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  • 1.
    Borglund, Erik AM
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Recordkeeping in Temporary Command Settings2011In: iPRES 2011 8th International Conference on Preservation of Digital Objects / [ed] José Borbinha, Adam Jatowt, Schubert Foo, Shigeo Sugimoto, Christopher Khoo, Raju Buddharaju, 2011, p. 205-209Conference paper (Refereed)
    Abstract [en]

    This article is about the recordkeeping that takes place during large police operations in different command post settings, and presents the tentative results from a three-year study. The aim is to increase knowledge of the problems related to recordkeeping in this kind of environment. Two police operations have been used as data sources, one large EU ministerial meeting in Sweden, and one regional disaster training exercise. An interpretative case study approach has been applied where observation and interviews were the primary data collection techniques. One problem is that too much important information is recorded in less permanent ways, on whiteboards and on flip charts. Capture, storage, and dissemination of those temporal and analogue records are difficult, and reduce the possibility to use records from large operations as knowledge reservoirs. 

  • 2.
    Borglund, Erik AM
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Öberg, Lena-Maria
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Persson-Slumpi, Thomas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Hybrids acting at the hybrid arena2011In: Proceedings of IRIS 2011 / [ed] Timo Leino, Åbo: University of Turku & ̊bo Akademi University , 2011, p. 56-67Conference paper (Refereed)
    Abstract [en]

    IT has for a long time been viewed as a success factor for police investigation, but now IT has also become an obstacle. Many modern crimes are of a nature where the evidence needed for police investigations is found in both the analogue world and the digital world. We argue that modern criminals act as hybrids, i.e. they are using IT as natural components in their criminal activities. In this paper we analyze the modern criminal as a hybrid and analyze the effect this perspective has on modern police work. The result is that the crime arena should be seen as a hybrid arena, where the criminals and the police both should take the roles as hybrids. Today, there is a division among the police officers, some are acting in the digital world; others in the analogue world. This gives the criminal a bit of an advantage. 

  • 3.
    Brunnström, Kjell
    et al.
    Acreo AB, Kista, Sweden.
    Sedano, Iñigo
    Tecnalia Research & Innovation, Bilbao, Spain.
    Wang, Kun
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Barkowsky, Markus
    IRCCyN, Nantes; France.
    Kihl, Maria
    Lund University.
    Andrén, Börje
    Acreo AB, Kista, Sweden.
    Le Callet, Patrick
    IRCCyN, Nantes; France.
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Aurelius, Andreas
    Acreo AB, Kista, Sweden.
    2D no-reference video quality model development and 3D video transmission quality2012In: Proceedings of the Sixth International Workshop on Video Processing and Quality Metrics for Consumer Electronics VPQM-2012, 2012Conference paper (Other academic)
    Abstract [en]

    This presentation will target two different topics in video quality assessment. First, we discuss 2D no-reference video quality model development. Further, we discuss how to find suitable quality for 3D video transmission. No-reference metrics are the only practical option for monitoring of 2D video quality in live networks. In order to decrease the development time, it might be possible to use full-reference metrics for this purpose. In this work, we have evaluated six full-reference objective metrics in three different databases. We show statistically that VQM performs the best. Further, we use these results to develop a lightweight no-reference model. We have also investigated users' experience of stereoscopic 3D video quality by performing the rating of two subjective assessment datasets, targeting in one dataset efficient transmission in the transmission error free case and error concealment in the other. Among other results, it was shown that, based on the same level of quality of experience, spatial down-sampling may lead to better bitrate efficiency while temporal down-sampling will be worse. When network impairments occur, traditional error 2D concealment methods need to be reinvestigated as they were outperformed switching to 2D presentation.

  • 4.
    Brunnström, Kjell
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology. Acreo Swedish ICT AB.
    Wang, Kun
    Acreo Swedish ICT AB.
    Tavakoli, Samira
    Universidad Politécnica de Madrid, Spain.
    Andrén, Börje
    Acreo Swedish ICT AB.
    Symptoms analysis of 3D TV viewing based on Simulator Sickness Questionnaires2017In: Quality and User Experience, ISSN 2366-0147, Vol. 2, no 1Article in journal (Refereed)
    Abstract [en]

    Stereoscopic 3D TV viewing puts different visual demands on the viewer compared to 2D TV viewing. Previous research has reported on viewers' fatigue and discomfort and other negative effects. This study is to investigate further how severe and what symptoms may arise from somewhat longish 3D TV viewing.

