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  • 101.
    Kawahara, Jun
    et al.
    RISE., Swedish ICT, Acreo. Lintec Corporation, Japan; Linköping University, Sweden.
    Andersson Ersman, Peter
    RISE., Swedish ICT, Acreo.
    Nilsson, David
    RISE., Swedish ICT, Acreo.
    Katoh, Kazuya
    Lintec Corporation, Japan.
    Nakata, Yasukazu
    Lintec Corporation, Japan.
    Sandberg, Mats
    RISE., Swedish ICT, Acreo.
    Nilsson, Marie
    RISE., Swedish ICT, Viktoria.
    Gustafsson, Göran
    RISE., Swedish ICT, Acreo.
    Berggren, Magnus
    Linköping University, Sweden.
    Flexible active matrix addressed displays manufactured by printing coating techniques2013Ingår i: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 51, s. 265-71Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A flexible electrochromic active matrix addressed display, including 8 × 8 pixels, is demonstrated by using solution processing based on standard printing coating manufacturing techniques. Each organic electrochromic display (OECD) pixel its corresponding organic electrochemical transistor (OECT) are located on different sides of the flexible PET substrate. Electronic vias generated through the plastic substrate connects each OECD pixel with one addressing OECT. When comparing this display with actively addressed OECDs with all its components located on the same side, the present approach based on this electronic via substrate provides an enhanced pixel resolution a relatively more simplified manufacturing process.

  • 102. Kianfar, Roozbeh
    et al.
    Augusto, Bruno
    Ebadighajari, Alireza
    Hakeem, Usman
    Nilsson, Josef
    Raza, Ali
    Tabar, Reza S.
    Irukulapati, Naga VishnuKanth
    Englund, Cristofer
    RISE., Swedish ICT, Viktoria.
    Falcone, Paolo
    Papanastasiou, Stylianos
    Svensson, Lennart
    Wymeersch, Henk
    Design and Experimental Validation of a Cooperative Driving System in the Grand Cooperative Driving Challenge2012Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 13, nr 3, s. 994-1007Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this paper, we present the Cooperative Adaptive Cruise Control (CACC) architecture, which was proposed and im- plemented by the team from Chalmers University of Technology, Göteborg, Sweden, that joined the Grand Cooperative Driving Challenge (GCDC) in 2011. The proposedCACCarchitecture con- sists of the following three main components, which are described in detail: 1) communication; 2) sensor fusion; and 3) control. Both simulation and experimental results are provided, demonstrating that the proposed CACC system can drive within a vehicle platoon while minimizing the inter-vehicle spacing within the allowed range of safety distances, tracking a desired speed profile, and attenuating acceleration shockwaves.

  • 103.
    Klang, Mathias
    RISE., Swedish ICT, Viktoria.
    Who do you trust?: Beyond encryption, secure e-business2001Ingår i: Decision Support Systems, ISSN 0167-9236, E-ISSN 1873-5797, Vol. 31, nr 3, s. 293-301Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Electronic commerce has added a new complex issue to international trade. It is based upon the assumption that buyers and sellers conduct business with very little information about each other. This paper is on the importance and development of trust in electronic commerce. The importance of these assets in commercial relations is discussed. The paper describes how reputation is protected as a legal asset and how laws or legal principles support trust relationships in trade. Finally, the importance of developing legal guidelines for trust and reputation as a counterbalance to the lack of morality on the Internet is discussed. © 2001 Elsevier Science B.V.

  • 104.
    Klang, Mathias
    et al.
    RISE., Swedish ICT, Viktoria.
    Ihlström, C.
    Olsson, S.
    Overcoming barriers: Why SMEs should consider networks2002Ingår i: International Journal of Services Technology and Management, ISSN 1460-6720, E-ISSN 1741-525X, Vol. 3, nr 1, s. 68-81Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    "Firms, markets and relational contracting are important economic institutions. They are also the evolutionary product of a fascinating series of organizational innovations." Small and medium sized enterprises (SME) are at a disadvantage when competing in a global environment. This paper looks at the need for specialized and adequate tools for the small and medium sized enterprise. These tools are comprised of both human and technical elements if they are to be successful in providing SMEs with the wherewithal to compete efficiently on the global marketplace. Copyright © 2002 Inderscience Enterprises Ltd.

  • 105.
    Landgren, Johan
    RISE., Swedish ICT, Viktoria.
    Supporting fire crew sensemaking enroute to incidents2005Ingår i: International Journal of Emergency Management, ISSN 1471-4825, E-ISSN 1741-5071, Vol. 2, nr 3, s. 176-188Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Reconstruction of major emergencies and crises as well as observations of large-scale emergency exercises are common approaches for studying and understanding various actors' work practice in emergency response. Studies of small-scale emergencies using an ethnographic approach are less common. This paper presents data from a single small-scale emergency as part of an extensive ethnographical field study. A detailed analysis of sensemaking in a fire crew enroute a small-scale emergency is outlined. The theory of sensemaking is applied as an analytical lens, aiming to explain the communication between the command centre operator and the fire crew in terms of sensemaking. Further, implications for the design of information technology use for fire crew enroute sensemaking will be presented as well as brief reflections of the consequences of such design. Copyright © 

  • 106. Larsson, Tony
    et al.
    Jansson, Jonas
    Grante, Christian
    Englund, Cristofer
    RISE., Swedish ICT, Viktoria.
    Cooperative Partly Automated and Coordinated Vehicles and Transports2014Ingår i: 2014 National Workshop on Transportation Cyber-Physical Systems, 2014Konferensbidrag (Övrigt vetenskapligt)
  • 107. Larsson, V
    et al.
    Johannesson, L
    RISE., Swedish ICT, Viktoria.
    Egardt, B
    Karlsson, S
    Commuter Route Optimized Energy Management of Hybrid Electric Vehicles2014Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 15, nr 3, s. 1145-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Optimal energy management of hybrid electric vehicles requires a priori_x000D_ information regarding future driving conditions, the acquisition processing of this_x000D_ information is nevertheless often neglected in academic research. This paper introduces a_x000D_ commuter route optimized energy management system, where the bulk of the computations_x000D_ are performed on a server. The idea is to identify commuter routes from historical driving_x000D_ data, using hierarchical agglomerative clustering, then precompute an optimal ..._x000D_

  • 108.
    Larsson, Viktor
    et al.
    Chalmers University of Technology, Sweden.
    Johannesson, Lars
    RISE., Swedish ICT, Viktoria.
    Egardt, Bo
    Chalmers University of Technology, Sweden.
    Analytic Solutions to the Dynamic Programming sub-problem in Hybrid Vehicle Energy Management2014Ingår i: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 64, nr 4, s. 1458-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The computationally demanding dynamic programming (DP) algorithm is frequently used in academic research to solve the energy management problem of a hybrid electric vehicle (HEV). This paper is exclusively focused on how the computational demand of such a computation can be reduced. The main idea is to use a local approximation of the gridded cost-to-go and derive an analytic solution for the optimal torque split decision at each point in the time and state grid. Thereby, it is not necessary to quantize the torque split and identify the optimal decision by interpolating in the cost-to-go. Two different approximations of the cost-to-go are considered in this paper: 1) a local linear approximation and 2) a quadratic spline approximation. The results indicate that computation time can be reduced by orders of magnitude with only a slight degradation in simulated fuel economy. Furthermore, with a spline approximated cost-to-go, it is also possible to significantly reduce the memory storage requirements. A parallel plug-in HEV is considered in this paper, but the method is also applicable to an HEV.

