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  • 201.
    Whittle, Jon
    et al.
    Lancaster University, UK.
    Hutchinson, John
    Lancaster University, UK.
    Rouncefield, Mark
    Lancaster University, UK.
    Burden, Håkan
    RISE., Swedish ICT, Viktoria. Chalmers University of Technology, Sweden.
    Heldal, Rogardt
    Chalmers University of Technology, Sweden.
    A taxonomy of tool-related issues affecting the adoption of model-driven engineering2017Ingår i: Software and Systems Modeling, ISSN 1619-1366, E-ISSN 1619-1374, Vol. 16, nr 2, s. 313-331Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Although poor tool support is often blamed for the low uptake of model-driven engineering (MDE), recent studies have shown that adoption problems are as likely to be down to social and organizational factors as with tooling issues. This article discusses the impact of tools on MDE adoption and practice and does so while placing tooling within a broader organizational context. The article revisits previous data on MDE use in industry (19 in-depth interviews with MDE practitioners) and reanalyzes that data through the specific lens of MDE tools in an attempt to identify and categorize the issues that users had with the tools they adopted. In addition, the article presents new data: 20 new interviews in two specific companies—and analyzes it through the same lens. A key contribution of the paper is a loose taxonomy of tool-related considerations, based on empirical industry data, which can be used to reflect on the tooling landscape as well as inform future research on MDE tools.

  • 202.
    Wik, Torsten
    et al.
    Chalmers University of Technology, Sweden.
    Fridholm, Björn
    RISE., Swedish ICT, Viktoria.
    Kuusisto, Hannes
    Volvo Car Corporation, Sweden.
    Implementation robustness of an analytically based battery state of power2015Ingår i: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 287, s. 448-457Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Today it is common practice to use simplified equivalent circuit models for predicting the short term behaviour of the voltage and current during charging and discharging battery cells. If the circuit parameters are assumed to be unchanged the response for a given open circuit voltage (OCV) will be the solution to a linear ordinary differential equation. This means that for given voltage limits the maximum charge and discharge powers can be analytically derived. In advanced battery management units, such as those used for hybrid electric vehicles, it is central to know how much that can be charged or discharged within a certain range of time, which is one definition of state of power (SoP). Using the linearizing assumption we derive a method for an adaptive estimation of the state of power based on incremental analysis. The method is easy to implement and have two tuning parameters that are straightforward to relate to. Using frequency analysis the method is analytically proven to have very strong robustness properties. The risk of exceeding voltage limits by effectively applying the maximum charge or discharge currents is marginal in spite of large circuit parameter errors, unmodelled hysteresis, unknown OCV and static nonlinearities.

  • 203.
    Williander, M
    et al.
    RISE., Swedish ICT, Viktoria.
    Stålstad, C
    Four Business Models for a Fast Commercialization of PlugIn Vehicles2013Ingår i: Electric Vehicle Business Models, nr 7, artikel-id 34Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    Plug-in vehicles are one important means to lower CO2 emissions from the transport sector. Despite this, uptake is slow. This can be well explained by theory on social dilemma problems and on diffusion of innovations. The traditional “sell-and-disengage” business model is not suitable for plug-in cars. Using an entrepre-neurial business model generation process we have developed four alternative business models that address important factors for the speed of which customers adopt an innovation.  The results show that alternative business models are neces-sary, but they cannot alone ensure a fast, and lasting, commercialization of plug-in cars. As a complement, governments will have to take measures to control exter-nal factors that influence the viability of business models for plug-in cars.

