An apparatus for gathering queue performance data includes an event conditioning logic unit that receives a queue enter signal, a queue exit signal, and a queue not empty signal from a queue. The hole injection layer is formed with a tungsten oxide thin film, and has, in an electronic state thereof, an occupied energy level 1. A base number is assigned to each of the selected peaks in the reference data trace, and a numerical peak file is created with information about the peak number and migration time. The email message is then tagged with an email tag to generate a tagged email message. The control unit arranged to receive the flux signal at an input terminal and, in response, provide a control signal based on the measurement signal at an output terminal for controlling an amplitude of the current or a force of a further device. The sliding door device includes an automatic locking mechanism that is interlocked with a closing operation of the sliding door, and locks the sliding door in a closed state, and a manual locking mechanism that locks the sliding door in the closed state by a manual operation.