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  • 201.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Henkel, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kowalski, Stewart
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Technology Enhanced Learning of Modeling Skills in the Field of Information Systems2015Inngår i: IADIS international conference on information systems, 2015 / [ed] Miguel Baptista Nunes, Pedro Isaías and Philip Powell, IADIS Press, 2015, s. 121-128Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper reports on a project aimed at using simulation for improving the quality of teaching and learning in the field of Information Systems. More specifically, the project goal was facilitating the students to acquire skills of building models of organizational structure and behavior through analysis of internal and external documents, and interviewing employees and management. The solution tested in the project was a computerized environment utilizing multi-media to simulate a business case. The paper gives an overview of the problem that the solution addresses, presents the solution, and reports on a trial completed in a first year undergraduate course at Stockholm University. The results of the trial indicate that using rich multi-media along with a case based learning approach did improve the overall performance of the students. It was also shown that both students’ and the teachers’ attitude toward the solution was positive.

  • 202.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Henning, Otto
    Modeling a Global Software Development Project as a Complex Socio-Technical System to Facilitate Risk Management and Improve the Project Structure2015Inngår i: Conference on Global Software Engineering (ICGSE), 2015 IEEE 10th International conference,13-16 july, 2015: 2015 IEEE 10th International Conference on Global Software Engineering, Ciudad Real, 13-16 july, 2015, IEEE Computer Society, 2015, s. 1-12Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Any global software development project needs to deal with distances -- geographical, cultural, time zone, etc. -- between the groups of developers engaged in the project. To successfully manage the risks caused by such distances, there is a need to explicate and present the distances in a form suitable for manual or semi-automatic analysis, the goal of which is to detect potential risks and find ways of mitigating them. The paper presents a technique of modeling a global software development project suitable for such analysis. The project is modeled as a complex socio-technical system that consists of functional components connected with each other through output-input relationships. The components do not coincide with the organizational units of the project and can be distributed through the geographical and organizational landscape of the project. The modeling technique helps to explicate and represent various kinds of distances between the functional components to determine which of them constitute risk factors. The technique was developed during two case studies, of which the second is used for presenting and demonstrating the new modeling technique in the paper.

  • 203.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. IbisSoft AB, Stockholm, Sweden.
    Jalali, Amin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Agile business process development: why, how and when — applying Nonaka’s theory of knowledge transformation to business process development2016Inngår i: Information Systems and E-Business Management, ISSN 1617-9846, E-ISSN 1617-9854, Vol. 14, nr 4, s. 693-731Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The traditional way of business process development is via creating a detailed model of a business process in question, acquiring an IT-system to support it, and then implementing it in the organizational practice. Acquiring a system can be done via designing and manufacturing it by the business itself, or via commissioning it to somebody else. Alternatively, a generic system can be bought and configured according to the business process model created. The traditional approach has a number of risks that become visible only during the latest phase of introducing the system in the organizational practice, e.g., when it becomes clear that the system does not fit the business and/or people who work in it. These risks could be mitigated by using an agile approach to the development of business processes. In agile approach: (a) the phases of process modeling, IT-system design, and manufacturing are merged into one, and (b) instead of using one big cycle, a series of smaller development cycles is used. The paper discusses what is needed to implement the agile approach, and in which business situations the agile approach is the most appropriate. Examples of tools to support agile development are presented and analyzed. The results presented in the paper have been achieved based on the knowledge transformation perspective along the lines suggested by Nonaka in SECI model. The modification of this model has been used to understand the risks and requirements connected to a particular process development strategy.

  • 204.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Jalali, Amin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Limiting Variety by Standardizing and Controlling Knowledge Intensive Processes: Case Study and Reflection on Experience2016Inngår i: 2016 IEEE 20th International Enterprise Distributed Object Computing Workshop (EDOCW): Proceedings / [ed] Remco Dijkman, Luís Ferreira Pires, Stefanie Rinderle-Ma, IEEE Computer Society, 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper studies the effects of applying process improvement principles to knowledge-intensive processes, which are typical for being supported by Adaptive Case Management systems. The study is being completed by investigating a process of conducting a small-scale research project that results in BS or MS thesis being defended and graded. The research is a mixture of the case study at the department with which both authors are affiliated and reflections on own experience as active participants of the process. The preliminary results show that the improvement principles applied in the project have helped to smoothen the process and improve its outcome in terms of producing defendable theses that satisfy the requirements set by the relevant authority. However, it seems they might not positively affect other outcomes, like the size and quality of research contribution.

  • 205.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Jalali, Amin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Ohlsson, Jens
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Adaptive Case Management as a Process of Construction of and Movement in a State Space2013Inngår i: On the Move to Meaningful Internet Systems: OTM 2013 Workshops: Proceedings / [ed] Yan Tang Demey, Hervé Panetto, Springer Berlin/Heidelberg, 2013, s. 155-165Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Despite having a number of years of experience, adaptive case management (ACM) still does not have a theory that would differentiate it from other paradigms of business process management and support. The known attempts to formalize Case Management do not seem to help much in creating an approach that could be useful in practice. This paper suggests an approach to building such a theory based on generalization of what is used in practice on one hand and the state-oriented view on business processes on the other. In practice, ACM systems use a number of ready-made templates that are picked up and filled as necessary for the case. State-oriented view considers a process instance/case as a point moving in a specially constructed state space. This paper suggests considering a case template as a definition of a sub-space and piking different template on the fly as constructing the state space along with moving in it when filling the template. The result is similar to what in control-flow based theories are considered as a state space with variable numbers of dimensions. Beside suggestions to building a theory, the paper demonstrates the usage of the theory on an example.

