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  • 51. Hellström, S
    et al.
    Chen, Z-H
     Fu, Y
    Qiu, M
    Soltanmoradi, R
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Andersson, J Y
    RISE., Swedish ICT, Viktoria.
    Increased photocurrent in quantum dot infrared photodetector by subwavelength hole array in metal thin film2010Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 96, s. 231110-Artikel i tidskrift (Refereegranskat)
  • 52.
    Henfridsson, O
    et al.
    RISE., Swedish ICT, Viktoria.
    Holmström, H
    Lindgren, R
    Olsson, CM
    Svahn, F
    Framtidens Fordon - Mötet Mellan Två Mobila Världar2003Rapport (Övrigt vetenskapligt)
  • 53. Henfridsson, O.
    et al.
    Lind, Mikael
    RISE., Swedish ICT, Viktoria.
    Information systems strategizing, organizational sub-communities, and the emergence of a sustainability strategy2014Ingår i: Journal of strategic information systems, ISSN 0963-8687, E-ISSN 1873-1198, Vol. 23, nr 1, s. 11-28Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The realized strategy contents of information systems (IS) strategizing are a result of both deliberate and emergent patterns of action. In this paper, we focus on emergent patterns of action by studying the formation of strategies that build on local technology-mediated practices. This is done through case study research of the emergence of a sustainability strategy at a European automaker. Studying the practices of four organizational sub-communities, we develop a process perspective of sub-communities' activity-based production of strategy contents. The process model explains the contextual conditions that make sub-communities initiate SI strategy contents production, the activity-based process of strategy contents production, and the IS strategy outcome. The process model, which draws on Jarzabkowski's strategy-as-practice lens and Mintzberg's strategy typology, contributes to the growing IS strategizing literature that examines local practices in IS efforts of strategic importance.

  • 54.
    Henfridsson, O
    et al.
    RISE., Swedish ICT, Viktoria.
    Mathiassen, L
    RISE., Swedish ICT, Viktoria.
    Svahn, F
    RISE., Swedish ICT, Viktoria.
    Managing Technological Change in the Digital Age: The Role of Architectural Frames2014Ingår i: JIT. Journal of information technology (Print), ISSN 0268-3962, E-ISSN 1466-4437, Vol. 29, nr 1, s. 27-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Inspired by Herbert Simon€™s notion of nearly decomposable systems, researchers have examined modularity as a powerful approach to manage technological change in product innovation. We articulate this approach as the hierarchy-of-parts architecture explain how it emphasizes decomposition of a design into loosely coupled parts subsequent aggregation of these into an industrial product. To realize the scale benefits of modularity, firms successively freeze design specifications before production therefore only allow limited windows of functionality design redesign. This makes it difficult to take advantage of the increased speed by which digitized products can be developed modified. To address this problem, we draw on Christopher Alexander€™s notion of design patterns to introduce a complementary approach to manage technological change that is resilient to digital technology. We articulate this approach as the network-of-patterns architecture explain how it emphasizes generalization of ideas into patterns subsequent specialization of patterns for different design purposes. In response to the increased digitization of industrial products, we demonstrate the value of complementing hierarchy-of-parts thinking with network-of-patterns thinking through a case study of infotainment architecture at an automaker. As a result, we contribute to the literature on managing products in the digital age: we highlight the properties of digital technology that increase the speed by which digitized products can be redesigned, we offer the notion of architectural frames propose hierarchy-of-parts network-of-patterns as frames to support innovation of digitized products, we outline an agenda for future research that reconsiders the work of Simon Alexander as well as their followers to address key challenges in innovating digitized products._x000D_

  • 55.
    Henfridsson, Ola
    et al.
    RISE., Swedish ICT, Viktoria.
    Holmstrom, H.
    Developing E-commerce in Internetworked Organizations: A Case of Customer Involvement Throughout the Computer Gaming Value Chain2002Ingår i: Data Base for Advances in Information Systems, ISSN 0095-0033, Vol. 33, nr 4, s. 38-50Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Many computer game developers have adopted network technologies for value-adding purposes at several stages of the corporate value chain. In this paper, we suggest that this adoption extends the current notion of developing e-commerce by including ongoing interaction with the consumers concerning what is being produced. On the basis of an interpretive case study, this paper outlines the process by which a Swedish computer game developer involved its customers in producing, testing, distributing, and marketing its online computer game Clusterball. Using Orlikowski's (1999) notion of ”internetworked organizations”, the paper explores how this customer involvement was supported by the use of network technologies at every stage of the value chain, and it illustrates how this involvement can be understood as an important feature of future development of e- commerce in organizations.

  • 56.
    Hjalmarsson, A
    et al.
    RISE., Swedish ICT, Viktoria.
    Rudmark, D
    RISE., Swedish ICT, Viktoria.
    Designing Digital Innovation Contests2012Ingår i: Lecture Notes in Computer Science, Springer Berlin Heidelberg , 2012, Vol. 7286, s. 9-27Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    In recent years, the phenomena of open data have lent a promise to expand the innovation network of an organization. By allowing this type of access to organizational resources, developers beyond the organizational realm may hence generate new innovative artifacts surpassing existing capabilities. However, as an organization utilizes these innovation capabilities they simultaneously loose significant control over the innovations’ alignment with existing organizational goals. One way to nurture and harness this type of innovation is to arrange a contest where third party developers are invited to attend. Using a Design Science Research approach, such a contest - a type of artifact we coin Digital Innovation Contest - was designed and field-tested in 2011. The contest, WestCoast TravelHack 2011, summoned 76 developers distributed on 20 teams and was based on an idea to both generate novel digital service prototypes and having these applications promote the organizational goal of less energy-consuming ways of everyday travel. We conclude that by following our empirically grounded and theoretically informed guidelines, this type of contest can indeed increase the likelihood of both producing innovative artifacts and aligning these innovations with organizational goals.

