The output signals of the rotary incremental encoder are used for motion sense discrimination, angular displacement and rotational speed measurement of the encoder shaft. The angular displacement can be measured with different resolutions. This paper presents an experimental system that enables the study of the rotary incremental encoder: working modes and methods for resolution improvement, di...

Turbo-generator shafts are often subjected to complex dynamic torsional loadings, resulting in generation and propagation of circumferential cracks. Mode III fatigue crack growth generally results in a fracture surface consisting of peaks and valleys, resembling a factory roof. The fracture surface roughness depends on the material microstructure, the material yield strength, and the applied cy...

background:   although intramedullary nailing (imn) is an established and accepted operative treatment for femoral shaft fracture in patients younger than 60, there is a lack of data on the results of this treatment on those over 60. the purpose of this study was to determine if the outcome of imn for femoral shaft fracture in elderly patients is also acceptable. particular challenges in this g...

Because of the deltaic nature Netherlands, deep soft soil deposits are widespread. Due to population density exploitation underground space is vital for commercial developments and transport networks. Piles used as primary support elements in excavations, cut cover tunnels, quay walls, flood defences provide uplift resistance base tunnels basements. This paper examines empirical correlations li...

The dynamic balancing of the drive mechanism for roller forming unit with balanced is consideredin order to increase reliability and durability. Two problems are solved in simulation process balancing: inertia forces which applied masses centers motion links, torque reduced rotation axis shaft, that arise from action.Wherein all kinematic characteristics trolleys determined, change functions ki...

normal 0 false false false en-us x-none ar-sa 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 diag...

in classical mechanics, considering hook’s law stress is a linear function of strain. while in strain gradient theory stress is a function of strain and strain differentials. in this paper, novel formulation relating stress and strain and also new boundary conditions are derived based on minimum potential energy principle. in strain gradient theory a length coefficient parameter is defined. thi...

The purpose of this study was to determine the reliability and validity of the GymAware optical encoder (Kinetic, Canberra, ACT) to measure displacement data (distance, peak velocity, mean velocity and time). Three GymAware sensors were attached to a Calibration Rig (CalRIG), a novel piece of technology engineered specifically for accurate calibration of dynamometry equipment. The CalRIG was pr...

BACKGROUND AND PURPOSE Hip dislocation in children with cerebral palsy (CP) is a common and severe problem. The Swedish follow-up program for CP (CPUP) includes standardized monitoring of the hips. Migration percentage (MP) is a widely accepted measure of hip displacement. Coxa valga and valgus of the femoral head in relation to the femoral neck can be measured as the head-shaft angle (HSA). We...