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  • 1401.
    Syrén, Felicia
    et al.
    Textile Materials Technology, Department of Textile Technology, Faculty of Textiles, Engineering and Business, University of Borås, Borås, Sweden.
    Li, Cai
    University of Skövde, School of Informatics.
    Billing, Erik
    University of Skövde, School of Informatics.
    Lund, Anja
    Textile Materials Technology, Department of Textile Technology, Faculty of Textiles, Engineering and Business, University of Borås, Borås, Sweden.
    Nierstrasz, Vincent
    Textile Materials Technology, Department of Textile Technology, Faculty of Textiles, Engineering and Business, University of Borås, Borås, Sweden.
    Characterization of textile resistive strain sensors2016Conference paper (Other academic)
  • 1402.
    Szekely, Bulcsu
    et al.
    Lappeenranta University of Technology.
    Hilletofth, Per
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Bakhsheshi, Amir Fazel
    Lappeenranta University of Technology.
    Role of Software Applications in Logistics Decision Making: Case of Warehouse Management Systems2009In: Networked Logistics and Production at South-East Finland, St Petersburg and Leningrad Oblast / [ed] Olli-Pekka Hilmola & Eugene Korovyakovsky, Lappeenranta University of Technology , 2009, p. 111-144Chapter in book (Other academic)
    Abstract [en]

    The ability of software applications to help solving logistics related problems has become of critical importance in general and bringing about productivity improvements in particular. This research is to scrutinize the role of IT solutions in this regard with warehouse systems in focus. According to the findings, software applications will contain increasing functionalities for training and guiding in finding and implementing novel logistics operational models with the goal of increasing return on investment with fewer resources. Intelligent automatically itself-adjusting service level agreement platforms might well be in the centre of focus of attention in the near future. The case study reveals that by synchronizing warehousing processes with advanced functionalities of a wms it becomes feasible to integrate strategic tactical considerations into operational matters in logistics decisions. In this manner it will be possible to enhance capacity utilization rates in executing processes despite large scale fluctuations in demand so as to increase responsiveness towards customers. In turn these factors will bring further simplicity and transparency into the contractual relations between the parties of a supply chain.

  • 1403.
    Szekely, Bulcsu
    et al.
    Lappeenranta University of Technology, Kouvola Research Unit, Finland.
    Saranen, Juha
    Lappeenranta University of Technology, Kouvola Research Unit, Finland.
    Hilmola, Olli-Pekka
    Lappeenranta University of Technology, Kouvola Research Unit, Finland.
    Toikka, Tero
    Lappeenranta University of Technology, Kouvola Research Unit, Finland.
    Hilletofth, Per
    University of Skövde, School of Technology and Society.
    Globalization and International Division of Work: New Ways of Co-operation within Lean Production Networks – Evidence from Russia, Finland & Sweden2008In: Fourth International Railway Logistics Seminar: Co-operation among Transportation Modes in Northern Europe / [ed] Olli-Pekka Hilmola, Lappeenranta University of Technology , 2008, p. 181-198Conference paper (Other academic)
  • 1404.
    Särelind, Viktor
    University of Skövde, School of Informatics.
    Kritiska framgångsfaktorer för implementation av business intelligence-system i små och medelstora företag: Skapandet av ett ramverk2016Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Today’s competitive market places great demands on organisations and their use of means to survive and gain competitive advantages. Business intelligence (BI) is an umbrella term of technologies that has become necessary for many organisations to survive the competitive market, and it gets more attention for every passing day. Unfortunately, the implementation of BI technologies is problematic and statistics show that more than 50% of all BI-initiatives fail. Therefore, some studies have identified critical success factors (CSFs), crucial for the implementation of BI, which is considered as a key for the success of a BI-project.

    However, the majority of the CSFs are based on large, international enterprises. Which differ from small and medium-sized enterprises (SMEs) which 99.9% of all Swedish companies consist of. Thus are the identification of relevant CSFs for SMEs crucial. The study has therefore with the research question: Which are the CSFs for implementation of BI-systems in SMEs created a framework with CSFs specially designed for SMEs, based on a literature review combined with expert interviews.

    The analysis and result of the study shows that the CSFs do not differ in terms of the organisation size, rather it differs depending on the size of the project. However, the study has also identified previously unidentified critical success factors crucial for the implementation of BI-systems.

    Keywords: Business intelligence, Critical Success factors, Implementation, Small and medium-sized enterprises

  • 1405.
    Sääker, Annica
    et al.
    University of Skövde, School of Technology and Society.
    Jange, Sara
    University of Skövde, School of Technology and Society.
    Utveckling av kaffekvarn anpassad för restaurangbranchen2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    This report describes the development of a coffee grinder within the HoReCa (Hotel, Restaurant, Catering) sector. The coffee grinder is suitable for filter coffee and the work was carried out in collaboration with Crem International with the objective of developing a new exclusive coffee grinder.

    A feasibility study was conducted with a market analysis where the goal was to obtain thoughts on the uses of a coffee grinder. The results acquired made up the foundation for the requirements and specification of the coffee grinder with the specific requests of Crem International. Ideas for aesthetics, details, and uses of the coffee grinder was also developed and evaluated in collaboration with the company to generate a new concept. In order to optimize concepts regarding interface and interaction the work was given to another member outside the project. The changes that were made were later adapted to fit the materials chosen and the technical aspects produced for the coffee grinder.

    The work resulted in a new coffee grinder which aesthetics, function and material was different to any other of Crem International existing products. The final concept has with its design gotten an exclusive expression which is further strengthened with new functions. The concept was developed in Pro Engineer (a 3D modelling program), with the exact measurements and parameters. The rendering process was later done with Autodesk Alias Studio to try to get the most realistic renderings possible.

  • 1406.
    Söderström, Eva
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Holgersson, Jesper
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Ökat digitalt innanförskap för äldre: Sunne2018Report (Other (popular science, discussion, etc.))
  • 1407.
    Söderström, Ingrid
    et al.
    University of Skövde, School of Technology and Society.
    Gustafsson, Johanna
    University of Skövde, School of Technology and Society.
    Development of trapeze system for dinghy sailing2008Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

     

    This is a Bachelor degree project report describing the

    development process of a trapeze system for dinghy

    sailing. The project was performed in cooperation with

    Seldén Mast AB, manufacturer of spars and rigging

    systems for yachts and dinghies.

    The trapeze system is used in some dinghy sailing

    classes. It is used to move the weight of the crew outside

    of the boat to compensate the force created by the wind

    in the sails. The system consists of a number of

    components. Focus of the project was set on the position

    adjustment device and the attachment to the harness.

    The product development process included a pre study,

    a Product Design Specification, a function analysis,

    concept development, embodiment, and detail design.

    The project resulted in three products: two variants of

    trapeze cleats (adjustment devices) and a trapeze ring (to

    enable attachment to the harness).

     

  • 1408.
    Sörensen, Lotta
    University of Skövde, School of Informatics.
    Starka kvinnliga action-hjältar: En studie i hur kvinnliga actionhjältar kan porträtteras2015Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Arbetet undersökte vad manliga och kvinnliga spelare föredrar hos en kvinnlig hjälte i ett actionspel. Inledningsvis diskuterades en rad tidigare studier kring genus i spel och annan visuell media. Därefter redogörs begreppen fysionomi och stereotyp för att få en förståelse för hur man kan dra slutsatser kring en karaktär från så lite information som en konceptbild. Därefter redogörs kända kvinnliga fiktiva hjältar från det senaste århundradet från film, spel och annan visuell media.

