This research investigates the effects of high frequency currents between 50 Hz and 150 kHz on operation Residual Current Devices (RCDs). Nowadays, increasing amount large power-electronic switching devices can be a source both harmonics (<2 kHz) supraharmonics (2-150 injected to grid. have several possibly lead unwanted tripping RCDs, due earth-currents that emitted by devices. The question...

deep rolling is a kind of mechanical surface treatments that can improve surface quality, dimensional accuracy and mechanical properties of the parts. compressive residual stresses generated by the process reduce the tensile stresses during loading into the workpiece. the distribution of residual stress induced by deep rolling can be influenced by rolling parameters; such as overlap of the roll...

Study Objective. To measure the association of symptoms attributed to residual effects of sleep medication (e.g., drowsiness, difficulty concentrating, and impaired memory) on self-reported functioning and satisfaction with these medications. Methods. Individuals using prescription medications for insomnia were invited to complete an Internet-based survey. Respondents were compared according to...