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  • 151.
    Birger, Christopher
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Optimal Coherent Reconstruction of Unstructured Mesh Sequences with Evolving Topology2014Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis work will investigate and implement a method for reconstructing an unstructured mesh sequence with evolving topology. The goal of the method is to increase frame-to-frame coherency of the triangulation. The motivation of the method is that many of current state-of-the-art mesh compression and decimation algorithms for mesh sequences are based on static connectivity.

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    fulltext
  • 152.
    Birkeland, A.
    et al.
    University of Bergen, Bergen, Norway.
    Solteszova, V.
    University of Bergen, Bergen, Norway; Christian Michelsen Research, Bergen, Norway.
    Honigmann, D.
    N22 Research and Technology Transfer, Wiener Neustadt, Austria.
    Gilja, O.H.
    Haukeland University Hospital, Bergen, Norway.
    Brekke, S.
    University of Bergen, Bergen, Norway; Archer—The Well Company, Bergen, Norway.
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Viola, I.
    University of Bergen, Bergen, Norway; Vienna University of Technology, Vienna, Austria.
    The ultrasound visualization pipeline2014In: Mathematics and Visualization, ISSN 1612-3786, Vol. 37, p. 283-303Article in journal (Refereed)
    Abstract [en]

    Radiology is one of themain tools inmodernmedicine.Anumerous set of deceases, ailments and treatments utilize accurate images of the patient. Ultrasound is one of the most frequently used imaging modality in medicine. The high spatial resolution, its interactive nature and non-invasivenessmakes it the first choice inmany examinations. Image interpretation is one of ultrasound’s main challenges. Much training is required to obtain a confident skill level in ultrasound-based diagnostics. State-of-the-art graphics techniques is needed to providemeaningful visualizations of ultrasound in real-time. In this paper we present the process-pipeline for ultrasound visualization, including an overview of the tasks performed in the specific steps. To provide an insight into the trends of ultrasound visualization research, we have selected a set of significant publications and divided them into a technique-based taxonomy covering the topics pre-processing, segmentation, registration, rendering and augmented reality. For the different technique types we discuss the difference between ultrasound-based techniques and techniques for other modalities.

  • 153.
    Bivall Persson, Petter
    et al.
    Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
    Cooper, Matthew
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
    Jonsson, Bengt-Harald
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Molecular Biotechnology.
    Tibell, Lena
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Division of cell biology.
    Use of Chemical Force Feedback for Multisensory Insights into Ligand Docking2007In: VII European Symposium of The Protein Society: From Proteins to Proteome, 2007, p. 151-151Conference paper (Refereed)
  • 154.
    Bivall Persson, Petter
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Tibell, Lena
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Division of cell biology.
    Cooper, Matthew
    Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
    Jonsson, Bengt-Harald
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Molecular Biotechnology.
    Evaluating the Effectiveness of Haptic Visualization in Biomolecular Education - Feeling Molecular Specificity in a Docking Task2006In: 12th IOSTE Symposium, Universiti Science Malaysia , 2006, p. 745-752Conference paper (Refereed)
    Abstract [en]

    Within the molecular life sciences extensive use is made of visual representations, ranging from sketches to advanced computer graphics, often used to convey abstract knowledge that is difficult for the student to grasp. This work evaluates a new visual and haptic (tactile/kinetic) tool for protein docking in an in situ learning situation by combining qualitative and quantitative methods, performing tests and interviews with students; all aiming at a proper inclusion of visualization tools into biomolecular education. Preliminary results indicate time gains, strong positive affective responses and learning gains from the tasks, however the influence of haptics needs further investigation.

  • 155. Order onlineBuy this publication >>
    Bivall, Petter
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Touching the Essence of Life: Haptic Virtual Proteins for Learning2010Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This dissertation presents research in the development and use of a multi-modal visual and haptic virtual model in higher education. The model, named Chemical Force Feedback (CFF), represents molecular recognition through the example of protein-ligand docking, and enables students to simultaneously see and feel representations of the protein and ligand molecules and their force interactions. The research efforts have been divided between educational research aspects and development of haptic feedback techniques.

    The CFF model was evaluated in situ through multiple data-collections in a university course on molecular interactions. To isolate possible influences of haptics on learning, half of the students ran CFF with haptics, and the others used the equipment with force feedback disabled. Pre- and post-tests showed a significant learning gain for all students. A particular influence of haptics was found on students reasoning, discovered through an open-ended written probe where students' responses contained elaborate descriptions of the molecular recognition process.

    Students' interactions with the system were analyzed using customized information visualization tools. Analysis revealed differences between the groups, for example, in their use of visual representations on offer, and in how they moved the ligand molecule. Differences in representational and interactive behaviours showed relationships with aspects of the learning outcomes.

    The CFF model was improved in an iterative evaluation and development process. A focus was placed on force model design, where one significant challenge was in conveying information from data with large force differences, ranging from very weak interactions to extreme forces generated when atoms collide. Therefore, a History Dependent Transfer Function (HDTF) was designed which adapts the translation of forces derived from the data to output forces according to the properties of the recently derived forces. Evaluation revealed that the HDTF improves the ability to haptically detect features in volumetric data with large force ranges.

    To further enable force models with high fidelity, an investigation was conducted to determine the perceptual Just Noticeable Difference (JND) in force for detection of interfaces between features in volumetric data. Results showed that JNDs vary depending on the magnitude of the forces in the volume and depending on where in the workspace the data is presented.

    List of papers
    1. Designing and Evaluating a Haptic System for Biomolecular Education
    Open this publication in new window or tab >>Designing and Evaluating a Haptic System for Biomolecular Education
    Show others...
    2007 (English)In: IEEE Virtual Reality Conference, 2007. VR '07. / [ed] Sherman, W; Lin, M; Steed, A, Piscataway, NJ, USA: IEEE , 2007, p. 171-178Conference paper, Published paper (Refereed)
    Abstract [en]

    In this paper we present an in situ evaluation of a haptic system, with a representative test population, we aim to determine what, if any, benefit haptics can have in a biomolecular education context. We have developed a haptic application for conveying concepts of molecular interactions, specifically in protein-ligand docking. Utilizing a semi-immersive environment with stereo graphics, users are able to manipulate the ligand and feel its interactions in the docking process. The evaluation used cognitive knowledge tests and interviews focused on learning gains. Compared with using time efficiency as the single quality measure this gives a better indication of a system's applicability in an educational environment. Surveys were used to gather opinions and suggestions for improvements. Students do gain from using the application in the learning process but the learning appears to be independent of the addition of haptic feedback. However the addition of force feedback did decrease time requirements and improved the students understanding of the docking process in terms of the forces involved, as is apparent from the students' descriptions of the experience. The students also indicated a number of features which could be improved in future development.

    Place, publisher, year, edition, pages
    Piscataway, NJ, USA: IEEE, 2007
    Keywords
    Haptic Interaction, Haptics, Virtual Reality, Computer-assisted instruction, Life Science Education, Protein Interactions, Visualization, Protein-ligand docking
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-39934 (URN)10.1109/VR.2007.352478 (DOI)000245919300022 ()51733 (Local ID)1-4244-0906-3 (ISBN)51733 (Archive number)51733 (OAI)
    Conference
    IEEE Virtual Reality Conference, Charlotte, NC, USA, 10-14 March 2007
    Note

    ©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Petter Bivall Persson, Matthew Cooper, Lena Tibell, Shaaron Ainsworth, Anders Ynnerman and Bengt-Harald Jonsson, Designing and Evaluating a Haptic System for Biomolecular Education, 2007, IEEE Virtual Reality Conference 2007, 171-178. http://dx.doi.org/10.1109/VR.2007.352478

    Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2016-05-04Bibliographically approved
    2. Improved Feature Detection over Large Force Ranges Using History Dependent Transfer Functions
    Open this publication in new window or tab >>Improved Feature Detection over Large Force Ranges Using History Dependent Transfer Functions
    Show others...
    2009 (English)In: Third Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environments and Teleoperator Systems, WorldHaptics 2009, IEEE , 2009, p. 476-481Conference paper, Published paper (Refereed)
    Abstract [en]

    In this paper we present a history dependent transfer function (HDTF) as a possible approach to enable improved haptic feature detection in high dynamic range (HDR) volume data. The HDTF is a multi-dimensional transfer function that uses the recent force history as a selection criterion to switch between transfer functions, thereby adapting to the explored force range. The HDTF has been evaluated using artificial test data and in a realistic application example, with the HDTF applied to haptic protein-ligand docking. Biochemistry experts performed docking tests, and expressed that the HDTF delivers the expected feedback across a large force magnitude range, conveying both weak attractive and strong repulsive protein-ligand interaction forces. Feature detection tests have been performed with positive results, indicating that the HDTF improves the ability of feature detection in HDR volume data as compared to a static transfer function covering the same range.

    Place, publisher, year, edition, pages
    IEEE, 2009
    Keywords
    Haptics, Virtual Reality, Scientific Visualization
    National Category
    Interaction Technologies
    Identifiers
    urn:nbn:se:liu:diva-45355 (URN)10.1109/WHC.2009.4810843 (DOI)81912 (Local ID)978-1-4244-3858-7 (ISBN)81912 (Archive number)81912 (OAI)
    Conference
    Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems. World Haptics 2009.Salt Lake City, UT, USA, 18-20 March 2009
    Projects
    VisMolLS
    Note

    ©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Petter Bivall Persson, Gunnar E. Höst, Matthew D. Cooper, Lena A. E. Tibell and Anders Ynnerman, Improved Feature Detection over Large Force Ranges Using History Dependent Transfer Functions, 2009, Third Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environments and Teleoperator Systems, WorldHaptics 2009, 476-481. http://dx.doi.org/10.1109/WHC.2009.4810843

    Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2016-05-04Bibliographically approved
    3. Do Haptic Representations Help Complex Molecular Learning?
    Open this publication in new window or tab >>Do Haptic Representations Help Complex Molecular Learning?
    2011 (English)In: Science Education, ISSN 0036-8326, E-ISSN 1098-237X, Vol. 95, no 4, p. 700-719Article in journal (Refereed) Published
    Abstract [en]

    This study explored whether adding a haptic interface (that provides users with somatosensory information about virtual objects by force and tactile feedback) to a three-dimensional (3D) chemical model enhanced students' understanding of complex molecular interactions. Two modes of the model were compared in a between-groups pre- and posttest design. In both modes, users could move and rotate virtual 3D representations of the chemical structures of the two molecules, a protein and a small ligand molecule. In addition, in a haptic mode users could feel the interactions (repulsive and attractive) between molecules as forces with a haptic device. Twenty postgraduate students (10 in each condition) took pretests about the process of protein--ligand recognition before exploring the model in ways suggested by structured worksheets and then completing a posttest. Analysis addressed quantitative learning outcomes and more qualitatively students' reasoning during the learning phase. Results showed that the haptic system helped students learn more about the process of protein–ligand recognition and changed the way they reasoned about molecules to include more force-based explanations. It may also have protected students from drawing erroneous conclusions about the process of protein–ligand recognition observed when students interacted with only the visual model.

    Keywords
    Haptic learning, multimodality, molecular interactions, protein-ligand docking
    National Category
    Didactics Biochemistry and Molecular Biology Media and Communication Technology
    Identifiers
    urn:nbn:se:liu:diva-60354 (URN)10.1002/sce.20439 (DOI)
    Projects
    VisMolLS
    Available from: 2010-10-12 Created: 2010-10-12 Last updated: 2018-01-12
    4. Using logging data to visualize and explore students’ interaction and learning with a haptic virtual model of protein-ligand docking
    Open this publication in new window or tab >>Using logging data to visualize and explore students’ interaction and learning with a haptic virtual model of protein-ligand docking
    (English)Manuscript (preprint) (Other academic)
    Abstract [en]

    This study explores students’ interaction and learning with a haptic virtual model of biomolecular recognition. Twenty students assigned to a haptics or no-haptics condition performed a protein-ligand docking task where interaction was captured in log files. Any improvement in understanding of recognition was measured by comparing written responses to a conceptual question before and after interaction. A log-profiling tool visualized students’ traversal of the ligand while multivariate parallel coordinate analyses uncovered trends in the data. Students who experienced force feedback (haptics) displayed docked positions that were more clustered in comparison with no-haptics students, coupled to docking profiles that depicted a more focused traversal of the ligand. Students in the no-haptics condition employed double the amount of behaviours concerned with switching between multiple visual representations offered by the system. In the no-haptics group, this visually intense processing was associated with ‘fitting’ the ligand closer distances to the surface of the protein. A negative relationship between high representational switching activity and learning gain as well as spatial aptitude was also revealed. From an information-processing perspective, visual and haptic coordination could permit engagement of each perceptual channel simultaneously, in effect offloading the visual pathway by placing less strain on visual working memory.

