Hose coupling devices that securely connect an end of a hose to a fitting member using a retention mechanism operated by multi-threaded engagement of the fitting member with a collar member. The aircraft comprises a plurality of propellers mounted to wings. The system further includes a synchronizer coupled to the single-electron device and configured to cause the single-electron device to inject the single electron into the resonant tank circuit at a phase based on an extreme electrical characteristic output of the resonant tank circuit. The first trench and the floor isolation region electrically isolate a pocket of the first conductivity type from the substrate.