DVD CDs (0.74 µm for DVD versus 1.6 µm for CD), accounting in part for DVD's increased storage capacity. In comparison, Blu-ray Disc, the successor to the DVD format, uses a wavelength of 405 nm (violet), and one dual-layer disc has a 50 GB storage capacity. Read and write speeds for the first DVD drives and players were 1,385 kB/s (1,353 KiB/s); this speed is usually called "1×". More recent models, at 18× or 20×, have 18 or 20 times that speed. Note that for CD drives, 1× means 153.6 kB/s (150 KiB/s), about one-ninth as swift. DVD-Video is a standard
Capacity to be alone being allowed "just to lie back and float", and of the "opportunity that the baby has to experience separation without separation". Out of those early experiences emerges the capacity to be alone in (or out of) the presence of others - something which might have to be re-acquired later in life through psychotherapy. A later strand of analysis, drawing on the work on listening of Theodore Reik, has emphasised the importance of the "analyst"'s capacity to be alone in the analytic situation - to remain centred in themselves in the face of the projections and resistances of the patient. André