Abstract: A system for tracking the laboratory animal position and movement in a walled enclosure or cage for observation and evaluation is disclosed. The system consists of a plate placed on the bottom of the cage whereon multiple electrodes are configured as column-row two-dimensional electrode array, an electronic circuit detecting and measuring the capacitance between said electrodes, and a microprocessor determining the animal's location. The electronic circuit repeatedly measures the capacitance between the electrodes in a sequential manner. The animal's location and movement is determined by detecting the changes in capacitance on said plate.

Abstract: A system for tracking the laboratory animal position and movement in a walled enclosure or cage for observation and evaluation is disclosed. The system consists of a plate placed on the bottom of the cage whereon multiple electrodes are configured as column-row two-dimensional electrode array, an electronic circuit detecting and measuring the capacitance between said electrodes, and a microprocessor determining the animal's location. The electronic circuit repeatedly measures the capacitance between the electrodes in a sequential manner. The animal's location and movement is determined by detecting the changes in capacitance on said plate.

Abstract: A universal television and computer pointing control system is disclosed. The system is comprised of a handheld pointing device, a display control unit, and a command delivery unit. The system allows the user to simply point and click to control a computer or various home entertainment component devices remotely. Inside the handheld device, orientation sensors detect pointing direction. The pointing direction signals are transmitted to the display control unit, and a cursor (pointer) is drawn onto the screen indicating the pointer's location. By interpreting the pointing direction signals and the button activities, the display control unit issues a control signal to the command delivery unit. The command delivery unit then forwards the commands to the target device to execute the desired control function.