  • 204.
    Williander, Mats
    et al.
    RISE., Swedish ICT, Viktoria.
    Linder, Marcus
    RISE., Swedish ICT, Viktoria.
    Nyström, Thomas
    RISE., Swedish ICT, Viktoria.
    The organizational impacts of a product-service based business model innovation process in an incumbent manufacturing firm2015Ingår i: 22nd Innovation Product Development Management Conference (IPDMC 2015), 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    AThe circular economy, it is hoped, is one possible way to radically improveenvironmental sustainability. One suggested path towards a more environmentallysustainable industry that is part of the circular economy concept is for firms to movefrom product offerings to product-service offerings. Such offerings requiresubstantially different business models, such that business model innovation isneeded. In such situations of innovation and change, core capabilities can becomecore rigidities in incumbent firms.Lean startup methodologies are claimed to rapidly and cost effectively developvalidated business models for startup companies. This set of methods is designed forstartup companies but may be useful also for incumbent firms. A collaborative andinterventionist research project together with a company with a long business historytested whether one of these methods, Customer Development, could be of use, thechallenges of using it, and if and how these challenges could be addressed. At thisfirm, it was found that the Customer Development process can be very useful andpotentially work as intended, but requires a conscious setup of the project team. Itseems reasonable to expect that core competencies for the business model in currentuse would become core rigidities that would have jeopardized both the CustomerDevelopment process and its business model outcome without external help to reflectupon important but organizationally embedded presumptions

  • 205. Xiaosong, H
    et al.
    Murgovski, N
    Johannesson, L
    RISE., Swedish ICT, Viktoria.
    Egardt, B
    Comparison of three electrochemical energy buffers applied to a hybrid bus powertrain with simultaneous optimal sizing energy management2014Ingår i: IEEE transactions on intelligent transportation systems (Print), ISSN 1524-9050, E-ISSN 1558-0016, Vol. 15, nr 3, s. 1193-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper comparatively examines three different electrochemical energy storage systems (ESSs), i.e., a Li-ion battery pack, a supercapacitor pack, a dual buffer, for a hybrid bus powertrain operated in Gothenburg, Sweden. Existing studies focus on comparing these ESSs, in terms of either general attributes (e.g., energy density power density) or their implications to the fuel economy of hybrid vehicles with a heuristic/nonoptimal ESS size power management strategy. This paper adds four original contributions to the related literature. First, the three ESSs are compared in a framework of simultaneous optimal ESS sizing energy management, where the ESSs can serve the powertrain in the most cost-effective manner. Second, convex optimization is used to implement the framework, which allows the hybrid powertrain designers/integrators to rapidly optimally perform integrated ESS selection, sizing, power management. Third, both hybrid electric vehicle (HEV) plug-in HEV (PHEV) scenarios for the powertrain are considered, in order to systematically examine how different the ESS requirements are for HEV PHEV applications. Finally, a sensitivity analysis is carried out to evaluate how price variations of the onboard energy carriers affect the results conclusions._x000D_

  • 206. Yoo, Y.
    et al.
    Henfridsson, Ola
    RISE., Swedish ICT, Viktoria.
    Lyytinen, K.
    The new organizing logic of digital innovation: An agenda for information systems research2010Ingår i: Information systems research, ISSN 1047-7047, E-ISSN 1526-5536, Vol. 21, nr 4, s. 724-735Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this essay, we argue that pervasive digitization gives birth to a new type of product architecture: the layered modular architecture. The layered modular architecture extends the modular architecture of physical products by incorporating four loosely coupled layers of devices, networks, services, and contents created by digital technology. We posit that this new architecture instigates profound changes in the ways that firms organize for innovation in the future. We develop (1) a conceptual framework to describe the emerging organizing logic of digital innovation and (2) an information systems research agenda for digital strategy and the creation and management of corporate information technology infrastructures. © 2010 INFORMS.

  • 207.
    Yu, Anne
    et al.
    RISE., Swedish ICT, Viktoria.
    Pettersson, Stefan
    RISE., Swedish ICT, Viktoria.
    Wedlin, Johan
    RISE., Swedish ICT, Viktoria.
    Jin, Yong
    Shanghai International Automobile City Group, China.
    Yu, Jie
    Shanghai International Automobile City Group, China.
    A user study on station-based EV car sharing in Shanghai2016Ingår i: EVS 2016 - 29th International Electric Vehicle Symposium, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    There has been a trend in car sharing and especially electric car sharing over the last decade. This study aims at developing knowledge of users and searching market opportunities for the electric car sharing service EVCARD in Shanghai, China. EVCARD originates in the suburban Jiading district and is planning on expanding the business to the centre of Shanghai. Survey methods and tools have been applied in the study to acquire user data. The analysis was designed to answer research questions related to users' attitudes and expectations about the EVCARD service and to provide suggestions for system improvement.

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