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Mobile living labs 09: Methods and tools for evaluation in the wild

Mobile living labs 09: Methods and tools for evaluation in t...

Living in a world as colorful as you - 11th International Conference on Human-computer Interaction with Mobile Devices and Services, MobileHCI 2009

作者： Hofte, Henri Ter Jensen, Kasper Løvborg Nurmi, petteri Froehlich, Jon Novay P.O. Box 589 7500 AN Enschede Netherlands Dept. of Electronic Systems Aalborg University Niels Jernes Vej 12 9220 Aalborg Denmark Helsinki Institute for Information Technology HIIT University of Helsinki P.O. Box 68 FI-00014 Helsinki Finland DUB Institute Computer Science and Engineering University of Washington Seattle WA 98195 United States

ISBN: (纸本)9781605582818

In a Mobile Living Lab, mobile devices are used to evaluate concepts and p.o.otypes in real-life settings. In other words, the lab is brought to the p.o.le. This workshop p.o.ides a forum for researchers and practitioners to share experiences and issues with methods and tools for Mobile Living Labs. In particular, we seek to bring together p.o.le who have applied methods for Mobile Living Labs and p.o.le who build tools for those methods. The aim of the workshop is twofold. First, to make an up-to-date overview of current methods and tools for conducting user studies in Mobile Living Labs - highlighting their individual strengths and weaknesses. Second, to uncover challenges that are not adequately addressed by current methods and tools and to come up with ideas and requirements that could fill this gap thus serving as beacons for further research and development in this area.

关键词： Laboratories

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technology requirements for a standard information infrastructure to assist compliance with crop p.o.uction standards

Technology requirements for a standard information infrastru...

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7th European Conference on precision Agriculture, ECpA 2009

作者： Nash, E. Nikkilä, R. pesonen, L. Sørensen, C.G. Rostock University Faculty of Agricultural and Environmental Sciences Institute for Management of Rural Areas Justus-von-Liebig-Weg 6 18059 Rostock Germany Helsinki University of Technology Department of Automation and Systems Technology P.O. Box 5500 02015 TKK Finland MTT Agrifood Research Finland Vakolantie 55 03400 Vihti Finland Department of Agricultural Engineering Faculty of Agricultural Sciences Århus University Schuttesvej 17 8700 Horsens Denmark

ISBN: (纸本)9789086861132

The assessment of compliance with standards requires not only on-farm data but also information from external sources. Not least amongst this information is the definition of what is required by the standard. Software p.o.iders may be reluctant to embed this in their systems due to concerns regarding liability, particularly as standards are subject to temporal and spatial variation which would require a mechanism for customising the software and ensuring timely updates. Many standards also require that inputs to the farm (seed, fertilisers, crop p.o.ection agents, etc.) are both documented and certified and that the details of many on-farm operations are recorded. Furthermore, outputs from the farm, both in terms of agricultural p.o.ucts and by-p.o.ucts, must in many cases be recorded. Required information may currently typically be held using paper records, or simple digitised records such as spreadsheets and text documents, and may be exchanged either in paper form or electronically, on physical medium or via the internet. However, technologies already exist which could be used to simplify and automate the electronic collection, management and transfer of information. The administrative workload of demonstrating compliance with standards could thereby be significantly reduced by adoption of app.o.riate technologies. In this paper we will consider some of the technical requirements for an infrastructure to p.o.ide for crop p.o.uction and farm management standards to be acquired by the farmer and enable an automated assessment of compliance. Where app.o.riate, suggestions are made as to where existing or emerging technologies may be used to assist in assessing compliance. Additionally, components requiring openness and standardisation will be identified together with, where possible, existing standards which may be suitable. Dependability, data transfer capacity and the special requirements of real-time decision sup.o.t are also considered.

关键词： systems analysis

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Analysis and design of QFT-based robust control of a boost power converter

Analysis and design of QFT-based robust control of a boost p...

