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  • 5001. Wilson, Max L.
    et al.
    Russell-Rose, TonyLarsen, BirgerHansen, PrebenStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.Norling, Kristian
    Proceedings of the 3rd European Workshop on Human-Computer Interaction and Information Retrieval2013Conference proceedings (editor) (Refereed)
    Abstract [en]

    EuroHCIR 2013 was organised with the specific goal of better engaging the IR community, who have been underrepresented at previous EuroHCIR conferences. Thus we proposed to have the workshop at the ACM SIGIR conference in Dublin. Research, Industry, and Position papers were invited, and although very few industry submissions were received, we received a number of research and position papers focusing on the intersection of IR and HCI evaluations, several focusing on adapting the TREC paradigm. Many interesting system and demonstrator papers were also accepted.

  • 5002. Wilson, Max L.
    et al.
    Russell-Rose, TonyLarsen, BirgerHansen, PrebenStockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.Norling, Kristian
    Proceedings of the 3rd European Workshop on Human-Computer Interaction and Information Retrieval: A workshop at ACM SIGIR 20132013Conference proceedings (editor) (Refereed)
  • 5003.
    Wimelius, Henrik
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Duplicate systems: investigating unintended consequences of information technology in organizations2011Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The organizational consequences of information technology (IT) constitutes a core focus in information systems (IS) research. The relationship between organizations and IT has received considerable attention by IS researchers in order to develop knowledge related to how and why organizations and IT are related. While organizational use of IT continues to increase in practice, previous research has shown that the effects of IT at best are difficult to predict. Consequently, the adoption and assimilation of IT in organizational settings must be recognized as complex and challenging processes, which makes the production of knowledge related to such processes important and pressing.

     

    This dissertation identifies, characterizes and explains a paradoxical outcome of the adoption and assimilation of an enterprise content management (ECM) system in a context of organizational information management. The outcome, labeled the duplicate systems paradox, is constituted by a situation in which an organization continuously allows multiple, overlapping, partially competing and largely incompatible information systems to persist and continue to evolve over time, despite continued awareness of the adverse consequences on organizational information management capabilities. A qualitative case study approach was used as the primary means for data collection. The case study was conducted in the administrative divisions of HealthOrg, a large organization in the medical- and health care sector. To this end, the main objective of this dissertation is to investigate how this paradox was formed, and furthermore, how and why it was able to persist. In order to do this, dialectical theory is combined with contextualism and theory on organizational information processing to form a comprehensive theoretical perspective used to inform the analytical efforts.

     

    By using a dialectical approach, the analysis presents empirical evidence of the existence and composition of three overarching contradictions found to affect the formation and persistence of the duplicate systems paradox. More specifically, the resulting explanatory model demonstrates how three pairs of opposites, control versus support at the requirements level, options versus practices at the solutions level, and top-down versus bottom-up approaches at the transformations level, along with contextual tensions, were essential components in the formation and persistence of the paradox. Thus, the duplicate systems paradox could form and continue to evolve due to contradictory forces present at, and interconnected between, different vertical and horizontal levels within the organization. Through the identification and explanation of the duplicate systems paradox, this study provides a detailed example of how, and why, unintended consequences of IT in organizations may emerge and continue over time.

     

    In terms of implications for research and practice, the findings of this dissertation point to six important observations. First, this research suggests that understanding and characterizing the context in which IT is to be implemented is crucial and challenging. Thus, organizations should pay careful attention to the practical side of context, rather than to the somewhat theoretical boundaries of organizations. It is suggested that the concepts of ‘inner’ and ‘outer’ context may be useful in analyzing and understanding context. Second, this research suggests that organizations should attempt to identify potentially conflicting requirements, and devise clear strategies to decide how to prioritize between such requirements as the identification and explication of requirements present at different levels in the organization may reveal problems that need to be considered when choosing information system (IS). Third, organizations need to pay careful attention to what the adoption of a new IS means in terms of adaptation and/or realignment, and to what extent organizational activities, technological functionalities, or both, should be adapted. Organizations should furthermore be aware that the adoption of systems that can also be used as development platforms may cause a cascade of effects and dependencies that are difficult to manage. Fourth, the findings of this research suggest that organizations faced with the challenge of adopting complex IT solutions need to take into account their previous strategies and planned new ones in order to devise a comprehensive strategic approach since the coexistence of radically different strategies may cause uncertainty and inertia within the overall assimilation process. Fifth, this research indicates that IT management and information management (IM) are highly interrelated activities, but are not mutually exclusive. Thus, organizations adopting technologies that are specifically focused on information management may benefit from developing distinct areas of responsibility and clear communication channels between the involved organizational units. Furthermore, these findings suggest that future research should pay careful attention to, and specifically investigate, the exact nature of the relationship between information management and IT management. Finally, this research demonstrates how a dialectical approach may be used to adequately investigate organizational information management, specifically in relation to the adoption and assimilation of IT.

  • 5004.
    Wimelius, Henrik
    Umeå University, Faculty of Social Sciences, Department of Informatics.
    Fundamentals of user perception and interaction: environmental psychology applied in a study of web pages2004In: PsychNology Journal, ISSN 1720-7525, E-ISSN 1720-7525, Vol. 2, no 3, p. 282-303Article in journal (Refereed)
    Abstract [en]

    This paper explores the possibility of using theories and concepts from the field of environmental psychology as a framework for understanding perception of- and interaction with web pages. A qualitative pilot experiment has been conducted in order to investigate potential similarities in how people interact with, and perceive web pages and real world environments. This study indicates that perception of web pages is very similar to perception of natural environments. Many key factors that have proven to be important in perception of natural environments, such as complexity, spatial configuration and mystery, also appear to be relevant determinants in perception of web pages. Further, it also seems likely that interaction with web pages, to some extent can be described using a model based upon a conceptual framework depicting habitats selection.

     

  • 5005. Wimmer, M. A.
    et al.
    Scholl, J.
    Grönlund, Åke
    Örebro University, Swedish Business School at Örebro University.
    What are the future possibilities of eDemocracy?: A discussion paper2007In: Electronic Government, Proceedings, 2007, Vol. 4656, p. 401-411Conference paper (Other academic)
    Abstract [en]

    This paper presents some future possibilities for eDemocracy tools and considers how these new technologies might conflict with our basic assumptions about what democracy should be. I hope this paper will contribute to discussion of under what situations different forms of eDemocracy are appropriate. The possibilities and repercussions of user profiling, voting outside of polling booths, longer decision-making periods, changeable election results and weighted voted are considered. Although none are necessarily advisable, this paper suggests they might be interesting to consider.

