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  • 1.
    Al Mamun, Abdullah
    et al.
    Division of Software Engineering Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden.
    Berger, Christian
    Division of Software Engineering Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden.
    Hansson, Jörgen
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Explicating, Understanding and Managing Technical Debt from Self-Driving Miniature Car Projects2014In: Proceedings 2014 6th IEEE International Workshop on Managing Technical Debt: MTD 2014, Los Alamitos, CA: IEEE Computer Society, 2014, p. 11-18Conference paper (Refereed)
    Abstract [en]

    Technical debt refers to various weaknesses in the design or implementation of a system resulting from trade-offs during software development usually for a quick release. Accumulating such debt over time without reducing it can seriously hamper the reusability and maintainability of the software. The aim of this study is to understand the state of the technical debt in the development of self-driving miniature cars so that proper actions can be planned to reduce the debt to have more reusable and maintainable software. A case study on a selected feature from two self-driving miniature car development projects is performed to assess the technical debt. Additionally, an interview study is conducted involving the developers to relate the findings of the case study with the possible root causes. The result of the study indicates that "the lack of knowledge" is not the primary reason for the accumulation of technical debt from the selected code smells. The root causes are rather in factors like time pressure followed by issues related to software/hardware integration and incomplete refactoring as well as reuse of legacy, third party, or open source code.

  • 2.
    Aliahmadipour, Laia
    et al.
    Department of Applied Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Eslami, Esfandiar
    Department of Pure Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran.
    Eftekhari, Mahdi
    Department of Computer Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
    A definition for hesitant fuzzy partitions2016In: International Journal of Computational Intelligence Systems, ISSN 1875-6891, E-ISSN 1875-6883, Vol. 9, no 3, p. 497-505Article in journal (Refereed)
    Abstract [en]

    In this paper, we define hesitant fuzzy partitions (H-fuzzy partitions) to consider the results of standard fuzzy clustering family (e.g. fuzzy c-means and intuitionistic fuzzy c-means). We define a method to construct H-fuzzy partitions from a set of fuzzy clusters obtained from several executions of fuzzy clustering algorithms with various initialization of their parameters. Our purpose is to consider some local optimal solutions to find a global optimal solution also letting the user to consider various reliable membership values and cluster centers to evaluate her/his problem using different cluster validity indices.

  • 3.
    Arias Ramos, Ceferino
    University of Skövde, School of Technology and Society.
    Programming and Image Processing in a Compact Production Cell2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In recent years, control system in the automation industries has become more and more useful, covering a wide range of fields, for example, industrial instrumentation, control and monitoring systems. Vision systems are used nowadays to improve products quality control, saving costs, time, and obtaining a better accuracy than a human operator in the manufacturing process of companies. Combining a vision system with a suitable automated system allow companies to cover a wide range of products and rapid production. All these factors are considered in this project.

    The aim of this project is to upgrade the functionality of a Nokia-Cell, which was used in a quality control process for the back shells of Nokia cell phones. The project includes design, upgrade and implementation of a new system in order to make the cell work properly. The Nokia-Cell is composed of the following basic modules: vision and image recognition system, automation system devices (PC and PLC, robot), and other mechatronics devices. The new system will consist of a new camera, due to the poor connectivity and quality of the old camera. For the same reason, a new PC will replace two older ones for communication and vision recognition. The new system will also include a new PLC of Beckhoff to replace the aging one of Omron so as to facilitate the connections using the same language. In addition, IEC-61499 Function Blocks standard is adopted for programming the Nokia-Cell.

    It is expected that the results of this project will contribute to both research and education in the future. In addition, it would be correctly to apply the results to industries in vision-based quality control systems.

  • 4.
    Berg Marklund, Björn
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Backlund, Per
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Dahlin, Carl-Johan
    ius information AB, Skövde, Sweden.
    Engström, Henrik
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Wilhelmsson, Ulf
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A Game-Based Approach to Support Social Presence and Awareness in Distributed Project-Based Learning2014In: International Journal of Games Based Learning, ISSN 2155-6849, E-ISSN 2155-6857, Vol. 4, no 1, p. 1-20Article in journal (Refereed)
    Abstract [en]

    An important factor for success in project-based learning (PBL) is that the involved project groups establish an atmosphere of social interaction in their working environment. In PBL-scenarios situated in distributed environments, most of a group's work-processes are mediated through the use of production-focused tools that are unconcerned with the important informal and social aspects of a project. On the other hand, there are plenty of tools and platforms that focus on doing the opposite and mainly support informal bonding (e.g., Facebook), but these types of environments can be obtrusive and contain distractions that can be detrimental to a group's productivity and are thus often excluded from working environments. The aim of this paper is to examine how a game-based multi-user environment (MUVE) can be designed to support project-based learning by bridging the gap between productivity-focused and social software. To explore this, the authors developed a game-based MUVE which was evaluated in a PBL-scenario. The result of the study revealed several crucial design elements that are needed to make such a MUVE work effectively, and that the acceptance towards game-based MUVEs is high, even with a rudimentary execution.

  • 5.
    Bergqvist, Emil
    University of Skövde, School of Informatics.
    Auditory displays: A study in effectiveness between binaural and stereo audio to support interface navigation2014Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis analyses if the change of auditory feedback can improve the effectiveness of performance in the interaction with a non-visual system, or with a system used by individuals with visual impairment. Two prototypes were developed, one with binaural audio and the other with stereo audio. The interaction was evaluated in an experiment where 22 participants, divided into two groups, performed a number of interaction tasks. A post-interview were conducted together with the experiment. The result of the experiment displayed that there were no great difference between binaural audio and stereo regarding the speed and accuracy of the interaction. The post-interviews displayed interesting differences in the way participants visualized the virtual environment that affected the interaction. This opened up interesting questions for future studies.

  • 6.
    Bergström, Erik
    et al.
    University of Skövde, The Informatics Research Centre. University of Skövde, School of Informatics.
    Pehrsson, Helen
    University of Skövde, The Informatics Research Centre. University of Skövde, School of Informatics.
    Performance Assessments in Computer Science - An example of student perceptions2014In: Next Generation Learning Conference: Conference Summary / [ed] Erik Brunnert Walfridsson, 2014, p. 4-16Conference paper (Refereed)
  • 7.
    Bjurén, Johan
    University of Skövde, School of Informatics.
    USING CASE-BASED REASONING FOR PREDICTING ENERGY USAGE2013Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    In this study, the inability to in a future meet the electricity demand and the urge to change the consumption behavior considered. In a smart grid context there are several possible ways to do this. Means include ways to increase the consumer’s awareness, add energy storages or build smarter homes which can control the appliances. To be able to implement these, indications on how the future consumption will be could be useful. Therefore we look further into how a framework for short-term consumption predictions can be created using electricity consumption data in relation to external factors. To do this a literature study is made to see what kind of methods that are relevant and which qualities is interesting to look at in order to choose a good prediction method. Case Based Reasoning seemed to be able to be suitable method. This method was examined further and built using relational databases. After this the method was tested and evaluated using datasets and evaluation methods CV, MBE and MAPE, which have previously been used in the domain of consumption prediction. The result was compared to the results of the winning methods in the ASHRAE competition. The CBR method was expected to perform better than what it did, and still not as good as the winning methods from the ASHRAE competition. The result showed that the CBR method can be used as a predictor and has potential to make good energy consumption predictions. and there is room for improvement in future studies.

