Now showing 1 - 7 of 7
  • Publication
    An agent based approach to adaptive navigational support within 3D-environments
    This paper investigates mechanisms and approaches to assisting user navigation and exploration within 3-dimensional wurlds. Specifically it advocates the deployment of an agentbased approach to dynamic system assistance and intervention. A performance equation is presented in a basic and an extended version, which is used to activate system interventions and tu evaluate user performances online and offline. The measure is derived via a light-weight computationally inexpensive masking approach. We describe some navigation experiments and the results of navigational intervention via the damping of the sensitivity of the navigational keys. Interestingly the navigational assistance does not yield improvements in the subjects’ navigational abilities.
  • Publication
    Agent chameleons: moving minds from robots to digital information spaces
    Agent Chameleons investigates the motivation, desire and possibility of agent migration and mutation between real and artificial spaces. The agent must be able to mutate and change its form and function depending upon the environment within which it is situated. The form inextricably dictates or constrains its behaviour and capabilities. This paper introduces the Agent Chameleon Architecture which supports agent migration and mutation.
  • Publication
    MiRA - mixed reality agents
    In recent years, an increasing number of Mixed Reality (MR) applications have been developed using agent technology—both for the underlying software and as an interface metaphor. However, no unifying field or theory currently exists that can act as a common frame of reference for these varied works. As a result, much duplication of research is evidenced in the literature. This paper seeks to fill this important gap by outlining ‘‘for the first time’’ a formal field of research that has hitherto gone unacknowledged, namely the field of Mixed Reality Agents (MiRAs), which are defined as agents embodied in a Mixed Reality environment. Based on this definition, a taxonomy is offered that classifies MiRAs along three axes: agency, based on the weak and strong notions outlined by Wooldridge and Jennings (1995); corporeal presence, which describes the degree of virtual or physical representation (body) of a MiRA; and interactive capacity, which characterises its ability to sense and act on the virtual and physical environment. Furthermore, this paper offers the first comprehensive survey of the state-of-the-art of MiRA research and places each project within the proposed taxonomy. Finally, common trends and future directions for MiRA research are discussed. By defining Mixed Reality Agents as a formal field, establishing a common taxonomy, and retrospectively placing existing MiRA projects within it, future researchers can effectively position their research within this landscape, thereby avoiding duplication and fostering reuse and interoperability.
      1722Scopus© Citations 70
  • Publication
    Future reasoning machines : mind and body
    Purpose – In investing energy in developing reasoning machines of the future, one must abstract away from the specific solutions to specific problems and ask what are the fundamental research questions that should be addressed. This paper aims to revisit some fundamental perspectives and promote new approaches to reasoning machines and their associated form and function. Design/methodology/approach – Core aspects are discussed, namely the one-mind-many-bodies metaphor as introduced in the agent Chameleon work. Within this metaphor the agent's embodiment form may take many guises with the artificial mind or agent potentially exhibiting a nomadic existence opportunistically migrating between a myriad of instantiated embodiments. The paper animates these concepts with reference to two case studies. Findings – The two case studies illustrate how a machine can have fundamentally different capabilities than a human which allows us to exploit, rather than be constrained, by these important differences. Originality/value – Aids in understanding some of the fundamental research questions of reasoning machines that should be addressed.
      547Scopus© Citations 8
  • Publication
    The AMPERE Algorithm : Area-based Masking with the PERformance Equation
    This paper is concerned with the employment of an autonomous and intelligent agent within the context of a 3-dimensional virtual environment. As the agent is immersed within the virtual environment, it empowers the 3D world with mechanisms to adjust itself to the specific needs of its user. Therefore, the agent serves as a middle layer between user and the environment. The 3-dimensional environment thus evolved into an intelligent user interface. We track user’s motion within this environment and present an equation upon which the agent classifies the user’s performance. Based upon this performance value, the agent autonomously determines if the user would benefit form system navigational support. The performance equation is based on an area-based mask that is applied on the trajectory image of the user’s movements. Within this paper we discuss the effects of applying different masks onto the trajectory image. We evaluate, why the actual shape of the mask is not as crucial to the performance measure as one might anticipate.
  • Publication
    Bus Catcher: A Context Sensitive Prototype System for Public Transportation Users
    In this paper we describe the architectural and functional characteristics of Bus Catcher, a context sensitive prototype system for public transportation users. Bus Catcher assists mobile users in planning their bus rides by providing timely and accurate information about current bus locations and estimated arrival times. A complete report on the implementation together with a preliminary evaluation of the system is provided in this paper.
      846Scopus© Citations 18
  • Publication
    Intentional embodied agents
    Virtual environments present a suitable platform for the deployment of agent technologies. We advocate a system of virtual agents that are capable of changing their form in order to expand their capability sets. We use strong BDI agents for the control of this adaptation of form and behaviour. This paper outlines a system that allows for adaptable virtual agents, with the ability to change their form to suit the task at hand based upon deliberative reasoning.