Abstract: Techniques for modifying an abstraction level of a workflow are described. For example, a workflow may be analyzed to determine a first plurality of tasks, and the first plurality of tasks may then be combined into a first virtual task within an abstracted workflow. Then, the first virtual task may be linked to the first plurality of tasks, such that a virtual execution of the abstracted workflow corresponds to an actual execution of the workflow. In this way, the abstracted workflow may be shared with other parties, while a level of confidentiality associated with the workflow is preserved.

Abstract: In a method and apparatus for cleaning pipe-shaped filter elements arranged in a housing including a separation wall dividing the housing into a clean gas space and a raw gas space into which the filter elements extend from the clean gas space through the separation wall and the raw gas is directed from the raw gas space through the filter elements into the clean gas space while dust is removed from the raw gas and collected on the filter elements, the filter elements are cleaned from time to time by supplying momentarily pressurized flushing gas to the clean air space which, at the same time, is closed to generate a flushing gas pulse providing for a backflow of clean gas from the clean gas space to the raw gas space, which dislodges dust collected on the filter elements.