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FlaIRS 2006 - 19th International Florida Artificial Intelligence Research Society Conference

作者： Bhatt, Mehul Rahayu, Wenny Sterling, Gerald Department of Computer Science La Trobe University Melbourne 3086 Australia Air-Operations Division DSTO PO Box 4331 Melbourne 3001 Australia

We use a qualitative theory of spatial change and illustrate some of the key representational aspects of specifying such a theory using a formalism to reason about action & change;an effort that we regard to be essential toward a general integration of qualitative spatial reasoning with reasoning about the dynamic, causal aspects of spatial change. A topological theory of space, namely the region connection calculus, is used as the spatial metaphor in this work;the reason here primarily being that topological distinctions are inherently qualitative in nature and also because a relational approach as general as the RCC is representative of a similar class of relational techniques in the QSR domain. As such, our results can be easily generalised over a wide range of calculi, encompassing other aspects of space, that are based on similar semantics. The main aim of this paper is to illustrate first ideas on how a causal perspective to qualitative spatial reasoning may be provided using the situation calculus, which is a formalism to reason about dynamically changing domains, The minimalist notions of space and/or spatial dynamics in this paper are based on the hypothesis that it is imperative to approach the problem of the said integration at a elementary level before a higher-level abstraction involving complex actions & events is developed. Copyright © 2006. American Association for Artificial Intelligence (***). All rights reserved.

关键词： Information analysis

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Advanced course for doctors as departmental IT network administrators in anesthesia and intensive care units

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Journal of Clinical Monitoring and Computing 2006年第5期20卷 333-339页

作者： lanza, Vincenzo Huang, Chun-Hsi Department of Anaesthesia Ospedale Buccheri La Ferla Via Messina Marine 197 Palermo 90123 Italy Department of Computer Science and Engineering University of Connecticut Storrs CT 06269 United States

The design and administration of a departmental computer network (Local Area Network) in anesthesiology and intensive care offer the opportunity to manage clinical information and control the work-flow. To improve the local network, after basic design, intelligence is necessary to maintain its efficiency. For this reason the role of a medical administrator of the network is fundamental because he is a qualified figure who recognizes the most important characteristics that a network must have, knows the users of the system, represents a valid consultant for the technician that has to build the network, and is able to face possible breakdowns. This paper illustrates the structure of a course to train a medical network administrator in anesthesiology and critical care. © Springer science+Business Media, Inc. 2006.

关键词： Local area networks

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MyEvalvid-NT - A Simulation Tool-set for Video Transmission and Quality Evaluation

MyEvalvid-NT - A Simulation Tool-set for Video Transmission ...

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IEEE Region 10 International Conference TENCON

作者： Chia-Yu Yu Chih-Heng Ke Ce-Kuen Shieh Naveen Chilamkurti Department of Electrical Engineering National Engineering Kung University Taiwan Department of Computer Science and Computer Engineering La Trobe University Melbourne Australia

In this paper, we propose a novel realistic simulation tool-set known as MyEvalvid-NT for evaluating video delivery over simulated networks. This tool-set integrates Evalvid and NS2. Though PSNR is most often used to measure the perceived quality by an end user, it is time-consuming to calculate PSNR when evaluating a long video sequence. To avoid overhead, in this paper, we used decodable frame rate (Q) as our performance metric to evaluate the received video quality. We use a video transmission over erroneous wireless network to demonstrate the simulation using this tool-set. We also showed that Q can measure perceived video quality adequately as PSNR. With this tool-set, researchers can easily analyze their designed mechanisms, such as network protocols or QoS control schemes in a realistic simulation environment. In brief, researchers who utilize our proposed QoS assessment framework will be benefited in verifying their designs regarding video transmission over simulated network

关键词： PSNR Decoding Traffic control Wireless networks Telecommunication traffic Computational modeling Q measurement Quality of service IP networks Web and internet services

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Vibrotactile feedback for brain-computer interface operation

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Computational Intelligence and Neuroscience 2007年第1期2007卷 48937页