  • 109.
    Lidström, K
    et al.
    RISE., Swedish ICT, Viktoria.
    Sjöberg, K
    Holmberg, U
    Andersson, J
    RISE., Swedish ICT, Viktoria.
    Bergh, F
    Bjde, M
    Mak, S
    A Modular CACC System Integration Design2012Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 13, nr 3, s. 1050-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper describes the Halmstad University entry in the GrCooperative Driving Challenge, which is a competition in vehicle platooning. Cooperative platooning has the potential to improve traffic flow by mitigating shock wave effects, which otherwise may occur in dense traffic. A longitudinal controller that uses information exchanged via wireless communication with other cooperative vehicles to achieve string-stable platooning is developed. The controller is integrated into a production vehicle, together with a positioning system, communication system, human€“machine interface (HMI). A highly modular system architecture enabled rapid development testing of the various subsystems. In the competition, which took place in May 2011 on a closed-off highway in The Netherlands, the Halmstad University team finished second among nine competing teams._x000D_

  • 110.
    Lind, K
    et al.
    RISE., Swedish ICT, Viktoria.
    Heldal, R
    A Practical Approach to Size Estimation of Embedded Software Components2012Ingår i: IEEE Transactions on Software Engineering, ISSN 0098-5589, E-ISSN 1939-3520, Vol. 38, nr 5Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    To estimate software code size early in the development process is important for developing cost-efficient embedded systems. We have applied the COSMIC Functional Size Measurement (FSM) method for size estimation of embedded software components in the automotive industry. Correlational studies were conducted using data from two automotive companies. The studies show strong correlation between functional size software code size, which is important for obtaining accurate estimation results. This paper presents the characteristics results of our work, aims to provide a practical framework for how to use COSMIC FSM for size estimation purposes. We investigate the results from our earlier correlational studies, conduct further studies to identify such a framework. Based on these activities, we conclude that a clear purpose of the estimation process, a well-defined_x000D_ domain allowing categorization of software, consistent content quality of requirements, historical data from implemented software are key factors for size estimation of embedded software components._x000D_

  • 111.
    Lind, K
    et al.
    RISE., Swedish ICT, Viktoria.
    Heldal, R
    CompSize: A Model-Based Automated Approach to Size Estimation of Embedded Software Components2012Ingår i: IEICE Transactions on Information Systems, Vol. e95-d, nr 9Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Accurate estimation of Software Code Size is important for developing cost-efficient embedded systems. The Code Size affects the amount of system resources needed, like ROM RAM memory, processing capacity. In our previous work, we have estimated the Code Size based on CFP (COSMIC Function Points) within 15% accuracy, with the purpose of deciding how much ROM memory to fit into products with high cost pressure. Our manual CFP measurement process would require 2,.5 man years to estimate the ROM size required in a typical car. In this paper, we want to investigate how the manual effort involved in estimation of Code Size can be minimized. We define a UML Profile capturing all information needed for estimation of Code Size, develop a tool for automated estimation of Code Size based on CFP. A case study will show how UML models save manual effort in a realistic case._x000D_

  • 112.
    Lind, Mikael
    et al.
    RISE., Swedish ICT, Viktoria.
    Hägg, Mikael
    Chalmers University of Technology, Sweden.
    Siwe, Ulf
    Swedish Maritime Administration, Sweden.
    Haraldson, Sandra
    RISE., Swedish ICT, Viktoria.
    Sea Traffic Management - Beneficial for all Maritime Stakeholders2016Ingår i: Transportation Research Procedia, 2016, Vol. 14, s. 183-192Konferensbidrag (Refereegranskat)
    Abstract [en]

    Sea Traffic Management is the idea of sharing information and collaborating to optimise the maritime transport chain while increasing safety and sustainability. The digital information on-board and on shore is abundant; however, the interconnection today is point-to-point and proprietary and stops the industry becoming more efficient. We will discuss how Sea Traffic Management will help the industry achieve improved predictability by introducing standards for key information and supplying an infrastructure for information exchange. This enables all actors involved in the transport to plan better and utilise their resources more efficiently. Shorter routes, just-in-time arrivals, shorter port calls are factors that will strengthen the competitiveness of the maritime sector. Improved situational awareness on the bridge and knowledge of planned routes will help optimised planning as well as reducing the number of incidents and accidents. The standard route exchange format submitted by the EU-financed MONALISA 2.0 project partners in 2014 is included in the current edition of the IEC standard, which was launched in August 2015. Solutions using that standard will start realising the benefits already next year. We will describe an infrastructure, which could work in a centralised manner but also has the flexibility to be organised in a more federative manner, similar to how the maritime world works in many aspects. Some key components are: a unique identifier for each voyage; that the information publisher controls who can access the data; that updated information should be made available in real-time; and that subscription to updated data will be the main trigger for many systems and processes. We will also describe the outcomes of the test beds in the MONALISA 2.0 project - The Sound: how shore and vessel can interact better in order improve safety in dense traffic areas; Port of Gothenburg and Port of Valencia - how collaborative decision making can improve operations for all involved actors; European Maritime Simulator Network - how new solutions can be tested in complex traffic situations and areas with real people on a large number of bridges, without risk. How large of an impact will all this have on the maritime transport industry? Based on a study from Linköping University, we believe that the number €1 billion/year in Europe due to shorter routes is only the tip of the benefit iceberg. In the study ship operators and society split the benefit 50/50. Ship operators save on fuel and other cost, society saves on reduced emissions, and other actors associated to maritime operations benefit from a higher degree of infrastructural use. We will also present results from other business cases developed during 2015, in which the benefits of Sea Traffic Management are elaborated on main stakeholders.