    Artefakten som skapades var fyra olika karaktärskoncept av olika kvinnliga hjältar som var baserade på en förundersökning. Förundersökningen bestod av en karaktärsstudie och en kvantitativ enkätundersökning. Karaktärerna utvärderades sedan med hjälp av semistrukturerade intervjuer där fem kvinnor och fem män deltog. Resultatet visade på indikationer att kvinnor lägger mer fokus vid karaktärers utseende och personlighet medan män lägger mer fokus vid karaktärers funktionalitet.

  • 1409.
    Tagami, Ayumu
    et al.
    KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Stockholm, Sweden / Nippon Paper Industries Co., Ltd., Research Laboratory, Oji, Kita-ku, Tokyo, Japan.
    Gioia, Claudio
    KTH Royal Institute of Technology, WWSC-Wallenberg Wood Science Centre, Stockholm, Sweden / University of Bologna, Department of Civil, Chemical, Environmental, and Materials Engineering, Bologna, Italy.
    Lauberts, Maris
    Latvian State Institute of Wood Chemistry, Riga, Latvia.
    Budnyak, Tetyana
    KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Stockholm, Sweden.
    Moriana, Rosana
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre. KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Stockholm, Sweden / SLU-Swedish University of Agricultural Sciences, Molecular Sciences, Uppsala, Sweden.
    Lindström, Mikael E.
    KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Stockholm, Sweden.
    Sevastyanova, Olena
    KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Stockholm, Sweden / KTH Royal Institute of Technology, WWSC-Wallenberg Wood Science Centre, Stockholm, Sweden.
    Solvent fractionation of softwood and hardwood kraft lignins for more efficient uses: Compositional, structural, thermal, antioxidant and adsorption properties2019In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 129, p. 123-134Article in journal (Refereed)
    Abstract [en]

    This work summarizes the impact of solvent fractionation on the chemical structure, antioxidant activity, heating values, and thermal and adsorption properties of industrial hardwood and softwood kraft lignins. The aim of the research was to develop a simple approach for obtaining lignin fractions with tailored properties for applications in certain materials. Four common industrial solvents, namely, ethyl acetate, ethanol, methanol and acetone, in various combinations, were found to be efficient for separating spruce and eucalyptus kraft lignins into fractions with low polydispersities. The ethanol fraction of spruce and the ethyl acetate fraction of eucalyptus afforded the highest yields. Gel-permeation chromatography analysis was used to evaluate the efficiency of the chosen solvent combination for lignin fractionation. The composition and structure of the lignin material was characterized by elemental analysis, analytical pyrolysis (Py-GC/MS/FID) and 31P NMR spectroscopy. The thermal properties of the lignin samples were studied using thermogravimetric analysis. Proximate analysis data (ash, volatile components, organic matter and fixed carbon) was obtained through the direct measurement of weight changes in each experimental curve, and the high heating values (in MJ/kg) were calculated according to equations suggested in the literature. The adsorption properties of fractionated kraft lignins were studied using methylene blue dye. The correlations observed between molecular weight, composition and functionality and the thermal, radical scavenging and adsorption properties of the lignin fractions provides useful information for selecting the appropriate solvent combinations for specific applications of lignin raw materials (including their use as antioxidants, biofuels or sorbents in water treatment processes). © 2018

  • 1410.
    Tammpere, Niklas
    University of Skövde, School of Humanities and Informatics.
    Karaktärsdrag och genus: En studie i könets betydelse för uppfattning och bedömning av karaktärsdrag hos digitalt animerade karaktärer2011Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    I denna studie behandlas effort shapes kopplat till digital animation med syfte att undersöka om det finns en könsbaserad skillnad i uppfattning och bedömning av karaktärsdrag. De animationer som har producerats är grundade på effort shapes som härstammar från Laban Movement Analysis. Metoden som har tillämpats för att samla in data är en kvalitativ enkät med öppna frågor som har besvarats av tio män samt tio kvinnor. Resultatet visade att det finns en skillnad mellan könen i bedömningen av karaktärerna men inte i uppfattningen av karaktärsdragen.

  • 1411.
    Tan, Anita
    et al.
    University of Skövde, School of Engineering Science.
    Edenfeldt, Isabelle
    University of Skövde, School of Engineering Science.
    Studie av Crowdsourcing som metodik inom produktutveckling av träningshandskar2016Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis has been carried out at the University of Skövde in collaboration with Casall Sports AB. The project goal was to evaluate and implement the method Crowdsourcing in Casall’s current product development process. The founder of the term Crowdsourcing, Jeff Howe, believed in engaging the public to solve different ranges of problems within a company. To explore the possible use of the method, a product development process was created for the company to work after when using Crowdsourcing.  This process was an outcome from literature studies in product development processes and in Crowdsourcing methods. With the use of this developed process, implementation of Crowdsourcing to Casall’s product development process was made. The result is presented as a guide for Casall using Crowdsourcing when developing new products or product lines. The online-platform crowdSPRING.com was chosen for applying phases including Crowdsourcing. To evaluate the guide, a mission statement for the development of training gloves was created for evaluation with a focus group of 10 people. The outcome of this project is a product development process with implementation of the method Crowdsourcing presented as a guide and accordingly a new approach for Casall when using crowdSPRING.

  • 1412.
    Tavara, Shirin
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. University of Borås.
    Parallel Computing of Support Vector Machines: A Survey2019In: ACM Computing Surveys, ISSN 0360-0300, E-ISSN 1557-7341, Vol. 51, no 6, p. 123:1-123:38, article id 123Article, review/survey (Refereed)
    Abstract [en]

    The immense amount of data created by digitalization requires parallel computing for machine-learning methods. While there are many parallel implementations for support vector machines (SVMs), there is no clear suggestion for every application scenario. Many factor—including optimization algorithm, problem size and dimension, kernel function, parallel programming stack, and hardware architecture—impact the efficiency of implementations. It is up to the user to balance trade-offs, particularly between computation time and classification accuracy. In this survey, we review the state-of-the-art implementations of SVMs, their pros and cons, and suggest possible avenues for future research.

  • 1413.
    Tavara, Shirin
    et al.
    Information Technology, University of Borås, Borås, Sweden.
    Schliep, Alexander
    Computer Science and Engineering, University of Gothenburg, Gothenburg, Sweden.
    Effect Of Network Topology On The Performance Of ADMM-based SVMs2018In: Proceedings 2018 30th International Symposium on Computer Architecture and High Performance Computing SBAC-PAD 2018: Lyon, France 24-27 September 2018, IEEE Computer Society, 2018, p. 388-393Conference paper (Other academic)
    Abstract [en]

    Alternating Direction Method Of Multipliers(ADMM) is one of the promising frameworks for training Support Vector Machines (SVMs) on large-scale data in adistributed manner. In a consensus-based ADMM, nodes may only communicate with one-hop neighbors and this may cause slow convergence. In this paper, we investigate the impact of network topology on the convergence speed of ADMM-basedSVMs using expander graphs. In particular, we investigate how much the expansion property of the network influence the convergence and which topology is preferable. Besides, we supply an implementation making these theoretical advances practically available. The results of the experiments show that graphs with large spectral gaps and higher degrees exhibit accelerated convergence.

