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  • 301.
    Kling, Mattias
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Developing a Source Criticism Learning Activity for a Digital Learning Environment in History2015Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Source criticism is an important part of the national curriculum in the history subject in middle grade schools. This master thesis presents the development of a digital learning activity for teaching students about source criticism concepts. The learning activity was developed by first researching the history curriculum and how source criticism is taught within the subject. A conceptual design was drafted based on these findings and the design of an existing framework for teaching students within the history subject. The existing framework, and the developed learning activity, is based on learning-by-teaching implemented in the form of a teachable agent. The teachable agent act as a tutee that students have to teach themselves, increasing students' motivation and learning. By teaching the agent, students improve their own learning. The final implementation of the activity is integrated into both the technical framework and the narrative of the existing environment.

  • 302.
    Klockare, Sofi
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Responsive design in Windows 8 applications2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Responsive design is a common expression at the web today. This thesis was about learning about responsive web design in order to apply it to Windows 8 applications created in C# and XAML. The purpose of this thesis was to learn if responsive design can be used in such applications. This was done by first learning about responsive design through a literature study about responsive web design and then specifying responsive application design. How responsive design can be used in applications was found through research and creation of an example application. No literature was found about responsive design for Windows 8 applications in C# and XAML and therefore most of the results came from own ideas and partly solutions found on different forums. The thesis was performed at Infor in Kista. The example application was a social application which was connected to a social web service developed by Infor.

    Responsive web design is a technique used for making webpages adapt to the size and resolution of the viewport. This is done by creating a structured, fluid layout by using a flexible grid and flexible images. Media queries are used to set up different states for presenting the page in different ways for different sizes and resolutions of the viewport. In the different states parts of the content can for example be hidden or styled. The number of columns of information can also be set to adapt to make the page easier to view.

    Responsive design for applications should make the layout of the application adapt to fit the application window of the device used depending on its resolution. One way to specify a responsive design for Windows 8 applications could be to create only one application which could be used on all different Windows 8 platforms, such as phones, tablets and computers. It is probably not possible today to create this one application for different Windows 8 platforms. Another way of specifying responsive design for application is to create a responsive user interface which could be shared and used in the different Windows 8 applications. The latter was the chosen definition for this thesis.

    The scope of this thesis was limited to only research for responsive design in Windows Store apps and Windows Phone 8 applications. Windows Phone 8 applications are applications used on smartphones with Windows Phone 8 as operating system while Windows Store applications are used on computers with Windows 8 as operating system. Other Windows 8 devices were not included in this thesis.

    The final conclusion of this thesis was that although it is complicated to use responsive application design it can be used for most of the user interface. A responsive user interface for the applications can be created separately, but some parts of the application pages cannot be shared between the different platforms. This results in a mostly responsive sharable user interface.

  • 303.
    Koch, Sabine
    et al.
    Health Informatics Centre, Department of Learning, Informatics, Management and Ethics, Karolinska Institutet, Stockholm, Sweden.
    Vimarlund, Vivian
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology. Center of Information Technology and Information Systems, Jönköping International Business School, Jönköping, Sweden.
    Critical Advances in Bridging Personal Health Informatics and Clinical Informatics2012In: IMIA Yearbook of Medical Informatics, ISSN 0943-4747, Vol. 7, p. 48-55Article in journal (Other academic)
    Abstract [en]

    Objectives: To provide a survey over significant developments in the area of linking personal health informatics and clinical informatics, to give insights into critical advances and to discuss open problems and opportunities in this area. Methods: A scoping review over the literature published in scientific journals and relevant conference proceedings in the intersection between personal health informatics and clinical informatics over the years 2010 and 2011 was performed. Results: The publications analyzed are related to two main topics, namely "Sharing information and collaborating through personal health records, portals and social networks" and "Integration of personalhealth systems with clinical information systems". For the first topic, results are presented according to five different themes: "Patient expectations and attitudes", "Real use experiences", "Changes for care providers", "Barriers to adoption" and "Proposed technical infrastructures". For the second topic, two different themes were found, namely "Technical architectures and interoperability“"and "Security, safety and privacy issues". Discussion: Results show a number of gaps between the information needs of patients and the information care provider organizations provide to them as well as the lack of a trusted technical, ethical and regulatory framework regarding information sharing. Conclusions: Despite recent developments in the areas of personal health informatics and clinical informatics both fields have diverging needs. To support both clinical work processes and empower patients to effectively handle self-care, a number of issues remain unsolved. Open issues include privacy and confidentiality, including trusted sharing of health information and building collaborative environments between patients, their families and care providers. There are further challenges to meet around health and technology literacy as well as to overcome structural and organizational barriers. Frameworks for evaluating personal health informatics applications and pervasive health technology are needed to build up an evidence basis.

  • 304.
    Kofali, Ozgur
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Development of a Game Portal for Web-based Motion Games2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The objective of this thesis project focuses on designing and implementing a game portal for web-based motion games whilst achieving high usability. Many systems lack the creativ- ity to design web-usability with all the technical requirements and this study addresses this problem by implementing a front-end system that uses agile methodology with competitive analysis and consumes the back-end system with RESTful architecture by using AngularJS web application framework. Users were involved in the implementation process repetitively and the usability test was done with think aloud protocol and System Usability Scale which involves a questionnaire on paper. It was concluded that a clear and interactive navigation bar made it very useful for users to hover through the website. Having the notifications fixed on the upper right side of the navigation bar made them easily perceived by the users and including all user-related functions under username helped the user reach them easily. It was also concluded that modal view prevented page reloading by gathering users, attention at one point. Adding visual feedback functions such as highlighting the hovered or clicked link were appreciated by the users. 

  • 305.
    Kottamasu, V.L.Phanikumar
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    User interaction of one-dimensional panoramic images for iPod Touch2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Modern handheld devices such as smart phones and tablets have become popular for capturing and viewing panoramic images, but navigation in these devices is a challenging task due to small screen size. In this thesis work, investigation is done for similarities and differences between two user interaction techniques of one-dimensional cubical panorama images. This work is carried out on a fourth generation Apple iPod Touch. The first user interaction technique swipe (drag-based panning) is developed using touch-gestures, while the second technique look-around (device-orientation panning) is developed using motion-sensors such as gyroscope and accelerometer for device-orientation. Both these techniques were implemented for touch-screen devices for an angle of 360 degrees.    

    In the swipe technique, the navigation is done by using finger movements on the screen, while in the look-around based panning technique the navigation is done by moving the device direction physically in space through an angle of 360 degrees. The experiments were conducted on 20 participants for the two panning techniques. The results have shown that the look-around based panning technique offers a better user interaction compared to swipe based panning technique. Look-around based panning technique is natural and more free to move physically in space. Swipe based panning technique is easy to use in some situations and it does not require any physical space to move around the system.  

