David J Feathers

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Space requirements for accommodating wheeled mobility devices and their users in the built environment are key components of standards for accessible design. These requirements typically include dimensions for clear floor areas, maneuvering clearances, seat and knee clearance heights, as well as some reference dimensions on wheeled mobility device sizes.(More)
BACKGROUND Students are faced with work demands requiring intense computer use throughout the week, often with cumulative hourly use per day exceeding that of adult workers. Extended daily computer use has been associated with a reported increase of musculoskeletal symptoms for college-aged students. New mouse designs offer alternative movement and postural(More)
OBJECTIVE To determine the minimum space required for wheeled mobility device users to perform 4 maneuverability tasks and to investigate the impact of selected design attributes on space. DESIGN Case series. SETTING University laboratory, Veterans Affairs research facility, vocational training center, and a national wheelchair sport event. (More)
BACKGROUND Assessing physical ergonomic factors within the classroom environment creates new opportunities to support designs that promote student well-being. Student-aged anthropometric data helps guide proper desk fit assessment, therefore facilitating scholastic performance through the reduction of distractions such as physical discomfort. OBJECTIVE(More)
BACKGROUND While there are many available tools and methods to evaluate product usability, few have been tested on user groups with disabilities and even fewer systematically consider universal design principles. OBJECTIVE This paper describes the development and preliminary psychometric testing of the Rapid Assessment of Product Usability & Universal(More)
This study developed an ergonomic evaluation system for the design of high-altitude partial pressure suits (PPSs). A total of twenty-one Chinese males participated in the experiment which tested three types of ergonomics indices (manipulative mission, operational reach and operational strength) were studied using a three-dimensional video-based motion(More)
BACKGROUND High-temperatures in the cockpit environment can adversely influence pilot behavior and performance. OBJECTIVE To investigate the impact of high thermal environments on Chinese pilot performance in a simulated cockpit environment. METHODS Ten subjects volunteered to participate in the tests under 40°C and 45°C high-temperature simulations in(More)
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