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  2. Joint Service General Purpose Mask M-50/M-51 - Wikipedia

    en.wikipedia.org/wiki/Joint_Service_General...

    The M50 series mask entered service in December 2006. [3] [4] In July 2014, Avon Protection received a contract to supply 135,000 M50s for $33 million. [5] In March 2016, it was announced that 166,623 M50s were purchased by the Department of Defense (DOD) under a $42 million contract. [6]

  3. Sales taxes in the United States - Wikipedia

    en.wikipedia.org/wiki/Sales_taxes_in_the_United...

    The average effective sales tax for different income groups of the combined 50 States (2007). The effective tax shown is calculated using a microsimulation model based on the 1990 Public Use Microdata Sample of census records and statistical data from the Internal Revenue Service for undisclosed years.

  4. Television - Wikipedia

    en.wikipedia.org/wiki/Television

    The word television comes from Ancient Greek τῆλε (tele) 'far' and Latin visio 'sight'. The first documented usage of the term dates back to 1900, when the Russian scientist Constantin Perskyi used it in a paper that he presented in French at the first International Congress of Electricity, which ran from 18 to 25 August 1900 during the International World Fair in Paris.

  5. 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.

  6. Toyota Camry (XV50) - Wikipedia

    en.wikipedia.org/wiki/Toyota_Camry_(XV50)

    The Toyota Camry (XV50) is a mid-size car produced by Toyota from August 2011 to August 2020. Replacing the XV40 series, the XV50 represents the seventh generation of the Toyota Camry in all markets outside Japan, which follows a different generational lineage.

  7. Decline in insect populations - Wikipedia

    en.wikipedia.org/wiki/Decline_in_insect_populations

    [50] [51] A reanalysis published in 2017 suggested that, in 1989–2016, there had been a "seasonal decline of 76%, and mid-summer decline of 82%, in flying insect biomass over the 27 years of study". The decline was "apparent regardless of habitat type" and could not be explained by "changes in weather, land use, and habitat characteristics".