Abstract: The invention relates to a device (01) for additively manufacturing an, in particular rotationally symmetric, component (02), said device (01) having a material application unit (03) which is movable along at least two axes and which has an extruder (04) and a nozzle (05) for applying a material strand (06), a rotary head (07) having a compressor (08) for compressing a material strand (06) and having a heating device (09) for heating at least one material application area (10) being disposed on the material application unit (03), the rotary head (07) being rotatable around the nozzle (05), and a control device (11) being comprised which is configured to control at least the rotary head (07) and the compressor (08) and the heating device (09).

Abstract: A differential protection device monitors a first object to be protected in an electrical energy supply network. The differential protection device has a measuring unit configured to acquire measurement values at one end of the first object to be protected, a communication unit configured to exchange measurement values with a differential protection device arranged at another end of the first object to be protected, the communication unit has a physical interface for transmitting and receiving the measurement values, and an evaluation unit configured to form a differential value and to generate a fault signal indicating a fault with regard to the first object to be protected if the differential value exceeds a predefined threshold value. Ideally, the differential protection device is configured to monitor further objects to be protected and to exchange respective further measurement values with regard to each further object to be protected.

Abstract: A differential protection method for monitoring a line of a power grid. Current phasor measured values are captured at the ends of the line and transmitted to an evaluation device which is used to form a differential current value with current phasor measured values temporally allocated to one another. Time delay information indicating the time delay between local timers of the measuring devices is used for the temporal allocation of the current phasor measured values captured at different ends, and a fault signal indicating a fault affecting the line is generated if the differential current value exceeds a predefined threshold value. The reliability of the time synchronization is further increased by forming a quotient of the current phasor measured values to form an asymmetry variable, that is used to check a transit time difference of messages transmitted via the communication connection in different directions.

Abstract: A differential protection device monitors a first object to be protected in an electrical energy supply network. The differential protection device has a measuring unit configured to acquire measurement values at one end of the first object to be protected, a communication unit configured to exchange measurement values with a differential protection device arranged at another end of the first object to be protected, the communication unit has a physical interface for transmitting and receiving the measurement values, and an evaluation unit configured to form a differential value and to generate a fault signal indicating a fault with regard to the first object to be protected if the differential value exceeds a predefined threshold value. Ideally, the differential protection device is configured to monitor further objects to be protected and to exchange respective further measurement values with regard to each further object to be protected.

Abstract: The present invention relates to a multi-ion sensor (1) for measuring ions in aqueous systems comprising a flexible or semi-flexible substrate (11), a reference electrode (13) applied to the substrate (11), at least three working electrodes (15a, 15b, 15c) applied to the substrate (11), wherein the substrate (11), the reference electrode (13) and the working electrodes (15a, 15b, 15c) form an ion-selective sensor unit (101), a connection device (17) for the ion-selective sensor unit (101) and a sensor housing (19) which accommodates an assembly of ion-selective sensor unit (101) and connection device (17), wherein the reference electrode (13) has dimensions of max. 4 mm×4 mm×4 mm. The present invention is furthermore directed to a flow measuring cell (3) for measuring ions in aqueous systems as well as to a respective method for measuring ions in aqueous systems and a system for measuring ions in aqueous systems and for adjusting the ion contents in the aqueous systems.

Abstract: A differential protection method for monitoring a line of a power grid. Current phasor measured values are captured at the ends of the line and transmitted to an evaluation device which is used to form a differential current value with current phasor measured values temporally allocated to one another. Time delay information indicating the time delay between local timers of the measuring devices is used for the temporal allocation of the current phasor measured values captured at different ends, and a fault signal indicating a fault affecting the line is generated if the differential current value exceeds a predefined threshold value. The reliability of the time synchronization is further increased by forming a quotient of the current phasor measured values to form an asymmetry variable, that is used to check a transit time difference of messages transmitted via the communication connection in different directions.

Abstract: Vertical cavity semiconductor optical amplifiers for various photonic devices including all optical logic gate devices and oscillators, where such devices can be implemented to achieve various advantages, including Boolean inversion at high speeds, low power, workable noise margins for cascadability because of input output isolation, and easy of integration in large arrays.

Abstract: Vertical cavity semiconductor optical amplifiers for various photonic devices including all optical logic gate devices and oscillators, where such devices can be implemented to achieve various advantages, including Boolean inversion at high speeds, low power, workable noise margins for cascadability because of input output isolation, and easy of integration in large arrays.