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Sökning: WFRF:(Persson Anders) > Engelska > Konferensbidrag

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31.
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  • Bivall Persson, Petter, 1979-, et al. (författare)
  • Designing and Evaluating a Haptic System for Biomolecular Education
  • 2007
  • Ingår i: IEEE Virtual Reality Conference, 2007. VR '07.. - Piscataway, NJ, USA : IEEE. - 1424409063 ; , s. 171-178
  • Konferensbidrag (refereegranskat)abstract
    • 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.
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33.
  • Bivall Persson, Petter, 1979-, et al. (författare)
  • Evaluating the Effectiveness of Haptic Visualization in Biomolecular Education - Feeling Molecular Specificity in a Docking Task
  • 2006
  • Ingår i: 12th IOSTE Symposium. - : Universiti Science Malaysia. - 9832700396 ; , s. 745-752
  • Konferensbidrag (refereegranskat)abstract
    • 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.
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34.
  • Bivall Persson, Petter, 1979-, et al. (författare)
  • Improved Feature Detection over Large Force Ranges Using History Dependent Transfer Functions
  • 2009
  • Ingår i: Third Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environments and Teleoperator Systems, WorldHaptics 2009. - : IEEE. - 9781424438587 ; , s. 476-481
  • Konferensbidrag (refereegranskat)abstract
    • 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.
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40.
  • Butler, Simon, et al. (författare)
  • An Exploration of Openness in Hardware and Software Through Implementation of a RISC-V Based Desktop Computer
  • 2022
  • Ingår i: OpenSym '22. - New York, NY, USA : Association for Computing Machinery (ACM). - 9781450398459 - 9781450398466
  • Konferensbidrag (refereegranskat)abstract
    • Open hardware and open source software platforms bring benefits to both implementers and users in the form of system adaptability and maintainability, and through the avoidance of lock-in, for example. Development of the \riscv\ Instruction Set Architecture and processors during the last ten years has made the implementation of a desktop computer using open hardware, including open processors, and open source software an approaching possibility. We use the SiFive Unmatched development board and Ubuntu Linux, and the recorded experiences of system builders using the Unmatched board to explore the extent to which it is possible to create an open desktop computer. The work identifies current limitations to implementing an open computer system, which lie mainly at the interface between the operating system and hardware components. Potential solutions to the challenges uncovered are proposed, including greater consideration of openness during the early stages of product design. A further contribution is made by an account of the synergies arising from open collaboration in a private-collective innovation process.
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