  • 57.
    Hjalmarsson, Anders
    et al.
    RISE - Research Institutes of Sweden, ICT, Viktoria.
    Johansson, Niklas
    RISE., Swedish ICT, Viktoria.
    Rudmark, Daniel
    RISE., Swedish ICT, Viktoria.
    Mind the gap: Exploring stakeholders' value with open data assessment2015Ingår i: 2015 48th Hawaii International Conference on System Sciences, 2015, s. 1314-1323, artikel-id 7069968Konferensbidrag (Refereegranskat)
    Abstract [en]

    There is an ongoing movement in society to provide open data as an enabler for innovation and growth. As more data is passed on beyond organizational borders to trigger third party development of services, the expectations on what could be developed using open data increase. Developers have been observed to express frustration over different challenges in the wake of open data provision, such as localization issues, lack of quality in data etc. Knowledge and tools are missing to assess available open data. This absence risks ensuring continual improvement of open data markets and the management of hampering gaps between developers' requests of data and data providers' provision of data. This paper explores the benefits with open data assessment based on an exploratory single case research design.

  • 58.
    Hjalmarsson, Anders
    et al.
    RISE - Research Institutes of Sweden, ICT, Viktoria.
    Juell-Skielse, Gustaf
    Stockholm University, Sweden.
    Ayele, Workneh Y.
    Stockholm University, Sweden.
    Rudmark, Daniel
    RISE., Swedish ICT, Viktoria.
    Johannesson, Paul
    Stockholm University, Sweden.
    From contest to market entry: A longitudinal survey of innovation barriers constraining open data service development2015Ingår i: ECIS 2015 Completed Research Papers, 2015, artikel-id 78Konferensbidrag (Refereegranskat)
    Abstract [en]

    Open data services have emerged as a research field. One important area of investigation within this field is exploration into how sustainable open data markets are created. Contests have become a popular method to propel and catalyse open data service development providing services to such markets. Recent research has identified numerous innovation barriers hampering development adjacent to the contest in developers' effort to transform contest contributions to viable digital services based on open data. Little is however known about what innovation barriers over time constrain the post-contest process to transform initial innovations to finalized open data services ready for market entry. This paper presents a longitudinal survey of innovation barriers constraining teams performing open data service development after an innovation contest. The survey provides insights into 1) 24 innovation barriers constraining development, 2) a comparison of barrier importance based on team progress, and 3) a conceptualisation of phases structuring the process from contests to market entry, stipulating different innovation barriers impact open data service development. The results contribute to the understanding of how sustainable open data markets emerge and serve as a starting point for investigating how different stakeholders can manage innovation barriers constraining open data service development.

  • 59.
    Hjalmarsson, Anders
    et al.
    RISE., Swedish ICT, Viktoria. University of Borås, Sweden.
    Recker, Jan
    Queensland University of Technology, Australia.
    Rosemann, Michael
    Queensland University of Technology, Australia.
    Lind, Mikael
    University of Gothenburg, Sweden; Chalmers University of Technology, Sweden.
    Understanding the behavior of workshop facilitators in systems analysis and design projects: Developing theory from process modeling projects2015Ingår i: Communications of the Association for Information Systems, ISSN 1529-3181, E-ISSN 1529-3181, Vol. 36, s. 421-447, artikel-id 22Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Organizational and technological systems analysis and design practices such as process modeling have received much attention in recent years. However, while knowledge about related artifacts such as models, tools, or grammars has substantially matured, little is known about the actual tasks and interaction activities that are conducted as part of analysis and design acts. In particular, key role of the facilitator has not been researched extensively to date. In this paper, we propose a new conceptual framework that can be used to examine facilitation behaviors in process modeling projects. The framework distinguishes four behavioral styles in facilitation (the driving engineer, the driving artist, the catalyzing engineer, and the catalyzing artist) that a facilitator can adopt. To distinguish between the four styles, we provide a set of ten behavioral anchors that underpin facilitation behaviors. We also report on a preliminary empirical exploration of our framework through interviews with experienced analysts in six modeling cases. Our research provides a conceptual foundation for an emerging theory for describing and explaining different behaviors associated with process modeling facilitation, provides first preliminary empirical results about facilitation in modeling projects, and provides a fertile basis for examining facilitation in other conceptual modeling activities.

  • 60.
    Holmberg, P
    RISE., Swedish ICT, Viktoria.
    GOTRIS Demonstration project - Final report , part 22015Rapport (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    fulltext
  • 61.
    Holmberg, P
    RISE., Swedish ICT, Viktoria.
    GOTRIS demonstration project - Final report, Part 12015Rapport (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    fulltext
  • 62.
    Holmberg, P
    RISE., Swedish ICT, Viktoria.
    GOTRIS Demonstration project, Part 1 - Appendix A-F2015Rapport (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    fulltext
  • 63.
    Holmberg, P
    et al.
    RISE., Swedish ICT, Viktoria.
    Karlsson,
    Selander,
    Johansson,
    GOTRIS- GÖTA ÄLV River Information Services, Projektrapport2011Rapport (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    fulltext
  • 64.
    Holmberg, P
    et al.
    RISE., Swedish ICT, Viktoria.
    Voronov, Alexey
    Englund, Cristofer
    Påverkan av broöppningar på kollektivtrafik över Götaälvbron2014Rapport (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    fulltext
  • 65.
    Holmberg, Per-Erik
    et al.
    RISE., Swedish ICT, Viktoria.
    Collado, Magda
    RISE., Swedish ICT, Viktoria.
    Sarasini, Steven
    RISE., Swedish ICT, Viktoria.
    Williander, Mats
    RISE., Swedish ICT, Viktoria.
    Mobility as a Service - MaaS: Describing the framework2016Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Mobility as a Service is a quite novel term and has not a commonly agreed definition yet. In this report we use the term Combined mobility services to describe a service offering, including public transport in combination with other transport modes such as taxi, car-sharing, bike-sharing etc.

