1. Department of Computer Science and Engineering (DISI), Universita degli Studi di Bologna Dipartimento di Informatica Scienza e Ingegneria, 166478 Bologna, Bologna, Italy, 40136 (e-mail: m.poggi@unibo.it)
2. Department of Computer Science and Engineering, Yonsei University, Seoul, Seodaemun-Gu, Korea (the Republic of), (e-mail: seungryong_kim@korea.ac.kr)
3. Computer Science and Engineering, Universita degli Studi di Bologna Dipartimento di Informatica Scienza e Ingegneria, 166478 Bologna, Italy, Italy, (e-mail: fabio.tosi5@unibo.it)
4. School of Electrical and Electronic Engineering, Korea University, 34973 Seongbuk-gu, Seoul, Korea (the Republic of), (e-mail: kso428@yonsei.ac.kr)
5. Department of Computer Science and Engineering (DISI), Universita degli Studi di Bologna Dipartimento di Informatica Scienza e Ingegneria, 166478 Bologna, Bologna, Italy, (e-mail: filippo.aleotti2@unibo.it)
6. the Department of Computer Science and Engineering, Ewha Womans University, 26717 Seoul, Seoul, Korea (the Republic of), 03760 (e-mail: dbmin@ewha.ac.kr)
7. School of Electrical and Electronic Engineering, Yonsei University, Seoul, Seodaenum-Gu, Korea (the Republic of), (e-mail: khsohn@yonsei.ac.kr)
8. Department of Computer Science and Engineering, University of Bologna, Bologna, -- Please Select (only U.S. / Can / Aus), Italy, 40136 (e-mail: stefano.mattoccia@unibo.it)