Background: Locking plate fixation provides satisfactory outcome following proximal humerus fractures. None of theprevious studies selectively evaluate the outcome in young patients. This study evaluates outcome of locking platesystem in the treatment of acute three- and four-part fractures in young patients.Methods: In this prospective study we included all patients who were less than 60 years...

OBJECTIVES This study sought to examine fatigue characteristics of 2 polyaxial locking screw designs: locking cap (LC) and cross-threaded (CT). The goal was to compare LC and CT implants at 0, 10, and 15 degrees of angulation to determine the effect of locking mechanism on screw-plate interface failure. The hypothesis was that LC implants would have superior fatigue properties in comparison to ...

Based on the modified compression field theory, this paper considers inter-locking force between recycled concrete aggregates and their effective grain sizes, establishes a shear model to describe accurately actual of beams with web reinforcement. Mathematical formulas for calculation interlocking are deduced, capacity can be estimated. The data five test 20 in open literature good agreement th...

Steel-concrete composite beams have been used in bridge construction for decades. Novel demountable bolted shear connectors, that allow disassembly and offer high level of prefabrication, are proposed the connection deck with steel beams, as an alternative to conventional headed studs. In terms sustainability, connectors facilitate replacement deteriorating components therefore extend design li...

This paper concerns the reliability of a pair of coupled oscillators in response to fluctuating inputs. Reliability means that an input elicits essentially identical responses upon repeated presentations regardless of the network’s initial condition. Our main result is that both reliable and unreliable behaviors occur in this network for broad ranges of coupling strengths, even though individua...

We consider a family of shell finite elements with quadratic displacements across the thickness. These elements are very attractive, but compared to standard general shell elements they face another source of numerical locking in addition to shear and membrane locking. This additional locking phenomenon – that we call “pinching locking” – is the subject of this paper and we analyse a numerical ...

The aim of this paper is to analyse a mixed finite-element method for computing the vibration modes of a Timoshenko curved rod with arbitrary geometry. Optimal order error estimates are proved for displacements, rotations and shear stresses of the vibration modes, as well as a double order of convergence for the vibration frequencies. These estimates are essentially independent of the thickness...

Transitions of tokamak confinement regimes from lowto highconfinement are studied on Alcator C-Mod [1] tokamak using gas-puff-imaging (GPI) with a focus on the interaction between the edge drift-turbulence and the local shear flow. Results show that the nonlinear turbulent kinetic energy transfer rate into the shear flow becomes comparable to the estimated value of the drift turbulence growth r...