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  • 101.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Doganay, Kivanc
    RISE., Swedish ICT, SICS.
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Steinert, Rebecca
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Wärja, Mathias
    A Tool for Gas Turbine Maintenance Scheduling2009Ingår i: Proceedings of the Twenty-First Conference on Innovative Applications of Artificial Intelligence (IAAI'09), IEEE Computer Society , 2009, 20Konferensbidrag (Refereegranskat)
    Abstract [en]

    We describe the implementation and deployment of a software decision support tool for the maintenance planning of gas turbines. The tool is used to plan the maintenance for turbines manufactured and maintained by Siemens Industrial Turbomachinery AB (SIT AB) with the goal to reduce the direct maintenance costs and the often very costly production losses during maintenance downtime. The optimization problem is formally defined, and we argue that feasibility in it is NP-complete. We outline a heuristic algorithm that can quickly solve the problem for practical purposes, and validate the approach on a real-world scenario based on an oil production facility. We also compare the performance of our algorithm with results from using mixed integer linear programming, and discuss the deployment of the application. The experimental results indicate that downtime reductions up to 65% can be achieved, compared to traditional preventive maintenance. In addition, using our tool is expected to improve availability with up to 1% and reduce the number of planned maintenance days with 12%. Compared to a mixed integer programming approach, our algorithm not optimal, but is orders of magnitude faster and produces results which are useful in practice. Our test results and SIT AB’s estimates based on operational use both indicate that significant savings can be achieved by using our software tool, compared to maintenance plans with fixed intervals.

  • 102.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Doganay, Kivanc
    RISE., Swedish ICT, SICS.
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Steinert, Rebecca
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Wärja, Mathias
    Searching for Gas Turbine Maintenance Schedules2010Ingår i: AI Magazine, Vol. 31, nr 1, s. 21-36Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Preventive maintenance schedules occurring in industry are often suboptimal with regard to maintenance coal-location, loss-of-production costs and availability. We describe the implementation and deployment of a software decision support tool for the maintenance planning of gas turbines, with the goal of reducing the direct maintenance costs and the often costly production losses during maintenance downtime. The optimization problem is formally defined, and we argue that the feasibility version is NP-complete. We outline a heuristic algorithm that can quickly solve the problem for practical purposes and validate the approach on a real-world scenario based on an oil production facility. We also compare the performance of our algorithm with results from using integer programming, and discuss the deployment of the application. The experimental results indicate that downtime reductions up to 65% can be achieved, compared to traditional preventive maintenance. In addition, the use of our tool is expected to improve availability with up to 1% and reduce the number of planned maintenance days by 12%. Compared to a integer programming approach, our algorithm is not optimal, but is much faster and produces results which are useful in practice. Our test results and SIT AB’s estimates based< on operational use both indicate that significant savings can be achieved by using our software tool, compared to maintenance plans with fixed intervals.

  • 103.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ekman, Jan
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    The opportunistic replacement and inspection problem for components with a stochastic life time2011Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The problem of finding efficient maintenance and inspection schemes in the case of components with a stochastic life time is studied and a mixed integer programming solution is proposed. The problem is compared with the two simpler problems of which the studied problem is a generalisation: The opportunistic replacement problem, assuming components with a deterministic life time and The opportunistic replacement problem for components with a stochastic life time, for maintenance schemes without inspections.

  • 104.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Forsgren, Malin
    RISE - Research Institutes of Sweden, ICT, SICS.
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Levin, Björn
    RISE - Research Institutes of Sweden, ICT, SICS.
    Aronsson, Martin
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Steinert, Rebecca
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Reducing vehicle maintenance using condition monitoring and dynamic planning2008Ingår i: Proceedings of the 4th IET International Conference on Railway Condition Monitoring (RCM'08), 2008, 1Konferensbidrag (Refereegranskat)
  • 105.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ekman, Jan
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Sellin, Ola
    Lindström, Björn
    Larsen, Stefan
    Statistical Anomaly Detection for Train Fleets2012Konferensbidrag (Refereegranskat)
  • 106.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Kocjan, Waldemar
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Designing Global Scheduling Constraints for Local Search: A Generic Approach2002Rapport (Övrigt vetenskapligt)
    Abstract [en]

    In this work we present a novel method to automate the computation of global constraints cost for local search. The method is based on the representation of a global constraints as graph properties on a binary constraint network. This formulation simplifies the implementation of global constraints in local search, and provides a cost that can be readily compared to one obtained for subproblems using binary constraints exclusively. The cost obtained can be efficiently updated during the search using incremental methods. The representation of a global constraint as outlined above can also be used for generation of suitable neighborhoods for the constraint. This is done using simple repair functions applied on the elementary constraints in the global constraint graph. We show the usability of our approach by presenting formulations of global constraints in non-overlapping and cumulative scheduling.