  • 8.
    Casas-Roma, Jordi
    et al.
    Faculty of Computer Science, Multimedia and Telecommunications, Internet Interdisciplinary Institute (IN3), Universitat Oberta de Catalunya, Barcelona, Spain.
    Herrera-Joancomartí, Jordi
    Department of Information and Communications Engineering, Universitat Autònoma de Barcelona, Bellaterra, Spain.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A survey of graph-modification techniques for privacy-preserving on networks2017In: Artificial Intelligence Review, ISSN 0269-2821, E-ISSN 1573-7462, Vol. 47, no 3, p. 341-366Article in journal (Refereed)
    Abstract [en]

    Recently, a huge amount of social networks have been made publicly available. In parallel, several definitions and methods have been proposed to protect users’ privacy when publicly releasing these data. Some of them were picked out from relational dataset anonymization techniques, which are riper than network anonymization techniques. In this paper we summarize privacy-preserving techniques, focusing on graph-modification methods which alter graph’s structure and release the entire anonymous network. These methods allow researchers and third-parties to apply all graph-mining processes on anonymous data, from local to global knowledge extraction.

  • 9.
    Crowston, Kevin
    et al.
    Syracuse University, Syracuse, NY, USA.
    Hammouda, ImedUniversity of Gothenburg, Sweden.Lundell, BjörnUniversity of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.Robles, GregorioGSyC, Universidad Rey Juan Carlos, Madrid, Spain.Gamalielsson, JonasUniversity of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.Lindman, JuhoChalmers, Gothenburg, Sweden / University of Gothenburg, Gothenburg, Sweden.
    Open Source Systems: Integrating Communities: 12th IFIP WG 2.13 International Conference, OSS 2016, Gothenburg, Sweden, May 30 - June 2, 2016, Proceedings2016Conference proceedings (editor) (Other academic)
    Abstract [en]

    This book constitutes the refereed proceedings of the 12th International IFIP WG 2.13 International Conference on Open Source Systems, OSS 2016, held in Gothenburg, Sweden, in May/June 2016. The 13 revised full papers presented were carefully reviewed and selected from 38 submissions. The papers cover a wide range of topics related to free, libre, and open source software, including: organizational aspects of communities; organizational adoption; participation of women; software maintenance and evolution; open standards and open data; collaboration; hybrid communities; code reviews; and certification.

  • 10.
    Dahlbom, Anders
    et al.
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Nordlund, Per-Johan
    Aeronautics, Saab AB, Linköping, Sweden.
    Detection of Hostile Aircraft Behaviors using Dynamic Bayesian Networks2013In: Proceedings of the 16th International Conference on Information Fusion, IEEE Press, 2013, p. 2033-2040Conference paper (Refereed)
    Abstract [en]

    Aircraft Combat Survivability in military air operations is concerned with survival of the own aircraft. This entails analysis of information, detection and estimation of threats, and the implementation of actions to counteract detected threats. Beyond visual range weapons can today be fired from one hundred kilometers away, making them difficult to detect and track. One approach for providing early warnings of such threats is to analyze the kinematic behavior of enemy aircraft in order to detect situations that may point to malicious intent. In this paper we investigate the use of dynamic Bayesian networks for detecting hostile aircraft behaviors.

  • 11.
    Derenius, Fredrik
    University of Skövde, School of Humanities and Informatics.
    Framställandet av en säker LiveCD för distansarbetare: Ett projekt baserat på öppen källkod2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Studien ämnar undersöka hur en LiveCD kan stödja en säkrare datormiljö för distansarbetarepå ett enkelt sätt. Distansarbetare arbetar utanför arbetsplatsens säkrare datormiljö vilket gördem till en mer utsatt grupp av datoranvändare. Många av dagens datoranvändare tyckerdessutom säkerhet relaterat till datorer och nätverk är komplicerat. Implementerad lösningtillhandahåller därför möjligheten att med hjälp av en LiveCD och ett USB-minne få tillgångtill både en säker fjärranslutning och fjärrskrivbord, genom att enbart skriva in ett lösenord.Tjänsterna konfigureras alltså automatiskt i bakgrunden; användaren behöver inte hålla redapå mer än ett lösenord. En LiveCD är också ett skrivskyddat medium vilket innebär attskadlig kod har svårt att få fäste i systemet. Resultatet är att distansarbetare med olika behovoch kunskapsnivå gällande dator- och nätverksäkerhet erbjuds möjligheten till en säkraredatormiljö på ett enkelt sätt.

  • 12.
    Einevik, Johan
    et al.
    University of Skövde, School of Engineering Science.
    Kurri, John
    University of Skövde, School of Engineering Science.
    Emulering av en produktioncell med Visionguidning: Virtuell idrifttagning2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Using a virtual twin of a production cell, makes it possible for programming and different functional testing of panels to be performed in early stages of development. A virtual twin contributes to a simpler debugging and to identify problems and minimize cost in commissioning of the production cell. The aim for the project is to investigate how well an emulated cell will perform compared to the real production cell in a factory acceptance test. Another objective is to investigate how you can use real CAD models in the emulation and what type of criteria the models should meet. The project had a lot of challenges and one of them was the difficulty to emulate the safety systems. This was solved by bypassing the safety in the PLC program. One important thing about emulation is communication between the different software used in the system. In this project, it proved successful to distribute the software on three computers to ease the workload of the programs used in the emulation. To use the emulated model instead of the real system is still in the research phase but in this project a lot of useful applications could be identified that could change commissioning in the future.

  • 13.
    Ekanayake, Hiran
    et al.
    Stockholm University, Forum 100, Kista, Sweden / University of Colombo School of Computing.
    Backlund, Per
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ziemke, Tom
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ramberg, Robert
    Stockholm University, Forum 100, Kista, Sweden.
    Hewagamage, Kamalanath P.
    University of Colombo School of Computing.
    Lebram, Mikael
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Comparing Expert and Novice Driving Behavior in a Driving Simulator2013In: Interaction Design and Architecture(s) Journal - IxD&A, ISSN 1826-9745, no 19, p. 115-131Article in journal (Refereed)
    Abstract [en]

    This paper presents a study focused on comparing driving behavior of expert and novice drivers in a mid-range driving simulator with the intention of evaluating the validity of driving simulators for driver training. For the investigation, measurements of performance, psychophysiological measurements, and self-reported user experience under different conditions of driving tracks and driving sessions were analyzed. We calculated correlations

    between quantitative and qualitative measures to enhance the reliability of the findings. The experiment was conducted involving 14 experienced drivers and 17 novice drivers. The results indicate that driving behaviors of expert and novice drivers differ from each other in several ways but it heavily depends on the characteristics of the task. Moreover, our belief is that the analytical framework proposed in this paper can be used as a tool for selecting appropriate driving tasks as well as for evaluating driving performance in driving simulators.

