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  • 1.
    Abdul Malek, Nurul Aida
    et al.
    Universiti Tun Hussein Onn Malaysia (UTHM), Malaysia / Department of Production, University of Vaasa, Finland.
    Shahzad, Khuram
    Department of Production, University of Vaasa, Finland.
    Takala, Josu
    Department of Production, University of Vaasa, Finland.
    Bojnec, Stefan
    Faculty of Management, University of Primorska, Slovenia.
    Papler, Drago
    Faculty of Management, University of Primorska, Slovenia.
    Liu, Yang
    Department of Production, University of Vaasa, Finland.
    Analyzing Sustainable Competitive Advantage: Strategically Managing Resource Allocations to Achieve Operational Competitiveness2015In: Management and Production Engineering Review, ISSN 2080-8208, E-ISSN 2082-1344, Vol. 6, no 4, 70-86 p.Article in journal (Refereed)
    Abstract [en]

    In today’s dynamic business environment, a key challenge for all companies is to make adaptive adjustments to their manufacturing strategy. This study demonstrates the competitive priorities of manufacturing strategy in hydro-power case company to evaluate the level of sustainable competitive advantage and also to further analyze how business strategies are aligned with manufacturing strategies. This research is based on new holistic analytical evaluation of manufacturing strategy index, sense and respond, and sustainable competitive advantage models. These models help to describe, evaluate, and optimize resource allocation to meet the performance requirements in dynamic decision making. Furthermore, these models evaluate operational competitiveness for manufacturing strategies according to the multi-criteria priority. The results show that the adjustments of competitive priorities in manufacturing strategies by implementing the proposed holistic analytical models are helpful in strategically managing business operations. The discussion derives the most critical attributes in business operations while alignment of resource allocation with competitive priorities help to strategically focus those attributes. In conclusion, we argue that resource allocation and manufacturing strategies have become the most important capabilities in a business environment where companies focus to get a sustainable competitive advantage.

  • 2.
    Abramsson, Jonatan
    Linköping University, The Department of Physics, Chemistry and Biology.
    First-principle of Sc / Cr multilayers for x-ray mirrors applications2008Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    In order to produce x-ray mirrors the Thin Film Physics group at IFM grows Cr/Sc multilayers, with a typical thickness of the individual layers in the range 5-20 Å, and with as many periods as possible (a few hundred).

    The quality of the multilayer interfaces is crucial for their performance as mirrors. For thick layers poly-crystalline multilayers form with an interface quality that is too poor for the use as x-ray mirrors. For thinner layers, however, amorphous layers are formed with a much better quality of the interface.

    The goal of this project was to understand the formation of amorphous multilayers. Unfortunately it is impossible with the present day's theoretical tools to determine the structure of amorph interfaces. It is also impossible to calculate the interface structure for elements with large mismatch in size.

    So we have to construct interface models that are both simple and based on physical arguments.

  • 3.
    Ahlin, Katarina
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Bredin, Sanna
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    European Aviation Crisis Management2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Our aim is to investigate and evaluate the efficiency of crisis management in European aviation, and to recommend enhancements. To fulfill this, we mapped the current crisis management plans and created a fictive scenario where a cyber-attack shut down the power at five of the major airports in Europe. Air traffic in Europe was reconstructed to a chosen day; the 16th of September 2013, and the reconstructed traffic situation was used in the scenario. We also created a model, for the purpose of showing the effect of a cut in time for the steps in the crisis management plan may have on the traffic waiting to depart at the closed airports. When using these means, we could implement the crisis management plans on the fictive scenario and make changes to the plans for a new implementation. The existing crisis management plans were compared to the modified plans made by us, and it was found that usage of a common platform for the different stakeholders involved in the crisis could improve the efficiency of the crisis management.

  • 4.
    Ahlsén, Olle
    Linköping University, Department of Management and Engineering, Carl Malmsten - furniture studies.
    Att löta en ring, eller ser jag mönster i cirklar?: En undersökning av en underutnyttjad snickeriteknik2016Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [sv]

    Var, när, hur och vad jag kom fram till.

    Utifrån egna erfarenheter från olika uppgifter under min treåriga utbildning och utifrån de ytterligare trevare jag gjort inom ramen för mitt examensarbete, så har jag undersökt lötade ringars tekniska, estetiska och berättande möjligheter.

    Med olika hållbarhetstester är styrkan prövad och med ett antal varierade dekorativa bearbetningar inom lötningstekniken är de estetiska möjligheterna synliggjord.

  • 5. Ahmad, Tausif
    et al.
    Gooran, Sasan
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Hybrid Color Halftoning2010Conference paper (Refereed)
  • 6.
    Ahrenberg, Lars
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Alignment2014In: Routledge Encyclopedia of Translation Technology / [ed] Chan Sin-wai, London and New York: Routledge, 2014, 395-408 p.Chapter in book (Refereed)
  • 7.
    Al Farra, Hussni
    Linköping University, Department of Management and Engineering, Logistics & Quality Management.
    Acceptance Tests – FAT & SAT: An Empirical Case Study of Utility Poles2016Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    The overall purpose of this project is to devise improved quality acceptance procedures to examine quality characteristics of utility poles at the factory of the supplier (FAT) and on-site upon receipt by the customer (SAT). To that end, the thesis draws upon available standards, literature, and industry practices regarding wood, fiberglass and steel poles. As far as the design of the research, a single case study of a major power company was chosen. Then, a data collection plan was developed in order to build upon the existing knowledge found in the literature, and upon the data that can be collected from three of the Company’s suppliers, in addition to the Technical Research Institute of Sweden (SP). Documents’ analysis, interviews, observations, and a survey were the tools of that plan. It was found that criteria, inspection and test methods of wood poles are all sufficiently covered in the standards and the literature; for wood is the most commonly used material for utility poles. Next, in coverage of research, are the steel poles; while there is currently no standard that covers fiberglass utility poles. Indeed, quality characteristics, criteria, and acceptance procedures can altogether form parts of a sustainable solution, as long as the quality is managed as a process whether at the Company’s end or at the fabrication sites; that is especially true if there is some form of backward partnership between the Company and its suppliers.

  • 8.
    Alenvret, Caroline
    et al.
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Science & Engineering.
    Evaldsson, Johannes
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Science & Engineering.
    Creating customer value through knowledge integration: How internal stakeholders can be involved in the product development process2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The increasing globalisation of the market is followed by increased competition between organisations. Therefore it becomes more important to create products with high customer value. To be able to create customer value, deep understanding of the customers’ needs must be obtained by employees, shared between them and transformed into products. Further consequences of globalisation are increasing differences between customers’ needs, which results in demand for customisable and flexible products.The purpose of this study was to analyse how organisations can create more customer value through increased knowledge integration. The focus was on how knowledge that already resides within a globally dispersed organisation can be integrated during the product development process.This study showed that customer value is created throughout the product development process by integrating the knowledge held by R&D and internal stakeholders. Different types of value are created at different phases in the product development process. One important finding is that different parts of the augmented value are created throughout the entire product development process. Since employees obtain different knowledge depending on which customer they interact with, it is important to utilise knowledge from a large number of employees with different roles and in different countries. Hence, the significance of knowledge integration must be disseminated and understood across the organisation. After completing the product development process additional customer value is created by the internal stakeholders’ who sell and implement the product, but it is during the product development process that the basis for their value creation is established.Knowledge needs to be integrated in a formalised, repeatable way, so that the R&D department can ensure that the right product is developed at the right time. Integration means that the tacit knowledge that resides within one employee is codified into an explicit form that can be exploited by more employees. Therefore, four steps must be performed and repeated iteratively to create and spread knowledge throughout the organisation. The first step includes communication by exchanging tacit knowledge. The second step entails documenting the knowledge, and the third step involves combining the knowledge residing in the organisations into one common knowledge system. The final step includes distributing the knowledge so that it recievess wide attention within the organisation. Several factors that have a negative impact on these four steps, and knowledge integration, need to be countered somehow. However, it was found that there are several mechanisms that facilitate knowledge integration, and most often the presence of several mechanisms at the same time had a better effect.

  • 9.
    Alexandersson, Martin
    Linköping University, Department of Management and Engineering, Carl Malmsten - furniture studies. Möbelsnickeri.
    Parkettläggning: med massivträ som utgångspunkt2015Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This thesis is about furniture parquetry and various techniques. Parquetry can be describe as wooden, 2-dimensional patterns used to garnish furniture and other products. It is manufactured in thin veneer layer and applied to the surface. By using thin veneer we are able to minimize stresses in the material, which results in tight joints. In Europe, furniture parquetry is traditionally created by wood veneer pieces that has been formed and joined into a pattern. There are also other proven techniques developed during different stages in history and in different places in the world.

    In my thesis I describe some of those established techniques and some of my experiments in the subject. The report is based on literature studies, observations of movie clips, interviews and empirical practical studies. I have compared different techniques to see in what ways it is possible to rationalize the production of furniture parquetry. At the same time I wanted to try and develop a method that makes it possible to create parquetry patterns containing round shapes. In this way I hope to contribute to the development and modernization in the area. 

