262 research outputs found
User experience of automated blinds in offices
Full text linkThere are clear economical drivers for ambient intelligent office environments. For example, the energy and cost savings that can be made by automatically switching off the light when people are not in a room or by dimming the electric light if sufficient daylight is available. The intelligent behavior should not only result in energy and cost savings, but also make sure that occupants are satisfied with and feel in control of their working environment. However, automation might reduce this feeling of control. If decisions are based solely on economic criteria such as energy saving, the resulting conditions might not be beneficial for the comfort of occupants. A balance between energy efficiency and comfort needs to be found. As a large part of the population spends a significant part of the day in an office environment, it is not surprising to see an increasing awareness of user comfort in office buildings. Besides the positive effects of a comfortable work environment on the health and wellbeing of office workers, studies have shown correlations between the level of comfort and job satisfaction, and even productivity (Boyce, 2003). Hence, there are also economic reasons for employers and building owners to focus on comfortable work environments. Although comfort is a subjective concept, much research has been done on objective determinants and measures of comfort. Many aspects have been identified that influence the perception of comfort in offices, including environmental aspects (e.g. building characteristics, climate), social aspects (e.g. relationships with colleagues), and personal aspects (e.g. gender, age) (Bluyssen et al., 2011). It is unclear how all of these different aspects relate to each other and contribute to an overall perception of comfort, but studies have shown the importance of individual aspects such as daylight and electric lighting on perception of comfort. The perception of control is an important psychological process that influences perceived lighting quality and satisfaction with the working environment (Veitch, 2001). In this paper, we report our work on the user experience of automated daylight control systems in relation to occupants’ perceived comfort with the indoor climate
User experience of automated blinds in offices
Full text linkThere are clear economical drivers for ambient intelligent office environments. For example, the energy and cost savings that can be made by automatically switching off the light when people are not in a room or by dimming the electric light if sufficient daylight is available. The intelligent behavior should not only result in energy and cost savings, but also make sure that occupants are satisfied with and feel in control of their working environment. However, automation might reduce this feeling of control. If decisions are based solely on economic criteria such as energy saving, the resulting conditions might not be beneficial for the comfort of occupants. A balance between energy efficiency and comfort needs to be found. As a large part of the population spends a significant part of the day in an office environment, it is not surprising to see an increasing awareness of user comfort in office buildings. Besides the positive effects of a comfortable work environment on the health and wellbeing of office workers, studies have shown correlations between the level of comfort and job satisfaction, and even productivity (Boyce, 2003). Hence, there are also economic reasons for employers and building owners to focus on comfortable work environments. Although comfort is a subjective concept, much research has been done on objective determinants and measures of comfort. Many aspects have been identified that influence the perception of comfort in offices, including environmental aspects (e.g. building characteristics, climate), social aspects (e.g. relationships with colleagues), and personal aspects (e.g. gender, age) (Bluyssen et al., 2011). It is unclear how all of these different aspects relate to each other and contribute to an overall perception of comfort, but studies have shown the importance of individual aspects such as daylight and electric lighting on perception of comfort. The perception of control is an important psychological process that influences perceived lighting quality and satisfaction with the working environment (Veitch, 2001). In this paper, we report our work on the user experience of automated daylight control systems in relation to occupants’ perceived comfort with the indoor climate
Exploring the relationship between light and subjective alertness using personal lighting conditions
Full text linkJournal of Physics: Conference Series
Paper • The following article is Open access
Exploring the relationship between light and subjective alertness using personal lighting conditions
J. van Duijnhoven1, M.P.J. Aarts1, E.R. van den Heuvel2 and H.S.M. Kort3,4
Published under licence by IOP Publishing Ltd
Journal of Physics: Conference Series, Volume 2042, CISBAT 2021 Carbon-neutral cities - energy efficiency and renewables in the digital era 8-10 September 2021, EPFL Lausanne, Switzerland Citation J. van Duijnhoven et al 2021 J. Phys.: Conf. Ser. 2042 012119
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Author affiliations
1 Building Lighting Group, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands
2 Stochastics, Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, The Netherlands
3 Research Centre Healthy and Sustainable Living, University of Applied Sciences Utrecht, Utrecht, The Netherlands
4 Building Healthy Environments for Future Users Group, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands
DOI
https://doi.org/10.1088/1742-6596/2042/1/012119
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Abstract
The discovery of the ipRGCs was thought to fully explain the mechanism behind the relationship between light and effects beyond vision such as alertness. However, this relationship turned out to be more complicated. The current paper describes, by using personal lighting conditions in a field study, further exploration of the relationship between light and subjective alertness during daytime. Findings show that this relationship is highly dependent on the individual. Although nearly all dose-response curves between personal lighting conditions and subjective alertness determined in this study turned out to be not significant, the results may be of high importance in the exploration of the exact relationship
Acceptable fading time of a granular controlled lighting system for co-workers in an open office
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Acceptable fading time of a granular controlled lighting system for co-workers in an open office
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