liu.seSearch for publications in DiVA
Change search
Refine search result
456789 301 - 350 of 408
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 301.
    Nordström, Malin
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Welander, Tommy
    På i Stockholm AB.
    .com from a maintenance management perspective2007Report (Other academic)
    Abstract [en]

    Websites pose a special challenge from a system maintenance management perspective. What should be managed? How does the site relate to content? Who will be responsible for what? In the report, these questions are addressed based on the management management model pm3

  • 302.
    Nordström, Malin
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Welander, Tommy
    På AB, Stockholm.
    .se ur ett systemförvaltningsperspektiv2007Report (Other academic)
    Abstract [sv]

    Webbplatser utgör en speciell utmaning ur ett systemförvaltningsperspektiv. Vad skall förvaltas? Hur förhåller sig webbplatsen till innhållet? Vem skall ansvara för vad? I rapporten adresseras dessa frågor med utgångspunkt i förvaltningsstyrningsmodellen pm3. 

  • 303.
    Norén, Bång Ola
    Linköping University, Department of Computer and Information Science.
    STCA: an aircraft conflict alert system2004Independent thesis Basic level (professional degree)Student thesis
    Abstract [en]

    The purpose of this Master’s Thesis is to produce a specification for the aircraft conflict alert system STCA, and implement a prototype as a module in the air traffic surveillance system NOVA9000.

    The specification is constructed based on functional requirements from EUROCONTROL and describes a system using a nominal trajectory method, where the future paths of aircraft are estimated. The trajectory is created using a probabilistic approach, where future positions are described with probability fields.

    The prototype is implemented using the specification with some simplifications. The prototype is evaluated using recorded traffic from a heavy air traffic region surrounding an airport with parallel runways. 15 alerts were induced in 1,5 hour of morning traffic; this is far too much to be acceptable. Improvements are proposed and explanations to the high rate of alerts are made.

  • 304.
    Norén, Henrik
    Institutionen för systemteknik.
    Industrial Ethernet and new possibilities - Simplifying function tests of industrial devices2010Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    What do you do if you are implementing a new fieldbus protocol in your embed- ded industrial system and want to test it? This was the question that a group of engineers at ABB Corporate Research was asking themselves. Normally, the easiest way would probably be to buy a matching device supporting the same protocol and hook it up to the system. You might also need some equipment to listen in on the traffic between the two, so you’d need to buy that too.

    But what if you are working with a limited budget? Or what if this protocol is fairly new, and matching devices are hard to find? Or what if you want to test cases that can’t normally be achieved with normal usage?

    Normally, with traditional fieldbus standards, this could be complicated. You would probably need an additional sample of your new system, with some cus- tom made test code, and use this to test the original system. This is not a bad method, but this report will give an example of the new possibilities that comes with the new Ethernet base fieldbus standards emerging on the market today. It will highlight the possibility to create a test tool for your industrial system to use on a standard PC.

    ”Why?” you might ask. The report suggests that this solution is cheap, fast and flexible. First of all, no special hardware was needed, which had a posi- tive impact on cost. The only thing used was a PC and some standard office equipment.

    Second, once the test tool was created, new test cases was really fast and easy to make. The test tool was designed to function as a general framework for creating dynamic test sequences based on Ethernet.

    Third, the tool is flexible enough to test a lot of different cases, even cases not allowed by the standard. It made it possible to test cases that would have required the use of several samples of test system simultaneously to work. Also, because Ethernet is such a well known standard, there are a lot of existing software tools at your disposal. For example, free software for capturing and analyzing the test results was used during the tests. Furthermore, since the test tool was designed to be easily extendable to handle more protocols, it is even more flexible and useable for future similar problems.

  • 305.
    Nyberg, Peter
    Linköping University, Department of Electrical Engineering.
    Evaluation of two Methods for Identifiability Testing2009Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis concerns the identifiability issue; which, if any, parameters can be deduced from the input and output behavior of a model? The two types of identifiability concepts, a priori and practical, will be addressed and explained. Two methods for identifiability testing are evaluated and the result shows that the two methods work well if they are combined. The first method is for a priori identifiability analysis and it can determine the a priori identifiability of a system in polynomial time. The result from the method is probabilistic with a high probability of correct answer. The other method takes the simulation approach to determine whether the model is practically identifiable. Non-identifiable parameters manifest themselves as a functional relationship between the parameters and the method uses transformations of the parameter estimates to conclude if the parameters are linked. The two methods are verified on models with known identifiability properties and then tested on some examples from systems biology. Although the output from one of the methods is cumbersome to interpret, the results show that the number of parameters that can be determined in practice (practical identifiability) are far fewer than the ones that can be determined in theory (a priori identifiability). The reason for this is the lack of quality, noise and lack of excitation, of the measurements.

  • 306.
    Nylander, Åsa
    Linköping University, Department of Science and Technology.
    Sensorfusion för ACC-System2007Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    By fusing data from different sensors a result can be achieved that is worth more than the data from each sensor by itself. Which sensors and sensor fusion methods that could be used in Scania's adaptive cruise control system (ACC) is investigated. The ACC system adapts the vehicle's speed not only to a driver decided set speed but also to the speed of preceding vehicles. Scania's ACC system uses a radar for target detection.

    There exists a number of algorithms and architectures fit for use in sensor fusion systems. Which one to use depends on the level of the data to be fused and on the field of application. Least square methods are used when matching data to a physical model, data to be used is often at a low level. When working with data at decision level, probability methods are favored. Another example is intelligent fusion, cognitive methods intending to mimic the human decision process. Suitable data is data at a high level.

    Two solutions, for two different sensor sets, are proposed. Both solutions are made out of Bayesian networks. The first one fuses data from the existing radar unit with data from a camera which detects lane markings. The results show that lane changes can be detected earlier thanks to the fusion. The second network uses two radar sensors of the same kind as the first, resulting in a wider field of view. The network decides which ones of each radars targets that are the same matching targets. This information could be used to increase the redundancy of the system and to detect targets earlier.

  • 307.
    Odd, Joel
    et al.
    Linköping University, Department of Computer and Information Science.
    Theologou, Emil
    Linköping University, Department of Computer and Information Science.
    Utilize OCR text to extract receipt data and classify receipts with common Machine Learning algorithms2018Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This study investigated if it was feasible to use machine learning tools on OCR extracted text data to classify receipts and extract specific data points. Two OCR tools were evaluated, the first was Azure Computer Vision API and the second was Google Drive REST Api, where Google Drive REST Api was the main OCR tool used in the project because of its impressive performance. The classification task mainly tried to predict which of five given categories the receipts belongs to, and also a more challenging task of predicting specific subcategories inside those five larger categories. The data points we where trying to extract was the date of purchase on the receipt and the total price of the transaction. The classification was mainly done with the help of scikit-learn, while the extraction of data points was achieved by a simple custom made N-gram model.

    The results were promising with about 94 % cross validation score for classifying receipts based on category with the help of a LinearSVC classifier. Our custom model was successful in 72 % of cases for the price data point while the results for extracting the date was less successful with an accuracy of 50 %, which we still consider very promising given the simplistic nature of the custom model.

  • 308.
    Ozolina, Lelde
    et al.
    Linköping University, Department of Management and Engineering.
    Jonsson, Zandra
    Linköping University, Department of Management and Engineering.
    Datorisering i en offentlig verksamhet: Förstudie av införande av datoriserat system i Norrköpings Kommun2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Norrköpings kommun har en viktig roll i samhället, mot medborgare och företagare. Det betyder att kommunens e-förvaltning har stor betydelse för den framtida utvecklingen. Medborgarnas krav på service och e-tjänster har ökat markant, därför har allt fler offentliga verksamheter intresserat sig för en konkurrenskraftig e-förvaltning. De befintliga e-tjänster och de elektroniska ärendehanteringssystemen inom Norrköpings kommun är varierande och saknar anslutning till varandra. Med en ökad medvetenhet och en vilja att förändras finns det bra förutsättningar för en samverkan mellan dessa IT-system. Med hjälp av datorisering kan system samverka bättre och Norrköpings kommun bli mer attraktiv, flexibel och effektiv för så väl medborgare som medarbetare. Vid ett införande av en datorisering bör en föranalys och verksamhetsanalys genomföras, något som ligger till grund för vår studie. Den har bestått i att kartlägga planprocessen med innefattande aktiviteter för att identifiera behov samt begränsningar i arbetsprocessen. Resultatet har visat att de studier vi utfört kan komma att främja den kunskap och medvetenhet inom datorisering och hur denna påverkar de arbetssätt som finns inom Norrköpings kommun. Utifrån resultatet kunde vi även fastställa att det fanns förbättringsområden inom planprocessen inför datoriseringen på Fysisk Planering. Det kommer att ske omfattande verksamhetsförändringar vid införandet av datorisering. Något som medarbetarna bör vara med på, genom att vara delaktiga. Vi vill understryka att det är av stor vikt att verksamheten ser till att involvera medarbetarna, både i och under införandet av Ärendenavet. Vi anser att det finns ett praktiskt värde i vår studie i och med att den underrättar offentliga verksamheter om de faktorer som bör uppmärksammas och åtgärdas vid en datorisering. Vi vill belysa att det inte bara är att införa ett nytt system. En viktig del är, att i ett tidigt skede reflektera över vad det kommer att medföra för medarbetare och deras arbetssätt. Det är viktigt att ta reda på styrkor och svagheter för att undvika fallgropar i det nya systemet och göra datoriseringen så optimalt som möjligt.

