| 1. |
- Johannesson, Lars, 1979, et al.
(författare)
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Look-ahead Vehicle Energy Management with Traffic Predictions
- 2015
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Ingår i: IFAC-PapersOnLine. - : Elsevier BV. - 2405-8963. ; 48:15, s. 244-251
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a vehicle energy management system that uses information about upcoming topography and speed limits along the planned route to schedule the speed and the gear shifts of a heavy diesel truck. The proposed control scheme divides the predictive control problem into two layers that operate with different update frequencies and prediction horizons. The focus in the paper is on the top layer that plans the vehicle speed in a convex optimization problem leaving the gear decision to be optimized in the lower layer in a dynamic program. The paper describes how predictive information of the movement pattern of surrounding vehicles can be incorporated into the convex optimization of the vehicle speed by using a moving time window constraint.
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| 2. |
- 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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| 3. |
- 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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| 4. |
- Backlund, Per, 1964-, et al.
(författare)
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The S.A.R.E.K Simulation Environment : Technical description of a flexible training environment for prehospital care
- 2017
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This report contains a technical description of the result of the S.A.R.E.K (Simulation – Ambulance – Research – Education - Kinship) collaboration project and the Sim2020 project. The projects are collaborations between researchers in healthcare and IT, and prehospital care practitioners, with the aim to design, develop and test a contextualized simulation environment for prehospital care. We built a simulation environment representing the full depth and width of a prehospital care process. Breadth refers to including all phases of a prehospital mission, from dispatch to handover; while depth refers to detailed representations and recreation of artefacts, information and context for each of these phases. This report outlines the details of the overall design, all equipment and practical solutions used to create this. Apart from the installation which is described in this report we have also developed methods and carried out a variety of tests and experiments which are reported elsewhere. The focus of this report is the system and its components.
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| 5. |
- Johannesson, Karin, 1982-, et al.
(författare)
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Phosphorus load variations and retention in non-point source wetlands in southern Sweden
- 2011
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Data from seven constructed wetlands receiving runoff from agricultural catchments in the south of Sweden were investigated with respect to phosphorus (P) retention. The seven wetlands differed in size (0.22-2 ha), design, land use and catchment characteristics. The hydraulic load varied between 7 and 725 m yr-1, which reflect the different geographical and hydrological conditions. The overall aim of this study was to increase the understanding of how water flow and inflow P concentration varations affect the P retention in constructed wetlands receiving runoff from arable land. Water flow was measured continuously, and time or flow proportional water samples were taken. Grab samples were taken during high flow periods and also to supplement the automatic water sampling. P retention varied between wetlands, from 1 to 58 kg ha-1 yr-1, and was correlated to the P load (R2=0.9, p<0.05). P retention in the wetlands varied strongly between years, and negative retention was recorded for some years and wetlands. When investigating monthly retention for each wetland, release of P corresponded to either high flow or possible anoxic conditions during low-flow periods in summer or during winter when ice covered the wetlands. Analyses of grab samples revealed a relationship between TP concentration and water flow for most wetlands. In some wetlands, P was transported mainly as particulate P (PP), but in other wetlands, soluble P was the dominating form in both inflow and outflow. Incoming concentrations varied greatly between wetlands (1-2000 μg l-1) which reflected the different catchment characteristics, e.g. land use, soil type and topography.
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| 6. |
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| 7. |
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| 8. |
- 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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| 9. |
- Engström, Henrik, 1968-, et al.
(författare)
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The impact of contextualization on immersion in healthcare simulation
- 2016
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Ingår i: Advances in Simulation. - : BioMed Central. - 2059-0628. ; 1
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundThe aim of this paper is to explore how contextualization of a healthcare simulation scenarios impacts immersion, by using a novel objective instrument, the Immersion Score Rating Instrument. This instrument consists of 10 triggers that indicate reduced or enhanced immersion among participants in a simulation scenario. Triggers refer to events such as jumps in time or space (sign of reduced immersion) and natural interaction with the manikin (sign of enhanced immersion) and can be used to calculate an immersion score.MethodsAn experiment using a randomized controlled crossover design was conducted to compare immersion between two simulation training conditions for prehospital care: one basic and one contextualized. The Immersion Score Rating Instrument was used to compare the total immersion score for the whole scenario, the immersion score for individual mission phases, and to analyze differences in trigger occurrences. A paired t test was used to test for significance.ResultsThe comparison shows that the overall immersion score for the simulation was higher in the contextualized condition. The average immersion score was 2.17 (sd = 1.67) in the contextualized condition and −0.77 (sd = 2.01) in the basic condition (p < .001). The immersion score was significantly higher in the contextualized condition in five out of six mission phases. Events that might be disruptive for the simulation participants’ immersion, such as interventions of the instructor and illogical jumps in time or space, are present to a higher degree in the basic scenario condition; while events that signal enhanced immersion, such as natural interaction with the manikin, are more frequently observed in the contextualized condition.ConclusionsThe results suggest that contextualization of simulation training with respect to increased equipment and environmental fidelity as well as functional task alignment might affect immersion positively and thus contribute to an improved training experience.
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| 10. |
- Johannesson, Karin, 1982-, et al.
(författare)
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Temporal phosphorus dynamics affecting retention estimates in agricultural constructed wetlands
- 2017
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Ingår i: Ecological Engineering. - Amsterdam : Elsevier. - 0925-8574 .- 1872-6992. ; 103, s. 436-445
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Tidskriftsartikel (refereegranskat)abstract
- Data from seven constructed wetlands (CWs) in the south of Sweden were analyzed to investigate the effects of water flow and season on inflow phosphorus (P) concentrations and temporal P retention variations in CWs receiving runoff from arable land. The form of P (dissolved or particulate) during different water flows (high and low) and seasons (warm and cold) was investigated using the results of total P (TP) and phosphate analyzed in grab samples that had been collected regularly or occasionally during two to nine years, along with continuous water flow measurements.The form of inflow and outflow P (particulate or dissolved P) differed between CWs, and also varied with season and flow. For instance, in three of the CWs, particulate P (PP) dominated the inflow during the cold period with high flow, while during the other periods the proportion of PP was approximately 50%. In one CW situated in a catchment with high clay content, PP dominated both inflow and outflow at all times. The average clay content in catchment top soils was positively correlated to the flow-weighted inflow TP concentrations.In three CWs receiving runoff through drainage pipes, the relationship between TP concentrations (TPin) and water flow was positive, both during high and low flow, and during warm and cold period. However, in four CWs that received surface water runoff, the relationship between TPin and water flow was positive during high flow periods (i.e. the 25% sampling occasions with the highest flow), and during low flow and warm period, the relationship was negative in these four wetlands, indicating either anoxic stagnant water upstream or influence from rural wastewater.The temporal dynamics of P concentrations mean that in some of the CWs, the main part of the annual P retention may occur during a few days with high water flows. The correlation between concentration and water flow suggests that the water sampling strategy may have a considerable impact on retention estimates, as exemplified by some calculation examples.
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