| 11. |
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| 12. |
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| 13. |
- Backlund, Per, et al.
(författare)
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Pre-hospital training and simulation initiative
- 2014
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Konferensbidrag (refereegranskat)abstract
- Background The pre-hospital process is a complex one involving aspects such as medical skills as well as care taking, team performance, inter-organizational cooperation and communication. This calls for novel training methods and technology support. Our review of literature (covering the areas of pre-hospital care, training simulator technologies and methods and process modelling) indicates that the different aspects are typically trained in isolation, e.g. medical skills using patient simulators.Objective The pre-hospital training center project addresses the overall complexity of the pre-hospital process by taking all of the aspects into account when designing scenarios and technology support for training the complete prehospital process (covering alarm, on-scene activities, transportation and hand-over). This is indeed a challenging task as we need to develop both training methods and technology support for a very complex training situation.Methods The project will develop a prototype scenario along with technology support to enact it. The training scenario will involve many of the aspects listed above and will be tested in a field experiment with ambulance personnel. Results The expected outcome of the project is a platform for establishing a pre-hospital simulation and training center. The initial technologies, research results and experiences will be used to form a consortium for further work and development. Conclusions We have identified a need for a pre-hospital training center with the unique and ambitious idea of covering the entire pre-hospital process as well as its many interacting aspects. To the best of our knowledge this approach is not at all common and we expect the complexity to be so high that it is a challenging enough research area that can only be addressed if we have a well-designed simulation and training center in place with all the different areas of knowledge represented, i.e. pre-hospital medicine as well as simulation and visualization technology.
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| 14. |
- Balachandran, Arvind, 1994-, et al.
(författare)
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Experimental Evaluation of Battery Impedance and Submodule Loss Distribution for Battery Integrated Modular Multilevel Converters
- 2022
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Ingår i: 2022 24TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE22 ECCE EUROPE). - : Institute of Electrical and Electronics Engineers (IEEE). - 9789075815399 - 9781665487009
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Konferensbidrag (refereegranskat)abstract
- Greenhouse gas emissions and the increase in average global temperature are growing concerns now more so than ever. Therefore it is of importance to increase the use of alternative energy sources, especially in the automotive industry. Battery electric vehicles (BEV) have gained popularity over the past several years. However, the performance of a BEV is limited by the battery pack, in particular, the weakest cell in the pack. Therefore, improved cell controllability and high efficiency are seen as important directions for research and development and one direction where it can be achieved is through using battery-integrated modular multilevel converters (BI-MMC). The battery current in BI-MMCs contains additional harmonics and the frequency dependent losses of these harmonics are determined by the resonance between the battery and the DC-link capacitor bank. The paper presents an experimental validation of previously published theoretical results for both harmonic allocations and loss distribution at the switching frequency within the BI-MMC submodule. Furthermore, a methodology for measuring the battery impedance using the full-load converter switching currents is presented.
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| 15. |
- Bivall Persson, Petter, 1979-, et al.
(författare)
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Designing and Evaluating a Haptic System for Biomolecular Education
- 2007
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Ingår i: IEEE Virtual Reality Conference, 2007. VR '07.. - Piscataway, NJ, USA : IEEE. - 1424409063 ; , s. 171-178
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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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| 16. |
- Bivall Persson, Petter, 1979-, et al.
(författare)
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Evaluating the Effectiveness of Haptic Visualization in Biomolecular Education - Feeling Molecular Specificity in a Docking Task
- 2006
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Ingår i: 12th IOSTE Symposium. - : Universiti Science Malaysia. - 9832700396 ; , s. 745-752
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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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| 17. |
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| 18. |
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| 19. |
- Butler, Simon, et al.
(författare)
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An Investigation of Work Practices Used by Companies Making Contributions to Established OSS Projects
- 2018
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Ingår i: ICSE-SEIP '18 Proceedings of the 40th International Conference on Software Engineering: Software Engineering in Practice. - New York : Association for Computing Machinery (ACM). - 9781450356596 ; , s. 201-210
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Konferensbidrag (refereegranskat)abstract
- Professionals contribute to open source software (OSS) projects aspart of their employment. Previous research has addressed motivationsof individuals and the ways they engage with OSS projects.However, there is a lack of research which examines and explainswork practices used by companies in their engagement with projects.Work practices used by companies to contribute to five establishedOSS projects are investigated through examination of the actions ofemployees in public communication channels and draw on our experienceswhen analysing engagement with the same projects. Wefind that companies utilise work practices for contributing whichare congruent with the circumstances and their capabilities thatsupport their short and long term needs. We find that companiescontribute to OSS projects in different ways, such as employing coreproject developers, making donations, and joining project steeringcommittees in order to advance strategic interests.
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| 20. |
- Chen, Chao, 1989-, et al.
(författare)
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Mathematical modelling of molten alloy mixing in a continuous casting tundish - A hydrodynamic study
- 2015
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Ingår i: Proceedings of the 6th International Congress on the Science and Technology of Steelmaking, ICS 2015. - : Chinese Society for Metals. ; , s. 407-411
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Konferensbidrag (refereegranskat)abstract
- The emergence of the nozzle clogging have inspired steelmakers to optimize the alloying routine from alloying in ladle to alloying in tundish or in continuous casting mould. Meanwhile, wire injection in tundish has been shown to be successful for postalloying and tundish temperature adjustment. However, there is limited information on the continuous feeding of alloy in tundishes. There are three aspects to be considered: a) "alloy melting", b) "alloy particle dispersion" and c) "liquid alloy mixing". In the present paper, the "liquid alloy mixing" process is studied using CFD (Computational Fluid Dynamics) from a hydrodynamic perspective. In the simulation, the molten alloy is described by the density coupled mixed composition fluid model, which has been verified and validated by water modelling experiments using black ink and KCl tracer mixing in water as a priori. In the present model, the density of the liquid alloy is assumed to be 1.15 or 0.85 times of that of the liquid steel. Thereafter, the denser alloy injection at two positions has been studied, i.e. near the inlet (L1) and at the centre of the tundish (L2). The results indicate that the breakthrough time for the mass fraction of alloy at the outlet are about 100s for both locations. The difference is when the alloy was injected at the center (L2), there is a bypassing flow above the dam. As a result, the mass fraction of alloy at the outlet increases rapidly but the homogeneity in the tundish bath is reduced. Moreover, the denser alloy injection with different velocities was studied. The result shows that the mixing is slightly enhanced during the initial injection stage for the big velocity case. Besides, a test simulation on the mixing of a lighter alloy indicates that the alloy is floating to the top surface.
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