We have developed a new halo finding method, Physically Self-Bound (PSB) group finding algorithm, which can efficiently identify halos located even at crowded regions. This method combines two physical criteria such as the tidal radius of a halo and the total energy of each particle to find member particles. No subtle dependence of halo mass functions on various parameters of the PSB method has...

A finite element mesh aggregating approach is presented to reconstruct images of multiple internal bioluminescence sources. Rather than assuming independence between mesh nodes, the proposed reconstruction strategy exploits spatial structure of nodes and aggregation feature of density distribution on the finite element mesh to adaptively determine the number of sources and to improve the qualit...

We investigate a purely combinatorial approach to the following mesh reenement problem: Given a coarse mesh of polygons in three-dimensional space, nd a decomposition into well-shaped quadrilaterals such that the resulting mesh is conforming and satisses prescribed local density constraints. We present a new approach based on network ow techniques. In particular, we show that this problem can e...

In computer simulations of bio-systems, charged soft matter, plasmas, and many more areas, advanced particle-mesh methods such as ParticleParticle Particle-Mesh (P3M) [1], Particle Mesh Ewald (PME) and Smooth Particle Mesh Ewald (SPME) [2], are commonly used to compute efficiently the long-range electrostatic interactions under periodic boundary conditions. These methods reduce the complexity o...

This work examines the effect of quantitative uncertainties modeling on the need for refined Finite Element (FE) meshes, as well as the influence of mesh density on the results obtained using FE models including uncertainties. According to the numerical investigation performed, the modeling of uncertainties has an effect on the accuracy of the FE solution sought and relaxes the need for increas...

Tree driven mesh is gaining popularity as a viable method to distribute clock with minimum skew in Deep Sub Micron (DSM) technology. In the design of the leaf level mesh, the density of the mesh at various parts of the chip is a crucial factor which decides the clock skew and power dissipated in the mesh. We propose a capacitance driven mesh formation methodology which forms a minimum wire leng...

PURPOSE To compare the inflammatory response of three different meshes on abdominal hernia repair in an experimental model of incisional hernia. METHODS Median fascial incision and skin synthesis was performed on 30 Wistar rats. After 21 days, abdominal hernia developed was corrected as follows: 1) No mesh; 2) Polypropylene mesh; and, 3) Ultrapro(r) mesh. After 21 days, the mesh and surroundi...

We propose a density approximation method based on Bernstein polynomials, consisting in superseding the classical Bernstein operator by a convenient number I∗ of iterates of a closely related operator. We mainly tackle two difficulties met in processing real data, sampled on some mesh XN . The first one consists in determining an optimal sub-mesh XK∗ , in order that the operator associated with...

A mesh generator for the production of high-quality finite-element meshes is being proposed. The mesh generator uses an artificial neural network, which grows during the training process in order to adapt itself to a prespecified probability distribution. The initial mesh is a constrained Delaunay triangulation of the domain to be triangulated. Two new algorithms to accelerate the location of t...

This work presents a new approach to conformal all-quadrilateral mesh adaptation. Most current quadrilateral adaptivity techniques rely on mesh refinement or a complete remesh of the domain. In contrast, we introduce a new method that incorporates both conformal refinement and coarsening strategies on an existing mesh of any density or configuration. Given a sizing function, this method modifie...