| Records |
| Author |
Kim, K.-M.; Kim, Y.-W.; Oh, S.-T.; Lim, J.-H. |
| Title |
Development of a natural light reproduction system for maintaining the circadian rhythm |
Type |
Journal Article |
Year  |
2019 |
Publication |
Indoor and Built Environment |
Abbreviated Journal |
Indoor and Built Environment |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Lighting; Human Health |
| Abstract |
Circadian rhythm is linked to sleep, arousal and human health overall, affecting body temperature and heart rate. A 24-h natural-light cycle provides optimum lighting environment for humans. However, as people increasingly stay indoors with artificial lighting, lacking periodic characteristics, imbalance in the circadian rhythm ensues. Previous lighting-related studies to resolve such problem partially provided the colour temperatures of natural light but failed to reproduce the 24-h periodic characteristics of it. This study proposes a natural light-reproducing system that provides the daylight cycle characteristics of natural light in order to maintain the circadian rhythm. Natural light was measured through an optical measurement equipment, while the characteristics (colour temperature and short-wavelength ratio) of natural light by season and time were analysed. Subsequently, the control indicator of seasonal and hourly lighting was extracted and applied to the light-emitting diode lighting to provide lighting service, executing a daylight cycle that reflects the characteristics of natural light. After the sunset, especially, the circadian rhythm was maintained by minimizing the short-wavelength ratio of the lighting while maintaining indoor illumination. |
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| ISSN |
1420-326X |
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| Call Number |
GFZ @ kyba @ |
Serial |
2591 |
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| Author |
Zielinska-Dabkowska, K.M.; Xavia, K. |
| Title |
Global Approaches to Reduce Light Pollution from Media Architecture and Non-Static, Self-Luminous LED Displays for Mixed-Use Urban Developments |
Type |
Journal Article |
| Year |
2019 |
Publication |
Sustainability |
Abbreviated Journal |
Sustainability |
| Volume |
11 |
Issue |
12 |
Pages |
3446 |
| Keywords |
Lighting |
| Abstract |
Urban environments have become significantly brighter and more illuminated, and cities now consider media architecture and non-static, self-luminous LED displays an essential element of their strategy to attract residents, visitors, and tourists in the hours after dark. Unfortunately, most often, they are not designed with care, consideration, and awareness, nor do they support the visual wellbeing and circadian rhythms of humans. They also increase light pollution which has an adverse effect on the environment. The aim of this study was to estimate the scale of the negative impact of 28 non-static, self-luminous LED shop window displays within a real-life city context along the main shopping street Banhofstrasse in Zurich, Switzerland. An experimental field measurement survey investigation was performed to identify visual luminance with commonly available tools such as a luminance meter and a digital reflex camera for luminance photography. Moreover, the most important global approaches to reduce light pollution were evaluated in the form of existing guidelines, technical standards, and laws, all of which should be considered when specifying illuminated digital advertisements. A literature review and survey results both confirmed the extent of the problem and highlighted, too, the need to better measure, apply, and manage this new technology. The authors’ proposal for improvements involve practical recommendations for the design and implementation of future projects which can positively guide and direct this growing trend. |
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| ISSN |
2071-1050 |
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no |
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GFZ @ kyba @ |
Serial |
2601 |
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| Author |
Guanglei, W.; Ngarambe, J.; Kim, G. |
| Title |
A Comparative Study on Current Outdoor Lighting Policies in China and Korea: A Step toward a Sustainable Nighttime Environment |
Type |
Journal Article |
| Year |
2019 |
Publication |
Sustainability |
Abbreviated Journal |
Sustainability |
| Volume |
11 |
Issue |
14 |
Pages |
3989 |
| Keywords |
Lighting; Policy |
| Abstract |
Light pollution is a serious environmental issue with many adverse effects on human health and the ecosystem as a whole. Accordingly, many countries have issued laws and regulations to limit the effects of artificial lighting at night (ALAN). The Republic of Korea and China are among the few countries that have drafted laws to curb light pollution. In the present study, we gathered data related to light pollution regulations and ordinances in both China and Korea. We then carried out a comparative analysis of the light pollution laws of both countries. We found that, although the two countries share a similar socio-economic background, they have different approaches to the issue of light pollution. The information provided in this study serves as a guideline to countries that wish to develop their own light pollution policies. In addition, the conclusions provided in our study offer potential improvements to local and national light pollution policies in both the Republic of Korea and China. |
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2071-1050 |
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no |
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GFZ @ kyba @ |
Serial |
2602 |
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| Author |
Łopuszyńska, A.; Bartyna-Zielińska, M.; Kaźmierczak, B.; Jadwiszczak, P.; Kutyłowska, M.; Miller, U. |
| Title |
Lighting of urban green areas – the case of Grabiszyn Park in Wrocław. Searching for the balance between light and darkness through social and technical issues |
Type |
Journal Article |
| Year |
2019 |
Publication |
E3S Web of Conferences |
Abbreviated Journal |
E3S Web Conf. |
| Volume |
100 |
Issue |
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Pages |
00049 |
| Keywords |
Society; Lighting |
| Abstract |
Illuminating the urban green spaces could lead to conflicts of spatial, technical and social nature. This relatively new, though already global, problem is expected to grow bigger with the further increase of urban areas artificial brightness. The case of Grabiszyn Park in Wrocław is an example of how difficult it is to find a balance between big-city lights and a natural darkness. The situation is even more difficult if the light is not legally recognized as a significant source of air pollution and direct nuisance at the legal level. The aim of the paper is to recognize the broader perspective of urban greenery lighting issues, global recommendations basis and the local awareness. The authors also made an attempt to analyze and assess the project implementation, as well as to characterize the components of the quality of an urban green areas lighting. |
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| ISSN |
2267-1242 |
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no |
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GFZ @ kyba @ |
Serial |
2603 |
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| Author |
Houpt, K.A.; Erb, H.N.; Coria-Avila, G.A. |
| Title |
The Sleep of Shelter Dogs Was Not Disrupted by Overnight Light Rather than Darkness in a Crossover Trial |
Type |
Journal Article |
| Year |
2019 |
Publication |
Animals : an Open Access Journal From MDPI |
Abbreviated Journal |
Animals (Basel) |
| Volume |
9 |
Issue |
10 |
Pages |
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| Keywords |
Animals; dog; influence of light; night-time behavior; shelter; sleep |
| Abstract |
Dogs in shelters may be unattended at night. The purpose of this study is to describe the night-time behavior of dogs in a shelter and to determine if artificial light affected their sleeping patterns. Ten dogs were video-recorded under both light and dark conditions and their behavior recorded using focal animal sampling. The dogs were lying down 649 +/- 40 min (mean +/- SD) in the light condition and 629 +/- 58 min in the dark condition each night. They awoke, stood up, turned around and then lay down again every 48 to 50 min. There was no significant difference in time spent lying between the two conditions (p > 0.05). Light did not seem to affect their behavior. The conclusion is that dogs in shelters may sleep in the absence of people and that light does not disrupt their sleep patterns. |
| Address |
Centro de Investigaciones Cerebrales, Universidad Veracruzana, Xalapa-Enriquez 91090, Mexico. gcoria@uv.mx |
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| Language |
English |
Summary Language |
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Edition |
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| ISSN |
2076-2615 |
ISBN |
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| Notes |
PMID:31615005 |
Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2703 |
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