| 1. |
- Backlund, Per, 1964-, et al.
(författare)
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Enhancing Immersion with Contextualized Scenarios: Role-Playing in Prehospital Care Training
- 2015
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Ingår i: 2015 7th International Conference on Games and Virtual Worlds for Serious Applications (VS-Games). - Skövde : IEEE Computer Society. ; , s. 167-170
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Konferensbidrag (refereegranskat)abstract
- This paper reports on a field experiment with 12 paramedic teams (n=24) exploring how they perceive a novel training approach. The feeling of being engaged in training (i.e. being immersed) is often held forward as a major benefit of roleplaying exercises. Engagement is expected to raise the quality of training as well as improving learning and retention. However, much simulation-based training in prehospital care is decontextualized, meaning that medical care is trained without taking other characteristics of prehospital care into account. In this paper we investigate how a richer setting (contextualization), which includes more of the complicating aspects of prehospital care, affects the perceived immersion of the participants. The results show that contextualization has a significant positive impact on perceived immersion. These results are important for further studies on how to organize and design role-playing exercises.
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| 2. |
- Berg, Jan, et al.
(författare)
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In-ear vs. loudspeaker monitoring for live Sound and the effect on audio quality attributes and musical performance
- 2017
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Ingår i: 142nd Audio Engineering Society International Convention 2017, AES 2017.
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Konferensbidrag (refereegranskat)abstract
- A successful performance of live music is dependent on how well musicians can hear themselves and the other members of the ensemble. Sound reinforcement systems can offer monitoring either by on-stage loudspeakers or in-ear headphones. These two monitoring conditions were compared to search for perceived auditory differences that affect parts of musical performance. Four jazz/pop/rock bands made live performances where monitor sound was provided to the musicians. Each band repeated their performance, changing from one monitoring condition to the other. After every performance, the musicians responded to questionnaires covering musical performance and audio quality. Experts also assessed recordings of the performances. Results show that perceived differences exist in audio quality and musical performance between loudspeaker monitors and in-ear headphone monitors.
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| 3. |
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| 4. |
- Klintberg, Emil, 1989, et al.
(författare)
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A primal active-set minimal-representation algorithm for polytopes with application to invariant-set calculations
- 2018
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Ingår i: Proceedings of the IEEE Conference on Decision and Control. - 2576-2370 .- 0743-1546. ; 2018-December, s. 6862-6867
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Konferensbidrag (refereegranskat)abstract
- This paper provides a description of a practically efficient minimal-representation algorithm for polytopes. The algorithm is based on a primal active-set method that heavily exploits warm-starts and low-rank updates of matrix factorizations in order to reduce the required computational work. By using a primal active-set method, several nonredundant inequalities can be identified for each solved linear program. Implementation details are provided both for the minimalrepresentation algorithm and for the underlying active-set method.
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| 5. |
- Nilsson, Magnus, et al.
(författare)
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ADMM applied to energy management of ancillary systems in trucks
- 2015
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Ingår i: American Control Conference. - 0743-1619. - 9781479986842 ; 2015-July, s. 3459-3466
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Konferensbidrag (refereegranskat)abstract
- This paper investigates how recently endorsed methods in distributed optimization can be exploited in the energy-management problem for heavy trucks, with focus on improved control of ancillary systems. The justification for investigating this is because it may offer higher modularity and integrity to the development process of vehicle models. This paper assumes an indirect approach for solving the optimal control problem. For simplicity, a multi-level control hierarchy is also assumed, where prediction and integer decisions are planned at a higher level, while real-time decisions take place at a lower level. This allows the higher level to deliver an estimate of optimal costates to the lower level. Convex models of ancillary components allow the problem to be formulated as a second-order cone program at the lower level, which can be reformulated as an exchange problem suitable for distributed control. The exchange problem is solved using the alternating direction method of multipliers with proximal message passing, which returns a solution with the same fuel economy as that from dynamic programming. Convergence properties are briefly discussed, where the most notable conclusion is that warm start gives a significant improvement on the convergence rate, supporting practical feasibility of the distributed approach.
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| 6. |
- Nilsson, Magnus, et al.
(författare)
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Assessing the potential of prediction in energy management for ancillaries in heavy-duty trucks
- 2014
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Ingår i: 2014 European Control Conference, ECC 2014. - : Institute of Electrical and Electronics Engineers Inc.. - 9783952426913 ; , s. 1693-1698
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Konferensbidrag (refereegranskat)abstract
- The degree of importance of prediction in the control of ancillary systems for conventional heavy-duty trucks is investigated, with focus on fuel economy. An optimal control law that utilizes prediction is compared with a suboptimal causal control law. The incentive for this investigation is that the suboptimal control law is less complex to develop and implement for the considered system. The results are not general since only a limited amount of ancillary systems have been modeled, only two different drive cycles have been evaluated and simplified mathematical component models for a specific test truck have been used in the optimization problem. Nevertheless, preliminary results from this investigation indicate that simple suboptimal control laws can yield close to the same improvements in fuel efficiency as a predictive controller, when compared to a baseline control law. Tuning complexity is expected to rise when more ancillaries are included in the energy management problem. This can be a valid argument to incorporate prediction in future work.
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| 7. |
- Nilsson, Magnus, 1978, et al.
(författare)
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Combined platooning and energy management with high integrity
- 2015
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Ingår i: International Conference on Energy Efficient Vehicles (ECEEV).
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The message of this contribution is a control hierarchy and formulation of the energy management problem that allows combined platooning and energy management to be solved with distributed algorithms, thereby providing high integrity to individual vehicles in the platoon. This could be of interest to investigate further for high-integrity multi-vendor cooperative driving in the future, since most approaches to energy management today relies on optimization in one form or the other.
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| 8. |
- Nilsson, Magnus, et al.
(författare)
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Convex optimization for auxiliary energy management in conventional vehicles
- 2014
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Ingår i: 2014 IEEE Vehicle Power and Propulsion Conference, VPPC 2014. - : Institute of Electrical and Electronics Engineers Inc.. - 9781479967834
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Konferensbidrag (refereegranskat)abstract
- This submission deals with energy management of automotive ancillary systems, and how to find suitable control actions that can improve fuel economy compared to control laws that do not exploit the storage potential of energy buffers. The main focus lies on how to model components to fit within the framework of convex optimization. The resulting convex models allow the energy-management problem to be formulated as a second-order cone program. Higher levels of a control hierarchy deliver an estimate of optimal costates to a lower level, where the problem is repeatedly solved with the recently developed Embedded Conic Solver (ECOS).
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| 9. |
- Nykänen, Arne, 1973-, et al.
(författare)
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Do In-ear monitors protect musicians' hearing?
- 2017
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Ingår i: 142nd Audio Engineering Society International Convention 2017, AES 2017.
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Konferensbidrag (refereegranskat)abstract
- In-ear monitors for live performances are commonly considered to give better sound quality than loudspeaker monitors. They are also often assumed to reduce sound exposure. Because of lack of evidence for this, sound exposure for pop/rock/jazz musicians was compared between performances with in-ear and loudspeaker monitors. Equivalent sound pressure levels at the musicians' ears were 94 to 105 dBA with loudspeaker and 86 to 108 dBA with in-ear monitors. Many participants used earplugs when using loudspeaker monitors. Therefore, the recommendation, from a pure hearing protection perspective, is to use loudspeaker monitors and earplugs. However, the large spread in levels between musicians using in-ear monitors suggests that with better training and measurements of sound exposure, in-ear monitors could be used safely.
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| 10. |
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