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  • 1.
    Léb Lehrman, Susanne
    et al.
    Linköping University, Department of Behavioural Sciences and Learning.
    Algebrant, Marita
    Linköping University, Department of Behavioural Sciences and Learning.
    "Jag är inte tyst och jag kan höja rösten"2008Independent thesis Advanced level (degree of Magister), 15 points / 22,5 hpStudent thesis
    Abstract [sv]

    Studien undersöker hur kvinnliga chefer inom offentlig sektor upplever sina möjligheter och hinder i karriären . Kvinnor i maktposition har motsägelsefulla roller vilket i sig kan upplevas som ett dilemma.

    Sex kvinnor på höga chefspositioner inom en offentlig sektor i Sverige deltog. Intervjuer genomfördes med en semistrukturerad intervjuguide baserad på följande områden: struktur, interaktion, individrelatering och symboler. Intervjuguidens struktur och analysen av intervjuerna baserades på en könsteoretisk modell enligt doing gender perspektiv. Doing gender perspektivet användes för att beskriva de praktiker som var av betydelse för den maktstruktur som fanns i organisationen.

    Analysen av de könsskapande processer som påvisades i organisationen, visade att det främst var värdering av kunskap, värdering av kvinnligt och manligt ledarskap och förutsättningarna för att utföra ledarskapet som utgjorde hinder eller möjligheter för kvinnornas karriär. Organisationen, med dess konserverade hierarkiska system, var också en barriär för kvinnorna.

  • 2.
    Björkman, Anders
    Linköping University, Department of Computer and Information Science.
    Architecture for a remote diagnosis system used in heavy-duty vehicles2008Independent thesis Advanced level (degree of Master), 20 points / 30 hpStudent thesis
    Abstract [en]

    The diagnosis system of a Scania vehicle is an indispensable tool for workshop personnel and engineers in their work. Today Scania has a system for fetching diagnostic information from field test vehicles remotely and store them in a database, so called remote diagnosis. This saves the engineers much time by not having to visit every vehicle. The system uses a Windows based on-board PC in the vehicle called an Interactor. The Interactor has a telematic unit for communication with Scanias Fleet Management System and the CAN-bus in the vehicle. In the next generation of the Interactor, its telematic unit is to be replaced by a Linux based telematic unit called the Communicator 200 (C200). The purpose of this master project is to create a new architecture for a remote diagnosis system that uses the new telematic unit Communicator 200.


    The thesis gives an analysis of the current remote diagnosis system used at Scania and proposes an architecture for a new generation remote diagnosis system using the C200. Also a system for demonstrating how to perform remote diagnosis over the C200 has been built. The thesis describes the operation and how the demonstration system was implemented.

  • 3.
    Gullberg, Erik
    Linköping University, The Department of Physics, Chemistry and Biology.
    Construction of a system for heterologous production of carbonic anhydrase from Plasmodium falciparum in Pichia pastoris2008Independent thesis Advanced level (degree of Master), 20 points / 30 hpStudent thesis
    Abstract [en]

    Malaria is one of the biggest current global health problems, and with the increasing occurance of drug resistant Plasmodium falciparum strains, there is an urgent need for new antimalarial drugs. Given the important role of carbonic anhydrase in Plasmodium falciparum (PfCA), it is a potential novel drug target. Heterologous expression of malaria proteins is problematic due to the unusual codon usage of the Plasmodium genome, so to overcome this problem a synthetic PfCA gene was designed, optimized for expression in Pichia pastoris. This gene was also modified to avoid glycosylation, and cloned into the vector pPICZαA under the control of the methanol inducible promoter AOX1. To facilitate export of the protein into the growth medium, the gene was fused in-frame with the α-factor secretion signal from Saccharomyces cerevisiae. The construct was successfully integrated in the genome of P. pastoris GS115, and attempts were made to express the protein and purify it using immobilized metal ion affinity chromatography.In this work, no expression of the PfCA protein could be detected, so further research should focus on optimization of expression conditions, or redesign of the expression vector.

  • 4. Nors, Niclas
    et al.
    Rehnström, Tom
    Linköping University, Department of Electrical Engineering.
    SMS-baserat alarm med positionering: GPS based alarm with positioning2008Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The study investigates how to design a low-cost, versatile event messaging system using SMS. A typical use case is a fire alarm or intrusion detector when equipped with appropriate sensors. With a GPS receiver connected, the actual position is included in the message, allowing for use as theft alarm in e.g. a car or in mobile home.

  • 5.
    Blomfeldt, Anders
    et al.
    Linköping University, Department of Electrical Engineering.
    Haverstad, Rasmus
    Linköping University, Department of Electrical Engineering.
    Sensorfusion av GPS och IMU för en racingtillämpning2008Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    AIMS AB is a Swedish company that develops and sells inertial sensor systems. A new product is under research which basically is an aided inertial navigation system where unwanted drift is eliminated. This can be done by integrating a GPS reciever into the system and fuse measurement data from GPS and IMU. Such a product is useful in racing, where engineers always are searching for the optimal performance and the shortest lap times. Today the only feedback the engineers and mechanics get from their work is the driver’s comments and lap times. It would be of great help if it was possible to see the behaviour of the car directly in technical terms. The focus of this master thesis is fusing a GPS receiver and an IMU using an Extended Kalman Filter (EKF). The main task of the EKF is to estimate the errors of the intertial measurements and correct the measurements to eliminate drift in velocity and position. To verify the system, data collection was done togheter with the team G2 Racing and Tony Ring. The measurements were done in Tony’s Ferrari F430 Pista during two days at the Paul Ricard circuit in southern France. From the results possibilites to further estimate interesting entities were evaluated.

  • 6.
    Falk, Conny
    et al.
    Linköping University, Department of Management and Engineering.
    Blomkvist, Andreas
    Linköping University, Department of Management and Engineering.
    Flexibla fixturer i bearbetande maskiner2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    This thesis was conducted at Linköping University and Saab Aerostructures DPS, Linköping, and focuses on the possibilities of flexible fixturing in machining applications. The thesis is part of the research project "Koofix", which is collaboration between Linköping University and a number of companies.

    The thesis is aimed towards small batch production which, for Saab Aerostructures DPS, means diverse part geometry and that parts are manufactured in very small numbers, sometimes just one piece. The result of this is that expensive dedicated fixtures are made for most parts. By introducing more flexible fixturing methods to this kind of production the cost of fixtures and tooling will be reduced, and make the production more efficient.

    New flexible fixturing methods has been presented and evaluated through the thesis, which has resulted in three different concepts. These concepts have been the result of literature screening and study of current manufacturing process at Saab Aerostructures DPS. The concepts has been evaluated according to there ability to meet Saab Aerostructures DPS needs and a final concept has been chosen. The concept that is considered being the best solution employs an adjustable frame to encompass several different part geometries. This concept allows the workpiece to be machined in a single step and the fixture can be adjusted to fit workpieces with different geometries. On other concept considered in the thesis employs electromagnet with adjustable elements and is capable of fixing more complex geometries. The concept also allows the fixture to be adjusted between different products to be machine by the CNC-machine itself. Also a concept that’s not a fixture itself but a method that allows a simpler fixture to be used has been developed. This concept uses adhesives to combine extra material to the part, which allows for less complex fixtures to be used in the machining process.

    The concepts with the adjustable frame and the electromagnet and adjustable elements are both using the machines control system to locate the detail by probing before the machining process starts. Probing is done by equipping the spindle with a touch trigger probe which measures pre-programmed contact points and calculates exact part position.

  • 7.
    Warth, Benedikt
    Linköping University, The Department of Physics, Chemistry and Biology.
    Design and Application of Software Sensors in Batch and Fed-batch Cultivations during Recombinant Protein Expression in Escherichia coli2008Independent thesis Advanced level (degree of Master), 20 points / 30 hpStudent thesis
    Abstract [en]

    Software sensors are a potent tool to improve biotechnological real time process monitoring and control. In the current project, algorithms for six partly novel, software sensors were established and tested in a microbial reactor system. Eight batch and two fed-batch runs were carried out with a recombinant Escherichia coli to investigate the suitability of the different software sensor models in diverse cultivation stages. Special respect was given to effects on the sensors after recombinant protein expression was initiated by addition of an inducer molecule. It was an objective to figure out influences of excessive recombinant protein expression on the software sensor signals.

    Two of the developed algorithms calculated the biomass on-line and estimated furthermore, the specific growth rate by integration of the biomass changes with the time. The principle of the first was the application of a near infrared probe to obtain on-line readings of the optical density. The other algorithm was founded on the titration of ammonia as only available nitrogen source. The other two sensors analyzed for the specific consumption of glucose and the specific production of acetate and are predicted on an in-line HPLC system.

    The results showed that all software sensors worked as expected and are rather powerful to estimate important state parameters in real time. In some stages, restrictions may occur due to different limitation affects in the models or the physiology of the culture. However, the results were very convincing and suggested the development of further and more advanced software sensor models in the future.

  • 8.
    Axelsson, Lisa
    Linköping University, Department of Science and Technology.
    Studie av nyttan med teknisk dokumentation tillgänglig på handdator - utveckling av prototyp2008Independent thesis Advanced level (degree of Master), 20 points / 30 hpStudent thesis
    Abstract [sv]

    På sektionen Flygsystem/Teknik på Saab Aerotech har man gedigen erfarenhet av att ta fram underhållsinstruktioner för försvarsmaktens flygande system. En mängd olika typer av underhållsinstruktioner produceras inom avdelningen. Volymen på instruktionerna är stor och revisionsfrekvensen på olika delar varierar mellan 20 gånger per år till en gång var 18:de månad. Gemensamt för alla är att de presenteras och distribueras i tryckformat. Försvarsmakten har börjat digitalisera distributionen, men då instruktionen ska användas skrivs den ut på papper.

