his.sePublications
Change search
Refine search result
2345678 201 - 250 of 3529
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 201.
    Asklöf, Björn
    University of Skövde, School of Humanities and Informatics.
    Kommersiella spel som plattform för ledningssystem: En jämförande studie mellan klanledare och kompanichefers situationsmedvetenhet i form av riskbedömning.2007Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Denna rapport syftar till att undersöka i vilken utsträckning stridsvagnskompanichefer skiljer och/eller liknar ”commanders” (i spelet ”Battlefield 2”) i sitt sätt att skapa och upprätthålla situationsmedvetenhet med avseende på riskbedömning kopplat till fiendens position i slagfältet. Studien grundar sig på en tanke om att utnyttja positiva effekter från datorspelande, i morgondagens ledningssystem genom att bygga ledningssystem grundade på en kommersiell spelplattform. Resultaten pekar bland annat på skillnader mellan de båda aktörernas metoder för att uppnå full situationsmedvetenhet, men även på vissa likheter som till exempel att se på en situation med fiendens ögon för att bedöma hur denna kommer att agera.

  • 202.
    Aslam, Irfan
    University of Skövde, School of Informatics.
    Semantic frame based automatic extraction of typological information from descriptive grammars2019Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis project addresses the machine learning (ML) modelling aspects of the problem of automatically extracting typological linguistic information of natural languages spoken in South Asia from annotated descriptive grammars. Without getting stuck into the theory and methods of Natural Language Processing (NLP), the focus has been to develop and test a machine learning (ML) model dedicated to the information extraction part. Starting with the existing state-of-the-art frameworks to get labelled training data through the structured representation of the descriptive grammars, the problem has been modelled as a supervised ML classification task where the annotated text is provided as input and the objective is to classify the input to one of the pre-learned labels. The approach has been to systematically explore the data to develop understanding of the problem domain and then evaluate a set of four potential ML algorithms using predetermined performance metrics namely: accuracy, recall, precision and f-score. It turned out that the problem splits up into two independent classification tasks: binary classification task and multiclass classification task. The four selected algorithms: Decision Trees, Naïve Bayes, Support VectorMachines, and Logistic Regression belonging to both linear and non-linear families ofML models are independently trained and compared for both classification tasks. Using stratified 10-fold cross validation performance metrics are measured and the candidate algorithms  are compared. Logistic Regression provided overall best results with DecisionTree as the close follow up. Finally, the Logistic Regression model was selected for further fine tuning and used in a web demo for typological information extraction tool developed to show the usability of the ML model in the field.

  • 203.
    Aslam, Tehseen
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre.
    Analysis of manufacturing supply chains using system dynamics and multi-objective optimization2013Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Supply chains are in general complex networks composed of autonomous entities whereby multiple performance measures in different levels, which in most cases are in conflict with each other, have to be taken into account. Hence, due to the multiple performance measures, supply chain decision making is much more complex than treating it as a single objective optimization problem. Thus, the aim of the doctoral thesis is to address the supply chain optimization problem within a truly Pareto-based multi-objective context and utilize knowledge extraction techniques to extract valuable and useful information from the Pareto optimal solutions. By knowledge extraction, it means to detect hidden interrelationships between the Pareto solutions, identify common properties and characteristics of the Pareto solutions as well as discover concealed structures in the Pareto optimal data set in order to support managers in their decision making. This aim is addressed through the SBO-framework where the simulation methodology is based on system dynamics (SD) and the optimization utilizes multi-objective optimization (MOO). In order to connect the SD and MOO software, this doctoral thesis introduced a novel SD and MOO interface application which allow the modeling and optimization applications to interact. Additionally, this thesis work also presents a novel SD-MOO methodology that addresses the issue of curse off dimensionality in MOO for higher dimensional problems and with the aim to execute supply chain SD-MOO in a computationally cost efficient way, in terms of convergence, solution intensification and accuracy of obtaining the Pareto-optimal front for complex supply chain problems. In order to detect evident and hidden structures, characteristics and properties of the Pareto-optimal solutions, this work utilizes Parallel Coordinates, Clustering and Innovization, which are three different types of tools for post-optimal analysis and facilitators of discovering and retrieving knowledge from the Pareto-optimal set. The developed SD-MOO interface and methodology are then verified and validated through two academic case studies and a real-world industrial application case study. While not all the insights generated in these application studies can be generalized for other supply-chain systems, the analysis results provide strong indications that the methodology and techniques introduced in this thesis are capable to generate knowledge to support academic SCM research and real-world SCM decision making, which to our knowledge cannot be performed by other methods.

  • 204.
    Aslan, David
    University of Skövde, School of Informatics.
    Lagring av Motion Capture Data i NoSQL-databser: Undersökning av CouchDB2015Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Motion capture data behöver lagra på ett eller annat sätt lagra detta med databas skulle innebära väldigt många fördelar. Den används på många olika sätt och i olika branscher därmed skulle innebära en stor förändring. Det finns två olika kategorier av databaser SQL databaser och NoSQL databaser, dem databaser som kommer testas är relationsbaserade MySQL och dokumentbaserade CouchDB med en prototyp som utvecklas för att utföra dessa tester. Testerna påvisar att CouchDB är bättre databaslösningen vid lagringen av motion capture data. Men ytterligare arbete skulle kunna utföra flera tester som påvisar att läsning av motion capture data från databaserna kan ske i realtid. Mätningar från experimentet bevisar att CouchDB är den snabbare på att lagra Motion Capture data. I framtida arbete skulle arbetet kunna införas i filmbranschen och bli effektivt genom att använda mindre hårddiskutrymme och minska kostnaderna.

  • 205.
    Asp, Julia
    et al.
    Univ Gothenburg, Dept Clin Chem & Transfus Med, Inst Biomed, Sahlgrenska Acad, S-41345 Gothenburg, Sweden .
    Synnergren, Jane
    University of Skövde, The Systems Biology Research Centre. University of Skövde, School of Life Sciences.
    Jonsson, Marianne
    Univ Gothenburg, Dept Clin Chem & Transfus Med, Inst Biomed, Sahlgrenska Acad, S-41345 Gothenburg, Sweden .
    Dellgren, Goran
    Univ Gothenburg, Dept Mol & Clin Med, Sahlgrenska Acad, S-41345 Gothenburg, Sweden / Sahlgrens Univ Hosp, Dept Cardiothorac Surg, Gothenburg, Sweden.
    Jeppsson, Anders
    Univ Gothenburg, Dept Mol & Clin Med, Sahlgrenska Acad, S-41345 Gothenburg, Sweden / Sahlgrens Univ Hosp, Dept Cardiothorac Surg, Gothenburg, Sweden.
    Comparison of human cardiac gene expression profiles in paired samples of right atrium and left ventricle collected in vivo2012In: Physiological Genomics, ISSN 1094-8341, E-ISSN 1531-2267, Vol. 44, no 1, p. 89-98Article in journal (Refereed)
    Abstract [en]

    Asp J, Synnergren J, Jonsson M, Dellgren G, Jeppsson A. Comparison of human cardiac gene expression profiles in paired samples of right atrium and left ventricle collected in vivo. Physiol Genomics 44: 89-98, 2012. First published November 15, 2011; doi: 10.1152/physiolgenomics.00137.2011.-Studies of expressed genes in human heart provide insight into both physiological and pathophysiological mechanisms. This is of importance for extended understanding of cardiac function as well as development of new therapeutic drugs. Heart tissue for gene expression studies is generally hard to obtain, particularly from the ventricles. Since different parts of the heart have different functions, expression profiles should likely differ between these parts. The aim of the study was therefore to compare the global gene expression in cardiac tissue from the more accessible auricula of the right atrium to expression in tissue from the left ventricle. Tissue samples were collected from five men undergoing aortic valve replacement or coronary artery bypass grafting. Global gene expression analysis identified 542 genes as differentially expressed between the samples extracted from these two locations, corresponding to similar to 2% of the genes covered by the microarray; 416 genes were identified as abundantly expressed in right atrium, and 126 genes were abundantly expressed in left ventricle. Further analysis of the differentially expressed genes according to available annotations, information from curated pathways and known protein interactions, showed that genes with higher expression in the ventricle were mainly associated with contractile work of the heart. Transcription in biopsies from the auricula of the right atrium on the other hand indicated a wider area of functions, including immunity and defense. In conclusion, our results suggest that biopsies from the auricula of the right atrium may be suitable for various genetic studies, but not studies directly related to muscle work.

