The non-return mechanism is the key device that plays role of braking in opening-and-closing electric actuator an amphibious aircraft hatch door. ball-and-socket contact pair, providing pressing force, and multi-disc friction supplying torque, are two core components mechanism. In this paper, dynamic model established considering freedom rotation-translation. Based on MATLAB/Simulink, solution ...

Background: Robotic needle insertion in biological tissues has been known as one the most applicable procedures in sampling, robotic injection and different medical therapies and operations.Objective: In this paper, we would like to investigate the effects of angular velocity in soft tissue insertion procedure by considering force-displacement diagram. Non-homogenous camel liver can be exploite...

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 More than four decades have passed since the first clinical use of an (IABP) to improve the clinical scenario for patients with chronic left ventricular failure. The original IAB catheter size was 15 French (Fr), requiring an open surgical insertion and removal. This therapy has now become the most widely used mechanical device for failure of the left ventricle. The introduction of...

abstract   background: fractures of the tibia are important for their commonness and controversy in their management. both conservative and surgical techniques have been introduced in an effort to speed time to :::::union::::: while minimizing the occurrence of complications. standard treatment for low-energy tibial shaft fractures includes closed reduction and cast immobilization. the purpose ...

To reduce the transmission of shafting longitudinal vibration in surface ships, a design thrust bearing integrated with internal disc springs is proposed and characteristics are studied. According to structural deformation springs, specific size combination forms designed, effective schemes achieved according static dynamic requirements. With integration into bearing, peak displacement response...

Retrograde locked intramedullary nailing has gradually been widely used to treat femoral supracondylar fractures. Because a standard femoral supracondylar nail has unique disadvantages: high price and potentially inducing a femoral shaft stress fracture, it is often replaced by a traditional femoral or tibial locked nail. A biomechanical comparison was therefore made between both traditional lo...

Progression of hip displacement is common in patients with cerebral palsy (CP). We aimed to investigate the rate of progression of hip displacement in patients with CP by assessing changes in radiographic indices according to Gross Motor Function Classification System (GMFCS) level during hip surveillance. We analyzed the medical records of patients with CP aged < 20 years who underwent at leas...

The medial periosteal hinge plays a key role in fractures of the head of the humerus, offering mechanical support during and after reduction and maintaining perfusion of the head by the vessels in the posteromedial periosteum. We have investigated the biomechanical properties of the medial periosteum in fractures of the proximal humerus using a standard model in 20 fresh-frozen cadaver specimen...