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  • 201.
    Jezek, Christoffer
    et al.
    Linköpings universitet, Institutionen för systemteknik.
    Jones, Fredrik
    Linköpings universitet, Institutionen för systemteknik.
    Diesel Combustion Modeling and Simulation for Torque Estimation and Parameter Optimization2008Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The current interest regarding how to stop the global warming has put focus on the automobile industry and forced them to produce vehicles/engines that are more environmental friendly. This has led to the development of increasingly complex controlsystem of the engines. The introduction of common-rail systems in regular automotives increased the demand of physical models that in an accurate way can describe the complex cycle within the combustion chamber. With these models implemented it is possible to test new strategies on engine steering in a cost- and time efficient way.

    The main purpose with this report is to, build our own model based on the existing theoretical models in diesel engine combustion. The model has then been evaluated in a simulation environment using Matlab/Simulink. The model that has been implemented is a multi-zone type and is able to handle multiple injections.

    The model that this thesis results in can in a good way predict both pressure and torque generated in the cylinder. More investigation in how the parameter settings behave in other work-points must be done to enhance the models accuracy. There is also some work left to do in the validation of the model but to make this possible more experimental data must be accessible.

  • 202.
    Johansson, Anja
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Medie- och Informationsteknik. Linköpings universitet, Tekniska högskolan.
    Dell’Acqua, Pierangelo
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Medie- och Informationsteknik. Linköpings universitet, Tekniska högskolan.
    Comparing Behavior Trees and Emotional Behavior Networks for NPCs2012Inngår i: 2012 17th International Conference on Computer Games (CGAMES) / [ed] Mehdi, Q; Elmaghraby, A; Marshall, I; Moreton, R; Ragade, R; Zapirain, BG; Chariker, J; ElSaid, M; Yampolskiy, R; Zhigiang, NL, IEEE, 2012, s. 253-260Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Behavior trees have become increasingly popular as an action selection mechanism for non-player characters in games. A different approach to the action selection problem is represented by emotional behavior networks. They are a dynamic, goal-driven decision-making model, which focuses on using emotions for decision making, incorporating various psychological theories concerning emotions. In this paper, we compare behavior trees to emotional behavior networks from a design and functionality point of view.

  • 203.
    Johansson, Björn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, VITS - Laboratoriet för verksamhetsinriktad systemutveckling. Linköpings universitet, Filosofiska fakulteten.
    Deciding on Sourcing Option for Hosting of Software Applications in Organisations2007Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    Software applications are of great importance in organisations, and performance of an organisation depends on how hosting of software applications are organised. This thesis deals with the question: Why and how organisations decide on specific sourcing options for software applications hosting. The thesis describes and explains sourcing decision-making processes made in the Swedish Post (MeLo) and Jönköpings Kommun (the municipality). MeLo’s sourcing decision resulted in outsourcing of hosting, and the municipality’s sourcing decision resulted in internal sourcing of hosting. Both organisations were distinguished by a decentralised structure to a great extent and showed a huge diversity in software applications used. The sourcing decisions resulted in a change to a more centralised hosting of software applications. The thesis is a retrospective case study based on semi-structured interviews and documents analysis. Concepts from the resource-based view and factors described in sourcing literature are used to analyse these sourcing decisions. From nine theoretical initial propositions 28 propositions are developed about why and how sourcing decisions are made. From these propositions, relations are described and some conclusions are presented about why and how sourcing decisions are made. The main conclusion is that maturity level regarding software applications usage seems to influences the start, the process as such, and the outcome of a sourcing decision-making process. This is explained as the more mature the organisation is regarding usage of software applications the more proactive decision-makers are in the sourcing decision. It is also identified that involved factors can be either influencing or justifying, and it is found that control of software applications usage influences the start of a sourcing decision to a high extent. The findings suggest that a sourcing decision-making process can be described as an irrational decision process that aims at increasing commitment on an already made decision. The study suggests that the less mature and more decentralised the organisation is the more reactive and the stronger influence the need to increase control over software applications have in a sourcing decision-making process.

  • 204.
    Johansson, Björn
    et al.
    Copenhagen Business School, Center for Applied ICT.
    Melin, Ulf
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, VITS - Laboratoriet för verksamhetsinriktad systemutveckling. Linköpings universitet, Filosofiska fakulteten.
    Sourcing Decisions of Software Applications Hosting: What Influence has e-Government Services2009Inngår i: Information Systems Development: Challenges in Practice, Theory, and Education Volume 1, Springer US , 2009, 1, s. 393-404Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    There are a lot of reasons reported for why organisations start a sourcing decision. This chapter discusses this theme based on two questions: Does the need and/or wish to increase e-Government services influence the start of a sourcing decision process aiming at reorganising hosting of software applications and if it does, how does it influence the start of such a decision-making process? The point of departure, besides a literature review, is a sourcing decision-making process in a Swedish municipality. When analysing the sourcing decision, five suggested propositions developed from the factors, control, core competence, capability, cost, and strategy, are used. It is concluded that municipalities in Sweden has to prepare for being more of an e-Government organisation, which means that more of the services the municipalities' employees has done before citizens will do by themselves. This demands that to be able to offer future e-Government services municipalities need to have control over software applications. From this study it is suggested that centralisation of hosting can be seen as decentralisation of work tasks from an e-Government perspective.

  • 205.
    Johansson, Britt-Marie
    et al.
    Internationella handelshögskolan i Jönköping.
    Axelsson, Karin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling.
    Communication Media in Distance Selling: Business Interactions in a B2C Setting2004Konferansepaper (Fagfellevurdert)
  • 206.
    Johansson, Hanna
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik.
    Interdisciplinary Requirement Engineering for Hardware and Software Development: from a Hardware Development Perspective2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Complexity in products is increasing, and still there is lack of a shared design language ininterdisciplinary development projects. The research questions of the thesis concern differencesand similarities in requirement handling, and integration, current and future. Futureintegration is given more focus with a pair of research questions highlighting obstacles andenablers for increased integration. Interviews were performed at four different companieswith complex development environments whose products originated from different fields;hardware, software, and service. Main conclusions of the thesis are: Time-frames in different development processes are very different and hard to unite. Internal standards exist for overall processes, documentation, and modification handling. Traceability is poorly covered in theory whilst being a big issue in companies. Companies understand that balancing and compromising of requirements is critical fora successful final product. The view on future increased interdisciplinary development is that there are more obstaclesto overcome than enablers supporting it. Dependency is seen as an obstacle inthis regard and certain companies strive to decrease it.The thesis has resulted in general conclusions and further studies is suggested into morespecific areas such as requirement handling tools, requirement types, and traceability.

  • 207.
    Johansson, Jenny
    et al.
    Linköpings universitet, Institutionen för systemteknik.
    Waller, Mikaela
    Linköpings universitet, Institutionen för systemteknik.
    Control Oriented Modeling of the Dynamics in a Catalytic Converter2005Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Avgasmängden som bensindrivna fordon tillåts släppa ut minskas hela tiden. Ett sätt att möta framtida krav, är att förbättra katalysatorns effektivitet. För att göra detta kan luft-bränsle-förhållandet regleras med avseende på syrelagringen i katalysatorn, istället för som idag, reglera mot stökiometriskt blandningsförhållande. Eftersom syrelagringen inte går att mäta med en givare behövs en modell som beskriver katalysatorns dynamiska egenskaper. Tre sådana modeller har undersökts, utvärderats och jämförts.

    Två av modellerna har implementerats i Matlab/Simulink och anpassats till mätningar från en experimentuppställning. För att kunna observera syrelagringen online valdes slutligen en av modellerna ut, och implementerades i ett Extended Kalman filter.

    Ytterligare arbete behöver läggas ner på den mest lovande modellen, och detsamma gäller för Kalmanfiltret, men på sikt förväntas resultaten kunna bli bra.

  • 208.
    Johansson, Jimmy
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Medie- och Informationsteknik. Linköpings universitet, Tekniska högskolan.
    Navarra, Carlo
    Linköpings universitet, Institutionen för tema, Tema Miljöförändring. Linköpings universitet, Filosofiska fakulteten.
    Neset, Tina
    Linköpings universitet, Institutionen för tema, Tema Miljöförändring. Linköpings universitet, Filosofiska fakulteten.
    Erik, Glaas
    Tomasz, Opach
    Norwegian University of Science and Technology.
    Linnér, Björn-Ola
    Linköpings universitet, Institutionen för tema, Tema Miljöförändring. Linköpings universitet, Filosofiska fakulteten.
    VisAdapt—Increasing Nordic Houseowners' Adaptive Capacity to Climate Change2004Konferansepaper (Fagfellevurdert)
  • 209.
    Johansson, Robert Bo
    Linköpings universitet, Institutionen för datavetenskap.
    Design and implementation of a prototype home media system for an IP-based settop box2004Independent thesis Basic level (professional degree)Oppgave
    Abstract [en]

    This thesis covers design and implementation of a media system solution for home networks with personal computers and a set-top box.

    In a home there are effectively two independent media systems with the same purpose: the personal computer and the digital set-top box, with the purpose of delivering digital media in form of audio and video to the consumer.

    The goal of the thesis work was to implement a solution that bridges the gap between the two systems, so that the user, from the set-top box, can play back media that is actually stored on one or several personal computers.

    Our solution is based on UPnP technology, which is used for service discovery and control. The choice of UPnP is motivated by an evaluation of discovery protocols, which concludes that UPnP is the most suitable technology in this particular system. Also, an evaluation of suitable transport protocols was done. Here,HTTP was used.

    For the personal computer, a media server and a graphical user interface for configuring the media server were created. For the set-top box, a media client, and a graphical user interface for browsing the content of the media server, were created. In conclusion, the creation of the prototype was successful and the set-top box was able to playback media that had been shared by the PC on the network.

  • 210.
    Johansson, Viktor
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Ekström, Sebastian
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    En webbplats för alla – problem och utmaningar: En fallstudie om hur en myndighet arbetar med tillgänglighet på webben och vilka problem och utmaningar det kan innebära2015Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Tillgänglighet på webben är ett fenomen som blivit allt mer uppmärksammat på senare tid, i synnerhet för myndigheter, i och med nya lagar och internationella standarder. Begreppet innebär att personer med funktionsnedsättningar ska kunna uppfatta, förstå, navigera och interagera med webben. Resultatet av denna studie visar dock på att även språk kan ses som en del av arbetet med tillgänglighet. Den ökade uppmärksamheten till trots har det visat sig att det i dagsläget finns många webbplatser med bristande tillgänglighet. Vissa av dessa brister går att koppla till hur man arbetar med tillgänglighet och de problem och utmaningar som finns i detta arbete, något som denna studie har syftat att undersöka.

