Results 41 to 50 of about 993,247 (318)

Variants of the low oxygen sensors EGLN1 and HIF-1AN associated with acute mountain sickness. [PDF]

, 2014
Two low oxygen sensors, Egl nine homolog 1 (EGLN1) and hypoxia-inducible factor 1-α inhibitor (HIF-1AN), play pivotal roles in the regulation of HIF-1α, and high altitude adaption may be involved in the pathology of acute mountain sickness (AMS).
Huang, Lan, Jin, Jun, Li, Huijie, Qin, Jun, Zhang, Enhao, Zhang, Jihang   +5 more
core   +3 more sources

A New Strategy for Deep Wide-Field High Resolution Optical Imaging [PDF]

, 1999
We propose a new strategy for obtaining enhanced resolution (FWHM = 0.12 arcsec) deep optical images over a wide field of view. As is well known, this type of image quality can be obtained in principle simply by fast guiding on a small (D = 1.5m ...
Avila R., Barletti R., Barletti R., Chassat F., Coulman C. E., Coulman C. E., Cowie L. L., Disney M. J., Foy R., Fried D. L., Fried D. L., G. A. Luppino, J. L. Tonry, Jannuzi B. T., Johnston D. C., Martin F., N. Kaiser, Rocca A., Roddier F., Roddier F., Vernin J., Yee H. K. C.   +21 more
core   +2 more sources

Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2 [PDF]

, 2016
The thermal infrared imager TIR onboard Hayabusa2 has been developed to investigate thermo-physical properties of C-type, near-Earth asteroid 162173 Ryugu.
A. Fujiwara, Axel Hagermann, D.A. Paige, F. Vilas, G.J. Consolmagno, H. Hiesinger, H. Hihara, H. Yano, H.H. Kieffer, H.H. Kieffer, Hirohide Demura, Hiroki Senshu, J. Biele, J. Helbert, J. Veverka, Jun Takita, Jörn Helbert, Ken Endo, Kohei Kitazato, M. Delbo, M. Grott, M. Ishiguro, M.P. Golombek, Makoto Taguchi, Naoya Sakatani, O. Groussin, P. Michel, P.R. Christensen, P.R. Christensen, Ryosuke Nakamura, S. Tachibana, S.C. Chase, Satoshi Tanaka, Sunao Hasegawa, T. Fukuhara, T. Okada, T. Okada, T. Spohn, T.-M. Ho, T.G. Müller, Takehiko Arai, Takehiko Wada, Takeshi Imamura, Tatsuaki Okada, Tetsuya Fukuhara, Thomas G. Müller, Tomohiko Sekiguchi, Toru Kouyama, Tsuneo Matsunaga, W.F. Bottke Jr., Y. Tsuda, Yamato Horikawa, Yoshiko Ogawa   +52 more
core   +2 more sources

Hohmann spiral transfer with inclination change performed by low-thrust system [PDF]

, 2013
This paper investigates the Hohmann Spiral Transfer (HST), an orbit transfer method previously developed by the authors incorporating both high and low-thrust propulsion systems, using the low-thrust system to perform an inclination change as well as ...
Macdonald, Malcolm, Owens, Steven Robert
core  

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

OFF-AXIS TARGET ILLUMINATION IN RADAR OVER-SEA TRACKING USING AN ACTIVE PHASED ARRAY ANTENNA [PDF]

Radio Physics and Radio Astronomy
Subject and Purpose. Th is paper addresses the challenge of measuring the angular coordinates of over-sea low-altitude targets and strives to improve the measurement accuracy of radar systems that employ high-resolution algorithms implemented through ...
Yu. F. Logvinov, Yu. O. Pedenko, O. V. Bukin   +2 more
doaj   +1 more source

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

Advanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz, Lukas E. Lehner, Stepan Demchyshyn, Bekele Hailegnaw, Phillip Jahelka, Magdalena Breitwieser, Sercan Özen, Andrea Denker, Jürgen Bundesmann, Alina Hanna Dittwald, Dilara Karabulut, Philipp Tockhorn, Steve Albrecht, Felix Lang, Markus C. Scharber, Michael D. Kelzenberg, Harry A. Atwater, Martin Kaltenbrunner   +17 more
wiley   +1 more source

The DOA Estimation Method for Low-Altitude Targets under the Background of Impulse Noise

Sensors, 2022
Due to the discontinuity of ocean waves and mountains, there are often multipath propagation effects and obvious pulse characteristics in low-altitude detection. If the conventional direction of arrival (DOA) estimation method is directly used for direction finding, it will lead to a large error. In view of serious misalignment in the DOA estimation of
Bin Lin, Guoping Hu, Hao Zhou 0019, Guimei Zheng, Yuwei Song   +4 more
openaire   +3 more sources

Autonomous control of a reconfigurable constellation of satellites on geostationary orbit with artificial potential fields [PDF]

, 2012
This paper presents a method of controlling a constellation of small satellites in Geostationary Earth Orbit (GEO) such that the constellation is able to reconfigure - changing the angular position of its members relative to the Earth’s surface in order ...
Colombo, Camilla, McInnes, Colin, Mushet, Garrie   +2 more
core  

Autonomous take-off and landing of a tethered aircraft: a simulation study

, 2015
The problem of autonomous launch and landing of a tethered rigid aircraft for airborne wind energy generation is addressed. The system operates with ground-based power conversion and pumping cycles, where the tether is repeatedly reeled in and out of a ...
Fagiano, Lorenzo, Schnez, Stephan, Van, Eric Nguyen   +2 more
core   +1 more source