“…The choice of the cut-off moment ω0=2.5, i.e., the 12 years, has been widely described in the paper (Kufel, 2003). A description of the cyclic clock can be found in several articles (Van Ruth, Schouten, and Wekier, 2005;Abberger and Nierhaus, 2010;Ulrichs and Błażej, 2014;Kufel et. al., 2015).…”