  • 306.
    Kovordanyi, Rita
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Controlled exploration of alternative mechanisms in cognitive modeling2000In: Twenty-Second Annual Meeting of the Cognitive Science Society,2000, Mahwah, NJ: Lawrence Erlbaum Associates , 2000, p. 280-285Conference paper (Refereed)
  • 307.
    Kovordanyi, Rita
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Is mental imagery symbolic?: Exploratory simulations in an interactive activation model1998In: Proceedings of the 2nd EuropeanConference on Cognitive Modelling, 1998, Nottingham: Nottingham University Press, 1998, p. 197-Conference paper (Refereed)
  • 308.
    Kovordanyi, Rita
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    When will adaptive support systems be user-adaptive? The case of adaptive cruise control.2005In: AAAI Spring Symposium on Challenges to Decision Support in a Changing World.,2005, 2005Conference paper (Refereed)
    Abstract [en]

    Advanced driver support systems are often used by drivers as comfort systems. Drivers tend to adapt their behavior to the increased safety margins created by the system by driving at higher speeds and paying less attention to driving. From a traffic safety perspective, it is therefore important that driver support systems can adapt their support to how drivers actually use the system. We propose a way to mitigate drivers- misuse of the safety margins created by the system by employing an adaptive support policy that is less predictable for the driver. We conclude by describing ongoing work, were the safety effect of such an adaptive support policy is empirically studied.

  • 309.
    Kovordanyi, Rita
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Alm, Torbjörn
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Industrial Ergonomics.
    Ohlsson, Kjell
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Industrial Ergonomics.
    Night-vision display unlit during uneventful periods may improve traffic safety2006In: 2006 Intelligent Vehicles Symposium sponsored by the IEEE Intelligent Transportation Systems Society,2006, IEEE conference proceedings, 2006, p. 282-287Conference paper (Refereed)
    Abstract [en]

    It is always uncertain if a new assistance system enhances traffic safety or not: empirical studies indicate that driving style may deteriorate when the driver experiences the increased safety margin created by an advanced driver assistance system. To minimize this negative effect on driving style, we redesigned a night vision system so that it appeared differently to the driver: we let the system's head-up display be turned off during operation, to be lit up only when the system detected an obstacle (e.g., a pedestrian or animal) on the road ahead. This presentation style was compared in a simulator study to the traditional solution of constantly lit-up display. The results indicate that drivers reacted more reliably (showed less variance in reaction times) using the new system, which implies that the lighting up of the IR-display constituted an effective warning. Also, drivers to a greater extent drove at normal (slower) speeds when using the re-designed system. More generally, systems offering discontinuous support (i.e. only in critical situations) may have less of a negative effect on driving style, as their presence is not felt as vividly by the driver

  • 310.
    Kovordanyi, Rita
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Eriksson, Henrik
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Advanced Decision Support in Simulator-Based Training for Crisis Management2013Conference paper (Refereed)
    Abstract [en]

    This paper describes the development of a decision support and knowledge management system as part of an EU FP7 funded project, CRISIS. In its final form, the decision support and knowledge management system was implemented as an Android app that uses Esper for complex event processing. The reasoning engine of the decision support and knowledge management system is backed with an ontology and knowledge representation implemented in Topic Maps.

  • 311.
    Kovordanyi, Rita
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Ohlsson, Kjell
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Industrial Ergonomics.
    Alm, Torbjörn
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Industrial Ergonomics.
    Dynamically Deployed Support as a Potential Solution to Negative Behavioral Adaptation2005In: 2005 IEEE Intelligent Vehicles Symposium Proceedings, 2005, IEEE conference proceedings, 2005, p. 613-618Conference paper (Refereed)
    Abstract [en]

    Advanced driver assistance systems are designed to make driving easier that is, to alleviate the driver's workload, and to increase traffic safety. However, traffic safety is affected by negative behavioral adaptation, meaning that drivers tend to increase speed and pay less attention to driving when supported by an advanced assistance system. We relate behavioral adaptation to reinforcement learning at a subconscious level, and propose that driver assistance is dynamically varied within predetermined safety limits. The aim of employing a dynamic assistance policy is to prevent the driver from noticing a constant improvement in vehicle handling. We conclude by describing ongoing work for empirically evaluating an improved lane departure warning system that uses a dynamic assistance policy.

  • 312.
    Kovordanyi, Rita
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Ohlsson, Susanna
    Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory. Linköping University, The Institute of Technology.
    Toward adaptive support: Modelling drivers' allocation of attention2002Conference paper (Refereed)
    Abstract [en]

    Driver distraction and inattention are major contributing factors in traffic accidents (cf., e.g., Najm et al, 1995). Some of these accidents might be avoided in the future if drivers’ (miss)allocation of attention could be detected, and the driver be prompted toward key events in the traffic scene. Our objective is to develop a cognitively based driver model where drivers’ allocation of attention can be simulated for diagnostic purposes. As a first step, we present a connectionist model framework implemented in PDP++. This framework is based on the notion that focusing attention on a visual object is closely coupled with an intention to act on that object. Using our model, we want to continuously assess if the driver can maintain a general preparedness to act, and hence detect unexpected events, or if he/she is overloaded by non–driving–related tasks. In a first step, we intend to study how attention can be allocated to subtasks in the model, to find out to what extent multiple tasks can be parallelized by drivers. For further develop-ments on this project, visit http://www.ida.liu.se/~ritko.html

  • 313.
    Kristensson, Per Ola
    et al.
    University of Cambridge.
    Dahlbäck, Nils
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Anundi, Daniel
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Bjornstad, Marius
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Gillberg, Hanna
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Haraldsson, Jonas
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Martensson, Ingrid
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Nordvall, Mathias
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Stahl, Josefine
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Computer and Information Science, Human-Centered systems.
    An Evaluation of Space Time Cube Representation of Spatiotemporal Patterns2009In: IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS, ISSN 1077-2626, Vol. 15, no 4, p. 696-702Article in journal (Refereed)
    Abstract [en]

    Space time cube representation is an information visualization technique where spatiotemporal data points are mapped into a cube. Information visualization researchers have previously argued that space time cube representation is beneficial in revealing complex spatiotemporal patterns in a data set to users. The argument is based on the fact that both time and spatial information are displayed simultaneously to users, an effect difficult to achieve in other representations. However, to our knowledge the actual usefulness of space time cube representation in conveying complex spatiotemporal patterns to users has not been empirically validated. To fill this gap, we report on a between-subjects experiment comparing novice users error rates and response times when answering a set of questions using either space time cube or a baseline 2D representation. For some simple questions, the error rates were lower when using the baseline representation. For complex questions where the participants needed an overall understanding of the spatiotemporal structure of the data set, the space time cube representation resulted in on average twice as fast response times with no difference in error rates compared to the baseline. These results provide an empirical foundation for the hypothesis that space time cube representation benefits users analyzing complex spatiotemporal patterns.

  • 314.
    Kristiansson (Forsblad), Mattias
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    The case of cognitive ecology for cognitive processes in everyday life situations2013In: Cooperative Minds: Social Interaction and Group Dynamics: Proceedings of the 35th Annual Meeting of the Cognitive Science Society, Berlin, Germany, July 31-August 3, 2013 / [ed] Markus Knauff, Michael Pauen, Natalie Sebanz and Ipke Wachsmuth, Berlin: Cognitive Science Society, Inc., 2013, p. 2778-2783Conference paper (Refereed)
    Abstract [en]

    Cognitive ecology is a term that has been used in environments that are more tightly coupled and purpose specific than environments of everyday life. In this paper I consider cases from a cognitive ethnography of older adults.These cases show the analytical use of understanding the diachronic and synchronic cognitive ecology in which cognitive processes of everyday life occur. Specifically I discuss how the social and physical ecology and changes in these can shape goals, the use of cognitive artifacts and theuse of other cognitive resources in agent environments that are not as purpose created and not as tightly coupled as environments of previous studies in this field.

