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  • 1651.
    Zhang, Yan
    et al.
    Department of Informatics, University of Oslo, Oslo, Norway.
    Jonsson, Magnus
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Li, Minqiang
    Department of Information Management and Management Science, Tianjin University, Tianjin, China.
    Guest editorial special issue on industrial IoT systems and applications2017Inngår i: IEEE Systems Journal, ISSN 1932-8184, E-ISSN 1937-9234, Vol. 11, nr 3, s. 1337-1339, artikkel-id 8052330Artikkel i tidsskrift (Annet vitenskapelig)
  • 1652.
    Zhang, Yan
    et al.
    School of Electrical and Electronics Engineering, Nanyang Technological University, Singapore, Singapore.
    Jonsson, MagnusHögskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).Li, MinqiangDepartment of Information Management and Management Science, College of Management and Economics, Tianjin University, Tianjin Shi, China.
    Special Issue on Industrial IoT Systems and Applications2017Collection/Antologi (Fagfellevurdert)
  • 1653.
    Zhao, Yang
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Tillämpad matematik och fysik (MPE-lab).
    Zhang, Min
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Tillämpad matematik och fysik (MPE-lab).
    The Ising Model on a Heavy Gravity Portfolio Applied to Default Contagion2011Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    In this paper we introduce a model of default contagion in the financail market. The structure of the companies are represented by a Heavy Gravity Portfolio, where we assume there are N sectors in the market and in each sector i, there is one big trader and ni supply companies.The supply companies in each sector are directly inuenced by the bigtrader and the big traders are also pairwise interacting with each other.This development of the Ising model is called Heavy gravity portfolioand according to this, the relation between expectation and correlationof the default of companies are derived by means of simulations utilisingthe Gibbs sampler. Finally methods for maximum likelihood estimationand for a likelihood ratio test of the interaction parameter in the modelare derived.

  • 1654.
    Zhelezov, Dmitry
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Tillämpad matematik och fysik (MPE-lab).
    Yamshchikov, Ivan
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Tillämpad matematik och fysik (MPE-lab).
    Liquidity and optimal consumption with random income2011Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    In the first part of our work we focus on the model of the optimal consumption with a random income. We provide the three dimensional equation for this model, demonstrate the reduction to the two dimensional case and provide for two different utility functions the full point-symmetries' analysis of the equations. We also demonstrate that for the logarithmic utility there exists a unique and smooth viscosity solution the existence of which as far as we know was never demonstrated before.

    In the second part of our work we develop the concept of the empirical liquidity measure. We provide the retrospective view of the works on this issue, discuss the proposed definitions and develop our own empirical measure based on the intuitive mathematical model and comprising several features of the definitions that existed before. Then we verify the measure provided on the real data from the market and demonstrate the advantages of the proposed value for measuring the illiquidity.

  • 1655.
    Zheyuan, Liu
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Evaluation of platoon Application Enabled by Contemporary ETSI ITS-G5 Standards2015Independent thesis Advanced level (degree of Master (Two Years)), 80 poäng / 120 hpOppgave
  • 1656.
    Zhuang, Weihua
    et al.
    University of Waterloo, Ontario, Canada.
    Jamalipour, Abbas
    University of Sydney, Sydney, New South Wales, Australia.
    Bai, Fan
    Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
    Vinel, Alexey
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Emerging Technologies, Applications, and Standardizations for Connecting Vehicles: [From the Guest Editors]2015Inngår i: IEEE Vehicular Technology Magazine, ISSN 1556-6072, E-ISSN 1556-6080, Vol. 10, nr 4, s. 33-35Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The articles in this special section focus on the state of the art in the emerging technology for vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications, the latest development in standardizations and regulations, and potential services and applications for vehicles on roads. © Copyright 2015 IEEE

  • 1657.
    Zhuang, Weihua
    et al.
    Department of Electrical and Computer Engineering, University of Waterloo, ON, Canada.
    Jamalipour, Abbas
    University of Sydney, Sidney, Australia.
    Bai, Fan
    Caign, Universitarnegie Mellon University, University of Illinois at Urbana-Champy of Southern California, United States.
    Vinel, Alexey
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Emerging Technologies, Applications, and Standardizations for Connecting Vehicles (Part II)2017Inngår i: IEEE Vehicular Technology Magazine, ISSN 1556-6072, E-ISSN 1556-6080, Vol. 12, nr 2, s. 23-25Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
  • 1658.
    Zimmerman, Ewa
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Disseminating information within municipalities2005Inngår i: BIR 2005: Proceedings of the 4th International Conference on Business Informatics Research / [ed] Per Backlund, Sven Carlsson, Eva Söderström, Skövde: Skövde University , 2005, s. 117-126Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A trend today is to disseminate information fast and make it available for everyone. In municipalities the implementation and use of intranets as a communication channel for the dissemination of information is growing. All employees in municipalities are not working in an office and have limited access to the technology; they can not visit the intranet every day. This paper presents a study of how available communication channels are used to disseminate information to employees in municipalities. The results are presented as guidelines promoting the use of intranet as a communication channel and design of further research is presented. © The authors, except as noted.

