Systems, devices and methods are disclosed for treating fractures. The system includes a pair of surgical instruments that are coupled to a pair of robotic arms. Also provided is a semiconductor nanocrystal complex with a shell grown onto the metal layer formed on the semiconductor nanocrystal core. A third embodiment of the present invention illustrates the use of an amplifier system useful for a low voltage input signal to reduce errors caused by variations in the base to emitter in the two transistors providing the amplification. In combination these traits set \u2018STARBRIGHT\u2019 apart from all other existing varieties of Philadelphus known to the inventor. The hearing aid further is programmed based on time-varying characteristics of the magnetic field.