    Keywords
    Interactive learning environments; multimedia systems; pedagogical issues; postsecondary education; virtual reality
    National Category
    Natural Sciences
    Identifiers
    urn:nbn:se:liu:diva-60355 (URN)
    Available from: 2010-10-12 Created: 2010-10-12 Last updated: 2016-05-04
    5. Haptic Just Noticeable Difference in Continuous Probing of Volume Data
    Open this publication in new window or tab >>Haptic Just Noticeable Difference in Continuous Probing of Volume Data
    2010 (English)Report (Other academic)
    Abstract [en]

    Just noticeable difference (JND) describes how much two perceptual sensory inputs must differ in order to be distinguishable from each other. Knowledge of the JND is vital when two features in a dataset are to be separably represented. JND has received a lot of attention in haptic research and this study makes a contribution to the field by determining JNDs during users' probing of volumetric data at two force levels. We also investigated whether these JNDs were affected by where in the haptic workspace the probing occurred. Reference force magnitudes were 0.1 N and 0.8 N, and the volume data was presented in rectangular blocks positioned at the eight corners of a cube 10 cm3 in size. Results showed that the JNDs varied significantly for the two force levels, with mean values of 38.5% and 8.8% obtained for the 0.1 N and 0.8 N levels, respectively, and that the JND was influenced by where the data was positioned.

    Place, publisher, year, edition, pages
    Linköping: Linköping University Electronic Press, 2010. p. 19
    Series
    Technical reports in Computer and Information Science, ISSN 1654-7233 ; 6
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-58011 (URN)
    Available from: 2010-07-16 Created: 2010-07-16 Last updated: 2010-10-12Bibliographically approved
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    Touching the Essence of Life : Haptic Virtual Proteins for Learning
    Download (pdf)
    Cover
  • 156.
    Bivall, Petter
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Ainsworth, Shaaron
    School of Psychology, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K..
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Do Haptic Representations Help Complex Molecular Learning?2011In: Science Education, ISSN 0036-8326, E-ISSN 1098-237X, Vol. 95, no 4, p. 700-719Article in journal (Refereed)
    Abstract [en]

    This study explored whether adding a haptic interface (that provides users with somatosensory information about virtual objects by force and tactile feedback) to a three-dimensional (3D) chemical model enhanced students' understanding of complex molecular interactions. Two modes of the model were compared in a between-groups pre- and posttest design. In both modes, users could move and rotate virtual 3D representations of the chemical structures of the two molecules, a protein and a small ligand molecule. In addition, in a haptic mode users could feel the interactions (repulsive and attractive) between molecules as forces with a haptic device. Twenty postgraduate students (10 in each condition) took pretests about the process of protein--ligand recognition before exploring the model in ways suggested by structured worksheets and then completing a posttest. Analysis addressed quantitative learning outcomes and more qualitatively students' reasoning during the learning phase. Results showed that the haptic system helped students learn more about the process of protein–ligand recognition and changed the way they reasoned about molecules to include more force-based explanations. It may also have protected students from drawing erroneous conclusions about the process of protein–ligand recognition observed when students interacted with only the visual model.

  • 157.
    Bivall, Petter
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Forsell, Camilla
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Haptic Just Noticeable Difference in Continuous Probing of Volume Data2010Report (Other academic)
    Abstract [en]

    Just noticeable difference (JND) describes how much two perceptual sensory inputs must differ in order to be distinguishable from each other. Knowledge of the JND is vital when two features in a dataset are to be separably represented. JND has received a lot of attention in haptic research and this study makes a contribution to the field by determining JNDs during users' probing of volumetric data at two force levels. We also investigated whether these JNDs were affected by where in the haptic workspace the probing occurred. Reference force magnitudes were 0.1 N and 0.8 N, and the volume data was presented in rectangular blocks positioned at the eight corners of a cube 10 cm3 in size. Results showed that the JNDs varied significantly for the two force levels, with mean values of 38.5% and 8.8% obtained for the 0.1 N and 0.8 N levels, respectively, and that the JND was influenced by where the data was positioned.

    Download full text (pdf)
    Haptic Just Noticeable Difference in Continuous Probing of Volume Data
  • 158.
    Bivik Stadler, Caroline
    et al.
    Linköping University, Department of Health, Medicine and Caring Sciences, Division of Diagnostics and Specialist Medicine. Linköping University, Faculty of Medicine and Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    Lindvall, Martin
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Sectra AB, Tekn Ringen 20, SE-58330 Linkoping, Sweden.
    Lundström, Claes
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV). Sectra AB, Tekn Ringen 20, SE-58330 Linkoping, Sweden.
    Boden, Anna
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Neurobiology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Clinical pathology. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    Lindman, Karin
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Neurobiology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Clinical pathology.
    Rose, Jeronimo
    Linköping University, Center for Medical Image Science and Visualization (CMIV). Linköping University, Faculty of Medicine and Health Sciences.
    Treanor, Darren
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Inflammation and Infection. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Clinical pathology. Linköping University, Center for Medical Image Science and Visualization (CMIV). Leeds Teaching Hosp NHS Trust, England; Univ Leeds, England.
    Blomma, Johan
    Region Östergötland, Center for Diagnostics, Department of Radiology in Linköping.
    Stacke, Karin
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Sectra AB, Tekn Ringen 20, SE-58330 Linkoping, Sweden.
    Pinchaud, Nicolas
    ContextVision AB, Sweden.
    Hedlund, Martin
    ContextVision AB, Sweden.
    Landgren, Filip
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Clinical Chemistry. Linköping University, Faculty of Medicine and Health Sciences.
    Woisetschläger, Mischa
    Linköping University, Department of Health, Medicine and Caring Sciences, Division of Diagnostics and Specialist Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Department of Radiology in Linköping. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    Forsberg, Daniel
    Sectra AB, Tekn Ringen 20, SE-58330 Linkoping, Sweden.
    Proactive Construction of an Annotated Imaging Database for Artificial Intelligence Training2021In: Journal of digital imaging, ISSN 0897-1889, E-ISSN 1618-727X, Vol. 34, p. 105-115Article in journal (Refereed)
    Abstract [en]

    Artificial intelligence (AI) holds much promise for enabling highly desired imaging diagnostics improvements. One of the most limiting bottlenecks for the development of useful clinical-grade AI models is the lack of training data. One aspect is the large amount of cases needed and another is the necessity of high-quality ground truth annotation. The aim of the project was to establish and describe the construction of a database with substantial amounts of detail-annotated oncology imaging data from pathology and radiology. A specific objective was to be proactive, that is, to support undefined subsequent AI training across a wide range of tasks, such as detection, quantification, segmentation, and classification, which puts particular focus on the quality and generality of the annotations. The main outcome of this project was the database as such, with a collection of labeled image data from breast, ovary, skin, colon, skeleton, and liver. In addition, this effort also served as an exploration of best practices for further scalability of high-quality image collections, and a main contribution of the study was generic lessons learned regarding how to successfully organize efforts to construct medical imaging databases for AI training, summarized as eight guiding principles covering team, process, and execution aspects.

    Download full text (pdf)
    fulltext
  • 159.
    Bjarnle, Johan
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Holmström, Elias
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Implementation and Evaluation of Historical Consistent Neural Networks Using Parallel Computing2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Forecasting the stock market is well-known to be a very complex and difficult task, and even by many considered to be impossible. The new model, emph{Historical Consistent Neural Networks} (HCNN), has recently been successfully applied for prediction and risk estimation on the energy markets. HCNN is developed by Dr. Hans Georg Zimmermann, Siemens AG, Corporate Technology Dpt., Munich, and implemented in the SENN (Simulation Environment for Neural Network) package, distributed by Siemens. The evalution is made by tests on a large database of historical price data for global indicies, currencies, commodities and interest rates. Tests have been done, using the Linux version of the SENN package, provided by Dr. Zimmermann and his research team. This thesis takes on the task given by Eturn Fonder AB, to develop a sound basis for evaluating and using HCNN, in a fast and easy manner. An important part of our work has been to develop a rapid and improved implementation of HCNN, as an interactive software package. Our approach has been to take advantage of the parallelization capabilities of the graphics card, using the CUDA library together with an intuitive and flexible interface for HCNN built in MATLAB. We can show that the computational power of our CUDA implementation (using a cheap graphics device), compared to SENN, is about 33 times faster. With our new optimized implementation of HCNN, we have been able to test the model on large data sets, consisting of multidimensional financial time series. We present the results with respect to some common statistical measures, evaluates the prediction qualities and performance of HCNN, and give our analysis of how to move forward and do further testing.

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    fulltext
  • 160.
    Björkman, Anna
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Logotypens relationer - att designa en logotyp för ett undervarumärke2018Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study is to create a new logotype for the student-run organisation LinTek Näringsliv (LinTek Corporate Relations), a sub-brand of the Union of Science and Technology Students at Linköping University, by means of research through design. The course of the design work followed a defined process and began with a pre-study, establishing the group’s current situation, their value words and wishes for the design. After a time an evaluation, in the form of a questionnaire distributed to the target audience, was made to review whether the new logotype had achieved its goals. The results show that the respondents, overall, have a neutral or positive view of the design, that the visual connection to LinTek is visible and that it now is more difficult to confuse LinTek Näringsliv with LARM. The existing theories regarding logotype and brand design are therefore proven to be true in this study.

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    Logotypens relationer - att designa en logotyp för ett undervarumärke
  • 161.
    Björkman, Hanna
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Designing a board game rulebook – It is harder than you would think2019Independent thesis Basic level (university diploma), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    This thesis has explored how to create a board game rulebook, for the board game Curators, in order to facilitate learning the rules as well as reminding players of the rules. This was done via research through design. The design of a rulebook incorporates many parts of design theory, from layout and typography to the use of color, gestalt principles, and images. All these were combined with knowledge about how existing rulebooks convey rules and the way board gamers use rulebooks, gained through the pre-study, in order to create a rulebook for the coming board game Curators. The analysis of this study shows that the resulting rulebook was successful in both teaching the game and helping players look up rules, though improvements could still be made to make it better. It was concluded that the use of many iterations of designing and testing is ideal for creating a rulebook with as few issues as possible.

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    Designing
  • 162.
    Björkmyr, Nina
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Ketzénius, Mira
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Där livet händer - how storytelling is used to convey a message2019Independent thesis Basic level (university diploma), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    Med en vision att skapa en bättre vardag för de många människorna är IKEA idag en av världens största varumärken inom heminredning. Med hjälp av storytelling kan ett företag förmedla vilka kärnvärden de har. IKEA tillämpar storytelling genom reklamkampanjen Där livet händer, med syfte att beröra målgruppen 19-49 år. Syftet med denna studie är att undersöka hur IKEA arbetar med storytelling för att uttrycka sina kärnvärden. Vidare undersöker studien om mottagarna blir berörda, hur mottagarna tolkar reklamkampanjen och om det överensstämmer med IKEAs vision. Förstudien inleddes med en telefonintervju med Maria Granath, ansvarig för extern kommunikation vid IKEA. Därefter utfördes sex kvalitativa semistrukturerade intervjuer, som kompletterades med en enkät där 82 respondenter svarade. Resultatet av studien visar att igenkänning inte är en nödvändig faktor för att mottagaren ska bli berörd, då mottagaren istället kan bli narrativt transporterad. Däremot krävs det att berättelsen är trovärdig, då äldre oftast är mer kritiska och har svårare att bli narrativt transporterade. För att berättelsen ska anses trovärdig krävs det att händelseförloppet och karaktärerna är det, och därmed är dessa de viktigaste faktorerna om en berättelse ska beröra.