  • 1659.
    Zimmerman, Ewa
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab). Department of Computer and Systems Sciences, Stockholm University, Stockholm, Sweden.
    Guidelines for enhanced Intranet use: a study of dissemination of information to field workers within municipalities2004Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The development and use of new technology enables our society and organizations to disseminate information very quickly. Citizens in the industrialized world have access to information using the World Wide Web and organizations can provide both customers and employees with information using intranets. This thesis investigates how municipalities disseminate information to employees using intranets or traditional communication channels such as telephone, mail, paper handouts and weekly-letters.

    Municipalities are good examples of organizations that have employees with limited access to technology and where a considerable number of the employees are working out in the field and do not have access to an intranet and its content during their daily work. The municipalities in Sweden implement intranets to disseminate information with the purpose of efficient communication with everyone in the organization simultaneously and to promote cooperation between various departments.

    A study of 10 municipalities in Sweden focusing on the dissemination of information through intranets is presented. Previous research shows that the content must be relevant, fill a need and add a value for the users otherwise the motivation for using it is lost. Therefore, an investigation of the publishing process and the routines of the information provider have been carried out with the purpose of determining how the intranets can be designed to satisfy these requirements. The most important question is how the users actually use an intranet when they have limited access to technical resources. To answer this question users have been interviewed to investigate their motivation, attitude and the information need in relation to dissemination. During the investigation three municipality employees were interviewed, the information provider, the middle-managers and the field workers. The interviews have focused on the following themes; the user's satisfaction, the content of the information, the information strategies, the available and used communication channels and finally the knowledge and awareness possessed by the actors regarding the potentials of the intranet.

    The results of the study will be presented as recommendations for municipalities and other organizations with a similar structure. The usefulness and the relevance of the guidelines were established through evaluation with the participating actors. The guidelines will support the organizations and dissemination of information to field workers in public organizations. They will also raise awareness and support the potentials of the intranet with regards to communication opportunities, discussion forums and sharing of experiences between departments.

  • 1660.
    Zimmerman, Ewa
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Cronquist, Björn
    Kristianstad University, SE-291 88 Kristianstad, Sweden.
    Emergent functions in Intranet information management2003Inngår i: Knowledge Management in Electronic Government / [ed] Wimmer, M.A., Springer Berlin/Heidelberg, 2003, s. 186-191Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Organizations and municipalities implements advanced information technology, intranets, in order to enhance information management within the organization.. This technology is implemented with great reliance on the technology aspect. New functions emerge as a consequence of technology, functions not planned for. This paper puts focus one such function, the key persons responsible for publishing on intranets. A descriptive study shows that these persons do exist and describes some problems they appreciate.

  • 1661.
    Zimmerman, Ewa
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Smedley, Jo
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS).
    ERP Implementations – a Never Ending Story?2006Inngår i: Proceedings of the 29th IRIS, IRIS , 2006, s. 12-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    ERP (Enterprise Resource Planning) systems integrate software solutions that support the integration of all information flows leading to organizational changes. Thispaper outlines a research proposal concerning the implementation and use of ERP systems in organizations. Taking an information and knowledge perspective on organization from the management and consultant perspective, we present issues that are of interest when ERP systems are implemented and used. The paper ends with discussion concerning future work.

  • 1662.
    Åhlander, Anders
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Efficient parallell architectures for future radar signal processing2007Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The processing demands on future embedded radar signal processors may stretch to several trillions of floating-point operations per second (TFLOPS). This is an increase of two to three orders of magnitude realtive to the requirements of today. Still, the tight size and power constraints are unchanged. To meet this, new, highly parallel computer systems are needed. The systems should efficiently deliver very high performance as well as being general enough. Another challenge for future signal processors is the requirement for having huge working memories that are accessed in complicated patterns.

    This thesis analyses the challenges of two classes of radar signal processing applications, namely Space-Time Adaptive Processing (STAP), which represents performance-intensive applications, and Synthetic Aperture Radar (SAR) processing, which represents memory-intensive applications. In addition to the actual performance and memory aspects of the applications, the desire for low-effort application development and maintenance is taken into consideration.

    A multiple SIMD architecture is proposed for the STAP calculations. This architecture gives a combination of the high computational density in the SIMD processing modules with the overall flexibility provided on the system level. An embedded signal processing system based on the architecture is shown to be capable of TFLOPS class performance using standard CMOS VLSI technology available in the year 2001. The system is, for the given application domain, considered to have the same generality as commercial off-the-shelf (COTS) hardware, but has several years of time lead over COTS with regard to the computational performance.