  • 5006. Wimmer, Maria
    et al.
    Scholl, Hans J.Grönlund, ÅkeÖrebro University, Department of Business, Economics, Statistics and Informatics.Viborg Andersen, Kim
    Electronic Government: 5th international conference, EGOV 2006, Kraków, Poland, September 4-8 : Proceedings2006Conference proceedings (editor) (Other academic)
  • 5007. Wimmer, Maria
    et al.
    Traunmüller, RolandGrönlund, ÅkeÖrebro University, Department of Business, Economics, Statistics and Informatics.Viborg Andersen, Kim
    Electronic government: 4th international conference, EGOV 2005, Copenhagen, Denmark, August 22-26 : Proceedings2005Conference proceedings (editor) (Other academic)
  • 5008.
    Winge, Monica
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Drougge, Ulrika
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Juell-Skielse, Gustaf
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Implications of Single Point of Contact: municipal case studies2014In: DSV Writers Hut: proceedings, August 21-22, Åkersberga, Sweden / [ed] Gustaf Juell-Skielse, Stockholm: Department of Computer and Systems Sciences, Stockholm University , 2014Conference paper (Other academic)
    Abstract [en]

    As more public organizations aim to move to the stage of transformational Government, the need for ‘single point of contact” increases dramatically on local, regional and national government levels. This paper contributes to literature by reporting the findings from three case studies of Swedish local government who has reached, or intend to reach, the transformational stage of e-Government. Using a grounded theory approach, information about the municipalities was collected and analyzed from the perspective of goals, implications and change management. The paper reports on the opportunities aimed for and experienced by the municipalities as well as the organization-al, technical and legal challenges faced by them. Finally we make five prop-ositions, based on the learning from the case studies, on how to manage changes related to implementing single point of contact in local government.

  • 5009.
    Winge, Monica
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Johannesson, Paul
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Perjons, Erik
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Wangler, Benkt
    Managing the Process Conglomeration in Health and Social Care2013In: HEALTHINF 2013 - Proceedings of the International Conference on Health Informatics / [ed] Deborah Stacey, Jordi Solé-Casals, Ana L. N. Fred, Hugo Gamboa, SciTePress, 2013, p. 374-381Conference paper (Refereed)
    Abstract [en]

    The organisation and processes of today’s health and social care are becoming ever more complex as a consequence of societal trends, including an ageing population and an increased reliance on care at home. One aspect of the increased complexity is that a single patient may receive care from several separate care providers, which easily results in situations with potentially incoherent, uncoordinated and interfering care processes. In order to describe and analyse such situations, the paper introduces the notion of a process conglomeration. This is defined as a set of patient care processes that all influence the same patient, which are overlapping in time, and that all have the goal of improving or maintaining the health and social wellbeing of the patient. Problems and challenges of process conglomerations are investigated using coordination theory and speech act theory. In order to address the challenges, a number of information services are proposed.

  • 5010.
    Winge, Monica
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Johannesson, Paul
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Perjons, Erik
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Wangler, Benkt
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    The coordination hub: Toward patient-centered and collaborative care processes2015In: Health Informatics Journal, ISSN 1460-4582, E-ISSN 1741-2811, Vol. 21, no 4, p. 284-305Article in journal (Refereed)
    Abstract [en]

    The organization and processes of today's health and social care are becoming ever more complex as a consequence of societal trends, including an aging population and an increased reliance on care at home. One aspect of the increased complexity is that a single patient may receive care from several care providers, which easily results in situations with potentially incoherent, uncoordinated, and interfering care processes. In order to describe and analyze such situations, the article introduces the notion of a process conglomeration. This is defined as a set of patient-care processes that all concern the same patient, that are overlapping in time, and that all are sharing the overall goal of improving or maintaining the health and social well-being of the patient. Problems and challenges of process conglomerations are investigated using coordination theory and models for continuous process improvement. In order to address the challenges, a solution is proposed in the form of a Coordination Hub, being an integrated software service that offers a number of information services for coordinating the activities of the processes in a process conglomeration.

  • 5011.
    Winge, Monica
    et al.
    Karolinska Institutet, Sweden.
    Johansson, Lars-Åke
    Alkit Communications, Sweden.
    Nyström, Monica
    Karolinska Institutet, Sweden.
    Lindh-Waterworth, Eva
    Umeå University, Sweden.
    Wangler, Benkt
    University of Skövde, Sweden.
    Need for a New Care Model - Getting to Grips with Collaborative Home Care2010In: MEDINFO 2010: Proceedings of the 13th World Congress on Medical Informatics / [ed] C. Safran et al., IOS Press, 2010, p. 8-12Conference paper (Refereed)
    Abstract [en]

    In this paper we discuss the fact that more and more patients are treated in their homes by a set of organizations, sometimes with different ownership, and how this fact places new and severe demands on health care and home service staff to communicate and collaborate. We point to the need for managers in different organizations to agree on ways of communicating and collaborating on the operational level and how this aspect needs to be considered during procurement of home care services. Most importantly, by reasoning around a set of problematic areas, we derive a set of related problems and suggest solutions for dealing with them. The solutions are a mix of organizational/administrative measures and IT support for communication and coordination.

  • 5012.
    Winge, Monica
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Lindh-Waterworth, Eva
    Scenario for a patient at home in health and social care2014In: Journal of Healthcare Leadership, ISSN 1179-3201, E-ISSN 1179-3201, no 6, p. 51-66Article in journal (Refereed)
    Abstract [en]

    This paper describes and discusses the situation for a typical patient with multiple illnesses and how his case would benefit from improved coordination, communication, and collaboration among all involved care providers. The paper is built around a patient case presented in a current scenario. The authors identified that for a single patient with several problems and diagnoses and the involvement of several care actors, the common issues concern lack of collaboration, lack of coordination, and awareness of what others have done to assess, plan, perform, and evaluate care. This presumably leads to a lack of care quality and a lack of effective use of care resources. The scenario and the findings are based on a patient-oriented perspective, on an analysis expressed in focus groups, and on interviews with key actors in health and social care. The paper also discusses the fact that an increasing number of patients are treated in their homes by a variety of organizations, and how this fact raises new and more intense demands on the various stakeholders forming the care staff to collaborate and coordinate care. We point to the need for managers in and between organizations to agree on the ways of collaborating at the operational level. Most importantly, by taking a basic set of issues as the starting point for reasoning, we derived a set of related problems and suggest solutions to deal with these. The literature currently lacks scenario descriptions that put the patient's situation into focus with respect to collaboration between health and social care. Finally, the paper presents a future case for collaboration including support by new e-services.

  • 5013.
    Winge, Monica
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Perjons, Erik
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Wangler, Benkt
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Understanding Care Work and the Coordination of Care Process Conglomerations2015In: Advances in Conceptual Modeling: ER 2015 Workshops AHA, CMS, EMoV, MoBID, MORE-BI, MReBA, QMMQ, and SCME, Stockholm, Sweden, October 19-22, 2015, Proceedings / [ed] Manfred A. Jeusfeld, Kamalakar Karlapalem, Springer, 2015, p. 26-37Conference paper (Refereed)
    Abstract [en]

    Health and social care is becoming ever more complex as a consequence of societal trends, including an aging population and increased reliance on care at home. One aspect of the increased complexity is that a single patient may receive care from several care providers, which easily results in situations with potentially incoherent, uncoordinated, and interfering care processes. In order to describe and analyze such situations, the article introduces the notions of patient-centered care process and a conglomeration of such. The latter is defined as a set of patient care processes that all concern the same patient, are overlapping in time, and are all sharing the overall goal of improving or maintaining the health and social well-being of the patient. The processes are based on a PDCA-cycle comprising phases for assessing, planning, performing and following up the care for the patient independently of health and social care organizations.