  • 10.
    Alghazi, Ziad
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Wireless instrumentation2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Syftet med detta examensarbete var att undersöka om det finns möjlighet att implementera en trådlöst instrumenterings kit från Emerson Rosemount Process AB på dagens styrsystem som finns på Siemens gasturbiner. En prototyp skapades som bygger på Siemens Simatic PCS-7 med en styrenhet och en switch. Där efter implementerades Emerson Wireless gateway och två trådlösa instrument. I examanearbetet skapades även en logik som hanterar kommunikationen mellan simatic och gateway. Modbus RTU och TCP/IP är kommunikationsprotokollet som användes under arbetet. En undersökning om den uppsättningen klarar av de atex (ATmosphères EXplosibles )och sil (saftey integrity level ) krav gjordes, för att säkerställa om det finns möjligheter att implementera detta på dagens tillverkningsprocess. Utöver dessa kontrollerades om det råder för och nackdelar med den trådlösa allternativet inom IT-säkerhet, instrumentdiagnostik och störkänslighet. Arbetet fullgjordes på Siemens Industrial Turbomachinery i Finspång tillsammans med företagets utvecklingsavdelning för styrsystem.

  • 11.
    Ali, Islam
    et al.
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Iqbal, Wasim
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Performance analysis of various antennas at 2.45 GHz2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this era of technology, there is a swift increase in the number of applications which operate at the Industrial Scientific Medical Band. The applications of this band ranges from home microwave oven to wireless local area networks (WLAN). Therefore, the design of antennas on this band is essential.

    This thesis work revolves around the detailed study and design of various antennas at 2.45 GHz. All the simulation of the antennas was performed using advanced design system (ADS). Microstrip antenna technology is commonly used in antenna design due to its advantages such as low-profile, small size and easy fabrication on printed circuit boards.

    Firstly, various antennas such as rectangular patch, square patch, dipole, inverted F and printed Yagi were designed using ADS and their different performance parameters such as input impedance matching, voltage standing wave ratio (VSWR), input reflection, and gain and directivity were discussed. Dipole antenna, inverted F and printed Yagi were fabricated on printed circuit board (PCB) to compare their measured and simulated results.

    At the end, a conclusion is drawn for different antennas based on their various performance parameters.

  • 12.
    Ali, M.
    et al.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Svensk, Olle
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Zhen, Z.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Suihkonen, S.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Törmä, P.T.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Lipsanen, H.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Sopanen, M.
    Helsinki University of Technology (TKK), Micronova, Department of Micro and Nanosciences, P.O. Box 3500, FIN-02015 TKK, Finland.
    Hjort, Klas
    Department of Engineering Sciences, Uppsala University, P.O. Box 534, SE-75121 Uppsala, Sweden.
    Jensen, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
    Reduced photoluminescence from InGaN/GaN multiple quantum well structures following 40 MeV iodine ion irradiation2009In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, ISSN 0921-4526, Vol. 404, no 23-24, 4925-4928 p.Article in journal (Refereed)
    Abstract [en]

    The effects following ion irradiation of GaN-based devices are still limited. Here we present data on the photoluminescence (PL) emitted from InGaN/GaN multiple quantum well (MQW) structures, which have been exposed to 40 MeV I ion irradiation. The PL is reduced as a function of applied ion fluence, with essentially no PL signal left above 1011 ions/cm2. It is observed that even the ion fluences in the 109 ions/cm2 range have a pronounced effect on the photoluminescence properties of the MQW structures. This may have consequences concerning application of InGaN/GaN MQW’s in radiation-rich environments, in addition to defect build-up during ion beam analysis.

  • 13.
    Allard, Olof
    Linköping University, Department of Computer and Information Science. Linköping University, Faculty of Arts and Sciences.
    Katastrofisk design: Ett designförslag för en digital scenarioeditor2014Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [sv]

    Målet med det här arbetet var att skapa en konceptuell designprototyp för en scenarioeditor åt en digital version av utbildningsverktyget Emergo Train System. Rapporten ämnar ta upp och presentera den arbetsprocess som lett fram till designprototypen och dess utvärdering. I rapporten tillkommer även en diskussion kring hur en scenarioeditor bör utformas för att stödja skapandet av ETS-scenarion samt hur ett flexibelt arbetssätt stöds i form av skapandet av scenariorepresentationer.

    Intervjuer genomfördes med instruktörer och systemansvarige för ETS, samt observationer av iordningställande av ett ETS-scenario. Datainsamlingen analyserades och resulterade i en kravspecifikation för den digitala scenarioeditorn. Den prototyp som utformades gjordes så i pappersformat och utvärderades tillsammans med personal från Katastrofmedicinskt centrum i Linköping. 

  • 14.
    Altgärde, Noomi
    Linköping University, Department of Physics, Chemistry and Biology.
    Local release of lithium from sol-gel coated orthopaedic screws: an in vitro and in vivo study2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

     

    In orthopaedic practice, fractures are usually stabilised with metal screws or rods. This is done in order to keep the fracture parts in place during the rather slow healing process. The healing time can potentially be reduced by local- or systemic treatment with different bone promoting drugs. In later years, lithium, otherwise used to treat bipolar disease, has shown promise to be such a drug.

     

    The aim of this master thesis was to find a way to coat metal bone screws with lithium and to characterise the coating. The coating was to be designed in such a way that it could release lithium to the surrounding bone tissue.

     

    Lithium chloride was incorporated into a titanate sol-gel and attached to silicon wafers and stainless steel screws by dip coating. Wafers were used for initial in vitro studies of how lithium changed coating characteristics. This was studied using ellipsometry, AFM and SEM. Lithium is most probably physisorbed and not incorporated into the network building up the sol-gel. Coating structure is changed as more lithium is incorporated. For large amounts of lithium, the nanoparticles normally formed when curing the sol-gel are inhibited. One effect of this is reduced bioactivity, seen as a reduced ability for calcium phosphate crystals to nucleate on the coating when immersed in simulated body fluid.

    Lithium release was investigated using AAS. Lithium is released from the coating, showing a burst effect. By changing the number of coating layers used, the release profile can be partly altered. The coating was also applied to screws, showing good attachment, and the lithium release profile was similar to the one seen from wafers.

    Finally, a screw model was used in rats to assess the effect of local lithium treatment from screws and systemic lithium treatment on fracture healing. In the model, a screw was inserted in tibia, mimicking a fracture. When the bone around the screw was healed, a pullout test was performed, giving information about the strength of the bone surrounding the screw. No significant difference could be found for either local- or systemic lithium treatment compared to control. However, when evaluating the strength of intact bone in a similar way, a positive effect of systemic lithium treatment could be seen. Therefore, it is still likely that lithium has a positive effect on bone and further studies are needed to fully evaluate its role in fracture healing.

     

  • 15.
    Amundin, Mats
    et al.
    Kolmården Wildlife Park.
    Hållsten, Henrik
    Filosofiska institutionen, Stockholms universitet.
    Eklund, Robert
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Karlgren, Jussi
    Kungliga Tekniska Högskolan.
    Molinder, Lars
    Carnegie Investment Bank, Swedden.
    A proposal to use distributional models to analyse dolphin vocalisation2017In: Proceedings of the 1st International Workshop on Vocal Interactivity in-and-between Humans, Animals and Robots, VIHAR 2017 / [ed] Angela Dassow, Ricard Marxer & Roger K. Moore, 2017, 31-32 p.Conference paper (Refereed)
    Abstract [en]

    This paper gives a brief introduction to the starting points of an experimental project to study dolphin communicative behaviour using distributional semantics, with methods implemented for the large scale study of human language.

  • 16.
    Ander, Julia
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Coating actions for an intersection affected by repeated rutting.2013Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Korsningar, busshållplatser, söderbackar och lastkajer är ytor med extrem påkänning på grund av hög trafikbelastning, låg hastighet, accelerationer, inbromsningar, svängningar, spårbundenhet och utsatthet för höga temperaturer. Den speciella lastsituationen riskerar orsaka spårbildning, vilket är det vanligaste problemet i korsningar. Genom att anpassa beläggningen efter den utsatta ytan så kan projektören påverka vägens funktion och livslängd. Syftet med detta examensarbete var att studera vilka beläggningsåtgärder som är lämpliga för utsatta körytor såsom korsningar och busshållplatser samt att se vad som orsakar skadebilden i en skadedrabbad korsning. Vidare var syftet att jämföra tre beläggningsalternativ för att se vilket som var mest fördelaktigt ur ett livslängds- och kostnadsperspektiv. Frågeställningarna var följande: 1. Vilka beläggningar är lämpliga för särskilt utsatta körytor såsom korsningar och busshållplatser? 2. Vad orsakar skadebilden vid frånfarten på Malmslättsvägen vid korsningen Malmslättsvägen/ Kaserngatan? 3. Vilken beläggningsåtgärd av ABS11, Densiphalt och PMA är bäst ur ett livslängd- och kostnadsperspektiv under 20 år för korsningen Malmslättsvägen/ Kaserngatan? För att besvara frågeställningarna gjordes litteraturstudier samt en fallstudie i form av okulär bedömning och balkanalys i det aktuella vägsnittet. Dessutom jämfördes livslängd och kostnader mellan beläggningsalternativen i PMS Objekt respektive genom en ekonomisk beräkningsmetod. Resultatet visade att ett bindlager kan uppta de skjuvkrafter som uppstår på utsatta ytor och förhindrar därmed sprickbildning och deformationer. CBÖ och platsgjuten betong har i studier visat begränsa spårbildning. Densiphalt är lämplig som beläggning på utsatta ytor och ger samtidigt ytan motståndskraft mot olja och bensin. IM är starkare, styvare och mindre deformationsbenägen än en vanlig asfalt och är därför lämplig på högtrafikerade vägar. Fallstudien på det aktuella vägsnittet visade att skadebilden hade två orsaker. Dels fanns ett ytslitage som var orsakat av den spårbundna dubbdäckstrafiken. Dessutom förekom plastisk deformation i det andra och tredje asfaltlagret till följd av otillräcklig stabilitet i asfaltmassan med hänsyn till den långsamtgående och stillastående trafiken. De obundna lagren var till synes opåverkade vid balkanalysen. Jämförelsen mellan beläggningsalternativen visade att Densiphalt hade längst livslängd följt av PMA och ABS11. Kostnadsmässigt hade PMA lägst annuitet följt av Densiphalt och ABS11. Orsaken till att ABS11 var dyrast var troligen behovet av mellanliggande akutåtgärder i form av gjutasfalt. Slutsatsen var att kompletterande bindlager, CBÖ, PMA, Densiphalt, betong och IM var lämpliga beläggningar för särskilt utsatta ytor. Skadebilden vid det undersökta vägsnittet bedömdes bero på ytslitage på grund av spårbunden dubbdäckstrafik samt plastisk deformation till följd av tung trafik. Densiphalt hade längst livslängd och PMA hade lägst annuitet. Konventionell ABS11 var sämst ur både livslängds- och kostnadsperspektiv, vilket bedömdes bero på behovet av mellanliggande akutåtgärder i form av gjutasfalt.