  • 14.
    Ekelund, Kalle
    University of Skövde, School of Humanities and Informatics.
    Q-Learning: Ett sätt att lära agenter att spela fotboll2013Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Den artificiella intelligensen i spel brukar ofta använda sig utav regelbaserade tekniker för dess beteende. Detta har gjort att de artificiella agenterna blivit förutsägbara, vilket är väldigt tydligt för sportspel. Det här arbetet har utvärderat ifall inlärningstekniken Q-learning är bättre på att spela fotboll än en regelbaserade tekniken tillståndsmaskin. För att utvärdera detta har en förenklad fotbollssimulering skapats. Där de båda lagen har använts sig av varsin teknik. De båda lagen har sedan spelat 100 matcher mot varandra för att se vilket lag/teknik som är bäst. Statistik ifrån matcherna har använts som undersökningsresultat. Resultatet visar att Q-learning är en bättre teknik då den vinner flest match och skapar flest chanser under matcherna. Diskussionen efteråt handlar om hur användbart Q-learning är i ett spelsammanhang.

  • 15.
    Eriksson, Fredrik
    University of Skövde, School of Informatics.
    Modell för lösenordsklassning: Utveckling av lösenordsklassificering2017Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    In modern society, computers are a fundamental part of our lives. For most people, the computer is a tool used in work as well as in home activities. Unfortunately, there is a darker side where people use the computer to commit crimes. The so-called IT-related crimes keep rising in numbers and according to the Swedish Brå:s report from 2016 (Andersson, Hedqvist, Ring & Skarp, 2016) the number of crimes related to it has increased with 949% in Sweden between 2006 and 2015 according to official criminal statistics.

    To arrest the criminals, evidence is needed. One way to collect the evidence is to enter the computer system to collect proof of the suspect. However, if the suspect feels he or she might be a possible target for an investigation, what might happen? It’s possible the suspect tries to make it as difficult as possible to enter the computer system. This can be done by encryption of the system and use a so-called encryption algorithm to lock down the system. This encryption might be very difficult to decrypt and it might be easier so simply trying to find the correct password instead.

    The purpose of the study is to develop a model for password classification. With this model, it may be possible to identify and to categorize strategies users use to create their passwords. This study could contribute to create a foundation to support the IT-forensics working at the police departments. With this model, different strategies users use when creating passwords could be of a certain type that the strategy could perhaps be ranged and categorized in its own category. If a classification can be made it might ease the workload for several IT-forensics and hurry up the progress decoding the password.

    The study is conducted by using a qualitative method. By conducting qualitative interviews, information is collected and analyzed. This information will then be used to develop a model for password classification. The work with developing a model for password classification has been an iterative process with collected feedback from the several interview participants. A draft model, based on the existing research was made. The draft of the model was sent out to the interview participants and this draft was discussed and then updated in an iterative process. Feedback of the updated model was collected and applied to the model. The model was then validated by applying real passwords leaked to the Internet and then test these passwords against the model of password classification.

  • 16.
    Frick, Erik
    University of Skövde, School of Informatics.
    Dynamisk grafik med WebGL och Canvas: Atlas och context-switch2015Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Att ha grafiska applikationer i webben har blivit allt mer vanligt sedan World Wide Web kom till i slutet på 80-talet. Till en början handlade det om effektfulla interaktiva element så som reklamskyltar, logotyper och menyknappar. Idag år 2015 har webbläsarna utvecklats så pass långt att inga tredjepartsprogram krävs för att interaktiv grafik ska fungera, vilket tidigare var fallet. Grafiska funktioner och bibliotek finns nu istället inbyggda i webbläsaren. De tekniker som denna rapport/arbete ska behandla är Canvas och WebGL. Dessa är tekniker som används för att presentera interaktiv grafik på webben. WebGL är ett grafiskt bibliotek som bygger på ett känt grafiskt bibliotek vid namnet OpenGL, men konstruerat för webben. Grafiken är hårdvaruaccelererad precis som OpenGL, vilket innebär att tekniken kan åstadkomma relativt kraftfull grafik för att vara en webbapplikation. För en utbildad webbutvecklare kan WebGL upplevas som en svårare värld jämfört med Canvas som ligger närmare en webbutvecklares kunskapsområde. Canvas har även en större tillgänglighet bland webbläsare än WebGL. Detta arbete ska redovisa hur dessa två tekniker förhåller sig till varandra i utritningshastighet tillsammans med en bildteknik kallad Atlas. Atlas teknik är enkelt förklarat när ett bildobjekt är som en atlas med flertal bildobjekt där i som hade kunnat motsvara separata bildobjekt. Detta examensarbete kommer jämföra alla fallen i ett experiment för att kunna ge svar på hur prestanda i utritningshastighet står sig mellan teknikerna Canvas och WebGL med eller utan Atlas teknik.

  • 17.
    Gamalielsson, Jonas
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lundell, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    On Involvement in Open Standards: How Do Organisations Contribute to W3C Standards Through Editorship?2016In: Open Source Systems: Integrating Communities: 12th IFIP WG 2.13 International Conference, OSS 2016, Gothenburg, Sweden, May 30 - June 2, 2016, Proceedings / [ed] Kevin Crowston, Imed Hammouda, Björn Lundell, Gregorio Robles, Jonas Gamalielsson, Juho Lindman, Springer, 2016, Vol. 472, p. 57-70Conference paper (Refereed)
    Abstract [en]

    Over the years, a number of open standards have been developed and implemented in software for addressing a number of challenges, such as lock-in, interoperability and longevity of software systems and associated digital artefacts. Understanding organisational involvement and collaboration in standardisation is important for informing any future policy and organisational decisions concerning involvement in standardisation. The overarching goal of the study is to establish how organisations contribute to open standards development through editorship. Specifically, the focus is on open standards development in W3C. Through an analysis of editorship for all W3C recommendations we contribute novel findings concerning organisational involvement and collaboration, and highlight contributions from different types of organisations and countries for headquarter of each organisation. We make three principal contributions. First, we establish an overall characterisation of organisational involvement in W3C standardisation. Second, we report on organisational involvement in W3C standardisation over time. Third, we establish organisational collaboration in W3C standardisation through social network analysis.

  • 18.
    Ghorbani, Ali
    et al.
    University of New Brunswick, Canada.
    Torra, VincençUniversity of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.Hişil, HüseyinYasar University, Turkey.Miri, AliRyerson University, Canada.Koltuksuz, AhmetYasar University, Turkey.Zhang, JieNanyang Technological University, Singapore.Sensoy, MuratOzyegin University, Turkey.García-Alfaro, JoaquínTélécom SudParis, France.Zincir, IbrahimYasar University, Turkey.
    2015 Thirteenth Annual Conference on Privacy, Security and Trust2015Conference proceedings (editor) (Refereed)
  • 19.
    Goienetxea Uriarte, Ainhoa
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Urenda Moris, Matías
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Oscarsson, Jan
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lean, Simulation and Optimization: A Win-Win combination2016In: Proceedings of the 2015 Winter Simulation Conference / [ed] L. Yilmaz, W. K. V. Chan, I. Moon, T. M. K. Roeder, C. Macal, and M. D. Rossetti, Piscataway, New Jersey: IEEE Computer Society, 2016, p. 2227-2238Conference paper (Refereed)
    Abstract [en]

    Lean and simulation analysis are driven by the same objective, how to better design and improve processes making the companies more competitive. The adoption of lean has been widely spread in companies from public to private sectors and simulation is nowadays becoming more and more popular. Several authors have pointed out the benefits of combining simulation and lean, however, they are still rarely used together in practice. Optimization as an additional technique to this combination is even a more powerful approach especially when designing and improving complex processes with multiple conflicting objectives. This paper presents the mutual benefits that are gained when combining lean, simulation and optimization and how they overcome each other´s limitations. A framework including the three concepts, some of the barriers for its implementation and a real-world industrial example are also described.

