A method and apparatus for exercising internal and external oblique muscles utilizes lateral forces generated by the feet and maintain the upper body in a fixed position to facilitate exercise of the oblique muscles. To facilitate switching at an electronic edge node, data bursts are organized into data segments of equal size. The system comprises: a sensor; an movement detection module connected to the sensor providing an orientation signal registering a notable signal from the sensor; and a graphical user interface adjustment module to determine a new layout for the elements being displayed on the display utilizing orientation data provided by the movement detection module. A stream of matter enriched with the oxidizing agent is fed to the reaction zone in which cyanides and other pollutants inhibiting the nitrification are biodegraded.