  • 107.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Aronsson, Martin
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Forsgren, Malin
    RISE - Research Institutes of Sweden, ICT, SICS.
    Ansatser för flexibel planering och schemaläggning av tågtidtabeller2006Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    Rapporten beskriver möjliga ansatser för att lösa det abstraherade tidtabellproblemet som bl.a. diskuteras i rapporten "Leveranstågplan: Specifikation och åtagande" (DDTP Arbetsdokument SICS-DDTP-002). Till grund för de olika ansatserna ligger en modell med avgångstider och hålltider (dvs. väntetider och i viss mån traverseringstider) som tillåts variera inom vissa tidsintervall. Huvudidén är att arbeta med förenklade kapacitetsvillkor på bana och bangård, för att på ett effektivt sätt kunna beräkna tidtabeller på en nivå som tillåter anpassning av tidtabellen till det gällande transportbehovet och den rådande trafiksituationen.

  • 108.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Lu, Yue
    Kraft, Johan
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Nolte, Thomas
    Best-Effort Simulation-Based Timing Analysis using Hill-Climbing with Random Restarts2009Ingår i: Proceedings of the 15th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, IEEE Computer Society , 2009, 6Konferensbidrag (Refereegranskat)
  • 109.
    Bohlin, Markus
    et al.
    RISE - Research Institutes of Sweden, ICT, SICS.
    Wärja, Mathias
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Slottner, Pontus
    Doganay, Kivanc
    RISE., Swedish ICT, SICS.
    Optimization of Condition-Based Maintenance for Industrial Gas Turbines: Requirements and Results2009Konferensbidrag (Refereegranskat)
  • 110.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Artificial agent action in markets2001Ingår i: Electronic Commerce Research, ISSN 1389-5753, E-ISSN 1572-9362, Vol. 1, nr 1-2, s. 159-168Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We summarise our experiences of a number of demonstrators and simulation experiments designed to test the feasibility of using artificial decision making agents in real-time domains, and comment on the significance of our results to autonomous artificial agent action patterns in markets. Our main hypothesis is that the use of norms can extend the capability of artificial decision makers beyond what is obtained from implementing individual utility maximisers in keeping with rational choice theory.

  • 111.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    On Understanding Catastrophe — The Case of Highly Severe Influenza-Like Illness2011Konferensbidrag (Refereegranskat)
    Abstract [en]

    Computational epidemiology is a form of spatiotemporal reasoning in which social link structures are employed, and spatially explicit models are specified and executed. We point to issues thus far addressed neither by engineers, nor scientists, in the light of a use case focusing on catastrophic scenarios that assume the emergence of a highly unlikely but lethal and contagious strain of influenza. Our conclusion is that important perspectives are missing when dealing with policy issues resulting from scenario execution and analyses in computational epidemiology.

  • 112.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Speedwriting in Networked Foresight2014Konferensbidrag (Refereegranskat)
  • 113.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    The joy of mesh2008Ingår i: British Medical JournalArtikel i tidskrift (Refereegranskat)
  • 114.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Trading agents2001Ingår i: AgentLink News, ISSN 1465-3842, Vol. 6, s. 15-17Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
  • 115.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Who Were Where When? On the Use of Social Collective Intelligence in Computational Epidemiology2014Ingår i: Social Collective Intelligence, Switzerland: Springer , 2014, 9, s. 203-225Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    A triangular (case, theoretical, and literature) study approach is used to investigate if and how social collective intelligence is useful to computational epidemiology. The hypothesis is that the former can be employed for assisting in converting data into useful information through intelligent analyses by deploying new methods from data analytics that render previously unintelligible data intelligible. A conceptual bridge is built between the two concepts of crowd signals and syndromic surveillance. A concise list of empirical observations supporting the hypothesis is presented. The key observation is that new social collective intelligence methods and algorithms allow for massive data analytics to stay with the individual, in micro. It is thus possible to provide the analyst with advice tailored to the individual and with relevant policies, without resorting to macro (statistical) analyses of homogeneous populations.