  • 20.
    Grünloh, Christiane
    et al.
    School of Computer Science and Communication, KTH Royal Institute of Technology, Stockholm, Sweden / Institute of Informatics, Technische Hochschule Köln, University of Applied Sciences, Gummersbach, Germany.
    Myreteg, Gunilla
    Department of Business Studies, Uppsala University, Uppsala, Sweden.
    Cajander, Åsa
    Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Rexhepi, Hanife
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    "why do they need to check me?" patient participation through ehealth and the doctor-patient relationship: Qualitative study2018In: Journal of Medical Internet Research, ISSN 1438-8871, E-ISSN 1438-8871, Vol. 20, no 1, article id e11Article in journal (Refereed)
    Abstract [en]

    Background: Roles in the doctor-patient relationship are changing and patient participation in health care is increasingly emphasized. Electronic health (eHealth) services such as patient accessible electronic health records (PAEHRs) have been implemented to support patient participation. Little is known about practical use of PAEHR and its effect on roles of doctors and patients. Objective: This qualitative study aimed to investigate how physicians view the idea of patient participation, in particular in relation to the PAEHR system. Hereby, the paper aims to contribute to a deeper understanding of physicians' constructions of PAEHR, roles in the doctor-patient relationship, and levels and limits of involvement. Methods: A total of 12 semistructured interviews were conducted with physicians in different fields. Interviews were transcribed, translated, and a theoretically informed thematic analysis was performed. Results: Two important aspects were identified that are related to the doctor-patient relationship: roles and involvement. The physicians viewed their role as being the ones to take on the responsibility, determining treatment options, and to be someone who should be trusted. In relation to the patient's role, lack of skills (technical or regarding medical jargon), motives to read, and patients' characteristics were aspects identified in the interviews. Patients were often referred to as static entities disregarding their potential to develop skills and knowledge over time. Involvement captures aspects that support or hinder patients to take an active role in their care. Conclusions: Literature of at least two decades suggests an overall agreement that the paternalistic approach in health care is inappropriate, and a collaborative process with patients should be adopted. Although the physicians in this study stated that they, in principle, were in favor of patient participation, the analysis found little support in their descriptions of their daily practice that participation is actualized. As seen from the results, paternalistic practices are still present, even if professionals might not be aware of this. This can create a conflict between patients who strive to become more informed and their questions being interpreted as signs of critique and mistrust toward the physician. We thus believe that the full potential of PAEHRs is not reached yet and argue that the concept of patient empowerment is problematic as it triggers an interpretation of "power" in health care as a zero-sum, which is not helpful for the maintenance of the relationship between the actors. Patient involvement is often discussed merely in relation to decision making; however, this study emphasizes the need to include also sensemaking and learning activities. This would provide an alternative understanding of patients asking questions, not in terms of "monitoring the doctor" but to make sense of the situation.

  • 21.
    Hallin, Jonas
    University of Skövde, School of Informatics.
    Svärm-AI i shooters2015Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Svärm-AI är en variant av artificiell intelligens (AI) som används för att simulera ett bettende liknande det man kan se i svärmar, flockar eller stim. Syftet med detta arbete är att undersöka ifall man kan använda svärm-AI för att förbättra en AI i ett top down shooter spel där två lag slåss mot varandra. Ett program skapades för att testa detta där de två lagen båda var datorstyrda enheter och fick slåss mot varandra för att samla mätvärden. Resultaten visar att svärm-AI presterade bättre i labyrintliknande banor utan stora tomma områden. De visade även att svärm-AI använde betydligt mycket mer prestanda.

  • 22.
    Heljegård, Filip
    University of Skövde, School of Informatics.
    HTML5 Canvas object rendering: Rendering av olika objekt i olika webbläsare2015Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Denna rapport tar upp tester av renderingstider av olika Canvas objekt. Objeken är unika från varandra och pressar olika webbläsare för att ta reda på information om renderingsmotorn i webbläsaren.

  • 23.
    Hernández Rentería, Luis Alejandro
    University of Skövde, School of Informatics.
    Gamified layer for Google Classroom to improve the user experience and engagement of students with ADHD2017Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    The implementation of a Course Management System into an educational institution oriented to students with learning disabilities such as ADHD,  represents a big challenge since these students experience persistent impairments in attention (or concentration) that impact negatively on their learning outcomes, engagement and motivation. It’s crucial to adapt and enhance these environments having in consideration the students’ special learning needs, in order to improve their user experience and engagement during their learning process. This thesis address the design and development of gamified layer that brings a current analog gamification practice into a Course Management System Environment, Google Classroom (GC). The prototype developed retrieves, transforms and shows the GC data in form of game elements such as points, badges, and progress bars, among others. After using the prototype during three weeks, the students showed an easy familiarization with the gamified layer of GC and an active participation and persistence during their course activities.

  • 24.
    Hesselbom, Anton
    University of Skövde, School of Informatics.
    Neuroevolution med tävlingsinriktad samevolution i flera miljöer med ökande komplexitet2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    NEAT är en neuroevolutionsteknik som kan användas för att träna upp AI-kontrollerade robotar utan att behöva tillföra någon mänsklig expertis eller tidigare kunskap till systemet. Detta arbete undersöker hur väl denna teknik fungerar tillsammans med samevolution för att utveckla robotar i en tävlingsmiljö, med fokus på att testa tekniken på flera olika nivåer med varierande mängd komplexitet i form av väggar och hinder.

    Tekniken utvärderas genom att låta robotarna tävla mot varandra, deras kompetens mäts sedan från resultaten av dessa tävlingar. Exempelvis deras förmåga att vinna matcher.

    Resultaten visar att tekniken fungerade bra på nivån med låg komplexitet, men att robotarna har vissa svårigheter att lära sig kompetenta strategier på nivåerna med högre komplexitet. Tekniken har dock potential för flera olika varianter och förbättringar som potentiellt kan förbättra resultatet även på de mer komplexa nivåerna.

  • 25.
    Istanbullu, Alexander
    University of Skövde, School of Humanities and Informatics.
    Prestandajämförelse av textbaserade och binära dataformat för AJAX2013Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Introduktionen av AJAX har möjliggjort skapandet av dynamiska webbapplikationer på Internet. Dessa dynamiska webbapplikationer bygger på att skicka data mellan klient och server med hjälp av asynkrona förfrågningar. Detta görs med hjälp av ett serialiseringsformat som används för att kompaktera data och möjliggöra kommunikation mellan olika programmeringsspråk. Binära serialiseringsformat har konsistent visat sig prestera bättre än de textbaserade alternativen på plattformar som tillåter binär transport av data. AJAX är en plattform som endast tillåter textbaserad transport av data. Detta arbete syftar till att jämföra prestandan av textbaserade och binära serialiseringsformat för AJAX med hjälp av bland annat round-trip time. Arbetet har utförts genom att skapa en webbapplikation som utför prestandamätningar med hjälp av olika datamängder med varierande storlek och innehåll. Resultaten visar att binära serialiseringsformat endast skulle kunna vara ett tänkbart alternativ när det rör sig om webbapplikationer som skickar mycket sifferdominant data.

