Abstract: The disclosure describes techniques for detecting a crack or defect in a material.

Abstract: A computer system employs an integrated keyboard and pointing device to allow user input of alpha-numeric (typing) information, pointing direction information and pointing event information without moving the users's hands from the usual typing position on the keyboard. The new system has typing and pointing modes of operation. In the pointing mode, preassigned keyswitches are used to input pointing events, cursor speed changes, and other modifications to the system's operation. All such modifications are transparent to the operating system and application software because they are processed at keyboard interrupt level.

Abstract: A control device having a boxlike shaped enclosure that is held with both hands for tiling to produce corresponding tilt attitude control signals while the fingers of both hands are used to actuate switches symmetrically disposed on the top section of the enclosure to produce auxiliary control signals. The device is a non-joystick control box that provides easy reference to neutral and equally accommodates both left and right handed persons for rapid control of computers, video games, toys, vehicles, models, and machinery to which it is interfaced. The enclosuure can be contoured to represent the shape of the object being controlled.