In this paper we study load balancing in wireless mesh networks when the MAC layer of the network is modelled by STDMA. We formulate the linear problem for joint optimization of traffic allocation and transmission schedule. Both unconstrained path set, allowing arbitrary routing, and predefined paths are considered. In our numerical examples roughly third of the load of the most congested link ...

For robots with joint elasticity, discrepancies exist between the motor side information and the load side (i.e., end-effector) information. Therefore, high tracking performance at the load side can hardly be achieved when the estimate of load side information is inaccurate. To minimize such inaccuracies, it is desired to calibrate the load side sensor (in particular, the exact sensor location)...

Dual-arm robotic system for load transportation in hazardous environments is considered in this study. First, physical model of the robot arms with the load is presented and related equations of motion are obtained. Friction forces arising on the contact points between the load and robot arm tips are also taken into account. Then, robust non-chattering sliding mode control is used in order to o...

INTRODUCTION It has been shown that walking kinematics remain near to normal after mobile bearing total ankle replacement (TAR). However, no information is available on mechanical joint loading. The purpose of this study was to determine whether mechanical load and 'quasi-stiffness' of the ankle joint after TAR differs from the normal load and stiffness of a healthy ankle joint during walking. ...

BACKGROUND Numerous biomechanical studies of the lateral ankle ligaments have been reported; however, the isolated function of the calcaneofibular ligament has not been clarified. We hypothesize that the calcaneofibular ligament would stabilize the ankle joint complex under multidirectional loading, and that the in situ force in the calcaneofibular ligament would change in each flexed position....

This study measured the screw joint preload of the implant-abutment interface for 7 common hex-top abutment systems. Increasingly, prosthetic designs are utilizing a direct prosthetic connection to the implant, placing the implant-abutment screw joint under direct functional loads and moments. Sufficiently high screw joint preloads are required to maintain screw joint integrity and confer clini...

Bilateral decline squatting has been well documented as a rehabilitation exercise, however, little information exists on the optimum angle of decline. The aim of this study was to determine the ankle and knee angle, moments, the patellofemoral joint load, patellar tendon load and associated muscle activity while performing a double limb squat at different decline angles and the implications to ...

Knee joint strains are common in the knee joint injuries caused by sports project. Knee joint strain refers to subtle nutrition metabolic disorder induced by local fatigue of knee joint and micro-tissue damage caused by different loading cases when anatomical structures of knee joint has excess load in sports. Knee joint strain occurs frequently in causes of transition during acute phase, stop ...

Many previous studies have mainly focused on the effects of riveting parameters single-row riveted lap joints. Little attention has been paid to multi-row The outer rows a normal joint usually bear larger part tensile load. However, none relate phenomenon squeezing displacement combination joint. To improve performance three-row joint, this paper aims reveal internal relation between load distr...

geometrical profile (roughness) of joint surfaces influences the behaviour of rock joints under shear loading. with regard to the dilation, there are two models of direct shear test that may simulate the original loading condition existing in the location from where the specimens have been sampled. the first model in which the normal load is constant (cnl) and the discontinuity is free to dilat...