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Author Pan, W.; Du, J.
Title Impacts of urban morphological characteristics on nocturnal outdoor lighting environment in cities: An empirical investigation in Shenzhen Type Journal Article
Year 2021 Publication Building and Environment Abbreviated Journal Building and Environment
Volume in press Issue Pages
Keywords Lighting; Planning; Energy
Abstract Lighting is a vital environmental element that affects people's outdoor activities and the creation of liveable neighbourhoods in cities. The use of appropriate lighting at night in public spaces can benefit people's social well-being. This research examined the effects of urban morphological characteristics on outdoor night-time lighting behaviours by analysing 11 urban neighbourhoods that reflect the variety of the prevailing urban morphological patterns in the city centres of Shenzhen. A set of urban morphological descriptors were analysed and two lighting parameters were evaluated by on-site measurement. The results revealed that the low-density high-rise modern neighbourhoods presented very high outdoor illuminance levels, but extremely low occupant use at night, and consequently, remain significant potential of light pollution and energy waste. By contrast, urban villages with high-density mid-rise patterns possess limited outdoor lighting facilities but exhibited very high nocturnal neighbourhood vitality. This type of neighbourhood presents a “demand-oriented and energy-saving” lighting behaviour during the night-time through the use of light spill from the nearby indoor light sources. Multivariable linear regression indicated that morphological characteristics significantly contribute to the illumination distribution within urban spaces. Together, building coverage ratio, floor area ratio, tree coverage ratio and ground surface albedo explain 88% of the variability of night-time site illuminance uniformity. With adding the dimension of urban morphology, this research tries to extend the scope of urban nocturnal lighting studies and provides insights into the setting of more specific criteria for urban design, so as to contribute to healthy city initiatives.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0360-1323 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial (down) 3290
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Author Huang, G.; Huang, Y.; Liu, Z.; Wei, J.; Zhu, Q.; Jiang, G.; Jin, X.; Li, Q.; Li, F.
Title White light-emitting diodes based on quaternary Ag–In-Ga-S quantum dots and their influences on melatonin suppression index Type Journal Article
Year 2021 Publication Journal of Luminescence Abbreviated Journal Journal of Luminescence
Volume 233 Issue Pages 117903
Keywords Lighting technology
Abstract Light sources have effect on the circadian rhythms so as to the health of human. Therefore, both visual and non-visual effects should be considered when designing and fabricating light sources. Quantum dot (QD) materials have been extensively used as color converters to fabricate white light-emitting diodes (LEDs). However, most of the work on the photoluminescent QD-based LEDs (QLEDs) are focused on the improvement of visual performances. Here, quaternary Ag–In-Ga-S (AIGS)/ZnS QDs are synthesized for the application of white QLEDs taking both visual and non-visual performances into consideration. Theoretical calculation is carried out and the results show that QLEDs based on the combination of red emission QDs and green emission ones can exhibit a high color rendering index (CRI) of 90.8 and a color correlated temperature (CCT) of 5669 K, a melatonin suppression index (MSI) of 0.788. Furthermore, the combination of red 670 nm emission and green 550 nm AIGS/ZnS QDs are integrated with a blue-emission chip to fabricate QLEDs. The as fabricated devices exhibit a maximum CRI of 90.33, a CCT of 5947 K and an MSI of 0.7866, which are all consistent with the simulation results. These experimental results are comparable to those of some commercial white light sources. We discuss non-visual effects of QLEDs for the first time, and our research results show that AIGS/ZnS QDs, which are free-of heavy metal elements and have wide full-width of half maximums (FWHMs), are suitable for the fabrication white light sources with highly visual performances and tunable MSI values, which have many potential applications in the field of healthy lighting and environmentally friendly light sources.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-2313 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial (down) 3289
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Author Youssef, M.
