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In Mobile Wireless Sensor Networks (MWSNs), location information of nodes is the basis of many applications. Compared with that in a static network, the localization issue in a mobile network is more difficult due to uncertainty of node positions, thus much more challenges are brought to MWSNs. In this paper, we propose three localization models to evaluate performances of DV-hop localization algorithm...
New generation ubiquitous e-Learning system is the key for merging ubiquitous learning into the mainstream of education. FekLoma is such a u-Learning system, which is specially designed according to the requirements of ubiquitous e-Learning environments by bottom-up approach. The system is developed with ULO technologies, and is realized with programmable and extensible programming facility. Based...
In this paper, we analyze a new type of delay tolerant networks (DTN) where each node owns multiple dedicated messengers, called pigeons. The only form of inter- node communication is for a pigeon to periodically carry a batch of messages originated at the home node, deliver to the corresponding destination nodes and return home. We name this as homing-pigeon (HoP) based routing mechanism, which is...
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