Results 21 to 30 of about 1,032,352 (300)

Opportunities of energy saving in lighting systems for public buildings

open access: yesRenewable 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   +2 more
doaj   +1 more source

A modular and interactive OLED-based lighting system [PDF]

open access: yes, 2017
The concept of a flexible, large-area, organic light emitting diode (OLED)-based lighting system with a modular structure and built-in intelligent light management is introduced.
Baric, Adrijan   +5 more
core   +1 more source

Evaluation of lighting conditions in portable classrooms and analysis for alternative daylighting systems [PDF]

open access: yes, 2017
Lighting conditions in multiple classrooms in central Texas were assessed, and the feasibility of improving portable classroom daylighting via alternative daylighting systems was also evaluated.
Zhang, Yan, M.S. in Engineering
core   +1 more source

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

open access: yesIEEE 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   +9 more
doaj   +1 more source

The “Light of Light Beyond Light” [PDF]

open access: yesJournal for Continental Philosophy of Religion, 2019
Abstract Despite Jürgen Habermas’ famous suggestion that the violence of history might be mitigated by “the liquidation of unconditional claims,” the issue of whether monotheistic religions and the metaphysical rationality they engender are indeed the hidden source of such violence remains an open one.
openaire   +1 more source

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

open access: yesAIP 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   +8 more
doaj   +1 more source

High visibility reflective sign sheeting materials: field and computational evaluations of visual performance

open access: yesTransport, 2018
Highway signs provide important information to drivers to assist in navigation, to identify potentially hazardous roadway locations, and to remind drivers of safe operating practices.
John D. Bullough, Nicholas P. Skinner
doaj   +1 more source

The Optical Properties of InGaN/GaN Nanorods Fabricated on (-201) β-Ga2O3 Substrate for Vertical Light Emitting Diodes

open access: yesPhotonics, 2021
We fabricated InGaN/GaN nanorod light emitting diode (LED) on (-201) β-Ga2O3 substrate via the SiO2 nanosphere lithography and dry-etching techniques. The InGaN/GaN nanorod LED grown on β-Ga2O3 can effectively suppress quantum confined Stark effect (QCSE)
Jie Zhao   +5 more
doaj   +1 more source

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

open access: yesVehicles, 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   +5 more
doaj   +1 more source

Solar PV Lighting and Studying after Sunset: Analysis of Micro-benefits in Off-grid Rural Ghana [PDF]

open access: yes, 2013
Solar PV light provides school children living in off-grid rural communities the opportunity to have clean and bright lighting to study after sunset. On the contrary, lighting provided from poor sources can pollute and adversely affect human eyes during ...
George Y. , Obeng
core   +3 more sources

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