Results 61 to 70 of about 145,188 (319)

Mode-Voltage Constrained Control for Adaptive Optics System

IEEE Photonics Journal
In the adaptive optics system of astronomical observation, the deformable mirror and the tip/tilt mirror are coupled during the correction process.
Ruitao Wang, Youming Guo, Nanfei Yan, Ying Yang, Lanqiang Zhang, Qiong Tu, Lingxiao Li, Changhui Rao   +7 more
doaj   +1 more source

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Nuclear star formation in the quasar PG1126-041 from adaptive optics assisted spectroscopy

, 2004
We present adaptive optics assisted spectroscopy of three quasars obtained with NACO at VLT. The high angular resolution achieved with the adaptive optics (~0.08"), joined to the diagnostic power of near-IR spectroscopy, allow us to investigate the ...
Cresci, G., Granato, G. L., Maiolino, R., Mannucci, F., Marconi, A.   +4 more
core   +1 more source

A Substellar Common Proper Motion Companion to the Pleiad HII 1348 [PDF]

, 2011
We announce the identification of a proper motion companion to the star HII 1348, a K5V member of the Pleiades open cluster. The existence of a faint point source 1.1arcsec away from HII 1348 was previously known from adaptive optics imaging by Bouvier ...
Alfonse Pham, Baraffe, Bouvier, Bouvier, Bouy, Burrows, Chabrier, Close, Close, Cushing, Dahn, Faherty, Golimowski, Hartkopf, James E. Larkin, Kerstin Geißler, Kirkpatrick, Lafrenière, Leggett, Lynne A. Hillenbrand, Marois, Martín, Martín, McElwain, Mermilliod, Metchev, Metchev, Metchev, Metchev, Meynet, Michael McElwain, Queloz, Rayner, Rebolo, Rodriguez, Stanimir A. Metchev, Stauffer, Steele, Zakhozhaj   +38 more
core   +3 more sources

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

The jet of the BL Lac object PKS 0521 -365 in the near-IR : MAD adaptive optics observations [PDF]

, 2009
BL Lac objects are low--power active nuclei exhibiting a variety of peculiar properties that are caused by the presence of a relativistic jet and orientation effects.
A., Treves, C., Arcidiacono, E., Diolaiti, E., Marchetti, E., Pian, F., Tavecchio, G., Giovannini, J., Farinato, J., Kolb, M., Lombini, Moretti, Alessia, R., Brast, R., Donaldson, R., Falomo, R., Ragazzoni, S., Tordo, T., Venturi   +16 more
core   +2 more sources

ESL-YOLO: Small Object Detection with Effective Feature Enhancement and Spatial-Context-Guided Fusion Network for Remote Sensing

Remote Sensing
Improving the detection of small objects in remote sensing is essential for its extensive use in various applications. The diminutive size of these objects, coupled with the complex backgrounds in remote sensing images, complicates the detection process.
Xiangyue Zheng, Yijuan Qiu, Gang Zhang, Tao Lei, Ping Jiang   +4 more
doaj   +1 more source

Real-Time Controller Based on FPGA and DSP for Solar Ground Layer Adaptive Optics Prototype System at 1-m NVST

IEEE Photonics Journal, 2017
Solar ground layer adaptive optics (GLAO), containing a large field of view (FOV) wavefront sensor (WFS) and one deformable mirror (DM), can be used to reduce and stabilize the seeing effectively over a wide FOV. As the brain of the GLAO system, the real-
Lin Kong, Lei Zhu, Lanqiang Zhang, Hua Bao, Changhui Rao   +4 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Large-scale wave-front reconstruction for adaptive optics systems by use of a recursive filtering algorithm [PDF]

, 2005
We propose a new recursive filtering algorithm for wave-front reconstruction in a large-scale adaptive optics system. An embedding step is used in this recursive filtering algorithm to permit fast methods to be used for wave-front reconstruction on an ...
Britton, Matthew, Dekany, Richard, Ren, Hongwu   +2 more
core   +1 more source