In the current study, behavior of crank-slider mechanism with single and multiple clearance joints are analyzed. Using Lankarani-Nikravesh theory for estimating discontinuous contact forces in clearance joints, relevant systems have been mathematically modeled. Through numerical simulations, perturbations in response of mechanisms with clearance joints have been analyzed. Effects of increasing ...

In January 2014, the new ITU-T P.913 recommendation for measuring subjective video, audio and multimedia quality in any environment has been published. This document does not contain any time-continuous subjective method. However, environmental parameter values are changing continuously in a majority of outdoor and also most indoor environments. To be aware of their impact on the perceived qual...

The Japanese Orthopaedic Association hip disease evaluation questionnaire (JHEQ) was established as a new patient-reported outcome for patients with hip disease. We developed a JHEQ application beta version for tablet computers. The application has a slider system to input visual analogue scale (VAS) measurements. The purposes of this study were 1) to test whether the VAS that was acquired from...

Wear particles in a hard disk drive may cause the head/disk interface to fail. We have experimentally investigated wear particle generation resulting from fretting wear between the dimple on the suspension and the gimbal spring. We have found that increasing the normal load as well as using a low friction coating reduces the formation of wear particles. INTRODUCTION Examination of failed hard d...

In this paper, a constant speed control of slider-crank mechanisms for machine tools is proposed. A joint-task space hybrid controller based on second-order sliding mode and time-base generator was used to guarantee trajectory tracking complete turn the mechanism crank. switching criterion implemented in order avoid singularities located at two extreme positions slider stroke. trapezoidal profi...

Abstract Biomonitoring surveys for the presence of invasive species need effective and efficient methods. Molecular methods based on detection genetic material in environmental samples or DNA (eDNA) provide better resolution detection, especially elusive species. The eDNA-based method is an approach that has been widely used conservation business management because it a non-invasive method. Cyt...

Abstract In this work, we show that the differential kinematics of slider–pusher systems are differentially flat assuming quasi-static behavior and frictionless contact. Second, demonstrate state trajectories invariant to time-differential transformations path parametrizing coordinate. For one property allows impose arbitrary velocity profiles on slider without impacting geometry trajectory. Th...

Slide fasteners are one of the textile end-uses that have permeated daily life. The objective is to elucidate ways improve quality and value slide fasteners. In this report, from viewpoint tactile perception on tensile load transmitted user’s fingers through a slider in sliding fastener, sensory affective impressions (hereinafter referred as slide-feeling) quantitative evaluation indexes slide-...

Mechanical performance analysis and experimental study of the mechanics four-star-type crank-linkage mechanism marine air compressor were carried out to improve submerged floating stealth underwater vehicle meet demand its large diving depth. Firstly, we analyzed forces on mechanism, derived inertia moments proved advantages in balancing second-order reciprocating forces. The static strength so...