  • 17.
    Andersson, Ann-Christine
    et al.
    Linköping University, Department of Management and Engineering, Quality Technology and Management. Linköping University, The Institute of Technology.
    Elg, Mattias
    Linköping University, HELIX Vinn Excellence Centre. Linköping University, Department of Management and Engineering, Quality Technology and Management. Linköping University, The Institute of Technology.
    Perseius, Kent-Inge
    Kalmar County Council, Sweden.
    Idwall, Ewa
    Malmö University, Sweden .
    Evaluating a questionnaire to measure improvement initiatives in Swedish healthcare2013In: BMC Health Services Research, ISSN 1472-6963, E-ISSN 1472-6963, Vol. 13, no 48Article in journal (Refereed)
    Abstract [en]

    BACKGROUND:

    Quality improvement initiatives have expanded recently within the healthcare sector. Studies have shown that less than 40% of these initiatives are successful, indicating the need for an instrument that can measure the progress and results of quality improvement initiatives and answer questions about how quality initiatives are conducted. The aim of the present study was to develop and test an instrument to measure improvement process and outcome in Swedish healthcare.

    METHODS:

    A questionnaire, founded on the Minnesota Innovation Survey (MIS), was developed in several steps. Items were merged and answer alternatives were revised. Employees participating in a county council improvement program received the web-based questionnaire. Data was analysed by descriptive statistics and correlation analysis. The questionnaire psychometric properties were investigated and an exploratory factor analysis was conducted.

    RESULTS:

    The Swedish Improvement Measurement Questionnaire consists of 27 items. The Improvement Effectiveness Outcome dimension consists of three items and has a Cronbach's alpha coefficient of 0.67. The Internal Improvement Processes dimension consists of eight sub-dimensions with a total of 24 items. Cronbach's alpha coefficient for the complete dimension was 0.72. Three significant item correlations were found. A large involvement in the improvement initiative was shown and the majority of the respondents were satisfied with their work.

    CONCLUSIONS:

    The psychometric property tests suggest initial support for the questionnaire to study and evaluate quality improvement initiatives in Swedish healthcare settings. The overall satisfaction with the quality improvement initiative correlates positively to the awareness of individual responsibilities.

  • 18.
    Andersson, Daniel
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Sandholm, Christian
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Total Cost Analysis of frame suppliers in construction2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Gotec, som är ett bygg och förvaltningsföretag, är just nu inne på etapp ett av ett byggprojekt i Vallastaden, Linköping. För etapp ett slöt Gotec ett avtal med den polska stomleverantören Baumat, att de skulle leverera samtliga stommar till Gotecs byggnader i projektet. Valet av leverantör baserades till största del på det låga inköpspriset. Dock upplever Gotec idag att det har uppstått vissa problem med Baumat som leverantör. Ett problem som Gotec upplever är att kommunikationen inte har fungerat så bra som de hade hoppats på, detta då engelskan är ytterst bristfällig inom Baumat. Andra problem som märkts av under samarbetet är bland annat att flexibiliteten och leveransprecisionen inte har varit perfekt. Detta har lett till att leveransförseningar har uppstått som i sin tur har givit upphov till extra kostnader, så kallade ÄTOR. Denna fallstudie utreder vilken leverantör av stommar som skulle vara det bästa alternativet för Gotec att använda sig av vid ett byggprojekt i Vallastaden i framtiden. En leverantör från ett lågkostnadsland eller en leverantör från Sverige. De leverantörer som utreds är Gotecs nuvarande leverantör Baumat som representerar en leverantör från ett lågkostnadsland och Strängbetong som representerar en leverantör från Sverige.

  • 19.
    Andersson, Elise
    Linköping University, Department of Management and Engineering, Carl Malmsten - furniture studies. Linköping University, The Institute of Technology.
    In Varying Shades of Brown: Searching the colourful past of a 18th century masterpiece2012Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The colourful past of the late 18th century marquetry furniture has seldom been highlighted. Through ageing and environmental influences, colourful marquetry furniture has lost their original expression. The current knowledge of how Swedish cabinet-makers in the late 18th century used dyes to colour their furniture is limited. Trace of colour has been observed and the use of dyes has been mentioned, but deeper research in this filed is missing.

    A visual examination and studies of archive documents and previous research have been performed to investigate the colourful past of Gottlieb Iwerssons masterpiece, a secretaire in Gustavian style made for the king Gustav III. The result shows that the secretaire has a colourful past in accordance with its original drawing. A hypothetical picture has been created to illustrate the colourful original appearance.

  • 20.
    Andersson, Filip
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    GPGPU-Sim2014Independent thesis Basic level (university diploma), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This thesis studies the impact of hardware features of graphics cards on performance of GPU computing using GPGPU-Sim simulation software tool. GPU computing is a growing topic in the world of computing, and could be an important milestone for computers. Therefore, such a study that seeks to identify the performance bottlenecks of the program with respect to hardware parameters of the devvice can be considered an important step towards tuning devices for higher efficiency.

    In this work we selected convolution algorithm - a typical GPGPU application - and conducted several tests to study different performance parameters. These tests were performed on two simulated graphics cards (NVIDIA GTX480, NVIDIA Tesla C2050), which are supported by GPGPU-Sim. By changing the hardware parameters of graphics card such as memory cache sizes, frequency and the number of cores, we can make a fine-grained analysis on the effect of these parameters on the performance of the program.

    A graphics card working on a picture convolution task releis on the L1 cache but has the worst performance with a small shared memory. Using this simulator to run performance tests on a theoretical GPU architecture could lead to better GPU design for embedded systems.

  • 21.
    Andersson, Jon Martin
    Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics . Linköping University, The Institute of Technology.
    Controlling the Formation and Stability of Alumina Phases2005Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In this work, physical phenomena related to the growth and phase formation of alumina, Al2O3, are investigated by experiments and computer calculations. Alumina finds applications in a wide variety of areas, due to many beneficial properties and several existing crystalline phases. For example, the α and κ phases are widely used as wear-resistant coatings due to their hardness and thermal stability, while, e.g., the metastable γ and θ phases find applications as catalysts or catalyst supports, since their surface energies are low and, hence, they have large surface areas available for catalytic reactions.

    The metastable phases are involved in transition sequences, which all irreversibly end in the transformation to the stable α phase at about 1050 °C. As a consequence, the metastable aluminas, which can be grown at low temperatures, cannot be used in high temperature applications, since they are destroyed by the transformation into α. In contrast, α-alumina, which is the only thermodynamically stable phase, typically require high growth temperatures (~1000 °C), prohibiting the use of temperature sensitive substrates. Thus, there is a need for increasing the thermal stability of metastable alumina and decreasing the growth temperature of the α phase.

    In the experimental part of this work, hard and single-phased α-alumina thin films were grown by magnetron sputtering at temperatures down to 280 °C. This dramaticdecrease in growth temperature was achieved by two main factors. Firstly, the nucleation stage of growth was controlled by pre-depositing a chromia “template” layer, which is demonstrated to promote nucleation of α-alumina. Secondly, it is shown that energetic bombardment was needed to sustain growth of the α phase. Energy-resolved mass spectrometry measurements demonstrate that the likely source of energetic bombardment, in the present case, was oxygen ions/atoms originating from the target surface. Overall, these results demonstrate that low-temperature α-alumina growth is possible by controlling both the nucleation step of growth as well as the energetic bombardment of the growing film. In addition, the mass spectrometry studies showed that a large fraction of the deposition flux consisted of AlO molecules, which were sputtered from the target. Since the film is formed by chemical bonding between the depositing species, this observation is important for the fundamental understanding of alumina thin film growth.

    In the computational part of the work, the effect of additives on the phase stability of α- and θ-alumina was investigated by density functional theory calculations. A systematic study was performed of a large number of substitutional dopants in the alumina lattices. Most tested dopants tended to reverse the stability between α- and θ-alumina; so that, e.g., Modoping made the θ phase energetically favored. Thus, it is possible to stabilize the metastable phases by additives. An important reason for this is the physical size of the dopant ions with respect to the space available within the alumina lattices. For example, large ions induced θ stabilization, while ions only slightly larger than Al, e.g., Co and Cu, gave a slight increase in the relative stability of the α phase. We also studied the stability of some of these compounds with respect to pure alumina and other phases, containing the dopants, with the result that phase separations are energetically favored and will most likely occur at elevated temperatures.