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    Där livet händer - how storytelling is used to convey a message
  • 163.
    Björkqvist, Sara
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    A comparative study between factual animation and cartoon animation in a learning context2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Film har påvisats vara en populär metod för effektiv inlärning men inga tidigare undersökningar berör hur den visuella stilen av film i undervisning kan påverka inlärningen. Denna studie går därför ut på att undersöka skillnaderna mellan en saklig, informativ animerad film och en cartoon-animerad film i hur de fungerar och uppfattas i ett lärandesammanhang. Studien innefattar en litteratursökning kring multimediainlärning, kommunikation i film och animationsprinciper som sedan mynnat ut i två animerade filmer, en saklig och en med cartoon-karaktär. Dessa filmer har jämförts i kvalitativa användartester med en högstadieklass för att undersöka förståelsen och uppfattningen kring filmerna. Slutsatserna från studien är att båda filmerna skulle passa i ett lärandesammanhang, dock krävs en djupare och större undersökning för att förstå hur de olika filmerna påverkat inlärningen. Den största skillnaden mellan filmerna ligger i hur underhållande de upplevs, den cartoon-animerade filmen upplevs vara roligare och väcker intresset hos många av testpersonerna, dock upplevde flera att den även var distraherande och att de fokuserade mer på underhållningen än faktan som presenterades. För att fullt svara på syftet krävs en fortsatt studie kring ämnet.

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  • 164.
    Bladin, Kalle
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Axelsson, Emil
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Broberg, Erik
    Linköping University, Faculty of Science & Engineering.
    Emmart, Carter
    Amer Museum Nat Hist, NY 10024 USA.
    Ljung, Patric
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Bock, Alexander
    Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering. NYU, NY 10003 USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Globe Browsing: Contextualized Spatio-Temporal Planetary Surface Visualization2018In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 24, no 1, p. 802-811Article in journal (Refereed)
    Abstract [en]

    Results of planetary mapping are often shared openly for use in scientific research and mission planning. In its raw format, however, the data is not accessible to non-experts due to the difficulty in grasping the context and the intricate acquisition process. We present work on tailoring and integration of multiple data processing and visualization methods to interactively contextualize geospatial surface data of celestial bodies for use in science communication. As our approach handles dynamic data sources, streamed from online repositories, we are significantly shortening the time between discovery and dissemination of data and results. We describe the image acquisition pipeline, the pre-processing steps to derive a 2.5D terrain, and a chunked level-of-detail, out-of-core rendering approach to enable interactive exploration of global maps and high-resolution digital terrain models. The results are demonstrated for three different celestial bodies. The first case addresses high-resolution map data on the surface of Mars. A second case is showing dynamic processes. such as concurrent weather conditions on Earth that require temporal datasets. As a final example we use data from the New Horizons spacecraft which acquired images during a single flyby of Pluto. We visualize the acquisition process as well as the resulting surface data. Our work has been implemented in the OpenSpace software [8], which enables interactive presentations in a range of environments such as immersive dome theaters. interactive touch tables. and virtual reality headsets.

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  • 165.
    Bladin, Kalle
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Broberg, Erik
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Design and Implementation of an Out-of-Core Globe Rendering System Using Multiple Map Services2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis focuses on the design and implementation of a software system enabling out-of-core rendering of multiple map datasets mapped on virtual globes around our solar system. Challenges such as precision, accuracy, curvature and massive datasets were considered. The result is a globe visualization software using a chunked level of detail approach for rendering. The software can render texture layers of various sorts to aid in scientific visualization on top of height mapped geometry, yielding accurate visualizations rendered at interactive frame rates. The project was conducted at the American Museum of Natural History (AMNH), New York and serves the goal of implementing a planetary visualization software to aid in public presentations and bringing space science to the public. The work is part of the development of the software OpenSpace, which is the result of a collaboration between Linköping University, AMNH and the National Aeronautics and Space Administration (NASA) among others.

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  • 166.
    Blascheck, Tanja
    et al.
    Univ Stuttgart, Germany.
    Besançon, Lonni
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Monash Univ, Australia.
    Bezerianos, Anastasia
    Univ Paris Saclay, France.
    Lee, Bongshin
    Microsoft Res, NY USA.
    Islam, Alaul
    Univ Paris Saclay, France.
    He, Tingying
    Univ Paris Saclay, France.
    Isenberg, Petra
    Univ Paris Saclay, France.
    Studies of Part-to-Whole Glanceable Visualizations on Smartwatch Faces2023In: 2023 IEEE 16TH PACIFIC VISUALIZATION SYMPOSIUM, PACIFICVIS, IEEE COMPUTER SOC , 2023, p. 187-196Conference paper (Refereed)
    Abstract [en]

    We present three studies that investigate the effectiveness of multiple glanceable part-to-whole proportion representations on smartwatch faces. Our goal was to understand how quickly and accurately people can make judgments about their progress toward multiple goals displayed in a small space. We designed our three studies with increasing external validity. The first study compared bar charts, radial bar charts, and text representations-shown with a digital time display. The second study added an analog time dial as a distractor to increase the complexity of the watch face. To emulate realistic viewing conditions, the third study investigated the effect of viewing angles. In Study 1 bar and radial bar charts outperformed text representations, in Study 2 adding an analog time dial as a distractor did not affect task performance, and in Study 3 only the most extreme angle led to some performance decrease. Supplementary material is available at https://osf.io/ad2z7/.

  • 167.
    Blom, Lucas
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Stenbäck, Johanna
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    The golden ratio - still golden? A research of the gold ratio in digital formats2015Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Gyllene snittet har sedan en mycket lång tid tillbaka använts som begrepp för att beskriva en proportion som är behaglig för det mänskliga ögat. Proportionen har dels använts för att formge byggnader och måla konstverk men används som flitigast i den grafiska branshen. Då främst gällande affisher och andra format av trycksaker där det är viktigt att läsaren känner att en harmoni existerar. Webbdesign är ett relativt nytt ämne och handlar om hur en webbsida formges, webbsidor har idag många olika uttryck och funktioner och nästan alla människor i Sverige vet vad en webbsida är och vad man använder den till. Syftet med denna studie är att ta reda på hurvida användningen av gyllene snittet på webbsidor ändrar användarens upplevelse samt att kartlägga om gyllene snittet används på de tio mest besökta webbsidorna i Sverige. För att svara på syftet har semistrukturerade intervjuer gjorts för att samla in data. Dessa intervjuer har gått ut på att deltagaren fått se och jämföra bilder på webbsidor. En del av bilderna har varit med orginallayout och en del har varit med gyllene snittet applicerat. Deltagarna har fått titta på bilderna en och en men också samtidigt för att kunna jämföra. Studiens intervjuer har fokuserat på känslor kring bilderna, och hur betraktaren uppfattar det som hen sett framför sig.

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  • 168.
    Blyckert, Lisa
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Att förpacka en positiv association - Att designa en kondomvarumärkesförpackning som ger positiva associationer och genom det minskar det jobba i en köpsituation för ungdomar2017Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [sv]

    Kondomer är ett preventivmedel som både skyddar mot sexuellt överförbara sjukdomar och graviditet, det kan användas av alla och är enkelt att få tag på. Ändå är Sveriges ungdomar bland de sämsta i Europa på att använda kondomer. Det är pinsamt, säger många. Pinsamt att prata om, pinsamt att inneha och pinsamt att köpa. Den här studien syftar därför till att undersöka hur ett kondomvarumärke kan se ut för att det ska kännas mindre pinsamt för ungdomar att köpa i butik och istället ge positiva associationer. Genom designforskning togs en kondomförpackning fram, vars utseende baserades på trendspaning, designanalyser och enkätundersökningar som ledde fram ett antal värdeord. Designen värderades på 15 ungdomar utifrån överensstämmande med associationer och hur den skulle kännas att köpa i butik. Utifrån det kunde det konstateras att en ljus förpackning med en avslappnad tonalitet och ett diskret uttryck uppskattades av målgruppen och var att föredra över de kondomvarumärken som fanns idag. Ett humoristiskt namn, mjuk typografi, sparsam information och en lugnande färganvändning tillsammans ett ljust uttryck och en rak-på-sak-tonalitet i text blev beståndsdelarna i det fiktiva kondomvarumärket “NAJS”.

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    The way a brand for condoms could look to gain positive associations and through that make the buying situation less awkward for youths
  • 169.
    Blåwiik, Per
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Fusing Stereo Measurements into a Global 3D Representation2021Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The report describes the thesis project with the aim of fusing an arbitrary sequence of stereo measurements into a global 3D representation in real-time. The proposed method involves an octree-based signed distance function for representing the 3D environment, where the geomtric data is fused together using a cumulative weighted update function, and finally rendered by incremental mesh extraction using the marching cubes algorithm. The result of the project was a prototype system, integrated into a real-time stereo reconstruction system, which was evaluated by benchmark tests as well as qualitative comparisons with an older method of overlapping meshes.

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  • 170.
    Boberg, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Stormwater study Linköping City Airport2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The airline industry is an important part of Linköping's industry, with Saab as one of the city's largest companies and employers. Adjacent to Saab is Linkoping City Airport, which air traffic is shared by both the civilian and military traffic from Saab.

    In 2014 the paving for the airport runway need to be replaced and in conjunction with the renewal there are plans for an expansion of the runway. Either by just widen the lane or also extending the lane with 600 meters to the southeast.

    The biggest reason for Linköping City Airport to expand their runway is to accommodate larger airplanes. While renewing the runway the current stormwater system needs to revised as many parts of the runway gets flooded in heavy rain. The system also needs an upgrade to be able to handle an increase in stormwater. A fundamental solution how to solve storm water management is presented in the report. The report also addresses some problems that remain to be solved.

    The report describes stormwater planning in general and also the planning for the rebuilding of the runway at Linkoping City Airport. To limit the work only one suggestion is processed in the report. The suggestion with both a broadening and extension of the runway is presented to see if it is possible to drain the stormwater from the entire runway to the west. A requirement throughout the planning has been that the new system can't add more stormwater than it does today to the current system in the western part of the airport. Therefore the volume for a detention storage has been calculated.

    The rational method has been used for sizing the pipes. For the calculations of the detention storage flow time has been taken into account.

    The result of the planning indicates that there are large amounts of stormwater that will be needed to be delayed. The result is presented in a number of plan and profile drawings showing the location of selected wells and pipes in both horizontally and vertically perspective. The result of the planning also shows that it is quite possible to divert surface water to the western parts of the airport, with the help of gravity. However a disadvantage is that the amount of surface water that needs to be delayed is about 1500 cubic meters, and space to construct the detention storage is scarce.

    The conclusion of the work is that the project requires additional planning and multiple options for the horizontal planning of the stormwater system to find the solution that has the highest economical sustainability. Costs need to be considered in the planning, and there needs to be an economic reasonableness if the airport is going to expand in 2014.

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  • 171. Order onlineBuy this publication >>
    Bock, Alexander
    Linköping University, Faculty of Science & Engineering. Linköping University, Department of Science and Technology, Media and Information Technology.
    Tailoring visualization applications for tasks and users2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Exponential increases in available computational resources over the recent decades have fueled an information explosion in almost every scientific field. This has led to a societal change shifting from an information-poor research environment to an over-abundance of information. As many of these cases involve too much information to directly comprehend, visualization proves to be an effective tool to gain insight into these large datasets. While visualization has been used since the beginning of mankind, its importance is only increasing as the exponential information growth widens the difference between the amount of gathered data and the relatively constant human ability to ingest information. Visualization, as a methodology and tool of transforming complex data into an intuitive visual representation can leverage the combined computational resources and the human cognitive capabilities in order to mitigate this growing discrepancy.

