A nonvolatile semiconductor memory with a plurality of banks in which copy back is performed between banks. This composition for forming an insulation film comprises a polymer of which the main chain is a chain portion which substantially contains only carbon, silicon and hydrogen, and which contains nitrogen in portions other than the main chain. An acetylene flow control system provides acetylene at a rate that causes the acetylene to be partially combusted in atmospheric oxygen through the acetylene burner assembly, so as to generate black smoke. The surface area of the top wall is less than the surface area of the bottom wall. Numerical results indicate that CPS QM-MSK and CPS QAM provides between several dB of gain, depending on constellation size, over PR-CPM and RC QAM, when compared at a given value of bandwidth, i. The beam breaker module can enable the projection device having single light to have several situation modes, and maintain the imaging contrast.