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  • 113.
    Linder, Marcus
    RISE., Swedish ICT, Viktoria.
    Determinants of economic performance of environmental technology-based offers: A cross-sectional study of small Swedish firms2016Ingår i: International Journal of Innovation and Sustainable Development, ISSN 1740-8822, E-ISSN 1740-8830, Vol. 10, nr 3, s. 237-259Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The paper examines the association between offer differentiation based on environmental orientation and economic performance. The analysis consists of an ordinary least-squares regression based on accounting data and a survey of the leaders of small environmental technology-based firms in Sweden. The results indicate that eco-efficiency creating a low total cost of ownership is more strongly associated with offer performance than is regulatory support, eco-branding, eco-quality differentiation and provision of strategic environmental information. This suggests that environmental differentiation of offers is the most successful when it is associated with a low total cost of ownership for customers.

  • 114.
    Lindgren, Anders
    et al.
    RISE., Swedish ICT, SICS, Decisions, Networks and Analytics lab.
    Habibovic, Azra
    RISE., Swedish ICT, Viktoria.
    Amanuel, Mahdere
    Englund, Cristofer
    RISE., Swedish ICT, Viktoria.
    ITS-solutions for the identification of dangerous goods and non-moving vehicles research within the Stockholm Bypass project2014Ingår i: The 6th International symposium on Tunnel Safety and Security (ISTSS), 2014, s. 613-620Konferensbidrag (Refereegranskat)
  • 115.
    Lindgren, Rikard
    RISE., Swedish ICT, Viktoria.
    Adopting competence systems in fast-growing knowledge-intensive organisations2005Ingår i: Journal of Information & Knowledge Management, ISSN 0219-6492, E-ISSN 1793-6926, Vol. 4, nr 1, s. 1-13Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Today, many organisations are reliant on the competence of individual knowledge workers. Information systems to support competence management are thus considered to be vital tools in order to gain competitive advantage. Competence systems are intended to support staff allocation and management of competence by providing firms with competence overviews. This paper presents a qualitative case study of the adoption of such systems in a fast-growing knowledge-intensive organisation. Applying a situated change perspective on organisational transformation, the paper analyses how different changes were managed in the process of competence systems adoption. Building on this analysis, this paper contributes a set of managerial implications for managing the situated nature of such changes in leveraging the use of competence systems. In addition, the paper also discusses how the implications generated apply to the management of knowledge management systems adoption.

  • 116.
    Lindgren, Rikard
    RISE., Swedish ICT, Viktoria.
    Competence visualizer: Generating competence patterns of project groups2003Ingår i: Journal of Information & Knowledge Management, ISSN 0219-6492, E-ISSN 1793-6926, Vol. 2, nr 1, s. 1-14Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper describes and evaluates the design of competence visualizer (CV), which is a competence system generating competence patterns of project groups. The system provides novel features that: (1) make it possible to survey competence status of teams in different sizes at a specific moment; (2) handle information about both existing competencies and competence interests; and (3) manage snapshots of a particular point of time and development over a certain period regarding existing competencies and competence interests. The results from the system evaluation include fields of application, future design challenges, and organizational issues. A first conclusion is that competence systems need the potential to handle flexible visualizations of existing competencies as well as competence interests of organizational members. A second conclusion is that organizational issues, such as incentives and management, are critical in order to attain data quality in a competence system. ©

  • 117.
    Lindgren, Rikard
    et al.
    RISE., Swedish ICT, Viktoria.
    Andersson, M.
    Henfridsson, Ola
    RISE., Swedish ICT, Viktoria.
    Multi-contextuality in boundary-spanning practices2008Ingår i: Information Systems Journal, ISSN 1350-1917, E-ISSN 1365-2575, Vol. 18, nr 6, s. 641-661Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The capability to establish boundary-spanning practices within and across organizations has for long been recognized as a key strategic resource. As organizations are becoming distributed and dynamic, they will be increasingly populated by multiple functional, geographical, hierarchical and professional boundaries. The inherent complexity of such settings makes it difficult for organizations to leverage their boundary-spanning practices. Information technology (IT) systems have been hailed as a critical enabler of boundary spanning. However, there is little knowledge on how organizations are affected by the introduction of different types of IT systems. Building on an interpretive case study of Swedish transport organizations, this paper explores consequences of sensor technology for boundary spanning. The paper contributes with an understanding of what coexisting use contexts mean for boundary-spanning practices. A theoretical implication is that such multi-contextuality requires an integrative view on boundary spanning that combines insights from the organizational innovation and work practice literatures. © 2008 Blackwell Publishing Ltd.

  • 118.
    Lindgren, Rikard
    et al.
    RISE., Swedish ICT, Viktoria.
    Henfridsson, Ola
    RISE., Swedish ICT, Viktoria.
    Using competence systems: Adoption barriers and design suggestions ;2002Ingår i: Journal of Information & Knowledge Management, ISSN 0219-6492, E-ISSN 1793-6926, Vol. 1, nr 1, s. 65-77Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper examines barriers to adopting competence systems in knowledge work practice. On the basis of a technology review and a user site investigation, the paper relates the technical features of the investigated competence systems to the adoption barriers identified in six user organizations. The multiple-case study shows that the competence systems can be described as merely traditional personnel administration systems complemented by features that passively archive formalized descriptions of competencies. Building on this observation, the general objective of the paper is to provide design suggestions that facilitate successful integration of competence systems in organizations. The main conclusion of this paper is that competence systems need to have features conveying a technology spirit more in line with the knowledge work practice found in organizations. By researching competence systems and their features specifically, this paper contributes technology-specific knowledge within the area of knowledge management systems

  • 119.
    Lindgren, Rikard
    et al.
    RISE., Swedish ICT, Viktoria.
    Henfridsson, Ola
    RISE., Swedish ICT, Viktoria.
    Schultze, U.
    Design principles for competence management systems: A synthesis of an action research study2004Ingår i: Management Information Systems Quarterly, ISSN 0276-7783, E-ISSN 2162-9730, Vol. 28, nr 3, s. 435-472Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Even though the literature on competence in organizations recognizes the need to align organization level core competence with individual level job competence, it does not consider the role of information technology in managing competence across the macro and micro levels. To address this shortcoming, we embarked on an action research study that develops and tests design principles for competence management systems. This research develops an integrative model of competence that not only outlines the interaction between organizational and individual level competence and the role of technology in this process, but also incorporates a typology of competence (competence-in-stock, competence-in-use, and competence-in-the-making). Six Swedish organizations participated in our research project, which took 30 months and consisted of two action research cycles involving numerous data collection strategies and interventions such as prototypes. In addition to developing a set of design principles and considering their implications for both research and practice, this article includes a self-assessment of the study by evaluating it according to the criteria for canonical action research.