    A large portion of visualization research is, directly or indirectly, targets users in an application domain, such as medicine, biology, physics, or others. Applied research is aimed at the creation of visualization applications or systems that solve a specific problem within the domain. Combining prior research and applying it to a concrete problem enables the possibility to compare and determine the usability and usefulness of existing visualization techniques. These applications can only be effective when the domain experts are closely involved in the design process, leading to an iterative workflow that informs its form and function. These visualization solutions can be separated into three categories: Exploration, in which users perform an initial study of data, Analysis, in which an established technique is repeatedly applied to a large number of datasets, and Communication in which findings are published to a wider public audience.

    This thesis presents five examples of application development in finite element modeling, medicine, urban search & rescue, and astronomy and astrophysics. For the finite element modeling, an exploration tool for simulations of stress tensors in a human heart uses a compression method to achieve interactive frame rates. In the medical domain, an analysis system aimed at guiding surgeons during Deep Brain Stimulation interventions fuses multiple modalities in order to improve their outcome. A second analysis application is targeted at the Urban Search & Rescue community supporting the extraction of injured victims and enabling a more sophisticated decision making strategy. For the astronomical domain, first, an exploration application enables the analysis of time-varying volumetric plasma simulations to improving these simulations and thus better predict space weather. A final system focusses on combining all three categories into a single application that enables the same tools to be used for Exploration, Analysis, and Communication, thus requiring the handling of large coordinate systems, and high-fidelity rendering of planetary surfaces and spacecraft operations.

    List of papers
    1. Coherency-Based Curve Compression for High-Order Finite Element Model Visualization
    Open this publication in new window or tab >>Coherency-Based Curve Compression for High-Order Finite Element Model Visualization
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    2012 (English)In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 18, no 12, p. 2315-2324Article in journal (Refereed) Published
    Abstract [en]

    Finite element (FE) models are frequently used in engineering and life sciences within time-consuming simulations. In contrast with the regular grid structure facilitated by volumetric data sets, as used in medicine or geosciences, FE models are defined over a non-uniform grid. Elements can have curved faces and their interior can be defined through high-order basis functions, which pose additional challenges when visualizing these models. During ray-casting, the uniformly distributed sample points along each viewing ray must be transformed into the material space defined within each element. The computational complexity of this transformation makes a straightforward approach inadequate for interactive data exploration. In this paper, we introduce a novel coherency-based method which supports the interactive exploration of FE models by decoupling the expensive world-to-material space transformation from the rendering stage, thereby allowing it to be performed within a precomputation stage. Therefore, our approach computes view-independent proxy rays in material space, which are clustered to facilitate data reduction. During rendering, these proxy rays are accessed, and it becomes possible to visually analyze high-order FE models at interactive frame rates, even when they are time-varying or consist of multiple modalities. Within this paper, we provide the necessary background about the FE data, describe our decoupling method, and introduce our interactive rendering algorithm. Furthermore, we provide visual results and analyze the error introduced by the presented approach.

    Place, publisher, year, edition, pages
    Institute of Electrical and Electronics Engineers (IEEE), 2012
    Keywords
    Finite element visualization, GPU-base dray-casting
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-86633 (URN)10.1109/TVCG.2012.206 (DOI)000310143100035 ()
    Note

    Funding Agencies|Swedish Research Council (VR)|2011-4113|Excellence Center at Linkoping and Lund in Information Technology (ELLIIT)||Swedish e-Science Research Centre (SeRC)||

    Available from: 2012-12-20 Created: 2012-12-20 Last updated: 2018-05-21
    2. Guiding Deep Brain Stimulation Interventions by Fusing Multimodal Uncertainty Regions
    Open this publication in new window or tab >>Guiding Deep Brain Stimulation Interventions by Fusing Multimodal Uncertainty Regions
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    2013 (English)Conference paper, Published paper (Other academic)
    Abstract [en]

    Deep Brain Stimulation (DBS) is a surgical intervention that is known to reduce or eliminate the symptoms of common movement disorders, such as Parkinson.s disease, dystonia, or tremor. During the intervention the surgeon places electrodes inside of the patient.s brain to stimulate speci.c regions. Since these regions span only a couple of millimeters, and electrode misplacement has severe consequences, reliable and accurate navigation is of great importance. Usually the surgeon relies on fused CT and MRI data sets, as well as direct feedback from the patient. More recently Microelectrode Recordings (MER), which support navigation by measuring the electric .eld of the patient.s brain, are also used. We propose a visualization system that fuses the different modalities: imaging data, MER and patient checks, as well as the related uncertainties, in an intuitive way to present placement-related information in a consistent view with the goal of supporting the surgeon in the .nal placement of the stimulating electrode. We will describe the design considerations for our system, the technical realization, present the outcome of the proposed system, and provide an evaluation.

    Place, publisher, year, edition, pages
    IEEE conference proceedings, 2013
    National Category
    Computer Sciences
    Identifiers
    urn:nbn:se:liu:diva-92857 (URN)10.1109/PacificVis.2013.6596133 (DOI)000333746600013 ()9781467347976 (ISBN)
    Conference
    IEEE Pacific Visualization, 26 February - 1 March 2013, Sydney, Australia
    Funder
    ELLIIT - The Linköping‐Lund Initiative on IT and Mobile CommunicationsSwedish e‐Science Research CenterSwedish Research Council, 2011-4113
    Available from: 2013-05-27 Created: 2013-05-27 Last updated: 2018-05-21
    3. Supporting Urban Search & Rescue Mission Planning through Visualization-Based Analysis
    Open this publication in new window or tab >>Supporting Urban Search & Rescue Mission Planning through Visualization-Based Analysis
    2014 (English)In: Proceedings of the Vision, Modeling, and Visualization Conference 2014, Eurographics - European Association for Computer Graphics, 2014Conference paper, Published paper (Refereed)
    Abstract [en]

    We propose a visualization system for incident commanders in urban search~\&~rescue scenarios that supports access path planning for post-disaster structures. Utilizing point cloud data acquired from unmanned robots, we provide methods for assessment of automatically generated paths. As data uncertainty and a priori unknown information make fully automated systems impractical, we present a set of viable access paths, based on varying risk factors, in a 3D environment combined with the visual analysis tools enabling informed decisions and trade-offs. Based on these decisions, a responder is guided along the path by the incident commander, who can interactively annotate and reevaluate the acquired point cloud to react to the dynamics of the situation. We describe design considerations for our system, technical realizations, and discuss the results of an expert evaluation.

    Place, publisher, year, edition, pages
    Eurographics - European Association for Computer Graphics, 2014
    National Category
    Computer Sciences
    Identifiers
    urn:nbn:se:liu:diva-117772 (URN)10.2312/vmv.20141275 (DOI)978-3-905674-74-3 (ISBN)
    Conference
    Vision, Modeling, and Visualization
    Projects
    ELLIIT; VR; SeRC
    Funder
    ELLIIT - The Linköping‐Lund Initiative on IT and Mobile CommunicationsSwedish e‐Science Research CenterSwedish Research Council, 2011-4113
    Available from: 2015-05-08 Created: 2015-05-08 Last updated: 2018-05-21Bibliographically approved
    4. An interactive visualization system for urban search & rescue mission planning
    Open this publication in new window or tab >>An interactive visualization system for urban search & rescue mission planning
    2014 (English)In: 12th IEEE International Symposium on Safety, Security and Rescue Robotics, SSRR 2014 - Symposium Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2014, no 7017652Conference paper, Published paper (Refereed)
    Abstract [en]

    We present a visualization system for incident commanders in urban search and rescue scenarios that supports the inspection and access path planning in post-disaster structures. Utilizing point cloud data acquired from unmanned robots, the system allows for assessment of automatically generated paths, whose computation is based on varying risk factors, in an interactive 3D environment increasing immersion. The incident commander interactively annotates and reevaluates the acquired point cloud based on live feedback. We describe design considerations, technical realization, and discuss the results of an expert evaluation that we conducted to assess our system.

    Place, publisher, year, edition, pages
    Institute of Electrical and Electronics Engineers Inc., 2014
    Series
    12th IEEE International Symposium on Safety, Security and Rescue Robotics, SSRR 2014 - Symposium Proceedings
    National Category
    Electrical Engineering, Electronic Engineering, Information Engineering
    Identifiers
    urn:nbn:se:liu:diva-116761 (URN)10.1109/SSRR.2014.7017652 (DOI)2-s2.0-84923174457 (Scopus ID)9781479941995 (ISBN)
    Conference
    12th IEEE International Symposium on Safety, Security and Rescue Robotics, SSRR 2014
    Available from: 2015-04-02 Created: 2015-04-02 Last updated: 2018-05-21
    5. A Visualization-Based Analysis System for Urban Search & Rescue Mission Planning Support
    Open this publication in new window or tab >>A Visualization-Based Analysis System for Urban Search & Rescue Mission Planning Support
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    2017 (English)In: Computer graphics forum (Print), ISSN 0167-7055, E-ISSN 1467-8659, Vol. 36, no 6, p. 148-159Article in journal (Refereed) Published
    Abstract [en]

    We propose a visualization system for incident commanders (ICs) in urban searchandrescue scenarios that supports path planning in post-disaster structures. Utilizing point cloud data acquired from unmanned robots, we provide methods for the assessment of automatically generated paths. As data uncertainty and a priori unknown information make fully automated systems impractical, we present the IC with a set of viable access paths, based on varying risk factors, in a 3D environment combined with visual analysis tools enabling informed decision making and trade-offs. Based on these decisions, a responder is guided along the path by the IC, who can interactively annotate and reevaluate the acquired point cloud and generated paths to react to the dynamics of the situation. We describe visualization design considerations for our system and decision support systems in general, technical realizations of the visualization components, and discuss the results of two qualitative expert evaluation; one online study with nine searchandrescue experts and an eye-tracking study in which four experts used the system on an application case.

    Place, publisher, year, edition, pages
    WILEY, 2017
    Keywords
    urban search and rescue decision support application
    National Category
    Computer Sciences
    Identifiers
    urn:nbn:se:liu:diva-140952 (URN)10.1111/cgf.12869 (DOI)000408634200009 ()
    Note

    Funding Agencies|Excellence Center at Linkoping and Lund in Information Technology; Swedish e-Science Research Centre; VR grant [2011-4113]

    Available from: 2017-09-19 Created: 2017-09-19 Last updated: 2020-12-22
    6. Visual Verification of Space Weather Ensemble Simulations
    Open this publication in new window or tab >>Visual Verification of Space Weather Ensemble Simulations
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    2015 (English)In: 2015 IEEE Scientific Visualization Conference (SciVis), IEEE, 2015, p. 17-24Conference paper, Published paper (Refereed)
    Abstract [en]

    We propose a system to analyze and contextualize simulations of coronal mass ejections. As current simulation techniques require manual input, uncertainty is introduced into the simulation pipeline leading to inaccurate predictions that can be mitigated through ensemble simulations. We provide the space weather analyst with a multi-view system providing visualizations to: 1. compare ensemble members against ground truth measurements, 2. inspect time-dependent information derived from optical flow analysis of satellite images, and 3. combine satellite images with a volumetric rendering of the simulations. This three-tier workflow provides experts with tools to discover correlations between errors in predictions and simulation parameters, thus increasing knowledge about the evolution and propagation of coronal mass ejections that pose a danger to Earth and interplanetary travel

    Place, publisher, year, edition, pages
    IEEE, 2015
    National Category
    Computer Sciences Computer Vision and Robotics (Autonomous Systems)
    Identifiers
    urn:nbn:se:liu:diva-128037 (URN)10.1109/SciVis.2015.7429487 (DOI)000380564400003 ()978-1-4673-9785-8 (ISBN)
    Conference
    2015 IEEE Scientific Visualization Conference
    Available from: 2016-05-16 Created: 2016-05-16 Last updated: 2018-07-19
    7. Dynamic Scene Graph: Enabling Scaling, Positioning, and Navigation in the Universe
    Open this publication in new window or tab >>Dynamic Scene Graph: Enabling Scaling, Positioning, and Navigation in the Universe
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    2017 (English)In: Computer graphics forum (Print), ISSN 0167-7055, E-ISSN 1467-8659, Vol. 36, no 3, p. 459-468Article in journal (Refereed) Published
    Abstract [en]

    In this work, we address the challenge of seamlessly visualizing astronomical data exhibiting huge scale differences in distance, size, and resolution. One of the difficulties is accurate, fast, and dynamic positioning and navigation to enable scaling over orders of magnitude, far beyond the precision of floating point arithmetic. To this end we propose a method that utilizes a dynamically assigned frame of reference to provide the highest possible numerical precision for all salient objects in a scene graph. This makes it possible to smoothly navigate and interactively render, for example, surface structures on Mars and the Milky Way simultaneously. Our work is based on an analysis of tracking and quantification of the propagation of precision errors through the computer graphics pipeline using interval arithmetic. Furthermore, we identify sources of precision degradation, leading to incorrect object positions in screen-space and z-fighting. Our proposed method operates without near and far planes while maintaining high depth precision through the use of floating point depth buffers. By providing interoperability with order-independent transparency algorithms, direct volume rendering, and stereoscopy, our approach is well suited for scientific visualization. We provide the mathematical background, a thorough description of the method, and a reference implementation.

