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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
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Explicating, Understanding and Managing Technical Debt from Self-Driving Miniature Car Projects2014Inngår i: Proceedings 2014 6th IEEE International Workshop on Managing Technical Debt: MTD 2014, Los Alamitos, CA: IEEE Computer Society, 2014, s. 11-18Konferansepaper (Fagfellevurdert)
    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, Laya
    et al.
    Department of Applied Mathematics, Faculty of Mathematics and Computer, Shahid Bahonar University of Kerman, Kerman, Iran.
    Torra, Vicenç
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    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 partitions2016Inngår i: International Journal of Computational Intelligence Systems, ISSN 1875-6891, E-ISSN 1875-6883, Vol. 9, nr 3, s. 497-505Artikkel i tidsskrift (Fagfellevurdert)
    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
    Högskolan i Skövde, Institutionen för teknik och samhälle.
    Programming and Image Processing in a Compact Production Cell2012Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
    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.
    Ayani, Mikel
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ng, Amos H. C.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Birtic, Martin
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Optimizing Cycle Time and Energy Efficiency of a Robotic Cell Using an Emulation Model2018Inngår i: Advances in Manufacturing Technology XXXII: Proceedings of the 16th International Conference on Manufacturing Research, incorporating the 33rd National Conference on Manufacturing Research, September 11–13, 2018, University of Skövde, Sweden / [ed] Peter Thorvald, Keith Case, Amsterdam: IOS Press, 2018, Vol. 8, s. 411-416Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Industrial automated systems are mostly designed and pre-adjusted to always work at their maximum production rate. This leaves room for important energy consumption reductions considering the production rate variations of factories in reality. This article presents a multi-objective optimization application targeting cycle time and energy consumption of a robotic cell. A novel approach is presented where an existing emulation model of a fictitious robotic cell was extended with low-level electrical components modeled and encapsulated as FMUs. The model, commanded by PLC and Robot Control software, was subjected to a multi-objective optimization algorithm in order to find the Pareto front between energy consumption and production rate. The result of the optimization process allows selecting the most efficient energy consumption for the robotic cell in order to achieve the required cycle.

  • 5.
    Barrera Diaz, Carlos Alberto
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Oscarsson, Jan
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Lidberg, Simon
    Manufacturing Engineering, Research and Simulation, Volvo Car Corporation, Skövde, Sweden.
    Sellgren, Tommy
    Manufacturing Engineering, Research and Simulation, Volvo Car Corporation, Skövde, Sweden.
    Discrete Event Simulation Output Data-Handling System in an Automotive Manufacturing Plant2018Inngår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, s. 8s. 23-30Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Discrete Event Simulation is a comprehensive tool for the analysis and design of manufacturing systems. Over the years, considerable efforts to improve simulation processes have been made. One step in these efforts is the standardisation of the output data through the development of an appropriate system which presents the results in a standardised way. This paper presents the results of a survey based on simulation projects undertaken in the automotive industry. In addition, it presents the implementation of an automated output data-handling system which aims to simplify the project’s documentation task for the simulation engineers and make the results more accessible for other stakeholders.

  • 6.
    Berg Marklund, Björn
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Backlund, Per
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Dahlin, Carl-Johan
    ius information AB, Skövde, Sweden.
    Engström, Henrik
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Wilhelmsson, Ulf
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    A Game-Based Approach to Support Social Presence and Awareness in Distributed Project-Based Learning2014Inngår i: International Journal of Games Based Learning, ISSN 2155-6849, E-ISSN 2155-6857, Vol. 4, nr 1, s. 1-20Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 7.
    Bergqvist, Emil
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Auditory displays: A study in effectiveness between binaural and stereo audio to support interface navigation2014Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    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.