  • 206.
    Aspehed, Anne-Marie
    University of Skövde, Department of Computer Science.
    Ger användarnas delaktighet vid förändringsarbete ökad acceptans: vilken påverkan har användbarhet och lättanvändhet2003Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Syftet med detta examensarbete var att undersöka vilka faktorer som påverkat acceptansen hos användare, inom den kommunala verksamheten, vid införande av ett datoriserat system. Med acceptans menas att användarna ska kunna utföra sina arbetsuppgifter på ett bra och lätt sätt. Studien har gjorts utifrån användarnas perspektiv.

    Genom att genomföra en intervjuundersökning på ett flertal kommuner där användarna använder systemet Vabas/Duf, har undersökts hur användarnas upplevda acceptans påverkas av faktorerna delaktighet, användbarhet och lättanvändhet, vid införande av ett datoriserat system. Delaktigheten vid införandet av ett system innefattar även information och utbildning.

    Resultatet från undersökningen visade att delaktigheten ökade användarnas acceptans. Ingen avgörande slutsats kunde däremot dras mellan acceptans och faktorerna användbarhet och lättanvändhet, då resultatet från de båda grupperna inte visade någon märkbar skillnad.

  • 207.
    Asplund, Anton
    University of Skövde, School of Humanities and Informatics.
    WEBBSERVRAR: En jämförelsestudie mellan proprietär och Open source webbservrar2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Nuförtiden är det mycket vanligt att människor och företag använder en hemsida för att synas. Hemsidor kan vara uppbyggda på olika sätt och av olika datorspråk, men de måste i grund och botten köras på en webbserver för att kunna fungera som en webbplats.Det här examenarbete undersöker prestandan för proprietär webbserver och webbserver som är av typen öppen källkod. Webbservrarna prestandatestades på hur väl de klarar av att distribuera olika sorters material som är vanligt förekommande i dagens webbsidor. Resultaten ifrån prestandamätningarna visar att webbservern av typen öppen källkod presterar i regel bättre än de proprietära webbservarna. En litteraturstudie genomfördes även för att se hur funktionaliteten för webbservern av typen öppen källkod kunde utvidgas. Studien visar att det finns någorlunda goda möjligheter att utvidga funktionaliteten. Endast ett fåtal webbservrar och språk testades i detta examensarbete, vilket lämnar plats för ytterligare framtida studier inom ämnet.

  • 208.
    Asplund, Emil
    University of Skövde, Department of Computer Science.
    Integration av affärssystem och e-handelssystem2001Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Denna rapport behandlar ett tämligen outforskat delområde inom elektroniskt handel, nämligen integration av affärssystem och e-handelssystem. Huvudfrågan i denna rapport går ut på att undersöka hur företag har integrerat sitt affärssystem med sitt e-handelssystem. För att besvara huvudfrågan delades den upp i tre delfrågor. Dessa sökte besvara dels på vilken nivå inom Enterprise Application Integration som företagen hade integrerat systemen, dels vilka integrationstekniker företagen använder för att integrera systemen samt dels vilka effekter integrationen medfört för företagen. För att besvara problemställningen utfördes telefonintervjuer med fyra företag. Resultatet av undersökningen var att samtliga företag hade integrerat på Enterprise Application Integrations datanivå, vilket även var den nivå de hade börjat med att integrera. De integrationstekniker som användes varierade. Det var dock inte särskilt vanligt att använda nyare integrationstekniker. Integrationen medförde genomgående positiva effekter för företagen, även om vissa problem kvarstod. Inga större nya problem uppkom dock.

  • 209.
    Asthorsson, Axel
    University of Skövde, School of Humanities and Informatics.
    Simulation meta-modeling of complex industrial production systems using neural networks2006Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    Simulations are widely used for analysis and design of complex systems. Real-world complex systems are often too complex to be expressed with tractable mathematical formulations. Therefore simulations are often used instead of mathematical formulations because of their flexibility and ability to model real-world complex systems in some detail. Simulation models can often be complex and slow which lead to the development of simulation meta-models that are simpler and faster models of complex simulation models. Artificial neural networks (ANNs) have been studied for use as simulation meta-models with different results. This final year project further studies the use of ANNs as simulation meta-models by comparing the predictability of five different neural network architectures: feed-forward-, generalized feed-forward-, modular-, radial basis- and Elman artificial neural networks where the underlying simulation is of complex production system. The results where that all architectures gave acceptable results even though it can be said that Elman- and feed-forward ANNs performed the best of the tests conducted here. The difference in accuracy and generalization was considerably small.

  • 210.
    Asthorsson, Kjartan
    University of Skövde, Department of Computer Science.
    Evaluation of view maintenance with complex joins in a data warehouse environment2002Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Data warehouse maintenance and maintenance cost has been well studied in the literature. Integrating data sources, in a data warehouse environment, may often need data cleaning, transformation, or any other function applied to the data in order to integrate it. The impact on view maintenance, when data is integrated with other comparison operators than defined in theta join, has, however, not been closely looked at in previous studies.

    In this study the impact of using a complex join in data warehouse environment is analyzed to measure how different maintenance strategies are affected when data needs to be integrated using other comparison operators than defined in a theta join. The analysis shows that maintenance cost is greatly increased when using complex joins since such joins often lack optimization techniques which are available when using a theta join. The study shows, among other things, that the join aware capability of sources is not of importance when performing complex joins, and incremental view maintenance is better approach than using recomputed view maintenance, when using complex joins. Strategies for maintaining data warehouses when data is integrated using a complex join are therefore different than when a theta join is used, and different maintenance strategies need to be applied.

  • 211.
    Atif, Yacine
    Information Technology College of United Arab Emirates University.
    Building Trust in E-Commerce2002In: IEEE Internet Computing, ISSN 1089-7801, E-ISSN 1941-0131, Vol. 6, no 1, p. 18-24Article in journal (Refereed)
    Abstract [en]

    A network of Internet-based intermediaries that guarantee delivery and payment in e-commerce could help bolster consumer and merchant confidence.

  • 212. Atif, Yacine
    Conversational learning integration in technology enhanced classrooms2013In: Computers in human behavior, ISSN 0747-5632, E-ISSN 1873-7692, Vol. 29, no 2, p. 416-423Article in journal (Refereed)
    Abstract [en]

    Today’s college students have grown up with technology. These digital natives typically gravitate toward group activities in technology embedded social contexts. However, despite this multidimensional evolution, little has changed in conventional classrooms where they build their education experience. We investigate learning models in a classroom environment which still remains the main driver of education today. We describe a conversational learning model based on group activities which involve multi-party conversations. We implement this model in a technology-enhanced studio-classroom to “visualize” conversations which otherwise would remain abstract to learners. Teachers are empowered with instructional patterns to guide their changing role in this novel classroom environment. Based on standard assessment indicators, we conduct an experimental analysis which results show interesting tradeoffs of learning performance that favor the proposed conversational learning approach compared to those obtained from conventional instruction.

  • 213.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Al-Falahi, Kanna
    College of Information Technology, United Arab Emirates University, Al-Ain, United Arab Emirates.
    Wangchuk, Tshering
    Royal Institute of Management, Thimphu, Bhutan.
    Lindström, Birgitta
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A fuzzy logic approach to influence maximization in social networks2019In: Journal of Ambient Intelligence and Humanized Computing, ISSN 1868-5137, E-ISSN 1868-5145Article in journal (Refereed)
    Abstract [en]

    Within a community, social relationships are paramount to profile individuals’ conduct. For instance, an individual within a social network might be compelled to embrace a behaviour that his/her companion has recently adopted. Such social attitude is labelled social influence, which assesses the extent by which an individual’s social neighbourhood adopt that individual’s behaviour. We suggest an original approach to influence maximization using a fuzzy-logic based model, which combines influence-weights associated with historical logs of the social network users, and their favourable location in the network. Our approach uses a two-phases process to maximise influence diffusion. First, we harness the complexity of the problem by partitioning the network into significantly-enriched community-structures, which we then use as modules to locate the most influential nodes across the entire network. These key users are determined relatively to a fuzzy-logic based technique that identifies the most influential users, out of which the seed-set candidates to diffuse a behaviour or an innovation are extracted following the allocated budget for the influence campaign. This way to deal with influence propagation in social networks, is different from previous models, which do not compare structural and behavioural attributes among members of the network. The performance results show the validity of the proposed partitioning-approach of a social network into communities, and its contribution to “activate” a higher number of nodes overall. Our experimental study involves both empirical and real contemporary social-networks, whereby a smaller seed set of key users, is shown to scale influence to the high-end compared to some renowned techniques, which employ a larger seed set of key users and yet they influence less nodes in the social network.