    Nu finns tekniken för att göra underhållsinstruktionerna mer intelligenta ur användarens perspektiv. Alltså att ge användaren ett effektivare och bättre verktyg. För sektionen är det mycket viktigt, inte minst ur affärssynpunkt, att följa med i teknikutvecklingen. Det är också viktigt att erbjuda kunden en produkt där all information som kan behövas finns samlad på ett smidigare sätt än i dagens system.

    Syftet med det här examensarbetet är att undersöka hur en publikation kan utvecklas och förbättras genom att utnyttja interaktivitet och multimedia; beskriva vilka krav produktionen av en sådan publikation ställer på hårdvara, mjukvara och personalkompetens; samt slutligen ta fram en prototyppublikation för handdator.

    Idéer om hur prototypen skulle kunna se ut utvecklades genom en användarcentrerad metod. Både slutanvändarna av publikationen samt producenterna av den analyserades liksom de bägge gruppernas uppgifter. Dessa idéer renodlades och prototypen utvecklades. Resultatet är en prototyp för hur en digital publikation kan se ut samt en beskrivning av vilka möjliga fördelar den ger användarna.

    Resultaten av analysen och erfarenheterna från prototyparbetet ledde fram till en idé om hur en utvecklingsprocess för strukturerad teknisk information kan se ut, samt vilka krav detta kommer att ställa på utvecklarna.

  • 9.
    Guzainuer, Maimaitiyiming
    Linköping University, Department of Mathematics. Linköping University, The Institute of Technology.
    Boundary Summation Equation Preconditioning for Ordinary Differential Equations with Constant Coefficients on Locally Refined Meshes2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis deals with the numerical solution of ordinary differential equations (ODEs) using finite difference (FD) methods. In particular, boundary summation equation (BSE) preconditioning for FD approximations for ODEs with constant coefficients on locally refined meshes is studied. Firstly, the BSE for FD approximations of ODEs with constant coefficients is derived on a locally refined mesh. Secondly, the obtained linear system of equations are solved by the iterative method GMRES. Then, the arithmetic complexity and convergence rate of the iterative solution of the BSE formulation are discussed. Finally, numerical experiments are performed to compare the new approach with the FD approach. The results show that the BSE formulation has low arithmetic complexity and the convergence rate of the iterative solvers is fast and independent of the number of grid points.

  • 10.
    Bäckström, Anna
    et al.
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Wändin, Louise
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Spatial Hypertext Editing Tools for Wiki Web Systems2005Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis considers the provision of comprehensible and interpretable tools in the wiki web system. This implies that an extensive research has been made upon the system, i.e., a hypertext system at the Spatial Information Architecture Laboratory (SIAL) at RMIT University in Australia. The process to develop these tools is based on certain requirements due to the user.

    The wiki web system is becoming more and more common in communities, projects, education etc. Companies provide wiki systems to share project information as an online collaborative tool. Another way of using a wiki is as an encyclopaedia. This is currently done in Wikipedia which has been an online wiki encyclopaedia since 2001. This solution is an exceptional way to extract and share information quickly.

    The problem in a wiki is to get an interpretable overview of the whole system, as well as to organise the pages and the structure of the pages in a fine way. The problem is that the number of wiki pages, which are represented as hyperlinks in the system, quickly grown. Therefore, the user needs to be able to navigate within the system and this will require a map.

    The proposed solution is to provide such a map, namely, a global view of the system. Likewise, the user needs to be able to organize the information, and this will require special tools. The proposed solution is to provide such tools, namely, split and merge tools. In order to develop these tools, direct manipulation and usability should be taken into consideration

  • 11.
    Eriksson, Susanne
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Kvalitetsprocesser för Lagring och Distribution av Livsmedel på Schenker Coldsped2005Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of the thesis is to make plans for how Schenker Coldsped should act to meet customer demands, in this case from Burger King, for the use of EFSIS standards (European Food Safety Inspection Service).

    EFSIS offers independent third party inspection services specially designed for food, beverage and related industries. The standard Schenker Coldsped aims to certify to is the

    EFSIS technical standard for the storage and distribution of foodstuffs. Coldsped is a part of Schenker Sverige AB. The company offers total solutions for transportation and storage of refrigerated and frozen products all over Europe. Coldsped has a total of 800 refrigerated vehicles and also offer storage of refrigerated and frozen products as well as product refinement such as preparation, thawing, sawing, packaging and labelling.

    To be allowed to handle foodstuffs, companies in Sweden are obligated to enact selfregulation applicable to their line of business. This supervision shall include a HACCPplan, which is a system for identifying, assessing and controlling risks of importance to food safety.

    By introducing the EFSIS technical standard for the storage and distribution of foodstuffs at Coldsped establishments, routines and knowledge will be documented. Consequently staff knowledge will be incorporated in the company’s ISO9001:2000 system, Isopeq, as well as being available in files in the corresponding department. A first step towards the implementation of EFSIS is the decision to incorporate the HACCP-plan into Isopeq, the company’s quality system.

    Advantages of working to the EFSIS technical standards are:

    •A safer handling of foodstuffs

    •More documented systems

    •A more effective organisation

    •A more effective and clear communication with new customers

    •Increased competitiveness My recommendation is to implement changes in line with my plan. This calls for:

    • Investment in existing plants

    •Personnel resources for the process

    •Planning the implementation in detail by coordinating resources

    •Join the CIES (an independent network for companies handling food) for benchmarking

  • 12.
    Karlsson, Johan
    et al.
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Selegård, Mikael
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Rendering Realistic Augmented Objects Using a Image Based Lighting Approach2005Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Augmented Reality (AR), the combination of real and virtual worlds, is a growing area in computer graphics. Until now, most of the focus has been on placing synthetic objects in the right position with regards to the real world, and to explor the possibilities of human interaction within the two worlds. This thesis presents the fact that virtual objects must not only be placed correctly but also lit truthfully in order to achieve a good degree of immersion. Conventional rendering techniques such as ray-tracing and radiosity requires intensive calculations and preparations for satisfying results. Hence, they are less usable for AR that demands calculations to perform in real time. We present a framework for rendering the synthetic objects using captured lighting conditions in real time. We use improved standard techniques for shadowing and lighting that we adapt for the use in a dynamic AR system as well as recent techniques of image based lighting.

  • 13.
    Larsson, Lina
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Kliniskt datainsamlingssystem med beslutsstöd - Användarutredning och gränssnitt för Sahlgrenskas akutintag2005Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

     Extra high requirements are made on all systems in health care that they are functional and usable,´something, however, that is not always the case. At Emergency Admissions at Sahlgrenska University´Hospital many systems are in use at the same time and it happens that much overhead is caused by having to fill in the same information in different places. In addition, data that is gathered is to a large extent saved in free text format, which means that it cannot be used in a larger context such as research, quality control or for decision support. Data is saved in the patient file only for the treatment process of the individual patient.

    A data collecting system with decision support functionality could be a first step towards reducing Emergency Admissions’ costs and patients’ waiting times by providing a structured method of data collection. It is also possible that it could contribute to safer care for patients as the system could warn the staff on occasions where there may be a risk of a patient suffering from a serious, acute illness that might be difficult to diagnose.

    An analysis has been performed at Emergency Admissions at Sahlgrenska to distinguish possible users of a new system for collecting data with decision support. The results showed that the nurses in reception were the most suitable target group.

    A prototype of a user interface for gathering initial patient data at reception has been made at Emergency Admissions at Sahlgrenska. This prototype has decision support functionality for ranking the most probable diagnoses as well as providing advice on suitable tests and examinations to perform. The focus has been on usability and on adapting the system to the needs of the users.

    It is highly important that future users, the staff at Emergency Admissions, continue to participate in the future further development of the data gathering system so that their needs and requirements are not overshadowed by the new technology.

  • 14.
    Wiklund, Patrik
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, The Institute of Technology.
    Kretsloppsanpassat energi- och avloppssystem för ett fritidshus2013Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [sv]