  • 8.
    Bergström, Erik
    et al.
    Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Högskolan i Skövde, Institutionen för informationsteknologi.
    Pehrsson, Helen
    Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Högskolan i Skövde, Institutionen för informationsteknologi.
    Performance Assessments in Computer Science - An example of student perceptions2014Inngår i: Next Generation Learning Conference: Conference Summary / [ed] Erik Brunnert Walfridsson, 2014, s. 4-16Konferansepaper (Fagfellevurdert)
  • 9.
    Bjurén, Johan
    Högskolan i Skövde, Institutionen för informationsteknologi.
    USING CASE-BASED REASONING FOR PREDICTING ENERGY USAGE2013Independent thesis Advanced level (degree of Master (Two Years)), 30 poäng / 45 hpOppgave
    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.

  • 10.
    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
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    A survey of graph-modification techniques for privacy-preserving on networks2017Inngår i: Artificial Intelligence Review, ISSN 0269-2821, E-ISSN 1573-7462, Vol. 47, nr 3, s. 341-366Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 11.
    Crowston, Kevin
    et al.
    Syracuse University, Syracuse, NY, USA.
    Hammouda, ImedUniversity of Gothenburg, Sweden.Lundell, BjörnHögskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.Robles, GregorioGSyC, Universidad Rey Juan Carlos, Madrid, Spain.Gamalielsson, JonasHögskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.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, Proceedings2016Konferanseproceedings (Fagfellevurdert)
    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.

  • 12.
    Dahlbom, Anders
    et al.
    Högskolan i Skövde, Institutionen för kommunikation och information. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Nordlund, Per-Johan
    Aeronautics, Saab AB, Linköping, Sweden.
    Detection of Hostile Aircraft Behaviors using Dynamic Bayesian Networks2013Inngår i: Proceedings of the 16th International Conference on Information Fusion, IEEE Press, 2013, s. 2033-2040Konferansepaper (Fagfellevurdert)
    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.

  • 13.
    Derenius, Fredrik
    Högskolan i Skövde, Institutionen för kommunikation och information.
    Framställandet av en säker LiveCD för distansarbetare: Ett projekt baserat på öppen källkod2012Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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.

  • 14.
    Einevik, Johan
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Kurri, John
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Emulering av en produktioncell med Visionguidning: Virtuell idrifttagning2017Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Genom att använda sig utav en virtuell kopia utav en produktionscell kan programmering och funktionstester av olika paneler testas i ett tidigt stadie. En virtuell kopia bidrar också till enklare felsökning och minskning av kostnader vid idrifttagning. Tanken med projektet är att undersöka i vilken utsträckning som emuleringsmodellen kan ersätta den riktiga cellen vid ett funktionstest för leverantören. Det som också undersöks är i vilken utsträckning riktiga CAD-ritningar kan användas och vilka krav som ställs på ritningarna för att underlätta emulering. Projektet hade flera utmaningar och en av dem som uppkom under projektets gång var problemet med att det inte gick att emulera säkerhetssystemen. Detta löstes genom att bygla alla säkerhetskretsar i PLC-programmet. En viktig del i emulering är kommunikation mellan de olika programvarorna i systemet. I projektets visade det sig fördelaktigt att dela upp programmen i emuleringssystemet för att fördela resurserna över tre datorer. Att använda sig utav en emuleringsmodell istället för en riktig produktionscell är fortfarande i forskningsstadiet men genom projektet har många användningsområden identifierats och skulle kunna förändra idrifttagning i framtiden.

  • 15.
    Ekanayake, Hiran
    et al.
    Stockholm University, Forum 100, Kista, Sweden / University of Colombo School of Computing.
    Backlund, Per
    Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Högskolan i Skövde, Institutionen för kommunikation och information.
    Ziemke, Tom
    Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Högskolan i Skövde, Institutionen för kommunikation och information.
    Ramberg, Robert
    Stockholm University, Forum 100, Kista, Sweden.
    Hewagamage, Kamalanath P.
    University of Colombo School of Computing.
    Lebram, Mikael
    Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Högskolan i Skövde, Institutionen för kommunikation och information.
    Comparing Expert and Novice Driving Behavior in a Driving Simulator2013Inngår i: Interaction Design and Architecture(s) Journal - IxD&A, ISSN 1826-9745, nr 19, s. 115-131Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 16.
    Ekelund, Kalle
    Högskolan i Skövde, Institutionen för kommunikation och information.
    Q-Learning: Ett sätt att lära agenter att spela fotboll2013Independent thesis Basic level (university diploma), 20 poäng / 30 hpOppgave
    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.

