Abstract: For migrating process instances, first input information describing changes between a first process template and a second process template is received. Second input information describing grouping of said changes is also received. A set of combinations of the first process template and the second process template is determined by applying the changes to the first process template in complete groups as defined by the second input information.

Abstract: Transactions within a process model are determined by grouping a set of individual process activities into a single transaction. This effectively reduces the processing overhead, and, therefore, improves the overall throughput and latency of the execution of the process model. The transaction is determined by performing an optimization procedure that takes into account the structure of the process model as well as various properties of the single process activities of the process model. Analysis of the properties of the process activities as well as application of the optimization procedure is performed dynamically during execution of the process model by a workflow engine.

Abstract: The present invention provides a method, a data processing system as well as a computer program product for optimizing process properties for workflows with failing activities. The invention makes use of monitoring occurrence of failure of each activity of a process model of a workflow and further monitoring properties that are associated to compensating activities that are required in order to repair the failure of an activity. The method makes explicit use of determining alternative execution sequences and selecting one of the plurality of alternative execution sequences of the process model, that optimizes the process property in case of failure of an activity of the process model. The process model itself remains unaffected and need not to be remodeled.

Abstract: The invention relates to a proton-conducting polymer membrane and to a method for the production thereof. Starting from a catalyst layer, which is homogeneously deposited on the polymer membrane (3), the catalyst layer is subdivided into a number of catalyst segments (1a, 1b) by microstructuring so that adjacent fuel cell units of a planar fuel cell arrangement can be realized in the smallest possible space.

Abstract: The invention relates to a planar fuel cell system comprising at least two fuel cells which are electrically mounted in series by means of horizontally overlapping connecting lugs (8 and 8?, 18 and 18?) and/or strip conductors (40), and a polymer electrolyte membrane (3). According to the invention, the current path is guided around the polymer electrolyte membrane, the fuel cell system is embodied as an arrangement of two printed circuit boards, according to printed circuit board technique, and the current collectors and connecting lugs arc embodied as strip conductors of said printed circuit boards.

Abstract: Transactions within a process model are determined by grouping a set of individual process activities into a single transaction. This effectively reduces the processing overhead, and, therefore, improves the overall throughput and latency of the execution of the process model. The transaction is determined by performing an optimization procedure that takes into account the structure of the process model as well as various properties of the single process activities of the process model. Analysis of the properties of the process activities as well as application of the optimization procedure is performed dynamically during execution of the process model by a workflow engine.

Abstract: The present invention relates to a micro cell system (1) with a membrane electrode assembly (MEA) (2) which in each case is covered on the cathode-side and anode-side with a current collector foil (3, 4). The current collector foils in each case comprise at least one gas-permeable opening (5, 6). On at least one of the current collector foils (3, 4) on a side facing the MEA (2) there are arranged diffusion channels (7, 8) These replace e.g. porous or fleece-like gas diffusion layers and thus alone ensure the micro-diffusion of gas on the MEA (2) The diffusion channels for this are connected to the gas-permeable opening (5, 6) for leading through gas, and the webs (9, 10) of the diffusion channels are provided with an electrically conductive surface (11, 12) for contacting the MEA.

Abstract: This invention relates to a fuel cell system with a polyelectrolyte membrane fuel cell and a method by which the pressure inside the fuel cell can be regulated by means of the quantity of fuel introduced. This regulation is accomplished by means of pressure sensors which are controlled by means of an electronic control unit.

Abstract: A displacement machine operating according to the spiral principle has at least one parallel motion guide device provided to ensure a torsionally rigid relative movement of two displacement elements.

Abstract: In a displacement machine operating according to the spiral principle and having two displacement elements presenting respective axially interengaging sprial-shaped walls, and drive means connected between the elements to produce a relative translatory circular movement therebetween, an elastic suspension is provided to support at least one of the displacement elements for permitting elastic movement between the elements in a plane perpendicular to the axis of translatory circular movement.In such a displacement machine, whether or not the elastic suspension is provided, the walls of the displacement elements are preferably made, at least at the surfaces contacting one another, of respectively different materials presenting a low mutual coefficient of friction.