**Direselign Addis Tadesse, Chuan-Ming Liu \* and Van-Dai Ta**

Department of Computer Science and Information Engineering, National Taipei University of Technology (Taipei Tech), Taipei 106, Taiwan; t106999405@ntut.edu.tw (D.A.T.); t104999002@ntut.edu.tw (V.-D.T.)

**\*** Correspondence: cmliu@csie.ntut.edu.tw; Tel.: +886-2-27712171 (ext. 4251)

Received: 16 February 2020; Accepted: 21 June 2020; Published: 28 June 2020
