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  2. Attention deficit hyperactivity disorder - Wikipedia

    en.wikipedia.org/wiki/Attention_deficit...

    Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.

  3. Hydrochloric acid - Wikipedia

    en.wikipedia.org/wiki/Hydrochloric_acid

    Hydrochloric acid has been used for dissolving calcium carbonate, e.g. such things as de-scaling kettles and for cleaning mortar off brickwork. When used on brickwork the reaction with the mortar only continues until the acid has all been converted, producing calcium chloride , carbon dioxide , and water:

  4. List of abbreviations used in medical prescriptions - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_used...

    This is a list of abbreviations used in medical prescriptions, including hospital orders (the patient-directed part of which is referred to as sig codes). This list does not include abbreviations for pharmaceuticals or drug name suffixes such as CD, CR, ER, XT (See Time release technology § List of abbreviations for those).

  5. Manchester code - Wikipedia

    en.wikipedia.org/wiki/Manchester_code

    Manchester coding is a special case of binary phase-shift keying (BPSK), where the data controls the phase of a square wave carrier whose frequency is the data rate. . Manchester code ensures frequent line voltage transitions, directly proportional to the clock rate; this helps clock

  6. Raised-cosine filter - Wikipedia

    en.wikipedia.org/wiki/Raised-cosine_filter

    The raised-cosine filter is a filter frequently used for pulse-shaping in digital modulation due to its ability to minimise intersymbol interference (ISI). Its name stems from the fact that the non-zero portion of the frequency spectrum of its simplest form (=) is a cosine function, 'raised' up to sit above the (horizontal) axis.

  7. Betelgeuse - Wikipedia

    en.wikipedia.org/wiki/Betelgeuse

    A typical type II-P supernova emits 2 × 10 46 J of neutrinos and produces an explosion with a kinetic energy of 2 × 10 44 J. As seen from Earth, Betelgeuse as a type IIP supernova would have a peak apparent magnitude somewhere in the range −8 to −12. [ 180 ]

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