  • 214.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Chou, Chien
    Institute of Education, National Chiao Tung University, Taiwan.
    Digital Citizenship: Innovations in Education, Practice, and Pedagogy2018In: Educational Technology & Society, ISSN 1176-3647, E-ISSN 1436-4522, Vol. 21, no 1, p. 3p. 152-154Article in journal (Refereed)
    Abstract [en]

    There are still disparities in technology-access despite economic pressures and widespread promises to overcome them. The induced digital gap defines the degree of digital citizenship for which, unified policies have yet to be drawn at various educational levels to reduce that gap. The quest for a broad participation to develop digital citizenship competencies needs further investigations into innovative educational approaches, pedagogical methods, and routine practices that foster digital literacy, and narrows the digital divide. This special issue accumulates original theoretical and empirical research contributions across contemporary digital citizenship perspectives. The final selection of the papers explores digital citizenship concepts such as ethics, digital literacy and participation, in various contexts to develop opportunities for a wider engagement in social actions. The international perspectives of contributing authors shed lights on digital citizenship prospects across unique contexts among different nations. 

  • 215.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ding, Jianguo
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Jeusfeld, Manfred A.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Internet of Things Approach to Cloud-Based Smart Car Parking2016In: The 7th International Conference on Emerging Ubiquitous Systems and Pervasive Networks (EUSPN 2016)/The 6th International Conference on Current and Future Trends of Information and Communication Technologies in Healthcare (ICTH-2016)/Affiliated Workshops / [ed] Elhadi Shakshuki, Elsevier, 2016, Vol. 98, p. 193-198Conference paper (Refereed)
    Abstract [en]

    Concerns for parking are becoming imminent to best support the urban core. These persistent parking problems could be turned into new opportunities, brought by current trends in meeting the globally connected continuum. This paper reveals a work-in- progress to capitalize on private land properties for parking, in order to relieve stress on public agencies, create new sources of revenue, and enlist new entities in the intermediary market. These intermediaries, labelled as Parking Service Providers (or PSPs) play a broker role through advertising parking lots on a shared cloud platform. To streamline these business collaborations and related processes, physical parking lots are augmented with Internet connectivity allowing cloud-provided applications to congregate these lots into a larger inventory. The Internet of Things (IoT) paradigm expands the scope of cloud-based intelligent car parking services in smart cities, with novel applications that better regulate car-parking related traffic. This paper presents a work-in-progress agenda that contributes to new business solutions and state-of-the-art research impacts. We reveal a multi- layered system of PSP-business model through interdisciplinary research blocks where original results are expected to be made at each layer.

  • 216.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ding, Jianguo
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lindström, Birgitta
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Jeusfeld, Manfred
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Andler, Sten F.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Yuning, Jiang
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Brax, Christoffer
    CombiTech AB, Skövde, Sweden.
    Gustavsson, Per M.
    CombiTech AB, Skövde, Sweden.
    Cyber-Threat Intelligence Architecture for Smart-Grid Critical Infrastructures Protection2017Conference paper (Refereed)
    Abstract [en]

    Critical infrastructures (CIs) are becoming increasingly sophisticated with embedded cyber-physical systems (CPSs) that provide managerial automation and autonomic controls. Yet these advances expose CI components to new cyber-threats, leading to a chain of dysfunctionalities with catastrophic socio-economical implications. We propose a comprehensive architectural model to support the development of incident management tools that provide situation-awareness and cyber-threats intelligence for CI protection, with a special focus on smart-grid CI. The goal is to unleash forensic data from CPS-based CIs to perform some predictive analytics. In doing so, we use some AI (Artificial Intelligence) paradigms for both data collection, threat detection, and cascade-effects prediction. 

  • 217.
    Atif, Yacine
    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.
    Lundell, Björn
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Open Source Collaboration Tools and Organisational Learning: On Adopting EtherPad in Small Companies2016In: Proceedings of FLOSSEdu: FLOSS education and computational thinking workshop. Open Source Systems Conference 2016. Gothenburg, Sweden., 2016Conference paper (Refereed)
    Abstract [en]

    Organisations could benefit from the improvements in collaborative learning and increased control gained by the use of open source software. EtherPad enables simultaneous updates on a shared document from remotely located participants. We discuss the adoption life-cycle of this open source tool in the context of a strategic intervention, with a focus on a learning agenda to guide the installation and configuration processes, and to reduce the learning curve involved in the adoption experience.

  • 218.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Jiang, Yuning
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Jeusfeld, Manfred A.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ding, Jianguo
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lindström, Birgitta
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Andler, Sten F.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Brax, Christoffer
    Combitech.
    Haglund, Daniel
    Combitech.
    Lindström, Björn
    Combitech.
    Cyber-threat analysis for Cyber-Physical Systems: Technical report for Package 4, Activity 3 of ELVIRA project2018Report (Other academic)
    Abstract [en]

    Smart grid employs ICT infrastructure and network connectivity to optimize efficiency and deliver new functionalities. This evolu- tion is associated with an increased risk for cybersecurity threats that may hamper smart grid operations. Power utility providers need tools for assessing risk of prevailing cyberthreats over ICT infrastructures. The need for frameworks to guide the develop- ment of these tools is essential to define and reveal vulnerability analysis indicators. We propose a data-driven approach for design- ing testbeds to evaluate the vulnerability of cyberphysical systems against cyberthreats. The proposed framework uses data reported from multiple components of cyberphysical system architecture layers, including physical, control, and cyber layers. At the phys- ical layer, we consider component inventory and related physi- cal flows. At the control level, we consider control data, such as SCADA data flows in industrial and critical infrastructure control systems. Finally, at the cyber layer level, we consider existing secu- rity and monitoring data from cyber-incident event management tools, which are increasingly embedded into the control fabrics of cyberphysical systems.

  • 219.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Jiang, Yuning
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lindström, Birgitta
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ding, Jianguo
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Jeusfeld, Manfred
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Andler, Sten
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Nero, Eva
    Combitech, Sweden.
    Brax, Christoffer
    Combitech, Sweden.
    Haglund, Daniel
    Combitech, Sweden.
    Multi-agent Systems for Power Grid Monitoring: Technical report for Package 4.1 of ELVIRA project2018Report (Other academic)
    Abstract [en]

    This document reports a technical description of ELVIRA project results obtained as part of Work- package 4.1 entitled “Multi-agent systems for power Grid monitoring”. ELVIRA project is a collaboration between researchers in School of IT at University of Skövde and Combitech Technical Consulting Company in Sweden, with the aim to design, develop and test a testbed simulator for critical infrastructures cybersecurity. This report outlines intelligent approaches that continuously analyze data flows generated by Supervisory Control And Data Acquisition (SCADA) systems, which monitor contemporary power grid infrastructures. However, cybersecurity threats and security mechanisms cannot be analyzed and tested on actual systems, and thus testbed simulators are necessary to assess vulnerabilities and evaluate the infrastructure resilience against cyberattacks. This report suggests an agent-based model to simulate SCADA- like cyber-components behaviour when facing cyber-infection in order to experiment and test intelligent mitigation mechanisms. 

