Abstract: A metal-organic coordination compound is formed of a divalent Europium cation, a macrocyclic organic ligand, and iodide anions in an amount to make the coordination compound electrically neutral, with the macrocyclic organic ligand comprising 16 to 23, preferably 18 to 20 ring atoms, with the exception of five specific macrocyclic organic ligands M1 to M5.

Abstract: Microprocessor-controlled adapter circuit for real-time controls, in particular for print hammer controls in line printers with revolving type carrier with two asynchronously driven FIFO buffers (FIRST IN, FIRST OUT). The first FIFO buffer contains time values (e.g., firing times for the print hammers) and the second FIFO buffer control information associated with these time values (e.g., print hammer address, control commands for the print hammer). By a request circuit (e.g., counters), the time values are successively read from the first FIFO buffer and fed to a gate circuit for switching the control information, associated with these time values, from the second FIFO buffer for controlling the output values.