Results 51 to 60 of about 176,448 (289)

The Status of the H.E.S.S. Project

, 2004
The High Energy Stereoscopic System (H.E.S.S.) - is a system of four, 107 m^2 mirror area, imaging Cherenkov telescopes under construction in the Khomas Highland of Namibia (1800 m asl). The H.E.S.S. system is characterised by a low threshold (~ 100 GeV)
Hinton, J. A.
core   +2 more sources

Observability of pulsar beam bending by the Sgr~A* black hole [PDF]

, 2011
According to some models, there may be a significant population of radio pulsars in the Galactic center. In principle, a beam from one of these pulsars could pass close to the supermassive black hole (SMBH) at the center, be deflected, and be detected by
ATNF Pulsar Catalog, Broderick, Cordes, Deneva, Eisenhauer, Faucher-Giguère, Fredrick A. Jenet, Freitag, Ghez, Hopman, Johnston, Kevin Stovall, Kramer, Lorimer, Maness, Melia, Muno, Nayakshin, Pfahl, Rankin, Richard H. Price, Teviet Creighton, Wang, Wang   +23 more
core   +3 more sources

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

James Short and John Harrison: personal genius and public knowledge

Science Museum Group Journal, 2014
The instrument maker James Short, whose output was exclusively reflecting telescopes, was a sustained and consistent supporter of the clock and watch maker John Harrison.
Professor Jim Bennett
doaj   +1 more source

Geometric calibration of Colour and Stereo Surface Imaging System of ESA's Trace Gas Orbiter [PDF]

, 2017
There are many geometric calibration methods for "standard" cameras. These methods, however, cannot be used for the calibration of telescopes with large focal lengths and complex off-axis optics.
Cremonese, Gabriele, Fleuret, Francois, Ivanov, Anton, Pommerol, Antoine, Roloff, Victoria, Thomas, Nicolas, Tulyakov, Stepan, Weigel, Thomas   +7 more
core   +2 more sources

Heterogeneous Visible‐Light Photocatalysis in Continuous‐Flow: A Synergistic Strategy for Challenging Trifluoromethylation of α, α‐Diaryl Allylic Alcohols via 1,2‐aryl Migration

Advanced Science, EarlyView.
A continuous‐flow photocatalytic strategy is presented for the efficient synthesis of β‐trifluoromethyl ketones under visible light. Using a recyclable solid photocatalyst and an inexpensive CF3 source, the method enables rapid reactions, easy scale‐up, and smooth integration into multistep flow synthesis of bioactive molecules.
Peiwen Liu, Weiping Zhu, Xuhong Qian, Fang Zhao   +3 more
wiley   +1 more source

Routing Optimization of Cable‐Driven Octopus‐Inspired Manipulators With Minimal Actuation via Genetic Algorithm and Finite Element Method

Advanced Intelligent Systems, EarlyView.
Soft robotic arms are promising for gentle grasping but often rely on bulky actuation systems. This work presents a computational design framework that optimizes tendon number and routing to achieve target grasps with fewer actuators. Validated on an octopus‐inspired underwater arm, the approach enables efficient, underactuated soft manipulators for ...
Michele Martini, Emanuele Solfiti, Alessio Mondini, Emanuela Del Dottore, Alberto Parmiggiani, Edoardo Sinibaldi, Barbara Mazzolai   +6 more
wiley   +1 more source

Torque control system [PDF]

, 1975
System stabilizes aximuth of gondolas which are carried by high-altitude balloons as platforms for tracking telescopes. When telescopes must be constantly aimed at specific targets, control system stabilizes gondola to within 5 arc ...
Squillari, W., Studenick, D. K., Tyler, A. L.   +2 more
core   +1 more source

Cross Calibration of Telescope Optical Throughput Efficiencies using Reconstructed Shower Energies for the Cherenkov Telescope Array

, 2015
For reliable event reconstruction of Imaging Atmospheric Cherenkov Telescopes (IACTs), calibration of the optical throughput efficiency is required. Within current facilities, this is achieved through the use of ring shaped images generated by muons ...
Bernloehr, K., Hofmann, W., Mitchell, A. M. W., Parsons, R. D.   +3 more
core   +1 more source

Event types in H.E.S.S.: A combined analysis for different telescope types and energy ranges

Astronomy & Astrophysics
Imaging 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, Unbehaun Tim, Mohrmann Lars, Steinmassl Simon, Hinton Jim, Funk Stefan   +5 more
doaj   +1 more source