  • 26.
    Jeusfeld, Manfred
    Tillburg University, Netherlands.
    Metamodeling and method engineering with ConceptBase2009In: Metamodeling for Method Engineering / [ed] Manfred Jeusfeld, Matthias Jarke, John Mylopoulos, Cambridge, Massachusetts, USA: MIT Press, 2009Chapter in book (Other academic)
    Abstract [en]

    This chapter provides a practical guide on how to use the meta datarepository ConceptBase to design information modeling methods by using meta-modeling. After motivating the abstraction principles behind meta-modeling, thelanguage Telos as realized in ConceptBase is presented. First, a standard factualrepresentation of statements at any IRDS abstraction level is defined. Then, thefoundation of Telos as a logical theory is elaborated yielding simple fixpointsemantics. The principles for object naming, instantiation, attribution, andspecialization are reflected by roughly 30 logical axioms. After the languageaxiomatization, user-defined rules, constraints and queries are introduced. The firstpart is concluded by a description of active rules that allows the specification ofreactions of ConceptBase to external events. The second part applies the languagefeatures of the first part to a full-fledged information modeling method: The Yourdanmethod for Modern Structured Analysis. The notations of the Yourdan method aredesigned along the IRDS framework. Intra-notational and inter-notational constraintsare mapped to queries. The development life cycle is encoded as a software processmodel closely related to the modeling notations. Finally, aspects managing themodeling activities are addressed by metric definitions.

  • 27.
    Jeusfeld, Manfred
    et al.
    University of Skövde, School of Informatics.
    Delcambre, Lois
    Ling, Tok Wang
    Preface: Special Section featuring extended papers from the 30th International Conference on Conceptual Modeling (ER-2011)2013In: Data & Knowledge Engineering, ISSN 0169-023X, E-ISSN 1872-6933, Vol. 87, p. 259-Article in journal (Other (popular science, discussion, etc.))
    Abstract [en]

    The 30th International Conference on Conceptual Modeling (ER-2011) highlighted the strong and persistent interest in research on conceptual modeling for developing information systems. Topics included data modeling theory, goal modeling, socio-technical factors, requirements engineering, process modeling, and ontologies.

  • 28.
    Johansson, David
    University of Skövde, School of Informatics.
    Applicability analysis of computation double entendre humor recognition with machine learning methods2016Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
  • 29.
    Karlsson, Ingemar
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Bernedixen, Jacob
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Pehrsson, Leif
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Combining augmented reality and simulation-based optimization for decision support in manufacturing2018In: Proceedings of the 2017 Winter Simulation Conference / [ed] W. K. V. Chan, A. D’Ambrogio, G. Zacharewicz, N. Mustafee, G. Wainer, and E. Page, Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 3988-3999Conference paper (Refereed)
    Abstract [en]

    Although the idea of using Augmented Reality and simulation within manufacturing is not a new one, the improvement of hardware enhances the emergence of new areas. For manufacturing organizations, simulation is an important tool used to analyze and understand their manufacturing systems; however, simulation models can be complex. Nonetheless, using Augmented Reality to display the simulation results and analysis can increase the understanding of the model and the modeled system. This paper introduces a decision support system, IDSS-AR, which uses simulation and Augmented Reality to show a simulation model in 3D. The decision support system uses Microsoft HoloLens, which is a head-worn hardware for Augmented Reality. A prototype of IDSS-AR has been evaluated with a simulation model depicting a real manufacturing system on which a bottleneck detection method has been applied. The bottleneck information is shown on the simulation model, increasing the possibility of realizing interactions between the bottlenecks. 

  • 30.
    Karlsson, Johanna
    University of Skövde, School of Informatics.
    Sensorteknik som hjälpmedel inom vård och omsorg?: En kvalitativ datavetenskaplig studie kring risker och möjligheter med sensorteknik som hjälpmedel inom vård och omsorg2015Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna studie är att kartlägga eventuella risker och möjligheter med sensorteknik som hjälpmedel inom vård och omsorg. Studien använder en kvalitativ metod med kvantitativa inslag där semistrukturerade intervjuer tillsammans med frågeformulär utnyttjades. Åtta personer med olika eventuella relationer till sensortekniken intervjuades och resultatet har visat på att både risker och möjligheter kan ses.

    Studien visar att vad respondenterna kan anse användbart att sensortekniken utför eller hjälper till med, inte nödvändigtvis ses som acceptabelt. Den visar även på att personal och ledning inom vård och omsorg inte alltid är överens om t.ex. hur mycket utbildning av personalen som behövs vid införande av ny teknik eller hur kvalitén på utbildningen är. De gemensamma åsikter som framkom var hur viktig och betydelserik teknik som t.ex. sensortekniken kommer bli för den framtida vård och omsorg för att kommunerna ska kunna tillgodose det ökade behovet.

     

    Studien bidrar till en djupare förståelse för attityder gentemot sensortekniken och kan vara som en vägledning för kommuner vid införandet av liknande tekniker i framtiden. Genom att lyfta fram de olika rollernas eventuella tankar och idéer om sensortekniken kan det användas som en form av kravanalys, sett utifrån ett operativt perspektiv till fördel för framtida forskning i ämnet. Det kan också underlätta för kommuner, genom att peka ut vart och hur rädslor och negativitet gentemot tekniken kan finnas, för att kunna förebygga med hjälp av ytterligare information till personal, användare och anhöriga.

  • 31.
    Katz, Andrew
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Moorcrofts LLP Solicitors, Buckinghamshire, United Kingdom.
    Lundell, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Gamalielsson, Jonas
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Software, copyright and the learning environment: An analysis of the IT contracts Swedish schools impose on their students and the implications for FOSS2016In: International Free and Open Source Software Law Review, ISSN 1877-6922, Vol. 8, no 1, p. 1-28Article in journal (Refereed)
    Abstract [en]

    Free and open source software (FOSS) is commonly made available to students in schools, but the schools do not necessarily take a holistic approach to their provision of IT (including software) which takes into account the nature of FOSS. In particular, we have identified a number of contracts with which Swedish students who are provided with laptops by their schools are required to comply which set out conditions for the use of the laptops, and associated software and content. Many clauses in these contracts are legally incompatible with certain FOSS licences, or contain misconceptions about FOSS, licensing and culture. This paper explores the relationship between the contracts and FOSS licensing and culture, and suggests a number of resolutions to the contradictions and misconceptions, as well as considering related issues.

  • 32.
    Kauküla, Marcus
    University of Skövde, School of Informatics.
    Analysing Performance Effects of Deduplication on Virtual Machine Storage2017Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Virtualization is a widely used technology for running multiple operating systems on a single set of hardware. Virtual machines running the same operating system have been shown to have a large amount of identical data, in such cases deduplication have been shown to be very effective in eliminating duplicated data.

    This study aimed to investigate if the storage savings are as large as shown in previous research, as well as to investigate if there are any negative performance impacts when using deduplication. The selected performance variables are resource utilisation and disk performance.