  • 315.
    Kristiansson (Forsblad), Mattias
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Wiik, Richard
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Prytz, Erik
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences. Sics East Swedish ICT AB.
    Bodily orientations and actions as constituent parts of remembering objects and intentions before leaving home2014In: Sensoria: A Journal of Mind, Brain, and Culture, ISSN 2203-8469, Vol. 10, no 1, p. 21-27Article in journal (Refereed)
    Abstract [en]

    In this article we report an exploratory video-based analysis of bodily actions - specifically head movements and bodily orientations - of two older adults (+65) in their everyday life, as they are about to leave their homes. We show that action patterns can serve an adaptive function to monitor the physical surrounding of objects and spaces, and we argue that these adaptive functions assist prospective memory processes. First, we found that ongoing activities, some partially unrelated to the activity of leaving home, coupled with the structure of the physical environment could assist the participants in remembering intentions before leaving home. Second, we found that participants attended to, and therefore stayed in control of, important spaces and objects through targeted and redundant scanning of such important spaces. In the context of previous research on the effects of cognitive aging, we hypothesize that these bodily action patterns coupled with the efficient shaping of spaces can be important for the general older population to compensate for a decline in prospective memory ability.

  • 316.
    Kristing, Martin
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Modell för att jobba med användbarhet i ett affärssystem2012Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Det är viktigt att bygga affärssystem med hög användbarhet, så att användarna ska kunna arbeta med affärssystemet så effektivt som möjligt. Rapporten beskriver en grundmodell, där modellen är ett arbetssätt för att höja nivån på användbarheten i en produkt.

    Modellen består av fyra steg. Första steget är att göra en PACT-analys för att få bakgrundsinformation om hur systemet kommer att användas. Andra steget är att skapa olika scenarier (beskrivning av uppgifter som användaren skulle kunna utföra med systemet), samt strukturera information med hjälp av en ”Sequence model”. Tredje steget är att använda informationen från scenarierna och ”Sequence model” för att göra en prototyp. Fjärde steget är utvärdera prototypen med användaren, genom att göra ” think-out-loud testing”.

    Rapporten beskriver också ett verkligt test av grundmodellen. Grundmodellen testas genom att arbeta med att förbättra användbarheten på en produkt som är under utveckling. Produkten heter Rental Counter och är en applikation i Infors affärsystem M3. Användbarheten på produkten analyserades och designförslag togs fram på hur man skulle kunna minimera några av användbarhetsproblemen.Grundmodellen analyserade för att se hur den passade in med utvecklings-processerna på Infor.

    Grundmodellen skall kunna användas vid arbetet för att ta fram en designspecifikation till ett nytt processflöde. Vid utvecklingsfasen av ett nytt processflöde finns det behov av användbarhetstestning för att säkerhetsställa att flödet har hög användbarhet.

    Affärsystemet M3 ska vara väldigt generellt och konfigurerbart så man vill inte anpassa systemet efter en specifik användargrupp. Därför kan det bli det problematiskt att använda användbarhetsbarhetstestning i utvecklingsmetodiken. På Infor behöver man hitta ett sätt att få feedback från användaren tidigt under utveckling, användbarhetstestning är ett sätt. Det gäller bara att hitta i vilka situationer som det är lämpligt.

    I framtiden om infor ska kunna utveckla ett affärsystem som är intuitivt och som användare ska kunna jobba effektivt med utan träning, så behöver utvecklarna få mer input från användarna tidigt under utvecklingen av ett flöde.

  • 317.
    Kuhlmann, Marco
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Linköping: Cubic-Time Graph Parsing with a Simple Scoring Scheme2014In: Proceedings of the 8th International Workshop on Semantic Evaluation (SemEval 2014), Association for Computational Linguistics, 2014, p. 395-399Conference paper (Refereed)
    Abstract [en]

    We turn the Eisner algorithm for parsing to projective dependency trees into a cubic-time algorithm for parsing to a restricted class of directed graphs. To extend the algorithm into a data-driven parser, we combine it with an edge-factored feature model and online learning. We report and discuss results on the SemEval-2014 Task 8 data sets (Oepen et al., 2014).

  • 318.
    Kuhlmann, Marco
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Jonsson, Peter
    Linköping University, Department of Computer and Information Science, Software and Systems. Linköping University, Faculty of Science & Engineering.
    Parsing to Noncrossing Dependency Graphs2015In: Transactions of the Association for Computational Linguistics, ISSN 2307-387X, Vol. 3, p. 559-570Article in journal (Refereed)
    Abstract [en]

    We study the generalization of maximum spanning tree dependency parsing to maximum acyclic subgraphs. Because the underlying optimization problem is intractable even under an arc-factored model, we consider the restriction to noncrossing dependency graphs. Our main contribution is a cubic-time exact inference algorithm for this class. We extend this algorithm into a practical parser and evaluate its performance on four linguistic data sets used in semantic dependency parsing. We also explore a generalization of our parsing framework to dependency graphs with pagenumber at most $k$ and show that the resulting optimization problem is NP-hard for k ≥ 2.

  • 319.
    Kuhlmann, Marco
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Kanazawa, MakotoNational Institute of Informatics, Japan.Kobele, GregoryUniversity of Chicago, USA.
    MoL 2015: the 14th meeting on the Mathematics of language. Proceedings, July 25-26, Chicago, USA2015Conference proceedings (editor) (Refereed)
    Abstract [en]

    This volume contains eleven regular papers and  two invited papers. The regular papers, which were selected by the Program Committee from a total of twenty-two submissions, feature a broad variety of work on mathematics of language, including phonology, formal language theory, natural language semantics, and language learning. The invited papers are presented by two distinguished researchers in the field: David McAllester, Professor and Chief Academic Officer at the Toyota Technological Institute at Chicago, and Ryo Yoshinaka, Assistant Professor at Kyoto University.

  • 320.
    Kuhlmann, Marco
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Koller, Alexander
    University of Potsdam, Germany.
    Satta, Giorgio
    University of Padua, Italy.
    Lexicalization and Generative Power in CCG2015In: Computational linguistics - Association for Computational Linguistics (Print), ISSN 0891-2017, E-ISSN 1530-9312, Vol. 41, no 2, p. 215-247Article in journal (Refereed)
    Abstract [en]

    The weak equivalence of Combinatory Categorial Grammar (CCG) and Tree-Adjoining Grammar (TAG) is a central result of the literature on mildly context-sensitive grammar formalisms. However, the categorial formalism for which this equivalence has been established differs significantly from the versions of CCG that are in use today. In particular, it allows restriction of combinatory rules on a per grammar basis, whereas modern CCG assumes a universal set of rules, isolating all cross-linguistic variation in the lexicon. In this article we investigate the formal significance of this difference. Our main result is that lexicalized versions of the classical CCG formalism are strictly less powerful than TAG.

  • 321.
    Kuhlmann, Marco
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Oepen, Stephan
    Department of Informatics, University of Oslo.
    Towards a Catalogue of Linguistic Graph Banks2016In: Computational linguistics - Association for Computational Linguistics (Print), ISSN 0891-2017, E-ISSN 1530-9312, Vol. 42, no 4, p. 819-827Article in journal (Refereed)
    Abstract [en]

    Graphs exceeding the formal complexity of rooted trees are of growing relevance to much NLP research. Although formally well understood in graph theory, there is substantial variation in the types of linguistic graphs, as well as in the interpretation of various structural properties. To provide a common terminology and transparent statistics across different collections of graphs in NLP, we propose to establish a shared community resource with an open-source reference implementation for common statistics.

