1 7 Fe b 20 00 1 / f α fluctuations in a ricepile model

The temporal fluctuation of the average slope of a ricepile model is investigated. It is found that the power spectrum S(f) scales as 1/f α with α ≈ 1.3 when grains of rice are added only to one end of the pile. If grains are randomly added to the pile, the power spectrum exhibits 1/f 2 behavior. The profile fluctuations of the pile under different driving… CONTINUE READING