Abstract: A system and method for collecting and analyzing integrated circuit test vehicle test data by identifying various blocks of circuitry through at least two different intersecting test paths. In one embodiment, the process test circuits may be arranged in a matrix format and connected so that they may be tested along rows or columns. When a failure along a specific row and a specific column is identified, the process test circuit at the intersection may be identified as the failure point.

Abstract: The present invention is directed to a method of identifying duplicate data elements in large data sets. This involves receiving the data sets. Dividing each data element in the data set into a series of data segments to define data keys. Generating an intermediate value for the each element in the data set using summed values for the data keys. Sorting the data entries using the intermediate values. Sorting the matched intermediate value entries using the data keys. Identifying the duplicate data elements in the data set.

Abstract: A system and method for collecting and analyzing integrated circuit test vehicle test data by identifying various blocks of circuitry through at least two different intersecting test paths. In one embodiment, the process test circuits may be arranged in a matrix format and connected so that they may be tested along rows or columns. When a failure along a specific row and a specific column is identified, the process test circuit at the intersection may be identified as the failure point.

Abstract: A variable-ratio power transmission mechanism having two output shafts for driving respective wheels or tracks at opposite sides of a heavy off-the-road vehicle, and having a steering mechanism for varying the relative rotational speeds of said shafts, is known. Where the steering mechanism includes a null shaft which is not driven when straight-line travel is required, said shaft has been driveable by hydrostatic means, but these have sometimes proved unreliable. It is therefore proposed to drive the null shaft by mechanical two-speed gearing driven from the input of the power transmission mechanism. The null shaft is selectively driveable by said gearing in either direction of rotation through the appropriate one of two progressively engaging clutches until it attains a first speed, and an epicyclic reduction gear in said gearing is then locked up to drive the null shaft in the same direction at a higher speed.