Results 121 to 130 of about 669,418 (322)

Optimizing Space Telescopes’ Thermal Performance through Uncertainty Analysis: Identification of Critical Parameters and Shaping Test Strategy Development

Aerospace
The integration of uncertainty analysis methodologies allows for improving design efficiency, particularly in the context of instruments that demand precise pointing accuracy, such as space telescopes.
Uxia Garcia-Luis, Alejandro M. Gomez-San-Juan, Fermin Navarro-Medina, Carlos Ulloa-Sande, Alfonso Yñigo-Rivera, Alba Eva Peláez-Santos   +5 more
doaj   +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, Pascal Vola, Eduard Muslimov   +2 more
doaj   +1 more source

From Complex Shaping to Mirror Finish: Additive Manufacturing of Aerospace‐grade Cf/SiC Space Optics

Advanced Science, EarlyView.
An integrated additive manufacturing route combines selective laser sintering, engineered interphases, and optimized silicon infiltration to fabricate complex Cf/SiC composites. The approach enables precise shaping, high mechanical performance, and excellent optical reflectivity, offering a scalable solution for advanced aerospace optics with both ...
Buhao Zhang, Li Wang, Xiao Chen, Yuquan Wei, Huisheng Tian, Zhengren Huang, Xuejian Liu, Zhongming Chen, Jie Yin   +8 more
wiley   +1 more source

A Comprehensive Exploration of Contemporary Photonic Devices in Space Exploration: A Review

Photonics
Photonics plays a pivotal role in propelling space exploration forward, providing innovative solutions to address the challenges presented by the unforgiving and expansive realm of outer space.
Muhammad A. Butt
doaj   +1 more source

Cortical Microvascular Pulsatility in the Aging Mouse Brain and the Confounding Effects of Anesthesia

Advanced Science, EarlyView.
Multi‐modal optical imaging reveals microvascular pulsatility in the brain cortex of awake and anaesthetized mice. Awake hemodynamics in male mice are found to be remarkably stable until late life, with flow pulsatility being significantly higher than in females, despite similar average perfusion.
Mia Viuf Skøtt, Elizaveta Melnikova, Eugenio Gutiérrez, Vladimir Matchkov, Leif Østergaard, Dmitry D Postnov   +5 more
wiley   +1 more source

The Cherenkov Telescope Array Large Size Telescope

, 2013
The two arrays of the Very High Energy gamma-ray observatory Cherenkov Telescope Array (CTA) will include four Large Size Telescopes (LSTs) each with a 23 m diameter dish and 28 m focal distance.
Ambrosi, G., Awane, Y., Baba, H., Bamba, A., Barceló, M., Barrio, J. A., Bigas, O. Blanch, Boix, J., Brunetti, L., Carmona, E., Chabanne, E., Chikawa, M., Colin, P., Conteras, J. L., Cortina, J., Dazzi, F., de Almeida, U. Barres, Deangelis, A., Deleglise, G., Delgado, C., Dubois, F., Díaz, C., Fiasson, A., Fink, D., Flour, T. Le, Fouque, N., Freixas, L., Fruck, C., Gadola, A., García, R., Gascon, D., Geffroy, N., Giglietto, N., Giordano, F., Grañena, F., Gunji, S., Hagiwara, R., Hamer, N., Hanabata, Y., Hassan, T., Hatanaka, K., Haubold, T., Hayashida, M., Hermel, R., Herranz, D., Hirotani, K., Inoue, S., Inoue, Y., Ioka, K., Jablonski, C., Kagaya, M., Katagiri, H., Kishimoto, T., Kodani, K., Kohri, K., Konno, Y., Koyama, S., Kubo, H., Kushida, J., Lamanna, G., Lorenz, E., López, R., López-Moya, M., Majumdar, P., Manalaysay, A., Mariotti, M., Martínez, G., Martínez, M., Mazin, D., Miranda, J. M., Mirzoyan, R., Monteiro, I., Moralejo, A., Murase, K., Nagataki, S., Nakajima, D., Nakamori, T., Nishijima, K., Noda, K., Nozato, A., Ohira, Y., Ohishi, M., Ohoka, H., Okumura, A., Orito, R., Panazol, J. L., Paneque, D., Paoletti, R., Paredes, J. M., Pauletta, G., Podkladkin, S., Prast, J., Rando, R., Reimann, O., Ribó, M., Rosier-Lees, S., Saito, K., Saito, T., Saito, Y., Sakaki, N., Sakonaka, R., Sanuy, A., Sasaki, H., Sawada, M., Scalzotto, V., Schultz, S., Schweizer, T., Shibata, T., Shu, S., Sieiro, J., Stamatescu, V., Steiner, S., Straumann, U., Sugawara, R., Tajima, H., Takami, H., Tanaka, M., Tanaka, S., Tejedor, L. A., Terada, Y., Teshima, M., Totani, T., Ueno, H., Umehara, K., Vollhardt, A., Wagner, R., Wetteskind, H., Yamamoto, T., Yamazaki, R., Yoshida, A., Yoshida, T., Yoshikoshi, T.   +131 more
core   +1 more source

