Results 141 to 150 of about 669,418 (322)

Focused laser Doppler velocimeter [PDF]

, 1976
A system for remotely measuring velocities present in discrete volumes of air is described. A CO2 laser beam is focused by a telescope at such a volume, a focal volume, and within the focusable range, near field, of the telescope.
Bilbro, J. W., Campbell, R. B., Jr., Dahm, W. K., Huffaker, R. M., Jeffreys, H. B., Jelalian, A. V., Keene, W. H., Krause, M. C., Lawrence, T. R., Sonnenschein, C. M.   +9 more
core   +1 more source

An Autonomous Observation and Control System Based on EPICS and RTS2 for Antarctic Telescopes

, 2015
For an unattended telescopes in Antarctic, the remote operation, autonomous observation and control are essential. An EPICS (Experimental Physics and Industrial Control System) and RTS2(Remote Telescope System, 2nd Version) based autonomous observation ...
Chen, Jie, Dong, Shu-Cheng, Jia, Ming-Hao, Jiang, Fengxin, Liu, Jia-Jing, Tang, Peng-Yi, Wang, Jian, Wu, Wen-Qing, Zhang, Guang-Yu, Zhang, Hong-Fei   +9 more
core   +1 more source

Synthesis of DOPO‐Containing Melamine Flame Retardant and Its Effect on the Flame‐Retardant Properties of Waterborne Polyurethane

Journal of Applied Polymer Science, EarlyView.
DOPO‐containing melamine flame retardants improve the flame retardancy, droplet resistance and mechanical properties of WPU. ABSTRACT To improve the flame retardancy of waterborne polyurethane (WPU), two novel DOPO‐containing melamine‐based flame retardants were synthesized by combining Schiff bases (derived from p‐hydroxybenzaldehyde ...
Chao Liu, Jing Yang, Mengdan Chen, Qiuting Lu, Guoyong Zhou   +4 more
wiley   +1 more source

Lunar transit telescope lander design [PDF]

The Program Development group at NASA's Marshall Space Flight Center has been involved in studying the feasibility of placing a 16 meter telescope on the lunar surface to scan the skies using visible/ Ultraviolet/ Infrared light frequencies.
Omar, Husam A.
core   +1 more source

Synapsids and sensitivity: Broad survey of tetrapod trigeminal canal morphology supports an evolutionary trend of increasing facial tactile specialization in the mammal lineage

The Anatomical Record, EarlyView.
Abstract The trigeminus nerve (cranial nerve V) is a large and significant conduit of sensory information from the face to the brain, with its three branches extending over the head to innervate a wide variety of integumentary sensory receptors, primarily tactile.
Juri A. Miyamae, Julien Benoit, Irina Ruf, Zoleka Sibiya, Bhart‐Anjan S. Bhullar   +4 more
wiley   +1 more source

Uncertainties in Historic Visual Double Star Measures—III Accurate Calibration Pairs

Astronomische Nachrichten, EarlyView.
ABSTRACT Based on space‐based positions and proper motions, we present accurate rectilinear elements for 857 double star pairs over the celestial sphere. These elements allow for the computation of precision ephemeris Position Angles and Separations of these pairs.
Roderick R. Letchford, Graeme L. White
wiley   +1 more source

Time and phase alignment of distributed gateways: Theoretical analysis and experimental demonstration

International Journal of Satellite Communications and Networking, EarlyView., 2023
The performance limitation in multiple‐input multiple‐output (MIMO) feeder links due to time and phase misalignment of the ground stations is investigated. Time and phase distribution over optical fiber is considered as an approach to achieve the synchronization requirements.
Eriserdi Mollaymeri, Thomas Delamotte, Andreas Knopp   +2 more
wiley   +1 more source

Modular adaptive optics solution for a QKD receiver on a fork mount telescope system [PDF]

, 2021
Edgar Fischer, K. Kudielka, Aoife Brady, Andreas Kamm, Thomas Berkefeld, Rupert Ursin   +5 more
openalex   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, EarlyView.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

Ground-based tests of JEM-EUSO components at the Telescope Array site, “EUSO-TA” [PDF]

, 2015
Jenni Adams, S. Ahmad, J. -N. Albert, D. Allard, Luis A. Anchordoqui, Vladimir Andreev, A. Anzalone, Y. Arai, Katsuaki Asano, M. Ave Pernas, P. Baragatti, P. Barrillon, T. Batsch, J. Bayer, R. Bechini, T. Belenguer, R. Bellotti, K. Belov, Andreas A. Berlind, М. Бертаина, Peter L. Biermann, S. Biktemerova, C. Blaksley, Nicolas Blanc, J. Błȩcki, S. Blin-Bondil, J. Blümer, P. Bobík, M. Bogomilov, Massimiliano Bonamente, M. S. Briggs, S. Briz, A. Bruno, F. Cafagna, D. Campana, J. N. Capdevielle, R. Caruso, M. Casolino, Claudio Cassardo, G. Castellinic, C. Catalano, Gelsomina Catalano, A. Cellino, M. Chikawa, M. J. Christl, Daren B. H. Cline, V. Connaughton, L. Conti, G. Cordero, H.J. Crawford, Roberto Cremonini, S. E. Csorna, S. Dagoret-Campagne, A. J. de Castro, C. De Donato, C. De La Taille, C. De Santis, L. del Peral, A. Dell’Oro, N. De Simone, M. Di Martino, G. Distratis, F. Dulucq, M. Dupieux, A. Ebersoldt, Toshikazu Ebisuzaki, R. Engel, S. Falk, Ke Fang, Francesco Fenu, I. Fernández-Gómez, S. Ferrarese, D. Finco, Marta Flamini, C. Fornaro, A. Franceschi, J. Fujimoto, M. Fukushima, P. Galeotti, G. Garipov, Joseph M. Geary, Graciela B. Gelmini, G. Giraudo, M. Gonchar, C. González Alvarado, P. Gorodetzky, F. Guarino, A. Guzmán, Y. Hachisu, B. Harlov, A. Haungs, J. Hernández Carretero, K. Higashide, D. Ikeda, H. Ikeda, N. Inoue, Susumu Inoue, A. Insolia, Francesco Isgrò, Y. Itow   +99 more
openalex   +1 more source