Recent developments in dynamic contour tracking in video sequences are based on prediction using dynamical models. The parameters of these models are fixed by learning the dynamics from a training set to represent plausible motions, such as constant velocity or critically damped oscillations. Thus, a problem arise in cases of non-constant velocity and unknown interframe motion, i.e. unlearned m...

Tracking objects over the video frames finds many applications in surveillance [13], human activity analysis [4] and gesture recognition [6],[12]. It becomes a very challenging task if the appearence and the dynamics of the object varies over successive frames. It becomes important to include elements of nonlinearity and non-Gaussianity in order to model accurately the underlying dynamics of a ...

In this article, we demonstrate a hybrid tracking method for scaled and orientated objects in video. Histogram-based mean shift can track objects quickly. However, it does not utilize shape or dynamics information and typically employs a convex bounding box, such as a rectangle or an ellipse that is decoupled from object scale and orientation. Active shape models and particle filters cope with ...

The increased interest in transdermal drug delivery has highlighted the importance of understanding fluid-particles dynamics in porous media. In this work, the fluid-mediated transport of drug particles in the Corneocytes of Stratum Corneum is investigated by means of the Lattice Boltzmann method, as coupled to a particle dynamics solver to track the trajectory of the drug particles. The numeri...

This work sought to design control laws for a quadrotor helicopter to track a desired path. The control laws were developed on a model of the quadrotor dynamics, which was obtained by linearizing its nonlinear equations of motion. After, the effectiveness of the control laws were studied by including modeling uncertainties and disturbances such as wind. The results enabled us to understand whet...

We present two proofs of the fact, originally due to Reiner Martin, that any fully irreducible hyperbolic element of Out(FN ) acts on the projectivized space of geodesic currents PCurr(FN ) with uniform north-south dynamics. The first proof, using purely train-track methods, provides an elaborated and corrected version of Reiner Martin’s original approach. The second proof uses the geometric in...

This article shows the results obtained during implementation of a portable diagnosis system to maintenance routines passenger vehicles and permanent track Metro train, which made it possible evaluate such aspects as: safety, comfort technical condition track-vehicle interphase. The reports given in this evaluation allowed identification arrangement sections according its condition, relating th...

We report on unexpected dramatic radial variations in ion tracks formed by irradiation with energetic ions (2.3 GeV (208)Pb) at a constant electronic energy-loss (~42 keV/nm) in pyrochlore-structured Gd2TiZrO7. Though previous studies have shown track formation and average track diameter measurements in the Gd2TixZr(1-x)O7 system, the present work clearly reveals the importance of the recrystal...

• Beam on elastic foundation theory is reviewed for railway engineering applications. Limitations of continuously supported models are explored. Multi-layer and discretely improve track dynamic response. Computationally efficient periodic semi-periodic solutions reviewed. Considerations given coupling tracks with vehicle subgrade models. widely employed when studying behaviour, applications suc...

investigations on vibration behaviors of railway track systems were attempted in this research. this was made by conducting a comprehensive field investigation into the free vibration of track systems and response of tracks to train moving loads. in-situ modal analysis was used in a railway track field as an efficient method of investigating dynamic properties of railway track systems. natural ...