We evaluate the practical network coding (NC) gain in a wireless ad hoc networks. First, we introduce how network coding can be applied to IEEE 802.11 ad hoc networks. Next, we find obstructive factors by which the NC gain may decrease as compared with the theoretical NC gain. Finally, through the performance evaluation, we analyze why a performance difference occurs between practical and theor...

In fifth-generation (5G) cellular networks, users feed back to the base station index of precoder (from a codebook) be used for downlink transmission. The is strongly related user channel and in turn position within cell. We propose method by which an external attacker determines passively overhearing this unencrypted layer-2 feedback signal. first builds map fed indices Then, victim user, find...

We present a framework for group formation within teams of non-selfish agents cooperating in a dynamic environment with local broadcast communication. This framework is based on a set of six types of propositional attitudes, the concept of overhearing and a mechanism that allows agents to track the organization of the team. We explain the principles of this framework, formalize the organization...

Much cooperation among humans happens following a common pattern: by chance or deliberately, a person overhears a conversation between two or more parties and steps in to help, for instance by suggesting answers to questions, by volunteering to perform actions, by making observations or adding information. We describe an abstract architecture to support a similar pattern in societies of artific...

We describe an approach to improving the naturalness of a social dialogue system, Talkie, by adding disfluencies and other content-independent enhancements to synthesized conversations. We investigated whether listeners perceive conversations with these improvements as natural (i.e., human-like) as human-human conversations. We also assessed their ability to correctly identify these conversatio...