A periodontist is a dentist who specializes in the prevention, diagnosis, and treatment of periodontal disease, and in the placement of dental implants. Periodontists are also experts in the treatment of oral inflammation.
Ground speed. Ground speed is the horizontal speed of an aircraft relative to the ground. An aircraft heading vertically would have a ground speed of zero. Information displayed to passengers through the entertainment system often gives the aircraft ground speed rather than airspeed.
G.fast is a new digital subscriber line (DSL) standard for local loops of under 500m, which targets performance of between 150Mbps and 1Gbps depending on distance from the distribution point, whether that be a fibre cabinet or a remote node.