A teardrop-shaped island cast adrift in the Indian Ocean, Sri lanka is filled with cultural and natural treasures. Indians, Portuguese, Dutch and British have all left their marks here, making for a delightful mix of ancient cities, monuments and grand colonial architecture.
An external ventricular drain (EVD) is a temporary drain that drains cerebro-spinal fluid (CSF) from the lateral ventricles in the centre of the brain to an external reservoir. The EVD consists of a thin plastic tube (catheter) which is placed into the ventricles of the brain and connected to an external drainage system. The two main reasons EVDs are inserted are:
The Electric Variable Transmission (EVT) combines a transmission with an electric motor to provide the illusion of a single CVT. In the common implementation, a gasoline engine is connected to a traditional transmission, which is in turn connected to an epicyclic gear system's planet carrier. An electric motor/generator is connected to the central sun gear, which is normally un-driven in typical epicyclic systems.