Results 51 to 60 of about 117,696 (296)

Research on Adaptive Optics Image Restoration Algorithm by Improved Expectation Maximization Method

Abstract and Applied Analysis, 2014
To improve the effect of adaptive optics images’ restoration, we put forward a deconvolution algorithm improved by the EM algorithm which joints multiframe adaptive optics images based on expectation-maximization theory.
Lijuan Zhang, Dongming Li, Wei Su, Jinhua Yang, Yutong Jiang   +4 more
doaj   +1 more source

A Local Threshold Checkerboard Algorithm for Adaptive Optics System With a Plenoptic Sensor

IEEE Photonics Journal, 2022
Adaptive optics systems will encounter challenges under strong atmospheric turbulence conditions. Recently, a modified approach based on plenoptic sensor has attracted considerable attention.
Zhichong Wang, Tao Chen, Xudong Lin, Liang Wang, Qichang An, Jintian Hu   +5 more
doaj   +1 more source

Ground-Based Coronagraphy with High Order Adaptive Optics [PDF]

, 2001
We summarize the theory of coronagraphic optics, and identify a dimensionless fine-tuning parameter, F, which we use to describe the Lyot stop size in the natural units of the coronagraphic optical train and the observing wavelength.
Anand Sivaramakrishnan, Christopher D. Koresko, Fried D. L., Glindemann A., Golimowski D. A., Lyot B., Malbet F., Marc J. Kuchner, Noll R. J., Russell B. Makidon, Thomas Berkefeld, Wang T.   +11 more
core   +2 more sources

Inhibiting stearoyl‐CoA desaturase suppresses bone metastatic prostate cancer by modulating cellular stress, mTOR signaling, and DNA damage response

FEBS Letters, EarlyView.
Bone metastasis in prostate cancer (PCa) patients is a clinical hurdle due to the poor understanding of the supportive bone microenvironment. Here, we identify stearoyl‐CoA desaturase (SCD) as a tumor‐promoting enzyme and potential therapeutic target in bone metastatic PCa.
Alexis Wilson, Mackenzie K Herroon, Shane Mecca, Laimar C Garmo, Jacob Lindquist, Shrila Rajendran, Steve M. Patrick, Izabela Podgorski   +7 more
wiley   +1 more source

All-optical recording and stimulation of retinal neurons in vivo in retinal degeneration mice. [PDF]

PLoS ONE, 2018
Here we demonstrate the application of a method that could accelerate the development of novel therapies by allowing direct and repeatable visualization of cellular function in the living eye, to study loss of vision in animal models of retinal disease ...
Soon Keen Cheong, Jennifer M Strazzeri, David R Williams, William H Merigan   +3 more
doaj   +1 more source

The Performance of the Robo-AO Laser Guide Star Adaptive Optics System at the Kitt Peak 2.1-m Telescope [PDF]

, 2017
Robo-AO is an autonomous laser guide star adaptive optics system recently commissioned at the Kitt Peak 2.1-m telescope. Now operating every clear night, Robo-AO at the 2.1-m telescope is the first dedicated adaptive optics observatory.
Baranec, Christoph, Duev, Dmitry A., Jensen-Clem, Rebecca, Kulkarni, S. R., Law, Nicholas M., Ramprakash, A. N., Riddle, Reed, Salama, Maïssa   +7 more
core   +3 more sources

Organ‐specific redox imbalances in spinal muscular atrophy mice are partially rescued by SMN antisense oligonucleotides

FEBS Letters, EarlyView.
We identified a systemic, progressive loss of protein S‐glutathionylation—detected by nonreducing western blotting—alongside dysregulation of glutathione‐cycle enzymes in both neuronal and peripheral tissues of Taiwanese SMA mice. These alterations were partially rescued by SMN antisense oligonucleotide therapy, revealing persistent redox imbalance as ...
Sofia Vrettou, Brunhilde Wirth
wiley   +1 more source

Apollon Real-Time Adaptive Optics: astronomy-inspired wavefront stabilization in ultraintense lasers

High Power Laser Science and Engineering
Traditional wavefront control in high-energy, high-intensity laser systems usually lacks real-time capability, failing to address dynamic aberrations.
J. B. Ohland, N. Lebas, V. Deo, O. Guyon, F. Mathieu, P. Audebert, D. Papadopoulos   +6 more
doaj   +1 more source

Astroclimatic statistics at the Sayan Solar Observatory

Solar-Terrestrial Physics, 2020
The paper analyzes meteorological and optical characteristics of the atmosphere at the Sayan Solar Observatory (SSO) and the future 3 m Large Solar Telescope (LST-3).
Shikhovtsev A.Yu., Kovadlo P.G., Kiselev A.V.   +2 more
doaj   +1 more source

Wavefront Recovery for Multiple Sun Regions in Solar SCAO Scenarios with Deep Learning Techniques

Mathematics, 2023
The main objective of an Adaptive Optics (AO) system is to correct the aberrations produced in the received wavefronts, caused by atmospheric turbulence.
Sergio Luis Suárez Gómez, Francisco García Riesgo, Saúl Pérez Fernández, Francisco Javier Iglesias Rodríguez, Enrique Díez Alonso, Jesús Daniel Santos Rodríguez, Francisco Javier De Cos Juez   +6 more
doaj   +1 more source