    Studien har genomförts i en kvalitativ och tolkande anda genom en fallstudie på Migrationsverket som är en av 22 så kallade strategiska myndigheter med ett särskilt ansvar i funktionshinderspolitiken. Insamlingen av det empiriska materialet har gjorts med hjälp av sex intervjuer av fem olika respondenter med ett uttalat tillgänglighetsansvar hos fallorganisationen. Det empiriska materialet har sedan jämförts och relaterats till tidigare forskning för att skapa ett trovärdigt resultat och för att möjliggöra generella slutsatser.

    Resultatet av studien visar att riktlinjer, användarinvolvering och tekniska hjälpmedel är vanliga komponenter i arbetet med tillgänglighet och att språk bör inkluderas som en del av tillgänglighet. Studien redogör även för att myndigheter kan ställas inför problem och utmaningar i tillgänglighetsarbetet i form av bristande attityd, bristande kompetens, bristande stöd från ledningen, otillräckliga verktyg, otillräckliga standardriktlinjer, komplicerad användarinvolvering, offentlig upphandling samt föråldrade system. 

  • 211.
    Jonas, Susanne
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Automatic Status Logger For a Gas Turbine2007Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The Company Siemens Industrial Turbo Machinery AB manufactures and launches in operation among other things gas turbines, steam turbines, compressors, turn-key power plants and carries out service for components for heat and power production. Siemens also performs research and development, marketing, sales and installations of turbines and completes power plants, service and refurbish.

    Our thesis for the engineering degree is to develop an automatic status log which will be used as a tool to control how the status of the machine is before and after technical service at gas turbines. Operational disturbances will be registered in a structured way in order to get a good possibility to follow up the reliability of the application.

    An automatic log function has been developed and will be activated at start, stop and shutdown of the turbine system. Log files are created automatically and get a name with the event type, the date and the time. The files contain data as timestamp, name, measured values and units of the signals which are going to be analyzed by the support engineers. They can evaluate the cause of the problem using the log files.

  • 212.
    Joona, Jukka
    Linköpings universitet, Institutionen för tema, Tema Kommunikation.
    Intranätets betydelse för användarna i ett landsting2005Independent thesis Advanced level (degree of Magister), 10 poäng / 15 hpOppgave
    Abstract [en]

    The aim with this independent degree project of master thesis is to find what the user opinions of the intranet in a county council is. The paper seeks how the question about how the culture in the organisation was affected by the use of the intranet. An important part is to explore the expectations and acceptance of the intranet and get a picture of which functions and services support day-to-day work with good quality. One goal is to find out how the intranet users feel that the communication, information and usability can be developed.

    The focus group interview is a qualitative method that has been applied for gathering data from the respondents, who participate in the investigation from the county council. The used method is unstructured focus groups containing the three dominating categories of staff in the county council. Totally five focus groups have been interviewed.

    In the result and the following analysis of data from the focus group interviews have a few main categories been chosen for the survey. One of the categories is the information- and communication flows in the intranet, which include how it works today and could be improved. Other parts in the analysis are usability, organisation culture and the potential for the intranet as a tool for the organisation.

    A number of conclusions are drawn from the survey and the analysis. One conclusion is that the intranet is a well-accepted channel for information, but underestimated as a communication channel. Another conclusion is that the respondents considered that an intranet has to be fun, exciting, and contain interesting material; which will lead to that the intranet will be used more. The content has to be updated and suited for the needs of the organisation.

  • 213.
    Kagerin, Anders
    et al.
    Linköpings universitet, Institutionen för systemteknik.
    Karlsson, Michael
    Linköpings universitet, Institutionen för systemteknik.
    Development of a low power hand-held device in a low budget manner2006Independent thesis Advanced level (degree of Magister), 20 poäng / 30 hpOppgave
    Abstract [en]

    The market of portable digital audio players (DAPs) have literally exploded the last couple of years. Other markets has grown as well. PDAs, GPS receivers, mobile phones, and so on. This resulted in more advanced ICs and SoCs becoming publically available, eliminating the need for in-house ASICs, thus enableing smaller actors to enter the markets.

    This thesis explores the possibilities of developing a low power, hand-held device on a very limited budget and strict time scale.

    This thesis report also covers all the steps taken in the development procedure.

  • 214.
    Karlsson, Andreas
    Linköpings universitet, Institutionen för datavetenskap.
    Kartering med autonomt fordon2006Independent thesis Advanced level (degree of Magister), 20 poäng / 30 hpOppgave
    Abstract [sv]

    För att mobila robotar skall kunna arbeta strukturerat krävs det att de har kännedom om hur omgivningen ser ut. Omgivningen kan antingen vara förprogrammerad eller så görs roboten självlärande. På Saab Bofors Dynamics i Linköping arbetas det med en mobil testplattform kallad Freke, som används för att bland annat utveckla och utvärdera navigeringslösningar. Intresse fanns för att vidareutveckla plattformen och få den att klara arbeta i okända miljöer. Ett första steg mot detta mål var att få systemet att kunna rita upp en egen karta utan tidigare kännedom om dess omgivningar.

    Uppgiften för det här examensarbetet blev därför att utveckla och implementera ett autonomt system som klarar att navigera och utforska en begränsad omgivning samt att rita upp en karta över densamma. Under litteraturstudien hittades inte någon färdig lösning som gick att applicera på den givna plattformen. Lösningen på uppgiften blev istället att utveckla ett eget system, direkt anpassat för den aktuella plattformen. Hela systemet utvecklades från grunden och implementerades till en praktiskt fungerande lösning.

    Plattformen som används består av ett fordonschassi med tre hjul, varav två är drivande och utrustade med pulsgivare som används för att beräkna hur fordonet kör. Plattformen är även utrustad med ultraljudssensorer för att kunna mäta avstånd till närliggande hinder och väggar runt fordonet. Navigeringen sker genom att fordonet följer väggar och detekterar korsningar och öppningar som det senare kan återvända till och utforska vidare. Resultatet av karteringen genereras som en png-bild.

    Med den begränsade hårdvara som fanns att tillgå hölls förväntningarna på arbetet relativt låga med ett mål att få fram en tolkningsbar karta. Resultatet blev långt över förväntan med tydliga skalenliga kartor som visar detaljer som ingen trodde skulle synas i resultatet.

  • 215.
    Karlsson, Daniel
    et al.
    Linköpings universitet, Institutionen för medicinsk teknik, Medicinsk informatik. Linköpings universitet, Tekniska fakulteten.
    Gøeg, Kirstine Rosenbeck
    Department of Health Science and Technology, Aalborg University.
    Örman, Håkan
    Linköpings universitet, Institutionen för medicinsk teknik, Medicinsk informatik. Linköpings universitet, Tekniska fakulteten.
    Højen, Anne Randorff
    Department of Health Science and Technology, Aalborg University.
    Semantic Krippendorff’s α for measuring inter-rater agreement in SNOMED CT coding studies2014Inngår i: e-Health – For Continuity of Care / [ed] Christian Lovis, et al., Amsterdam, 2014, s. 151-155Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Semantic interoperability requires consistency in use of terminologies such as SNOMED CT. Inter-rater agreement measurement can be used to quantify this consistency among terminology users. Increasingly, studies of SNOMED CT include inter-rater agreement measures. However, published studies do not consider distance between concepts when calculating the inter-rater agreement measures. In this paper we propose a semantic inter-rater agreement measure for use with SNOMED CT encoded data. A semantic Krippendorff's α measure is implemented using a path-length based difference function. The measure is tested using three different datasets. Results show that the proposed semantic measure is sensitive to seriousness of coding differences whereas a nominal measure is not. The proposed measure reflects the intuition that distance matters when comparing uses of SNOMED CT.

  • 216.
    Karlsson, Fredrik
    et al.
    Örebro University, Sweden.
    Hedström, Karin
    Örebro University, Sweden.
    Goldkuhl, Göran
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Practice-based discourse analysis of information security policies2017Inngår i: Computers & security (Print), ISSN 0167-4048, E-ISSN 1872-6208, Vol. 67, s. 267-279Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    To address the "insider" threat to information and information systems, an information security policy is frequently recommended as an organisational measure. However, having a policy in place does not necessarily guarantee information security. Employees poor compliance with information security policies is a perennial problem for many organisations. It has been shown that approximately half of all security breaches caused by insiders are accidental, which means that one can question the usefulness of current information security policies. We therefore propose eight tentative quality criteria in order to support the formulation of information security policies that are practical from the employees perspective. These criteria have been developed using practice-based discourse analysis on three information security policy documents from a health care organisation. (C) 2016 Elsevier Ltd. All rights reserved.

  • 217.
    Karlsson, Henrik
    et al.
    Linköpings universitet, Institutionen för datavetenskap. Linköpings universitet, Tekniska högskolan.
    Olsson, Mattias
    Linköpings universitet, Institutionen för datavetenskap. Linköpings universitet, Tekniska högskolan.
    I Microsoft Dynamics AX – databasaccess, kommunikation och tjänster för Commerce Runtime2013Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Examensarbetet undersöker den nya versionen av affärssystemet Microsoft Dynamics AX R2 2012 och dess plattform Commerce Runtime och analyserar dessa ur perspektiven arkitektur och kommunikationsmöjligheter. Examensarbetet undersöker systemets arkitektur och implementerar tre metoder för att visa upp kommunikationen mellan komponenterna i systemet. Undersökningen avgränsar sig dock till de områden av systemet och plattformen som har med butikslösningen att göra. Undersökningen går hand i hand med implementationen. Implementeringen sker löpande under arbetet för att säkerställa att undersökningen stämmer. Rapporten beskriver tre olika kommunikationsmetoder. Synch Service synkroniserar Dynamics AX databas med Commerce Runtime databas med hjälp av Dynamics AX användargränssnitt. SQL-adapter används för att hämta den synkroniserade datan i Commerce Runtime databas. Real-Time Service anropar exponerade metoder i Dynamics AX från en extern klient. Utifrån utvärderingen så lämpar sig Synch Service bra till när mycket information ska uppdateras rutinmässigt. Real-Time Service lämpar sig när data ska hanteras på ett antal bestämda sätt och då beräkningar av data ska genomföras och lämna tillbaka ett svar som genererats dynamiskt.