    Place, publisher, year, edition, pages
    WILEY, 2017
    National Category
    Computer Vision and Robotics (Autonomous Systems)
    Identifiers
    urn:nbn:se:liu:diva-139628 (URN)10.1111/cgf.13202 (DOI)000404881200042 ()
    Conference
    19th Eurographics/IEEE VGTC Conference on Visualization (EuroVis)
    Note

    Funding Agencies|Swedish e-Science Research Center (SeRC); NASA [NNX16AB93A]; Moore-Sloan Data Science Environment at NYU; NSF [CNS-1229185, CCF-1533564, CNS-1544753]

    Available from: 2017-08-16 Created: 2017-08-16 Last updated: 2018-05-21
    8. Globe Browsing: Contextualized Spatio-Temporal Planetary Surface Visualization
    Open this publication in new window or tab >>Globe Browsing: Contextualized Spatio-Temporal Planetary Surface Visualization
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    2018 (English)In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 24, no 1, p. 802-811Article in journal (Refereed) Published
    Abstract [en]

    Results of planetary mapping are often shared openly for use in scientific research and mission planning. In its raw format, however, the data is not accessible to non-experts due to the difficulty in grasping the context and the intricate acquisition process. We present work on tailoring and integration of multiple data processing and visualization methods to interactively contextualize geospatial surface data of celestial bodies for use in science communication. As our approach handles dynamic data sources, streamed from online repositories, we are significantly shortening the time between discovery and dissemination of data and results. We describe the image acquisition pipeline, the pre-processing steps to derive a 2.5D terrain, and a chunked level-of-detail, out-of-core rendering approach to enable interactive exploration of global maps and high-resolution digital terrain models. The results are demonstrated for three different celestial bodies. The first case addresses high-resolution map data on the surface of Mars. A second case is showing dynamic processes. such as concurrent weather conditions on Earth that require temporal datasets. As a final example we use data from the New Horizons spacecraft which acquired images during a single flyby of Pluto. We visualize the acquisition process as well as the resulting surface data. Our work has been implemented in the OpenSpace software [8], which enables interactive presentations in a range of environments such as immersive dome theaters. interactive touch tables. and virtual reality headsets.

    Place, publisher, year, edition, pages
    Institute of Electrical and Electronics Engineers (IEEE), 2018
    Keywords
    Astronomical visualization; globe rendering; public dissemination. science communication; space mission visualization
    National Category
    Other Computer and Information Science
    Identifiers
    urn:nbn:se:liu:diva-144142 (URN)10.1109/TVCG.2017.2743958 (DOI)000418038400079 ()28866505 (PubMedID)2-s2.0-85028711409 (Scopus ID)
    Conference
    IEEE VIS Conference
    Note

    Funding Agencies|Knut and Alice Wallenberg Foundation; Swedish e-Science Research Center (SeRC); ELLIIT; Vetenskapsradet [VR-2015-05462]; NASA [NNX16AB93A]; Moore-Sloan Data Science Environment at New York University; NSF [CNS-1229185, CCF-1533564, CNS-1544753, CNS-1730396]

    Available from: 2018-01-10 Created: 2018-01-10 Last updated: 2018-05-21Bibliographically approved
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    Tailoring visualization applications for tasks and users
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  • 172.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. New York University, USA.
    Axelsson, Emil
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Bladin, Karl
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Jonathas, Costa
    New York University, USA.
    Gene, Payne
    University of Utah, USA.
    Matthew, Territo
    University of Utah, USA.
    Kilby, Joakim
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Masha, Kuznetsova
    Community Coordinated Modeling Center, NASA, USA.
    Emmart, Carter
    American Museum of Natural History, USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    OpenSpace: An open-source astrovisualization framework2017In: Journal of Open Source Software, E-ISSN 2475-9066, Vol. 2, no 15, article id 281Article in journal (Refereed)
    Abstract [en]

    OpenSpace (2017; Bock et al. 2017)is an open source interactive data visualization software designed to visualize the entire known universe and portray our ongoing efforts to investigate the cosmos (Bladin, Karl and Axelsson, Emil and Broberg, Erik and Emmart, Carter and Ljung, Patric and Bock, Alexander and Ynnerman, Anders 2017; Bock, Pembroke, et al. 2015). Bringing the latest techniques from data visualization research to the general public and scientists (Bock, Marcinkowski, et al. 2015), OpenSpace supports interactive presentation of dynamic data from observations, simulations, and space mission planning and operations over a large span of sizes (Axelsson, Emil and Costa, Jonathas and Silva, Cláudio T. and Emmart, Carter and Bock, Alexander and Ynnerman, Anders 2017). The software supports multiple operating systems with an extensible architecture powering high resolution tiled displays, planetarium domes, as well as desktop computers. In addition, OpenSpace enables simultaneous connections across the globe creating opportunity for shared experiences among audiences worldwide.

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  • 173.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. University of Utah, USA.
    Axelsson, Emil
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Costa, Jonathas
    New York University, USA.
    Payne, Gene
    University of Utah, USA.
    Acinapura, Micah
    American Museum of Natural History, USA.
    Trakinski, Vivian
    American Museum of Natural History, USA.
    Emmart, Carter
    American Museum of Natural History, USA.
    Silva, Cláudio
    New York University, USA.
    Hansen, Charles
    University of Utah, USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV). University of Utah, USA.
    OpenSpace: A System for Astrographics2020In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 26, no 1, p. 633-642Article in journal (Refereed)
    Abstract [en]

    Human knowledge about the cosmos is rapidly increasing as instruments and simulations are generating new data supporting the formation of theory and understanding of the vastness and complexity of the universe. OpenSpace is a software system that takes on the mission of providing an integrated view of all these sources of data and supports interactive exploration of the known universe from the millimeter scale showing instruments on spacecrafts to billions of light years when visualizing the early universe. The ambition is to support research in astronomy and space exploration, science communication at museums and in planetariums as well as bringing exploratory astrographics to the class room. There is a multitude of challenges that need to be met in reaching this goal such as the data variety, multiple spatio-temporal scales, collaboration capabilities, etc. Furthermore, the system has to be flexible and modular to enable rapid prototyping and inclusion of new research results or space mission data and thereby shorten the time from discovery to dissemination. To support the different use cases the system has to be hardware agnostic and support a range of platforms and interaction paradigms. In this paper we describe how OpenSpace meets these challenges in an open source effort that is paving the path for the next generation of interactive astrographics.

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    OpenSpace: A System for Astrographics
  • 174.
    Bock, Alexander
    et al.
    NYU, USA.
    Axelsson, Emil
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Emmart, Carter
    Amer Museum Nat Hist, NY 10024 USA.
    Kuznetsova, Masha
    Community Coordinated Modeling Ctr, MD USA.
    Hansen, Charles
    Univ Utah, UT 84112 USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Univ Utah, UT 84112 USA.
    OpenSpace: Changing the Narrative of Public Dissemination in Astronomical Visualization from What to How2018In: IEEE Computer Graphics and Applications, ISSN 0272-1716, E-ISSN 1558-1756, Vol. 38, no 3, p. 44-57Article in journal (Refereed)
    Abstract [en]

    This article presents the development of open-source software called OpenSpace that bridges the gap between scientific discoveries and public dissemination and thus paves the way for the next generation of science communication and data exploration. The article describes how the platform enables interactive presentations of dynamic and time-varying processes by domain experts to the general public. The concepts are demonstrated through four cases: Image acquisitions of the New Horizons and Rosetta spacecraft, the dissemination of space weather phenomena, and the display of high-resolution planetary images. Each case has been presented at public events with great success. These cases highlight the details of data acquisition, rather than presenting the final results, showing the audience the value of supporting the efforts of the scientific discovery.

  • 175.
    Bock, Alexander
    et al.
    NYU, USA.
    Hansen, Charles
    Univ Utah, UT 84112 USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    OpenSpace: Bringing NASA Missions to the Public2018In: IEEE Computer Graphics and Applications, ISSN 0272-1716, E-ISSN 1558-1756, Vol. 38, no 5, p. 112-118Article in journal (Refereed)
    Abstract [en]

    This viewpoint presents OpenSpace, an open-source astrovisualization software project designed to bridge the gap between scientific discoveries and their public dissemination. A wealth of data exists for space missions from NASA and other sources. OpenSpace brings together this data and combines it in a range of immersive settings. Through non-linear storytelling and guided exploration, interactive immersive experiences help the public to engage with advanced space mission data and models, and thus be better informed and educated about NASA missions, the solar system and outer space. We demonstrate this capability by exploring the OSIRIS-Rex mission.

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  • 176.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Kleiner, A.
    IRobotPasadena, CA, United States.
    Lundberg, Jonas
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    An interactive visualization system for urban search & rescue mission planning2014In: 12th IEEE International Symposium on Safety, Security and Rescue Robotics, SSRR 2014 - Symposium Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2014, no 7017652Conference paper (Refereed)
    Abstract [en]

    We present a visualization system for incident commanders in urban search and rescue scenarios that supports the inspection and access path planning in post-disaster structures. Utilizing point cloud data acquired from unmanned robots, the system allows for assessment of automatically generated paths, whose computation is based on varying risk factors, in an interactive 3D environment increasing immersion. The incident commander interactively annotates and reevaluates the acquired point cloud based on live feedback. We describe design considerations, technical realization, and discuss the results of an expert evaluation that we conducted to assess our system.

  • 177.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Kleiner, Alexander
    Linköping University, Department of Computer and Information Science, Artificial Intelligence and Integrated Computer Systems. Linköping University, The Institute of Technology.
    Lundberg, Jonas
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Supporting Urban Search & Rescue Mission Planning through Visualization-Based Analysis2014In: Proceedings of the Vision, Modeling, and Visualization Conference 2014, Eurographics - European Association for Computer Graphics, 2014Conference paper (Refereed)
    Abstract [en]

    We propose a visualization system for incident commanders in urban search~\&~rescue scenarios that supports access path planning for post-disaster structures. Utilizing point cloud data acquired from unmanned robots, we provide methods for assessment of automatically generated paths. As data uncertainty and a priori unknown information make fully automated systems impractical, we present a set of viable access paths, based on varying risk factors, in a 3D environment combined with the visual analysis tools enabling informed decisions and trade-offs. Based on these decisions, a responder is guided along the path by the incident commander, who can interactively annotate and reevaluate the acquired point cloud to react to the dynamics of the situation. We describe design considerations for our system, technical realizations, and discuss the results of an expert evaluation.

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  • 178.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Lang, Norbert
    St. Barbara Hospital, Hamm, Germany.
    Evangelista, Gianpaolo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Lehrke, Ralph
    St. Barbara Hospital, Hamm, Germany.
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Guiding Deep Brain Stimulation Interventions by Fusing Multimodal Uncertainty Regions2013Conference paper (Other academic)
    Abstract [en]

    Deep Brain Stimulation (DBS) is a surgical intervention that is known to reduce or eliminate the symptoms of common movement disorders, such as Parkinson.s disease, dystonia, or tremor. During the intervention the surgeon places electrodes inside of the patient.s brain to stimulate speci.c regions. Since these regions span only a couple of millimeters, and electrode misplacement has severe consequences, reliable and accurate navigation is of great importance. Usually the surgeon relies on fused CT and MRI data sets, as well as direct feedback from the patient. More recently Microelectrode Recordings (MER), which support navigation by measuring the electric .eld of the patient.s brain, are also used. We propose a visualization system that fuses the different modalities: imaging data, MER and patient checks, as well as the related uncertainties, in an intuitive way to present placement-related information in a consistent view with the goal of supporting the surgeon in the .nal placement of the stimulating electrode. We will describe the design considerations for our system, the technical realization, present the outcome of the proposed system, and provide an evaluation.

