CONTEXT Knee injuries, particularly of the medial collateral ligament (MCL), are the most common injury sustained in American football. In 1979, Anderson et al described a knee brace that could protect uninjured knees from MCL injuries resulting from lateral impact. Since then, a number of light and free-moving bracing devices have been developed. However, the efficacy of prophylactic knee brac...

A mathematical model of a cracked rotor and an asymmetric rotor with two disks representing a turbine and a generator is uti­ lized to study the vibrations due to imbalance and side load. Nonlinearities typically related with a “breathing” crack are included using a Mayes steering function. Numerical simulations demonstrate how the variations of rotor parameters affect the vibration response an...

The spiral orientation of left ventricular (LV) fibers suggests that twisting about the ventricular long axis of the apex with respect to the base, i.e., torsional deformation, may be characteristic of LV contraction. To demonstrate this twisting motion, 10 orthotopic human cardiac allograft recipients were studied with biplane cineradiography of tantalum helices implanted within the LV midwall...

Within multiple design challenges, the lateral torsional buckling (LTB) analysis and stability check of structural glass members is a well-known issue for design. Typical examples can be found not only in slabs with slender bracing but also facades walls, where fins are used to brace vertical panels against input pressures. Design loads such as wind suction give place possible LTB LR at tension...

Steel angle sections are frequently employed in bracing systems or truss structures as single members built-up members. Angles may be coupled back-to-back to create Tee cruciform cross-sections. These sensitive torsional and flexural-torsional buckling due the cross-section shape fact that axial force not applied at shear centre. In this work, a comprehensive numerical investigation of behaviou...