In a method of managing memory, a plurality of check values are generated from contents of memory. Utilizing the relationships among users to encourage them to provide their information in an exponential, potential reward structure, the system contacts a large number of users in a short time. During the process, a laser beam is directed onto the contiguous edges and along the corresponding part such that the edges are welded together. If the designated server determines that the data is consistent with the data rule, the write request is approved. The described composite membranes may be useful for separations, for example, of gases, liquids and solutions.