  • 218.
    Karlsson, Jonathan
    Linköpings universitet, Institutionen för datavetenskap, Interaktiva och kognitiva system. Linköpings universitet, Filosofiska fakulteten.
    Läkemedelshantering: En teoretisk studie i hur man kan minska antalet felmedicineringar i Sverige2012Independent thesis Basic level (degree of Bachelor), 12 poäng / 18 hpOppgave
    Abstract [sv]

    Denna uppsats är en studie i hur man hanterar läkemedel på en klinik på ett sjukhus i Sverige. Målet är att se vilka åtgärder som skulle kunna appliceras för att få en säkrare vård genom att försöka minska antalet felmedicineringar. Studien gjordes genom observationer och samtal med anställda på kliniken, samt att relevanta teorier hittades, vilket gjorde att en del förbättringsförslag och idéer till vidare forskning lades fram. Resultaten är till exempel hur man skulle kunna minska antalet felmedicineringar genom att ta bort ett antal säkerhetsåtgärder. Detta anses kunna göras genom att flytta runt läkemedel i läkemedelsförråden utan att förvarna personalen (förutsatt att personalen vet att det kan hända utan förvarning innan det nya systemet används). Att göra på det viset skulle i teorin innebära att sjuksköterskorna skulle behöva vara mer uppmärksamma i mycket högre grad än förut eftersom läkemedel inte längre står där det brukar stå. Ytterligare resultat är till exempel hur läkemedelsföretagen skulle kunna illustrera ett läkemedels styrka genom färgkoder på kartonger och pillerkartor eftersom det inte finns någon nationell standard för det idag, vilket ha lett till att alla företag har sitt eget sätt att illustrera detta på, om de har något alls. Även mer specifika resultat som eventuellt endast kan appliceras på ett mindre antal kliniker och avdelningar har lagts fram. 

  • 219.
    Karlsson, Karl
    Linköpings universitet, Institutionen för systemteknik.
    Validation of Bus Specific Powertrain Components in STARS2007Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The possibilities to simulate fuel consumption and optimize a vehicle's powertrain to fit to the customer's needs are great strengths in the competitive bus industry where fuel consumption is one of the main sales arguments. In this master's thesis, bus specific powertrain component models, used to simulate and predict fuel consumption, are validated using measured data collected from buses.

    Additionally, a sensitivity analysis is made where it is investigated how errors in the powertrain parameters affect fuel consumption. After model improvements it is concluded that the library components can be used to predict fuel consumption well.

    During the work, possible model uncertainties which affect fuel consumption are identified. Hence, this study may serve as foundation for further investigation of these uncertainties.

  • 220.
    Keller, Christina
    Linköpings universitet, Institutionen för datavetenskap, EISLAB - Economic Information Systems. Linköpings universitet, Tekniska högskolan.
    Virtual Learning Environments in Higher Education: A Study of User Acceptance2007Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The aim of the thesis was to create knowledge about factors influencing acceptance of virtual learning environments among academic staff and students in blended learning environments. The aim was operationalised by four research questions. To answer the research questions, several studies were performed applying the methods of survey study, conceptual-analytical research, a qualitative meta-analysis combined with a single case study and a comparative, explanatory case study. The empirical studies were performed at five universities in Sweden, Norway and Lithuania. In the thesis, a technology acceptance perspective extended with the perspectives of organisational learning and diffusion of innovations was used. The findings indicated that the contextual factor of culture was powerful in influencing acceptance of virtual learning environments, positively as well as negatively. High degrees of performance expectancy, results demonstrability and social influence affected acceptance of virtual learning environments positively. The degree of social influence was hypothesised to be mediated by the contextual factor of culture. The organisational culture of universities, expressed as shared values of what is good quality teaching and learning, were found to partly oppose values inherent in the virtual learning environments. The factor of students’ learning styles did not have any impact on acceptance of virtual learning environments. The original version of the technology acceptance model was found to be insufficient in explaining differences in acceptance of virtual learning environments. In the conclusions of the thesis, a descriptive and explanatory model of virtual learning environments acceptance among academic staff and students in blended learning environments is presented applying the combined perspectives of organisational learning, technology acceptance and diffusion of innovations. Implications for practice are put forward, emphasizing culture as an important factor to consider in the implementation of virtual learning environments.

    Delarbeid
    1. Students’ Perceptions of E-learning in University Education
    Åpne denne publikasjonen i ny fane eller vindu >>Students’ Perceptions of E-learning in University Education
    2002 (engelsk)Inngår i: Learning, Media and Technology, ISSN 1743-9884, Vol. 27, nr 1-2, s. 55-67Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    This paper examines students’ perceptions of e‐learning taking students at Jönköping University in Sweden as an example. The students had experiences from two years of e‐learning on campus. Students (n = 150) filled in a questionnaire with closed as well as open‐ended questions. The answers were analysed in a multiple regression analysis, putting the students’ perceptions in relation to gender, age, previous knowledge of computers, attitudes to new technology, learning styles and the way of implementing e‐learning at the university. Advantages and disadvantages of e‐leaming were categorized in a qualitative content analysis. The main conclusion from the study was that the strategy of implementing the e‐leaming system at the university was more important in influencing students’ perceptions than the individual background variables. Students did not regard access to e‐learning on campus as a benefit. Male students, students with previous knowledge of computers and students with positive attitudes to new technologies were all less positive to e‐leaming on campus than other students.

    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14634 (URN)10.1080/1358165020270105 (DOI)
    Tilgjengelig fra: 2007-09-21 Laget: 2007-09-21 Sist oppdatert: 2013-11-19
    2. Virtual Learning Environments: Three Implementation Perspectives
    Åpne denne publikasjonen i ny fane eller vindu >>Virtual Learning Environments: Three Implementation Perspectives
    2005 (engelsk)Inngår i: Learning, Media and Technology, ISSN 1743-9884, Vol. 30, nr 3, s. 299-311Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Universities worldwide offer web-based courses distributed by virtual learning environments (VLEs). A common theoretical framework for implementing VLEs is the pedagogical perspective of instructional design. In this paper, three perspectives of implementation from information systems implementation research and organization theory are presented: implementation as technology acceptance, implementation as diffusion of innovations and implementation as a learning process. These perspectives focus on the VLE as an information system within an organization, the university. The models reviewed offer an important complementary perspective to the pedagogical view of instructional design. The three implementation perspectives are compared and a conclusion is made concerning their implications of successful use and implementation of VLEs.

    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14635 (URN)10.1080/17439880500250527 (DOI)
    Tilgjengelig fra: 2007-09-21 Laget: 2007-09-21 Sist oppdatert: 2013-11-19
    3. Do Learning Styles Matter in Online Education?
    Åpne denne publikasjonen i ny fane eller vindu >>Do Learning Styles Matter in Online Education?
    2007 (engelsk)Inngår i: Principles of Effective Online Learning, (Ed. Nicole Antoinette Buzzetto-More), Santa Rosa, California, USA: Informing Science , 2007, s. 121-135Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    By providing a holistic overview of the theories, constructs, strategies, and decisions that affect e-learning enhanced by practical and easy to understand real word examples readers from beginning to intemediate levels will learn and be able to select from a variety of approaches in order to rethink and modify teaching practices in order to become more effective educators.

    sted, utgiver, år, opplag, sider
    Santa Rosa, California, USA: Informing Science, 2007
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14636 (URN)1-932886-01-X (ISBN)978-1-932886-01-6 (ISBN)
    Tilgjengelig fra: 2007-09-21 Laget: 2007-09-21 Sist oppdatert: 2018-01-13bibliografisk kontrollert
    4. Technology Acceptance in Academic Organisations: Implementation of Virtual Learning Environments
    Åpne denne publikasjonen i ny fane eller vindu >>Technology Acceptance in Academic Organisations: Implementation of Virtual Learning Environments
    2006 (engelsk)Inngår i: In Proceedings of the 14th European Conference on Information Systems, Gothenburg, Sweden., 2006Konferansepaper, Publicerat paper (Annet vitenskapelig)
    Abstract [en]

    This paper presents findings from an ongoing cross-cultural study exploring implementation of VirtualLearning Environments (VLEs) in higher education. Semi-structured interviews were made with keypersonnel at three university departments providing public health education in Lithuania, Norway andSweden during 2004-2005. Technology acceptance in the context of the innovation decision processwas focused during the interviews. The data was analyzed from the perspectives of innovationdiffusion theory and Unified Theory of Acceptance and Use of Technology (UTAUT). Findings giveevidence that a high degree of performance expectancy among university staff seems to enhance theimplementation process. Factors found to obstruct the implementation process were: 1) the concept of“academic freedom” put forward as an argument for not using educational technology, and 2) anorganisational culture depicting teaching on campus as the ideal pedagogical approach.

    Emneord
    Technology Acceptance, Unified Theory of Acceptance and Use of Technology, Diffusion of innovations, Virtual Learning Environment
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14637 (URN)
    Tilgjengelig fra: 2007-09-21 Laget: 2007-09-21
    5. Students’ Acceptance of E-learning Virtual Learning Environments
    Åpne denne publikasjonen i ny fane eller vindu >>Students’ Acceptance of E-learning Virtual Learning Environments
    2007 (engelsk)Inngår i: Proceedings of the 15th European Conference on Information Systems, St. Gallen, Switzerland, 2007, s. 395-406Konferansepaper, Publicerat paper (Annet vitenskapelig)
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14638 (URN)
    Tilgjengelig fra: 2007-09-21 Laget: 2007-09-21 Sist oppdatert: 2018-01-13
    6. User Acceptance of Virtual Learning Environments: A Case Study from Three Northern European Universities
    Åpne denne publikasjonen i ny fane eller vindu >>User Acceptance of Virtual Learning Environments: A Case Study from Three Northern European Universities
    2007 (engelsk)Artikkel i tidsskrift (Fagfellevurdert) Submitted
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14639 (URN)
    Tilgjengelig fra: 2007-09-21 Laget: 2007-09-21
  • 221.
    Keller, Christina
    et al.
    Linköpings universitet, Institutionen för datavetenskap, EISLAB - Economic Information Systems. Linköpings universitet, Tekniska högskolan.
    Hrastinski, Stefan
    Do Learning Styles Matter in Online Education?2007Inngår i: Principles of Effective Online Learning, (Ed. Nicole Antoinette Buzzetto-More), Santa Rosa, California, USA: Informing Science , 2007, s. 121-135Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    By providing a holistic overview of the theories, constructs, strategies, and decisions that affect e-learning enhanced by practical and easy to understand real word examples readers from beginning to intemediate levels will learn and be able to select from a variety of approaches in order to rethink and modify teaching practices in order to become more effective educators.

