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  2. Air Pollution Index - Wikipedia

    en.wikipedia.org/wiki/Air_Pollution_Index

    The air quality in Malaysia is reported as the API (Air Pollutant Index) or in Malay as IPU (Indeks Pencemaran Udara). Four of the index's pollutant components (i.e., carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide) are reported in ppmv but PM 2.5 particulate matter is reported in μg/m 3.

  3. File:Ilovepdf.svg - Wikipedia

    en.wikipedia.org/wiki/File:Ilovepdf.svg

    This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

  4. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    There is a free email subscription service for New York inhabitants – AirNYC. [54] Subscribers get notifications about the changes in the AQI values for the selected location (e.g. home address), based on air quality conditions. A detailed map containing current AQI levels and a two-day AQI forecast is available at the Aerostate web site. [55]

  5. JPEG File Interchange Format - Wikipedia

    en.wikipedia.org/wiki/JPEG_File_Interchange_Format

    The JPEG standard used for the compression coding in JFIF files does not define which color encoding is to be used for images. JFIF defines the color model to be used: either Y for greyscale, or YCbCr derived from RGB color primaries as defined in CCIR 601 (now known as Rec. ITU-R BT.601), except with a different "full range" scaling of the Y ...

  6. Refractive index - Wikipedia

    en.wikipedia.org/wiki/Refractive_index

    A ray of light being refracted through a glass slab Refraction of a light ray. In optics, the refractive index (or refraction index) of an optical medium is the ratio of the apparent speed of light in the air or vacuum to the speed in the medium.

  7. Wobbe index - Wikipedia

    en.wikipedia.org/wiki/Wobbe_index

    The Wobbe index is expressed in MJ/Nm³ (where 'Nm³' indicates'm³ in Normal conditions), or sometimes in BTU/scf.In the case of natural gas (molar mass 17 g/mol), the typical heating value is around 39 MJ/Nm³ (1,050 BTU/scf) and the specific gravity is approximately 0.59, giving a typical Wobbe index of 51 MJ/Nm³ (1,367 BTU/scf).

  8. Henley Passport Index - Wikipedia

    en.wikipedia.org/wiki/Henley_Passport_Index

    The Henley Passport Index is a global ranking of countries according to the travel freedom allowed by those countries' ordinary passports for their citizens. [3] It was launched in 2005 as Henley & Partners Visa Restrictions Index [4] and was updated to Henley Passport Index in January 2018.

  9. Clear-air turbulence - Wikipedia

    en.wikipedia.org/wiki/Clear-air_turbulence

    In meteorology, clear-air turbulence (CAT) is the turbulent movement of air masses in the absence of any visual clues such as clouds, and is caused when bodies of air moving at widely different speeds meet.