A method of an uplink transfer at the UE side in a wireless communications system over a wireless interface between a radio network and a user equipment node uses a first mode of transfer and a second mode of transfer. Preferably, the glass powder has a composition including SiO2, CaO, MgO, and TiO2 and the total content of these components is 80 mass % or more. Based on the volume, a sequence of movements of a surgical instrument for tissue removal device is planned, so as to predictably excise the desired volume of tissue. In this regard, the receiver allows the user to select one of the combinations, and in response, the receiver separates the video signal of the selected combination from the audio signal of the selected combination. During the run-up inter-val, the waveform of the alternating current IL is changed at least once to a spot-enforcing waveform in order to change the mode of attachment of the arc to the electrodes to spot mode.