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  • 1001.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Aslam, Tehseen
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Deb, Kalyanmoy
    Department of Electrical and Computer Engineering, Michigan State University, East Lansing, USA.
    Generalized higher-level automated innovization with application to inventory management2015In: European Journal of Operational Research, ISSN 0377-2217, E-ISSN 1872-6860, Vol. 243, no 2, p. 480-496Article in journal (Refereed)
    Abstract [en]

    This paper generalizes the automated innovization framework using genetic programming in the context of higher-level innovization. Automated innovization is an unsupervised machine learning technique that can automatically extract significant mathematical relationships from Pareto-optimal solution sets. These resulting relationships describe the conditions for Pareto-optimality for the multi-objective problem under consideration and can be used by scientists and practitioners as thumb rules to understand the problem better and to innovate new problem solving techniques; hence the name innovization (innovation through optimization). Higher-level innovization involves performing automated innovization on multiple Pareto-optimal solution sets obtained by varying one or more problem parameters. The automated innovization framework was recently updated using genetic programming. We extend this generalization to perform higher-level automated innovization and demonstrate the methodology on a standard two-bar bi-objective truss design problem. The procedure is then applied to a classic case of inventory management with multi-objective optimization performed at both system and process levels. The applicability of automated innovization to this area should motivate its use in other avenues of operational research.

  • 1002.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Deb, Kalyanmoy
    BEACON Center for the Study of Evolution in Action, Department of Electrical and Computer Engineering, Michigan State University, USA.
    Metaheuristic Techniques2017In: Decision Sciences: Theory and Practice / [ed] Raghu Nandan Sengupta, Aparna Gupta, Joydeep Dutta, Boca Raton: CRC Press, 2017, p. 693-750Chapter in book (Refereed)
  • 1003.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Deb, Kalyanmoy
    Michigan State University, USA.
    Temporal Innovization: Evolution of Design Principles Using Multi-objective Optimization2015In: Proceedings of the 8th International Conference on Evolutionary Multi-Criterion Optimization (EMO 2015), Springer, 2015, Vol. 9018, p. 79-93Conference paper (Refereed)
    Abstract [en]

    Multi-objective optimization yields multiple solutions each of which is no better or worse than the others when the objectives are conflicting. These solutions lie on the Pareto-optimal front which is a lower-dimensional slice of the objective space. Together, the solutions may possess special properties that make them optimal over other feasible solutions. Innovization is the process of extracting such special properties (or design principles) from a trade-off dataset in the form of mathematical relationships between the variables and objective functions. In this paper, we deal with a closely related concept called temporal innovization. While innovization concerns the design principles obtained from the trade-off front, temporal innovization refers to the evolution of these design principles during the optimization process. Our study indicates that not only do different design principles evolve at different rates, but that they start evolving at different times. We illustrate temporal innovization using several examples.

  • 1004.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Gaur, Abhinav
    Department of Electrical and Computer Engineering, Michigan State University, USA.
    Deb, Kalyanmoy
    Department of Electrical and Computer Engineering, Michigan State University, USA.
    Khare, Vineet
    Amazon Development Centre (India) Pvt. Ltd., Bengaluru, India.
    Chougule, Rahul
    Department of Mechanical Engineering, Walchand College of Engineering, Sangli, India.
    Bandyopadhyay, Pulak
    General Motors R&D Center, Warren, USA.
    Development, analysis and applications of a quantitative methodology for assessing customer satisfaction using evolutionary optimization2015In: Applied Soft Computing, ISSN 1568-4946, E-ISSN 1872-9681, Vol. 30, p. 265-278Article in journal (Refereed)
    Abstract [en]

    Consumer-oriented companies are getting increasingly more sensitive about customer's perception of their products, not only to get a feedback on their popularity, but also to improve the quality and service through a better understanding of design issues for further development. However, a consumer's perception is often qualitative and is achieved through third party surveys or the company's recording of after-sale feedback through explicit surveys or warranty based commitments. In this paper, we consider an automobile company's warranty records for different vehicle models and suggest a data mining procedure to assign a customer satisfaction index (CSI) to each vehicle model based on the perceived notion of the level of satisfaction of customers. Based on the developed CSI function, customers are then divided into satisfied and dissatisfied customer groups. The warranty data are then clustered separately for each group and analyzed to find possible causes (field failures) and their relative effects on customer's satisfaction (or dissatisfaction) for a vehicle model. Finally, speculative introspection has been made to identify the amount of improvement in CSI that can be achieved by the reduction of some critical field failures through better design practices. Thus, this paper shows how warranty data from customers can be utilized to have a better perception of ranking of a product compared to its competitors in the market and also to identify possible causes for making some customers dissatisfied and eventually to help percolate these issues at the design level. This closes the design cycle loop in which after a design is converted into a product, its perceived level of satisfaction by customers can also provide valuable information to help make the design better in an iterative manner. The proposed methodology is generic and novel, and can be applied to other consumer products as well.

  • 1005.
    Bandaru, Sunith
    et al.
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Engineering Science.
    Ng, Amos
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Engineering Science.
    Deb, Kalyanmoy
    Department of Electrical and Computer Engineering, Michigan State University, East Lansing, USA.
    On the Performance of Classification Algorithms for Learning Pareto-Dominance Relations2014In: Proceedings of the 2014 IEEE Congress on Evolutionary Computation (CEC), IEEE Press, 2014, p. 1139-1146Conference paper (Refereed)
    Abstract [en]

    Multi-objective evolutionary algorithms (MOEAs)are often criticized for their high-computational costs. Thisbecomes especially relevant in simulation-based optimizationwhere the objectives lack a closed form and are expensive toevaluate. Over the years, meta-modeling or surrogate modelingtechniques have been used to build inexpensive approximationsof the objective functions which reduce the overall number offunction evaluations (simulations). Some recent studies however,have pointed out that accurate models of the objective functionsmay not be required at all since evolutionary algorithms onlyrely on the relative ranking of candidate solutions. Extendingthis notion to MOEAs, algorithms which can ‘learn’ Paretodominancerelations can be used to compare candidate solutionsunder multiple objectives. With this goal in mind, in thispaper, we study the performance of ten different off-the-shelfclassification algorithms for learning Pareto-dominance relationsin the ZDT test suite of benchmark problems. We considerprediction accuracy and training time as performance measureswith respect to dimensionality and skewness of the training data.Being a preliminary study, this paper does not include results ofintegrating the classifiers into the search process of MOEAs.

  • 1006.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    An empirical comparison of metamodeling strategies in noisy environments2018In: Proceedings of the Genetic and Evolutionary Computation Conference (GECCO-2018) / [ed] Hernan Aguirre, New York, NY, USA: ACM Digital Library, 2018, p. 817-824, article id 3205509Conference paper (Refereed)
    Abstract [en]

    Metamodeling plays an important role in simulation-based optimization by providing computationally inexpensive approximations for the objective and constraint functions. Additionally metamodeling can also serve to filter noise, which is inherent in many simulation problems causing optimization algorithms to be mislead. In this paper, we conduct a thorough statistical comparison of four popular metamodeling methods with respect to their approximation accuracy at various levels of noise. We use six scalable benchmark problems from the optimization literature as our test suite. The problems have been chosen to represent different types of fitness landscapes, namely, bowl-shaped, valley-shaped, steep ridges and multi-modal, all of which can significantly influence the impact of noise. Each metamodeling technique is used in combination with four different noise handling techniques that are commonly employed by practitioners in the field of simulation-based optimization. The goal is to identify the metamodeling strategy, i.e. a combination of metamodeling and noise handling, that performs significantly better than others on the fitness landscapes under consideration. We also demonstrate how these results carry over to a simulation-based optimization problem concerning a scalable discrete event model of a simple but realistic production line.

  • 1007.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    On the scalability of meta-models in simulation-based optimization of production systems2015In: 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, NJ: IEEE Press, 2015, p. 3644-3655Conference paper (Refereed)
    Abstract [en]

    Optimization of production systems often involves numerous simulations of computationally expensive discrete-event models. When derivative-free optimization is sought, one usually resorts to evolutionary and other population-based meta-heuristics. These algorithms typically demand a large number of objective function evaluations, which in turn, drastically increases the computational cost of simulations. To counteract this, meta-models are used to replace expensive simulations with inexpensive approximations. Despite their widespread use, a thorough evaluation of meta-modeling methods has not been carried out yet to the authors' knowledge. In this paper, we analyze 10 different meta-models with respect to their accuracy and training time as a function of the number of training samples and the problem dimension. For our experiments, we choose a standard discrete-event model of an unpaced flow line with scalable number of machines and buffers. The best performing meta-model is then used with an evolutionary algorithm to perform multi-objective optimization of the production model.

