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  • 301.
    Karlsson, Linus
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    RESTful Cloud Server2013Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This report is about the development of a cloud service server that will be used to store user information. The clouds purpose is to store information about the user and the devices he or she uses. The cloud has web services that enable users to retrieve and store the data on the server. It isalso responsible for user administration and security of the data. A web client is also developed in parallel with the cloud. The web client uses the cloud’s  web services to show and modify data for the user.

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    RCS
  • 302.
    Karlsson, Rikard
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Utvärdering av kvalitetsregistret och processtödssystemet Carath2017Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [sv]

    Studien genomförs i syfte att utvärdera hur arbetsflödet i sjukvårdssystemet Carath är anpassat efter rutiner hos användarna på de thoraxkliniker som äger systemet och där det används. Tre arbetsplatsundersökningar och elva stycken intervjuer genomfördes med sjukhuspersonal på olika kliniker i Sverige med metoden kontextuell design.

    Resultaten från studien visar att Carath är anpassat efter patientflödet på klinikerna men i mindre grad anpassat efter användares arbetsrutiner och roller. Studien visar även på att systemet saknar inbyggd hantering för återkoppling och kontroller av registrerad data. Dessa funktioner utförs istället manuellt utanför systemet. Samtliga av de saknade funktionerna bekräftas även genom SEIPS-modellen som funktioner som är rekommenderbara inom ett sjukvårdssystem. Sammantaget visar resultatet från kontextuella intervjuer med kommentarer från personal, genererade sekvensmodeller över arbetsflöden och utvärderingar mot SEIPS-modellen att Carath skulle behöva balanseras mellan patientflöde och personalens arbetsflöde. Funktioner för återkoppling och kontroll skulle integreras i systemet. Framtida arbete innefattar en undersökning kring integration mot andra system inom sjukvården.

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  • 303.
    Keisala, Simon
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Using a Character-Based Language Model for Caption Generation2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Using AI to automatically describe images is a challenging task. The aim of this study has been to compare the use of character-based language models with one of the current state-of-the-art token-based language models, im2txt, to generate image captions, with focus on morphological correctness.

    Previous work has shown that character-based language models are able to outperform token-based language models in morphologically rich languages. Other studies show that simple multi-layered LSTM-blocks are able to learn to replicate the syntax of its training data.

    To study the usability of character-based language models an alternative model based on TensorFlow im2txt has been created. The model changes the token-generation architecture into handling character-sized tokens instead of word-sized tokens.

    The results suggest that a character-based language model could outperform the current token-based language models, although due to time and computing power constraints this study fails to draw a clear conclusion.

    A problem with one of the methods, subsampling, is discussed. When using the original method on character-sized tokens this method removes characters (including special characters) instead of full words. To solve this issue, a two-phase approach is suggested, where training data first is separated into word-sized tokens where subsampling is performed. The remaining tokens are then separated into character-sized tokens.

    Future work where the modified subsampling and fine-tuning of the hyperparameters are performed is suggested to gain a clearer conclusion of the performance of character-based language models.

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  • 304.
    Keskisärkkä, Robin
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Semantic Complex Event Processing for Decision Support2014In: The Semantic Web – ISWC 2014: 13th International Semantic Web Conference, Riva del Garda, Italy, October 19-23, 2014. Proceedings, Part II, Springer, 2014, Vol. 8797, p. 529-536Conference paper (Refereed)
    Abstract [en]

    An increasing amount of information is being made available as online streams, and streams are expected to grow in importance in a variety of domains in the coming years (e.g., natural disaster response, surveillance, monitoring of criminal activity, and military planning [7,22]). Semantic Web (SW) technologies have the potential to combine heterogeneous data sources, leveraging Linked Data principles, but traditional SW methods assume that data is more or less static, which is not the case for streams. The SW community has attempted to bring streams to a semantic level, i.e., Linked Stream Data, and a number of RDF stream processing engines have been produced [1,4,13,20]. This thesis work aims at developing and evaluating techniques for creating aggregated and layered abstractions of events. These abstractions can be used by decision makers to create better situation awareness, assisting in identifying decision opportunities, structuring and summarizing decision problems, and decreasing cognitive workload.

