Mariëlle Aarts

Mariëlle Aarts
Eindhoven University of Technology | TUE · Department of Built Environment

Doctor of Philosophy

About

62
Publications
22,274
Reads
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835
Citations
Introduction
Mariëlle (P.J.) Aarts, Ph.D. currently works at the Department of Built Environment, Eindhoven University of Technology. Her research focusses around light and lighting in relation to users of the built environment. The current project she is working on is 'CHEH: Creating Healthy Environments - Hospitals'. The aim is to identify how light can support patient safety via care professionals, in this case hospital nurses. Topics are related to visual and non-image forming aspects of light.
Additional affiliations
August 2001 - February 2016
Eindhoven University of Technology
Position
  • Professor (Assistant)
August 2001 - present
Eindhoven University of Technology
Position
  • Professor (Assistant)
Description
  • Setting up, organising and lecturing courses related to building design, building physics, and lighting (design). Courses both on Bachelor as on Master level for groups as individual (PhD) students. Multiple times nominated for Teacher of the Year.

Publications

Publications (62)
Article
Full-text available
Nightshift workers go against the natural sleep–wake rhythm. Light can shift the circadian clock but can also induce acute alertness. This placebo-controlled exploratory field study examined the effectiveness of light glasses to improve alertness while reducing the sleep complaints of hospital nurses working nightshifts. In a crossover within-subje...
Thesis
Western societies face the challenge of maintaining the current high standard of healthcare. Due to an aging population which leads to more people with a chronic disease, the shortage of care professionals is increasing even further. The aim of this project was to determine how lighting can support hospital nurses in their work as well as keeping c...
Article
Full-text available
In in-patient care facilities, 1 in 5 medication doses is administered incorrectly. A hospital environment which supports the performance of the health-care staff will positively impact patient safety. Objectives Determine which lighting leads to the least reading mistakes of medication labels. Design Experimental study with repeated measures. S...
Article
Full-text available
Abstract Studies among people with dementia demonstrated that the sleep quality and rhythm improves significantly when people are exposed to ambient bright light. Since almost half of the healthy elderly people also indicate to suffer from chronic sleep disorders, the question arises whether ambient bright light can be beneficial to healthy elderly...
Article
Full-text available
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...
Conference Paper
Full-text available
As the interest in design applications related to responses to light beyond vision is growing, two simulation tools, ALFA and Lark, have been developed to incorporate spectral characteristics of light in the evaluation of indoor lighting conditions. The spectral characteristics of light are of particular relevance when studying ipRGC-influenced res...
Article
Full-text available
Light via our eyes influences visual performance, visual comfort and visual experience, but also affects several health related, non-image-forming (NIF) responses. New metrics have been developed to quantify the NIF effects of light. In order to incorporate these in lighting design practice, simulation tools are required that are able to process in...
Article
Full-text available
Nightshift work can negatively impact sleep, performance, and health. Careful manipulation of light exposure patterns can help reduce these negative effects but is challenging in conditions of rapidly rotating shiftwork and due to individual differences. As chronotype is related to shiftwork tolerance, we explored patterns of sleep, sleepiness, and...
Article
Full-text available
Recent developments in the lighting research field have demonstrated the importance of a proper exposure to light to mediate several of our behavioral and physiological responses. However, we spend nowadays around 90% of our time indoors with an often quite limited access to bright daylight. To be able to anticipate how much the built environment a...
Article
Full-text available
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 l...
Conference Paper
Full-text available
A growing area of research focuses on the relationship between ocular light exposure and the non-visual responses. In order to accelerate research on this topic and improve building design, reliable spectral simulation tools are needed. This study aims at validating two of them, Lark and ALFA, by comparing their outcomes against daylight measuremen...
Article
Full-text available
Background Light exposure affects mood and sleep regulation. Sleep problems and mood complaints are common in elderly with intellectual disabilities (ID) living in care facilities. Insufficient light exposure is hypothesised to contribute to the high prevalence of these problems. The current study is the first to describe the personal light exposu...
Article
Full-text available
Light enables us to see and perceive our environment but it also initiates effects beyond vision, such as alertness. Literature describes that at least six factors are relevant for initiating effects beyond vision. The exact relationship between these factors and alertness is not yet fully understood. In the current field study, personal lighting c...
Article
Full-text available
The main reason lighting control is being applied is to reduce energy consumption. However, there are many more reasons for lighting control to be optimised in buildings. Lighting systems can be controlled to enhance or optimise effects beyond vision. Automatic control of electric lighting systems or daylight systems is one way of adjusting someone...
Article
Full-text available
Background: Light and alertness studies have applied different measurement methodologies to determine lighting conditions. However, it has been demonstrated that researchers rarely measure or describe the lighting conditions of their studies in sufficient detail to generalize conclusions or derive universal guidelines. Objective: Part I of this...
Conference Paper
Full-text available
A hospital environment should support the healing process of patients but also consider the needs of the care professionals. Staff shortages are growing, which stresses the importance to keep current staff healthy, vital, satisfied, and the quality of care high. Access to daylight and an exterior view in the workplace have demonstrated to release s...
