Methods and devices to measure voltage margins of electromechanical devices are disclosed. A support assembly includes tubular upper and lower cylindrical sections. Also, the inverter control device and the regenerative resistor are affixed to the casing, in close contact therewith, in parts of the casing separated from each other with the mechanism part therebetween. Nanoparticles containing the inventive lipidoids and polynucleotides have been prepared and have been shown to be effective in delivering siRNA. Delay alignment is performed on a selectively received signal according to the frame synchronization state signal to implement lossless switching in a selective receiving process. The invention also relates to said pixel sensor element for use with an image intensifier or in an electron bombarded image sensor array device according to the invention.