  • 1414.
    Telander, Andreas
    et al.
    University of Skövde, School of Engineering Science.
    Fahlgren, Jessica
    University of Skövde, School of Engineering Science.
    Building a new production line: Problems, pitfalls and how to gain social sustainability2015Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis has been performed in collaboration with Volvo Cars Engine in Skövde, Sweden and Zhangjia-kou, China in order to receive a bachelor degree in automation engineering from the University of Skövde.

    The project focuses on analyzing the capacity of a future production line by using discrete event simulation. The production line is built in two different discrete event simulation software, FACTS analyzer and Plant Simulation. The focus of the study will be to compare the output results from the two software in order to give recommendations for which software to use in similar cases. This is done in order for Volvo Cars Corporation to have as a basis for further work in similar cases. The aim of the work is to verify the planned capacity of the new production line and to perform a leadership study with Chinese engineers in order to find out how they view the Swedish leadership and how this can be adapted to China and the Chinese culture and give recommendations for future work.

    The results of the capacity analysis show that the goals of parts produced can be reached for both planned capacities but also that there are potential constraints that have been identified in the system. The results of the leadership study also show that the overall approach should be slightly adapted to be better suited for the Chinese culture. The comparison of the two simulation software suggests that FACTS Analyzer is suit-able to use when less complex logic or systems are represented, however when building more complex models consisting of more complex logic Plant Simulation is more suitable.

  • 1415.
    Ternblad, Eva-Maria
    University of Skövde, School of Humanities and Informatics.
    KEX: Ett designkoncept för en mobil applikation som stödför delade reseupplevelser med kollektivtrafiken2013Student paper other, 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Enligt det så kallade fördubblingsmålet skall antalet resor med kollektivtrafiken fördubblas i Sverige fram till år 2020. För att nå upp till detta behövs inte bara investeringar utan även strukturella förändringar och nya sätt att tänka kring människors resande, ett synsätt som delas av myndigheter och forskningscentra på ett internationellt plan. I detta sammanhang anses det också viktigt att behålla yngre resenärer, vilket ställer krav på kollektivtrafiken att framstå som ett attraktivt alternativ till motordriven persontrafik. Här syftar det aktuella projektet till att bidra till en förstärkt resupplevelse i kombination med stöd för planering och genomförande av resor. Projektet tar avstamp i ett utnyttjande av modern informations- och kommunikationsteknologi samt i möjligheter inom Webb 2.0 att dela information. Studien, vilken har ett användarcentrerat synsätt på införandet av nya system, har bedrivits i form av benchmarking- och omvärldsanalys samt genom samtal i fokusgrupper och en iterativ designprocess. Projektet har resulterat i ett förslag till designkoncept för en mobil applikation – Kollektivtrafik EXperience, KEX.

  • 1416.
    Thabet, Mohammad
    et al.
    Department of Intelligent Hydraulics and Automation, Tampere University of Technology, Finland.
    Montebelli, Alberto
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Kyrki, Ville
    Department of Electrical Engineering and Automation, Aalto University, Finland.
    Learning Movement Synchronization in Multi-component Robotic Systems2016In: : ICRA 2016, Institute of Electrical and Electronics Engineers (IEEE), 2016, p. 249-256Conference paper (Refereed)
  • 1417.
    Thams, Christian
    et al.
    University of Skövde, School of Technology and Society.
    Nilsson, Micaela
    University of Skövde, School of Technology and Society.
    Development of a System to Seal Paper Bags for Recycling Food Waste2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Sorting food waste is important to utilize it as fuel or fertilizer. Food waste is placed in food waste paper bags and then a waste suction system can be used to transport the waste to a processing factory. The current method of sealing food waste bags for a suction system is ineffective and expensive. This project researches if a solution of sealing the bags can be made easier to apply and cheaper to implement.

    By observing the current system a requirement specification was created to make guidelines of what criteria the solution must achieve to give satisfactory results. This also resulted in two areas of development, the optimal seal and how the user is going to apply it.

    To find a new solution to seal the bag, existing solutions in other areas of interest were investigated. This resulted in a discovery of a method for joining paper together, which due to legal implications will be called “Harry”. “Harry” can be applied to the bag in various configurations. Tests were conducted so that the strongest configuration was achieved. The winning configuration was then chosen as the seal to be implemented.

    To develop how users are going to apply the seal, brainstorming was used to create different concepts and ideas. Three concepts were chosen to be tested using a focus group, feedback was given on all three concepts and the winner was “Concept 2” where the “Harry” technology is implemented in a fixed clamp on the food waste bag kitchen vessel. This solution was further developed and became the final concept.

    The result improves usability and ensures that the end product can be used in a processing factory. There are however factors of concern, if the seal will hold in a real environment and if the solution is usable enough.

  • 1418.
    Thannan, Andreas
    et al.
    University of Skövde, School of Technology and Society.
    Göransson, Andreas
    University of Skövde, School of Technology and Society.
    Utformining av vindavledare för flakkåpa2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Due to future EU-regulations, car manufacturers need to reduce their carbon dioxide emissions in order to compete with other companies. This report discusses the development of a wind deflector for Auto-kaross i Floby AB´s Ekobox mounted on a Volkswagen Transporter. The goal is to, due to future regulations of a maximum of 175 CO2/km for lightweight transport vehicles, reduce fuel costs and carbon diox-ide emissions by reducing air resistance. A study of aerodynamics and today’s market was made to find solutions applied to similar prob-lems. Through a costumer survey made by Autokaross, customer needs could be identified which formed the product specification. To gather a big amount of ideas during the concept generation several brainstorming methods were applied in sessions. The ideas were de-veloped into concepts and through consultations from the supervisor at Autokaross the most interesting concepts were picked out. The most important part in the project was the analysis in CFD, Computational Fluid Dynamics, where different cross sections were tested as well as full 3D-models to see what forms performs best and gets the lowest air resistance. When the final concept was to be chosen a concept selec-tion matrix was made were the results from the CFD-simulations had the biggest impact. The final result consists of two parts, a roof spoiler and a boattail, together with Autokaross existing side skirt which ful-fills the goal to reduce the air resistance and thus the carbon dioxide emission and the fuel costs. With these three parts the air resistance is reduced by 27 percent.