Article
Full-text available
Dynamic lighting is one of the new trends in lighting research; providing the right lighting level at the right time could possibly increase the alertness and performance of office workers. However, they might have preferences that deviate from this “healthy” lighting. Simultaneously, the building environment becomes increasingly automated, with oc...
Chapter
Highly granular lighting control involves switching on and off luminaires based on individual occupancy. The resulting high frequency of lighting changes can distract the office workers and negatively impact their work performance. In a cubicle office, this might be less of an issue than in an office without partitions, as users do not have an over...
Chapter
Full-text available
Research demonstrated a large variety regarding effects of light (e.g. health, performance, or comfort effects). Since human health is related to each individual separately, the lighting conditions around these individuals should be analysed individually as well. This paper provides, based on a literature study, an overview identifying the currentl...
Article
Full-text available
The current field study investigated the ambiguities regarding the relationship between office lighting and subjective alertness. In laboratory studies, light-induced effects were demonstrated. Field studies are essential to prove the validity of these results and the potential recommendations for lighting in future buildings. Therefore, lighting m...
Article
Full-text available
Highly granular lighting control reduces the energy consumption of shared office spaces by automatically controlling lighting at unoccupied desks. Typically, lighting is switched off, but this approach results in non-uniform illuminance distributions. In offices where individual work areas are often not separated by partitions and occupants oversee...
Article
Full-text available
Background: For treating affective disorders like SAD, light therapy is used although the underlying mechanism explaining this success remains unclear. To accelerate the research on defining the light characteristics responsible for inducing a specific effect a uniform manner for specifying the irradiance at the eye should be defined. This allows...
Article
Full-text available
Health symptoms may be influenced, supported, or even controlled via a lighting control system which includes personal lighting conditions and personal factors (health characteristics). In order to be effective, this lighting control system requires both continuous information on the lighting and health conditions at the individual level. A new pra...
Article
Full-text available
Purpose The International Commission on Illumination (CIE) recommends researchers to investigate a wide variety of behavioural and health outcomes. However, researchers often investigate only a part of occupational health (OH) in relation to light. A literature study (2002–2017) regarding the relationship between office lighting conditions and OH w...
Conference Paper
Full-text available
Light beneficially influences human health directly, but moreover, indirectly via occupant's satisfaction with lighting. This study identified parameters influencing occupant's satisfaction with lighting. During a five-day study, 46 office workers evaluated their office lighting conditions once a day using the Office Lighting Survey. The significan...
Conference Paper
Full-text available
The benefits of light in offices beyond enabling visual tasks have been demonstrated in former studies. Light positively influences outcome measures such as human's health, wellbeing, visual comfort, motivation, and environmental satisfaction. In order to measure the effects of light on the individual outcome measures, it is of high importance to c...
Article
Full-text available
Background: The non-image-forming effects of luminous radiation on people with intellectual disabilities or dementia received attention from researchers. Such studies, however, have generally been conducted using disparate methodologies which precludes generalization and reproducibility. Objective: The aim of this study was to determine the prac...
Article
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 ligh...
Article
The luminescent solar concentrator (LSC) could provide a colorful and adaptable complement to standard silicon solar panels, allowing easier deployment solar energy systems in the urban environment. In order to successfully implement this technological innovation into the built environment, it should also complement the surrounding architecture and...
Article
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 ligh...
Article
Full-text available
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 su...
Article
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 wa...
Conference Paper
Full-text available
This paper reports a study on the impact of different usage patterns of an automated blinds system on the energy consumption for heating and cooling in a Dutch office building. A five-month observational field study in 40 offices resulted into a dataset on the blinds usage of four types of blind users. This data was used to simulate the effect of t...
Conference Paper
Currently available state-of-the-art intelligent lighting systems have integrated occupancy and daylight harvesting sensors, offering the ability to have granular dimming in the office space. Each luminaire is capable to detect and respond independently to people’s presence at their workplaces as well as regulate luminaire output dependent on avail...
Article
Full-text available
The 'LIGHTVAN' research aims to optimize the lighting design for healthy schools and modern senior housing and care homes with regards to the use of light as a cheap and important source of energy. A multi-functional mobile light laboratory was built into a delivery van, the LIGHTVAN. This LIGHTVAN has two clear aims: With this mobile light labora...
Article
As a result of the technological advances and increasing focus on energy efficient buildings, simple forms of building automation including automatic motorized blinds systems found their ways into today’s office environments. In a five-month field study, qualitative and quantitative methods were used to investigate how office workers in 40 offices...
Conference Paper