  • 220.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Kharrazi, Sogol
    National Road Transport Research Institute, Linköping, Sweden.
    Ding, Jianguo
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Andler, Sten F.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Internet of Things data analytics for parking availability prediction and guidance2020In: European transactions on telecommunications, ISSN 1124-318X, E-ISSN 2161-3915Article in journal (Refereed)
    Abstract [en]

    Cutting-edge sensors and devices are increasingly deployed within urban areas to make-up the fabric of transmission control protocol/internet protocol con- nectivity driven by Internet of Things (IoT). This immersion into physical urban environments creates new data streams, which could be exploited to deliver novel cloud-based services. Connected vehicles and road-infrastructure data are leveraged in this article to build applications that alleviate notorious parking and induced traffic-congestion issues. To optimize the utility of parking lots, our proposed SmartPark algorithm employs a discrete Markov-chain model to demystify the future state of a parking lot, by the time a vehicle is expected to reach it. The algorithm features three modular sections. First, a search pro- cess is triggered to identify the expected arrival-time periods to all parking lots in the targeted central business district (CBD) area. This process utilizes smart-pole data streams reporting congestion rates across parking area junc- tions. Then, a predictive analytics phase uses consolidated historical data about past parking dynamics to infer a state-transition matrix, showing the transfor- mation of available spots in a parking lot over short periods of time. Finally, this matrix is projected against similar future seasonal periods to figure out the actual vacancy-expectation of a lot. The performance evaluation over an actual busy CBD area in Stockholm (Sweden) shows increased scalability capa- bilities, when further parking resources are made available, compared to a baseline case algorithm. Using standard urban-mobility simulation packages, the traffic-congestion-aware SmartPark is also shown to minimize the journey duration to the selected parking lot while maximizing the chances to find an available spot at the selected lot.

    The full text will be freely available from 2021-01-09 00:01
  • 221.
    Atif, Yacine
    et al.
    UAE University, United Arab Emirates.
    Mathew, Sujith
    UAE University, United Arab Emirates.
    Lakas, Abderahmane
    UAE University, United Arab Emirates.
    Building a smart campus to support ubiquitous learning2014In: Journal of Ambient Intelligence and Humanized Computing, ISSN 1868-5137, E-ISSN 1868-5145, Vol. 6, no 2, p. 223-238Article in journal (Refereed)
    Abstract [en]

    New technological advances in user mobility and context immersion are enabling novel adaptive and pervasive learning models in ambient environments. These advances allow physical learning spaces with embedded computing capabilities to provide an augmented self-aware learning experience. In this paper, we aim at developing a novel ubiquitous learning model within a pervasive smart campus environment. The goal of our research consists of identifying the steps towards building such an environment and the involved learning processes. We define a model of a smart campus, and advocate learning practices in the light of new paradigms such as context-awareness, ubiquitous learning, pervasive environment, resource virtualization, autonomic computing and adaptive learning. We reveal a comprehensive architecture that defines the various components and their inter-operations in a smart educational environment. The smart campus approach is presented as a composition of ambient learning spaces, which are environments where physical learning resources are augmented with digital and social services. We present a model of these spaces to harness future ubiquitous learning environments. One of the distinguished features of this model is the ability to unleash the instructional value of surrounding physical structures. Another one is the provision of a personalized learning agenda when moving across these ambient learning environments. To achieve these goals, we profile learners and augment physical campus structures to advocate context-aware learning processes. We suggest a social community platform for knowledge sharing which involves peer learners, domain experts as well as campus physical resources. Within this pervasive social scope, learners are continuously immersed in a pedagogically supported experiential learning loop as a persuasive approach to learning. A learning path, which responds to learners’ goals and qualifications, autonomously guides learners in achieving their objectives in the proposed smart campus. We evaluated our ubiquitous learning approach to assert the performance of these building blocks in the proposed smart campus model. The results show interesting tradeoffs and promising insights.

  • 222.
    Atif, Yacine
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Stylianos, Sergis
    University of Piraeus, Athens, Greece.
    Demetrios, Sampson
    Curtin University, Perth, Australia.
    Mathiason, Gunnar
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A Cyberphysical Learning Approach for Digital Smart Citizenship Competence Development2017In: WWW '17: Proceedings of the 26th International Conference on World Wide Web Companion, ACM Digital Library, 2017, p. 397-405Conference paper (Refereed)
    Abstract [en]

    Smart Cities have emerged as a global concept that argues for the effective exploitation of digital technologies to drive sustainable innovation and well-being for citizens. Despite the large investments being placed on Smart City infrastructure, however, there is still very scarce attention on the new learning approaches that will be needed for cultivating Digital Smart Citizenship competences, namely the competences which will be needed by the citizens and workforce of such cities for exploiting the digital technologies in creative and innovative ways for driving financial and societal sustainability. In this context, this paper introduces cyberphysical learning as an overarching model of cultivating Digital Smart Citizenship competences by exploiting the potential of Internet of Things technologies and social media, in order to create authentic blended and augmented learning experiences.

  • 223.
    Atif, Yacine
    et al.
    UAE University, United Arab Emirates.
    Zhang, Liren
    UAE University, Univted Arab Emirates.
    Network Resource Management in Support of QoS in Ubiquitous Learning2014In: Journal of Network and Computer Applications, ISSN 1084-8045, E-ISSN 1095-8592, Vol. 41, p. 148-156Article in journal (Refereed)
    Abstract [en]

    Ubiquitous learning involves a large-scale service network organized as a social infrastructure. These environments weave together context service dissemination, learner profiling as well as autonomic control of the induced network traffic. The objective of the research presented in this paper is to derive a Quality of Service aware model of ubiquitous learning services based on typical learning schemes. These pedagogical patterns are designed to match various learning situations in terms of learning context, learner profile and network infrastructure. They particularly represent classes of services in ubiquitous learning environments to prioritize traffic so that less important traffic does not consume network bandwidth and slow down or halt the delivery of more important traffic. We analyze formally and empirically the network traffic requirements of a proposed learning service quality controller to support providers of learning services allocating resources in a pervasive learning environment.

  • 224.
    Auer, Jens
    University of Skövde, School of Humanities and Informatics.
    Metaheuristic Multiple Sequence Alignment Optimisation2004Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [sv]

    The ability to tackle NP-hard problems has been greatly extended by the introduction of Metaheuristics (see Blum & Roli (2003)) for a summary of most Metaheuristics, general problem-independent optimisation algorithms extending the hill-climbing local search approach to escape local minima. One of these algorithms is Iterated Local Search (ILS) (Lourenco et al., 2002; Stützle, 1999a, p. 25ff), a recent easy to implement but powerful algorithm with results comparable or superior to other state-of-the-art methods for many combinatorial optimisation problems, among them the Traveling Salesman (TSP) and Quadratic Assignment Problem (QAP). ILS iteratively samples local minima by modifying the current local minimum and restarting

    a local search porcedure on this modified solution. This thesis will show how ILS can be implemented for MSA. After that, ILS will be evaluated and compared to other MSA algorithms by BAliBASE (Thomson et al., 1999), a set of manually refined alignments used in most recent publications of algorithms and in at least two MSA algorithm surveys. The runtime-behaviour will be evaluated using runtime-distributions.

    The quality of alignments produced by ILS is at least as good as the best algorithms available and significantly superiour to previously published Metaheuristics for MSA, Tabu Search and Genetic Algorithm (SAGA). On the average, ILS performed best in five out of eight test cases, second for one test set and third for the remaining two. A drawback of all iterative methods for MSA is the long runtime needed to produce good alignments. ILS needs considerably less runtime than Tabu Search and SAGA, but can not compete with progressive or consistency based methods, e. g. ClustalW or T-COFFEE.

  • 225.
    Augustsson, Christian
    et al.
    University of Skövde, School of Informatics.
    Egeberg Jacobson, Pontus
    University of Skövde, School of Informatics.
    Scherqvist, Erik
    University of Skövde, School of Informatics.
    Evaluating Machine Learning Intrusion Detection System classifiers: Using a transparent experiment approach2019Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    There have been many studies performing experiments that showcase the potential of machine learning solutions for intrusion detection, but their experimental approaches are non-transparent and vague, making it difficult to replicate their trained methods and results. In this thesis we exemplify a healthier experimental methodology.

    A survey was performed to investigate evaluation metrics. Three experiments implementing and benchmarking machine learning classifiers, using different optimization techniques, were performed to set up a frame of reference for future work, as well as signify the importance of using descriptive metrics and disclosing implementation.

