A holster provides a carrier for removable storing a portable electronic device, such as a cellular phone, PDA or MP3 player, and a fastener for securing the carrier to the user’s clothing or bag. The present invention provides methods of identifying agents that modulate bone formation and adipogenesis. In order to eliminate the ONU failure of the above problem, prior to transmission of the downstream signal, a downstream signal transmission schedule is notified to all of the ONUs. The discharge position is effective to discharge the contents of the auxiliary receptacle into the primary receptacle. Such composition may be useful in power transmissions to provide improved anti-shudder performance andor improved friction durability. The present invention prevents a Pinocchio defect that is a fundamental problem caused by the chemical mechanical polishing process and simplifies a subsequent cleaning process performed according to the particles.