A method of treating Alzheimer’s disease is disclosed. The at least one composite conductive core includes at least one conductive core and at least one carbon nanotube yarn spirally wound on an outer surface of the at least one conductive core. The data files are allowed to be written to the removable medium if the security level of the data files is equal or lower than the security level of the removable medium. Preferred embodiments of structured packing and monoliths are disclosed each having a catalyst for oxidizing the volatile organic compound. The graphical user interface further allows a user to adjust the luminance of the pixels in the image. Inclined or curved surfaces are formed at both sides in a track width direction of the return yoke layer, the inclined or curved surfaces gradually broadening the dimension of the return yoke layer in the track width direction as the inclined or curved surfaces extend from front end surfaces thereof exposed to the opposing surface opposite the recording medium in the height direction.