Results 41 to 50 of about 134,603 (317)

THE ASTRONOMICAL TELESCOPE [PDF]

open access: yesSchool Science and Mathematics, 1913
n ...
openaire   +2 more sources

Neutrino Telescopes [PDF]

open access: yesAIP Conference Proceedings, 2006
The observation of high energy cosmic neutrinos can shed light on the astrophysical sites and mechanisms involved in the acceleration of protons and nuclei to the high energies observed at Earth by cosmic ray detectors. More generally, high energy neutrinos can be a key instrument in the multimessenger study of the high energy sky.
openaire   +2 more sources

Active optics in astronomy – modeling of deformable substrates: freeform surfaces for FIREBall and MESSIER

open access: yesJournal of the Mechanical Behavior of Materials, 2018
Active optics techniques on large telescopes and astronomical instrumentations provide high imaging quality. For ground-based astronomy, the co-addition of adaptive optics again increases angular resolution up to providing diffraction-limited imaging at ...
Lemaitre Gérard Rene
doaj   +1 more source

Implementing of the ISON project in Northern Mexico

open access: yesOpen Astronomy, 2018
ISON, being an open international project that collects and interprets data about space objects for scientific analysis and spacecraft operators, includes about 40 observational sites.
Mokhnatkin Artem   +5 more
doaj   +1 more source

Telescopic Denture [PDF]

open access: yesThe Open Dentistry Journal, 2018
Aim:This article explains the concept of telescopic denture.Procedure:It describes the different types of telescopic attachment (or double crown), and provides an overview of the advantages and the disadvantages of this type of prosthodontic treatment.Conclusion:The indications and the clinical applications of telescopic denture are discussed.
Hakkoum, Mohammad Ayham, Wazir, Ghassan
openaire   +2 more sources

Discrete Time Dynamic Model for Telescope Auto-Guiding System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
In the auto-guiding system for obtaining a long exposure astrophotography, CCD camera is usually used for measuring guide errors which are affected by optical dispersion and mechanical disturbances.
Joon Hwa Lee
doaj   +1 more source

L’observatoire de Juvisy-sur-Orge, l’« univers d’un chercheur » à sauvegarder

open access: yesIn Situ, 2017
In 1882, Camille Flammarion was given a property at Juvisy-sur-Orge by one of his admirers. He transformed the house into an astronomical observatory and installed what was for its day advanced scientific equipment.
Colette Aymard, Laurence-Anne Mayeur
doaj   +1 more source

The MAGIC telescope [PDF]

open access: yesProceedings of International Europhysics Conference on High Energy Physics — PoS(HEP2005), 2007
MAGIC (Major Atmospheric Gamma Imaging Cherenkov telescope) is presently the largest ground-based gamma ray telescope. MAGIC has been taking data regularly since October 2004 at the Roque de los Muchachos Observatory on the island of La Palma. In this paper the MAGIC telescope status, its performances and some preliminary results on observed gamma ray ...
openaire   +3 more sources

Low Vision Aids: Visual Outcomes and Barriers in Children with Low Vision

open access: yesDelhi Journal of Ophthalmology, 2019
Aims: To study the demographic profile, cause of low vision, visual outcome and the barriers in using low vision aids (LVA). Design: Prospective observational clinical study.
V. R. Venkataramanan   +5 more
doaj   +1 more source

Active optics: deformable mirrors with a minimum number of actuators [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2012
We present two concepts of deformable mirror to compensate for first order optical aberrations. Deformation systems are designed using both elasticity theory and Finite Element Analysis in order to minimize the number of actuators.
Laslandes M., Hugot E., Ferrari M.
doaj   +1 more source

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