Power-backup capabilities are provided by implementing a variety of different methods, systems and devices. The locomotion device is based upon rotating pinching organs, associated actuators, and transmission systems wherein the rotating pinching organs are placed side by side and rotate in an opposite direction in order to draw and retain a tissue portion and establish an anchoring point of the locomotion device onto the substratum. Thereby, an electrode material that can be stably filled in an electrode groove formed on a semiconductor device and that an electrode with narrow line width and small resistance loss can be easily formed by, and a solar cell with high power having an electrode formed by using the electrode material are provided. The document may be determined to contain an image gallery when the position information indicates that the images in the document are generally evenly distributed.