There are five basic gasifier technologies currently in commercial use: â 1 Down Draftâ Fixed Bed. â 2 Up Draftâ Fixed Bed. 3  Fluidized Bed Reactor. 4  Entrained Flow. 5  Plasma.
2 B. Brief History of HMOs A health maintenance organization is defined as âan organization that combines the provision of health insurance and the delivery of health care services.â (Given 1994) Early HMOs and HMO-like institutions developed in the 1930s.
From the 1940s into the 1970s, the majority of HMO enrollees belonged to the Kaiser system. Industrialist Henry J. Kaiser, working with Dr. Sidney Garfield, offered prepaid health care to the workers who built the Grand Coulee Dam in 1938.