Many systems pulse LEDs on and off, by applying power periodically or intermittently. These can tile the plane either periodically or randomly. The band quickly expanded and continued to perform live periodically. Both these events had continued to occur periodically. Periodic poling can be achieved by electrical poling with periodically structured electrode. Critics also said that visual glitches occur periodically. CAN Bus is used for exchanging information between operational units periodically or on demand. Practically this is done by defining a cost function that is evaluated periodically during learning. The tones are so close that some decoders may periodically false trigger. The process is based on mutually agreed priorities that are reviewed periodically. She had frequent legal trouble and periodically experienced suicidal depression. During their time as larva they are capable of releasing gametes periodically. There are various Evangelical Protestant communities that gather periodically. It is normal to have to relight a pipe periodically. This can be achieved with periodically constructed metamaterials.