  • 120.
    Lindgren, Rikard
    et al.
    RISE., Swedish ICT, Viktoria.
    Stenmark, Dick
    RISE., Swedish ICT, Viktoria.
    Ljungberg, Jan
    RISE., Swedish ICT, Viktoria.
    Rethinking competence systems for knowledge-based organizations2003Ingår i: European Journal of Information Systems, ISSN 0960-085X, E-ISSN 1476-9344, Vol. 12, nr 1, s. 18-29Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Existing competence systems are based on a rationalistic view of competence. While these competence systems might work in job-based organizations, we argue that in more dynamic settings, such as in knowledge-based organizations, the interest-informed actions that capture the emergent competencies of tomorrow require different types of information technology support. The main objective of this paper is to elaborate on the possibilities and implications of using interest-activated technology as a design rationale for competence systems. This paper is based on an action case study of an implemented interest-activated Intranet recommender system prototype at Volvo Information Technology AB in Gothenburg, Sweden. On the basis of how organizational members used this prototype to find information they were interested in, our research team was able to inquire into how personal interest, embodied in information-seeking activities, could be a means for identifying competence. Building on the relation between personal interest and competence, we discuss competence systems design and spell out explicit implications for managerial practice in knowledge-based organizations.

  • 121.
    Ljungberg, F.
    RISE., Swedish ICT, Viktoria.
    Information technology and organizational transformation. Innovation for the 21st century organization1998Ingår i: Information Technology and People, ISSN 0959-3845, E-ISSN 1758-5813, Vol. 11, nr 4, s. 373-375Artikel i tidskrift (Refereegranskat)
  • 122.
    Ljungberg, J.
    RISE., Swedish ICT, Viktoria.
    Open source movements as a model for organising2000Ingår i: European Journal of Information Systems, ISSN 0960-085X, E-ISSN 1476-9344, Vol. 9, nr 4, s. 208-216Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Open source software such as the operating system Linux has in a few years created much attention as an alternative way to develop and distribute software. Open source is to let anyone have access to the source code, so that they can modify it. Open source can be seen as a movement, where communities of highly skilled programmers collectively develop software, often of a quality that outperforms commercial proprietary software. These movements are based on virtual networking on the Internet and the web. They are loosely coupled communities kept together by strong common values related to hacker culture. Work seems to be totally distributed, delegated and loosely coupled. The highly skilled members contribute to the collective effort of free software development. In this paper the open source phenomenon is investigated from different perspectives. It is claimed that the open source movement is one key to the understanding of future forms of organizations, information work and business.

  • 123.
    Ljungblad, Sara
    et al.
    RISE., Swedish ICT, Viktoria.
    Holmquist, Lars Erik
    RISE., Swedish ICT, SICS.
    Transfer Scenarios: Grounding Innovation with Marginal Practices2007Konferensbidrag (Refereegranskat)
    Abstract [en]

    Transfer scenarios is a method developed to support the design of innovative interactive technology. Such a method should help the designer to come up with inventive ideas, and at the same time provide grounding in real human needs. In transfer scenarios, we use marginal practices to encourage a changed mindset throughout the design process. A marginal practice consists of individuals who share an activity that they find meaningful. We regard these individuals not as end-users, but as valuable input in the design process. We applied this method when designing novel applications for autonomous embodied agents, e.g. robots. Owners of unusual pets, such as snakes and spiders, were interviewed - not with the intention to design robot pets, but to determine underlying needs and interests of their practice. The results were then used to design a set of applications for more general users, including a dynamic living-room wall and a set of communicating hobby robots.

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  • 124.
    Lundin, J.
    et al.
    RISE., Swedish ICT, Viktoria.
    Magnusson, M.
    RISE., Swedish ICT, Viktoria.
    Collaborative learning in mobile work2003Ingår i: Journal of Computer Assisted Learning, ISSN 0266-4909, E-ISSN 1365-2729, Vol. 19, nr 3, s. 273-283Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Moving towards more communication intensive organisations, where work tends to be mobile, understanding how to support learning in such work becomes increasingly important. This paper reports on a study of a customer relations team, where work is performed co-located, distributed as well as mobile. Collaborative learning within in this team is explored so as to inform the design of IT support. In the results four instances of collaborative learning important in the studied team were identified: walking into collaborative learning, travelling to meetings, articulating practice and sharing without articulating. These issues are discussed and how they affect the design of collaborative learning activities for mobile knowledge workers.

  • 125.
    Lundin, Johan
    RISE., Swedish ICT, Viktoria.
    Designing computer supported collaborative learning activities for specific contexts2004Ingår i: PsychNology Journal, ISSN 1720-7525, E-ISSN 1720-7525, Vol. 2, nr 2, s. 205-228Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper explores the design of computer supported collaborative learning activities. There is a need for methods to develop learning activities suitable for various domains. The context in focus here is workplace learning, specifically collaborative learning among mobile and distributed colleagues. The design method proposed builds on input from qualitative studies, organized learning activities and the possibilities of new technology. Scenarios are used to be able to evaluate and innovate learning activities. In this paper the use of learning activities (generally accumulated from research in a non-work context) is combined with qualitative studies to inform design of IT-supported workplace learning. When applying the method to a case of introducing a specific collaborative learning activity (multimedia scenarios) to a context of mobile and distributed workers, it proves useful.

  • 126. Löfstrand, S.
    et al.
    Hellgren, J.
    Thulin, N.
    Engdahl, Henrik
    RISE., Swedish ICT, Viktoria.
    Pettersson, Stefan
    RISE., Swedish ICT, Viktoria.
    Williamsson, J.
    Sandoff, A.
    Feasibility of Electrifying Urban Goods Distribution Trucks2013Ingår i: SAE International Journal of Commercial Vehicles, ISSN 1946-391X, E-ISSN 1946-3928, Vol. 6, nr 1, s. 24-33Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper discusses the feasibility of electrifying medium to heavy urban goods distribution trucks. As a case study, an existing transport system in the Swedish city of Gothenburg is used. The project is a joint research effort between a vehicle OEM, an electric utility, a fleet operator, the Swedish Transport Administration and two research organizations. One main objective is to determine if and when different electrified powertrains are cost efficient to the end user. The results indicate that by 2015 conventional powertrains are still probably the most cost effective alternative in all applications studied. But in 2025, electrified powertrains are most cost efficient for most transport scenarios. These results indicate a transition in preferred powertrain technology for urban trucks within the coming ten years. It is important to point out that this result may not be general. Driving patterns, energy price developments and technology maturity of components such as batteries and motors greatly influence the total cost of ownership and large regional differences in when such a transition may occur are expected. In addition to the total cost of ownership, important issues for a successful deployment are policies (e.g. restricting access to urban areas for noisy and polluting vehicles), information and communication solutions (e.g. adapted route planning), access to a cost effective charging infrastructure (and low-carbon electricity production) and new business models. These must all be developed in parallel to the vehicle and powertrain technology. The large number of different stakeholders involved in this transition is also a challenge in itself.