    The drivers for the change in how we will consume mobility are multiple, but the report discusses Societal trends such as Urbanisation ad climate change and sharing economy, Economical trends such as excess capacity and new payment systems together with technological development as enabler for the transition.

     

    New mobility services are constantly entering the market, and one of the most well-known is UBER. The limousine brokering service that, based on a technological platform have expanded around the world and also in terms of the service offering, now offering services covering the taxi-segment and now starting to offer services very close to public transport.

    The auto-makers are starting to grasp a possible different future, and are launching mobility services such as car-pool, free-floating car-pools and simplified car-owning schemes.

    Especially in the Nordic countries, the concept of MaaS is taking of, with services like Ubigo, which was piloted in Goteborg during 2014 and MaaS.fi, a Finnish MaaS-service to be started in 2016 in Finland with the goal of a global expansion. Telecom actors like Ericsson and Sonera are also active in this area. In Sweden, the public transport sector is analysing which role they should take in the MaaS-actor-ecosystem, and in Västra Götaland, a pre-commercial procurement of combined mobility services is scheduled for 2016. On a European level, the MaaS-alliance, supported by ERTICO[1], was formed during 2015 with the aim to stimulate the implementation of MaaS in Europe. EU also supports the concept by issuing a specific topic for MaaS in the 2016 H2020 mobility call.

    There are also a series of research-project ongoing, especially in Sweden and Finland, studying MaaS from a institutional, business and technical perspective. However, few studies are currently researching the sustainability effects of MaaS, even though initial studies indicates that MaaS, if designed bad, also can have negative environmental effects.

     

    Mobility as a Service can be designed in different ways and with different types of actors as the lead. If the public transport should be the coordinator of MaaS or a facilitating collaborator is discussed in the report. The report argues that public transport can provide a better stability of such a service (compared to a commercial MaaS operator), but also that public transport do not have the same flexibility in service offering as an external actor, and that they may attract more public transport users than car-owners to the service, in which case the environmental effects can be negative. The report also argues that if MaaS-service is subsidized (other than the services provided by PT), it can also lead to negative rebound effects, and if it is NOT subsidized, there are less reasons why public transport should organise the MaaS-service.

    UITP, the international organisation for public transport, have an active process for combined mobility services, CMS,(as MaaS is named in the PT sector) and promotes PT to take an active or even leading role in the establishment of this.

     

    In the report, some models are introduced for describing different types of mobility services emerging, and the most important distinction of what the report describes as MaaS, is that a Combined Mobility Service provides a subscription of some kind and possibly also a re-packaging of included services, while integrated public transport mainly gives the user the possibility to plan, book, and pay for the whole journey with several transport modes in one service (app). CMS is therefore both a business model and a technical platform which draws its profitability on the reduction of privately owned cars, whilst integrated public transport represents mainly a technical integration which mainly simplifies the shift between modes for a single trip. Both these versions are often referred as MaaS-services.

     

    The eco-system of MaaS, and different actor roles are introduced in the report, showing that there are business opportunities for Maas-operators, platform providers, mobility service providers as well as for public transport if the MaaS-service is designed in a right way.

     

    Several institutional barriers are identified in the report, which if addressed, could facilitate a faster introduction of MaaS. The Swedish transport subsidy system is discussed, where subsidizing of cars is allowed, but not the subsidizing of mobility services. The role of public transport and the importance of PT (brand) facing the customer, or if a neutral actor is better in attracting private car-owners to exchange the car for mobility services. The technical matureness of public transport is addressed, while a digitized business process (buying, paying and distributing electronic tickets) is a prerequisite for a commercial MaaS-operator to be able to include public transport in the service offering. Technically, Swedish public transport has a very good position through the work done at X2AB/Samtrafiken, but the policy issues around the possibility for third-party actors to use this, is not yet addressed, especially not on a national level.

    Finally several areas are identified where more research is needed to fully understand and take advantage of the possibilities with MaaS. The foremost area, where few initiatives have been identified, is the sustainability effects of MaaS. If wrongly designed, MaaS can give environmental effects of the service are negative (e.g making PT users to use more car-pools), and positive effects are gained if citizens are exchanging the owning of a car with subscription of mobility services.

    Other identified research areas are social factors like accessibility are effected by less car-ownership and the introduction of MaaS, how MaaS can contribute to resource efficiency, how MaaS can be supported by policy integration and other institutional issues.

     

    [1] European network for ITS deployment. www.ertico.com

    Ladda ner fulltext (pdf)
    FULLTEXT01
  • 66.
    Holmberg, Per-Erik
    et al.
    RISE, Swedish ICT, Viktoria.
    Selander, Lisen
    RISE, Swedish ICT, Viktoria.
    Karlsson, Mathias
    RISE, Swedish ICT, Viktoria.
    Johansson, Pontus
    RISE, Swedish ICT, Viktoria.
    GOTRIS - Göta Älv River Information Services Final report - Swedish2011Övrigt (Övrigt vetenskapligt)
    Ladda ner fulltext (pdf)
    fulltext
  • 67.
    Holmen, Lotta
    et al.
    RISE., Swedish ICT, Viktoria.
    Olsson, Oscar
    RISE., Swedish ICT, Viktoria.
    Fransson, Tommy
    RISE., Swedish ICT, Viktoria.
    Pettersson, Stefan
    RISE., Swedish ICT, Viktoria.
    Simulation Study of Power Limitation for City Trams2016Ingår i: Proceedings of the 11th ITS European Congress, 2016, artikel-id ITS-EU-SP0019Konferensbidrag (Refereegranskat)
    Abstract [en]

    In this paper, we describe a simulation study aimed at investigating whether a momentary limitation of the tram power-output can be effective in reducing current overload, while maintaining the tram performance at an acceptable level. The study was performed on a single-fed tram section in Gothenburg, Sweden. The simulation results indicate that an adaptive power output limitation, which is only activated when the current and current derivative is above certain limits, is effective in reducing current peaks, while still maintaining required tram performance. Thus, this method could be used to reduce or eliminate power failure on the tram net, without causing unacceptable tram delay.