    En genomsnittlig villa på 149 m² i Sverige med direktverkande el för uppvärmning använder ungefär 23980 kWh el per år. Av detta så står uppvärmningen för ungefär 13480 kWh, eller 90,5 kWh/m². Att minska denna energianvändning är gynnsamt både för miljönoch ekonomin.Genom att utrusta ett hus på ungefär 161 m² med energisnål utrustning, luftvärmepumpar, bra isolering, ett effektivt ventilationssystem och solfångare så kan elanvändningenminskas med ungefär 20170 kWh per år, till en användning på ungefär 4900 kWh per år.Vad uppvärmningen beträffar så är detta en minskning från 14570 kWh (90,5kWh/m²) till ungefär 1400 kWh (9,4 kWh/m²). Skulle huset användas som ett fritidshus under åtta månader per år, så skulle elanvändningen bara hamna på ungefär 2500 kWh, vilket iförhållande till den uppskattade energianvändningen på 10035 kWh för motsvarande tidsperiod innebär en minskning på ungefär 7535 kWh. För värmens del så innebär detta en minskning från 3035 kWh (18,85 kWh/m²) till ungefär 256 kWh (1,6 kWh/m²).Varmvatten kan fås från solfångare. Om huset används under de åtta soligaste månaderna så skulle varmvattenbehovet nästan helt täckas med fyra solfångare av typ DAC-H 150L. Det som inte täcks av solfångarna kan en elektrisk varmvattenberedare täcka.För att ta tillvara på näringsämnena i toalettavfallet så kan en separationstoalett användas.En bonde som tar hand om toalettavfallet och använder det som gödning skulle tjäna ungefär 330 kr för varje person vars närsalter bonden omhändertar. Om skörden är god så motsvarar detta 9900 kr/ha. Det är mer än vad själva skörden ger.För att rena vattnet från bad, dusch och tvätt (BDT-vatten) så kan en IN-DRÄN infiltrationsbädd användas. Denna kommer att rena BDT-vattnet från närsalter, i de flesta avseenden bättre än ett kommunalt reningsverk. Om träd planteras runt biobädden så kande även rena vattnet från de närsalter som inte renas av biobädden, som annars skulle kunna orsaka övergödning.En stor del av elbehovet skulle kunna täckas med ett solcellssystem. Med ett system med 36 st solpaneler av typ PPAM Paladium, och en växelriktare av typ Sunny Tripower 8000 TL så skulle det produceras ungefär 7600 kWh/år. Det finns även möjlighet att få statligt solcellsstöd på upp till 45% av investeringskostnaden. Det innebär att bara 55% av priset behöver betalas med egna pengar. Dessutom så kan överskottet som solpanelerna producerar säljas.Den totala kostnaden för att energianpassa huset skulle uppskattningsvis hamna på ungefär 439100 kr utan solcellsstöd, samt 368100 kr med solcellsstöd. Då antas det att ingen mängdrabatt fås och att priserna inte är nedprutade. Det kan alltså potentiellt bliännu billigare än beräknat.Om solcellsstöd kan fås så är det fördelaktigt att ingå avtal om mikroproduktion med Vallentuna Energi, som tillämpar nettodebitering. Om huset är bebott året om så blir den uppskattade payback-tiden 6 år, och NPV-värdet blir 654966 kr. Om huset bara är bebott under åtta månader så blir motsvarande siffror 9,9 år respektive 231383 kr. Notera att dessa siffror gäller då det energianpassade huset jämförs med ett vanligt hus meddirektverkande el.Om solcellsstöd inte kan fås så är det bättre att ingå avtal om mikroproduktion med Telge Energi. De tillämpar inte nettodebitering, men de köper överskottselen för ett mycket fördelaktigt pris på 2,5 kr/kWh om solcellsstöd inte har erhållits. Om huset är bebott året om så blir den uppskattade payback-tiden 6,4 år och NPV-värdet blir 642716 kr. Om huset är bebott under åtta månader så blir siffrorna istället 10,2 år och 179914 kr.

  • 15.
    Eidehall, Andreas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Lane Game: Lane Guidance Systems Are Now Emerging onto the Vehicle Market2005In: Traffic Technology International, ISSN 1356-9252, 40-42 p.Article in journal (Refereed)
    Abstract [en]

    This article describes the difficulties in developing an automotive lane guidance system, as well as Volvo's possible solution. Lane guidance aims to keep drivers from drifting into another lane by monitoring lane markings with a vision system that alerts the driver with an audio warning, a vibration, or a small amount of steering wheel torque to keep the vehicle in the lane. The difficulties in making such systems work, however, are many: false alarms when changing lanes intentionally, curve cutting by drivers, or driver reliance on a system while they changed CDs or checked text messages. The article describes in detail how Volvo is evaluating a system that shows promise.

  • 16.
    Fransson, David
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Berlin, Niklas
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Hur man designar ett gränssnitt för karaktärseditering2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Inom vissa typer av tv- och datorspel, t.ex. rollspel, sportspel, äventyrsspel eller livssimulatorer, är det vanligt att spelaren själv får utforma sin karaktär (den användaren spelar som i spelet) i varierande utsträckning. Det kan handla om att kunna skriva in sitt eget namn eller välja färg på sin tröja, ända till att kunna justera de minsta utav ansiktsdrag och välja mellan flera olika personlighetsval, fysiska egenskaper och speciella förmågor. Det gränssnitt i vilket detta sker plats kallar för karaktärseditor.

    Ett urval av kommersiellt framgångsrika, etablerade, tv- och datorspel valdes ut och deras karaktärseditorer granskades. Först genom en konkurrent- och greneanalys. Denna analys ger en bild över vilka komponenter karaktärseditorerna består av, vad deras syfte är och vad komponenterna i sin tur består av. Man får ett resultat i tabellform som visar vilka komponenter de olika editorerna har gemensamt, vilka som skiljer sig åt samt hur de löst ett givet problem. Sedan användes heuristisk analys för att igen gå igenom karaktärseditorerna men den här gången rikta fokus mot användbarheten. Det betyder att funktionaliteten testas emot ett antal kriterier som alla innebär ett mer behagligt användande. Genom detta får man fram brister och moment som skapar frustration i systemen så att man i en omdesignprocess kan åtgärda dem. Dessa analyser som förstudie gav en god grund att stå på för en omdesignprocess. Slutsatserna som drogs av den inledande analysfasen ställdes även upp i punktform som tumregler. Dessa tumregler är grund till generell god design inom ett gränssnitt och kan användas av utformare av system. De är en del av resultatet av det här arbetet och ligger till grund för den andra delen av resultatet.

    Vidarearbetandet inleddes med en Design Space Analys där man väger olika desiglösningar på ett visst problem emot varandra likt en argumentationsprocess. Majoriteten av dessa designval rörde sig om Design Mönster (design patterns), vilket är olika, konventionella, redan exiterande designlösningar för t.ex. navigering, input från användaren och layout. När komponenterna som skulle användas stod klart så inleddes en skissningsprocess, först en brainstormande och experimenterande fas och sedan en avsmalnande och strukturerande fas. Skissarbetet mynnade ut i en Wireframe vilket är en modell med så mycket visuella uttryck som möjligt bortskalade för att man endast skall se till funktionaliteten. På denna Wireframe utfördes sedan användartester. Användarna skulle lösa vissa uppgifter i karaktärseditorn. Deras framgång bedömdes och sammanställdes sedan. Resultaten från användartesterna visade att det fortfarande fanns vissa otydligheter i systemet samt att vissa element borde tänkas om. Dessa förändringar åtgärdades och ledde slutligen till slutprodukten, en prototyp som visar en applicering av det färdiga systemet utformat efter tumreglerna.

  • 17.
    Nordh, Nordh
    Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.
    En lågeffektsmodul för markfuktsmätning med fokus på Bluetooth2012Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [sv]

    I detta projekt har ett strömsnålt mätsystem utvecklats. Systemet klarar att mäta markfukt under långa tider utan underhåll. Olika sensorer kan kopplas in till en huvudenhet, sensordata loggas på ett minneskort och kan sedan läsas av från en PC.

    Programmet till PC:n är utvecklat under projektet. Detta program kan läsa av realtidsklockans tid för att kontrollera att denna överensstämmer med PC:ns klocka. Programmet kan även tömma minneskortet via bluetooth och ladda ner all data som finns på minneskortet. PC:n har möjlighet att synkroniserar huvudenhetens realtidsklocka.

    Systemet drivs i sin helhet av solenergi genom solceller vilket gör att enheterna inte behöver något batteri för att klara av mätningar. Med hjälp av superkondensatorer som laddasupp under dagen kan man driva realtidsklockan under hela natten så att klockan inte stannar. Minneskortet är så stort att avläsning av enheten inte behöver ske på flera år. Då avläsning sker är bluetoothenheten väldigt snabb så väntetiden att tömma minneskortet är kort.

  • 18.
    Malmström, Therese
    et al.
    Linköping University, Department of Social and Welfare Studies, Health, Activity, Care. Linköping University, Faculty of Health Sciences.
    Svedjeholm, Sanna
    Linköping University, Department of Social and Welfare Studies, Health, Activity, Care. Linköping University, Faculty of Health Sciences.
    Heteronormativitet – en begreppsanalys: ”Alla är både offer och supportrar av systemet”2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The concept heteronormativity was used in the literature for the first time in 1993. This term can be found in dictionaries and encyclopedias from 2006 but only in a few of the most modern publications. The term currently lacks an exact definition. The aim of concept analysis is to identify characteristics for a term by studying its use. Healthcare relations can and should be developed into a caring relation, which is dependent on a connection involving body, mind and soul between the caregiver and the patient. The aim of this work was to describe and deepen the understanding of the term heteronormativity from a healthcare perspective. Rodgers’ evolutionary concept analysis of 23 scientific papers and common newspapers resulted in seven defined attributes: assumptions, norms, social hierarchies, sanctions for those deviating from the norm, gender roles, sexual relationships and stereotype family apprehension. The analysis also identified what precedes the concept, two women working with the concept and five related concepts: equality, gender, power, discrimination and homophobia. A number of consequences of which all were negative for both individuals and the society were found. Healthcare is negatively influenced in several ways by heteronormativity rendering the caring relation impossible. Conclusion: Heteronormativity leads to a number of problems and everyone are both victims and supporters of the system.

  • 19.
    Ardi, Sonay
    Linköping University, Department of Computer and Information Science. Linköping University, Faculty of Arts and Sciences.
    Quality of Life of Elderly People in Iran: With Sevice Design Approach2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In the aging world of today, more attentions are grabbed towards studies on elderly. New facilities and technologies are emerged to serve to the elderly, maketheir life easier, better and more useful. Having participated in a study on thequality of life of the elderly in Europe, it was aimed to run a similar project toresearch the quality of life of the elderly in a Non-EU country. This was donethrough the research questions “What is the quality of life for them?” and “Howa designer, focused on service design, can improve their quality of life?”The knowledge for the study was obtained from fields Quality of Life of ElderlyPeople, Service Design, Service Design Process, and Qualitative Research. As thekey country for this study, Iran was chosen. Study on the target group in thiscountry was done through Cultural Probes and in analyzing the probes, Processfor Empathy in Design was used. To visualize the results of the target group study,Affinity Diagrams and Personas were drawn.The result was designing a service for the target group, which is presented byConcept Scenario, Storyboards, System Maps and Blueprints. In this concept,called “Virtual Family”, the personas are encouraged to be members of a networkwhich is supported by an organization/community in terms of health, social life,leisure activities and educational programs. This network is forming a virtualfamily regarding the traditional values and ethics which are important for thisage group. Additionally it supports them with entertainment and educationalprograms. Later on, the service concept was evaluated by a number of people inthe same age and social group of the target group. Evaluators found the conceptan excellent complement for mentioned target group who are on the verge oflosing their family and social structure, but the organizational system of the contextcountry should be studied to know if it is planning is practical in that context.