    The selected deduplication implementations are SDFS and ZFS deduplication. Each file system is tested with its respective non-deduplicated file systems, ext4 and ZFS.

    The results show that the storage savings are between 72,5 % and 73,65 % while the resource utilisation is generally higher when using deduplication. The results also show that deduplication using SDFS has an overall large negative disk performance impact, while ZFS deduplication has a general disk performance increase.

  • 33.
    Knutsson, Viktor
    University of Skövde, School of Humanities and Informatics.
    Nätverksövervakning av industriella miljöer: En lösning med öppen källkod2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna uppsats undersöker möjligheten att använda ett nätverksövervakningssystem för att även övervaka maskindrivna processer. Kan man baka ihop övervakningen av den maskinella processen och datorn som styr maskinen i ett och samma system? Detta genomförs genom att identifiera och implementera ett lämpligt övervakningssystem i en befintlig maskinell laborationsmiljö. Arbetet utvärderas därefter enligt ett antal felscenarion och även utifrån ett systemadministratörsperspektiv. Intervjuer med praktiker inom industribranchen utförs också för att dra ytterligare slutsatser.

  • 34.
    Liebel, Grischa
    et al.
    Software Engineering Division, Chalmers / University of Gothenburg, Sweden.
    Marko, Nadja
    Virtual Vehicle Research Center, Graz, Austria.
    Tichy, Matthias
    Software Engineering Division, Chalmers / University of Gothenburg, Sweden.
    Leitner, Andrea
    Virtual Vehicle Research Center, Graz, Austria.
    Hansson, Jörgen
    University of Skövde, School of Informatics.
    Assessing the state-of-practice of model-based engineering in the embedded systems domain2014In: Model-Driven Engineering Languages and Systems: 17th International Conference, MODELS 2014, Valencia, Spain, September 28 – October 3, 2014. Proceedings / [ed] Juergen Dingel, Wolfram Schulte, Isidro Ramos, Silvia Abrahão, Emilio Insfran, Springer, 2014, p. 166-182Conference paper (Refereed)
    Abstract [en]

    Abstract Model-Based Engineering (MBE) aims at increasing the effectiveness of engineering by using models as key artifacts in the development process. While empirical studies on the use and the effects of MBE in industry exist, there is only little work targeting the embedded systems domain. We contribute to the body of knowledge with a study on the use and the assessment of MBE in that particular domain. We collected quantitative data from 112 subjects, mostly professionals working with MBE, with the goal to assess the ...

  • 35.
    Lundell, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    E-Governance in Public Sector ICT Procurement: What is Shaping Practice in Sweden?2014In: Research On Open Innovation: A collection of papers on Open Innovation from leading researchers in the field / [ed] Shane Coughlan, OpenForum Europe Limited , 2014, 1, p. 103-128Chapter in book (Refereed)
    Abstract [en]

    Is it reasonable to require any person or organisation to purchase specific software in order to be able to communicate with a governmental organisation? This question is at the heart of an ongoing debate in many countries within the EU, because of its implications for accessibility, transparency, democracy, and fairness in procurement and markets. In this paper we consider theinability of many Swedish governmental organisations to communicate in open formats, and report on an investigation into policy formulation which has led to this situation in one sector – local government. We conducted a survey of all municipalities in Sweden. The final response rate was 99%, after 4 months and a maximum of 7 reminders. We find that there is little or no evidence ofconsideration given to document formats when procuring software. And in a large majority of cases, there is no documentation of any decision process. Further, organisational adoption of application suites seems more influenced by tradition and a desire to upgrade existing IT infrastructure than by any form of analysis and evaluation prior to purchase. In several municipalities specific applications are even named in procurements, which is in conflict with EU directives. There is also considerable confusion amongst respondents related to the difference between application and file format. We make a number of recommendations. Evaluation of document formats should always precede decisions on application and should include interoperability and lock-in considerations. Municipalities must take responsibility for the evaluation of both document formats and office applications before adoption. Further, when assessing the total cost of ownership the analysis should include consideration of exit costs in the procurement. The study highlights a lack of strategic decision making with respect to accessibility, and a resultant lack of transparency with respect to ICTprocurement.

  • 36.
    Lundell, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Rapport från öppet seminarium om öppna standarder i Riksdagen2015Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Denna rapport presenterar en sammanfattning av frågor och diskussion från ett öppet seminarium om öppna standarder som genomförts i Sveriges Riksdag den 18 mars 2015. Seminariet genomfördes utifrån ett småföretagsperspektiv och fokuserade på hur öppna standarder kan bidra till innovations- och konkurrenkraft. Resultat från forskningsprojektet ORIOS presenterades och diskuterades utifrån flera perspektiv och erfarenheter. Frågor om statens möjligheter att styra och stimulera utvecklingen diskuterades. Internationella erfarenheter diskuterades och exempelvis lyfte flera deltagare fram Storbritanniens arbete med öppna standarder som ett intressant exempel att inspireras av för Sverige.

  • 37.
    Lundell, Björn
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Gamalielsson, Jonas
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Grahn, Alexander
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Feist, Jonas
    RedBridge AB.
    Gustavsson, Tomas
    PrimeKey Solutions AB.
    Strindberg, Henrik
    Findwise AB.
    On influences between software standards and their implementations in open source projects: Experiences from RDFa and its implementation in Drupal2014In: OpenSym '14: Proceedings of The International Symposium on Open Collaboration, New York: ACM Digital Library, 2014, p. 3:1-3:10Conference paper (Refereed)
    Abstract [en]

    It is widely acknowledged that standards implemented in open source software can reduce the risk for lock-in, improve interoperability, and promote competition on the market. However, there is limited knowledge concerning the relationship between standards and their implementations in open sourcesoftware. This paper reports from an investigation of influences between software standards and open source softwareimplementations of software standards. The study focuses on the RDFa standard and its implementation in the Drupal project. Specifically, issues in the W3C issue trackers for RDFa and theDrupal issue tracker for RDFa have been analysed. Findings show that there is clear evidence ofreciprocal action between RDFa and its implementation in Drupal. The study contributes novel insights concerning effective processes for development and long-term maintenance of software standards and their implementations in open source projects.

  • 38.
    Lundell, Björn
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Gamalielsson, Jonas
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Katz, Andrew
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Moorcrofts LLP.
    On implementation of Open Standards in software: To what extent can ISO standards be implemented in open source software?2015In: International Journal of Standardization Research, ISSN 2470-8542, Vol. 13, no 1, p. 47-73Article in journal (Refereed)
    Abstract [en]

    Several European countries, as well as the European Commission, have acknowledged the importance of open standards (under various definitions of that term) and have taken steps accordingly. Formal (e.g. ISO) standards are often referred to in software development and procurement, but may not necessarily also be open standards. The authors consider the application of formal standards where national policy promotes their use, and, since much contemporary software development involves open source software, they further consider the interaction between the requirement to comply with open standards, and the implementation of open and formal standards in open source software, with particular reference to patent licensing. It is shown that not all formal standards are open standards. SSO policies and procedures regarding the notification of standards-essential patents (SEPs) present challenges for organisations wishing to implement standards in software since such policies and procedures need to be compliant with procurement requirements, patent licences and open source software licences. This paper draws out some implications for those organisations (differentiating where appropriate between small companies and other organisations) and suggests a number of ways of addressing the challenges identified. Use of formal standards may create barriers for implementation in open source software and inhibit an open and inclusive business-friendly ecosystem, and to avoid such barriers is of particular importance for small companies that are essential players in an innovative and international society.

