Sonja is a fictional character from the Underworld series of films. This character is the daughter of the vampire elder Viktor, introduced by flashback, in Underworld. Red Sonja, the She-Devil with a Sword, is a fictional character who first appeared in Conan the Barbarian #23 (Marvel Comics).
tetralogy (plural tetralogies) 1  A set of four works of art that are connected, and that can be seen either as a single work or as four individual works. They are commonly found in literature, film, or video games. ( 2 medicine) A combination of four symptoms.
World Go 'Round. Tribology, the science and technology of how surfaces in motion interact and the effect upon friction, lubrication, and wear, is crucial to making many of the things we depend upon work, from shoes that don't slip to the brakes in every form of transport.nlike tribophysics, the term tribology better suited the interdisciplinary nature of the science, which involves chemistry, physics, materials science, mechanical engineering, and increasingly, biology.