  • 116.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Bylund, Markus
    RISE - Research Institutes of Sweden, ICT, SICS.
    Espinoza, Fredrik
    RISE., Swedish ICT, SICS.
    Trading agents for roaming users2002Konferensbidrag (Refereegranskat)
  • 117.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Espinoza, Fredrik
    RISE., Swedish ICT, SICS.
    Franzén, Kristofer
    RISE., Swedish ICT, SICS.
    Hansen, Preben
    RISE., Swedish ICT, SICS.
    Bylund, Markus
    RISE - Research Institutes of Sweden, ICT, SICS.
    Svensson, Martin
    RISE., Swedish ICT, SICS.
    Human Grid: En förstudie2007Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    Vi har granskat förutsättningarna och möjligheterna att implementera Human Grid: en så kallad mellanprogramvara för att integrera samarbetsfrämjande IT-lösningar som redan idag finns i datorer och telefoner, med hänsyn tagen till formella och informella sociala nätverk.

  • 118.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ghaffar, Asim
    Liljeros, Fredrik
    Stenhem, Mikael
    Social network visualization as a contract tracing tool2006Konferensbidrag (Refereegranskat)
    Abstract [en]

    Something many pathogens have in common is the requirement for tracing their spread under harsh time constraints, posing a so-called contact tracing (or ``race-to-trace'') problem. We present a tool for visualizing contact networks, an important step towards practical use by epidemiologists, which generates interactive three-dimensional (3D) network visualizations. Its general purpose visualization engine can support multiple applications and varying pathogens. The main purpose is to trace, in the case of an outbreak, contacts among individuals known to have been at the same place.

  • 119.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Gillblad, Daniel
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Learning machines for computational epidemiology2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    Resting on our experience of computational epidemiology in practice and of industrial projects on analytics of complex networks, we point to an innovation opportunity for improving the digital services to epidemiologists for monitoring, modeling, and mitigating the effects of communicable disease. Artificial intelligence and intelligent analytics of syndromic surveillance data promise new insights to epidemiologists, but the real value can only be realized if human assessments are paired with assessments made by machines. Neither massive data itself, nor careful analytics will necessarily lead to better informed decisions. The process producing feedback to humans on decision making informed by machines can be reversed to consider feedback to machines on decision making informed by humans, enabling learning machines. We predict and argue for the fact that the sensemaking that such machines can perform in tandem with humans can be of immense value to epidemiologists in the future.

  • 120.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Holm, Einar
    Multi-agent systems, time geography, and microsimulations2004Ingår i: Systems Approaches and Their Application, Kluwer , 2004, 1, , s. 340s. 95-118Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    In this chapter we consider the role virtual conferencing has to play in realising a successful Inhabited Information Space (IIS). For any IIS to be successful it needs to weave together many different constituent elements and present these in a coherent and seamless manner. For example, Maher et al (2000) describe how many different components are used together to create a virtual design studio for architectural collaboration. For the IIS to function all the elements must work both individually and collectively. Communication is one of the basic building blocks for an IIS, and can be in many modes across many media. Approaches to virtual conferencing offer support for communication across a number of media and can be utilised in an IIS. These approaches are also starting to additionally offer support for collaboration. By providing an introduction to and overview of various possibilities for virtual conferencing we aim to show how these solutions can provide the required and appropriate support for communication and collaboration between inhabitants in a shared information space. Of course virtual conferencing solutions exist at many levels of sophistication and fidelity. Communication media can range from text through 3d graphics to video representations. The aim of this chapter is to present these many and varied possibilities, drawing on the experience of the author as well as insights into the past, present and future. In this way it is possible to see how diverse a range of IISes can make use of virtual conferencing functionality.

  • 121.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Johansson, Stefan J.
    Modeling Epidemic Spread in Synthetic Populations - Virtual Plagues in Massively Multiplayer Online Games2007Konferensbidrag (Refereegranskat)
    Abstract [en]

    A virtual plague is a process in which a behavior-affecting property spreads among characters in a Massively Multiplayer Online Game (MMOG). The MMOG individuals constitute a synthetic population, and the game can be seen as a form of interactive executable model for studying disease spread, albeit of a very special kind. To a game developer maintaining an MMOG, recognizing, monitoring, and ultimately controlling a virtual plague is important, regardless of how it was initiated. The prospect of using tools, methods and theory from the field of epidemiology to do this seems natural and appealing. We will address the feasibility of such a prospect, first by considering some basic measures used in epidemiology, then by pointing out the differences between real world epidemics and virtual plagues. We also suggest directions for MMOG developer control through epidemiological modeling. Our aim is understanding the properties of virtual plagues, rather than trying to eliminate them or mitigate their effects, as would be in the case of real infectious disease.

