Cross-cutting is a technique which conveys an undeniable spatial discontinuity. The core-mantle boundary is a strong thermal (temperature) discontinuity. Differences of constitution are explained by quantum mechanics, which postulates discontinuity of physical processes. Modern SDRAM chips exemplify the problem of electrical impedance discontinuity. An impedance step is an example of a device introducing a discontinuity. The triaxial test can be used to determine the shear strength of a discontinuity. These are areas with relatively homogeneous morphometric properties, bounded by lines of discontinuity. These products also address issues such as data discontinuity and sparseness. However, this introduces a sharp discontinuity between atoms inside and atoms outside the radius. Its most noticeable feature is its extreme discontinuity, often from note to note. Some authors adopted these values in spite of the discontinuity. Under trade wind conditions, there is very often a pronounced moisture discontinuity between . The authors concluded that there is "discontinuity" between ancient locals and modern Basques. Discontinuum approach is useful for rock slopes controlled by discontinuity behaviour. The wing leading edge was fixed and had a dog-tooth discontinuity.