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Polysomnographic studies of nocturnal sleep were performed on a 63-year-old women. Sleep-onset and sleep-maintenance insomnia dated back to a cerebral infarction at age 53, which resulted in bilateral cerebral injury. Two patterns of respiration were observed, and both were sleep-stage-dependent. Classic Cheyne-Stokes respiration predominated during(More)
The successful realization of the goal of Model-Based Systems Engineering (MBSE) practice, to contain all project information in models, is predicated on the ability of the system model to represent the information needs of a broad range of stakeholders such as the owners, acquirers, suppliers, maintainers, and users. The paper opens by discussing the(More)
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