Goniochromatic luster pigments are based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere and which comprise at least one layer packet comprising. The security credentials or \u201croles\u201d describe which settings a particular configuration message has authority to modify or query. The present disclosure is directed to systems and methods that exploit this fact to efficiently provide for the coexistence of 10G-EPON and 1G-EPON over the same set of optical fibers in the upstream direction. The notification of the deletion event can be enabled by configuring a number of notification options maintained for each user profile by the digital playback device at a predefined time. The method includes administering to a warm-blooded animal in need of such treatment a dose of ketamine sufficient to alleviate symptoms associated with RLS.