  • 1419.
    Thellman, Sam
    et al.
    Cognition & Interaction Lab, Department of Computer and Information Science, Linköping University, Linköping, Sweden.
    Silvervarg, Annika
    Cognition & Interaction Lab, Department of Computer and Information Science, Linköping University, Linköping, Sweden.
    Ziemke, Tom
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Cognition & Interaction Lab, Department of Computer and Information Science, Linköping University, Linköping, Sweden.
    Folk-Psychological Interpretation of Human vs. Humanoid Robot Behavior: Exploring the Intentional Stance toward Robots2017In: Frontiers in Psychology, ISSN 1664-1078, E-ISSN 1664-1078, Vol. 8, article id 1962Article in journal (Refereed)
    Abstract [en]

    People rely on shared folk-psychological theories when judging behavior. These theories guide people's social interactions and therefore need to be taken into consideration in the design of robots and other autonomous systems expected to interact socially with people. It is, however, not yet clear to what degree the mechanisms that underlie people's judgments of robot behavior overlap or differ from the case of human or animal behavior. To explore this issue, participants (N = 90) were exposed to images and verbal descriptions of eight different behaviors exhibited either by a person or a humanoid robot. Participants were asked to rate the intentionality, controllability and desirability of the behaviors, and to judge the plausibility of seven different types of explanations derived from a recently proposed psychological model of lay causal explanation of human behavior. Results indicate: substantially similar judgments of human and robot behavior, both in terms of (1a) ascriptions of intentionality/controllability/desirability and in terms of (1b) plausibility judgments of behavior explanations; (2a) high level of agreement in judgments of robot behavior -(2b) slightly lower but still largely similar to agreement over human behaviors; (3) systematic differences in judgments concerning the plausibility of goals and dispositions as explanations of human vs. humanoid behavior. Taken together, these results suggest that people's intentional stance toward the robot was in this case very similar to their stance toward the human.

  • 1420.
    Thim, Amanda
    University of Skövde, School of Informatics.
    Spoil the Story, Spoil It Not: Spoilers’ Effect on Player Choice in Branching Storyline Games2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Spoilers are in everyday life often seen as something to be strictly avoided. Nonetheless, earlier studies researching short stories found that spoilers can enhance the enjoyment of a story, rather than destroying it. At the same time, there are studies that have reached opposite results, but the placement and style of the spoiler may affect how it is received. When it comes to games there are no, or only a few, studies on the subject. When unspoiled, players generally choose non-aggressive options, but they are also strongly influenced by what role the character they play has in the narrative. The spoiler can upset this. By knowing what may happen players act differently, as well as thinking about the story in other ways than unspoiled players do. 

  • 1421.
    Thorvald, Peter
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre.
    Comparing the use of article numbers to alternate information syntaxes2013In: Proceedings of NES 2013, 45th Nordic Ergonomics & Human Factors Society conference, Iceland, August 2013, 2013Conference paper (Refereed)
    Abstract [en]

    Using article numbers as identifiers in industry is a well-established practice. However, previous investigations have indicated, although failed to confirm, shortcomings in this tradition when used in human based assembly. This paper will report findings from an experimental study where subjects were asked to perform a reaction test designed to test the response to different types of syntaxes. These syntaxes where article numbers (control), symbols, and names of famous figures. Results show that subjects were able to significantly faster identify a trigger and respond accordingly when dealing with triggers with semantic content (symbols and names) than with article numbers.

  • 1422.
    Thorvald, Peter
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre.
    Presenting Information in Manual Assembly2011Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Ever since industrialization, manufacturing companies have competed with each other in trying to make the best and the cheapest product and the automotive industry is definitely no exception. The ‘arms race’ between truck and car manufacturers has pushed manufacturing technology and production practice to where it is today. However, whereas companies have traditionally competed with the engineering excellence and technology of their products, the human effort in production is often neglected. After all, there are still many tasks that require the flexibility and intelligence of a human worker.

    This thesis focuses entirely on the information context of assembly workers. It investigates and discusses their general information behaviour in terms of information need, syntax of information, information sources and technology as well as basic cognitive abilities used to utilize information such as attention and memory. The thesis presents relevant literature on the subject of information behaviour and pinpoints potential hazards of information design in manual assembly. It also identifies three hypotheses that suggest improved productivity and quality of work as a result of certain changes in the information landscape. One hypothesis deals with the layout of information, a second deals with the syntax used to identify parts and a third deals with the information medium used to convey information.

    Analysis of empirical data gathered shows, among other things, that using unstructured and batched information favours productivity of work; using a syntax with semantic content as opposed to traditional article numbers without any semantic content also improves productivity of work; and using a mobile information unit betters the quality of work.

    The purpose of the thesis is to present the beginnings of a road map towards the greater understanding of information presentation in manual assembly. As previous research on this application area has been scarce, it draws upon existing theories found in other sciences, primarily cognitive science and its applications such as Human-Computer Interaction (HCI), information theory and human error.

    􀀁

  • 1423.
    Thorvald, Peter
    et al.
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Brolin, Anna
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Högberg, Dan
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Case, Keith
    Mechanical and Manufacturing Engineering, Loughborough University.
    Using Mobile Information Sources to Increase Productivity and Quality2010In: Proceedings of the 3rd Applied Human Factors and Ergonomics (AHFE) International Conference / [ed] Gavriel Salvendy, Waldemar Karwowski, Louisville: AHFE International , 2010Conference paper (Refereed)
    Abstract [en]

    This paper presents an experimental study made on the use of different kinds of information sources in manual assembly. The general idea is that only the necessary information should be presented to the worker and it should be presented where and when the worker needs it as this is believed to both save time and unload cognitive strain. To account for the latter two aspects of this thought, where and when, this paper investigates the use of a handheld unit as an information source in manual assembly. Having a mobile information system, such as a Personal Digital Assistant (PDA), that can be carried with you at all times, as opposed to a stationary one, such as a computer terminal, is hypothesized to greatly improve productivity and quality. Experimental results show that the use of a PDA significantly improves quality whereas productivity does not significantly improve.

  • 1424.
    Thorvald, Peter
    et al.
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Bäckstrand, Gunnar
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Högberg, Dan
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Technology and Society.
    Case, Keith
    Loughborough University, Loughborough, UK.
    Syntax and Sequencing of Assembly Instructions2012In: Advances in Usability Evaluation: Part II / [ed] Francesco Rebelo & Marcelo M. Soares, CRC Press, 2012, p. 266-275Chapter in book (Refereed)
    Abstract [en]

    Minimalism of design is a concept often found in Human-computer interaction (HCI). It is a concept that emphasizes the presentation of as little information as possible to reduce the perceptual strain and visual search of the subject. However, in a manufacturing context, such as in manual assembly, state of the art information presentation is rarely minimalistic. Rather, organizations tend to push out as much information as possible without necessarily concerning themselves with how this information is presented to, or perceived by, the worker. This leads to a situation that is far from ideal from an HCI perspective, likely to reduce human performance and wellbeing, in turn negatively affecting overall production system performance. Obviously, there are several potential ways of addressing this issue. Perhaps the most evident way is to simply reduce the amount of information that is presented and only present the essentials. This paper will investigate and discuss how information presentation can be minimized without reducing the information content through information syntax and layout.

  • 1425.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Case, KeithUniversity of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre. Loughborough University.
    Advances in Manufacturing Technology XXXII: Proceedings of the 16th International Conference on Manufacturing Research, Incorporating the 33rd National Conference on Manufacturing Research, September 11-13, 2018, University of Skövde, Sweden2018Conference proceedings (editor) (Refereed)
  • 1426.
    Thorvald, Peter
    et al.
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre.
    Högberg, Dan
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre.
    Case, Keith
    University of Skövde, The Virtual Systems Research Centre. Mechanical and Manufacturing Technology, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK.
    Applying cognitive science to digital human modelling for user centred design2012In: International Journal of Human Factors Modelling and Simulation, ISSN 1742-5549, Vol. 3, no 1, p. 90-106Article in journal (Refereed)
    Abstract [en]

    To build software which, at the press of a button, can tell you what cognition-related hazards there are within an environment or a task, is probably well into the future if it is possible at all. However, incorporating existing tools such as task analysis tools, interface design guidelines and information about general cognitive limitations in humans, could allow for greater evaluative options for cognitive ergonomics. The paper discusses previous approaches to the subject and suggests adding design and evaluative guiding in digital human modelling that will help a user with little or no knowledge of cognitive science to design and evaluate a human-product interaction scenario.

