OBJECTIVE To assess the interaction of foot placement, trunk frontal position, weight-bearing and knee moment asymmetry at seat-off when rising from a chair. DESIGN Cross-sectional study. SUBJECTS Seventeen subjects with hemiparesis and 15 healthy controls. METHODS Trunk position, weight-bearing and knee moment asymmetry were quantified by kinetic and kinematic analysis when the subjects ...

When the major portion of a weight-bearing joint such as the ankle is fractured and displacement occurs, accurate reduction is essential if late osteoarthritic changes are to be avoided. In many trimalleolar fractures the posterior malleolar fragment is small and simple manipulative treatment and plaster fixation is satisfactory. If, however, the posterior malleolar fragment constitutes one-thi...

This article describes an instrument to measure the error motion of rolling element bearings. This challenge is met by simultaneously satisfying four requirements. First, an axial preload must be applied to seat the rolling elements in the bearing races. Second, one of the races must spin under the influence of an applied torque. Third, rotation of the remaining race must be prevented in a way ...

[Purpose] The purpose of this study was to examine the effects of Tai Chi (TC)-based exercise on dynamic postural control during obstacle negotiation by subjects with mild or moderate Parkinson's disease (PD). [Subjects] Twelve subjects (mean age, 65.3±6.1 years) diagnosed with idiopathic PD were enrolled for this study. [Methods] All the subjects were tested a week before and 12 weeks after th...

Roadways supported by bolts contain support structures that are built into the rock surrounding the roadway, referred to as reinforced rocks in this paper. Using physical model simulation, the paper investigates the bearing characteristics of the reinforced rock under different bolt parameters with incrementally increased load. The experimental results show that the stress at the measurement po...

OBJECTIVE To demonstrate the effectiveness of functional treatment for the fractures of the metatarsal, which consisted of immediate or early weight bearing without immobilisation. MATERIAL AND METHODOLOGY We prospectively studied 276 patients with simple or complex fractures of the metatarsal, treated with a functional method which consisted of immediate (before the 3(rd) day since the fract...

This study fabricated friction pendulum (FP) and rolling (RP) seismic isolation systems using 3D printing to conduct 1g shaking table tests of pile-supported structure models incorporating these systems. The test results indicate that, when the FP bearing was applied pile heads, acceleration response decreased once began operate; as input earthquake frequency increased (1, 3, 10 Hz), system eng...

In this work, single-asperity contact mechanics is investigated for positive and negative work of adhesion Δγ. In the latter case, finite-range repulsion acts in addition to hard-wall constraints. This constitutes a continuum model for a contact immersed in a strongly wetting fluid, which can only be squeezed out in the center of the contact through a sufficiently large normal load F N. As for ...

Olfaction plays many well-established roles in vertebrate sensory perception [1, 2]. More controversial is the claim that olfactory cues underlie the large-scale geographic "map" sense used by birds and other vertebrates [3, 4]. The most common procedure used to investigate the role of odors in avian homing is to experimentally produce anosmia and/or block access to natural odors [4, 5]. Althou...

PURPOSE All-ceramic abutments are employed increasingly often in implant dentistry for esthetic reasons. In vitro stress testing is required to evaluate the suitability of these constructions, especially in load-bearing posterior regions. The purpose of the study was to assess and compare the fatigue and fracture resistance of one- and two-piece computer-aided design/computer-assisted manufactu...