representations of Black and white gay men in QueerLife

Image & Text ◽  
2021 ◽  
Author(s):  
Kudzaiishe Peter Vanyoro
Keyword(s):  
South African ◽  
Gay Men ◽  
Gay Identity ◽  
Structural Racism ◽  
Shape Representations ◽  
Race And Class ◽  
Black And White ◽  
White Middle Class ◽  
Black Bodies ◽  
Gay Identities

ABSTRACT This article seeks to critically analyse how intersections of race and class shape representations of Black and white gay men in QueerLife, a South African online magazine. It focuses on QueerLife's '4men' section and how its content represents classed and raced gay identities. My argument is that QueerLife forwards racialised and classed representations of the gay lifestyle, which reinforce homonormalisation within what is known as the "Pink Economy". Using Critical Diversity Literacy (CDL) to read the underlying meanings in texts and images, the article concludes that QueerLife is complicit in the construction of gay identity categories that seek to appeal to urban, white, middle-class gay-identifying communities in South Africa. The article also demonstrates how, when Black bodies are represented in QueerLife, exceptionalism mediates their visibility in this online magazine. Overall, the findings demonstrate how Black and white gay bodies are mediated online and how their different racial visibilities are negotiated within the system of structural racism. Keywords: Class, gayness, Pink Economy, QueerLife, representation, racism.

The Role of Constant Curvature in 2-D Contour Shape Representations

Perception ◽  
10.1068/p6970 ◽  
2011 ◽  
Vol 40 (11) ◽  
pp. 1290-1308 ◽  
Author(s):  
Patrick Garrigan ◽  
Philip J Kellman
Keyword(s):  
Retention Interval ◽  
Constant Curvature ◽  
Visual Information ◽  
Recognition Performance ◽  
Shape Representations ◽  
Contour Shape ◽  
Position And Orientation ◽  
Retention Intervals ◽  
Invariant Shape

In early cortex, visual information is encoded by retinotopic orientation-selective units. Higher-level representations of abstract properties, such as shape, require encodings that are invariant to changes in size, position, and orientation. Within the domain of open, 2-D contours, we consider how an economical representation that supports viewpoint-invariant shape comparisons can be derived from early encodings. We explore the idea that 2-D contour shapes are encoded as joined segments of constant curvature. We report three experiments in which participants compared sequentially presented 2-D contour shapes comprised of constant curvature (CC) or non-constant curvature (NCC) segments. We show that, when shapes are compared across viewpoint or for a retention interval of 1000 ms, performance is better for CC shapes. Similar recognition performance is observed for both shape types, however, if they are compared at the same viewpoint and the retention interval is reduced to 500 ms. These findings are consistent with a symbolic encoding of 2-D contour shapes into CC parts when the retention intervals over which shapes must be stored exceed the duration of initial, transient, visual representations.

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