  • 17.
    Eriksson, Fredrik
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Modell för lösenordsklassning: Utveckling av lösenordsklassificering2017Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Abstract [sv]

    I dagens samhälle är datorer ett naturligt inslag i vår vardag. För de flesta anses datorn vara ett verktyg för att hjälpa dem genom arbetet såväl som i vardagen. Dock finns det en mörkare sida där personer använder sig utav datorn för att begå brott. Den så kallade IT-relaterade brottsligheten ökar och ökar och enligt Brå:s rapport från 2016 har en ökning på 949 % skett i Sverige mellan 2006 till 2015 enligt den officiella kriminalstatistiken vad gäller brott som har IT-inslag (Andersson, Hedqvist, Ring & Skarp, 2016).

    För att få fast förövarna krävs det medel för att kunna bevisa att ett brott har begåtts. Ett sätt att göra detta är att gå in i datorn för att leta efter bevis. Om den misstänkte förövaren känner till att det finns möjlighet för denne att komma att bli granskad vad händer då? Möjligheter finns att förövaren försöker göra det så svårt som möjligt att ta sig in datorn. Detta kan då ske genom att kryptera systemet genom att använda sig av en så kallad krypteringsalgoritm för att låsa hårddisken. Denna kryptering kan vara väldigt svår att dekryptera och det kan vara enklare att försöka få tag i det rätta lösenordet istället.

    Denna studie har till syfte att utveckla en modell för lösenordsklassificering. Genom denna modell kan strategier som används när användare skapar sina lösenord identifieras och klassificeras. Detta bidrar till en ökad kunskap om strategier användare har när de skapar lösenord. Då fulldiskkryptering börjar bli en vanligare metod för att hindra någon obehörig från att ta sig in i systemet finns förhoppningen om att modellen ska kunna användas och utvecklas till att skapa ett ramverk för att underlätta arbetet för forensikerna hos polisen samt andra rättsvårdande myndigheter. Med denna modell kan olika strategier som olika typer av användare använder sig av när de skapar lösenord vara av sådan karaktär att de kan klassificeras in i en egen kategori. Om en sådan klassificering kan göras skulle det underlätta arbetet för IT-forensikerna och påskynda processen med att knäcka lösenord.

    Studien utförs genom att använda en kvalitativ metod samt validering utav modellen. Genom kvalitativa intervjuer samlas information in som sedan analyseras och används för att utveckla en modell för lösenordsklassificering. Arbetet med att utveckla en modell för lösenordsklassificering har bestått av en iterativ process där återkoppling gjorts gentemot de olika intervjuobjekten. Ett utkast till en modell med grund i befintlig forskning skapades. Utkastet diskuterades sedan med de olika intervjuobjekten, som deltagit i studien, i en iterativ process där modellen uppdaterades och återkopplades mot de olika intervjuobjekten. Validering av modellen har genomförts genom att fånga in riktiga lösenord som läckts ut på Internet och sedan testa dessa lösenord mot modellen för lösenordsklassificering.

