Results 61 to 70 of about 9,572,770 (273)

Photo‐Switchable Molecular Module Programming PET Biodegradation in Aquatic Environments

Advanced Functional Materials, EarlyView.
We address the plastic durability paradox by integrating an itaconic acid–derived pyrrolidone module into polymer backbones. Sunlight in water triggers Norrish Type I ring‐opening and hydrophilization, enabling rapid biodegradation into nontoxic minerals.
Mohammad Asif Ali, Jixin Zheng, Satoshi Wakai, Jie Liu, Hidetaka Nomaki, Misato Tsukatani, Noriyuki Isobe, Jingcheng Sang, Yuriko Aoki, Hideo Okamura, Daisuke Sasaki, Chiaki Ogino, Yuzo Yamazaki, Takashi Nishikaze, Kenji Takada, Maiko K. Okajima, Tatsuo Kaneko   +16 more
wiley   +1 more source

Extension of the Molniya orbit using low-thrust propulsion [PDF]

, 2011
Extension of the standard Molniya orbit using low-thrust propulsion is presented. These newly proposed, highly elliptical orbits are enabled by existing low-thrust propulsion technology, enabling new Earth Observation science and offering a new set of ...
Macdonald, Malcolm, Anderson, Pamela
core   +3 more sources

Model Predictive Control Based on Intelligent Model for Low Earth Orbit Satellite [PDF]

فناوری در مهندسی هوافضا, 2021
In this paper, an orbit control algorithm is implemented for low earth orbit (LEO) satellites, using artificial neural networks (ANN), model-based predictive control (MPC), and linear quadratic regulator (LQR).
Taha Yasini, Jafar Roshanian, Shahin Darvishpour   +2 more
doaj  

Implementation of A Low-Earth Orbit Satellite Chirped Preamble Detector

IEEE Transactions on Aerospace and Electronic Systems
The Internet of Things (IoT) has undergone a significant transformation with the introduction of low-Earth orbit (LEO) satellites as gateways. This transformation fulfills a long-standing promise of IoT, which is to enable the connectivity of objects regardless of their geographical location on Earth.
Matthieu Magnant, Bertrand Le Gal, Guillaume Ferré, Florian Collard   +3 more
openaire   +2 more sources

Architecture‐Driven Functional Coupling in Vertically Aligned Nanocomposites

Advanced Functional Materials, EarlyView.
Vertically aligned nanocomposites define a growth‐engineered architecture in which vertical interfaces, strain fields, defect pathways, and phase connectivity are created simultaneously. This review shows how these architectural features couple ferroic, optical, ionic, electrochemical, and device responses, establishing design rules and open challenges
Md Shatil Islam‐Shanto, Javier Zamudio‐García, Abraham Sánchez‐Caballero, David Marrero‐López, Vincenzo Esposito   +4 more
wiley   +1 more source

Passive Radar Using LEO Communication Satellite Signals: An Overview and Prospect

Leida xuebao
Compared to ground-based external radiation source radar, satellite signal-based external radiation source radar (i.e., satellite signal external radiation source radar) offers advantages such as global, all-time, and all-weather coverage, which can ...
Hongwei FU, Zhang ZHANG, Yu LUO, Zhichao ZHOU, Zhanye CHEN, Xin JIAN, Hao CHA   +6 more
doaj   +1 more source

Desert Plant Inspired Hierarchical Nanofibrous Membranes for Integrated Solar Desalination and Heavy Metal Remediation

Advanced Functional Materials, EarlyView.
An Alhagi maurorum inspired hierarchical composite membrane (NFCu) was developed by integrating heavy metal remediation and solar‐driven interfacial evaporation in a single platform. Beyond the photothermal effect, a localized photocatalytic process is realized on the CuO surface, deepening the mechanistic understanding of light–matter–water ...
Yuqiong He, Ronggang Luo, Shengbo Ge, Kaixin Jiang, Kirsten Dyer, Xiaojian Zhou, Ben Bin Xu, Xuehua Zhang, Guanben Du, Kaimeng Xu   +9 more
wiley   +1 more source

First In-orbit Experience of TerraSAR-X Flight Dynamics Operations [PDF]

, 2007
TerraSAR-X is an advanced synthetic aperture radar satellite system for scientific and commercial applications that is realized in a public-private partnership between the German Aerospace Center (DLR) and the Astrium GmbH.
Kiehling, Reinhard, Kirschner, M., Kazeminejad, Bobby, Kiehling, R., Yoon, Y., Kirschner, Michael, Kahle, Ralph, D'Amico, Simone, D'Amico, S., Kahle, R., Kazeminejad, B., Yoon, Yoke   +11 more
core  

Decoupling the Size and Loading Effects in Silver Nanoparticles for Efficient Paired Carbon Dioxide and Formaldehyde Electrolysis

Advanced Functional Materials, EarlyView.
We investigate size‐dependent CO selectivity on Ag nanoparticles, where optimized Ag loading achieves nearly 100% Faradaic Efficiency for CO at −100 mA·cm−2. In situ SERS and XPS reveal the crucial role of optimized loading in catalytic performance. The Ag/C catalyst further exhibits bifunctional activity, enabling efficient electrolysis of CO2 and ...
Venkata S. R. K. Tandava, Clara Große, Debabrata Bagchi, Zhenye Zhu, Suptish Ghosh, J. Niklas Hausmann, Carsten Walter, Rosario Suarez Anzorena, Catalina Elena Jimenez, Yasmin Lucero Cobos‐Becerra, Jack C. Q. Fletcher, Tobias Sontheimer, Michael Schwarze, Holger Dau, Matthias Driess, Marcus Bär, Prashanth W. Menezes   +16 more
wiley   +1 more source

Coverage Analysis of LEO Satellite Downlink Networks: Orbital Geometry Dependent Approach

IEEE Access
The low-Earth-orbit (LEO) satellite network has emerged as a promising technology for providing global coverage with high data rates. However, analyzing the performance of the LEO satellite network is particularly challenging due to its dependence on ...
Junse Lee, Song Noh, Sooyeob Jung, Namyoon Lee   +3 more
doaj   +1 more source