  • 305. Order onlineBuy this publication >>
    Keskisärkkä, Robin
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Towards Semantically Enabled Complex Event Processing2017Licentiate thesis, monograph (Other academic)
    Abstract [en]

    The Semantic Web provides a framework for semantically annotating data on the web, and the Resource Description Framework (RDF) supports the integration of structured data represented in heterogeneous formats. Traditionally, the Semantic Web has focused primarily on more or less static data, but information on the web today is becoming increasingly dynamic. RDF Stream Processing (RSP) systems address this issue by adding support for streaming data and continuous query processing. To some extent, RSP systems can be used to perform complex event processing (CEP), where meaningful high-level events are generated based on low-level events from multiple sources; however, there are several challenges with respect to using RSP in this context. Event models designed to represent static event information lack several features required for CEP, and are typically not well suited for stream reasoning. The dynamic nature of streaming data also greatly complicates the development and validation of RSP queries. Therefore, reusing queries that have been prepared ahead of time is important to be able to support real-time decision-making. Additionally, there are limitations in existing RSP implementations in terms of both scalability and expressiveness, where some features required in CEP are not supported by any of the current systems. The goal of this thesis work has been to address some of these challenges and the main contributions of the thesis are: (1) an event model ontology targeted at supporting CEP; (2) a model for representing parameterized RSP queries as reusable templates; and (3) an architecture that allows RSP systems to be integrated for use in CEP. The proposed event model tackles issues specifically related to event modeling in CEP that have not been sufficiently covered by other event models, includes support for event encapsulation and event payloads, and can easily be extended to fit specific use-cases. The model for representing RSP query templates was designed as an extension to SPIN, a vocabulary that supports modeling of SPARQL queries as RDF. The extended model supports the current version of the RSP Query Language (RSP-QL) developed by the RDF Stream Processing Community Group, along with some of the most popular RSP query languages. Finally, the proposed architecture views RSP queries as individual event processing agents in a more general CEP framework. Additional event processing components can be integrated to provide support for operations that are not supported in RSP, or to provide more efficient processing for specific tasks. We demonstrate the architecture in implementations for scenarios related to traffic-incident monitoring, criminal-activity monitoring, and electronic healthcare monitoring.

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  • 306.
    Keskisärkkä, Robin
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Blomqvist, Eva
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Event Object Boundaries in RDF Streams2013In: Proceedings of the 2nd International Workshop on Ordering and Reasoning, Co-located with the 12th International Semantic Web Conference (ISWC 2013), CEUR-WS , 2013, Vol. 1059, p. 37-42Conference paper (Refereed)
    Abstract [en]

    The amount of information available as online streams is increasing steadily. A number of RDF stream processing systems have been developed in an attempt to leverage existing Semantic Web technologies, and to support typical stream operations, but very little attention has been paid to the way in which event objects (i.e. data records representing events) are streamed. In this position paper, we present the issue of respecting event object boundaries in RDF streams, and discuss some pros and cons of the various solutions

  • 307.
    Keskisärkkä, Robin
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Blomqvist, Eva
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Supporting Real-Time Monitoring in Criminal Investigations2015In: SEMANTIC WEB: ESWC 2015 SATELLITE EVENTS, SPRINGER INT PUBLISHING AG , 2015, Vol. 9341, p. 82-86Conference paper (Refereed)
    Abstract [en]

    Being able to analyze information collected from streams of data, generated by different types of sensors, is becoming increasingly important in many domains. This paper presents an approach for creating a decoupled semantically enabled event processing system, which leverages existing Semantic Web technologies. By implementing the actor model, we show how we can create flexible and robust event processing systems, which can leverage different technologies in the same general workflow. We argue that in this context RSP systems can be viewed as generic systems for creating semantically enabled event processing agents. In the demonstration scenario we show how real-time monitoring can be used to support criminal intelligence analysis, and describe how the actor model can be leveraged further to support scalability.