  • 222.
    Keller, Christina
    et al.
    Linköpings universitet, Institutionen för datavetenskap, EISLAB - Economic Information Systems. Linköpings universitet, Tekniska högskolan.
    Hrastinski, Stefan
    Carlsson, S. A.
    Students’ Acceptance of E-learning Virtual Learning Environments2007Inngår i: Proceedings of the 15th European Conference on Information Systems, St. Gallen, Switzerland, 2007, s. 395-406Konferansepaper (Annet vitenskapelig)
  • 223.
    Klein, Markus
    Linköpings universitet, Institutionen för systemteknik. Linköpings universitet, Tekniska högskolan.
    Single-Zone Cylinder Pressure Modeling and Estimation for Heat Release Analysis of SI Engines2007Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    Cylinder pressure modeling and heat release analysis are today important and standard tools for engineers and researchers, when developing and tuning new engines. Being able to accurately model and extract information from the cylinder pressure is important for the interpretation and validity of the result.

    The first part of the thesis treats single-zone cylinder pressure modeling, where the specific heat ratio model constitutes a key part. This model component is therefore investigated more thoroughly. For the purpose of reference, the specific heat ratio is calculated for burned and unburned gases, assuming that the unburned mixture is frozen and that the burned mixture is at chemical equilibrium. Use of the reference model in heat release analysis is too time consuming and therefore a set of simpler models, both existing and newly developed, are compared to the reference model.

    A two-zone mean temperature model and the Vibe function are used to parameterize the mass fraction burned. The mass fraction burned is used to interpolate the specific heats for the unburned and burned mixture, and to form the specific heat ratio, which renders a cylinder pressure modeling error in the same order as the measurement noise, and fifteen times smaller than the model originally suggested in Gatowski et al. (1984). The computational time is increased with 40 % compared to the original setting, but reduced by a factor 70 compared to precomputed tables from the full equilibrium program. The specific heats for the unburned mixture are captured within 0.2 % by linear functions, and the specific heats for the burned mixture are captured within 1 % by higher-order polynomials for the major operating range of a spark ignited (SI) engine.

    In the second part, four methods for compression ratio estimation based on cylinder pressure traces are developed and evaluated for both simulated and experimental cycles. Three methods rely upon a model of polytropic compression for the cylinder pressure. It is shown that they give a good estimate of the compression ratio at low compression ratios, although the estimates are biased. A method based on a variable projection algorithm with a logarithmic norm of the cylinder pressure yields the smallest confidence intervals and shortest computational time for these three methods. This method is recommended when computational time is an important issue. The polytropic pressure model lacks information about heat transfer and therefore the estimation bias increases with the compression ratio.

    The fourth method includes heat transfer, crevice effects, and a commonly used heat release model for firing cycles. This method estimates the compression ratio more accurately in terms of bias and variance. The method is more computationally demanding and thus recommended when estimation accuracy is the most important property. In order to estimate the compression ratio as accurately as possible, motored cycles with as high initial pressure as possible should be used.

    The objective in part 3 is to develop an estimation tool for heat release analysis that is accurate, systematic and efficient. Two methods that incorporate prior knowledge of the parameter nominal value and uncertainty in a systematic manner are presented and evaluated. Method 1 is based on using a singular value decomposition of the estimated hessian, to reduce the number of estimated parameters one-by-one. Then the suggested number of parameters to use is found as the one minimizing the Akaike final prediction error. Method 2 uses a regularization technique to include the prior knowledge in the criterion function.

    Method 2 gives more accurate estimates than method 1. For method 2, prior knowledge with individually set parameter uncertainties yields more accurate and robust estimates. Once a choice of parameter uncertainty has been done, no user interaction is needed. Method 2 is then formulated for three different versions, which differ in how they determine how strong the regularization should be. The quickest version is based on ad-hoc tuning and should be used when computational time is important. Another version is more accurate and flexible to changing operating conditions, but is more computationally demanding.

  • 224.
    Konradsson, Alexander
    Linköpings universitet, Institutionen för systemteknik.
    Modellering och reglering av ureainsprutning på kraftvärmeverket FTG2006Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The aim of this thesis is to improve the control of urea injection at the combined power and heating plant Framtidens Gärstad (FTG). Tekniska Verken i Linköping AB is the owner of the plant.

    The FTG plant consists of a boiler where garbage combustion is done. From the combustion nitrogen oxides are emitted. These nitrogen oxides are hazardous to the environment. To reduce the nitrogen oxides, injection of urea into the boiler is used. Urea is an organic compound of carbon, nitrogen, oxygen and hydrogen. When urea reacts with nitrogen oxides they transform into harmless nitrogen gas and water. In the plant the urea is injected by six lances.

    The control of the urea injection at FTG could be improved which would save some money for the company. This is the main reason for the aim of this thesis. It is the control of the total flow of urea to the lances that is studied in this work.

    Some literature about reduction of nitrogen oxides is studied, especially reduction using urea injection. There are a lot of factors that affect how good the reduction becomes. The most important factors are the amount of urea being used and the temperature of the flue gases where the reaction with urea takes place. A model with these two factors as inputs and the content of nitrogen oxides as output is derived. This is done with experiments in the boiler and system identification. The system is modelled as a linear system.

    The proposal about the improved control uses the temperature from a temperature measurement just below the urea injection in the boiler. This is a parameter that the existing control does not use. The temperature is divided into three intervals. For each interval different parameters for the function of the system and the nitrogen oxide controller are used. The nitrogen oxide controller in the proposed control is derived with help from a new method of controldesign called AMIGO.

    The identification models gave good results in two of the temperature intervals. The result for the third interval was not so good. This is probably due to lack of good data.

    The proposed control structure could for practical reasons not be tested online but preliminary tests using measurement data gave qualitatively reasonable results.

    In order to improve the results temperature dependence has to be treated more systematically.

  • 225.
    Krumsvik, Ole Andreas
    et al.
    Univ Bergen, Norway.
    Babic, Ankica
    Linköpings universitet, Institutionen för medicinsk teknik, Avdelningen för medicinsk teknik. Linköpings universitet, Tekniska fakulteten. Univ Bergen, Norway.
    Mugisha, Alice
    Univ Bergen, Norway.
    Design Reflection on Mobile Electronic Data Capturing Forms in African Rural Settings2019Inngår i: WORLD CONGRESS ON MEDICAL PHYSICS AND BIOMEDICAL ENGINEERING 2018, VOL 1, SPRINGER , 2019, Vol. 68, nr 1, s. 347-350Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents a literature review of the existing tools for data capture in African rural settings. The objective has been to investigate and understand design approaches, usability, user satisfaction, as well as feasibility of capturing data using mobile device forms. Existing open source solutions are most commonly used in a variety of applications such as maternal care, new born child health, and routine health care monitoring. The common design issues involve customizing forms for the intended purpose and for semi- or non-literate user groups. User evaluation is also not often reported, however some of the studies suggest a high satisfaction as compared to the traditional paper-based approach. Typical barriers include: cost, user input, user motivation, limited graphical user interface, and availability of technology in rural areas. Some of these barriers could be addressed by practicing User-Centered Design. We suggest including all future user groups in the development of mobile electronic data capturing forms to increase usability, data accuracy, and the user satisfaction.

  • 226.
    Krumsvik, Ole Andreas
    et al.
    Univ Bergen, Norway.
    Babic, Ankica
    Linköpings universitet, Institutionen för medicinsk teknik, Avdelningen för medicinsk teknik. Linköpings universitet, Tekniska fakulteten. Univ Bergen, Norway.
    Mugisha, Alice
    Univ Bergen, Norway.
    Design Variations for Improved Usability of Mobile Data Capture in Rural Uganda2019Inngår i: WORLD CONGRESS ON MEDICAL PHYSICS AND BIOMEDICAL ENGINEERING 2018, VOL 1, SPRINGER , 2019, Vol. 68, nr 1, s. 439-443Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Several form design alternatives were created as a starting point for a usability evaluation in a project dedicated to maternal and child care in the rural Northern Ugandan area. The project is concerned with ensuring that pregnant mothers deliver from the hospitals and that their babies receive the necessary care after delivery, despite the limited resources. Health care workers are collecting data to document current resources using their hand-held devices, mainly phones. The basic requirements are that the application design should be simple, easily understandable by a broad user group, and supported by Android mobile platforms. We have created four design alternatives, all simple, straightforward, and suitable for low cost Android mobile devices. The major differences are concerned with the overall layout and color usage. There are variations in the radio buttons, check boxes, date formatting, progress visualization, font, labeling, data input validation, tables, and navigation buttons. The software, Axure RP 8, was used for designing alternatives based on the currently used mobile electronic data capture form "SurvPlus_FirstVisit_4" which is made in ODK Collect and has many usability issues. By coming up with these four mid-fidelity prototypes we expect to address variations in design that the current software allows. Suggested designs are common for many other applications, the majority of which mobile device users are familiar with. User preference testing was carried out to explore user preferences regarding the holistic design and particular design features.

  • 227.
    Krysander, Mattias
    Linköpings universitet, Institutionen för systemteknik, Fordonssystem. Linköpings universitet, Tekniska högskolan.
    Design and Analysis of Diagnosis Systems Using Structural Methods2006Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    In complex and automated technological processes the effects of a fault can quickly propagate and lead to degradation of process performance or even worse to a catastrophic failure. This means that faults have to be found as quickly as possible and decisions have to be made to stop the propagation of their effects and to minimize process performance degradation. The behavior of the process is affected in different ways by different faults and the fault can be found by ruling out faults for which the expected behavior of the process is not consistent with the observed behavior. In model-based diagnosis, a model describes the expected behavior of the process for the different faults.

