| 1. |
- Aarts, Mariëlle P. J., et al.
(författare)
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Dynamic lighting systems in psychogeriatric care facilities in the Netherlands : A quantitative and qualitative analysis of stakeholders’ responses and applied technology
- 2015
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Ingår i: Indoor + Built Environment. - 1420-326X .- 1423-0070. ; 24:5, s. 617-630
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Tidskriftsartikel (refereegranskat)abstract
- Long-term care facilities are currently installing dynamic lighting systems with the aim to improve the well-being and behaviour of residents with dementia. The aim of this study was to investigate the implementation of dynamic lighting systems from the perspective of stakeholders and the performance of the technology. Therefore, a questionnaire survey was conducted with the management and care professionals of six care facilities. Moreover, light measurements were conducted in order to describe the exposure of residents to lighting. The results showed that the main reason for purchasing dynamic lighting systems lied in the assumption that the well-being and day/night rhythmicity of residents could be improved. The majority of care professionals were not aware of the reasons why dynamic lighting systems were installed. Despite positive subjective ratings of the dynamic lighting systems, no data were collected by the organizations to evaluate the effectiveness of the lighting. Although the care professionals stated that they did not see any large positive effects of the dynamic lighting systems on the residents and their own work situation, the majority appreciated the dynamic lighting systems more than the old situation. The light values measured in the care facilities did not exceed the minimum threshold values reported in the literature. Therefore, it seems illogical that the dynamic lighting systems installed in the researched care facilities will have any positive health effects.
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| 2. |
- Aarts, Mariëlle P.J., et al.
(författare)
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Performance of personally worn dosimeters to study non-image forming effects of light : Assessment methods
- 2017
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Ingår i: Building and Environment. - : Elsevier. - 0360-1323 .- 1873-684X. ; 117, s. 60-72
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Tidskriftsartikel (refereegranskat)abstract
- When determining the effects of light on human beings, it is essential to correctly measure the effects, and to correctly measure the adequate properties of light. Therefore, it is important to know what is being measured and know the quality of the measurement devices. This paper describes simple methods for identifying three quality indices; the directional response index, the linearity index and the temperature index. These indices are also checked for several commonly used portable light measurement devices. The results stresses what was already assumed, the quality and the outcome of these devices under different circumstances were very different. Also, the location were these devices are normally worn has an impact on the results. The deviation range between worn vertically at eye level and the wrist is between 11% (outdoor) to 27% (indoor). The smallest deviation, both in indoor and outdoor, was found when the device was placed on the sides of the eye (7%).
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| 3. |
- Aarts, Mariëlle P. J., et al.
(författare)
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Shedding a light on phototherapy studies with people having dementia : A critical review of the methodology from a light perspective
- 2016
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Ingår i: American Journal of Alzheimer’s Disease and Other Dementia. - : Sage Publications. - 1533-3175 .- 1938-2731. ; 31:7, s. 551-563
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Tidskriftsartikel (refereegranskat)abstract
- Light therapy is applied to older people with dementia as a treatment to reset the biological clock, to improve the cognitive functioning, and to reduce behavioral symptoms. Although the methodological quality of light therapy studies is essential, many aspects concerning the description of the lighting applied are missing. This study reviewed light therapy studies concerning the effects on people with dementia as a way to check the methodological quality of the description of light from a light engineering perspective. Twelve studies meeting the inclusion criteria were chosen for further analysis. Each study was scored on a list of aspects relevant to a proper description of lighting aspects. The overview demonstrates that the overall quality of the methodologies is poor. The studies describe the lighting insufficiently and not in the correct metrics. The robustness of light therapy studies can be improved by involving a light engineer or specialist.
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| 4. |
- Adamsson, Mathias, et al.
(författare)
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A holistic approach for a natural light variation experience : a pilot study of a practical application for office lighting
- 2019
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Konferensbidrag (refereegranskat)abstract
- Lighting is crucial for vision and has important effects beyond vision, influencing a variety of physiological and behavioral processes. When designing lighting, visual aspects, effects beyond vision, and perception of the environment should be considered together in a holistic approach. As humans evolved under daylight, a lighting protocol, based on a room context and daylight characteristics, was developed and described. The lighting, with customized light levels, spectral composition and light distribution that changed dynamically to evoke a perception of daylight conditions, was realized using commercially available luminaires and a digital control system. The resulting lighting conditions are described by measurements.
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| 5. |
- Aries, Myriam, et al.
(författare)
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Assessment protocol and effects of two dynamic light patterns on human well-being and performance in a simulated and operational office environment
- 2020
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Ingår i: Journal of Environmental Psychology. - : Elsevier. - 0272-4944 .- 1522-9610. ; 69
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Tidskriftsartikel (refereegranskat)abstract
- Sophisticated electric lighting solutions like tuneable white-light LED-systems, varying in light amount and/or colour temperature, can help to supplement or mimic daylight. Today's office environments are increasingly being equipped with dynamic lighting solutions even though it is yet unknown what a dynamic pattern looks like to optimally support human performance and well-being. In a pilot study, a dual-experimental methodology was employed to examine the effects of a dynamic lighting pattern. Two opposite dynamic electric light patterns were applied both in a controlled laboratory study as well as in a quasi-controlled field study. A momentary questionnaire concerning different aspects of well-being was repeated multiple times during the duration of the experiment, complemented by two performance tasks. The current results were inconclusive and inconsistent between the two study types, carefully pointing at the need to test dynamic light patterns in the field before implementing it in a real office environment.
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| 6. |
- Aries, Myriam, et al.
(författare)
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Climate change consequences for the indoor environment
- 2009
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Ingår i: Heron. - 0046-7316 .- 1574-4078. ; 54:1, s. 49-70
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Tidskriftsartikel (refereegranskat)abstract
- Scientists warn us about climate change and its effects on the outdoor environment. These effects can have significant consequences for the indoor environment, also in the Netherlands. Climate changes will affect different aspects of the indoor environment as well as the stakeholders of that indoor environment. Buildings will require less heating in the winter and more cooling in the summer, resulting in an increase use of air conditioning systems. Increasing relative humidity indoors and rising moisture from the ground will cause significantly more mould problems resulting in further health risks. Additionally, effects on lighting and acoustical quality, but also several psycho-social effects seem likely to occur. It is concluded that possible adaptations, whether performed at the source of climate change effects, the building or by involving people, can only be executed properly when the possible effects of climate changes on occupant wishes and needs as well as the interactions of these occupants with their environment are well understood.
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| 7. |
- Aries, Myriam, et al.
(författare)
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Daylight and health : A review of the evidence and consequences for the built environment
- 2015
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Ingår i: Lighting Research and Technology. - : SAGE Publications. - 1477-1535 .- 1477-0938. ; 47:1, s. 16-27
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Tidskriftsartikel (refereegranskat)abstract
- Daylight has been associated with multiple health advantages. Some of these claims are associations, hypotheses or beliefs. This review presents an overview of a scientific literature search on the proven effects of daylight exposure on human health. Studies were identified with a search strategy across two main databases. Additionally, a search was performed based on specific health effects. The results are diverse and either physiological or psychological. A rather limited statistically significant and well-documented scientific proof for the association between daylight and its potential health consequences was found. However, the search based on specific health terms made it possible to create a first subdivision of associations with daylight, leading to the first practical implementations for building design.
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| 8. |
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| 9. |
- Aries, Myriam
(författare)
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Editorial : Personalised lighting design
- 2022
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Ingår i: Lighting Research and Technology. - : Sage Publications. - 1477-1535 .- 1477-0938. ; 54:6, s. 513-513
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 10. |
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