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.
Alexander G. Clark was an African-American businessman and activist who served as United States Ambassador to Liberia in 1890-1891, where he died in office. Clark is notable for suing in 1868 to gain admission for his daughter to attend a local public school, gaining a constitutional ruling for integration from the Iowa state supreme court 86 years before the United States Supreme Court decision of Brown v. Board of Education. That year he also had gained the right for African Americans in Iowa