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Additional processing was required to produce certain effects such as very long notes which could not be sustained by today 's singers . " You need to constantly remind people what has been accomplished , " agrees May Louie of the Boston RCI site . The professional category was established to accommodate specific needs in academic departments and support service units that require degree preparation . He wanted to see if anyone could develop a robotic arm driven by artificial muscles that could arm wrestle against a human and win . Nanosolar , in Palo Alto , California , which announced plans to build the world 's largest solar-panel plant , is using nanotechnology to devise solar cells that can be printed like newspapers . The substantia nigra is made up of cells called neurons or nerve cells that perform the work of the brain .