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During the Vietnam War, the University of Civil Engineering was evacuated to Huong Canh, Vinh Phuc province. After peace was restored, in 1982, the school began planning to move back to Hanoi. At the end of 1983, the school officially moved back to Hanoi but was dispersed in four different locations: Co Nhue, Phuc Xa, Bach Khoa and Dong Tam.
For real non-zero values of x, the exponential integral Ei(x) is defined as = =. The Risch algorithm shows that Ei is not an elementary function.The definition above can be used for positive values of x, but the integral has to be understood in terms of the Cauchy principal value due to the singularity of the integrand at zero.
The strain hardening exponent (also called the strain hardening index), usually denoted , is a measured parameter that quantifies the ability of a material to become stronger due to strain hardening.
Exponential backoff algorithms can be used to avoid network collisions. In a point-to-multipoint or multiplexed network, multiple senders communicate over a single shared channel.