  • 309.
    Perfect, Henrik
    Linköping University, Department of Computer and Information Science.
    Bakom 24-timmarskommunens ansikte: Om utvecklingen av en medborgarassistent i Enköpings kommun2005Independent thesis Advanced level (degree of Magister), 10 points / 15 hpStudent thesis
    Abstract [en]

    In the late 1990s the Swedish government launched their ideas on strategic use of information and communication technology (ICT) to improve public administration. The ideas have come to revolve around the ability to meet the changing needs and demands of citizens by using electronic web based services.

    In this context there is a growing interest in interactive web assistants, or FAQ robots among Swedish municipalities. The focal point of this instrumental case study is the introduction and use of an interactive web assistant that has been developed in order to improve the web services provided by the Swedish municipal government of Enköping. The purpose of this study is to gain knowledge of what kind of arguments and thoughts that took place, and issues that were involved in the developing process and preparation of the web assistant. This knowledge may be of interest in similar situations when developing public web based information systems.

    The study portrays how the web assistant in Enköping has evolved from discussions about access to municipal information to become a part of a strategy to use the Internet as the main channel for municipal information and communication. The purpose of launching the assistant, as mentioned by interviewees in Enköping, was to guide citizens with common and frequently asked questions to information on the municipal website in order to answer their questions. This, when common questions are being solved with the use of web based information, is expected to free resources so more complex questions and cases can be handled effectively by the municipal staff. The visions and strategies underpinning the Enköping assistant are similar to national ideas of focusing on citizens’ needs and demands on access to public information. But the study also pin points a gap between the strategies and procedures in the development of the assistant. The study concludes that extended preparatory work may reduce the gap and allow the municipal government to identify reasonable goals and defining citizens’ needs in order to develop an assistant to meet the specific demands of their particular citizens.

  • 310.
    Persson, Anders
    et al.
    Linköping University, Department of Computer and Information Science, VITS - Development of Informations Systems and Work Context. Linköping University, Faculty of Arts and Sciences.
    Axelsson, Karin
    Linköping University, Department of Management and Engineering, VITS - Development of Informations Systems and Work Context. Linköping University, Faculty of Arts and Sciences.
    Melin, Ulf
    Linköping University, Department of Computer and Information Science, VITS - Development of Informations Systems and Work Context. Linköping University, Faculty of Arts and Sciences.
    e-Government challenges: Exploring inter-organisational aspects of e-service development2006In: Proceedings of the Fourteenth European Conference on Information Systems, ECIS 2006, Göteborg, Sweden, 2006 / [ed] Jan Ljungberg, Magnus Andersson, Göteborg: University of Gothenburg , 2006, p. 1419-1430Conference paper (Refereed)
    Abstract [en]

    In this paper we are applying inter-organizational concepts from the industrial/business network approach on empirical findings from an e-government case, in order to describe and better understand challenges in one-stop government e-service development. We analyze our case by using concepts that characterize an inter-organizational relationship in terms of its level of continuity, complexity, symmetry, informality, and its dimensions (links, bonds, and ties). The purpose of the paper is to explore how these theoretical concepts can help us focus on certain aspects of e-service development challenges. The empirical findings are collected within an on-going action research project for e-service development in the public sector in Sweden. The aim of the project is to develop one-stop government e-services for driver’s license matters as well as a web-based portal where these e-services and information about the driver’s license process will be easily accessible. Our conclusions are that the theoretical concepts helped us reach further understanding of the empirical case. In the spirit of the network approach, we focused on the present situation and been able to give a rather detailed and fine-grained picture of the problems and challenges in this context.

  • 311.
    Pettersson, Ulrika
    Linköping University, Department of Electrical Engineering, Vehicular Systems.
    Implementing and studying the effects of a roll stability system in heavy vehicles using a moving simulator2010Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis presents the making and the implementation of a roll stability system for a simulator truck. The purpose of the system is to prevent rollover. The making of the system consists of three parts; calculating the roll angle, calculating a rollover index and constructing the control system. The roll angle was calculated using a one degree of freedom model of the truck with the measured lateral acceleration as input signal. Using the roll angle and the roll rate, a rollover index was calculated. The controller made the truck brake to avoid the impending rollover when the rollover index was at a critical point. The benefits of the system were measured by conducting a study in which test persons drove the simulator truck both with the stability system switched on and switched off. The scenario in the study was carefully constructed so that it would test the system thoroughly. The results were not unambiguous, in some situations the roll stability system prevented roll over, but in others it had the opposite effect.

  • 312.
    Pilemalm, Sofie
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    ICT-Enabled Citizen Co-production in Excluded Areas – Using Volunteers in Emergency Response2019In: Electronic Participation: 11th IFIP WG 8.5 International Conference, ePart 2019, San Benedetto Del Tronto, Italy, September 2–4, 2019 Proceedings / [ed] Panos Panagiotopoulos, Noella Edelmann, Olivier Glassey, Gianluca Misuraca, Peter Parycek, Thomas Lampoltshammer and Barbara Re, Cham: Springer, 2019, p. 87-101Conference paper (Refereed)
    Abstract [en]

    One of many contemporary public-sector challenges is the increasing socio-economic gaps and excluded areas in many cities worldwide. This study explores ICT-enabled citizen co-production using volunteers as first responders in excluded areas near Stockholm, the capital of Sweden. The study indicates that these volunteers can make a major difference if arriving first at an emergency site, e.g. saving lives by administering CPR and extinguishing fires before they spread. Major challenges relate to individual versus collective engagement, gender aspects and language barriers. Current ICT support, in the form of text messages or a basic app, is deemed sufficient but, for the initiative to expand and enable long-term effective engagement, calibrated solutions matching competence, role and language with incident and area are needed. In a public-sector innovation context, the study highlights the need for future research on digitalized co-production with an explicit focus on the ICT artifact and its co-creation artifact as catalysts for change. In relation to this, this study confirms previous research arguing for the merging of policy science and information systems research in an era of rapid digitalized public-sector transformation, but adds that they need to be complemented by perspectives from sociology, e.g. on gender and ethnicity, in initiatives involving citizens in excluded areas.

  • 313.
    Pilemalm, Sofie
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Hallberg, Niklas
    Totalförsvarets forskningsinstitut, Linköping.
    Sparf, Magnus
    Totalförsvarets forskningsinstitut, Linköping.
    Niclasson, Tomas
    Försvarsmakten, Stockholm.
    Practical Experiences of Model-based Development: Case studies from the Swedish Armed Forces2012In: Systems Engineering, ISSN 1098-1241, E-ISSN 1520-6858, Vol. 15, no 4, p. 407-421Article in journal (Refereed)
    Abstract [en]

    This study explores practical experiences of model-based development and implementation, focusing on “lessons identified.” The study draws on experience from several case studies in the Swedish Defence domain using semistructured interviews as the major source of information. The study identifies several conditions as being crucial for successful implementation of model-based development work, including an increased focus on the planning and premodeling phase, a need for interorganizational or across-project collaboration, scalability, change management, and documentation and reuse of experiences. It was also found that most of the challenges identified in the model-based development and implementation processes are common organizational and system development related problems such as change management, the issue of user participation, and how to carry out requirements engineering based on the models. Therefore, future research in the area should aim for a more integrative perspective, for instance, bridging the gap between information collection, models, user needs, and organizational and system requirements

  • 314.
    Pilemalm, Sofie
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Lindgren, Ida
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Ramsell, Elina
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Emerging forms of inter-organizational and cross-sector collaborations in e-government initiatives: Implications for participative development of information systems2016In: Transforming Government: People, Process and Policy, ISSN 1750-6166, E-ISSN 1750-6174, Vol. 10, no 4, p. 605-636Article in journal (Refereed)
    Abstract [en]

    Purpose – This study aims to explore recent public sector trends, inter-organizational and cross-sector

    collaborations, and analyzes these in terms of implications for participative development of information

    systems (IS). These trends are understood as being part of emerging forms of e-government. Initial

    suggestions for how to develop IS in the new contexts are provided.

    Design/methodology/approach – Three cases involving the trends described above, taking place in

    the Swedish emergency response system, are studied and used as basis for identified participative IS

    development challenges and suggested adaptation needs. Data collection involves semi-structured

    interviews, focus groups and future workshops.

    Findings – The identified challenges concern balancing ideological versus practical needs, lack of

    resources, lack of know-how and design techniques and tool challenges. Some practical implications for

    participative IS development include more extensive focus on stakeholder and legal analysis, need for

    interdisciplinary design teams, merging of task and needs analysis for yet-undefined user tasks and

    using on-line alternatives for interacting with users.

    Research implications/limitations – The study is exploratory where the three cases are in

    different, but at the same time interrelated, collaboration contexts. The identified implications and

    challenges provide proposals that in future research can be applied, formalized and integrated when

    developing practically feasible participative IS development approaches.

    Originality/value – It is argued that the results point toward a current emerging form of

    e-government initiatives directed toward certain demarcated groups of citizens actually carrying out

    certain tasks for their co-citizens and society rather than the broad masses, having far-reaching

    practical implications and complicating the issue of IS development.