  • 1008.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Trend Mining: A Visualization Technique to Discover Variable Trends in the Objective Space2019In: Evolutionary Multi-Criterion Optimization: 10th International Conference, EMO 2019, East Lansing, MI, USA, March 10-13, 2019, Proceedings / [ed] Kalyanmoy Deb, Erik Goodman, Carlos A. Coello Coello, Kathrin Klamroth, Kaisa Miettinen, Sanaz Mostaghim, Patrick Reed, Cham, Switzerland: Springer, 2019, Vol. 11411, p. 605-617Conference paper (Refereed)
    Abstract [en]

    Practical multi-objective optimization problems often involve several decision variables that influence the objective space in different ways. All variables may not be equally important in determining the trade-offs of the problem. Decision makers, who are usually only concerned with the objective space, have a hard time identifying such important variables and understanding how the variables impact their decisions and vice versa. Several graphical methods exist in the MCDM literature that can aid decision makers in visualizing and navigating high-dimensional objective spaces. However, visualization methods that can specifically reveal the relationship between decision and objective space have not been developed so far. We address this issue through a novel visualization technique called trend mining that enables a decision maker to quickly comprehend the effect of variables on the structure of the objective space and easily discover interesting variable trends. The method uses moving averages with different windows to calculate an interestingness score for each variable along predefined reference directions. These scores are presented to the user in the form of an interactive heatmap. We demonstrate the working of the method and its usefulness through a benchmark and two engineering problems.

  • 1009.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Deb, Kalyanmoy
    Department of Electrical and Computer Engineering, Michigan State University, USA.
    Data mining methods for knowledge discovery in multi-objective optimization: Part A - Survey2017In: Expert systems with applications, ISSN 0957-4174, E-ISSN 1873-6793, Vol. 70, p. 139-159Article, review/survey (Refereed)
    Abstract [en]

    Real-world optimization problems typically involve multiple objectives to be optimized simultaneously under multiple constraints and with respect to several variables. While multi-objective optimization itself can be a challenging task, equally difficult is the ability to make sense of the obtained solutions. In this two-part paper, we deal with data mining methods that can be applied to extract knowledge about multi-objective optimization problems from the solutions generated during optimization. This knowledge is expected to provide deeper insights about the problem to the decision maker, in addition to assisting the optimization process in future design iterations through an expert system. The current paper surveys several existing data mining methods and classifies them by methodology and type of knowledge discovered. Most of these methods come from the domain of exploratory data analysis and can be applied to any multivariate data. We specifically look at methods that can generate explicit knowledge in a machine-usable form. A framework for knowledge-driven optimization is proposed, which involves both online and offline elements of knowledge discovery. One of the conclusions of this survey is that while there are a number of data mining methods that can deal with data involving continuous variables, only a few ad hoc methods exist that can provide explicit knowledge when the variables involved are of a discrete nature. Part B of this paper proposes new techniques that can be used with such datasets and applies them to discrete variable multi-objective problems related to production systems. 

  • 1010.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Deb, Kalyanmoy
    Department of Electrical and Computer Engineering, Michigan State University, USA.
    Data mining methods for knowledge discovery in multi-objective optimization: Part B - New developments and applications2017In: Expert systems with applications, ISSN 0957-4174, E-ISSN 1873-6793, Vol. 70, p. 119-138Article in journal (Refereed)
    Abstract [en]

    The first part of this paper served as a comprehensive survey of data mining methods that have been used to extract knowledge from solutions generated during multi-objective optimization. The current paper addresses three major shortcomings of existing methods, namely, lack of interactiveness in the objective space, inability to handle discrete variables and inability to generate explicit knowledge. Four data mining methods are developed that can discover knowledge in the decision space and visualize it in the objective space. These methods are (i) sequential pattern mining, (ii) clustering-based classification trees, (iii) hybrid learning, and (iv) flexible pattern mining. Each method uses a unique learning strategy to generate explicit knowledge in the form of patterns, decision rules and unsupervised rules. The methods are also capable of taking the decision maker's preferences into account to generate knowledge unique to preferred regions of the objective space. Three realistic production systems involving different types of discrete variables are chosen as application studies. A multi-objective optimization problem is formulated for each system and solved using NSGA-II to generate the optimization datasets. Next, all four methods are applied to each dataset. In each application, the methods discover similar knowledge for specified regions of the objective space. Overall, the unsupervised rules generated by flexible pattern mining are found to be the most consistent, whereas the supervised rules from classification trees are the most sensitive to user-preferences. 

  • 1011.
    Bandaru, Sunith
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Smedberg, Henrik
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    A parameterless performance metric for reference-point based multi-objective evolutionary algorithms2019In: GECCO '19: Proceedings of the Genetic and Evolutionary Computation Conference / [ed] Manuel López-Ibáñez, New York, NY, USA: ACM Digital Library, 2019, p. 499-506Conference paper (Refereed)
    Abstract [en]

    Most preference-based multi-objective evolutionary algorithms use reference points to articulate the decision maker's preferences. Since these algorithms typically converge to a sub-region of the Pareto-optimal front, the use of conventional performance measures (such as hypervolume and inverted generational distance) may lead to misleading results. Therefore, experimental studies in preference-based optimization often resort to using graphical methods to compare various algorithms. Though a few ad-hoc measures have been proposed in the literature, they either fail to generalize or involve parameters that are non-intuitive for a decision maker. In this paper, we propose a performance metric that is simple to implement, inexpensive to compute, and most importantly, does not involve any parameters. The so called expanding hypercube metric has been designed to extend the concepts of convergence and diversity to preference optimization. We demonstrate its effectiveness through constructed preference solution sets in two and three objectives. The proposed metric is then used to compare two popular reference-point based evolutionary algorithms on benchmark optimization problems up to 20 objectives.

    The full text will be freely available from 2020-08-01 00:00
  • 1012.
    Bander, Zerina
    et al.
    University of Skövde, School of Health and Education.
    Gac Allamand, Gabriel
    University of Skövde, School of Health and Education.
    Vänskap och kultur: En kvalitativ  studie om immigranters upplevelse av deras ackulturationsprocess med fokus på etniska vänskapsrelationer2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this study is to obtain a deeper understanding for how immigrants who migrated from Chile and Bosnia and Herzegovina and are residing in Sweden, experience their acculturation process in relation to their friendship relations’ ethnical background. The research focuses on immigrants’ subjective experience of their own acculturation process which is then analyzed with social psychological theories including Social exchange theory, Acculturation and Symbolic interactionism, together with concepts belonging to these theories. Through semi structured interviews, a result emerged which shows that the experienced acculturation has an influence on whom one chooses to establish a friendship relation with. The result shows that immigrants whos acculturation indicates towards integration in the host country tend to develop friendship ties with people of the ethnical majority population. Acculturation made clear in a feeling of separation and marginalization results in that the immigrant solely turns to friends belonging of the own ethnical country of birth. Furthermore, the result shows that language is the most contributory factor for integration, followed by work and schooling in the host country as other important contributory factors.

  • 1013.
    Banik, Kallol
    University of Skövde, School of Informatics.
    Investigation of Methods for Testing Aspect Oriented Software2014Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Aspect-oriented programming is a comparatively new programming paradigm which intends to overcome some limitations that approaches such as procedural programming and object-oriented programming have. Traditional approaches are unable to properly capture some design decisions. Aspect-oriented programming introduces some new properties that we don’t find in the structural programming or object-oriented programming. New design patterns of aspect-oriented software introduce new fault types and new challenges for testing. Testing is an important part in the software development to produce quality software. Research on testing aspect-oriented software has been going on for several years but it still remains to invent testing approaches that cover all features of aspect-oriented software. This dissertation surveys test methods for aspect-oriented software and presents a comparison among the testing methods which reveals the strengths and weaknesses of current methods for testing of aspect-oriented software. This comparative overview of proposed test methods can be helpful for testers who intend to test aspect-oriented software. The conclusion presents the research contribution of this dissertation and proposes future work.