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  • 179.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Lang, Norbert
    St. Barbara Hospital, Hamm, Germany.
    Evangelista, Gianpaolo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Lehrke, Ralph
    St. Barbara Hospital, Hamm, Germany.
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Supporting Deep Brain Stimulation Interventions by Fusing Microelectrode Recordings with Imaging Data2012Conference paper (Refereed)
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  • 180.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Marcinkowski, Michal
    Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering. American Museum of Natural History, New York, USA.
    Kilby, Joakim
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Emmart, Carter
    American Museum of Natural History, New York, USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    OpenSpace: Public Dissemination of Space Mission Profiles2015In: 2015 IEEE Scientific Visualization Conference (SciVis): Proceedings / [ed] James Ahrens; Huamin Qu; Jos Roerdink, Institute of Electrical and Electronics Engineers (IEEE), 2015, p. 141-142Conference paper (Refereed)
    Abstract [en]

    This work presents a visualization system and its application to space missions. The system allows the public to disseminate the scientific findings of space craft and gain a greater understanding thereof. Instruments field-of-views and their measurements are embedded in an accurate 3 dimensional rendering of the solar system to provide context to past measurements or the planning of future events. We tested our system with NASAs New Horizons at the Pluto Pallooza event in New York and will expose it to the greater public on the upcoming July 14th Pluto flyby.

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  • 181.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Mays, M. Leila
    NASA Goddard Space Flight Center, Greenbelt, MD, USA.
    Rastaetter, Lutz
    NASA Goddard Space Flight Center, Greenbelt, MD, USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    VCMass: A Framework for Verification of Coronal Mass Ejection Ensemble Simulations2014Conference paper (Refereed)
    Abstract [en]

    Supporting the growing field of space weather forecasting, we propose a framework to analyze ensemble simulations of coronal mass ejections. As the current simulation technique requires manual input, uncertainty is introduced into the simulation pipeline which leads to inaccurate predictions. Using our system, the analyst can compare ensemble members against ground truth data (arrival time and geo-effectivity) as well as information derived from satellite imagery. The simulations can be compared on a global basis, based on time-resolved quality measures, and as a 3D volumetric rendering with embedded satellite imagery in a multi-view setup. This flexible framework provides the expert with the tools to increase the knowledge about the, as of yet not fully understood, principles behind the formation of coronal mass ejections.

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  • 182.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Pembroke, Asher
    NASA Goddard Space Flight Center, USA.
    Mays, M. Leila
    NASA Goddard Space Flight Center, USA.
    Rastaetter, Lutz
    NASA Goddard Space Flight Center, USA.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    Ropinski, Timo
    Ulm University, Germany.
    Visual Verification of Space Weather Ensemble Simulations2015In: 2015 IEEE Scientific Visualization Conference (SciVis), IEEE, 2015, p. 17-24Conference paper (Refereed)
    Abstract [en]

    We propose a system to analyze and contextualize simulations of coronal mass ejections. As current simulation techniques require manual input, uncertainty is introduced into the simulation pipeline leading to inaccurate predictions that can be mitigated through ensemble simulations. We provide the space weather analyst with a multi-view system providing visualizations to: 1. compare ensemble members against ground truth measurements, 2. inspect time-dependent information derived from optical flow analysis of satellite images, and 3. combine satellite images with a volumetric rendering of the simulations. This three-tier workflow provides experts with tools to discover correlations between errors in predictions and simulation parameters, thus increasing knowledge about the evolution and propagation of coronal mass ejections that pose a danger to Earth and interplanetary travel

  • 183.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Pembroke, Asher
    NASA Goddard Space Flight Center, Greenbelt, MD, United States.
    Mays, M. Leila
    Catholic University of America, Washington, DC, United States.
    Ynnerman, Anders
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV).
    OpenSpace: An Open-Source Framework for Data Visualization and Contextualization2015Conference paper (Refereed)
    Abstract [en]

    We present an open-source software development effort called OpenSpace that is tailored for the dissemination of space-related data visualization. In the current stages of the project, we have focussed on the public dissemination of space missions (Rosetta and New Horizons) as well as the support of space weather forecasting. The presented work will focus on the latter of these foci and elaborate on the efforts that have gone into developing a system that allows the user to assess the accuracy and validity of ENLIL ensemble simulations. It becomes possible to compare the results of ENLIL CME simulations with STEREO and SOHO images using an optical flow algorithm. This allows the user to compare velocities in the volumetric rendering of ENLIL data with the movement of CMEs through the field-of-views of various instruments onboard the space craft. By allowing the user access to these comparisons, new information about the time evolution of CMEs through the interplanetary medium is possible. Additionally, contextualizing this information in three-dimensional rendering scene, allows the analyst and the public to disseminate this data. This dissemination is further improved by the ability to connect multiple instances of the software and, thus, reach a broader audience. In a second step, we plan to combine the two foci of the project to enable the visualization of the SWAP instrument onboard New Horizons in context with a far-reaching ENLIL simulation, thus providing additional information about the solar wind dynamics of the outer solar system. The initial work regarding this plan will be presented.

  • 184.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Sundén, Erik
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Liu, Bingchen
    University of Auckland, New Zealand .
    Wuensche, Burkhard
    University of Auckland, New Zealand .
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Coherency-Based Curve Compression for High-Order Finite Element Model Visualization2012In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 18, no 12, p. 2315-2324Article in journal (Refereed)
    Abstract [en]

    Finite element (FE) models are frequently used in engineering and life sciences within time-consuming simulations. In contrast with the regular grid structure facilitated by volumetric data sets, as used in medicine or geosciences, FE models are defined over a non-uniform grid. Elements can have curved faces and their interior can be defined through high-order basis functions, which pose additional challenges when visualizing these models. During ray-casting, the uniformly distributed sample points along each viewing ray must be transformed into the material space defined within each element. The computational complexity of this transformation makes a straightforward approach inadequate for interactive data exploration. In this paper, we introduce a novel coherency-based method which supports the interactive exploration of FE models by decoupling the expensive world-to-material space transformation from the rendering stage, thereby allowing it to be performed within a precomputation stage. Therefore, our approach computes view-independent proxy rays in material space, which are clustered to facilitate data reduction. During rendering, these proxy rays are accessed, and it becomes possible to visually analyze high-order FE models at interactive frame rates, even when they are time-varying or consist of multiple modalities. Within this paper, we provide the necessary background about the FE data, describe our decoupling method, and introduce our interactive rendering algorithm. Furthermore, we provide visual results and analyze the error introduced by the presented approach.

  • 185.
    Bock, Alexander
    et al.
    Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering.
    Svensson, Åsa
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Kleiner, Alexander
    iRobot, CA USA.
    Lundberg, Jonas
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Ropinski, Timo
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Ulm University, Germany.
    A Visualization-Based Analysis System for Urban Search & Rescue Mission Planning Support2017In: Computer graphics forum (Print), ISSN 0167-7055, E-ISSN 1467-8659, Vol. 36, no 6, p. 148-159Article in journal (Refereed)
    Abstract [en]

    We propose a visualization system for incident commanders (ICs) in urban searchandrescue scenarios that supports path planning in post-disaster structures. Utilizing point cloud data acquired from unmanned robots, we provide methods for the assessment of automatically generated paths. As data uncertainty and a priori unknown information make fully automated systems impractical, we present the IC with a set of viable access paths, based on varying risk factors, in a 3D environment combined with visual analysis tools enabling informed decision making and trade-offs. Based on these decisions, a responder is guided along the path by the IC, who can interactively annotate and reevaluate the acquired point cloud and generated paths to react to the dynamics of the situation. We describe visualization design considerations for our system and decision support systems in general, technical realizations of the visualization components, and discuss the results of two qualitative expert evaluation; one online study with nine searchandrescue experts and an eye-tracking study in which four experts used the system on an application case.

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  • 186.
    Bodin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Jaber, Momamed
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Energiberäkning för påbyggnader2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Saving energy is important both economically and environmentally.

    The way we in Sweden build our houses and the rules that govern our energy usage has varied over the years.

    Åtvidabergstakvåningar is a company that perform superstructures in the shape of new penthouses for villas. Åtvidabergstakvåningar came with the initiative for the study, too get a picture of how the energy usage transformed for villas equipped with their penthouses. They also came with the initiative for the method to create time distinct villas and equip these with their penthouses.

    The study gives a picture of how the building envelop is composed and how the energy loss is through it. The study will also compare how the rules that govern energy loss and usage have transformed over the years.

    The result of the Study is an energy calculation that declares the energy usage for the time distinct villas with and without penthouses.

    The Result of the study shows that the older houses get a better energy performance after adding on the penthouses, while the new house got a value that was similar.

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  • 187.
    Bodén, Anna
    et al.
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Neurobiology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Clinical pathology.
    Molin, Jesper
    Sectra AB, Linkoping, Sweden.
    Garvin, Stina
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Neurobiology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Clinical pathology.
    West, Rebecca A.
    Leeds Teaching Hosp NHS Trust, England; Dewsbury & Dist Hosp, England.
    Lundström, Claes
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV). Sectra AB, Linkoping, Sweden.
    Treanor, Darren
    Linköping University, Department of Biomedical and Clinical Sciences, Division of Inflammation and Infection. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Diagnostics, Clinical pathology. Leeds Teaching Hosp NHS Trust, England; Univ Leeds, England.
    The human-in-the-loop: an evaluation of pathologists interaction with artificial intelligence in clinical practice2021In: Histopathology, ISSN 0309-0167, E-ISSN 1365-2559, Vol. 79, no 2, p. 210-218Article in journal (Refereed)
    Abstract [en]

    Aims: One of the major drivers of the adoption of digital pathology in clinical practice is the possibility of introducing digital image analysis (DIA) to assist with diagnostic tasks. This offers potential increases in accuracy, reproducibility, and efficiency. Whereas stand-alone DIA has great potential benefit for research, little is known about the effect of DIA assistance in clinical use. The aim of this study was to investigate the clinical use characteristics of a DIA application for Ki67 proliferation assessment. Specifically, the human-in-the-loop interplay between DIA and pathologists was studied. Methods and results: We retrospectively investigated breast cancer Ki67 areas assessed with human-in-the-loop DIA and compared them with visual and automatic approaches. The results, expressed as standard deviation of the error in the Ki67 index, showed that visual estimation (eyeballing) (14.9 percentage points) performed significantly worse (P < 0.05) than DIA alone (7.2 percentage points) and DIA with human-in-the-loop corrections (6.9 percentage points). At the overall level, no improvement resulting from the addition of human-in-the-loop corrections to the automatic DIA results could be seen. For individual cases, however, human-in-the-loop corrections could address major DIA errors in terms of poor thresholding of faint staining and incorrect tumour-stroma separation. Conclusion: The findings indicate that the primary value of human-in-the-loop corrections is to address major weaknesses of a DIA application, rather than fine-tuning the DIA quantifications.

    Download full text (pdf)
    fulltext
  • 188.
    Bohlin, Alicia
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Hej, superhjälte! - informationsvisualisering för barn med diabetes typ 12019Independent thesis Basic level (university diploma), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis was to examine how an information visualisation about what happens in the human body of type 1 diabetics for children can look like.

    Initially, theory about information visualisation, principles of information design, image rethorics and different theories around what makes a good information image was studied. Following, four pre studies were conducted to support the reason for the main study to be conducted, develop criteria for how an information visualisation should and must be, examine in what context children are used to see pictures and to get confirmation on what metaphors and explanations are used to explain diabetes type 1.