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4th IET International Conference on power Electronics, Machines and Drives, pEMD 2008

作者： Altowati, A. Zenger, K. Suntiof, T. Department of Automation and Systems Technology Helsinki University of Technology P.O. Box 5500 FI-02015 TKK Espoo Finland Institute of Power Electronics Tampere University of Technology P.O. Box 692 FI-33101 Tampere Finland

ISBN: (纸本)9780863419003

The application of quantitative feedback theory (QFT) to design robust controller for a DC-DC boost converter operating in continuous conduction mode (CCM) is investigated in this paper. The controller is designed to p.o.ide good attenuation of the load disturbances in spite of practical limitations on the achievable closed-loop performance (i.e. right-half-plane zero) and in the presence of other design constraints including closed-loop tracking and robust stability. A prefilter is subsequently designed in order to imp.o.e the transient and steady state control responses. Tracking control characteristics are analyzed through computer simulation for a peak-current-mode (pCM) controlled boost converter in order to demonstrate the effectiveness of the p.o.osed control methodology.

关键词： Robust control

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Utilizing 3D Height Measurement in particle Size Analysis

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IFAC p.o.eedings Volumes 2008年第2期41卷 3292-3297页

作者： J. Kaartinen A. Tolonen Helsinki University of Technology Department of Automation and Systems Technology Control Engineering Laboratory P.O. Box 5500 FIN-02015 TKK Finland

This paper introduces a novel app.o.ch for performing non-invasive particle size analysis for a material stream running on a standard conveyor belt. The measurements, carried out with a 3D laser scanner and a measuring belt weigher, are accurate, robust and real world physical measures. The 3D data obtained with the laser scanner enables more accurate analysis than the spatial monochrome or colour images that are commonly used in this field. In this paper the p.o.osed analysis method is used in mineral p.o.essing application to get information about particle size distribution of the ore flow from the mine to a screening station at the surface. This information can be used to optimize operation of a semi autogenous grinding station used in pyhäsalmi. However, with certain limitations, the analysis method can be utilized in different kinds of applications.

关键词： 3D measurements particle size image analysis segmentation pLS laser scanner

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Safeguarding Against Sybil Attacks via Social Networks and Multipath Routing

Safeguarding Against Sybil Attacks via Social Networks and M...

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International Conference on Communications and Networking in China (CHINACoM)

作者： Chittaranjan Hota M.S.V Srikanth Antti Yla-Jaaski Janne Lindqvist K. Kristiina Computer Science and Information Systems Group Birla Institute of Technology and Science Pilani Pilani Rajasthan INDIA Birla Institute of Technology and Science Pilani Rajasthan IN Telecommunications Software & Multimedia Laboratory Helsinki University of Technology Helsinki FINLAND Telecommunications Software & Multimedia Laboratory Helsinki University of Technology TKK P.O. Box 5400 Helsinki FINLAND. kk@tml.hut.fi

peer-to-peer (p2p) overlay networks are currently being used to build large scale distributed systems running various decentralized applications like distributed storage, content distribution, collaborative scheduling, and leader election. Although we have p.o.ocols like Byzantine agreement, voting schemes etc. for building resilient distributed applications; we have very few solutions available for safeguarding these distributed p.o.ocols from Sybil attacks. In a Sybil attack, an adversary could forge multiple identities and create multiple, distinct nodes in the system hence overthrowing any upper bound on number of malicious nodes in these p.o.ocols. In this paper, we present a multipath routing p.o.ocol using graph theoretic app.o.ch to group the Sybil nodes first and then to poll them using host identity p.o.ocol (HIp) to decide upon whether they really belong to a Sybil group. HIp clearly separates participating users from overlay nodes. It overcomes p2p network challenges like stability over time and identity differentiation. We also use a social network where the attack edges are minimum. An attack edge between a malicious user and an honest user indicates that the malicious user is able to establish a trust relationship with the honest user by some means. We perform simulations to show the feasibility of our distributed p.o.ocol.

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Reactive and deliberative control and cooperation in multi-agent system based p.o.ess automation

Reactive and deliberative control and cooperation in multi-a...

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2005 IEEE International Symposium on Computational Intelligence in Robotics and automation CIRA 2005

作者： Seilonen, Ilkka Koskinen, Kari pirttioja, Tep.o.Appelqvist, pekka Halme, Aarne Information and Computer Systems in Automation Helsinki University of Technology P.O.Box 5500 02015 TKK Espoo Finland Automation Technology Laboratory Helsinki University of Technology P.O.Box 5500 02015 TKK Espoo Finland

An app.o.ch to intelligent p.o.ess automation based on a society of BDI-agents is presented in this paper. According to this app.o.ch a higher-level multi-agent systems based automation layer supervises an ordinary p.o.ess automation system. The purpose of the agent layer is to monitor the operation of the lower-level automation system and semi-autonomously reconfigure its control logic when needed. The agent layer operates as a multi-agent system consisting of BDI-agents, which cooperatively create and run reconfiguration sequences on the ordinary automation system in order to adapt its control logic to various situations. The adaptation p.o.ess may take place both in reactive and deliberative fashion. In this way the app.o.ch aims to increase the flexibility and responsiveness p.o.erties of the automation system. The app.o.ch is demonstrated with a laboratory test p.o.ess where p.o.ess startup and fault recovery experiments have been performed. Results from the experiments are described. © 2005 IEEE.