    A device for finding faults is called a diagnosis system. In the diagnosis systems considered here, a number of tests check the consistency of different parts of the model, by using observations of the process. To be able to identify which fault that has occurred, the set of tests that is used must be carefully selected. Furthermore, to reduce the on-line computational cost of running the diagnosis system and to minimize the in general difficult and time-consuming work of tests construction, it is also desirable to use few tests.

    A two step design procedure for construction of a diagnosis systems is proposed and it provides the means for selecting which tests to use implicitly by selecting which parts of the model that should be tested with each test. Then, the test design for each part can be done with any existing technique for model-based diagnosis.

    Two different types of design goals concerning the capability of distinguishing faults is proposed. The first goal is to design a sound and complete diagnosis system, i.e., a diagnosis system with the following property. For any observation, the diagnosis system computes

    exactly the faults that together with the observation are consistent with the model. The second goal is specified by which faults that should be distinguished from other faults, and this is called the desired isolability.

    Given any of these two design goals, theory and algorithms for selecting a minimum cardinality set of parts of the model are presented. Only parts with redundancy can be used for test construction and a key result is that there exists a sound and complete diagnosis system based on the set of all minimal parts with redundancy in the model. In differentialalgebraic models, it is in general difficult to analytically identify parts with redundancy, because it corresponds to variable elimination or projection. It is formally shown that redundant parts can be found by using a structural approach, i.e., to use only which variables that are included in each equation. In the structural approach, parts with more equations than unknowns are identified with efficient graph-theoretical tools. A key contribution is a new algorithm for finding all minimal parts with redundancy of the model. The efficiency of the algorithm is demonstrated on a truck engine model and compared to the computational complexity of previous algorithms.

    In conclusion, tools for test selection have been developed. The selection is based on intuitive requirements such as soundness or isolability requirements specified by the diagnosis system designer. This leads to a more straightforward design of diagnosis systems, valuable engineering time can be saved, and the resulting diagnosis systems use minimum number of tests, i.e., the on-line computational complexity of the resulting diagnosis systems become low.

  • 228.
    Källhammer, Anette
    Linköpings universitet, Institutionen för datavetenskap.
    E-postfrågor till myndighet: Deskriptiv fallstudie av medborgarnas e-postfrågor inkomna till Försäkringskassan och Landstingets Frågelåda2006Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Det blir allt vanligare att samhällsmedborgare kommunicerar med myndigheter via e-post. Med e-post är det möjligt att kontakta myndigheten vilken tid som helst på dygnet, var man än befinner sig, vilket gör att mediet forcerar tid- och rumssbarriären.

    Försäkringskassans telefonkundtjänst i Östergötland tar emot omkring 150 e-postmeddelanden varje dag och potentialen för att effektivisera e-posthanteringen torde vara stor. Till Landstingets i Östergötlands webbtjänst Frågelådan inkommer omkring 2 frågor per dag. Den genomförda studien syftar till att identifiera möjligheter att effektivisera uppgiften att förmedla efterfrågad information till medborgaren med hög kvalitet, exempelvis genom automatisering eller stöd för hantering av e-post. Inkomna e-postmeddelanden har kartlagts för att se vilka frågor det handlar om. Studien har koncentrerats till Försäkringskassan som hade det största antalet förfrågningar. Frågelådan ställs i relation till analysen av Försäkringskassans e-posthantering.

    Avsikten med denna uppsats är att ge en beskrivning av e-postförfrågningar som medborgarna ställer till myndigheten. Syftet är att identifiera möjligheter att effektivisera uppgiften att förmedla efterfrågad information till medborgaren med hög kvalitet. I uppsatsen beskrivs vilka problem frågorna innebär för organisationens medarbetare när de svarar på frågorna. Det skildras även om alla förfrågningar behöver ha ett personligt svar. De svårigheter man ställs inför med tanke på standardisering och automatisering av svaren redogörs också för. Utfallet av denna studie är att det ofta är svårt att lämna ett enkelt svar direkt till medborgaren. Frågorna innehåller ofta personliga uppgifter som måste tas hänsyn till och många gånger behövs kompletterande uppgifter från medborgaren för att lämna ett korrekt svar. I dagsläget har telefonkundtjänsts medarbetare olika sätt att lösa avsaknad av information i e-postmeddelanden. De kan ta ärendet per telefon, svara med villkor eller i e-postsvaret be om kompletterande uppgifter. De olika sätten att svara på dessa meddelanden innebär både för- och nackdelar. För att hantera bristande information i inkommande e-postmeddelanden skulle man i ett första steg kunna inrikta sig på att inhämta nödvändig information från medborgaren för att göra den manuella svarshanteringen effektivare.

  • 229.
    Källkvist, Kurt
    Linköpings universitet, Institutionen för systemteknik, Fordonssystem.
    Fuel Pressure Modelling in a Common-Rail Direct Injection System2011Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The fuel pressure is one of the central control variables of a modern common-rail injection system. It influences the generation of nitrous oxide and particulate matter emissions, the brake specific fuel consumption of the engine and the power consumption of the fuel pump. Accurate control of the fuel pressure and reliable diagnostics of the fuel system are therefore crucial components of the engine management system. In order to develop for example control or diagnostics algorithms and aid in the understanding of how hardware changes affect the system, a simulation model of the system is desirable. 

    A Simulink model of the XPI (Xtra high Pressure Injection) system developed by Scania and Cummins is developed. Unlike the previous models of the system available, the new model is geared towards fast simulations by modelling only the mean flow and pressure characteristics of the system, instead of the momentary flow and pressure variations as the engine rotates. The model is built using a modular approach where each module represents a physical component of the system. The modules themselves are based to a large extent on the physical properties of the components involved, making the model of the system adaptable to different hardware configurations whilst also being easy to understand and modify.

  • 230.
    Lagsten, Jenny
    et al.
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Nordström, Malin
    Health Informatics Centre, Karolinska Institutet, Sweden; Department of Management and Engineering, Linköping University, Sweden .
    Evaluating an IT Governance model-in-use2015Inngår i: Systems, Signs & Actions, ISSN 1652-8719, E-ISSN 1652-8719, Vol. 9, nr 1, s. 93-112Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    IT Governance models represent ideals for how a collection of practices or mechanisms shall enhance the achievement of IT/business alignment in the organisation. In practice IT Govern-ance (ITG) models are interpreted and adapted to get the work done. In this paper we suggest an evaluation method for comparing an ideal ITG model (the model-in-concept) with the cor-responding use of the model in daily operations (the model-in-use). Theoretically we have approached the development of the ITG evaluation method from a deployment perspective meaning that a model first is developed and described by model developers and thereafter interpreted, adapted and used in the organisational context. Further, we have applied the con-cept of model rationale in order to express the logic of the model-in-concept as intended by the model developers. In our action research study we show how we have developed and test-ed the ITG evaluation method as part of an evaluation of the deployment and use of an ITG model in a large healthcare organisation. Our findings suggests that the evaluation method give support for in depth evaluation, dialog and learning concerning the complex logic of an ITG model-in-concept and model-in-use.

  • 231.
    Lagsten, Jenny
    et al.
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Nordström, Malin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Klinisk digital innovation: Från produkttänk, via informationssystem, till innovationsrymd2016Rapport (Annet vitenskapelig)
    Abstract [sv]

    Det pågår en transformation av vården där digitala innovationer ses som centrala möjliggörare. I denna studie preciserar vi ett perspektiv på digital innovation i offentlig vård. Vår första utgångspunkt är definitioner av innovation och innovationstyper i offentlig sektor och vård. Vår andra utgångspunkt är att digitala innovationer representeras av informationssystem, och ett att informationssystem är en sammansatt artefakt som utgörs av en teknisk artefakt, en informationsartefakt och en social artefakt. I rapporten redogör vi för en konceptuell analys som relaterar definierade innovationstyper till den sammansatta artefakten informationssystem. Resultatet av analysen är en konceptuell modell för digital innovation – en innovationsrymd. Innovationsrymden är en modell för att precisera och beskriva grundtanken med en digital innovation utifrån dess ingående dimensioner och den avsiktliga nyttan.

  • 232.
    Lagsten, Jenny
    et al.
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Nordström, Malin
    Linköping University, Linköping, Sweden; Karolinska University Hospital, Solna, Sweden.
    Ekholm, Maria
    Stockholms Läns Landsting, Stockholm, Sweden.
    The eHealth Innovation Staircase2015Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    In this research we contribute with an eHealth Innovation Staircase that represents innovation processes in healthcare based on service-dominant logic as a complement to the traditional goods-dominant logic view on innovation. The eHealth innovation staircase is useful for practice and research to better understand and evaluate innovation processes. Improved understanding will also contribute to better use of opportunities and benefits offered by eHealth innovations in practice.

  • 233.
    Larsson, Björn
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Jonsson, Zandra
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    pm3-revision: En välgrundad metodutveckling av metod för revision av förvaltningsstyrning2013Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In the field of maintenance management there are but a few models an organization can use. The one model that has risen to the status of being the de facto standard in Sweden is pm3(på maintenance management model). The aim of this study is to lay the groundwork for a new method of evaluate the use of pm3within organizations. Today there is no uniform way of performing such an evaluation, which is necessary in order to diagnose the performance of the systems maintenance organizations.In the process of creating our own method for performing this kind of pm3audit, we further developed the ideas from a study by Lagsten & Nordström (2013) that was performed at the county Region Skåne. The authors of that study had developed ideas about using method rationale as a basis of creating a method for pm3auditing. The usage of method rationale in this fashion gives a higher grade of transparency and insight into the values that are of high importance for successful pm3usage. Our goal in this study has been to develop these ideas into a basis for which the development of a method for pm3auditing, which we want to be practical and efficient.The subject of this study has been the Swedish Tax Agency, where we have studied two maintenance organizations. Our experiences from this have laid the groundwork for how we have developed our visions of a future method for pm3auditing. The theoretical groundwork we have thus laid places great importance on the proper use of narrative interviews. We have also developed practical guidelines for how usage of our pm3auditing method is to be used.