  • 18.
    Ferm, Linus
    Högskolan i Skövde, Institutionen för informationsteknologi. ferm.ferm@hotmail.se.
    How the graphical representation of the HUD affects the usability of a third person game2018Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
    Abstract [en]

    The HUD is what allows players to interact with the game world and therefore the visual representation of it is of importance to usability. Usability being broken down into three components: effectiveness, efficiency and satisfaction. To study the subject a third person action game was made for the purpose. The game contained two different HUD versions to test different approaches to UI design. Results for the study were, in relation to usability, inconclusive due to a lack of participants and varying degrees of experience within the pool of participants. Preferences were gathered however, and preferences towards the stylized HUD were shown. Further study is promising as other genres could more easily adapt theories from other software fields.

  • 19.
    Ferm, Linus
    Högskolan i Skövde, Institutionen för informationsteknologi.
    How the Graphical Representation of the HUD Affects the Usability of a Third Person Game2018Independent thesis Basic level (degree of Bachelor of Fine Arts), 20 poäng / 30 hpOppgave
    Abstract [en]

    The HUD is what allows players to interact with the game world and therefore thevisual representation of it is of importance to usability. Usability being broken down intothree components: effectiveness, efficiency and satisfaction. To study the subject athird person action game was made for the purpose. The game contained two differentHUD versions to test different approaches to UI design. Results for the study were, inrelation to usability, inconclusive due to a lack of participants and varying degrees ofexperience within the pool of participants. Preferences were gathered however, andpreferences towards the stylized HUD were shown. Further study is promising as othergenres could more easily adapt theories from other software fields.

  • 20.
    Frick, Erik
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Dynamisk grafik med WebGL och Canvas: Atlas och context-switch2015Independent thesis Basic level (university diploma), 20 poäng / 30 hpOppgave
    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.

  • 21.
    Gamalielsson, Jonas
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Lundell, Björn
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    On Involvement in Open Standards: How Do Organisations Contribute to W3C Standards Through Editorship?2016Inngår i: 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, s. 57-70Konferansepaper (Fagfellevurdert)
    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.

  • 22.
    Ghorbani, Ali
    et al.
    University of New Brunswick, Canada.
    Torra, VincençHögskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.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 Trust2015Konferanseproceedings (Fagfellevurdert)
  • 23.
    Goienetxea Uriarte, Ainhoa
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Urenda Moris, Matías
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ng, Amos H. C.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Oscarsson, Jan
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Lean, Simulation and Optimization: A Win-Win combination2016Inngår i: 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, s. 2227-2238Konferansepaper (Fagfellevurdert)
    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.

  • 24.
    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
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    "why do they need to check me?" patient participation through ehealth and the doctor-patient relationship: Qualitative study2018Inngår i: Journal of Medical Internet Research, ISSN 1438-8871, E-ISSN 1438-8871, Vol. 20, nr 1, artikkel-id e11Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 25.
    Hallin, Jonas
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Svärm-AI i shooters2015Independent thesis Basic level (university diploma), 20 poäng / 30 hpOppgave
    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.

  • 26.
    Heljegård, Filip
    Högskolan i Skövde, Institutionen för informationsteknologi.
    HTML5 Canvas object rendering: Rendering av olika objekt i olika webbläsare2015Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
    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.

  • 27.
    Hernández Rentería, Luis Alejandro
    Högskolan i Skövde, Institutionen för informationsteknologi.
    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 poäng / 22,5 hpOppgave
    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.

  • 28.
    Hesselbom, Anton
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Neuroevolution med tävlingsinriktad samevolution i flera miljöer med ökande komplexitet2017Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
    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.

