A new scheme to generate multiple weights used in opportunistic beamforming (OBF) system is proposed to deal with the performance degradation due to the fewer active users in the OBF system. In the proposed scheme, only two mini-slots are employed to create effective channels, while more channel candidates can be obtained via linearly combining the two effective channels obtained during the two...

We explore the task of multi-source morphological reinflection, which generalizes the standard, single-source version. The input consists of (i) a target tag and (ii) multiple pairs of source form and source tag for a lemma. The motivation is that it is beneficial to have access to more than one source form since different source forms can provide complementary information, e.g., different stem...

Following an analysis of human collaborative activities, we identify key features of an effective collaboration between humans and computers in open environments and present a conceptual framework for the design of collaborative interaction systems. Based on these principles, we propose an open architecture (OSCAR) and describe a prototype implemented on top of a flexible multi-agent system she...

ADELFE is a methodology proposed to help and guide the designer during the development of an Adaptive Multi-Agent System (AMAS). In this paper, we propose extensions to ADELFE in order to facilitate the task of the designer and help him to detect and correct the Non Cooperative Situations that the agent may encounter during its life. Keywords-ADELFE, Adaptive Multi-Agent Systems, Simulation Bas...

extensive researches on wireless sensor networks (wsns) have been performed and many techniques have been developed for the data link (mac) layer. most of them assume single-channel mac protocols. in the usual dense deployment of the sensor networks, single-channel mac protocols may be deficient because of radio collisions and limited bandwidth. hence, using multiple channels can significantly ...