Provided are a light emitting device, a light emitting device package, and a lighting system including the light emitting device and the light emitting device package. The system includes a marking device for placing an instruction indicia on the hard copy print for modifying the image; and a scanning device for reading the instruction indicia and the image. When a blowing agent is injected into the nanocomposite in an extruder or a batch mixer, polymeric foam can be produced. The sleep-related signals may be derived from implantable or external sensors.