The nature of sound is, nowadays, well known and understood so that sound could be synthetically described like the propagation of vibration in elastic media.Sound waves propagate as longitudinal wa……続きを見る
The basic principles of the phenomenon "erection" have been known since the pioneering work of Kolliker, Eckhard and Langley in the nineteenth century. Nonetheless, under the influence of Freud, ere……続きを見る