    Ladda ner fulltext (pdf)
    fulltext
  • 68.
    Holmquist, Lars Erik
    RISE., Swedish ICT, Viktoria.
    On the Edge: Mobile 2.02007Ingår i: interactions, ISSN 1072-5520, E-ISSN 1558-3449, Vol. 14, s. 46-47Artikel i tidskrift (Refereegranskat)
    Ladda ner fulltext (pdf)
    fulltext
  • 69.
    Holmquist, Lars Erik
    RISE., Swedish ICT, Viktoria.
    Welcome to the mobile life!2006Ingår i: Interactions, ISSN 1072-5220, Vol. 13, nr 3Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The mobile phone is the dominating computer interface in the modern world as the capacity of the mobile terminals and networks are increasing. In Japan and other parts of Asia, more people are using their mobile phones to access the Internet instead of a PC. Mobile applications have to migrate to many different devices, so that it can work on a low resolution phone screen to a tablet PC at the kitchen table. Mobile services are highly dependent on network access, which can shift dramatically depending on whether it is using in a cafe with a high speed WLAN or in a forest with patchy GSM coverage. The eMoto project by the evolve group extends the possibilities of mobile messaging, which were a bad job of catching the nuances of human communication, by adding an emotional content. The interaction designers and researchers acknowledge that the latest applications will make the applications and services that are not just mobile computers but a natural part of mobile life.

  • 70.
    Holmquist, Lars Erik
    et al.
    RISE., Swedish ICT, Viktoria.
    Falk, Jennica
    RISE., Swedish ICT, Viktoria.
    Wigström, Joakim
    RISE., Swedish ICT, Viktoria.
    Supporting group collaboration with interpersonal awareness devices1999Ingår i: Personal and Ubiquitous Computing, ISSN 1617-4909, E-ISSN 1617-4917, Vol. 3, nr 1-2, s. 13-21Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    An Interpersonal Awareness Device, or IPAD, is a hand-held or wearable device designed to support awareness and collaboration between people who are in the physical vicinity of each other. An IPAD is designed to supply constant awareness information to users in any location without relying on an underlying infrastructure. We have constructed one such device, the Hummingbird, which gives members of a group continuous aural and visual indications when other group members are close. We have used the Hummingbirds in several different situations to explore how they affect group awareness. These experiences indicated that the Hummingbird increased awareness between group members, and that it could complement other forms of communication such as phone and email. In particular, we found the Hummingbird to be useful when a group of people were in an unfamiliar location, for instance during a trip, where no other communication support was available. We argue that IPADs such as the Hummingbird may fulfil important functions in modern work situations.

  • 71.
    Holmquist, Lars Erik
    et al.
    RISE., Swedish ICT, Viktoria.
    Gellersen, H. -W
    Kortuem, G.
    Schmidt, A.
    Strohbach, M.
    Antifakos, S.
    Michahelles, F.
    Schiele, B.
    Beigl, M.
    Mazé, R.
    Building Intelligent Environments with Smart-Its2004Ingår i: IEEE Computer Graphics and Applications, ISSN 0272-1716, E-ISSN 1558-1756, Vol. 24, nr 1, s. 56-64Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The development of Smart-Its for building smart environments is discussed. Smart-Its are small, self-contained, stick-on computers that attach to everyday objects. These augmented objects become soft media, enabling dynamic digital relationships with users and each other. A Smart-Its consists of a core board with a wireless transceiver to let the device communicate with other Smart-Its, plus a sensor board that gives the Smart-Its data about its sorroundings. The major advantage of the system is that it allows designers and researchers to construct responsive or intelligent environments.

  • 72.
    Holmquist, Lars Erik
    et al.
    RISE., Swedish ICT, Viktoria.
    Schmidt, A.
    Ullmer, B.
    Tangible interfaces in perspective: Guest editors' introduction2004Ingår i: Personal and Ubiquitous Computing, ISSN 1617-4909, E-ISSN 1617-4917, Vol. 8, nr 5, s. 291-293Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The use of physical objects as manipulable representations of information extends back to the dawn of civilization. Early research efforts toward tangible interfaces appear to have developed in parallel at several institutions. Fishkin has created a framework from the perspective of human-computer interaction, which offers researchers new tools for describing and contrasting tangible interfaces. At an editorial meeting, all papers were discussed at length by the three editors. In some cases, this meant choosing among submissions that were similar in scope, and picking the one that best supported our intentions for the issue. The paper by McNerney takes the Slot Machine as a departing point, and discusses an evolution of education-oriented tangible interface research at the MIT Media Lab. And Binder et al. discuss a series of efforts where tangible interfaces have been integrated into the working environment of students, under the auspices of a European project with partners from several countries.

  • 73.
    Holmström, Helena
    et al.
    RISE., Swedish ICT, Viktoria.
    Fitzgerald, B.
    Virtual community use for packaged software maintenance2006Ingår i: Journal of Organizational Computing and Electronic Commerce, ISSN 1091-9392, E-ISSN 1532-7744, Vol. 16, nr 3-4, s. 345-365Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, we investigated the use of virtual communities for involving distributed customers in the maintenance of packaged software. On the basis of an empirical study, we suggest that virtual communities can be usefully leveraged for corrective, adaptive, and perfective software maintenance. Specifically, the virtual community allowed for quick discovery of bugs and a rich interaction between developers and customers in the categories of corrective and adaptive software maintenance. However, although contributing also to the perfective category of software maintenance, this was the category in which several customer suggestions for modification were actually ignored by the developers. This implies that community use is indeed beneficial for maintenance related to coding and design errors as well as for maintenance of an adaptive character. However, it has limitations when associated with major changes such as software functionality addition or modification as those experienced in the category of perfective maintenance.

