Results 91 to 100 of about 655,925 (308)
Energies, 2022 It is well established that renewable energy resources for electricity generation are free. In hot areas, solar energy has become one of the major interests of researchers and specialists. This paper aims to experimentally investigate the maximum voltage
Mohammed A. Qasim +2 more
doaj +1 more source
Advanced Science, EarlyView.A heterostructured CeZrOx/NiO‐Ni inverse catalyst is designed for highly efficient photothermal CO2 methanation under low‐intensity light without auxiliary heating. It achieves 464 mmol·gcat−1·h−1 methane space‐time yield under natural concentrated sunlight, maintains stability over light‐dark cycles and extended air storage, and is scalable to 100 g ...
Chuqiao Song +16 more
wiley +1 more source
Fresnel phase plates as reconfigurable microfluidic lenses [PDF]
, 2004 Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references (leaf 49).In this study, Fresnel phase plates were tested as reconfigurable lenses. The lenses were constructed from a Fresnel
Tsikata, Sedina, 1981-
core
Nature Communications, 2022 X-ray diffractive and refractive optical elements suffer from chromatic aberrations, limiting high-resolution X-ray microscopes mainly to bright synchrotron sources.
Adam Kubec +5 more
doaj +1 more source
Application-based design of the Fresnel lens solar concentrator
Renewables: Wind, Water, and Solar, 2019 A novel genetically themed hierarchical algorithm (GTHA) has been investigated to design Fresnel lens solar concentrators that match with the distinct energy input and spatial geometry of various thermal applications. Basic heat transfer analysis of each
Hassan Qandil +2 more
semanticscholar +1 more source
Broadband Achromatic Programmable Electromagnetic Camouflage via Fluidic‐Accessible Metasurface
Advanced Science, EarlyView.A fluidic access metasurface enables dynamic, broadband electromagnetic illusions. By physically reconstructing conductive patterns with liquid metal, the metasurface achieves real‐time, pixel‐level control over phase dispersion. This allows for the programmable generation of arbitrary strong scattering point arrays, effectively deceiving high ...
Shipeng Liu +14 more
wiley +1 more source
Diffraction Analysis of 2-D Pupil Mapping for High-Contrast Imaging
, 2005 Pupil-mapping is a technique whereby a uniformly-illuminated input pupil, such as from starlight, can be mapped into a non-uniformly illuminated exit pupil, such that the image formed from this pupil will have suppressed sidelobes, many orders of ...
Carney P. S. +3 more
core +1 more source
Results in OpticsPassive Infrared (PIR) motion sensors are integral to modern residential and commercial security systems, valued for their reliability, cost-effectiveness, and ability to detect motion through infrared radiation.
Vo Quang Sang +2 more
doaj +1 more source
Pancake Lenses through Curved Lamination for Compact Virtual Reality
Advanced Intelligent Systems, EarlyView.This article presents an ultrathin VR optical system based on a 1.35 in. microdisplay, leveraging curved lamination technology. Compared to mainstream solutions, the proposed design demonstrates superior compactness (volume compression by 12%) and enhanced optical performance.
Jiaping Sun +5 more
wiley +1 more source
Automated Fresnel lens tester system [PDF]
, 1981 An automated data collection system controlled by a desktop computer has been developed for testing Fresnel concentrators (lenses) intended for solar energy applications. The system maps the two-dimensional irradiance pattern (image) formed in a plane parallel to the lens, whereas the lens and detector assembly track the sun.
openaire +2 more sources