  • 122.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Johansson, Stefan
    Lybäck, David
    Parrondo strategies for artificial traders2001Ingår i: Intelligent Agent Technology, World Scientific, 2001, 1, , s. 10s. 150-159Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    On markets with receding prices, artificial noise traders may consider alternatives to buy-and-hold. By simulating variations of the Parrondo strategy, using real data from the Swedish stock market, we produce first indications of a buy-low-sell-random Parrondo variation outperforming buy-and-hold. Subject to our assumptions, buy-low-sell-random also outperforms the traditional value and trend investor strategies. We measure the success of the Parrondo variations not only through their performance compared to other kinds of strategies, but also relative to varying levels of perfect information, received through messages within a multi-agent system of artificial traders.

  • 123.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Laaksolahti, Jarmo
    RISE., Swedish ICT, SICS, Computer Systems Laboratory.
    Espinoza, Fredrik
    RISE - Research Institutes of Sweden, ICT, SICS.
    Cöster, Rickard
    RISE - Research Institutes of Sweden, ICT, SICS.
    Trust in Micro Service Environments2006Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Report produced in the project Enabling and Promoting Trust in Micro Service Environments (EPTMSE) with a web site at www.trust-eze.org. The report gives an overview of the concept of trust in domains such as psychology, sociology, philosophy, and computer science, and then describes the current domain of Micro Service Environments - open and unregulated electronic service environments - where users can create, use, and share electronic services, and where the need for decentralized trust mechanisms is high. Some design and implementation choices and solutions for trust mechanisms are suggested.

  • 124.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab. KTH Royal Institute of Technology, Sweden.
    Sanches, Pedro
    RISE., Swedish ICT, SICS.
    Sensemaking in Intelligent Health Data Analytics2015Ingår i: Künstliche Intelligenz, ISSN 0933-1875, E-ISSN 1610-1987, Vol. 29, nr 2, s. 143-152Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A systemic model for making sense of health data is presented, in which networked foresight complements intelligent data analytics. Data here serves the goal of a future systems medicine approach by explaining the past and the current, while foresight can serve by explaining the future. Anecdotal evidence from a case study is presented, in which the complex decisions faced by the traditional stakeholder of results—the policymaker—are replaced by the often mundane problems faced by an individual trying to make sense of sensor input and output when self-tracking wellness. The conclusion is that the employment of our systemic model for successful sensemaking integrates not only data with networked foresight, but also unpacks such problems and the user practices associated with their solutions.

  • 125.
    Boman, Magnus
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Sandin, Anna
    Implementing an agent trade server2004Ingår i: Decision Support Systems, ISSN 0167-9236, E-ISSN 1873-5797Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    An experimental server for stock trading autonomous agents is presented and made available, together with an agent shell for swift development. The server, written in Java, was implemented as proof-of-concept for an agent trade server for a real financial exchange.

  • 126. Borg Gyllenbäck, Katarina
    et al.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Narrative Bridging2011Ingår i: Design Computing and Cognition '10, Springer , 2011, 7, s. 525-544Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    In the design of interactive media, various forms of intuitive practice come into play. It might prove tempting to use templates and strong narrative structures from film, instead of developing the narrative directly for interactive media, leading to a move towards computer implementation too swiftly. The narrative bridging method focuses on the initial design phase, in which the conceptual modeling takes place. The purpose is to provide designers with a non-intrusive method that aids the design without interfering with creativity. The method supports the sentient construction of digital games with a narrative, with the ultimate goal of enhancing the player’s experience. A prototype test served as a first evaluation, and two games from that test are showcased here for the purpose of illustrating the hands-on use of narrative bridging. The test demonstrated that the method could aid time-constrained design, and in the process detect inconsistencies that could prevent the design team from making improvements. The method also provided teams with a shared vocabulary and outlook.

  • 127. Boujemaa, Nozha
    et al.
    Compañó, Ramón
    Dosch, Christoph
    Geurts, Joost
    Kompatsiaris, Yiannis
    Karlgren, Jussi
    RISE., Swedish ICT, SICS.
    King, Paul
    Köhler, Joachim
    Le Moine, Jean-Yves
    Ortgies, Robert
    Point, Jean-Charles
    Rotenberg, Boris
    Rudström, Åsa
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Sebe, Nicu
    CHORUS Deliverable 2.1: State of the Art on Multimedia Search Engines2007Övrigt (Övrigt vetenskapligt)
    Abstract [en]

    Based on the information provided by European projects and national initiatives related to multimedia search as well as domains experts that participated in the CHORUS Think-thanks and workshops, this document reports on the state of the art related to multimedia content search from, a technical, and socio-economic perspective. The technical perspective includes an up to date view on content based indexing and retrieval technologies, multimedia search in the context of mobile devices and peer-to-peer networks, and an overview of current evaluation and benchmark inititiatives to measure the performance of multimedia search engines. From a socio-economic perspective we inventorize the impact and legal consequences of these technical advances and point out future directions of research.

