Results 51 to 60 of about 58,393 (171)
The Influence of On-Orbit Micro-Vibration on Space Gravitational Wave Detection
Photonics, 2023 Large-aperture space telescopes have played an important role in space gravitational wave detection missions. Overcoming the influence of the space environment on interstellar laser distance measurement and realistic high-concentration laser distance ...
Zhiwei Chen +4 more
doaj +1 more source
Monte Carlo Studies of medium-size telescope designs for the Cherenkov Telescope Array [PDF]
, 2015 We present studies for optimizing the next generation of ground-based imaging atmospheric Cherenkov telescopes (IACTs). Results focus on mid-sized telescopes (MSTs) for CTA, detecting very high energy gamma rays in the energy range from a few hundred GeV to a few tens of TeV.
arxiv +1 more source
Advanced Functional Materials, EarlyView.The oxygen spillover from Ir to the oxide support with interfacial oxygen vacancies during OER is revealed. These interfacial oxygen vacancies as an oxygen transport zone not only regulate the in situ Ir catalytic structure toward boosted activity but also suppress Ir over‐oxidation via directional OH‐filling effects, thereby ensuring overall high ...
Yu Zhu +11 more
wiley +1 more source
Active Optics in Astronomy: Freeform Mirror for the MESSIER Telescope Proposal
Mathematical and Computational Applications, 2018 Active optics techniques in astronomy provide high imaging quality. This paper is dedicated to highly deformable active optics that can generate non-axisymmetric aspheric surfaces—or freeform surfaces—by use of a minimum number of actuators ...
Gerard Rene Lemaitre +2 more
doaj +1 more source
Structure of distributed control system in Seimei telescope
SICE Journal of Control, Measurement, and System Integration, 2021 A segmented mirror control system is indispensable for operating an astronomical telescope which is equipped with a segmented primary mirror. In this study, we focus on the distributed control system (DCS) proposed for Seimei telescope.
Ichiro Jikuya +4 more
doaj +1 more source
How to focus a Cherenkov telescope [PDF]
J.Phys.G27:933,2001, 2001 Cherenkov telescopes image the Cherenkov emission from air showers. A priori, it is not obvious if the `best' images are achieved by measuring Cherenkov photon angles, i.e. focusing the telescope at infinity, or by considering the air shower as an object to be imaged, in which case one might focus the telescope on the central region of the shower.
arxiv +1 more source
Structured Light Projection Using Image Guide Fibers for In Situ Photo‐biofabrication
Advanced Materials, EarlyView.Light‐based biofabrication is typically performed with single wavelength light sources and within benchtop devices. This work demonstrates FaSt‐Light (Fiber‐assisted Structured Light) as a new approach to achieve multiwavelength image projection using flexible image guide fibers, which enables a variety of applications for in situ biofabrication ...
Parth Chansoria +8 more
wiley +1 more source
IEEE Photonics Journal, 2023 Atmospheric dispersion is a wavelength-dependent effect that affects astronomical observations performed using ground-based telescopes. The effect of atmospheric dispersion for a 4-meter telescope is analyzed and an atmospheric dispersion corrector (ADC)
Guoqing Gao +5 more
doaj +1 more source
Paper Productivity of Ground-based Large Optical Telescopes from 2000 to 2009 [PDF]
, 2011 We present an analysis of the scientific ("refereed") paper productivity of the current largest (diameter >8 m) ground-based optical(-infrared) telescopes during the ten year period from 2000 to 2009. The telescopes for which we have gathered and analysed the scientific publication data are the two 10 m Keck telescopes, the four 8.2 m Very Large ...
arxiv +1 more source
Contactless Tracking of Decomposition in Self‐Reporting Ceramic Cr‐Al‐B Coatings
Advanced Materials Interfaces, EarlyView.Proof of concept for contactless tracking of decomposition in self‐reporting ceramic Cr‐Al‐B coatings in extreme environments by contactless resistivity measurements is demonstrated. To verify the results, high resolution in situ and ex situ methods are employed.
Peter J. Pöllmann +13 more
wiley +1 more source