  • 5014.
    Winge, Monica
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Wangler, Benkt
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Needs, Requirements, and e-Services for Collaborative and Patient-Centered Care2013In: BIR 2012. Emerging Topics in Business Informatics Research 2012: Proceedings of the 11th International Conference on perspectives in business informatics research / [ed] Natalia Aseeva, Eduard Babkin, Oleg Kozyrev, 2013, p. 75-91Conference paper (Refereed)
    Abstract [en]

    This paper discusses the fact that more and more patients are treated in their homes by a whole set of organizations, and how this fact places new and more intense demands on health and social care staff to communicate and collaborate. The aim of the paper is to further explore the detailed needs for collaboration between different care units, individuals and professions, and to outline organizational and/or IT-based solutions. The suggested solutions are based on a patient and process oriented perspective and on an analysis of needs and issues expressed in interviews with key actors in a number of research projects focused on collaboration in care. We point to the need for managers in different organizations to agree on ways of communicating and collaborating on the operational level over sectors and units and how this aspect has to be taken into account already during procurement of care services. Most importantly, by reasoning from a basic set of issues, we derive a set of related problems and suggest solutions for how to deal with these. The solutions include suggestions for various e-services aimed at improving coordination and collaboration among care personnel.

  • 5015.
    Winge, Monica
    et al.
    Karolinska Institute, Sweden.
    Wangler, Benkt
    University of Skövde, Sweden.
    Johansson, Lars-Åke
    Alkit Communications, Sweden.
    Nyström, Monica
    Karolinska Institute, Sweden.
    Lindh-Waterworth, Eva
    Umeå University, Sweden.
    CO-CARE - Collaborative Health and Social Care2008In: Proceedings of 13th International Symposium for Health Information Management Research / [ed] P. S. Bath, K. Day, T. Norris, Massey University, New Zealand , 2008, p. 113-124Conference paper (Refereed)
    Abstract [en]

    In this paper we discuss the fact that more and more patients are treated in their homes by a set of organizations, sometimes with different ownership. We explore how this poses new and stronger demands on health care and home service staff, as well as on different managerial and operational levels, to improve their communication and collaboration. We emphasize the need for managers in different organizations to agree on ways and forms of communication and collaboration between the operational levels, and the particular importance of this during procurement of home care services. As a result a number of methodological measures, strategies and IT solutions to support organizational development, coordination and collaboration are suggested.

  • 5016.
    Wingkvist, Anna
    Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
    The Quest for Equilibrium: Towards an Understanding of Scalability and Sustainability for Mobile Learning2008Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The research presented in this thesis investigates the concept of sustainability in relation to mobile learning initiatives. Sustainability is seen as a key concept for mobile learning to gain acceptance. In linking sustainability to scalability, a term used to describe how well something can grow to suit an increasing complexity, a representation of this process is provided. In this thesis, this process is called ``the quest for equilibrium.''

    A study was conducted of an actual mobile learning initiative that involved introducing podcasts as a supplement to traditional lectures in higher education. In following this initiative, thorough data gathering was conducted, utilizing the process of iterative cycles that characterizes the action research approach. In accordance, a literature survey was conducted, whereby leading publications in mobile learning were classified and analyzed according to the following criteria: Reflections, Frameworks, Scalability, and Sustainability.

    As the mobile learning system evolved from idea to an actual empirical study, trying to understand this process became important. The insights gained during this research were used to develop a conceptual model that is based on the notion that the two concepts of Scalability and Sustainability can be linked to each other.

    This conceptual model is presented describing how a mobile learning system evolves, from Idea, to Experiment, to Project, to Release. Further, each of the stages in this evolution is described by using four areas of concern: Technology, Learning, Social, and Organization.

    Using the experience from a specific mobile learning initiative to define a conceptual model that then is used to describe the same initiative, was a way to bring together practice, theory, and research, thus provide reliable evidence for the model itself.

    The conceptual model can serve as a thinking tool for mobile learning practitioners, to help address the complexity involved when undertaking new efforts and initiatives in this field.

  • 5017.
    Wingkvist, Anna
    et al.
    Linnaeus University, Faculty of Technology, Department of Computer Science.
    Ericsson, Morgan
    University of Gothenburg / Chalmers.
    Asked and Answered: Communication Patterns of Experts on an Online Forum2013In: Proceedings IRIS36: August 11-14 2013 at Gran, Norway, 2013Conference paper (Refereed)
    Abstract [en]

    The notion of network structure for social relations dates back half a century. Nowadays people form social networks offline as well as online. At an online community people are connected trough information exchange of sorts. Interest groups form often forums to aid each other and discuss things. Programmers are no exception and a question and answer site called Stack Overflow has been up and running since 2008. Our focus is to find patterns of how people interact on this online community and see if we can find expert users. We find 4 different ways to categorize experts, which result in different rankings. We also investigate how expertise is divided among topics, and find some overlap with the global ranking. 

  • 5018.
    Winter, Jeff
    et al.
    Blekinge Institute of Technology.
    Rönkkö, Kari
    Blekinge Institute of Technology.
    SPI success factors within product usability evaluation2010In: Journal of Systems and Software, ISSN 0164-1212, E-ISSN 1873-1228, Vol. 83, no 11, p. 2059-2072Article in journal (Refereed)
    Abstract [en]

    This article presents an experience report where we compare 8 years of experience of product related usability testing and evaluation with principles for software process improvement (SPI). In theory the product and the process views are often seen to be complementary, but studies of industry have demonstrated the opposite. Therefore, more empirical studies are needed to understand and improve the present situation. We find areas of close agreement as well as areas where our work illuminates new characteristics. It has been identified that successful SPI is dependent upon being successfully combined with a business orientation. Usability and business orientation also have strong connections although this has not been extensively addressed in SPI publications. Reasons for this could be that usability focuses on product metrics whilst today's SPI mainly focuses on process metrics. Also because today's SPI is dominated by striving towards a standardized, controllable, and predictable software engineering process; whilst successful usability efforts in organisations are more about creating a creative organisational culture advocating a useful product throughout the development and product life cycle. We provide a study and discussion that supports future development when combining usability and product focus with SPI, in particular if these efforts are related to usability process improvement efforts.