  • 1014.
    Banila, Beatrice
    University of Skövde, School of Humanities and Informatics.
    Attention-deficit hyperactivity disorder, medication and substance abuse2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Attention-Deficit Hyperactivity Disorder, (ADHD), is an established childhood psychiatric disorder, and it is the present diagnosis for children with major difficulties in the core symptoms; impulsiveness, attention and hyperactivity. The disorder is known to persist into adulthood and create major problems in coping with everyday life. With ADHD follows a vast variety of other conditions, which burdens the ADHD individuals even more. The major cause for the disorder is in heritage but also other possible explanations will be discussed. The main treatment for ADHD is psycho stimulants, such as methylphenidate and amphetamine. ADHD is associated with substance abuse and several articles in this essay will provide support for that. Is substance abuse in ADHD individuals a form of self-medication in order to ameliorate the symptoms or is the increased risk for substance abuse due to the stimulant medications? In this essay, I will describe what ADHD is, present what are its known causes, summarize the treatments available for ADHD, and discuss the relationships between ADHD and substance abuse.

  • 1015.
    Banjac Vujic , Gordana
    et al.
    University of Skövde, School of Life Sciences.
    Hellmark , Britt
    University of Skövde, School of Life Sciences.
    När vårdcentralens läkartider inte räcker till: Sjuksköterskors upplevelse av telefonrådgivning när denvårdsökande inte kan beredas tid trots ett medicinskt behov2009Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    During the past decades the telephone has become an important tool in the healthcare system when people seek help and advice for medical problems. Telephone lines to all healthcare centres in Sweden were established in the 1970´s. A large part of nurses´ work at a healthcare centre consists of giving telephone advice. The callers´ medical needs are assessed and the callers are referred to the proper level of care. The aim of this study is to find out what nurses experience when the caller cannot be given an appointment, despite a medical need for one, because there are insufficient medical appointments available due to a shortage of general practitioners. Ten nurses working with telephone advice at healthcare centre were interviewed. The study was done with a qualitative method using a phenomenological approach. Results indicate that the informants have several different emotional experiences. The informants experience that they cannot always live up to the care guarantee, but that the problem is organizational and beyond their control. Sometimes telephone work feels heavy, and thoughts of how things go for the caller can continue when the work-day is finished. Experience and knowledge are considered important in order to be able to handle the situation better and to make a correct assessment. Support from colleagues is pointed out as meaningful. It is considered important to carefully document the advice given during the telephone call and which measures are planned.

  • 1016.
    Bankler, Jon Victor
    University of Skövde, School of Informatics.
    A chinese view on indie: How is ‘indie’ defined by professionals within the Chinese indie game industry?2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This study aimed to explore which philosophies and opinions professionals within the Chinese indie game industry hold in relation to the indie concept. Indie is a short form of the word "independence”, and is used to describe certain products and creative practices within media such as video games. The term’s exact definition is however subject to discussion. This study aims to include Chinese game professionals in this discussion.

    The study was carried out in China through Game Hub Scandinavia (Game Hub Scandinavia, 2018) and in cooperation with Indienova. The participants that were interviewed in this study were all professionals within the Chinese game industry. The research tools developed for these interviews were two playable demos and a survey. The answers provided constituted as basis for the study’s concluding analysis.

    The data indicated that the Chinese indie developers define indie as a creative endeavour which products and underlying ambitions contrasts the commercially motivated game industry in China.

  • 1017.
    Bankler, Jon Victor
    University of Skövde, School of Informatics.
    The Cultural Adaptation of Playful Learning: Aspects to consider when culturalizing a children’s educational game for the Chinese market2019Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    This study explores suitable applications of culturalization in the case of educational games for children, specifically in relation to the Chinese market. Culturalization, in the context of video games, are design choices and adjustments applied to a product in order to cater to the needs of different cultural environments. The characteristics of both this genre, and this target locale, determines to which aspects of the product culturalization should be applied.

    Using three commercial educational games as a basis for discussion, the research was conducted through a series of expert interviews with pedagogues, localizers and game researchers in China. By analyzing the data gathered through these interviews, a series of aspects to consider for culturalization was defined. These were: usage of cultural references; the branding of the product; educational utility in relation to the local school curriculum; choice of gamification design.

  • 1018.
    Banks, H. T.
    et al.
    Center for Research in Scientific Computation North Carolina State University Raleigh, NC, USA.
    Banks, J. E.
    Undergraduate Research Opportunities Center (UROC) California State University, Monterey Bay Seaside, CA, USA.
    Bommarco, Riccardo
    Department of Ecology Swedish University of Agricultural Sciences Uppsala, Sweden.
    Curtsdotter, Alva
    Department of Ecology Swedish University of Agricultural Sciences Uppsala, Sweden.
    Jonsson, Tomas
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Department of Ecology Swedish University of Agricultural Sciences Uppsala, Sweden.
    Laubmeier, A. N.
    Center for Research in Scientific Computation North Carolina State University Raleigh, NC, USA.
    Parameter estimation for an allometric food web model2017In: International journal of pure and applied mathematics, ISSN 1311-8080, E-ISSN 1314-3395, Vol. 114, no 1, p. 143-160Article in journal (Refereed)
    Abstract [en]

    The application of mechanistic models to natural systems is of interest to ecological researchers. We use the mechanistic Allometric Trophic Network (ATN) model, whichis well-studied for controlled and theoretical systems, to describe the dynamics of the aphidRhopalosiphum padi in an agricultural field. We diagnose problems that arise in a first attemptat a least squares parameter estimation on this system, including formulation of the modelfor the inverse problem and information content present in the data. We seek to establishwhether the field data, as it is currently collected, can support parameter estimation for theATN model.

  • 1019.
    Bannert, Robert
    et al.
    University of Skövde, School of Humanities and Informatics.
    Botinis, Antonis
    University of Skövde, School of Humanities and Informatics.
    Gawronska, Barbara
    University of Skövde, School of Humanities and Informatics.
    Hollenstein, Gerd
    University of Skövde, School of Humanities and Informatics.
    Anforderungen an eine Lernumgebung für computergestütztes Fremdsprachenlernen2004In: Norden und Süden: Festschrift für Kjell-Åke Forsgren zum 65. Geburtstag / [ed] Mareike Jendis, Anita Malmqvist & Ingela Valfridsson, Umeå Universitet , 2004Chapter in book (Other (popular science, discussion, etc.))
  • 1020.
    Barenfeld, Sandra
    et al.
    University of Skövde, School of Technology and Society.
    Gustafsson, Karin
    University of Skövde, School of Technology and Society.
    Hur kan en attraktiv och trivsam offentlig miljö skapas i en centralt belägen galleria i en medelstor stad?2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vi utgick från att ställa oss frågan hur den offentliga miljön i en galleria blir attraktiv och trivsam för besökare. Vi hade tidigare uppmärksammat att gallerian i vår studiestad inte lämnade ett minnesvärt intryck och ville därför gå på djupet i detta ämne. Vi har i vår uppsats observerat fyra gallerior i syd- och mellansverige för att hitta framgångsreceptet för att en centralt belägen galleria ska bli attraktiv och trivsam. Vi ställde oss då frågan: hur kan en attraktiv och trivsam offentlig miljö skapas i en centralt belägen galleria i en medelstor stad? Syftet var att finna de faktorer som gör en galleria attraktiv för besökarna, när det gäller de offentliga ytorna. Vi har undersökt vilka faktorer som är viktiga i den offentliga miljön i en galleria. Slutligen syftar denna studie till att kunna ge ett antal rekommendationer om den offentliga miljön till centralt belägna gallerior i medelstora städer.

    Vår undersökning för uppsatsen har genomförts genom en kvalitativ metod då vi har intervjuat två arkitekter och två centrumledare, observerat fyra gallerior och genomfört två fokusgruppsintervjuer. Detta har vi gjort för att se hur gallerior utformas idag och hur utformningen går till. Vi genomförde en jämförelse mellan fokusgruppsintervjuerna och våra intervjuer med arkitekter och centrumledare. Dessa svar styrktes sedan med den teori vi presenterat gällande den exteriöra, interiöra och psykosociala miljön, om hur en attraktiv och trivsam miljö skapas i centralt belägna gallerior.

    Resultaten från undersökningen visar att många gallerior uppfyller ett stort antal av de krav som finns för att en galleria ska ses som attraktiv och trivsam. Dock finns åtskilliga faktorer att ta hänsyn till vid utformandet av den offentliga miljön i en galleria för att den ska lämna en minnesvärd upplevelse hos besökaren. En slutsats vi kan dra av vår undersökning är att gallerior gärna ska vara något unikt utformande och centrumledare och ansvarig för galleriorna måste kontinuerligt arbeta med att underhålla gallerian. De gallerior vi observerat håller en jämn och hög standard men vi har avslutat uppsatsen med ge rekommendationer i samband med framtida utveckling.

