Embodiments of the present invention provide a collaborative visualization system, which integrates motion capture and virtual reality, along with kinematics and computer-aided design, for the purpose of, for example, virtual training on a task. In order to optimize accommodation, two roof elements, which are separable on a median longitudinal plane of the body, are fixed in position, superposed as a first roof element and as a second roof element, into the receptacles of the stowage space using holding devices. The characteristic determining device also includes a communication system for transmitting a communication including data indicative of the determined concentration of the analyte in the user, and the infusion device includes a communication system for receiving the communication from the characteristic determining device. The multi-layered diffusion barrier is formed on a surface of the metal line forming region defined in the insulation layer.