The analysis of the influence hull deformation on shaft alignment is predominately conducted using finite element method (FEM), which time-consuming, labor-intensive, and challenging to use for iterative design optimization. In this paper, separated into two parts—global local deformation, simplified a single-span beam model grillage model, respectively—then solved matrix displacement (MDM). Co...

Introduction: Posterior-stabilized total knee arthroplasty (TKA) has been widely used since its introduction nearly three decades ago, and long-term follow-up studies have reported satisfactory results. However, mechanical failure due to fracture of the tibial post recently has been described in several reports (1). The possible fracture mechanism was the repeated impingement between the interc...

This study aims to determine the effect of clearance and loading regarding displacement, distribution contact loads stiffness spherical roller bearings at rest. The displacement formulation inner ring bearing was developed by defining angle inclination element axis shaft. comparison between exact calculations using Matlab program numerical modeling with MSC Marc for has an error value less than...

The ideal size of intramedullary device to fix corrective osteotomy of proximal femur in abnormal bone in children and small patients may not be easily available. We report the successful use of Rush rod in combination with multiple Kirschner wires to fix the corrective osteotomy of coxa vara and shepherd crook deformity in two patients with osteogenesis imperfecta and fibrous dysplasia. The un...

This study was to investigate the clinical and radiographical outcomes of anterior spinal column reconstruction using structural femoral shaft allografts in osteoporotic patients. Retrospective analyses of medical records, radiographic parameters, and postoperative complications were performed in twenty-one patients who underwent anterior spinal column reconstruction surgery for osteoporotic ve...

This paper presents some recent validation results with velocity-based source BEM analysis program as applied to prediction of cavitation on rudder and podded propellers. The RANS solver is also applied to modelling of the rudder behind the propeller and the both BEM and RANS numerical predictions are compared with the experimental data. An example of prediction of cavitation on podded propelle...

Vector control has been widely used in control of permanent magnet synchronous motors (PMSM) where the information of rotor position is required. Shaft position sensor such as an optical shaft position encoder or Hall Effect sensor is fitted to provide a signal that is used to maintain an appropriate space angle between the stator and rotor fields in the motor. Even though this method is very p...

Accurate measurement of the alignment of the tibia is important both clinically and in research. The conventional method of measuring the angle of malunion after a fracture of the shaft of the tibia is potentially inaccurate because the mechanical axis of the normal bone may not pass down the centre of the medullary canal. An alternative method is described in which a radiograph of the opposite...

The articular surface of the humeral head is usually described as facing posteromedially, making an angle of between 16 degrees and 35 degrees with the transepicondylar plane. At hemiarthroplasty the articular surface also appears to be offset posteriorly with respect to the humeral shaft. Coracoid impingement may occur if this offset is not accommodated. An analysis was made of 29 cadaveric hu...