  • 322.
    Kuhlmann, Marco
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Satta, Giorgio
    University of Padua.
    A New Parsing Algorithm for Combinatory Categorial Grammar2014In: Transactions of the Association for Computational Linguistics, ISSN 2307-387X, Vol. 2, no 2014, p. 405-418Article in journal (Refereed)
    Abstract [en]

    We present a polynomial-time parsing algorithm for CCG, based on a new decomposition of derivations into small, shareable parts. Our algorithm has the same asymptotic complexity, O(n⁶), as a previous algorithm by Vijay-Shanker and Weir (1993), but is easier to understand, implement, and prove correct.

  • 323.
    Kuhlmann, Marco
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Satta, Giorgio
    Univ Padua, Italy.
    Jonsson, Peter
    Linköping University, Department of Computer and Information Science, Software and Systems. Linköping University, Faculty of Science & Engineering.
    On the Complexity of CCG Parsing2018In: Computational linguistics - Association for Computational Linguistics (Print), ISSN 0891-2017, E-ISSN 1530-9312, Vol. 44, no 3, p. 447-482Article in journal (Refereed)
    Abstract [en]

    We study the parsing complexity of Combinatory Categorial Grammar (CCG) in the formalism of Vijay-Shanker and Weir (1994). As our main result, we prove that any parsing algorithm for this formalism will take in the worst case exponential time when the size of the grammar, and not only the length of the input sentence, is included in the analysis. This sets the formalism of Vijay-Shanker and Weir (1994) apart from weakly equivalent formalisms such as Tree Adjoining Grammar, for which parsing can be performed in time polynomial in the combined size of grammar and input sentence. Our results contribute to a refined understanding of the class of mildly context-sensitive grammars, and inform the search for new, mildly context-sensitive versions of CCG.

  • 324.
    Kurtz, Robin
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Kuhlmann, Marco
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Exploiting Structure in Parsing to 1-Endpoint-Crossing Graphs2017In: Proceedings of the 15th International Conference on Parsing Technologies, Association for Computational Linguistics, 2017Conference paper (Refereed)
    Abstract [en]

    Deep dependency parsing can be cast as the search for maximum acyclic subgraphs in weighted digraphs. Because this search problem is intractable in the general case, we consider its restriction to the class of 1-endpoint-crossing (1ec) graphs, which has high coverage on standard data sets. Our main contribution is a characterization of 1ec graphs as a subclass of the graphs with pagenumber at most 3. Building on this we show how to extend an existing parsing algorithm for 1-endpoint-crossing trees to the full class. While the runtime complexity of the extended algorithm is polynomial in the length of the input sentence, it features a large constant, which poses a challenge for practical implementations.

  • 325.
    Kvelland Liedström, Max
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Game Time: Speldesign för träning av tidsuppfattning för barn och ungdomar med autismspektrumtillstånd2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Många barn och ungdomar med autismspektrumtillstånd upplever idag svårigheter med tidsuppfattning. Detta yttrar sig i svårigheter att komma i tid och svårigheter att hinna med de aktiviteter som behövs i vardagen. Detta projekt syftar till att ta fram en design för ett spel som på ett underhållande och engagerande sätt låter brukare träna på sin tidsuppfattning. Genom intervjuer med barn och ungdomar med AST i åldrarna 11-18, samt utvärdering av pappersprototyper, togs två spelkoncept fram. Projektet resulterade i intervjuteman, en föreslagen arbetsmetod, belysning av frågor, möjligheter och svårigheter med en sådan metod, två spelkoncept med olika utformning samt tillhörande resultat i form av enkätdata (User Engagement Scale och Lin et als underhållningsskala) och observerade händelser under utvärdering med användare från målgruppen. Relaterade projekt kan använda dessa resultat som informativ grund för sitt eget arbete och därmed ges möjlighet att genomföra ett bättre arbete.

  • 326.
    Kvist, Torbjörn
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Second screen on mobile crossplatform2014Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    Development of mobile applications today are increasingly difficult for developers, because there are many different devices and operating systems. This thesis will look at how a cross-platform framework can be used to develop and implement a second screen as a complement to other devices. he platforms will be evaluated in terms of how complex it is to implement the solution and how they perform under different conditions. The cross-platform frameworks that will be evaluated is OpenFL and PhoneGap.

  • 327.
    Lahoud, Inaya
    et al.
    University of Galatasaray, Turkey.
    Ahrenberg, Lars
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Summary of the Workshop on Educational Knowledge Management2015In: KNOWLEDGE ENGINEERING AND KNOWLEDGE MANAGEMENT, EKAW 2014, SPRINGER-VERLAG BERLIN , 2015, Vol. 8982, p. 64-65Conference paper (Refereed)
    Abstract [en]

    n/a

  • 328.
    Lambrix, Patrick
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Maleki, Jalal
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Learning composite concepts in description logics: A first step1996In: ISMIS: International Symposium on Methodologies for Intelligent Systems Foundations of Intelligent Systems 9th International Symposium, ISMIS '96 Zakopane, Poland, June 9–13, 1996 Proceedings / [ed] Zbigniew W. Raś and Maciek Michalewicz, Springer Berlin/Heidelberg, 1996, p. 68-77Conference paper (Refereed)
    Abstract [en]

    This paper proposes the use of description logics as a representational framework for learning composite concepts. Description logics are restricted variants of first-order logic providing a form of logical bias that dates back to semantic networks. Some recent work investigates concept learning in the context of these formalisms. Also, having recognized the importance of part-whole hierarchies in commonsense reasoning, researchers have started to incorporate part-of reasoning into description logics. In our approach we represent composite concepts in such a formalism. On one hand we have a relatively rich representation language with an infinite space of possible concepts. On the other hand we have special constructs for handling part-of relations that can be used in the learning algorithm to reduce the overall search space.

  • 329.
    Lampi, Maria
    et al.
    Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Disaster Medicine and Traumatology.
    Junker, Johan
    Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Disaster Medicine and Traumatology.
    Tabu, John S.
    Department of Disaster Risk Management, Moi University College of Health and Science, Eldoret, Kenya.
    Berggren, Peter
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Jonson, Carl-Oscar
    Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Disaster Medicine and Traumatology.
    Wladis, Andreas
    Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Disaster Medicine and Traumatology.
    Potential benefits of triage for the trauma patient in a Kenyan emergency department2018In: BMC Emergency Medicine, ISSN 1471-227X, E-ISSN 1471-227X, Vol. 18, no 49, p. 1-7Article in journal (Refereed)
    Abstract [en]

    Background

    Improved trauma management can reduce the time between injury and medical interventions, thus decreasing morbidity and mortality. Triage at the emergency department is essential to ensure prioritization and timely assessment of injured patients. The aim of the present study was to investigate how a lack of formal triage system impacts timely intervention and mortality in a sub-Saharan referral hospital. Further, the study attempts to assess potential benefits of triage towards efficient management of trauma patients in one middle income country.