  • 127.
    Mathiassen, Lars
    et al.
    RISE., Swedish ICT, Viktoria.
    Andersson, Ingegerd
    RISE., Swedish ICT, Viktoria.
    Hanson, Kerstin
    RISE., Swedish ICT, Viktoria.
    Service provision in a software technology unit2003Ingår i: JIT. Journal of information technology (Print), ISSN 0268-3962, E-ISSN 1466-4437, Vol. 18, nr 3, s. 195-209Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Large software organizations establish software technology units for managing the methods and tools aimed at supporting their software engineers. This division between software development and new technologies for software development establishes specialized competencies, supports standardization across software projects and departments and provides dedicated resources for innovation. However such software technology units are faced with complex diffusion projects that are difficult and challenging to manage and that in many cases lead to unsatisfactory results. This paper reports from attempts to improve diffusion practices within a technology unit in a large software organization. Two complementary roles for software technology units, i.e. technology supplier and service provider, are presented and used for interpreting the experiences. The research suggests that technology units in large software organizations can improve their diffusion practices by complementing the traditional role as a technology supplier with that of a service provider. The paper offers lessons on how software organizations can take steps in that direction.

  • 128.
    Mathiassen, Lars
    et al.
    RISE., Swedish ICT, Viktoria.
    Pourkomeylian, P.
    Managing knowledge in a software organization2003Ingår i: Journal of Knowledge Management, ISSN 1367-3270, E-ISSN 1758-7484, Vol. 7, nr 2, s. 63-80Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper explores the practical usage of insights on knowledge management (KM) to support innovation in a software organization. The organization has for some time engaged in software process improvement (SPI) initiatives to improve its operation. The paper applies two complementary approaches to KM, the codified and the personalized, to evaluate current KM practices and to improve its SPI practices. Based on the insights from the case we review key principles within SPI and evaluate the applied KM approaches. We conclude that it is advisable for SPI efforts to explicitly address KM issues. Each software organization has to find its own balance between personalized and codified approaches, this balance needs to be dynamically adjusted as the organization matures, and the adopted KM approach should differentiate between different types of SPI services.

  • 129.
    Mellegård, Niklas
    et al.
    RISE., Swedish ICT, Viktoria.
    Ferwerda, Adry
    Centric, Netherlands.
    Lind, Kenneth
    RISE., Swedish ICT, Viktoria.
    Heldal, Rogardt
    Chalmers University of Technology, Sweden; University of Gothenburg, Sweden.
    Chaudron, Michel R. V.
    Chalmers University of Technology, Sweden; University of Gothenburg, Sweden.
    Impact of Introducing Domain-Specific Modelling in Software Maintenance: An Industrial Case Study2016Ingår i: IEEE Transactions on Software Engineering, ISSN 0098-5589, E-ISSN 1939-3520, Vol. 42, nr 3, s. 248-263, artikel-id 7270333Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Domain-specific modelling (DSM) is a modern software development technology that aims at enhancing productivity. One of the claimed advantages of DSM is increased maintainability of software. However, current empirical evidence supporting this claim is lacking. In this paper, we contribute evidence from a case study conducted at a software development company. We study how the introduction of DSM affected the maintenance of a legacy system. We collected data about the maintenance phase of a system that was initially developed using manual programming, but which was gradually replaced by DSM development. We performed statistical analyses of the relation between the use of DSM and the time needed to resolve defects, the defect density, and the phase in which defects were detected. The results show that after introducing DSM the defect density is lower, that defects are found earlier, but resolving defects takes longer. Other observed benefits are that the number of developers and the number of person-hours needed for maintaining the system decreased, and the portability to new platforms increased. Our findings are useful for organizations that consider introducing DSM and would like to know which benefits can be realized in software maintenance.

  • 130.
    Mitraka, Evangelia
    et al.
    Linköping University, Sweden.
    Kergoat, Loïg
    Linköping University, Sweden.
    Khan, Zia Ullah
    Linköping University, Sweden.
    Fabiano, Simone
    Linköping University, Sweden.
    Douheret, Olivier
    University of Mons, Belgium.
    Leclere, Philippe
    University of Mons, Belgium.
    Nilsson, Marie
    RISE., Swedish ICT, Viktoria.
    Andersson Ersman, Peter
    RISE., Swedish ICT, Acreo.
    Gustafsson, Göran
    RISE., Swedish ICT, Acreo.
    Lazzaroni, Roberto
    University of Mons, Belgium.
    Berggren, Magnus
    Linköping University, Sweden.
    Crispin, Xavier
    Linköping University, Sweden.
    Solution processed liquid metal-conducting polymer hybrid thin films as electrochemical pH-threshold indicators2015Ingår i: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 3, nr 29, s. 7604-7611Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A global and accurate mapping of the environment could be achieved if sensors and indicators are mass-produced at low cost. Printed electronics using polymeric (semi)conductors offer a platform for such sensor/indicator based circuits. Herein, we present the material concept for an electrochemical pH-threshold indicator based on a printable hybrid electrode which comprises a liquid metal alloy (GaInSn) embedded in a conducting polymer matrix (PEDOT). This hybrid electrode displays a large variation in open circuit potential versus pH in an electrochemical cell, which when connected to the gate of an electrochemical transistor leads to a dramatic change in the drain current in a narrow range of pH.

  • 131.
    Murgovski, N.
    et al.
    Chalmers University of Technology, Sweden.
    Grahn, M.
    Chalmers University of Technology, Sweden; Volvo Car Corporation, Sweden.
    Mård Johannesson, Lars
    RISE., Swedish ICT, Viktoria. Chalmers University of Technology, Sweden.
    McKelvey, T.
    Chalmers University of Technology, Sweden.
    Automated Engine Calibration of Hybrid Electric Vehicles2015Ingår i: IEEE Transactions on Control Systems Technology, ISSN 1063-6536, E-ISSN 1558-0865, Vol. 23, nr 3, s. 1063-1074, artikel-id 6924797Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We present a method for automated engine calibration, by optimizing engine management settings and power-split control of a hybrid electric vehicle (HEV). The problem, which concerns minimization of fuel consumption under a NOxconstraint, is formulated as an optimal control problem. By applying Pontryagin's maximum principle, this paper shows that the problem is separable in space. In the case where the limits of battery state of charge are not activated, we show that the optimization problem is also separable in time. The optimal solution is obtained by iteratively solving the power-split control problem using dynamic programming or the equivalent consumption minimization strategy. In addition, we present a computationally efficient suboptimal solution, which aims at reducing the number of power-split optimizations required. An example is provided concerning optimization of engine management settings and power-split control of a parallel HEV. 

