Showing papers in "The Chronicle of higher education in 2000"

Virtual Reality on a Desktop Hailed as New Tool in Distance Education.

Abstract: A method of making plastic optical fibers in which a tubular plastic sheath is heated to a predetermined temperature in a vacuum chamber, a rod-like plastic core is inserted into the sheath in the vacuum chamber and the assembly is allowed to cool in the vacuum chamber to room temperature. The internal diameter of the sheath at the predetermined temperature is greater than the outer diameter of the core at room temperature so that said core can be inserted into the tube at the predetermined temperature. The internal diameter of the sheath at room temperature is less than the outer diameter of the core at room temperature so that when said assembly is allowed to cool from the predetermined temperature to room temperature, the tube will shrink tightly onto the core.