Results 11 to 20 of about 621 (173)

ON UNIFORMITY OF RASTER ILLUMINATION UNDER LASER SCANNING [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2016
The paper considers the possibility of a flat light field creation (light raster) of a large size by laser scanning at a distance of several tens of meters with angular sizes equal to 20º×4º.
S. A. Alekseev   +4 more
doaj   +1 more source

Performance Analyses of Photonic-Crystal Surface-Emitting Laser: Toward High-Speed Optical Communication

open access: yesNanoscale Research Letters, 2022
This study conducts comprehensive performance analyses of a commercial photonic-crystal surface-emitting laser (PCSEL) via small-signal measurement and the bit-error-rate test.
Chun-Yen Peng   +9 more
doaj   +1 more source

Analytical Solution to FRW Metric with Variable Speed of Light

open access: yesIndonesian Journal of Applied Physics, 2021
According to the principle of general covariance, the laws of physics are the same in all reference frames. The controversial theory of the Varying Speed of Light (VSL) contradicts the principle of general covariance.
Gabriel W. Joseph   +2 more
doaj   +1 more source

Mathematical Physics of Time Dilation through Curved Trajectories with Applications

open access: yesMathematics, 2023
In special relativity, the time dilation formula has been obtained by particles propagation in a straight line trajectory relative to an observer in motion. Up to now, there are no available formulas for other possible trajectories of particles. However,
Ayman Kamel   +4 more
doaj   +1 more source

A Predictive Energy Management Strategy for Multi-Energy Source Vehicles Based on Full-Factor Trip Information

open access: yesSensors, 2021
To achieve the real-time application of a dynamic programming (DP) control strategy, we propose a predictive energy management strategy (PEMS) based on full-factor trip information, including vehicle speed, slip ratio and slope.
Fenglai Yue   +4 more
doaj   +1 more source

Superluminal Motion-Assisted Four-Dimensional Light-in-Flight Imaging

open access: yesPhysical Review X, 2021
Advances in high-speed imaging techniques have opened new possibilities for capturing ultrafast phenomena such as light propagation in air or through media. Capturing light in flight in three-dimensional xyt space has been reported based on various types
Kazuhiro Morimoto   +3 more
doaj   +1 more source

Development of a speed breeding protocol with flowering gene investigation in pepper (Capsicum annuum)

open access: yesFrontiers in Plant Science, 2023
Pepper (Capsicum spp.) is a vegetable and spice crop in the Solanaceae family with many nutritional benefits for human health. During several decades, horticultural traits, including disease resistance, yield, and fruit quality, have been improved ...
Hayoung Choi   +7 more
doaj   +1 more source

Fast Light and the Speed of Information Transfer in the Presence of Detector Noise

open access: yesIEEE Photonics Journal, 2009
The phenomenon of fast-light pulse propagation has seen renewed interest in recent years, but its relationship to the speed of information transfer is still being debated.
Michael Z. Feng   +2 more
doaj   +1 more source

Orthogonal frequency division multiple access (OFDMA)-Based visible light communication systems

open access: yesResults in Engineering, 2023
Visible Light Communication (VLC) exploits visible light for high-speed data transmission; it serves as the medium for transmission using intensity modulation.
Yinjie Meng, Zhengjun Wei
doaj   +1 more source

Deep Learning-Based Robust Visible Light Positioning for High-Speed Vehicles

open access: yesPhotonics, 2022
Robustness is a key factor for real-time positioning and navigation, especially for high-speed vehicles. While visible light positioning (VLP) based on LED illumination and image sensors is widely studied, most of the VLP systems still suffer from the ...
Danjie Li   +12 more
doaj   +1 more source

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