    List of papers
    1. Microstructure of α-alumina thin films deposited at low temperatures on chromia template layers
    Open this publication in new window or tab >>Microstructure of α-alumina thin films deposited at low temperatures on chromia template layers
    2004 (English)In: Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, ISSN 0734-2101, E-ISSN 1520-8559, Vol. 22, no 1, 117-121 p.Article in journal (Refereed) Published
    Abstract [en]

    Radio frequency sputtering has been used to deposit -alumina (-Al2O3) thin films at substrate temperatures of 280–560 °C. The films are shown to be single phased and hard. Nanoindentation gives values of 306±31 and 27±3 GPa for elastic modulus and hardness, respectively, for a substrate temperature of 280 °C. Growth of the phase was achieved by in situ predeposition of a chromia template layer. Chromia crystallizes in the same hexagonal structure as -alumina, with a lattice mismatch of 4.1% in the a- and 4.6% in the c-parameter, and is shown to nucleate readily on the amorphous substrates (silicon with a natural oxide layer). This results in local epitaxy of -alumina on the chromia layer, as is shown by transmission electron microscopy. The alumina grains are columnar with grain widths increasing from 22±7 to 41±9 nm, as the temperature increases from 280 to 560 °C. This is consistent with a surface diffusion dominated growth mode and suggests that -alumina deposition at low temperatures is possible once initial grain nucleation has occurred. Results are also presented demonstrating chromia/-alumina growth on a technological substrate (Haynes230 Ni-based super alloy, Haynes International, Inc.).

    Keyword
    alumina, chromium compounds, sputtered coatings, indentation, elastic moduli, hardness, sputter deposition, transmission electron microscopy, epitaxial layers, grain size, surface diffusion, nucleation, wear resistant coatings, thermal barrier coatings
    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:liu:diva-13578 (URN)10.1116/1.1636157 (DOI)
    Available from: 2008-11-13 Created: 2008-09-29 Last updated: 2017-12-13
    2. Phase control of Al2O3 thin films grown at low temperatures
    Open this publication in new window or tab >>Phase control of Al2O3 thin films grown at low temperatures
    Show others...
    2006 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 513, no 1-2, 57-59 p.Article in journal (Refereed) Published
    Abstract [en]

    Low-temperature growth (500 °C) of α-Al2O3 thin films by reactive magnetron sputtering was achieved for the first time. The films were grown onto Cr2O3 nucleation layers and the effects of the total and O2 partial pressures were investigated. At 0.33 Pa total pressure and ≥ 16 mPa O2 partial pressure α-Al2O3 films formed, while at lower O2 pressure or higher total pressure (0.67 Pa), only γ phase was detected in the films (which were all stoichiometric). Based on these results we suggest that α phase formation was promoted by a high energetic bombardment of the growth surface. This implies that the phase content of Al2O3 films can be controlled by controlling the energy of the depositing species. The effect of residual H2O (10− 4 Pa) on the films was also studied, showing no change in phase content and no incorporated H (< 0.1%). Overall, these results are of fundamental importance in the further development of low-temperature Al2O3 growth processes.

    Place, publisher, year, edition, pages
    Elsevier, 2006
    Keyword
    Aluminum oxide, Chromium oxide, Sputtering, Ion bombardment, X-ray diffraction
    National Category
    Physical Sciences
    Identifiers
    urn:nbn:se:liu:diva-14318 (URN)10.1016/j.tsf.2006.01.016 (DOI)
    Note
    Original publication: Andersson, J.M., Wallin, E., Helmersson, U., Kreissig, U. and Münger, E.P., Phase control of Al2O3 thin films grown at low temperatures, 2006, Thin Solid Films, (513), 1-2, 57-59. http://dx.doi.org/10.1016/j.tsf.2006.01.016. Copyright: Elsevier B.V., http://www.elsevier.com/ Available from: 2007-03-02 Created: 2007-03-02 Last updated: 2017-12-13Bibliographically approved
    3. Molecular content of the deposition flux during reactive Ar/O2 magnetron sputtering of Al
    Open this publication in new window or tab >>Molecular content of the deposition flux during reactive Ar/O2 magnetron sputtering of Al
    2006 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 88, no 05, Art. No. 054101 JAN 30 2006- p.Article in journal (Refereed) Published
    Abstract [en]

    The deposition flux obtained during reactive radio frequency magnetron sputtering of an Al target in Ar/O2 gas mixtures was studied by mass spectrometry. The results show significant amounts of molecular AlO+ (up to 10% of the Al+ flux) in the ionic flux incident onto the substrate. In the presence of ~10–4 Pa H2O additional OH+ and AlOH+ were detected, amounting to up to about 100% and 30% of the Al+ flux, respectively. Since the ions represent a small fraction of the total deposition flux, an estimation of the neutral content was also made. These calculations show that, due to the higher ionization probability of Al, the amount of neutral AlO in the deposition flux is of the order of, or even higher than, the amount of Al. These findings might be of great aid when explaining the alumina thin film growth process.

    Place, publisher, year, edition, pages
    Institutionen för fysik, kemi och biologi, 2006
    Keyword
    alumina, dielectric thin films, sputter deposition, mass spectra
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-10452 (URN)10.1063/1.2170404 (DOI)
    Note
    Original publication: Andersson, J.M., Wallin, E., Münger, E.P. & Helmersson, U., Molecular content of the deposition flux during reactive Ar/O2 magnetron sputtering of Al, 2006, Applied Physics Letters, (88), 054101. http://dx.doi.org/10.1063/1.2170404. Copyright: American Institute of Physics, http://apl.aip.org/apl/top.jspAvailable from: 2007-12-17 Created: 2007-12-17 Last updated: 2017-12-14
    4. Effects of additives in α- and θ-alumina: an ab initio study
    Open this publication in new window or tab >>Effects of additives in α- and θ-alumina: an ab initio study
    2004 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, Vol. 16, no 49, 8971-8980 p.Article in journal (Refereed) Published
    Abstract [en]

    It is of high fundamental and practical importance to be able to control the formation and stability of the different crystalline phases of alumina (Al2O3). In this study, we have used density functional theory methods to investigate the changes induced in the thermodynamically stable α phase and the metastable θ phase as one eighth of the Al atoms are substituted for different additives (Sc, W, Mo, Cr, Cu, Si, and B). The calculations predict that the additives strongly affect the relative stability between the two phases. Most tested additives are shown to shift the relative stability towards, and in some cases completely stabilize, the θ phase, while Cu doping is predicted to increase the relative stability of the α phase. The reasons for these effects are discussed, as are possible implications on the growth and use of doped aluminas in practical applications. In addition, the effects of the additives on bulk moduli and densities of states have been investigated.

    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:liu:diva-13581 (URN)10.1088/0953-8984/16/49/012 (DOI)
    Available from: 2005-12-13 Created: 2005-12-13 Last updated: 2013-10-30
    5. Ab initio calculations on the effects of additives on alumina phase stability
    Open this publication in new window or tab >>Ab initio calculations on the effects of additives on alumina phase stability
    Show others...
    2005 (English)In: Physical review. B, Condensed matter and materials physics, ISSN 1098-0121, Vol. 71, no 014101, 014101- p.Article in journal (Refereed) Published
    Abstract [en]

    The effects of substitutional additives on the properties and phase stability of - and -alumina (Al2O3), are investigated by density functional theory total energy calculations. The dopants explored are 5 at. % of Cr, Mo, Co, and As substituting for Al, respectively, N and S substituting for O, in the and lattices. Overall, the results show that it is possible to shift, and even reverse, the relative stability between - and -alumina by substitutional additives. The alumina bulk moduli are, in general, only slightly affected by the dopants but density of states profiles reveal additional peaks in the alumina band gaps. We also show that phase separations into pure oxides are energetically favored over doped alumina formation, and we present results on a number of previously unstudied binary oxides.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13582 (URN)10.1103/PhysRevB.71.014101 (DOI)
    Available from: 2005-12-13 Created: 2005-12-13 Last updated: 2013-10-30
    6. Energy distributions of positive and negative ions during magnetron sputtering of an Al target in Ar/O2 mixtures
    Open this publication in new window or tab >>Energy distributions of positive and negative ions during magnetron sputtering of an Al target in Ar/O2 mixtures
    2006 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 100, no 3, Art. No. 033305 AUG 1 2006- p.Article in journal (Refereed) Published
    Abstract [en]

    The ion flux obtained during reactive magnetron sputtering of an Al target in Ar/O2 gas mixtures was studied by energy-resolved mass spectrometry, as a function of the total and O2 partial pressures. The positive ions of film-forming species exhibited bimodal energy distributions, both for direct current and radio frequency discharges, with the higher energy ions most likely originating from sputtered neutrals. For the negative oxygen ions a high-energy peak was observed, corresponding to ions formed at the target surface and accelerated towards the substrate over the sheath potential. As the total pressure was increased the high-energy peaks diminished due to gas-phase scattering. Based on these results, the role of energetic bombardment for the phase constituent of alumina thin films are discussed.