  • 315.
    Pop, Traian
    Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory. Linköping University, The Institute of Technology.
    Analysis and Optimisation of Distributed Embedded Systems with Heterogeneous Scheduling Policies2007Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The growing amount and diversity of functions to be implemented by the current and future embedded applications (like, for example, in automotive electronics) have shown that, in many cases, time-triggered and event-triggered functions have to coexist on the computing nodes and to interact over the communication infrastructure. When time-triggered and event-triggered activities have to share the same processing node, a natural way for the execution support can be provided through a hierarchical scheduler. Similarly, when such heterogeneous applications are mapped over a distributed architecture, the communication infrastructure should allow for message exchange in both time-triggered and event-triggered manner in order to ensure a straightforward interconnection of heterogeneous components.

    This thesis studies aspects related to the analysis and design optimisation for safety-critical hard real-time applications running on hierarchically scheduled distributed embedded systems. It first provides the basis for the timing analysis of the activities in such a system, by carefully taking into consideration all the interferences that appear at run-time between the processes executed according to different scheduling policies. Moreover, due to the distributed nature of the architecture, message delays are also taken into consideration during the timing analysis. Once the schedulability analysis has been provided, the entire system can be optimised by adjusting its configuration parameters. In our work, the entire optimisation process is directed by the results from the timing analysis, with the goal that in the end the timing constraints of the application are satisfied. The analysis and design methodology proposed in the first part of the thesis is applied next on the particular category of distributed systems that use FlexRay as a communication protocol. We start by providing a schedulability analysis for messages transmitted over a FlexRay bus, and then by proposing a bus access optimisation algorithm that aims at improving the timing properties of the entire system.

    For all the problems that we investigated, we have carried out extensive experiments in order to measure the efficiency of the proposed solutions. The results have confirmed both the importance of the addressed aspects during system-level design, and the applicability of our techniques for analysing and optimising the studied systems.

  • 316.
    Presutti, Valentina
    et al.
    ISTC-CNR.
    Blomqvist, Eva
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Daga, Enrico
    ISTC-CNR.
    Gangemi, Aldo
    ISTC-CNR.
    Pattern-Based Ontology Design2012In: Ontology Engineering in a Networked World / [ed] Mari Carmen Suárez-Figueroa, Asunción Gómez-Pérez, Enrico Motta and Aldo Gangemi, Springer Berlin/Heidelberg, 2012, p. 35-64Chapter in book (Other academic)
    Abstract [en]

    In this chapter, we present ontology design patterns (ODPs), which are reusable modeling solutions that encode modeling best practices. ODPs are the main tool for performing pattern-based design of ontologies, which is an approach to ontology development that emphasizes reuse and promotes the development of a common “language” for sharing knowledge about ontology design best practices. We put specific focus on content ODPs (CPs) and show how they can be used within a particular methodology. CPs are domain-dependent patterns, the requirements of which are expressed by means of competency questions, contextual statements, and reasoning requirements. The eXtreme Design (XD) methodology is an iterative and incremental process, which is characterized by a test-driven and collaborative development approach. In this chapter, we exemplify the XD methodology for the specific case of CP reuse. The XD methodology is also supported by a set of software components named XD Tools, compatible with the NeOn Toolkit, which assist users in the process of pattern-based design.

  • 317.
    Purra, Joel
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Swedes Online: You Are More Tracked Than You Think2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    When you are browsing websites, third-party resources record your online habits; such tracking can be considered an invasion of privacy. It was previously unknown how many third-party resources, trackers and tracker companies are present in the different classes of websites chosen: globally popular websites, random samples of .se/.dk/.com/.net domains and curated lists of websites of public interest in Sweden. The in-browser HTTP/HTTPS traffic was recorded while downloading over 150,000 websites, allowing comparison of HTTPS adaption and third-party tracking within and across the different classes of websites.

    The data shows that known third-party resources including known trackers are present on over 90% of most classes, that third-party hosted content such as video, scripts and fonts make up a large portion of the known trackers seen on a typical website and that tracking is just as prevalent on secure as insecure sites.

    Observations include that Google is the most widespread tracker organization by far, that content is being served by known trackers may suggest that trackers are moving to providing services to the end user to avoid being blocked by privacy tools and ad blockers, and that the small difference in tracking between using HTTP and HTTPS connections may suggest that users are given a false sense of privacy when using HTTPS.

  • 318.
    Rahimi, Bahlol
    et al.
    Urmia Univ Med Sci, Iran.
    Nadri, Hamed
    Urmia Univ Med Sci, Iran.
    Afshar, Hadi Lotfnezhad
    Urmia Univ Med Sci, Iran.
    Timpka, Toomas
    Linköping University, Department of Medical and Health Sciences, Division of Community Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Business support and Development, Department of Health and Care Development.
    A Systematic Review of the Technology Acceptance Model in Health Informatics2018In: Applied Clinical Informatics, ISSN 1869-0327, Vol. 9, no 3, p. 604-634Article in journal (Refereed)
    Abstract [en]

    Background One common model utilized to understand clinical staff and patients technology adoption is the technology acceptance model (TAM). Objective This article reviews published research on TAM use in health information systems development and implementation with regard to application areas and model extensions after its initial introduction. Method An electronic literature search supplemented by citation searching was conducted on February 2017 of the Web of Science, PubMed, and Scopus databases, yielding a total of 492 references. Upon eliminating duplicates and applying inclusion and exclusion criteria, 134 articles were retained. These articles were appraised and divided into three categories according to research topic: studies using the original TAM, studies using an extended TAM, and acceptance model comparisons including the TAM. Results The review identified three main information and communication technology (ICT) application areas for the TAM in health services: telemedicine, electronic health records, and mobile applications. The original TAM was found to have been extended to fit dynamic health service environments by integration of components from theoretical frameworks such as the theory of planned behavior and unified theory of acceptance and use of technology, as well as by adding variables in specific contextual settings. These variables frequently reflected the concepts subjective norm and self-efficacy, but also compatibility, experience, training, anxiety, habit, and facilitators were considered. Conclusion Telemedicine applications were between 1999 and 2017, the ICT application area most frequently studied using the TAM, implying that acceptance of this technology was a major challenge when exploiting ICT to develop health service organizations during this period. A majority of the reviewed articles reported extensions of the original TAM, suggesting that no optimal TAM version for use in health services has been established. Although the review results indicate a continuous progress, there are still areas that can be expanded and improved to increase the predictive performance of the TAM.

  • 319.
    Ramsell, Elina
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Andersson Granberg, Tobias
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    Pilemalm, Sofie
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Identifying functions for smartphone basedapplications in volunteer emergency response2019In: Proceedings of the 16th International Conference on Information Systems for Crisis Response And Management / [ed] Zeno Franco, José J. González, José H. Canós, Information Systems for Crisis Response and Management , 2019, p. 1044-1056Conference paper (Refereed)
    Abstract [en]

    Emergency response organisations struggle with resource constraints and thereby faces challenges in providing high-quality public services. Utilising voluntary first responders is one way to address these challenges. There are different types of volunteers who can help at an emergency site, e.g. citizen volunteers or voluntary professionals from other occupations. To successfully engage with and utilise these resources, adequate information and communication technology (ICT) is necessary. In this meta-study, combining and further exploring two previous studies, the aim is to identify, analyse and evaluate suitable functions for smartphone applications that can be used to dispatch and support volunteers. The results show that the functions can be divided into essential ones that are necessary for the response to work at all, and others that might contribute to a more effective response. The study also shows that the same functions can be used for different volunteer groups.

  • 320.
    Randorff Højen, Anne
    et al.
    Department of Health Science and Technology, Medical Informatics, Aalborg University, Denmark.
    Sundvall, Erik
    Linköping University, Department of Biomedical Engineering, Medical Informatics. Linköping University, The Institute of Technology.
    Rosenbeck Gøeg, Kirstine
    Department of Health Science and Technology, Medical Informatics, Aalborg University, Denmark.
    Visualizing sets of SNOMED CT concepts to support consistent terminology implementation and reuse of clinical dataManuscript (preprint) (Other academic)
    Abstract [en]

    Inconsistent use of concepts is an obstacle when implementing SNOMED CT to improve comparability of information. Terminology implementation should be approached by common strategies for navigating and selecting proper concepts. This study aims to explore ways of illustrating common pathways and ancestors of particular sets of concepts, to support consistent use of SNOMED CT in EHR-system implementation processes. The prototype presented here is an interactive web-based reimplementation of the terminology visualization tool TermViz. The open source prototype contains terminological features that are of relevance when exploring and comparing sets of concepts in SNOMED CT. This includes interactively rearranging graphs, fetching more concept nodes, illustrating least common parents and shared pathways in merged graphs etc. Future work should focus on evaluating the developed prototype in order to assess its applicability in EHR-system-implementation contexts.

  • 321.
    Ranerup, Agneta
    et al.
    Department of Applied Information Technology, University of Gothenburg, Gothenburg, Sweden; Centre for Person-centred Care (GPCC), Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Hallberg, Inger
    Centre for Person-centred Care (GPCC), Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Actors and intentions in the development process of a mobile phone platform for self-management of hypertension2015In: Informatics for Health and Social Care, ISSN 1753-8157, E-ISSN 1753-8165, Vol. 40, no 4, p. 299-318Article in journal (Refereed)
    Abstract [en]

    Aim: The aim of this study was to enhance the knowledge regarding actors and intentions in the development process of a mobile phone platform for self-management of hypertension. Methods: Our research approach was a 14-month longitudinal “real-time ethnography” method of description and analysis. Data were collected through focus groups with patients and providers, patient interviews, and design meetings with researchers and experts. The analysis was informed by the concepts of actors and inscriptions in actor-network theory (ANT). Results: Our study showed that laypersons, scientific actors, as well as technology itself, might influence development processes of support for self-management of hypertension. The intentions were inscribed into the technology design as well as the models of learning and treatment. Conclusions: The study highlighted important aspects of how actors and intentions feature in the development of the mobile phone platform to support self-management of hypertension. The study indicated the multifacetedness of the participating actors, including the prominent role of technology. The concrete results of such processes included questions in the self-report system, learning and treatment models.

