A method of semiconductor manufacturing to treat sidewall residue such that the side wall remains substantially vertical or peels back from the resist prior to removal of the resist by ashing or other means. A window shutter system is disclosed that includes a plurality of shutter frames. Preferably, the accessing and comparing are repeated for a plurality of viewers, wherein for each of the plurality of viewers a corresponding recommendation is generated for the video content resulting in a plurality of recommendations. When the security level of the MFP is lower, the audio data is played back in accordance with an alternative playback method indicated by the control information. Other embodiments are also described. The permeable section is sufficiently permeable to oxygen and carbon dioxide that live cells can be sustained, and is substantially impermeable to water and water vapor such that the covered containers can be stored in non-humidified chambers without substantial evaporation of water.