In this paper, we present a novel approach to estimate traffic speed using a sequence of images from an uncalibrated camera. We assert that exact calibration is not necessary to estimate speed. Instead, we use 1) geometric relationships inherently available in the image, 2) some common-sense assumptions that reduce the problem to a one-dimensional (1-D) geometry, 3) frame differencing to isolat...

In this proceeding, an impulsive control method for satellite formation flying is introduced. Secular drift caused by mean orbital speed difference is used to decrease impulse magnitude and the drift motion is represented by mean anomaly difference among six orbital elements. Orbital elements illustrate orbital motion and simulation results show the control history. In addition, to validate the...

Article history: Received 22 October 2010 Accepted 30 May 2011

Muons are produced in the upper atmosphere as a result of the collisions of incoming highenergy particles from outer space with atmospheric particles. These muons then travel through the atmosphere at high energies and are thus measured to exist for a much longer time than their mean lifetime at rest. This experiment measures both the mean lifetime of muons at rest as well as the mean speed thr...

The ability to integrate local second-order motion signals over space and time was examined using random-dot-kinematograms (RDKs) in which the dots were defined by spatial variation in the contrast, rather than luminance, of a random noise field. When either the speeds or the directions of the individual dots were selected at random from a range of possible values, globally the stimulus appeare...