A predator-prey system was studied that has a discrete delay, stage-structure, and Beddington-DeAngelis functional response, where predator species has three stages, immature, mature, and old age stages. By using of Mawhin's continuous theorem of coincidence degree theory, a sufficient condition is obtained for the existence of a positive periodic solution.

The ideas and techniques developed in [12,3] are extended to a basic stage structured model. Each strategy consists of two stages: a Juvenile (L for larvae), and Adult (A). A general model of this basic stage structure is formulated as a dynamical system on the state space of finite signed measures. Nonnegativity, well-posedness and uniform eventual boundedness are established under biologicall...

We present a new structure from motion (Sfm) technique based on point and vanishing point (VP) matches in images. First, all global camera rotations are computed from VP matches as well as relative rotation estimates obtained from pairwise image matches. A new multi-staged linear technique is then used to estimate all camera translations and 3D points simultaneously. The proposed method involve...

This experimental study demonstrates the efficiency of simple control strategies to damp a 3-stage tensegrity tower structure. The tower is mounted on a moving support which is excited with a limited bandwidth random signal (filtered white noise) by a shaker. Our goal is to minimize the transmissibility between base acceleration and top plate acceleration using piezoelectric displacement actuat...

Introduction Parasitic protozoa of the genus Leishmania are causative agents of the broad spectrum of human diseases termed the leishmaniases, which are prevalent in sub-tropical and tropical regions of the world 111. These unicellular organisms are members of the family Trypanosomatidae, a group which is characterized (at the molecular level) by a number of unusual mechanisms for gene regulati...

K e y w o r d s S t a g e structure, Competition, Global stability, Periodic solution. 1. I N T R O D U C T I O N The classical Lotka-Volterra type competitive system is an important population model and has been studied by many authors (see, for example, [1-9]). The two-species autonomous competitive system is of the form, ~ (t) = ~ (t) b~ ~ a~j~j (t) , i = 1, 2, (1.1) j = l where xi(t) denote...

In this paper, we consider a time-delayed periodic system which describes the competition among mature populations. By appealing to theories of monotone dynamical systems, periodic semiflows and uniform persistence, we analyze the evolutionary behavior of the system and establish sufficient conditions for competitive coexistence and exclusion.  2005 Elsevier Inc. All rights reserved.

This paper investigates the dynamical behavior of an assembled beam like structure with tip masses modeling a two stage space rocket structure. The beam like structure is composed of two beams connected together carrying two masses at the free ends to model the payload, and the stabilizing fins mass properties. The effect of non-homogeneity of the structure due to different cross section proper...