Results 41 to 50 of about 414,153 (280)

The 50 cm telescope of Hoa Lac observatory: an introduction

Vietnam Journal of Science, Technology and Engineering, 2022
The Vietnam National Space Center has recently established an observatory in Hoa Lac, near Ha Noi. The observatory is equipped with a 50 cm diameter Ritchey-Chrétien optical telescope.
Nguyen Thi Thao, Mai Thuy Dung, Pham Vu Loc, Nguyen Thi Kim Ha, Pham Ngoc Diep, Pierre Darriulat   +5 more
doaj   +1 more source

2D Nanomaterials Toward Function‐Ready Superlubricity in Advanced Microsystems

Advanced Materials, EarlyView.
A unified framework links structural and transformation superlubricity with microsystem functions and deployment requirements. Mechanisms, device architectures, integration strategies, AI‐guided discovery, and benchmarking protocols are connected to define function‐ready superlubricity in advanced microsystems.
Yushan Geng, Jun Yang, Yong Yang
wiley   +1 more source

Temporal Variations of the Turbulence Profiles at the Sayan Solar Observatory Site

Atmosphere, 2019
The paper focuses on the development of the method to estimate the mean characteristics of the atmospheric turbulence. Using an approach based on the shape of the energy spectrum of atmospheric turbulence over a wide range of spatial and temporal scales,
Artem Shikhovtsev, Pavel Kovadlo, Vladimir Lukin   +2 more
doaj   +1 more source

Multi-wavelength visibility measurements of the red giant R Doradus [PDF]

, 2000
We present visibility measurements of the nearby Mira-like star R Doradus taken over a wide range of wavelengths (650--990 nm). The observations were made using MAPPIT (Masked APerture-Plane Interference Telescope), an interferometer operating at the 3.9-
Barton, J. R., Bedding, T. R., Haniff, C. A., Jacob, A. P., Marson, R. G., Robertson, J. G., Scholz, M.   +6 more
core   +2 more sources

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, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Experimental Investigations of Sigma Vectors in Nodal Aberration Theory for Coma-Free Pivot Misalignment State of a Cassegrain Telescope

Gazi Üniversitesi Fen Bilimleri Dergisi
The study aims experimental investigation of the sigma vectors in Nodal Aberration Theory for a customized non-aplanatic high-precision Cassegrain telescope under coma-free pivot point (CFPP) misalignment conditions.
Meltem Yeşiltepe, Sefer Bora Lişesivdin   +1 more
doaj   +1 more source

A Short and Personal History of the Spitzer Space Telescope [PDF]

, 2005
The Spitzer Space Telescope, born as the Shuttle Infrared Telescope Facility (SIRTF) and later the Space Infrared Telescope Facility (still SIRTF), was under discussion and development within NASA and the scientific community for more than 30 years prior
Werner, Michael
core   +1 more source

CCAT-prime: a novel telescope for submillimeter astronomy

, 2018
The CCAT-prime telescope is a 6-meter aperture, crossed-Dragone telescope, designed for millimeter and sub-millimeter wavelength observations. It will be located at an altitude of 5600 meters, just below the summit of Cerro Chajnantor in the high Atacama
Bazarko, Andrew, Bertoldi, Frank, Blair, James, Bustos, Ricardo, Campbell, Donald B., Chapman, Scott, Cothard, Nicholas, Devlin, Mark, Erler, Jens, Fich, Michel, Gallardo, Patricio A., Giovanelli, Riccardo, Graf, Urs, Gramke, Scott, Haynes, Martha P., Herter, Terry, Hills, Richard, Kronshage, Jörg, Limon, Michele, Mangum, Jeffrey G., McMahon, Jeff, Niemack, Michael D., Nikola, Thomas, Nolta, Mike, Omlor, Markus, Parshley, Stephen C., Riechers, Dominik A., Stacey, Gordon J., Steeger, Karl, Stutzki, Jürgen, Vavagiakis, Eve M.   +30 more
core   +1 more source

Morphology‐Controlled Silica Nanoparticle Coatings for Transparent Radiative Cooling

Advanced Materials Interfaces, EarlyView.
Transparent radiative cooling coatings are achieved by immobilizing solid and hollow silica spheres on glass. Particle morphology within sub‐monolayer coatings is shown to govern the trade‐off between visible and atmospheric window reflectance. Hollow‐sphere structures enable reduced thermal emission losses while preserving transparency, highlighting ...
Jefferson A. S. Lam, Kishin Matsumori, Maximillian Theis, Alexander Berger, Nicole Böller, Qimeng Song, Matthieu Gresil, Jacek J. Jasieniak, Markus Retsch   +8 more
wiley   +1 more source

Project of the Large Solar Telescope with mirror 3 m in diameter

Solar-Terrestrial Physics, 2020
One of the most important problems of modern solar physics is the observation of the small-scale structure of the solar atmosphere at various heights (including the chromosphere and corona) in different spectral lines.
Grigoryev V.M., Demidov M.L., Kolobov D.Yu., Pulyaev V.A., Skomorovsky V.I., Chuprakov S.A.   +5 more
doaj   +1 more source