  • 234.
    Larsson, Erik
    Linköpings universitet, Institutionen för datavetenskap, ESLAB - Laboratoriet för inbyggda system. Linköpings universitet, Tekniska högskolan.
    An Integrated System-Level Design for Testability Methodology2000Doktoravhandling, monografi (Annet vitenskapelig)
    Abstract [en]

    HARDWARE TESTING is commonly used to check whether faults exist in a digital system. Much research has been devoted to the development of advanced hardware testing techniques and methods to support design for testability (DFT). However, most existing DFT methods deal only with testability issues at low abstraction levels, while new modelling and design techniques have been developed for design at high abstraction levels due to the increasing complexity of digital systems.

    The main objective of this thesis is to address test problems faced by the designer at the system level. Considering the testability issues at early design stages can reduce the test problems at lower abstraction levels and lead to the reduction of the total test cost. The objective is achieved by developing several new methods to help the designers to analyze the testability and improve it as well as to perform test scheduling and test access mechanism design.

    The developed methods have been integrated into a systematic methodology for the testing of system-on-chip. The methodology consists of several efficient techniques to support test scheduling, test access mechanism design, test set selection, test parallelization and test resource placement. An optimization strategy has also been developed which minimizes test application time and test access mechanism cost, while considering constraints on tests, power consumption and test resources.

    Several novel approaches to analyzing the testability of a system at behavioral level and register-transfer level have also been developed. Based on the analysis results, difficult-to-test parts of a design are identified and modified by transformations to improve testability of the whole system.

    Extensive experiments, based on benchmark examples and industrial designs, have been carried out to demonstrate the usefulness and efficiency of the proposed methodology and techniques. The experimental results show clearly the advantages of considering testability in the early design stages at the system level.

  • 235.
    Larsson, Erik
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Lind, Joakim
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Generisk dataportabilitet för personuppgifter: En kvalitativ fallstudie av Region Östergötland2017Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    I samband med den nya dataskyddsförordningen för EU tillkommer ny lagstiftning kring hur verksamheter får behandla EU-medborgares personuppgifter. En av de stora nyheterna är dataportabilitetskravet som ställer krav på att verksamheter ska kunna överföra individers personuppgifter till individerna själva eller till andra personuppgiftsansvariga. Detta innebär omfattande utmaningar med verksamheters förmåga till interoperabilitet i förhållande till andra aktörer utifrån juridisk, organisatorisk, teknisk och semantisk interoperabilitet. Med dataportabilitetskravet hamnar interoperabilitet i fokus som en förutsättning förverksamheter att uppfylla dataskyddslagstiftningen.

    Mot bakgrund av detta studeras en offentlig organisation som berörs av dataskyddsreformen och kravet på dataportabilitet. I studien inryms en fördjupning av hur organisationen hanterar sina system och strukturer samt jobbar med standarder och samarbeten för att uppnå interoperabilitet i enlighet med dataportabilitet. Det studerade fallet bidrar med insikter för hur andra organisationer kan arbeta med liknande frågor som berör dataportabilitet och interoperabilitet.

    I studien framkommer det att fallorganisationen sedan tidigare arbetar med interoperabilitetsfrågor. Detta är på grund av egenuppmärksammade behov inom verksamheten och inte enbart av lagkravet från dataskyddsförordningen på dataportabilitet. Med hänsyn till dataskyddsförordningen pågår för närvarande interna analyser kring vilka åtgärder som behöver vidtas där dataportabilitet är ett av dessa områden. Organisationen ser utmaningar främst rörande tolkningen av de nya lagkraven, organisatorisk interoperabilitet och semantisk. Arbetet för att kunna uppfylla kravet pågår, och man följer de rekommendationer som ges från rådgivande organisationer, både från EU och nationellt. Studiens kunskapsbidrag bidrar till ökad förståelse för vilken relevans som interoperabilitet har för dataportabilitet kontextualiserat till den nya dataskyddsförordningen. Studien visar relevansen av hur gemensamma spelregler mellan olika parter i form av gemensam juridik bidrar till förbättrade förutsättningar att nå interoperabilitet på även de andra nivåerna: organisatoriskt, tekniskt och semantiskt, vilket utifrån vad studien visar är avgörande för möjligheten till dataportabilitet. Studien bidrar därtill med en användbar konceptuell modell för att utvärdera interoperabilitet som en förutsättning för dataportabilitet för organisationer.

  • 236.
    Larsson, Katarina
    Linköpings universitet, Institutionen för datavetenskap.
    Komprimering av testdata för SOC: -En implementation av metoden vector repeat2007Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Sammanfattning:

    De ökande testdatavolymerna som krävs för att testa moderna System-On-Chip (SOC) bidrar i hög grad till den ökande produktionskostnaden. De stora testdatavolymerna kräver stora och dyra Automatic Test Equipment-minnen (ATE-minnen). För att minska behovet av dessa minnen så har olika komprimeringsmetoder utvecklats.

    Denna rapport beskriver arbetet med att implementera en given komprimeringsmetod för testdata till SOC. Den metod som används heter vector repeat och den implementeras genom skapandet av ett för ändamålet avsett dataprogrogram. För att vector repeat ska fungera effektivt så förutsätts det att in- och utgångarna på den ATE som används kan delas in i olika portar. Portarna används för att korta ner testdatats vektorer, vilket möjliggör en bättre komprimering. Resultaten av implementationen har verifierats med hjälp av experiment där testdata från en benchmark SOC använts och jämförts med okomprimerat testdata samt ytterliggare en komprimeringsmetod som heter 9C. Resultaten visar att vector repeat är en effektiv komprimeringsmetod om antalet portar är tillräckligt stort. Experiment har även genomförts som visar hur mycket komprimeringen förbättras då antalet portar som används ökas.

    Dessa resultat kan användas i framtida arbeten, varav ett exempel är, där kostnaden för ökat antal portar tas i beaktande.

  • 237.
    Larsson, Oskar
    et al.
    Linköpings universitet, Institutionen för systemteknik.
    Karlsson, Jimmy
    Linköpings universitet, Institutionen för systemteknik.
    SDR radar demonstrator using OFDM-modulation2009Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    Today radars are used to measure the distance to almost anything. It is used to determine the position of airplanes as well as the level of an oiltank. To achieve high precision in level gauging radars high quality components are demanded. This makes them expensive.

    In this project we evaluate the possibility to use relatively cheap components, used in radio communication, to measure distances with an OFDM-modulated signal. The components are cheap due to large production volumes rather than low performance.

    To do this we started with working out the theory needed for length estimation. At our disposal we had the SDR SFF Development Platform from Lyrtech. A simulation model of the platform was built in MatLab. This model was used to verify the theory developed. Finally our algorithms was implemented on the development platform.

    Both simulations and real life measurements show that OFDM can be used to measure distances. Even though the hardware used in this project is not dedicated for this application we managed to perform measurements with good accuracy at short range. We believe that with more suitable hardware OFDM-radars will be able to compete with todays high end level gauging radars at all ranges.

  • 238.
    Lee, Francis
    Linköpings universitet, Institutionen för tema, Tema teknik och social förändring. Linköpings universitet, Filosofiska fakulteten.
    Letters & Bytes: Sociotechnical Studies of Distance Education2009Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    This dissertation studies the social aspects of technology in distance education trough the lens of history – in the form of correspondence education – and a possible future – in the form of a project of technical standardization, Learning Objects. The studied cases form a reflexive tool that allows the present of distance education to be seen in perspective.

    In the case of correspondence education, the dissertation shows how the mundane technologies of correspondence letters, grading-forms, answer-templates and self-tests create a specific mode of organizing distance education that bridges the rift between the two major trends in educational modernity: massification and individualization. This attempt brought with it specific consequences for the organization of correspondence education: educators tried to devise methods for individual instruction, but at the same time they tried to industrialize the production through the mass-production of instructional letters. Hence, particular identities and modes of organizing education and arose. The correspondence education cases are studied through conference proceedings and archive material.

    The contemporary cases study the heterogeneous construction of technical standards for the exchange of distance education material between computer systems, so-called Learning Objects. Through these cases, the dissertation shows that Learning Objects are closely tied to a dream of economies of scale and a market for distance education material with particular epistemic and technical consequences. Furthermore, the cases show how the attempt to create economies of scale results in an object oriented and modular way of reusing educational material; and how this modularization leads to an objectified mode of handling knowledge with emphasis on atomization of knowledge, as well as the protection of intellectual property rights through DRM-Technology.  The contemporary cases are studied through technical standards and text-analysis.

    Delarbeid
    1. Coding Copyright: The re-construction of intellectual property in education
    Åpne denne publikasjonen i ny fane eller vindu >>Coding Copyright: The re-construction of intellectual property in education
    2009 (engelsk)Inngår i: Letters & Bytes: Sociotechnical studies of distance education, Linköping: Linköping University , 2009Kapittel i bok, del av antologi (Annet vitenskapelig)
    sted, utgiver, år, opplag, sider
    Linköping: Linköping University, 2009
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-53613 (URN)9781249787730 (ISBN)
    Tilgjengelig fra: 2010-01-26 Laget: 2010-01-26 Sist oppdatert: 2018-01-12bibliografisk kontrollert
    2. Learning in Nowhere: Individualism in Correspondence Education in 1938 and 1950
    Åpne denne publikasjonen i ny fane eller vindu >>Learning in Nowhere: Individualism in Correspondence Education in 1938 and 1950
    2009 (engelsk)Inngår i: History of education review, ISSN 0819-8691, Vol. 38, nr 1, s. 29-39Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    This article seeks to investigate the individualistic ideas, practices, and student identities that developed in correspondence education in the mid twentieth century. In doing so a number of questions about the individualistic pedagogy and identities in correspondence education are posed. How was individualism to be achieved? What pedagogic practices were used? Who could students learn from? What was the desired identity of the students? How were the student’s material circumstances understood? In attempting to answer these questions the article aims to increase understanding of the individual pedagogy and the construction of the ‘independent learner’ at work in correspondence education during its golden age.

