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We present a preliminary method to generate polyhedral meshes of general non-manifold domains. The method is based on computing the dual of a general tetrahedral mesh. The resulting mesh respects the topology of the domain to the same extent as the input mesh. If the input tetrahe-dral mesh is Delaunay and well-centered, the resulting mesh is a Voronoi mesh(More)
OBJECTIVE Faced with aging societies, there is an immense need to better understand the nature of volunteering outside advanced Western industrial countries. As a case of a rapidly aging society, we identify robust factors associated with elderly volunteering in Korea in terms of a resource framework. METHODS Data were derived from the Social Statistics(More)
1 Abstract We present a practical approach for solving volume and surface mesh optimization problems. Our approach is based on Newton's method which uses both first-order (gradient) and second-order (Hessian) derivatives of the non-linear objective function. The volume and surface optimization algorithms are modified such that surface constraints and mesh(More)
BACKGROUND Social epidemiology seeks in part to understand how social factors--ideas, beliefs, attitudes, actions, and social connections--influence health. However, national health datasets have not kept up with the evolving needs of this cutting-edge area in public health. Sociological datasets that do contain such information, in turn, provide limited(More)
In this paper, we study the effect the choice of mesh quality metric, pre-conditioner, and sparse linear solver have on the numerical solution of elliptic partial differential equations (PDEs). We smoothe meshes on several geometric domains using various quality metrics and solve the associated elliptic PDEs using the finite element method. The resulting(More)
Our understanding on a silicon chip is limited due to low measurement resolution or model-silicon miscorrelation including variations. This paper shows that chips are better understood by combining noisy measurement results and model information through a mathematical algorithm. Our proposed method learns segment delays in logic circuits from quantized path(More)
We propose a hybrid mesh deformation algorithm which uses the direction of the boundary deformation to determine the positions of the interior mesh vertices in the deformed mesh. Our goal is to produce meshes on deformed domains which maintain mesh 'similar' element shape and possess no inverted elements. The hybrid mesh deformation algorithm consists of(More)