OBJECTIVE To assess outcomes of trauma caused by television sets falling onto children. METHODS Retrospective review of medical charts of 183 children aged 7 years and younger hospitalized for injuries caused by falling television sets. Descriptive statistics were applied. DATA SOURCES Phase 2 (1988-1995) and phase 3 (1995-1999) of the National Pediatric Trauma Registry. OUTCOME MEASURES ...

Cavitation damage in flexure bars crept at 1170°C was studied by a density measurement technique. The cavity density within the flexure beams could be approximated by a linear function of position from the tensile surface. A threshold stress for cavitation damage is suggested from the results of this study. Below the threshold tensile stress, cavitation ceases, whereas above the threshold, cavi...

A numerical study of the elastic-plastic mode-II fracture of adhesive joints is presented in this paper. A traction-separation law was used to simulate the mode-II interfacial fracture of adhesively-bonded end-notched flexure (E.N.F.) specimens loaded in three-point bending, with extensive plastic deformation accompanying failure. The fracture parameters for the traction-separation law were det...

Fl substitute for positioning m flexure hinge paper, a p mechanism is hinge modeli that includes analytic stiffn presented. Fir considered. T not coinciden axial elongat mechanism f problem, a 2 additional mo part. On the ensured. The through both emphasizes t significant to micro-mechan Micro positi technology i Microscopy ( micro machin studies on t mechanisms (Moriyama, e Ryu, et al. [4] mod...

The Mode I and II Interlaminar Fracture Toughness (IFT) of Vectran/Epoxy composite material were investigated using the Double Cantilever Beam (DCB) 4 End Notched Flexure (4ENF) methods, respectively. Due to relatively low compressive strength Vectran (<10% its tensile properties), specimens hybridised by over wrapping with T800s/M21 prevent failure during testing. Experimental results then sim...

This paper focuses on the complex design process of planar compliant mechanisms with flexure hinges. In the following a systematic methodology of the transition from lever mechanisms generated intuitively by the developer or non-intuitively by topology optimization to applicable compliant mechanism is presented. An extended pseudo-rigid-body model (PRBM) is used for the analysis and the modific...

This paper presents parallel kinematic XY flexure mechanism designs based on systematic constraint patterns that allow large ranges of motion without causing over-constraint or significant error motions. Key performance characteristics of XY mechanisms such as mobility, cross-axis coupling, parasitic errors, actuator isolation, drive stiffness, lost motion, and geometric sensitivity are discuss...

The Southwell Topple is a spectacular example of toppling failure on the southeastern coastline Isle Portland, south coast England. Types mass movements, which occur around almost entire Portland and include some other much smaller but well-known topples, vary depending local geological topographical contexts. ‘Southwell Landslide’ 1734 (i.e. Topple) differs in most respects from all others, no...

This paper proposes a novel analytical model for flexure-based proportion compliant mechanisms. The displacement and stiffness calculations of such flexure-based compliant mechanisms are formulated based on the principle of virtual work and pseudo rigid body model(PRBM). According to the theory and method, a set of closed-form equations are deduced in this paper, which incorporate the stiffness...

We study the nature of statistical correlations that develop between systems of interacting self-organized critical automata (sandpiles). Numerical and analytical findings are presented describing the emergence of "synchronization" between sandpiles and the dependency of this synchronization on factors such as variations in coupling strength, toppling rule probabilities, symmetric versus asymme...