    We found a set of metrics that more accurately describes the models, and we found guidelines that we would like future researchers to fulfill in order to make their work more comprehensible. For future work we would like to see more discussion regarding metrics, and a new dataset that is more generalizable.

  • 226.
    Augustsson, Fredrik
    University of Skövde, Department of Computer Science.
    Varför väljer företag/organisationer att använda en Application Service Provider (ASP)?2001Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Outsourcing är en företeelse som, trots att den egentligen är relativt gammal, fått sitt genombrott under 1990-talet. En Application Service Provider (ASP) är en ny typ av företag som bygger vidare på konceptet för outsourcing. Genom att anlita en ASP kan ett företag/organisation få tillgång till applikationer utan att behöva köpa licenser eller hårdvara.

    Det finns flera anledningar till att ett företag/organisation väljer att använda sig av ASP. Genom att intervjua företag/organisationer som använder ASP har en undersökning gjorts om vilka anledningar, så kallade faktorer, som varit avgörande då beslutet att anlita en ASP togs. Utgångspunkten för undersökningen har varit anledningar som ASP-marknaden och dess analytiker menar är orsaker till att ASP väljs. Resultatet av undersökningen visar att de faktorer företagen uppgett varit avgörande för beslutet att anlita en ASP i stor utsträckning överensstämmer med de kända anledningar ASP-marknaden och dess analytiker presenterat.

  • 227.
    Augustsson, Martin
    University of Skövde, School of Humanities and Informatics.
    Argumentera för den agila metoden: Att stärka argumentationen till beställaren i förespråkandet av agil projektmetodik2011Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Syftet med arbetet är att identifiera svårigheter med att argumentera för den agila projektmetodiken till en beställare. Arbetet har även till syfte att ge rekommendationer på hur en organisation kan stärka sin argumentation för den agila metoden ut mot beställaren. För att uppnå arbetets syfte har den kvalitativ forskningsintervju och en litteraturgenomgång tillämpats. Resultatet visade att svårigheterna är att alla yrkesroller internt inom organisationen inte har en och samma definition över vad den agila metoden innebär. Den nuvarande agila modellen ansågs också av flertalet respondenter inte vara tillräckligt utarbetad. Det behövs utbildning, engagemang och en skräddarsydd prissättningsmodell som är anpassad efter den agila metoden för att stärka argumentationen om val av den agila projektmetodiken.

  • 228.
    Aulenius, Göran
    University of Skövde, School of Humanities and Informatics.
    Användandet av IT-strategi, för- och nackdelar.2004Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Informationsteknik (IT) är en marknad som förändras snabbt. Att investera i IT kan därför vara kritiskt. Att ha en strategi för hur satsningar på IT ska göras kan minska risken för felinvesteringar på IT men strategin kan även ge andra fördelar. Att ha en IT-strategi innebär dock inte automatiskt att den ger fördelar. IT-strategin bör även användas. Det finns nämligen organisationer som har en IT-strategi men som inte använder den. Det viktiga är inte att ha en IT-strategi utan snarare hur den används.

    Syftet med studien är att berika kunskapen om hur en IT-strategi bör användas samt att ge en bild av vilka för- och nackdelar användandet av en IT-strategi kan ge. För att kunna erhålla kunskap om detta har intervjuer med organisationer som har en IT-strategi genomförts. Resultatet visar på att en IT-strategi bör användas som underlag vid diskussion för att bidra med hjälp till problemlösning. IT-strategin bör inte ses som en problemlösare i sig. Vidare visar resultatet att användandet av en IT-strategi kan ge nackdelar, men att det inte gör det för de intervjuade organisationerna. Däremot visar resultatet att användandet av en IT-strategi ger en del fördelar. Fördelar i form av att det blir ett stöd i arbetet, det ger en tydlighet, det underlättar beslutsprocessen samt att det skapar säkrare investeringar på IT.

  • 229.
    Awe, Julius Adebayo
    et al.
    University of Skövde, School of Life Sciences. University of Skövde, The Systems Biology Research Centre. University of Manitoba, CancerCare Manitoba, Canada / Sahlgrenska Academy, University of Gothenburg, Sweden .
    Xu, Mark Chu
    University of Manitoba, CancerCare Manitoba, Canada .
    Wechsler, Janine
    ScreenCell, Paris, France / Hôpital Henri Mondor, Créteil, France .
    Benali-Furet, Naoual
    ScreenCell, Paris, France.
    Cayre, Yvon E
    ScreenCell, Paris, France / Hôpital Robert Debré and Pierre, Marie Curie University, Paris, France .
    Saranchuk, Jeff
    University of Manitoba, Canada .
    Drachenberg, Darrel
    University of Manitoba, Canada .
    Mai, Sabine
    University of Manitoba, CancerCare Manitoba, Canada .
    Three-Dimensional Telomeric Analysis of Isolated Circulating Tumor Cells (CTCs) Defines CTC Subpopulations2013In: Translational Oncology, ISSN 1944-7124, E-ISSN 1936-5233, Vol. 6, no 1, p. 51-65Article in journal (Refereed)
    Abstract [en]

    Circulating tumor cells (CTCs) have been identified with the potential to serve as suitable biomarkers for tumor stage and progression, but the availability of effective isolation technique(s) coupled with detailed molecular characterization have been the challenges encountered in making CTCs clinically relevant. For the first time, we combined isolation of CTCs using the ScreenCell filtration technique with quantitative analysis of CTC telomeres by TeloView. This resulted in the identification and molecular characterization of different subpopulations of CTCs in the same patient. Three-dimensional (3D) telomeric analysis was carried out on isolated CTCs of 19 patients that consisted of four different tumor types, namely, prostate, colon, breast, melanoma, and one lung cancer cell line. With telomeric analysis of the filter-isolated CTCs, the level of chromosomal instability (CIN) of the CTCs can be determined. Our study shows that subpopulations of CTCs can be identified on the basis of their 3D telomeric properties.

  • 230.
    Axelsson, K. F.
    et al.
    Department of Orthopaedic Surgery, Skaraborg Hospital, Skövde, Sweden / Geriatric Medicine, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden.
    Wallander, M.
    Geriatric Medicine, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden / Department of Medicine Huddinge, Karolinska Institute, Stockholm, Sweden.
    Johansson, H.
    Institute for Health and Ageing, Catholic University of Australia, Melbourne, Vic., Australia.
    Lundh, Dan
    University of Skövde, School of Health and Education. University of Skövde, Health and Education.
    Lorentzon, M.
    Geriatric Medicine, Department of Internal Medicine and ClinicalNutrition, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden / Geriatric Medicine, Sahlgrenska University Hospital, Mölndal, Sweden.
    Hip fracture risk and safety with alendronate treatment in the oldest-old2017In: Journal of Internal Medicine, ISSN 0954-6820, E-ISSN 1365-2796, Vol. 282, no 6, p. 546-559Article in journal (Refereed)
    Abstract [en]

    Background. There is high evidence for secondary prevention of fractures, including hip fracture, with alendronate treatment, but alendronate's efficacy to prevent hip fractures in the oldest-old (80 years old), the population with the highest fracture risk, has not been studied. Objective. To investigate whether alendronate treatment amongst the oldest-old with prior fracture was related to decreased hip fracture rate and sustained safety. Methods. Using a national database of men and women undergoing a fall risk assessment at a Swedish healthcare facility, we identified 90 795 patients who were 80 years or older and had a prior fracture. Propensity score matching (four to one) was then used to identify 7844 controls to 1961 alendronate-treated patients. The risk of incident hip fracture was investigated with Cox models and the interaction between age and treatment was investigated using an interaction term. Results. The case and control groups were well balanced in regard to age, sex, anthropometrics and comorbidity. Alendronate treatment was associated with a decreased risk of hip fracture in crude (hazard ratio (HR) 0.62 (0.49-0.79), P < 0.001) and multivariable models (HR 0.66 (0.51-0.86), P < 0.01). Alendronate was related to reduced mortality risk (HR 0.88 (0.82-0.95) but increased risk of mild upper gastrointestinal symptoms (UGI) (HR 1.58 (1.12-2.24). The alendronate association did not change with age for hip fractures or mild UGI. Conclusion. In old patients with prior fracture, alendronate treatment reduces the risk of hip fracture with sustained safety, indicating that this treatment should be considered in these high-risk patients.