    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-42270 (URN)10.1108/08198691200900003 (DOI)62254 (Lokal ID)62254 (Arkivnummer)62254 (OAI)
    Tilgjengelig fra: 2009-10-10 Laget: 2009-10-10 Sist oppdatert: 2018-01-12
    3. Learning Object Standards in Education: Translating Economy into Epistemic Atomism
    Åpne denne publikasjonen i ny fane eller vindu >>Learning Object Standards in Education: Translating Economy into Epistemic Atomism
    2011 (engelsk)Inngår i: Science as Culture, ISSN 0950-5431, E-ISSN 1470-1189, Vol. 20, nr 4, s. 513-533Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    In the early 2000s a technological standard for modular learning material, so-called Learning Objects (LOs), was developed by a group of organizations and individuals. The vision behind developing this technical standard was to create online courses as a jigsaw of independent ‘off the shelf’ pieces that could be found in a database and assembled as you please. Using a computer program, it would be possible to choose the desired materials and join them into a course. In this standardization process, the chief problem of online education was argued to be high production costs, so LOs were performed as a means to lower these costs by achieving economies of scale. Furthermore a technical method, modularization of LOs, was proposed as a means to achieve this aim. It was argued that modularization would be more efficient if course content was broken into ‘packages’ with small ‘granularity’. The economic purpose was, as Actor–Network Theory would put it, translated into technological design. Additional translations put into play links between modularity/ granularity and the treatment of LOs as ‘atomic’. Atomic LOs were to be self- contained, non-sequential, and contextless digital objects. Lastly, in an extreme argument by one of the key proponents, LOs were performed as being the road to a new atomic science of education. By enacting Learning Objects in this manner, a specific materiality of learning was geared toward what I call ‘epistemic atomism’: the performance of knowledge as discrete and basic entities—as stable reference points which exist ‘out there’, beyond any social contextuality.

    Emneord
    standardization, translation, knowledge, atomism, economy, education, Learning Objects
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-53612 (URN)10.1080/09505431.2011.605923 (DOI)000299214300006 ()
    Tilgjengelig fra: 2010-01-26 Laget: 2010-01-26 Sist oppdatert: 2018-01-12
    4. Technopedagogies of mass-individualization: correspondence education in the mid twentieth century
    Åpne denne publikasjonen i ny fane eller vindu >>Technopedagogies of mass-individualization: correspondence education in the mid twentieth century
    2008 (engelsk)Inngår i: History & Technology, ISSN 0734-1512, E-ISSN 1477-2620, Vol. 24, nr 3, s. 239-253Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    This article is about how technology and pedagogy is co-produced in correspondence education. Theoretically the article departs from post-Foucauldian studies of materiality, and uses the concept of dispositif to construct a framework that is inspired by Foucault, Deleuze, and Actor-Network Theory. Empirically, the article treats how the tension between educational thought on progressive individualism, scientific thinking, and automation was coproduced with technical artifacts in correspondence education during the 1930s, 1940s and 1950s. The author shows how this co-production led to a specific mode of organizing correspondence education that tried to accomplish individualization on an industrial basis, and that this mass-individualization built on a pedagogy of testing, recording, classification, and differentiation. In conclusion the article discusses how mass-individualization can be seen as an epitome of educational modernity-s aspiration for equality of educational opportunity and progressive thoughts on individually tailored education. Furthermore the author shows that the dispositif of mass-individualization is closely associated to today-s educational technology, and how today-s educational technology embodies the tension in mass-individualization.

    Emneord
    distance education, educational technology, history, technopedagogy, mass-individualization, dispositif, co-production
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-42269 (URN)10.1080/07341510801900318 (DOI)62253 (Lokal ID)62253 (Arkivnummer)62253 (OAI)
    Tilgjengelig fra: 2009-10-10 Laget: 2009-10-10 Sist oppdatert: 2018-01-12
  • 239.
    Leufvén, Oskar
    et al.
    Linköpings universitet, Institutionen för systemteknik.
    Bergström, Johan
    Linköpings universitet, Institutionen för systemteknik.
    Surge Modeling and Control of Automotive Turbochargers2007Independent thesis Basic level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    Mean Value Engine Modeling (MVEM) is used to make engine control development less expensive. With more and more cars equipped with turbocharged engines good turbo MVEM models are needed. A turbocharger consists of two major parts: turbine and compressor. Whereas the turbine is relatively durable, there exist phenomenons on the compressor that can destroy the turbocharger. One of these is surge.

    Several compressor models are developed in this thesis. Methods to determine the compressor model parameters are proposed and discussed both for the stable operating range as well as for the surge region of a compressor map. For the stationary region methods to automatically parameterize the compressor model are developed. For the unstable surge region methods to get good agreement for desired surge properties are discussed. The parameter sensitivity of the different surge properties is also discussed. A validation of the compressor model shows that it gives good agreement to data, both for the stationary region as well as the surge region.

    Different open loop and closed loop controllers as well as different performance variables are developed and discussed. A benchmark is developed, based on a measured vehicle acceleration, and the control approaches are compared using this benchmark. The best controller is found to be a open loop controller based on throttle and surge valve mass flow.

  • 240.
    Leuhusen, Joakim
    et al.
    Linköpings universitet, Institutionen för systemteknik, Fordonssystem.
    Karlsson, Andreas
    Linköpings universitet, Institutionen för systemteknik, Fordonssystem.
    Simulation and synchronization of distributed real-time systems2010Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Today we are very much dependent on different kinds of real time systems. Usually,a real time system is a system which is interacting with a physical environmentwith sensors or activators. There are many advantages by replacing mechanicalcomponents with electrical ones. For instance, it is usually cheaper and possibleto add new functions to the device without replacing the electronic part, whichwould have been necessary with a mechanical one.The possibility of simulating a distributed system is used throughout the vehi-cle industry. With the simulation of connected sub systems, using modeled busesand real time kernels, one could increase the correctness of the behavior of the sys-tem and consequently decrease the amount of time spent later in the developingprocess.In this master thesis we used modeled CAN-buses and real time models tosimulate the connection and execution time of the systems. The simulation resultsare used to validate the functionality of the distributed system. Additionally, aworst-case response time analysis is made to set timing constraints on the systemto fulfill given deadlines.During the work, different settings of the network are tested to analyze thesystem frequency needed to sustain deadlines and correctness on the network.

  • 241.
    Lindblad-Gidlund, Katarina
    et al.
    Midsweden University, Department of IT and Media, Sundsvall, Sweden.
    Axelsson, Karin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, VITS - Laboratoriet för verksamhetsinriktad systemutveckling. Linköpings universitet, Filosofiska fakulteten.
    Communicating vessels for relevant and rigorous eGovernment research2008Inngår i: Collaboration and the Knowledge Economy: Issues, Applications, Case Studies - Volume 5 Information and Communication Technologies and the Knowledge / [ed] P. Cunningham and M. Cunningham, IOS Press, 2008, , s. 255-261s. 255-261Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    Several researchers have pointed out that the field of eGovernment suffers from a too short-termed, project oriented, retrospective focus and a naïve technological optimism. Reflexive, critical analysis, cumulative research and altered use of theoretical frames are asked for to increase the practical value. However, in front of fulfilling such expectations the reality is that we get the research we are asking for, and we are asking for the research we know exist, and in this logic lies a lot of communicative challenges (as well as funding mechanisms). This article tries to address this relation and does so by putting forward an initiative to establish a national network of eGovernment researchers and practitioners (from private and public sector). 

  • 242.
    Lindell, Tobias
    Linköpings universitet, Institutionen för systemteknik.
    Model-based Air and Fuel Path Control of a VCR Engine2009Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [en]

    The objective of the work was to develop a basic control system for an advancedexperimental engine from scratch. The engine this work revolves around is a Saabvariable compression engine.A new control system is developed based on the naked engine, stripped of theoriginal control system. Experiments form the basis that the control system isbuilt upon. Controllers for throttles, intake manifold pressure for pressures lessthan ambient pressure and exhaust gas oxygen ratio are developed and validated.They were found to be satisfactory. The lambda controller is tested with severalparameter sets, and the best set is picked to be implemented in the engine. Modelsnecessary for the development and validation of the controllers are developed.These models include models for the volumetric efficiency, the pressure dynamicsof the intake manifold, the fuel injectors and wall wetting.

  • 243.
    Lindgren, Ida
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Melin, Ulf
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Time to Refuel the Conceptual Discussion on Public e-Services: Revisiting How e-Services Are Manifested in Practice2017Inngår i: 16th IFIP WG 8.5 International Conference, EGOV 2017, St. Petersburg, Russia, September 4-7, 2017, Proceedings / [ed] Janssen, M et al, Springer, 2017, Vol. 10428, s. 92-101Konferansepaper (Fagfellevurdert)
    Abstract [en]

    There are various models and frameworks describing the nature of e-services in the public sector. Many of these models are based on previous conceptualizations and have evolved over time, but are first and foremost conceptual creations with weak empirical grounding. In the meantime, practitioners in the field have continued to further develop e-services, and new advancements in technology have enabled new solutions for e-services. In the light of advancements in practice, and the limitations seen in current conceptual work concerning public e-services, we identify a need to refuel the conceptual discussion on e-services in the public sector by empirically investigating how e-services can be manifested in practice. The aim of this paper is to illustrate the possible variations of e-services in practice, and to discuss this variation in relation to the conceptual representation of the phenomenon. Based on qualitative interviews with employees involved with e-service development and provision at a large governmental agency, we illustrate that an ‘e-service’ can take on many different forms within an organization; ranging from downloadable forms, to complicated self-service systems that require expertise knowledge and IT-systems with specific processing capacity. The notion that all services mediated through a website can be understood under one general umbrella term, without further categorization, needs to be challenged.

  • 244.
    Lindskog, Helena
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell ekonomi. Linköpings universitet, Tekniska fakulteten.
    Brege, Staffan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell ekonomi. Linköpings universitet, Tekniska fakulteten.
    Brehmer, Per-Olof
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell ekonomi. Linköpings universitet, Tekniska fakulteten.
    Corruption in public procurement and private sector purchasing2010Inngår i: Journal of Organisational Transformation and Social Change, ISSN 1477-9633, E-ISSN 2040-056X, Vol. 7, nr 2, s. 167-188Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This article points out similarities and differences between purchasing by the public and private sectors outgoing from concepts of procurement processes and buying centres. It also analyses corruption isssues in both sectors' purchasing activities. The focus is on public procurement within th European Union (EU), where member states have to follow the European Community directives for public procurement

  • 245.
    Lindstedt, Sara
    Linköpings universitet, Institutionen för datavetenskap.
    Communicating in a Design Team - creating meaning in a design team through boundary objects2005Independent thesis Advanced level (degree of Magister), 20 poäng / 30 hpOppgave
    Abstract [en]

    This thesis explores object based design team communication. It is assumed that boundary objects in design teams serve as an important communication aid and are considered to have a crucial role in the conducting of multidisciplinary teamwork. Objects, such as design specifications and prototypes, can for example help bridging knowledge gaps between the different interests involved and offer guidance and support in their design work. The aim was to identify the possible problems that might occur connected to the different objects used in a design team. In order to study this, an ethnographical inspired study was carried out. Overall results were that the design team needed to extend their use of objects, in order to be fully supported by them in their work. Further, the existing objects needed to be changed or used differently. A “communication resource hub” was suggested, where all the new and old objects could be gathered. In this “resource hub” there should be room for different models that could be applied as a support for deciding on the right objects for the right purpose.