  • 29.
    Holgersson, Jesper
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Linköping University, Sweden.
    Melin, Ulf
    Linköping University, Sweden.
    Lindgren, Ida
    Linköping University, Sweden.
    Axelsson, Karin
    Linköping University, Sweden.
    Exploring User Participation Practice in Public E-Service Development: Why, How and in Whose Interest?2018Inngår i: The Electronic Journal of e-Government, ISSN 1479-439X, Vol. 16, nr 1, s. 72-86Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    User participation is seen as an important enabler for successful public e-service development. However, at the same time development of public e-services is still often characterised by an internal government perspective with little consideration for external users’ perspectives. This paper challenges the overly positive attitude that is surrounding user participation in e-government research. The paper aims to illustrate and problematize various aspects that influence why, how, and in whose interest user participation is conducted in public e-service development. First, via a literature review, we identify a set of dimensions for critically exploring how, why, and in whose interest user participation is conducted in public e-service development projects. Second, we use these dimensions in order to characterise and analyse three empirical public e-service development cases in order to test the utility, usefulness, and feasibility of the identified dimensions. Our findings highlight the importance of questioning and elaborating on the motives behind user participation (the why) in public e-service development. We also identify two basic forms of how user participation is addressed in public e-service development projects: 1) veneered participation, and 2) ad-hoc participation. Furthermore, we argue that any decisions made regarding user participation in public e-service development should be based on conscious and informed choices concerning why user participation is needed and what it may bring for different stakeholders and their interests.

  • 30.
    Istanbullu, Alexander
    Högskolan i Skövde, Institutionen för kommunikation och information.
    Prestandajämförelse av textbaserade och binära dataformat för AJAX2013Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
    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.

  • 31.
    Jeusfeld, Manfred
    Tillburg University, Netherlands.
    Metamodeling and method engineering with ConceptBase2009Inngår i: Metamodeling for Method Engineering / [ed] Manfred Jeusfeld, Matthias Jarke, John Mylopoulos, Cambridge, Massachusetts, USA: MIT Press, 2009Kapittel i bok, del av antologi (Annet vitenskapelig)
    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.

  • 32.
    Jeusfeld, Manfred
    et al.
    Högskolan i Skövde, Institutionen för kommunikation och information.
    Delcambre, Lois
    Ling, Tok Wang
    Preface: Special Section featuring extended papers from the 30th International Conference on Conceptual Modeling (ER-2011)2013Inngår i: Data & Knowledge Engineering, ISSN 0169-023X, E-ISSN 1872-6933, Vol. 87, s. 259-Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
    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.

  • 33.
    Johansson, David
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Applicability analysis of computation double entendre humor recognition with machine learning methods2016Independent thesis Basic level (degree of Bachelor), 20 poäng / 30 hpOppgave
  • 34.
    Johansson, Jonatan
    Högskolan i Skövde, Institutionen för informationsteknologi.
    COUNTERMEASURES AGAINST COORDINATED CYBER-ATTACKS TOWARDS POWER GRID SYSTEMS: A systematic literature study2019Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Abstract [en]

    A study on countermeasures against coordinated cyber-attacks (CCA) towards power grid systems has been carried out. A coordinated cyber-attack is a cyber-based attack where multiple attackers use multiple attack-mechanisms towards multiple targets in a coordinated fashion. The coordination is based on that the different attack-mechanisms help each other in attacking the target. A CCA is made up of different stages where each stage consists of a number of attack-mechanisms and together have a certain purpose. The different stages are used to systematically advance towards its goal, which is to compromise the operation of internal systems or to steal confidential data. For example, the first stage may be used to locate entry points at the target system, and a second stage may be used to locate vulnerable hosts by sniffing ongoing network activity to further itself towards its attack goal.     Power grids that are used to generate, transmit, and distribute electricity over large geographical areas are connected to the Internet. Within these environments, commercial IT systems have been adopted to control their electrical equipment, which poses cybersecurity risks to the power grid.     Intrusion Detection Systems (IDS) are designed provide internal network protection in case of intruders. However, state-of-the-art IDSs has been found to have certain limitations in protecting against multi-stage and slow attacks. The inadequacy of state-of-the-art IDSs for protecting against CCAs motivates the need to identify alternate countermeasures that can mitigate CCAs, when the target is a power grid system. The method of choice to address this problem in this study is a systematic literature study where 48 countermeasures were identified and assessed to which extent they are suitable to mitigate CCAs. Results suggest to follow three approaches, namely to preemptively identify technical vulnerabilities in the local system, to distribute intrusion detection hosts across a larger network for better situational awareness, and to implement new types of IDS technologies. Countermeasures with references to specific publications are also provided. The study contributes to how security operators of power grids can fulfil the requirement on cybersecurity as demanded by the NIS directive of the European Union regarding protection against CCAs.