  • 1427.
    Thorvald, Peter
    et al.
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre. Loughborough University, United Kingdom.
    Högberg, Dan
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre.
    Case, Keith
    University of Skövde, School of Technology and Society. University of Skövde, The Virtual Systems Research Centre. Loughborough University, United Kingdom.
    Incorporating Cognitive Aspects in Digital Human Modeling2009In: Digital Human Modeling: Second International Conference, ICDHM 2009, Held as Part of HCI International 2009, San Diego, CA, USA, July 19-24, 2009. Proceedings / [ed] Vincent G. Duffy, Berlin Heidelberg: Springer Berlin/Heidelberg, 2009, p. 323-332Conference paper (Refereed)
    Abstract [en]

    To build software which, at the press of a button, can tell you what cognition related hazards there are within an environment or a task, is probably well into the future if it is possible at all. However, incorporating existing tools such as task analysis tools, interface design guidelines and information about general cognitive limitations in humans, could allow for greater evaluative options for cognitive ergonomics. The paper will discuss previous approaches on the subject and suggest adding design and evaluative guiding in DHM that will help a user with little to no knowledge of cognitive science, design and evaluate a human-product interaction scenario.

  • 1428.
    Thorvald, Peter
    et al.
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Engineering Science.
    Högberg, Dan
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Engineering Science.
    Case, Keith
    University of Skövde, The Virtual Systems Research Centre. University of Skövde, School of Engineering Science. Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom.
    The effect of information mobility on production quality2014In: International journal of computer integrated manufacturing (Print), ISSN 0951-192X, E-ISSN 1362-3052, Vol. 27, no 2, p. 120-128Article in journal (Refereed)
    Abstract [en]

    This article investigates the use of a hand-held unit as an information source in manual assembly. Having a mobile information system, such as a Personal Digital Assistant (PDA), that can be brought at all times, as opposed to a stationary one, such as a computer terminal, is hypothesised to increase the information range and thus improves assembly performance. The increased information range is argued to be due to assembly workers employing a cost-benefit strategy, where the cost of gathering information is compared with the assumed benefit of it. This article reports empirical data comparing the use of a mobile information carrier with a traditional stationary computer, and results show that the use of a PDA significantly improves quality, whereas productivity does not significantly improve quality. © 2013 Copyright Taylor & Francis.

  • 1429.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Distributed cognition at work - A systemic perspective on human based manufacturing2015In: Proceedings of ICMR 2015 / [ed] Linda Newnes, Aydin Nassehi & Vimal Dhokia, Bath, UK: University of Bath , 2015, p. 195-200Conference paper (Refereed)
    Abstract [en]

    Cognitive science is becoming increasingly central within human factors & ergonomics and, since at the same time, there has long been a call for a more systemic perspective in the area with a somewhat wider unit of analysis, this paper argues that the theoretical framework of distributed cognition would greatly benefit the area. It would offer a more complete understanding of the user within a greater context, be it social, cultural or materialistic. This paper aims to characterize and analyse the domain of manufacturing as a complex socio-technical system from a distributed cognition perspective; focusing on the use, mediation and integration of different forms of representations, tools and artefacts in this domain.  The paper further proposes and exemplifies benefits of using a distributed cognition framework in the manufacturing domain as studied by human factors and ergonomics.

  • 1430.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Initial development of a cognitive load assessment tool2014In: Advances in Cognitive Engineering and Neuroergonomics / [ed] Kay Stanney & Kelly S. Hale, AHFE , 2014, p. 223-232Conference paper (Refereed)
    Abstract [en]

    Interest in cognitive or mental workload has over the last couple of years increased drastically from a manufacturing application perspective.  More and more, people are becoming aware of the cognitive limitations that may have great impact on production outcome. The more easily observable area of physical ergonomics has been successfully investigated for a long time and it would seem as though focus has broadened to also include cognitive ergonomics. Considering the effects that a large cognitive load has on human performance, knowledge regarding the role of the cognizing human in a manufacturing environment could potentially have significant effect on production outcome (i.e. quality and productivity). With this in mind, developing and using methods and tools for assessment of the cognitive burden associated with particular tasks or workstations should be and is of substantial interest to the manufacturing industry. Whatever assessment methods exist in the scientific literature today are almost exclusively expert tools where significant expertise in the area of cognitive ergonomics/psychology/science is required. This paper reports parts of the development process and initial version of a non-expert tool for assessment of cognitive load in manual production environments, primarily manual assembly.

  • 1431.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Virtual Systems Research Centre.
    Andreasson, Rebecca
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Uppsala Universitet.
    CLAM – A method for cognitive load assessment in manufacturing2017In: Advances in Manufacturing Technology XXXI / [ed] Gao, J., El Souri, M., Keates, S., Amsterdam: IOS Press, 2017, Vol. 6, p. 114-119Conference paper (Refereed)
    Abstract [en]

    The increasing complexity and demands of assembly operations in manufacturing has been shown to lead to increased cognitive load in assembly workers. Previous work has outlined the complexity of an assembly worker’s situation both in terms of difficulty and speed of work and there have been a few attempts at creating frameworks and methods for understanding the key aspects of what creates increased cognitive load. This paper presents a tool for assessing cognitive load in manufacturing, primarily assembly. The paper presents the method and an accompanying tool as well as some insights derived from this method development. The intended contribution of the work is to make a difference in reducing the cognitive load of assembly workers on the shop floor, thus focusing the development on applicability and usability of the tool in practice. 

  • 1432.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Andreasson, Rebecca
    Uppsala University, Department of Information Technology, Uppsala, Sweden.
    On the development of a method for cognitive load assessment in manufacturing2019In: Robotics and Computer-Integrated Manufacturing, ISSN 0736-5845, E-ISSN 1879-2537, Vol. 59, p. 252-266Article in journal (Refereed)
    Abstract [en]

    The increasing complexity and demands of assembly operations in manufacturing has been shown to lead to increased cognitive load in assembly workers. Previous work has outlined the complexity of an assembly worker's situation both in terms of difficulty and speed of work and there have been a few attempts at creating frameworks and methods for understanding the key aspects of what creates increased cognitive load. This paper presents the development of an analytic method, denoted CLAM (Cognitive Load Assessment for Manufacturing), and a tool for assessing cognitive load in manufacturing, primarily assembly. It outlines the journey of the development as well as discusses and problematizes relevant meta-methodological issues paired with method development. The intended contribution of the work is to make a difference in reducing the cognitive load of assembly workers on the shop floor, thus focusing the development on applicability and usability of the tool in practice. With this purpose in mind, focus of the method development has been on the practitioners, i.e. the method should not require any expert knowledge to be applied. The CLAM method and accompanying documentation such as a handbook containing instructions towards using the method and interpreting the results, is available in an online tool.

