Hoor al-Azim wetland, are a large and permanent wetland area located between Iran and Iraq.  By entering the flow to the wetland area, the geometry of the wetland, acts in the form of an inverted imperfect pyramid. So that by entering the water flow, the water level of wetland is simultaneous by increasing the surface. In this study by using the geometric relationships of pyramids, was acted t...

Three years ago, a terrible de agration happened during the excavation of a subway gallery near Neaples. In this paper we describe the geometric modeling and the visual simulation of some possible settings of the catastrophic event. The geometric models and the visual simulation are currently being developed in PLaSM. Both animation and rendering are performed by an Open Inventor interface whic...

A novel unit cell structure with re-entrant hollow skeleton is designed and its Poisson's ratio has been studied using the finite element method (FEM) as a function of the geometric variables and the parent material Poisson's ratio. The simulation results showed that the Poisson's ratio of the unit cell structure is tunable over the full range of Poisson’s ratio (-1 to +0.5) by varying the geom...

In this paper, we present a framework to simulate biological cellular processes involving a strong topological and geometric structuration. Our framework is based on topology-based geometric modelling. The edge labels of a graph sub-class, the n-dimensional generalized maps, model the neighbouring relations between biological compartments. Thus, membranes become topological objects of the n-dim...

Since an M D queue is represented by a Markov chain we can consider the set of all the M D queues as a subset of Markov chains A geometric structures is induced from the geometric structure of the set of Markov chains which forms an exponential family In this paper we show that in the large deviation of the tail probability of the queue length of an M D the rate function and a twisted Markov ch...

This paper focuses on the stable and efficient simulation of articulated rigid body systems for real-time applications. Specifically, we focus on the use of geometric stiffness, which can dramatically increase simulation stability. We examine several numerical problems with the inclusion of geometric stiffness in the equations of motion, as proposed by previous work, and address these issues by...