The memory element of the present invention utilizes a substrate, a first conductive connection, a second conductive connection, and an ionic layer. We found that highly-purified cardiomyocytes isolated from adult mammalian hearts dedifferentiated rapidly when cultured in mitogen-rich medium. A number of component files may be created, compressed and saved, at the respective bit rates, based on the identified respective portions of content of the file. The display article has means thereon for providing a visual indication. The method also includes cutting along a cutting line such that the path of the cutting line of the individual air bag cut-out to be cut out does not correspond, in the area of the corners of the longer trapezoid side, to the contour edge but, instead, to contribute to the formation of the height of the three-dimensional air bag,extends inwardly.