  • 206.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Jalali, Amin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Söderström, David
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Creating Self-Managed Cross-Professional Teams with Metaphoric Business Process Support Systems2015Inngår i: International Conference on Business Process Modeling, Development, and Support (BPMDS), Springer Publishing Company , 2015Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The typical values that can be obtained by employing a business process support (BPS) system are optimization, compliance to rules and regulations, leanness, etc. These are obtained by introducing a kind of “conveyor belt” in business processes. While these values can be important for some processes at some phases of the enterprise development, they can be counter-productive for other processes and other phases. This idea paper investigates a possibility of obtaining completely different value from a BPS system, namely it serving as a means of creating self-managed/self-directed cross-professional teams of process participants. The paper suggests using visualized folk and fairy tales and interactive game technology as a basis for building BPS systems that can bring this value. The discussion is done based on the example of representing a consultative sales process using a treasure hunting plot.

  • 207.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    A strategy for merging social software with business process support2011Inngår i: Business Process Management Workshops, BPM 2010, Springer , 2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Contemporary social software and business process support systems utilize different architectural principals. While social software employs the idea of shared spaces for communication/collaboration, most of the contemporary business process support systems employ a workflow engine to coordinate the work of people engaged in the given business process. There are two alternatives when developing a system that provides business process support enhanced with properties of social software. One alternative is to create a mixed shared spaces/workflow architecture. The other alternative is to find a way of both type of systems using the same architectural principle, either shared spaces, or workflow, before trying to merge the two types of systems into one. The paper explores the second alternative, namely, first, moving business process support to the shared spaces architecture, and then adding features typical for social software. The paper discusses the role of shared spaces in business process support systems, sets requirements on their structure and usage, and outlines potential benefits of using shared spaces from the business point of view. Then, the paper shows how the requirements set on the structure and usage of the shared spaces can be implemented in practice, and how typical features such as blogs/forums found in social

  • 208.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Design science research as movement between individual and generic situation-problem-solution spaces2012Inngår i: Lecture Notes in Information Systems and Organisation, Berlin/Heidelberg: Springer , 2012, s. 35-61Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    Design science is an emerging research paradigm in the Information Systems area. A design science project typically includes the activities of problem analysis, requirements definition, artifact development, and evaluation. These activities are not to be seen as sequential but can be carried out in any order. The purpose of this paper is to propose a conceptualization and formalization of design science research that show the possible ways in which a design science project can be carried out. The proposal is based on the state oriented view on business processes and suggests that design science research can be viewed as movements in a space of situations, problems and solutions.

  • 209.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Do workflow-based systems satisfy the demands of the agile enterprise of the future?2013Inngår i: Business Process Management Workshops: BPM 2012 International Workshops. Revised Papers / [ed] Marcello La Rosa, Pnina Soffer, Springer Berlin/Heidelberg, 2013, s. 59-64Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Workflow-based systems dominate the theory and practice of Business Process Management (BPM) leaving little space to other directions, including Adaptive Case Management. While there are reasons for such dominance in today's enterprise environment, it is time the BPM community studied this dominance in the light of the requirements of the enterprises of the future. This paper analyzes whether workflow-based systems will be able to satisfy business needs in the future based on the assumption that the essential property of the enterprise of the future is agility. The paper identifies properties that a business process should possess in order to be suitable for employing a workflow-based system to support it. Then, it analyzes whether these properties are compatible with the needs of the enterprise of the future and shows why workflow-based systems may become obsolete in the future.

  • 210.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Justifying ACM: why we need a paradigm shift in BPM2014Inngår i: Empowering knowledge workers: new ways to leverage case management / [ed] Layna Fischer, Lighthouse Point: Future Strategies Incorporated , 2014Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 211.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Using Empirical Knowledge and Studies in the Frame of Design Science Research2013Inngår i: Design Science at the Intersection of Physical and Virtual Design: The 8th International Conference, DESRIST 2013. Proceedings / [ed] Jan vom Brocke, Riitta Hekkala, Sudha Ram, Matti Rossi, Springer Berlin/Heidelberg, 2013, s. 463-470Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The focus of this research in progress is relationships between Design Science Research (DSR) on one hand, and Empirical Research (ER) on the other. More specifically, it is devoted to investigating which tasks included in a DSR project should/could require conducting ER studies or using already existing ER knowledge. The paper presents a methodology for enumerating DSR tasks and gives examples of logical analysis of some of them to determine requirements or usability of ER studies or ER-related knowledge for completing these tasks. The enumeration of DSR tasks is done by considering possible trajectories of DSR projects in a specially constructed state space. The latter consists of two subspaces; one is the space of specific situations, problems and solutions, the other – of generic situations, problems and solutions. The first subspace represents test cases used for validating DSR hypotheses that the second subspace represents. In the terms of this space, DSR is considered to be a way of generating and testing hypotheses for future adoption. The project trajectory is identified via movements within and between subspaces. Examples of such movements are: generalization of a specific situation/problem, designing a generic solution, evaluating the results of implementing a solution in a specific situation.

  • 212.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik A
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    In Search of the Holy Grail: Integrating social software with BPM Experience report2010Inngår i: Enterprise, Business-Process and Information Systems Modeling: / [ed] Ilia Bider, Berlin: Springer Verlag , 2010, s. 1-13Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    The paper is devoted to finding a view on business processes that helps to introduce into business process support systems a notion of shared spaces widely used in social software. The paper presents and analyses the experience of the authors from a number of development projects aimed at building business process support systems. The authors define a role that shared spaces can play in business process support and set some requirements on the shared space structure based on this role. They then analyze their projects in order to show how these requirements can be met and describe what practical results have been achieved in each project.

