A method for fabricating a flash memory is described. A fifth portion of the first monopole antenna and a seventh portion of the second monopole antenna are formed to be adjacent to and to be substantially parallel to a grounding conductor provided outside the antenna apparatus. A wavelength of the reflected optical signal may be spread based on a strain being applied to the structure. At least one assembly part is formed on the peripheral wall and an insertion slot for receiving a fixing part is arranged at the assembly part axially. If an affiliated virtual environment application is copied to another hardware node without its virtual environment, the licensing server will not give the license activation key to this virtual environment application. In some embodiments, multiple tests may be configured to run orthogonally within user experiences without affecting the results of one another.