Results 71 to 80 of about 3,008 (290)
, 2021 The precise orbit determination (POD) accuracy of the Chinese BeiDou Navigation Satellite System (BDS) is still not comparable to that of the Global Positioning System because of the unfavorable geometry of the BDS and the uneven distribution of BDS ...
Fan Gao +6 more
core +1 more source
Advanced Functional Materials, EarlyView.Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu +17 more
wiley +1 more source
Extended Geometry and Probability Model for GNSS+ Constellation Performance Evaluation
Remote Sensing, 2020 We proposed an extended geometry and probability model (EGAPM) to analyze the performance of various kinds of (Global Navigation Satellite System) GNSS+ constellation design scenarios in terms of satellite visibility and dilution of precision (DOP) et al.
Lingdong Meng +4 more
doaj +1 more source
APLIKASI KONSTELASI LEO UNTUK SISTEM KOMUNIKASI REGIONAL
, 2005 Abstrak Konstelasi satelit LEO dimaksudkan untuk menyediakan komunikasi suara real-time ke pengguna pengguna hand-held dan mobile secara global, tetapi secara teknik sangat sulit dan secara .finansial sangat mahal. Konstelasi delapan mikrosat menyediakan
Iwan Faizal
core
Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films
Advanced Functional Materials, EarlyView.Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee +5 more
wiley +1 more source
On an Ultra-Dense LEO-Satellite-Based Computing Network Constellation Design
EngineeringCommercial ultra-dense low-Earth-orbit (LEO) satellite constellations have recently been deployed to provide seamless global Internet services. To improve the satellite network transmission efficiency and provide robust wide-coverage computing services ...
Yijing Sun +3 more
doaj +1 more source
BAVP: Blockchain-Based Access Verification Protocol in LEO Constellation Using IBE Keys
, 2018 LEO constellation has received intensive research attention in the field of satellite communication. The existing centralized authentication protocols traditionally used for MEO/GEO satellite networks cannot accommodate LEO satellites with frequent user ...
Shuai Li +3 more
core +1 more source
Advanced Functional Materials, EarlyView.A compostable PGS soft surgical robot with interchangeable modules integrates transient Mo tactile and Si thermal sensors for dual feedback. The device preserves its function after clinical‐grade sterilization, demonstrates stable actuation and cardiac tissue grasping with real‐time in vivo pulsatile monitoring, and biodegrades post‐use with soil‐safe,
Minseong Chae +27 more
wiley +1 more source
On the future NanoMagSat LEO nanosatellite constellation observations of space environment
, 2023 International audienceThe NanoMagSat project aims to deploy and operate a new constellation concept of three identical 16U gravitygradient stabilized nanosatellites with no propulsion but stable enough attitude control, using two inclined (~ 60°) and one
Duchêne, Robin +7 more
core +1 more source
Debris Survivability Study for Mega-Constellation Architectures
, 2023 The analysis for the overall theoretical debris survivabilty of mega-constellation architectures, with an emphasis on space-based ballistic missile defense constellation (SB-BMD), is explored via three extensive different Monte Carlo simulations ...
Canoy, Joseph C.
core