    The MPEG 3DV project is working on the next-generation video encoding standard and in this process, MPEG issued a call for proposal of encoding algorithms. To evaluate these algorithms a large scale subjective test was performed involving Laboratories all over the world[1, 2]. For the participating Labs, it was optional to administer a slightly modified Simulator Sickness Questionnaire (SSQ) before and after the test. One of the SSQ data sets described in this article is coming from this study. The SSQ data from the MPEG test is the largest data set in this study and also contains the longest viewing times. Along with the SSQ data from the MPEG test, we have also collected questionnaire data in three other 3D TV studies. We did two on the same 3D TV (passive film pattern retarder) as in the MPEG test, and one was using a projector system. As comparison SSQ data from a 2D video quality experiment is also presented. 

    This investigation shows a statistically significant increase in symptoms after viewing 3D TV primarily related to the visual or Oculomotor system. Surprisingly, 3D video viewing using projectors did not show this effect.

  • 5.
    Dima, Elijs
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Determining UI design principles for Google Glass and other over-eye interactive device applications2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Google Glass is a new personal computing device that employs an over-eyetransparent display together with voice-control in order to offer audiovisual informationto the device's users. Glass is also a new mediated-reality platform,fundamentally different from common computers and smartphones, and theavailable Glass application (Glassware) design guides do not fully cover human-computer interaction issues that are imposed by Glass' characteristics – issuessuch as optimum information density, use of colourization and positioningto separate information, optimum amount of discrete entities on display, and theuse of iconography. By combining existing guidelines for Glassware UI designwith past research on human-computer interaction and psychology, those issuescan be addressed and can lead to additional design principles. To evaluate theefficacy of such combinations within the technical and design limitations imposedby Google Glass, a set of UI mock-ups for fictional Glassware is createdand used in multiple surveys to acquire data on human response to those combinedfactors. During the study, it was determined that factors including colourization,element positioning and use of icons have a definite effect on user perceptionand preferences, whilst factors related to information density andamount of discrete entities on screen are less relevant. Additionally, supportingevidence was found in relation to the assumption that utility is more importantthan functionless aesthetics. As a result, a UI design guideline set was formulatedthat can be used to supplement existing UI design guidelines for GoogleGlass and similar over-eye transparent-screen devices.

  • 6.
    Fagerholm, Anna-Sara
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Andersson, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Information Visualization and Design2018In: VINCI '18 Proceedings of the 11th International Symposium on Visual Information Communication and Interaction / [ed] Karsten Klein, Yi-Na Li, and Andreas Kerren, New York: ACM Publications, 2018, p. 112-113Conference paper (Refereed)
    Abstract [en]

    Recently, there has been an increase of data visualizations and in the diversity of forms. In parallel, design research has developed over the last decades. However, there have been few academic publications in the area of design specifically focusing on visualization research. In this poster, we present an overview of design research within the field of visualization in order to investigate key research areas and possible directions for future work.

  • 7.
    Magnusson, M.
    et al.
    Interactive Institute, Karlstad University, Sweden .
    Öberg, Lena-Marie
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and System science.
    Crisis training software and user needs - Research directions2015In: ISCRAM 2015 Conference Proceedings - 12th International Conference on Information Systems for Crisis Response and Management, ISCRAM, 2015Conference paper (Refereed)
    Abstract [en]

    Crisis management training software is gaining researchers' as well as practitioners' interest. In order to truly support organizations it is important that such software responds to actual user needs. The aim of this study is to compare existing initiative described in research with the needs of the users and to identify possible research directions for forthcoming studies. The literature review shows that discussions on users' needs are superficial at best. The software described in research mainly focus on co-located execution of exercises, often in the form of simulations. Furthermore, a "right or wrong" behavior is usually built-in. Empirical data from a web survey indicate that flexibility in time and space during training is a fundamental user need. This is not particularly acknowledged in earlier research. Neither is the users' wish for better support in designing exercises. We propose that system flexibility, modularity and pedagogy for computer based crisis training are urgent issues for future research.