  • 213.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johansson, Lena
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Design Science in Action: Developing a Framework for Introducing IT Systems into Operational Practice2012Inngår i: Proceedings of the International Conference on Information Systems, ICIS 2012 / [ed] Joey, F. George, Association for Information Systems, 2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper presents an example of using design science research for solving a problem arising from local practice. The problem concerns adoption of new technology. The paper aims to integrate existing approaches and theories of technology acceptance and change management in a framework useful for practical purposes. It is based on the idea that the successful introduction of an IT system requires a number of conditions to be satisfied as well as means for bringing about the satisfaction of these conditions. The level of satisfaction of the conditions can be measured by a set of parameters, such as the level of strategic, tactical and operational understanding of the system by the users. Means include various types of actions, tools and strategies. The introduction process is steered via periodically measuring the parameters, and applying means that help to change the level of satisfaction of the conditions.

  • 214.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. IbisSoft AB, Stockholm, Sweden.
    Karapantelakis, Athanasios
    Khadka, Nirjal
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Building a High-Level Process Model for Soliciting Requirements on Software Tools to Support Software Development: Experience Report2013Inngår i: PoEM Short Papers: Short Paper Proceedings of the 6th IFIP WG 8.1 Working Conference on the Practice of Enterprise Modeling (PoEM 2013) / [ed] Janis Grabis, Marite Kirikova, Jelena Zdravkovic, Janis Stirna, 2013, s. 70-82Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Use of software tools to support business processes is both a possibility and necessity for both large and small enterprises of today. Given the variety of tools on the market, the question of how to choose the right tools for the process in question or analyze the suitability of the tools already employed arises. The paper presents an experience report of using a high-level business process model for analyzing software tools suitability at a large ICT organization that recently transitioned to scrum-based project methodology of software development. The paper gives overview of the modeling method used, describes the organizational context, presents a model built, and discusses preliminary findings based on the analysis of the model.

  • 215.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. IbisSoft AB, Stockholm, Sweden .
    Kowalski, Stewart
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    A Framework for Synchronizing Human Behavior, Processes and Support Systems Using a Socio-technical Approach2014Inngår i: Enterprise, Business-Process and Information Systems Modeling: Proceedings, Springer Berlin/Heidelberg, 2014, s. 109-123Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper suggests a framework for achieving alignment between a process and its external and internal environment. The framework consists of two components. The first component concerns alignment between the process and its external environment - business environment in which the process functions or is to function. The second component concerns alignment between the process and its internal environment the most important part of which are people participating in the process. The second component, which is in the focus of the paper, is based on the socio-technical view on information systems. The framework is aimed to move the focus of business process reengineering/ improvement from local optimization through the use of technology to the needs of satisfying business goals, and fostering human capital that is needed to achieve them.

  • 216.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Nurcan, Selmin
    Schmidt, Rainer
    Soffer, Pnina
    Preface: BPMDS 20142014Inngår i: BPMDS 2014, Springer , 2014Konferansepaper (Annet vitenskapelig)
  • 217.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Olsson, Sofia
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Stray lamb - misalignment in a socio-technical structure of an enterprise when transitioning to intelligent products2016Inngår i: STPIS 2016: Socio-Technical Perspective in IS Development: Proceedings of the 2nd International Workshop on Socio-Technical Perspective in IS Development co-located with 28th International Conference on Advanced Information Systems Engineering (CAiSE 2016) / [ed] Stewart Kowalski, Peter M. Bednar, Ilia Bider, 2016, s. 25-38Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Products from traditional engineering companies, such as cars and refrigerators, are evolving to become intelligent via combining hardware, software, sensors, and connectivity/networks. In such products, the importance of software increases exponential. Therefore, new software development units are emerging. This may cause misalignment between the traditional parts of the engineering companies and the new emerging software development units. The misalignment concerns both the technical part of the socio-technical structure of the companies, i.e. a conflict between different project management methodologies in the units, and the social part, i.e. the power roles of different unis and coordination between them. Viable System Model (VSM) has been applied to study the nature of misalignment in one such company, a large car manufacturer. This paper reports on the experience obtained during this study. With the help of VSM, misalignment was identified and diagnosed as a “stray lamb” – a pathological archetype related to a new and important unit of the company not being properly incorporated into the rest of the system.

  • 218.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Challenges in Assessing Parameters of a Socio-Technical System2017Inngår i: Proceedings of STPIS 2017: Socio-Technical Perspective in IS development / [ed] Stewart Kowalski, Peter Bednar, Ilia Bider, CEUR-WS.org , 2017, s. 98-105Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper is an investigation of challenges in assessing parameters of a socio-technical system. The investigation is carried out using an augmented socio-technical matrix the quadrants of which represent culture, type of structure, methods/technique and type of technology. Investigation concerns a specific kind of matrixes developed for the purpose of achieving the right level of flexibility for a business process. The paper lists the challenges that need to be addressed when assessing parameters of a socio-technical system and suggests ways of dealing with them. Conclusion includes some generalization and plans for the future.

  • 219.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. IbisSoft AB, Stockholm, Sweden.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Design science in action: developing a modeling technique for eliciting requirements on business process management (BPM) tools2015Inngår i: Software and Systems Modeling, ISSN 1619-1366, E-ISSN 1619-1374, Vol. 14, nr 3, s. 1159-1188Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Selecting a suitable business process management (BPM) tool to build a business process support system for a particular business process is difficult. There are a number of BPM tools on the market that are available as systems to install locally and as services in the cloud. These tools are based on different BPM paradigms (e.g., workflow or case management) and provide different capabilities (e.g., enforcement of the control flow, shared spaces, or a collaborative environment). This makes it difficult for an organization to select a tool that would fit the business processes at hand. The paper suggests a solution for this problem. The core of the solution is a modeling technique for business processes for eliciting their requirements for a suitable BPM tool. It produces a high-level, business process model, called a “step-relationship” model that depicts the essential characteristics of a process in a paradigm-independent way. The solution presented in this paper has been developed based on the paradigm of design science research, and the paper discusses the research project from the design science perspective. The solution has been applied in two case studies in order to demonstrate its feasibility.

