A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions. On Nov. 18, 1929, a magnitude 7.4 Mw earthquake occurred. south of Newfoundland along the southern edge of the Grand Banks, Canada. This illustration, called a Tsunami Time Travel Map, shows the arrival times of tsunami waves.
DATEM (diacetyl tartaric acid ester of mono-and diglycerides, also E472e) is an emulsifier primarily used in baking to create a strong gluten network in dough.n the USA, DATEM is generally recognized as safe by the Food and Drug Administration (FDA) as specified in the Code of Federal Regulations (21CFR184.1101). DATEM is approved by the European Food Safety Authority for use as food additive with the E number E472e.
IEEE 802.11e-2005 or 802.11e is an approved amendment to the IEEE 802.11 standard that defines a set of quality of service (QoS) enhancements for wireless LAN applications through modifications to the Media Access Control (MAC) layer.he 802.11e enhances the DCF and the PCF, through a new coordination function: the hybrid coordination function (HCF). Within the HCF, there are two methods of channel access, similar to those defined in the legacy 802.11 MAC: HCF Controlled Channel Access (HCCA) and Enhanced Distributed Channel Access (EDCA).