  • 20.
    Linnefell, William
    Linköping University, Department of Management and Engineering, Political Science. Linköping University, Faculty of Arts and Sciences.
    Framväxt och utveckling av radikala högerpopulistiska partier i norden: En jämförelse mellan Sverigedemokraterna och Sannfinländarna2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Populism has been an integral part of the Finnish political system since the late 1950's. At that time the Agrarian Populist Party, better known as The Rural Party, emerged and thrived for decades until the party financially broke down in the 1990's. Reemerging on the political scene as the True Finns, the party is more radical and more influential than ever, gaining enough support to be the third largest party of the 2011 parliamentary election. Sweden, Finland’s neighbor, in contrast has a history with very little populist presence or radical right populist parties (RRP-parties). However, during the 2010 parliamentary election the Sweden Democrats attained seats in the parliament for the first time in history.

    In this thesis, these cases, with their different historical backgrounds, are analyzed to explain the rise and growth of RRP-parties. Many political scientists have tried to answer this question before, focusing on system-oriented and contextual factors, but often neglecting factors that incorporate the political actors themselves. What this thesis adds to the previous research is a perspective on the rise and growth of RRP-parties based on the dynamism between system-oriented factors and actor-oriented factors.

    The theoretical discussion indicates that some system-oriented and contextual factors are significant when explaining the rise and growth of RRP-parties. At the same time, actor oriented factors such as the legacy of the RRP-party and the mainstream party strategies prove to be influential on the electoral strength of the RRP-party.

    These theoretical approaches are then used and combined in a comparative analysis, which imply two important things. First, the legitimacy of the RRP-party itself is an aspect that does explain the rise and growth of RRP-parties. Second, in the case of Sweden, the system-oriented and contextual factors alone were not able to explain the rise and growth of the Sweden Democrats. Together these findings stress that the dynamic perspective between system-oriented and actor-oriented factors truly is meaningful when trying to explain rise and growth of RRP-parties.

  • 21.
    Schmiterlöw, Maria
    Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
    Autonomous Path Following Using Convolutional Networks2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Autonomous vehicles have many application possibilities within many different fields like rescue missions, exploring foreign environments or unmanned vehicles etc. For such system to navigate in a safe manner, high requirements of reliability and security must be fulfilled.

    This master's thesis explores the possibility to use the machine learning algorithm convolutional network on a robotic platform for autonomous path following. The only input to predict the steering signal is a monochromatic image taken by a camera mounted on the robotic car pointing in the steering direction. The convolutional network will learn from demonstrations in a supervised manner.

    In this thesis three different preprocessing options are evaluated. The evaluation is based on the quadratic error and the number of correctly predicted classes. The results show that the convolutional network has no problem of learning a correct behaviour and scores good result when evaluated on similar data that it has been trained on. The results also show that the preprocessing options are not enough to ensure that the system is environment dependent.

  • 22.
    Holm, Anna
    Linköping University, Department of Computer and Information Science. Linköping University, Faculty of Arts and Sciences.
    Ger interaktion genom rörelse högre engagemang?: En studie av två olika zoom-tekniker inom mobil AR2012Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [sv]

    I den här uppsatsen presenteras en studie av rörelsebaserad zoom (Device Movement Based Zoom) och nyp-zoomning (Pinch-zoom). Rörelsebaserad zoom innebär att användaren zoomar in genom att gå närmare ett objekt och zoomar ut genom att gå längre bort från det. Nyp-zoomning innebär att användaren zoomar genom nyp-gester med två fingrar på plattformens pekskärm. Syftet var att undersöka vilka likheter och skillnader som finns mellan de båda systemen ur ett användarperspektiv samt om engagemanget blir större när rörelserna blir större och användaren tvingas vara mer aktiv (med kroppen) vid interaktionen med systemet. De 24 deltagarna i studien testade två olika system, ett med vardera typen av zoom, och både kvalitativ och kvantitativ data samlades in genom enkäter.

    Resultatet visade att systemen hade nästan lika hög popularitet (på frågan; vilken av de två systemen skulle du föredra?). Däremot var svaren på frågan influerade av vilken telefon de hade till vardags. De som var vana att använda en telefon med knappar för navigering föredrog rörelsebaserad zoom i större utsträckning och de som var vana att använda pekskärm föredrog nyp-zoom i större utsträckning. Samma tendens syntes genomgående i all insamlad data. En tendens till att systemet med rörelsebaserad zoom gav högre engagemang hos användarna gick att se, men inga signifikanta skillnader fanns för hela gruppen. Tendensen var störst för delkategorierna upplevt engagemang och stabilitet. När deltagarna delades upp efter vilken mobiltelefon de var vana att använda syntes tendensen att de båda systemen ansågs mer likvärdiga i självskattat engagemang för de som sen tidigare var vana att använda nyp-zoom. De som inte var vana att använda nyp-zoom (deltagarna som använde knapptelefoner till vardags) märkte en större skillnad på systemen. Signifikanta skillnader sågs här under det totala engagemanget samt för delkategorierna stabilitet och upplevt engagemang. Värt att notera är att gruppstorleken var väldigt ojämn och antalet deltagare som var vana att använda en knapptelefon var väldigt lågt.

    Rörelsebaserad zoom upplevdes som naturlig och mer fri, medan nyp-zoom är smidigt att använda i vissa situationer då det inte kräver någon plats att gå omkring. En annan fördelmed nyp-zoom är att 3d-modellerna inte försvinner som de kan göra med den rörelsebaserade zoomen eftersom hela markören behöver vara i bild i enhetens kamera för att 3d-modellen ska visas. Däremot verkar nyp-zoom vara relativt svårt att använda för de som inte är vana vilket också syntes i de kvalitativa data. För att kunna säga mer hur väl resultatet kan generaliseras, till exempel med fokus på kroppslig interaktion och om något av sätten att zooma är att föredra över lag uppmuntras fler liknande studier.

  • 23.
    Lehtojärvi, Jonas
    Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.
    En lågeffektsmodul för markfuktsmätning med fokus på ZigBee2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna rapport presenterar ett examensarbete som gått ut på att bygga en prototyp av ett trådlöst sensornätverk vars funktion är att mäta fuktighet och lagra värdena på ett minneskort. Detta utförs för att man förhoppningsvis kan bli varnad för en eventuellt inkommande torka. Prototypen som utvecklats består av en huvudenhet och en sensorenhet. Det är möjligt att koppla upp flera sensorenheter till detta system och slutligen kommer det vara flertalet sensorenheter uppkopplade mot varje huvudenhet. Kommunikationssättet som används för kontakt med omvärlden är Bluetooth och det förutsätter att en person har möjligheten att åka till alla stationer och samla upp den data som lagrats. För utvecklandet av prototypen har ett kopplingsdäck och ett STK-500 använts vilket har begränsat val av mikrokontroller till en mikrokontroller från Atmel. Den mikrokontroller som används är en ATMega328. Kommunikationen mellan enheterna sker via ZigBee. Detta trådlösa sensornätverk gör en mätning av markfukt en gång om dagen och lagrar mätvärden på ett minneskort. När man via det grafiska gränssnittet på  datorn väljer att ladda ner mätvärdena skrivs de in i en fil på datorn och raderas från det minneskort som sitter i huvudenheten. Prototypen kommer utvecklas och om slutliga resultatet visar sig fungera som förväntat även installeras i flodområdet Limpopo i nordliga Sydafrika som projektet inriktar sig mot.

  • 24.
    Ståhl, Sally
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Strokekedjan från början till slut: En etnografisk studie om farlighet och tid i en akut vårdkedja2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    30 000 people in Sweden get a stroke every year. This leads to large personal adaptions as well as high costs for the society. The most efficient treatment, thrombolysis, must be given as soon as possible to have a good effect. At the same time it is very important to find out if the patient has any differential diagnosis that can make the treatment hazardous.

    This study investigates how the course ov events around acute stroke patients take place and important factors for the decision making. The studiy is based on ethnographic field studys on four swedish hospitals. The material is analysed with methods from joint cognitive systems and goal-oriented design. The results show that in spite of different organisation of the course  of events around acute stroke patients are the processes and direct communication most successful for effective spread of information between the processes. The neurologist on call is an important roll who, as well as the rest of the participants in the course of events, balances the decision making between efficiency and thoroughness. The combination of analysis gives results on both system- and individual levels. Possibilites for improvents are given in three categories: logistic, technological and organizational.

  • 25.
    Sahlberg, Jörgen
    Swedish Meteorological and Hydrological Institute.
    Physical modelling of the Akkajaure reservoir2003In: Hydrology and Earth System Sciences, ISSN 1027-5606, E-ISSN 1607-7938, Vol. 7, no 3, 268-282 p.Article in journal (Refereed)
    Abstract [en]

    This paper describes the seasonal temperature development in the Akkajaure reservoir, one of the largest Swedish reservoirs. It lies in the headwaters of the river Luleiilven in northern Sweden; it is 60 km long and 5 km wide with a maximum depth of 92 m. The maximum allowed variation in surface water level is 30 m. The temperature field in the reservoir is important for many biochemical processes. A one-dimensional lake model of the Akkajaure reservoir is developed from a lake model by Sahlberg (1983 and 1988). The dynamic eddy viscosity is calculated by a two equation turbulence model, a k-ε model and the hypolimnic eddy diffusivity formulation which is a function of the stability frequency (Hond o et al., 1993). A comparison between calculated and measured temperature profiles showed a maximum discrepancy of 0.5-1.0oC over the period 1999-2002. Except for a few days in summer, the water temperature is vertically homogeneous. Over that period of years, a weak stratification of temperature occurred on only one to two weeks a year on different dates in July and August. This will have biological consequences.

