Search results for "Lemma"
showing 10 items of 210 documents
A saturated strategy robustly ensures stability of the cooperative equilibrium for Prisoner's dilemma
2016
We study diffusion of cooperation in a two-population game in continuous time. At each instant, the game involves two random individuals, one from each population. The game has the structure of a Prisoner's dilemma where each player can choose either to cooperate (c) or to defect (d), and is reframed within the field of approachability in two-player repeated game with vector payoffs. We turn the game into a dynamical system, which is positive, and propose a saturated strategy that ensures local asymptotic stability of the equilibrium (c, c) for any possible choice of the payoff matrix. We show that there exists a rectangle, in the space of payoffs, which is positively invariant for the syst…
REPEATED GAMES WITH PROBABILISTIC HORIZON
2005
Repeated games with probabilistic horizon are defined as those games where players have a common probability structure over the length of the game's repetition, T. In particular, for each t, they assign a probability pt to the event that "the game ends in period t". In this framework we analyze Generalized Prisoners' Dilemma games in both finite stage and differentiable stage games. Our construction shows that it is possible to reach cooperative equilibria under some conditions on the distribution of the discrete random variable T even if the expected length of the game is finite. More precisely, we completely characterize the existence of sub-game perfect cooperative equilibria in finite s…
Building emotional agents for strategic decision making
2015
Experimental economics has many works that demonstrate the influence of emotions and affective issues on the process of human strategic decision making. Personality, emotions and mood produce biases on what would be considered the strategic solution (Nash equilibrium) to many games. %CAMBIO% Thus considering these issues on simulations of human behavior may produce results more aligned with real situations. We think that computational agents are a suitable %CAMBIO% technology to simulate such phenomena. We propose to use O3A, an Open Affective Agent Architecture to model rational and affective agents, in order to perform simulations where agents must take decisions as close as possible to h…
Ethics in designing intelligent systems
2019
The idea of Hume’s guillotine contains the argument that one cannot derive values from facts. As intelligent systems operate with facts, Hume’s famous dilemma seems to contradict the very idea of being able to create ethical intelligent systems. In a closer look, ethics is a system of rules guiding actions. Actions always have factual or cognitive aspects, as well as evaluative or emotional aspects. Therefore, Hume’s juxtaposition of facts and norms is not well-founded. Instead of separating the facts and norms it should rather ask what kinds of facts are associated to what kinds of norms. Consequently, Hume’s guillotine sets no limits in processing ethical information, as one can combine f…
The Stability-Plasticity Dilemma: Investigating the Continuum from Catastrophic Forgetting to Age-Limited Learning Effects
2013
The stability-plasticity dilemma is a well-know constraint for artificial and biological neural systems. The basic idea is that learning in a parallel and distributed system requires plasticity for the integration of new knowledge, but also stability in order to prevent the forgetting of previous knowledge. Too much plasticity will result in previously encoded data being constantly forgotten, whereas too much stability will impede the efficient coding of this data at the level of the synapses. However, for the most part, neural computation has addressed the problems related to excessive plasticity or excessive stability as two different fields in the literature.
Vietnam as an emerging destination for offshore outsourcing of software development for finnish companies: A conceptual perspective
2009
Companies are constantly under pressure to produce software products more efficiently and within tight budgets. Offshore outsourcing has been seen as one solution to the dilemma, and lucrative outsourcing businesses have evolved in many countries, such as India, China and Russia. Vietnam is now emerging within this global outsourcing sector. This study investigates Vietnam as an offshore outsourcing destination for Finnish companies for developing their software products and related services. The research was undertaken by reviewing the literature of a) offshore outsourcing, b) offshore software production, c) information technology industry in developing countries, especially in Vietnam an…
Religion, Empathy, and Cooperation: A Case Study in the Promises and Challenges of Modeling and Simulation
2019
The Cognitive Science of Religion (CSR) is developing a sophisticated naturalistic account of religion, grounded in empirical research. However, there are limitations to establishing an empirical basis for theories about religion’s role in human evolution. Computer modeling and simulation offers a way to address this experimental constraint. A case study in this approach was conducted on a key theory within CSR that recently has come under serious challenge: the Supernatural Punishment Hypothesis, which posits religion facilitated the shift from small, homogeneous social units to large, complex societies. It has been proposed that incorporating empathy as a proximate mechanism for cooperati…
Lifestyle counseling in type 2 diabetes prevention: a case study of a nurse's communication activity to produce change talk.
2006
As a case study, this article describes a nurse's communication activity, focusing on change talk during lifestyle counseling in primary healthcare. All videotaped counseling sessions with a single patient within a period of two years were transcribed verbatim. In the analysis, an emphasis was placed on the nurse's communication activity that produced change talk, how the nurse initiated change talk, and how the patient received it. The observations provide evidence that the dilemma of simultaneously maintaining professional authority and patient perspective leads to sensitivity in lifestyle counseling. Three categories of change talk were identified: rejected, restrictive, and expansive ch…
Police violence in West Africa : Perpetrators' and ethnographers' dilemmas
2012
This article explores the use of violence by police officers and gendarmes in Ghana and Niger. We analyse how popular discourses, legal and organizational conditions frame the police use of violence. Acts of violence by police are situated in this inconsistent framework and can be seen as legal and appropriate, despicable and brutal, or as useful and morally legitimate. Thus, every time the police use violence, they face a major dilemma: legally and morally justified violence can be a source of long-term legitimacy; but because of multiple possible readings of a certain situation (according to different, conflicting moral and legal discourses), the very same action has potentially delegiti…