  • 1433.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre. Chalmers University of Technology, Gothenburg, Sweden.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Kolbeinsson, Ari
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Embodied Interactions in Cognitive Manufacturing2020In: Advances in Neuroergonomics and Cognitive Engineering: Proceedings of the AHFE 2019 International Conference on Neuroergonomics and Cognitive Engineering, and the AHFE International Conference on Industrial Cognitive Ergonomics and Engineering Psychology, July 24-28, 2019, Washington D.C., USA / [ed] Hasan Ayaz, Springer, 2020, p. 419-426Conference paper (Refereed)
    Abstract [en]

    This paper presents a discussion on the role of embodied interaction with a basis in social embodiment effects and how they can be viewed in light of manufacturing ergonomics. The social embodiment effects are four statements, grounded in empirical findings, which highlight the interplay of social stimuli, embodied responses, and cognitive processing. They suggest and base an argument for how embodiment is central to cognitive processing, how bodily states interact extensively with cognitive states, and ultimately how embodied interaction is ubiquitous in human cognition. The paper further presents a view on how human based manufacturing can be studied in light of this argument, exploring other areas where social embodiment has been further researched, with an aim to suggest examples of where social embodiment effects might be found in manufacturing ergonomics and form a basis for future investigations. 

  • 1434.
    Thorvald, Peter
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Schmitz, Sebastian
    FIR at RWTH Achen, Germany.
    Modified pluralistic walkthrough for method evaluation in manufacturing2015In: Procedia Manufacturing, ISSN 2351-9789, Vol. 3, p. 5139-5146Article in journal (Refereed)
    Abstract [en]

    This paper presents a mixed evaluation design including quantitative and qualitative datain order to validate the scope, validity, and reliability of a recently developed CLAM method and tool. A central part of the evaluation was the use of a modified pluralistic walkthroughthat was created to better suit the industrial domain. The evaluation of CLAM was performed in a demonstration factory focusing on manufacturing of street scooters and electric pedal cars. The modified walkthrough was conducted on the shop floor, during on-going assembly, which stresses the representativeness of a real-world setting of manufacturing. The modified pluralistic walkthrough functioned accurately as an evaluation method of CLAM and the exhaustive comments and data from the user representatives were very beneficial. The quantitative results show convicting evidence of CLAM’s utility for assessing cognitive load while the qualitative results indicate that some modifications have to be made in order to enhance the actual tool in order to avoid misinterpretations resulting in misleading outcomes.

  • 1435.
    Tjus, Anna
    et al.
    University of Skövde, School of Technology and Society.
    Johansson, Annie
    University of Skövde, School of Technology and Society.
    A minor field study for combined rainwater andpond harvesting system and purification technology in the village Macedonia, Amazon basin, Colombia2008Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

     

    This study is a bachelor degree project which focuses on the lack of safe drinking water in a small village known as Macedonia in the Amazon basin in Colombia. The inhabitants of the village are 850 to the number and have never had access to safe drinking water. To solve this problem a system has been built where the rainwater is harvested in a pond and also from a church roof

    During the dry season the rainwater in the pond is harvested and pumped into sedimentation tanks. Thereafter, the water is led into the sand filtration tanks. While during the rain season, the rainwater is harvested from a church roof which is situated at highest level in Macedonia. The water is stored in a cistern and then it is led into sand filtration tanks via pipes. This means that the pond water and rainwater are never mixed before entering the filtration tanks.

    The sand filtration tanks contain about 1000 mm thick layer of sand and under it, a layer of gravel which is placed in the bottom of the tank. It takes a while for the water to be filtered through the sand filtration tank. Afterwards, it is led into the final tank, where the drinking water is stored ready to be used.

    The method of using slow sand filtration (SSF) is suitable for small scale-projects and therefore for this project a good idea for making drinking water. SSF requires no mechanical power or replaceable parts, this is why the technique is good for purifying water in developing and isolated areas.

    The result of the system is water with satisfied quality running through pipes and taps, ready to be consumed.

     

     

     

     

  • 1436.
    Tjärnberg, Wilmer
    University of Skövde, School of Informatics.
    Heuristisk Utvärdering av Virtual Reality-Spel2019Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete undersöker hur User Experience Design-utvärderingsmetoden heuristisk utvärdering kunde anpassas till utvärderingen av TV-spel inom kontexten av immersive Virtual Reality. Rapporten börjar med att redogöra för TV-spel, Virtual Reality och User Experience som fält, med särskild fokus på utvärderingsmetoder. En genomgång av tidigare, relevant litteratur och utförandet av heuristiska utvärderingar ledde till skapandet av en lista med heuristiker utformade för immersive Virtual Reality-spel. En manual med riktlinjer för utförandet av utvärderingar inom en Virtual Reality-kontext skapades också. Både heuristikerna och manualen validerades och reviderades utefter resultaten av de heuristiska utvärderingar som utfördes under arbetets gång. Resultaten visade på att heuristisk utvärdering går att använda inom en VR-spelskontext, men att det kräver vissa modifikationer. Detta har implikationer för användandet av andra utvärderingsmetoder i samma kontext.

  • 1437.
    Toftedahl, Marcus
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Engström, Henrik
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A Taxonomy of Game Engines and the Tools that Drive the Industry2019In: DiGRA '19 - Proceedings of the 2019 DiGRA International Conference: Game, Play and the Emerging Ludo-Mix / [ed] Akinori Nakamura, Digital Games Research Association (DiGRA) , 2019Conference paper (Refereed)
    Abstract [en]

    Game engines are a vital part of a game production pipeline, but there is a vagueness of definitions regarding the boundaries of components in a game engine and the rest of the production tools used in a game development pipeline. The aim of this paper is to nuance the use of the term game engine and to put it into the context of a game development pipeline. Based on data from the current state of game production, a proposed taxonomy for tools in game development is presented. A distinction is made between user facing tools and product facing tools. A defining characteristic of the production pipeline and game engines is their plasticity. One of the conclusions is that a “game engine” as a single entity containing the whole game production pipeline is not desirable due to the large number of competences and needs involved in a game development project.

  • 1438.
    Toivonen, Jan
    et al.
    University of Skövde, School of Technology and Society.
    Ljunglöf, Gustaf
    University of Skövde, School of Technology and Society.
    Utveckling av småskaligt vindkraftverk med vertikal rotor2009Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    When more and more people open their eyes for the climate situation of today, the interest increases for renewable energy. Today there are many highly developed wind turbines with a horizontal axis while the vertically rotating type still is under basic development. Most of the wind turbines today are very big and not adapted for private usage. Through research, idea generation and calculations three new types of vertical axis wind turbines have been developed to compete with the wind turbines for private usage on the market.

