A system and method for monitoring rod moving coils in nuclear power system. The image input module receives an image and secret information and obtains at least one gray-level image according to image. The first light-shielding member and the second light-shielding member are used to limit the diameter of the at least one of the plurality of light beams. If the winning criteria are satisfied, information pertaining to event is recorded. The processing unit receives a selection corresponding to one of the photos, and recognizes at least one candidate photo from the photos according to a recognition method, wherein the candidate photo is identical to the selected photo. Also provided are reaction products of the described compositions, multi-layer articles comprising the compositions and reaction products, and methods for making the compositions, reaction products, and articles.