Patterns of spontaneous and evoked body movements during sleep
Two sleep-related movement periodicities were found in 5,742 pooled actigrams: in spontaneous movements and in movements evoked by aircraft noise. The former appeared to be associated with stage 3+4 sleep and the latter with rapid eye movement sleep
This study investigates the effects of Pierson-Moskowitz, Jonswap spectrum that are typical irregular wave spectrums for wind turbine system with jacket support structure. Also various offshore environmental parameters based on korean local condition were used in our study. The loads acting on the system was considered by referring to the Design Load Case from IEC guide line. And improved von Karman model was used as a turbulence model. As a result, various significant wave height and peak spectral period cause noticeable difference of extreme and fatigue loads prediction.