Title Role Of Artificial Lighting In Emphasizing The Entrance Approaches Type Journal Article
Year 2020 Publication Architecture and Planning Journal Abbreviated Journal APJ
Volume 26 Issue 2 Pages
Keywords Lighting; Architecture
Abstract Building's entrance is metaphorically a threshold between two realms, the first is an outdoor exposed to climatic change, hazards, and environmental factors, while the second is controlled, monitored, and determined to certain functions. It plays an important role in enriching users' experience. Moreover, it is the first impression a visitor takes to evaluate a whole building. Architecturally, the entrance is a very special part in the elevation, distinguished and emphasized by different design approaches. One of these approaches is using lighting. There is a direct connection between recognition of a space and light assimilation in it. From sunset to dawn, the artificial lighting plays a role in drawing attention to texture, colours, and forms of external elevations, which supports architecture to achieve its purpose. This paper sheds the light on the problem of architects' failure to manage an entrance perception due to insufficient light integration, over illumination, or weak transition from space to another. Many architects consider the entrance as a challenging task, because they believe that it has a direct impact on visitors' perception. This paper, therefore, aims to propose design methods to emphasize the entrance of buildings at night through using the proper artificial lighting. To achieve this aim, the paper used a scientific methodology, based on tracing literature review about design of entrances, investigating ideas of entrances' emphasis, and then analysing four case studies trying to identify the different design approaches of their entrances and how the location, direction, and intensity of illumination became a part of their nocturnal architectural elevation. As a conclusion, techniques of lighting entrances contribute in perceiving architecture’s true purpose and raise the aesthetic dimension of the building at night.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2079-4096 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number UP @ altintas1 @ Serial (down) 3280
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Author Yusup, G. S. B.; Melda, R. J.; Maman, I.; Li, J.
Title Sustainable Low Carbon Urban Lighting Analysis: A Case Study of Bandung City Type Journal Article
Year 2020 Publication Journal of Engineering Sciences Abbreviated Journal
Volume 7 Issue 1 Pages H9-H18
Keywords Energy; Lighting
Abstract Nowadays, lighting technology is in the transition period from conventional lighting to LED, which more environmentally friendly due to free of harmful substances such as mercury, lead, or other hazardous chemicals and gases. This low light pollution because directional light is carefully distributed precisely to the intended location. Performance of the lights also brighter than other lights. This research measuring the reduction of CO2 gas emissions before and after PJU (street lights) in Bandung is changed from the conventional to the LED, also mapping the CO2 gas emissions in six Development Areas (SWK). The basis for this research approach is a case study with before and after comparison, meaning that this approach only applies to one object that is the same as comparing the condition of the object before and after the treatment. In this study, the evaluation research method used is a causal method, which is a method that is more directed at impact evaluation research. Scientifically and objectively, PJU LED provides low CO2 emissions gas by up to 26 % in Bandung city.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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Area Expedition Conference
Notes Approved no
Call Number UP @ altintas1 @ Serial (down) 3276
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Author Gagliardi, G.; Lupia, M.; Cario, G.; Tedesco, F.; Cicchello Gaccio, F.; Lo Scudo, F.; Casavola, A.
Title Advanced Adaptive Street Lighting Systems for Smart Cities Type Journal Article
Year 2020 Publication Smart Cities Abbreviated Journal Smart Cities
Volume 3 Issue 4 Pages 1495-1512
Keywords Lighting; Energy
Abstract This paper reports the results of a recently concluded R&D project, SCALS (Smart Cities Adaptive Lighting System), which aimed at the development of all hardware/software components of an adaptive urban smart lighting architecture allowing municipalities to manage and control public street lighting lamps. The system is capable to autonomously adjust street lamps’ brightness on the basis of the presence of vehicles (busses/trucks, cars, motorcycles and bikes) and/or pedestrians in specific areas or segments of the streets/roads of interest to reduce the energy consumption. The main contribution of this work is to design a low cost smart lighting system and, at same time, to define an IoT infrastructure where each lighting pole is an element of a network that can increase their amplitude. More generally, the proposed smart infrastructure can be viewed as the basis of a wider technological architecture aimed at offering value-added services for sustainable cities. The smart architecture combines various sub-systems (local controllers, motion sensors, video-cameras, weather sensors) and electronic devices, each of them in charge of performing specific operations: remote street segments lamp management, single street lamp brightness control, video processing for vehicles motion detection and classification, wireless and wired data exchanges, power consumptions analysis and traffic evaluation. Two pilot sites have been built up in the project where the smart architecture has been tested and validated in real scenarios. Experimental results show that energy savings of up to 80% are possible compared to a traditional street lamp system.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2624-6511 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial (down) 3274
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