BACKGROUND Fixation of an anterior cruciate ligament graft at the joint line with an interference screw restores anterior laxity better than low-stiffness distal fixation with double staples and sutures tied to a post at implantation in porcine bone. HYPOTHESIS Fixation of an anterior cruciate ligament graft with a high-stiffness distal fixation device restores anterior laxity and knee stiffn...

The robots are interacting with humans in various aspects. Safety issues are increased in various robot applications. Many robot arms have been introduced for safety. The passive compliance methods have faster and high reliability than active methods. In this paper, a new safety mechanism based on passive compliance is proposed. The variable stiffness joint employed spring and roller is economi...

2.02.4.1 Finite-strain Effects in Bulky or Massive Bodies 71 2.02.4.2 Nonlinear Finite-strain Effects in Columns, Plates and Shells Soft in Shear 72 2.02.4.3 Discrepancy between Engesser’s and Haringx’s Formulas: New Paradox and its Resolution 73 2.02.4.4 Shear Stiffness Associated with Second-order Strain 74 2.02.4.5 Differential Equations of Equilibrium Associated with Different Finite-strain...

New generation robots, meant for physical human robot interactions, are no longer rigid; it has become soft in terms of introduction of considerable flexibility at the actuated joints, flexibility of the links and in terms of compliant coverings. Safety requirement becomes primary in situations where physical interactions occur, calling for compliance; but accuracy and control bandwidth get com...

OBJECTIVE To determine the association between joint complaints and locomotor disability. METHODS During a home interview survey 1901 men and 3135 women aged 55 years and over (the Rotterdam Study) were asked about joint pain and morning stiffness in the past month, and locomotor disability was assessed by six questions from the Health Assessment Questionnaire (HAQ). RESULTS The prevalence ...

this article presents the seismic vulnerability assessment of the s. joão de loure bridge, inportugal. the single span steel bridge has riveted joints, commonly affected by corrosion,which can lead to a significant stiffness reduction. with the objective of evaluating theinfluence of the joints stiffness in the structural response of the bridge, a structural model ofthe bridge was created, and ...

Drilling and blasting have numerous applications in the civil and mining engineering. Due to the two major components of rock masses, namely the intact rock matrix and the discontinuities, their behavior is a complicated process to be analyzed. The purpose of this work is to investigate the effects of the geomechanical and geometrical parameters of rock and discontinuities on the rock mass blas...

UNLABELLED To present the arthroscopic surgical technique and the evaluation of the results from this technique for treating elbow stiffness. METHODS Between April 2007 and January 2010, ten elbows of ten patients with elbow stiffness underwent arthroscopic treatment to release the range of motion. The minimum follow-up was 11 months, with an average of 27 months. All the patients were male a...

The effects of long-term spaceflight (90-180 days) on the contractile and elastic characteristics of the human plantarflexor muscles were studied in 14 cosmonauts before and 2-3 days after landing. Despite countermeasures practiced aboard, spaceflight was found to induce a decrease in maximal isometric torque (17%), whereas an index of maximal shortening velocity was found to increase (31%). In...

We have previously shown that abduction angular perturbations applied to the knee consistently elicit reflex responses in knee joint musculature. Although a stabilizing role for such reflexes is widely proposed, there are as of yet no studies quantifying the contribution of these reflex responses to joint stiffness. In this study, we estimate the mechanical contributions of muscle contractions ...