  • 35.
    Karlsson, Ingemar
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Bernedixen, Jacob
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ng, Amos H. C.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Pehrsson, Leif
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Combining augmented reality and simulation-based optimization for decision support in manufacturing2017Inngår i: 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), 2017, s. 3988-3999Konferansepaper (Fagfellevurdert)
    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. 

  • 36.
    Karlsson, Johanna
    Högskolan i Skövde, Institutionen för informationsteknologi.
    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 poäng / 22,5 hpOppgave
    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.

  • 37.
    Katz, Andrew
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Moorcrofts LLP Solicitors, Buckinghamshire, United Kingdom.
    Lundell, Björn
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Gamalielsson, Jonas
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Software, copyright and the learning environment: An analysis of the IT contracts Swedish schools impose on their students and the implications for FOSS2016Inngår i: International Free and Open Source Software Law Review, ISSN 1877-6922, Vol. 8, nr 1, s. 1-28Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 38.
    Kauküla, Marcus
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Analysing Performance Effects of Deduplication on Virtual Machine Storage2017Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    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.

  • 39.
    Knutsson, Viktor
    Högskolan i Skövde, Institutionen för kommunikation och information.
    Nätverksövervakning av industriella miljöer: En lösning med öppen källkod2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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.

  • 40.
    Lars, Bartha
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Biometriska säkerhetslösningars inverkan på IT-forensik inom polisen: En kvalitativ intervjustudie2018Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Abstract [sv]

    Lösenord har länge varit den metod som föredragits av användare för att skydda användarkonton och känslig information. I strävan till att finna enklare, snabbare och säkrare autentiseringsmetoder har biometriska säkerhetslösningar snabbt vuxit i popularitet. Mobiltelefoner har traditionellt skyddats med hjälp av lösenord men har på senare tid även börjat inkludera någon form av biometrisk sensor för autentisering.  

    Genom att utföra en kvalitativ intervjustudie med IT-forensiker som arbetar på Polismyndigheten inom olika distrikt i Västra Götalands län undersökte denna studie forskningsfrågan: hur har biometriska säkerhetslösningar i jämförelse med lösenord påverkat IT-forensikerns arbete på Polismyndigheten?

    Studien visar att biometrisk utrustning inte ger extra säkerhet i jämförelse med lösenord, eftersom en bakomliggande säkerhetskod alltid finns till hands ifall den biometriska sensorn slutar fungera. Därmed dras biometriska enheter med samma sorts svagheter som alltid funnits med lösenord.

    Nyckelord: biometri, lösenord, säkerhet, etik, juridik, IT-forensik.

  • 41.
    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
    Högskolan i Skövde, Institutionen för informationsteknologi.
    Assessing the state-of-practice of model-based engineering in the embedded systems domain2014Inngår i: 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, s. 166-182Konferansepaper (Fagfellevurdert)
    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 ...

  • 42.
    Lundell, Björn
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    E-Governance in Public Sector ICT Procurement: What is Shaping Practice in Sweden?2014Inngår i: 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, s. 103-128Kapittel i bok, del av antologi (Fagfellevurdert)
    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.

  • 43.
    Lundell, Björn
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Rapport från öppet seminarium om öppna standarder i Riksdagen2015Rapport (Annet (populærvitenskap, debatt, mm))
    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.

  • 44.
    Lundell, Björn
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Gamalielsson, Jonas
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Grahn, Alexander
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    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 Drupal2014Inngår i: OpenSym '14: Proceedings of The International Symposium on Open Collaboration, New York: ACM Digital Library, 2014, s. 3:1-3:10Konferansepaper (Fagfellevurdert)
    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.

