An assistant chief engineer of the Enterprise-D who, intoxicated by the Tsiolkovsky infection, pulls the isolinear chips out of the engineering control systems.
Jim Shimoda is an assistant chief engineer aboard the Enterprise-D in 2364. He appears in the first-season episode The Naked Now.
When the crew are infected by the contagion brought back from the science vessel Tsiolkovsky, which acts on the mind like alcohol, Shimoda is left in main engineering. Chief Engineer MacDougal is drawn away by a faked order, and Shimoda, left in charge and already affected, sits on the floor cheerfully removing the control chips from their slots and playing with them like toys.
The result is that the engines cannot be started as a fragment of a collapsing star heads for the ship. Data, working at speed, replaces the chips in sequence while Wesley's improvised repulsor beam buys the extra seconds needed.