    Place, publisher, year, edition, pages
    College Park, MD, United States: American Institute of Physics (AIP), 2006
    Keyword
    aluminium, sputter deposition, diffusion, mass spectra, high-frequency discharges, plasma materials processing
    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:liu:diva-10472 (URN)10.1063/1.2219163 (DOI)000239764100014 ()
    Note

    Original publication: Jon M. Andersson, E. Wallin, E. P. Münger & U. Helmersson, Energy distributions of positive and negative ions during magnetron sputtering of an Al target in Ar/O2 mixtures, 2006, Journal of Applied Physics, (100), 033305. http://dx.doi.org/10.1063/1.2219163. Copyright: American Institute of Physics, http://jap.aip.org/jap/top.jsp

    Available from: 2007-12-19 Created: 2007-12-19 Last updated: 2017-12-14
  • 22.
    Andersson, Mari
    et al.
    Linköping University, Department of Management and Engineering, Carl Malmsten - furniture studies. Linköping University, The Institute of Technology.
    Rovin, Elin
    Linköping University, Department of Management and Engineering, Carl Malmsten - furniture studies. Linköping University, The Institute of Technology.
    Strukturer: Experiment med hantverkstekniker2012Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [sv]

    I vårt examensarbete har vi experimenterat medtraditionella hantverkstekniker i syfte att hitta nya sättatt använda oss av dem i inredningar och på möbler.Som tapetserare var vi intresserade av att utgå ifråndessa tekniker för att upptäcka nya sätt att skapaspännande strukturer i klädselarbetet på möbler.

    I den inledande delen går vi in på de frågor vi villundersöka samt vad som är målet med vårt arbete.Därefter följer huvuddelen där de praktiska testernaredovisas. Här har vi praktiskt testat och arbetatutifrån ett stort antal tekniker för att se vilka som harpotential att användas för vårt syfte. Dessa har tillstörsta delen varit väl beprövade hantverksteknikersom vi har försökt förnya till exempel genom attanvända oss av andra material än vad som vanligtvisanvänds, ändra dimension eller enbart genom attsätta in tekniken i ett nytt sammanhang. I denavslutande delen beskriver vi utvecklingen ochresultatet av ett fåtal tekniker som vi arbetat vidaremed. Vi avslutar med en sammanfattning och enreflekterande diskussion.

    Det har varit en otroligt spännande och kreativprocess som har utmynnat i många intressanta idéeroch objekt.

  • 23.
    Andersson, Markus
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Blomdahl, Rikard
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Adjusting route charges to increase profit2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Route charges are fees that airlines pay in order to utilize the Air Navigation Services (ANS) of a European state. The fee is based on three values; the weight of the aircraft, the length of the flight, and the state’s specific unit rate. The unit rate of each state is in turn based on the forecasted costs of providing ANS for that state and the amount of traffic forecasted for the year to come.

    This makes for different unit rates for different states, which leads to different costs for flying different routes in the European airspace. A state having costs that are increasing faster than the amount of traffic is increasing will lead to a higher unit rate. A higher unit rate may lead to airlines avoiding the state’s airspace due to higher costs, thus accounting for even less traffic and an increase in unit rate.

    This thesis examines the relationship between unit rate and amount of traffic, and specifically tries to find out how much the unit rate affects the traffic count. This has been done by reading previous papers on the subject, and creating a model to easily present facts found.

    The result of the thesis suggests that states actually profits more by increasing the unit rate rather than actively trying to reduce it. This contradicts the idea of lowering prices always being a good thing. There is a limit to how much the unit rate can be increases however, at which all traffic will choose to circumnavigate the airspace. Finding a good balance between traffic lost and unit rate increased is suggested as the best way to go.

  • 24.
    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.

  • 25.
    Andersson, Matilda
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Wandfelt, Fredrik
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Optimization of maintenance system2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report presents an optimization of the allocation of maintenance resources for Air Navigation Service (ANS) equipment of which LFV is responsible for the maintenance. The purpose the authors have worked after is to research ways of minimizing travelling time linked to maintenance visits for ANS equipment, this report includes the suggestions where the maintenance facilities should be placed in order to minimize the total travelling time. The report describes the problem background and presents the customer, LFV. It includes a chapter on some of the theories used for facility location and routing, and also presents methods for reducing the total travelling time used for maintenance visits annually. The authors have worked with a given set of airports in Sweden. Information about the general work with maintenance as well as the annual demand of maintenance, including the frequency of visits, for each airport included in this project was received by Pär Oberger, the task expert and contact at LFV for this report. A model for facility location based on the p-median model have been created and used when solving the problem, it was written in AMPL and solved with the CPLEX solver. The model was modified with two additional constraints regulating the minimum annual working time and the maximum distance for one-way travelling. The authors deems that a solution with five facilities is better since the benefit of additional facilities, in term of lower total distance, do not compensate for the assumed cost of establishing them.

  • 26.
    Andersson, Mike
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Tailoring of SiC based field effect gas sensors for improved selectivity t non-hydrogen containing species2010In: IMCS13 2010, 2010, 369- p.Conference paper (Refereed)
  • 27.
    Andersson, Mike
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Pearce, Ruth
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. NPL, London from March 2012.
    Recent trends in Silicon Carbide (SiC) and Graphene based gas sensors2013In: Semiconductor Gas Sensors / [ed] R. Jaaniso and O. K. Tan, Woodhead Publishing Limited, 2013, 117-158 p.Chapter in book (Refereed)
    Abstract [en]

    The introduction of silicon carbide (SiC) as the semiconductorin gas sensitive field effect devices has tremendously improved this sensor platform extending the temperature range and number of detectable gases. Here we review the recent trends in research, starting with transducer mechanisms, latest findings regarding the detection mechanism, and present new material combinations as sensing layers and smart operation of the field effect sensors enabling one sensor to act as a sensor array. Introducing epitaxially-grown graphene on SiC as gas sensing layer shows the potential of ppb detection of NO2 .

  • 28.
    Andersson, Mike
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering. University of Oulu, Finland.
    Möller, Peter
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Fashandi, Hossein
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Huotari, J.
    University of Oulu, Finland.
    Puustinen, J.
    University of Oulu, Finland.
    Lappalainen, J.
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering. University of Oulu, Finland.
    Field Effect Based Gas Sensors, from Basic Mechanisms to the Latest Commercial Device Designs2016In: SENSORS AND ELECTRONIC INSTRUMENTATION ADVANCES (SEIA), INT FREQUENCY SENSOR ASSOC-IFSA , 2016, 19-21 p.Conference paper (Refereed)
    Abstract [en]

    This contribution treats the latest developments in the understanding of basic principles regarding device design, transduction mechanisms, gas-materials-interactions, and materials processing for the tailored design and fabrication of SiC FET gas sensor devices, mainly intended as products for the automotive sector.

  • 29.
    Andersson, Per
    Linköping University, Department of Management and Engineering.
    Radio Frequency Thermal Treatment of Liver Tumours: -Influence of Blood Perfusion and Large Vessels2008Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [en]

    Radio frequency ablation (RFA) is a commonly used minimally invasive method of treating liver cancer tumours which utilises RF current for heating tumour tissue up to a lethal temperature. RF current is generated by a power generator and applied to the tumour by an electrode which is inserted into the tumour either during percutaneous or open surgery.

    RFA is a method that has great advantages compared to traditional surgical resection of tumours due to minimal invasiveness, it can be used for a greater number of patients and enables repeated treatments. Even though there are many advantages coupled to RFA there are still some problems and difficulties associated with the method. One of these problems is the cooling effect from large vessel blood flow within the liver, the so called heat sink effect.

    The aim of this master thesis work has been to develop a theoretical finite element model of RFA within Comsol Multiphysics software. This theoretical model has been used to simulate blood perfusion effects on resulting ablation volume. The effects from different large vessel blood flow parameters has been investigated, these parameters are: blood flow velocity, blood vessel diameter and distance between blood vessel and RF electrode. A factorial design has been utilised to setup parameter levels for the different simulations. A linear- and a second degree regression model has been calculated based on simulation results. The parameter with largest impact on simulative ablation volume and the interaction effects between the parameters were determined from the regression model coefficients. In addition to this has two simulations been performed, modelling perfused- and unperfused liver tissue, in order to investigate the effects resulting from microvascular perfusion.

    The result shows that the parameter with largest impact on simulative ablation volume are the distance, it was also shown that there are a small interactional effects between diameter and distance, where a small distance increases the effect from a varying diameter. Modelled microvascular perfusion was shown to give a decrease in simulative ablation volume. A shortage of this master thesis work is the lack of experimental verification of the developed model.

  • 30.
    Anund, Anna
    et al.
    VTI, Linköping.
    Tapani, Andreas
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Chalkia, E
    Watch Out! Something Precious is Moving2011In: Infrastructure and Safety in a Collaborative World: Road Traffic Safety / [ed] Evangelos Bekiaris, Marion Wiethoff, Evangelia Gaitanidou, Berlin Heidelberg: Springer Berlin/Heidelberg, 2011, 1, 233-242 p.Chapter in book (Other academic)
    Abstract [en]

    One critical situation when a driver needs to have a high degree of awareness, to avoid critical situations or crashes, is when passing a school bus, stopped for boarding or de-boarding of children. With the help of an experiment in VTI’s moving base driving simulator, a scenario, using in-vehicle information before the bus was reached, was tested. The aim was to enhance drivers’ perception, in order to reduce the speed of vehicles passing by the stopped bus. Both alert and sleep deprived drivers were tested. The results showed a significant speed reduction thanks to the information given beforehand. Sleep deprivation did not seem to have an impact on speed reduction. This suggests that the warning signals are seen and followed, regardless the drivers’ state of alertness. Thus, it seems likely that this type of information may be useful as an Intelligent Transport System (ITS), to provide driver support about upcoming hazards. One step towards further research in this direction is performed within the EU project SAFEWAY2SCHOOL, the main objectives of which are presented at the end of this chapter.