  • 128. Brouwers, Lisa
    et al.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    A Computational Agent Model of Flood Management Strategies2011Ingår i: Computational Methods Applied to Agricultural Research: Advances and Applications, IGI Global , 2011, 7, s. 296-307Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    A geographically explicit flood simulation model was designed and implemented as a tool for policy making support, illustrated here with two simple flood management strategies pertaining to the Upper Tisza area in Hungary. The model integrates aspects of the geographical, hydrological, economical, land use, and social context. The perspectives of different stakeholders are represented as agents that make decisions on whether or not to buy flood insurance. We demonstrate that agent-based models can be important for policy issues in general, and for sustainable development policy issues in particular, by aiding stakeholder communication and learning, thereby increasing the chances of reaching robust decisions. The agent-based approach enables the highlighting and communication of distributional effects of policy changes at the micro-level, as illustrated by several graphical representations of outputs from the model.

  • 129. Brouwers, Lisa
    et al.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Camitz, Martin
    Mäkelä, Kalle
    Tegnell, Anders
    Micro-Simulation of a Smallpox Outbreak using Official Register Data2010Ingår i: Eurosurveillance, Vol. 15Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    To explore the efficacy of four vaccine-based policy strategies (ring vaccination, targeted vaccination, mass vaccination, and pre-vaccination of health care personnel combined with ring vaccination) for controlling smallpox outbreaks in Sweden, disease transmission on a spatially explicit social network was simulated. The mixing network was formed from highcoverage official register data of the entire Swedish population, building on the Swedish Total Population Register, the Swedish Employment Register, and the Geographic Database of Sweden. The largest reduction measured in the number of infections was achieved when combining ring vaccination with a pre-vaccination of health care personnel. In terms of per dose effectiveness, ring vaccination was by far the most effective strategy. While unsurprising, the results can to some extent be adapted to other diseases and environments, including other countries, and the methodology employed can be analysed in its own right. The mixing networks and other intrinsic structures generated with the help of the model could prove useful to a larger class of problems within policy making, for example.

  • 130. Brunner, Marcus
    et al.
    Galis, Alex
    Cheng, Lawrence
    Colas, Jorge Andres
    Ahlgren, Bengt
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Gunnar, Anders
    RISE., Swedish ICT, SICS.
    Abrahamsson, Henrik
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Szabo, Robert
    Csaba, Simon
    Nielsen, Johan
    Schuetz, Simon
    Prieto, Alberto Gonzalez
    Stadler, Rolf
    Molnar, Gergely
    Towards Ambient Networks Management2005Ingår i: IEEE MATA 2005 Second International Workshop on Mobility Aware Technologies and Applications, 2005, 1Konferensbidrag (Refereegranskat)
  • 131. Brunner, Marcus
    et al.
    Gunnar, Anders
    RISE., Swedish ICT, SICS.
    Abrahamsson, Henrik
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Ambient Networks Management Challenges and Approaches2004Ingår i: IEEE MATA 2004 1st International Workshop on Mobility Aware Technologies and Applications, 2004, 2Konferensbidrag (Refereegranskat)
  • 132.
    Cakici, Baki
    et al.
    RISE., Swedish ICT, SICS.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    A Workflow for Software Development within Computational Epidemiology2011Ingår i: Journal of Computational Sciences, Vol. 2, s. 216-222Artikel i tidskrift (Refereegranskat)
  • 133. Camitz, Martin
    et al.
    Brouwers, Lisa
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Tegnell, Anders
    Cakici, Baki
    RISE., Swedish ICT, SICS.
    Economic consequences to society of pandemic H1N1 influenza 2009: preliminary results for Sweden2009Ingår i: Eurosurveillance, ISSN 1025-496X, E-ISSN 1560-7917, Vol. 14, nr 37Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Experiments using a microsimulation platform show that vaccination against pandemic H1N1 influenza is highly cost-effective. Swedish society may reduce the costs of pandemic by about SEK 2.5 billion (approximately EUR 250 million) if at least 60 per cent of the population is vaccinated, even if costs related to death cases are excluded. The cost reduction primarily results from reduced absenteeism. These results are preliminary and based on comprehensive assumptions about the infectiousness and morbidity of the pandemic, which are uncertain in the current situation.

