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Publications (10 of 38) Show all publications
Adamsson, M., Petersson, M. & Aries, M. (2019). A holistic approach for a natural light variation experience: a pilot study of a practical application for office lighting. In: : . Paper presented at CISBAT 2019 – International Scientific Conference 4-6 September 2019, EPFL Lausanne, Switzerland.
Open this publication in new window or tab >>A holistic approach for a natural light variation experience: a pilot study of a practical application for office lighting
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

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.

Keywords
holistic approach, natural light variation, light distribution, dynamic lighting, spectral composition, practical application
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:hj:diva-46471 (URN)
Conference
CISBAT 2019 – International Scientific Conference 4-6 September 2019, EPFL Lausanne, Switzerland
Available from: 2019-10-04 Created: 2019-10-04 Last updated: 2019-10-04Bibliographically approved
Soheilian, M., Hafezparast Moadab, N., Fischl, G. & Aries, M. (2019). Comparison of simulated energy consumption by smart and conventional lighting systems in a residential setting. In: : . Paper presented at CISBAT 2019 – International Scientific Conference 4-6 September 2019, EPFL Lausanne, Switzerland.
Open this publication in new window or tab >>Comparison of simulated energy consumption by smart and conventional lighting systems in a residential setting
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper investigated and compared how the energy consumption of a conventional and Smart Lighting System (SLS) in a simulated residential setting is affected by different households’ arrangements and occupancy pattern. An agent-based simulation model of a one-bedroom apartment in Sweden was chosen for comparison with different scenarios. The result shows that the number of residents within an apartment does not necessarily lead to higher energy consumption. Further findings indicate that, even though it has standby energy consumption, SLS is more energy efficient compared to the conventional lighting system. Additionally, energy consumption during weekends was considerably higher than during weekdays.

Keywords
Intelligent Lighting, residential environment, efficient lighting
National Category
Infrastructure Engineering
Identifiers
urn:nbn:se:hj:diva-46143 (URN)
Conference
CISBAT 2019 – International Scientific Conference 4-6 September 2019, EPFL Lausanne, Switzerland
Available from: 2019-09-16 Created: 2019-09-16 Last updated: 2019-09-16Bibliographically approved
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
Davoodi, A., Johansson, P. & Aries, M. (2019). The use of lighting simulation in the evidence-based design process: A case study approach using visual comfort analysis in offices. Building Simulation
Open this publication in new window or tab >>The use of lighting simulation in the evidence-based design process: A case study approach using visual comfort analysis in offices
2019 (English)In: Building Simulation, ISSN 1996-3599, E-ISSN 1996-8744Article in journal (Refereed) Epub ahead of print
Abstract [en]

The EBD-SIM (evidence-based design, simulation) framework is a conceptual framework developed to integrate the use of lighting simulation in the EBD process to provide a holistic performance evaluation method. A real-time case study, executed in a fully operational office building, is used to demonstrate the framework’s performance. The case study focused on visual comfort analysis. The objective is to demonstrate the applicability of the developed EBD-SIM framework using correlations between current visual comfort metrics and actual human perception as evaluation criteria. The data were collected via simulation for visual comfort analysis and via questionnaires for instantaneous and annual visual comfort perception. The study showed that for user perception, the most crucial factor for visual comfort is the amount of light on a task area, and simple metrics such as Eh-room and Eh-task had a higher correlation with perceived visual comfort than complex performance metrics such as Daylight Autonomy (DA). To improve the design process, the study suggests that, among other things, post-occupancy evaluations (POEs) should be conducted more frequently to obtain better insight into user perception of daylight and subsequently use new evidence to further improve the design of the EBD-SIM model.

Keywords
building performance simulation, lighting simulation, lighting quality, visual comfort, office field study, evidence-based design
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-46419 (URN)10.1007/s12273-019-0578-5 (DOI)
Available from: 2019-10-02 Created: 2019-10-02 Last updated: 2019-10-02
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
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ORCID iD: ORCID iD iconorcid.org/0000-0001-7520-1593

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