  • 322.
    Rankin, Amy
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Making Sense of Adaptations: Resilience in High-Risk Work2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    To cope with variations, disturbances, and unexpected events in complex socio-technical systems people are required to continuously adapt to the changing environment, sometimes in novel and innovative ways. This thesis investigates adaptive performance in complex work settings across domains, with a focus on examining what enables and disables successful adaptations, and how contextual factors shape performance. Examples of adaptive performance studies include a crisis command team dealing with the loss of key personnel, a crew coping with unreliable system feedback in the cockpit, and a nursing team managing an overload of patients. The two main contributions of this thesis is the analysis of cases of people coping with variations and disturbances, and the development of conceptual models to report findings, structure cases, and make sense of sharp-end adaptations in complex work settings. The findings emphasise that adaptive performance outside procedures and textbook scenarios at the sharp end is a critical ability to cope with variation and unexpected events. However, the results also show that adaptations may come at the cost of new vulnerabilities and system brittleness. Analysing adaptive performance in everyday events informs safety management by making visible limitations and possibilities of system design, organisational structures, procedures, and training.

    List of papers
    1. Sensemaking following surprise in the cockpit-a re-framing problem
    Open this publication in new window or tab >>Sensemaking following surprise in the cockpit-a re-framing problem
    2016 (English)In: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 18, no 4, p. 623-642Article in journal (Refereed) Published
    Abstract [en]

    Re-framing is the process by which a person "fills the gap" between what is expected and what has been observed, that is, to try and make sense of what is going on following a surprise. It is an active and adaptive process guided by expectations, which are based on knowledge and experience. In this article, surprise situations in cockpit operations are examined by investigating the re-framing process. The results show difficulties that pilots have in re-framing following surprise, including the identification of subtle cues and managing uncertainties regarding automated systems, coping with multiple goals, tasks and narrow time frames and identifying an appropriate action. A crew-aircraft sensemaking model is presented, outlining core concepts of re-framing processes and sensemaking activities. Based on the findings, three critical areas are identified that deserve further attention to improve pilot abilities to cope with unexpected events; (1) identification of what enables and obstructs re-framing, (2) training to build frames and develop re-framing strategies and (3) control strategies as part of the re-framing process.

    Keywords
    Sensemaking; Surprise; Cockpit operations; Re-framing; Training
    National Category
    Production Engineering, Human Work Science and Ergonomics
    Identifiers
    urn:nbn:se:liu:diva-132839 (URN)10.1007/s10111-016-0390-2 (DOI)000386502500001 ()
    Note

    Funding Agencies|Man4Gen

    Available from: 2016-12-06 Created: 2016-11-30 Last updated: 2017-12-13
    2. Resilience in Everyday Operations: A Framework for Analysing Adaptations in High Risk Work
    Open this publication in new window or tab >>Resilience in Everyday Operations: A Framework for Analysing Adaptations in High Risk Work
    Show others...
    2014 (English)In: Journal of Cognitive Engineering and Decision Making, ISSN 1555-3434, E-ISSN 2169-5032, Vol. 8, no 1, p. 78-97Article in journal (Refereed) Published
    Abstract [en]

    Managing complexity and uncertainty in high risk, socio-technical, systems requires people to continuously adapt. Designing resilient systems that support adaptive behaviour requires a deepened understanding of the context in which the adaptations take place, enablers for successful adaptations and their affect the overall system. Also, it requires a focus on how people actually perform, not how they are presumed to perform according to textbook situations. We propose a framework to analyse adaptive behaviour in everyday situations where systems are working near the margins of safety. The examples that underlie the framework are derived from nine focus groups with representatives working with safety related issues in different work domains, including health care, nuclear, transportation and emergency services. Further, the variety space diagram is developed as a means to illustrate how system variability, disturbances and constraints affect work performance.

    Place, publisher, year, edition, pages
    Sage Publications, 2014
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-91989 (URN)10.1177/1555343413498753 (DOI)2-s2.0-84893856937 (Scopus ID)
    Available from: 2013-05-07 Created: 2013-05-07 Last updated: 2017-12-06Bibliographically approved
    3. A case study of factor influencing role improvisation in crisis response teams
    Open this publication in new window or tab >>A case study of factor influencing role improvisation in crisis response teams
    2013 (English)In: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 15, no 1, p. 79-93Article in journal (Refereed) Published
    Abstract [en]

    Common characteristics of crisis situations are ambiguous and unplanned for events. The need for improvised roles can therefore be an imperative factor for the success of an operation. The aim of this study is to deepen the understanding of the processes taking place during improvised work ‘‘as it happens’’. A case study of a crisis management team at work is presented and provides an in-depth analysis of the information and communication flow of persons acting in improvised roles, including con- textual factors influencing the task at hand. The analysis suggests that three main factors lay behind decreased per- formance by the team when some of its members were forced to take on roles for which they lacked professional training; lack of language skills, lack of domain knowledge and insufficient organizational structure of the tasks. Based on the observations from this case study, we suggest three ways of improving a team’s performance and hence resil- ience when forced to improvise due to lack of personnel in one or more required competence areas. These are training to take on the responsibility for tasks or roles outside ones professional area of specialization, developing formal routines for changes in roles and tasks and developing and using tools and routines for information sharing.

    Place, publisher, year, edition, pages
    Springer, 2013
    Keywords
    Role improvisation, Crisis management, Resilience engineering, Organizational improvisation, Episode analysis
    National Category
    Other Engineering and Technologies
    Identifiers
    urn:nbn:se:liu:diva-80311 (URN)10.1007/s10111-011-0186-3 (DOI)000313737400010 ()
    Available from: 2012-08-23 Created: 2012-08-23 Last updated: 2017-12-07
    4. A framework for learning from adaptive performance
    Open this publication in new window or tab >>A framework for learning from adaptive performance
    2014 (English)In: Resilience engineering in practice. Vol. 2: Becoming resilient / [ed] Christopher P. Nemeth, Erik Hollnagel, Surrey: Ashgate, 2014, 2, p. 79-95Chapter in book (Other academic)
    Place, publisher, year, edition, pages
    Surrey: Ashgate, 2014 Edition: 2
    Keywords
    Political Science, Labor & Industrial Relations, Psychology, Industrial & Organizational Psychology, Technology & Engineering, Technical Writing
    National Category
    Political Science Psychology
    Identifiers
    urn:nbn:se:liu:diva-133849 (URN)9781472425157 (ISBN)
    Available from: 2017-01-12 Created: 2017-01-12 Last updated: 2019-07-05Bibliographically approved
  • 323.
    Reiss, Attila
    et al.
    German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany.
    Hendeby, Gustaf
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Stricker, Didier
    German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany.
    A Competitive Approach for Human Activity Recognition on Smartphones2013In: ESANN 2013, ESANN , 2013, p. 455-460Conference paper (Refereed)
    Abstract [en]

    This paper describes a competitive approach developed for an activity recognition challenge. The competition was defined on a new and publicly available dataset of human activities, recorded with smartphone sensors. This work investigates different feature sets for the activity recognition task of the competition. Moreover, the focus is also on the introduction of a new, confidence-based boosting algorithm called ConfAda- Boost.M1. Results show that the new classification method outperforms commonly used classifiers, such as decision trees or AdaBoost.M1.

  • 324.
    Reiss, Attila
    et al.
    German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany.
    Hendeby, Gustaf
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Stricker, Didier
    German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany.
    Towards Robust Activity Recognition for Everyday Life: Methods and Evaluation2013In: 7th International Conference on Pervasive Computing Technologies for Healthcare (PervasiveHealth), 2013, IEEE , 2013, p. 25-32Conference paper (Refereed)
    Abstract [en]

    The monitoring of physical activities under realistic, everyday life conditions - thus while an individual follows his regular daily routine - is usually neglected or even completely ignored. Therefore, this paper investigates the development and evaluation of robust methods for everyday life scenarios, with focus on the task of aerobic activity recognition. Two important aspects of robustness are investigated: dealing with various (unknown) other activities and subject independency. Methods to handle these issues are proposed and compared, a thorough evaluation simulates usual everyday scenarios of the usage of activity recognition applications. Moreover, a new evaluation technique is introduced (leave-one-other-activity-out) to simulate when an activity recognition system is used while performing a previously unknown activity. Through applying the proposed methods it is possible to design a robust physical activity recognition system with the desired generalization characteristic.

