Perceived Stability of Composite Material Objects

Perceived object stability depends on shape and material properties

Humans can detect whether an unstable object will fall or right itself, suggesting that the visual system can extract an object's center of mass (COM) and relate this to its base of support. While the COM can be approximated by its shape, this assumes uniform density. We created images of computer-generated goblets made of different materials to assess whether the visual system estimates an obj...

Measurement of Perceived Objects

We describe an experimental prototype system in which a virtual protractor is used to measure three dimensional relationships between objects. The objects being measured are not modeled explicitly using surface or procedural geometric definitions in the traditional sense, but rather are perceived by a viewer who looks at stereo image pairs. In contrast, the virtual instrument itself is represen...

Optimum composite material design

— The microstructure identification problem is treated : given certain phases in given volume fractions, how to mix them in aperiodic cell so that the effective material constants of the periodic composite lie the closest possible to certain prescribed values ? The problem is studied for the linear conduction équation. It is stated in terms of optimal con trol theory ; the admissible micro geom...

Objects capture perceived gaze direction.

The interpretation of another person's eye gaze is a key element of social cognition. Previous research has established that this ability develops early in life and is influenced by the person's head orientation, as well as local features of the person's eyes. Here we show that the presence of objects in the attended space also has an impact on gaze interpretation. Eleven normal adults identifi...

Composite Material and Optical Fibres