  • 26.
    Dyring Tingvall, Sofia
    Linköping University, Department of Management and Engineering, Commercial and Business Law.
    Förhållandet mellan konkurrens- och upphandlingsrätt: – en analys av deras samverkan och möjlighet till parallella tillämpning2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Uppsatsen behandlar konkurrens- och upphandlingsrätten. Den syftar till att klargöra när det kan uppstå parallell tillämpning av områdena samt att analysera hur de samverkar. Avseende konkurrenslagstiftningen behandlas den s.k. konkurrensbegränsningsregeln, som stadgar att konkurrensbegränsande samarbeten mellan företag är förbjudna.

    Särskilt behandlas företagsbegreppet och dess avgränsning mot upphandlande myndigheter.

    Avseende företagsbegreppet kan konstateras att det har givits ett vidsträckt tillämpningsområde genom målet Höfner. I målet fastställde EU-domstolen att företagets juridiska form och finansiering saknar betydelse. Genom målet

    FENIN har denna tolkning blivit mer snäv. Av målet FENIN följer exempelvis att kommunala företag vid offentliga upphandlingar kan falla utanför företagsbegreppet när de köper in för intern användning. Det framkommer av målet EasyPay att företag som har en koppling till ett allmännyttigt system behöver kunna särskilja sin verksamhet från systemet för att kunna räknas som företag och omfattas av konkurrensreglerna.

    Målen påvisar att offentliga organ kan undkomma konkurrenslagstiftningen. De visar även att lagstiftningen för att förbjuda konkurrensbegränsande åtgärder inte är tillräckliga. Upphandlande myndigheter kan därför agera konkurrensbegränsande, trots att KL söker förbjuda konkurrensbegränsningar. Det föreligger en skillnad i tillämpning av exempelvis konkurrensbegränsningsregeln, beroende på om det är en privat eller offentlig aktör som agerar. Från en konkurrensrättslig synvinkel är resultatet inte önskvärt, eftersom konkurrensbegränsningar inte är beroende av den som handlar.

    I uppsatsens kapitel om upphandling sätts fokus på de grundläggande upphandlingsrättsliga principerna: likabehandlingsprincipen, icke-diskrimineringsprincipen, transparensprincipen, principen om ömsesidigt erkännande samt proportionalitetsprincipen. Särskild uppmärksamhet lämnas till det nya upphandlingsdirektivet och dess art. 18 som stadgar konkurrensprincipen. Det kan tänkas att konkurrensprincipen kan komma att fungera som påtryckningsmedel för att upphandlande myndigheter ska ta större hänsyn till konkurrensen.

  • 27.
    Jonsson, Markus
    et al.
    Linköping University, Department for Studies of Social Change and Culture. Linköping University, Faculty of Arts and Sciences.
    Wincent, Elin
    Linköping University, Department for Studies of Social Change and Culture. Linköping University, Faculty of Arts and Sciences.
    Länsstyrelsen och reduktionen : Den östgötska länsstyrelsens delaktighet i Karl XI:s reduktion under slutet av 1680-talet / Ogifta mödrar och oäkta barn : En kvantitativ studie om utomäktenskapligt moderskap och oäkta barn i Östergötland och Småland under 1800-talet2013Book (Other academic)
    Abstract [sv]

    Länsstyrelsen och reduktionen : Den östgötska länsstyrelsens delaktighet i Karl XI:s reduktion under slutetav 1680-talet Av Markus Johansson

    På 1600-talet, under en period av grovt sett 100 år, innehade Sverige en maktställning i sitt närområde som inte motsvarades av något liknande förut, och som efter freden i Nystad 1721 heller aldrig kom att återskapas. Frågan som historiker har ställt – och fortfarande ställer – är hur? Hur kunde vårt vidsträckta land med sitt karga klimat och med sin lilla befolkning under en så förhållandevis lång tidsperiod behärska så stor del av sitt närområde?

    Svaret har sökts på många områden. En förklaring som fått stort genomslag är att Sverige tidigt haft en väl utvecklade förvaltning och att den skulle ha inneburit ett avgörande övertag gentemot landets fiender. Det var genom att ligga i framkant av den administrativa utvecklingen som Sverige kunde uppbåda de samlade krafter som behövdes för att upprätthålla stormaktsväldet över en längre tid.

    I och med 1634 års regeringsform lades grunden till den moderna förvaltningen i Sverige. Många av dess skapelser finns fortfarande kvar, måhända i omgjord form. Länsstyrelsen är en sådan. Länsstyrelsen eller landshövdingedömet, som det kallades fram till 1800-talet,2 ersatte det ståthållarskap som införts under Gustav Vasas tid. Redan Gustav Vasas söner hade försökt att förändra och förbättra den regionala maktens organisering. Först med regeringsformen 1634 och landshövdingeinstruktionen året därpå kom ett varaktigt system att implementeras.

    Förutom de många krigen var ett annat kännetecken för 1600-talet att mer och mer makt samlas hos en person, en absolut envåldshärskare, som närmast blev synonym med statsmakten. Sverige är inget undantag från denna utveckling som i övrigt har Danmark och Frankrike som likartade exempel och England som ett bra motexempel. Den reduktion som utfärdades, och till stor del genomfördes under Karl XI:s regentskap, har fått stå som symbolen över hur ägande och makt samlades till staten och den ensamma härskaren.

    I den här uppsatsen intresserar jag mig för dessa två företeelser. Länsstyrelsens funktion i Karl XI:s reduktion är vad den här uppsatsen kommer att behandla. Tiden är mitten och slutet av 1680-talet, alltså ett par år in på reduktionen. Platsen är Östergötlands län. Genom att undersöka vilka order och instruktioner som gavs åt länsstyrelsen i Linköping från centralt håll vill jag ta reda på hur Östergötlands länsstyrelse var delaktiga i Karl XI:s reduktion.

  • 28.
    Carlander, Jakob
    Linköping University, Department of Management and Engineering, Energy Systems.
    Att bygga bostäder enligt miljöbyggnadskrav: En fallstudie i området Nya Wahlbecks2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Energy and resource efficiency is an important part in moving towards a sustainable society. In the year 2013, the total energy use in Sweden was 563 TWh and approximately 26 % of the energy was used in the residential and service sector. Within the residential and service sector, nearly 60 % of the used energy is for heating (Energimyndigheten, 2015). The construction of energy efficient buildings is a central part in creating a sustainable society and Nya Wahlbecks is supposed to become a city district which will show that it is possible to increase growth, quality of life and well-being and at the same time decrease the use of non recyclable and non reusable resources.The primary purpose of this master thesis has been to generate suggestions on how to design the residential buildings in the new city district Nya Wahlbecks, which will be built in east Valla in Linköping, so they can be certified in accordance to the environmental certification system Miljöbyggnad. Besides the primary purpose an investigation on how much electricity that can be generated with photovoltaic and how much energy that can be saved by the use of solar heating panels, has also been conducted. Finally a comparison in emissions of CO2-eqvivalents between a building that just meets the criteria´s of Boverkets Byggregler (BBR) and the generated building models was done.The results which the case study has generated, clearly shows that it is possible to build the new residential buildings in Nya Wahlbecks so that they will meet the different criteria’s for grade Silver and Guld from Miljöbyggnad. The requirements from Miljöbyggnad aim to have as low energy use as possible at the same time as a good indoor climate is kept. These two factors can be contradictions to one another, as for instance low energy use can be reached by having thicker insulation, but thicker insulation often results in higher indoor temperature which can then lead to deterioration in indoor climate. The investigations of energy use and indoor climate were conducted through simulations in the building-simulation program IDA-ICE, where several optimizations were done for different parameters to finally meet the requirements from Miljöbyggnad. Simulations with solar panels for heating and generation of electricity were also conducted with IDA-ICE. The results of the study shows that nearly 60 % of the used electricity in the project building can be generated from photovoltaic panels placed on the roof of the building. About 9 % of the buildings heating energy can be produced with solar panels placed in the same way as the photovoltaic ones. When it comes to emissions of CO2-eqvivalents there would be a difference in approximately 19 tons, which is equivalent to about 30 %, if the building meets the requirements of Miljöbyggnad Silver instead of just meeting BBR´s requirements.

  • 29.
    Bengtsson, Fredrik
    Linköping University, Department of Management and Engineering, Commercial and Business Law.
    Privatkopieringsersättning: Ett analogt rättssystem tillämpat i en digital värld2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Upphovsrätten är ett viktigt rättsområde för att främja nyskapande och för att skapa möjligheter för upphovsmännen att erhålla ett ekonomiskt utbyte för sin kreativa insats. En av de praktiskt viktigaste inskränkningarna i upphovsrätten är rätten för var och en att framställa ett eller några få exemplar av offentliggjorda verk för privat bruk, d.v.s. att privatkopiera. Under 1990-talet ansågs det angeläget att på något sätt kompensera upphovsmännen för deras inkomstförlust som uppstod på grund av de nya möjligheterna att snabbt och billigt kopiera olika alster. Reglerna om privatkopieringsersättning infördes därför i 26 k § URL. Regleringen medför en skyldighet för näringsidkare, som tillverkar eller importerar anordningar som är särskilt ägnade för privatkopiering, att betala ersättning till rättighetshavare vars verk därefter har sänts ut i radio eller TV eller givits ut på anordningar genom vilka de kan återges.