    The studied SAR processing is characterized by operating on huge data sets and having varying, non-linear data access paths. For this, algorithm solutions and execution schemes in inerplay with a system parallelization approach are proposed. It is shown that it is possible to obtain efficient memory accesses, despite the omplicated memory access patterns. It is also shown that the computational burden from complex interpolation kernels can be reduced through extensive calculation reuse.

    Efficient engineering of complex applications in this context is discussed. The use of semi-transparent, platform-based development is demonstrated for STAP and SAR, and advocated for obtaining high engineering defficiency and long system sustainability, as well as high performance efficiency.

    The overall conclusion drawn from this work is that a solid knowledge of the application domain and its future requirements, in combination with an understanding of its interaction with computational architectures, potentially enables several years of lead time in the realization of new, advanced signal prodcessing products. The important requirements on programmability and sustainability must also be taken into account in order to achieve a viable signal processing solution.

  • 1663.
    Åhlander, Anders
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Hellsten, H.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Lind, K.
    Saab Microwave Systems, Gothenburg, Sweden.
    Lindgren, J.
    Saab Microwave Systems, Gothenburg, Sweden.
    Svensson, Bertil
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Architectural challenges in memory-intensive, real-time image forming2007Inngår i: International Conference on Parallel Processing, 2007. ICPP 2007 / [ed] Li Jiandong, IEEE Press, 2007, s. 35-45Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The real-time image forming in future, high-end synthetic aperture radar systems is an example of an application that puts new demands on computer architectures. The initial question is whether it is at all possible to meet the demands with state-of-the-art technology or foreseeable new technology. It is therefore crucial to understand the computational flow, with its associated memory, bandwidth and processing demands. In this paper we analyse the application in order to, primarily, understand the algorithms and identify the challenges they present on a basic architectural level. The processing in the radar system is characterized by working on huge data sets, having complex memory access patterns, and doing real-time compensations for flight path errors. We propose algorithm solutions and execution schemes in interplay with a two-level (coarse-grain/fine-grain) system parallelization approach, and we provide approximate models on which the demands are quantified. In particular, we consider the choice of method for the performance-intensive data interpolations. This choice presents a trade-off problem between computational performance and size of working memory. The results of this "upstream" study will serve as a basis for further, more detailed architecture studies.

  • 1664.
    Åhlander, Anders
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Taveniku, Mikael
    Department of Computer Engineering, Chalmers University of Technology, Sweden.
    Svensson, Bertil
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS). Department of Computer Engineering, Chalmers University of Technology, Sweden.
    A multiple SIMD approach to radar signal processing1996Inngår i: 1996 IEEE TENCON: Digital signal processing applications : proceedings : The University of Western Australia, Perth, Western Australia, 26-29 November 1996, Vol. 2 / [ed] Roberto Togneri, Piscataway, NJ: IEEE Press, 1996, s. 852-857Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Next generation radar systems, with phase-controlled array antennas, will have to process data that is many times larger than in current systems. This requires an enormous computing power. Even in a relatively small airborne radar system, with hard size and power consumption constraints, a sustained computing power of 40 GOPS (or 40 GFLOPS, if floating point calculations are used) will be needed to perform only the subset of the calculations known as the space-time adaptive processing, STAP Consequently, there is a need for new parallel computing modules, as well as new overall system architectures and application development environments. In this paper, a modular architecture with highly parallel SIMD-modules is presented as a promising solution, capable of handling STAP. A version of the architecture, equipped with bit-serial floating point PEs, is described and evaluated. Implementation technology aspects are discussed.

  • 1665.
    Åhlander, Anders
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Åström, Anders
    Airborne Radar Division, Ericsson Microwave Systems AB, Mölndal, Sweden.
    Svensson, Bertil
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    Taveniku, Mikael
    XCube Communication, Westford, MA, USA.
    Meeting Engineer Efficiency Requirements in Highly Parallel Signal Processing by Using Platforms2005Inngår i: Proceedings of the 17th IASTED International Conference on Parallel and Distributed Computing and Systems: November 14-16, 2005, Phoenix, AZ, USA / [ed] S. Q. Zheng, Anaheim: ACTA Press, 2005, s. 693-700Konferansepaper (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    One of the driving forces behind the development of new, highly parallel architectures is the need for embedded high-performance computing. The development of advanced applications on such architectures is, however, potentially connected to high costs. Cost-effective devel opment requires tools and processes that provide engineer efficiency, in this case tools and processes that help the developer master the application complexity. Related to engineer efficiency are the important concepts of system sustainability and flexibility. To address these issues, a platform approach can be taken. The platform should offer an understandable and stable development model, and at the same time give the possibility to take advantage of the rapid technology development, including the use of new parallel architectures. Thus it must support multiple hard ware targets, and the development model should decouple application development from mapping aspects. Two radar signal processing examples, one compute-intensive STAP and one data-intensive SAR, are used to illustrate the need. The GEPARD platform is presented as an example of our approach, and we argue that the described platform is a good fit for advanced signal processing development, facilitating the desired engineer efficiency, sustainability, and flexibility.