  • 5019.
    Wismén, May
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Information Systems as Boundary Objects: - An Ongoing Study of Changing Knowledge Processes in Health Care2003Conference paper (Refereed)
    Abstract [en]

    The purpose of this paper is to present a framework for an ongoing empirical study. The study deals with knowledge use in a health care context and on how implementing a new computer-ised referral and answer system will change the knowledge processes. The framework is founded on theories and empirical studies from the literature and has a community of practice perspective. The information system is seen as a boundary object, which must be interpreted by different communities. The framework consists of six knowledge resources, which may be iden-tified in the organisation. But the resources are neither static nor independent and they must be studied in current use. Therefore, there is no way to analyse exactly the same knowledge re-sources before and after implementation of the system. Instead, the use of different knowledge resources must be studied

  • 5020.
    Wismén, May
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Knowledge transformation between different working group: a model for description and analysis2004Conference paper (Refereed)
    Abstract [en]

    The purpose of this paper is to present a theoretical model for description and analysis of knowledge transformation between groups. The model is constructed from two main theories, Community of Practice and Knowledge Management Episodes. This combination implies that knowledge is seen as a process and in a relational perspective. To show how the model can be used it is applied in a health care context where the daily knowledge integration between a laboratory and its customers is described. The model has been found to be suitable for the description of knowledge management processes and it highlights some possible explanations of problems that exist in the study of the organization. Furthermore, it clearly shows that there is a mutual dependency between information systems and other knowledge resources in an organization

  • 5021.
    Wismén, May
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Kunskapsprocesser inom hälso- och sjukvård - en studie av kunskapsintegrering mellan laboratorium och dess kunder2004Licentiate thesis, monograph (Other academic)
    Abstract [sv]

    Samarbete inom hälso- och sjukvård är grundläggande för att patienter ska få säker och bra vård. Laboratorier tillför viktiga pusselbitar för diagnos och behandling, vilket kräver integrering av kunskap mellan laboratorium och dess kunder. I det dagliga arbetet sker denna integrering primärt via ett informationssystem bestående av remisser och svar.



    Detta arbetes syfte är att ur ett relationsperspektiv beskriva, tolka och förklara den kunskapsintegrering som sker mellan olika grupper inom hälso- och sjukvård. En kvalitativ, tolkande fallstudie har genomförts vid ett mikrobiologiskt laboratorium och fyra av dess kunder. Två teoretiska källor communities of practice och kunskapsepisoder har sammanfogats till en övergripande analysmodell, vilken tillsammans med kompletterande teorier har använts i analysen.



    Studien visar hur kunskapsintegrering sker som en del av de dagliga arbetsprocesserna och vilka förutsättningar som bör finnas för att kunskapsintegreringen ska fungera. Studien visar också på problem som kan uppstå när förutsättningarna inte uppfylls. Den kunskap som integreras är en kombination av tyst och explicit samt individuell och organisatorisk kunskap, vilken successivt byggs upp hos såväl individer som grupper. Lyckad kunskapsintegrering bygger på förståelse för varandras perspektiv samt en vilja att förändra existerande kunskap. Hinder är brister eller avsaknande av feedback, intresse och motivation, tid för reflektion samt forum för perspektivskapande.



    May Wismén har sin tjänst vid Internationella handelshögskolan i Jönköping, är inskriven för forskarstudier vid Karlstads universitet och tillhör forskarskolan Management och IT

  • 5022.
    Wismén, May
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Carlsson, Sven
    A relational perspective on knowledge integration between self-contained work groups: a case study in the health care sector2006Conference paper (Refereed)
    Abstract [en]

    A main purpose of information systems (IS) is to support intra- and inter-organizational collaboration. From a collaboration perspective, information transfer gets a meaning if the transferred information is converted to knowledge. If we instead of an information perspective take a knowledge perspective on collaboration, stressing knowledge integration, many other factors than the IS itself and information characteristics will be critical. Working routines and the way information is interpreted, both by the sender and the receiver, will be stressed. Research focusing IS-supported collaboration and knowledge management is needed. This paper presents such an empirical study. Focus in the study is on knowledge integration between different self-contained work groups and the study explores how knowledge integration is accomplished and why the integration is not always simple and successful. The empirical context is the Swedish health care and more specifically, the daily knowledge integration between a microbiology laboratory and its customers. Empirical data was collected by interviews and observations, and analysed with help of a theoretical model constructed from two main theories: Community of Practice (CoP) and Knowledge Management Episodes. This model implies that knowledge should be seen as a process and in a relational perspective. The study shows that there is a mutual dependency between the IS and other knowledge resources in the organization. Even if the groups have the same overarching goals, regulations, and the same IS, the different groups create their own working routines, ways of interpreting information, and their own ways to convert information to knowledge. This situational and emergent development of work practice around IS suggests that management of existing IS and the implementation of new IS needs to stronger focus the mutual influence between IS and working activities and that feedback in the integration process is important

  • 5023.
    Wistrand, Kai
    Örebro University, Swedish Business School at Örebro University.
    Method rationale revealed: communication of knowledge in systems development methods2009Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The practice of developing information systems with the support of information systems development methods is not new. A vast number of systems development methods have been suggested over the years in an attempt to solve the problems a development organisation might encounter. From early approaches like the Waterfall model to more modern monolithic methods such as the Rational Unified Process and the newest approaches exemplified in the Agile methods, the ambition has often been to find the silver bullet and the most effective ways to produce quality systems.

    Methods are prescriptive by nature as they suggest action and as such they represent rationale. Thus, one can speak of a method rationale as the dimension within methods that motivate their existence. Method rationale is understood as the goal and value rational relations between a method’s underlying philosophy and its proposed actions.

    During the methods’ evolution, the practice of systems development and the supporting systems development methods have been subjected to research from many perspectives. One possible way to understand the nature of the existing research is to separate it into two fields. The suggested fields have different strengths and weaknesses. The field of traditional research on information systems development (ISD) emphasise relevance in their studies but often overlook aspects of generalisation. The field of method engineering (ME) is highly formalistic and emphasise rigour but often miss aspects concerning relevance, such as the role methods play in peoples daily systems development efforts. In this dissertation, a polarisation of existing systems development method research is suggested in order to find a synthesis more capable of serving as a common ground for method research and for the understanding of the systems development method phenomenon. This is achieved through a proposed extension of the field of ME into the field of extended method engineering (EME).

    The foundation of the EME is found in the concept of method rationale and a method component concept design capable of carrying and expressing method rationale. The method component concept design is applied, evaluated, and re-designed in three different empirical settings in order to ascertain its practical potential and the benefits in explicating the dimension of method rationale.

