The present invention relates to a catalyst composition for the synthesis of thin multi-walled carbon nanotube and a method for manufacturing a catalyst composition. A training data network may provide a network linking a remote instructor operating an off-board data network with a student operating an onboard data network. Periodic validations of timestamps are used to identify lack of coherency of the cache, such as resulting from a network failure. A doped well region of a second conduction type overlies a drain zone of the first conduction type in the upper layer, and a heavily doped source region of the first conduction type contiguous to the gate trench and a heavily doped body region of the second conduction type are disposed in the well region at the upper surface of the device.