STUDY DESIGN Cross-sectional. OBJECTIVE To determine if females presenting with patellofemoral pain syndrome (PFPS) from no discernable cause other than overuse demonstrate hip weakness and increased hip internal rotation, hip adduction, and knee valgus during stair descent. BACKGROUND Historically, PFPS has been viewed exclusively as a knee problem. Recent findings have indicated an associ...

Functional testing has advantages for testing more than one component of the motor system at once and can indicate the effects of aging. Timed stair tests provide a reliable, stable measure of function to give medical and rehabilitation professionals information about patient’s progress, comparison to a healthy population, and further practical goals. Because a timed stair test measures a great...

To evaluate point-of-decision prompts in the promotion of stair use in Germany, motivational posters were placed at three underground stations in Berlin. The proportion of passengers using stairs or stairways was counted before, during installation, and two weeks after removal of posters. In total, 5,467 passersby were counted. Stair use increased significantly in women, but not in men. The pre...

We present a compact silicon polarization rotator (PR) based on mode-hybridization by breaking the cross-sectional symmetry of a double-stair waveguide. The device fabrication is fully compatible with the commonly used silicon photonics processes with no extra masks required. The dependence of device performance on the double-stair waveguide dimensions is investigated using FDTD simulations. Ch...

Introduction Stair falls can be caused by inconsistent stair dimensions. During ascent, inconsistently taller risers lead to reduced foot clearances as the inconsistency goes unnoticed. A horizontal-vertical illusion increases perceived riser heights and clearance could offset over risers, though this might impact other safety measures. Method Twelve participants (age: 22 (3) years) ascended a ...

This paper focuses on the stair-climbing problem for a tracked robot. The tracked robot designed in this paper has the ability to explore stairs in an unknown indoor environment, climbing up and down the stairs, keeping balance while climbing, and successfully landing on the stair platform. Intelligent algorithms are proposed to explore and align stairs, and a fuzzy controller is introduced to ...

This paper deals with a new up-stair motion planning algorithm for a biped robot. The whole body of the humanoid can be visualized as a kinematically redundant robot, where the number of joints are more that the required degree of freedom. Based on the ZMP constraint equation, a sequential redundancy resolution algorithm is proposed, which ensures the ZMP trajectory, the planned operational mot...