  • 5024.
    Wistrand, Kai
    et al.
    Örebro University, Department of Business, Economics, Statistics and Informatics.
    Karlsson, Fredrik
    Örebro University, Department of Business, Economics, Statistics and Informatics.
    Method components: rationale revealed2004Conference paper (Refereed)
  • 5025.
    Wistrand, Kai
    et al.
    Örebro University, Swedish Business School at Örebro University.
    Karlsson, Fredrik
    Örebro University, Swedish Business School at Örebro University.
    Ågerfalk, Pär J.
    Uppsala universitet, Uppsala, Sweden.
    Exploring the role of method rationale in the context of teaching information systems development methods2010In: Information systems development: towards a service provision society / [ed] George A. Papadopoulos ..., Heidelberg: Springer, 2010, p. 801-809Conference paper (Refereed)
    Abstract [en]

    Research has shown that traditional education in systems development has its limitations. This chapter draws on recent research on a component-based view of systems development methods. The aim is to explore the impact of applying a method rationale perspective during method teaching with regards to student’s abilities to reason about the suitability of a particular method to various development settings. A qualitative research approach was adopted, which used two different approaches to teaching a particular method to two groups of students. The students’ ability to reason about the method in modelling seminars and follow-up interviews was analysed. The results indicate that explicating method rationale in teaching methods may have a positive impact on students’ ability to reason about methods and method tailoring.

  • 5026. Witrant, E.
    et al.
    D'Innocenzo, A.
    Sandou, G.
    Santucci, F.
    Di Benedetto, M. D.
    Isaksson, A. J.
    Johansson, Karl Henrik
    KTH, School of Electrical Engineering (EES), Automatic Control. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
    Niculescu, S-I
    Olaru, S.
    Serra, E.
    Tennina, S.
    Tiberi, U.
    Wireless ventilation control for large-scale systems: The mining industrial case2010In: International Journal of Robust and Nonlinear Control, ISSN 1049-8923, E-ISSN 1099-1239, Vol. 20, no 2, p. 226-251Article in journal (Refereed)
    Abstract [en]

    This paper describes a new industrial case on automation, for large-scale systems with high environmental impact: the mining ventilation control systems. Ventilation control is essential for the operation of a mine in terms of safety (CO and NO, regulation) and energy optimization. We first discuss a novel regulation architecture, highlighting the interest for a model-based control approach and the use of distributed sensing capabilities thanks to a wireless sensor network (WSN). We propose a new model for underground ventilation. The main components of the system dynamics are described with time-delays, transmission errors, energy losses and concentration profiles. Two different model-based control approaches, which can embody the complex dynamics of the system, are proposed. The first one resorts to a nonlinear model predictive control strategy (receding horizon) and aims to energy minimization, thanks to a continuous operation of the fans. The second one, based on a hybrid description of the model and fans operation, provides automatic verification of the wireless control thanks to abstraction techniques. These control strategies are compared with simulations, in terms of regulation efficiency, energy consumption and the need for computational capabilities. The industrial case description and control strategies open new vistas for the development of global system approaches that allow for the optimization of energy consumption of complex large-scale systems.

  • 5027.
    Wittek, Peter
    et al.
    University of Borås, Swedish School of Library and Information Science.
    Darányi, Sándor
    University of Borås, Swedish School of Library and Information Science.
    Dobreva, Milena
    Matching Evolving Hilbert Spaces and Language for Semantic Access to Digital Libraries2010In: The Role of Digital Libraries in a Time of Global Change. Proceedings of the 12th International Conference on Asia-Pacific Digital Libraries, ICADL 2010, Gold Coast, Australia, June 21-25, 2010. / [ed] Gobinda Chowdhury, Chris Koo, Jane Hunter, Springer , 2010, p. 262-263Conference paper (Other academic)
    Abstract [en]

    Extended by function (Hilbert) spaces, the 5S model of digital libraries (DL) [1] enables a physical interpretation of vectors and functions to keep track of the evolving semantics and usage context of the digital objects by support vector machines (SVM) for text categorization (TC). For this conceptual transition, three steps are necessary: (1) the application of the formal theory of DL to Lebesgue (function, L2) spaces; (2) considering semantic content as vectors in the physical sense (i.e. position and direction vectors) rather than as in linear algebra, thereby modelling word semantics as an evolving field underlying classifications of digital objects; (3) the replacement of vectors by functions in a new compact support basis function (CSBF) semantic kernel utilizing wavelets for TC by SVMs.

  • 5028. Wißotzki, Matthias
    et al.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH. Research area Information Engineering.
    The Digital Business Architect - Towards Method Support for Digital Innovation and Transformation2017Conference paper (Refereed)
  • 5029. Wißotzki, Matthias
    et al.
    Sandkuhl, Kurt
    Jönköping University, School of Engineering, JTH, Computer Science and Informatics. Jönköping University, School of Engineering, JTH. Research area Computer Science and Informatics. Rostock University, Rostock, Germany.
    Smirnov, Alexander V.
    Kashevnik, Alexey
    Shilov, Nikolay
    Digital signage and targeted advertisement based on personal preferences and digital business models2017Conference paper (Refereed)
    Abstract [en]

    Digital signage in general refers to the provision of content (advertisements, news, assistance) on electronic scoreboards or large displays in places where many people are present or passing by. The more this content is expected to be tailored for specific user groups, the more context information is required, like, e.g., the preferences or profiles of target users or user groups. The ideal digital signage solution would be able to provide individualized content for the audience consuming the information at any time: if only one person is present, the content would be personalized for this person; if a group of persons is present the demand of all should be met. Based on a digital signage solution for elevator doors, the paper investigates the intersecting of preferences as a contribution to determine the most relevant content for a group of users. This intersection of preferences serves as a basis for new business models for interactive elevator digital signage. The main contributions of the paper are (1) an industrial case of digital business model innovation motivating contextual digital signage, (2) a technical approach for intersecting personal preferences, and (3) a methodical approach for digital business model innovation.

  • 5030. Wohed, P.
    et al.
    Andersson, Birger
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Meta-modelling as a means for improved communication and interoperability: The case of frisco2005Conference paper (Refereed)
    Abstract [en]

    Unclear and disparate terminology are causing problems in the area of information system development. To address these issues, modelling frameworks and ontologies based on solid philosophical and logical foundations have been developed. Hypothesizing that a diagrammatic interface will be beneficial for comprehension and communication resulting in wider dissemination, we propose a UML-based meta-model of one of those frameworks-Frisco. The analysis done during the development of the meta-model resulted in identification of a number of ambiguities in the framework. Discussion of these as well as suggestions of ways to solve them are also presented.

  • 5031. Wohed, P.
    et al.
    Andersson, Birger
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Reconciliation of two business modelling frameworks2005Conference paper (Refereed)
    Abstract [en]

    Addressed in this paper is the problem of conceptual heterogeneity within the field of information systems. Two frameworks, Frisco and Söderström, each reflecting this heterogeneity, are presented. They are analysed and an reconciliation attempt of them is provided. The reconciliation points at some strengths and weaknesses in each framework.