  • 1439.
    Tokarieva, Anastasiia V.
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Prydniprovska State Academy of Civil Engineering and Architecture, Dnipro, Ukraine.
    Volkova, Nataliia P.
    Alfred Nobel University, Dnipro, Ukraine.
    Harkusha, Inesa V.
    Alfred Nobel University, Dnipro, Ukraine.
    Soloviev, Vladimir N.
    Kryvyi Rih State Pedagogical University, Ukraine.
    Educational digital games: Models and implementation2019In: Cloud Technologies in Education: Proceedings of the 6th Workshop, CTE 2018 / [ed] Arnold E. Kiv, Vladimir N. Soloviev, CEUR-WS , 2019, Vol. 2433, p. 74-89Conference paper (Refereed)
    Abstract [en]

    Nowadays, social media, ICT, mobile technologies and applications are increasingly used as tools for communication, interaction, building up social skills and unique learning environments. One of the latest trends observed in education is an attempt to streamline the learning process by applying educational digital games. Despite numerous research data, that confirms the positive effects of digital games, their integration into formal educational contexts is still relatively low. The purpose of this article is to analyze, discuss and conclude what is necessary to start using games as an instructional tool in formal education. In order to achieve this aim, a complex of qualitative research methods, including semi-structured expert interviews was applied. As the result, the potential of educational digital games to give a unique and safe learning environment with a wide spectrum of build-in assistive features, be efficient in specific training contexts, help memorize studied material and incorporate different learning styles, as well as to be individually adaptable, was determined. At the same time, the need for complex approach affecting the administration, IT departments, educators, students, parents, a strong skill set and a wide spectrum of different roles and tasks a teacher carries out in a digital game-based learning class were outlined. In conclusion and as a vector for further research, the organization of Education Design Laboratory as an integral part of a contemporary educational institution was proposed. 

  • 1440.
    Tomi, Vivian
    et al.
    University of Skövde, School of Technology and Society.
    Zohooryan Izadpanah, Hanieh
    University of Skövde, School of Technology and Society.
    UTVECKLING AV BESLAGSSYSTEM FÖR SANDWICHPANEL: Ett designprojekt i samarbete med Paroc Panel System AB ®2013Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    En av Parocs produkter är sandwichpanel som är ett byggmaterial som kan variera i storlek och tjocklek och är funktionellt och smidigt. Uppdraget var att designa ett beslag för panelsystem som minst 50% av Paroc Panel Systems kunder skulle föredra framför de gamla, främst med avseende på estetiken, men även baserat på lätthet att montera och kostnad av beslaget. Projektet skedde i samverkan med företaget Paroc Panel System AB och ur förundersökningen framkom att utseende, monteringsmöjligheter, egenskaper såsom materials livslängd och hållfasthet och totalkostnad var viktiga krav som ställdes på produkten. Lösningsförslag med fokus på flera viktiga aspekter togs fram och kombinerades till olika koncept med hjälp av en så kallad morfologisk tabell. En konceptutvecklingsfas ingick där hållfasthetsberäkningar och materialval var avgörande. Metoder som DFMA (Design For Manufacturing and Assembly) och LCA (Livscykelanalys) har tagits i beaktande under projektets gång. Detta resulterade i ett nytt beslagssystem med en enkel profil och färre monteringsmoment, något som var viktigt för Paroc Panel System AB. Det nya beslaget hade en gångjärns-liknande fastsättning, vilket innebar att det blev lättare att montera och blev därmed en potentiell konkurrent till dagens beslagssystem.

  • 1441.
    Torkelsson, Olle
    et al.
    University of Skövde, School of Engineering Science.
    Dauksz, Markus
    University of Skövde, School of Engineering Science.
    DFMA: A Methodology Study and Method Development2014Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Volvo Cars Corporation (VCC) is devoted to Lean and Six Sigma, and has lately considered an imple-mentation of Design for Manufacturing and Assembly (DFMA) with the purpose of improving their product design process and production. The goal for this project work is therefore to investigate if DFMA is a beneficial method for VCC to use, how DFMA can be used and suggest a DFMA method.

    A literature study is performed as a starting point to understand DFMA methods and its possibilities. Scientific articles, technical books and online sources is used during the study in order to gather in-formation regarding DFMA implementations, application areas, approaches and potential risks that need to be eliminated for a successful implementation.

    In order to map the product development and manufacturing processes of VCC interviews are per-formed. The interviews also gathered information regarding what VCC employees thinks of DFMA and how they wish to use it. This information is compiled into a demand specification where the de-mands are weighted after importance by the interviewees.

    After the pre-study, three idea generation sessions is performed with three different focus groups. The generated ideas are then evaluated and classified. The remaining ideas are classified with the purpose of enabling the possibility to use a morphological chart to build whole concepts from the single ideas.

    Three concepts are chosen amongst the generated concepts. These concepts are then evaluated against the weighted demand specification. The concept considered most suitable is further devel-oped which resulted in a proposed DFMA method for VCC. A case study on a product is performed in order to communicate, test and evaluate the final DFMA method.

    The project is rounded off with discussions regarding DFMA and the suggested method from sustain-ability point of view and how to motivate usage. All results and discussions from the project are handed over to the company, enabling further research on a possible implementation of DFMA in the organization.

  • 1442.
    Torosian, Rojé
    et al.
    University of Skövde, School of Technology and Society.
    Elmehag, Elin
    University of Skövde, School of Technology and Society.
    Life Cycle Assessment of an Ocean Energy Power Plant: Evaluation and Analysis of the Energy Payback Time with Comparison Between Sweden and Tanzania2013Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Energy is an essential asset in the present society. It is needed for transportation, electricity and heating. Fossil fuels, being a limited reserve, are presently the dominating resource from which energy is being used. As indus-tries and consumers around the world use more energy for each passing day it becomes vital to shed some light on how important it is to decrease the global energy demand. Fossil fuels are needed to be replaced by renewa-ble energy sources, such as solar and wind power, in order to obtain a more sustainable development.When a new product is being developed it is usually important to analyze the potential environmental impact, suggestively by conducting a life cycle analysis, prior to manufacturing. Deep Green, being a tidal energy device for generation of electricity, is a product in its initial developing stage. In this thesis a lifecycle assessment has been conducted of the complete product with the purpose of achieving an analysis of how different choices of materials affect the energy usage, CO2 footprint and the energy payback time. Identifications by comparison have been taken into account to determine which component of Deep Green that contributes mostly to the energy usage and CO2 footprint. In addition to the Life Cycle Assessment, LCA, a digital model, created in an Excel workbook, has been developed to simplify calculations of the energy usage, CO2 footprint and energy payback time. The digital model, namely ENCO©, provides the possibility to interchange choice of materials for each component in order to evaluate the potential environmental impact and the energy payback time. Deep Green consist of 34 different components which are included in the LCA but an initial analysis shows that only twelve specific parts contribute largely to the energy usage and the CO2 footprint. The foundation and the wing structure account for 78 % and 15 % respectively of the energy usage along with ten other parts which together stand for an additional 6 %. Remaining 27 parts share the final percentile. Given the materials provided by the company of Minesto the total energy usage and CO2 footprint for the complete product corresponds to approx-imately 4500 GJ and 342 tonne respectively. The foundation is the part of Deep Green that contributes most to the total environmental impact.Depending on the defined materials for each component the energy payback time varies between 220 to 260 days which is to say that a production of Deep Green would be profitable. Nevertheless the conducted LCA has several delimitations which should be reflected upon prior a final decision is made.The resulted Energy Payback time, EP, should be carefully used and presented with the system boundaries, since they affect the EP very much. The outcome of energy consumption and CO2 footprint, depend highly on the choice of end of life management. Based on the result it is recommended that the foundation is left on the sea-bed at the end of its lifecycle to obtain the best EP.An investigation of whether it is possible to position the complete supply-chain within the boundaries of a de-veloping country, namely Tanzania, has also been conducted along with the LCA. It is believed that most of the raw materials, which are necessary for the manufacturing of Deep Green, are mined in Tanzania. It is however possible to import those materials which are not available within the country. When considering Tanzania, as a point of implementation for Deep Green, the energy payback time will become higher compared to Sweden or England since more components need to be imported which in turn generates an increase of transportation.It is recommended that a new calculation of the EP and the carbon footprint are done when Deep Green is fully developed. ENCO© can advantageously be used for this. It is also recommended that the distribution cables and the installation are included.

