Abstract: In a method for the determination of a current initial rotational position of a rotor and in an arrangement for carrying out same, an incremental position encoder outputs an output signal. The output signal is produced by superposition of a chronologically random and systematically fluctuating signal interference on a basic signal, and composed of at least two component signals which change periodically in accordance with the rotational position of the rotor and are in a fixed angular relationship to one another. To determine the position, the output signal is used exclusively. The current initial rotational position of the rotor relative to a reference initial rotational position is determined by comparing the time profile of the portion of the systematically fluctuating signal interference of a current measured value sequence of the signal and the measured values of a signal sequence acquired starting from the reference initial rotational position.

Abstract: A system for creating queries for complex data structures includes a database populated with data relating to a manufacturing process and a graphical user interface accessed via a computer. The graphical user interface includes a tree domain and a query area, the tree domain including a tree representation of the data populating the database, wherein the tree representation includes graphical representations of attributes and/or structural-elements relating to the manufacturing process and populating the database. A mechanism is provided for dragging and dropping the graphical representations from the tree domain to the query area where the graphical representations are converted to a query based upon operators linking the graphical representations dragged and dropped from the tree domain.