Results 61 to 70 of about 403,575 (349)

FlowDA: Unsupervised Domain Adaptive Framework for Optical Flow Estimation [PDF]

arXiv, 2023
Collecting real-world optical flow datasets is a formidable challenge due to the high cost of labeling. A shortage of datasets significantly constrains the real-world performance of optical flow models. Building virtual datasets that resemble real scenarios offers a potential solution for performance enhancement, yet a domain gap separates virtual and ...
arxiv  

Simulations of Adaptive Optics with a Laser Guide Star for SINFONI

, 2004
The SINFONI instrument for ESO's VLT combines integral field spectroscopy and adaptive optics (AO). We discuss detailed simulations of the adaptive optics module.
Brown, Anthony G A, Fedrigo, Enrico, van der Werf, Paul   +2 more
core   +1 more source

ALFA: First Operational Experience of the MPE/MPIA Laser Guide Star System for Adaptive Optics [PDF]

, 1998
The sodium laser guide star adaptive optics system ALFA has been constructed at the Calar Alto 3.5-m telescope. Following the first detection of the laser beacon on the wavefront sensor in 1997 the system is now being optimized for best performance.
Davies, R. I., Eckart, A., Hackenberg, W., Holstenberg, H. -C., Kasper, M., Ott, T., Quirrenbach, A., Rabien, S.   +7 more
core   +3 more sources

Recognizing early MRI signs (or their absence) is crucial in diagnosing metachromatic leukodystrophy

Annals of Clinical and Translational Neurology, Volume 9, Issue 12, Page 1999-2009, December 2022., 2022
Abstract Objectives Metachromatic leukodystrophy (MLD) has characteristic white matter (WM) changes on brain MRI, which often trigger biochemical and genetic confirmation of the diagnosis. In early or pre‐symptomatic disease stages, these typical MRI changes might be absent, hampering early diagnosis.
Daphne H. Schoenmakers, Shanice Beerepoot, Ingeborg Krägeloh‐Mann, Saskia Elgün, Benjamin Bender, Marjo S. van der Knaap, Nicole I. Wolf, Samuel Groeschel   +7 more
wiley   +1 more source

Astronomical adaptive optics: a review

PhotoniX
Since the concept of adaptive optics(AO) was proposed in 1953, AO has become an indispensable technology for large aperture ground-based optical telescopes aimed at high resolution observations.
Changhui Rao, Libo Zhong, Youming Guo, Min Li, Lanqiang Zhang, Kai Wei   +5 more
doaj   +1 more source

Multi-Aperture Adaptive Fiber-Coupled Free-Space Optical Communication System: Scintillation Mitigation and Turbulence Compensation Experiment Based on Gamma-Gamma Channel Modeling

IEEE Photonics Journal
Free-space optical communication is an effective alternative solution to address the “last mile” bottleneck in fiber-optic communication systems.
Ziting Pan, Yuting Li, Yijie Shen, Ziqiang Li, Guan Huang, Chao Geng, Xinyang Li   +6 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

Optical soliton solutions of the quintic complex Swift-Hohenberg equation [PDF]

Conference Proceeding of Australian Conference on Fibre Optic Technology 2002, 2002
Using a direct ansatz approach, we have found a number of zero-velocity analytic solutons of the complex quintic Swift-Hohenberg equation. These find application in assorted optical problems.
arxiv   +1 more source

High-speed imaging and wavefront sensing with an infrared avalanche photodiode array [PDF]

, 2015
Infrared avalanche photodiode arrays represent a panacea for many branches of astronomy by enabling extremely low-noise, high-speed and even photon-counting measurements at near-infrared wavelengths.
Atkinson, Dani, Baranec, Christoph, Chun, Mark, Hall, Donald, Jacobson, Shane, Law, Nicholas M., Riddle, Reed   +6 more
core   +3 more sources

Targeting rapid TKI‐induced AXL upregulation overcomes adaptive ERK reactivation and exerts antileukemic effects in FLT3/ITD acute myeloid leukemia

Molecular Oncology, EarlyView.
Adaptive ERK reactivation hinders FLT3 tyrosine kinase inhibitor (TKI) treatment in FLT3/ITD acute myeloid leukemia. Here, we report that FLT3 TKI treatment rapidly induces AXL expression and upregulation that is temporally associated with the adaptive ERK reactivation.
Tessa S. Seale, Li Li, J. Kyle Bruner, Melody Chou, Bao Nguyen, Jaesung Seo, Ruiqi Zhu, Mark J. Levis, Christine A. Pratilas, Donald Small   +9 more
wiley   +1 more source