  • 5032.
    Wohed, Petia
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Truffet, David
    .., , .
    Juell-Skielse, Gustaf
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Business Process Management for Open E-services in Local Government - Experience Report2011Conference paper (Refereed)
  • 5033.
    Woldemariam, Yonas
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Sentiment Analysis in A Cross-Media Analysis Framework2016In: PROCEEDINGS OF 2016 IEEE INTERNATIONAL CONFERENCE ON BIG DATA ANALYSIS (ICBDA), 2016, p. 27-31Conference paper (Refereed)
    Abstract [en]

    This paper introduces the implementation and integration of a sentiment analysis pipeline into the ongoing open source cross-media analysis framework. The pipeline includes the following components; chat room cleaner, NLP and sentiment analyzer. Before the integration, we also compare two broad categories of sentiment analysis methods, namely lexicon-based and machine learning approaches. We mainly focus on finding out which method is appropriate to detect sentiments from forum discussion posts. In order to conduct our experiments, we use the apache-hadoop framework with its lexicon-based sentiment prediction algorithm and Stanford coreNLP library with the Recursive Neural Tensor Network (RNTN) model. The lexicon-based uses sentiment dictionary containing words annotated with sentiment labels and other basic lexical features, and the later one is trained on Sentiment Treebank with 215,154 phrases, labeled using Amazon Turk. Our overall performance evaluation shows that RNTN outperforms the lexicon-based by 9.88% accuracy on variable length positive, negative, and neutral comments. How-ever, the lexicon-based shows better performance on classifying positive comments. We also found out that the F1-score values of the Lexicon-based is greater by 0.16 from the RNTN.

  • 5034.
    Wortley, David
    et al.
    European Chapter of the International Society of Digital Medicine, Alderton, United Kingdom.
    An, Ji-Young
    Office of Public Health Studies, University of Hawaii, Honolulu, HI, United States.
    Heshmati, Almas
    Jönköping University, Jönköping International Business School, JIBS, Economics. Department of Economics, Sogang University, Seoul, Korea.
    Tackling the challenge of the aging society: Detecting and preventing cognitive and physical decline through games and consumer technologies2017In: Healthcare Informatics Research, ISSN 2093-3681, E-ISSN 2093-369X, Vol. 23, no 2, p. 87-93Article in journal (Refereed)
    Abstract [en]

    Objectives: This study seeks to review some of the approaches employed to address health and well-being issues in the elderly population.

    Methods: This article reviews and analyses a range of projects and approaches designed for the elderly population and aimed at preserving and/or enhancing physical and cognitive capabilities in later life.

    Results: Various intervention measures have been developed across the globe to preserve and/or enhance physical and cognitive capabilities of the elderly population. A selection of these measures is described in this article.

    Conclusions: Approaches which combine games psychology and mechanics with enabling technologies designed to engage, influence and motivate elderly people can encourage healthy active aging lifestyles. Healthy active aging helps to realise a double dividend of reduced healthcare costs and an improved quality of life for the elder citizen. 

  • 5035.
    Wrigstad, Tobias
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Ownership-Based Alias Managemant2006Doctoral thesis, monograph (Other scientific)
    Abstract [en]

    Object-oriented programming relies on sharing and the mutable states of objects for common data structures, patterns and programming idioms. Sharing and mutable state is a powerful but dangerous combination. Uncontrolled aliasing risks causing representation exposure, where an object's state is exposed and modifiable out of the control of its conceptually owning object. This breaks encapsulation, and hence, in extension, abstraction.

    Contemporary object-oriented programming languages' support for alias encapsulation is mediocre and easily circumvented. To this end, several proposals have been put forward that strengthen encapsulation to enable construction of more reliable systems and formally reasoning about properties of programs. These systems are vastly superior to the constructs found in for example C++, Java or C#, but have yet to gain acceptance outside the research community.

    In this thesis, we present three constructs for alias management on top of a deep ownership types system in the context of the Joline programming language. Our constructs are fully statically checkable and impose little run-time overhead. We show the formal semantics and soundness proof for our constructs as well as their formal and informal aliasing properties. We show applications and extensions and perform a practical evaluation of our system with our implemented Joline compiler. The evaluation suggests that our constructs are compatible with real-world programming, makes use of some of our own proposed patterns, and encourages further practical studies of programming with ownership-based constructs for alias management.

  • 5036. Wu, Z.
    et al.
    Cao, J.
    Mao, Bo
    KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
    Wang, Y.
    Semi-SAD: Applying semi-supervised learning to shilling attack detection2011In: RecSys - Proc. ACM Conf. Recomm. Syst., 2011, p. 289-292Conference paper (Refereed)
    Abstract [en]

    Collaborative filtering (CF) based recommender systems are vulnerable to shilling attacks. In some leading e-commerce sites, there exists a large number of unlabeled users, and it is expensive to obtain their identities. Existing research efforts on shilling attack detection fail to exploit these unlabeled users. In this article, Semi-SAD, a new semi-supervised learning based shilling attack detection algorithm is proposed. Semi-SAD is trained with the labeled and unlabeled user profiles using the combination of naïve Bayes classifier and EM-λ, augmented Expectation Maximization (EM). Experiments on MovieLens datasets show that our proposed Semi-SAD is efficient and effective.

  • 5037.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Fischer-Hübner, Simone
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT.
    The Users' Mental Models' Effect on their Comprehension of Anonymous Credentials2011In: Privacy and Identity Management for Life / [ed] Camenisch, J.; Fischer-Hübner, S.; Rannenberg, K., Heidelberg: Springer , 2011, p. 233-244Chapter in book (Other academic)
    Abstract [en]

    Anonymous Credentials are a key technology for enforcing data minimisation for online applications. The design of easily understandable user interfaces for the use of anonymous credentials is however a major challenge, as end users are not yet familiar with this rather new and complex technology and no obvious real-world analogies exist for them. In this chapter, we analyse what effects the users’ mental models have on their understanding of the data minimization property of anonymous credentials in the context of an e-Shopping application scenario. In particular, we have investigated the effects of the mental models of a card-based user interface approach and an attribute-based user interface approach and compared these in terms of errors of omission and addition. The results show that the card-based approach leads to significantly more errors of addition (i.e., users believe that they have disclosed more information than they actually have) whereas the attribute-based approach leads to more errors of omission (i.e., users underestimate the amount of data that they have disclosed).

  • 5038.
    Wästlund, Erik
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Psychology. Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Service Research Center.
    Wolkerstorfer, Peter
    Austria.
    PET-USES2011In: Privacy and Identity Management for Life / [ed] Camenisch, Fischer-Hübner, Rannenberg, Heidelberg: Springer Berlin/Heidelberg, 2011Chapter in book (Other academic)
  • 5039. Wäyrynen, Jaana
    et al.
    Bodén, Marine
    Boström, Gustav
    KTH, Superseded Departments, Computer and Systems Sciences, DSV.
    Security engineering and eXtreme programming: An impossible marriage?2004In: EXTREME PROGRAMMING AND AGILE METHODS - XP/ AGILE UNIVERSE 2004, PROCEEDINGS / [ed] Zannier C, Erdogmus H, Lindstrom L, Berlin: Springer , 2004, p. 117-128Conference paper (Refereed)
    Abstract [en]

    Agile methods, such as eXtreme Programming (XP), have been criticised for being inadequate for the development of secure software. In this paper, we analyse XP from a security engineering standpoint, to assess to what extent the method can be used for development of security critical software. This is done by analysing XP in the light of two security engineering standards; the Systems Security Engineering-Capability Maturity Model (SSE-CMM) and the Common Criteria (CC). The result is that XP is more aligned with security engineering than one might think at first. However, XP also needs to be tailored to better support and to more explicitly deal with security engineering issues. Tailoring XP for secure software development, without removing the agility that is the trademark of agile methods, may be a solution that would make XP more compatible with current security engineering practices.

