\(\left.\ \tau_{\text{rs}}=\left(1+K_{1}\right)\left(\frac{1}{r+R}\frac{\partial u}{\partial r}+k^{*}N+\frac{u}{r+R}\right)\right|_{r=0},\ \ \ \left.\ q_{m}=-k\left(\frac{\partial T}{\partial r}\right)\right|_{r=0},\) (17)