Results 51 to 60 of about 32,103 (202)

Optimization of Energy Efficiency in Photovoltaic Water Pumping Systems Using Neural Networks

open access: yesEnergy Science &Engineering, EarlyView.
This study investigates an optimal control strategy for a photovoltaic (PV) water pumping system aimed at improving efficiency and autonomy in off‐grid applications. The system uses an induction motor with direct torque control and compares three maximum power point tracking (MPPT) techniques: neural network–based MPPT, Incremental Conductance (IC ...
Sihem Ghoudelbourk   +3 more
wiley   +1 more source

Estimation of hourly average illuminance under clear sky conditions in Chongqing.

open access: yesPLoS ONE, 2020
Satellite-based methods are proposed for the estimation of clear day average hourly illuminance from satellite data under local climate conditions.
Ying He, Xinshuo Zhang, Li Quan
doaj   +1 more source

How do elderly pedestrians perceive hazards in the street? - An initial investigation towards development of a pedestrian simulation that incorporates reaction of various pedestrians to environments [PDF]

open access: yes, 2007
In order to evaluate the accessibility of street and transport environments, such as railway stations, we are now developing a pedestrian simulation that incorporates elderly and disable pedestrians and their interaction with various environments ...
Boampong, D   +3 more
core  

Transparent White OLED‐Based Brain Stimulation With Invisible Flicker and Photobiological Safety Evaluation

open access: yesJournal of the Society for Information Display, EarlyView.
A safe, transparent, invisible flickering transparent white OLED (TrWOLED) platform is developed for therapeutic 40 Hz brain stimulation. By utilizing chromatic modulation, this device delivers effective gamma frequency brain entrainment while eliminating visual fatigue.
Younghun Jung   +2 more
wiley   +1 more source

Exploring the Influence of the Illumination and Painting Tone of Art Galleries on Visual Comfort

open access: yesPhotonics, 2022
Because of the increase in green lighting in recent years, scholars have been trying to find more comfortable lighting methods in various fields to meet people’s lighting needs. In previous studies, we found that most museum lighting was conducted in the
Yue Feng   +4 more
doaj   +1 more source

Microwave Quantum Illumination

open access: yesPhysical Review Letters, 2015
Main Letter.
S. Barzanjeh   +5 more
openaire   +6 more sources

Carbon Stock and Environmental Variations of Typical Plantations in Mufu Mountain in Hubei Province, China

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT Forest ecosystems play a critical role in the global carbon cycle. As a significant terrestrial carbon sink, plantations exhibit carbon stock patterns that are shaped by tree species composition, stand structure, and environmental conditions. Here, we investigated typical plantation types in the Mufu Mountain, Hubei Province.
Mingyang Ding   +5 more
wiley   +1 more source

The Ecology of Human Sleep (EcoSleep) Cohort Study: Protocol for a longitudinal repeated measurement burst design study to assess the relationship between sleep determinants and outcomes under real‐world conditions across time of year

open access: yesJournal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary The interplay of daily life factors, including mood, physical activity, or light exposure, influences sleep architecture and quality. Laboratory‐based studies often isolate these determinants to establish causality, thereby sacrificing ecological validity.
Anna M. Biller   +8 more
wiley   +1 more source

Investigating the Combined Effect of Artificial Light at Night and Noise on Sleep Quality of High School Students

open access: yesJournal of Sleep Research, EarlyView.
Adolescents today are heavily exposed to ALAN from different sources, including cellular phones, personal computers, tablets, as well as other indoor and outdoor light sources, which affects the quality of their sleep. ABSTRACT Adolescents frequently use smartphones, smartwatches, personal computers, tablets, and other electronic devices during the day
Hassan Shama   +2 more
wiley   +1 more source

Low-cost extra-low voltage LED dimmer for tuneable white lighting [PDF]

open access: yes, 2019
The colour appearance of light sources has a major impact on how people perceive space. With LED illumination lighting, the colour output can be tuned to virtually any perceivable colour, including any hue of white light. It has been established that the
Hrbáč, Roman   +3 more
core   +1 more source

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