ï¼For a roughness profileï¼. This expresses the biquadratic mean of Z(x) in a sampling length rendered dimensionless as the biquadratic of the root mean squared height Rq. This means the kurtosis which is a yardstick for the sharpness of a surface, and expresses the pointing (sharpness) of the height distribution.
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African National Congress. African National Congress (ANC), the oldest black (now multiracial) political organization in South Africa; founded in 1912. Prominent in its opposition to apartheid, the organization began as a nonviolent civil-rights group. Year in Review, 2008 - An overview of the turmoil within South Africa's ruling party in 2008, including Thabo Mbeki's resignation as president of South Africa, his rivalry with Jacob Zuma, and the future of the African National Congress.|2008 news of the world from Afghanistan to Zimbabwe.