  • 220.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Preparing for the era of cloud computing: Towards a framework for selecting business process support services2012Inngår i: Enterprise, Business-Process and Information Systems Modeling: 13th International Conference, BPMDS 2012, 17th International Conference, EMMSAD 2012, and 5th EuroSymposium, held at CAiSE 2012, Gdańsk, Poland, June 25-26, 2012. Proceedings, Springer Berlin/Heidelberg, 2012, s. 16-30Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The shift to the cloud computing creates new opportunities for the IT usage in business. New standard and customizable services that do not require high initial investment allow business people to choose services to support their business activities without involving technicians. Business process solutions providers are already moving their products to the cloud offering them as services. The question arises of how a business person, e.g. a department manager, can decide on which service suits best his/her needs. The paper investigates this issue in respect to the services that provide fully customizable operational support to business processes. The paper suggests a practical framework for defining requirements based on characteristics of the process to be supported by the service. The framework determines the needs of such capabilities as process flow support, shared spaces, team collaboration, etc., based on the high-level analysis of a process in question. The framework is aimed at serving as a basis for designing a practical methodology for selecting business process support services.

  • 221.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Reviving Language/Action Perspective in the Era of Social Software: Research in Progress2012Inngår i: Emerging Topics in the Practice of Enterprise Modeling: 5th IFIP WG 8.1Working Conference, PoEM 2012 / [ed] Kurt Sandkuhl, Ulf Seigerroth, Janis Stirna, 2012Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Language/Action perspective (LAP) was introduced by Flores and Winograd and their associates in the 1980th. This perspective, which is based on the speech act theory, has been originally suggested as guidelines for designing information systems. Though LAP had some success in designing commercial systems, it had never become widespread as a basis for systems design. This paper suggests reviving LAP, however, not as a tool for system design, but as a tool for analysis of communication models of systems designed on some other principles than LAP. The paper is focused on modern systems of social software type in which communication is based on the usage of shared spaces. The paper is a research in progress report that presents the main ideas, a research plan, and preliminary results achieved in its first two steps: (1) testing LAP for analysis of one system with shared spaces architecture, and (2) classification of atomic communication acts typical for business processes. The long term goal of the research is to create practical recommendations for choosing an appropriate communication model for particular business needs.

  • 222.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Towards a Business Process Modeling Technique for Agile Development of Case Management Systems2017Inngår i: Complex Systems Informatics and Modeling Quarterly, E-ISSN 2255-9922, nr 13, s. 73-113Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A modern organization needs to adapt its behavior to changes in the business environment by changing its Business Processes (BP) and corresponding Business Process Support (BPS) systems. One way of achieving such adaptability is via separation of the system code from the process description/model by applying the concept of executable process models. Furthermore, to ease introduction of changes, such process model should separate different perspectives, for example, control-flow, human resources, and data perspectives, from each other. In addition, for developing a completely new process, it should be possible to start with a reduced process model to get a BPS system quickly running, and then continue to develop it in an agile manner. This article consists of two parts, the first sets requirements on modeling techniques that could be used in the tools that supports agile development of BPs and BPS systems. The second part suggests a business process modeling technique that allows to start modeling with the data/information perspective which would be appropriate for processes supported by Case or Adaptive Case Management (CM/ACM) systems. In a model produced by this technique, called data-centric business process model, a process instance/case is defined as sequence of states in a specially designed instance database, while the process model is defined as a set of rules that set restrictions on allowed states and transitions between them. The article details the background for the project of developing the data-centric process modeling technique, presents the outline of the structure of the model, and gives formal definitions for a substantial part of the model

  • 223.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Using a Fractal Enterprise Model for Business Model Innovation2017Inngår i: RADAR+EMISA 2017 BPMDS 2017 RADAR, EMMSAD 2017 RADAR, and EMISA 2017 Workshop: Joint Proceedings / [ed] Jens Gulden, Selmin Nurcan, Iris Reinhartz-Berger, Wided Guédria, Palash Bera, Sérgio Guerreiro, Michael Fellmann, Matthias Weidlich, CEUR-WS.org , 2017, s. 20-29Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In their previous work, the authors have developed a new kind of enterprise model, called fractal enterprise model, that connects enterprise processes via assets used for running these processes. One of the possible usages of this model is facilitating innovation, more exactly, changing or extending a business model used in the enterprise. This research-in-progress paper presents the idea of how such facilitation could be arranged, and lists the problems that need to be solved in order to convert the idea into a practical methodology. The discussionis based on a hypothetical example.

  • 224.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Elias, Mturi
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Untangling the Dynamic Structure of an Enterprise by Applying a Fractal Approach to Business Processes2012Inngår i: The Practice of Enterprise Modeling: Proceedings / [ed] Kurt Sandkuhl, Ulf Seigerroth, Janis Stirna, Berlin/Heidelberg: Springer Berlin/Heidelberg, 2012, s. 61-75Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A promising approach for analyzing and designing an enterprise is to consider it as a complex adaptive system (CAS) able to self-adjust to the changes in the environment. An important part of designing a CAS model is to untangle the dynamic structure of an enterprise. This paper presents a procedure for identifying all processes that exist in an enterprise as well as their interconnections. The procedure makes use of a number of process-assets and asset-processes archetypes. The first ones help to find out what assets are needed for a particular process, the second ones help to find out supporting processes that are needed to have each type of assets ready available for deployment. The procedure is based on the ideas of fractal organization where the same pattern is repeated on different levels. The uncovered dynamic structure of an enterprise can support strategic planning, change management, as well as discovering and preventing misbalances between its business processes. The paper also presents an example of applying the procedure to research activities of a university.