    The results from the pre studies were brought into a design process as foundation for the further work. The design process began with brainstorming, sketching and a valuation of the produced concepts. The two concepts which performed best during the valuation were designed and brought into another valuation fase with the target group of this thesis where one of the design solutions performed better.

    The conclusion of this thesis is that an information visualisation about what happens in the human body of type 1 diabetics for children can be a joyful children's book, where the pages are designed with help of design principles for information design. The images on the pages should be large enough for the children to understand what is illustrated. 15cm x 15cm has proven to be a reasonable size for the pages.

    Download full text (pdf)
    Hej, superhjälte! - informationsvisualisering för barn med diabetes typ 1
  • 189.
    Bohlin, Gustav
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Arvstvisten: om hur DNA-molekylen blev accepterad som bärare av genetisk information i Sverige och om ett uteblivet Nobelpris2009 (ed. 1)Book (Other academic)
    Abstract [en]

    The first evidence of DNA as the carrier of genetic information was published in 1944 in a study led by Oswald T. Avery. This task had previously been attributed to proteins and the results were not immediately accepted. The transition to an acceptance of DNA as the carrier of genetic information has been likened to a paradigm shift which occurred about ten years later.

    This project is mainly based on interviews with Swedish scientists who were active in nucleic acid research from 1950 and onwards. The aim of the present study was to deepen and discuss the available knowledge concerning time and events of the paradigm shift in Sweden. Moreover, possible reasons for Avery not being awarded the Nobel Prize are discussed from different aspects. The results indicate that the debate on which molecule carries the genes mainly took place in USA. It was not as prominent in Sweden and the acceptance probably happened somewhat later there. That is likely to be explained by the organisation of the national nucleic acid research. Explanations as to why Avery was not awarded a Nobel Prize are discussed in the form of individuals, organisational factors as well as in overall structures.

  • 190.
    Bohlin, Gustav
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Evaluating Swedish newspapers’ communication on the scientific background to antibiotic resistance.2012Conference paper (Other academic)
  • 191. Order onlineBuy this publication >>
    Bohlin, Gustav
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Evolving germs – Antibiotic resistance and natural selection in education and public communication2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Bacterial resistance to antibiotics threatens modern healthcare on a global scale. Several actors in society, including the general public, must become more involved if this development is to be countered. The conveyance of relevant information provided through education and media reports is therefore of high concern. Antibiotic resistance evolves through the mechanisms of natural selection; in this way, a sound understanding of these mechanisms underlies explanations of causes and the development of effective risk-reduction measures. In addition to natural selection functioning as an explanatory framework to antibiotic resistance, bacterial resistance as a context seems to possess a number of qualities that make it suitable for teaching natural selection – a subject that has been proven notoriously hard to teach and learn. A recently suggested approach for learning natural selection involves so-called threshold concepts, which encompass abstract and integrative ideas. The threshold concepts associated with natural selection include, among others, the notions of randomness as well as vast spatial and temporal scales. Illustrating complex relationships between concepts on different levels of organization is one, of several, areas where visualizations are efficient. Given the often-imperceptible nature of threshold concepts as well as the fact that natural selection processes occur on different organizational levels, visual accounts of natural selection have many potential benefits for learning.

    Against this background, the present dissertation explores information conveyed to the public regarding antibiotic resistance and natural selection, as well as investigates how these topics are presented together, by scrutinizing media including news reports, websites, educational textbooks and online videos. The principal method employed in the media studies was content analysis, which was complemented with various other analytical procedures. Moreover, a classroom study was performed, in which novice pupils worked with a series of animations explaining the evolution of antibiotic resistance. Data from individual written assignments, group questions and video-recorded discussions were collected and analyzed to empirically explore the potential of antibiotic resistance as a context for learning about evolution through natural selection.

    Among the findings are that certain information, that is crucial for the public to know, about antibiotic resistance was conveyed to a low extent through wide-reaching news reporting. Moreover, explanations based on natural selection were rarely included in accounts of antibiotic resistance in any of the examined media. Thus, it is highly likely that a large proportion of the population is never exposed to explanations for resistance development during education or through newspapers. Furthermore, the few examples that were encountered in newspapers or textbooks were hardly ever visualized, but presented only in textual form. With regard to videos purporting to explain natural selection, it was found that a majority lacked accounts of central key concepts. Additionally, explanations of how variation originates on the DNA-level were especially scarce. These and other findings coming from the content analyses are discussed through the lens of scientific literacy and could be used to inform and strengthen teaching and scientific curricula with regards to both antibiotic resistance and evolution. Furthermore, several factors of interest for using antibiotic resistance in the teaching of evolution were identified from the classroom study. These involve, among others, how learners’ perception of threshold concepts such as randomness and levels of organization in space and time are affected by the bacterial context

     

    List of papers
    1. Is it my responsibility or theirs? Risk communication about antibiotic resistance in the Swedish daily press
    Open this publication in new window or tab >>Is it my responsibility or theirs? Risk communication about antibiotic resistance in the Swedish daily press
    2014 (English)In: Journal of Science Communication, E-ISSN 1824-2049, Vol. 13, no 3:A02Article in journal (Refereed) Published
    Abstract [en]

    Antibiotic resistance is an increasing global threat involving many actors, including the general public. We present findings from a content analysis of the coverage of antibiotic resistance in the Swedish print media with respect to the risk communication factors cause, magnitude and countermeasures. The most commonly reported cause of development and spread of resistance was unnecessary prescription of antibiotics. Risk magnitudes were mostly reported qualitatively rather than using quantitative figures. Risk-reduction measures were analyzed using a framework that distinguishes between personal and societal efficacy. Measures at the societal level were more commonly reported compared to the individual level.

    Place, publisher, year, edition, pages
    Trieste, Italy: Scuola Internazionale Superiore di Studi Avanzati (S I S S A), 2014
    Keywords
    Health communication, risk communication, science and media
    National Category
    Didactics Communication Studies
    Identifiers
    urn:nbn:se:liu:diva-107568 (URN)2-s2.0-84907409349 (Scopus ID)
    Projects
    EvoVis
    Funder
    Swedish Research Council, VR 2008-5077; 2012-5344
    Available from: 2014-06-16 Created: 2014-06-16 Last updated: 2023-10-03Bibliographically approved
    2. Evolutionary Explanations for Antibiotic Resistance in Daily Press, Online Websites and Biology Textbooks in Sweden
    Open this publication in new window or tab >>Evolutionary Explanations for Antibiotic Resistance in Daily Press, Online Websites and Biology Textbooks in Sweden
    2015 (English)In: International Journal of Science Education, Part B Communication and Public Engagement, ISSN 2154-8455, E-ISSN 2154-8463, Vol. 5, no 4, p. 319-338Article in journal (Refereed) Published
    Abstract [en]

    The present study explores the extent and precision of evolutionary explanations for antibiotic resistance in communication directed toward the Swedish public. Bacterial resistance develops through evolutionary mechanisms and knowledge of these helps to explain causes underlying the growing prevalence of resistant strains, as well as important countermeasures to address the problem. A content analysis based on key evolutionary concepts underpinning resistance development was conducted on three different data sources: print newspapers, online websites and biology textbooks. The results revealed that evolutionary mechanisms are seldom included in accounts of antibiotic resistance provided by these sources. One of the included textbooks (n = 6) but none of the newspaper articles (n = 221) or websites (n = 19) covered all six concepts considered in the analysis. A cluster of four concepts regarded as most important for understanding the evolution of resistance development was only included in one news article, one textbook and two websites. Moreover, explanations were seldom supported visually and only two accompanying illustrations were found during the analysis. The results indicated that a large proportion of the Swedish public might never encounter an explanation of antibiotic resistance in evolutionary terms. This could be problematic since increased public awareness and understanding is crucial to counter the issue of bacterial resistance. 

    Place, publisher, year, edition, pages
    Routledge, 2015
    Keywords
    Antibiotic resistance, Evolution, Textbook analysis, Content analysis, News media
    National Category
    Didactics
    Identifiers
    urn:nbn:se:liu:diva-111959 (URN)10.1080/21548455.2014.978411 (DOI)
    Projects
    EvoVis
    Funder
    Swedish Research Council, 2012-5344
    Available from: 2014-11-11 Created: 2014-11-11 Last updated: 2017-12-05Bibliographically approved
    3. A conceptual characterization of online videos explaining natural selection
    Open this publication in new window or tab >>A conceptual characterization of online videos explaining natural selection
    2017 (English)In: Science & Education, ISSN 0926-7220, E-ISSN 1573-1901, Vol. 26, no 7-9, p. 975-999Article in journal (Refereed) Published
    Abstract [en]

    Educational videos on the Internet comprise a vast and highly diverse source of information. Online search engines facilitate access to numerous videos claiming to explain natural selection, but little is known about the degree to which the video content match key evolutionary content identified as important in evolution education research. In this study, we therefore analyzed the content of 60 videos accessed through the Internet, using a criteria catalog with 38 operationalized variables derived from research literature. The variables were sorted into four categories: (a) key concepts (e.g. limited resources and inherited variation), (b) threshold concepts (abstract concepts with a transforming and integrative function), (c) misconceptions (e.g. that evolution is driven by need), and (d) organismal context (e.g. animal or plant). The results indicate that some concepts are frequently communicated, and certain taxa are commonly used to illustrate concepts, while others are seldom included. In addition, evolutionary phenomena at small temporal and spatial scales, such as subcellular processes, are rarely covered. Rather, the focus is on population-level events over time scales spanning years or longer. This is consistent with an observed lack of explanations regarding how randomly occurring mutations provide the basis for variation (and thus natural selection). The findings imply, among other things, that some components of natural selection warrant far more attention in biology teaching and science education research.

    Place, publisher, year, edition, pages
    Springer Netherlands, 2017
    Keywords
    natural selection, evolution, threshold concepts, visualizations, misconceptions, content analysis, videos, key concepts
    National Category
    Didactics
    Identifiers
    urn:nbn:se:liu:diva-143411 (URN)10.1007/s11191-017-9938-7 (DOI)000418390100011 ()
    Projects
    EvoVis
    Funder
    Swedish Research Council, 2012-5344
    Available from: 2017-12-05 Created: 2017-12-05 Last updated: 2021-02-18Bibliographically approved
    4. Insights from introducing natural selection to novices using animations of antibiotic resistance
    Open this publication in new window or tab >>Insights from introducing natural selection to novices using animations of antibiotic resistance
    2018 (English)In: Journal of Biological Education, ISSN 0021-9266, E-ISSN 2157-6009, Vol. 52, no 3, p. 314-330Article in journal (Refereed) Published
    Abstract [en]

    Antibiotic resistance is typically used to justify education about evolution, as evolutionary reasoning improves our understanding of causes of resistance and possible countermeasures. It has also been promoted as a useful context for teaching natural selection, because its potency as a selection factor, in combination with the very short generation times of bacteria, allows observation of rapid selection. It is also amenable to animations, which have potential for promoting conceptual inferences. Thus, we have explored the potential benefits of introducing antibiotic resistance as a first example of natural selection, in animations, to novice pupils (aged 13–14 years). We created a series of animations that pupils interacted with in groups of 3–5 (total n = 32). Data were collected at individual (pre-/post- test) and group (collaborative group questions) levels. In addition, the exercise was video-recorded and the full transcripts were analysed inductively. The results show that most of the pupils successfully applied basic evolutionary reasoning to predict antibiotic resistance development in tasks during and after the exercise, suggesting that this may be an effective approach. Pedagogical contributions include the identification of certain characteristics of the bacterial context for evolution teaching, including common misunderstandings, and factors to consider when designing animations.

