  In this work we will show how the back-reaction can be treated as a quantum
correction. The novel semi-classical approach presented here consists in the
introduction of adequate quantum corrections into the r-t sector of the black
hole metric. Thus, we will obtain corrected values for the temperature, entropy
and emission rate, which at leading order coincide with the results in the
tunneling frame. We have also applied this technique to the Little String
Theory. Interestingly, we have found similar results for the entropy as using
string one-loop calculations.
