Immediate treatment of heat stroke is body cooling; currently the preferred method of cooling is evaporation cooling by spraying the patient with cold water or covering them with cold water soaked sheets, and using fans to augment evaporative cooling.
Orthogonal Frequency Division Multiplexing or OFDM is a modulation format that is being used for many of the latest wireless and telecommunications standards. OFDM has been adopted in the Wi-Fi arena where the standards like 802.11a, 802.11n, 802.11ac and more.
Shortly afterward came multi-channel systems that used the 1550 nm region, where the fiber attenuation is lowest. Depending on their wavelength patterns, WDM systems are typically divided into coarse wavelength-division multiplexing (CWDM) and dense wavelength-division multiplexing (DWDM).