Massive multi-agent systems with emergent global behavior represent a new paradigm in designing and building program systems for handling complex problems. Emergence, nonlinearity and self-organization of global behavior underpin robustness, flexibility and autonomy of massive multi-agent systems. On the other hand, this makes the traditional design approach difficult, if not impossible. In thi...

according to the logic of 'weak ties' partnership organized through links with a wider range of people causes of social capital among a group of citizens will increase. so it seems, increasing participation among people, ultimately leading to increased cooperative activities among them. while the impact of social networks on political relations, much attention has been. there is very ...

My primary research interest is social behavior of software agents acting in general-sum normal form games. In an environment with another agent, an agent needs to be able to identify if the opponent is hostile or cooperative by looking at the opponent’s actions, and respond appropriately. If the opponent is hostile, the agent should guard against it. Even for a self-interested agent, cooperati...

Physical layer security is an attractive security mechanism, which exploits the randomness characteristics of wireless transmission channel to achieve security. However, it is hampered by the limitation of the channel condition that the main channel must be better than the eavesdropper channel. To alleviate the limitation, cooperative communication is introduced. Few studies have investigated t...

Cooperative games can represent interactions between multiple agents in many real-life situations. Thus single-stage cooperative games provide a stylized, abstracted environment for testing algorithms that allow artificial agents to learn to cooperate in such settings. Individual reinforcement learners often fail to learn coordinated behavior. Using an evolutionary approach to strategy selectio...

Cooperative behavior is widespread among animals, yet the neural mechanisms have not been studied in detail. We examined cooperative territory defense behavior and associated neural activity in candidate forebrain regions in the cichlid fish, Astatotilapia burtoni. We find that a territorial male neighbor will engage in territory defense dependent on the perceived threat of the intruder. The re...

I use a simple model of social dilemmas arising from environmental problems to study the effects of certain stylized solution strategies. It is often a central characteristic of these environmental dilemmas that action effects are spatially concentrated, i.e. the strength of side effects of individual actions declines with the distance to the source of pollution. I use computer simulations base...

Article history: Initial receipt 8 March 2017 Final revision received 23 August 2017 Herewe examine the roles of interpersonal valuation and gratitude in the formation of cooperative relationships. Building on prior work, we draw on the concept of a welfare tradeoff ratio (WTR), an internally computed index of the extent to which one person values another person's welfare relative to his or her...

Cooperative behaviors are defined as the production of common goods benefitting all members of the community at the producer’s cost. They could seem to be in contradiction with natural selection, as non-cooperators have an increased fitness compared to cooperators. Understanding the emergence of cooperation has necessitated the development of concepts and models (inclusive fitness, multilevel s...

Social aspects of multiplayer games are well known as contributors to game success, with online friendships and socialization expected to expand and strengthen a player-base. Understanding the nature of social behavior and determining the impact of cooperation on gameplay is thus important to game design. In this work, we make use of data exposed through in-game and web-based API’s of two conte...