  • 1021.
    Bari, M. A.
    et al.
    University of Rajshahi.
    Islam, W.
    University of Rajshahi.
    Khan, A. R.
    University of Rajshahi.
    Mandal, Abul
    University of Skövde, The Systems Biology Research Centre. University of Skövde, School of Life Sciences.
    Antibacterial and Antifungal Activity of Solanum torvum (Solanaceae)2010In: International Journal of Agriculture & Biology, ISSN 1560-8530, Vol. 12, no 3, p. 386-390Article in journal (Refereed)
    Abstract [en]

    Leaves, stem, roots and inflorescence of Solanum torvum Sw. were extracted in two different organic solvents (chloroform & methanol). Antibacterial and antifungal effects of the extracts were tested on fifteen (six Gram positive & nine Gram negative) human  pathogenic  bacteria  and  on  eight  pathogenic  fungi.  Methanolic  extracts  of  roots  of  S.  torvum  exhibited  promising antibacterial  and  antifungal  effects  on  all  organisms  tested  in  comparison  with  that  observed  in  the  leaves,  stems  and inflorescence extracts. The toxicity of the extracts was in the following order; root>stem>inflorescence>leaf. The minimum inhibitory concentration (MIC) values of methanolic extract of roots of S. torvum were in the range between 64-128 µg mL -1 . Chloroform  extracts  of  roots  were  more  toxic  (LC 50  35.4629  ppm)  than  other  extracts  analyzed  in  Brine  shrimp  test.  In conclusion, S. torvum appears to be an attractive material for the development of antimicrobial drugs and environment friendly biopesticides.

  • 1022.
    Barka, Ezedin
    et al.
    UAE University, United Arab Emirates.
    Mathew, Sujith
    UAE University, United Arab Emirates.
    Atif, Yacine
    UAE University, United Arab Emirates.
    Securing the Web of Things With Role-Based Access Control2015In: Codes, Cryptology, and Information Security: First International Conference, C2SI 2015, Rabat, Morocco, May 26-28, 2015, Proceedings - In Honor of Thierry Berger / [ed] Said El Hajji, Abderrahmane Nitaj, Claude Carlet, El Mamoun Souidi, Springer, 2015, p. 14-26Chapter in book (Refereed)
    Abstract [en]

    Real-world things are increasingly becoming fully qualified members of the Web. From, pacemakers and medical records to children’s toys and sneakers, things are connected over the Web and publish information that is available for the whole world to see. It is crucial that there is secure access to this Web of Things (WoT) and to the related information published by things on the Web. In this paper, we introduce an architecture that encompasses Web-enabled things in a secure and scalable manner. Our architecture utilizes the features of the well-known role-based access control (RBAC) to specify the access control policies to the WoT, and we use cryptographic keys to enforce such policies. This approach enables prescribers to WoT services to control who can access what things and how access can continue or should terminate, thereby enabling privacy and security of large amount of data that these things are poised to flood the future Web with.

  • 1023.
    Barker, Dean
    et al.
    University of Gothenburg, Sweden.
    Nielsen, Jacob
    University of Gothenburg, Sweden.
    Wahlström, Martin
    University of Gothenburg, Sweden.
    Barker-Ruchti, Natalie
    University of Gothenburg, Sweden.
    Carlén, Urban
    University of West, Sweden.
    Maivorsdotter, Ninitha
    University of Skövde, School of Health and Education. University of Skövde, Health and Education.
    Jacob and Martin: Developing digital technology competence in physical education teacher education2017In: Digital technologies and learning in physical education: Pedagogical cases / [ed] Ashley Casey, Victoria A. Goodyear, Kathleen M. Armour, London: Routledge, 2017, p. 231-246Chapter in book (Other academic)
  • 1024.
    Barkestedt, Filip
    University of Skövde, School of Informatics.
    Jämförelse av WebGL-teknologier vid rendering av heatmaps utifrån marin miljödata: Jämförelse mellan Three.js och X3DOM2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    En stor kvantitet av miljödata samlas hela tiden in och för att dra nytta av all data behöver den förstås av de användarna som kan applicera kunskapen inom deras område. Visualiseringar tillåter användare att förstå datan och det är därför en viktig del av hur en användare kan ta del av den datan som samlas in. I detta arbete evalueras de WebGLbaserade teknologierna Three.js och X3DOM om vilken som är mest lämplig för att visualisera geospatial data på webben utifrån hur effektiva de är vid rendering av heatmaps. Två applikationer utvecklas, en baserat på Three.js och en på X3DOM. Mätningar utförs på varje applikation för att jämföra renderingstiden mellan teknologierna och en kvalitativ studie används för att evaluera deras användbarhet. Resultatet blev att Three.js är mer lämpligt för att visualisera geospatial data på webben.

  • 1025.
    Barlas, Sofia
    et al.
    University of Skövde, School of Engineering Science.
    Buerba, Adriana
    University of Skövde, School of Engineering Science.
    Analyze, consolidate and improve the product development process at Parker Hannifin QCDE through implementation of DFMA principles2017Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Parker Hannifin QCDE aim to eliminate as much wasted time, materials and resources as achievable by implementing Design for Manufacturing and Assembly principles into a modified version of their Product Development Process. The modified Product Development Process was developed within this project with the objective of aiding the company to remain competitive within their field, as well as continue to efficiently develop and produce high quality products.

     

    A literature study was performed to gain a greater understanding of the multiple Design for Excellence methods and their possibilities to enhance the Product Development Process at Parker Hannifin QCDE. The literature study included various sources such as academic books and scientific articles.

     

    An empirical study was conducted and the use of the current Internal Product Development Process was evaluated in conjunction with a detailed evaluation of the designated coupling. An additional aspect that was explored includes an evaluation of the extent of Design for Manufacturing and Assembly that is implemented into the current Internal Product Development Process.

     

    The Generation chapter of this thesis outlines the sequence and process implemented for generating the modified Internal Product Development Process and implementing Design for Manufacturing and Assembly. The results of this thesis project included implementing Design for Manufacturing and Assembly in the form of checklists. The multiple Design for Excellence checklists were inspired in part by the information obtained from the literature study and the authors interpretation. The finished concept has been provided to Parker Hannifin QCDE in the form of a pamphlet including instructions of how to implement the checklists into the modified Internal Product development process.

     

    The discussion chapter within this report consists of a conclusion and deliberation regarding the methodology used within this thesis. The results obtained from this thesis have been dissected and evaluated along with implications and potential weaknesses in the work.

  • 1026.
    Barrera Diaz, Carlos Alberto
    University of Skövde, School of Engineering Science. Volvo Cars Corporation Skövde.
    Discrete event simulation data management2016Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Simulation is one of the most important decision support tools that has been present during decades in the manufacturing industry. Discrete Event Simulation (DES) experiments analysis is an important engineering activity for efficient production. In order to improve this efficiency, many companies must develop a supporting framework, between engineers and the process information. Within DES it is also important the model provenance information because it validates the credibility of the model to be reused. Therefore, nowadays there is a great interest in the simulation community based on the reusability of the simulation models. The engineers at Volvo Cars Corporation (VCC) who work with DES technology, request and deliver a high number of Key Performance Indicators (KPIs). As a consequence it is difficult to present the simulation results in a standardized way. This thesis has investigated a way to reduce and standardize this time consuming process. Thus, by the study of what information and data must be documented and how it must be presented, the main goal of this thesis was to improve the efficiency of a company, when a DES project is being developed. A survey based on VCC simulation projects, was undertaken with the aim to find the output data and the information that must be included in a standardized report. First, the information of the projects was categorized in three main groups: general information, input data and output data. Within these groups, the provenance metadata which allows the reuse of the DES project, was identified. Then, after the analysis of 23 reports from DES projects, most frequent scenarios and their related output data were identified. All the findings were used for the implementation of a standardized and automated data-handling system which simplify the project documentation task to the engineers. This data-handling system exports the key output data from the simulation software to the report designed. Validation interviews show a strong acceptance among the engineers at VCC. Finally, in order to properly keep in track with all the provenance information when a DES project is being performed, a management method was proposed as well.

  • 1027.
    Barrera Diaz, Carlos Alberto
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Oscarsson, Jan
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lidberg, Simon
    Volvo Car Corporation, Skövde, Sweden.
    Sellgren, Tommy
    Volvo Car Corporation, Skövde, Sweden.
    A Study of Discrete Event Simulation Project Data and Provenance Information Management in an Automotive Manufacturing Plant2017In: Proceedings of the 2017 Winter Simulation Conference / [ed] W. K. V. Chan, A. D’Ambrogio, G. Zacharewicz, N. Mustafee, G. Wainer, E. Page, IEEE, 2017, , p. 12p. 4012-4023Conference paper (Refereed)
    Abstract [en]

    Discrete Event Simulation (DES) project data management is a complex and important engineering activity which impacts on an organization’s efficiency. This efficiency could be decreased by the lack of provenance information or the unreliability of existing information regarding previous simulation projects, all of which complicates the reusability of the existing data. This study presents an analysis of the management of simulation projects and their provenance data, according to the different types of scenarios usually found at a manufacturing plant. A survey based on simulation projects at an automotive manufacturing plant was conducted, in order to categorize the information regarding the studied projects, map the available provenance data and standardize its management. This study also introduces an approach that demonstrates how a structured framework based on the specific data involved in the different types of scenarios could allow an improvement of the management of DES projects.