  • 325.
    Rezaei, Hengameh
    Linköping University, Department of Computer and Information Science.
    Models complexity measurement2011Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    The demand for measuring the quality aspects and need for higher maintainability and understandability of the models are increasing within the field of software engineering and management. Among these, complex models are of special interest for designers as they are more correlated to the eventual reliability of the system and therefore are considered very important. This study presents a method for measuring the complexity of existing software models in Ericsson seeking to raise the maintainability and understandability of the software engineering project in progress. A literature survey was performed in order to find a list of all potentially useful metrics. Narrowing down the long list of metrics was carried out by interviews with designers at Ericsson. Utilizing statistical data analysis based on interviews results was the next step. Beside, workshops were used for evaluating the reliability of preliminary data analysis and an empirical formula was generated for models’ complexity prediction. Metrics such as “non-self-transitions”, “transitions per states”, and “state depth” are the most important for calculating the models’ complexity score (rank) and for these metrics threshold values were set. Challenges and experiences gained in this study demonstrated the importance of incorporating user generated feedback in the empirical complexity modeling studies

  • 326.
    Ribeiro, Luis
    et al.
    CTS, Uninova, Dep. de Eng. Electrot ́ ecnica , Faculdade de Ci ˆ encias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
    Barata, Jose
    CTS, Uninova, Dep. de Eng. Electrot ́ ecnica , Faculdade de Ci ˆ encias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
    Onori, Mauro
    KTH-Production Eng.Dept., EPS Group Stockholm, Sweden.
    Hanisch, Christoph
    Festo AG & Co. KG, Esslingen, Germany.
    Hoos, Johannes
    Festo AG & Co. KG, Esslingen, Germany.
    Rosa, Rogerio
    CTS, Uninova, Dep. de Eng. Electrot ́ ecnica , Faculdade de Ci ˆ encias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
    Self-organization in automation-the IDEAS pre-demonstrator2011In: Proceedings IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society Crown Conference Centre, Melbourne, Australia, 07-10 November, 2011, IEEE , 2011, p. 2752-2757Conference paper (Refereed)
    Abstract [en]

    While the application of IT in automation gains traction, mostly motivated by the introduction of Service Orientated Approaches and Multiagent modelling, it is sometimes unclear to practitioners what is the full potential and boundaries of such concepts and technologies. The FP7 IDEAS project is focused in the design and development of Multiagent systems in a Mechatronic context which, to a great extent, implies that Mechatronic Agents must consider and respect mechanical/physical constraints while delivering the widely acknowledged (yet elusively demonstrated) characteristics that may render Agent-based control unique in respect to tolerance to disturbances, plug-ability and scalability. In this context, the present paper details the preliminary proof of concept prototype that validates the IDEAS Mechatronic Agent Architecture. The focus of this early demonstrator is to enlighten on how self-organization, inspired by the Evolvable Assembly System (EAS) Paradigm, can be exploited towards promoting the above mentioned characteristics. The main lessons learned, open points and future developing directions are distilled as the prototype is presented.

  • 327.
    Ribeiro, Luis
    et al.
    Faculty of Science and Technology, New University of Lisbon.
    Barata, José
    Faculty of Science and Technology, New University of Lisbon.
    New Shop Floor Control Approaches for Virtual Enterprises2006In: Enterprise and Work Innovation Studies, ISSN 1646-1223, Vol. 2, no 2, p. 39-52Article in journal (Refereed)
    Abstract [en]

    The virtual enterprise paradigm seems a fit response to face market instability and the volatile nature of business opportunities increasing enterprise’s interest in similar forms of networked organisations. The dynamic environment of a virtual enterprise requires that partners in the consortium own reconfigurable shop floors. This paper presents new approaches to shop floor control that meet the requirements of the new industrial paradigms and argues on work re-organization at shop floor level.

  • 328.
    Rogstadius, Jakob
    Linköping University, Department of Science and Technology.
    Visualizing the Ethiopian Commodity Market2009Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The Ethiopia Commodity Exchange (ECX), like many other data intensive organizations, is having difficulties making full use of the vast amounts of data that it collects. This MSc thesis identifies areas within the organization where concepts from the academic fields of information visualization and visual analytics can be applied to address this issue.Software solutions are designed and implemented in two areas with the purpose of evaluating the approach and to demonstrate to potential users, developers and managers what can be achieved using this method. A number of presentation methods are proposed for the ECX website, which previously contained no graphing functionality for market data, to make it easier for users to find trends, patterns and outliers in prices and trade volumes of commodieties traded at the exchange. A software application is also developed to support the ECX market surveillance team by drastically improving its capabilities of investigating complex trader relationships.Finally, as ECX lacked previous experiences with visualization, one software developer was trained in computer graphics and involved in the work, to enable continued maintenance and future development of new visualization solutions within the organization.

  • 329.
    Rosenlund, Tom
    et al.
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Engineering, Information Systems.
    Mårtensson, Erik
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Engineering, Information Systems.
    Privatpersoners upplevelse av säkerhet i molntjänster2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med studien var dels att undersöka hur privatpersoner upplever säkerheten i SaaS-baserade molntjänster, men även att undersöka hur säkerhetsrisker påverkar privat-personers tillit till molntjänsten och dess leverantör, samt om resultatet i de tidigare nämndafrågorna skiljer sig åt beroende på respondentens ålder.

    Studiens empiriska material inhämtades med kvantitativ metod, en enkätundersökningbestående av 16 frågor. Antalet respondenter var 88 personer, varav 66% var män, 27% kvinnor, och 7% angav annat kön eller inget kön. 51% var 17-24 år, 22% var 25-39 år, och 23% 40-60 år. Den kvantitativa datan analyserades kvalitativt med tidigare forskning pånärliggande områden.

    Resultatet visade att 80% av respondenterna använde någon molntjänst. 30% ansåg attmolntjänster är säkra, 20% att de ej är säkra. Resterande 50% av respondenterna hadeingen åsikt, eller ansåg att det skiljer sig mellan olika molntjänster. Generellt uppfattade deäldre respondenterna risken som större än de yngre att molntjänster kan komma att utsättasför till exempel en hackerattack. De yngre respondenterna ansåg att faktorer som moln-tjänsteleverantören har kontroll över, till exempel gränssnitt, att datan krypteras, och supportär viktigare än vad de äldre ansåg.

  • 330.
    Rosenqvist, Adam Rosenqvist
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Curovac, Dino
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Användarmedverkan vid kravinsamling: En kvalitativ studie kring positiva och negativa aspekter med användarmedverkan vid kravinsamling2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Our Bachelor Thesis in Informatic discusses the view on user-participation seen through the perspective of project managers at Swedish IT-companies. IT-systems can offer a lot of positive things in a workplace - if it is done properly after the user’s requirement. To gather user’s requirements, one needs the users to participate: user-participation. However, there is some obscurity whether user-participation in requirement gathering has a positive influence on IT-projects or not. This Bachelor Thesis in Informatic aim is to bring clearness into this problem by using our method, which contains interviewing project managers at Swedish IT-companies that have standard systems that they configure based on user requirements. Based on these interviews, we try to bring out the positive and negative aspects of user-participation in requirement gathering according to the interviewees. We also aim to find out what roles the users have during requirement gathering. We also want to know whether one can predict the outcome of user-participation in requirement gathering on beforehand. By this we refer to whether the project managers know the outcome of user-participation in requirement gathering, even before the project has started.

    Our Bachelor Thesis in Informatic brings out how project managers view user-participation in requirement gathering and the positive and negative effects of it. The project managers also get to take a stand to the possibilities and problems that are presented in theory. The Bachelor Thesis in Informatic is built upon this theory that contains mainly of scientific papers, with some elements of literature.

    A comparison between the presented theory and the interviewed project managers shows an agreed view on user-participation in requirement gathering, both in theory and in interviews. The interviewees and presented theory share the same view especially about the positive aspects with user-participation in requirement gathering. For example, they all agree on that better and more precise requirements is a positive aspect of user-participation in requirement gathering. However, the interviewees and presented theory have some differences in their point of view. One example is the view on the need of additional resource costs to have user-involvement. Regarding whether one can predict the outcome of user-participation in requirement gathering, the interviewees argue that it is possible, if one has qualified users. 

  • 331.
    Rossell, David T.
    Linköping University, Department of Management and Engineering, Project Innovations and Entrepreneurship. Linköping University, Faculty of Science & Engineering.
    Implementation of Open Innovation Strategies: A Byers-Supplier Perspective2014In: International Journal of Innovation Management, ISSN 1363-9196, E-ISSN 1757-5877, Vol. 18, no 06, p. -23, article id 1440013Article in journal (Refereed)
    Abstract [en]

    The open innovation concept has been discussed for more than a decade. However, there are relatively few studies related to implementation of open innovation. Barriers of implementation have been identified, but they are not related to the external knowledge searched for. This multiple-case study adds to current understanding of implementing open innovation strategies by focusing on the cooperation and coordination challenges when opening up for different types of supplier knowledge. Possible solutions and trade-offs between short-term benefits and long-term goals are presented that take into consideration the character of knowledge and human behavior. By applying theories such as knowledge-based view and transaction cost theories on empirical findings, different explanations are sought that bring new insights into managing open innovation.

  • 332.
    Rosén, Jakob
    et al.
    Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory. Linköping University, The Institute of Technology.
    Neikter, Carl-Fredrik
    Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory. Linköping University, The Institute of Technology.
    Eles, Petru
    Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory. Linköping University, The Institute of Technology.
    Peng, Zebo
    Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory. Linköping University, The Institute of Technology.
    Burgio, Paolo
    University of Bologna, Italy.
    Benini, Luca
    University of Bologna, Italy.
    Bus Access Design for Combined Worst and Average Case Execution Time Optimization of Predictable Real-Time Applications on Multiprocessor Systems-on-Chip2011In: 17th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS'11), Chicago, IL, USA, April 11-14, 2011., 2011Conference paper (Refereed)
    Abstract [en]

    Optimization techniques for improving the average-case execution time of an application, for which predictability with respect to time is not required, have been investigated for a long time in many different contexts. However, this has traditionally been done without paying attention to the worst-case execution time. For predictable real-time applications, on the other hand, the focus has been solely on worst-case execution time optimization, ignoring how this affects the execution time in the average case. In this paper, we show that having a good average-case delay can be important also for real-time applications for which predictability is required. Furthermore, for real-time applications running on multiprocessor systems-on-chip, we present a technique for optimizing the average case and the worst case simultaneously, allowing for a good average-case execution time while still keeping the worst case as small as possible.