  • 1443.
    Torra, Vicenc
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    On the Analysis of Utility and Risk for Masked Data in Big Data: A Small Data Analysis2018In: Frontiers in Artificial Intelligence and Applications: Artificial Intelligence Research and Development / [ed] Zoe Falomir, Karina Gibert, Enric Plaza, IOS Press , 2018, Vol. 308, p. 200-209Conference paper (Refereed)
    Abstract [en]

    Data privacy studies methods to ensure that disclosure of sensitive information does not take place. Masking methods are applied to databases prior to their release so that intruders cannot access sensitive information. Masking methods modify the data reducing its quality. Information loss measures have been defined to evaluate in what extent data is still useful for particular analysis. In the case of big data, masking data and evaluating its utility is a complex problem. In this paper we focus on information loss measurement and we explore if we can estimate or give bounds of information loss for large data sets using only random subsets of the whole data set.

  • 1444.
    Torra, Vicenc
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Some properties of Choquet integral based probability functions2015In: Acta et Commentationes Universitatis Tartuensis de Mathematica, ISSN 1406-2283, E-ISSN 2228-4699, Vol. 19, no 1, p. 35-47Article in journal (Refereed)
    Abstract [en]

    The Choquet integral permits us to integrate a function with respect to a non-additive measure. When the measure is additive it corresponds to the Lebesgue integral. This integral was used recently to define families of probability-density functions. They are the exponential family of Choquet integral (CI) based class-conditional probability-density functions, and the exponential family of Choquet– Mahalanobis integral (CMI) based class-conditional probability-density functions. The latter being a generalization of the former, and also a generalization of the normal distribution.

    In this paper we study some properties of these distributions, and study the application of a few normality tests.

  • 1445.
    Torra, Vicenc
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Transparency and Disclosure Risk in Data Privacy2015In: Proceedings of the Workshops of the EDBT/ICDT 2015 Joint Conference (EDBT/ICDT) / [ed] Peter M. Fischer, Gustavo Alonso, Marcelo Arenas, Floris Geerts, 2015, p. 246-Conference paper (Other academic)
    Abstract [en]

    k-Anonymity and differential privacy can be considered examples of Boolean definitions of disclosure risk. In contrast, record linkage and uniqueness are examples of quantitative measures of risk. Record linkage is a powerful approach because it can model different types of scenarios in which an adversary attacks a protected database with some information and background knowledge. Transparency holds in data privacy when data is published together with details on their processing. This includes the data protection method used and its parameters. Intruders can use this information to improve their attacks. Specific record linkage algorithms can be defined to take into account this information, and to define more accurate disclosure risk measures. Machine learning and optimization techniques also permits us to increase the  effectiveness of record linkage algorithms. This talk will be focused on disclosure risk measures based on record linkage. We will describe how we can improve the performance of the algorithms under the transparency principle, as well as using machine learning and optimization techniques.

  • 1446.
    Torra, Vicenc
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Transparency and microaggregation2015In: UNECE SDC 2015, 2015Conference paper (Other academic)
    Abstract [en]

    Transparency has an important effect on disclosure risk. In general, masking methods have to be evaluated taking into account that intruders can use all available information to attack the data. When the masking method as well as their parameters are disclosed, this information can also be used by an intruder. In this talk we will review results on the effects of transparency in disclosure risk assessment for microdata giving special emphasis to microaggregation.

  • 1447.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    A fuzzy microaggregation algorithm using fuzzy c-means2015In: Artificial Intelligence Research and Development / [ed] Eva Armengol, Dionís Boixader, Francisco Grimaldo, IOS Press, 2015, p. 214-223Conference paper (Refereed)
    Abstract [en]

    Masking methods are used in data privacy to avoid the disclosure of sensitive information. Microaggregation is a perturbative masking method that has been proven effective. Data masked using microaggregation can be attacked when the intruder has information of the masking method and the parameters used. Publishing this information is usual under the transparency principle. Fuzzy microaggregation was introduced a few years ago to avoid this type of transparency attacks. In this paper we propose a new simpler method for microaggregation based on fuzzy c-means. We discuss the effectiveness of the approach. One of the advantages of this approach is its computational complexity.

  • 1448.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Derivation of Priorities and Weights for Set-Valued Matrices Using the Geometric Mean Approach2015In: Applied Artificial Intelligence, ISSN 0883-9514, E-ISSN 1087-6545, Vol. 29, no 5, p. 500-513Article in journal (Refereed)
    Abstract [en]

    Priorities are essential in the analytic hierarchy process (AHP). Several approaches have been proposed to derive priorities in the framework of the AHP. Priorities correspond to the weights in the weighted mean as well as in other aggregation operators as the ordered weighted averaging (OWA) operators, and the quasi-arithmetic means.

    Derivation of priorities for the AHP typically starts by eliciting a preference matrix from an expert and then using this matrix to obtain the vector priorities. For consistent matrices, the vector of priorities is unique. Nevertheless, it is usual that the matrix is not consistent. In this case, different methods exist for extracting this vector from the matrix.

    This article introduces a method for this purpose when the cells of the matrix are not a single value but a set of values. That is, we have a set-valued preference matrix. We discuss the relation of this type of matrices and hesitant fuzzy preference relations.

  • 1449.
    Torra, Vicenç
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    On the selection of m for Fuzzy c-Means2015In: Proceedings of the 2015 Conference of the International Fuzzy Systems Association and the European Society for Fuzzy Logic and Technology / [ed] José M. Alonso, Humberto Bustince & Marek Reformat, Paris: Atlantis Press , 2015, p. 1571-1577Conference paper (Refereed)
    Abstract [en]

    Fuzzy c-means is a well known fuzzy clustering algorithm. It is an unsupervised clustering algorithmthat permits us to build a fuzzy partition from data. The algorithm depends on a parameter m whichcorresponds to the degree of fuzziness of the solution. Large values of m will blur the classes andall elements tend to belong to all clusters. The solutionsof the optimization problem depend on theparameter m. That is, different selections of m willtypically lead to different partitions. In this paper we study and compare the effect ofthe selection of m obtained from the fuzzy c-means.

  • 1450.
    Torra, Vicenç
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Guillen, Montserrat
    Department of Econometrics, Riskcenter-IREA, University of Barcelona, Spain.
    Santolino, Miguel
    Department of Econometrics, Riskcenter-IREA, University of Barcelona, Spain.
    Continuous m-dimensional distorted probabilities2018In: Information Fusion, ISSN 1566-2535, E-ISSN 1872-6305, Vol. 44, p. 97-102Article in journal (Refereed)
26272829303132 1401 - 1450 of 1614
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