Local and Global Trust Based on the Concept of Promises

We use the notion of a promise to define local trust between agents possessing autonomous decision-making. An agent is trustworthy if it is expected that it will keep a promise. This definition satisfies most commonplace meanings of trust. Reputation is then an estimation of this expectation value that is passed on from agent to agent. Our definition distinguishes types of trust, for different behaviours, and decouples the concept of agent reliability from the behaviour on which the judgement is based. We show, however, that trust is fundamentally heuristic, as it provides insufficient information for agents to make a rational judgement. A global trustworthiness, or community trust can be defined by a proportional, self-consistent voting process, as a weighted eigenvector-centrality function of the promise theoretical graph

Promises, Impositions, and other Directionals

Promises, impositions, proposals, predictions, and suggestions are categorized as voluntary co-operational methods. The class of voluntary co-operational methods is included in the class of so-called directionals. Directionals are mechanisms supporting the mutual coordination of autonomous agents. Notations are provided capable of expressing residual fragments of directionals. An extensive example, involving promises about the suitability of programs for tasks imposed on the promisee is presented. The example illustrates the dynamics of promises and more specifically the corresponding mechanism of trust updating and credibility updating. Trust levels and credibility levels then determine the way certain promises and impositions are handled. The ubiquity of promises and impositions is further demonstrated with two extensive examples involving human behaviour: an artificial example about an agent planning a purchase, and a realistic example describing technology mediated interaction concerning the solution of pay station failure related problems arising for an agent intending to leave the parking area.Comment: 55 page

A process algebra based framework for promise theory

We present a process algebra based approach to formalize the interactions of computing devices such as the representation of policies and the resolution of conflicts. As an example we specify how promises may be used in coming to an agreement regarding a simple though practical transportation problem.Comment: 9 pages, 4 figure

Digital Storytelling and History Lines: Community Engagement in a Master-Planned Development

The introduction of new media and information and communication technology enables a greater variety of formats and content beyond conventional texts in the application and discourse of public history projects. Multimedia and personalised content requires public historians and cultural community developers to grasp new skills and methods to make representations of and contributions to a collective community memory visible. This paper explores the challenge of broadening and reinvigorating the traditional role of the public historian working with communities via the facilitation, curation and mediation of digital content in order to foster creative expression in a residential urban development. It seeks to better understand the role of locally produced and locally relevant content, such as personal and community images and narratives, in the establishment of meaningful social networks of urban residents. The paper discusses the use of digital storytelling and outlines the development of a new community engagement application we call History Lines