25,367 research outputs found
GPU-based Streaming for Parallel Level of Detail on Massive Model Rendering
Rendering massive 3D models in real-time has long been recognized as a very challenging problem because of the limited computational power and memory space available in a workstation. Most existing rendering techniques, especially level of detail (LOD) processing, have suffered from their sequential execution natures, and does not scale well with the size of the models. We present a GPU-based progressive mesh simplification approach which enables the interactive rendering of large 3D models with hundreds of millions of triangles. Our work contributes to the massive rendering research in two ways. First, we develop a novel data structure to represent the progressive LOD mesh, and design a parallel mesh simplification algorithm towards GPU architecture. Second, we propose a GPU-based streaming approach which adopt a frame-to-frame coherence scheme in order to minimize the high communication cost between CPU and GPU. Our results show that the parallel mesh simplification algorithm and GPU-based streaming approach significantly improve the overall rendering performance
On Volume Growth of Gradient Steady Ricci Solitons
In this paper we study volume growth of gradient steady Ricci solitons. We
show that if the potential function satisfies a uniform condition, then the
soliton has at most Euclidean volume growth.Comment: 8 page
Thermodynamic Magnon Recoil for Domain Wall Motion
We predict a thermodynamic magnon recoil effect for domain wall motions in
the presence of temperature gradients. All current thermodynamic theories
assert that a magnetic domain wall must move toward the hotter side, based on
equilibrium thermodynamic arguments. Microscopic calculations on the other hand
show that a domain wall can move either along or against the direction of heat
currents, depending on how strong the heat currents are reflected by the domain
wall. We have resolved the inconsistency between these two approaches by
augmenting the theory in the presence of thermal gradients by incorporating in
the free energy of domain walls by a heat current term present in
nonequilibrium steady states. The condition to observe a domain wall
propagation toward the colder regime is derived analytically and can be tested
by future experiments.Comment: Submitted with revision
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