The particle filtering, which is a probability technique, can be used for a robust tracking to noise and occlusion. It often uses characteristics based on the appearance information of a target object, such as color and edge, for calculating likelihood. As far as the appearance information is used, the particle filtering fails to track the target object when it intersects other objects which ha...

In this paper, we present an approach for tackling the problem of automatically detecting and tracking a varying number of people in complex scenes. We follow a robust and fast framework to handle unreliable detections from each camera by extensively making use of multi-camera systems to handle occlusions and ambiguities. Instead of using the detections of each frame directly for tracking, we a...

Most of the current ash transport and dispersion models neglect particle-fluid (two-way) and particle-fluid plus particle-particle (four-way) reciprocal interactions during particle fallout from volcanic plumes. These interactions, a function of particle concentration in the plume, could play an important role, explaining, for example, discrepancies between observed and modelled ash deposits. A...

Two optical techniques are experimentally investigated to measure the shock wave velocity and particle velocity in metals subjected to hyper velocity impacts. Fabry-Perot interferometer based optical system has been developed and used to measure the interface velocity profile of impacted Tantalum-Glass and Aluminum-Glass targets. Optical fibers coupled to fast photodiodes are implemented to mea...

We discuss the definition of particle velocity in doubly relativity theories. The general formula relating velocity and fourmomentum of particle is given. ∗supported by KBN grant 2 P03B 134 16

A statistical description of turbulence comprising a probability distribution for stationary flows is the basis determining nature turbulent velocity fluctuations. Away from Eulerian spatial increments field, Lagrangian notion temporal along particle trajectories appears to be hob statistics, ostensibly in presence inherent intermittencies observable tracking. Such were analyzed by using well-k...