  • 74.
    Holmén, Lotta
    RISE., Swedish ICT, Viktoria.
    DistOpt: Sensitivity Analysis of Estimated Mass Errors2015Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The report describes a sensitivity study of an optimal controller for a hybrid truck, i.e. how sensitive is the controller to the difference between the estimated vehicle mass and the actual mass. The controller uses predictive information about road slope to optimize energy buffers (dissipated energy and battery state of charge) and thus minimize fuel consumption.

    The simulations show that variation in the vehicle mass significantly influences the average vehicle speed, which results from the speed profile that the controller computes. There is no clear observable trend in the fuel consumption as a function of ratio between estimated mass and actual mass that persists after the variations in average vehicle speed are taken into account. The main finding is instead that it is the variations in average speed that is what mainly effects the variations in fuel consumption, and that this is not a direct result of the variations in estimated mass.

    Ladda ner fulltext (pdf)
    fulltext
  • 75. Hu, X
    et al.
    Johannesson, L
    RISE., Swedish ICT, Viktoria.
    Murgovski, N
    Egardt, B
    Longevity-conscious dimensioning power management of the hybrid energy storage system in a fuel cell hybrid electric bus2014Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 137, s. 913-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Energy storage systems (ESSs) play an important role in the performance economy of electrified vehicles. Hybrid energy storage system (HESS) combining both lithium-ion cells supercapacitors is one of the most promising solutions. This paper discusses the optimal HESS dimensioning energy management of a fuel cell hybrid electric bus. Three novel contributions are added to the relevant literature. First, efficient convex programming is used to simultaneously optimize the HESS dimension (including sizes of both the lithium-ion battery pack the supercapacitor stack) the power allocation between the HESS the fuel cell system (FCS) of the hybrid bus. In the combined plant/controller optimization problem, a dynamic battery State-of-Health (SOH) model is integrated to quantitatively examine the impact of the battery replacement strategy on both the HESS size the bus economy. Second, the HESS the battery-only ESS options are systematically compared in the proposed optimization framework. Finally, the battery-health-perceptive HESS optimization outcome is contrasted to the ideal one neglecting the battery degradation (assuming that the battery is durable over the bus service period without deliberate power regulation)._x000D_

  • 76. Hu, X
    et al.
    Murgovski, N
    Johannesson Mårdh, L
    RISE., Swedish ICT, Viktoria.
    Egardt, B
    Energy Efficiency Analysis of a Series Plug-in Hybrid Electric Bus with Different Energy Management Strategies Battery Sizes2013Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 111, s. 1001-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper is concerned with the tank-to-wheel (TTW) analysis of a series plug-in hybrid_x000D_ electric bus operating in Gothenburg, Sweden. The bus line the powertrain model are described._x000D_ The definition the calculation method of the recuperation fuel-to-traction efficiencies are_x000D_ delineated for evaluating the TTW energy conversion. The two efficiencies are quantified and_x000D_ compared for two optimization-based energy management strategies, in which convex modeling and_x000D_ optimization are used. The impact of downsizing the battery on the two efficiencies is also investigated._x000D_

  • 77.
    Hu, Xiaosong
    et al.
    Chalmers University of Technology, Sweden.
    Murgovski, Nikolce
    Chalmers University of Technology, Sweden.
    Johannesson, Lars Mårdh
    RISE., Swedish ICT, Viktoria. Chalmers University of Technology, Sweden.
    Egardt, Bo
    Chalmers University of Technology, Sweden.
    Optimal Dimensioning Power Management of a Fuel Cell/Battery Hybrid Bus via Convex Programming2014Ingår i: IEEE/ASME transactions on mechatronics, ISSN 1083-4435, E-ISSN 1941-014X, Vol. 20, nr 1, s. 457-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper is concerned with the simultaneous optimal component sizing and power management of a fuel cell/battery hybrid bus. Existing studies solve the combined plant/controller optimization problem for fuel cell hybrid vehicles (FCHVs) by using methods with disadvantages of heavy computational burden and/or suboptimality, for which only a single driving profile was often considered. This paper adds three important contributions to the FCHVs-related literature. First, convex programming is extended to rapidly and efficiently optimize both the power management strategy and sizes of the fuel cell system (FCS) and the battery pack in the hybrid bus. The main purpose is to encourage more researchers and engineers in FCHVs field to utilize the new effective tool. Second, the influence of the driving pattern on the optimization result (both the component sizes and hydrogen economy) of the bus is systematically investigated by considering three different bus driving routes, including two standard testing cycles and a realistic bus line cycle with slope information in Gothenburg, Sweden. Finally, the sensitivity of the optimization outcome to the potential price decreases of the FCS and the battery is quantitatively examined.

