Results 21 to 30 of about 205,694 (360)

Photo-sensitive Structures with Cascade Radiation Concentrators Based on Colloidal Quantum Dots of Metal Chalcogenides

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2023
Introduction. The problem of increasing the efficiency of existing photodetectors and creating their new types attracts much research attention. Among new photodetector types are photosensitive structures based on cascade concentrators, whose operational
I. I. Mikhailov   +7 more
doaj   +1 more source

Novel nonimaging solar concentrator for portable solar systems for developing countries [PDF]

open access: yes, 2017
Portable solar chargers have been gaining popularity as a new technology to help increase electrification in rural areas in developing countries. It is a fast developing industry aiming to produce a low-cost solution for the application of off-grid solar
Freier, Daria   +4 more
core   +3 more sources

A New Procedure to Design an Open Circuit Blowing Subsonic Moist-Air Wind Tunnel

open access: yesApplied Sciences, 2023
The present research work shows how a functional subsonic moist-air wind tunnel has been designed. Although this type of wind tunnel has never been developed to date, it is particularly interesting to develop a satisfactory design of feasibility under ...
José A. Orosa   +2 more
doaj   +1 more source

Loss analysis in luminescent sheet concentrators: from ideal to real system

open access: yesEPJ Photovoltaics, 2018
Thermodynamic limits of luminescent sheet concentrators (LSC) are three orders of magnitude higher than record ones made up to now. This paper aims at understanding why there is such a gap and what is the link between ideal and real LSC.
Proise Florian   +3 more
doaj   +1 more source

Improvement of solar cell efficiency by using Two mirrors V-trough concentrator [PDF]

open access: yesEngineering and Technology Journal, 2009
V-trough concentrator with four mirrors has been designed and constructed. Itseffects on the silicon solar cell performance were studied with and with out coolingsystem.
Ali Al-hamadani.
doaj   +1 more source

Baló Concentric Sclerosis

open access: yesJournal of the Belgian Society of Radiology, 2022
Teaching Point: Baló concentric sclerosis is a rare subtype of multiple sclerosis, characterized by a concentric layered mass on magnetic resonance imaging.
Kelly Di Dier, Marc Lemmerling
openaire   +5 more sources

Experimental study of a linear Fresnel reflection solar concentrating system

open access: yesFrontiers in Energy Research, 2023
Introduction: In the field of solar energy utilization, the construction of low cost and easy to process large concentrated photothermal system is a scientific problem to be solved. A linear Fresnel reflection solar concentrator is proposed in this paper.
Qian Zhang   +3 more
doaj   +1 more source

Design of an oxygen concentrator according to ISO 80601-2-69 standards

open access: yesDyna
This work focuses on the design, construction and economic analysis of an oxygen concentrator in the city of Moquegua, Peru, under ISO 80601-2-69 standards.
Vigil Wuilber Mamani-Cori   +2 more
doaj   +1 more source

Flat Optical Fiber Daylighting System with Lateral Displacement Sun-Tracking Mechanism for Indoor Lighting

open access: yesEnergies, 2017
An essential impact which can improve the indoor environment and save on power consumption for artificial lighting is utilization of daylight. Optical fiber daylighting technology offers a way to use direct daylight for remote spaces in a building ...
Ngoc Hai Vu, Seoyong Shin
doaj   +1 more source

Recent trends in concentrated photovoltaics concentrators’ architecture [PDF]

open access: yesJournal of Photonics for Energy, 2014
The field of concentrated photovoltaics (CPV) has met some remarkable advances in recent years. The continuous increase in conversion efficiency of multijunction solar cells and new advancements in optics have led to new demands and opportunities for optical design in CPV.
Buljan, Marina   +3 more
openaire   +3 more sources

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