A light-emitting device includes four or more rows of element groups each having light-emitting elements arranged in a first direction, the element groups being arranged in parallel in a second direction different from the first direction. The specimen can in this case be brought into a plurality of rotational positions, at least one measurement result being determined in each of the rotational positions. The stator and the rotor expand radially along a direction from the air inlet to the air outlet. The location database is processed to determine skier behavior based upon the location event records. The second microelectronic element is arranged with the conductive member in a top and bottom position.