Results 61 to 70 of about 321,734 (315)

Multiwavelength active optics Shack-Hartmann sensor for seeing and turbulence outer scale monitoring

open access: yes, 2014
Real-time seeing and outer scale estimation at the location of the focus of a telescope is fundamental for the adaptive optics systems dimensioning and performance prediction, as well as for the operational aspects of instruments.
Martinez, Patrice
core   +1 more source

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

open access: yesFEBS 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   +3 more
wiley   +1 more source

Progress toward a Soft X-ray Polarimeter

open access: yes, 2013
We are developing instrumentation for a telescope design capable of measuring linear X-ray polarization over a broad-band using conventional spectroscopic optics.
Gentry, Eric S.   +5 more
core   +1 more source

Optical magnetic lens: towards actively tunable terahertz optics

open access: yesNanoscale, 2021
2D materials immersed into a non-uniform, profiled magnetic field can focus THz light. This opens the door to novel magnetically-tunable 2D lenses for ultrafast applications.
Georgii Shamuilov   +4 more
openaire   +5 more sources

Mechanisms of parasite‐mediated disruption of brain vessels

open access: yesFEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira   +3 more
wiley   +1 more source

(INVITED)Switchable multi-wavelength mode-locked Yb-doped fiber laser using a polarization maintaining 45°-tilted fiber gratings based Lyot filter

open access: yesResults in Optics, 2021
We demonstrate a multi-wavelength mode-locked Yb-doped fiber laser by incorporating a pair of polarization maintaining 45° tilted fiber gratings (PM-45°TFG) based Lyot filter.
Yanlv Lin   +10 more
doaj   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

open access: yesFEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva   +5 more
wiley   +1 more source

The road to atomically thin metasurface optics

open access: yesNanophotonics, 2020
The development of flat optics has taken the world by storm. The initial mission was to try and replace conventional optical elements by thinner, lightweight equivalents.
Brongersma Mark L.
doaj   +1 more source

Association of mid-infrared solar plages with Calcium K line emissions and magnetic structures

open access: yes, 2007
Solar mid-IR observations in the 8-15 micrometer band continuum with moderate angular resolution (18 arcseconds) reveal the presence of bright structures surrounding sunspots.
A. M. Melo   +5 more
core   +1 more source

Variability of Young Massive Stars in the Arches Cluster [PDF]

open access: yes, 2010
We present preliminary results of the first near-infrared variability study of the Arches cluster, using adaptive optics data from NIRI/Gemini and NACO/VLT. The goal is to discover eclipsing binaries in this young (2.5 +- 0.5 Myr), dense, massive cluster
Alard   +6 more
core   +1 more source

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