The classical concept of rigidity characterises conditions under which distance constraints between agents in R enforce a rigid structure on the whole collection of agents. The present paper has two goals. Firstly, we propose a generalised theory for rigidity to allow heterogeneous agent states on non-Euclidean spaces and general non-linear relative state constraints. To do this, we characteris...

Registration is a technique nowadays commonly used in medical imaging. A drawback of most of the current registration schemes is that all tissue is being considered as non-rigid. Therefore, rigid objects in an image, such as bony structures or surgical instruments, may be transformed non-rigidly. In this paper, we integrate the concept of local rigidity to the FLexible Image Registration Toolbo...

L-tyrosine, B6 and folic acid are involved in biosynthesis of DOPA and consequently dopamine. The aim of this study was to investigate the antiparkinsonian effect of these agents in perphenazine-induced catatonia in rats. Murprogo method or scored muscular rigidity, which is induced by a phenothiazine, was used to evaluate the antiparkinsonian effect of these agents. A significant decrease in m...

We present a novel construction of linear deformations for Lie algebras and use it to prove the non-rigidity several classes in different varieties. In particular, we address problem k-rigidity k-step nilpotent k-solvable algebras. show that with an abelian factor are not rigid, even case 1-dimensional factor. This holds more restricted k-rigidity. also free (k+1)-rigid, but however they k-rigid.

INTRODUCTION A previous study has employed shear-wave ultrasound elastographic imaging to assess corneal rigidity in an ex-vivo porcine eye model. This study employs the same modality in vivo in a rabbit eye model in order to assess lens, ciliary body and total ocular rigidity changes following the instillation of atropine and pilocarpine. METHODS Ten non-pigmented female rabbits were examine...

We prove global rigidity for compact hyperbolic and spherical cone-3-manifolds with cone-angles ≤ π (which are not Seifert fibered in the spherical case), furthermore for a class of hyperbolic cone-3-manifolds of finite volume with cone-angles ≤ π, possibly with boundary consisting of totally geodesic hyperbolic turnovers. To that end we first generalize the local rigidity result contained in [...

Rigid structure-from-motion (RSfM) and non-rigid structure-from-motion (NRSfM) have long been treated in the literature as separate (different) problems. Inspired by a previous work which solved directly for 3D scene structure by factoring the relative camera poses out, we revisit the principle of “maximizing rigidity” in structure-from-motion literature, and develop a unified theory which is a...