  • 225.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Elias, Mturi
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Johannesson, Paul
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    A fractal enterprise model and its application for business development2017Inngår i: Software and Systems Modeling, ISSN 1619-1366, E-ISSN 1619-1374, Vol. 16, nr 3, s. 663-689Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper suggests a new type of enterprise models called fractal enterprise models (FEM), with accompanying methodological support for their design. FEM shows interconnections between the business processes in an enterprise by connecting them to the assets they use and manage. Assets considered in the model could be tangible (buildings, heavy machinery, etc.) and intangible (employees, business process definitions, etc.). A FEM model is built by using two types of patterns called archetypes: a process-assets archetype that connects a process with assets used in it, and an asset-processes archetype that connects an asset with processes aimed to manage this asset (e.g., hiring people, or servicing machinery). Alternating these patterns creates a fractal structure that makes relationships between various parts of the enterprise explicit. FEM can be used for different purposes, including finding a majority of the processes in an enterprise and planning business change or radical transformation. Besides discussing FEM and areas of its usage, the paper presents results from a completed project in order to test the practical usefulness of FEM and its related methodological support.

  • 226.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Perjons, Erik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Riaz Dar, Zakria
    Using Data-Centric Business Process Modeling for Discovering Requirements for Business Process Support Systems: Experience Report2013Inngår i: Enterprise, Business-Process and Information Systems Modeling BPMDS 2013: Proceedings / [ed] Selmin Nurcan et al., Springer Berlin/Heidelberg, 2013, s. 63-77Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Building a process model is a natural part of the requirements engineering (RE) when creating requirements for a computerized system/service to support a business process. When the process in question is workflowable (i.e. a process in which the order and the flow of tasks/ operations/activities can be predefined), there are plenty of modeling techniques, notations and tools that can help in this undertaking. These techniques, however, are of little use for discovering requirements for support of non-workflowable processes in which the information artifacts created in the process (e.g. reports, lecture slides, budget documents) are of more importance than the flow of tasks/operations/activities. Other types of techniques, notations and tools are required in this case. This paper reports on a project of using a data-centric modeling approach supported by a computerized tool in RE. The goal of the project was to test whether the approach could be useful for the task of discovering requirements on a computerized system/service supporting the process, and which and how much of requirements could be captured using it. The process used in the test is a process of course preparation in the authors’ own department. The paper reports on the environment in which the project has been conducted, results achieved, and lessons learned.

  • 227.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Rogers, David
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    YASQLT – Yet Another SQL Tutor: A Pragmatic Approach2016Inngår i: Advances in Conceptual Modeling: ER 2016 Workshops, AHA, MoBiD, MORE-BI, MReBA, QMMQ, SCME, and WM2SP, Gifu, Japan, November 14–17, 2016, Proceedings / [ed] Sebastian Link, Juan C. Trujillo, Springer, 2016, s. 197-206Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper describes an ongoing project of creating an automated assessment tool to help novice students learning SQL in a frame of an introductory database course. In difference to other tools of this kind, the project has chosen a pragmatic approach of focusing on catching common semantic errors, leaving syntax control to professional DBMS. Using agile system development, the project successfully completed two iterations, both of which were tested in practice with satisfactory results. The students appreciated the tool and would like to have similar tools for other subjects, including Relational Algebra, and Conceptual Modeling. The latter is planned for implementation in the near future. The tool is considered to be appropriate for Learning by Failure in the situation of large size classes and short courses.

  • 228.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Schmidt, Rainer
    Preface2016Inngår i: Enterprise, Business-Process and Information Systems Modeling: 17th International Conference, BPMDS 2016, 21st International Conference, EMMSAD 2016, Held at CAiSE 2016, Ljubljana, Slovenia, June 13-14,2016, Proceedings / [ed] Rainer Schmidt, Wided Guédria, Ilia Bider, Sérgio Guerreiro, 2016, s. V-VIKonferansepaper (Annet vitenskapelig)
  • 229.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Söderberg, Oscar
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Becoming Agile in a Non-disruptive Way: Is It Possible?2016Inngår i: Proceedings of the 18th International Conference on Enterprise Information Systems / [ed] Slimane Hammoudi, Leszek Maciaszek, Michele M. Missikoff, Olivier Camp, José Cordeiro, SciTePress, 2016, Vol. 1, s. 294-305Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Due to the increasing popularity of Agile Software Development (ASD), more software development teams are planning to transit to ASD. As ASD substantially differs from the traditional Software Development (TSD), there are a number of issues and challenges that needs to be overcome when transiting to ASD. One of the most difficult challenges here is acquiring an agile “mindset”. The question arises whether it is possible to acquire this mindset with the minimum disruption of an already established TSD process. The paper tries to answer this question by developing a non-disruptive method of transition to ASD, while using a knowledge transformation perspective to identify the main features of ASD mindset and how it differs from the one of TSD. To map the current mindset and plan the movement to the mindset that is more agile, the paper suggests using a process modelling technique that considers the development process as a socio-technical system with components that correspond to the pha ses of the development process. The method suggested in the paper has been designed in connection to a business case of a development team interested to transit to agility in a non-disruptive manner.

