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  2. Luxottica - Wikipedia

    en.wikipedia.org/wiki/Luxottica

    Luxottica. Luxottica Group S.p.A. is an Italian eyewear multinational corporation headquartered in Milan. As a vertically integrated company, Luxottica designs, manufactures, distributes, and retails its eyewear brands through its own subsidiaries. It is the largest eyewear company in the world. [5][6] It is, since October 2018, a subsidiary of ...

  3. Cathode-ray tube - Wikipedia

    en.wikipedia.org/wiki/Cathode-ray_tube

    A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [2] The images may represent electrical waveforms on an oscilloscope , a frame of video on an analog television set (TV), digital raster graphics on a computer monitor , or ...

  4. Regulation of electronic cigarettes - Wikipedia

    en.wikipedia.org/wiki/Regulation_of_electronic...

    [30] [31] In the US some states tax e-cigarettes as tobacco products, and some state and regional governments have broadened their indoor smoking bans to include e-cigarettes. [32] As of April 2017 [update] , 12 US states and 615 localities had prohibited the use of e-cigarettes in venues in which traditional cigarette smoking was prohibited ...

  5. CT scan - Wikipedia

    en.wikipedia.org/wiki/CT_scan

    A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. [2] The personnel that perform CT scans are called radiographers or radiology technologists. [3][4]

  6. Gray card - Wikipedia

    en.wikipedia.org/wiki/Gray_card

    A gray card is a flat object of a neutral-gray color that derives from a flat reflectance spectrum. A typical example is the Kodak R-27 set, which contains one 8 in × 10 in (20 cm × 25 cm) card and one 4 in × 5 in (10 cm × 13 cm) card, each with an 18% reflectance across the visible spectrum, and a white reverse side with a 90% reflectance.

  7. List of abbreviations used in medical prescriptions - Wikipedia

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

    Latin, "at one's pleasure"; as much as one desires; freely compare pro re nata, "as needed", which by convention includes an aspect of "up to some maximum". Similarly, compare s.o.s., q.l., and q.s. admov. admove admoveatur: apply [or] add add; let there be added ad us. ad usum: according to custom æq. æquales: equal agit. agita

  8. Where to shop today's best sales: 25% off an iPad, 20% off ...

    www.aol.com/where-to-shop-todays-best-sales-25...

    Le Creuset Signature Round Dutch Oven, 5.5 Quart. $336 $420 Save $84. Cook like Ina Garten this fall and winter with the queen's favorite 5.5-quart Dutch oven, now 20% off at Sur La Table. You can ...

  9. SMPTE color bars - Wikipedia

    en.wikipedia.org/wiki/SMPTE_color_bars

    The off-by-one errors (for example 254 instead of 255 and 1 instead of 0) happen because the 8 bit Y'PbPr values were used when decoding to R'G'B', if you use 10-bit Y'PbPr that does not happen. Y'PbPr (and Y'CbCr ) values of 75% (100/0/75/0) SMPTE ECR 1-1978 color bars (0.75 * 219 + 16 = 180) using BT.709-2 matrix coefficients as written in RP ...

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