Results 111 to 120 of about 11,866 (295)

Spaceborne Autonomous and Ground Based Relative Orbit Control for the TerraSAR-X/TanDEM-X Formation

, 2007
TerraSAR-X (TSX) and TanDEM-X (TDX) are two advanced synthetic aperture radar (SAR) satellites flying in formation. SAR interferometry allows a high resolution imaging of the Earth by processing SAR images obtained from two slightly different orbits. TSX
Gill, Eberhard, Ardaens, J. S., Kazeminejad, Bobby, Montenbruck, O., Ardaens, Jean-Sebastien, D'Amico, Simone, Montenbruck, Oliver, D'Amico, S., Gill, E., Kazeminejad, B.   +9 more
core  

Engineering of Crystal and Domain Structures in Epitaxial Y:HfO2 Thin Films by YSZ Substrate Miscut

Advanced Science, EarlyView.
We investigate how YSZ substrate miscut influences crystal structure and domain formation in epitaxial Y‐doped HfO2 thin films. Using magnetron sputtering, high‐resolution X‐ray diffraction, atomic‐resolution scanning transmission electron microscopy, and first‐principles calculations, we systematically examine the characteristics of thickness‐ and ...
Jun Young Lee, Hyung‐Jin Choi, Kun Hee Ye, Haneul Choi, Byeong‐hyeon Lee, Min‐Seok Kim, Dong‐Hun Han, June Hyuk Lee, Sung Ok Won, Tae Heon Kim, Hye Jung Chang, Jung‐Hae Choi, Seung‐Hyub Baek   +12 more
wiley   +1 more source

ROS‐Responsive Nanobubbles for Dual‐Enhanced Ultrasound and Magnetic Resonance Imaging of Tumor Oxidative Stress

Advanced Science, EarlyView.
We report the development of biotinylated PEGylated bilirubin‐coated perfluoropentane (bt‐PEG‐BR@PFP) nanobubbles, a novel class of ROS‐activatable and dual‐modality contrast agents that amplify both ultrasound (US) and magnetic resonance imaging (MRI) signals in response to elevated ROS.
Wonsik Jung, Youngju Son, Dong Yun Lee, Youngeun Jeon, Muhammad Asaddudin, Sung‐Hong Park, Sangyong Jon   +6 more
wiley   +1 more source

Supporting IP/LEO Satellite Networks by Handovers

, 2004
— Low Earth Orbit (LEO) satellite networks are capable of providing wireless connectivity to any part of the world while guaranteeing short propagation delays.
Hiroshi Tsunoda, Kohei Ohta, Yoshiaki Nemoto Member, Nei Kato Member   +3 more
core  

Ultrathin Quasi‐2D Perovskite‐Organic Segregated‐Structure Coupling for High‐Performance Narrowband Photomultiplication Detectors

Advanced Science, EarlyView.
Quasi‐2D perovskite‐organic segregated‐structure coupling enables low‐power narrowband photomultiplication photodetectors with 110 nm perovskite layer. The optimal device achieves 1200% EQE and 1.82 × 1011 Jones D* at 3 V, offering a new strategy for miniaturized high‐selectivity optoelectronic sensing.
Hongfei Qu, Peng He, Xingchao Zhao, Yongchao Xie, Fulong Huang, Xiaoling Ma, Byung Hui Lee, Han Young Woo, Yumeng Shi, Zuliang Zhuo, Fujun Zhang, Xixiang Zhu   +11 more
wiley   +1 more source

Computation Offloading and Resource Allocation Based on P-DQN in LEO Satellite Edge Networks. [PDF]

Sensors (Basel), 2023
Yang X, Fang H, Gao Y, Wang X, Wang K, Liu Z.   +5 more
europepmc   +1 more source

Estimation of LEO Satellite Channels

, 1997
In this paper, we propose a new channel estimation algorithm for low earth orbit satellite digital communications. Low earth orbit satellite channels impart severe spreading in delay and Doppler on the transmitted signal. We model the channel as a tapped-
Iain B. Collings, Linda M. Davis, Robin J. Evans   +2 more
core  

Electrochemically Induced Interphase by Complex Hydride Anions in Argyrodite Solid Electrolytes for Stable Lithium Metal All‐Solid‐State Batteries

Advanced Science, EarlyView.
Complex hydride anion substitution in argyrodite electrolytes has attracted attention for improving interfacial stability, yet the influence of these anions at Li metal interfaces remains unclear. This work shows that electrochemically formed BH4−‐derived interphases enable stable high‐current full‐cell cycling.
Sangho Lee, Hyunseo Park, Ye‐Eun Park, Taehyun Kim, Taegyoung Lee, Taeseung Kim, SeoungJae Kang, Yerim Chae, Seunghee Joo, Jinkwang Hwang, Kyungsu Kim, Kazuhiko Matsumoto, Woosuk Cho, Sangryun Kim   +13 more
wiley   +1 more source

Research on distributed time synchronization methods for LEO communication constellations based on maximum likelihood estimation

Dianxin kexue
As the rapid deployment of low earth orbit (LEO) mega-constellations and the swift growth of satellite Internet unfolds, distributed satellite systems composed of a large number of LEO satellites become a significant feature of the space-air-ground ...
YAN Bing, ZHAO Yafei, FANG Yiming, PENG Mugen, LIN Guangrong   +4 more
doaj   +2 more sources

Distributed Detour Routing Scheme for Link Failure with Minimized Overhead in LEO Satellite Networks. [PDF]

Sensors (Basel), 2023
Im J, Youn J, Kim S, Park J, Lee S, Kwon Y, Cho S.   +6 more
europepmc   +1 more source