  • 333.
    Rycroft-Malone, Jo
    et al.
    Bangor Univ, Wales.
    Seers, Kate
    Univ Warwick, England.
    Eldh, Ann Catrine
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences.
    Cox, Karen
    Fontys Univ Appl Sci, Netherlands.
    Crichton, Nicola
    London South Bank Univ, England.
    Harvey, Gill
    Univ Adelaide, Australia.
    Hawkes, Claire
    Univ Warwick, England.
    Kitson, Alison
    Flinders Univ S Australia, Australia.
    McCormack, Brendan
    Queen Margaret Univ Edinburgh, Scotland.
    McMullan, Christel
    Univ Birmingham, England.
    Mockford, Carole
    Univ Warwick, England.
    Niessen, Theo
    Fontys Univ Appl Sci, Netherlands.
    Slater, Paul
    Ulster Univ, North Ireland.
    Titchen, Angie
    Ulster Univ, North Ireland.
    van der Zijpp, Teatske
    Fontys Univ Appl Sci, Netherlands.
    Wallin, Lars
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences. Karolinska Inst, Div Nursing, Dept Neurobiol Care Sci and Soc, Stockholm, Sweden; Dalarna Univ, Sweden; Univ Gothenburg, Sweden.
    A realist process evaluation within the Facilitating Implementation of Research Evidence (FIRE) cluster randomised controlled international trial: an exemplar2018In: Implementation Science, ISSN 1748-5908, E-ISSN 1748-5908, Vol. 13, article id 138Article in journal (Refereed)
    Abstract [en]

    BackgroundFacilitation is a promising implementation intervention, which requires theory-informed evaluation. This paper presents an exemplar of a multi-country realist process evaluation that was embedded in the first international randomised controlled trial evaluating two types of facilitation for implementing urinary continence care recommendations. We aimed to uncover what worked (and did not work), for whom, how, why and in what circumstances during the process of implementing the facilitation interventions in practice.MethodsThis realist process evaluation included theory formulation, theory testing and refining. Data were collected in 24 care home sites across four European countries. Data were collected over four time points using multiple qualitative methods: observation (372h), interviews with staff (n=357), residents (n=152), next of kin (n=109) and other stakeholders (n=128), supplemented by facilitator activity logs. A combined inductive and deductive data analysis process focused on realist theory refinement and testing.ResultsThe content and approach of the two facilitation programmes prompted variable opportunities to align and realign support with the needs and expectations of facilitators and homes. This influenced their level of confidence in fulfilling the facilitator role and ability to deliver the intervention as planned. The success of intervention implementation was largely dependent on whether sites prioritised their involvement in both the study and the facilitation programme. In contexts where the study was prioritised (including release of resources) and where managers and staff support was sustained, this prompted collective engagement (as an attitude and action). Internal facilitators (IF) personal characteristics and abilities, including personal and formal authority, in combination with a supportive environment prompted by managers triggered the potential for learning over time. Learning over time resulted in a sense of confidence and personal growth, and enactment of the facilitation role, which resulted in practice changes.ConclusionThe scale and multi-country nature of this study provided a novel context to conduct one of the few trial embedded realist-informed process evaluations. In addition to providing an explanatory account of implementation processes, a conceptual platform for future facilitation research is presented. Finally, a realist-informed process evaluation framework is outlined, which could inform future research of this nature.Trial registrationCurrent controlled trials ISRCTN11598502.

  • 334.
    Rydergren, Clas
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    Mendoza, Ivan
    KU Leuven, L-Mob, Leuven Mobility Research Center, CIB, Leuven, Belgium;Universidad del Azuay, Cuenca, Ecuador.
    Tampère, Chris MJ
    KU Leuven, L-Mob, Leuven Mobility Research Center, CIB, Leuven, Belgium.
    Discovering Regularity in Mobility Patterns to Identify Predictable Aggregate Supply for Ridesharing2018In: Transportation Research Record, ISSN 0361-1981, E-ISSN 2169-4052, Vol. 2672, p. 213-223Article in journal (Refereed)
    Abstract [en]

    Heterogeneous data collected by smartphone sensors offer new opportunities to study a person’s mobility behavior. The mobility patterns extracted from the travel histories found in these data enable agents residing in mobile devices to model transitions between visited locations, so that upcoming trips can be predicted after observing a set of events, and assistance can be planned in advance. When several agents cooperate, the forecasted trips made by multiple users can provide a potential supply for shared mobility systems such as dynamic ridesharing. These trips must be sufficiently regular and frequent to be reliably announced as shareable trips. This paper describes a methodology to identify a predictable aggregate supply for ridesharing via mobility patterns discovered in users’ travel histories. The methodology empirically quantifies measures like the regularity and frequency of these patterns on a dataset consisting of 967 users scattered across different geographical areas. The sample exhibits high heterogeneity with respect to these measures (hence, of predictability, regardless of the prediction method). This paper shows how frequency of trip patterns decreases, while regularity increases, when additional dimensions such as departure times are added to the analysis. It was concluded that the traveler flexibility with regard to accepting less regular trips is vital to discover a larger supply. These results provide insights to develop future applications able to take advantage of this approach, to increase ridesharing rates, allowing a critical mass to be more easily attained.

  • 335.
    Röstlinger, Annie
    et al.
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Engineering, VITS - Development of Informations Systems and Work Context.
    Cronholm, Stefan
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Engineering, VITS - Development of Informations Systems and Work Context.
    Design Criteria for Public e-Services2009Conference paper (Other (popular science, discussion, etc.))
  • 336.
    Saamel, Maria
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Pham, Anh
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Kartläggning av införandet av ett nytt verksamhetsstödjande system och användarnas olika roller: En fallstudie på Norrköpings kommun2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 337.
    Sadoghi, Amirhossein
    et al.
    Linköping University, Department of Computer and Information Science, Statistics. Linköping University, The Institute of Technology.
    Burdakov, Oleg
    Linköping University, Department of Mathematics, Optimization . Linköping University, The Institute of Technology.
    Grimvall, Anders
    Linköping University, Department of Computer and Information Science, Statistics. Linköping University, The Institute of Technology.
    Piecewise Monotonic Regression Algorithm for Problems Comprising Seasonal and Monotonic Trends2011Conference paper (Other academic)
    Abstract [en]

    In this research piecewise monotonic models for problemscomprising seasonal cycles and monotonic trends are considered.In contrast to the conventional piecewise monotonicregression algorithms, our approach can efficientlyexploit a priori information about temporal patterns. Itis based on reducing these problems to monotonic regressionproblems defined on partially ordered data sets. Thelatter are large-scale convex quadratic programming problems.They are efficiently solved by the GPAV algorithm.

  • 338.
    Sadoghi, Amirhossein
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Javad, Raheel
    Linköping University, Department of Computer and Information Science, Statistics. Linköping University, The Institute of Technology.
    Yield Management for Developing Countries  airline industries.2010Conference paper (Other academic)
    Abstract [en]

    Today’s world economy is lead by trading sector, which increased the demand of different types of cargo services. Among all types of cargo, demand in “Cargo by Air” increased rapidly. Which increased the demand of low cost airlines or on another side it push the airlines to reduce their fairs. There is no doubt that Operation Research shows a potential to entrepreneurs and investment banks to invest on this venture. In this domain, revenue or yield management principles have very strong relation to form it, which can be traced back over 30 years in the airline industry. In 1970 after release of pricing law by United States government, Pacific Southwest & Southwest Airlines was the one, who first time introduced low cost airlines. Later in the mid of 1980’s, most of the US airlines introduced revenue management in response to those low-cost airlines. Many airlines used this principle and their profit margins increased exponentially. In a similar way the history of European low cost carriers began with the liberation of the flight market in the European Union. By the passage of time all most, all the developed countries adopt yield management principles to increase the profit turn margins but there is a huge gape for adopting this concept in the developing countries. This is because of lack of awareness in the public sector and also there are very few companies, who offer such services. The applicability of this technology may be varied across different developing countries and this is dependent on the level of their economic condition and market growth.

       In this research will consider the history of yield management and factors that drive the multi-pricing in the perishable product pricing. We will also review the main methodologies that are used in each of these areas also investigate new scenario that can brought opportunities for developed countries. Furthermore, will try to identify reasons why this concept failed or not that much popular in the developing countries

  • 339.
    Samii, Soheil
    Linköping University, Department of Computer and Information Science.
    Power Modeling and Scheduling of Tests for Core-based System Chips2005Independent thesis Basic level (professional degree)Student thesis
    Abstract [en]

    The technology today makes it possible to integrate a complete system on a single chip, called "System-on-Chip'' (SOC). Nowadays SOC designers use previously designed hardware modules, called cores, together with their user defined logic (UDL), to form a complete system on a single chip. The manufacturing process may result in defect chips, for instance due to the base material, and therefore testing chips after production is important in order to ensure fault-free chips.