  • 31.
    Arbring, Theresia
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    The impact of geometrical variations on the transport properties of organic electronic ion pumps2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The organic electronic ion pump (OEIP) is an electrically controlled polymer-based device that has the capability to interact with biological systems down to a single cell level by mimicking neural signalling. This is accomplished by translation of an electrical signal into a chemical output, such as ions and neurotransmitters. Because of the combined spatial and temporal precision, this is a technology with a promising future as an advanced therapeutic device. Depending on the application, the OEIP requires different geometries. Implants that will be used to control on a single cell level require very small dimensions, while for example extracorporeal mounted OIEPs, with only the delivery channel penetrating the skin, require much longer channels. Despite the application, it is necessary to have a good knowledge about the transport and delivery properties and how they change due to the geometry. These properties have been observed as very varying and unstable in early unpublished results, and these findings motivate this project. This project includes photolithographic fabrication and investigation of transport and delivery properties such as effective resistance, efficiency and stability of OEIPs with varying delivery channel lengths and widths. Shorter delivery channels show a consistent but relatively low efficiency. Delamination between different layers of the device is suspected as the cause. Initially, the longer delivery channels show a low functionality, most probably due to poor encapsulation. It is suggested that a soft, water-permeable plastic best encapsulates OEIPs that will be used as a medical implant, while a material impermeable to water, for example a metal, could successfully encapsulate OEIPs operating in air.

  • 32.
    Arding, Fredrik
    Linköping University, Department of Physics, Chemistry and Biology, Biotechnology. Linköping University, Faculty of Science & Engineering.
    Sensory evaluation and quality assessment of an alternative inner coating film in yogurt cartons2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The dairy food industry is continuously striving towards products with higher quality and longer shelf-life available to the customer at low prices. Arla Foods in Linköping, Sweden, is currently investigating the possibilities of changing the material in yogurt packaging containers by replacing the currently used carton with a different and cheaper alternative. A successful switch will give the company an economical advantage without affecting the sensory attributes (smell, taste, sight, and consistency), aroma profile or other important trademarks of the yogurt. This study is designed to examine and compare yogurt that has been stored in different packaging cartons, one coated with a single-layered low-density polyethylene (LDPE) and one coated with a currently used multi-layered ethylene-vinyl alcohol (EVOH).

    The study was based on the analysis and measurement of sensory attributes performed by experts, physical properties in laboratory and chemical composition in GC-FID/MS together with a discriminative test where a group of people would identify any difference between the yogurts. Together, these analyses would provide an explanation about any differences between the packaging materials by connecting physical, chemical and/or sensory characteristics. The collected results would give a better and more comprehensive picture than each analysis would do separately.

    The results from the study show that there is a difference between yogurts stored in LDPE-based containers and yogurts stored in EVOH-based containers and that the product was chemically affected, mainly by the level of oxygen in contact with the food. The overall assessment is that the largest difference was discovered in the taste.

  • 33.
    Arhall, Johanna
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Cox, Emmie
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Key Performance Indicators for SAS Flights2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Revenue management is a thoroughly researched field of study and it is widely used in several different industries. The Revenue Management Department at the airline SAS (Scandinavian Airline System) serves to maximise the profit of the company’s flights. At their disposal they have a number of tools, which use KPIs (Key Performance Indicators) as a measurement. The KPIs are used in prognosis to determine future initiatives, and to analyse and verify results. SAS does not know if the KPIs they focus on to measure performance are the most relevant for optimisation of revenue for their flights. In an attempt to simplify the use of SAS’ optimisation system we have performed a correlation analysis on a set of selected KPIs and assessed the influence relationships between these KPIs, in order to identify pivotal KPIs. Furthermore, we have researched origindestination control and the network effect to broaden the scope of the investigation. We have presented the work and the results in this thesis. The correlation analysis was performed using data, spanning a two-year period, for domestic flights (within Sweden) provided by SAS. The results of the analysis showed that the assessed KPIs could be divided into three groups; within each group the KPIs are closely correlated. As a result, we concluded that to focus on one KPI in each group should be adequate for evaluating performance. The three pivotal KPIs are revenue passenger kilometre, cabin factor and revenue per available seat kilometre. We have recommended SAS to continue working with origin-destination control and that the pivotal KPIs should be used as a measurement for the network, as well as measurements such as net leg revenue. Additionally, we have suggested that SAS conducts equivalent or similar analyses in other suitable areas to identify or confirm pivotal KPIs.

  • 34.
    Aronsson, Peter
    Linköping University, Department of Electrical Engineering, Communication Systems.
    Objektdetektering i SAR- och IR-bilder2008Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This report treats detection in IR-pictures taken from airplanes over the ground. The detection is divided in two parts. First there is a detection with filterkernels with the task to point on targets and objects that look like targets. The second part is a discriminator that demands more calculations and has the task to sort out the false alarms from the discriminator. Both the detector and the discriminator contain thresholds thats been trained from trainingsets of data. The results from the detector was better then expected hence it wasn’t possible to test the diskriminator properly.

  • 35.
    Artman, Henrik
    et al.
    Totalförsvarets forskningsinstitut (FOI).
    Brynielsson, Joel
    Totalförsvarets forskningsinstitut (FOI).
    Johansson, Björn
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Trnka, Jiri
    Totalförsvarets forskningsinstitut (FOI).
    Dialogical Emergency Management and Strategic Awareness in Emergency Communication2011In: Proceedings of the 8th International ISCRAM Conference / [ed] Maria A. Santos, Julie Dugdale, David Mendonça, Lissabon, 2011, 1-9 p.Conference paper (Refereed)
    Abstract [en]

     This paper introduces two concepts—dialogical emergency management and strategic awareness—as means to use and understand the content of social media for the purpose of emergency communication. Dialogical emergency management denotes that the emergency management organizations follow what people publish in various social media on emergencies and ongoing emergency response, and then adjust their information strategies in a way that matches the expectations and needs for emergency information of ..

  • 36.
    Arvidsson, Johan
    Linköping University, Department of Management and Engineering, Environmental Technology and Management.
    Distribuerad elproduktion och mikroproduktion av solel: En studie av energibolagens roll vid egenproduktion av el2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Several utility companies are today offering products and services related to microgeneration of solar electricity which may seem irrational since a decreased usage of energy of a customer will lead to a decreased profitability for the core business. An increased demand for microgenerating facilities therefore creates a need for change of the utility companies’ current business models. Solar cells and distributed electricity generation are today developing into new markets that constitutes a new competitive force within the energy sector. The companies need to take this competitive force into account if they are not to be harmed in the long-term as the market develops. The aim of this thesis is to examine how the utility companies can develop their business models in order to support distributed electricity generation and microgeneration of solar electricity in a sustainable way.

    Six different business models have been identified that are used in different parts of the world in order to deploy solar cell technologies. These are 1) customer owned that implies that the customer owns the solar cell facility after delivery, 2) community owned where an utility company or a third-party actor coordinates and runs a solar cell project with several owners or customers, 3) third-party owned that implies that a service company offers a complete solution to end customers and finances this through a third-party actor, 4) cross-selling where solar cells are sold as extra equipment or add-ons to other products, 5) host-owned feed-in that implies that all the generated electricity are fed in to the grid for a high compensation and also 6) modular based value propositions where a customer can choose between different packages of products and services that builds upon each other. The four groups customer related-, supplier related-, policy related- and technology related barriers against diffusion of solar cells and microgeneration could be identified within the theoretical framework of the thesis. In total, 17 theoretical barriers could be identified.

    After an initial study of literature, a proper method constituted by three different parts could be chosen for the empirical work of the thesis. An online focus group discussion is together with desk research providing a foundation for a mapping of contextual opportunities and threats. A focus group discussion was decided to provide a proper combination of width and depth and was executed online since this demands less resources and can reach geographically spread respondents. Desk research was decided to be a proper supplement for the e-focus group. In order to be able to study the current business models in more depth, a case study was also executed constituting five different interviews at a Swedish utility company that offers sales of electricity and solar cells and also is a grid owner.

    The empirical work resulted in a mapping of 38 opportunities and 27 threats that utility companies are faced with as the market for distributed electricity generation and microgeneration of solar electricity expands. There is also a need for contextual changes regarding policies and research as the utility companies are changing their business models. Though, utility companies should be able to anticipate a change towards a more distributed electricity market and implement new business models already today. There should already exist a basis for the utility companies to influence both politics and research through for example industry associations. It can through the result of this thesis be found that microgeneration is a growing substitute to traditional sales of electricity that threatens companies in several activities in the electricity sector. The way Swedish companies handle this new market threat is not sustainable and needs to be changed. This thesis finally presents three different directions that the business models of the utility companies can develop towards.

  • 37.
    Arvola, Mattias
    et al.
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, The Institute of Technology.
    Karsvall, Arvid
    Södertörns Högskola, Institutionen för kommunikation, medier och IT, Medieteknik.
    Tholander, Jakob
    Stockholms universitet, Mobile Life.
    Values and qualities in interaction design meetings2011In: The Endless End: The 9th International European Academy of Design Conference. Porto, Portugal, May 4-7, 2011., 2011Conference paper (Refereed)
    Abstract [en]

    How are values and qualities expressed in interaction design? Previous research into this topic has largely been conceptual. How interaction designers and clients actually reason has only been touched upon in empirical studies. The research question for this paper is how interaction designers, as a collective and in an unfolding design process, concretize values and qualities in meetings with clients. By way of video recordings, we have analyzed two interaction design workshops. The analysis indicated that values were concretized top-down, from general conceptions and the design brief given, while also explored bottom-up. Several kinds of communicative means (e.g. talk, gestures, whiteboards, post-it notes) were used to animate values and design visions. Mixing a top-down and bottom-up approach allowed the designers to be both prescriptive and sensitive the uniqueness of the design situation. Thedifferences in communicative means did not really matter for how values and qualities weremade concrete. What mattered was that people really started talking with each other.

