Abstract: The invention relates to a method for producing at least one circuit part on a substrate (20). Said method comprises the following steps: at least one granulate (54), which contains an electric conductor and which has a predefined geometric distribution, is deposited on the substrate (20) and the granulate (54) is heated and forms a permanent connection with the substrate (20) and forms at least one circuit part on the substrate (20). The invention also relates to a circuit board comprising at least one substrate, on which at least one circuit part is arranged, and to a device for producing at least one circuit part on a substrate (20).

Abstract: A receiver tube (1) for a solar trough collector which focuses the solar radiation incident thereon towards a focal line includes an absorber tube (2) which in the mounted condition of the receiver tube (1) extends on the focal line of the trough collector and which is in the form of part of a flow path for a heat carrier medium, and a gas-tightly closed casing tube, in the internal space (8) of which the absorber tube extends, wherein the flow path for the heat carrier medium is passed outwardly through the wall of the casing tube in the end regions thereof.

Abstract: The invention concerns a device for reading and encrypting sensitive data which are to be transmitted by way of a remote transmission network (7) to a central server (9). Particularly secure data transmission can be ensured if the system includes a reading unit (2) for reading the data, an encryption unit (3) connected thereto for encryption of the data, and a computer (4) which is connected to the encryption unit and which receives the data already encrypted from the encryption unit (3) and sends the encrypted data by way of a network interface (11) and the remote transmission network (7) to the central server (9).

Abstract: The invention relates to a method for producing at least one circuit part on a substrate (20). Said method comprises the following steps: at least one granulate (54), which contains an electric conductor and which has a predefined geometric distribution, is deposited on the substrate (20) and the granulate (54) is heated and forms a permanent connection with the substrate (20) and forms at least one circuit part on the substrate (20). The invention also relates to a circuit board comprising at least one substrate, on which at least one circuit part is arranged, and to a device for producing at least one circuit part on a substrate (20).

Abstract: The invention concerns a device for reading and encrypting sensitive data which are to be transmitted by way of a remote transmission network (7) to a central server (9). Particularly secure data transmission can be ensured if the system includes a reading unit (2) for reading the data, an encryption unit (3) connected thereto for encryption of the data, and a computer (4) which is connected to the encryption unit and which receives the data already encrypted from the encryption unit (3) and sends the encrypted data by way of a network interface (11) and the remote transmission network (7) to the central server (9).