  • 1028.
    Barrera Diaz, Carlos Alberto
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Oscarsson, Jan
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    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 Plant2018In: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, p. 8p. 23-30Article in journal (Refereed)
    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.

  • 1029.
    Barrsten, Petra
    et al.
    University of Skövde, School of Health and Education.
    Malmborg, Johanna
    University of Skövde, School of Health and Education.
    Palliativ vård i hemmet: Närståendes erfarenheter - En litteraturbaserad studie2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Palliativ vård bygger på ett förhållningsätt som innebär att öka livskvalitén för både patienten och dess närstående. Palliativ vård handlar om god symtom kontroll och lindring. Den palliativa vården i hemmet lägger stort ansvar på de närstående, inte bara när det kommer till kontrollera symtomen men att organisera vården för patienten 24 timmar/dygnet. Sjuksköterskan måste se patienten och närståendes livssituation för att ge bra stöd i hemmet. Syfte: Syftet med denna studie var att belysa närståendes erfarenheter av att vårda den sjuke palliativt i hemmet. Metod: Som metod valdes en litteraturbaserad studie. Datamaterialet bestod av nio kvalitativa vetenskapliga artiklar. Resultat: Tre kategorier identifierades såsom: Ny roll, behov av hjälp från kunniga och behålla det egna livet med sex underkategorier. Närståendes erfarenheter, att ha ett stort ansvar är svårt och krävande men även meningsfullt. Brist på stöd från sjukvården påverkar närståendes förmåga att vårda den sjuke. Slutsats: När närstående vårdar den sjuke i hemmet är tiden både tung och meningsfull. Det beror på vilket stöd och information de får från sjuksköterskorna samt om de själva får möjligheten att distansera sig till vårdandet för att behålla det egna livet.

  • 1030.
    Barstorp, Marcus
    University of Skövde, School of Humanities and Informatics.
    Optimering av ARM-maskinkod med predikatbaserad exekvering: En undersökning av predikatbaserad exekvering i ARM-arkitekturen2010Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Arbetet har undersökt hur predikatbaserad exekvering, i form av ARM-arkitekturens stöd för villkorlig exekvering, fungerar som optimering av specifika implementationer av if- och if-else-satser i ARM-maskinkod. Som en del av arbetet implementerades en för ändamålet konstruerad optimeringsalgoritm som optimerar if- och if-else-satser med hjälp av predikatbaserad exekvering, vilken användes för att kunna utföra de mätningar som ligger till grund för resultatet. Fokus låg på den skillnad i kodstorlek och/eller tidseffektivitet som optimeringen gav upphov till. Resultatet tyder på att predikatbaserad exekvering använd som optimering kan leda till vissa vinster i kodstorlek (direkt beroende på antalet if-/if-else-satser) och lite större vinster i tidseffektivitet (beroende på hur stora if-/if-else-satserna är, samt hur ofta de exekveras).

  • 1031.
    Bartlett, Madeleine E.
    et al.
    Centre for Robotics and Neural Systems, University of Plymouth, UK.
    Costescu, Cristina
    Department of Clinical Psychology and Psychotherapy, Babes-Bolyai University, Cluj-Napoca, Romania.
    Baxter, Paul
    Lincoln Centre for Autonomous Systems, School of Computer Science, University of Lincoln, UK.
    Thill, Serge
    University of Skövde, School of Informatics. University of Skövde, Informatics Research Environment. Donders Institute for Brain, Cognition, and Behaviour, Radboud University Nijmegen, The Netherlands.
    Requirements for Robotic Interpretation of Social Signals “in the Wild”: Insights from Diagnostic Criteria of Autism Spectrum Disorder2020In: Information, E-ISSN 2078-2489, Information, E-ISSN 2078-2489, Vol. 11, no 2, article id 81Article in journal (Refereed)
    Abstract [en]

    The last few decades have seen widespread advances in technological means to characterise observable aspects of human behaviour such as gaze or posture. Among others, these developments have also led to significant advances in social robotics. At the same time, however, social robots are still largely evaluated in idealised or laboratory conditions, and it remains unclear whether the technological progress is sufficient to let such robots move “into the wild”. In this paper, we characterise the problems that a social robot in the real world may face, and review the technological state of the art in terms of addressing these. We do this by considering what it would entail to automate the diagnosis of Autism Spectrum Disorder (ASD). Just as for social robotics, ASD diagnosis fundamentally requires the ability to characterise human behaviour from observable aspects. However, therapists provide clear criteria regarding what to look for. As such, ASD diagnosis is a situation that is both relevant to real-world social robotics and comes with clear metrics. Overall, we demonstrate that even with relatively clear therapist-provided criteria and current technological progress, the need to interpret covert behaviour cannot yet be fully addressed. Our discussions have clear implications for ASD diagnosis, but also for social robotics more generally. For ASD diagnosis, we provide a classification of criteria based on whether or not they depend on covert information and highlight present-day possibilities for supporting therapists in diagnosis through technological means. For social robotics, we highlight the fundamental role of covert behaviour, show that the current state-of-the-art is unable to charact

  • 1032.
    Bartlett, Madeleine
    et al.
    Centre for Robotics and Neural Systems (CRNS), University of Plymouth, Plymouth, United Kingdom.
    Edmunds, Charlotte E.R.
    Warwick Business School, University of Warwick, Coventry, United Kingdom.
    Belpaeme, Tony
    Centre for Robotics and Neural Systems (CRNS), University of Plymouth, Plymouth, United Kingdom / ID Lab—imec, University of Ghent, Belgium.
    Thill, Serge
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Donders Institute for Brain, Cognition, and Behavior, Radboud University, Nijmegen, Netherlands.
    Lemaignan, Séverin
    Bristol Robotics Lab, University of the West of England, Bristol, United Kingdom.
    What Can You See?: Identifying Cues on Internal States From the Movements of Natural Social Interactions2019In: Frontiers in Robotics and AI, E-ISSN 2296-9144, Vol. 6, no 49Article in journal (Refereed)
    Abstract [en]

    In recent years, the field of Human-Robot Interaction (HRI) has seen an increasingdemand for technologies that can recognize and adapt to human behaviors and internalstates (e.g., emotions and intentions). Psychological research suggests that humanmovements are important for inferring internal states. There is, however, a need to betterunderstand what kind of information can be extracted from movement data, particularlyin unconstrained, natural interactions. The present study examines which internal statesand social constructs humans identify from movement in naturalistic social interactions.Participants either viewed clips of the full scene or processed versions of it displaying2D positional data. Then, they were asked to fill out questionnaires assessing their socialperception of the viewed material. We analyzed whether the full scene clips were moreinformative than the 2D positional data clips. First, we calculated the inter-rater agreementbetween participants in both conditions. Then, we employed machine learning classifiersto predict the internal states of the individuals in the videos based on the ratingsobtained. Although we found a higher inter-rater agreement for full scenes comparedto positional data, the level of agreement in the latter case was still above chance,thus demonstrating that the internal states and social constructs under study wereidentifiable in both conditions. A factor analysis run on participants’ responses showedthat participants identified the constructs interaction imbalance, interaction valence andengagement regardless of video condition. The machine learning classifiers achieveda similar performance in both conditions, again supporting the idea that movementalone carries relevant information. Overall, our results suggest it is reasonable to expecta machine learning algorithm, and consequently a robot, to successfully decode andclassify a range of internal states and social constructs using low-dimensional data (suchas the movements and poses of observed individuals) as input.

  • 1033.
    Bartziokas, Andreas
    University of Skövde, School of Humanities and Informatics.
    Skapandet av B.O.B. - Balls Over Brains: om konsten att väcka intresse hos spelaren för att fortsätta spela2009Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete är skapat av Andreas Bartziokas, som examensarbete för VT 2009. I denna uppsats beskrivs hur spelet B.O.B. har skapats. Vilken litteratur som varit användbar för skapandet av spelet, samt en övergripande beskrivning av själva spelet.

