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Author Cho, H.M.; Lee, M.K.; Chang, S.J.; Kim, S.
Title (up) Analysis on Luminance of Outdoor Signboards of Commercial Areas in Seoul at Night Considering Light Pollution Type Journal Article
Year 2015 Publication Journal of The Korean Society of Living Environment System Abbreviated Journal J. Korean Soc. Living Environ. Sys
Volume 22 Issue 4 Pages 583-595-589
Keywords Lighting; Light pollution; Commercial areas; Night-time lighting; Outdoor Signboards; Luminance; outdoor lighting; artificial light at night; signs; LED signs; LED billboards
Abstract As the city is commercialized, the number of stores is increased and it also makes outdoor billboards’ number increased accordingly. And signboards on the street make pedestrians unpleasant, making light pollution by light reflection. In this study, we measured the luminance to target the outdoor signboards of commercial area in Seoul. On the basis of the obtained results, the External system showed high luminance values, and the luminance values of Letter-type system were lower. Furthermore, the measured value at the midnight time was higher, and we considered that the more floating population bring about the high luminance value of the External system. The signboards of External system should be avoided, the Letter-type system should be recommended.
Address School of Architecture, Soongsil University, Seoul, Korea; skim(at)ssu.ac.kr
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Call Number IDA @ john @ Serial 1319
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Author Li, X.; Duarte, F.; Ratti, C.
Title (up) Analyzing the obstruction effects of obstacles on light pollution caused by street lighting system in Cambridge, Massachusetts Type Journal Article
Year 2019 Publication Environment and Planning B: Urban Analytics and City Science Abbreviated Journal Environment and Planning B: Urban Analytics and City Science
Volume in press Issue Pages 2399808319861645
Keywords Skyglow; Lighting; upward light
Abstract Artificial light has transformed urban life, enhancing visibility, aesthetics, and increasing safety in public areas. However, too much unwanted artificial light leads to light pollution, which has a negative effect on public health and urban ecosystems, as well as on the aesthetic and cultural meanings of the night sky. Some of the factors interfering with the estimation of light pollution in cities are urban features, such as the presence of trees, road dimensions, and the physical characteristics of buildings. In this study, we proposed a simplified model for unwanted upward light coming from street luminaires based on a building height model and the publicly accessible Google Street View images. We simulated and analyzed the obstruction effects of different street features on the light pollution caused by the street lighting system in Cambridge, Massachusetts. By providing quantitative information about the connections between the streetscape features and the amount of unwanted upward artificial light, this study provides reference values to inform policies aimed at curbing light pollution.
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ISSN 2399-8083 ISBN Medium
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Call Number GFZ @ kyba @ Serial 2587
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Author Gibbons, R.; Terry, T.; Bhagavathula, R.; Meyer, J.; Lewis, A.
Title (up) Applicability of mesopic factors to the driving task Type Journal Article
Year 2015 Publication Lighting Research and Technology Abbreviated Journal Lighting Research and Technology
Volume 48 Issue 1 Pages 70-82
Keywords Lighting; Public Safety; Planning
Abstract With the advent of light-emitting diode technology being applied to roadway lighting, the spectral power distribution of the light source is becoming much more important. In this experiment, the detection of pedestrians at five adaptation levels under three light sources, high pressure sodium and light emitting diodes of two colour temperatures was measured in realistic roadway scenarios. The results show that while the light source type was not significant, an increase in adaptation luminance increased the detection distance. As the offset of the object to the roadway increased, some spectral effects became more significant; however, this effect was not consistent across all angles of eccentricity. The conclusions from this work indicate that mesopic factors may not be applicable on high-speed roads.
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ISSN 1477-1535 ISBN Medium
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Notes Approved no
Call Number LoNNe @ kyba @ Serial 1382
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Author Farkas, T.D.; Kiràly, T.; Pardy, T.; Rang, T.; Rang, G.
Title (up) Application of power line communication technology in street lighting control Type Journal Article
Year 2018 Publication International Journal of Design & Nature and Ecodynamics Abbreviated Journal Int. J. DNE
Volume 13 Issue 2 Pages 176-186
Keywords Lighting
Abstract Rapidly increasing usage of telecommunication systems causes new transmission technologies and networks to emerge. Not only the efficiency, reliability and accessibility of the network are important, but also the economic issues. One cost-effective solution could be power line communication (PLC) technology, which transmits data using the existing electricity infrastructure. The application of this communication technique is an attractive and innovative solution for the realization of smart cities and smart homes. With intelligent control networks, energy savings can be optimized and the operating as well as maintenance costs can be reduced. Since outdoor lighting systems are the major consumers of electricity, to create a modern, energy-efficient city, intelligent street lighting control is needed. This paper provides an overview of power line communication principles including the theoretical background of data communication, modulation techniques, channel access methods, protocols, disturbances and noises. Furthermore, in order to highlight the benefits of a PLC-based street lighting control system, a pilot project will be presented.
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ISSN 1755-7437 ISBN Medium
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Notes Approved no
Call Number NC @ ehyde3 @ Serial 2091
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Author Dick, R.
Title (up) Applied scotobiology in luminaire design Type Journal Article
Year 2014 Publication Lighting Research and Technology Abbreviated Journal Lighting Research and Technology
Volume 46 Issue 1 Pages 50-66
Keywords Lighting
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ISSN 1477-1535 ISBN Medium
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Call Number LoNNe @ schroer @ Serial 576
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