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  2. Pulse generator - Wikipedia

    en.wikipedia.org/wiki/Pulse_generator

    For example, the pulse repetition rate and duration may be digitally controlled but the pulse amplitude and rise and fall times may be determined by analog circuitry in the output stage of the pulse generator. With correct adjustment, pulse generators can also produce a 50% duty cycle square wave. Pulse generators are generally single-channel ...

  3. Title 50 of the United States Code - Wikipedia

    en.wikipedia.org/wiki/Title_50_of_the_United...

    Title 50 of the United States Code outlines the role of War and National Defense in the United States Code. Chapter 1: Council of National Defense; Chapter 2: Board of Ordnance and Fortification (repealed) Chapter 3: Alien Enemies; Chapter 4: Espionage (repealed/transferred)

  4. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  5. Savoy Hotel - Wikipedia

    en.wikipedia.org/wiki/Savoy_Hotel

    The hotel has two well-known restaurants: the Grill Room (usually known as the Savoy Grill), on the north side of the building, with its entrance off the Strand, and the Savoy Restaurant (formerly known as the River Restaurant, now named Kaspars), on the south side, overlooking the River Thames. The latter has long been famous for its inventive ...

  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. Royal Observer Corps - Wikipedia

    en.wikipedia.org/wiki/Royal_Observer_Corps

    The Royal Observer Corps (ROC) was a civil defence organisation intended for the visual detection, identification, tracking and reporting of aircraft over Great Britain.It operated in the United Kingdom between 29 October 1925 and 31 December 1995, when the Corps' civilian volunteers were stood down (ROC headquarters staff at RAF Bentley Priory stood down on 31 March 1996).