Objectives: To evaluate the effects of abutment material and connection type on implant-abutment rigidity. Methods: The study evaluated eighteen implants with three different types connections: external-hexagon, tri-channel, conical connection. Half were connected to titanium abutments, other half zirconia forming six groups (n=3). submitted 1,200,000 load cycles a force amplitude 90 N. During ...

Purpose In order to improve the robustness of bare-steel and composite structures in fire, a novel axially rotationally ductile connection has been proposed this paper. Design/methodology/approach The component-based models have incorporated into software Vulcan facilitate global frame analysis for performance-based structural fire engineering design. These are validated against detailed Abaqus...

In this paper we show how translation from QVT-R to an intermediate semantic representation can be used to support analysis of QVT-R specifications. We use the UML to RDB case study to illustrate the approach.

Rib shear connectors are gaining increasingly attention in the field of composite constructions. Especially bridge constructions, rib offer many advantages compared to conventional such as headed studs. In order describe load-bearing behaviour under cyclic loading, successively increasing slip resulting from loading must be taken into account. The latter leads growth relative displacements alon...

This article aims to quantify the impact of a potential failure passive fire protection on ultimate response top and seat steel connection with double web angles. A numerical, finite element analysis scheme is proposed considering real, semi-rigid behaviour connection, using unilateral contact-friction laws between interfaces beam, column, The model has been validated by previous experimental r...

There are two very different approaches to accommodating the possibility of occasional identity—that is, the possibility of certain objects being identical at one time but distinct at another. One approach, advanced by André Gallois, seeks to qualify Kripke‘s notion of rigid designation, while the other, originally advanced by George Myro, seeks to qualify Leibniz’s law instead. This paper focu...

A new technique is proposed for paratubal electromyography, using a surface, non-invasive, electrode applied transnasally under nasopharyngoscope guidance. This electrode records activity of the tensor veli palatini muscle during swallowing. This technique is of interest for two reasons: endoscopic guidance offers the possibility to check correct positioning of the electrode recording at tensor...

In this paper, two methods are described, by means of which it is possible to calculate the non rigid group of molecules consisting of a number of XH3 groups attached to a rigid framework. The first method is a combination of the wreath product formalism of Balasubramanian and modern computer algebra and the second method is a computational approach by using group theory package GAP. We apply t...

Understanding of articulated shape motion plays an important role in many applications in the mechanical engineering, movie industry, graphics, and vision communities. In this paper, we study motion-based segmentation of articulated 3D shapes into rigid parts. We pose the problem as finding a group-valued map between the shapes describing the motion, forcing it to favor piecewise rigid motions....

(Nov/03 draft, forthcoming in " Pacific Philosophical Quarterly " , comments to [email protected]) abstract In this paper I argue that questions about the semantics of rigid designation are commonly and illicitly run together with distinct issues, such as questions about the metaphysics of essence and questions about the theoretical legitimacy of the possible-worlds framework. I discuss in depth t...