  • 1034.
    Basic, Anesa
    et al.
    University of Skövde, School of Life Sciences.
    Johnsson, Sofia
    University of Skövde, School of Life Sciences.
    BVC-SJUKSKÖTERSKORS ERFARENHETER AV ATT GE STÖD TILL NYBLIVNA FÖRÄLDRAR FÖR ATT FRÄMJA AMNINGEN2013Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • 1035.
    Batangouna, Steve Jehu
    University of Skövde, School of Technology and Society.
    Användning av information i ett mellanlager inom fordonsindustri.: En fallstudie av Vici Industri AB i Skövde.2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    To make visible information at all stages of the process from beginning to end at the company allows the discovery of errors at the early stage of process, and at the same time allows the fact that information been addressed in a timely and efficient manner. It is therefore Pearlson & Saunders (2010) argue that information systems are based on three fundamental pillars: technology, people and process. Without the interaction of these pillars, it is difficult or impossible to succeed in implementing any form of database. The flow of materials and information must go hand in hand with each other to improve production efficiency. It is, therefore, Mattsson (2010) argues that an efficient material flow utilizing resources efficiently create condition of satisfying customer’s demand in good ways. To achieve this goal, it requires for the company to create conditions to report errors in the early stages of the process as soon as possible. This avoids unnecessary work that customers are not prepared to pay for. That's why Alter (2006) points out that the conditions for an increase in efficiency in business can only be reached if there is a clear link between information, technology, users and information management activities. Today IT, Information technology is one of effective tools which enable implementation of the common database within the same organization. The database aims to coordinate and streamline the flow of both materials and information at the company. The common database creates the potential for a complete, time-date and accurate information shared within the company among various departments. These in turn create conditions for the efficient production that leads to profitability.

  • 1036.
    Batofi, Sardar
    University of Skövde, School of Informatics.
    Grafiska Designens verkan på högskolestudenter gällande tilliten till nyhets webbplatser: Denna rapport handlar om hur den grafiska designen på en nyhets webbplats påverkar Högskolestudenters tillit till webbplatsen, och hur det påverkar trovärdigheten på artiklar som återfinns på webbplatsen2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This review is about how the graphic design on a news site influences college students' trust towards the site and how it affects the credibility to the articles from the student's perspective. The review was conducted on the basis of a triangular research method. A quantitative and a qualitative method was used, the collection techniques used during the review were a survey and interviews. The purpose of the survey was to understand what factors affect users' trust in a news site and article credibility. The motivation for this review is that truthless news are spread across social media and that many people do not realize that the news is truthless and choose to share it with their circle on social media. This is something that needs to be processed and fixed. 

  • 1037.
    Baxter, John
    University of Skövde, School of Bioscience.
    Evaluation of Oxford nanopore’s MinION: Use, functionality, and genome assembly2019Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    The rapid and reliable detection of pathogens is of utmost importance in healthcare settings to ensure the appropriate treatment thereby reducing morbidity and mortality for the patient. Current culturing, PCR based and NGS species detection methods are time consuming (Opota et al., 2015), limited in their detection (Buckley et al., 2015), or require specialist skills and are expensive (Basho and Eterovic., 2015). Oxford Technologies Nanopore devices could provide detailed genomic sequencing at a fraction of the cost and without the need for technical bioinformatic skills. This study evaluates the MinION device and analysis tools to suggest best practice. Classification and genotyping of 12 Klebsiella isolates were performed using EPI2ME automated workflows and manual de novo assembly.  Automated workflows using raw MinION reads provided clinically relevant information identified in ~6hrs. Manual de novo assembly and analysis used hybrid, and single source data took >24hrs. The inclusion of MinION long reads overcome problems assembling short reads. Hybrid genomes provided the most contiguous and highly detailed contigs. MinION only read assemblies contained more errors but still identified similar genotypic findings. Automated workflows are rapid and require minimal bioinformatic know-how. There should be a dialogue between clinicians and bioinformaticians to develop bespoke analysis tools.  Although challenges remain around compatible kits and vulnerable flowcells long read sequencing can be an effective tool for species detection and pathogen typing. Furthermore, hybrid assemblies have the potential to advance our genome detailing and discovery.

  • 1038.
    Bays, Harold E.
    et al.
    Louisville Metabolic and Atherosclerosis Research Center Inc., Louisville, KY, USA.
    Sartipy, Peter
    University of Skövde, School of Bioscience. University of Skövde, The Systems Biology Research Centre. Global Medicines Development, CVMD, AstraZeneca, Gothenburg, Sweden.
    Xu, John
    Biometrics and Information Sciences, AstraZeneca, Gaithersburg, MD, USA.
    Sjöström, Carl David
    Global Medicines Development, CVMD, AstraZeneca, Gothenburg, Sweden.
    Underberg, James A.
    Department of Medicine, NYU School of Medicine & NYU Center for Prevention of Cardiovascular Disease, New York, NY, USA.
    Dapagliflozin in patients with type II diabetes mellitus, with and without elevated triglyceride and reduced high-density lipoprotein cholesterol levels2017In: Journal of Clinical Lipidology, ISSN 1933-2874, E-ISSN 1876-4789, Vol. 11, no 2, p. 450-458Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: Dapagliflozin is a selective sodium-glucose cotransporter 2 inhibitor that improves glycemic control in patients with type II diabetes mellitus (T2DM) by reducing renal glucose reabsorption.

    OBJECTIVE: The aim was to evaluate the lipid effects of dapagliflozin 10 mg or placebo in patients with T2DM with/without baseline elevated triglyceride and reduced high-density lipoprotein (HDL) cholesterol levels.

    METHODS: This was a post hoc analysis of 10 phase 3, placebo-controlled studies of dapagliflozin 10 mg (N = 2237) or placebo (N = 2164) administered for 24 weeks in patients with T2DM. Patients with elevated triglyceride (>= 150 mg/dL [1.69 mmol/L]) and reduced HDL cholesterol levels (<40 mg/dL [1.04 mmol/L] in men; <50 mg/dL [1.29 mmol/L] in women) were included (group A). The reference group (group B) included patients who did not meet the defined lipid criteria.

    RESULTS: The effects of dapagliflozin on fasting lipid profiles were generally similar in the 2 lipid groups (ie, groups A and B) and, compared with placebo, were associated with minor increases in non-HDL cholesterol, low-density lipoprotein, and HDL cholesterol levels. The effects on triglyceride levels were inconsistent. The incidence of adverse events (AEs)/serious AEs, and AEs of genital infection, urinary tract infection, volume reduction, renal function, and hypoglycemia were similar in the 2 lipid groups.

    CONCLUSION: Patients with T2DM treated with dapagliflozin experienced minor changes in lipid levels; the changes were generally similar in the 2 lipid groups. The clinical significance of these changes in lipids is unclear, especially in view of the positive effects of dapagliflozin on other cardiovascular disease risk factors. 

  • 1039.
    Bazargan-Hejazi, Shahrzad
    et al.
    University of California, Los Angeles.
    Medeiros, Sarah
    University of California, Los Angeles.
    Mohammadi, Reza
    Karolinska Institutet.
    Lin, Johnny
    University of Los Angeles.
    Dalal, Koustuv
    University of Skövde, School of Life Sciences.
    Patterns of Intimate Partner Violence: a study of female victims in Malawi2012In: Journal of Injury and Violence Research, ISSN 2008-2053, E-ISSN 2008-4072, Vol. 5, no 1Article in journal (Refereed)
    Abstract [en]

    BACKGROUND: The term “intimate partner violence” (IPV) encompasses physical, sexual and psychological violence, or any combination of these acts, and globally is the most common type of violence against women. This study aims to examine the lifetime prevalence of different types of intimate partner violence (IPV) among Malawi women ages 15 to 49, and its association with age, education, and living in rural versus urban areas. METHODS: Data was obtained from a cross-sectional study of data as part of the 2004 Malawi Demographic and Health Survey.  Women were eligible for the study if they met the following criteria: 1) lived in one of the 15,041 households randomly selected from 522 rural and urban clusters located in 10 large districts of Malawi; 2) were married or cohabitating; and 3) were between the ages of 15 and 49 years.  Consenting, eligible women responded to a comprehensive questionnaire covering demographic factors, health issues, as well as items related to physical, emotional and sexual IPV.  To assess bivariate associations, chi-squared tests and multivariate logistic regressions were conducted. RESULTS: Among the 8291 respondents, 13% reported emotional violence; 20% reported being pushed, shaken, slapped or punched; 3% reported experiencing severe violence, such as being strangled or burned, threatened with a knife, gun or with another weapon; and 13% reported sexual violence.  Data showed women ages 15 to 19 were significantly less likely to report emotional IPV, women ages 25 to 29 were significantly more likely to report being pushed or shaken, slapped or punched (OR 1.35; CI: 1.05-1.73), and women ages 30 to 34 were significantly more likely to report sexual IPV, compared to women ages 45 to 49 (OR 1.40; CI: 1.03-1.90).  Finally, women who had no ability to read were less likely to report sexual IPV than their counterparts who could read a full sentence (OR 0.76; CI: 0.66-0.87). CONCLUSIONS: The prevalence of different types of IPV in Malawi appears slightly lower than that reported for other countries in sub-Saharan Africa.  Further studies are needed to assess the attitudes and behaviors of Malawi women towards acceptability and justification of IPV as well as their willingness to disclose it.

