In cases of established calcaneus after anterior poliomyelitis the deformity can be greatly reduced by combining an extensive plantar release with an oblique transverse osteotomy of the calcaneus that permits displacement upwards and backwards of the posterior weight-bearing part of the bone. The procedure greatly improves the mechanical advantage of subsequent tendon transplantations to the he...

Bioenergy through short rotation forestry could hold potential for fossil fuel displacement mitigating enhanced climate change by using various combustion, carbon capture technologies, and sequestration technologies. Two routes, gasification and pyrolysis, show potential for enabling bioenergy to become carbon negative rather than carbon neutral. One further relatively unexplored route is bioch...

BACKGROUND The knee joint is a bicondylar hinge two-level joint with six degrees of freedom. The location of the functional axis of flexion-extension motion is still a subject of research and discussions. During the swing phase, the femoral condyles do not have direct contact with the tibial articular surfaces and the intra-articular space narrows with increasing weight bearing. The geometry of...

A small scale, high precision co-ordinate table was developed as part of a project to solve measurement problems originating from microtechnic. Construction with a single reference surface was selected and vacuum preloaded air bearing applied in order to enable smooth motion and eliminate stick slip. Laser interferometers were applied to measure both the displacement and the angular error. The ...

Abstract This paper includes three sections. Truss structures have been widely applied in bridges and buildings due to their light weight, reasonable load-bearing, high material utilization rate. For truss serving as load-bearing carriers, structural strength should be guaranteed, moreover, economic performance considered. First, the finite element theory was introduced, computer-aided simulati...

High cutting speeds and feeds are essential requirements of a machine tool structure to accomplish its basic function which is to produce a work piece of the required geometric form with an acceptable surface finish at as high a rate of production as is economically possible. Since bearings in high speed spindle units are the main source of heat generation. Friction in bearings causes an increa...

The columns of frame structures are the key load-bearing components and the exterior columns are susceptible to attack in terrorist blasts. When subjected to blast loads, the columns would suffer a loss of bearing capacity to a certain extent due to the damage imparted which may lead to their collapse and even cause the progressive collapse of the whole structure . The concrete-filled steel col...

Progressive collapse is defined as the spread of an initial damage from one member to another, leading to extensive partial or total collapse of the structure. In this research, the potential of progressive collapse due to a sudden removal of vertical load-bearing elements in reinforced concrete buildings structures with different floor plans such as geometrical regular and irregular floor plan...

Fins incorporated into the design of a dynamic cervical spine implant have been employed to enhance axial load- bearing ability, yet their true biomechanical advantages, if any, have not been defined. Therefore, the goal of this study was to assess the biomechanical and axial load-bearing contributions of the fin components of the DOC ventral cervical stabilization system. Eighteen fresh cadave...

Bridge bearings are critical components in bridge structures because they ensure the normal functioning of bridges by accommodating long-term horizontal movements caused changing environmental conditions. However, abnormal structural behaviors displacement observed when integrity is degraded. This study aims to construct an accurate prediction model for under varying external conditions support...