  • 1666.
    Åkesson, Maria
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Digital Innovation in the Value Networks of Newspapers2009Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    After decades of digital developments, we are now entering a truly digital era. Digital information and communication technology has become a naturally embedded part ofthe designed environment we live in. Most parts of life are today pervaded by digital products and services. Evidence of such immersion can be noted in, for instance, media consumption. This development is gradually shaping and cultivating a media environment that is ubiquitous. Such ubiquity is manifested in media’s constant presence and thechanges in media consumption in the purview of digital innovation. Indeed, digital innovation is not only a shift in technology. It alters existing value networks and calls forrethinking existing value perceptions. While this disruptive change driven by digitizationcan be found in many industries, this thesis focuses on its impact on value networks in thenewspaper industry.The digitization of newspapers started with the introduction of the internet in the 90´sand soon emerged into new media innovations. While these new media innovations have not replaced existing media, they have been disruptive to newspaper value networks. Recently, the emergence of yet another digital innovation is specifically interesting whenstudying changes to value networks of the newspaper industry: the e-paper. This innovation (a screen technology very close to print on paper) exhibits inherent valuesthat make future replacement of print on paper a possibility. It is therefore regarded as avery promising technology in the newspaper industry. This thesis can be positioned at the intersection of the friction between forces to embarkon a new media trajectory and forces to hang on to the established structures andcontrol. The research question addressed in this thesis is: How are value networks of newspapers influenced by digital innovation? Addressing the research question, a multimethod approach was adopted to gain a broad understanding of how digital innovationinfluences value networks of newspapers. Drawing on digital innovation literature, the thesis presents a theoretical perspective with which to understand how digital innovation influences value networks. This perspective is instantiated as a model of value network configuration. The model emphasizes the multi-layered, dynamic, dialectic, and diametrical character of value networks in digital innovation. The model is offered as abasis and analytical tool to further explore value networks in digital innovation. This tool is useful for newspaper stakeholders when entering the digital era.

  • 1667.
    Åkesson, Maria
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Mobile service value: presenting the newspaper publisher view on how to attract users and advertisers2006Inngår i: Proceedings of the 29th IRIS, 2006, s. 19-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents results from a study of news publisher’s perceptions of reader and advertiser value of mobile services. Literature on mobile service features and benefits has been used to discuss these values. The study was conducted in 10 European newspaper publishing organizations. The data on the value perceptions was analyzed iteratively to discover patterns of attributes, and resulted in a set of values for readers respectively advertisers. These finding suggest a re-shaped service model for newspaper publishers. The perception of reader values are availability, experience, relevance, sociability, and credibility, and of advertiser value mass coverage, targeting, tracking and mediating. This set of value attributes can be of guidance for content-providing organizations attempting to practice a value-centered approach to mobile service design.

  • 1668.
    Åkesson, Maria
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Value proposition in m-commerce: exploring service provider and user perceptions2007Inngår i: Proceedings of 6th Annual Global Mobility Roundtable, 2007, s. 19-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Adoption of mobile services and m-business outcomes has not yet reached expectations. The uncertainties in m-commerce are still many occasioning a need to explore challenges and opportunities. This study provides empirical data on perceptions of value proposition in m-commerce from the supplier as well as the demand side. The first is addressed in an interview study with newspaper publishers that offer mobile services, and the second in a broad survey of 1388 mobile service users. The findings show that there are similarities as well as differences in perceptions of value held by service providers and users of mobile services. Ubiquity and service provider/user relationship were identified as general service characteristics whereas localization, personalization, convenience and socialization were identified to be mobile service value dimensions. The aim is to provide useful insights for service providers to better meet the market demands in consumer m-commerce.

  • 1669.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Ihlström, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Mobile service value – presenting the newspaper publisher view on how to attract readers and advertizers2006Inngår i: Proceedings, TAGA 2006, 58th Annual Technical Conference, Vancouver, Canada, 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    As most of today’s media houses publish in multiple channels, they also exist in a multitude of infrastructures. Given the ongoing diffusion of personal computers, handheld devices, and mobile telephones as well as the advent of new technologies such as the e-paper, a new type of ubiquitous information environment is emerging. In this paper we give an update on the development of e-paper technology and provide a literature review of infrastructure issues in ubiquitous information environments. From empirical results from 19 interviews and 9 workshops with newspaper managers and designers in Sweden, Belgium, France and the Netherlands, we address the following research question: What infrastructure considerations arise with the introduction of a new channel in a ubiquitous media environment?