  • 5040. Xia, Ruixue
    et al.
    Rost, Mattias
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Holmquist, Lars Erik
    Business Models in the Mobile Ecosystem2010In: ICMB/GMR 2010, IEEE Computer Society , 2010Conference paper (Other academic)
  • 5041.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kanter, Theo
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rahmani, Rahim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    An Ontology-based Problem-logic Driven Approach towards the Activity Awareness for Elderly Care2015In: International Journal of Multimedia and Ubiquitous Engineering, ISSN 1975-0080, Vol. 10, no 4, p. 31-42Article in journal (Refereed)
    Abstract [en]

    The same activity under different user situations in the elderly care system may lead to different intelligent system response, since user needs vary with the changing situations. Activity awareness (AA) emphasizes that systems intelligently respond to user needs by aware the user-performed activities which is denoted and comprehended according to various user situations. But most current AA technics use similar patterns retrieved from the growing historical data, neglecting the situation change, called dataset driven. Thus, an aptly approach is needed in support of AA systems to handle various activity denotations in different user situations. Responding to the problem, this paper proposes an Ontology-based Problem-logic driven approach (OPL) to enhance the AA system by denoting user activities with the problem logic according to user-oriented denoted problem domains, where the AA system can seamlessly integrate with inferring for intelligent system response. Specifically, denoted problem domain and logic are proposed to support the OPL concepts, while activity graph is formed to support the intelligent system response based on the annotated problem logic. With the OPL, systems can directly target at the changing situations with rule-based inferring. A case study is performed upon the scenario retrieved from a European elderly care project, where a proof-of-concept prototype is established to confirm the validity of the OPL approach.

  • 5042.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kanter, Theo
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rahmani, Rahim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Constructing Context-centric Data Objects to Enhance Logical Associations for IoT Entities2015In: Procedia Computer Science, ISSN 1877-0509, E-ISSN 1877-0509, Vol. 52, p. 1095-1100Article in journal (Refereed)
    Abstract [en]

    Entities in Internet of Things (IoT) need intelligent associations to allow a flexible and dynamic system reaction towards varying user situations. Purely data-oriented association methods (e.g., data-mining, machine-learning, etc.) are limited in deduction from existing associations. Also such data-oriented methods are limited in accuracy for working with small-scale datasets (e.g., working with patterns retrieved from historical data), outputting associations based on statistics rather than logic. Moreover, existing semantic technologies (ontological-oriented or rule-oriented) are facing with either flexibility or dynamicity challenges to discover and maintain the associations. This paper proposes an alternative technique of semantically constructing context-centric data objects based on service logics for logical associations, which enables an event net based on association nets adapting for the changing situations (called context-centric). A proof-of-concept implementation is carried out based on a vehicle planning scenario to validate the data construction technique. Comparing to previous work, this technique possesses advantages of flexibility and dynamicity for entity associations based on service logics.

  • 5043.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kanter, Theo
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rahmani, Rahim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Generic Distributed Sensing in Support of Context Awareness in Ambient Assisted Living2014In: Multimedia and Ubiquitous Engineering / [ed] Park, J. J.; Chen, S. C.; Gil, J. M.; Yen, N. Y., Springer Berlin/Heidelberg, 2014, p. 99-107Conference paper (Refereed)
    Abstract [en]

    Researches in ambient assisted living have so far faced three important challenges: (1) Lack of a comprehensive approach to capture user needs that are generic; i.e., not limited to specific events, but as generic related to the user. (2) Lack of a highly flexible and scalable platform for the distributed sharing and processing of context between nodes in IoT networks. (3) Increased amount of communication and devices with sensors participating in the acquisition, processing and sharing of context further challenges both computation capability and storage capacity of the system. In this paper, we address these limitations and present novel support, applied in a system for remote assistance of elderly. The support comprehensively retrieves user needs from generic context, via a scalable overlay providing increment of processing capability and storage. Further, the support self-organizes entities into generic context from distributed sensing, using the Dependent Context Pattern (DCP) based on the Context Virtualizing Platform (CVP).

  • 5044.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Kanter, Theo
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rahmani, Rahim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Logical interactions for heterogeneous IoT entities via virtual world mirrors in support of Ambient Assisted Living2016In: Journal of Ambient Intelligence and Smart Environments, ISSN 1876-1364, E-ISSN 1876-1372, Vol. 8, no 5, p. 565-580Article in journal (Refereed)
    Abstract [en]

    In Ambient Assisted Living (AAL), as an important applied area of Internet of Things (IoT) technology, logical entity interaction establishes an intelligent virtual world in which heterogeneous entities are emulated by object-oriented mirrors through tightly cooperating sensors and actuators from different spaces in the real world; this enables the system to generate intelligent services to support human behaviour. However, until now, few researchers have focused on enabling interactions between heterogeneous IoT entities for AAL services. Further, in relevant studies regarding semantic entity interactions, researchers have mainly focused on enabling semantic interactions between sensors (rather than integral entities) for the purpose of coordinating and managing data resources, where tight collaborations between sensors and actuators are not emphasised. Hence, the system capability of initialising intelligent service to enhance human experience has not been properly emphasised, to date. This paper discusses enabling logical object-oriented IoT entity interactions to enrich AAL services for humans through the creation of mirrors in the virtual world emulating the attributes and behaviours of heterogeneous entities via cooperating sensors and actuators in the real world. This paper introduces the Entity Device Collocating (EDC) Platform to globally locate and retrieve sensors and actuators respectively adhering to the attributes and behaviours of integral mirrors in the virtual world; this is intended to enable the interoperability between virtual and real worlds. Interactions are created upon entity mirrors mapping entities from the physical world to the virtual world, during which interactions continue to evolve based on the service logics. The proposed technique is applied to a typical AAL case of smart pill-ingestion, where a demo is implemented for verification. Comparing with relevant research, the proposed technique contributes by introducing a flexible and scalable IoT entity interaction method targeting AAL to address human needs.