  • 230.
    Bider, Ilia
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Söderberg, Oscar
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Moving towards Agility in an Ordered Fashion2017Inngår i: Enterprise Information Systems: Revised Selected Papers / [ed] Slimane Hammoudi, Leszek A. Maciaszek, Michele M. Missikoff, Olivier Camp, José Cordeiro, Springer, 2017, s. 175-199Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper suggests a new method of transiting from Traditional Software Development (TSD) to Agile Software Development (ASD) called non-disruptive transition. The novelty of the method consists of allowing to complete the major transition steps to the agile “mindset” while remaining in the frame of an already established TSD process. The method is being developed using a knowledge transformation perspective to identify the main features of ASD mindset and how it differs from the one of TSD. More specifically, it uses a version of Nonako’s SECI model to represent software development. To analyze the current mindset and plan the movement to the mindset that is more agile, the paper suggests using a process modelling technique that considers the software development process as a complex socio-technical system. The paper also discusses external conditions that might hinder going all the way to becoming agile and require the transition to stop, and how to become agile while developing complex systems.

  • 231.
    Bigün, Elizabeth, Saers
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Statistiska institutionen.
    Bayesian risk analysis of rare events, such as catastrophes, by means of expert assessments1997Doktoravhandling, med artikler (Annet vitenskapelig)
  • 232.
    Bin, Xiao
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Self-evolvable Knowledge-enhanced IoT Data Mobility for Smart EnvironmentsArtikkel i tidsskrift (Fagfellevurdert)
  • 233.
    Bin, Xiao
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Rahim, Rahmani
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Yuhong, Li
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kanter, Theo
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Edge-based Interoperable Service-driven Information Distribution for Intelligent Pervasive ServicesInngår i: Pervasive and Mobile Computing, ISSN 1574-1192, E-ISSN 1873-1589Artikkel i tidsskrift (Fagfellevurdert)
  • 234.
    Bjelkmar, Pär
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Modeling of voltage-gated ion channels2011Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The recent determination of several crystal structures of voltage-gated ion channels has catalyzed computational efforts of studying these remarkable molecular machines that are able to conduct ions across biological membranes at extremely high rates without compromising the ion selectivity.

    Starting from the open crystal structures, we have studied the gating mechanism of these channels by molecular modeling techniques. Firstly, by applying a membrane potential, initial stages of the closing of the channel were captured, manifested in a secondary-structure change in the voltage-sensor. In a follow-up study, we found that the energetic cost of translocating this 310-helix conformation was significantly lower than in the original conformation. Thirdly, collaborators of ours identified new molecular constraints for different states along the gating pathway. We used those to build new protein models that were evaluated by simulations. All these results point to a gating mechanism where the S4 helix undergoes a secondary structure transformation during gating.

    These simulations also provide information about how the protein interacts with the surrounding membrane. In particular, we found that lipid molecules close to the protein diffuse together with it, forming a large dynamic lipid-protein cluster. This has important consequences for the understanding of protein-membrane interactions and for the theories of lateral diffusion of membrane proteins.

    Further, simulations of the simple ion channel antiamoebin were performed where different molecular models of the channel were evaluated by calculating ion conduction rates, which were compared to experimentally measured values. One of the models had a conductance consistent with the experimental data and was proposed to represent the biological active state of the channel.

    Finally, the underlying methods for simulating molecular systems were probed by implementing the CHARMM force field into the GROMACS simulation package. The implementation was verified and specific GROMACS-features were combined with CHARMM and evaluated on long timescales. The CHARMM interaction potential was found to sample relevant protein conformations indifferently of the model of solvent used.

  • 235.
    Bjerva, Johannes
    et al.
    University of Groningen.
    Grigonyte, Gintare
    Stockholms universitet, Humanistiska fakulteten, Institutionen för lingvistik, Avdelningen för datorlingvistik.
    Östling, Robert
    Stockholms universitet, Humanistiska fakulteten, Institutionen för lingvistik, Avdelningen för datorlingvistik.
    Plank, Barbara
    University of Groningen.
    Neural Networks and Spelling Features for Native Language Identification2017Inngår i: Proceedings of the 12th Workshop on Innovative Use of NLP for Building Educational Applications, Association for Computational Linguistics, 2017, s. 235-239Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present the RUG-SU team's submission at the Native Language Identification Shared Task 2017. We combine several approaches into an ensemble, based on spelling error features, a simple neural network using word representations, a deep residual network using word and character features, and a system based on a recurrent neural network. Our best system is an ensemble of neural networks, reaching an F1 score of 0.8323. Although our system is not the highest ranking one, we do outperform the baseline by far.

  • 236. Bjerva, Johannes
    et al.
    Östling, Robert
    Stockholms universitet, Humanistiska fakulteten, Institutionen för lingvistik, Avdelningen för datorlingvistik.
    Cross-lingual Learning of Semantic Textual Similarity with Multilingual Word Representations2017Inngår i: Proceedings of the 21st Nordic Conference on Computational Linguistics / [ed] Jörg Tiedemann, Linköping: Linköping University Electronic Press, 2017, s. 211-215, artikkel-id 024Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Assessing the semantic similarity between sentences in different languages is challenging. We approach this problem by leveraging multilingual distributional word representations, where similar words in different languages are close to each other. The availability of parallel data allows us to train such representations on a large amount of languages. This allows us to leverage semantic similarity data for languages for which no such data exists. We train and evaluate on five language pairs, including English, Spanish, and Arabic. We are able to train wellperforming systems for several language pairs, without any labelled data for that language pair.

  • 237.
    Björck, Fredrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Discovering Information Security Management2005Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    This thesis is concerned with issues relating to the management of information security in organisations, motivated by the need for cost-efficient information security.