  • 1670.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Towards a Ubiquitous Media Environment: Adding the e-newspaper Channel2006Inngår i: Proceedings of the Technical Association of the Graphic Arts, TAGA, Sewickley, USA: Technical Association of the Graphic Arts , 2006, s. 1-23Konferansepaper (Fagfellevurdert)
    Abstract [en]

    As most of today’s media houses publish in multiple channels, theyalso exist in a multitude of infrastructures. Given the ongoing diffusion ofpersonal computers, handheld devices, and mobile telephones as well as theadvent of new technologies such as the e-paper, a new type of ubiquitousinformation environment is emerging. In this paper we give an update on thedevelopment of e-paper technology and provide a literature review ofinfrastructure issues in ubiquitous information environments. From empiricalresults from 19 interviews and 9 workshops with newspaper managers anddesigners in Sweden, Belgium, France and the Netherlands, we address thefollowing research question: What infrastructure considerations arise with theintroduction of a new channel in a ubiquitous media environment?

  • 1671.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Advertising Challenges in Ubiquitous Media Environments2010Inngår i: Handbook of Research on Mobile Marketing Management / [ed] Key Pousttchi, Dietmar G Wiedemann, Hershey, PA: Business Science Reference , 2010, s. 77-93Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    Mobile advertising opportunities have attracted interest from industry and academics as a response to the trend of diffusion of new mobile technology. One industry particularly interested in new advertising opportunities is the newspaper industry. Many media houses envision a future multi-channel media environment supporting device independent, anytime, anywhere publishing, i.e. a Ubiquitous Media Environment (UME). In this paper we explore how ubiquitous advertising challenges the role of media houses. Ubiquitous advertising refers to advertising in a UME, anytime, anywhere and in any device. Based on results from interviews and workshops with advertisers and publishers we discuss how media houses traditional role is challenged. We contribute with an understanding of how media houses can develop their role to succeed with ubiquitous advertising and to m-advertising literature with insights into the dynamics of balancing consumer and advertiser value of ubiquitous advertising.

  • 1672.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Designing and evaluating the calm electronic newspaper2006Inngår i: Proceedings of the 14th European Conference on Information Systems, ECIS 2006 / [ed] Jan Ljungberg, Göteborg: IT-universitetet, Göteborgs universitet , 2006, s. 12-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper reports from an ongoing action research study concerning the design of the future e-newspaper, i.e. a newspaper on e-paper technology. The e-paper innovation is of great importance to the newspaper publishers since it has the potential of eventually replacing the printed newspaper due to its readability and high contrast. This study addresses the challenge of how to design calm user experience of the e-newspaper. The action research approach followed the canonical action research method, in collaboration with publisher, reader and advertiser clients. The activities include a range of data collection techniques such as project meetings, workshops, interviews and prototype testing. In the diagnosing phase we identified the core challenges for designing the e-newspaper which directed us to the literature of calm technology. Three design principles for calm user experience were formulated in the action planning phase, followed by designing three e-newspaper prototypes, which embeds the design principles, in the action taking phase. The prototypes were evaluated with 36 readers in the evaluating phase and the outcome of these evaluations was later assessed in collaboration with newspaper designers for specifying learning. The results indicate that the design principles support calm user experience.

  • 1673.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    From Multi Channel Publishing towards a Ubiquitous Media Environment2008Inngår i: Journal of Graphic Technology, ISSN 1544-9599, E-ISSN 1544-9602, Vol. 4, nr 3, s. 126-148Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    As most of today’s media houses publish in multiple channels, they also exist in a multitude of infrastructures. Given the ongoing diffusion of personal computers, handheld devices, and mobile telephones as well as the advent of new technologies such as the epaper, a new type of ubiquitous media environment is emerging. Drawing on this background we address the research question what are the challenges when aligning a new promising technology (such as the e-paper) with existing value networks enabling value creation in ubiquitous media environments? In this paper we report from a study with newspaper publishers in Sweden, Belgium, France and the Netherlands consisting of 18 interviews and 9 workshops. The findings show that value networks in a multiple channel publishing environment are closely related to infrastructure environment. The nature of ubiquitous media environment will have implications on value networks openness and flexibility. Value networks will need a fluid structure to cope with changes in very short cycles.

  • 1674.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Mobile Service Adoption: the Swedish Case Between 2006 and 20082008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper describes the development of mobile service adoption between 2006 and 2008 using the Global Acceptance of Technology model (GAT) for categorization. Two online surveys were conducted, one in 2006 and one in 2008. The online questionnaires were presented at the web sites at two Swedish newspapers with comparable circulation. The sample from 2006 includes 131 respondents and the 2008 sample include 152 respondents. The samples have comparable distribution of gender, age and mobile phone penetration. The findings show a positive development in mobile service adoption in Sweden from 2006 to 2008, e.g. a large portion of the users have upgraded their mobile phones to 3G, the cost is nolonger an important barrier for adoption and users seem to be more acquainted with using mobile services and therefore do not regard mobile services to be as complicated. However, the value of mobile services was generally rated lower in 2008 than in 2006, suggesting a new challenge for the mobile service producers.