  • 308.
    Keskisärkkä, Robin
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Jönsson, Arne
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Automatic Text Simplification via Synonym Replacement2012In: Proceedings of the Fourth Swedish Language Technology Conference, 2012, 2012Conference paper (Other academic)
  • 309.
    Keskisärkkä, Robin
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Li, Huanyu
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering.
    Cheng, Sijin
    Linköping University, Faculty of Science & Engineering. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Carlsson, Niklas
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering.
    Lambrix, Patrick
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    An Ontology for Ice Hockey2019In: ISWC 2019 Satellites: Proceedings of the ISWC 2019 Satellite Tracks (Posters & Demonstrations, Industry, and Outrageous Ideas) co-located with 18th International Semantic Web Conference (ISWC 2019), 2019, p. 13-16Conference paper (Refereed)
    Abstract [en]

    Ice hockey is a highly popular sport that has seen significant increase in the use of sport analytics. To aid in such analytics, most major leagues collect and share increasing amounts of play-by-play data and other statistics. Additionally, some websites specialize in making such data available to the public in user-friendly forms. However, these sites fail to capture the semantic information of the data, and cannot be used to support more complex data requirements. In this paper, we present the design and development of an ice hockey ontology that provides improved knowledge representation, enables intelligent search and information acquisition, and helps when using information from multiple databases. Our ontology is substantially larger than previous ice hockey ontologies (that cover only a small part of the domain) and provides a formal and explicit representation of the ice hockey domain, supports information retrieval, data reuse, and complex performance metrics.

  • 310.
    Kim, Yanghee
    et al.
    Utah State University, USA.
    Silvervarg, Annika
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Haake, Magnus
    Cognitive Science, Lund University, Sweden.
    Gulz, Agneta
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    The effect of the visual gender of an embodied agent: A cross-cultural comparison2013In: Annual Meeting of the American Educational Research Association (AERA 2013), Washington: AERA, American Educational Research Association , 2013, p. 1-9Conference paper (Other academic)
    Abstract [en]

    This study explored if the visual gender representations (androgynous, male, or female) of an embodied agent would influence students’ perceptions of their agent and their attitudes toward the agent as their conversational partner. The study also explored if students’ gender and cultural background would interact with the agent’s visual gender to influence their perceptions and attitudes. Participants were 208 early-teen students sampled from US and South Korea. The results revealed that student gender was a significant factor for influencing students' perceptions and attitudes and that the students showed positive attitudes toward an androgynous agent more than toward a gendered agent (either male or female).

  • 311.
    Kircher, Katja
    et al.
    Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences. Swedish Natl Rd and Transport Res Inst VTI, S-58195 Linkoping, Sweden.
    Ihlstrom, Jonas
    Swedish Natl Rd and Transport Res Inst VTI, S-58195 Linkoping, Sweden.
    Nygårdhs, Sara
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences. Swedish Natl Rd and Transport Res Inst VTI, S-58195 Linkoping, Sweden.
    Ahlstrom, Christer
    Swedish Natl Rd and Transport Res Inst VTI, S-58195 Linkoping, Sweden.
    Cyclist efficiency and its dependence on infrastructure and usual speed2018In: Transportation Research Part F: Traffic Psychology and Behaviour, ISSN 1369-8478, E-ISSN 1873-5517, Vol. 54, p. 148-158Article in journal (Refereed)
    Abstract [en]

    Bicyclists are a heterogeneous group, with varying abilities, traffic education and experience. While efficiency was identified as an important factor on utility bicycle trips, it might be traded for experienced safety, for example by choosing different pathways in a given situation, or by relinquishing ones right of way. In a semi-controlled study with 41 participants, a grouping was made according to self-reported riding speed in relation to other cyclists. The participants cycled twice along a 3 km inner-city route, passing four intersections with different priority rules. The cyclists were free to choose how to negotiate the intersections. Speed and the traffic surroundings were recorded via gps and cameras on the bike of the participant and of a following experimenter. For each cyclist, the base speed on undisturbed segments was determined as reference. Based on this, the efficiency in different types of intersections was computed per cyclist group. It turned out that infrastructural aspects, cyclist group and the presence and behaviour of interacting traffic influenced cyclist efficiency. Faster cyclists were delayed more when the infrastructure required a stop regardless of the traffic situation, like at a red traffic light or a stop sign. The members of the so-called comfort cyclists group were delayed the most in a roundabout with mixed traffic, where many chose to get off their bike and walk. In a society working for equality of access to the transport system, it is recommended to develop solutions that consider and accommodate the behaviours of different cyclist groups when planning bicycling infrastructure. (C) 2018 Elsevier Ltd. All rights reserved.