  • 38.
    Axelsson, Anton
    et al.
    Uppsala University, Sweden.
    Andersson, Richard
    IT University of Copenhagen, Denmark; Lund University, Sweden.
    Gulz, Agneta
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences. Lund University, Sweden.
    Scaffolding Executive Function Capabilities via Play-&-Learn Software for Preschoolers2016In: Journal of Educational Psychology, ISSN 0022-0663, E-ISSN 1939-2176, Vol. 108, no 7, 969-981 p.Article in journal (Refereed)
    Abstract [en]

    Educational software in the form of games or so called "computer assisted intervention" for young children has become increasingly common receiving a growing interest and support. Currently there are, for instance, more than 1,000 iPad apps tagged for preschool. Thus, it has become increasingly important to empirically investigate whether these kinds of software actually provide educational benefits for such young children. The study presented in the present article investigated whether preschoolers have the cognitive capabilities necessary to benefit from a teachable-agent-based game of which pedagogical benefits have been shown for older children. The role of executive functions in childrens attention was explored by letting 36 preschoolers (3;9-6;3 years) play a teachable-agent-based educational game and measure their capabilities to maintain focus on pedagogically relevant screen events in the presence of competing visual stimuli. Even though the participants did not succeed very well in an inhibition pretest, results showed that they nonetheless managed to inhibit distractions during game-play. It is suggested that the game context acts as a motivator that scaffolds more mature cognitive capabilities in young children than they exhibit during a noncontextual standardized test. The results further indicate gender differences in the development of these capabilities.

  • 39.
    Axelsson, Peter
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Petersson, Jonas
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, The Institute of Technology.
    Remote Tower Centre - Configuration and Planning of the Remote Tower Modules2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today, many small aerodromes have a hard time surviving economically, and amongst the largest cost is air traffic control. Airlines are cutting costs where they can, and many times this affects the aerodromes as well, e.g. when airlines decide to park remotely instead of at the gate. The project called Remotely Operated Towers, initiated by SESAR and run by Saab and LFV, is aiming to address this problem. The project revolves around remotely providing ATS to aerodromes where it is deemed suitable. A big challenge in this project is how to assign aerodromes to remote tower modules in the remote control centre. There are many ways to do this, but there is only a few ways to do it to achieve the least amount of modules. This thesis aims to find an optimal solution to the challenge mentioned above. The thesis resulted in a model where the user can provide the input of choice, i.e. aerodromes with associated ATS operating hours and movements, for a specific period – and receive the assignment schedule for the modules, saying exactly which aerodrome are to be controlled by which module at what time.

  • 40.
    Axin, Kajsa
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Jonzon, Camilla
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Resource planning for internal logistics: A tool designed for the material handling department at Scania Axles and Gearboxes2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This master thesis is performed at Scania Axles and Gearboxes, a production plant located in Södertälje. Within the plant axles, gearboxes as well as central gears are assembled from components to finished products. All production is conducted on production lines, with a pre-determined rate, which is supplied with components by the material handling department. Since the production quantity and the mix of product variants produced on the production line is customer order-based, the number and type of components needed for production as well as appropriate staffing within the material handling department is difficult to predict. Scania is currently using a number of different resource planning tools for each material handling-department within Axles and Gearboxes to visualize the workload within the departments. These systems however have different structure and are all  not sufficiently  updated, which means that they cannot fulfill their intended purpose. The aim for this thesis is to develop a common tool for the whole department of Axles and Gearboxes which can visualize the amount workload that prevails. This tool should also be able to account for varying production conditions.

    The resource planning tool which has been developed within this project is built upon the basis of a structure for occupancy calculation on a position, which includes the premise that a working position contains a number of operations to be performed a certain number of times during a given a number of working hours. The amount workload within a working position is calculated as the ratio how long an operation takes to perform, the number of times the task needs to be performed and during what amount of time it has to be done. The structure of the tool takes into account the following conditions; production quantity, production rate, volume of incoming and outgoing goods and the mix of product variants assembled on the production line.

    Based on the structure of the occupancy calculation for the material handling department, an additional study has been made to evaluate how the above listed conditions of production affects the occupancy, and to what degree. This study has been conducted using both qualitative and quantitative information obtained from both interviews and historical data extracts. After this data collection, the resource planning tool has been built in Microsoft Excel.

    The developed resource planning tool enables a visualization of the total amount of workload within a working position in the form of a percentage which shows the proportion of working time used during a shift. That percentage presented in the tool varies thereafter when changing any of the above mentioned production conditions. By the end of the thesis, a number of working positions from the department of Axles and Gearboxes has been imported to the resource planning tool to be able to make appropriate testing and sensitivity analysis of the result. The task that Scania has yet to perform before they can use the tool for the whole department is to continue with the work of importing remaining working positions.

    The developed resource planning system and the result of this master thesis is a dynamic tool which Scania can use to predict the need of resources in the material handling department for future changes in production conditions, such as time reductions, increased demand for products or changes in work routines.

  • 41.
    Ballem, Mohamed A.
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials . Linköping University, The Institute of Technology.
    Córdoba, José M.
    Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials . Linköping University, The Institute of Technology.
    Odén, Magnus
    Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials . Linköping University, The Institute of Technology.
    Influence of synthesis temperature on morphology of SBA-16 mesoporous materials with a three-dimensional pore system2010In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 129, 106-111 p.Article in journal (Refereed)
    Abstract [en]

    Spherical particles of mesoporous silica SBA-16 with cubic Im3m structure were synthesized at low pH using Pluronic F127 as template and TEOS as silica source. The diameter of the spherical particles can be controlled in the range of 0.5–8 μm by varying synthesis temperature from 1 °C up to 40 °C. A sharp transition from large particle sizes at approximately 20 °C to smaller ones is observed when the temperature is increased. It is suggested that this morphology transition is due to a change in hydrolysis and condensation rate of the silica source and as a result the assembly of F127 micelles will differ. The SBA-16 samples were characterized using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption techniques.

  • 42.
    Bang, Magnus
    et al.
    Linköping University, Department of Computer and Information Science.
    Ragnemalm, Eva L.Linköping University, Department of Computer and Information Science.
    Persuasive Technology: Design for Health and Safety2012Conference proceedings (editor) (Refereed)
  • 43.
    Barata, J.
    et al.
    Universidade Nova de Lisboa /UNINOVA, Quinta da Torre, 2829-516, Caparica, Portugal .
    Ribeiro, Luis
    Universidade Nova de Lisboa /UNINOVA, Quinta da Torre, 2829-516, Caparica, Portugal.
    Colombo, A-W
    P&T/H6O HUB, Schneider Electric GmbH, Steinheimer Straße 117, 63500, Seligenstadt, Germany.
    A Service-oriented Shop Floor to Support Collaboration in Manufacturing Networks2010In: Artificial Intelligence Techniques for Networked Manufacturing Enterprises Management / [ed] Lyes Benyoucef and Bernard Grabot, Springer London, 2010, 483-503 p.Chapter in book (Refereed)
    Abstract [en]

    The present work addresses the problem of shop-floor agility, presenting it as the fundamental cornerstone for true agility and responsiveness of an enterprise willing to participate in highly dynamic collaborative organizations and supply chains. Clearly, as the economic climate toughens, the exploration of the increasingly volatile business opportunities requires such complex organizations. The feasibility of the architecture proposed is demonstrated in a pilot implementation in a near-real shop-floor. Emerging web standards such as the device profile for web services were used to guarantee cross-layer/abstraction interoperability ensuring that the shop-floor reacts positively to adjustments in the supply chain.

  • 44.
    Barata, José
    et al.
    Electrical Engineering Department, New University of Lisbon, Monte de Caparica, Portuga.
    Ribeiro, Luis
    UNINOVA institute, , Monte de Caparica, Portugal.
    Colombo, Armando
    Schneider Electric GmbH, P&T/H6O HUB, Seligenstadt, German.
    Diagnosis using service oriented architectures (SOA)2007In: Industrial Informatics, 2007 5th IEEE International Conference on  (Volume: 2), IEEE , 2007, Vol. 2, 1203-1208 p.Conference paper (Refereed)
    Abstract [en]

    Service Oriented Architecture (SOA) is an emergent approach to industrial control that accompanies new industrial paradigms in the response to the continuously changing socio-economic challenges posed to modern and future enterprises. Maximizing the profit under adverse market conditions is also a matter of cost cut and the use of distributed and intelligent devices with efficient diagnosis mechanisms can help improving equipment's uptime either by reacting before a breakdown or recovering gracefully from failures.

  • 45.
    Barata, José
    et al.
    Departamento de Engenharia Electrotecnica Universidade Nova de Lisboa Monte da Caparica, Portugal.
    Ribeiro, Luis
    Departamento de Engenharia Electrotecnica Universidade Nova de Lisboa Monte da Caparica, Portugal.
    Onori, Mauro
    KTH-Production Eng. Dept. EPS Group Stockholm, Sweden.
    Diagnosis on evolvable production systems2007In: Industrial Electronics, 2007. ISIE 2007. IEEE International Symposium on, 2007, 3221-3226 p.Conference paper (Refereed)
    Abstract [en]

    Evolvable production systems (EPS) lies at the leading edge of the new paradigms currently emerging as a response to the continuously changing socio-economic challenges that modern enterprises have to deal with. Maximizing the profit under adverse market conditions is also a matter of cost cut and EPS targets this through an efficient diagnosis mechanism embedded in future production systems. Evolvable production systems goes beyond other manufacturing paradigms, and offers intelligent devices with biologically inspired behaviours, heavily dependent on self-diagnosis, self healing and other autonomous actions to ensure the systems' proper functioning and a timely response and recover from unpredictable situations.