    Problemet med den nuvarande lagstiftningen är att den infördes för femton år sedan när anordningarna i huvudsak hade endast en funktion som dominerade användandet. Numera är många anordningar multifunktionella. Möjligheten att lagra privatkopierade verk är endast en funktion av flera. Det har medfört att avgränsningen av vilka anordningar som ska anses särskilt ägnade för privatkopiering är oerhört svår och lagstiftningen är numera ineffektiv och bidrar till ökade kostnader för parterna istället för den kostnadseffektiva lösningen som avsågs. Ett annat system för att kompensera rättighetshavarna p.g.a. privatkopiering är att finansiera ersättningen via statsbudgeten, vilket tillämpas i bl.a. Norge och Finland. Fördelen med ett sådant system är att det är teknikneutralt vilket innebär att det inte behöver avgöras vilka anordningar som faktiskt utnyttjas för privatkopiering, en gränsdragning som skapar stora problem i Sverige.

    Även om vi inte är där än behöver det inte dröja länge förrän i princip all konsumtion av upphovsrättsliga verk sker på digital väg där rättighetshavaren inte drabbas av någon skada, antingen p.g.a. att denne erhåller ersättning genom en licensavgift eller p.g.a. att ingen privatkopiering överhuvudtaget sker. Fram till dess är frågan vilket kompensationssystem som kan säkerställa att rättighetshavarna erhåller tillräcklig ersättning för den privatkopiering som sker oavsett anordning samtidigt som systemet inte medför en orimlig belastning på konsumenterna. Ett statsbudgetfinansierat system är svaret på den frågan och därför bör ett sådant system införas i Sverige.

  • 30.
    Andersson, Matilda
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Användarbehov och kontextuella krav för val av mobil interaktionsteknik: Behovs- och användarundersökning i Scanias verkstäder2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Mobil informationsteknik har på senaste tiden fått mer uppmärksamhet inom industriella applikationer, inte minst inom underhåll och reparation där teknisk dokumentation förekommer i stor utsträckning. Scania har tagit fram ett nytt koncept för interaktion med teknisk dokumentation i verkstaden där en viktig del av konceptet är mobilitet. Scanias förhoppningar är att en ökad möjlighet till mobilitet ska kunna förbättra användarupplevelsen.

    I detta arbete har en observationsstudie genomförts för att identifiera användarnas behov av mobilitet vid reparation och underhållsarbete samt de kontextuella faktorer som påverkar val av mobil interaktionsteknik.

    Fyra olika behov av mobilitet kunde identifieras efter analysen och till dessa kunde olika krav knytas för att skapa ett underlag för bedömning av olika teknikers potential att uppfylla de aktuella behoven.

  • 31.
    Ravanbakhsh, Samyar
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Elastic travel demand analysis - An application to the West link railway in Gothenburg2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Today the regional railway system lacks the capacity at the central station in order to meet the demand for both the public and freight transportation. The West link is a railway infrastructure project that is expected to both increase train commuting and also increase the train capacity at the central station in Gothenburg. The purpose of this thesis work is to do an elastic demand analysis between car traffic and the West Link in modal shift to determine how many travelers will change mode. Also traffic simulations will be made to investigate the traffic conditions around the stations when the West link has been implemeted. The simulation results showed that nowadays there are congestions on the major highways and some of the smaller low capacity roads. In the future, congestions will become more significant if no countermeasures are implemented like the West link. In the elastic demand analysis the results were overall around 47% – 51% on a demand of between 350 000 – 400 000 trips. As a conclusion it cannot be said whether the West link will ease the pressure on car traffic or not. The reasons are that the population will increase about 100 000 inhabitants until 2030 and the West link is assumed by the region to have this amount of travelers each day. This would result in the same traffic pressure as today with congestions in certain parts. If the number of West link users will be around 200 000, as the results of this thesis shows, then the West link will ease the pressure on car traffic.

  • 32.
    Oskarsson, Emelie
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Post-Deployment Usability Opportunities: Gaining User Insight From UX-Related Support Cases2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    UX-related issues is one type of issue that customer support is facing. This thesis project investigates the possibility to look at support cases as a source of insight to how users interact with an information system application at an ERP company. It is also investigated if it is possible to use this gathered information when further developing the product. Support case data are gone through in order to map what type of problems the users are encountering and a category structure is developed based on this information. The categorization framework is evaluated by letting employees test the structure by categorizing incidents in to different categories. Further data collection are gathered by a questionnaire and follow-up interviews with the classification participants. To evaluate the value in the support case information, employees with product responsibility are also interviewed to get insight from their perspective.

    The result from the evaluation of the category structure indicated that it wasn’t easy to make a categorization of incidents. The incidents were placed in different categories and in order to apply a category structure it would need further evaluation before applying in large scale.

    The information in support cases are concluded to be valuable. The collection of information related to where users are encountering problem and also how many are experiencing the same issue could serve as a basis when prioritizing the product backlog. A mapping of issues could justify resources spent on usability by showing business value based on the presumed impact. 

  • 33.
    Ingemarson, Anton
    Linköping University, Department of Electrical Engineering.
    Sammanfattning av lämpliga topologier för en generisk ultraljudspulsgenerator för ickeförstörande provning2016Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    This bachelor thesis, is a trial in answering what would be a generic pulse generator for ultrasonic testing in the classic test range of 0.5 to 15 MHz. It also goes through multiple variables that affects a test signal and why it really isn't possible to precalculate what a generical pulse generators should achive, in the theory chapter. This thesis also goes through what different types of pulse generators there is and what some of the more high performance pulse generators proposed in scientific articles have achieved and what techniques that have been used and why some techniques are not suitable. In the end of this thesis there is a trial with some assumptions about what a generical pulse generator should achieve, to come to a conclusion about which pulse generator from the proposed ones would be the best generical pulse generator to go with.

  • 34.
    Häger, Gustav
    Linköping University, Department of Electrical Engineering, Computer Vision.
    Improving Discriminative Correlation Filters for Visual Tracking2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Generic visual tracking is one of the classical problems in computer vision. In this problem, no prior knowledge of the target is available aside from a bounding box in the initial frame of the sequence. The generic visual tracking is a difficult task due to a number of factors such as momentary occlusions, target rotations, changes in target illumination and variations in the target size. In recent years, discriminative correlation filter (DCF) based trackers have shown promising results for visual tracking. These DCF based methods use the Fourier transform to efficiently calculate detection and model updates, allowing significantly higher frame rates than competing methods. However, existing DCF based methods only estimate translation of the object while ignoring changes in size.This thesis investigates the problem of accurately estimating the scale variations within a DCF based framework. A novel scale estimation method is proposed by explicitly constructing translation and scale filters. The proposed scale estimation technique is robust and significantly improve the tracking performance, while operating at real-time. In addition, a comprehensive evaluation of feature representations in a DCF framework is performed. Experiments are performed on the benchmark OTB-2015 dataset, as well as the VOT 2014 dataset. The proposed methods are shown to significantly improve the performance of existing DCF based trackers.

  • 35.
    Schenström, Karl
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Physics.
    Biofunctionalization of a Fiber Optics-Based LSPR Sensor2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    When exposed to light, metal nanoparticles exhibit a phenomenon known as LSPR, Localized Surface Plasmon Resonance. The wavelengths at which LSPR occurs is very dependent on the refractive index of the surrounding medium. Binding of biomolecules to the surface of gold nanoparticles result in a change in the refractive index that can be detected spectrophotometrically by monitoring the LSPR peak shift. When functionalized with the corresponding ligand(s), gold nanoparticles can be utilized in biosensors to detect the presence and concentration of a predetermined analyte. However, the system must exhibit high specificity and give rise to a detectable shift for analytes in the desired concentration range to be of commercial interest. The aim of the diploma project was to investigate and optimize the biofunctionalization and performance of a fiber optics based LSPR biosensor.  Three ligand systems were investigated for detection of antibodies (IgG), insulin and avidin. Binding of the analyte to the ligand caused a shift of a few nanometers when using spherical gold nanoparticles. The shifts were significantly larger when using gold nanorods. When using the IgG and insulin ligands, only minor unspecific binding was observed. The setup thus shows great potential for use in a wide range of sensing applications.

  • 36.
    Jansson, Nils-Henrik
    et al.
    Linköping University, Department of Management and Engineering, Economics.
    Winberg, Madelene
    Linköping University, Department of Management and Engineering, Economics.
    Aktiv eller inte aktiv i PPM – Får du betalt för din risk? En teoriprövande analys genom Markowitz moderna portföljteori2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The Swedish premium pension reform at the turn of the century resulted in a greater responsibility for the individual saver. The decision concerning how the premium pension should be invested now lies with the investor. The purpose of this thesis is to analyze whether it had been profitable for a saver to achieve a higher risk-adjusted return for its premium pension money contributions by making an active choice by a self-composed portfolio, rather than to allow the State to invest the capital in the Seventh AP Fund (AP7 Såfa) which is the default option.

    The analysis is based on Harry Markowitz’s established Modern Portfolio Theory by which he drew attention to how investors through diversification can reduce risk in its investment by choosing assets that are not fully correlated. By using the available data of the funds that were selectable in the Swedish Premium Pension system by the time period 2000 – 2014, we have calculated the optimized portfolios with the same risk level as the default option. Subsequently, a comparison of these optimized portfolios and the default option are made in terms of risk and return. Furthermore, three theoretical portfolios are put together over a period of ten years and are invested as these optimized portfolios and reallocated after Markowitz's recommendation to review their savings once a year.

    The analysis shows that it has been possible to achieve higher risk-adjusted returns by making an active choice of portfolio. The problem though is that it is difficult to identify these portfolios in advance. The three theoretical portfolios have all generated a lower return than the default option did during the same period.

    The result shows that the default option is not fully risk-adjusted. Nonetheless, we conclude that the default fund is a good alternative.

