Titlebook: Usability, Accessibility and Ambient Assisted Living; Alexandra Queirós,Nelson Pacheco da Rocha Book 2018 Springer Nature Switzerland AG 2

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Ambient Assisted Living: Systems Characterization,cipation. The existence of an international classification implies the existence of concepts able to provide a standardized language to all relevant stakeholders in the development and application of AAL solutions..The next sections will present the type of AAL solutions developed in the past years,

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Usability, Accessibility and Ambient Assisted Living

AVID

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Alexandra Queirós,Nelson Pacheco da Rocha explanations at this stage, the statement is made that semiconductors have an . while semimetals and metals have no such gap. However, very impure semiconductors show a more or less metallic behavior and with many substances, the art of purification by, e.g., zone refining [1.1, 2] is not so far ad

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Anabela G. Silvarange impact on the tech- nology. The impact of solid-state devices capable of handling appreciable power levels has yet to be fully realized. Since it first became available in late 1957, the SCR or silicon-controlled rec- tifier (also called the reverse blocking triode thyristor) has become the mo