    The testing time for a chip will affect its final cost. Thus it is important to minimize the testing time for each chip. For core-based SOCs this can be done by testing several cores at the same time, instead of testing the cores sequentially. However, this will result in a higher activity in the chip, hence higher power consumption. Due to several factors in the manufacturing process there are limitations of the power consumption for a chip. Therefore, the power limitations should be carefully considered when planning the testing of a chip. Otherwise it can be damaged during test, due to overheating. This leads to the problem of minimizing testing time under such power constraints.

    In this thesis we discuss test power modeling and its application to SOC testing. We present previous work in this area and conclude that current power modeling techniques in SOC testing are rather pessimistic. We therefore propose a more accurate power model that is based on the analysis of the test data. Furthermore, we present techniques for test pattern reordering, with the objective of partitioning the test power consumption into low parts and high parts.

    The power model is included in a tool for SOC test architecture design and test scheduling, where the scheduling heuristic is designed for SOCs with fixed- width test bus architectures. Several experiments have been conducted in order to evaluate the proposed approaches. The results show that, by using the presented power modeling techniques in test scheduling algorithms, we will get lower testing times and thus lower test cost.

  • 340.
    Sandberg, David
    Linköping University, Department of Electrical Engineering, Computer Vision.
    Model-Based Video Coding Using a Colour and Depth Camera2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this master thesis, a model-based video coding algorithm has been developed that uses input from a colour and depth camera, such as the Microsoft Kinect. Using a model-based representation of a video has several advantages over the commonly used block-based approach, used by the H.264 standard. For example, videos can be rendered in 3D, be viewed from alternative views, and have objects inserted into them for augmented reality and user interaction.

    This master thesis demonstrates a very efficient way of encoding the geometry of a scene. The results of the proposed algorithm show that it can reach very low bitrates with comparable results to the H.264 standard.

  • 341.
    Sandström Krantz, Alexander
    Linköping University, Department of Electrical Engineering.
    Node hardening verification2008Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Secure networks require each node to individually be as secure as possible. Transporting telecommunication data using IP based networks increases the need for security solutions due to increased exposure to threats. Ericsson currently provides a reference solution for carrying radio traffic over standardized Ethernet using IP, which in the current version relies on third party equipment. This equipment, and their recommended configuration, needs to be tested to ensure that the reference solution is as secure as possible.

    The main purpose of this thesis is to provide Ericsson with a template that describes how security testing of the currently recommended equipment can be carried out.

  • 342.
    Saul, Caroline Jennings
    et al.
    Eawag Swiss Fed Inst Aquat Sci and Technol, Switzerland; Karlstad Univ, Sweden.
    Gebauer, Heiko
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences. Eawag Swiss Fed Inst Aquat Sci and Technol, Switzerland; Karlstad Univ, Sweden.
    Digital Transformation as an Enabler for Advanced Services in the Sanitation Sector2018In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 10, no 3, article id 752Article in journal (Refereed)
    Abstract [en]

    People in Base of the Pyramid markets still face difficulties when it comes to sanitation. Container-based Sanitation (CBS) services represent a promising advanced sanitation service. Despite the observed outcomes of CBS services, organizations face obstacles when providing these services. To overcome these obstacles, digital transformations of these services are being carried out. We rely on multiple case studies to understand these digital transformations. Our findings highlight (1) the challenges these case organizations faced before engaging in the digital transformation, (2) their individual digital transformation pathways, and (3) a general framework for digital transformations in BoP markets.

  • 343.
    Seyyedi, Navisa
    et al.
    Urmia Univ Med Sci, Iran.
    Rahimi, Bahlol
    Urmia Univ Med Sci, Iran.
    Eslamlou, Hamid Reza Farrokh
    Urmia Univ Med Sci, Iran.
    Timpka, Toomas
    Linköping University, Department of Medical and Health Sciences, Division of Community Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Business support and Development, Department of Health and Care Development.
    Afshar, Hadi Lotfnezhad
    Urmia Univ Med Sci, Iran.
    Mobile phone applications to overcome malnutrition among preschoolers: a systematic review2019In: BMC Medical Informatics and Decision Making, ISSN 1472-6947, E-ISSN 1472-6947, Vol. 19, article id 83Article, review/survey (Refereed)
    Abstract [en]

    BackgroundMalnutrition is one of the most important reasons for child mortality in developing countries, especially during the first 5years of life. We set out to systematically review evaluations of interventions that use mobile phone applications to overcome malnutrition among preschoolers.MethodsThe review was conducted and reported according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses: the PRISMA statement. To be eligible, the study had to have evaluated mobile phone interventions to increase nutrition knowledge or enhance behavior related to nutrition in order to cope with malnutrition (under nutrition or overweight) in preschoolers. Articles addressing other research topics, older children or adults, review papers, theoretical and conceptual articles, editorials, and letters were excluded. The PubMed, Web of Science and Scopus databases covering both medical and technical literature were searched for studies addressing preschoolers malnutrition using mobile technology.ResultsSeven articles were identified that fulfilled the review criteria. The studies reported in the main positive signals concerning the acceptance of mobile phone based nutritional interventions addressing preschoolers. Important infrastructural and technical limitations to implement mHealth in low and middle income countries (LMICs) were also communicated, ranging from low network capacity and low access to mobile phones to specific technical barriers. Only one study was identified evaluating primary anthropometric outcomes.ConclusionsThe review findings indicated a need for more controlled evaluations using anthropometric primary endpoints and put relevance to the suggestion that cooperation between government organizations, academia, and industry is necessary to provide sufficient infrastructure support for mHealth use against malnutrition in LMICs.

  • 344.
    Shuaib, Muhammad
    Linköping University, Department of Electrical Engineering.
    Two-Tone PLL  for On-Chip Test In 90nm-Technology2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this report the two-tone PLL circuit intended for on-chip test of RF blocks is presented. The primary application is the third order intermodulation test (TOI), vital for RF front-ends. If the spectral analysis can also be completed by DSP available on the chip or on board, it provides a built in self-test (BiST) which can replace costly test instrumentation (ATE). The advantage of the designed two-tone PLL is that it practically prevents the locking effect while keeping the two oscillation frequencies close. Also by careful design the possible intermodulation distortion of the two-tone stimulus can be avoided.

    The two-tone PLL has been designed and verified at the system level using Verilog-A models in Cadence TM. Besides, two building blocks of the PLL were implemented at the circuit level in 90nm CMOS technology. The obtained results are promising in terms of a practical two-tone BiST implementation.

  • 345.
    Sivatki, Ghennadii
    Linköping University, Department of Computer and Information Science.
    Synthesis-driven Derivation of Process Graphs from Functional Blocks for Time-Triggered Embedded Systems2005Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    Embedded computer systems are used as control systems in many products, such as VCRs, digital cameras, washing machines, automobiles, airplanes, etc. As the complexity of embedded applications grows and time-to-market of the products they are used in reduces, designing reliable systems satisfying multiple require-ments is a great challenge. Successful design, nowadays, cannot be performed without good design tools based on powerful design methodologies. These tools should explore different design alternatives to find the best one and do that at high abstraction levels to manage the complexity and reduce the design time.

    A design is specified using models. Different models are used at different de-sign stages and abstraction levels. For example, the functionality of an application can be specified using hierarchical functional blocks. However, for such design tasks as mapping and scheduling, a lower-level flat model of interacting processes is needed. Deriving this model from a higher-level model of functional blocks is the main focus of this thesis. Our objective is to develop efficient strategies for such derivations, aiming at producing a process graph specification, which helps the synthesis tasks to find schedulable implementations. We proposed several strategies and evaluated them experimentally.

  • 346.
    Sjösten, Christian
    Linköping University, Department of Computer and Information Science. Linköping University, Faculty of Arts and Sciences.
    Rutiner, rapportering och system avseende incidenthantering på Saab Aerospace2003Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Säkerhetsincidenter kan vara av många olika typer, från IT-relaterade incidenter till inci-denter som påverkar exempelvis brandskyddet. På något sätt måste dessa incidenter tas om hand. Detta kan ske genom manuella procedurer eller med stöd av databaserade incident-hanteringssystem. Denna studie är utförd på Saab Aerospace i Linköping och behandlar primärt företagets hantering av incidenter. Jag har undersökt hur företaget bedriver säker-hetsarbete och hanterar säkerhetsincidenter både vad avser informationssäkerhet som jag anser är nära associerat med sekretess av information, men även säkerhet som är associerad till företagets anläggning (skalskydd).

    Företaget har planer på att implementera ett informationssystembaserat stöd för incident-hanteringen, ett incidenthanteringssystem. Det primära syftet med studien var att undersöka de olika intressenternas inställning till ett sådant system för att se om detta var något som efterfrågades eller om nuvarande hantering ansågs tillfredsställande.

    Säkerhetstänkandet inom företaget är högt, vilket till stor del beror på företagets känsliga inriktning med utveckling av bland annat militära stridsplan, och delar till dessa. Av den anledningen blir säkerhetsmomenten för att minimera risken för incidenter av betydelse. Viktiga moment som det arbetas med är incidenthantering, informationsklassning, loggning kontinuitetsplanering och säkerhetskopiering.

    Vad som framkom i studien var att nuvarande incidenthanteringsrutiner fungerar ostandar-diserat, osystematiskt och decentraliserat. Detta svar är dock generellt och några intressen-ter anser att det för dem fungerar tillfredsställande även om dessa också anser att det finns aspekter av incidenthanteringen som borde ses över. Med ostandardiserat menas att proce-durer varierar mycket mellan olika verksamhetsområden. Med decentraliserat avses att det inte finns någon övergripande funktion för sammanställning och hantering av incidenter, det är således ingen på företaget som har helhetsbilden av incidenthanteringen.