作者： Cincotti, Febo Kauhanen, laura Aloise, Fabio Palomäki, Tapio Caporusso, Nicholas Jylänki, Pasi Mattia, Donatella Babiloni, Fabio Vanacker, Gerolf Nuttin, Marnix Marciani, Maria Grazia Millán, José Del R. Laboratory of Neuroelectrical Imaging and Brain Computer Interface Fondazione Santa Lucia IRCCS Roma 00179 Via Ardeatina 306 Italy Laboratory of Computational Engineering Helsinki University of Technology TKK 02015 P.O. Box 9203 Finland Department of Computer Science University of Bari Bari 70125 Via Orabona 4 Italy Department of Mechanical Engineering Katholieke Universiteit Leuven Leuven 3000 Celestijnenlaan 300 B Belgium Dipartimento di Fisiologia Umana e Farmacologia Universitá Degli Studi di Roma la Sapienza Roma 00185 Piazzale Aldo Moro 5 Italy Dipartimento di Neuroscienze Universitá Degli Studi di Roma Tor Vergata Roma 00173 Via Montpellier 1 Italy IDIAP Research Institute Martigny 1920 Switzerland Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne 1015 Switzerland

To be correctly mastered, brain-computer interfaces (BCIs) need an uninterrupted flow of feedback to the user. This feedback is usually delivered through the visual channel. Our aim was to explore the benefits of vibrotactile feedback during users' training and control of EEG-based BCI applications. A protocol for delivering vibrotactile feedback, including specific hardware and software arrangements, was specified. In three studies with 33 subjects (including 3 with spinal cord injury), we compared vibrotactile and visual feedback, addressing: (I) the feasibility of subjects' training to master their EEG rhythms using tactile feedback;(II) the compatibility of this form of feedback in presence of a visual distracter;(III) the performance in presence of a complex visual task on the same (visual) or different (tactile) sensory channel. The stimulation protocol we developed supports a general usage of the tactors;preliminary experimentations. All studies indicated that the vibrotactile channel can function as a valuable feedback modality with reliability comparable to the classical visual feedback. Advantages of using a vibrotactile feedback emerged when the visual channel was highly loaded by a complex task. In all experiments, vibrotactile feedback felt, after some training, more natural for both controls and SCI users.

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A new end-to-end QoS mechanism for video delivery over heterogeneous networks

A new end-to-end QoS mechanism for video delivery over heter...

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IFIP International Conference on Wireless and Optical Communications Networks (WOCN)

作者： U. Shirwadkar N. Chilamkurti Chih-Heng Ke C.K. Shieh Department of Computer Science and Computer Engineering La Trobe University Melbourne Australia National Cheng Kung University Taiwan

The need for QoS for multimedia traffic arouse from the fact that the current network is a best effort network where all packets are treated equally irrespective of their importance. Moreover when a video packet changes its mode of transport from wired to wireless there arises a need to identify these packets and provide them with prioritized service to achieve end-to-end QoS. In this paper we used a DiffServ network model for the wired network where the INGRESS executed enhanced token bucket three marker system (ETBMS). The framework also describes a video differentiator present in the access point which identifies the video packets and maps it to corresponding IEEE 802.11e prioritized video service queue. We demonstrated via simulation the proposed concept and examined the QoS parameters like end-to-end delay and video quality. The results illustrate that the proposed scheme exhibits better video delivery and QoS in heterogeneous networks

关键词： Quality of service Diffserv networks Video on demand Telecommunication traffic Videoconference Traffic control IP networks computer science computer networks Delay

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Generating and Supporting Dynamic Heterogeneous MAS

Generating and Supporting Dynamic Heterogeneous MAS

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IEEE/ACS International Conference on Pervasive Services (ICPS)

作者： Jayaputera Zaslavsky Seng Wai Loke CSIT Monash University VIC Australia Department of Computer Science and Computer Engineering La Trobe University VIC Australia