  • 37.
    Borgström, Fredrik
    et al.
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics.
    Coyet, Jonas
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics.
    Waste heat recovery system with new thermoelectric materials2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Increasing fuel prices, higher demands on "greener" transports and tougher international emission regulations puts requirements on companies in the automotive industry in improving their vehicle fuel efficiency. On a typical heavy duty Scania truck around 30% of the total fuel energy is wasted through the exhaust system in terms of heat dissipated to the environment. Hence, several investigations and experiments are conducted trying to find ways to utilize this wasted heat in what is called a waste heat recovery (WHR) system. At Scania several techniques within the field of WHR are explored to find the profits that could be made.

    This report will cover a WHR-system based on thermoelectricity, where several new thermoelectric (TE) materials will be investigated to explore their performance. A reference material which is built into modules will be mounted in the exhaust gas stream on a truck to allow for measurements in a dyno cell. To analyze new materials a Simulink model of the WHR-system is established and validated using the dyno cell measurements. By adjusting the model to other thermoelectric material properties and data, the performance of new TE materials can be investigated and compared with today’s reference material.

    From the results of the simulations it was found that most of the investigated TE materials do not show any increased performance compared to the reference material in operating points of daily truck driving. This is due to dominance of relatively low exhaust gas temperatures in average, while most advantages in new high performing TE-materials are seen in higher temperature regions. Still, there are candidates that will be of high interest in the future if nanotechnology manufacturing process is enhanced. By using nanostructures, a quantum well based BiTe material would be capable of recovering 5-6 times more net heat power compared to the reference BiTe material. Another material group that could be of interest are TAGS which in terms of daily driving will increase the power output with pending values between 40-80 %. It is clear that for a diesel truck application, materials with high ZT-values in the lower temperature region (100-350°C) must be developed, and with focus put on exhibiting low thermal conductivity for a wide temperature span.

  • 38.
    Ehliar, Lars-Johan
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Wagner, Tobias
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Key performance indicators for the evaluation of an air navigation service providers' safety management system2016Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Safety is the main concern of the aviation industry. All Air Navigation Service Providers must have a Safety Management System (SMS) which states how safety is handled, promoted and prioritized. By developing Key Performance indicators (KPIs), it is possible to quantify the effectiveness of a SMS, discover potential flaws and improvement measures. This thesis identifies principles behind the SMS, the development of KPIs and suggest potential KPIs for the Swedish air navigation service provider LFVs’ SMS.

    A literature study was performed and organisation specific documents were analysed to develop potential KPIs within the areas timely compliance with international obligations, competency and adoption and sharing of best practices based on an EASA questionnaire. This work presents a set of 27 performance indicators and recommends 6 as potential KPIs for the three areas together. The KPIs are developed specifically for LFV but could be applicable for other organisations with similar SMS structure and processes. They should be analysed within the organisation and, potentially, have thresholds set before implementation.

  • 39.
    Hanson, Maryam
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems.
    Study on Smart Dust Networks2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis work is done for the department of Electronic System at The Institute of Technology at Linköping University (Linköpings Tekniska Högskolan). Study's focus is to design and implement a protocol for smart dust networks to improve the energy consumption algorithm for this kind of network.

    Smart dust networks are in category of distributed sensor networks and power consumption is one of the key concerns for this type of network. This work shows that by focusing on improving the algorithmic behavior of power consumption in every network element (so called as mote), we can save a considerable amount of power for the whole network.

    Suggested algorithm is examined using Erlang for one mote object and the whole idea has put into test for a small network using SystemC.

  • 40.
    Bajracharya, Sudeep
    Linköping University, Department of Computer and Information Science.
    Enhanced OpenModelica Python Interface2016Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    OMPython is a Python library for OpenModelica, which provides a Python interface to OpenModelica. This thesis significantly improves OMPython by an enhanced, more powerful and easier to use API. It presents how a user can use the Python interface to simulate and access Modelica models using Python objects. The enhanced OMPython includes the list of functions that have been implemented such as getXXXNames(), getXXXValues(), setXXXValues(), getXXXOptions(), setXXXOptions(), and simulate(), etc. that allow users to interact with Modelica model properties(i.e., model variables) and the output of the OpenModelica compiler and simulator. A few Modelica models are used for demonstrations in order to make it easy for readers to understand. By the way, this thesis does not describe modeling Modelica models or compilation of such models.

  • 41.
    Johansson, Marcus
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Generating SkePU Code from Automatically Detected Algorithmic Patterns in C Source Programs2016Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    Modern heterogeneous multi-core architectures containing one or multiple GPU de- vices require expert knowledge in order to be fully utilized through parallelization by the programmer. Software written for one hardware setup might not easily be portable to work as efficiently on a differing architecture. Automatic parallelization of sequential C code to make efficient use of such architecture in an extensible man- ner would facilitate the porting of legacy code and provide a non-expert programmer with a tool granting access to modern hardware architectures.

    We present an early prototype of such an extensible tool-chain and attempt to apply it on domain-specific C source code. It is based on a generic tool for hierarchical pattern matching in C source codes, where the user can define own patterns and recognition rules, and a code generation back-end. We show how it, combined with existing libraries, can be used to automatically port sequential legacy code to different multicore architectures, such as multicore CPUs and GPUs. Our tool is an attempt to do this and yields valid parallelized code, but fails to reach speedup for most implemented patterns. The tool is applied on one test case, a legacy ODE implementation in C, with similar results. A reason for slowdown is discussed in the concluding section.

  • 42.
    Holm, Rasmus
    Linköping University, Department of Computer and Information Science, Software and Systems.
    Energy-Efficient Mobile Communication with Cached Signal Maps2016Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    Data communication over cellular networks is expensive for the mobile device in terms of energy, especially when the received signal strength (RSS) is low. The mobile device needs to amplify its transmission power to compensate for noise leading to an increased energy consumption. This thesis focuses on developing a RSS map for the third generation cellular technology (3G) which can be stored locally at the mobile device, and can be used for avoiding expensive communication in low RSS areas.

    The proposed signal map is created by crowdsourced information collected from several mobile devices. An application is used to collect data in the mobile device of the user and the application periodically sends the information back to the server which computes the total signal map.

    The signal map is composed of three levels of information: RSS information, data rate tests and estimated energy levels. The energy level categorizes the energy consumption of an area into "High", "Medium" or "Low" based on the RSS, data rate test information and an energy model developed from physical power measurements. The coarse categorization provides an estimation of the energy consumption at each location. It is evaluated by collecting data traces on a smartphone at different locations and comparing the measured energy consumption at each location to the energy level categories of the map.

    The RSS prediction is preliminarily evaluated by collecting new data along a path and comparing how well it correlates to the signal map. The evaluation in this thesis shows that with the current collected data there are not enough observations in the map to properly estimate the RSS. However, we believe that with more observations a more accurate evaluation could be done.

  • 43.
    Jarting, Mikael
    et al.
    Linköping University, Department of Management and Engineering, Industrial Economics.
    Persson, Daniel
    Linköping University, Department of Management and Engineering, Industrial Economics.
    Organizational Effects of Using SaaS Systems in SMEs2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    "The cloud" has been a hot subject the last couple of years, and has been considered especially attractive to SMEs due to making it possible for whole information systems to be fully managed by the vendor. This can unburden the customer organization regarding for example large investment costs, hardware and software maintenance, while also adding flexibility and scalability.

    There are three types of service models: infrastructure, platform and software, which dictate what the customer and vendor manages. In Software-as-a-Service (SaaS), which is the focus of this study, a third part manages both the applications and hardware and the users access these resources through the Internet. However, with the usage of SaaS comes several issues for companies to handle and make use of, for example security and mobility.

    This master thesis' aim is to present organizational effects of SaaS usage in SME user companies, by studying customer organizations post implementation. A qualitative comparative study was conducted where we held semi-structured interviews with SME users mainly at their own offices. In total six interviews were conducted at five different companies. At least two years usage experience was a criteria we set to ensure we could retrieve enough data from the companies.

    To fulfill the aim of the study we set out to find common issues affecting SMEs using SaaS systems. Through a pre-study, including literature studies and customer interviews, we determined which of the common issues that could be considered most relevant. Factors taken into consideration was how SaaS specific an issue was and how relevant it is in the post implementation phase, and how much data we were able to retrieve regarding an issue through the interviews. The relevant issues were: price model, vendor relation, frequent updates, mobility and integration. Further, five hypotheses were derived, one for each relevant issue regarding the organizational effects of SaaS usage.

    An analytical model was constructed mainly based on DeLone and McLean's (1992; 2003) original and updated Information System Success Model. The model helped in deriving organizational effects of usage from the different relevant issues. By using the analytical model with interview and literature study material we came up with the findings of this report, as described below.

    The possible price models enables companies to be more flexible with their IT portfolio. Also, it was concluded that the costs of SaaS are based upon usage, which could make it harder to estimate, especially if the usage varies. But it can also be a strength enabling customers to scale their usage as needed.

    In general, the vendor relation between a customer and vendor was not too complex, however with one exception. Our main discovery was that certain factors of SaaS usage affect the degree of experienced vendor lock-in differently. These include the nature of the pricing model, contract binding times and data ownership rights. Further, the level of trust and lock-in level could also affect the customer intention to change system.

    Frequent updates, which are managed by the vendor, reduce time and effort in regards to maintenance performed by customers. However, sometimes the updates could also cause problems when the customer had own configurations.

    The mobility offered by SaaS systems extends organizations ability to work. This includes increased geographical freedom for mainly employees of an organization.

    We found that integration is much more of a general issue for information systems. But in SaaS connection of services are possible and can thus enable further value than each service can on its own. However, integration also causes increased lock-in and system management.

