This paper presents a new compression algorithm for 3D dynamic mesh sequences based on the local principal component analysis (LPCA). The algorithm clusters the vertices into a number of clusters using the local similarity between the trajectories in a coordinate system that is defined in each cluster, and thus transforms the original vertex coordinates into the local coordinate frame of their ...

Most new network builds and major upgrades in recent years have been focused on building dynamic reconfigurable optical layers to support the explosive growth in IP traffic. These advanced optical layers include Reconfigurable Optical Add Drop Multiplexer (ROADM) devices allowing network operators to dynamically configure the wavelengths to be added and dropped at each network node, thus increa...

We present an efficient and effective preconditioning method for time-dependent simulations with dynamic, adaptive mesh refinement and implicit time integration. Adaptive mesh refinement greatly improves the efficiency of simulations where the solution develops steep gradients in small regions of the computational domain that change over time. Unfortunately, adaptive mesh refinement also introd...

The mapping of computations to parallel machines can be realized at the various data structures associated with the computations. In the case of PDE (Partial Differential Equations) based applications, we decided to fonnulate this problem at the discrete data structures of the underlying computation [Chri 91]. In this paper, we fonnulate and implement parallel mapping algorithms on distributed ...

Computational fluid dynamics (CFD) flow simulations are extremely expensive in terms of CPU time and memory. In this study, parallel computing and grid adaptation techniques are employed to achieve high efficiency and accuracy in a hybrid unstructured flow solver. However, adaptive local grid refinement/coarsening causes the unequal distribution of workload among the processors at run time. A s...

Yang Chen and Gérard Medioni We address the problem of constructing a complete surface model of an object using a set of registered range images. The construction of the surface description is carried out on the set of registered range images. Our approach is based on a dynamic balloon model represented by a triangulated mesh. The vertices in the mesh are linked to their neighboring vertices th...

The mesh is a popular multi-computer topology due to its simplicity and need for few connections, regardless of the size of the system. However, one-to-all (broadcasting) or point-to-point communication between two nodes far away result in a long delay. In this paper, we propose a mesh with a global bus as a multi-computer topology. This structure enhances the communication capability of the me...