  • 5045.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rahmani, Rahim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    A deep relation learning method for IoT interoperability enhancement within semantic formalization framework2017In: Proceedings of the Second International Conference on Internet of things and Cloud Computing, Association for Computing Machinery (ACM), 2017, article id 149Conference paper (Refereed)
    Abstract [en]

    Internet of Things (IoT) is facing with the interoperability issue due to the massive amount of heterogeneous entities (both physical and virtual entities) constantly generating heterogeneous data objects; semantic formalization has been widely recognized as a basis for the IoT interoperability, by which IoT can acquire the ability to comprehend data and further recognize the logic relations among heterogeneous IoT entities and heterogeneous data objects, thus to establish mutual understanding between each other to support with interoperability. Even semantic-driven track has emphasizes a lot on the logic relations in connection to the service rules and policies for interoperability, it is important that the quantity-driven relations should be also explored with adhering to the framework of semantic formalization. This paper explores a Deep Recursive Auto-encoders formed data relation learner in line with the semantic framework, which supports the data interoperability enhancement in a quantity-driven way based on the logic-driven framework. The learner starts with representing the virtual IoT entities via feature extraction; based on that, learner is trained in a manner of considering the surrounding relations of the targeted entity. As a baseline, a contrast learner with "regular" structure has been proposed which cannot functionally support semantic framework, even though the semantic formalization is indispensable; regardless the limitations in lab environment, the conducted experiments show that the proposed learner performs a bit better than the contrast learner under the same conditions. So that, the proposed method can synergistically enhances the interoperability within a semantic formalization framework.

  • 5046.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Rahmani, Rahim
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Li, Yuhong
    Gillblad, Daniel
    Kanter, Theo
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Intelligent Data-Intensive IoT: A Survey2016In: 2016 2nd IEEE International Conference on Computer and Communications (ICCC): Proceedings, IEEE Computer Society, 2016, p. 2362-2368Conference paper (Refereed)
    Abstract [en]

    The IoT paradigm proposes to connect entities intelligently with massive heterogeneous nature, which forms an ocean of devices and data whose complexity and volume are incremental with time. Different from the general big data or IoT, the data-intensive feature of IoT introduces several specific challenges, such as circumstance dynamicity and uncertainties. Hence,intelligence techniques are needed in solving the problems brought by the data intensity. Until recent, there are many different views to handle IoT data and different intelligence enablers for IoT, with different contributions and different targets. However, there are still some issues have not been considered. This paper will provide a fresh survey study on the data-intensive IoT issue. Besides that, we conclude some shadow issues that have not been emphasized, which are interesting for the future. We propose also an extended big data model for intelligent data-intensive IoT to tackle the challenges.

  • 5047.
    Xiao, Bin
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    Zeeshan Asghar, Muhammad
    university of Oulu, faculty of science , department of information processing science .
    Jämsä, Tapani
    university of Oulu , faculty of science , department of information processing science.
    Pulli, Petri
    university of Oulu, faculty of science , department of information processing science.
    “Canderoid”: A mobile system to remotely monitor travelling status of the elderly with dementia2013In: International Joint Conference on Awareness Science and Technology and Ubi-Media Computing (iCAST-UMEDIA), 2013, IEEE Press , 2013, p. 648-654Conference paper (Refereed)
    Abstract [en]

    The number of elderly people increases quickly in many countries, under the global population aging situation. It is an upsetting fact that many elderly people are suffering from the dementia, which seriously obstructs their independent living and travel. It is a pervasive problem that the demented elderly individuals are easy to get lost or go into danger during alone travel in daily life. Therefore we propose a novel mobile system named “Canderoid” to monitor independent outdoor travel of the elderly individuals remotely, with aid from the caretaker. The system is composed mainly of an android terminal (Wanderoid), an MQTT broker, and a platform on caretaker side. In the system, an android terminal named “Wanderoid” is implemented on a smartphone to capture the travelling status, using built-in smartphone sensors (i.e. camera with an adhesive fish-eye lens, compass and GPS). The terminal device is a normal smartphone, with a fish-eye lens attached on the camera. The sensor data are transferred to the platform of caretaker after capturing. The data transmission work relies on a message pushing architecture, which deals with mobile IP address changing and enables remote manipulation of the smartphone terminal, by introducing the MQTT broker. Then the caretaker platform can interpret sensor data and real-timely present the travelling status using snapshot taken by the fish-eye camera, street view and map. A reliability test, energy dissipation test and usability test are carried out on the prototype to verify that the system is effective, easy-to-use, reliable and energy-saving, from the viewpoints of both technology and human factors.

  • 5048. Xiao, Jun
    et al.
    Xu, Zhen
    Yu, Ye
    Cai, Shuo
    Hansen, Preben
    Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
    The Design of Augmented Reality-Based Learning System Applied in U-Learning Environment2016In: E-Learning and Games: 10th International Conference, Edutainment 2016, Hangzhou, China, April 14-16, 2016, Revised Selected Papers / [ed] Abdennour El Rhalibi, Feng Tian, Zhigeng Pan, Baoquan Liu, Springer, 2016, p. 27-36Conference paper (Refereed)
    Abstract [en]

    The easy and widely accessibility of Internet resources makes it possible to support learning almost anywhere at any time through powerful mobile technologies, and facilitate ubiquitous learning (u-learning) to grow in use and popularity. Augmented Reality (AR) can be recognized as a key technology that can be used in the U-learning environment to increase learning effect and improve learning experience. This paper designs an integrated model of U-learning, based on which we have also developed an augmented reality technology based learning system named as “Starry Sky Exploration—Eight Planets of Solar System”; an analysis on its implementation is reported and the AR learning system applicable for U-learning environment is found effective and practical.

  • 5049.
    Xiao, Ming
    et al.
    KTH, School of Electrical Engineering (EES), Communication Theory.
    Aulin, Tor M.
    A physical layer aspect of network coding with statistically independent noisy channels2006In: 2006 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-12, 2006, Vol. 9, p. 3996-4001Conference paper (Refereed)
    Abstract [en]

    We investigate the physical layer bit error probability (BEP) of a network using network coding (coded network). The network consists of statistically independent noisy channels. Thus, transmitted bits are subject to the noise disturbance. An error marking algorithm is given to calculate the error weight (the number of erroneous bits) in the sinks. Then we can calculate the sink BEP of a coded network from the channel BEPs. We formulate the minimizing BEP problem. We show that coding schemes with the same flow may have different sink BEPs. Two approaches are suggested to reduce the complexity.

  • 5050. Xu, Luzhou
    et al.
    Stoica, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
    Li, Jian
    A block-diagonal growth curve model2006In: Digital signal processing (Print), ISSN 1051-2004, E-ISSN 1095-4333, Vol. 16, no 6, p. 902-912Article in journal (Refereed)
    Abstract [en]

    We consider a variation of the growth curve (GC) model, referred to as the block-diagonal growth curve (BDGC) model, where the unknown regression coefficient matrix is constrained to be block-diagonal. A closed-form approximate maximum likelihood (AML) estimator for this model is derived based on the maximum likelihood principle. We analyze the statistical properties of this method theoretically and show that the AML estimate is unbiased and asymptotically statistically efficient for a large snapshot number. Via numerical examples in wireless communications, we also show that the proposed AML estimator can achieve excellent estimation accuracy.

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