INTRODUCTION Arthrodesis of the ankle is an established operation. The lack of normal ankle movement after ankle arthrodesis reduced the ability of the patients to walk smoothly on the arthrodesis foot. It would have a more profound effect in negotiating stairs, because large ranges of dorsiflexion and plantarflexion are required to accomplish this activity. Although gait characteristics have b...

BACKGROUND Older adults often experience limited mobility, lower extremity muscle weakness, and increased fall risk. Furthermore, when older adults perform tasks that require control of submaximal force, impairments in their ability to maintain steady and accurate force output have been reported. Such problems may be related to deteriorating levels of mobility, particularly in older adults who ...

This study examined the relationship between perceived (stated) levels of function and the measured (observed) performance in squatting and stair climbing activities of 20 patients with chronic low back pain (CLBP) and 20 healthy volunteers. Subjects were asked through an interview to self-assess their ability to comfortably perform stair climbing and squatting as well as other tolerances. The ...

In a variety of applications in shallow water acoustics, coupled mode theory is an attractive model. In addition to the parabolic equation technique (PE), it is the only other numerically efficient model that provides the solution of the wave equation in a range-dependent environment. However, while the parabolic equation technique for propagation in the ocean over a bottom modeled as a fluid h...

In this chapter, we introduce a stair-climbing robot developed in our laboratory. This robot consists basically of two body parts connected by springs, and hops as a result of the vibration of a two-degrees-of-freedom (2-DOF) system. The excellent combination between the frequencies of the robotic body vibration and the tread-riser interval of stairs enables a small and simple robot fast stair ...

BACKGROUND Stair climbing helps to accumulate short bouts of physical activity throughout the day as a strategy for attaining recommended physical activity levels. There exists a need for effective long-term stair-climbing interventions that can be transferred to various worksite settings. The aims of this study were: 1) to evaluate short- and long-term effectiveness of a worksite stair-climbin...

This study examined the influence of tibio-femoral conformity on anteroposterior (AP) knee stability during stair descent, particularly with a dished cruciate sacrificing (CS) design. A joint simulator simulated stair descent of cadaveric knees. Tibio-femoral displacement was measured. Knees were tested in intact, ACL-deficient, and TKA with cruciate-retaining (CR), CS and posterior-stabilizing...

In 2012, the fishway in Miyanaka Intake Dam Niigata Prefecture, Japan, was reconstructed and divided into three fishways (ice-harbor-, stair-, rock-ramp-type) with different flow velocities water depths. We conducted an adaptive monitoring survey these from 2012 to 2020, 33 fish types were found, including migratory, swimming, small benthic fishes. Many species displayed a preference for specif...

Stair nesting allows us to work with fewer observations than the most usual form of nesting, the balanced nesting. In the case of stair nesting the amount of information for the different factors is more evenly distributed. This new design leads to greater economy, because we can work with fewer observations. In this work we present the algebraic structure of the cross of balanced nested and st...