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Recent Projects

IRAKLEITOS II: Semantic Peer to Peer Networks

Duration: 
2010-2013
Objectives: 

The aim of this project is to investigate distributed reasoning and retrieval methods using ontology units in self-organized peer-to-peer systems.

Type: 

Funded by the Ministry of Education, in the context of ESPA.

Research topic: 

Distributed Reasoning and Retrieval using Ontologies

Agreement Technologies COST Action IC0801

Duration: 
2008-2012
Objectives: 

Agreement Technologies refer to computer systems in which autonomous software agents negotiate with one another, typically on behalf of humans, in order to come to mutually acceptable agreements. This Action aims at coordinating national efforts on a new paradigm for next generation distributed systems, based on the concept of agreement between computational agents. An entity may choose whether to fulfill an agreement or not, and it should fulfill it when there is an obligation to do so derived from the standing agreements. Autonomy, interaction, mobility and openness are the characteristics that the paradigm will cover from a theoretical and practical perspective. Semantic alignment, negotiation, argumentation, virtual organisations, learning, real time, and several other technologies will be in the sandbox to define, specify and verify such systems. Both functional and non-functional properties are to be studied. Security on execution will be based on trust and reputation measures. These measures will help agents to determine with whom to interact and what terms and conditions to accept.
Keywords: Agreement, Multiagent Systems, Semantics

Domain : Information and Communication Technologies
Action title : Agreement Technologies

Pythagoras: Dynamic Formation of Collaborative Agent Organizations

Duration: 
2004 - 2007
Objectives: 

Agent Organizations are complex entities composed of several agents that collaborate to achieve certain tasks. The Pythagoras project aims at developing new efficient methods for the formation and the collaborative operation of dynamic agent organizations. We propose to represent the formation process as a 3-step procedure consisting of the following steps: 1) creation of the organization's structure, 2) task/role allocation to the agents in the organization, 3) planning and acting by the agents. Since the agents that participate in an organization can be diverse, having different skills and resources, and also different personal goals, the processes of creating the organization's structure and allocating roles/tasks to agent can be heavily constrained and very complex. We intend to investigate distributed constraint-based reasoning techniques for the efficient implementation of these processes.

Achievements: 

GRID4ALL

Duration: 
2006-2009
Objectives: 

Grid4All aims to enable domestic users, non-profit organisations such as schools, and small enterprises, to share their resources and to access massive Grid resources when needed, envisioning a future in which access to resources is democratised, readily available, cooperative, and inexpensive. Grid4All goals entail a system pooling large amounts of cheap resources (connecting to commercial cluster providers when needed); a dynamic system satisfying spikes of demand; using self management techniques to scale and adapt to changes in environment; supporting isolated, secure, dynamic, geographically distributed user groups and using secure peer-to-peer techniques to federate large numbers of small-scale resources into large-scale Grids.

The technical issues addressed are aspects of security, support for multiple administrative and management authorities, self-management by combining the strong points of structured overlay P2P networks and that of component models, on-demand resource allocation, heterogeneity, and fault tolerance.

The proof of concept applications include: e-learning tools for collaborative editing in schools and a digital content processing service accessible by end residential users.

OntoSum: Ontology Management and Exploitation for text summarization

IIT DEMOKRITOS. EXODUS SA, UNIVERSITY OF THE AEGEAN, DARTMOUTH COLLEGE

Duration: 
2006 -2008
Objectives: 

The OntoSum project aims at developing new methods and techniques for - Ontology Learning - Ontology Coordination, Mapping and Ontology merging - Ontology-based Summarization. TheOntoSum methodology consists of the following steps - Specification of the theoretical framework - Development of methods and of a prototype system - Specification of the evaluation methodology - Exploitation and evaluation of the developed methods and system in two case studies: (a) in the context of the e-Centric EXODUS platform for document management, and (b) in biomedical applications that are being developed in DEVLAB of Dartmouth College. - Dissemination of results