  • 1675.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    The vision of ubiquitous media services: How close are we?2007Inngår i: Human interface and the management of information: Symposium on Human Interface 2007, held as part of HCI International 2007, Beijing, China, July 22 - 27, 2007 : proceedings. P. 2, Interacting in information environments / [ed] Michael J. Smith, Gavriel Salvendy, Berlin / Heidelberg: Springer Berlin/Heidelberg, 2007, s. 222-232Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The high penetration of mobile devices implies that we are closing up to the vision of ubiquitous media environments. This paper reports from a broad survey about barriers, use patterns, and motivations for using mobile media services. The aim is to contribute to the understanding of mobile service adoption process by studying users in different phases of the adoption process. The findings imply that mobile services are still not adopted and ubiquitously ingrained in use patterns. There is still a long way to go.

  • 1676.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Kautz, Karl-Heinz
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Engaged Design Science: Developing Design Visions for the future e-Newspaper2010Inngår i: ICIS 2010 Proceedings - Thirty First International Conference on Information Systems, Atlanta: Association for Information Systems, 2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper reports the development of design visions for the future electronic (e-) newspaper. The ambition is to bring together the features of printed newspapers with the possibilities of online media. In an engaged design science research project we together with representatives of the newspaper industry and newspaper readers identified the three design challenges genre awareness, stress and lack of control, and obstruction. We also developed the guiding design metaphor of a calm e-reading experience and three design principles provision of media recognition support, support for user control, and support for focus on content. The design principles were evaluated through e-newspaper prototypes and on this basis we revised the design principles which led to a design theory for e-reading solutions on and for digital media.

  • 1677.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Sörensen, Carsten
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ihlström Eriksson, Carina
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Ambidexterity under digitalization: A tale of two decades of new media at a Swedish newspaper2018Inngår i: Scandinavian Journal of Management, ISSN 0956-5221, E-ISSN 1873-3387, Vol. 34, nr 3, s. 276-288Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The digitalization of the newspaper industry represents a significant challenge for incumbent companies to engage new technologies. Many companies in the industry have had to seek new markets through digital technologies to survive. This paper explores how one of the largest Swedish newspapers, Aftonbladet, has strategically embraced new media and new markets. We report a decade of engaged scholarship based on interviews and archival analysis that covers 20 years of strategic acts at the company. We consider this effort as a case of organizational ambidexterity under digitalization. The analysis seeks to extend theoretical understanding of the interrelationships between strategic intent and technological choice. The paper contributes to the understanding of ambidexterity under digitalization by theoretically framing it in terms of strategic acts. The research suggests that digitalization implies a more complex ambidexterity interrelationship between old and new markets and technologies. As digitalization enables the loosening of previously tight couplings, the clear theoretical distinction between old and new, and critically, the unproblematic transition, is brought into question. The paper suggests replacing the notion of an orderly shift from the old to the new with ambidexterity under digitalization as a duality of both old and new undergoing continual reconfiguration. © 2018 Elsevier Ltd

  • 1678.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Thomsen, Michel
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    A blended model for student-centered supervision of thesis work in higher education2016Inngår i: ICERI2016 Proceedings, Valencia: IATED , 2016, s. 906-914Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Thesis work is challenging to both students and supervisors. The traditional model of supervision is that one supervisor individually supervises thesis work. In higher education this model has been challenged with new approaches such as blended group supervision to make the process more interactive and to provide support for students to complete the thesis work on time. In this paper we report from an effort to design a model for blended group supervision with the aim to provide structure and support for students as well as supervisors. The model is discussed in relation to the theoretical concepts zone of proximal development and scaffolding. 

  • 1679.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Thomsen, Michel
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Challenges to Newspapers in Digital Platform Ecosystems2015Inngår i: MCIS 2015 Proceedings, Mediterranean Conference on Information Systems (MCIS) , 2015, s. Paper 14-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Incumbent content providers such as newspapers experience radical changes in their business environment. Digital platforms are becoming increasingly important to innovate digital media services and business. The generativity of digital platforms afforded by digital technology offers new opportunities, but also new challenges. Digital platforms exist in an ecosystem of complex networks of actorsand resources. In this paper we shed light on the challenges for incumbent content providers to adapt to and realize business opportunities in digital platforms. We do this from the viewpoints of newspaper management, platform provider and analysts of media business.

  • 1680.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Thomsen, Michel
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Designing an educational curriculum for the digital future: an international master in "Digital Service Innovation”2018Inngår i: EDULEARN18 Proceedings / [ed] L. Gómez Chova, A. López Martínez & I. Candel Torres, IATED , 2018, s. 6317-6323Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents the design of an international master’s curriculum in Digital Service Innovation. Digitalization and the rapid development in information technology (IT) are fundamentally reshaping society. This development brings with it an increasing need for mastery of digital service innovation. The international master's program Digital Service Innovation addresses this need by studying digitalization, digital resources for value creation, and educating students in how to design innovative digital services. Digital Service Innovation is a two-year master’s program focused on sustainable value creation. Year one focuses on the concept of innovation and design driven problems solving. Year two focuses on conceptualization, design of digital services. The final degree project gives students the opportunity to apply theoretical knowledge in a design study, interacting with companies and public authorities. This is expected to improve the students' ability to understand how digital service innovation is connected to business requirements, and identify new digital services or applications. All to prepare students for working professionally in the field of digital service innovation.