  • 231.
    Axelsson, Olle
    University of Skövde, School of Informatics.
    Diegetiska och spatiala UI-element i speltutorials: Hur immersion och lärbarhet påverkas av olika typer av UI i ett VR-spels tutorial2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Tutorial kallas ofta delen i början av ett spel där spelaren lär sig hur spelet fungerar. Utformningen av detta segment, som ofta innehåller en kombination av träning i spelmekanik och inledning till spelets berättelse, utgör ofta en utmaning för speldesigners. I tutorial-delen av VR-spelet Budget Cuts har utvecklarna använt sig av så kallade spatiala UI-element för att förmedla instruktioner och information till spelaren. Man har från utvecklarnas sida sett vissa brister i lärbarhet och immersion. Det har föreslagits att en förflyttning av UI-element till ett diegetiskt plan, d.v.s. där dessa får en naturlig placering och del i spelets fiktion, kan ha en positiv effekt på immersionsnivån och lärbarheten. En ny version av spelets tutorial har utvecklats för att undersöka detta antagande. Genom användbarhetstestning och jämförelse av den nya och tidigare versionen, har detta visats stämma.

  • 232.
    Axelsson, Peter
    University of Skövde, School of Humanities and Informatics.
    Emotioner i spel: Hur emotioner påverkar spelupplevelsen2010Independent thesis Basic level (degree of Bachelor), 30 credits / 45 HE creditsStudent thesis
    Abstract [sv]

    Gör emotioner en spelupplevelse bättre? Jämfört med äldre narrativa medier såsom film och skönlitteratur är spelbranschen ung och anses på många sätt vara mindre sofistikerad ifråga om emotionellt djup. Spel har, till skillnad från film där emotioner väcks genom empati med karaktärer, ofta ett förstapersonsperspektiv vilket gör det lättare att förbättra spelupplevelsen genom att väcka emotioner hos spelaren direkt. I detta arbete syftar emotioner på de av djupare slag som traditionellt sett varit sällsynta inom spel då dessa ofta är primärt gameplaydrivna. Verktyg för att förändra ett spel till att bättre väcka emotioner existerar i form av sätt att skriva vilket gör karaktärer, handling och dialograder djupare och mer intressanta. För att testa om detta verkligen gör en spelupplevelse bättre framställs två versioner av ett spel, en version med grundläggande dialog och en där dessa verktyg applicerats. I övrigt är spelen identiska. Därefter testas spelen på en försöksgrupp och spelupplevelsen mäts. En analys av mätningarna visar att försökspersonerna över lag hade en bättre spelupplevelse av spelet som hade bearbetats med hjälp av verktygen jämfört med gruppen som fick spela den enkla versionen.

  • 233.
    Axelsson, Peter
    University of Skövde, Department of Computer Science.
    Hur kan XML underlätta e-handel?2000Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Detta examensarbete har inriktats mot XML och dess användning på Internet. Frågeställningen lyder: "Kan underhållet av presenterad information på WWW förbättras eller förenklas med hjälp av XML för ett e-handelsföretag?" Det som förväntades av detta arbete är att se om XML kan ersätta HTML och underlätta för personalen vid uppdateringar av e-handelsplatsen. Bakgrunden till arbetet är att underhållet av en webbhandelsplats i dagens läge kräver mycket manuellt arbete och kostar mycket pengar. Går det att minska det manuella arbetet kan pengar sparas. Till grund för arbetet ligger en litteraturstudie.

    Kortfattat var resultatet följande:

    ·Kraven på serverprestanda kan sänkas m.h.a. XML.

    ·Tiden som läggs på uppdateringar av innehåll och utseende av webbplatser kan minskas.

    ·Kopplingen mellan befintligt affärssystem och webbhandelplats kan förenklas.

    ·Svaret på problemformuleringen är ja. XML ger ovan nämnda förbättringar och detta motiverar till att byta från ett HTML-baserat system till ett XML-baserat.

  • 234.
    Axelsson, Thomas
    University of Skövde, School of Humanities and Informatics.
    Långa skuggor med shadow maps2011Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Skuggor i 3D-miljöer är ett mycket efterforskat område, och detta arbete koncentrerar sig på shadow map-algoritmen. Det finns ett problem med denna algoritm, för då en shadow map projiceras på en yta som är större än sig själv så bildas stora trappstegseffekter, vilket kallas aliasing. Problemet som har undersökts är hur olika shadow map-algoritmer i en miljö med långa skuggor beter sig, där ett minimerat antal artefakter så som brus och aliasing är synligt. För detta undersöktes Percentage-Closer Filtering (PCF), som är en variant av shadow map, med olika samplingstekniker – och även en vidarebyggnad med Percentage-Closer Soft Shadow (PCSS) implementerades. Mätningar av realism och brusmängd genomfördes med en användarstudie. Prestandan mättes i klockcykler. Resultatet visade att PCF med samplingstekniken Edge Tap Smoothing kan vara den algoritm som lämpar sig bäst i situationer med långa skuggor i en 3D-miljö; detta för att den interpolerar mellan de projicerade texlarna.

  • 235.
    Axelsson, Tord
    University of Skövde, School of Humanities and Informatics.
    Realtidssimulering av vätskor i datorspel mha partikelsystem2007Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Vätskor känns självklara och naturliga i vår vardag men de kan vara ganska komplexa och svår att simulera i exempelvis ett datorspel. Ett verklighetstroget vattenstänk i ett spel kan absolut ge en ökad realism i spelet och ge en förhöjd spelupplevelse.

    Detta arbete undersöker en teknik för att få en mer verklighetstrogen rörelse/beteende hos en vätska. Metoden bygger på att lösa Navier-Stokes algoritm som beskriver vätskors beteende på molekylär nivå, och beräkna en interaktion mellan partiklarna som representerar vätskan.

    Resultaten visar att en mer realistisk rörelse går att få fram jämfört med vad man kan få med ett enklare partikelsystem, men att antalet partiklar blir mycket begränsade. Prestanda hos datorer ökar ständigt och inom en snar framtid genom en utveckling av teknikern och närliggande metoder så kan den bli helt klart aktuell i nästa generations datorspel.

  • 236.
    Aziz, Tariq
    University of Skövde, School of Humanities and Informatics.
    Impact of information fusion in complex decision making2011Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In military battlefield domain, decision making plays a very important part because safety and protection depends upon the accurate decisions made by the commanders in complex situations. In military and defense applications, there is a need of such technology that helps leaders to take good decisions in the critical situations with information overload. With the help of multi-sensor information fusion, the amount of information can be reduced as well as uncertainties in the information in the decision making of identifying and tracking targets in the military area.

     

    Information fusion refers to the process of getting information from different sources and fusing this information, to supply an enhanced decision support. Decision making is the very core and a vital part in the field of information fusion and better decisions can be obtained by understanding how situation awareness can be enhanced. Situation awareness is about understanding the elements of the situation i.e. circumstances of the surrounding environment, their relations and their future impacts, for better decision making. Efficient situation awareness can be achieved with the effective use of the sensors. Sensors play a very useful role in the multi-sensor fusion technology to collect the data about, for instance, the enemy regarding their movements across the border and finding relationships between different objects in the battlefield that helps the decision makers to enhance situation awareness.

     

    The purpose of this thesis is to understand and analyze the critical issue of uncertainties that results information in overload in military battlefield domain and benefits of using multi-sensor information fusion technology to reduce uncertainties by comparing uncertainty management methods of Bayesian and Dempster Shafer theories to enhance decision making and situation awareness for identifying the targets in battlefield domain.

