SCPE_7_1_01.pdf (PDF, ~3,6MB)
SCPE_7_1_01.zip (zipped PS, ~3MB)
| Abstracts | Volume 7, No. 1, March 2006 |
| SPECIAL ISSUE PAPERS |
|
|
This paper is concerned with infrastructural support for
nomadic agents. Agent migration provides a wide range of
advantages and benefits to system designers, however issues
relating to security and integrity mobile agents has mitigated
against the harvesting of their true potential. Within this
paper we introduce the Agent Travel Metaphor (ATM) which offers
a comprehensive metaphor fostering integrating of control and
security for mobile agents. We describe the metaphor together
with its incorporation within the Agent Factory multi-agent
system.
SCPE_7_1_01.pdf (PDF, ~3,6MB)
SCPE_7_1_01.zip (zipped PS, ~3MB)
|
|
|
When different agents communicate with each other, there needs to be
some way to ensure that the meaning of what one agent embodies is
accurately conveyed to another agent. It has been argued that
ontologies play a key role in communication among different agents.
However, in some situations, because there exist terminological
heterogeneities and incompleteness of pieces of information among
ontologies used by different agents, communication among agents will
be very complex and difficult to tackle. In this paper, we proposed
a solution to the problem for these situations. We used distributed
description logic to model the mappings between ontologies used by
different agents and further make a default extension to the DDL for
default reasoning. Then, base on the default extension of the DDL
model, a complete information query can be reduced to checking
default satisfiability of the complex concept corresponding to the
query.
SCPE_7_1_02.pdf (PDF, ~360KB)
SCPE_7_1_02.zip (zipped PS, ~403KB)
|
|
|
Mobile agents require access to computing resources on heterogeneous
systems across the Internet. They need to be able to negotiate
their requirements with the systems on which they wish to be hosted.
This paper presents a negotiation infrastructure with which agents
acquire time-limited resource contracts through negotiation with one
or more mediators instead of individual hosting systems. Mediators
represent groups of autonomous hosts. The negotiation protocol and
language are based on the WS-Agreement Specification, and have been
implemented and tested within the AgentScape framework.
SCPE_7_1_03.pdf (PDF, ~248KB)
SCPE_7_1_03.zip (zipped PS, ~247KB)
|
|
|
Software agents represent an interesting paradigm to approach complex and distributed systems. Their sociality enables to build multiagent systems, where different agents interact to pursue their goals. Multiagent systems can involve both cooperative and competitive agents. In both cases, the composition of different agents is an issue that must be faced by developers. In this paper, we propose to build infrastructures based on roles, which are abstractions that enable the composition of different agents in an open scenario. Some concrete examples are provided to support our proposal.ion within the Agent Factory multi-agent
system.
SCPE_7_1_04.pdf (PDF, ~368KB)
SCPE_7_1_04.zip (zipped PS, ~386KB)
|
|
|
Autonomous software agents are often claimed to become a new generation of tools facilitating efficient management of information. While a number of possible agent application areas can be found in the literature, support for ``academic mobility'' is not one of them. At the same time student mobility is one of the important objectives within the European Union and, as we argue in this paper, software agents could be used to streamline administrative processes involved in setting up student participation and help students that are interested in it as well as administrative units that have to support it. In this paper we introduce an agent system designed to facilitate student mobility, present UML diagrams of agents of that system and discuss an initial implementation of a system-skeleton.
SCPE_7_1_05.pdf (PDF, ~1MB)
SCPE_7_1_05.zip (zipped PS, ~1,2MB)
|
| RESEARCH PAPERS |
|
|
The yourSkyG custom astronomical image mosaicking software has a web
portal interface that allows custom access via
ordinary desktop computers with low bandwidth network connections to
high performance mosaicking software deployed
on a computational grid, such as
NASA's Information Power Grid (IPG). In this context, custom access refers to
on-the-fly mosaicking to meet user-specified criteria for region of
the sky to be mosaicked, data sets to be used, resolution, coordinate
system, projection, data type and image format. The portal uses pipelines
and data caches to construct multiple mosaics on the grid with high throughput.
SCPE_7_1_06.pdf (PDF, ~1,1MB)
SCPE_7_1_06.zip (zipped PS, ~2,3MB)
|
|
|
A comprehensive overview and survey of the developments
in optical bus parallel computing models is presented in this paper. The first model
proposed was the APPB in 1990. Since then, in the order of their
appearance, the remaining nine models surveyed are: APPBS, ASOS, LPB, RASOB,
AROB, LARPBS, PB, LAPOB and PR-MESH.
Research trends observed from this analysis indicate periods of model development leading to more and more sophistication and complexity in the model, followed by periods of model simplifications. These periods appears to occur in cycles. We note the widespread and global research interest in these models. The three most popular models appear to be RASOB, AROB and LARPBS. We also have analyzed a crucial aspect of these models, the bus cycle time definitions, and have determined inaccuracies in most of the definitions appearing in the literature. We also provide refinement to the definitions to correct such inaccuracies. SCPE_7_1_07.pdf (PDF, ~268KB)
SCPE_7_1_07.zip (zipped PS, ~275KB)
|