—Trap nets of varying design are commonly used to assess fish populations, but the effect of the design on gear selectivity is not well known. In particular, it may be advantageous to use multiple net designs with different mesh and throat sizes to maximize the catch of specific length-classes and to minimize the risk of predation on small fish by larger fish. We compared the species compositio...

Typical volume meshes in three dimensions are designed to conform to an underlying two-dimensional surface mesh, with volume mesh element size growing larger away from the surface. The surface mesh may be uniformly spaced or highly graded, and may have fine resolution due to extrinsic mesh size concerns. When we desire that such a volume mesh have good aspect ratio, we require that some space-f...

BACKGROUND Mesh repair of incisional hernia is superior to the conventional technique. From all available materials for open surgery polypropylene (PP) is the most widely used. Development resulted in meshes with larger pore size, decreased mesh surface and lower weight. The aim of this retrospective non randomized study was to compare the quality of life in the long term follow up (> 72 month)...

We present a method to adapt a tetrahedron mesh together with a surface mesh with respect to a size criterion. Both surface and tetrahedron mesh adaptation are carried out simultaneously and no CAD is required to adapt the surface mesh. The adaptation procedure consists in splitting or removing interior and surface edges in order to enforce a given size criterion. The enrichment process is base...

We study the sensitivity of algebraic eigenvalue problems associated with matrices arising from linearization and discretization of the steady-state Navier-Stokes equations. In particular, for several choices of preconditioners applied to the system of discrete equations, we derive upper bounds on perturbations of eigenvalues as functions of the viscosity and discretization mesh size. The bound...

Quality and size of mesh elements are important for optimizing the accuracy and convergence of mesh-based simulation processes. Often, a priori information, like internal material properties, of regions of interest is available, which can be used to locally specify the mesh element size for finding a good balance between the mesh resolution on the one hand and the runtime and memory performance...

This paper presents recent progress and extensions to TriQuaMesh (TQM) [1], targeted at providing good quality surface meshes: Increased robustness of the 1D mesh generator to handle highly non linear size variations; interior node generation driven by a size variation interpolation domain; improved mesh distortion reduction between the parameter space and the physical space. The concepts of Si...

Constant time algorithms for the transitive closure and some related graph problems on processor arrays with reconngurable bus systems. In this work we have shown a general construction so that a T steps rn-mesh of size n n can be simulated by a single step rn-mesh, where the corresponding mesh size increase by a factor of n O(T). The construction itself is simpler and smaller as compared to a ...

The multi-size-mesh multi-time-step DRP scheme (Tam&Kurbatskii2003) is suited for numerical simulations of multiple-scales aeroacoustics problems. In regions where there are high flow gradients (jet or flow near walls), small grid sizes to resolve small scales are needed. In regions where sound dominates, larger grid sizes for long sound wave lengths may be used to save computation resources. T...