Implant devices containing insulin-secreting ?-cells hold great promise for the treatment of diabetes. Using in vitro cell culture, long-term function and viability are enhanced when cultured with extracellular matrix (ECM) proteins. Here, our goal is to engineer a favorable environment within implant devices, where ECM proteins stably immobilized on polymer scaffolds, better support ?-cell adh...

A new algorithm for approximation of a given surface or scattered points by a surface of revolution is presented. It forms the basis for a study of approximation with profile surfaces. Those are sweeping surfaces traced out by a planar curve when its plane is rolling on a developable surface. Important special cases include developable surfaces and pipe surfaces, where the moving curve is a str...