  • 8.
    Wang, Junle
    et al.
    Université de Nantes, France.
    Le Callet, Patrick
    Université de Nantes, France.
    Ricordel, Vincent
    Université de Nantes, France.
    Tourancheau, Sylvain
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Quantifying depth bias in free viewing of still stereoscopic synthetic stimuli2011In: Abstracts of the 16th European Conference on Eye Movements: Journal of Eye Movement Research, 4(3)., 2011, p. 92-Conference paper (Refereed)
    Abstract [en]

    In studies of 2D visual attention, eye-tracking data show a so-called “center-bias”, which means that fixationsare biased towards the center of 2D still images. However, in stereoscopic visual attention, depth is anotherfeature having great influence on guiding eye movements. Relatively little is known about the impact of depth.Several studies mentioned that people tend to look at the objects at certain depth planes. Therefore, it isreasonable to suppose the existence of a “depth-bias”. But studies proving or quantifying this depth-bias arestill limited. We conducted a binocular eye-tracking experiment by showing synthetic stimuli on a stereoscopicdisplay. Observers were required to do a free-viewing task through active shutter glasses. Gaze positions ofboth eyes were recorded for obtaining the depth of fixation. Stimuli were well designed in order to let thecenter-bias and depth-bias affect eye movements individually. Results showed that the number of fixationsvaried as a function of depth planes. There was also a relationship between the duration of fixation and thedepth plane where the objects were located.

  • 9.
    Wang, Junle
    et al.
    Université de Nantes, France.
    Le Callet, Patrick
    Université de Nantes, France.
    Ricordel, Vincent
    Université de Nantes, France.
    Tourancheau, Sylvain
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Quantifying depth bias in free viewing of still stereoscopic synthetic stimuli2011In: Abstracts of the 16th European Conference on Eye Movements, Marseille, 21 - 25 August 2011. Journal of Eye Movement Research, 4(3)., 2011Conference paper (Refereed)
    Abstract [en]

    In studies of 2D visual attention, eye-tracking data show a so-called “center-bias”, which means that fixations are biased towards the center of 2D still images. However, in stereoscopic visual attention, depth is another feature having great influence on guiding eye movements. Relatively little is known about the impact of depth. Several studies mentioned that people tend to look at the objects at certain depth planes. Therefore, it is reasonable to suppose the existence of a “depth-bias”. But studies proving or quantifying this depth-bias are still limited. We conducted a binocular eye-tracking experiment by showing synthetic stimuli on a stereoscopic display. Observers were required to do a free-viewing task through active shutter glasses. Gaze positions of both eyes were recorded for obtaining the depth of fixation. Stimuli were well designed in order to let the center-bias and depth-bias affect eye movements individually. Results showed that the number of fixations varied as a function of depth planes. There was also a relationship between the duration of fixation and the depth plane where the objects were located.

  • 10.
    Wang, Kun
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems. Dept. of NetLab: Visual Media Quality, Swedish ICT-Acreo AB, Sweden .
    Brunnström, Kjell
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems. Dept. of NetLab: Visual Media Quality, Swedish ICT-Acreo AB, Sweden .
    Barkowsky, M.
    Dept. of Image and Video Communication, IRCCyN, University of Nantes, France .
    Urvoy, M.
    Dept. of Image and Video Communication, IRCCyN, University of Nantes, France .
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Le Callet, P.
    Dept. of Image and Video Communication, IRCCyN, University of Nantes, France .
    Tourancheau, Sylvain
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Andren, B.
    Dept. of NetLab: Visual Media Quality, Swedish ICT-Acreo AB, Sweden .
    Stereoscopic 3D video coding quality evaluation with 2D objective metrics2013In: Proceedings of SPIE - The International Society for Optical Engineering, 2013, p. Art. no. 86481L-Conference paper (Refereed)
    Abstract [en]

    The 3D video quality is of highest importance for the adoption of a new technology from a user's point of view. In this paper we evaluated the impact of coding artefacts on stereoscopic 3D video quality by making use of several existing full reference 2D objective metrics. We analyzed the performance of objective metrics by comparing to the results of subjective experiment. The results show that pixel based Visual Information Fidelity metrics fits subjective data the best. The 2D stereoscopic video quality seems to have dominant impact on the coding artefacts impaired stereoscopic videos.

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