  • 45.
    Lundell, Björn
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Gamalielsson, Jonas
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Katz, Andrew
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi. Moorcrofts LLP, Sweden.
    On implementation of Open Standards in software: To what extent can ISO standards be implemented in open source software?2015Inngår i: International Journal of Standardization Research, ISSN 2470-8542, Vol. 13, nr 1, s. 47-73Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 46.
    Löwenberg, Jakob
    Högskolan i Skövde, Institutionen för informationsteknologi.
    CAN FRIVOLOUS ELEMENTS INCREASE PLAYER RETENTION IN A SERIOUS GAME?2018Independent thesis Advanced level (degree of Master (One Year)), 15 poäng / 22,5 hpOppgave
    Abstract [en]

    The focus of this thesis is to examine if it is possible to increase player retention in a serious game simply by adding a number of game elements that do not aid in the games serious purpose. In order to study this two versions of a serious game called Frogsnap, one with these elements and one without, are examined. The results from this examination is that the game elements managed to increase the time participants interacted with the game, and how many levels they completed. But they did not increase the amount of data that the game collected, which means that they alone did not manage to make the game more efficient in completing its purpose.

  • 47. Narukawa, Yasuo
    et al.
    Torra, Vicenç
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    New results on hesitant fuzzy sets: score functions2015Inngår i: The 12th International Conference on Modeling Decisions for Artificial Intelligence: CD-ROM Proceedings, MDAI - HiS , 2015Konferansepaper (Fagfellevurdert)
  • 48.
    Ng, Amos H. C.
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Shaaban, Sabry
    Department of Strategy, ESC La Rochelle, La Rochelle, France.
    Bernedixen, Jacob
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Studying unbalanced workload and buffer allocation of production systems using multi-objective optimisation2017Inngår i: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 55, nr 24, s. 7435-7451Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 49.
    Nordberg, Pontus
    Högskolan i Skövde, Institutionen för informationsteknologi.
    CHALLENGES IN SECURITY AUDITS IN OPEN SOURCE SYSTEMS2019Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Abstract [en]

    Today there is a heavy integration of information technology in almost every aspect of our lives and there is an increase in computer security that goes with it. To ensure this security, and that policies and procedures within an organisations related to this security are enforced; security audits are conducted.

    At the same time, use of open source software is also becoming increasingly common, becoming more a fact of life rather than an option. With these two trends in mind, this study analyses a selection of scientific literature on the topic and identifies the unique challenges a security audit in an open source environment faces, and aims to contribute on how to help alleviate the challenges.

    The study was performed in the form of a literature review, where the comparison and analysis revealed interesting information regarding the open source specific challenges, including both technical issues as well as challenges stemming from people’s perception and handling of open source software today.

    The answer to the question “What are the challenges when conducting security audits for open source systems and how can they be alleviated?” shows the main challenges to be too much trust is put in unverified binaries. The report offers suggestions and ideas on how to implement solutions in order to help diminish this challenge through the use and integration of Reproducible Builds, answering the second part of the question.

  • 50.
    Olson, Maria
    et al.
    Högskolan i Skövde, Institutionen för hälsa och lärande. Högskolan i Skövde, Forskningsspecialiseringen Hälsa och Lärande. Stockholm University.
    Gamalielsson, Jonas
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Gustavsson, Susanne
    Högskolan i Skövde, Institutionen för hälsa och lärande. Högskolan i Skövde, Forskningsspecialiseringen Hälsa och Lärande.
    Lundell, Björn
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Addressing Democratic and Didactic Implications of Different Technological Offerings in Compulsory School Teaching Practices2014Inngår i: Next Generation Learning Conference: Conference Summary / [ed] Erik Brunnert Walfridsson, Högskolan Dalarna, 2014, s. 52-62Konferansepaper (Fagfellevurdert)
    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.

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