    Place, publisher, year, edition, pages
    Taylor & Francis, 2018
    Keywords
    natural selection, antibiotic resistance, animation, mutations, lower secondary education
    National Category
    Didactics
    Identifiers
    urn:nbn:se:liu:diva-140024 (URN)10.1080/00219266.2017.1368687 (DOI)000438131600009 ()2-s2.0-85028536269 (Scopus ID)
    Projects
    EvoVis
    Funder
    Swedish Research Council, 2012-5344
    Note

    Funding agencies: Swedish Research Council (Vetenskapsradet) [2012-5344]

    Available from: 2017-08-28 Created: 2017-08-28 Last updated: 2021-02-18Bibliographically approved
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    Evolving germs – Antibiotic resistance and natural selection in education and public communication
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  • 192.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Göransson, Andreas C.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Gericke, Niklas
    Karlstad University, Department of Biology.
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    NTA-Digital – Tema Kroppen2016Conference paper (Other academic)
    Abstract [sv]

    Tema Kroppen är ett nytt digitalt tema inom NTA (Naturvetenskap och Teknik för Alla) som erbjuds årskurs 4-7 i alla anslutna skolor och kommuner. Det sjösätts tillsammans med ett nyproducerat tema om rymden under 2016 efter ett utvecklingsarbete som pågått sedan 2013. Sedan temat öppnade i slutet av våren har drygt 8 000 konton skapats. Projektledningen gav ”Visuellt lärande och kommunikation” (vid LiU och Norrköpings Visualiseringscenter) i uppdrag att, under ledning av Lena Tibell och Marie Rådbo, utforma en web-plattform samt innehåll och struktur för de två temana. Projektet har möjliggjorts genom ekonomiskt stöd från Marcus och Amalia Wallenbergs minnesfond.

    I tema Kroppen arbetar eleverna sig framåt i en historia genom att lösa uppgifter kopplade till ett antal av kroppens fysiologiska system (cirkulations-systemet, andning, matspjälkning, hormoner och nervsystemet). Till sin hjälp har de en interaktiv tredimensionell modell av människokroppen med integrerat faktamaterial och ett flertal simulatorer. För att lösa uppdragen krävs en kombination av arbete inne i portalen och fysiska laborationer som de utför i klassrummet. Utöver detta finns en inbyggd digital infrastruktur inom vilken eleverna lämnar in svar på uppgifter och kan kommunicera med sin lärare.

    Utvecklingsarbetet har utgått från tanken att kroppens system inte är isolerade från varandra utan står i ständig samverkan och påverkan. Ett flertal didaktiska hänsyn och frågeställningar har präglat arbetet; däribland lärande med modeller och representationer, att röra sig mellan olika skalnivåer, begreppssvårigheter och skildring av dynamiska förlopp.

    Vi kommer både visa upp exempel på hur temat och modellerna fungerar samt diskutera lärdomar och svårigheter som uppstått i utvecklingsarbetet. 

  • 193.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Göransson, Andreas C.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Höst, Gunnar E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Evolving germs – Introducing novice pupils to the evolution of bacterial resistance to antibiotics2017Conference paper (Other academic)
    Abstract [en]

    There is a dual relationship between antibiotic resistance and biological evolution. Antibiotic resistance is typically used as a motivation for why we need an efficient evolution education given that evolutionary reasoning improves our understanding of causes and suggested countermeasures. On the other hand, antibiotic resistance has also been suggested as a useful context in which evolution can be taught, based primarily but not solely on the quick generation times of bacteria. In the present study, we explore the potential benefits with using antibiotic resistance as an example when introducing evolution to novice pupils (aged 13-14). We created a series of animations that pupils interacted with in groups of 3-5 (total n=32). Data was collected on both individual (pre-posttest) and group (collaborative group questions) level. In addition, the exercise was video-taped and the full transcripts were analyzed inductively. The results show that a majority of the pupils succeeded in applying basic evolutionary reasoning to make predictions on antibiotic resistance during and after the exercise, suggesting that this may be a successful approach. Cautions to be aware of include pupils’ use of teleological and antropomorphic reasoning, especially in discussions on submicroscopical phenomena such as genetic processes. Implications for teaching include both lessons from the design of animations as well as the identification of common misunderstandings. The analysis also identifies and points toward several possible future research endeavours.

  • 194.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Göransson, Andreas C.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Höst, Gunnar
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Tibell, Lena
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    A conceptual characterization of online videos explaining natural selection2017In: Science & Education, ISSN 0926-7220, E-ISSN 1573-1901, Vol. 26, no 7-9, p. 975-999Article in journal (Refereed)
    Abstract [en]

    Educational videos on the Internet comprise a vast and highly diverse source of information. Online search engines facilitate access to numerous videos claiming to explain natural selection, but little is known about the degree to which the video content match key evolutionary content identified as important in evolution education research. In this study, we therefore analyzed the content of 60 videos accessed through the Internet, using a criteria catalog with 38 operationalized variables derived from research literature. The variables were sorted into four categories: (a) key concepts (e.g. limited resources and inherited variation), (b) threshold concepts (abstract concepts with a transforming and integrative function), (c) misconceptions (e.g. that evolution is driven by need), and (d) organismal context (e.g. animal or plant). The results indicate that some concepts are frequently communicated, and certain taxa are commonly used to illustrate concepts, while others are seldom included. In addition, evolutionary phenomena at small temporal and spatial scales, such as subcellular processes, are rarely covered. Rather, the focus is on population-level events over time scales spanning years or longer. This is consistent with an observed lack of explanations regarding how randomly occurring mutations provide the basis for variation (and thus natural selection). The findings imply, among other things, that some components of natural selection warrant far more attention in biology teaching and science education research.

    Download full text (pdf)
    fulltext
  • 195.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Göransson, Andreas C.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Höst, Gunnar
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Tibell, Lena
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Insights from introducing natural selection to novices using animations of antibiotic resistance2018In: Journal of Biological Education, ISSN 0021-9266, E-ISSN 2157-6009, Vol. 52, no 3, p. 314-330Article in journal (Refereed)
    Abstract [en]

    Antibiotic resistance is typically used to justify education about evolution, as evolutionary reasoning improves our understanding of causes of resistance and possible countermeasures. It has also been promoted as a useful context for teaching natural selection, because its potency as a selection factor, in combination with the very short generation times of bacteria, allows observation of rapid selection. It is also amenable to animations, which have potential for promoting conceptual inferences. Thus, we have explored the potential benefits of introducing antibiotic resistance as a first example of natural selection, in animations, to novice pupils (aged 13–14 years). We created a series of animations that pupils interacted with in groups of 3–5 (total n = 32). Data were collected at individual (pre-/post- test) and group (collaborative group questions) levels. In addition, the exercise was video-recorded and the full transcripts were analysed inductively. The results show that most of the pupils successfully applied basic evolutionary reasoning to predict antibiotic resistance development in tasks during and after the exercise, suggesting that this may be an effective approach. Pedagogical contributions include the identification of certain characteristics of the bacterial context for evolution teaching, including common misunderstandings, and factors to consider when designing animations.

    Download full text (pdf)
    fulltext
  • 196.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Göransson, Andreas C.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Diverse use of threshold concepts - A content analysis of online dynamic visualizations describing evolution.2015Conference paper (Refereed)
    Abstract [en]

    There is an abundance of dynamic visualizations (animations, videos and simulations) that claim to explain evolution available on the Internet. The present study explores what aspects of evolution that are represented in these potential learning tools. A criteria catalogue covering 40 operationalized variables was used as a content analysis grid in the analysis of 71 dynamic visualizations. The concepts, derived from research literature, were operationalized into variables sorted into four different categories: (a) content-specific concepts (such as limited resources or inherited variation), (b) threshold concepts (core concepts that transform and integrate understanding within a subject), (c) alternative conceptions (such as teleological explanations or anthropomorphism), and (d) model organism. The results indicate that some concepts are dominantly communicated while others are seldom or never included in online visualizations. Regarding the proposed threshold concepts, evolutionary events happening on small time- and spatial scales, such as subcellular processes, were seldom observed. Rather, the focus was on events happening at a population level in time scales spanning from years and longer. This echoes with an observed lack of explanations regarding randomly occurring mutations providing the basis for variation. Implications include that there are components of evolution that would benefit from being addressed with an increased focus in biology teaching and science education research. The results may also serve as a useful toolkit in the design of new educational material.

  • 197.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Göransson, Andreas C.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Evolution on the set – A conceptual characterization of online dynamic visualizations.2014Conference paper (Refereed)
    Abstract [en]

    Despite its recognized importance, the theory of evolution presents severe problems to learners. A common approach in science education research involves the division of evolution in conceptual constructs, lately also including the role of threshold concepts. These are seminal ideas that open up new ways of thinking about and interpreting previously known processes. For understanding of evolution, threshold concepts consist of, for example, randomness, probability and wide-stretched spatio-temporal scales. An abundance of dynamic visualizations (animations, videos and simulations), attempting to explain evolution, are available on the Internet. The aim with our study was to map what aspects of evolution that are represented in these visualizations. A criteria catalogue covering 42 operationalized variables was used as a content analysis grid in the analysis of a sample selection including 71 dynamic visualizations. The variables include evolution content concepts (such as limited resources and differential survival) and proposed threshold concepts (such as explicit mentioning of factors influenced by randomness or level of organization in space and time, including connections between submicro- and macro aspects). Furthermore, it includes common alternative conceptions (such as anthropomorphism or that evolution is driven by need). Two raters conducted the analysis with an overlapping reliability sample covering 23 visualizations. Intercoder reliability was calculated using Krippendorff’s alpha. The results indicate that some concepts are dominantly communicated while others are seldom or never included in online visualizations. Regarding the proposed threshold concepts, evolutionary events happening on small time- and spatial scales, such as subcellular processes, were seldom observed. Rather, the focus was on events happening at a population level in time scales spanning from years and longer. Implications include that there are components of evolution that would benefit from being addressed more explicit. The results may also serve as a useful toolkit in the design of new educational material.

  • 198.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Härting, Jennifer
    IPN- Leibniz-Institut für die Pädagogik der Naturwissenschaften und Mathematik.
    Harms, Ute
    IPN- Leibniz-Institut für die Pädagogik der Naturwissenschaften und Mathematik.
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    A Criteria Catalogue Covering Multiple Evolutionary Aspects Including Threshold Concepts for Assessment of Animations Explaining Evolution2015Conference paper (Refereed)
  • 199.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Höst, Gunnar E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Evolutionary Explanations for Antibiotic Resistance in Daily Press, Online Websites and Biology Textbooks in Sweden2015In: International Journal of Science Education, Part B Communication and Public Engagement, ISSN 2154-8455, E-ISSN 2154-8463, Vol. 5, no 4, p. 319-338Article in journal (Refereed)
    Abstract [en]

    The present study explores the extent and precision of evolutionary explanations for antibiotic resistance in communication directed toward the Swedish public. Bacterial resistance develops through evolutionary mechanisms and knowledge of these helps to explain causes underlying the growing prevalence of resistant strains, as well as important countermeasures to address the problem. A content analysis based on key evolutionary concepts underpinning resistance development was conducted on three different data sources: print newspapers, online websites and biology textbooks. The results revealed that evolutionary mechanisms are seldom included in accounts of antibiotic resistance provided by these sources. One of the included textbooks (n = 6) but none of the newspaper articles (n = 221) or websites (n = 19) covered all six concepts considered in the analysis. A cluster of four concepts regarded as most important for understanding the evolution of resistance development was only included in one news article, one textbook and two websites. Moreover, explanations were seldom supported visually and only two accompanying illustrations were found during the analysis. The results indicated that a large proportion of the Swedish public might never encounter an explanation of antibiotic resistance in evolutionary terms. This could be problematic since increased public awareness and understanding is crucial to counter the issue of bacterial resistance. 

  • 200.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Höst, Gunnar E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Is it my responsibility or theirs? Risk communication about antibiotic resistance in the Swedish daily press2014In: Journal of Science Communication, E-ISSN 1824-2049, Vol. 13, no 3:A02Article in journal (Refereed)
    Abstract [en]

    Antibiotic resistance is an increasing global threat involving many actors, including the general public. We present findings from a content analysis of the coverage of antibiotic resistance in the Swedish print media with respect to the risk communication factors cause, magnitude and countermeasures. The most commonly reported cause of development and spread of resistance was unnecessary prescription of antibiotics. Risk magnitudes were mostly reported qualitatively rather than using quantitative figures. Risk-reduction measures were analyzed using a framework that distinguishes between personal and societal efficacy. Measures at the societal level were more commonly reported compared to the individual level.

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