Search results for "Game Theory"

Enzyme replacement therapy in MPS II patients over 20years of age or older at treatment initiation: An international case series from the Hunter Outc…

2013

A Cognitive Tuning of Contention Windows in WiFi Infrastructure Networks

2009

In WiFi networks, mobile nodes compete for accessing a shared channel by means of a random access protocol called Distributed Coordination Function (DCF). Although this protocol is in principle fair, since it should guarantee that all the stations have the same probability to transmit on the channel, it has been shown that unfair behaviors may emerge in actual networking scenarios. These phenomena are due to different reasons, including non-standard configurations of the nodes, critical network topologies, and short-term performance observations. In this paper we propose a game-theoretic approach for defining an enhanced DCF scheme suitable for WiFi intelligent nodes employing cognitive fun…

Reputation management in distributed systems

2008

Several distributed applications, implemented over today’s Internet, are based on the assumption that participating agents collaborate in order to achieve their own goal. However, when these applications are modelled as unstructured distributed systems, the greater autonomy and decentralization encourage antisocial behaviours, which are likely to cause performance degradation for the whole system. This paper presents a fully distributed reputation management system that allows the evaluation of agent reputation in unstructured environments without any centralized coordination. The proposed approach is based on game theory and is capable of capturing the highly dynamic nature of the involved…

Simulation and anticipation as tools for coordinating with the future

2013

A key goal in designing an artificial intelligence capable of performing complex tasks is a mechanism that allows it to efficiently choose appropriate and relevant actions in a variety of situations and contexts. Nowhere is this more obvious than in the case of building a general intelligence, where the contextual choice and application of actions must be done in the presence of large numbers of alternatives, both subtly and obviously distinct from each other. We present a framework for action selection based on the concurrent activity of multiple forward and inverse models. A key characteristic of the proposed system is the use of simulation to choose an action: the system continuously sim…

Crime Treatment in Europe: A Review of Outcome Studies

2008

Die Qual der Wahl: Die Bedeutung des Regret bei Kaufentscheidungen

2003

Regret results from comparing the outcome of a chosen alternative to the outcome of a foregone alternative. Research shows that this emotion is highly relevant for consumer behavior and decision making, but in consumer research, only a few studies deal with regret. Most of these studies do not measure regret explicitly. And none of these studies include the antecedents of regret. They only examine the consequences of regret on consumer behavior, such as satisfaction. In contrast, the antecedents of regret, but not the consequences, has been a topic of interest in social psychology. Our research indicates that it is fruitful to analyze the antecedents of regret and its consequences together.…

Opinion Dynamics and Collective Decisions

2021

We expect that democracy enables us to utilize collective intelligence such that our collective decisions build and enhance social welfare, and such that we accept their distributive and normative consequences. Collective decisions are produced by voting procedures which aggregate individual preferences and judgments. Before and after, individual preferences and judgments change as their underlying attitudes, values, and opinions change through discussion and deliberation. In large groups, these dynamics naturally go beyond the scope of the individual and consequently might show unexpected self-driven macroscopic systems dynamics following socio-physical laws. On the other hand, aggregated …

User Psychology: Re-assessing the Boundaries of a Discipline

2010

Currently, efforts of psychologists to improve interactive technology have fragmented and the systemization of scientific knowledge stalled. There is no home for integrative psychological research on computer use. In this programmatic paper, we reassess three meta-scientific issues defining this discipline. As the first step, we pro- pose to extend the subject of study from the analysis of human mind in the interaction to the broader view of human as an intentional user of interactive technology. Hence, the discipline is most aptly called user psychology. Secondly, problem-solving epistemology is advocated as an alternative to the notion from natural sciences that progress in science involv…

Do coaching style and game circumstances predict athletes' perceived justice of their coach? A longitudinal study in elite handball and volleyball te…

2018

Objective: The present longitudinal study is the first to examine game to game fluctuations of perceived justice of elite volleyball and handball coaches. More specifically, we studied whether coaching style (i.e., need support versus control), coach behaviors (decision justifications), player’s status (i.e., starter or substitute), and game result (win/loss) predicted athletes’ perceived justice and its fluctuations. Methods: A longitudinal questionnaire study was performed during 6 consecutive weeks among Belgian female volleyball (N = 57) and male handball players (N = 39). We administered a general questionnaire (i.e., need support/control) the first week, and game-specific questionnair…

A possible solution of the puzzling variation of the orbital period of MXB 1659-298

2017

MXB 1659-298 is a transient neutron star Low-Mass X-ray binary system that shows eclipses with a periodicity of 7.1 hr. The source went to outburst in August 2015 after 14 years of quiescence. We investigate the orbital properties of this source with a baseline of 40 years obtained combining the eight eclipse arrival times present in literature with 51 eclipse arrival times collected during the last two outbursts. A quadratic ephemeris does not fit the delays associated with the eclipse arrival times and the addition of a sinusoidal term with a period of $2.31 \pm 0.02$ yr is required. We infer a binary orbital period of $P=7.1161099(3)$ hr and an orbital period derivative of $\dot{P}=-8.5(…