OBJECTIVE To examine the problem of accidental injury to children on farms. DESIGN Prospective county based study of children presenting to accident and emergency departments over 12 months with injuries sustained in a farm setting and nationwide review of fatal childhood farm accidents over the four years April 1986 to March 1990. SETTING Accident and emergency departments in Aberystwyth, ...

We study the tractor and semi-trailer routing problem TSRP , a variant of the vehicle routing problem VRP . In the TSRPmodel for this paper, vehicles are dispatched on a trailer-flow network where there is only onemain depot, and all tractors originate and terminate in themain depot. Two types of decisions are involved: the number of tractors and the route of each tractor. Heuristic algorithms ...

Abstract Small organic farms still use potato lifters for harvesting. This harvesting technology involves a lot of work because potatoes need to be picked manually. The aim this study was design an innovative farming harvester aggregated with 38 kW tractor and analyse its strength the finite element method (FEM). research assumption fit construction basket in order minimise labour consumption c...

For the poor working conditions of tractors, single-motor drive tractors usually choose a motor with large parameters, which leads to lower efficiency under low-load conditions. Taking wheeled tractor YTO as research object, driving scheme dual-motor electric was proposed, and main components system were matched. Based on MATLAB/Simulink, model established. On premise meeting dynamic needs trac...