One of the grand challenges in agent technology research is quasi-automatic development of heterogeneous and dynamic multiagent systems using agent oriented software engineering (AOSE) tools. This paper presents an innovative approach to developing and supporting multiagent systems at run-time. Multiagent systems (MASs) can and should be generated dynamically based on high-level user specifications which are transformed into a mission. Dynamically generating agents could also be offered as a pervasive service. Heterogeneity of MASs refers to diverse functionality and constituency of the system which include mobile as well as host associated software agents. This paper proposes and demonstrates on-demand and just-in-time agent generation approach which is combined with run-time support for MASs. Run-time support is based on mission cost-efficiency and objectives which enable termination, generation, injection and replacement of software agents as the mission evolves. We present the formal underpinning of our approach and describe the prototype tool - called eHermes, which has been implemented using specific agent platforms. Lessons and results of testing eHermes are reported and analyzed

关键词： Runtime Multiagent systems Software agents Prototypes Software engineering Software prototyping Testing Intelligent agent US department of Commerce Australia

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A New Framework for H.264 Video Delivery over Heterogeneous Networks

A New Framework for H.264 Video Delivery over Heterogeneous ...

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International Conference on Systems and International Conference on Mobile Communications and Learning Technologies, (ICN/ICONS/MCL) International Conference on Networking

作者： Chih-Heng Ke Ce-Kuen Shieh N. Chilamkurti U. Shirwadkar National Cheng Kung University Taiwan Department of Computer Science and Computer Engineering La Trobe University Melbourne Australia

In this paper we present a new framework for quality H.264 video delivery from wired to wireless networks. The proposed solution is an extension of ETBMS in conjunction with IEEE 802.11e wireless protocol in EDCF mode. The analysis of network delay and video quality shows that the proposed solution which redefines the DSCP fields in DiffServ network, uses AF mechanism with IEEE 802.11e protocol for H.264 video traffic, yields significant results. Thus a video data can be provided with better Quality of Service (QoS) in a heterogeneous network.

关键词： Quality of service Diffserv networks Video on demand Videoconference Telecommunication traffic IP networks Wireless networks Streaming media computer science Wireless application protocol

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The MHS methodology: analysis and design for context-aware systems

The MHS methodology: analysis and design for context-aware s...

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IEEE Workshop on Software Technologies for Future Embedded Systems

作者： E. Syukur S.W. Loke Caulfield Institute of Technology Monash University Australia Department of Computer Science and Computer Engineering La Trobe University Australia

This paper presents a methodology (is called MHS) for analyzing, and designing pervasive systems starting from designing pervasive environments, entities to pervasive software components. Our MHS methodology is general, in that it is not only specific to one particular domain, it is applicable to a wide range of pervasive environments, comprehensive, and in a way that it deals with pervasive environmental and contextual software related system aspects. One pervasive campus case study is introduced to illustrate the MHS methodology that supports modularity of context-aware system design and is applicable in different pervasive environments

关键词： Design methodology Pervasive computing Object oriented modeling Guidelines Software systems Context modeling Context-aware services computer architecture Conferences Collaborative software

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Design of a simulation of atmospheric sunbeams

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WSEAS Transactions on computers 2006年第10期5卷 2466-2471页

作者： Hura, Joseph Hall, Richard Dept. of Computer Science and Engineering La Trobe University Melbourne VIC 3086 Australia

computer graphics researchers have made significant progress in modelling clouds and light. However, for a model of atmospheric sunbeams to have any pseudo-physical basis, it is necessary for these two classes of models to interact. In this paper we review each of these classes and design a model for offline rendering of sunbeams. Applications could include photorealistic rendering of outdoor scenes for computer generated movies using high-performance computing.

关键词： computer aided design

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Recognition of articulated robots in the RoboCup domain

Recognition of articulated robots in the RoboCup domain

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作者： Cinque, Luigi Sangineto, Enver Tanimoto, Steven Computer Science Department University of Rome La Sapienza via Salaria 113 00198 Rome Italy Department of Computer Science and Engineering University of Washington Seattle WA 98195 United States

This paper presents a system for articulated object recognition. The system has been tested in the RoboCup domain (four-legged league), an international competition among autonomous dog-like robots playing soccer. Nevertheless, the proposed method does not depend on any specific domain, but is thought to be applicable to generic objects composed of rigid subparts linked by rotational and/or translational joints.

关键词： Mobile robots

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