Abstract: The invention relates to a device (100) for an additive manufacture. The device (100) comprises a laser device (110) for machining material using a laser beam (112), said laser device (110) being designed to deflect the laser beam (112) onto a machining region of a workpiece (10); at least one supply device (130) for a supply material, said supply device being designed to supply the supply material to the machining region; and an interferometer (140) which is designed to measure a distance to the workpiece (10) by means of an optical measuring beam (142).

Abstract: The invention relates to a device (100) for an additive manufacture. The device (100) comprises a laser device (110) for machining material using a laser beam (112), said laser device (110) being designed to deflect the laser beam (112) onto a machining region of a workpiece (10); at least one supply device (130) for a supply material, said supply device being designed to supply the supply material to the machining region; and an interferometer (140) which is designed to measure a distance to the workpiece (10) by means of an optical measuring beam (142).

Abstract: A method for producing a workpiece, includes providing a substrate having a predetermined surface structure; coating the surface structure with a coating material, wherein the coating material is resistant to a production temperature of an additive production method; the additive production of a material for the workpiece on the coated surface structure using the additive production method such that the coated surface structure defines a base surface of the workpiece to be produced, and the detachment of the substrate. A workpiece is produced by the described method.

Abstract: An electrochemical sensor, used with a measuring medium, has a sensor head (1), a sensor chip (6, 606) with a sensitive region (632), a sensor body (2) with an end piece (3, 503), a sealing means (10, 510, 610) and a pressing element (18, 618). The sensor body is connected to the sensor head. The end piece is hollow with a closed end region and a measuring opening (4, 504) that allows the measuring medium to contact the sensitive region, which is inside the end piece during operation. The sealing means surrounds the measuring opening, other than the sensitive region, and seals the inside of the end piece from the measuring medium during operation. The pressing element biases the sensor chip against the sealing means and the edge of the measuring opening. The end piece has an integral, gap-free design in the region that contacts the measuring medium during operation.

Abstract: An electrochemical sensor, used with a measuring medium, has a sensor head (1), a sensor chip (6, 606) with a sensitive region (632), a sensor body (2) with an end piece (3, 503), a sealing means (10, 510, 610) and a pressing element (18, 618). The sensor body is connected to the sensor head. The end piece is hollow with a closed end region and a measuring opening (4, 504) that allows the measuring medium to contact the sensitive region, which is inside the end piece during operation. The sealing means surrounds the measuring opening, other than the sensitive region, and seals the inside of the end piece from the measuring medium during operation. The pressing element biases the sensor chip against the sealing means and the edge of the measuring opening. The end piece has an integral, gap-free design in the region that contacts the measuring medium during operation.

Abstract: A fuel cell, such as a polymer electrolyte fuel cell, includes an anode reactant supply plate, an anode current collector, a cathode reactant supply plate, and a cathode current collector. At least one of the anode reactant supply plate, the cathode reactant supply plate, the anode current collector and the cathode current collector is electrically separated into a number of segments, wherein each segment of at least a subgroup of segments is separately connected to an electronic drive and analysis circuitry which performs in parallel impedance measurement in a frequency range of 0.1 mHz to 50 kHz of the respective segments.

Abstract: A device to extract material of a material reservoir has at least one guide tube with internal space and with an inner wall surrounding the internal space; at least one sled that can implement a sled translation movement in the inner space along a longitudinal alignment of the guide tube; and at least one collection unit with collection surface to collect the material. The collection unit and the sled are coupled to one another such that the sled translation movement of the sled leads to a collection translation movement of the collection surface of the collection unit, and such that the collection surface can be inserted into the material reservoir and be withdrawn from the material reservoir. A rotation mechanism that is operated manually or automatically can be provided with which a wire, which acts as a collection device, can be displaced in vivo over a length of 1 mm to up to 2 cm within a venous cannula.

Abstract: A fuel cell, such as a polymer electrolyte fuel cell, includes an anode reactant supply plate, an anode current collector, a cathode reactant supply plate, and a cathode current collector. At least one of the anode reactant supply plate, the cathode reactant supply plate, the anode current collector and the cathode current collector is electrically separated into a number of segments, wherein each segment of at least a subgroup of segments is separately connected to an electronic drive and analysis circuitry which performs in parallel impedance measurement in a frequency range of 0.1 mHz to 50 kHz of the respective segments.

Abstract: A base for a lamp, in particular a high-pressure discharge lamp, has an accommodating area for electronic components of the lamp and a chamber for the purpose of accommodating at least one further electronic component, for example a transformer, an electrical contact element being arranged in the base and connecting a voltage output of the transformer to a power supply line of the lamp via a connecting region. The connecting region is electrically insulated from the accommodating area of the base by a contact cover.