  • 1040.
    Becker, Fiona
    et al.
    Novozymes A/S, Bagsværd, Denmark.
    Schnorr, Kirk
    Novozymes A/S, Bagsværd, Denmark.
    Wilting, Reinhard
    Novozymes A/S, Bagsværd, Denmark.
    Tolstrup, Niels
    Exiqon, Vedbaek, Denmark.
    Bendtsen, Jannick Dyrløv
    Center for Biological Sequence Analysis, The Technical University of Denmark, Lyngby.
    Olsen, Peter Bjarke
    Novozymes A/S, Bagsværd, Denmark.
    Development of in vitro transposon assisted signal sequence trapping and its use in screening Bacillus halodurans C125 and Sulfolobus solfataricus P2 gene libraries2004In: Journal of Microbiological Methods, ISSN 0167-7012, E-ISSN 1872-8359, Vol. 57, no 1, p. 123-133Article in journal (Refereed)
  • 1041.
    Beckung, Camilla
    University of Skövde, School of Technology and Society.
    Född i frihet – Dömd till frihet?: – En kvalitativ studie om unga vuxnas förhållningssätt till valfrihet och väljande.2008Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna kvalitativa studie är att undersöka en grupp unga vuxnamänniskors förhållningssätt till dagens ökade valfrihet och väljande. Det empiriska materialet består av intervjuer med ungdomar i åldern 20-24 år och har analyserats mot bakgrund av resonemang om individualisering, valfrihet och väljande förda av A.Giddens, Z.Bauman, U.Beck och B.Schwartz. Gällandehantering av valmöjligheter utgår arbetet ifrån teorier om kognitiva dissonans, ontologisk trygghet samt lokus av kontroll. Även tidigare forskning om ungdomars förhållningssätt till valmöjligheter behandlas. Studiens huvudresultat visar att ungdomarna bl.a. upplever utbudet av alternativa vägar att välja bland gällande exempelvis studieprogram, yrke, bostadsort eller resmål som meningsfullt och identitetsskapande. Vidare anses att informationssökande gällande olika alternativ tar mycket tid och kraft i anspråk, vilket kan vara påfrestande. Utbudet av varor och tjänster gör att det uppstår en känsla av press då man förväntas vara aktiv och finna det ”bästa alternativet”. Ungdomarna upplever att deras psykiska välmående påverkas av valalternativ först när de blir alltför många till antalet. Stress upplevs då på grund av önskan om att göra det bästa valet.

  • 1042.
    Bedi, Abhishek
    University of Skövde, School of Bioscience.
    Impact of the new class of clinically relevant drugs: Imipridones on the migration of mantle cell Lymphoma cells2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Mantle cell lymphoma (MCL)is a subtype of B-cell lymphoma characterized by chromosomal translocation t(11;14)(q13;q32), enhancing the expression of cyclin D1, resulting in alteration in cell cycle progression. The translocation is the key event for initiation of mantle cell lymphoma however is not sufficient for the development of the disease. Changes in the expression of the G-protein coupled receptors in different cancer types due to mutations and other regulating mechanisms can lead to changes in expression of proteins, resulting in defects in signalling pathways,favouring tumor dissemination. Growing evidences suggests that the disease progression in various B cell malignancies is due to the interactions between neoplastic B cells and stromal cells in tissue microenvironment. ONC201 is an imipridone, which is an antagonist to a type of G-protein coupled receptor: dopamine receptor D2. ONC201 has the property for inhibiting proliferation and inducing apoptosis. The objective of the project was to investigate the migration of MCL cells towards fetal bovine serum and by this, study the impact of ONC201 on the migration of mantle cell lymphoma cells using chemotaxis assay. Theapoptotic effect of the drug was examined by detection of activecaspase-3 and cleaved PARP proteins using western blotting. The chemotaxis assay and western blot demonstrated that ONC201 inhibited migration of the mantle cell lymphoma cell lines at the concentration-dependent manner without inducing apoptosis in the cells at the investigated time point. The expression of cyclin D1 in the cells treated with ONC201 was also investigated after incubation period of 24 hours and it was observed that ONC201 plays a role in reducing cyclin D1 expression in mantle cell lymphoma cells.

  • 1043.
    Beetz, Andrea
    et al.
    Univ Rostock, Dept Special Educ, D-18055 Rostock, Germany .
    Kotrschalt, Kurt
    Univ Vienna, Dept Behav Biol, A-1010 Vienna, Austria .
    Turner, Dennis C.
    Univ Zurich Irchel, IEMT Switzerland & Anim Behav, Zurich, Switzerland .
    Hediger, Karin
    Univ Rostock, Dept Special Educ, D-18055 Rostock, Germany .
    Uvnäs-Moberg, Kerstin
    University of Skövde, School of Life Sciences.
    Julius, Henri
    Univ Rostock, Dept Special Educ, D-18055 Rostock, Germany .
    The Effect of a Real Dog, Toy Dog and Friendly Person on Insecurely Attached Children During a Stressful Task: An Exploratory Study2011In: Anthrozoos, ISSN 0892-7936, E-ISSN 1753-0377, Vol. 24, no 4, p. 349-368Article in journal (Refereed)
    Abstract [en]

    The regulation of stress by an attachment figure is a key feature of attachment relationships. Previous research suggests that in some cases animal companionship may be regarded as an attachment relationship. This may be particularly important for persons with an insecure or disorganized attachment pattern who may find it more difficult than securely attached individuals to accept social support from humans. In our study, we investigated whether 31 boys (aged 7-12 years) with insecure/disorganized attachment would profit more from the presence of a dog (n = 11) than of a friendly human (n = 11) or a toy dog (n = 9) as support during a socially stressful situation (Trier Social Stress Test for Children, TSST-C). Stress levels were assessed via salivary cortisol recorded five times before, during, and after the TSST-C. The behavior of the children was coded from video recordings. Self-reported stress levels did not significantly differ between the groups before and after the TSST-C. Salivary cortisol, however, was significantly lower in the real dog condition than in the other two conditions (Kruskal-Wallis H test on area under the curve increase (AUCi): chi(2) = 15.17, df = 2, p = 0.001). Also, the more the children stroked the dog, the less pronounced was their stress reaction (r(s) = -0.818, p = 0.002). Our data suggest an important role of physical contact in the stress reducing effect. We conclude that the children investigated profited more from interacting with a friendly dog than with either a human or a toy dog in a stressful situation. We discuss the relevance of our findings for animal-assisted interventions.

  • 1044.
    Behboudi, A.
    et al.
    Univ Gothenburg, Inst Biomed, Gothenburg, Sweden.
    Nordlander, C.
    Univ Gothenburg, Inst Cell & Mol Biol, Gothenburg, Sweden.
    Klinga-Levan, Karin
    University of Skövde, School of Life Sciences.
    Karlsson, S.
    Evidence for a tumor suppressor locus distal to Tp53 - a study in experimental endometrial adenocarcinoma2007In: European Journal of Cancer Supplements, ISSN 1359-6349, E-ISSN 1878-1217, Vol. 5, no 4, p. 62-62Article in journal (Other academic)
  • 1045.
    Beheshtinia, Mohammad Ali
    et al.
    Department of Industrial Engineering, University of Semnan, Iran.
    Ahmadi, Bahar
    Department of Industrial Engineering, University of Semnan, Iran.
    Fathi, Masood
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    A Genetic Algorithm with Multiple Populations to Reduce Fuel Consumption in Supply Chain2019In: International Journal of Transportation Engineering, ISSN 2322-259XArticle in journal (Refereed)
    Abstract [en]

    Reducing fuel consumption by transportation fleet in a supply chain, reduces transportation costs and consequently, the product final cost. Moreover, it reduces environmental pollution, and in some cases, it helps governments constitute less subsidies for fuels. In this paper, a supply chain scheduling is studied, with the two objective functions of minimizing the total fuel consumption, and the total order delivery time. After presenting the mathematical model of the problem, a genetic algorithm, named Social Genetic Algorithm (SGA) is proposed to solve it. The proposed algorithm helps decision makers determine the allocation of orders to the suppliers and vehicles and production and transportation scheduling to minimize total order delivery time and fuel consumption. In order for SGA performance evaluation, its results are compared with another genetic algorithm in the literature and optimal solution. Finally, a sensitivity analysis is performed on SGA. The results of comparisons also show the high performance of SGA. Moreover, by increasing the number of suppliers and vehicles and decreasing the number of orders, the value of the objective function is reduced.