  • 44.
    Persson, Dennis
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Procedural Content Generation for a Web-Based Motion Game to Increase the Variation and Progression of the Game2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Computer games have always become more and more advanced. One of the biggest reasons to its rapid evolution is the use of procedural content generation (PCG), which is used to generate game content automatically. However, there is one type of games that is more unexplored when it comes to PCG, namely motion games. Motion games are games where the player interacts with the game by moving his own body rather than using a gamepad, mouse or keyboard. Thanks to that, motion games are a healthier alternative to regular games, and this thesis therefore explores the possibilities to use PCG to develop more exciting motion games. The focus lies on achieving variation and progression since both of those are important concepts closely related to PCG. An exploratory case study is also conducted to examine how the derived guidelines work in a real game. The result concluded is that the guidelines seem to work well, but that all of them are not easily adapted to every game. Different game genres therefore call for different guidelines to be used.

  • 45.
    Söderström Gardevåg, Rebecka
    et al.
    Linköping University, Department of Behavioural Sciences and Learning.
    Malm, Patrik
    Linköping University, Department of Behavioural Sciences and Learning.
    Konstruktioner i barnböcker: en analys av LasseMajas detektivbyrå utifrån genus- och rollteori2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Studien syftar till att granska genus- och rollkonstruktioner i barnböcker utifrån frågeställningarna; hur ser genus- och rollkonstruktioner ut i de studerade böckerna? Böcker är en viktig källa i barns socialisationsprocess (Hulth & Schönbäck, 2011). Studien utgår från konstruktionismen, och använder sig av bild- och textanalys för att studera LasseMajas detektivbyrå. Studien utgår ifrån genusteori och rollteori och har en deduktiv ansats.

    Resultaten visar bland annat att böckerna innehåller en genusnormativ yrkesdelning och att bilderna särskiljer kvinnor och män från varandra. Det finns vissa grundläggande normer i böckerna samt vissa yrken som har olika viktiga funktioner. Böckerna skildrar även hierarkier, att det finns skyldigheter inom givna relationer samt att vissa roller krockar med varandra. Studiens slutsats är böckerna skildrar normativa inslag gällande hur karaktärer porträtteras och tillåts agera. Konstruktionerna förmedlar att det är viktigt att kvinnor och män särskiljs, samt att ordning och stabilitet bevaras i sociala system.

  • 46.
    Öbrink, Emil
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Analysis and streamline the information flow at Baltic Sea Gateway2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    I takt med att informationen blir en allt större del av logistiken måste även den utvecklas och inte bara den fysiska delen. Hos Baltic Sea Gateway har informationslogistiken haft en stor utveckling på sidan som heter Fredriksskans medan Granudden som den andra sidan av vattnet heter har fortsatt som tidigare. I det här arbetet kommer informationsflödet på Granudden att ses över för att se vilka förbättringar som kan utföras på detta flöde som även kommer att stötta det fysiska flödet. Metoderna som använts för insamling av information till nulägesbeskrivningen och kartläggningen är intervjuer och observationer. Delar av informationen har fåtts ut genom tre av företagens interna system. Flödeskartläggningen visade att informationen på terminal Granudden har väldigt många steg samt att det finns två kundserviceavdelningar som båda hanterar information som rör det fysiska arbetet på terminal Granudden. Genom att ha två kundserviceavdelningar som sköter informationen på samma terminal sker en stor del onödig kommunikation och personalen i magasinet vet inte alltid vem de ska kontakta. En anledning till att informationsflödet är komplicerat hos Baltic Sea Gateway är för att det finns två olika kundserviceavdelningar där en endast tar hand om en kund medan den andra tar hand om all annan information inom och ut från företaget. Dessa två avdelningar kommunicerar med varandra och till viss del med samma personal i magasinen. Genom kartläggningen av informationsflödet på terminal Granudden har det visats att det finns en del problem i informationskedjan. Informationskedjan är onödigt komplex och en del arbetsuppgifter saknas samt att vissa uppgifter utförs i onödan. Denna rapport resulterar i ett antal förbättringsförslag där de två viktigaste rekommendationerna är att använda sig av en kundserviceavdelning istället för två samt att magasinsplanering måste ske för alla magasin på terminal Granudden.

  • 47.
    Rönn, Mattias
    Linköping University, Department of Computer and Information Science, Database and information techniques.
    Symvex: A Symbolic Execution System for Machine Code2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis is a part of an ongoing research project at Link ̈oping University.

    The goal of the thesis work is to design and implement a prototype for a symbolic

    execution system that scales well with larger programs and is capable of performing

    symbolic execution on machine code. For this reason we have analyzed the current

    state of symbolic executors that are able to perform symbolic execution on machine

    code to see if we could use that implementation as base for our prototype. We

    wanted to know if any of the existing systems scaled well with large software. We

    found that neither of the existing systems worked well with the real life software in

    our evaluation. Furthermore, even if it would have been possible to fix one of the

    existing systems, the time required to figure out the faults in their implementation

    would most likely have been too great. For this reason we decided to create

    an implementation of our own from scratch. However, we did note that some

    approaches in the existing systems seemed to work better with large software.

    Specifically saving as little state as possible about the program seemed favorable.

    Armed with the knowledge gained from the analysis, we managed to implement

    a system that compared quite well with the existing systems. Our system was

    able to execute all the real-life programs used in our tests, but unfortunately had

    some issues with high memory usage for certain programs. In order to lessen the

    problem with high memory usage, we present and discuss several potential ways

    to mitigate this issue.

  • 48.
    Matras, Omolara
    Linköping University, Department of Management and Engineering. Linköping University, Faculty of Arts and Sciences.
    In pursuit of a perfect system: Balancing usability and security in computer system development2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Our society is dependent on information and the different technologies and artifacts that gives us access to it. However, the technologies we have come to depend on in different aspects of our lives are imperfect and during the past decade, these imperfections have been the target of identity thieves, cyber criminals and malicious persons within and outside the organization. These malicious persons often target networks of organizations such as hospitals, banks and other financial organizations. Access to these networks are often gained by sidestepping security mechanisms of computer-systems connected to the organization’s network.

    Often, the goal of computer-systems security mechanisms is to prevent or detect threats; or recover from an eventual attack. However, despite huge investments in IT-security infrastructure and Information security, over 95% of banks, hospitals and government agencies have at least 10 malicious infections bypass existing security mechanisms and enter their network without being detected. This has resulted in the loss of valuable information and substantial sums of money from banks and other organizations across the globe. From early research in this area, it has been discovered that the reason why security mechanisms fail is because it is often used incorrectly or not used at all.  Specifically, most users find the security mechanisms on their computers too complicated and they would rather not use it. Therefore, previous research have focused on making computer-systems security usable or simplifying security technology so that they are “less complicated” for all types users, instead of designing computers that are both usable and secure. The problem with this traditional approach is that security is treated as an “add-on” to a finished computer-system design.

    This study is an attempt to change the traditional approach by adjusting two phases of a computer-system design model to incorporate the collection of usability as well as security requirements. Guided by the exploratory case study research design, I gained new insights into a situation that has shocked security specialists and organizational actors alike. This study resulted in the creation of a methodology for designing usable and secure computer-systems. Although this method is in its rudimentary stage, it was tested using an online questionnaire. Data from the literature study was sorted using a synthesis matrix; and analyzed using qualitative content analysis. Some prominent design and security models and methodologies discussed in this report include User-Centered System Design (UCSD), Appropriate and Effective Guidance for Information Security (AEGIS) and Octave Allegro. 

  • 49.
    Aevan, Nadjib Danial
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems.
    MDO Framework for Design of Human PoweredPropellers using Multi-Objective Genetic Algorithm2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis showcases the challenges, downsides and advantages to building a MultiDisciplinary Optimization (MDO) framework to automate the generation of an efficientpropeller design built for lightly loaded operation, more specifically for humanpowered aircrafts. Two years ago, a human powered aircraft project was initiatedat Linköping University. With the help of several courses, various students performedconceptional design, calculated and finally manufactured a propeller bymeans of various materials and manufacturing techniques. The performance ofthe current propeller is utilized for benchmarking and comparing results obtainedby the MDO process.The developed MDO framework is constructed as a modeFRONITER project wereseveral Computer Aided Engineering softwares (CAE) such as MATLAB, CATIAand XFOIL are connected to perform multiple consequent optimization subprocesses.The user is presented with several design constraints such as blade quantity,required input power, segment-wise airfoil thickness, desired lift coefficientetc. Also, 6 global search optimization algorithms are investigated to determinethe one which generate most efficient result according to several set standards.The optimization process is thereafter initialized by identifying the most efficientchord distribution with a help of an initial blade cross-section which has been previouslyused in other human powered propellers, the findings are thereafter usedto determine the flow conditions at different propeller stations. Two different aerodynamicoptimized shapes are generated with the help of consecutively performedsubprocesses. The optimized propeller requires 7.5 W less input power to generatenearly equivalent thrust as the original propeller with a total efficiency exceedingthe 90 % mark (90.25 %). Moreover, the MDO framework include an automationprocess to generate a CAD design of the optimized propeller. The generatedCAD file illustrates a individual surface blade decrease of 12.5 % compared tothe original design, the lightweight design and lower input power yield an overallpropulsion system which is less tedious to operate.

  • 50.
    Kantzon, David
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    PFC-design for frequency converter2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis deals with power factor correction for three-phase systems. A boost-buck topology was described, modeled and then simulated in MATLAB/Simulink. The simulation results show that the system provides a power factor over 99% over the tested power output range. Moreover, the harmonic injection concept was introduced which reduces the total harmonic distortion to 8.72% at full output power. A prototype system was also built using an FPGA for the control system. The prototype did not provide the performance seen in simulation but showed that the method is valid and does provide a higher power factor when used.

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