  • 39. Narukawa, Yasuo
    et al.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    New results on hesitant fuzzy sets: score functions2015In: The 12th International Conference on Modeling Decisions for Artificial Intelligence: CD-ROM Proceedings, MDAI - HiS , 2015Conference paper (Refereed)
  • 40.
    Ng, Amos H. C.
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Shaaban, Sabry
    Department of Strategy, ESC La Rochelle, La Rochelle, France.
    Bernedixen, Jacob
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Studying unbalanced workload and buffer allocation of production systems using multi-objective optimisation2017In: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 55, no 24, p. 7435-7451Article in journal (Refereed)
    Abstract [en]

    Numerous studies have investigated the effects of unbalanced service times and inter-station buffer sizes on the efficiency of discrete part, unpaced production lines. There are two main disadvantages of many of these studies: (1) only some predetermined degree of imbalance and patterns of imbalance have been evaluated against the perfectly balanced configuration, making it hard to form a general conclusion on these factors; (2) only a single objective has been set as the target, which neglects the fact that different patterns of imbalance may outperform with respect to different performance measures. Therefore, the aim of this study is to introduce a new approach to investigate the performance of unpaced production lines by using multiple-objective optimisation. It has been found by equipping multi-objective optimisation with an efficient, equality constraints handling technique, both the optimal pattern and degree of imbalance, as well as the optimal relationship among these factors and the performance measures of a production system can be sought and analysed with some single optimisation runs. The results have illustrated that some very interesting relationships among the key performance measures studied, including system throughput, work-in-process and average buffer level, could only be observed within a truly multi-objective optimisation context. While these results may not be generalised to apply to any production lines, the genericity of the proposed simulation-based approach is believed to be applicable to study any real-world, complex production lines.

  • 41.
    Olson, Maria
    et al.
    University of Skövde, School of Health and Education. University of Skövde, Health and Education. Stockholm University.
    Gamalielsson, Jonas
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Gustavsson, Susanne
    University of Skövde, School of Health and Education. University of Skövde, Health and Education.
    Lundell, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Addressing Democratic and Didactic Implications of Different Technological Offerings in Compulsory School Teaching Practices2014In: Next Generation Learning Conference: Conference Summary / [ed] Erik Brunnert Walfridsson, Högskolan Dalarna, 2014, p. 52-62Conference paper (Refereed)
    Abstract [en]

    This paper draws from a multidisciplinary research study that aims to identify and analyse democratic and didactic implications of different technological offerings in compulsory school teaching practices. The research study also aims to develop strategies to promote learning through open knowledge processes in Swedish educational contexts. The overarching goal of our research is to contribute to systematic and in-depth knowledge of specific, education-related challenges in one of today’s most important ongoing changes in schools, the implementation of IT. In this paper we report on the current state of practice concerning the use of technological offerings in school and its democratic and didactic implications to the aim of elaborating on pedagogical and technological challenges in the context of compulsory school.

  • 42.
    Pethrus, Anton
    University of Skövde, School of Informatics.
    Informationens effekt i moraliska dilemman: Effekterna mängden tillgänglig information har på spelares beslut i prohibition dilemman2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete redogör för effekterna tillgången eller avsaknaden av omfattande karaktärsinformation samt information om beslutens direkta konsekvenser har på spelarens beslutsprocess i narrativa prohibition dilemman. Då det finns avsaknad av konsensus om dess effekter i ämnesområdet och en frånvaro av objektiva studier för att undersöka de aktuella ståndpunkterna, är studien nödvändig för att förbättra kunskapen inom området och för att generera objektiva resultat av dess effekter på spelare. För att undersöka problemformuleringen skapades två likadana textbaserade spel, där skillnaden mellan dem var att den ena gav spelaren omfattande karaktärsinformation och information om beslutens direkta konsekvenser i spelet narrativa prohibition dilemman, medan den andra artefakten saknade den informationen. Respektive artefakt testades på en separat testgrupp för att generera resultat om dess respektive effekt på testgruppen som spelade den. Resultaten var blandade i de olika testgrupperna. Det gick dock att finna tendenser i resultaten i de olika grupperna. När spelare inte hade omfattande karaktärsinformation samt information om beslutens konsekvenser, var de mer benägna att välja de beslut de kände var rätt utifrån deras egna värderingar när de inte kunde härleda beslutens konsekvenser. När de kunde härleda beslutens konsekvenser valde de ofta det val vilket gav dem den mest fördelaktiga utkomsten. När spelaren hade tillgång omfattande karaktärsinformation samt information om beslutens direkta konsekvenser motiverades deras beslut av att väga fördelarna och nackdelarna av respektive beslutsalternativ mot varandra, utifrån en strategisk och/eller moralisk basis, där de tog det alternativ som gav dem den mest optimala utkomsten. I fall där spelarna hade en emotionell investering i besluten valde de oftast oavsett mängden tillgänglig information vid beslutet att välja det beslut som kändes rätt. Något som även framkom i studien var att bättre resultat för att besvara problemformuleringen och explorativt undersöka ämnesområdet, skulle vara att göra ett liknande test av artefakterna på grupper av definierade spelartyper. Det skulle ge en bättre översikt av respektive utgångspunkts påverkan på specifika spelartyper och generera tydligare samt mer användbara resultat att besvara problemformuleringen med.   

  • 43.
    Pozzer, Cesar
    et al.
    University of Skövde, The Informatics Research Centre. University of Skövde, School of Informatics.
    Amorim, Joni
    Universidade Estadual de Campinas - UNICAMP Cidade Universitária "Zeferino Vaz", 13.083-970 Campinas, Brazil.
    Gustavsson, Per M.
    Combitech/Saab, Sweden.
    Mellin, Jonas
    University of Skövde, The Informatics Research Centre. University of Skövde, School of Informatics.
    Heldal, Ilona
    University of Skövde, The Informatics Research Centre. University of Skövde, School of Informatics.
    Azevedo, Anibal T.
    Universidade Estadual de Campinas - UNICAMP Cidade Universitária "Zeferino Vaz" - 13.083-970 Campinas, Brazil.
    Imprecise Computation as an Enabler for Complex and Time Critical HLA Simulation Networks2014In: Proceedings of Simulation Interoperability Workshop, 2014, p. 171-179Conference paper (Refereed)
    Abstract [en]

    A trend over the past years is that simulation systems for training are being connected in simulationnetworks, allowing the interaction of teams spread in distributed sites. By combining interconnected simulation systemsthe simulation complexity increases and may affect time-critical simulation tasks in a negative way. As a consequence,the training simulation objectives may not be met. The same problem may occur when performing, for example, missionrehearsal on site, since available computation resources are usually very limited in this scenario, or for a joint firesscenario, where the large and complex functional chain (including intelligence, C2, forward observer, pilots, etc.) mayoverload existing resources. In this work, the technique of imprecise computation in real-time systems (ICRS) topreserve time-critical simulation tasks is presented. The ICRS technique allows time-critical tasks to produce quickersolutions for approximate results and saves computational resources. This paper discusses the main advantages of theICRS technique by a review of the commonly used optimization concepts built upon imprecise computation field. Thepaper ends with presenting a work-in-progress: an architectural solution for aligning ICRS with the High LevelArchitecture (HLA), standardized as the IEEE 1516-series.