  • 132. Murgovski, N
    et al.
    Johannesson, L
    RISE., Swedish ICT, Viktoria.
    Egardt, B
    Optimal battery dimensioning control of a CVT PHEV powertrain2013Ingår i: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 63, nr 5, s. 2141-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents convex modeling steps for the problem of optimal battery dimensioning control of a plug-in hybrid electric vehicle with a continuous variable transmission. The power limits of the internal combustion engine the electric machine are approximated as convex/concave functions in kinetic energy, while their losses are approximated as convex in both kinetic energy power. An example is presented of minimizing total cost of ownership of a city bus including battery wear model. The proposed method is also used to obtain optimal charging power from an infrastructure that is to be designed at the same time the bus is dimensioned._x000D_

  • 133.
    Murgovski, N.
    et al.
    Chalmers University of Technology, Sweden.
    Johannesson, L
    RISE., Swedish ICT, Viktoria. Chalmers University of Technology, Sweden.
    Egardt, B.
    Chalmers University of Technology, Sweden.
    Optimal Battery Dimensioning Control of a CVT PHEV Powertrain2014Ingår i: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 63, nr 5, s. 2151-2161Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents convex modeling steps for the problem of optimal battery dimensioning control of a plug-in hybrid electric vehicle with a continuous variable transmission. The power limits of the internal combustion engine the electric machine are approximated as convex/concave functions in kinetic energy, whereas their losses are approximated as convex in both kinetic energy power. An example of minimizing the total cost of ownership of a city bus including a battery wear model is presented. The proposed method is also used to obtain optimal charging power from an infrastructure that is to be designed at the same time the bus is dimensioned.

  • 134. Murgovski, N
    et al.
    Johannesson, L
    RISE., Swedish ICT, Viktoria.
    Sjöberg, J
    Egardt, B
    Component sizing of a plug-in hybrid electric powertrain via convex optimization2012Ingår i: Mechatronics (Oxford), ISSN 0957-4158, E-ISSN 1873-4006, Vol. 22, nr 1, s. 106-Artikel i tidskrift (Refereegranskat)
  • 135. Murgovski, N
    et al.
    Johannesson Mårdh, L
    RISE., Swedish ICT, Viktoria.
    Sjöberg, J
    Engine on/off control for dimensioning hybrid electric powertrains via convex optimization2013Ingår i: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 62, nr 7, s. 2949-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a novel heuristic method for_x000D_ optimal control of mixed-integer problems which for given_x000D_ feasible values of the integer variables are convex in the rest of_x000D_ the variables. The method is based on the Pontryagin€™s maximum_x000D_ principle allows the problem to be solved using convex_x000D_ optimization techniques. The advantage of this approach is the_x000D_ short computation time for obtaining a solution near the global_x000D_ optimum, which may otherwise need very long computation time_x000D_ when solved by algorithms guaranteeing global optimum, such_x000D_ as Dynamic Programming._x000D_ In this study the method is applied to the problem of battery_x000D_ dimensioning power split control of a plug-in hybrid electric_x000D_ vehicle where the only integer variable is the engine on/off_x000D_ control, but the method can be extended to problems with more_x000D_ integer variables. The studied vehicle is a city bus which is_x000D_ driven along a perfectly known bus line with a fixed charging_x000D_ infrastructure. The bus can charge either at standstill, or while_x000D_ driving along a tram line (slide-in)._x000D_ The problem is approached in two different scenarios: first,_x000D_ only the optimal power split control is obtained for several fixed_x000D_ battery sizes, second, both battery size power split control_x000D_ are optimized simultaneously. Optimizations are performed over_x000D_ four different bus lines two different battery types, giving_x000D_ solutions that are very close to the global optimum obtained by_x000D_ Dynamic Programming._x000D_

  • 136. Murgovski, N
    et al.
    Xiaosong, H
    Johannesson, L
    RISE., Swedish ICT, Viktoria.
    Egardt, B
    Combined design and control optimization of hybrid vehicles2015Ingår i: Handbook of Clean Energy Systems., 2015, s. 1-14Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    Hybrid vehicles play an important role in reducing energy consumption and pollutant emissions of ground transportation. The increased mechatronic system complexity, however, results in a heavy challenge for efficient component sizing and power coordination among multiple power sources. This chapter presents a convex programming framework for the combined design and control optimization of hybrid vehicles. An instructive and straightforward case study of design and energy control optimization for a fuel cell/supercapacitor hybrid bus is delineated to demonstrate the effectiveness and the computational advantage of the convex programming methodology. Convex modeling of key components in the fuel cell/supercapactior hybrid powertrain is introduced, while a pseudo code in CVX is also provided to elucidate how to practically implement the convex optimization. The generalization, applicability, and validity of the convex optimization framework are also discussed for various powertrain configurations (i.e., series, parallel, and series-parallel), different energy storage systems (e.g., battery, supercapacitor, and dual buffer), and advanced vehicular design and controller synthesis accounting for the battery thermal and aging conditions. The proposed methodology is an efficient tool that is valuable for researchers and engineers in the area of hybrid vehicles to address realistic optimal control problems.

  • 137.
    Murgovski, Nikolce
    et al.
    Chalmers University of Technology, Sweden.
    Egardt, Bo
    Chalmers University of Technology, Sweden.
    Nilsson, Magnus
    RISE., Swedish ICT, Viktoria.
    Cooperative energy management of automated vehicles2016Ingår i: Control Engineering Practice, ISSN 0967-0661, E-ISSN 1873-6939, Vol. 57, s. 84-98Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a cooperative adaptive cruise controller that controls vehicles along a planned route in a possibly hilly terrain, while keeping safe distances among the vehicles. The controller consists of two predictive layers that may operate with different update frequencies, horizon lengths and model abstractions. The top layer plans kinetic energy in a centralized manner by solving a quadratic program, whereas the bottom layer optimizes gear in a decentralized manner by solving a dynamic program. The efficiency of the proposed controller is shown through several case studies with different horizon lengths and number of vehicles in the platoon.

