background: pedestrian injuries are a significant source of mortality and disability among children and prevention of it requires educational strategies and comprehensive approaches. this study was done to determine the effect of health education based on planned behavior theory (tpb) in promotion of safe behaviors in crossing the road among students, who are in four-grade in the primary school...

an evolutionary structural optimization (eso) method is used for plastic design of frames. based on safe theorems some criteria are derived and made an effort to satisfy them during the optimization process. in this regard, equilibrium is checked and yield condition is gradually satisfied during the optimization process. in this method, the amount of used material and the stiffness for each ele...