Document Type	Doctoral Thesis
Author	Rodic, Daniel
Email	daniel.rodic@mamitech.com
URN	etd-10112005-090929
Document Title	Intelligent Distributed Agent Based Architecture
Degree	PhD (Computer Science)
Department	Computer Science
Supervisor	Advisor Name Title Prof A P Engelbrecht
Keywords	no key words available
Date	2005-07-24
Availability	unrestricted
Abstract This thesis presents work done on the development of a multi-agent system architecture that facilitates coordination and a novel social networks based approach to coordination. The field of multi-agent system research is undergoing tremendous expansion and it would be impossible to address all the issues related to the field. Instead, this thesis focuses on the coordination aspect of multi-agent systems. The architecture presented here is named the INtelligent Distributed Agent Based Architecture, INDABA. INDABA, as a hybrid agent architecture, combines the sub-symbolic knowledge representation layered architecture with a symbolic layer that allows for deliberative reasoning and learning. INDABA also introduces a layer that facilitates coordination in a society of agents, namely the interaction layer. The new approach to coordination was inspired by social networks, as observed in higher mammalian societies. Two social relationships were explored, namely kinship and trust. Coordination is achieved through team selection. Using characteristics of social networks, such as learning and the ability to deal with uncertainties, the best team is selected for task execution. The experiments conducted for the purpose of this thesis were done on three levels. Firstly, an abstract simulated environment was created where a society of a large number of agents could be observed. Secondly, experiments were done in a more realistic simulated robot environment. The last set of experiments was done in a real-world environment, with the implementation of INDABA in embodied mobile agents (robots). The experiments have confirmed the applicability of INDABA as an agent architecture, as well as the validity of the social networks coordination approach.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    00front.pdf 244.93 Kb 00:01:08 00:00:34 00:00:30 00:00:15 00:00:01   01chapter1.pdf 144.50 Kb 00:00:40 00:00:20 00:00:18 00:00:09 < 00:00:01   02chapter2.pdf 210.48 Kb 00:00:58 00:00:30 00:00:26 00:00:13 00:00:01   03chapter3.pdf 214.55 Kb 00:00:59 00:00:30 00:00:26 00:00:13 00:00:01   04chapter4.pdf 187.63 Kb 00:00:52 00:00:26 00:00:23 00:00:11 00:00:01   05chapter5.pdf 176.05 Kb 00:00:48 00:00:25 00:00:22 00:00:11 < 00:00:01   06chapter6.pdf 226.88 Kb 00:01:03 00:00:32 00:00:28 00:00:14 00:00:01   07chapter7.pdf 327.91 Kb 00:01:31 00:00:46 00:00:40 00:00:20 00:00:01   08chapter8.pdf 193.17 Kb 00:00:53 00:00:27 00:00:24 00:00:12 00:00:01   09chapter9.pdf 331.37 Kb 00:01:32 00:00:47 00:00:41 00:00:20 00:00:01   10chapter10.pdf 145.66 Kb 00:00:40 00:00:20 00:00:18 00:00:09 < 00:00:01   11back.pdf 201.99 Kb 00:00:56 00:00:28 00:00:25 00:00:12 00:00:01