Results 51 to 60 of about 145,188 (319)

Wavefront sensing of atmospheric phase distortions at the Palomar 200-in. telescope and implications for adaptive optics [PDF]

, 1997
Major efforts in astronomical instrumentation are now being made to apply the techniques of adaptive optics to the correction of phase distortions induced by the turbulent atmosphere and by quasi-static aberrations in telescopes themselves.
Bloemhof, E. E., Ewald, S. P., Westphal, J. A.   +2 more
core   +1 more source

RS-FeatFuseNet: An Integrated Remote Sensing Object Detection Model with Enhanced Feature Extraction

Remote Sensing
With the advancement of satellite and sensor technologies, remote sensing images are playing crucial roles in both civilian and military domains. This paper addresses challenges such as complex backgrounds and scale variations in remote sensing images by
Yijuan Qiu, Jiefeng Xue, Gang Zhang, Xuying Hao, Tao Lei, Ping Jiang   +5 more
doaj   +1 more source

Experimental Demonstration of Adaptive Optics Correction of the External Aberrations for Distributed Fiber Laser Array

IEEE Access, 2021
A novel method of pre-compensating the phase distortions outside the fiber laser array based on active integrated wavefront sensing is proposed and demonstrated experimentally. The scheme and the working principle are introduced.
Chao Geng, Fan Zou, Feng Li, Guan Huang, Jing Zuo, Jiaying Liu, Zhihua Fan, Xinyang Li   +7 more
doaj   +1 more source

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

FEBS Letters, EarlyView.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii, Edoardo Andrea Cutolo, Daniele Montepietra, Claudia Battarra, Roberto Caferri, Stefano Capaldi, Zeno Guardini, Luca Dall'Osto, Roberto Bassi   +8 more
wiley   +1 more source

Development of a scalable generic platform for adaptive optics real time control

, 2015
The main objective of the present project is to explore the viability of an adaptive optics control system based exclusively on Field Programmable Gate Arrays (FPGAs), making strong use of their parallel processing capability.
Burse, Mahesh P., Parihar, Padmakar, Ramaprakash, A. N., Surendran, Avinash   +3 more
core   +1 more source

On-sky wide field adaptive optics correction using multiple laser guide stars at the MMT [PDF]

, 2008
We describe results from the first astronomical adaptive optics system to use multiple laser guide stars, located at the 6.5-m MMT telescope in Arizona. Its initial operational mode, ground-layer adaptive optics (GLAO), provides uniform stellar wavefront
Baranec, Baranec, Baranec, Baranec, Boccas, Casali, Christoph Baranec, Craig Kulesa, Don McCarthy, Egner, Ellerbroek, Freed, Gavel, Georges, Gilmozzi, Hinz, Keith Powell, Lloyd-Hart, Lloyd-Hart, Lloyd-Hart, Lloyd-Hart, Marchetti, Martin, McCarthy, Michael Hart, Miguel Snyder, Milton, N. Mark Milton, Pickering, Putnam, Rigaut, Stalcup, Szeto, Thomas Stalcup, Tokovinin, Vaitheeswaran, Velur, Verin, Vidhya Vaitheeswaran, Wildi, Wizinowich   +40 more
core   +2 more sources

Comparison of Wavefront Sensing Methods for Solar Ground-Layer Adaptive Optics: Multi-Direction Averaging and Wide-Field Correlation

Photonics
Solar ground-layer adaptive optics (GLAO) is widely recognized as a key technology for achieving high-resolution, wide-field imaging in ground-based solar telescopes. However, the accuracy differences among various wavefront sensing methods in solar GLAO
Yuhe Liu, Ziming Li, Qianhan Zhou, Nanfei Yan, Xian Ran, Ao Tang, Zhen Li, Lanqiang Zhang, Changhui Rao   +8 more
doaj   +1 more source

Wavefront Distortion Correction for the Non-Uniform-Intensity Light Based on Extreme Learning Machine

IEEE Photonics Journal, 2021
This paper aims to employ a neural network method of extreme learning machine to solve the problem of laser beam cleanup under the dynamic non-uniform-intensity distribution.
Haiqi Lin, Xing He, Shuai Wang, Ping Yang   +3 more
doaj   +1 more source

The role of fibroblast growth factors in cell and cancer metabolism

FEBS Letters, EarlyView.
Fibroblast growth factor (FGF) signaling regulates crucial signaling cascades that promote cell proliferation, survival, and metabolism. Therefore, FGFs and their receptors are often dysregulated in human diseases, including cancer, to sustain proliferation and rewire metabolism.
Jessica Price, Chiara Francavilla
wiley   +1 more source

An update of the on-sky performance of the Layer-Oriented wave-front sensor for MAD

, 2010
The Multi-conjugate Adaptive optics Demonstrator, MAD, successfully demonstrated on sky the MCAO technique both in Layer Oriented and Star Oriented modes. As results of the Guaranteed Time Observations in Layer Oriented mode quality astronomy papers have
Arcidiacono, Carmelo, Falomo, Renato, Farinato, Jacopo, Gullieuszik, Marco, Lombini, Matteo, Moretti, Alessia, Piotto, Giampaolo, Ragazzoni, Roberto   +7 more
core   +1 more source