BACKGROUND The prevalence of Brugada ECG pattern (BrEP) is different in different regions, and its mean prevalence over the world is unknown. The risk of people with BrEP for death remains unknown. We performed a meta-analysis to determine the prevalence of BrEP and risk ratio (RR) for death. METHODS Relevant studies published between July 1, 2000 and August 20, 2016, which contain prevalence...

Binary Space Partitioning Trees (BSP-Trees) have been proposed as an alternative way to represent polytopes based on the spatial subdivision paradigm. Algorithms that convert from Boundary Representation (BRep) to BSP-Trees have been proposed, but none is known to perform the opposite conversion. In this paper we present such an algorithm, that takes as input a BSP-Tree representation for a pol...

Collision detection is the foundation of interaction in virtual reality. In Virtual design workspace, virtual assembly workspace, and virtual training, for example, the motion of virtual objects must be constrained by collisions with other objects to provide the sense of reality. Important human-object interactions such as grasping, hitting, moving, etc., in virtual reality (VR) environments ar...

In this paper we introduce the brep-index, a new multi-dimensional space partitioning data structure that provides quick access to the vertices, edges and faces of a boundary representation (brep), thus yielding a single unified representation for polyhedral solids. We d~cribe the cortStruction of the brep-index and show that its size is O(v +e + f), where VI €I and J are the number of vertices...

This paper proposes a robust algorithmic and computational framework to address the problem of modeling the volume obtained by sweeping a solid along a trajectory of rigid motions. The boundary representation (simply brep) of the input solid naturally induces a brep of the swept volume. We show that it is locally similar to the input brep and this serves as the basis of the framework. All the s...

Binary Space Partitioning Trees (BSP-Trees) have been proposed as an alternative way to represent polytopes based on the spatial subdivision paradigm. Algorithms that convert from Boundary Representation (BRep) to BSP-Trees have been proposed, but none is known to perform the opposite conversion. In this paper we present such an algorithm , that takes as input a BSP-Tree representation for a po...

Many computational science tools employ finite element meshes as discretizations of the geometrical domains, and automatic mesh generation has become an indispensable part of the discretization process. Boundary representations (BRep) of solids are the means of describing the geometrical model to the mesher, thus enabling the generator to proceed without user intervention. Significant effort ha...

This paper presents a novel method to tie geometric boundary representation (BREP) to voxel-based collision detection for use in haptic manual assembly simulation. Virtual Reality, in particular haptics, has been applied with promising results to improve preliminary product design, assembly prototyping and maintenance operations. However, current methodologies do not provide support for low cle...