  • 1681.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Thomsen, Michel
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Digital Innovation and Social Dilemmas2014Inngår i: Creating Values For All Through IT: IFIP WG 8.6 International Conference on Transfer and Diffusion of IT, TDIT 2014, Aalborg, Denmark, June 2-4, 2014. Proceedings / [ed] Bergvall-Kåreborn, Birgitta & Nielsen, Peter Axel, Heidelberg; New York; Dordrecht; London: Springer Berlin/Heidelberg, 2014, s. 49-61Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Digital innovation is rapidly reshaping society, affecting fundamental aspects of our everyday activities and lives. This development is accompanied with benefits as well as social dilemmas. In this paper we approach this class of challenges in IS digital innovation research. We investigate how social challenges are attended in research agendas, and reflect upon social challenges emerging from a digital service innovation project. Based on the empirical case, we present a scenario that illustrates how social challenges can unfold in digital service innovation. The case exemplifies three conflicts of interest that are used to discuss implications for the research agendas for digital innovation. We propose that explicit attention is paid to social and ethical challenges, taking a large scale and interdisciplinary approach on social and ethical challenges in digital ecosystems.

  • 1682.
    Åkesson, Maria
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Thomsen, Michel
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Människa och Informationsteknologi (MI-lab).
    Work-Integrated Learning: Visualizing Research as Professional Practice2018Inngår i: ICERI2018 Proceedings, The International Academy of Technology, Education and Development, 2018, s. 9608-9612Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In higher education work place practice through work placement or internships can be integrated as part of the education, especially when educating for professions such as teachers, medical professionals or law practitioners. The overall purpose of integrating work placement in the higher education is for students to experience and learn through engaging in practice with those already educated and experienced within the respective work domain. However, on masters level in higher education we seldom allow students the same opportunity related to the researcher profession. Students are commonly invited to do project or thesis work in research projects or relating to research work. Less common is to actually invite students to participate in research professional practice as a work placement. With work placement we here refer to the student being engaged during a period of time, in full working days, together with research professionals in their everyday practice. Learning to become a researcher through work experience has been described in a case study of a Ph.D. student by e.g. Eames (2003). The study showed that work placement can provide significant learning opportunities. The learning through research everyday work was different form being educated about research, and provided a view of what it means to practice in a research profession. We propose that the same opportunity for learning can be provided in masters education.

    In this paper we report from an initiative of integrating research work practice in an informatics master program. At Halmstad University we are starting a new international master program in Digital Service Innovation (starting September 2018). The master program educates students to design sustainable digital services through design research. With the aim to inspire students for future careers as researchers we offer the students the opportunity for 8 full weeks of “Research Placement” to visualize research as professional practice. The purpose is to provide hands-on experience of research to develop their awareness, skills and abilities to practice as design researchers. It also provides the opportunity to engage with research professionals and the stakeholders involved in the research. Moreover, the students are provided the opportunity to discuss their own career paths and the social and ethical implications of their work for society. The “Research Placement” can be in an academic institution, a research institute or a research and development department in an organization. The student examination assignment is a self-study and reflection of their “Research Placement” (see e.g. LaBoskey, 2004; Schön, 1983).

    References:

    1. Eames, C. (2003). Learning to Work: Becoming a Research Scientist Through Work Experience Placements. Education, 4(2), 7-15.
    2. LaBoskey, V. K (2004). The Methodology of Self-Study and Its Theoretical Underpinnings. In International Handbook of Self-Study of Teaching and Teacher Education Practices, Eds Loughran, J. J., Hamilton, M. L., LaBoskey, V. K. and Russell, T., Springer.
    3. Schön, D. A. (1983). The reflective practitioner: how professionals think in action. Basic Books.
  • 1683.
    Åstrand, Björn
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Vision Based Perception for Mechatronic Weed Control2005Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The use of computer-based signal processing and sensor technology to guide and control different types of agricultural field implements increases the performance of traditional implements and even makes it possible to create new ones. This thesis increases the knowledge on vision-based perception for mechatronic weed control. The contributions are of four different kinds:

    First, a vision-based system for row guidance of agricultural field machinery has been proposed. The system uses a novel method, based on the Hough transform, for row recognition of crop rows.

    Second is a proposal for a vision-based perception system to discriminate between crops and weeds, using images from real situations in the field. Most crops are cultivated in rows and sown in a defined pattern, i.e. with a constant inter-plant distance. The proposed method introduces the concept of using these geometrical properties of the scene (context) for single plant recognition and localization. A mathematical model of a crop row has been derived that models the probability for the positions of consecutive crops in a row. Based on this mathematical model two novel methods for context-based classification between crops and weeds have been developed. Furthermore, a novel method that combines geometrical features of the scene (context) and individual plant features has been proposed. The method has been evaluated in two datasets of images of sugar beet rows. The classification rate was 92 % and 98 %, respectively.

