Splitting algorithm for DMT optimal cooperative MAC protocols in wireless mesh networks

A cooperative protocol for wireless mesh networks is proposed in this paper. The protocol implements both on-demand relaying and a selection of the best relay terminal so only one terminal is relaying the source message when cooperation is needed. Two additional features are also proposed. The best relay is selected with a splitting algorithm. This approach allows fast relay selection within less than three time-slots, on average. Moreover, a pre-selection of relay candidates is performed prior to the splitting algorithm. Only terminals that are able to improve the direct path are pre-selected. So efficient cooperation is now guaranteed. We prove that this approach is optimal in terms of diversity-multiplexing trade-off. The protocol has been designed in the context of Nakagami-mfading channels. Simulation results show that the performance of the splitting algorithm does not depend on channel statistics

On the production of a multimodal news item : an argumentative approach

The present paper deals with the production of a multimodal news item from an ethnographic perspective, aiming at fully understanding the role played by news values, i.e. shared criteria for news selection, in newsroom argumentation. The news item we consider is the picture news from Corriere del Ticino, the main Italian-language newspaper in Switzerland. As the Italian name fototesto says, this news item combines a verbal and a photographical component, presenting the journalists with particular challenges in its selection. To shed light on this production process, we take as a case study a picture news on eco-friendly heat distribution and the editorial conference leading to its choice, which took place on January 24, 2013. We analyze the interaction from the viewpoint of argumentation theory, combining Pragma-Dialectics (van Eemeren and Grootendorst) and the Argumentum Model of Topics (Rigotti and Greco Morasso 2009, 2010, under review), and unravel the reasons behind choices in content and form taken collaboratively by the journalists

Towards realistic core-failure-resilient scheduling and analysis

Presented at IEEE Real-Time Systems Symposium (RTSS 2015). 1 to 4, Dec, 2015. San Antonio, U.S.A..Goal: Meeting all task deadlines on a multicore platform even when a core suddenly fails and is rendered unusable. • Model: When a core fails, whichever task was running there is killed but its deadline must still be me