Results 181 to 190 of about 11,866 (295)

High-Precision Time Synchronization and Autonomous Maintenance for LEO Satellite Constellations Based on High-Stability Crystal Oscillators. [PDF]

Sensors (Basel)
Mu L, Hu X, Wu M, Li J.
europepmc   +1 more source

Verification of Ground Station Diversity for Direct Optical TTC-Downlinks from LEO Satellites by means of an Experimental Laser Source

, 2010
Most of today's satellites make use of microwave data-links for their TTC-downlinks. However, these data-links are limited in terms of achievable data-rate and spectrum availability.
Fuchs, Christian, Giggenbach, Dirk, Brechtelsbauer, Martin   +2 more
core  

Oxygen‐Driven Structural Reorganization by Trace Water Enabling Fast Li‐Ion Transport in a Pliable Solid Electrolyte

Advanced Energy Materials, EarlyView.
Trace water is acting as a constructive mediator in 2LiCl–GaF3, markedly increasing ionic conductivity while reorganizing local coordination. Hydration creates localized Li+ solvation environments and partially dissociates ion pairs, enhancing Li‐ion mobility.
Youngkyung Kim, Jae‐Seung Kim, Kwang Ho Shin, Jingyu Choi, Beom Jin Park, Jinyeong Choe, Jiwon Seo, Chanhyun Park, Jeongjae Lee, Dong‐Hwa Seo, Sung‐Kyun Jung   +10 more
wiley   +1 more source

Statistical CSI-Based Beamspace Transmission for Massive MIMO LEO Satellite Communications. [PDF]

Entropy (Basel)
Dong Q, Wang Y, Hu N, Zhu Y, Wang W, Chai L.   +5 more
europepmc   +1 more source

ROUTING IN LEO-BASED SATELLITE NETWORKS

, 2008
- Several strategies have been proposed for routing in a low earth orbit (LEO) satellite system. Some of them are based on the Internet Protocol (IP) and a few on asynchronous transfer mode (ATM) switching. However, issues like memory requirements of the
Vidyashankar V Gounder, Hosame Abu-amara, Ravi Prakash   +2 more
core  

Rational Backbone Planarization for Doping‐Resilient Polymeric Hole Transport Materials Toward Stable and Scalable Perovskite Solar Cells

Advanced Energy Materials, EarlyView.
Incorporating divinylbenzene into PTAA‐based copolymers induces backbone planarization and promotes polaron delocalization, leading to enhanced doping resilience and stabilized electronic structure. The resulting hole‐transport material, PDVB14, maintains robust performance under high dopant concentrations and prolonged device operation, offering a ...
Chanhyeok Kim, Seung Un Ryu, Du Hyeon Ryu, Hangyeol Kim, Jeongsu Kim, Dohyun Kim, Junwoo Lee, Kyeong‐Jun Jeong, Chang Eun Song, Sung Yun Son, Minjun Kim   +10 more
wiley   +1 more source

Polyaniline nano-material backed lens antenna for X-band LEO satellite transceivers. [PDF]

Sci Rep
Abuklill H, Hussein KFA, Shaalan AA, Nasr ME, Elshaer AM.   +4 more
europepmc   +1 more source

Alcohol‐Adduct Mediated Precursor Stabilization Strategies for Conformal SnO2 Layers in Highly Efficient and Stable Perovskite Solar Modules

Advanced Energy Materials, EarlyView.
An alcohol‐adduct‐mediated strategy is employed to stabilize tin isopropoxide for the formation of a homogeneous double electron transport layer (ETL) incorporating SnO2 nanoparticles (NPs). This double‐ETL exhibits improved optical and charge‐transport properties due to reduced defect density and better energy level alignment, resulting in high ...
You‐Hyun Seo, Eun Young Park, Chan Su Moon, Dong Gyu Lee, Junho Park, Fabian Rotermund, Gill Sang Han, Tae Kyung Lee, Nam Joong Jeon, Bong Joo Kang, Young Yun Kim   +10 more
wiley   +1 more source

A Multi-Constraint Co-Optimization LQG Frequency Steering Method for LEO Satellite Oscillators. [PDF]

Sensors (Basel)
Wang D, Liao W, Liu B, Yu Q.
europepmc   +1 more source

Emerging Materials and Future Strategies for Solid Oxide Electrochemical Cells

Advanced Energy Materials, EarlyView.
Solid oxide electrochemical cells operate under strongly coupled electrochemical and thermodynamic conditions, where performance is constrained by interactions among crystal structure, defect chemistry, and interfacial evolution. This review, based on a structure‐defect‐property‐durability framework, reveals the roles of lattice symmetry and defect ...
Qiuchun Lu, Yufei Zhang, Han Zhao, Pooi See Lee, Daniel H.C. Chua   +4 more
wiley   +1 more source