Abstract: Methods, systems, and apparatuses for tracking items automatically are ed. A radio frequency identification (RFID) tag is used with a material g system to enable the identification, location tracking, and managing of aviation assets, such as baggage and cargo, in an airport environment. For example, passive RFID tags are attached to an aviation asset. Antennas are placed at locations where monitoring of assets is necessary. A local controller and RFID reader use the antennas to communicate with the passive RFID tags to determine the identity and location of the asset.

Abstract: Methods, systems, and apparatuses for tracking items automatically are described. A radio frequency identification (RFID) tag is used with a material tracking system to enable the identification and locating of aviation assets in an airport environment. For example, passive (e.g., non-battery) RFID tags are attached to an aviation asset. Antennas are placed at locations where monitoring of assets is necessary. A local controller and RFID reader use the antennas to communicate with the passive RFID tags to determine the identity and location of the asset.

Abstract: Methods, systems, and apparatuses for tracking items automatically are described. A radio frequency identification (RFID) tag is used with a material tracking system to enable the identification and locating of aviation assets in an airport environment. For example, passive (e.g., non-battery) RFID tags are attached to an aviation asset. Antennas are placed at locations where monitoring of assets is necessary. A local controller and RFID reader use the antennas to communicate with the passive RFID tags to determine the identity and location of the asset.

Abstract: A method and apparatus that distinguish a valid touch from an optical aberration caused by unwanted objects and/or scratches in the light plane of an optical touch panel device is disclosed. During a training mode the device learns the relative position of "aberration dropouts" caused by the unwanted objects. During normal operating mode the relative positions of "touch and aberration dropouts" are generated and compared with the relative position of aberration dropouts to distinguish between aberration dropout signals and touch dropout signals. The touch dropout signals are subjected to further processing to determine the precise location of a touch while the aberration dropout signals are discarded.

Abstract: A switching regulator causes a supply voltage to be intermittently chopped to provide energy pulses in a lowpass filter circuit. The lowpass filter circuit includes a capacitor which is being charged by the chopped energy pulses and whose output is used to drive a low voltage stepper motor. The duty cycle of the energy pulses is a function of the average value of the stepper motor coil current. By correlating the duty cycle of the energy pulses with the average current in the motor coil a relatively high torque is provided to drive the motor during a startup phase and is automatically adjusted to meet the running requirements of the particular stepper motor.