  • 46.
    Baroutsi, Nicoletta
    Linköping University, Department of Computer and Information Science. Linköping University, Faculty of Arts and Sciences.
    Ambienta displayer i varuhandeln: Färgkategorisering i tidningssektionen ger en omedelbar vägledning utan ansträngning2012Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [sv]

    En ambient display är menad att fungera för användaren enbart genom att hen snabbt överblickar produkten. Denna form av display är perfekt att nyttja i dagligvaruhandeln där utbuden ständigt växer samtidigt som konsumenten snabbt vill hitta det den söker. I denna studie utforskas fördelarna med att använda färg och symbolkombinationer, som skapar en ambient display, istället för text när det kommer till att kategorisera i tidningssektionen. Feature- integrationsteorin beskriver hur den ambienta displayen ger stöd för användarens kognitiva processer, den är mer effektiv genom att den låter konsumenten använda det perifera seendet i sitt sökande.

    Tidningssektionen är en produkt användaren inte nyttjar frekvent och denna design fungerar genom att kunden redan ska veta hur den önskade kategorin är representerad, det är därför väldigt viktigt att inlärningen sker snabbt. I studien framkommer vikten av att skapa bra associationer mellan färg och kategori, vilket har en extremt signifikant påverkan på inlärningsförmågan hos användaren.

    Studien utvärderar även vilka färg- och kategorikombinationer som är lämpliga för Tidsam, distributör av tidningar. 17 kategorier associeras med 17 olika färger där multipla källor används för att styrka resultatet. Resultatet presenteras i form av virtuella prototyper av kategoriskyltar för samtliga 17 kategorier.

  • 47.
    Bastuck, Manuel
    et al.
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering. University of Saarland, Germany.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Huotari, J.
    University of Oulu, Finland.
    Sauerwald, T.
    University of Saarland, Germany.
    Lappalainen, J.
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. University of Oulu, Finland.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. University of Oulu, Finland.
    Schuetze, A.
    University of Saarland, Germany.
    Exploring the selectivity of WO3 with iridium catalyst in an ethanol/naphthalene mixture using multivariate statistics2016In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 618, 263-270 p.Article in journal (Refereed)
    Abstract [en]

    Temperature cycled operation and multivariate statistics have been used to compare the selectivity of two gate (i.e. sensitive) materials for gas-sensitive, silicon carbide based field effect transistors towards naphthalene and ethanol in different mixtures of the two substances. Both gates have a silicon dioxide (SiO2) insulation layer and a porous iridium (Ir) electrode. One of it has also a dense tungsten trioxide (WO3) interlayer between Ir and SiO2. Both static and transient characteristics play an important role and can contribute to improve the sensitivity and selectivity of the gas sensor. The Ir/SiO2 is strongly influenced by changes in ethanol concentration, and is, thus, able to quantify ethanol in a range between 0 and 5 ppm with a precision of 500 ppb, independently of the naphthalene concentrations applied in this investigation. On the other hand, this sensitivity to ethanol reduces its selectivity towards naphthalene, whereas Ir/WO3/SiO2 shows an almost binary response to ethanol. Hence, the latter has a better selectivity towards naphthalene and can quantify legally relevant concentrations down to 5 ppb with a precision of 2.5 ppb, independently of a changing ethanol background between 0 and 5 ppm. (C) 2016 Elsevier B.V. All rights reserved.

    The full text will be freely available from 2018-08-04 14:48
  • 48.
    Bastuk, Emanuel
    et al.
    Saarland University, Saarbruecken, Germany.
    Bur, Christian
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. Saarland University, Saarbruecken, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Schütze, Andreas
    Saarland University, Saarbruecken, Germany.
    Identification of ammonia and carbon monoxide based on the hysteresis of a gas sensitive silicon carbide field effect transistor2013In: Transducers 2013 & Eurosensors XXVII, IEEE , 2013, 250-253 p.Conference paper (Refereed)
    Abstract [en]

    In this work gate bias cycled operation (GBCO) is used on a gas-sensitive SiC field effect transistor(“GasFET”) to increase the sensitivity and selectivity. Gate bias ramps introduce strong hysteresis in the sensor signal. The shape of this hysteresis is shown to be an appropriate feature both for the discrimination of various gases (NH3, CO, NO, CH4) and also different gas concentrations (250 and 500 ppm). The shape is very sensitive to ambient conditions. Thus, the influence of oxygen concentration and relative humidity as well as sensor temperature is investigated and reasons for the observed signal changes are discussed.

  • 49.
    Belousov, Dennis
    Linköping University, Department of Electrical Engineering, Vehicular Systems.
    Development of a Vehicle Simulation Model Consisting of Low and High Frequency Dynamics2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    As vehicle testing on existing vehicles is both time and resource consuming, the work of testing safety algorithms on vehicle is desired to be made more efficient. Therefore the goal of this thesis is to study and develop a vehicle simulation model that can simulate desired dynamics of existing and non-existing vehicles.

    The developed model consist of two areas of application: slow dynamics and vibrational dynamics. These areas are developed and validated using different methods, but as a part of the simulator, they are to be simulated together.

    For the slow, low frequency, vehicle motion, a three state transient motion model is derived and examined. The possibility of parametrisation is studied and performed using prediction error minimisation.

    For the vibration, high frequency model, a combination of a linear quarter car model with wheel motion is used to estimate road vibration characteristics. The modelled road is used to simulate the vehicle behaviour. The suggested methods regarding the vibration modelling and road estimation are performed using power spectral density as the road is not known determinately. Wheel speeds are used to study the power spectral densities as they are available at high sampling frequencies.

    The available tools and sensors used during this thesis are limited to existing vehicle sensors and GPS signals. The effect of this limitation is studied and the results are discussed.

  • 50.
    Bengtsson, Katarina
    Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.
    Electrokinetic devices from polymeric materials2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    There are multiple applications for polymers: our bodies are built of them, plastic bags and boxes used for storage are composed of them, as are the shells for electronics, TVs, computers, clothes etc. Many polymers are cheap, and easy to manufacture and process which make them suitable for disposable systems. The choice of polymer to construct an object will therefore highly influence the properties of the object itself. The focus of this thesis is the application of commonly used polymers to solve some challenges regarding integration of electrodes in electrokinetic devices and 3D printing.

    The first part of this thesis regards electrokinetic systems and the electrodes’ impact on the system. Electrokinetic systems require Faradaic (electrochemical) reactions at the electrodes to maintain an electric field in an electrolyte. The electrochemical reactions at the electrodes allow electron-to-ion transduction at the electrode-electrolyte interface, necessary to drive a current at the applied potential through the system, which thereby either cause flow (electroosmosis) or separation (electrophoresis). These electrochemical reactions at the electrodes, such as water electrolysis, are usually problematic in analytical systems and systems applied in biology. One solution to reduce the impact of water electrolysis is by replacing metal electrodes with electrochemically active polymers, e.g. poly(3,4-ethylenedioxythiophene) (PEDOT). Paper 1 demonstrates that PEDOT electrodes can replace platinum electrodes in a gel electrophoretic setup. Paper 2 reports an all-plastic, planar, flexible electroosmotic pump which continuously transports water from one side to the other using potentials as low as 0.3 V. This electroosmotic pump was further developed in paper 3, where it was made into a compact and modular setup, compatible with commercial microfluidic devices. We demonstrated that the pump could maintain an alternating flow for at least 96 h, with a sufficient flow of cell medium to keep cells alive for the same period of time.

    The second part of the thesis describes the use of 3D printers for manufacturing prototypes and the material requirements for 3D printing. Protruding and over-hanging structures are more challenging to print using a 3D printer and usually require supporting material during the printing process. In paper 4, we showed that polyethylene glycol (PEG), in combination with a carbonate-based plasticizer, functions well as a 3D printable sacrificial template material. PEG2000 with between 20 and 30 wt% dimethyl carbonate or propylene carbonate have good shear-thinning rheology, mechanical and chemical stability, and water solubility, which are advantageous for a supporting material used in 3D printing.

    The advances presented in this thesis have solved some of the challenges regarding electrokinetic systems and prototype manufacturing. Hopefully this will contribute to the development of robust, disposable, low-cost, and autonomous electrokinetic devices.

    List of papers
    1. Conducting Polymer Electrodes for Gel Electrophoresis
    Open this publication in new window or tab >>Conducting Polymer Electrodes for Gel Electrophoresis
    2014 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 9, no 2, 0089416- p.Article in journal (Refereed) Published
    Abstract [en]

    In nearly all cases, electrophoresis in gels is driven via the electrolysis of water at the electrodes, where the process consumes water and produces electrochemical by-products. We have previously demonstrated that p-conjugated polymers such as poly(3,4-ethylenedioxythiophene) (PEDOT) can be placed between traditional metal electrodes and an electrolyte to mitigate electrolysis in liquid (capillary electroosmosis/electrophoresis) systems. In this report, we extend our previous result to gel electrophoresis, and show that electrodes containing PEDOT can be used with a commercial polyacrylamide gel electrophoresis system with minimal impact to the resulting gel image or the ionic transport measured during a separation.

    Place, publisher, year, edition, pages
    Public Library of Science, 2014
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-105901 (URN)10.1371/journal.pone.0089416 (DOI)000331711900141 ()
    Available from: 2014-04-14 Created: 2014-04-12 Last updated: 2017-12-05Bibliographically approved
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