    It is based on the assumption that: in order to achieve cost-efficient information security, the point of departure must be knowledge about the empirical reality in which the management of information security takes place.

    The data gathering instruments employed are questionnaires with open-ended questions and unstructured research interviews. The empirical material is analysed, and conclusions are drawn following the principles of Grounded Theory. Data sources are professionals in the area of information security management, including information security consultants (n=13), certification auditors (n=8), and information security managers (n=8).

    The main contributions are: an integrated model illustrating the experts’ perceptions concerning the objectives, actors, resources, threats, and countermeasures of information security management; a framework for the evaluation, formation, and implementation of information security management systems; a new approach for the evaluation of information security in organisations; a set of success factors concerning the formation of information security management systems; and a problem inventory concerning the value and assessment of information security education and training.

  • 238.
    Björck, Fredrik
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Henkel, Martin
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Stirna, Janis
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Zdravkovic, Jelena
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Cyber Resilience – Fundamentals for a Definition2015Inngår i: New Contributions in Information Systems and Technologies: Volume 1 / [ed] Alvaro Rocha, Ana Maria Correia, Sandor Costanzo, Luis Paulo Reis., Springer, 2015, s. 311-316Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This short paper examines the concept of cyber resilience from an organizational perspective. Cyber resilience is defined as “the ability to continuously deliver the intended outcome despite adverse cyber events”, and this definition is systematically described and justified. The fundamental building blocks of cyber resilience are identified and analyzed through the contrasting of cyber resilience against cybersecurity with regards to five central characteristics.

  • 239.
    Björkholm, Patrik
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Protein Interactions from the Molecular to the Domain Level2014Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The basic unit of life is the cell, from single-cell bacteria to the largest creatures on the planet. All cells have DNA, which contains the blueprint for proteins. This information is transported in the form of messenger RNA from the genome to ribosomes where proteins are produced. Proteins are the main functional constituents of the cell, they usually have one or several functions and are the main actors in almost all essential biological processes. Proteins are what make the cell alive. Proteins are found as solitary units or as part of large complexes. Proteins can be found in all parts of the cell, the most common place being the cytoplasm, a central space in all cells. They are also commonly found integrated into or attached to various membranes.

    Membranes define the cell architecture. Proteins integrated into the membrane have a wide number of responsibilities: they are the gatekeepers of the cell, they secrete cellular waste products, and many of them are receptors and enzymes.

    The main focus of this thesis is the study of protein interactions, from the molecular level up to the protein domain level.

    In paper I use reoccurring local protein structures to try and predict what sections of a protein interacts with another part using only sequence information. In papers II and III we use a randomization approach on a membrane protein motif that we know interacts with a sphingomyelin lipid to find other candidate proteins that interact with sphingolipids. These are then experimentally verified as sphingolipid-binding. In the last paper, paper IV, we look at how protein domain interaction networks overlap and can be evaluated.

  • 240.
    Björkholm, Patrik
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Ernst, Andreas
    Hacke, Moritz
    Wieland, Felix
    Brügger, Britta
    von Heijne, Gunnar
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för biokemi och biofysik.
    Identification of novel sphingolipid-binding motifs in mammalian membrane proteinsManuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    Specific interactions between transmembrane proteins and sphingolipids is a poorly understood phenomenon, and only a couple of instances have been identified. The best characterized example is the sphingolipid-binding motif VXXTLXXIY found in the transmembrane helix of the vesicular transport protein p24. Here, we have used a simple motif- probability algorithm (MOPRO) to identify proteins that contain putative sphingolipid-binding motifs in a dataset comprising full proteomes from mammalian organisms. Four selected candidate proteins all tested positive for sphingolipid binding in a photoaffinity assay. The putative sphingolipid-binding motifs are noticeably enriched in the 7TM family of G-protein coupled receptors, predominantly in transmembrane helix 6. 

  • 241. Björkqvist, Olof
    et al.
    Larsson, Aron
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Idefeldt, Jim
    Risk Assessment of New Pricing Strategies in the District Heating Market: A Case Study at Sundsvall Energi AB2010Inngår i: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 38, nr 5, s. 2171-2178Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The price structure of district heating has been no major scientific issue for the last decades in energy-related research. However, today trends in district heating pricing tend to move towards a more customer-oriented approach with predetermined prices under a longer periods, leading to a more complex price structure. If a district heating supplier offers district heating with predetermined prices in order to compete with similar electricity offers, the financial risk of the new price structure is significantly higher than the risk of an ordinary variable cost offer based on short-run marginal cost. In contrary to an electricity seller, the district heating company cannot transfer all of the risk of predetermined prices to the financial market, instead the company is thrown upon its own ability to handle the risk by, e.g., hedging its own energy purchase. However, all uncertainties cannot be coped with in this manner. Thus, there is a need for a methodology that can be used to estimate the financial risk of different price structures and to value different opportunities to reduce the risk. In this article, we propose a methodology, implemented in prototype software, to evaluate the risk associated with new price structures in district heating.

