http://hdl.handle.net/2117/3092 2013-05-19T16:03:51Z http://hdl.handle.net/2117/19310 Title: Cloud virtual machine scheduling: modelling the cloud virtual machine instantiation Authors: Sotiriadis, S.; Bessis, N.; Xhafa Xhafa, Fatos; Antonopoulos, Nicos 2013-05-16T13:55:24Z http://hdl.handle.net/2117/19306 Title: Performance analysis of DSR and DYMO routing protocols for VANETs Authors: Spaho, Evjola; Ikeda, Makoto; Barolli, Leonard; Xhafa Xhafa, Fatos; Kolici, Vladi; Takizawa, Makoto 2013-05-16T13:36:45Z http://hdl.handle.net/2117/19304 Title: Performance evaluation of WMN-GA system for low densities of clients and different settings of population size Authors: Oda, Tetsuya; Barolli, Admir; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos; Takizawa, Makoto 2013-05-16T13:22:36Z http://hdl.handle.net/2117/19301 Title: Multimedia transmissions over a MANET testbed: problems and issues Authors: Kulla, E.; Ikeda, Makoto; Oda, Tetsuya; Barolli, Leonard; Xhafa Xhafa, Fatos; Takizawa, Makoto 2013-05-16T13:12:58Z http://hdl.handle.net/2117/19300 Title: Data replication and synchronization in P2P collaborative systems Authors: Xhafa Xhafa, Fatos 2013-05-16T13:04:29Z http://hdl.handle.net/2117/19264 Title: A comparison study between two fuzzy-based trustworthiness systems for P2P networks Authors: Umezaki, K.; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos; Matsuo, Keita; Iwashige, J. 2013-05-15T15:47:19Z http://hdl.handle.net/2117/19263 Title: Tuning of operators in memetic algorithms for independent batch scheduling in computational grids Authors: Xhafa Xhafa, Fatos; Duran, B.; Barolli, Leonard; Kolici, Vladi; Miho, Rozeta; Takizawa, Makoto 2013-05-15T15:34:03Z http://hdl.handle.net/2117/19260 Title: Mission operations scheduling: complexity and resolution methods Authors: Xhafa Xhafa, Fatos; Sun, Junzi; Barolli, Admir; Takizawa, Makoto 2013-05-15T15:05:24Z http://hdl.handle.net/2117/19259 Title: A fuzzy-based cluster-head selection system for WSNs: a comparison study for static and mobile sensors Authors: Barolli, Leonard; Wang, Qi; Kulla, E.; Xhafa Xhafa, Fatos; Kamo, B.; Takizawa, Makoto 2013-05-15T14:48:08Z http://hdl.handle.net/2117/19258 Title: Performance evaluation of WMN-GA system for dense networks considering different distributions Authors: Barolli, Admir; Oda, Tetsuya; Barolli, Leonard; Xhafa Xhafa, Fatos; Takizawa, Makoto; Uchida, K. 2013-05-15T14:28:58Z http://hdl.handle.net/2117/19252 Title: The HOM problem is EXPTIME-complete Authors: Creus López, Carles; Gascón Caro, Adrià; Godoy Balil, Guillem; Ramos, Lander Abstract: The HOM problem questions whether the image of a given regular tree language through a given tree homomorphism is also regular. Decidability of HOM is an important theoretical question which was open for a long time. Recently, HOM has been proved decidable with a triple exponential time algorithm. In this paper we obtain an exponential time algorithm for this problem, and conclude that it is EXPTIME-complete. The proof builds upon previous results and techniques on tree automata with constraints. 2013-05-15T13:39:05Z http://hdl.handle.net/2117/19207 Title: Performance of OLSR and DSDV protocols in a VANET scenario: evaluation using CAVENET and NS3 Authors: Spaho, Evjola; Ikeda, Makoto; Barolli, Leonard; Xhafa Xhafa, Fatos; Younas, Muhammad; Takizawa, Makoto 2013-05-14T12:40:30Z http://hdl.handle.net/2117/19138 Title: An integrated fuzzy-based trustworthiness system for P2P communications in JXTA-overlay Authors: Umezaki, K.; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos; Younas, Muhammad; Iwashige, J. 2013-05-08T14:17:38Z http://hdl.handle.net/2117/18911 Title: Ant colony optimization theory : a survey Authors: Dorigo, Marco; Blum, Christian Abstract: Research on a new metaheuristic for optimization is often initially focused on proof-of-concept applications. It is only after experimental work has shown the practical interest of the method that researchers try to deepen their understanding of the method's functioning not only through more and more sophisticated experiments but also by means of an effort to build a theory. Tackling questions such as "how and why the method works" is important, because finding an answer may help in improving its applicability. Ant colony optimization, which was introduced in the early 1990s as a novel technique for solving hard combinatorial optimization problems, finds itself currently at this point of its life cycle. With this article we provide a survey on theoretical results on ant colony optimization. First, we review some convergence results. Then we discuss relations between ant colony optimization algorithms and other approximate methods for optimization. Finally, we focus on some research efforts directed at gaining a deeper understanding of the behavior of ant colony optimization algorithms. Throughout the paper we identify some open questions with a certain interest of being solved in the near future. Description: "Theoretical Computer Science Top Cited Article 2005-2010" 2013-04-22T10:09:40Z http://hdl.handle.net/2117/18900 Title: Impact of population size and number of generations on the performance of dense WMNs Authors: Barolli, A.; Oda, Tetsuya; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos; Takizawa, Makoto 2013-04-19T13:43:17Z