  • 138.
    Mård Johannesson, Lars
    et al.
    RISE., Swedish ICT, Viktoria.
    Murgovski, N.
    Chalmers University of Technology, Sweden.
    Jonasson, E.
    Volvo Group Trucks Technology, Sweden.
    Hellgren, J.
    Volvo Group Trucks Technology, Sweden.
    Egardt, B.
    Chalmers University of Technology, Sweden.
    Predictive energy management of hybrid long-haul trucks2015Ingår i: Control Engineering Practice, ISSN 0967-0661, E-ISSN 1873-6939, Vol. 41, s. 83-97Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a novel predictive control scheme for energy management in hybrid trucks that drive autonomously on the highway. The proposed scheme uses information from GPS together with information about the speed limits along the planned route to schedule the charging and discharging of the battery, the vehicle speed, the gear, and when to turn off the engine and drive electrically. The proposed control scheme divides the predictive control problem into three layers that operate with different update frequencies and prediction horizons. The top layer plans the kinetic and electric energy in a convex optimization problem. In order to avoid a mixed-integer problem, the gear and the switching decision between hybrid and pure electric mode are optimized in a lower layer in a dynamic program whereas the lowest control layer only reacts on the current state and available references. The benefits of the proposed predictive control scheme are shown by simulations between Frankfurt and Koblenz. The simulations show that the predictive control scheme is able to significantly reduce the mechanical braking, resulting in fuel reductions of 4% when allowing an over and under speed of 5. km/h

  • 139. Nilsson, A.
    et al.
    Nulden, Urban
    RISE., Swedish ICT, Viktoria.
    TrottingPal: Designing for mobility, personalization and collaboration at the trotting track2003Ingår i: Managing Leisure, ISSN 1360-6719, E-ISSN 1466-450X, Vol. 8, nr 3, s. 154-167Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper describes an applied research project where the aim was to investigate the culture of trotting spectators and to explore how mobile information technology could be used to support these spectators at the trotting track. The research project was conducted in three phases. The first phase was an ethnographically inspired field study at a Swedish trotting track. The second phase applied the knowledge from phase one to inform the design of an overall architecture for a system supporting trotting spectators. The prototype system TrottingPal was developed. The third phase was a preliminary evaluation of TrottingPal involving a group of experienced spectators. The results of the research include three main characteristics of spectators. First, the study clearly indicates extensive mobility among the spectators, which stems from the process of gathering relevant trotting information from various sources located at different places at the track. Second, personalization of trotting information has been found to be important, since there is a great diversity in what spectators consider to be relevant and valid information. Third, the trotting track offers a rich environment of event information, in terms of other spectators that possess valuable knowledge about competitors, conditions, etc. Groups of spectators collaborate through exchanging information to create a shared knowledge base in order to place their bets. The preliminary evaluation of the prototype TrottingPal indicated that it is likely to be accepted as a tool for spectators at the trotting track.

  • 140.
    Nilsson, Andreas
    et al.
    RISE., Swedish ICT, Viktoria.
    Nuldén, U.
    Olsson, D.
    Mobile media: The convergence of media and mobile communications2001Ingår i: Convergence. The International Journal of Research into New Media Technologies, ISSN 1354-8565, E-ISSN 1748-7382, Vol. 7, nr 1, s. 34-38Artikel i tidskrift (Refereegranskat)
  • 141. Nilsson, Josef
    et al.
    Strandén, Lars
    Englund, Cristofer
    RISE., Swedish ICT, Viktoria.
    Fault model for cooperative semi-automated vehicles2013Ingår i: 20th ITS World Congress, Tokyo 2013. Proceedings, 2013, s. 1-10, artikel-id 2058.Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents a fault model for vehicle functions that includes communication devices for inter-vehicle cooperation. In particular, the fault model addresses vehicles where automation has partially replaced the driver, i.e., semi-automated cooperative vehicles. Components considered in the fault model include human drivers, communication systems, sensors, actuators, and control units. A description of faults in cooperative systems in general is complemented with an identification of errors in a platooning system. The identification has revealed systematic faults in software and human errors in the interaction between the system and the driver.

  • 142.
    Nilsson, M
    RISE., Swedish ICT, Viktoria.
    Experience electric vehicle: the case of fast charging2012Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The report describes the user study evaluating the two installed fast chargers. In detail, the goal of the user study is to investigate the effect of having access to fast chargers on the drivers’ attitudes and experience of electrical vehicles (EV). In addition, recommendations on how to evaluate these kinds of test environments are provided. The study includes interviews and questionnaires before (test occasion 1) and after (test occasion 2) a trail period of using the fast chargers to capture any changes in attitudes and behaviour. Two test site were included in the study. A total of 5 individuals, accessing one of the two test sites, participated in the study.

    The ability to quickly fully charge the vehicle were emphasised as opposed to the flexibility and ability to use the vehicle more often. This is contradictedn by chargers only being filled to 80%. Also, the fast charger takes longer in winter (45 min as compared to 20 min). All of this lowers the appeal and usage of fast charging. The participants that did experience an added value of the fast charger were those that would use the charger toincrease the efficiency of the vehicle, in e.g., a car pool. The participants that did not experience an added value of having access to a fast charger at the test site were those that (1) not represent the correct user group (2) have had access to the EV for a long time and they already match their daily routine according to the range of the EV, (2) do not have a need to drive long distances, (3) do not have a natural placement of the fast charger for it to play a significant role in their driving; (4) the amount of extra energy the fast charger provides does not play a significant role in their daily driving. However, some interesting (significant) changes in attitudes and behaviour were identified in the survey that needs further investigations (participant alternated from completely agree to completely disagree). The following aspects were identified as influencing the use of the fast charger: Location, amount of charge, cost of charging, time, current battery level, driving distance, safety of the place, and timing. In particular the location of chargers was highlighted as determination of behavioural pattern. General public location may have a limited effect on individual EV users. However, from a company perspective, fast charger may be useful as it directly influence the efficacy of the usage of EV.

  • 143.
    Nilsson, Magnus
    et al.
    RISE., Swedish ICT, Viktoria.
    Johannesson, Lars
    RISE., Swedish ICT, Viktoria. Chalmers University of Technology, Sweden.
    Askerdal, Mikael
    Volvo AB, Sweden.
    ADMM applied to energy management of ancillary systems in trucks2015Ingår i: Proceedings of the American Control Conference, 2015, s. 3459-3466, artikel-id 7171866Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper investigates how recently endorsed methods in distributed optimization can be exploited in the energy-management problem for heavy trucks, with focus on improved control of ancillary systems. The justification for investigating this is because it may offer higher modularity and integrity to the development process of vehicle models. This paper assumes an indirect approach for solving the optimal control problem. For simplicity, a multi-level control hierarchy is also assumed, where prediction and integer decisions are planned at a higher level, while real-time decisions take place at a lower level. This allows the higher level to deliver an estimate of optimal costates to the lower level. Convex models of ancillary components allow the problem to be formulated as a second-order cone program at the lower level, which can be reformulated as an exchange problem suitable for distributed control. The exchange problem is solved using the alternating direction method of multipliers with proximal message passing, which returns a solution with the same fuel economy as that from dynamic programming. Convergence properties are briefly discussed, where the most notable conclusion is that warm start gives a significant improvement on the convergence rate, supporting practical feasibility of the distributed approach.

