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Author Lee, J.; Le, L.-T.; Le, H.-T.; Liao, H.-Y.; Huang, G.-Z.; Ma, H.-Y.; Wen, C.-C.; Fang, Y.C.; Chen, C.-H.; Chang, S.-H.; Lee, H.-Y.
Title Low-Glare Freeform-Surfaced Street Light Luminaire Optimization to Meet Enhanced Road Lighting Standards Type Journal Article
Year (down) 2020 Publication International Journal of Optics Abbreviated Journal International Journal of Optics
Volume 2020 Issue Pages 1-12
Keywords Lighting
Abstract To enhance driving safety at night, a new freeform-surface street light luminaire was proposed and evaluated in this study that meets the requirements of the International Commission on Illumination (CIE) M3 class standard for road lighting. The luminaire was designed using simulations to optimize the location of the bulb according to the requirements of the standard. The light source IES file was experimentally obtained for the optimized luminaire prototype with a 150 W ceramic metal halide lamp using an imaging goniophotometer. The trial road lighting simulation results computed by the lighting software DIALux indicated that the proposed luminaire provided an average road surface brightness of 1.1 cd/m2 (compared to a minimum requirement of 1.0 cd/m2), a brightness uniformity of 0.41 (compared to a minimum requirement of 0.4), a longitudinal brightness uniformity of 0.64 (compared to a minimum requirement of 0.6), and a glare factor of 7.6% (compared to a maximum limit of 15%). The findings of the image goniophotometer tests were then confirmed by the results of a certified mirror goniophotometer test conducted by the Taiwan Accreditation Foundation (TAF). The results of this study can be used to provide improved street lighting designs to meet enhanced international standards.
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ISSN 1687-9384 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3103
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Author Spur, M.; Houel, N.; Tourre, V.
Title Visualizing Multilayered Geospatial Data In Virtual Reality To Assess Public Lighting Type Journal Article
Year (down) 2020 Publication ISPRS – International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Abbreviated Journal Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.
Volume Xliii-B4-2020 Issue Pages 623-630
Keywords Lighting; Instrumentation; Vision
Abstract With the improvement and proliferation of virtual reality devices, their use for research and professional activity is broadening,fostering the advent of the field of immersive analytics, as is their acceptance among consumers. Other than the heightened sense of immersion into visualized data they provide, they also make displays of much larger apparent size and different positioning practical than what would be possible otherwise. Drawing on these benefits, we implemented a development of Multiple and Coordinated Displays (MCVs) for geovisualization that stacks different layers of data above each other, tilted for legibility. In a formal experiment, we evaluated it and two other, comparable MCV methods implemented in VR for their usefulness in analyzing public perception and soliciting public feedback regarding urban street lighting. In that field, the direction has recently been shifting from purely systemic development to a participatory approach, thus our investigation was into how a system like this could facilitate participation that can yield actionable results. Previous analysis of interaction data and usability questionnaires reveals preferences for certain systems depending on user characteristics, with the stack system showing a slight advantage over a grid of layers and especially over temporal multiplexing. We show that regardless of MCV variation, participants were able to analyze and provide feedback on public lighting situations that can directly contribute to urbanist work. The MCV approach further aided in understanding their choices, as eye-tracking allowed us to analyze attention to individual data layers.
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ISSN 2194-9034 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3105
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Author Kyba C.C.M., Ruby A., Kuechly H.U., Kinzey B., Miller N., Sanders J., Barentine J., Kleinodt R., Espey B.
Title Direct measurement of the contribution of street lighting to satellite observations of nighttime light emissions from urban areas Type Journal Article
Year (down) 2020 Publication Lighting Research & Technology Abbreviated Journal
Volume in press Issue Pages
Keywords Remote Sensing; Lighting; Energy
Abstract Nighttime light emissions are increasing in most countries worldwide, but which types of lighting are responsible for the increase remains unknown. Also unknown is what fraction of outdoor light emissions and associated energy use are due to public light sources (i.e. streetlights) or various types of private light sources (e.g. advertising). Here we show that it is possible to measure the contribution of street lighting to nighttime satellite imagery using ‘smart city’ lighting infrastructure. The city of Tucson, USA, intentionally altered its streetlight output over 10 days, and we examined the change in emissions observed by satellite. We find that streetlights operated by the city are responsible for only 13% of the total radiance (in the 500–900 nm band) observed from Tucson from space after midnight (95% confidence interval 10–16%). If Tucson did not dim their streetlights after midnight, the contribution would be 18% (95% confidence interval 15–23%). When streetlights operated by other actors are included, the best estimates rise to 16% and 21%, respectively. Existing energy and lighting policy related to the sustainability of outdoor light use has mainly focused on street lighting. These results suggest an urgent need for consideration of other types of light sources in outdoor lighting policy.
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Call Number GFZ @ kyba @ Serial 3185
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Author Ogoro M.; Ernest S. J.; Chukwudi D. O.
Title Spatial Trend Of Light Pollution In Obio/Akpor Lga, Rivers State, Nigeria Type Journal Article
Year (down) 2020 Publication International Journal of Novel Research in Civil Structural and Earth Sciences Abbreviated Journal
Volume 7 Issue 2 Pages
Keywords Lighting; Perception
Abstract The study examines the spatial trend of light pollution across the study area. The Global Positioning System (GPS) was used to acquire the coordinates of each respondent resident, where structured questionnaire were administered in the study area and then imported to the ArcGIS 9.3 software environment to analyse the spatial trend in light pollution using the Inverse Distance Weighted (IDW) method of interpolation. Findings, reveals that the perception of pollution by light stray is obviously noticed by the respondents with particular emphasis on light stray from traffic light, neighbor security lights which to a large extend alters their level of comfort and distort their level of outdoor relaxation. Thus, the study recommends, among others, that: shielded light bulbs or properly designed light fittings should be installed to avoid light rays spreading beyond the needed boundaries. And measure should be taken to ensure car drivers use properly fixed headlamps that are not damaged and also, awareness should be passed on adequate use of headlamps by road users (vehicle drivers) on streets when compared with use on highways and minor roads.
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ISSN 2394-7357 ISBN Medium
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Notes Approved no
Call Number UP @ altintas1 @ Serial 3205
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Author Mehra M.
Title Illuminating Military Installations Type Journal Article
Year (down) 2020 Publication Society of American Military Engineers Abbreviated Journal
Volume 112 Issue 726 Pages 66-68
Keywords Lighting; Planning
Abstract Military bases must implement high security measures to ensure the safety of personnel and visitors. Lighting is a critical aspect of a base-wide security plan. Installations require high-quality, reliable lighting and real-time reporting and diagnostics so energy and security personnel know when and where luminaires are down and why, allowing them to re-establish the security perimeter more quickly. Modern installations are also concerned with conserving energy and reducing maintenance in order to decrease overall operating costs. An energy-efficient lighting system helps minimize the military’s energy footprint and decrease greenhouse gas emissions. There are, however, challenges associated with these efforts. Most bases sprawl across thousands of acres and include a range of applications that require a broad portfolio of luminaires—from roadways and intersections to security checkpoints, substations, motor pools, and office, housing, and medical buildings. They also include a mix of personnel who reside and work on base. Some military personnel and civilians arrive in the morning and leave at night. Others, including soldiers manning security checkpoints, require illumination for tasks performed after dark. In addition, many installations are located near residential areas or wildlife refuges where sky glow and light pollution must be avoided.
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Call Number UP @ altintas1 @ Serial 3207
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