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  2. Technetium-99m generator - Wikipedia

    en.wikipedia.org/wiki/Technetium-99m_generator

    The generator is washed of 99 Tc and 99m Tc at the end of the manufacturing process of the generator, but the ratio of 99 Tc to 99m Tc then builds up again during transport or any other period when the generator is left unused. The first few elutions will have reduced effectiveness because of this high ratio.

  3. Gaza humanitarian crisis (2023–present) - Wikipedia

    en.wikipedia.org/wiki/Gaza_humanitarian_crisis...

    The Gaza Strip is experiencing a humanitarian crisis as a result of the Israel–Hamas war. [1] [2] The crisis includes both an impending famine and a healthcare collapse.At the start of the war, Israel tightened its blockade on the Gaza Strip, which has resulted in significant shortages of fuel, food, medication, water, and essential medical supplies.

  4. 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.

  5. Kamov Ka-50 - Wikipedia

    en.wikipedia.org/wiki/Kamov_Ka-50

    The Kamov Ka-50 "Black Shark" (Russian: Чёрная акула, romanized: Chyornaya akula, English: kitefin shark), NATO reporting name Hokum A, is a Soviet/Russian single-seat attack helicopter with the distinctive coaxial rotor system of the Kamov design bureau.

  6. 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

  7. Median lethal dose - Wikipedia

    en.wikipedia.org/wiki/Median_lethal_dose

    In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.