  • 242. Bloom, Bard
    et al.
    Field, John
    Nystrom, Nathaniel
    Oestlund, Johan
    Richards, Gregor
    Strnisa, Rok
    Vitek, Jan
    Wrigstad, Tobias
    Stockholms universitet, Humanistiska fakulteten, Institutionen för nordiska språk.
    Thorn-Robust, Concurrent, Extensible Scripting on the JVM2009Inngår i: SIGPLAN notices, ISSN 0362-1340, E-ISSN 1558-1160, Vol. 44, nr 10, s. 117-136Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Scripting languages enjoy great popularity due to their support for rapid and exploratory development. They typically have lightweight syntax, weak data privacy, dynamic typing, powerful aggregate data types, and allow execution of the completed parts of incomplete programs. The price of these features comes later in the software life cycle. Scripts are hard to evolve and compose, and often slow. An additional weakness of most scripting languages is lack of support for concurrency-though concurrency is required for scalability and interacting with remote services. This paper reports on the design and implementation of Thorn, a novel programming language targeting the JVM. Our principal contributions are a careful selection of features that support the evolution of scripts into industrial grade programs-e.g., an expressive module system, an optional type annotation facility for declarations, and support for concurrency based on message passing between lightweight, isolated processes. On the implementation side, Thorn has been designed to accommodate the evolution of the language itself through a compiler plugin mechanism and target the Java virtual machine.

  • 243.
    Blåsjö, Mona
    et al.
    Stockholms universitet, Humanistiska fakulteten, Institutionen för nordiska språk.
    Knutsson, Ola
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Cerratto-Pargman, Teresa
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Exploring the Design Space of Genre Pedagogy and Virtual Learning Environments2012Inngår i: Designs for Learning 2012: 3rd International Conference Exploring Learning Environments. Conference Proceedings, 2012, s. 75-77Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper explores the design space of genre pedagogy and virtual learning environments. This is done by examining the cornerstones of genre pedagogy and the main activities they give raise to, and how the activities are transformed when they are partly or completely moved from the classroom to virtual learning environments, and what implications for interaction design they give raise to.

  • 244. Boella, Guido
    et al.
    Noriega, Pablo
    Pigozzi, Gabriella
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Introduction to the special issue on NorMAS 20092013Inngår i: Journal of logic and computation (Print), ISSN 0955-792X, E-ISSN 1465-363X, Vol. 23, nr 2, s. 307-308Artikkel i tidsskrift (Annet vitenskapelig)
  • 245. Boella, Guido
    et al.
    Pigozzi, Gabriella
    Singh, Munindar
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Normative Multiagent Systems: Guest Editors’ Introduction2010Inngår i: Logic Journal of the IGPL, Vol. 18, nr 1, s. 1-3Artikkel i tidsskrift (Fagfellevurdert)
  • 246. Boella, Guido
    et al.
    van der Torre, Leendert
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Introduction to Normative Multiagent Systems2006Inngår i: Computational and mathematical organization theory, ISSN 1381-298X, E-ISSN 1572-9346, Vol. 12, nr 2-3, s. 71-79Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This article introduces the research issues related to and definition of normative multiagent systems. It also describes the papers selected from NorMAS05 that are part of this double special issue and relates the papers to each other.

  • 247.
    Boella, Guido
    et al.
    Universita di Torino, , Dipartimento di Informatica.
    van der Torre, Leendert
    University of Luxembourg, , Computer Science and Communication Research Unit.
    Verhagen, Harko
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Ten Challenges for Normative Multiagent Systems2008Inngår i: Programming Multi-Agent Systems, Programming Multi-Agent Systems , 2008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this paper we discuss the shift from a legal to an interactionist view on normative multiagent systems, examples, and ten new challenges in this more dynamic setting.

  • 248.
    Boeva, Veselka
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Ekenberg, Love
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    A transition logic for schemata conflicts2004Inngår i: Data & Knowledge Engineering, ISSN 0169-023X, E-ISSN 1872-6933, Vol. 51, nr 3, s. 277-294Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Conflict detection and analysis are of high importance, e.g., when integrating conceptual schemata, such as UML-Specifications, or analysing goal-fulfilment of sets of autonomous agents. In general, models for this introduce unnecessarily complicated frameworks with several disadvantages regarding semantics as well as complexity. This paper demonstrates that an important set of static and dynamic conflicts between specifications can be diagnosed using ordinary first-order modal logic. Furthermore, we show how the framework can be extended for handling situations when there are convex sets of probability measures over a state-space. Thus, representing specifications as conceptual schemata and using standard Kripke models of modal logic, augmented with an interval-valued probability measure, we propose instrumental definitions and procedures for conflict detection.

  • 249.
    Bohman, Samuel
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Civic Participation and Empowerment through Visualization2015Inngår i: Proceedings of SIGRAD 2015, June 1st and 2nd, Stockholm, Sweden / [ed] Christopher E. Peters and Lars Kjelldahl, Linköping: Linköping University Electronic Press, 2015, s. 20-23Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This article elaborates on the use of data visualization to promote civic participation and democratic engagement. The power and potential of data visualization is examined through a brief historical overview and four interconnected themes that provide new opportunities for electronic participation research: data storytelling, infographics, data physicalization, and quantified self. The goal is to call attention to this space and encourage a larger community of researchers to explore the possibilities that data visualization can bring.

  • 250.
    Bohman, Samuel
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Data Visualization: An Untapped Potential for Political Participation and Civic Engagement2015Inngår i: Electronic Government and the Information Systems Perspective: 4th International Conference, EGOVIS 2015, Valencia, Spain, September 1-3, 2015, Proceedings / [ed] Andrea Kö, Enrico Francesconi, Springer, 2015, s. 302-315Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This article elaborates on the use of data visualization to promote a more informed and engaged participation in civic and democratic life. First, it outlines the main constraints and challenges in electronic participation research and concludes that the conventional deliberative approach to political participation has been impeding civic engagement. Then, through a couple of recent examples and a brief historical overview, it examines the power of data visualization. Following this, it explores the democratization of data visualization through four interconnected themes that provide new opportunities for political participation and civic engagement research: data storytelling, infographics, data physicalisation, and the quantified self. The goal is to call attention to this space and encourage a larger community of researchers to explore the possibilities that data visualization can bring.

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