A5019443499- Balance, Gait, and Falls Prevention
- Lower Extremity Biomechanics and Pathologies
- Occupational Health and Safety Research
- Adhesion, Friction, and Surface Interactions
- Injury Epidemiology and Prevention
- Musculoskeletal pain and rehabilitation
- Effects of Vibration on Health
- Ergonomics and Musculoskeletal Disorders
- Tribology and Lubrication Engineering
- Sports injuries and prevention
- Diabetic Foot Ulcer Assessment and Management
- Traffic and Road Safety
- Muscle activation and electromyography studies
- Risk and Safety Analysis
- Heat Transfer and Optimization
- Occupational Health and Performance
- Sports Performance and Training
- Mechanical stress and fatigue analysis
- Surface Roughness and Optical Measurements
- Safety Warnings and Signage
- Winter Sports Injuries and Performance
- Refrigeration and Air Conditioning Technologies
- Quality and Safety in Healthcare
- Sports Dynamics and Biomechanics
- Heat Transfer Mechanisms
Liberty Mutual Research Institute for Safety
2006-2016
National Institute for Occupational Safety and Health
2011
National Institute of Occupational Safety and Health
2011
Korea Occupational Safety and Health Agency
2011
ITRI International
1994-2010
Harvard University
2005
General Electric (United States)
1994-1997
National Yang Ming Chiao Tung University
1994-1996
Digital Wave (United States)
1992
University of California, Berkeley
1986-1988
An elastic-plastic asperity model for analyzing the contact of rough surfaces is presented. The based on volume conservation an control during plastic deformation. Numerical results obtained from this are compared with other existing models that either purely elastic or plastic. It shown these limiting cases more general presented here. Some deviate appreciably previous analyses which do not consider conservation.
The friction force required to shear interface bonds of contacting metallic rough surfaces is calculated, taking into account the prestress condition asperities. are modeled by a collection spherical asperities with Gaussian height distribution. Previous analyses for adhesion and contact load such used obtain static coefficient. It shown that this coefficient affected material properties surface topography, it actually depends on external loading contrary classical law friction.
An improved DMT adhesion model in conjunction with an elastic-plastic contact is used to study of contacting metallic rough surfaces. The effects surface roughness and energy on the pull-off force significance are investigated. It shown that for clean surfaces quite large even relatively Adhesion negligible only contaminated or at very high external loading.
Background Urban taxi drivers differ from other professional in their exposures to physical and psychosocial hazards the work environment. Epidemiological data on low back pain (LBP) of this occupational group are very scarce.
This paper seeks to address questions related friction measurement such as how is human-centred assessment and actual slipping, repeatable measurements are. Commonly used devices for slipperiness are surveyed their characteristics compared with suggested test conditions from biomechanical observations summarized in Part 1. The issues of device validity, repeatability, reproducibility usability examined the published literature. Friction using mechanical described appears generally valid...
In 2007, the Bureau of Labor Statistics reported that incidence rate lost workday injuries from slips, trips and falls (STFs) on same level in hospitals was 35.2 per 10,000 full-time equivalents (FTE), which 75% greater than average for all other private industries combined (20.2 FTEs). The objectives this 10-year (1996-2005) longitudinal study were to: 1) describe occupational STF injury events hospitals; 2) evaluate effectiveness a comprehensive programme reducing incidents among hospital...
Slips and falls are a leading cause of injury at work. Few studies, however, have systematically examined risk factors slipping outside the laboratory environment. This study association between floor surface characteristics, slip-resistant shoes, cleaning frequency in limited-service restaurant workers.475 workers from 36 restaurants three major chains six states USA were recruited to participate prospective cohort workplace slipping. Kitchen roughness coefficient friction (COF) measured...
Objective: An enhanced methodology to extract the required coefficient of friction (RCOF) value was used investigate effects transverse shear component ground reaction force (GRF) on RCOF. Background: The RCOF is an important indicator for slip incidents. However, extraction from GRF not standardized. usually ignored in calculating value. Method: For this study, 40 participants performed four walking conditions. values both with (RCOF2) and without (RCOF1) were identified each strike by use...
IntroductionAlthough exercise and strength training have been shown to be protective against falls in older adults (aged 65 years older), evidence for the role of leisure-time physical activity (LTPA) prevention resulting injuries middle-aged 45–64 years) is lacking. In present study, we investigate association between self-reported engagement LTPA frequency fall-related among adults, while controlling key sociodemographic health characteristics.MethodsNationally representative data from...
An elastic-plastic impact model for spheres is introduced as the basis to study normal of rough surfaces. Statistics applied arrive at ensemble behavior many unit events alluded above, allowing investigation surface roughness effects. Dissipation kinetic energy increases such roughness, material compliance, and velocity increased. The rebound shown be dependent on topography properties, in addition velocity.