Hardness of dislocations, a particular metal's hardness can be controlled. Although seemingly counter-intuitive, as the density of dislocations increases, there are more intersections created and consequently more anchor points. Similarly, as more interstitial atoms are added, more pinning points that impede the movements of dislocations are formed. As a result, the more anchor points added, the harder the material will become. Hardness Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. Some materials (e.g. metals) are harder than others (e.g. plastics, wood). Macroscopic hardness is generally characterized by strong intermolecular bonds, but
Ahmed Janka Nabay Ahmed Janka Nabay Ahmed Janka Nabay (January 5, 1964 – April 2, 2018) was a Sierra Leonean musician and a major figure in Bubu Music, a traditionally Temne music which is played by up to 20 musicians blowing into bamboo pipes of different sizes. He first earned attention after performing for an audition of SuperSound. Janka Nabay recorded his album in Forensic Studios in Freetown during the Sierra Leonean Civil War. Since moving to Washington, D.C. in 2003, Janka Nabay has continued to play bubu music, including a performance at the CMJ College Music Marathon in New York in 2009