  • 134.
    Carlsson, Mats
    et al.
    RISE., Swedish ICT, SICS, Computer Systems Laboratory.
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Åström, Emil
    RISE - Research Institutes of Sweden, ICT, SICS.
    Constraint-based resource allocation and scheduling in steel manufacturing1999Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper describes a flow maximization problem in steel manufacturing, decomposes it into three sub-problems, and models them in terms of finite domain constraints. Greedy algorithms are used for solving the sub-problems. The constraints are used for maintaining consistency rules, not for optimization. A tool implementing these algorithms and equipped with a GUI has been implemented.

  • 135. Chalmers, Matthew
    et al.
    Dieberger, Andreas
    Höök, Kristina
    RISE., Swedish ICT, SICS.
    Rudström, Åsa
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Social Navigation and Seamful Design2004Ingår i: Cognitive Studies: Bulletin of the Japanese Cognitive Science Society, Vol. 11, s. 171-181Artikel i tidskrift (Refereegranskat)
  • 136. Chong, May Yee
    et al.
    Bjurling, Björn
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Dantas, Ramide
    Kamienski, Carlos
    Ohlman, Börje
    Goal-based service creation using autonomic entities2009Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents an approach for facilitating the setting-up and management of new multi-organizational telecom services. We are addressing factors that currently impede the development of new complex telecom services. One factor is the gap between high-level business goals and low-level network management policies making it hard for business managers to quickly implement new business ideas. A second factor, due to the trends towards outsourcing and multi-organizational structures, is the increasing complexity of the services which leads to high demands on the management environments. These factors translate into high costs and long time-to-market for the introduction of new complex telecom services. As a suggestion for a solution to these issues, we propose a goal-based approach towards self-management of complex telecom services. In our suggestion lies a new breed of network devices called Autonomic Entities which should be able both to orchestrate services fulfilling given goals, and to refine and combine goals for the purpose of self-management. This paper focuses on how Autonomic Entities can be combined via a goal combining method for the creation of new services. Our approach is illustrated with examples and an application to a scenario.

  • 137.
    Cöster, Rickard
    et al.
    RISE., Swedish ICT, SICS.
    Gustavsson, Andreas
    Olsson, Tomas
    RISE., Swedish ICT, SICS.
    Rudström, Åsa
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Enhancing Web-Based Configuration with Recommendations and Cluster-Based Help2002Konferensbidrag (Refereegranskat)
  • 138. Dannewitz, Christian
    et al.
    Golić, Jovan
    Ohlman, Börje
    Ahlgren, Bengt
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Secure Naming for a Network of Information2010Konferensbidrag (Refereegranskat)
    Abstract [en]

    Several projects propose an information-centric approach to the network of the future. Such an approach makes efficient content distribution possible by making information retrieval host-independent and integrating into the network storage for caching information. Requests for particular content can, thus, be satisfied by any host or server holding a copy. The current security model based on host authentication is not applicable in this context. Basic security functionality must instead be attached directly to the data and its naming scheme. A naming scheme to name content and other objects that enables verification of data integrity as well as owner authentication and identification is here presented. The naming scheme is designed for flexibility and extensibility, e.g., to integrate other security properties like access control. At the same time, the naming scheme offers persistent IDs even though the content, content owner and/or owner’s organizational structure, or location change. The requirements for the naming scheme and an analysis showing how the proposed scheme fulfills them are presented. Experience with prototyping the naming scheme is also discussed. The naming scheme builds the foundation for a secure information-centric network infrastructure that can also solve some of the main security problems of today’s Internet.

  • 139. Dannewitz, Christian
    et al.
    Kutscher, Dirk
    Ohlman, Börje
    Farrell, Stephen
    Ahlgren, Bengt
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Karl, Holger
    Network of Information (NetInf) - An Information-Centric Networking Architecture2013Ingår i: Computer Communications, ISSN 0140-3664, E-ISSN 1873-703X, Vol. 36, s. 721-735Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Information-centric networking (ICN) is a promising approach to networking that has the potential to provide better -- more natural and more efficient -- solutions for many of today's important communication applications including but not limited to large-scale content distribution. This article describes the NetInf architecture -- a specific ICN approach that targets global-scale communication and supports many different types of networks and deployments, including traditional Internet access/core network configurations, data centers, as well as challenged and infrastructure-less networks. NetInf's approach to connecting different technology and administrative domains into a single information-centric network is based on a hybrid name-based routing and name resolution scheme. In this article, we describe the most important requirements that motivated the NetInf design. We present an architecture overview and discuss the different architecture elements such as naming, message forwarding, caching, and a NRS in detail. As efficient caching and a scalable NRS are two main success factors, we present an evaluation of both elements based on a theoretical analysis, complemental simulation results, and prototyping results. The results suggest that a scalable NRS for 10^15 and more objects with resolution latencies (well) below 100ms is possible, implying that a global NetInf that removes the need for today's application-specific overlay solutions is feasible.

