Results 31 to 40 of about 55,377 (313)
Optics for Nano-Satellite X-Ray Monitor
Open Astronomy, 2015 The Schmidt lobster eye design for a grazing incidence X-ray optics provides a field of view of the order of many degrees, for this reason it can be a convenient approach for the construction of space X-ray monitors.
Tichý Vladimír +3 more
doaj +1 more source
Modular and Stereoselective Synthesis of Cyclobutane β‐Amino Alcohols
Angewandte Chemie, EarlyView.Late‐stage functionalization and photoisomerization of 1,2‐azaborine leads to a general strategy for the synthesis of diversely substituted cyclobutane β‐amino alcohols. The relative stereochemistry of the resulting products is unambiguously defined by the stereospecific and stereoselective nature of the photoisomerization‐hydrogenation‐oxidation ...
Xinyu Yang +3 more
wiley +2 more sources
AIP Conference Proceedings, 2002 In this paper we present an overview of the Telescope designed for ESA's mission dedicated to map the Cosmic Microwave Background Anisotropies and Polarization. Two instruments, LFI and HFI, operate in an overall frequency range between 25 and 900 GHz and share the focal region of the 1.5 meter optimized telescope.
F. Villa +9 more
openaire +2 more sources
The Asiago Astrophysical Observatory and the Recently Refurbished 1.22 m Galileo telescope
Open Astronomy, 2012 A history of the 1.22 m Galileo telescope of the Asiago Astrophysical Observatory is described.
Rafanelli Piero, Siviero Alessandro
doaj +1 more source
Event types in H.E.S.S.: A combined analysis for different telescope types and energy ranges
Astronomy & AstrophysicsImaging atmospheric Cherenkov telescopes (IACTs) are the main technique for detecting gamma rays with energies between tens of GeV and hundreds of TeV.
Guedes Lang Rodrigo +5 more
doaj +1 more source
A profile of patients presenting at a low vision clinic in a resource-limited setting
African Vision and Eye Health, 2020 Background: The university-based low vision clinic is one of the few low vision clinics in South Africa. Aim: To describe demographic and clinical profiles of patients who attended this clinic from 2010 to 2017.
Zamadonda N.Q. Xulu-Kasaba +6 more
doaj +1 more source
Laser guide stars and turbulence profiling for extremely large telescopes [PDF]
, 2006 The next generation of ground based telescopes, the so-called extremely large telescopes, will offer a significant leap in sensitivity and resolution compared to current telescopes. They also present a range of technical challenges.
Butterley, Timothy
core
Gravitational deformation of ring-focus antennas for VGOS: first investigations at the Onsala twin telescopes project [PDF]
, 2019 The receiving properties of radio telescopes used in geodetic and astrometric very long baseline interferometry (VLBI) depend on the surface quality and stability of the main reflector.
Lösler, Michael, +7 more
core +1 more source
Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization
Advanced Materials Interfaces, EarlyView.Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan +6 more
wiley +1 more source
CLEAN and multiscale CLEAN for STIX in Solar Orbiter
Astronomy & AstrophysicsCLEAN is a well-established deconvolution approach to Fourier imaging at radio wavelengths and hard X-ray energies. One of the main limitations of CLEAN for hard X-ray imaging is that it requires a final convolution step by means of a convolution kernel ...
Catalano Miriana +4 more
doaj +1 more source