1. School of Chemical and Process Engineering, Univ. of Leeds, Leeds, U.K..
2. School of Chemical and Process Engineering, Univ. of Leeds, Leeds, U.K.
3. OHB System AG, Munich, Germany
4. Southern-Kazakh State Univ., Shimkent, Kazakhstan
5. Dept. of Physics and Astronomy, College of Science, King Saud Univ., Riyadh, Saudi Arabia