    Methods

    A prospective descriptive study was conducted. Adult trauma patients admitted to the emergency department during an 8-month period at Moi Teaching and Referral Hospital in Eldoret, Kenya, were included. Mode of arrival and vital parameters were registered. Variables included in the analysis were Injury Severity Score, time before physician’s assessment, length of hospital stay, and mortality. The patients were retrospectively categorized according to the Rapid Emergency Triage and Treatment System (RETTS) from patient records.

    Results

    A total of 571 patients were analyzed, with a mean Injury Severity Score of 12.2 (SD 7.7) with a mean length of stay of 11.6 (SD 18.3) days. The mortality rate was 1.8%. The results obtained in this study illustrate that trauma patients admitted to the emergency department at Eldoret are not assessed in a timely fashion, and the time frame recommendations postulated by RETTS are not adhered to. Assessment of patients according to the triage algorithm used revealed a significantly higher average Injury Severity Score in the red category than in the other color categories.

    Conclusion

    The results from this study clearly illustrate a lack of correct prioritization of patients in relation to the need for timely assessment. This is further demonstrated by the retrospective triage classification of patients, which identified patients with high ISS as in urgent need of care. Since no significant difference in to time to assessment regardless of injury severity was observed, the need for a well-functioning triage system is apparent.

  • 330.
    Lanneld, Viktor
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Bergström, Max
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Responsivitet på menyn: Produktnavigering på en e-handelsplats som är både flexibel och säljande, går det?2014Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The competition in sports equipment and sports fashion today is fierce. And as e-commerce grows, the competing players has to remain accessible and usable regard-less of the device their customers visit the website on. Stadium is Swedens biggest player on the market and puts a lot of effort on their online activity. Something Stadium found interesting was the possibility of introducing elements that would increase the conversion rates directly into the product menu. This study explores the possibility to find a responsive solution for the product menu at Stadiums’ e-commerce website which could contribute to increased conversion rates.

    The study is built upon an experiment and the foundations of the experiment is based upon a market analysis of used design patterns for product navigation in the domain of sport resellers. Added to that, theories of usability and sales aspects, Stadiums own point of view, and known design patterns, have all contributed to the birth of a responsive product navigation concept. What started as sketches first evolved into three high fidelity design solutions (one for desktop devices, one for tablet devices, and one for smartphone devices) and then into working prototypes. The prototypes were tested by multiple users, following a set of tasks. The results was then compared with the same tasks conducted at Stadiums current website.

    The theories we have found clearly indicate that a good user experience greatly affects the potential for higher conversion rates and also increase the possibility of a higher customer loyalty towards the brand. Stadiums’ philosophy is focused on the product range and to show the products as the hero of the brand. The user testing conducted showed that the design solutions made by us didn’t meet the standard of the current Stadium product navigation. The statistics from the tests is spraw-ling and the lack of completness within the prototype shined through. Despite the sprawling results, the study concludes in a design solution that can act as a starting point for further investigations to find the best possible solution.

  • 331.
    Lantz Cronqvist, Mattias
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Development and initial validation of a stochastic discrete event simulation to assess disaster preparedness2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Assessing disaster preparedness in a given region is a complex problem. Current methods are often resource intensive and may lack generalizability beyond a specific scenario. Computer-based stochastic simulations may be an additional method but would require systems that are valid, flexible and easy-to-use.

    Emergo Train System (ETS) is an analogue simulation system used for disaster preparedness assessments. This thesis aimed to digitalize the ETS model and develop a stochastic simulation software for improved disaster preparedness assessments.

    Simulation software was developed in C#. The simulation model was based on ETS. Preliminary verification and validation (V&V) tests were performed, including unit and integration testing, trace validation, and a comparison to a prior analogue ETS disaster preparedness assessment exercise.

    The software contains medically validated patients from ETS and is capable of automatically running disaster scenarios with stochastic variations in the injury panorama, available resources, geographical location, and other parameters. It consists of two main programs; an editor where scenarios can be constructed and a simulation system to evaluate the outcome.

    Initial V&V testing showed that the software is reliable and internally consistent. The comparison to the analogue exercise showed a general high agreement in terms of patient outcome. The analogue exercise featured a train derailment with 397 injured, of which 45 patients suffered preventable death. In comparison, the computer simulation ran 100 iterations of the same scenario and indicated that a median of 41 patients (IQR 31 to 44) would suffer a preventable death.

    Stochastic simulation methods can be a powerful complement to traditional capability assessments methods. The developed simulation software can be used for both assessing emergency preparedness with some validity and as a complement to analogue capability assessment exercises, both as input and to validate results. Future work includes comparing the simulation to real disaster outcomes.

  • 332.
    Larsson, Andreas
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    En prestandastudie på JSON-och XML-formaterad API-data2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper aims to analyze the effects different data representation techniques have on the API generating the data, and the client receiving and processing it. For this purpose, the formats JSON and XML was chosen. In order to analyze the effects, an API was developed in order to generate realistic results. A simple client JavaScript website was created which requested the API for data in which it processed its response to a JSON- or XML-object depending on which test was conducted. The tests were separated in two sce-narios, where the used dataset was large or small respectively, represented in either JSON orXML. The client logged the time it took from the test’s beginning until all responses had been processed. The API-server measured the time it took from receiving the request until it was returned, as well as the system’s CPU- and virtual-memory usage.

    The study found that JSON-formatted data overall resulted in a more efficient opera-tion. In all test cases the processing time for both the client and server were smaller for the JSON-formatted data. However, for small datasets, the study showed that the XML-formatted data used a marginally smaller portion of the system’s resources, although the JSON-formatted data was still processed quicker.

  • 333.
    Larsson, Anna
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Mobilen först: Framställning av en design för Östgötatrafikens mobila hemsida med fokus på användarna2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Östgötatrafiken är ett länstrafikbolag i Östergötland och har idag en hemsida, en mobil hemsida och appar. De har sett att användningen av deras mobila hemsida och deras appar har ökat. För att skapa en bättre användarupplevelse samt för att minska de underhålls- och utvecklingskostnader som kommer med många system är en responsiv hemsida ett bra alternativ för dem. En responsiv hemsida innebär att ett system anpassar sig efter den skärmstorlek som den enhet som används har. Vad som visas och hur det visas beror på om det är en dator, en mobiltelefon eller en surfplatta som används.

    För att skapa en modern och innovativ hemsida valdes att fokusera på den mobila upplevelsen och att designa systemet för mobiltelefonen först. Syftet med studien var då att ta reda på vad användarna vill göra på Östgötatrafikens hemsida på mobilen samt att ta fram ett designförslag för systemet.

    Studien utfördes med fokus på användarna. Det första som gjordes var därför en användarstudie med hjälp av enkäter, intervjuer och observationer. Genom detta skapades en bild av användaren och dess behov på Östgötatrafikens hemsida via mobilen. En kravanalys gjordes för att ta reda på vad som var viktigt för användarna och för att se vad som kan förbättras och förändras med hemsidan.

    Ett designförslag ritades upp med hjälp av wireframes för de två viktigaste funktionerna. Funktionen Reseplaneraren låter användaren söka resor. I denna funktion har användarna fått fler valmöjligheter och sökresultatet visualiseras på ett mer lättöverskådligt sätt än tidigare. Funktionen Realtidskartan är ett nytt koncept som har skapats för att visualisera trafikinformation på ett modernt sätt. I kartan kan användaren se sin position för att få veta vilka hållplatser som finns i närheten. Användaren kan också se på kartan vart olika fordon är just då och om några trafikproblem finns för en tur.