  • 144.
    Nilsson, Maria
    et al.
    RISE., Swedish ICT, Viktoria.
    Englund, Cristofer
    Amanuel, Mahdere
    On the usage of portable electronic devices: a qualiative study of cyclist behaviour2014Ingår i: International Cycling Safety, 2014Konferensbidrag (Övrigt vetenskapligt)
  • 145. Nilsson, Maria
    et al.
    Williander, Mats
    Englund, Cristofer
    RISE., Swedish ICT, Viktoria.
    Commercialisation of Intelligent Transportation Systems: The Case of Cooperative Systems2012Ingår i: Proceedings of Transport Research Arena (TRA 2012), 2012Konferensbidrag (Refereegranskat)
  • 146.
    Norlin, P.
    et al.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Åberg, O.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Junique, S.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Kaplan, W.
    RISE - Research Institutes of Sweden, ICT, Acreo.
    Andersson, J. Y.
    RISE., Swedish ICT, Viktoria.
    Nilsson, G.
    ScandiDos AB, Sweden.
    A cubic isotropic X-ray dose detector diode fabricated by DRIE of SOI substrates2014Ingår i: Sensors and Actuators A-Physical, ISSN 0924-4247, E-ISSN 1873-3069, Vol. 213, s. 116-21Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A novel X-ray detector diode, optimized for angular independent (isotropic) dose response, is presented. The diode is designed as a silicon cube with p-n junctions on all six sides, which creates a device that is close to being symmetrical in 3D. The cube edge is 300 μm or 410 μm. Its manufacturing process is based on micromachining, featuring deep reactive ion etching (DRIE) of silicon-on-insulator (SOI) substrates, doping of vertical walls from gas phase dopants and re-fill of etched trenches with polysilicon. The variation in detector response to 6 MV X-rays, in a ±30° beam angle range, was at best ±0.5% for a cubic diode compared to ±3.3% for conventional diodes, which indicates improvement by a factor 7.

  • 147.
    Nulden, Urban
    RISE., Swedish ICT, Viktoria.
    e-ducation: Research and practice2001Ingår i: Journal of Computer Assisted Learning, ISSN 0266-4909, E-ISSN 1365-2729, Vol. 17, nr 4, s. 363-375Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper proposes an integrated approach for information technology in an educational context. The paper suggests a framework for the design of computer assisted learning activities - e-ducation. The framework captures three contemporary interrelated aspects of teaching and learning and is more pedagogical than it is analytical. The three aspects covered in the e-ducation framework are electronic, engaged and empowered. An implementation of the framework is used to illustrate how e-ducation can be applied in educational research and practice. The paper concludes that the e-ducation framework contributes to both educational research and educational practice.

  • 148.
    Olsson, Daniel
    et al.
    RISE., Swedish ICT, Viktoria.
    Nilsson, Andreas
    RISE., Swedish ICT, Viktoria.
    MEP - A media event platform2002Ingår i: Mobile Networks and Applications , ISSN 1383-469X, E-ISSN 1572-8153, Vol. 7, nr 3, s. 235-244Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Popular media events of today are likely to attract a big, live audience. Being part of a huge cricket audience, for example, knowing that the event is broadcast to perhaps millions of people, is a truly arousing experience. But the size of the audience and the complexity of events do not come without drawbacks. Spectators find it difficult to be at the right spot at the right time and to grasp the essentials of the on goings. We introduce a Media Event Platform, which combines various sources of event crucial information and lets the mobile user choose from a number of different channels; WAP-phones, web browsers, digital radio, and SMS. This paper adds to the existing body of research by offering a novel multi channel system design for boosting event experiences and provides an early example of how mobile technology influences converging media forms. Further, we report from a user evaluation conducted in order to find implications for design improvements, and describe possible commercial potential.

  • 149.
    Olsson, O
    RISE., Swedish ICT, Viktoria.
    Slide-in Electric Road System, Conductive project report, Phase 12014Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Electrifying vehicles is seen by many as a possible solution to reduce environmental emissions and the dependence on fossil fuel. Unfortunately, most environmentally friendly energy storage systems, such as batteries, have less energy density compared to fossil fuel, which will have a negative impact on the vehicle range. An alternative would be to continuously transfer energy from the road to the vehicle both for propulsion and charging. A development of an electrified road system (ERS) between cities would mean that most of the route could be driven on electricity from the road and the remaining distance can be driven on energy from potentially smaller batteries optimized for city routes.

    This is a first report in the Slide-in project where the final objective is to evaluate the technology to conductively transfer energy from the road to the vehicle based on cost, efficiency and feasibility.

    The project partners are: Volvo GTT, Scania CV, Alstom, Vattenfall, The Swedish Transport Administration, Projektengagemang (Svenska Elvägar AB), Lund University, KTH Royal Institute of Technology and Chalmers

    Ladda ner fulltext (pdf)
    fulltext
  • 150.
    Olsson, O
    RISE., Swedish ICT, Viktoria.
    Slide-in Electric Road System, Inductive project report, Phase 12013Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Electrifying vehicles is seen by many as a possible solution to reduce environmental emissions and the dependence on fossil fuel. Unfortunately, most environmentally friendly energy storage systems, such as batteries, have less energy density compared to fossil fuel, which will have a negative impact on the vehicle range. An alternative would be to continuously transfer energy from the road to the vehicle both for propulsion and charging. A development of an electrified road system (ERS) between cities would mean that most of the route could be driven on electricity from the road and the remaining distance can be driven on energy from potentially smaller batteries optimized for city routes.

    This is a first report in the Slide-in project where the final objective is to evaluate the technology to inductively transfer energy from the road to the vehicle based on cost, efficiency and feasibility.

    The project partners are: Volvo GTT, Scania CV, Bombardier, Vattenfall, The Swedish Transport Administration, Projektengagemang (Svenska Elvägar AB), Lund University, KTH Royal Institute of Technology and Chalmers

    Ladda ner fulltext (pdf)
    fulltext
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v. 2.35.10