1 These thio relaxers have a gentler action than other relaxer chemicals, so are a popular option when you want effective straightening with a lower risk of damage to the hair. 2  Japanese straightening systems use thio based relaxers.ons. 1  As the name suggests, this technique relaxes hair rather then leaving it poker straight, so if you want absolute stick straight and frizz-free hair, this method may not be for you. 2  As with every chemical process, the ever present risk of damage is there.
Types of Optical Illusions. There are currently three types of optical illusions: literal illusions, cognitive illusions, and physiological illusions. Each of these illusions trick our brain into misunderstanding what we see in various ways. A cognitive illusion happens when the brain perceives an object based on prior knowledge or assumptions.
Artifact types include reflections that are: not real, not seen on the image, not of the correct shape or size, not in correct position, not of correct brightness. Artifacts result from: violation of assumptions, equipment malfunctions or poor design, the physics of ultrasound, operator error. Six Assumptions of Imaging Systems.