The fractional Fourier transform can be optically defined through a phase-space coordinate rotation of the Wigner distribution function associated with the input signal. This operation can be achieved by performing three successive shearing processes, which are reduced to a free-space Fresnel diffraction originated by a scaled version of the input object illuminated with a spherical wave. This ...

770 J. Audio Eng. Soc., Vol. 64, No. 4, 2016 April Semantic audio is the relatively young field concerned with content-based management of digital audio recordings. The rapid evolution of digital audio technologies—see the ubiquity of data compression and streaming, the emergence of large audio libraries both online and offline, and recent developments in content-based audio retrieval—have sign...

I shall try to say a few words about two particular ways in which my own work has a certain relation to your work with heavy ions. My title is therefore quantum optics and heavy ion physics. Some of this work deals with a form of nuclear scattering theory. The approach I shall talk about is really a nuclear diffraction theory [1]. It grows directly out of the ancient Fraunhofer form of optical ...