  • 78.
    Hylving, L
    et al.
    RISE., Swedish ICT, Viktoria.
    Henfridsson, O
    RISE., Swedish ICT, Viktoria.
    Selander, L
    The Role of Dominant Design in a Product Developing Firm's Digital Innovation2012Ingår i: Journal of Information Technology Theory and Application, ISSN 1552-6496, E-ISSN 1532-4516, Vol. 13, nr 2, s. 5-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Digital technology offers new options for product-developing firms. However, to reap the benefits of digital technology, firms need to handle the tensions between these options the institutionalized practices established over long periods of incremental innovation. We report on a twenty month intensive case study of a global automaker€™s efforts to innovate instrument clusters explore the influencing role of established innovation practices. We develop a conceptual model for understanding how digital technology shapes, is conditioned by, the dominant design of a product class. Our research contributes to the emerging literature of digital innovation offers lessons learned for established firms dealing with the contradictory logics of digitized products_x000D_

  • 79.
    Hylving, Lena
    RISE., Swedish ICT, Viktoria. University of Oslo, Norway.
    Competing Values in the Era of Digitalization2015Ingår i: 2015 48th Hawaii International Conference on System Sciences, 2015, s. 4161-4170, artikel-id 7070318Konferensbidrag (Refereegranskat)
    Abstract [en]

    This case study examines three different digital innovation projects within AutoInc that are compared with established and institutionalized processes. By using the competing values framework as a theoretical lens we present how dynamic capabilities occur in a firm trying to meet demands originating from digitalization. The paper points out that established socio-technical congruences are challenged and pinpoint the need for organizations to find ways to embraze new initiatives and learnings in the era of digitalization. While such a change needs longterm commitment and vision, this study presents three informal enablers for experimental processes in an organizational culture focusing on control and stability. With 19 interviews and participartory observations at site we have identified these enablers as timing, persistence and contacts. 

  • 80.
    Hylving, Lena
    RISE., Swedish ICT, Viktoria.
    Digitalization Dynamics: User Interface Innovation in an Automotive Setting2015Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
  • 81.
    Hylving, Lena
    et al.
    RISE., Swedish ICT, Viktoria.
    Koutsikouri, Dina
    University of Gothenburg, Sweden.
    Putting Phronesis to Work in Digital Innovation2016Ingår i: 2016 49th Hawaii International Conference on System Sciences (HICSS), 2016, s. 4624-4633, artikel-id 7427760Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper uses the Aristotelian concept of phronesis (practical wisdom) as a sensitizing device to explore digital materiality in relation to user experience. We studied a digital innovation called Prudence, and observed that it possesses material properties including sensitivity to particulars, interactive ability, open-mindedness, and future orientation, making it context-aware. These properties quintessentially enabled the solution to be ‘phronetic’, and attune to its user’s flow of activities and routines, to deliver ‘good’ user experiences. The study provides an opportunity for extending and strengthening current and emergent theories on digital materiality by incorporating phronesis as a vital ingredient to understand experiential computing. It also highlights the importance of embracing value-rationality to attain the kind of user delight that goes beyond what can be pre-defined in a specification. Overall, the paper contributes to show the fruitfulness of appropriating the notion of phronesis into the field of digital innovation. 

  • 82.
    Håkansson, Maria
    et al.
    RISE., Swedish ICT, Viktoria.
    Rost, Mattias
    RISE., Swedish ICT, Viktoria.
    Holmquist, Lars Erik
    RISE., Swedish ICT, SICS.
    Gifts from friends and strangers: a study of mobile music sharing2007Konferensbidrag (Refereegranskat)
    Abstract [en]

    Mobile technology has turned the traditionally collective activity of enjoying music into an often private one. New technologies such as wireless ad hoc networks have the potential to re-connect listeners who are now separated by headphones. We report on a field study of Push!Music, a novel mobile music sharing system . Push!Music allows both manual and automatic sharing of music between users through ad hoc wireless networking, and also provides a social awareness of other users nearby. The system was used by 13 subjects for three weeks. In post-study interviews, we identified four categories of results: social awareness, sharing music with friends, sharing music with strangers, and sharing automatically. Based on this, we present implications for design that can be applied not only to mobile music sharing systems, but to mobile media sharing in general: Allow division into active and passive use; enhance the awareness of who, where and when; support reciprocity; and finally, support identity and impression management.

    Ladda ner fulltext (pdf)
    fulltext
  • 83.
    Håkansson, Maria
    et al.
    RISE., Swedish ICT, Viktoria.
    Rost, Mattias
    RISE., Swedish ICT, Viktoria.
    Jacobsson, Mattias
    RISE., Swedish ICT, SICS, Computer Systems Laboratory.
    Holmquist, Lars Erik
    RISE., Swedish ICT, Viktoria.
    Facilitating Mobile Music Sharing and Social Interaction with Push!Music2007Konferensbidrag (Refereegranskat)
    Abstract [en]

    Push!Music is a novel mobile music listening and sharing system, where users automatically receive songs that have autonomously recommended themselves from nearby players depending on similar listening behaviour and music history. Push!Music also enables users to wirelessly send songs between each other as personal recommendations. We conducted a two-week preliminary user study of Push!Music, where a group of five friends used the application in their everyday life. We learned for example that the shared music in Push!Music became a start for social interaction and that received songs in general were highly appreciated and could be looked upon as ‘treats’.

