Ferroelectric memory element having an MFIS structure including a silicon semiconductor substrate and an insulating film arranged above the silicon semiconductor substrate. The object of the present invention is to provide the multi-direction wind power generation apparatus that can generate electricity against the wind blowing from various directions, enhance the efficiency of electric generator by lessening the wind resistance maximally, and increase the solidity of the apparatus by establishing separate supporters for supporting the upperlower support frames. Some embodiments of the heparin binding polymers can be employed to bind to heparin for methods such as separating, purifying, removing, andor isolating heparin and heparin like molecules. The rigid upper and lower frames are secured to the leg using a plurality of straps. The digital audio device further includes a digital to analog converter connected to the network interface converting the digital audio signal to an analog audio signal, and an amplifier connected to the DA converter and amplifying the analog audio signal from the DA converter.