A novel, one-way nut fastener including a nut body with a side wall that is internally threaded and lobes that extend from the side wall of the nut body. The sprinkler includes a first flow path that delivers water to a nozzle for irrigation and a second flow path that delivers water to a cavity between the riser assembly and the housing. The signal’s information bearing point is found at the point within the information period of the signal with the highest averaged energy. A semantically overloaded flag can be used to efficiently handle chained logical comparisons.