The inner ear is found in all vertebrates, with substantial variations in form and function. The inner ear is innervated by the eighth cranial nerve in all vertebrates.
The thyristor or silicon controlled rectifier, SCR is a device that has a number of unusual characteristics. It has three terminals: Anode, cathode and gate, reflecting thermionic valve / vacuum tube technology.
IRR is the discount rate that pushes the difference between the present value of cash inflows and present value of cash outflows to zero. It represents the rate of return an investment project is capable of generating over a specified time period.