In this report the transient rocking response of electrical equipment subjected to trigonometric pulses and near-source ground motions is investigated in detail. First the rocking response of a rigid block subjected to a half-sine pulse motion is reviewed. It is shown that the solution presented by Housner (1963) for the minimum acceleration amplitude of a half-sine pulse that is needed to over...

The predisposition of a slope to generate rockfalls is related the intensity rock mass jointing and geometric arrangement discontinuities intersecting face. With increasing use terrestrial laser scanner (TLS) in surveying, methods have been proposed semi-automatically extract spatial properties outcropping from high-resolution topographic data. present paper builds upon one such (named DiAna), ...

This paper describes a robotic manipulation primitive called toppling—knocking a part over. We derive the mechanical conditions for toppling, express these as constraints on robot contact locations and motions, and describe an application of toppling to minimalist parts feeding of 3D objects on a conveyor with a 2 joint robot.

This paper describes a manipulation primitive called toppling—knocking a part over. We derive the mechanical conditions for toppling and describe two applications to conveyor-based parts feeding. Toppling complements previous approaches to conveyor-plane feeding, allowing full three-dimensional parts feeding on a constant-speed conveyor.

We consider a sensorless approach to feeding parts on a conveyor belt using pins (rigid barriers) to topple parts into desired orientations. Given the n-sided 2D convex projection of an extruded polygonal part, its center of mass (COM), and coefficients of friction, we develop an O(n) algorithm to compute the toppling graph, a new data structure that represents the mechanics of toppling includi...

Objective: To evaluate the influence of the surface used for manipulation (paper block and glass slab) on the mechanical properties (flexural strength and elastic modulus) and ion release (F) of two resin modified glass ionomer cements (RMGIC). Methods: Two RMGICs: Vitro Fil LC (DFL) and Riva Light (SDI) were used. The materials were manipulated on two different surfaces: block of paper and gla...

Abstract The contributions of the current analytical models on prediction stability slope subjected to slide head toppling failure mechanisms, have always focused idealized geometry comprising regular blocks dipping into face. Besides, influence groundwater and stabilizations from lowermost block been overlooked in available literature. In this article, solutions that incorporates kinematic mec...

Metal mines mined using the sublevel caving method often exhibit various environmental problems on ground surface. This can affect safety of production process in mining area. A numerical model Universal Distinct Element Code has been established to investigate deformation failure giving rise this underground mining. The calculations are combined with in-situ monitoring data collected over a pe...

Toppling of individual rock blocks resting on an inclined surface has often been observed in nature. This instability mechanism typically analysed for simple block geometries, considering the contact between and base where it lies is a planar surface. In this study, authors analyse case regularly rough To do that, resort to analytical limit equilibrium formulations, laboratory physical models d...