  • 237.
    Baalsrud Hauge, Jannicke Madeleine
    et al.
    University of Bremen, Bremer Institut für Produktion und Logistik, Germany.
    Stanescu, Ioana
    Carol I National Defence University, Romania.
    Arnab, Sylvester
    Disruptive Media Learning Lab, Coventry University, UK.
    Moreno Ger, Pablo
    Universidad Complutense de Madrid, Spain.
    Lim, Theodore
    Herriot-Watt University, UK.
    Serrano-Laguna, Angel
    Universidad Complutense de Madrid, Spain.
    Lameras, Petros
    Serious Games Institute, Coventry University, UK.
    Hendrix, Maurice
    School of Science and Technology, University of Northampton, UK.
    Kiili, Kristian
    Tampere University of Technology, Finland.
    Ninaus, Manuel
    University of Graz, Austria.
    de Freitas, Sara
    Curtin University, Australia.
    Mazzetti, Alessandro
    Gruppo SIGLA S.r.l, Italy.
    Dahlbom, Anders
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Degano, Cristiana
    Gruppo SIGLA S.r.l, Italy.
    Learning Analytics Architecture to Scaffold Learning Experience through Technology-based Methods2015In: International Journal of Serious Games, ISSN 2384-8766, Vol. 2, no 1, p. 29-44Article in journal (Refereed)
    Abstract [en]

    The challenge of delivering personalized learning experiences is often increased by the size of classrooms and online learning communities. Serious Games (SGs) are increasingly recognized for their potential to improve education. However, the issues related to their development and their level of effectiveness can be seriously affected when brought too rapidly into growing online learning communities. Deeper insights into how the students are playing is needed to deliver a comprehensive and intelligent learning framework that facilitates better understanding of learners' knowledge, effective assessment of their progress and continuous evaluation and optimization of the environments in which they learn. This paper discusses current SOTA and aims to explore the potential in the use of games and learning analytics towards scaffolding and supporting teaching and learning experience. The conceptual model (ecosystem and architecture) discussed in this paper aims to highlight the key considerations that may advance the current state of learning analytics, adaptive learning and SGs, by leveraging SGs as an suitable medium for gathering data and performing adaptations.

  • 238.
    Babar, Muhammad Ali
    et al.
    University of Limerick, Ireland.
    Fitzgerald, Brian
    Lero, University of Limerick, Ireland.
    Ågerfalk, Pär J.
    Lero, University of Limerick, Ireland / Uppsala University.
    Lundell, Björn
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Thiel, Steffen
    Lero, University of Limerick, Ireland.
    On the Importance of Sound Architectural Practices in the Use of OSS in Software Product Lines2007In: Proceedings of the 2nd International Workshop on Open Source Software and Product Lines (OSSPL 2007), collocated with the 11th International Software Product Line Conference (SPLC 2007), Kyoto, Japan, September 10-14, 2007 / [ed] Frank van der Linden, Björn Lundell, Cosi , 2007, p. 25-32Conference paper (Refereed)
    Abstract [en]

    Software Product Line (SPL) and Open Source Software (OSS) haveemerged as successful modes of developing software. Although they appear todiffer in terms of development principles and processes, researchers andpractitioners have been increasingly emphasising the need to achieve synergiesby exploiting the ever growing repositories of OSS components for developingSPLs. While there have been calls for the SPL community to accelerate thewidespread use of OSS in SPL, less attention has been paid to how OSScommunities could increase the use of OSS components in SPL. Sincearchitectural issues are considered critical in the SPL community, we proposethat an increased attention on architectural aspects of OSS components mayprovide the confidence that organizations need in order for them to choose anduse OSS components in SPL. We identify a number of architectural practiceswhich are followed by the SPL community and discuss the possibilities for andpotential benefits of incorporating those practices in OSS developmentprocesses.

  • 239.
    Babar, Muhammad Ali
    et al.
    Lero, Ireland.
    Lundell, Björn
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    van der Linden, Frank
    Philips Healthcare, Netherlands.
    A Joint Workshop of QACOS and OSSPL2009In: Open source ecosystems: Diverse communities interacting / [ed] Cornelia Boldyreff, Kevin Crowston, Björn Lundell, Anthony I. Wasserman, Springer, 2009, p. 357-358Conference paper (Refereed)
  • 240. Babar, Muhammad Ali
    et al.
    Lundell, BjörnUniversity of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.van der Linden, Frank
    QACOS-OSSPL 2009: Proceedings of the Joint Workshop on Quality and Architectural Concerns in Open Source Software (QACOS) and Open Source Software and Product Lines (OSSPL)2009Conference proceedings (editor) (Other academic)
  • 241.
    Back, Jesper
    University of Skövde, School of Informatics.
    Återanvändning av spelobjekt och dess påverkan på spelupplevelsen: En studie om originalitet i spelmiljöer2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Att återanvända spelobjekt är i dagsläget någon som ständigt används i spelproduktion. Återanvändningen är grundläggande för att effektivt kunna producera spel och hinna skapa grafiska resurser i tid. Men att se samma träd flera gånger i en skog gör man ju inte i verkligheten, är det inte möjligt att denna återanvändning påverkar spelarens upplevelse av spelvärlden? För att undersöka detta har en serie deltagare fått utvärdera sin upplevelse av två olika spelvärldar, en med hög grad av återanvändning och en med så sparsam återanvändning som möjligt. Genom att jämföra dessa upplevelser visade det sig att spelare generellt har svårt att upptäcka eller avgöra om en miljö återanvänder spelobjekt i hög utsträckning eller inte. Generell kvalitet av de spelobjekt som existerar verkar vara av större vikt än mångfald och variation. En tydligare koppling mellan återanvändningens påverkan och spelets genre samt precisering av eventuella minimiantal unika objekt av olika typer skulle kunna vara föremål för vidare studier i ämnet.

  • 242.
    Backlund, Alexander
    University of Skövde, Department of Computer Science.
    CASE-verktyg och hypertext: att hantera anteckningar1998Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    I detta arbete har jag försökt att besvara frågan om hur hypertext kan nyttjas för att förbättra hanteringen av anteckningar i UCASE-verktyg. Detta har inte minst varit motiverat av de goda erfarenheter andra forskare har haft av CASE-verktyg med hypertextfunktionalitet.

    För att kunna besvara frågan har jag först utarbetat ett ramverk med krav på hanteringen av anteckningar i CASE-verktyg utifrån bl. a. anteckningarnas och dokumentationens roll i systemutvecklingsprocessen.

    Detta ramverk har sedan använts för att utvärdera två UCASE-verktygs hantering av anteckningar. Utifrån denna utvärdering har sedan möjliga förbättringar föreslagits.

    Som ett resultat av detta har jag funnit att det sannolikt finns vissa brister i UCASE-verktygs hantering av anteckningar. Inte minst förefaller möjligheten att koppla anteckningar till andra anteckningar och objekt i modeller att vara begränsad. Jag har därför föreslagit att sådan funktionalitet ska införas med hjälp av hypertext.

  • 243.
    Backlund, Alexander
    University of Skövde, Department of Computer Science.
    The Application of Living Systems Theory to the Analysis of Organisations1999Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [sv]

    Living systems theory provides a conceptual model the use of which might help to improve the understanding of an organisation and its problems, thus helping analysts to find solutions to these problems. A method to guide the application of living systems theory to the analysis of organisations is needed. In this work, a number of methods based on living systems theory are analysed, and a method for analysing organisations that consists of nine steps based on fundamental living systems theory concepts and, to some extent, the aforementioned methods is proposed. The steps of the method range from the initial problem, i. e. the reason to undertake the analysis, to the evaluation of the final solution. The method is iterative - the analyst will have to go back and forth between the steps of the method - and is also supposed to be continually applied. Together with this method a number of description techniques are proposed. Several of these description techniques are graphical, which will hopefully enhance readability and maintainability.

  • 244.
    Backlund, Per
    University of Skövde, School of Humanities and Informatics.
    Development Process Knowledge Transfer through Method Adaptation, Implementation, and Use2004Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Information Systems Engineering (ISE) is an interdisciplinary approach to enable the realisation of successful information systems in a broad sense. ISE comprises a number of areas of expertise that must be integrated and managed in order to build information systems. Since ISE is becoming progressively more complex there is an increasing need to codify and manage knowledge within and about the ISE process.

    From a knowledge perspective the different model types created in an ISE project are examples of codified knowledge about the future system. The descriptions of how work should proceed are examples of codified knowledge of the process of creating the system. In summary, one of the main concerns in the ISE process is to manage the substantial amount of knowledge associated with the process as such as well as with the target domain of the actual development project and the developed software.

