Results 41 to 50 of about 302,126 (362)

Energy-efficient street lighting through embedded adaptive intelligence [PDF]

, 2013
Streetlights place a heavy demand on electricity usage, providing significant financial and environmental burdens. Consequently, initiatives to reduce energy consumption have been proposed, usually by turning off or dimming the streetlight. In this paper,
Geoff V. Merrett, Merrett, Geoff V., Sei Ping Lau, Neil M. White, White, Neil M., Lau, Sei Ping   +5 more
core   +1 more source

Energy savings in greenhouses by transition from high-pressure sodium to LED lighting

, 2021
Greenhouses in high latitudes consume vast amounts of energy for heating and supplemental lighting. Light emitting diodes (LEDs) have been suggested as having great potential for reducing greenhouse energy use, as they are extremely efficient at ...
David Katzin, L. Marcelis, S. van Mourik
semanticscholar   +1 more source

Opportunities of energy saving in lighting systems for public buildings

Renewable Energy and Sustainable Development, 2017
The lighting system provides many options for cost-effective energy saving with low or no inconvenience. Lighting improvements are excellent investments in most public buildings, it is usually cost-effective to address because lighting improvements are ...
Ayman Abd El-khalek, Kamelia Youssef, Ibrahim Yassin   +2 more
doaj   +1 more source

Simulation of virtual natural lighting solutions with a simplified view [PDF]

, 2014
Daylight is limited in time and space. In situations where daylight is insufficiently available, virtual natural lighting solutions (VNLS), which are systems that artificially provide lighting and view comparable to those of real windows and skylights ...
Mangkuto, R. A.,, Loenen, E. V.,, Hensen, J.L.M., Mangkuto, RA Rizki, Loenen, EJ Evert van, Mangkuto, R.A., Hensen, J.,, Loenen, van, E.J., Aries, Myriam,, Aries, MBC Myriam, Aries, M.B.C., Hensen, JLM Jan   +11 more
core   +1 more source

Required Visibility Level for Reliable Object Detection during Nighttime Road Traffic in Non-Urban Areas

Applied Sciences, 2023
Motor vehicle headlamps are the only light sources that create visibility conditions for the driver in nighttime non-urban traffic. Therefore, a suitable design of these lighting systems is of the highest relevance to allow the driver an early detection ...
Anil Erkan, David Hoffmann, Nikolai Kreß, Tsoni Vitkov, Korbinian Kunst, Markus Alexander Peier, Tran Quoc Khanh   +6 more
doaj   +1 more source

Determination of Speed-Dependent Roadway Luminance for an Adequate Feeling of Safety at Nighttime Driving

Vehicles, 2021
The purpose of this work is to determine as a function of velocity the minimal roadway luminance that is required to be judged as being bright enough for a driver to perform a nighttime driving task with an adequate feeling of safety. In this context, it
Anil Erkan, Sebastian Babilon, David Hoffmann, Timo Singer, Tsoni Vitkov, Tran Quoc Khanh   +5 more
doaj   +1 more source

Energy-neutral solar-powered street lighting with predictive and adaptive behaviour [PDF]

, 2014
Street lighting can enhance the safety and security of residential and commercial areas. However, its installation and operation is expensive: cables must be installed, and power is drawn from the grid which is typically dominated by non-renewable ...
Geoff V. Merrett, Weddell, Alex S., Merrett, Geoff V., Sei Ping Lau, Neil M. White, Alex S. Weddell, Lau, Sei Ping, White, NM   +7 more
core   +1 more source

A Transmission-Type Testing System for Measuring Optical Characteristics of Phosphors for Remote-Phosphor-Based White LEDs

IEEE Photonics Journal, 2016
In this paper, we have proposed a transmission-type testing system for determining optical characteristics of remote-phosphor plates in white light-emitting diodes (WLEDs).
Sijia Dang, Ziquan Guo, Weilin Huang, Yulin Gao, Yijun Lu, Yue Lin, Tienmo Shih, Lihong Zhu, Hongli Lu, Zhong Chen   +9 more
doaj   +1 more source

Investigations about Al and Cu-Based Planar Spiral Inductors on Sapphire for GaN-Based RF Applications

Applied Sciences, 2021
Conventionally, Cu is preferred over Al to fabricate integrated inductors with higher quality factors on either silicon or sapphire substrates, profiting from its lower resistivity.
Chen Lin, Teng Zhan, Junxi Wang, Jinmin Li, Zhiqiang Liu, Xiaoyan Yi   +5 more
doaj   +1 more source

Overshoot effects of electron on efficiency droop in InGaN/GaN MQW light-emitting diodes

AIP Advances, 2016
To evaluate electron leakage in InGaN/GaN multiple quantum well (MQW) light emitting diodes (LEDs), analytic models of ballistic and quasi-ballistic transport are developed.
Yang Huang, Zhiqiang Liu, Xiaoyan Yi, Yao Guo, Shaoteng Wu, Guodong Yuan, JunXi Wang, Guohong Wang, Jinmin Li   +8 more
doaj   +1 more source