  • 140. Davidsson, Paul
    et al.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Distributed monitoring and control of office buildings by embedded agents2005Ingår i: Information Sciences, ISSN 0020-0255, E-ISSN 1872-6291, Vol. 171, s. 293-307Artikel i tidskrift (Refereegranskat)
  • 141. Ekenberg, Love
    et al.
    Boman, Magnus
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Linnerooth-Bayer, Joanne
    General risk constraints2001Ingår i: Journal of Risk Research, ISSN 1366-9877, E-ISSN 1466-4461, Vol. 4, nr 1, s. 31-47Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The risk evaluation process is integrated with procedures for handling vague and numerically imprecise probabilities and utilities. A body of empirical evidence has shown that many managers would welcome new ways of highlighting catastrophic consequences, as well as means to evaluating decision situations involving high risks. When events occur frequently and their consequences are not severe, it is relatively simple to calculate the risk exposure of an organisation, as well as a reasonable premium when an insurance transaction is made, relying on variations of the principle of maximising the expected utility. When, on the other hand, the frequency of damages is low, the situation is considerably more difficult, especially if catastrophic events may occur. When the quality of estimates is poor, e.g., when evaluating low-probability/high-consequence risks, the customary use of quantitative rules together with unrealistically precise data could be harmful as well as misleading. We point out some problematic features of evaluations performed using utility theory and criticise the demand for precise data in situations where none is available. As an alternative to traditional models, we suggest a method that allows for interval statements and comparisons, which does not require the use of numerically precise statements of probability, cost, or utility in a general sense. In order to attain a reasonable level of security, and because it has been shown that managers tend to focus on large negative losses, it is argued that a risk constraint should be imposed on the analysis. The strategies are evaluated relative to a set of such constraints considering how risky the strategies are. The shortcomings of utility theory can in part be compensated for by the introduction of risk constraints.

  • 142.
    Ekman, Jan
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Capacity estimation of new infrastructure based on a discrete event model of train paths2004Ingår i: Computers in Railways IX: Computer Aided Design, Manufacture and Operation in the Railway and Other Advanced Mass Transit Systems (COMPRAIL 2004), Southampton, UK: WIT Press , 2004, 4, , s. 10s. 539-548Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    The paper presents an analytic method for estimating capacity for repeated traffic patterns on a railway section. The vision is to use the method as a basis for developing tools for infrastructure analysis that supports the process of designing infrastructure that meet the traffic needs. The idea underlying the method is that traffic patterns can be modelled as discrete event systems, where the events considered are associated with trains waiting for other trains. The Swedish National Rail Administration (Banverket) supports the research from which the presented ideas result.

  • 143.
    Ekman, Jan
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Kaban -- A tool for analysis of railway capacity2011Ingår i: WIT Transactions on Modelling and Simulation, ISSN 1746-4064, E-ISSN 1743-355X, s. 693-702Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The capacity analysis tool Kaban aims at being efficient for examining if planned infrastructure meets the expected need for railway capacity. Infrastructure, safety rules, signalling and traffic are all modelled in great detail in Kaban and hence the tool is a useful support for signalling design. The tool is also useful for finding out which routing and what train order suits existing or planned track layout. The idea of Kaban is that traffic patterns can be modelled as discrete event systems, with the minimum cycle time as a capacity measure. This measure answers the question if a certain timetable is possible at a station and tells how much buffer time there is. Kaban also presents results on what is critical for the capacity, aiming at explaining how to adjust to increase capacity. The GUI of Kaban displays the infrastructure and train paths and takes care of the user interaction. The development of Kaban is supported by the Swedish Transport Administration (Trafikverket).

