Results 61 to 70 of about 5,815,790 (304)

Investigation of the Optical Performance of a Novel Planar Static PV Concentrator with Lambertian Rear Reflectors

open access: yesBuildings, 2017
Due to the demands for energy saving and environmental conservation, the development of sustainable zero-carbon buildings has become an inevitable trend.
Xiao Liu   +3 more
doaj   +1 more source

On the optical performance of a spherical stationary reflector/tracking absorber solar collector

open access: yesInternational Journal of Sustainable Energy, 2022
The effect of specific design characteristics of the SRTA collector are discussed, such as the absorber diameter, the absorber length and the optical error from the tracking mechanism.
Rosa Christodoulaki   +2 more
doaj   +1 more source

A Design of High-Efficiency: Vertical Accumulation Modulators Based on Silicon Photonics

open access: yesNanomaterials, 2023
On-chip optical modulators, which are capable of converting electrical signals into optical signals, constitute the foundational components of photonic devices.
Zhipeng Zhou   +15 more
doaj   +1 more source

Numerical simulations of beam propagation through optical turbulence for high-altitude platform crosslinks [PDF]

open access: yes, 2004
In this paper we introduce a simulation method for modelling clear-air atmospheric turbulence effects for long horizontal stratospheric paths. Divergence angles of several hundred microradians in combination with link distances up to 800 km require to ...
Perlot, Nicolas   +3 more
core  

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

open access: yesFEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell   +2 more
wiley   +1 more source

Design optimization of a new cavity receiver for a parabolic trough solar collector

open access: yesGazi Üniversitesi Fen Bilimleri Dergisi
The most important parameter affecting the optical efficiency, the upper limit for an overall efficiency of parabolic trough solar collector (PTC), is the net absorbed heat rate by receiver on which solar beam radiation is concentrated.
Gülden Adıyaman, Levent Çolak
doaj   +1 more source

Design of the Secondary Optical Elements for Concentrated Photovoltaic Units with Fresnel Lenses

open access: yesApplied Sciences, 2015
The goal of this presented study was to determine the optimum parameters of secondary optical elements (SOEs) for concentrated photovoltaic (CPV) units with flat Fresnel lenses. Three types of SOEs are under consideration in the design process, including
Yi-Cheng Chen, Hung-Wei Chiang
doaj   +1 more source

Enhancement of optical absorption in Ga-chalcopirite-based intermediate-band materials for high efficiency solar cells [PDF]

open access: yes, 2010
We present absorption properties enhancement for two CuGaS2-based intermediate-band materials, as promising compounds for high efficiency, lower-cost photovoltaic devices.
P. Wahnón   +5 more
core   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Parametric Optimization and Performance Analysis of a Central Receiver Solar Power Plant: A Numerical Study for Enhanced Solar Field and Receiver [PDF]

open access: yesBIO Web of Conferences
In the context of the energy transition and the search for sustainable solutions, central receiver solar power plants have become a promising technology for generating green electricity.
Bouaiche Khalid   +3 more
doaj   +1 more source

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