a r t i c l e i n f o a b s t r a c t We present simulations of the implosion of a dense shell in two-dimensional (2D) spherical and cylindrical geometry performed with four different compressible, Eulerian codes: RAGE, FLASH, CASTRO, and PPM. We follow the growth of instabilities on the inner face of the dense shell. Three codes employed Cartesian grid geometry, and one (FLASH) employed polar ...

With increasing life expectancy, the demand for preservation of native articular cartilage is increasing to delay joint arthroplasties. In the knee, there are many different strategies to preserve the articular cartilage including but not limited to corrective osteotomies, chondral injury restoration, intraarticular injection of cells or growth factors(PRP). However, One of the most important s...

OBJECTIVES Preservation of both anterior and posterior cruciate ligaments in total knee arthroplasty (TKA) can lead to near-normal post-operative joint mechanics and improved knee function. We hypothesised that a patient-specific bicruciate-retaining prosthesis preserves near-normal kinematics better than standard off-the-shelf posterior cruciate-retaining and bicruciate-retaining prostheses in...

background: socket preservation after tooth extraction is one of the indications of bone grafting to enhance preorthodontic condition. the aim of this study is to determine the effects of socket preservation on the immediate tooth movement, alveolar ridge height preservation and orthodontic root resorption. materials and methods: in a split-mouth technique, twelve sites in three dogs were inves...

Abstract. This work is focused on the issue of symmetry preservation, energy and volume conservation and other important properties of staggered Lagrangian hydrodynamic schemes in cylindrical geometry. Typical advantages and drawbacks of existing areaweighted (AW) and genuinely r-z schemes will be pointed out. With quadrilateral cells it is known that, in r-z, spherical symmetry preservation, p...

We present an unsupervised algorithm for registering 3D surface scans of an object undergoing significant deformations. Our algorithm does not use markers, nor does it assume prior knowledge about object shape, the dynamics of its deformation, or scan alignment. The algorithm registers two meshes by optimizing a joint probabilistic model over all point-topoint correspondences between them. This...

This paper describes an approach to smooth the surface and improve the quality of quadrilateral/hexahedral meshes with feature preserved using geometric flow. For quadrilateral surface meshes, the surface diffusion flow is selected to remove noise by relocating vertices in the normal direction, and the aspect ratio is improved with feature preserved by adjusting vertex positions in the tangent ...

For the purpose of cultural heritage preservation, the task of reconstructing eroded and visually complicated architectural geometrical patterns is facing many practical challenges. Existing recording techniques have many limitations when dealing with patterns that are deteriorated or visually unclear. Unfortunately, until today, the task of reconstructing these patterns is still performed manu...

Packaging was recently identified as an essential element in addressing the key challenge of sustainable food supply and is gaining interest among researchers. It a central quality preservation due to its role heat mass exchange with external atmosphere, contributing during storage extending shelf life. This work proposes three new packaging configurations same size but different geometry venti...