Optical disc of light. An early optical disc system existed in 1935, named . An early analog optical disc used for video recording was invented by David Paul Gregg in 1958 and patented in the US in 1961 and 1969. This form of optical disc was a very early form of the DVD (). It is of special interest that , filed 1989, issued 1990, generated royalty income for Pioneer Corporation's DVA until 2007 —then encompassing the CD, DVD, and Blu-ray systems. In the early 1960s, the Music Corporation of America bought Gregg's patents and his company, Gauss Electrophysics. American inventor James
Capacity to be alone Capacity to be alone Capacity to be alone is a developmentally acquired ability, considered by object relations theory to be a key to creative living. Julia Kristeva sees it as central to an authentic inner life, as well as to creative sublimations in life and art. D. W. Winnicott in his article of that name (1958/64) highlighted the importance of the capacity to be alone, distinguishing it from both withdrawal and loneliness, and seeing it as derived from an internalisation of the non-intrusive background presence of a mothering figure. Winnicott in his writings always stressed the importance of the baby