  • 1046.
    Behm, Josefin
    University of Skövde, School of Humanities and Informatics.
    Realistisk- eller stiliserad grafisk stil i skräckspel: En jämförelse av två grafiska stilar applicerade på spelgenren survival horror2013Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete, som utgår ifrån observationen att många spel inom survival horror-genren använder sig av en realistisk grafisk stil på sina texturer, undersöker om det är möjligt att förmedla samma läskiga känsla genom användandet av en stiliserad, eller tecknad, grafisk stil. Tre 3D-modeller föreställande monster, modellerade med inspiration från survival horror-spel, texturerades på ett sätt som motsvarade en realistisk grafisk stil, samt ett som motsvarade en stiliserad grafisk stil. Dessa låg sedan som grund för en enkätundersökning där respondenterna fick välja vilken version av monstren som var läskigast.

  • 1047.
    Behnsen, Pia
    et al.
    Department of Clinical, Neuro- and Developmental Psychology, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Netherlands.
    Buil, Joanne M.
    Department of Clinical, Neuro- and Developmental Psychology, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Netherlands.
    Koot, Susanne
    Department of Clinical, Neuro- and Developmental Psychology, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Netherlands.
    Huizink, Anja
    University of Skövde, School of Health and Education. University of Skövde, Health and Education. Department of Clinical, Neuro- and Developmental Psychology, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Netherlands.
    Van Lier, Poul
    Department of Clinical, Neuro- and Developmental Psychology, Amsterdam Public Health Research Institute, Vrije Universiteit Amsterdam, Netherlands.
    Heart rate (variability) and the association between relational peer victimization and internalizing symptoms in elementary school children2019In: Development and psychopathology (Print), ISSN 0954-5794, E-ISSN 1469-2198, p. 1-9, article id 29 aprilArticle in journal (Refereed)
    Abstract [en]

    Relational victimization typically emerges first during the elementary school period, and has been associated with increased levels of internalizing symptoms in children. Individual differences in autonomic nervous system functioning have been suggested as a potential factor linking social stressors and internalizing symptoms. The aim of this study was therefore to examine whether heart rate and heart rate variability mediated the association between relational victimization and internalizing symptoms in 373 mainstream elementary school children. Children were assessed in 2015 (T 0 ; Grades 3-5, M age = 9.78 years, 51% boys) and reassessed in 2016 (T 1 ). Heart rate and heart rate variability were assessed during a regular school day at T 1 . A multi-informant (teacher and peer report) cross-time measure of relational victimization, and a multi-informant (self- and teacher report) measure of internalizing problems at T 1 was used. Results showed that heart rate variability, but not heart rate, mediated the association between relational victimization and internalizing symptoms. This study provides tentative support that in children from a general population sample, a psychobiological factor may mediate the association of relational victimization with internalizing symptoms.

  • 1048.
    Beijer, Anton
    et al.
    University of Skövde, School of Technology and Society.
    Lindholm, Magnus
    University of Skövde, School of Technology and Society.
    Beräkning av pumpkapacitet samt konstruktion av pumpfundament2013Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    A development project to solve problems with why submersible pumps in a run-off system broke down with periods of two years, on average, was performed in collaboration with Cementa AB in Skövde. Reason for the pumps breakdowns was searched and found to be inadequate procedures and missing knowledge of the maintenance required on the pumps. To solve this problem, guidelines for the purchase of new dry pit pumps were developed to allow for continuous maintenance. As the possibilities of placing a dry well pump did not exist at Cementa, a pump foundation was developed.

    Requirements for the development work were produced in cooperation with Cementas maintenance department and theoretical dimensioning of the submersible bilge pumps volume flow capacity was performed. Requirements were evaluated and weighted using Pairwise comparison. The design and control of the strength of the developed pump foundation was performed using finite element analysis in the software Pro/Engineer Creo 1.0 Mechanica. Controls of the strength of the attachment of the pump foundation and welds were performed analytically.

    The work resulted in a recommendation to Cementa AB in Skövde to bring in quotes on the new dry-pit pumps using the developed guidelines and to manufacture the pump foundation developed within the framework of the thesis. Cementa was also recommended to carefully follow the maintenance instructions for pumps and make it easier for staff to perform this maintenance. This was recommended to ensure that new pumps would have a longer and more economical lifetime.

  • 1049.
    Beiron, Sofia
    et al.
    University of Skövde, School of Technology and Society.
    Fredriksson, David
    University of Skövde, School of Technology and Society.
    "Det är någonting med limhallen": utvecklingen mot ett gott medarbetarskap i en god arbetsmiljö2008Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Modern organisationsforskning ser medarbetarskapet som en viktig del av ledarskapet och därför har vi valt att fokusera på medarbetarens roll i organisationen i vårt examensarbete. Vi genomförde en fallstudie på ett företag där ledningen hade behov av att få en djupare förståelse av en arbetsgrupps psykosociala och fysiska arbetsförhållanden. Då studiens syfte är att ingående beskriva medarbetarskapet på en fysiskt krävande arbetsplats, kommer studien att bli ett stöd i företagets planering av arbetsmiljön i en ny modernare fabrik.

    Vi samlade in empiriskt material genom deltagande observationer och öppna intervjuer och analyserade det utifrån Tengblads (2003) och Hällsténs & Tengblads (2006) teoretiska modeller om medarbetarskap. Då ett myndigt medarbetarskap innebär att individen ska vara ansvarstagande, utvärderar vi genom medarbetarskapets fem former (Tengblad, 2003) hur stort ansvar som läggs på medarbetaren och vilken grad av tillit som organisationen visar denne. Vi beskriver även medarbetarskapet genom modellen om medarbetarskapets fyra hörnstenar (Hällstén och Tengblad, 2006), utifrån begreppen Förtroende och Öppenhet, Gemenskap och Samhörighet, Engagemang och Meningsfullhet samt Ansvarstagande och Initiativförmåga. I analysen av medarbetarskapet har vi även tagit hänsyn till teorier och lagar som rör arbetsmiljön, eftersom dessa liksom medarbetarskapets etik framhåller vikten av en medarbetares välmående och värdiga arbetsförhållanden.

    Analysen av insamlade data visade att medarbetarskapet i den studerade avdelningen i många avseenden behöver utvecklas, men att arbetsgruppen upplever ett gott medarbetarskap på grund av en stark gemenskap. Gemenskapen gör att medarbetarna väljer att stanna kvar i avdelningen trots det slitsamma arbetet, vilket gör att de betalar för det upplevda goda medarbetarskapet med sin egen fysiska hälsa. Företaget har försökt att gå ifrån ett traditionellt medarbetarskap till ett grupporienterat, men för att lyckas med förändringen måste medarbetarna bli mer medvetna om vad rollen som en självstyrande grupp innebär och utveckla sin förmåga att styra upp sitt arbete på ett sätt som främjar en god fysisk och psykisk hälsa över tid.

  • 1050.
    Beischer, Martin
    University of Skövde, Department of Computer Science.
    Kvalitet Konceptuella Modeller: ett ramverk1999Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Det här examensarbetet handlar om konceptuella modeller. En modell är en abstraktion av en vald del av verkligheten i vilken det är möjligt att fokusera på och lyfta fram det som anses viktigt och bortse från det som inte är viktigt. En konceptuell modell är en sådan abstraktion av ett informationssystem.

    De konceptuella modellerna är de modeller som ska ligga till grund för design och implementation av informationssystemet, men de ska också ligga till grund för diskussion med övriga intressenter till det kommande informationssystemet. Detta ställer stora krav på de konceptuella modellerna eftersom de både måste vara avancerade nog för att ligga till grund för designen och implementationen och enkla nog för att kunna ligga till grund för diskussion med intressenterna. Att denna tvådelade inriktning krävs beror oftast på att de flesta intressenter inte har lika stor kunskap inom detta område som de experter som har tagit fram och dessutom arbetar med de konceptuella modellerna.

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