A QUICK GUIDE TO FRACTAL BEHAVIOUR
Structure function:
   <(DSt)q> = <|S(t+t)-S(t)|q>
Scaling:
    <(DSt)q> = <(DST)q>(t/T)z(q)
    z(q) is the scaling exponent
Monofractal:      z(q) is linear
Multifractal:        z(q) is non-linear
Universal multifractal:   z(q)=qH-[C1/(a-1)](qa-q)
b=1+ z(2)