    In the thesis I recognise three areas of knowledge in ISE: development process knowledge, target domain knowledge, and software knowledge. Furthermore, I use a set of knowledge perspectives in order to describe and analyse ISE from a knowledge perspective. Finally, I introduce three aspects: organisation, artefact, and individual in order to be able to discuss and analyse how methods are actually used in organisations and how they affect the work situation.

    The results are presented in the form of a framework for knowledge transfer in ISE that comprises the knowledge perspective, the knowledge area, and the aspect of knowledge transfer. The framework is thus used to analyse the results from the six papers enclosed in the thesis. The results also comprise an empirical characterisation of a method in use which is based on data collected during an ethnographical study. Finally the results are made concrete in the form of a pattern collection for method introduction and method use.

  • 245.
    Backlund, Per
    University of Skövde, School of Humanities and Informatics.
    Introducing New IT Project Management Practices: a Case Study2004In: AMCIS 2004 Proceedings, 2004, p. 784-792Conference paper (Refereed)
    Abstract [en]

    The increasing complexity of information systems development (ISD) projects calls for improved project management practices. This, together with an endeavor to improve the success rate of ISD projects, has served as drivers for various efforts in process improvement such as the introduction of new development methods. An ISD method may be perceived as a means for managing projects. Commercial development methods are typically combined with in-house methods for managing parts of the development process. In this paper we investigate in what way in-house methods and commercial methods are combined and used in an ISD project. In order to get a better understanding for how these issues are actually dealt with in the daily work, we have followed a project with a focus on how the group and the individuals implement the managerial decision to introduce a new development method.

  • 246.
    Backlund, Per
    University of Skövde, School of Humanities and Informatics.
    ISD as Knowledge Work: An Analysis of How a Development Method is Used in Practice2005In: Information Systems Development: Advances in Theory, Practice,and Education / [ed] Olegas Vasilecas, Wita Wojtkowski, Jože Zupančič, Albertas Caplinskas, W. Gregory Wojtkowski, Stanisław Wrycza, New York: Springer Science+Business Media B.V., 2005, p. 125-136Conference paper (Refereed)
  • 247.
    Backlund, Per
    University of Skövde, Department of Computer Science.
    Systemutvecklingsmetoder ur ett inlärningsperspektiv1999Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Det går att se på en systemutvecklingsmetod på olika sätt. Dels kan man studera den utifrån dess beståndsdelar, och dels kan man studera de processer i utvecklingsarbetet som leder fram till slutresultatet. I detta examensarbete diskuteras en del av de kognitiva krav som ställs vid inlärning av en systemutvecklingsmetod.

    Inom ramen för en litteraturstudie diskuteras vad som är viktigt att lyfta fram när en systemutvecklingsmetod ska presenteras och vilka inlärningsproblem som finns i samband med detta.

    Rapporten innehåller även en fallstudie där en systemutvecklingsmetod (Enterprise Knowledge Development) presenteras i HTML-format i en så kallad Electronic Guide Book. Examensarbetets bidrag till EGB består i att ge exempel på hur valda delar av EKD kan presenteras i HTML-format.

  • 248.
    Backlund, Per
    University of Skövde, Department of Computer Science.
    The Use of Patterns in Information System Engineering2001Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    The aims of this dissertation are to investigate the use and usefulness of patterns in Information Systems Engineering and to identify future areas of research. In order to do this there is a need to survey different types of patterns and find a common concept of patterns. A pattern is based on experience found in the real world. A text or a model or a combination of the both can describe the pattern. A pattern is typically described in terms of context, forces, problem, and solution. These can be explicitly expressed or implicitly found in the description of the pattern.

    The types of patterns dealt with are: object-oriented patterns; design patterns, analysis patterns; data model patterns; domain patterns; business patterns; workflow patterns and the deontic pattern. The different types of patterns are presented using the authors' own terminology.

    The patterns described in the survey are classified with respect to different aspects. The intention of this analysis is to form a taxonomy for patterns and to bring order into the vast amount of patterns. This is an important step in order to find out how patterns are used and can be used in Information Systems Engineering. The aspects used in the classification are: level of abstraction; text or model emphasis; product or process emphasis; life cycle stage usage and combinations of these aspects.

    Finally an outline for future areas of research is presented. The areas that have been considered of interest are: patterns and Information Systems Engineering methods; patterns and tools (tool support for patterns); patterns as a pedagogical aid; the extraction and documentation of patterns and patterns and novel applications of information technology. Each future area of research is sketched out.

  • 249.
    Backlund, Per
    et al.
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Alklind Taylor, Anna-Sofia
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Carlén, Urban
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Engström, Henrik
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Johannesson, Mikael
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Lebram, Mikael
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Toftedahl, Marcus
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Tactical Incident Commander - an Online Training Game for Incident Commander Training2011In: Proceedings of the 5th European Conference on Game Based Learning (ECGBL 2011) / [ed] D. Gouscos, M. Meimaris, Academic Conferences Limited, 2011, p. 9-17Conference paper (Refereed)
    Abstract [en]

    This paper presents an online training game for incident commanders to enact and create incident scenarios. The incident commander is the person in command on site when a rescue team is dispatched to a fire emergency. The challenge we are addressing in this work is to design a game and a game-based training process which can be used to support the change of work practice of fire fighters to become incident commanders (i.e. taking on a new professional role). The incident commander training game consists of two integrated parts: the IT artifact and the usage process. The two are integrated to provide necessary support for incident commander training via distance learning. The game is online and comprises three modules: The scenario player; the scenario creator, and; the log tool. The game and its pedagogical usage procedure are based on the theories of communities of practice and experiential learning. The novelty of this application lies in the combination of pedagogical theory and a specifically designed game. In comparison to other games for accident management training, the possibility for domain experts lacking of game design skills to create scenarios is an essential feature. Furthermore, the underlying fire simulation renders better "replayability" than a strictly branched scenario as the scenario creation is actually more of a process of setting conditions for the scenario than predicting each action of the player.

  • 250.
    Backlund, Per
    et al.
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Alklind Taylor, Anna-Sofia
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Engström, Henrik
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Johannesson, Mikael
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Lebram, Mikael
    University of Skövde, School of Humanities and Informatics. University of Skövde, The Informatics Research Centre.
    Slijper, Angelique
    Skaraborg Hospital, Department of Occupational Therapy and Physiotherapy, Skövde, Sweden.
    Svensson, Karin
    Skaraborg Hospital, Department of Occupational Therapy and Physiotherapy, Skövde, Sweden.
    Poucette, Jesper
    Skaraborg Primary Care, Ågårdsskogens Primary Care Centre, Lidköping, Sweden.
    Stibrant Sunnerhagen, Katharina
    The Sahlgrenska Academy, Institute of Neuroscience and Physiology, Section for Clinical Neuroscience and Rehabilitation, Göteborg, Sweden.
    Games on prescription!: Evaluation of the Elinor console for home-based stroke rehabilitation2013In: Transactions on Edutainment IX / [ed] Zhigeng Pan, Adrian David Cheok, Wolfgang Müller, Fotis Liarokapis, Springer Berlin/Heidelberg, 2013, p. 49-64Chapter in book (Refereed)
    Abstract [en]

    This paper reports the feasibility of Elinor, a game-based system for stroke rehabilitation in the home. The Elinor prototype has been positively evaluated with respect to its usability, user acceptance and motivational factors as well as its rehabilitation effect. This paper reports the findings from the whole project. To summarize the results, we find that game factors can be used to enhance motivation for rehabilitation. We had positive results with respect to many of the rehabilitation measurements employed. For example, the assessment of motor and process skills was positive as were also the self-reported improvements in daily activities. Furthermore, it seems that an increased self-efficacy with respect to the belief that the treatment can have an effect is positive and expected to increase motivation to undergo necessary rehabilitation. The usability and perceived usefulness of the system were also positively evaluated and the subjects expressed a positive attitude towards the system as well as a belief in its usefulness. © 2013 Springer-Verlag Berlin Heidelberg.

2345678 201 - 250 of 3529
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf