OBJECTIVES To describe all terrain vehicle (ATV) ownership, access, use, and safety behaviours in rural Manitoba children. METHODS Questionnaire administered to a convenience sample of grade 6 students attending an agricultural fair. RESULTS 162 grade 6 children participated. The mean age was 11.4 years, and 46% were male. 125 students (77%) reported having access to ATVs, including 69 four...

This paper addresses modeling and global motion planning issues for an autonomous wheeled mobile robot moving on an uneven three-dimensional (3-D) terrain. We focus particularly on the issue of dealing with dynamic and wheel/ground interaction constraints. A key feature of our approach is that it incorporates appropriate physical models to cope with the task dynamics in the motion planning para...