Gutmann Donor Theory‐Guided Design of Mononuclear Ionic Cluster for Exceptional N‐Type Thermoelectric Ionogel

Advanced Science, EarlyView.
Super‐stretchable and self‐healing polyacrylate ternary ionogel elastomers are used for flexible i‐TE devices. Based on Gutmann donor theory of doped anion, the work proposes a three‐parameter tuning strategy of flexible polymer‐doped anion‐synergistic cation to achieve the systematic design of ionic thermoelectric materials. Abstract Quasi‐solid‐state,
Bin Chen, Mingxuan Tian, Hongji Wang, Yun Jin, Heng Tang, Xingrui Chen, Shengxue Yu, Changyuan Yan, Wenwei Lei, Taihong Wang   +9 more
wiley   +1 more source

Spectral slicing X-ray telescope with variable magnification [PDF]

, 1985
A telescope for viewing high frequency radiation (soft X-ray, extreme ultraviolet) is described. This telescope has a long focal length with a selection of magnifications despite a short housing.
Hildner, E., Hoover, R. B.
core   +1 more source

Determining Exciton Diffusion Length in Organic Semiconductors: Unifying Macro‐ and Microscopic Perspectives

Advanced Energy Materials, EarlyView.
Exciton diffusion length in organic semiconductor films is determined from encounter/annihilation rates. Non‐normalized exciton densities and proper intrinsic lifetime reference avoid over‐parametrization of the fits. Monte Carlo Simulation of individual molecule‐to‐molecule hops reproduce these results (②) when matching lattice constant and hoping ...
Wenchao Yang, Catherine S. Pursglove De Castro, Safakath Karuthedath, Yuliar Firdaus, Nisreen Alshehri, Si Chen, Diego Rosas Villalva, Christopher E. Petoukhoff, Amr Dahman, Derya Baran, Thomas D. Anthopoulos, Frédéric Laquai, Julien Gorenflot   +12 more
wiley   +1 more source

Cosmology with the Roman Space Telescope: synergies with the Rubin Observatory Legacy Survey of Space and Time [PDF]

, 2021
T. F. Eifler, Melanie Simet, E. Krause, Christopher M. Hirata, Hung-Jin Huang, Xiao Fang, Vivian Miranda, Rachel Mandelbaum, C. Doux, Chen Heinrich, Eric Huff, Hironao Miyatake, Shoubaneh Hemmati, Jiachuan Xu, P. Rogozenski, P. Capak, A. Choi, Olivier Doré, Bhuvnesh Jain, Mike Jarvis, J. W. Kruk, N. MacCrann, Dan Masters, Eduardo Rozo, David N. Spergel, M. A. Troxel, Anja von der Linden, Yun Wang, David H. Weinberg, Lukas Wenzl, Hao‐Yi Wu   +30 more
openalex   +1 more source