Carriers for use in the preparation of mixtures for inhalation powders intended for pulmonary administration of micronized drugs by means of a dry powder inhaler and the method for their preparation are described. These compounds have been isolated from the Indian ascidian Synoicum macroglossum. And the pinch roller is formed of synthetic resin, so that the pinch roller can be manufactured less costly and the durability of the same can be increased. A harness includes a center strap and may include side straps. The controller receives information indicative of the total length of the linear target. A combination of electrical devices operable to be electrically coupled to a common power source is virtually assembled, and empirically derived dynamic power requirements associated with each of the electrical devices are modeled.