Objective: Research has demonstrated that light has positive effects on the health and well-being of people with dementia. These studies demonstrating both short therm as long therm health effects used an electrical lighting system providing around 1000 lx vertically at eye level during the day time. When using light as a drug, unclear is what exac...
Article
Purpose: Several studies describe the importance of light for our physical and psychological wellbeing. Exposure to light can affect human experiences, performance, and physiology via both image-forming and non-image forming processes1. (Day)light is a key concept for life enrichment care facilities. 'Life enrichment care' is a concept based on hea...
Chapter
Light therapy is applied as treatment for a variety of problems related to health and ageing, including dementia. Light therapy is administered via light boxes, light showers, and ambient bright light using ceiling-mounted luminaires. Long-term care facilities are currently installing dynamic lighting systems with the aim to improve the well-being...
Article
The 'LIGHTVAN' research aims to optimize the lighting design for healthy schools and modern senior housing and care homes with regards to the use of light as a cheap and important source of energy.A multi-functional mobile light laboratory was built into a delivery van, the LIGHTVAN. This LIGHTVAN has two clear aims: With this mobile light laborato...
Article
Light therapy is increasingly administered and studied as a non-pharmacologic treatment for a variety of health-related problems, including treatment of people with dementia. Light therapy comes in a variety of ways, ranging from being exposed to daylight, to being exposed to light emitted by light boxes and ambient bright light. Light therapy is a...
Conference Paper
Full-text available
There 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 savi...
Conference Paper
Full-text available
The aim of this study was to locate the position in the communal living room of a newly build Dutch nursing home, which fulfill both needs most of the time, using only daylight. The time slots for the NIF effects (min. 1000 lx eye and were taken from 10-11 am and from 3- 4 pm and for visual needs between 9 am and 5pm. Real time measurements as well...
Conference Paper
Full-text available
The number of people suffering from dementia is estimated at around 24 million and will rise to 81 million at the year 2040. Behavioural (eg restlessness at night) and psychological symptoms mostly lead to the situation where people are no longer able to live in their own physical and social environment and become institutionalized. In different wa...
Article
Full-text available
It is hard to overestimate the importance that light has for the human condition. From the comforting atmosphere of a quietly lit living room, to the invigorating effects of morning light, preparing you for your day, light has dramatic effects on mood, health and pro-ductivity, and can deeply influence the way we experience an environment. Biologis...
Article
Full-text available
Non-pharmacologic interventions, such as high-intensity white light with a high output in the short-wavelength part of the spectrum can play an important role in the care for older people with dementia. In order to assess the effects of prolonged exposure to low intensity light, i.e., E < 500 lx, from a light source with a high correlated colour te...
Article
Full-text available
Behavioural and psychological symptoms, such as nocturnal restlessness and wandering, are seen in 90% of patients with dementia at some point in their course. Non-pharmacologic interventions, such as high-intensity lighting, can play an important role in managing these behavioural and psychological symptoms by impacting both the visual and the circ...
Conference Paper
Full-text available
The design and realization of a healthy indoor environment is a challenge that is investigated from different perspectives at the unit Building Physics and Systems (BPS; Faculty of Architecture, Building and Planning) of Eindhoven University of Technology. Performance requirements (for instance, with respect to air quality, thermal comfort and ligh...
Conference Paper
Full-text available
Among 14 independently living, mobile and healthy elderly people in The Netherlands was conducted to see whether exposure duration of high intensity, natural, light is related to sleep quality, and more general the amplitude of the sleep-wake cycle. The elderly wore for 5 consecutive days in summer and 5 days in winter, an actiwatch, an apparatus m...
Article
Full-text available
A field study was carried out to learn more about the influence of light on the lives of elderly people. The results should lead to the development and design of a light concept for elderly people that will improve their everyday health and well-being. Methods Ninety one independently-living elderly people were questioned about their current living...
Conference Paper
To obtain more knowledge about the influence of light on the life of elderly, a field study is carried out. The results should give input to design a light concept for elderly, improving their health and well-being. The Technical University of Eindhoven together with TNO carried out the study. The first paragraph is an introduction. In the second p...
Article
SUMMARY Behavioural disturbances, such as nocturnal restlessness and wandering, are seen in 90% of patients with dementia at some point in their course. Non-pharmacologic interventions, such as high intensity lighting, can play an important role in managing these behavioural disturbances by impacting both the visual and the circadian system. In ord...

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Projects

Projects (2)
Project
One of the major societal challenges we are facing today is transforming healthcare so it becomes sustainable in terms of costs, availability and outcomes. In the project CHEH (Creating Healthy Environments - Hospitals) the focus is on improving healthcare effectiveness and outcomes by improving environmental conditions not only for patients, but particularly for professionals in hospitals. Other studies have shown that there is a direct correlation between staff satisfaction and patient satisfaction. The theme quality of life is addressed by describing health related quality of life outcomes for patients in terms of reductions of side effects after health treatment or an operation, quicker recovery after hospital admission, or reducing hospital (re-)admissions. Outcomes for professionals refers to comfort, well-being, work pleasure and safety, minimizing risks in care and appropriate care performance, resulting in improved staff retention and effectiveness.