    Utifrån användarstudien, kravanalysen och litteratur skapades ett användarvänligt system som låter användarna enkelt och snabbt utföra uppgifter. Detta bekräftades i det användbarhetstest som utfördes där ett högt resultat erhölls i den SUS-enkät som genomfördes. SUS-enkäten mäter systemets effektivitet och tillfredsställelse. Detta resultat är en del i det arbete som behöver göras för att skapa en responsiv sida till Östgötatrafiken.

  • 334.
    Larsson, Marcus
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Design and evaluation of an image visualisation interface for a life-logging camera2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to explore how a web-based image visualisation interface can be designed to complement an existing product. To achieve this purpose a study was conducted at Narrative, a small independent developer. Their newly released product, the Narrative-clip, is a small automatic camera that takes two pictures every minute. The camera is accompanied by cloud storage functionality and a mobile application which lets the users view their images. Due to the large amount of pictures taken by the camera, voices have been raised for a web-based system to be developed to increase the accessibility of the user content. The goal of the study was to identify requirements, develop a design suggestion for a web-interface and evaluate the interface from a stakeholder perspective.

    The study employed a hybrid design method, drawing on strengths from several recognised and popular design methods. Interviews were conducted with both users and employees at Narrative to identify demands and expectations of the system. The information gathered was later concretised in a design workshop with the goal of producing ideas and solutions to the system. The gathered material was used in three iterative steps, resulting in a final high-fidelity prototype. Each of the iterations used usability testing to identify design issues and to motivate improvements on the system. The conclusion is two-fold: three characteristics important for the final design and two key aspects for the design mindset. The characteristics found to be central for the web-interface were a simple design over multiple features, familiarity with the design and a good overview of one's uploaded content. Furthermore, the design process mindset was equally important. Identified aspects of the mindset that were important for the final design were a broad context and follow-up work.

  • 335.
    Larsson-Green, Peter
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Kinect’s potential in healthcare2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This project investigates if a Microsoft Kinect has the potential to be used in healthcare as an assisting tool for doctors in their work to diagnose patients or by supporting rehabilitation patients with their exercise training. To test its potential, the accuracy in the skeleton data it produces has been investigated, and two different computer programs making use of the Kinect has been created and evaluated. The results suggest that the Kinect has the potential to be used in some fields in healthcare as long as one takes its strengths and weaknesses into consideration.

  • 336.
    Lavrell, Niklas
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Integrating the Google Cast Technology in a Second-screen Solution2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The newly released Google Chromecast has generated an increasing amount of interest for so called second-screen experiences in the market. Although the technology behind such experiences has existed for a couple of years, end users are now truly starting to grasp the concept and benefits of multi-screen. The company, at which the thesis was performed at, provides a cloud-based messaging solution for Internet connected devices, which enables multi-screen use cases. To increase the amount of supported platforms in the solution, new technologies frequently needs to be integrated. In this thesis I have performed an exploratory research & development project with the aim to integrate the Google Cast technology in this multi-screen solution. The fundamental difference in how the two ecosystems were designed resulted in a companion device framework that acted as a wrapper over the technologies. The framework was implemented on the Android platform together with a set of demo applications. The proposed solution should be seen as a starting point for integrating different multi-screen technologies within a single companion device framework. While combining these technologies, a fundamental difference in the user experience between them became apparent. The Google Cast ecosystem relies on the companion device as the interaction point for the end user, whereas television (TV) applications usually have the main interaction point on the actual TV itself via a dedicated remote control. Having this kind of inconsistency within the same set of applications increases the risk of confusion among end users. Therefore I suggest that development of such multi-screen experiences, that combines these technologies, should strive for a high consistency throughout the whole user experience, independent of platforms and technology.

  • 337.
    Lesshammar, Oscar
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Utvärdering av övergång till agil testning2014Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [sv]

    När man skall införa förändringar för att uppnå förbättringar i ett företag så är det lätt att enbart se förändringen i ett ekonomiskt perspektiv. Det som många glömmer bort är hur företagets anställda som befinner sig mitt i förändringen påverkats psykologiskt av förändringsprocessen. Den här studien har sitt fokus mer i hur de anställda har upplevt bytet hellre än genom hur det teoretiskt kan förbättra företaget ekonomiskt. Syftet med studien är att beskriva hur personal påverkas av förändring, både generellt och hur de upplever bytet till agil testning. Och vad som kan göras för att bearbeta de problem som kan uppstå.

    Studien grundar sig på data insamlat från intervjuer, observationer och dokumentanalys för att utvärdera hur utvecklarna på ett småföretag har upplevt och påverkats av övergången till agil testning. Upptäckterna från datainsamlingsmetoderna applicerades på den teoretiska bakgrunden i studien, som behandlade aspekter som teknologistress, agila arbetsmetoder samt testning av både traditionell och agil karaktär.

    Studien resulterade i en översiktlig bild av företagets testprocess och beskriver dess delmoment. I studien framkom det att hur utvecklarna upplever och använder sig av agil testning inte alltid stämmer överrens med företagets vision och studiens teorikapitel.

    Sammanfattningsvis så visar den här studien att utvecklarna var överlag positiva till bytet, men det finns aspekter av den agila testningen som måste bearbetas på företaget. Dessa problem kan avhjälpas genom en utökad kommunikation mellan ledningen och de anställda och genom att de anställda involveras mer i implementeringen av arbetsprocessen.

  • 338.
    Li, Cai
    et al.
    University of Skovde, Sweden.
    Lowe, Robert
    University of Skovde, Sweden.
    Ziemke, Tom
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology. University of Skovde, Sweden.
    A novel approach to locomotion learning: Actor-Critic architecture using central pattern generators and dynamic motor primitives2014In: Frontiers in Neurorobotics, ISSN 1662-5218, Vol. 8Article in journal (Refereed)
    Abstract [en]

    In this article, we propose an architecture of a bio-inspired controller that addresses the problem of learning different locomotion gaits for different robot morphologies. The modeling objective is split into two: baseline motion modeling and dynamics adaptation. Baseline motion modeling aims to achieve fundamental functions of a certain type of locomotion and dynamics adaptation provides a "reshaping" function for adapting the baseline motion to desired motion. Based on this assumption, a three-layer architecture is developed using central pattern generators (CPGs, a bio-inspired locomotor center for the baseline motion) and dynamic motor primitives (DMPs, a model with universal "reshaping" functions). In this article, we use this architecture with the actor-critic algorithms for finding a good "reshaping" function. In order to demonstrate the learning power of the actor-critic based architecture, we tested it on two experiments: (1) learning to crawl on a humanoid and, (2) learning to gallop on a puppy robot. Two types of actor-critic algorithms (policy search and policy gradient) are compared in order to evaluate the advantages and disadvantages of different actor-critic based learning algorithms for different morphologies. Finally, based on the analysis of the experimental results, a generic view/architecture for locomotion learning is discussed in the conclusion.

