Results 71 to 80 of about 1,581,787 (389)

NORAD TLE Conversion from Osculating Orbital Element [PDF]

Journal of Astronomy and Space Sciences, 2002
The NORAD type Two Line Element (TLE) was obtained from the osculating orbital elements by an iterative approximation procedure. The mathematical model was presented and computer program was developed for the conversion.
Byoung-Sun Lee
doaj   +1 more source

Satellite communications for emergency [PDF]

2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012
This paper aims at defining the role of a satellite component in an integrated communications, localization and monitoring system, which can be used in all emergency management phases. Particular attention will be given to the integration of the satellite and terrestrial components and of the different functionalities.
openaire   +2 more sources

Generative AI Agents With Large Language Model for Satellite Networks via a Mixture of Experts Transmission [PDF]

IEEE Journal on Selected Areas in Communications
In response to the needs of 6G global communications, satellite communication networks have emerged as a key solution. However, the large-scale development of satellite communication networks is constrained by complex system models, whose modeling is ...
Ruichen Zhang, Hongyang Du, Yinqiu Liu, Dusist Niyato, Jiawen Kang, Zehui Xiong, Abbas Jamalipour, Dong In Kim   +7 more
semanticscholar   +1 more source

RoHS‐Compliant, Cu‐Zn‐In‐Se‐Based Core/Multi‐shell Quantum Dots with Efficient and Tunable Short‐Wave Infrared Emission

Advanced Functional Materials, EarlyView.
An innovative combination of size‐controlled template synthesis, partial cation exchange reactions, and dual shell passivation offers a new class of RoHS‐compliant, heavy metal‐free Cu‐Zn‐In‐Se/ZnS/Al2O3 core/shell/shell quantum dots (QDs), exhibiting long‐range tunability, highly efficient SWIR emission with remarkably narrow photoluminescence ...
Avijit Saha, Morena Cervino, Hossein Roshan, René Hübner, Angelika Wrzesińska‐Lashkova, Christine Steinbach, Yana Vaynzof, Francesco Di Stasio, Vladimir Lesnyak   +8 more
wiley   +1 more source

Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring

Journal of Electrical and Computer Engineering, 2010
This paper addresses the problem of recovering the code phase of the composite spreading sequence for a CDMA 1x signal transmitted from a handset, without the benefit of a priori information from the system.
Ron Kerr, John Lodge
doaj   +1 more source

Progressive Insights into 3D Bioprinting for Corneal Tissue Restoration

Advanced Healthcare Materials, EarlyView.
This review explores the potential of 3D bioprinting to replicate the complex structure and function of the human cornea. It highlights key advances in bioink development, printing modalities, and in vivo performance, while addressing current challenges and emerging strategies. The review emphasizes bioprinting's promise to overcome donor shortages and
Ilayda Namli, Deepak Gupta, Yogendra Pratap Singh, Pallab Datta, Muhammad Rizwan, Mehmet Baykara, Ibrahim T. Ozbolat   +6 more
wiley   +1 more source

Satellite communications for fighters [PDF]

Proceedings of MILCOM '93 - IEEE Military Communications Conference, 2002
WIth the demise of the Soviet Union, the threat to the US and its allies has changed. Instead of a single advisory and a defined theater of battle, US forces face worldwide deployment in support of peace keeping activities and regional conflicts. In the new world order, US Forces will require flexible, worldwide, jam-resistant, low-probability-of ...
openaire   +2 more sources

Challenges and Opportunities of Upconversion Nanoparticles for Emerging NIR Optoelectronic Devices

Advanced Materials, EarlyView.
The special photo‐responsiveness of upconversion nanoparticles has opened up a new path for the advancement of near‐infrared (NIR)‐responsive optoelectronics. However, challenges such as low energy‐conversion efficiency and high nonradiative losses still persist.
Sunyingyue Geng, Hangfei Li, Ziyu Lv, Yongbiao Zhai, Bobo Tian, Ying Luo, Ye Zhou, Su‐Ting Han   +7 more
wiley   +1 more source

OSIRIS4CubeSat—The World’s Smallest Commercially Available Laser Communication Terminal

Aerospace
The New Space movement led to an exponential increase in the number of the smallest satellites in orbit in the last two decades. The number of required communication channels increased with that as well and revealed the limitations of classical radio ...
Benjamin Rödiger, Christian Roubal, Fabian Rein, René Rüddenklau, Anil Morab Vishwanath, Christopher Schmidt   +5 more
doaj   +1 more source

Interactions Between Active Matters and Endogenous Fields

Advanced Materials, EarlyView.
This review synthesizes endogenous field information and computational methods in contexts such as cancer, wounds, and biofilms. It organizes NAMs and AAMs by sensing, transmitting, and executing functions, compares their limitations, and from these contrasts proposes design strategies for next‐generation AAMs, offering perspectives to foster ...
Jinwei Lin, Qiaoxin Guan, Jiangqi Feng, Shuqin Chen, Leilei Xu, Jianguo Guan, Samuel Sánchez   +6 more
wiley   +1 more source