  • 246.
    Lindström, Håkan
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Analys och förslag till förbättringar med avseende på GUI och funktion ur ett användbarhetsperpektiv av programvaran Service Desk Manager2012Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Företaget Kerfi AB i Norrköping är en leverantör av informationsteknik och har bland annat specialistkompetens inom service management. För detta använder de programvara från företaget CA technologies. CA Service Desk Manager är en så kallad IT Service Management applikation med processer för samordning och styrning av service management. Under inledande diskussioner kom det fram att även om programvaran har varit i bruk under flera år så finns det fortfarande problem med användargränssnittet. Uppgiften består i att analysera användargränssnittet ur ett användbarhetsperspektiv för att kunna ta fram förslag på olika lösningar till programvarans påpekade brister.

    För insamling av data användes en expertutvärdering vilket omfattade en heuristisk utvärdering och en consistency inspection. Dessa metoder kompletterades med intervjuer och enkäter för att få fram användarnas åsikter och synpunkter om programvaran.

    Examensarbetet har resulterat i en samling av förslag till sådant som kan förbättras för de delar av användargränssnittet där brister har upptäckts.

  • 247.
    Lorentzon, Marie
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Lindstrand, Anders
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Utveckling av dokumentdatabas2002Independent thesis Basic level (professional degree)Oppgave
    Abstract [sv]

    Denna rapport beskriver ett examensarbete inom Programmet för Användarinriktad Systemutveckling vid Linköpings universitet, Campus Norrköping. Resultatet är en databasapplikation som är utvecklad specifikt för C.N.S. Systems AB i Linköping.

    I uppgiften ingår analys, utformning, realisering, implementering, dokumentation samt i viss mån även förvaltning och drift. Utvecklingsarbetet har skett i nära samarbete med företaget som har tillhandhållit arbetsplatser och datorutrustning.

    Applikationen är ett dokumentregistreringssystem där information om företagets interna och externa dokument lagras. Tidigare har motsvarande uppgifter lagrats i Excel. Den färdiga databasapplikationen har främst gjort det lättare att registrera och söka ett dokument vilket också var ett av de uppsatta målen. Själva databasen är utvecklad i Access och gränssnittet i Visual Basic. Kopplingen mellan dessa är skapad med ActiveX Data Objects 2.0 (ADO).

    Rapporten ger inledningsvis en närmare presentation av utgångsläge och förutsättningar. Därefter beskrivs teorin bakom det arbetssätt som använts. I resultatdelen presenteras applikationen översiktligt, valda delar lite mer ingående. Och slutligen, i diskussionsavsnittet, görs en subjektiv bedömning av resultatet och utvecklingsarbetet.

  • 248.
    Lovering, Philip
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    E-tjänsteutveckling i små kommuner: En komparativ studie mellan två kommuner2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Efter direktiv från en ny digital agenda av EU, anpassade regeringen sin handlingsplan för att ligga i linje med resten av EU. Regeringen satte även upp målet att bli bäst i världen på att använda sig av digitaliseringens möjligheter. För att kunna uppnå denna målsättning krävs insatser på nationell, regional och kommunal nivå. För att regeringen ska kunna uppnå sitt mål är man beroende av att kommunerna uppfyller sin del. Detta har satt press på kommuner, som utvecklar och implementerar nya e-tjänster i ökande takt. Problemet med detta är att långt ifrån alla kommuner har en plan för hur de ska arbeta och utveckla nya e-tjänster. Det resulterar i uteblivna effektivitetsvinster för de kommunala verksamheterna som hade kunnat uppnås om en tydlig strategi hade funnits. Dock konstaterar en sammanställning från SKL att kommuner med stor befolkning generellt sätt arbetar bättre. Det finns korrelationer mellan kommunstorlek och hur bra en kommun arbetar med e-tjänsteutveckling samt de ekonomiska förutsättningarna, som kan tolkas att små kommuner torde arbeta sämre med e-tjänster på grund av sämre förutsättningar. Dock finns undantag, kommuner med liten befolkning som är topprankade trots sämre förutsättningar. Hur kan en kommun med sämre förutsättningar lyckas så pass bra och vad gör dem annorlunda från andra?Syftet med studien är att via en jämförelse av två små kontrasterande kommuner, identifiera arbetssätt och faktorer som krävs för en lyckad e-tjänsteutveckling samt att tillhandahålla förbättringsförslag för kommuner med liknande befolkningsmängd.Studiens syfte har besvarats efter en komparativ undersökning med kvalitativ ansats, som genomförts på två små kommuner. Semistrukturerade intervjuer har utgjort den primära insamlingsmetoden av studiens empiri.Resultatet visar hur en framgångsrik mindre kommun arbetar med e-tjänsteutveckling i jämförelse med en annan mindre kommun. Trots likartade förutsättningar så har den ena kommunen etablerat sig som en av Sveriges bästa kommuner inom e-förvaltning och e-tjänsteutveckling, medan den andra återfinns på motsatt håll. Skillnaderna mellan kommunernas tillvägagångssätt är inte stora, men organisationen bakom och kvalitén i det som utförs skiljer sig markant. Dock finns det områden som även den mer framstående kommunen kan förbättra. Utvärdering, marknadsföring och en större involvering av användare är områden som bör prioriteras för att nå bättre slutresultat.

  • 249.
    Lovering, Philip
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Hörmann Berggren, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Hur projektstyrningsmodeller påverkas av kontextuella och kulturella faktorer inom IT.: En studie om överföring.2015Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Globaliseringen är ett ämne som möter oss varje dag även om vi tänker på det eller inte. Vi använder utländska produkter och kanske även använder olika metoder att genomföra saker på som har sitt ursprung i en annan världsdel. Företag arbetar på daglig basis med projekt och IT-projekt över hela jorden. Vår studie syftar till att undersöka hur kulturella och kontextuella faktorer påverkar internationella företag när nya projekt och IT-projekt initieras i andra länder. Till hjälp använder vi oss bland annat av Hofstedes kulturdimensionsteorier som beskriver hur olika länder skiljer sig åt gällande kultur i fem olika dimensioner. Vi använder oss även av konvergensteorier, divergensteorier samt teorier kring translation som behandlar hur modeller och teknologi kan appliceras i nya kontexter. Konvergensteorier menar att modeller är universella samt att företag och länder är homogena varför det går att direkt översätta modeller utan att de behöver anpassas. Divergensteorier menar att heterogenitet existerar och att modeller således behöver anpassas till kontext. Translation är en blandning av divergens och konvergens. Vi har avgränsat oss till att enbart undersöka projektarbeten och kommer därför att definiera vad temporära organisationer är och vad de innebär samt att vi kommer reda ut projektstyrning. Detta har skett genom en hermeneutiskt kvalitativ studie där vi använt en abduktiv ansats. Empiri har samlats in genom semistrukturerade intervjuer som sedan tematiserats för analys. Studiens resultat visar att projektstyrningsmodellers överföring och implementering och dess användande påverkas av branschspecifika faktorer, nationell kultur samt organisationskultur. Studien har visat att det i implementeringsfasen krävs en medveten översättning som resulterar i en form av anpassning med hänsyn till i synnerhet organisationskultur, som påvisar och styrker en divergent heterogenereringsprocess. Vid en internationell överföring eller brukande av en projektstyrningsmodell i ett internationellt sammanhang måste även olika kulturella aspekter beaktas.

  • 250.
    Lundberg, Elin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Eriksson, Linn
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    UPPLEV GAMIFICATION: En studie om användarupplevelser av gamification samt dess upplevda syfte inom callcenters2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Gamification är ett relativt nytt fenomen som blir mer vedertaget i företagsvärlden. Kort beskrivet innebär det att spelmekanismer och spelelement implementeras i en icke-spelkontext, exempelvis inom ett informationssystem på ett företag. Detta görs för att stimulera motivation och engagemang från användarna och på så sätt bidra med nöjdare, mer tillfredsställda anställda och högre resultat. Trots att fenomenet blir allt vanligare på arbetsplatser saknas forskning om hur användarna upplever att arbeta på ett gamifierat sätt. 

     

    Vi har med denna studie undersökt användarnas egna upplevelser och jämfört dessa med hur arbetsledarna reflekterar över den påverkan gamification har på anställda. Detta har gjorts för att nyansera förståelsen för hur gamification påverkar användare inom en callcenterkontext. Vi undersöker även hur väl syftet är förankrat och förstått av användarna. Studien har genomförts med en kvalitativ ansats där data samlades in genom semistrukturerade intervjuer där empirin sedan kodades efter teman vanliga inom området.

     

    Resultatet visar på att det finns olika uppfattningar om vad gamifications syfte är, men den vanligaste uppfattning är att det syftar till att göra arbetet mer tillfredsställande. I frågan om hur användarna upplever att arbeta i ett gamifierat system kom vi fram till ett flertal teman där motivation, tillfredsställelse samt engagemang var mest förekommande upplevelserna. Vi fann även att upplevelser såsom stress, press och frustration var förekommande vilket inte diskuterats utförligt i tidigare litteratur inom gamification. Vi hittade även likheter och skillnader mellan användares och arbetsledares perspektiv gällande hur gamification upplevs av användare. De mer märkbara likheterna vi fann var upplevelser om tillfredsställelse och nöje samt ett ökat engagemang. Dock fann vi skillnader i hur användare och arbetsledare uppfattade motivationsfaktorer, upplevd motivation inom gamification samt huruvida användare upplevde stress.  

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