All Matrix cushions incorporate a Intelli-GelÂ® core, a dry polymer gel core that provides a unique combination of skin protection, support, and comfort. The Intelli-GelÂ® core is an ideal support surface for wheelchair cushions that provides a superior combination of performance, simplicity, and durability.ll Matrix cushions incorporate a Intelli-GelÂ® core, a dry polymer gel core that provides a unique combination of skin protection, support, and comfort. Often these wheelchair seating issues are associated with conditions such as: 1  Parkinsonâs disease. 2  Alzheimerâs disease. 3  Stroke (or other CVA). 4  Multiple Sclerosis.
Kenneth and Mamie Clark decided to try to improve social services for troubled youth in Harlem, as there were virtually no mental-health services in the community. Kenneth Clark was then an assistant professor at the City College of New York and Mamie Clark was a psychological consultant doing psychological testing at the Riverdale Children's Association.
Mamie Clark passed in 1983 at age 66, leaving behind two children and Kenneth Clark, who later passed in 2005 at age 91 (Butler, 2009). Both made significant contributions to the field of psychology and to the social movement of their time. References. Martin, J. (1994). Clark, Kenneth B. 1914â. Contemporary Black Biography. Retrieved Jan. 25, 2012. Butler, S. (2009). Mamie Katherine Phipps Clark (1917â1983). The Encyclopedia of Arkansas History & Culture. Retrieved Jan. 25, 2012.