A light diffusion film includes a thermoplastic resin, a surface of the light diffusion film has a roughness of about 0. A UE comprises a connection-manager kernel that can be embedded at the SOC level to facilitate resource and memory control at SOC level. The arrangement of diffractive element set is computationally derived so that when the diffractive element set thus arranged is formed in or on a transmission grating, each diffractive element set would route, between corresponding input and output optical ports, a corresponding diffracted portion of an input optical signal incident on and transmitted by the transmission grating. A length of the lower mat in the longitudinal direction is longer than a length of the upper mat in the longitudinal direction. If so determined, the shared computing resources associated with the lock is configured.