  • 339.
    Lidström, Jonatan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Rotorsaksanalyser av testriggar: En studie av vad som krävs av Scanias forsknings- och utvecklingsavdelning för att rotorsaksanalyser ska fungera på bästa sätt2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    När Scanias maskiner som ska testa nya lastbilskomponenter eller hela lastbilar, så kallade testriggar, inte fungerar som de ska så fanns det i dagsläget en uppfattning att problemen i vissa fall dels var återkommande och dels var svåranalyserade. På grund av detta ville Scania Tekniskt Centrum (STC) införa rotorsaksanalyser av när testriggar inte fungerade som de skulle. Denna studie har undersökt vad som i dagsläget behövde förändras och vad som möjliggjorde att rotorsaksanalyser av fallerande hos testriggarna skulle fungera så bra som möjligt.

    En nulägesanalys gjordes. Resultaten av denna visade på att fyra roller fanns som var involverade i att åtgärda fel hos testriggarna, nämligen de som äger riggarna, de som arbetar med underhåll av riggarna, de som utvecklar riggarna och de som är ansvariga för arbetsmiljön och säkerheten hos riggarna. En process map skapades för att visa hur dessa roller i dagsläget samverkade för att bygga testriggar och åtgärda fel hos dem.

    Resultaten av nulägesanalysen visade på att fyra övergripande faktorer påverkade huruvida rotorsaksanalyser skulle kunna genomföras. Den första var att ha ett väldefinierat standardförfarande att följa. Den andra var att det fanns en kultur som tillät att utföra rotorsaksanalyser. Den tredje var att bakgrundskunskap kring ett fel skulle finnas tillgänglig. Den fjärde var att kunna sammansätta grupper av olika typer av roller som skulle kunna samarbeta. Dessa fyra faktorer var de som utgicks ifrån för att redovisa saker som fungerade väl och saker som krävde förändring för att rotorsaksanalyser skulle fungera på bästa sätt. Utöver detta gavs förslag på förändringar som skulle åtgärda saker som förhindrade rotorsaksanalyser.

  • 340.
    Lilliehöök, Hampus
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Extraction of word senses from bilingual resources using graph-based semantic mirroring2013Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    In this thesis we retrieve semantic information that exists implicitly in bilingual data. We gather input data by repeatedly applying the semantic mirroring procedure. The data is then represented by vectors in a large vector space. A resource of synonym clusters is then constructed by performing K-means centroid-based clustering on the vectors. We evaluate the result manually, using dictionaries, and against WordNet, and discuss prospects and applications of this method.

  • 341.
    Lindblad, Simon
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Labeling Clinical Reports with Active Learning and Topic Modeling2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Supervised machine learning models require a labeled data set of high quality in order to perform well. Available text data often exists in abundance, but it is usually not labeled. Labeling text data is a time consuming process, especially in the case where multiple labels can be assigned to a single text document. The purpose of this thesis was to make the labeling process of clinical reports as effective and effortless as possible by evaluating different multi-label active learning strategies. The goal of the strategies was to reduce the number of labeled documents a model needs, and increase the quality of those documents. With the strategies, an accuracy of 89% was achieved with 2500 reports, compared to 85% with random sampling. In addition to this, 85% accuracy could be reached after labeling 975 reports, compared to 1700 reports with random sampling.

  • 342.
    Lindell, Jóhann
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Responsive + Server Side, a multi-device targeting web application optimization strategy2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this project is to investigate RESS, Responive + Server Side, a startegy for serving optimized web content to different types of end user devices. RESS is also compared to other mutli-device targeting solutions, Responisve Web Design and Server Side Adaptation, from different points of view, such as performance and workload.

  • 343.
    Lindenfalk, Bertil
    et al.
    Jonkoping Univ, Sweden.
    Vimarlund, Vivian
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering. Jonkoping Univ, Sweden.
    Guidance Through Use: Value as a Pathfinder in e-Health Services Implementation2017In: MEDINFO 2017: PRECISION HEALTHCARE THROUGH INFORMATICS, IOS PRESS , 2017, Vol. 245, p. 151-155Conference paper (Refereed)
    Abstract [en]

    The lack of awareness and confidence in eHealth solutions among certain stakeholders creates a barrier for the implementation of e-Health services. The aim of this paper is to explore issues that promote the development and implementation of patient-centered care services for the elderly. An exploratory case study approach is applied to a e-Health monitoring service that was developed and piloted in 38 homes for the elderly in Sweden and the Netherlands. The unit of analysis, concept of value-in-use, was used in order to determine how pilot participants felt about a service of this kind benefiting them the most. The findings were then translated into actionable considerations for implementing organizations. The results indicate a need for active participation, technical support infrastructure, mobility demands, and an extension of the concept of trust in e-Health services. The knowledge presented in the study is important for decisions makers, public organization strategists, and policy writers.

  • 344.
    Lindenfalk, Bertil
    et al.
    Jonkoping Univ, Sweden.
    Vimarlund, Vivian
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering. Jonkoping Univ, Sweden.
    Understanding Through Use: Elderlys Value Identification in a Service Experience2017In: CONTEXT SENSITIVE HEALTH INFORMATICS: REDESIGNING HEALTHCARE WORK, IOS PRESS , 2017, Vol. 241, p. 103-108Conference paper (Refereed)
    Abstract [en]

    This paper uses a qualitative approach, specifically; narrative analysis, to contextualize users formulation of an understanding of a personalized meal planning service within the ambient assisted living domain. By focusing on how users, in this case elderly over 65, formed an understanding of a service, and, what they thought valuable in using the service, based on their understanding. The results indicate how users compare their initial understanding to their experienced understanding, formed during usage, and how this affects their value formulation of specific service aspects. The paper gives not only provides valuable insight into contextualizing aspects of health and wellness services, but to aspects of importance for implementation, by showing how value aspects of services from a user perspective are important to consider during these processes.

  • 345.
    Linder, Johan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    How to Develop a Help System for a Communication App2015Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This study aimed to develop a help system for a communication app, identify usability issues regarding that help system and develop redesigns to improve it. The focus was to maximize perceived usefulness and minimize perceived annoyance of the help system. During the study two design proposals were developed and two user tests, which used low-fidelity prototypes. were performed to evaluate the design proposals. The first design proposal was evaluated in the first user test, thereafter an iteration of that design was developed based on the usability issues found in the user test. This iteration of the design was the second design proposal which were evaluated in the second user tests. Both design proposals and data from both user tests were analysed to- gether which resulted in seven recommendation that aimed to maximize perceived usefulness and minimize perceived annoyance when developing a help system for a communication app. Due to a lack of generalizability these recommendations should however be used with caution since they are mainly applicable to the system evaluated in this study. They can however be used as an inspi- ration and a starting point for someone designing a help system for an other communication app. 

  • 346.
    Lindroth, Kalle
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Olsson, Daniel
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Improving information sharing between teachers and assistants: Implementation and testing of a web application2018Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The teachers at Linköpings University are currently using an emailclient to handle the sharing of information between teachers involved ina course. This is inefficient due to the difficulty of sharing existinginformation with new course memebers, sharing new information with existingcourse members and finding specific information is an issue because of thelack of course separation. Some features, such as handing over a courseto a new leading teacher, are also lacking which makes course managementdifficult. To solve this issue, we have developed a web application whichfocuses on its usability and efficiency to make it easier for coursestaff to share course information. By performing usability and efficiencytests where test subjects used the new application as well as the oldemail system we established that the newly developed application with itsadditional features became an improvement over the old email system.

