A method for preparing particles to retain a charge such that the particles are rendered electrostatically or electrokinetically mobile. The apparatus includes a diagnostic monitor that allows patients to easily, quickly and reliably enter information about daily health activity. The apparatus further includes a shooting section that performs, in response to a single shooting instruction, shootings with correct exposures for the respective faces based on the correct exposure values for the respective faces calculated by the calculation section. An organic semiconductor device comprising an organic layer comprising the organic semiconductor material. The high voltage durability HEMT also comprises a III-nitride semiconductor body formed over the P type conductivity <111> silicon layer, the III-nitride semiconductor body forming a heterojunction of the HEMT.