Optical disc composed of a phase change material, most often AgInSbTe, an alloy of silver, indium, antimony, and tellurium. Optical discs are most commonly used for storing music (e.g. for use in a CD player), video (e.g. for use in a Blu-ray player), or data and programs for personal computers (PC). The Optical Storage Technology Association (OSTA) promotes standardized optical storage formats. Although optical discs are more durable than earlier audio-visual and data storage formats, they are susceptible to environmental and daily-use damage. Libraries and archives enact optical media preservation procedures to ensure continued usability in the computer's optical disc drive or
Capacity to be alone Green saw the fertile interaction of reading/writing as rooted in the 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