  • 347.
    Lindén, Simon
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Cloud Computing – A review of Confidentiality and Privacy2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    With the introduction of cloud computing the computation got distributed, virtualized and scalable. This also meant that customers of cloud computing gave away some of their control of their system. That led to a heighten importance of how to handle security in the cloud, for both provider and customer. Since security is such a big subject the focus of this thesis is on confidentiality and privacy, both closely related to how to handle personal data. With the help of a systematic literature review in this thesis, current challenges and possible mitigations are presented in some different areas and concerning both the cloud provider and the cloud customer. The conclusion of the thesis is that cloud computing in itself have matured a lot since the early 2000’s and all of the challenges provided have possible mitigations. However, the exact implementation of said mitigation will differ depending on cloud customer and the exact application developed as well as the exact service provided by the cloud provider. In the end it will all boil down to a process that involves technology, employees and policies and with that can any user secure its cloud application.

  • 348.
    Lowndes, Bethany
    et al.
    Mayo Clinic, Robert D. and Patricia E. Kerns Center for the Science of Health Care Delivery, Rochester, MN, USA / Mayo Clinic, Department of Health Sciences Research, Rochester, MN, USA.
    Forsyth, Katherine
    Mayo Clinic, Robert D. and Patricia E. Kerns Center for the Science of Health Care Delivery, Rochester, MN, USA / Mayo Clinic, Department of Health Sciences Research, Rochester, MN, USA.
    Prytz, Erik
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Jonson, Carl-Oscar
    Region Östergötland, Center for Disaster Medicine and Traumatology. Linköping University, Faculty of Medicine and Health Sciences.
    Abdelrahman, Amro
    Mayo Clinic, Robert D. and Patricia E. Kerns Center for the Science of Health Care Delivery, Rochester, MN, USA / Mayo Clinic, Department of Health Sciences Research, Rochester, MN, USA.
    Matthew, Sztajnkrycer
    Mayo Clinic, Department of Family Medicine, Rochester, MN, USA.
    Franz, III, Walter
    Mayo Clinic, Department of Medicine, Rochester, MN, USA.
    Blocker, Renaldo
    Mayo Clinic, Robert D. and Patricia E. Kerns Center for the Science of Health Care Delivery, Rochester, MN, USA / Mayo Clinic, Department of Health Sciences Research, Rochester, MN, USA.
    Hallbeck, Susan
    Mayo Clinic, Robert D. and Patricia E. Kerns Center for the Science of Health Care Delivery, Rochester, MN, USA / Mayo Clinic, Department of Health Sciences Research, Rochester, MN, USA.
    A Preliminary Comparison of Three Tourniquet Instructions for Just-in-Time Guidance of a Simulated Tourniquet Application2017In: Proceedings of the Human Factors and Ergonomics Society 2017 Annual Meeting, Santa Monica: Human Factors and Ergonomics Society, HFES , 2017, p. 1076-1080Conference paper (Refereed)
    Abstract [en]

    The American College of Surgeons (ACS) and the Department of Homeland Security (DHS) encourage the use of tourniquets as part of the “Stop the Bleed” campaign. Both have provided instructions for layperson tourniquet application in order to save the life of a hemorrhaging trauma victim. This study sought to compare the impact of using ACS and DHS instructions with manufacturer-provided instructions for the completion of simulated tourniquet application steps. Thirty surgical trainees completed a simulated tourniquet application with one of the three instruction sets. Their completion time and success for each step were measured. Participants that received ACS instructions failed the fewest number of steps (p < 0.01) and completed the task faster (Mean (SD) = 70 (33) seconds) compared to those with the manufacturer-provided instructions (p < 0.01). Tourniquet instruction sets need to be refined in order to optimize the success rate of just-in-time guidance for tourniquet application.

  • 349.
    Lowndes, Bethany
    et al.
    Univ Nebraska Med Ctr, NE 68198 USA; Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA.
    Law, Katherine
    Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA.
    Abdelrahman, Amro
    Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA.
    Prytz, Erik
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Jonson, Carl-Oscar
    Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Disaster Medicine and Traumatology.
    Sztajnkrycer, Matthew
    Mayo Clin, MN 55905 USA.
    Hawthorne, Hunter
    Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA.
    Franz, Walter
    Mayo Clinic, Department of Family Medicine, Rochester, MN, USA.
    Blocker, Renaldo
    Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA.
    Hallbeck, M. Susan
    Mayo Clin, MN 55905 USA; Mayo Clin, MN 55905 USA.
    Preliminary Investigation of Civilian Clinician Perspectives & Just-in-Time Guidance for Tourniquet Use to "Stop the Bleed"2019In: Military medicine, ISSN 0026-4075, E-ISSN 1930-613X, Vol. 184, no 3-4, p. 28-36Article in journal (Refereed)
    Abstract [en]

    Objective

    The American College of Surgeons (ACS) encourages clinicians to provide training to laypeople on tourniquet application. It is unclear whether clinicians are confident in their abilities and equipped with adequate knowledge, skills, and resources. This study aimed to determine surgical trainee knowledge and attitudes regarding tourniquet application and compare the effectiveness of instructions.

    Methods

    Thirty surgical trainees performed a tourniquet application simulation using a Combat Application Tourniquet and one of the three instructions sets developed by ACS, Department of Homeland Security, and the tourniquet manufacturer. Participants reported tourniquet knowledge, attitudes, and confidence and discussed the instructions. One instruction set was updated and compared to the original set with 20 new trainees.

    Results

    Participants with ACS instructions passed the greatest number of steps (p < 0.01) and completed the task significantly faster compared to those with manufacturer instructions (p < 0.01). Participants (80%) reported favorable views toward tourniquets but 30–60% did not align with to ACS tourniquet guidelines. Focus group participants suggested revisions to the ACS instructions. Comparing the original and revised version of these instructions resulted in no significant improvements.

    Conclusions

    ACS instructions provide guidance; however, improvements to tourniquet instruction are needed for success in controlling exsanguinating hemorrhage.

  • 350.
    Lundberg, Jonas
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Arvola, Mattias
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Westin, Carl
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Holmlid, Stefan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Nordvall, Mathias
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Josefsson, Billy
    LFV, Sweden.
    Cognitive work analysis in the conceptual design of first-of-a-kind systems - designing urban air traffic management2018In: Behavior and Information Technology, ISSN 0144-929X, E-ISSN 1362-3001, Vol. 37, no 9, p. 904-925Article in journal (Refereed)
    Abstract [en]

    Cognitive Work Analysis (CWA) is an appropriate approach in design for high-stakes domains, such as air traffic management (ATM) since it focuses on human expert performance in regular and contingency situations. However, CWA is not suitable for the design of a first-of-a-kind system since there is nothing to analyse before the start of the design process. In 2017, unmanned air traffic management (UTM) for intense drone traffic in cities was such a system. Making things worse, the UTM system has to be in place before the traffic, since it provides basic safety. In this research-through-design study, we present conceptual designing as a bootstrapping approach to CWA in the design of a first-of-a-kind UTM system. In a series of co-design workshops, we identified future services, traffic patterns, and regulations that framed the design of UTM system concepts. They were based on combinations of four basic building blocks: points, lines, planes, and volumes. Concepts of point-based control, airport geofences, grid squares, layers, and tubes were discussed. Throughout the conceptual designing, results were documented in an evolving Work Domain Analysis (WDA), which is a cornerstone of CWA. This approach allowed us to bootstrap the CWA for a first-of-a-kind-system.

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