    Behov av att åtgärda ovannämnda problem finns, ett incidenthanteringssystem skulle såle-des kunna vara en möjlig lösning. Intressenterna är emellertid oense om att ett gemensamt incidenthanteringssystem är något som eftersträvas. Det framförs krav att ett sådant system skulle vara väl sektionerat till de olika verksamhetsområdena för att medarbetare endast ska kunna komma åt relevant information, något som även är bra ur en sekretess och behörig-hetsaspekt. Incidenthanteringssystemet skulle sedan kunna ha en övergripande funktion för sammanställning av incidentrapporter från de olika intressenternas verksamhetsområden.

  • 347.
    Sjöstrand, Johan
    Linköping University, Department of Electrical Engineering.
    A communication system for a pluggable game engine2007Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    This thesis documents the development of a communication system that is part of a pluggable game engine for a course in advanced game programming. It covers some techniques and problems in network game programming, a description of the developed system and an example of how the system is used in a demo of the game engine.

  • 348.
    Skoglund, Jesper
    et al.
    Linköping University, Department of Computer and Information Science.
    Vikström, Lukas
    Linköping University, Department of Computer and Information Science.
    Automating the process of dividing a map image into sections: Using Tesseract OCR and pixel traversing2018Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This paper presents an algorithm with the purpose of automatically dividing a simple floor plan into sections. Sections include names, size and location on the image, all of which will be automatically extracted by the algorithm as a step of converting a simple image into an interactive map. The labels for each section utilizes tesseract-OCR wrapper tesseractJS to extract text and label location. In regards to section borders pixel traversing is employed coupled with CIE76 for color comparison which results in the discovery of size and location of the section. Performance of the algorithm was measured on three different maps using metrics such as correctness, quality, completeness, jaccard index and name accuracy. The metrics showed the potential of such an algorithm in terms of automating the task of sectioning an image. With results ranging between lowest percentage of 48% and highest of 100% on three different maps looking at correctness, quality, completeness, average jaccard index and average name accuracy per map.

  • 349.
    Skågeby, Jörgen
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, The Institute of Technology.
    Public and Non-Public Gifting on the Internet2006Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis contributes to the knowledge of how computer-mediated communication and information sharing works in large groups and networks. In more detail, the research question put forward is: in large sharing networks, what concerns do end-users have regarding to whom to provide material? A theoretical framework of gift-giving was applied to identify, label and classify qualitative end-user concerns with provision. The data collection was performed through online ethnographical research methods in two large sharing networks, one music-oriented and one photo-oriented. The methods included forum message elicitation, online interviews, application use and observation. The result of the data collection was a total of 1360 relevant forum messages. A part from this there are also 27 informal interview logs, field notes and samples of user profiles and sharing policies. The qualitative analysis led up to a model of relationships based on the observation that many users experienced conflicts of interest between various groups of receivers and that these conflicts, or social dilemmas, evoked concerns regarding public and non-public provision of material. The groups of potential recipients were often at different relationship levels. The levels ranged from the individual (ego), to the small group of close peers (micro), to a larger network of acquaintances (meso) to the anonymous larger network (macro). It is argued that an important focal point for analysis of cooperation and conflict is situated in the relations between these levels. Deepened studies and analysis also revealed needs to address dynamic recipient groupings, the need to control the level of publicness of both digital material and its metadata (tags, contacts, comments and links to other networks) and that users often refrained from providing material unless they felt able to control its direction. A central conclusion is that public and non-public gifting need to co-emerge in large sharing networks and that non-public gifting might be an important factor for the support of continued provision of goods in sustainable networks and communities.

    List of papers
    1. Gifting Technologies
    Open this publication in new window or tab >>Gifting Technologies
    2004 (English)In: First Monday, ISSN 1396-0466, E-ISSN 1396-0466, Vol. 9, no 12Article in journal (Refereed) Published
    Abstract [en]

    File–sharing has become very popular in recent years, but for many this has become synonymous with file–getting. However, there is strong evidence to suggest that people have strong giving (or gifting) needs. This evidence suggests an opportunity for the development of gifting technologies — and it also suggests an important research question and challenge: what needs and concerns do gifters have and what technologies can be developed to help them? In this paper, we discuss the existing literature on gifting, report on an initial study of gifting in an online sharing community, and suggest some ways the study results can inform future research into gifting desires — as well as the design of specific gifting technologies.

    Place, publisher, year, edition, pages
    First Monday, 2004
    Keywords
    Gifts, P2P, File-Sharing, Open Source
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13301 (URN)10.5210/fm.v0i0.1457 (DOI)
    Available from: 2008-05-21 Created: 2008-05-21 Last updated: 2017-12-13Bibliographically approved
    2. File-Sharing Relationships: conflicts of interest in online gift-giving
    Open this publication in new window or tab >>File-Sharing Relationships: conflicts of interest in online gift-giving
    2005 (English)In: Proceedings of the 2nd International Conference on Communities and Technologies, 2005, p. 111-127Conference paper, Published paper (Other academic)
    Abstract [en]

    This paper suggests a relationship model for describing, analyzing and foreseeing conflicts of interest in file-sharing networks. The model includes levels of relationship ranging from the individual (ego), to the small group of close peers (micro), to a larger network of acquaintances (meso) to the anonymous larger network (macro). It is argued that an important focal point for analysis of cooperation and conflict is situated in the relations between these levels. Three examples of conflicts from a studied file-sharing network are presented. Finally, the relationship model is discussed in terms of applicability to other domains, recreational as well as professional.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13302 (URN)10.1007/1-4020-3591-8_7 (DOI)978-1-4020-3590-6 (Print) 978-1-4020-3591-3 (Online) (ISBN)
    Available from: 2008-05-21 Created: 2008-05-21 Last updated: 2010-01-13
    3. Semi-Public End-user Content Contributions: a case-study of concerns and intentions in online photo-sharing
    Open this publication in new window or tab >>Semi-Public End-user Content Contributions: a case-study of concerns and intentions in online photo-sharing
    2008 (English)In: International journal of human-computer studies, ISSN 1071-5819, E-ISSN 1095-9300, Vol. 66, no 4, p. 287-300Article in journal (Refereed) Published
    Abstract [en]

    As social networks and rich media sharing are increasingly converging, end-user concerns regarding to whom, how and why to direct a certain digital content emerge. Between the pure private contribution and the pure public contribution exists a large research and design space of semi-public content and relationships. The theoretical framework of gift-giving correlates to semi-public contributions in that it envelopes social relationships, concerns for others and reciprocity, and was consequently adopted in order to reveal and classify qualitative semi-public end-user concerns with content contribution. The data collection was performed through online ethnographic methods in a large photo-sharing network. The main data-collection method used was forum message elicitation, combined with referential methods such as interviews and application observation and usage. The analysis of data resulted in descriptions concerning end-user intentions to address dynamic recipient groupings, the intentions to control the level of publicness of both digital content and its related social metadata (tags, contacts, comments and links to other networks) and the conclusion that users often refrained from providing material unless they felt able to control its direction.

    Place, publisher, year, edition, pages
    Elsevier, 2008
    Keywords
    Rich social networks; Multimedia content; Online ethnography; Flickr; Gift-giving; Social metadata
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13304 (URN)10.1016/j.ijhcs.2007.10.010 (DOI)
    Note

    The previous status of this article was Manuscript and the working title was Non-Public Gifting on the Internet: a case-study of end-user concerns in photo-sharing.

    Available from: 2008-05-21 Created: 2008-05-21 Last updated: 2017-12-13Bibliographically approved
  • 350.
    Sommer, Gerald
    et al.
    Cognitive Systems Group, Christian-Albrechts-University, Kiel, Germany.
    Granlund, Gösta
    Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
    Granert, Oliver
    Cognitive Systems Group, Christian-Albrechts-University, Kiel, Germany.
    Krause, Martin
    Cognitive Systems Group, Christian-Albrechts-University, Kiel, Germany.
    Nordberg, Klas
    Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
    Perwass, Christian
    Cognitive Systems Group, Christian-Albrechts-University, Kiel, Germany.
    Söderberg, Robert
    Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
    Viksten, Fredrik
    Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
    Chavarria, Marco
    Cognitive Systems Group, Christian-Albrechts-University, Kiel, Germany.
    Information Society Technologies (IST) programme: Final Report2005Report (Other academic)
    Abstract [en]

    To summarize, the VISATEC project was initiated to combine the specific scientific competencies of the research groups at CAU and LiU, together with the industrial view on vision applications, in order to develop novel, more robust algorithms for object localization and recognition. This goal was achieved by a two-fold strategy, whereby on the one hand more robust basic algorithms were developed and on the other hand a method for the combination of these algorithms was devised. In particular, the latter confirmed the consortium’s belief that an appropriate combination of a number of basic algorithms will lead to more robust results than a single method could do.

    However, the multi-cue integration is just one algorithm of many that were developed in the VISATEC project. All developed algorithms are described in some detail in the remainder of this report. An overview of the respective publications can be found in appendix.

    Despite some difficulties that were encountered on the way, we as a consortium feel that the VISATEC project was a success. That this is not only our opinion reflects in the outcome of the final review. We believe that the work that was done during these three years of the project, not only furthered our understanding of the matter, but also added to the knowledge within the scientific community and showed new possibilities for industrial vision applications.

456789 301 - 350 of 408
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf