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Publications (10 of 35) Show all publications
Chraibi, S., Creemers, P., Rosenkötter, C., van Loenen, E. J., Aries, M. & Rosemann, A. L. (2019). Dimming strategies for open office lighting: User experience and acceptance. Lighting Research and Technology, 51(4), 513-529
Open this publication in new window or tab >>Dimming strategies for open office lighting: User experience and acceptance
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2019 (English)In: Lighting Research and Technology, ISSN 1477-1535, E-ISSN 1477-0938, Vol. 51, no 4, p. 513-529Article in journal (Refereed) Published
Abstract [en]

Sensor-triggered control strategies can limit the energy consumption of lighting by considering the presence of users in the office and dimming lighting down when it is not needed. In multi-user offices, the application of occupancy-based dimming at room level limits the energy saving potential. However, zone- or desk-based dimming may affect the comfort of co-workers due to its dynamics. This paper reports the assessment by 17 participants (30–50 years of age) of occupancy-based dimming in a mock-up office, using different dimming speeds. Participants consisted of co-workers experiencing changes triggered by others, and actors triggering these light changes. While the participants performed an office-based task, the luminaire above the actors’ desk was dimmed from approximately 550 lx to 350 lx (average horizontal illuminance), and vice versa. The participants evaluated the dimming conditions regarding their noticeability and acceptability. The study showed that the noticeability of light changes due to dimming, increases when fading times become shorter. Dimming with a fading time of at least two seconds was experienced as acceptable by more than 70% of the participants. The results of this experiment provide insights to system behaviour that does not compromise user experience while addressing energy efficient use of electric lighting.

Place, publisher, year, edition, pages
Sage Publications, 2019
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-39443 (URN)10.1177/1477153518772154 (DOI)000471123500004 ()2-s2.0-85047421340 (Scopus ID)PP-klar JTH 2019;JTHByggnadsteknikIS (Local ID)PP-klar JTH 2019;JTHByggnadsteknikIS (Archive number)PP-klar JTH 2019;JTHByggnadsteknikIS (OAI)
Available from: 2018-05-16 Created: 2018-05-16 Last updated: 2019-08-19Bibliographically approved
Aries, M., Beute, F. & Fischl, G. (2019). Students in good mood appear slower and less accurate: A pilot study investigating dynamic lighting impact on students’ perception and performance. In: Proceedings of the 29th Session of the CIE: Washington D.C., USA, June 14 – 22, 2019, Volume 1 – Part 2. Paper presented at 29th Session of the CIE, Washington D.C., USA, June 14 – 22, 2019 (pp. 1297-1304). Vienna: The International Commission on Illumination, 1
Open this publication in new window or tab >>Students in good mood appear slower and less accurate: A pilot study investigating dynamic lighting impact on students’ perception and performance
2019 (English)In: Proceedings of the 29th Session of the CIE: Washington D.C., USA, June 14 – 22, 2019, Volume 1 – Part 2, Vienna: The International Commission on Illumination, 2019, Vol. 1, p. 1297-1304Conference paper, Published paper (Other academic)
Abstract [en]

Dynamic daylight can provide stimulation throughout the day. Since not all building spaces have access to enough daylight, electric lighting solutions can help substituting. The study investigated the effect of two opposite, daily dynamic light patterns to influence students’ mood and performance. In a mimicked open office space, 20 second-year students participated in a pilot study where they were exposed to light patterns changing in illuminance level over a day and filled out momentary assessments five times. Hierarchical Linear Models were employed to analyse the effect of light level as well as the timing of the exposure. Positive effects are shown for mood, but only for the pattern with a high morning light level. An afternoon boost may come too late to exert benefits. There are indications for performance-enhancing effects by use of dynamic light conditions, even though students seem to be slower and less accurate when in good mood.

Place, publisher, year, edition, pages
Vienna: The International Commission on Illumination, 2019
Keywords
human centric lighting, learning environment, performance, tuneable lighting
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:hj:diva-45152 (URN)10.25039/x46.2019.PO117 (DOI)978-3-902842-74-9 (ISBN)
Conference
29th Session of the CIE, Washington D.C., USA, June 14 – 22, 2019
Available from: 2019-06-27 Created: 2019-06-27 Last updated: 2019-06-27Bibliographically approved
Van Duijnhoven, J., Aarts, M., Aries, M., Rosemann, A. & Kort, H. (2019). Systematic review on the interaction between office light conditions and occupational health: Elucidating gaps and methodological issues. Indoor + Built Environment, 28(2), 152-174
Open this publication in new window or tab >>Systematic review on the interaction between office light conditions and occupational health: Elucidating gaps and methodological issues
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2019 (English)In: Indoor + Built Environment, ISSN 1420-326X, E-ISSN 1423-0070, Vol. 28, no 2, p. 152-174Article, review/survey (Refereed) Published
Abstract [en]

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 was performed to identify gaps and methodological issues.

Method: The OH outcomes investigated in this paper were grouped according to the International Classification of Diseases and analysed per category: physical and physiological health, mental health, eye health, sleep parameters and visual comfort.

Results: Findings from the literature study (20 eligible papers) showed that all OH aspects were mostly but not exclusively measured subjectively. Furthermore, most studies investigated only a fraction of office lighting parameters and OH aspects.

Conclusions: It seems that Correlated Colour Temperature (CCT) and illuminance mainly correlate with OH. However, this may also be explained by gaps and methodological issues in studies described in eligible papers. Based on the literature study, an overview was composed elucidating gaps and methodological issues of office lighting and OH studies. It can be used to design and target the purpose of light and health research.

Place, publisher, year, edition, pages
Sage Publications, 2019
Keywords
Mental health, Physical health, Luminous exposure, Daylight, Sleepiness, Office environment
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-37597 (URN)10.1177/1420326X17735162 (DOI)000456401800002 ()2-s2.0-85042427937 (Scopus ID)GOA JTH 2019;JTHByggnadsteknikIS (Local ID)GOA JTH 2019;JTHByggnadsteknikIS (Archive number)GOA JTH 2019;JTHByggnadsteknikIS (OAI)
Available from: 2017-10-11 Created: 2017-10-11 Last updated: 2019-08-19Bibliographically approved
Khademagha, P., Aries, M., Rosemann, A. L. P. & Loenen, E. J. v. (2018). A multidirectional spectral measurement method and instrument to investigate non-image-forming effects of light. Measurement science and technology, 29(8), Article ID 085902.
Open this publication in new window or tab >>A multidirectional spectral measurement method and instrument to investigate non-image-forming effects of light
2018 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 29, no 8, article id 085902Article in journal (Refereed) Published
Abstract [en]

Light directionality, spectrum, and relevant radiometric or photometric quantity are believed essential factors influencing the magnitude of non-image-forming effects. In this paper, a measurement method and an instrument (the multidirectional spectroradiometer - MuS) is proposed, which considers different light incidents and spectra simultaneously, therefore, enables measurement of light characteristics relevant for non-image-forming effects. The MuS consists of four spectroradiometers measuring in different directions. Four spectrometers using optical fibers were configured to measure the spectral irradiance within a wavelength range from 200 to 1100 nm with ~5.7 nm pixel resolution. Application of the MuS facilitates a better understanding of the non-image-forming light characteristics of spaces. The MuS is tested with stable electric lighting and with dynamic daylight conditions and is proven reliable to perform continuous spectral measurements in different directions simultaneously. Results show a substantial difference in measured radiation magnitude and spectral distribution in different directions, which suggests varying impact on non-image-forming effects.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2018
Keywords
light incident; spectrum; (day) lighting design; health and well-being
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-40766 (URN)10.1088/1361-6501/aac937 (DOI)000436958400001 ()2-s2.0-85050393631 (Scopus ID)JTHBebyggdIS (Local ID)JTHBebyggdIS (Archive number)JTHBebyggdIS (OAI)
Available from: 2018-06-25 Created: 2018-06-25 Last updated: 2018-09-17Bibliographically approved
Davoodi, A., Johansson, P., Henricson, M. & Aries, M. (2017). A Conceptual Framework for Integration of Evidence-Based Design with Lighting Simulation Tools. Buildings, 7(4), Article ID 82.
Open this publication in new window or tab >>A Conceptual Framework for Integration of Evidence-Based Design with Lighting Simulation Tools
2017 (English)In: Buildings, ISSN 2075-5309, E-ISSN 2075-5309, Vol. 7, no 4, article id 82Article, review/survey (Refereed) Published
Abstract [en]

The use of lighting simulation tools has been growing over the past years which has improved lighting analysis. While computer simulations have proven to be a viable tool for analyzing lighting in physical environments, they have difficulty in assessing the effects of light on occupant’s perception. Evidence-based design (EBD) is a design method that is gaining traction in building design due to its strength in providing means to assess the effects of built environments on humans. The aim of this study was to develop a conceptual framework for integrating EBD with lighting simulation tools. Based on a literature review, it was investigated how EBD and lighting simulation can be combined to provide a holistic lighting performance evaluation method. The results show that they can mutually benefit from each other. EBD makes it possible to evaluate and/or improve performance metrics by utilizing user feedback. On the other hand, performance metrics can be used for a better description of evidence, and to analyze the effects of lighting with more details. The results also show that EBD can be used to evaluate light simulations to better understand when and how they should be performed. A framework is presented for integration of lighting simulation and EBD

Place, publisher, year, edition, pages
MDPI, 2017
Keywords
Daylighting, evidence-based design (EBD), building performance simulation (BPS), performance-based design (PBD), computational modelling, lighting simulation tools, human-centric lighting design, post-occupancy evaluation (POE)
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-37558 (URN)10.3390/buildings7040082 (DOI)000419187100001 ()2-s2.0-85030649049 (Scopus ID)GOA JTH 2017,GOA HHJ 2017 (Local ID)GOA JTH 2017,GOA HHJ 2017 (Archive number)GOA JTH 2017,GOA HHJ 2017 (OAI)
Note

Special Issue: Building Design and Daylighting Performance

Available from: 2017-10-05 Created: 2017-10-05 Last updated: 2019-06-07Bibliographically approved
Kruisselbrink, T., Aries, M. & Rosemann, A. (2017). A Practical Device for Measuring the Luminance Distribution. International Journal of Sustainable Lighting, 19(1), 75-90
Open this publication in new window or tab >>A Practical Device for Measuring the Luminance Distribution
2017 (English)In: International Journal of Sustainable Lighting, ISSN 2586-1247, Vol. 19, no 1, p. 75-90Article in journal (Refereed) Published
Abstract [en]

Various applications in building lighting such as automated daylight systems, dynamic lighting control systems, lighting simulations, and glare analyzes can be optimized using information on the actual luminance distributionsof the surroundings. Currently, commercially available luminance distribution measurement devices are often not suitable for these kind of applications or simply too expensive for broad application. This paper describes the development of a practical and autonomous luminance distribution measurement device based on a credit card-sized single-board computer and a camera system. The luminance distribution was determined by capturing High Dynamic Range images and translating the RGB information to the CIE XYZ color space. The High Dynamic Range technology was essential to accurately capture the data needed to calculate the luminance distribution because it allows to capture luminance ranges occurring in real scenarios. The measurement results were represented in accordance with established methods in the field of daylighting. Measurements showed that the accuracy of the luminance distribution measurement device ranged from 5% to 20% (worst case) which was deemed acceptable for practical measurements and broad applications in the building realm.

Place, publisher, year, edition, pages
Kyung Hee University, 2017
Keywords
High Dynamic Range, Raspberry Pi, Measurement device, CIE XYZ, Luminance distribution, Single-board computer
National Category
Building Technologies
Identifiers
urn:nbn:se:hj:diva-36806 (URN)10.26607/ijsl.v19i1.76 (DOI)JTHBebyggdIS (Local ID)JTHBebyggdIS (Archive number)JTHBebyggdIS (OAI)
Available from: 2017-08-08 Created: 2017-08-08 Last updated: 2018-09-12Bibliographically approved
van Duijnhoven, J., Aries, M. & Rosemann, A. (2017). Meinung versus Messung: Wie Nutzer das Verhältnis von natürlichem und elektrischem Licht und die Effekte der Lichtsituation im Großraumbüro bewerten. Licht : Planung - Design - Technik - Handel, 69(5), 76-79
Open this publication in new window or tab >>Meinung versus Messung: Wie Nutzer das Verhältnis von natürlichem und elektrischem Licht und die Effekte der Lichtsituation im Großraumbüro bewerten
2017 (German)In: Licht : Planung - Design - Technik - Handel, ISSN 0171-5496, Vol. 69, no 5, p. 76-79Article in journal (Other academic) Published
Abstract [de]

Die in diesem Beitrag vorgestellte Studie fragt danach, wie Nutzer das Verhältnis von natürlichemj und künstlichem Licht an ihrem Arbeitsplatz im Grossraumbüro einschätzen. Sie vergleicht diese subjektive Validierung durch die Nutzer mit objektiven Messergebnissen. Zudem erhebt ein Fragebogen Daten zu Zufriedenheit und allgemeinem Befinden. In der anschliessenden statistischen Analyse werden Korrelationen zwischen den verschiedenen Parametern gesucht.

Place, publisher, year, edition, pages
Richard Pflaum Verlag, 2017
National Category
Building Technologies
Identifiers
urn:nbn:se:hj:diva-36807 (URN)JTHBebyggdIS (Local ID)JTHBebyggdIS (Archive number)JTHBebyggdIS (OAI)
Available from: 2017-08-08 Created: 2017-08-08 Last updated: 2017-08-08Bibliographically approved
Khademagha, P., Aries, M., Rosemann, A. & van Loenen, E. (2017). New method for analyzing a luminous environment considering non-image-forming effects of light. In: Luisa Brotas, Susan Roaf & Fergus Nicol (Ed.), Design to Thrive: Proceedings 2017, volume II, PLEA 2017 Proceedings: . Paper presented at Design to Thrive: Passive Low Energy Architecture (PLEA 2017), Edinburgh, 3-5 July, 2017 (pp. 3245-3252). Network for Comfort and Energy Use in Buildings (NCEUB)
Open this publication in new window or tab >>New method for analyzing a luminous environment considering non-image-forming effects of light
2017 (English)In: Design to Thrive: Proceedings 2017, volume II, PLEA 2017 Proceedings / [ed] Luisa Brotas, Susan Roaf & Fergus Nicol, Network for Comfort and Energy Use in Buildings (NCEUB) , 2017, p. 3245-3252Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Network for Comfort and Energy Use in Buildings (NCEUB), 2017
National Category
Building Technologies
Identifiers
urn:nbn:se:hj:diva-37311 (URN)978-0-9928957-5-4 (ISBN)
Conference
Design to Thrive: Passive Low Energy Architecture (PLEA 2017), Edinburgh, 3-5 July, 2017
Available from: 2017-09-14 Created: 2017-09-14 Last updated: 2018-09-11Bibliographically approved
de Bakker, C., Aries, M., Kort, H. & Rosemann, A. (2017). Occupancy-based lighting control in open-plan office spaces: A state-of-the-art review. Building and Environment, 112, 308-321
Open this publication in new window or tab >>Occupancy-based lighting control in open-plan office spaces: A state-of-the-art review
2017 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 112, p. 308-321Article in journal (Refereed) Published
Abstract [en]

Lighting accounts for a significant amount of electrical energy consumption in office buildings, up to 45% of the total consumed. This energy consumption can be reduced by as much as 60% through an occupant-dependent lighting control strategy. With particular focus on open-plan offices, where the application of this strategy is more challenging to apply due to differences in individual occupancy patterns, this paper covers (1) to which extent individual occupancy-based lighting control has been tested, (2) developed, and (3) evaluated. Search terms were defined with use of three categories, namely ‘occupancy patterns’, ‘lighting control strategy’, and ‘office’. Relevant articles were selected by a structured search through key online scientific databases and journals. The 24 studies identified as eligible were evaluated on six criteria: (1) study characteristics, (2) office characteristics, (3) lighting system characteristics, (4) lighting control design, (5) post-occupancy evaluation, and (6) conclusions, and this was used to answer the research questions. It was concluded that the strategy has not been tested yet with field studies in open-plan offices, but that it needs further development before it can be applied in these type of offices. Although lighting currently tends to be controlled at workspace level, many aspects of the strategy can be further developed; there is potential to further increase energy savings on lighting within open-plan office spaces. Individual occupancy-based lighting control requires further validation, focussing on the factors influencing its energy savings, on its cost effectiveness, and on its acceptability for users.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Occupancy patterns; Energy consumption; Lighting system; Office environment; User comfort; Post-occupancy evaluation
National Category
Building Technologies
Identifiers
urn:nbn:se:hj:diva-34100 (URN)10.1016/j.buildenv.2016.11.042 (DOI)000396296800027 ()2-s2.0-85000428272 (Scopus ID)JTHBebyggdIS (Local ID)JTHBebyggdIS (Archive number)JTHBebyggdIS (OAI)
Available from: 2016-11-28 Created: 2016-11-28 Last updated: 2018-09-17Bibliographically approved
Aarts, M. P. .., van Duijnhoven, J., Aries, M. B. C. & Rosemann, A. L. .. (2017). Performance of personally worn dosimeters to study non-image forming effects of light: Assessment methods. Building and Environment, 117, 60-72
Open this publication in new window or tab >>Performance of personally worn dosimeters to study non-image forming effects of light: Assessment methods
2017 (English)In: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 117, p. 60-72Article in journal (Refereed) Published
Abstract [en]

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%). 

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Device, Dosimeter, Light, Method, NIF, Performance, Buildings, Civil engineering, Directional response, Image forming, Measurement device, Quality indices, Temperature index, Dosimeters
National Category
Architectural Engineering Building Technologies
Identifiers
urn:nbn:se:hj:diva-35273 (URN)10.1016/j.buildenv.2017.03.002 (DOI)000400226300006 ()2-s2.0-85015064414 (Scopus ID)JTHBebyggdIS (Local ID)JTHBebyggdIS (Archive number)JTHBebyggdIS (OAI)
Available from: 2017-03-29 Created: 2017-03-29 Last updated: 2018-09-17Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7520-1593

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