Gel-based, dry and modified-dry electrodes for direct current electroencephalography in hyperventilation and apnea / by Yeo, Yi Lin, 1994-, author 655352, Maheza Irna Mohamad Salim, supervisor 1983- 516061, -Ing Eko Supriyanto, supervisor 612293, Fakulti Kejuruteraan Elektrik 540663