Abstract: An automated system is presented for unit testing an application in a mainframe execution environment. A plurality of stub objects reside in the mainframe execution environment, such that each stub object in the plurality of stub objects represents a different stub type. A command translator table is configured with an entry for each command available for an online transaction processor. Each entry in the command translator table specifies a stub type for the command and includes a listing of possible arguments associated with the given command, such that each possible argument in the listing of possible arguments has a specified category type. A test configurator executes in the mainframe execution environment and is configured to receive and parse a test input file. A setup routine interacts with the test configurator to receive records from the test input file.

Abstract: A vehicle safety parapet comprises a plurality of rails (18, 24, 28) supported at varying heights on uprights (12). A first of the rails comprises a steel box-section supported at each upright by bracketing means (20) configured to collapse when a horizontal impact load is applied to the rail, such that the first rail is displaced towards the upright. At least one other rail extends from the uprights by a greater distance than the first rail when the bracketing means has collapsed.

Abstract: A method and apparatus to calibrate an LED matrix display such that a driver will provide a proper precharge voltage to LED elements within the display during a scan period. A current is driven through a calibration element, and a voltage reflecting the steady-state element voltage is measured and stored as a calibration value. A processor controls whether to precharge during the calibration cycle, and determines when the calibration cycle is completed. During subsequent normal scans, a driver applies a voltage based on the stored calibration value to rapidly precharge parasitic capacitance associated with a display element to a proper value, and also drives a selected current through the device.

Abstract: A phase-locked loop circuit for providing a tightly controlled capture range for locking an output signal to a data signal, while also providing a wide frequency capture range for initially pulling the output signal within this narrow, predetermined frequency range. The apparatus detects a frequency difference between at least one reference signal and an output signal, and generates a frequency error signal in response to the frequency difference. A phase difference is detected between a received input signal and the output signal, and a phase error signal is generated in response to the phase difference. The frequency error signal and the phase error signal are combined to control the frequency of the output signal by controlling an input-controlled oscillator.

Abstract: A method and apparatus to calibrate an LED matrix display such that a driver will provide a proper precharge voltage to LED elements within the display during a scan period. A current is driven through a calibration element, and a voltage reflecting the steady-state element voltage is measured and stored as a calibration value. A processor controls whether to precharge during the calibration cycle, and determines when the calibration cycle is completed. During subsequent normal scans, a driver applies a voltage based on the stored calibration value to rapidly precharge parasitic capacitance associated with a display element to a proper value, and also drives a selected current through the device.