    Ladda ner fulltext (pdf)
    fulltext
  • 84. Höglund, L
    et al.
    Holtz, P O
    Pettersson, H
    Asplund, C
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Almqvist, S
    Malm, H
    Petrini, E
    Andersson, J Y
    RISE., Swedish ICT, Viktoria.
    Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors2008Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, s. 203512-Artikel i tidskrift (Refereegranskat)
  • 85. Höglund, L
    et al.
    Holtz, P O
    Pettersson, H
    Asplund, C
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Almqvist, S
    Smuk, S
    Petrini, E
    Andersson, JY
    RISE., Swedish ICT, Viktoria.
    Bias temperature dependence of the escape processes in quantum dots-in-a-well infrared photodetectors2008Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, s. 1035201-Artikel i tidskrift (Refereegranskat)
  • 86. Höglund, L
    et al.
    Holtz, P O
      Pettersson, H
    Asplund, C
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Malm, H
    Almqvist, S
    Petrini, E
    Andersson, J Y
    RISE., Swedish ICT, Viktoria.
    Optical pumping as artificial doping in quantum dots-in-a-well infrared photodetectors2009Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 94, s. 53503-Artikel i tidskrift (Refereegranskat)
  • 87. Höglund, L
    et al.
    Karlsson, K F
    Holtz, P O
    Pettersson, H
    Pistol, M E
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Almqvist, S
    Asplund, C
    Malm, H
    Petrini, E
    Andersson, J Y
    RISE., Swedish ICT, Viktoria.
    Energy level scheme of InAs/InxGa1?xAs/GaAs quantum-dots-in-a-well infrared photodetector structures2010Ingår i: PHYSICAL REVIEW, Vol. b82, s. 35314-Artikel i tidskrift (Refereegranskat)
  • 88. Höglund, L
    et al.
    Petrini, E
    Asplund, C
    Malm, H
    Andersson, J Y
    RISE., Swedish ICT, Viktoria.
    Holtz, P O
    Optimising uniformity of InAs/(InGaAs)/GaAs quantum dots grown by metal organic vapor phase epitaxy2006Ingår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, s. 5525-Artikel i tidskrift (Refereegranskat)
  • 89. Ihlström, C.
    et al.
    Henfridsson, Ola
    RISE., Swedish ICT, Viktoria.
    Online newspapers in Scandinavia: A longitudinal study of genre change and interdependency2005Ingår i: Information Technology and People, ISSN 0959-3845, E-ISSN 1758-5813, Vol. 18, nr 2, s. 172-192Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose - To examine the evolution of the online newspaper genre in Scandinavia. To provide an understanding of the institutional context in which online newspapers initially were produced and modified over time. Design/methodology/approach - A longitudinal study of three different types of newspapers in three Scandinavian countries. The study is based on interviews with newspaper representatives conducted during recurring visits in 1996, 1999 and 2002, and web page analysis of their online newspapers. Findings - The study illustrates how online newspapers have established a number of communicative practices significant for recognizing them as a distinct digital genre, and it outlines a set of institutional factors shaping the ongoing change of these newspapers. In addition, the study demonstrates the emergence of sequential interdependencies between online and printed news. Originality/value - The focus on Scandinavian newspapers in this paper complements studies conducted in other parts of the world regarding online newspaper genre evolution.

  • 90.
    Ihlström, Carina
    et al.
    RISE., Swedish ICT, Viktoria.
    Nilsson, Malin
    E-Business Adoption by SMEs - Prerequisites and Attitudes of SMEs in a Swedish Network2003Ingår i: Journal of Organizational Computing and Electronic Commerce, ISSN 1091-9392, E-ISSN 1532-7744, Vol. 13, nr 3-4, s. 211-223Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The context for this research is the transformation process of small and medium-sized enterprises (SMEs) from traditional (t-) businesses toward e-businesses and the accompanying development of the knowledge and competence among employees. SMEs constitute a great part of the Swedish industry and economy. This and the fact that they have special prerequisites concerning human and technology resources makes SMEs an interesting research focus when looking at the transformation process toward e-business. The aim of this research is to investigate SMEs with the purpose of designing, implementing, and evaluating information technology-supported activities that will allow SMEs to approach e-business. This article presents results from parts of an ongoing study, that involves seven SMEs. This study will be conducted in two main phases: first, informative and preparatory activities and second, business transformation and competence development activities. This article focuses on the first phase of the study, but an insight in its current status and further research is given. The underlying prerequisites for SMEs as well as the research approach are described. A working model is presented that illustrates stages of maturity for taking an enterprise toward e-business. The last sections present the research design, that is, planning, actions, observations, and reflections of the study up until now. New actions to take are discussed at the end of this article.

  • 91.
    Jacobsson, Mattias
    et al.
    RISE., Swedish ICT, SICS, Computer Systems Laboratory.
    Bodin, Johan
    Holmquist, Lars Erik
    RISE., Swedish ICT, Viktoria.
    The see-Puck: a platform for exploring human-robot relationships2008Ingår i: ACM Conference on Human Factors in Computing Systems, 2008, 1, , s. 4Konferensbidrag (Refereegranskat)
    Abstract [en]

    We present the see-Puck, a round display module that extends an open robot platform, the e-Puck. It holds 148 LEDs (light emitting diodes) to enable the presentation of eye-catching visual animated patterns, while keeping hardware costs and energy consumption at a minimum. The see-Puck was a result of a study of future robot applications, where relationship and interaction qualities found in owners of unusual pets (e.g. spiders, snakes, and lizards) were transferred to the robotic domain. In our first proof-of-concept application, humans and robots can engage in a playful open ended interaction. We argue that open interactive robot platforms such as the see-Puck point to opportunities not only in robotics but also future user interfaces and ubiquitous computing.

  • 92.
    Jacobsson, Mattias
    et al.
    RISE., Swedish ICT, SICS, Computer Systems Laboratory.
    Ljungblad, Sara
    RISE., Swedish ICT, Viktoria.
    Bodin, Johan
    RISE., Swedish ICT, Viktoria.
    Knurek, Jeffrey
    RISE., Swedish ICT, Viktoria.
    Holmquist, Lars Erik
    RISE., Swedish ICT, SICS.
    GlowBots: Robots that Evolve Relationships2007Konferensbidrag (Refereegranskat)
    Abstract [en]

    GlowBots are small wheeled robots that develop complex relationships between each other and with their owner. They develop attractive patterns which are affected both by user interaction and communication between the robots. The project shows how robots can interact with humans in subtle and sustainable ways for entertainment and enjoyment.

