The present application provides a method for producing an beta-lactone product. A start of the first frame from the first and second user nodes occurs simultaneously at the hub. The invention accesses a data repository via a data connection, displays the data from the data repository, and allows the displayed data to be characterized as scheduling data, statistical data, action items, current status, and listing of individuals. The system is pre-calibrated during manufacture without complicated or multi-step calibration or recalibration procedures during application. As a result, with the illumination device including the light source and the light guide, it is possible to achieve an illumination device with a higher light use efficiency and higher luminance homogeneity. A semiconductor memory device with this pad arrangement is accordingly adaptable to various types of packages.