Aircraft that have fuselages including a series of frames spaced apart according to a frame pitch. In order to use existing storage space effectively and, in particular, to obtain a compact structural shape, the mat has a fastener on two longitudinal edges, so that it can be folded-up to form a flexible container. The web applications, andor the web modules of the web applications, may include a designation file that identifies the shared web modules that are to be incorporated into the web modules for the web application. The semiconductor layer includes a first impurity semiconductor layer, a second impurity semiconductor layer, and an intrinsic semiconductor layer located between the first and second impurity semiconductor layers. The sodium vanadium oxide-based anode material prepared according to the present invention shows a small change in volume caused by an initial irreversible capacity and continuous chargedischarge reactions, and thus it is useful for providing a next-generation sodium ion secondary battery having stable chargedischarge characteristics and cycle performance.