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  2. Sunglass Hut - Wikipedia

    en.wikipedia.org/wiki/Sunglass_Hut

    sunglasshut .com. Sunglass Hut is an international retailer of sunglasses and sunglass accessories founded in Miami, Florida, United States, in 1971. Sunglass Hut is part of the Italian-based Luxottica Group, the world’s largest eyewear company. As of December 31, 2008, the Luxottica Group operated 2,286 stores around the world, most of those ...

  3. Heat transfer - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer

    A hot, less-dense lower boundary layer sends plumes of hot material upwards, and cold material from the top moves downwards. Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy ( heat) between physical systems. Heat transfer is classified into various mechanisms ...

  4. Near-field radiative heat transfer - Wikipedia

    en.wikipedia.org/wiki/Near-field_radiative_heat...

    Near-field radiative heat transfer (NFRHT) is a branch of radiative heat transfer which deals with situations for which the objects and/or distances separating objects are comparable or smaller in scale or to the dominant wavelength of thermal radiation exchanging thermal energy. In this regime, the assumptions of geometrical optics inherent to ...

  5. Convection (heat transfer) - Wikipedia

    en.wikipedia.org/wiki/Convection_(Heat_transfer)

    A hot, less-dense material at the bottom moves upwards, and likewise, cold material from the top moves downwards. Convection (or convective heat transfer) is the transfer of heat from one place to another due to the movement of fluid. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined ...

  6. Heat transfer physics - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer_physics

    The macroscopic energy equation for infinitesimal volume used in heat transfer analysis is [6] = +, ˙, where q is heat flux vector, −ρc p (∂T/∂t) is temporal change of internal energy (ρ is density, c p is specific heat capacity at constant pressure, T is temperature and t is time), and ˙ is the energy conversion to and from thermal ...

  7. Luxottica - Wikipedia

    en.wikipedia.org/wiki/Luxottica

    Luxottica. Luxottica Group S.p.A. is an Italian eyewear conglomerate based in Milan. As a vertically integrated company, Luxottica designs, manufactures, distributes, and retails its eyewear brands all through its own subsidiaries. The company, presently organized as a subsidiary of EssilorLuxottica which formed when the Italian conglomerate ...

  8. Thermal radiation - Wikipedia

    en.wikipedia.org/wiki/Thermal_radiation

    Overview. Thermal radiation is the emission of electromagnetic waves from all matter that has a temperature greater than absolute zero. [ 5][ 2] Thermal radiation reflects the conversion of thermal energy into electromagnetic energy. Thermal energy is the kinetic energy of random movements of atoms and molecules in matter.

  9. The no-mess sunscreen applicator that's a parent's must-have ...

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