In this paper we consider the problem of recovering the 3D motion and shape of an arbitrarily-moving, arbitrarilyshaped curve from multiple synchronized video streams acquired from distinct and known points in space. By studying the 3D motion and shape constraints provided by the input video streams, we show that (1) shape and motion recovery is equivalent to the problem of recovering the diffe...

Microwave technology is a highly effective approach to fast and uniform heating. This article investigates that the microwave heating as a novel method is used to rapidly foam and actuate biocompatible and biodegradable shape memory crosslinked-polycaprolactone (c-PCL) foams. The optical microscope proves that the resulting c-PCL foams have homogenous pore structure. Mechanical behavior and sha...

High cycle-life is important for shape memory materials exposed to numerous cycles, and here we report shape memory polyimide that maintained both high shape fixity (Rf) and shape recovery (Rr) during the more than 1000 bending cycles tested. Its critical stress is 2.78 MPa at 250 °C, and the shape recovery process can produce stored energy of 0.218 J g(-1) at the efficiency of 31.3%. Its high ...

This paper presents a new approach to 3D shape representation { approximating the shapes of object parts by a set of prescribed volumetric models using single-and multi-view range data. We deene a new set of volumetric part models , called parametric geons. These are seven qualitative shapes, each of which is formulated by a restricted globally-deformed superellipsoid. Model recovery is perform...

detected in each slice by means of surface fitting or interpolation methods [7–15]. Surface fitting approaches can also In this paper we propose a strategy to solve the problem of recovering the 3-D shape of anatomical structures from single be used for the recovery of the approximate shape of an X-ray images, i.e., the problem of Shape from Radiological anatomical structure from a small set of...

Shape memory alloys (SMAs) can produce large strains when deformed (e.g., up to 8%). Heating results in a phase transformation and associated recovery of all the accumdated strain. This strain recovery can occur against large forces, resulting in their use as actuators. Thus an SMA element can integrate both sensory and actuation fitnctions, by inhercEtly s e x k g a c h m ~ c ia temperature an...

We introduce a framework for recovering the 3D shape and motion of unknown, arbitrarily-moving curves from two or more image sequences acquired simultaneously from distinct points in space. We use this framework to (1) identify ambiguities in the multi-view recovery of (rigid or nonrigid) 3D motion for arbitrary curves, and (2) identify a novel spatio-temporal constraint that couples the proble...