Figure 2: Radon concentrations and Hurst exponent evolution in dwelling D2. In all Figures, the top sub-Figure is the evolution of radon concentration, the middle sub- Figure is the evolution of Hurst exponent and the bottom sub-Figure is the evolution of the square of the linear correlation coefficient. R/S analysis: (a) sliding-window of length 8,step 1; (b) sliding-window of length 32,step 1; (c) lumping of window-length 32.