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  2. Surgical lighting - Wikipedia

    en.wikipedia.org/wiki/Surgical_lighting

    Lux: The central illuminance should be between 160,000 and 40,000 lux. Light field diameter: The D50 diameter should be at least 50% of D10. Colour rendition: For the purpose of distinguishing true tissue colour in a cavity, the colour rendering index (Ra) should be between 85 and 100.

  3. Standard illuminant - Wikipedia

    en.wikipedia.org/wiki/Standard_illuminant

    For example, D50 has a CCT of 5003 K ("horizon" light), while D65 has a CCT of 6504 K (noon light). This is because the value of the constants in Planck's law have been slightly changed since the definition of these canonical illuminants, whose SPDs are based on the original values in Planck's law. [1]

  4. TV Parental Guidelines - Wikipedia

    en.wikipedia.org/wiki/TV_Parental_Guidelines

    For the first 15 seconds of every rated program lasting a half-hour or less, a large rating icon appears in the upper-left hand corner of the screen; previously this had a common design using a universal icon (a square accompanied by rating text rendered in Franklin Gothic type until August 1997 and Helvetica thereafter), but now often goes ...

  5. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    The closer this value is to 1.0, the better the data fit to a hyperplane representing the relationship between the response variable and a set of covariate variables. A value equal to 1.0 indicates all data fit perfectly within the hyperplane. λ: Gas mean free path (cm) D 50: Mass-median-diameter (MMD). The log-normal distribution mass median ...

  6. Mastercard credit card benefits: What is the difference ... - AOL

    www.aol.com/finance/mastercard-credit-card...

    While the differences between networks like Mastercard and Visa tend to be minimal, each network has a slightly different host of benefits. Mastercard credit card benefits range from basic ...

  7. D50 - Wikipedia

    en.wikipedia.org/wiki/D50

    D50, the mass-median-diameter in particle-size distribution measurements, considered to be the average particle size by mass D50 (film) , working title for a Tamil-language film D50 (radiotherapy) , the half maximal inhibitory dose, representing the dose of light or ionising radiation that is required for 50% inactivation of a tumor cell population

  8. AOL Plans - AOL Help

    help.aol.com/articles/aol-advantage-plans

    Tech Plus by AOL will provide around-the-clock tech support for all your devices coupled with computer and digital data protection services. • Tech Plus by AOL - Platinum - Tech Plus Platinum includes top of the line products to help protect your identity, personal data and devices, so that you have more control over your digital life.

  9. NEMA enclosure types - Wikipedia

    en.wikipedia.org/wiki/NEMA_enclosure_types

    Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size.