  • 312.
    Kirkegaard, Camilla
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences. Linköpings Universitet.
    Adding Challenge to a Teachable Agent in a Virtual Learning Environment2016Licentiate thesis, monograph (Other academic)
    Abstract [en]

    The topic of this thesis concerns what happens when challenging behavior is added to a teachable agent in a virtual learning environment. The aim of adding challenging behavior to teachable agents is to encourage students to engage in learning behaviors, improve their motivation and engagement, which may result in a deeper level of comprehension and an improved learning experience. We conducted an explorative user study, using Guardian of History, a teachable agent learning environment in history. We analyzed data from 146 students, 11-12 years old, from a Swedish school. The students were assigned to two different agent conditions: traditional teachable agent (TA) or a challenging TA (CTA). The conditions were also balanced with respect to the students’ level of self-efficacy. The CTA exhibited the following challenging behaviors: 1) introduction of error, 2) rejection of correct facts, and 3) proposal of a higher level of difficulty. Students who used the challenging TA and also had a high level of self-efficacy performed better in the CTA condition and students with a low level of self-efficacy reached better academic achievement in the traditional TA condition. Students did not experience the learning-by-teaching effects different by the introduced challenging TA behaviors. Students within the CTA condition got better at responding to challenging TA behavior, than students in the TA condition. The CTA behavior “rejection of correct facts” was better received than the “rejection of correct”, this suggests that a challenging TA may benefit to a larger degree by questioning rather than by introducing errors.

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  • 313.
    Kirkegaard, Camilla
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Gulz, Agneta
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Silvervarg, Annika
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Introducing a challenging teachable agent2014In: Learning and Collaboration Technologies: Designing and Developing Novel Learning Experiences / [ed] Zaphiris, P; Ioannou, A, Berlin: Springer Berlin/Heidelberg, 2014, p. 53-62Conference paper (Refereed)
    Abstract [en]

    This paper explores the potentials of a new type of pedagogical agent – a Challenger Teachable Agent. The aim of such a pedagogical agent is to increase engagement and motivation, and challenge students into deeper learning and metacognitive reasoning. It is based on the successful implementation of the Learning by Teaching approach in Teachable Agents, and in addition it draws on previous work that has shown the potential of resistance or challenge as means to improve learning. In this paper we discuss how these two bases can be combined and realized through new types of behaviours in a Teachable Agent

  • 314.
    Kirkegaard, Camilla
    et al.
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Tärning, Betty
    Lunds univesitet.
    Haake, Magnus
    Lunds universitet.
    Gulz, Agneta
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Silvervarg, Annika
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Ascribed gender and charactersitics of a visually androgynous Teachable Agent2014In: Proceedings of 14th International Conference on Intelligent Virtual Agents, IVA 2014, Boston, USA, August, 27-29, 2014. / [ed] Bickmore, Timothy, Marsella, Stacy, Sidner, Candace, Berlin: Springer Berlin/Heidelberg, 2014, p. 232-235Conference paper (Refereed)
    Abstract [en]

    This paper explores how users ascribe gender to a visually androgynous teachable agent, and if and how the ascribed gender can influence the perceived personality characteristics of the agent. Previous studies have shown positive effects of using agents with more neutral or androgynous appearances, for instance, a more gender neutral agent evoked more positive attitudes on females than did a more stereotypical female agent [1] and androgynous agents were less abused than female agents [2]. Another study showed that even though an agent was visually androgynous, the user typically ascribed a gender to it [3].

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  • 315.
    Klamer, Linda
    Linköping University, Department of Computer and Information Science, Human-Centered systems.
    Design and Evaluation of a Visualizing Tool for Logistics Analysis2017Independent thesis Basic level (degree of Bachelor), 12 credits / 18 HE creditsStudent thesis
    Abstract [en]

    Communicating complex relationships discovered with logistics analysis is a challenge within Life Cycle Management. The aim of this thesis is to propose a design for a visualization tool that simplifies such communication for improved expert-manager collaboration. Semi-structured interviews were conducted with expert users - the prospective primary user group of the tool - in order to gain knowledge about the requirements. Based on this, a HiFi prototype was developed using Axure and its usability was evaluated using scenario-based approach and SUS questionnaire. The results revealed that the experts found current methods both time consuming and challenging. A tool with the purpose of displaying results from logistics analysis – for both experts and managers - should offer flexibility, both in terms of functionality and appearance. In addition, it is essential to reduce the complexity to increase the understanding of novices. Future work should include customers in the design process. 