  • 44.
    Rinaldo, Pontus
    University of Skövde, School of Informatics.
    Samband mellan kritiska framgångsfaktorer och krav på dokumenthantering2016Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    This report is investigating the relation between critical success factors and requirements on document management. The purpose to know that is if a critical success factors are met by a requirement, the chances to succeed increase and in the long runt hat can save both time and money.

    Initially a literature research will be conducted to sort out the critical success factors, thereafter a case study will collect the requirements from a business in the constructing sector and finally a comparison between these results will be conducted of the author.

    The results show that there is a relation between certain factors and certain requirements. Some requirements even fulfil more than one factor and vice versa. For example: the requirement ”Well defined engineering discipline” fulfils ”Defined storage routine”, ”User involvement”, ”Trust to the system” and ”Training and education of users”.

    Keywords: Relations, Requirements, Critical success factors, Document Management.

  • 45.
    Rodríguez, R. M.
    et al.
    Department of Computer Science and Artificial Intelligence, University of Granada, Granada, Spain.
    Bedregal, B.
    Department of Informatics and Applied Mathematics, Federal University of Rio Grande do Norte, Natal, Brazil.
    Bustince, H.
    Department of Automatic and Computation and Institute of Smart Cities, Public University of Navarra, Pamplona, Spain.
    Dong, Y. C.
    Business School, Sichuan University, Chengdu, China.
    Farhadinia, B.
    Department of Mathematics, Quchan University of Advanced Technology, Iran.
    Kahraman, C.
    Department of Industrial Engineering, Istanbul Technical University, Istanbul, Turkey.
    Martínez, L.
    Department of Computer Science, University of Jaén, Jaén, Spain.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Xu, Y. J.
    Business School, Hohai University, Nanjing, China.
    Xu, Z. S.
    Business School, Sichuan University, Chengdu, China.
    Herrera, F.
    Department of Computer Science and Artificial Intelligence, University of Granada, Granada, Spain / Faculty of Computing and Information Technology, King Abdulaziz University, North Jeddah, Saudi Arabia.
    A Position and Perspective Analysis of Hesitant Fuzzy Sets on Information Fusion in Decision Making: Towards High Quality Progress2016In: Information Fusion, ISSN 1566-2535, E-ISSN 1872-6305, Vol. 29, p. 89-97Article in journal (Refereed)
    Abstract [en]

    The necessity of dealing with uncertainty in real world problems has been a long-term research challenge which has originated different methodologies and theories. Recently, the concept of Hesitant Fuzzy Sets (HFSs) has been introduced to model the uncertainty that often appears when it is necessary to establish the membership degree of an element and there are some possible values that make to hesitate about which one would be the right one. Many researchers have paid attention on this concept who have proposed diverse extensions, relationships with other types of fuzzy sets, different types of operators to compute with this type of information, applications on information fusion and decision-making, etc.

    Nevertheless, some of these proposals are questionable, because they are straightforward extensions of previous works or they do not use the concept of HFSs in a suitable way. Therefore, this position paper studies the necessity of HFSs and provides a discussion about current proposals including a guideline that the proposals should follow and some challenges of HFSs.

  • 46.
    Salas, Julián
    et al.
    IIIA-CSIC, Consejo Superior de Investigaciones Científicas, Institut d’Investigació en Intelligència Artificial, Campus Universitat Autònoma de Barcelona, Spain.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. IIIA-CSIC, Consejo Superior de Investigaciones Científicas, Institut d’Investigació en Intelligència Artificial, Campus Universitat Autònoma de Barcelona, Spain.
    Graphic sequences, distances and k-degree anonymity2015In: Discrete Applied Mathematics, ISSN 0166-218X, E-ISSN 1872-6771, Vol. 188, no 1, p. 25-31Article in journal (Refereed)
    Abstract [en]

    In this paper we study conditions to approximate a given graph by a regular one. We obtain optimal conditions for a few metrics such as the edge rotation distance for graphs, the rectilinear and the Euclidean distance over degree sequences. Then, we require the approximation to have at least kk copies of each value in the degree sequence, this is a property proceeding from data privacy that is called kk-degree anonymity.

    We give a sufficient condition in order for a degree sequence to be graphic that depends only on its length and its maximum and minimum degrees. Using this condition we give an optimal solution of kk-degree anonymity for the Euclidean distance when the sum of the degrees in the anonymized degree sequence is even. We present algorithms that may be used for obtaining all the mentioned anonymizations.

  • 47.
    Sandqvist, Peter
    University of Skövde, School of Humanities and Informatics.
    Övervakningsverktyg: En jämförelse mellan Zabbix och op5 Monitor2011Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta examensarbete jämför två övervakningsverktyg för servrar i ett nätverk, Zabbix och op5 Monitor. Båda är open source och används aktivt av organisationer för att övervaka organisationsservrarnas processorlast, I/O-kö på hårddiskarna, status på tjänster och mycket mer. Dessa två övervakningsverktyg testas och jämförs med varandra ur perspektiven användarvänlighet, funktionalitet och prestanda. Resultaten visar att i de flesta fallen är Zabbix mer användarvänligt medan op5 Monitor i de flesta fallen har bättre funktionalitet. Det visar sig också att op5 Monitor har något högre prestanda än inte bara Zabbix utan även de övervakningssystem som testades av Robin Rudeklint år 2010.

  • 48.
    Staron, Mirolaw
    et al.
    University of Gothenburg.
    Hansson, JörgenUniversity of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.Bosch, JanChalmers University of Technology.
    Performance in software development – Special issue editorial2014Collection (editor) (Other academic)
  • 49.
    Staron, Miroslaw
    et al.
    University of Gothenburg.
    Hansson, Jörgen
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Bosch, Jan
    Chalmers University of Technology.
    Performance in software development – Special issue editorial2014In: Information and Software Technology, ISSN 0950-5849, E-ISSN 1873-6025, Vol. 56, no 5, p. 463-464p. 463-464Article in journal (Refereed)
  • 50.
    Sterner, Jonathan
    University of Skövde, School of Humanities and Informatics.
    I jakten på flow: Gameplay Progression i Pervasive Games2013Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Hur kan svårighetsprogression användas i skapandet av Puzzlehunts med syfte att uppnå en ökad upplevd känsla av flow hos spelaren? Denna frågeställning behandlas i uppsatsen och problemet som måste lösas är hur man kan bygga upp en ackumulerad kunskap om något vars syfte är att hela tiden tvinga dig att hitta nya lösningar på problem. I mer traditionella spel kan upprepning lära spelaren hur spelmekaniken fungerar. I puzzlehunts kan upprepning av spelmekanik inte användas eftersom målet för varje pussel är att hitta mekaniken som löser problemet. Uppsatsen visar att man genom inlärning av hur man skall tänka för att hitta lösningarna till pusslen kan bygga upp en ackumulerad kunskap hos spelaren och därmed även ha en svårighetsprogression och öka upplevd nivå av flow hos spelaren.

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