  • 144.
    Ekman, Jan
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Towards useful tools for estimating railway infrastructure capacity2004Ingår i: ERCIM News, ISSN 0926-4981, E-ISSN 1564-0094, nr 56, s. 26-27Artikel i tidskrift (Övrigt vetenskapligt)
  • 145.
    Ekman, Jan
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Incremental stream clustering and anomaly detection2008Rapport (Övrigt vetenskapligt)
    Abstract [en]

    This report concerns the "ISC-tool", a tool for classification of patterns and detection of anomalous patterns, where a pattern is a set of values. The tool has a graphical user interface "the anomalo-meter" that shows the degree of anomaly of a pattern and how it is classified. The report describes the user interaction with the tool and the underlying statistical methods used, which basically are Bayesian inference for finding expected or "predictive" distributions for clusters of patterns and using these distributions for classifying and assessing a degree of anomaly to a new pattern. The report also briefly discusses what in general are appropriate methods for clustering and anomaly detection. The project has been supported by SSF via the Butler2 programme.

  • 146.
    Ekman, Jan
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Aronsson, Martin
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Bohlin, Markus
    RISE - Research Institutes of Sweden, ICT, SICS.
    Forsgren, Malin
    RISE - Research Institutes of Sweden, ICT, SICS.
    Larsen, Stefan
    TIME - en gemensam informationsutbytesplattform för järnvägstransportbranschen2006Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    TIME står för Train Information Management Environment. TIME är ett tänkt övergripande informationssystem för Järnväg. Viktiga aspekter hos TIME är utformningen av en plattform för kommunikation mellan aktörerna i järnvägstransportbranschen och information mellan fordon och system med en fast plats. TIME gäller alla delar i ett informationssystem, hur data produceras och processas, infrastruktur för information och principer för datalagring och informationsutbyte samt funktioner och tjänster baserade på denna information. TIME avser t.ex. att medverka till att samverkan mellan järnvägstransportbranschens aktörer fungerar bra, dessa aktörers egen verksamhet blir effektiv och att kunder till järnvägen och andra som beror av järnvägen erhåller rätt information.

  • 147.
    Ekman, Jan
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Holst, Anders
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Jonasson, Arndt
    RISE., Swedish ICT, SICS, Software and Systems Engineering Laboratory.
    Condition based maintenance of trains doors2011Rapport (Övrigt vetenskapligt)
    Abstract [en]

    As part of the project DUST financed by Vinnova, we have investigated whether event data generated on trains can be used for finding evidence of wear on train doors. We have compared the event data and maintenance reports relating to doors of Regina trains. Although some interesting relations were found, the overall result is that the information in event data about wear of doors is very limited.

  • 148.
    Ekman, Jan
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Kreuger, Per
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    En analytisk metod för utredning av kapacitet vid signalprojektering2003Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    Detta är slutrapporten till projektet "Beslutsstöd för utredning av kapacitetsfrågor vid signalprojektering," utfört av SICS AB under perioden januari 2002 - mars 2003 och finansierat av Banverkets FoU-program. Rapporten beskriver en metod att beräkna kapacitet, där kapacitet avser antalet tåg som per tidsenhet går att framföra genom ett spårområde. Metoden beräknar minsta tiden för en upprepning hos en periodiskt upprepad trafik. I rapporten införs begreppen fri väg och trafikering för att resonera om kapacitet. Dessa begrepp är centrala för metoden och delar upp beräkningen i två delar. Den ena delen utgörs av framtagandet av värden som hör samman med de införda begreppen, från data om bland annat fordon och infrastruktur. Beräkningen av kapacitet från dessa värden utgör den andra delen. Rapporten ger en detaljerad beskrivning av hur man går till väga för att använda metoden, bevis av det grafteoretiska påstående som metoden baseras på och uppskattning av metodens beräkningskomplexitet. Rapporten innehåller också en diskussion kring vad utredning av kapacitet innebär, resonemang kring målet med ett visst kapacitetskrav och förslag på hur kapacitet kravställs. Vid signalprojektering kan metoden användas både till snabba ungefärliga och till noggranna uppskattningar av kapacitet. Lämpliga sätt att använda metoden är att jämföra olika sätt att placera signaler, jämföra ett antal trafiklösningar på en bangård och att jämföra olika val av mötesstationer på en enkelspårssträcka.

  • 149.
    Feeney, Laura Marie
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    A QoS aware power save protocol for wireless ad hoc networks2002Konferensbidrag (Refereegranskat)
  • 150.
    Feeney, Laura Marie
    RISE, Swedish ICT, SICS. RISE, Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Poster Abstract: Motivating an Inter-networking Architecture for WSN/IoT2014Konferensbidrag (Refereegranskat)
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