    The third contribution is the design of a mobile agricultural robot equipped with these perception systems and a mechanical weeding tool intended for intra-row weed control in ecologically cultivated crops.

    The fourth contribution is a demonstration of the feasibility of the perception systems in real field environments, especially with respect to robustness and real-time performance. The row guidance system has been implemented in three different row cultivators and performed inter-row weed control at two commercial farms. The robot has proven to be able to follow a row structure by itself, while performing weed control within the seed line of a crop row, i.e. intra-row cultivation. 

  • 1684.
    Åstrand, Björn
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Baerveldt, Albert-Jan
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    A mobile robot for mechanical weed control2003Inngår i: International Sugar Journal, ISSN 0020-8841, Vol. 105, nr 1250, s. 89-95Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper presents an autonomous agricultural mobile robot for mechanical weed control in outdoor environments. The robot employs two vision systems: one grey-level vision system that is able to recognise the row structure formed by the crops and to guide the robot along the rows and a second, colour-based vision system that is able to identify a single crop among weed plants. This vision system controls a weeding-tool that removes the weed within the row of crops. It has been shown that colour vision is feasible for single plant identification, i.e. discriminating between crops and weeds. The system as a whole has been verified, showing that the subsystems are able to work together effectively. A first trial in a greenhouse showed that the robot is able to manage weed control within a row of sugar beet plants.

  • 1685.
    Åstrand, Björn
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Baerveldt, Albert-Jan
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    A vision based row-following system for agricultural field machinery2005Inngår i: Mechatronics (Oxford), ISSN 0957-4158, E-ISSN 1873-4006, Vol. 15, nr 2, s. 251-269Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the future, mobile robots will most probably navigate through the fields autonomously to perform different kind of agricultural operations. As most crops are cultivated in rows, an important step towards this long-term goal is the development of a row-recognition system, which will allow a robot to accurately follow a row of plants. In this paper we describe a new method for robust recognition of plant rows based on the Hough transform. Our method adapts to the size of plants, is able to fuse information coming from two rows or more and is very robust against the presence of many weeds. The accuracy of the position estimation relative to the row proved to be good with a standard deviation between 0.6 and 1.2 cm depending on the plant size. The system has been tested on both an inter-row cultivator and a mobile robot. Extensive field tests have showed that the system is sufficiently accurate and fast to control the cultivator and the mobile robot in a closed-loop fashion with a standard deviation of the position of 2.7 and 2.3 cm, respectively. The vision system is also able to detect exceptional situations by itself, for example the occurrence of the end of a row.

  • 1686.
    Åstrand, Björn
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Baerveldt, Albert-Jan
    Högskolan i Halmstad.
    An agricultural mobile robot with vision-based perception for mechanical weed control2002Inngår i: Autonomous Robots, ISSN 0929-5593, E-ISSN 1573-7527, Vol. 13, nr 1, s. 21-35Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper presents an autonomous agricultural mobile robot for mechanical weed control in outdoor environments. The robot employs two vision systems: one gray-level vision system that is able to recognize the row structure formed by the crops and to guide the robot along the rows and a second, color-based vision system that is able to identify a single crop among weed plants. This vision system controls a weeding-tool that removes the weed within the row of crops. The row-recognition system is based on a novel algorithm and has been tested extensively in outdoor field tests and proven to be able to guide the robot with an accuracy of 2 cm. It has been shown that color vision is feasible for single plant identification, i.e., discriminating between crops and weeds. The system as a whole has been verified, showing that the subsystems are able to work together effectively. A first trial in a greenhouse showed that the robot is able to manage weed control within a row of crops.

  • 1687.
    Åstrand, Björn
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Bouguerra, Abdelbaki
    Learning Systems Lab (AASS), Dept. of Technology, Örebro University, Sweden.
    Andreasson, Henrik
    Learning Systems Lab (AASS), Dept. of Technology, Örebro University, Sweden.
    Lilienthal, Achim J.
    Learning Systems Lab (AASS), Dept. of Technology, Örebro University, Sweden.
    Rögnvaldsson, Thorsteinn
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    An autonomous robotic system for load transportation2009Inngår i: Program and Abstracts, Fourth Swedish Workshop on Autonomous Robotics, SWAR'09 / [ed] Lars Asplund, Västerås: Mälardalen University , 2009, s. 56-57Konferansepaper (Annet vitenskapelig)
  • 1688.
    Åstrand, Björn
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Johansson, Maria
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Segmentation of partially occluded plant leaves2006Inngår i: IWSSIP 200613th International Conference on Systems, Signals and Image ProcessingSeptember 21-23, 2006, Budapest, Hungary / [ed] Balázs Enyedi, András Reichardt, Stockholm: Harlequin , 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    N/A

31323334 1651 - 1688 of 1688
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