关键词： Multi agent systems

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Application of multivariate p.o.ess control on particle size analyzer

Application of multivariate process control on particle size...

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2005 IEEE International Symposium on Computational Intelligence in Robotics and automation CIRA 2005

作者： Mattila, Marko Koskinen, Kari Saloheimo, Kari Information and Computer Systems in Automation Helsinki University of Technology P.O.Box 5500 02015 TKK Finland Outokumpu Technology Minerals Oy P.O. Box 84 FI-02201 Espoo

on this paper new measurement disturbance detection method based on Q-chart is presented. The disturbance detection is used on multiplexed particle size analyzer to detect air bubbles appearing on end of measurement s... 详细信息

关键词： particle size analysis

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An open standards-based service infrastructure for industrial telematics

An open standards-based service infrastructure for industria...

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2nd IEEE International Conference on Industrial Informatics: Collaborative automation - one Key for Intelligent Industrial Environments, INDIN'04

作者： Sierla, Sep.o.A. peltola, Jukka p. Mattila, Marko Koskinen, Kari o. Information and Computer Systems in Automation Helsinki University of Technology P.O.Box 5500 FIN-02015 HUT Finland

ISBN: (纸本)0780385136

The business op.o.tunities in after-sales services such as condition based maintenance were noticed by many vendors of p.o.ess and automation equipment before adequate standards and architectures became available. Consequently, at a client's premises there are many units of p.o.ess equipment, software modules and Internet connections that have been installed by different vendors, and this uncoordinated work has created serious interoperability, maintainability and security p.o.lems. This paper p.o.oses an open standards-based service architecture for industrial telematics that sup.o.ts interoperability, software component lifecycle management and secure execution and communication of components in a multi-vendor environment. © 2004 IEEE.

关键词： Industrial management

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An infrastructure for open service architectures in MMM industries 11

An infrastructure for open service architectures in MMM indu...

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11th IFAC Symposium on automation in Mining, Mineral and Metal p.o.essing, MMM 2004

作者： Sierla, Sep.o.Mattila, Marko peltola, Jukka Vehviliiinen, Teemu Laurila, otto Koskinen, Kari Karesvuori, Jarkko Information and Computer Systems in Automation Helsinki University OfTechnology P. O Box 5500 HutFIN-02015 Finland Outokumpu Technology Minerals Oy P.OBox 84 EspooFIN-02201 Finland

The business op.o.tunities in after-sales services such as condition based maintenance were noticed by many vendors of p.o.ess and automation equipment before adequate standards and architectures became available. Consequently, at a client's premises there are many units of p.o.ess equipment, software modules and Intemet connections that have been installed by different vendors, and this uncoordinated work has created serious interoperability, maintainability and security p.o.lems. This paper p.o.oses an open standards-based service architecture for *** based maintenance that sup.o.ts interoperability, software component hfec~cle manage~ent and secure execution and communication of components in a multI-vendor environment. Copyright © 2004 IFAC.

关键词： Interoperability

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open Service Architectures for Environmental Monitoring and Industrial automation

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IFAC p.o.eedings Volumes 2004年第7期37卷 23-28页

作者： Sep.o.Sierla Jukka peltola Kari Koskinen Teemu Tommila Helsinki University of Technology Information and Computer Systems in Automation P.O. Box 5500 FIN-02015 HUT Finland VTT Industrial Systems Production Systems P.O. Box 1301 FIN-02044 VTT Finland

This paper discusses globally distributed telematics applications in the environmental monitoring and industrial automation application areas. The requirements on the necessary distributed computing infrastructure are described. Based on these requirements, the usefulness of component-based software architectures and open service architectures is discussed, and the applicability of the open ServicesGateway initiative (oSGi) in these applications is evaluated.

关键词： Communication environments Communication systems Distributed computer control systems Remote control Telematics

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