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  • 316.
    Klasson, Sofia
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Att författa en Design- en processorienterad fallstudie av manusförfattandets arbetsprocess i ett interaktionasdesignarbete2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis is a process oriented case-study. The studied case is a interactiondesignassignment of a databasevisualisation and the process. The goalis to do this according to the ways of a screenwriter.When the computers spread from the military and university's into homes all around the world the computers and the programs had to becomeeasier for the users to understand and use. User interfacedesign became more and more important and companies like Apple put a lot of resources intothe designprocess. This quite new and evolving area of research, interactiondesign, has been forced to search for methods in other areas like lm, gamedesign, psychology and behavioural science. The area still needs to evolve and keep looking for new methods to bring the area forward.In this thesis the methods of a screenwriter is used in a interaction designwork.The main advantage of the screenwritingprocess might be the focuson the users feelings. This aspect was noted by Adam Connor during his speech at the conference InteractionEleven last year. Though Connor hasn't been writing any articles on this domain, it surely is an interesting aspectthat can help bring interaction deign forward. This thesis proves that it is possible to conduct a interaction designwork according to a screenwriters workingprocess with some advantages compared to common interactiondesignprocess.

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  • 317.
    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.

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  • 318.
    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.

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    Responsive design in Windows 8 applications
  • 319.
    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.

  • 320.
    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. 

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  • 321.
    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.  

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    User interaction
  • 322.
    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)
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  • 323.
    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)
  • 324.
    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.

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  • 325.
    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

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  • 326.
    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.

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  • 327.
    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.

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  • 328.
    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

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    NES 2002
  • 329.
    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.

  • 330.
    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.

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  • 331.
    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.

  • 332.
    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.

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    Modell för att jobba med användbarhet i ett Affärssystem
  • 333.
    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).

  • 334.
    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.

  • 335.
    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.

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  • 336.
    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.

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  • 337.
    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.

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  • 338.
    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.

  • 339.
    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.

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  • 340.
    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.

  • 341.
    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.

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  • 342.
    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.

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  • 343.
    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

  • 344.
    Lambe, Fiona
    et al.
    Stockholm Environm Inst, Sweden.
    Ran, Ylva
    Stockholm Environm Inst, Sweden.
    Jurisoo, Marie
    Stockholm Environm Inst, Sweden.
    Holmlid, Stefan
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Muhoza, Cassilde
    Stockholm Environm Inst, Kenya.
    Johnson, Oliver
    Stockholm Environm Inst, Sweden.
    Osborne, Matthew
    Stockholm Environm Inst, Sweden.
    Embracing complexity: A transdisciplinary conceptual framework for understanding behavior change in the context of development-focused interventions2020In: World Development, ISSN 0305-750X, E-ISSN 1873-5991, Vol. 126, article id 104703Article in journal (Refereed)
    Abstract [en]

    Many interventions that aim to improve the livelihoods of vulnerable people in low-income settings fail because the behavior of the people intended to benefit is not well understood and /or not reflected in the design of interventions. Methods for understanding and situating human behavior in the context of development interventions tend to emphasize experimental approaches to objectively isolate key drivers of behavior. However, such methods often do not account for the importance of contextual factors and the wider system. In this paper we propose a conceptual framework to support intervention design that links behavioral insights with service design, a branch of the creative field of design. To develop the framework, we use three case studies conducted in Kenya and Zambia focusing on the uptake of new technologies and services by individuals and households. We demonstrate how the framework can be useful for mapping individuals experiences of a new technology or service and, based on this, identify key parameters to support lasting behavior change. The framework reflects how behavior change takes place in the context of complex social-ecological systems - that change over time, and in which a diverse range of actors operate at different levels - with the aim of supporting the design and delivery of more robust development-oriented interventions. (C) 2019 The Authors. Published by Elsevier Ltd.

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  • 345.
    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.

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  • 346.
    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, article id 49Article 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.

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  • 347.
    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.

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  • 348.
    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.

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  • 349.
    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.

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  • 350.
    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.

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    Mobilen först
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