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Also , successful shiftworkers find time to enjoy moments of friendship and recreation with others . This course will look at the history of microkernel systems to provide an introduction and overview , and then focus our attention specifically on later , successful microkernels - - most notably the L4 nucleus and the EROS nucleus . Three years later , successful but weary of being a " one-man show , " he joined Morgan Stanley , the investment bank in New York . Moreover , successful systems will evolve , because their user 's needs ( and many other things ) will evolve ; therefore they should be designed from the beginning to support evolution . Traditionally , successful efforts to increase or sustain funding for HPC have depended upon the establishment of carefully-crafted coalitions of government agencies ( and their respective constituencies ) . Moreover , successful imitation frequently requires time compression with respect to acquiring infrastructure and applications capabilities . Moreover , successful efforts in one part of Africa will more easily replicated elsewhere in the continent , and progress towards , for example , generic drug production in one country can have an impact throughout Africa .