| 1. |
- Bachinger, Angelika, et al.
(författare)
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Systematic evaluation of bromine-free flame-retardant systems in acrylonitrile-butadiene-styrene
- 2022
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Ingår i: Journal of Applied Polymer Science. - : John Wiley & Sons, Ltd. - 0021-8995 .- 1097-4628. ; 139:13
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Tidskriftsartikel (refereegranskat)abstract
- A systematic investigation of phosphorus-based flame-retardant (PFR) systems in acrylonitrile-butadiene-styrene (ABS) is presented. The effect of various PFRs, combinations thereof and influence of different synergists is studied in terms of fire and mechanical performance, as well as toxicity of resulting ABS. Sustainable flame-retardant systems with a promising effect on the fire-retardant properties of ABS are identified: A combination of aluminum diethylphosphinate and ammonium polyphosphate is shown to exhibit superior flame-retardant properties in ABS compared to other studied PFRs and PFR combinations. Among a variety of studied potential synergists for this system, a grade of expandable graphite with a high-initiation temperature and a molybdenum-based smoke suppressant show the most promising effect, leading to a significant reduction of the peak heat release rate as well as the smoke production rate. Compared to current state-of-the-art brominated flame-retardant for ABS, the identified flame-retardant systems reduce the maximum smoke production rate by 70% and the peak heat release rate by 40%. However, a significant reduction of the impact performance of the resulting ABS is identified, which requires further investigation.
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| 2. |
- Laine, Teemu H., et al.
(författare)
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A Distributed Multiplayer Game to Promote Active Transport at Workplaces : User-Centred Design, Implementation and Lessons Learned
- 2020
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Ingår i: IEEE Transactions on Games. - : IEEE. - 2475-1502 .- 2475-1510. ; 12:4, s. 386-397
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Tidskriftsartikel (refereegranskat)abstract
- Recent decline in active transport and increase in motorised transport decreases physical activity and increases air pollution. Using games to motivate people to change their behaviour towards active transport can mitigate this. We proposed Tic-Tac-Training, a distributed, collaborative and competitive game for promoting active transport at workplaces. Tic-Tac-Training was developed through a multidisciplinary and iterative user-centred design (UCD) process in four stages: (i) paper prototype, (ii) low-fidelity prototypes, (iii) high-fidelity prototypes, (iv) digital prototype. User testing and playtesting (N=12) yielded a number of improvement suggestions. We also analysed how Tic-Tac-Training supports the eight core drives of gamification (Octalysis), and presented 17 lessons learned in four categories. Findings suggest that UCD can be useful for developing exergame interventions for workplaces. Moreover, the lessons learned can benefit exergame designers. More research is needed to measure the behaviour change effect of Tic-Tac-Training and its applicability to other use cases.
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| 3. |
- Lindqvist, Anna-Karin, et al.
(författare)
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Moving From Idea to Action : Promoting Physical Activity by Empowering Adolescents
- 2014
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Ingår i: Health Promotion Practice. - : SAGE Publications. - 1524-8399 .- 1552-6372. ; 15:6, s. 812-818
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Tidskriftsartikel (refereegranskat)abstract
- Background. Physical activity provides fundamental health benefits for children and youth. The aim of the study was to explore the possibility of conducting an empowerment-inspired intervention and examine the impact of the intervention in promoting moderate and vigorous physical activity (MVPA) among adolescents. Method. A nonrandomized trial with a concurrent control group was carried out. Physical activity data were collected before and after the intervention with daily questions by short message service. Self-efficacy, social support, and attitude were also measured before and after the intervention since they were possible mediators. Results. The intervention was created by the students, the researchers, and the teachers using an empowerment-based approach. Students in the intervention group (n = 21) increased their MVPA on average by 4.9 (SD = 28.9) minutes per day, and students in the control group (n = 25) reduced their MVPA on average by 25.4 (SD = 23.0) minutes per day (p = .000). Conclusions. The intervention might have contributed to a promotion of physical activity among students in the intervention group. The most valuable contribution this study provides is the knowledge that it is possible to develop and conduct an empowerment-inspired intervention to promote adolescent physical activity.
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| 4. |
- Rutberg, Stina, et al.
(författare)
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My Way to School Through a Camera Lens: Involving Children to Inform a Policy Recommendation on Active School Travel
- 2024
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Ingår i: Health Promotion Practice. - : Sage Publications. - 1524-8399 .- 1552-6372.
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Tidskriftsartikel (refereegranskat)abstract
- Active school travel (AST) is an effective approach for increasing children’s physical activity and independent mobility, but policy supporting AST is lacking. This study aims to explore children’s experiences of AST to inform a policy recommendation. Photovoice methodology with a qualitative approach was applied, with children taking pictures on their way to school. This was followed by focus groups where the children explored their experiences of AST based on their photos. The data were analyzed using qualitative content analysis. The results show that the children valued independent mobility and wanted to be involved in decisions about their travels; they also expressed feelings of increased responsibility and personal growth as a consequence. Although the children recognized areas of improvement regarding infrastructure, especially regarding heavy traffic that jeopardized travel safety, they continued using AST. Finally, the children talked about the value of the health and environmental benefits of AST. Opportunities for friendship, play, and making decisions about their own time were highlighted as important incentives. The benefits from AST are many for children, as well as for society. The result has informed policy recommendations for AST, and the children’s input will be used to communicate the recommendations. Listening to the voices of children could be a steppingstone toward forming future healthy mobility initiatives. In that process, it is key to include children’s perspectives when formulating the AST policy for successful adoption and implementation.
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