    Ladda ner fulltext (pdf)
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  • 93.
    Johannesson, Lars
    et al.
    RISE., Swedish ICT, Viktoria.
    Nilsson, Magnus
    RISE., Swedish ICT, Viktoria.
    Murgovski, Nikolce
    Chalmers University of Technology, Sweden.
    Look-ahead Vehicle Energy Management with Traffic Predictions2015Ingår i: IFAC-PapersOnLine, E-ISSN 2405-8963, Vol. 48, nr 15, s. 244-251Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a vehicle energy management system that uses information about upcoming topography and speed limits along the planned route to schedule the speed and the gear shifts of a heavy diesel truck. The proposed control scheme divides the predictive control problem into two layers that operate with different update frequencies and prediction horizons. The focus in the paper is on the top layer that plans the vehicle speed in a convex optimization problem leaving the gear decision to be optimized in the lower layer in a dynamic program. The paper describes how predictive information of the movement pattern of surrounding vehicles can be incorporated into the convex optimization of the vehicle speed by using a moving time window constraint.

  • 94. Juell-Skielse, G
    et al.
    Juell-Skielse, E
    Hjalmarsson, Anders
    RISE., Swedish ICT, Viktoria.
    Johannesson, P
    Rudmark, Daniel
    What happens next? – A survey of the afterlife of innovation contests2014Ingår i: Proceedings of 2014 Pre-ECIS Workshop Rethinking Information Systems in the Public Sector: Bridging Academia and Public service, AIS SIG eGovernment , 2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    Innovation contests are becoming popular instruments for stimulating development of digital services using open data. However, experience indicates that only a limited number of the results developed during these events become viable digital services attracting a significant user base. Hence, an unresolved question is how organizers choose to support the service development process after the contest is concluded. To further deepen our knowledge about the design of digital innovation contests and the support for the processes after the contests are concluded, we conducted a survey of the websites of 33 digital innovation contests.

    Ladda ner fulltext (pdf)
    fulltext
  • 95.
    Juell-Skielse, Gustaf
    et al.
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Hjalmarsson, Anders
    RISE., Swedish ICT, Viktoria.
    En verktygslåda för innovationstävlingar2014Ingår i: CIO Sweden, Vol. 2014, nr Nov, s. 32-34Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [sv]

    Att ordna tävlingar för utvecklare blir ett allt vanligare sätt att generera nya idéer. Ett svenskt projekt tar nu fram verktyg för dig som vill ordna en egen innovationstävling, och kartlägger fallgropar och motivationsfaktorer.

  • 96. Junique, S
    et al.
    Agren, D
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Almqvist, S
    Noharet, B
    Andersson, J
    RISE., Swedish ICT, Viktoria.
    A Modulating Retro-Reflector for Free-Space Optical Communication2006Ingår i: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 18, nr 1, s. 85-87Artikel i tidskrift (Refereegranskat)
  • 97. Junique, S
    et al.
    Wang, Q
    RISE., Swedish ICT, Acreo.
    Almqvist, S
    Guo, J
    Martijn, H
    Noharet, B
    Andersson, JY
    RISE., Swedish ICT, Viktoria.
    GaAs-based multiple-quantum-well spatial light modulators fabricated by a wafer-scale process2005Ingår i: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 44, nr 9, s. 1635-41Artikel i tidskrift (Refereegranskat)
  • 98. Junique, S
    et al.
    Wang, Q
    Almqvist, S
    Noharet, B
    Andersson, JY    
    RISE., Swedish ICT, Viktoria.
    Large-area, three-state, binary amplitude binary phase vertical-cavity multiple quantum well electroabsorption modulator2007Ingår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 15, nr 14, s. 8566-75Artikel i tidskrift (Refereegranskat)
  • 99.
    Karim, Amir
    et al.
    RISE., Swedish ICT, Acreo.
    Marcks von Wurtemberg, Rickard
    IRnova AB, Sweden.
    Asplund, Carl
    IRnova AB, Sweden.
    Malm, Hedda
    IRnova AB, Sweden.
    Andersson, Jan Y.
    RISE., Swedish ICT, Viktoria.
    Plis, Elena A.
    University of New Mexico, USA.
    Krishna, Sanjay
    University of New Mexico, USA.
    Characterization of InAs/GaSb type€II superlattice photodiodes for mid€wave IR with different mesa sidewall passivation schemes2012Ingår i: Physica Status Solidi. C, Current topics in solid state physics, ISSN 1610-1634, E-ISSN 1610-1642, Vol. c9, nr 7, s. 1690-2Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We report on the electrical material characterization of InAs/GaSb type-II superlattice (T2SL) mid-wave infrared (MWIR) photodiodes with different passivation schemes on the mesa-sidewalls with significant differences in the resulting low temperature dark currents. Devices fabricated by dry etching passivated with polymerized photoresist, show orders of magnitude lower dark currents as compared to unpassivated devices. The mesa side walls were examined using high resolution transmission electron microscopy (HRTEM) with a special focus on the interface between the superlattice material the dielectric passivation. Material analysis on nanometer scale at the mesa sidewall interface was performed using energy dispersive X-ray (EDX) spectrometry. EDX line scans were obtained from interfaces for different passivated unpassivated devices, using the highly focused electron beam in TEM, to investigate the chemical compositions. The unpassivated photoresist-passivated mesas, with different electrical properties, revealed different sidewall morphologies compositions. An oxygen containing layer was observed in photoresist-passivated devices covering the whole mesa sidewall. We think this plays a role in reducing surface leakage dark current. In HR-TEM the mesa sidewall topography reveals preferential etching of one superlattice component as previously observed. Nevertheless, the dielectric material covers the sidewall uniformly.

  • 100. Karlsson, M
    et al.
    Holmberg, P
    RISE., Swedish ICT, Viktoria.
    Grundevik, P
    SSPA.
    Södahl, B
    Chalmers.
    GOTRIS A-rapport, Vinnova utmaningsdriven Innovation: Slut rapport: Hållbara städer2012Rapport (Övrigt vetenskapligt)
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