Results 61 to 70 of about 2,365 (260)
Algorithms for a Satellite Constellation scheduling Problem
2016 IEEE International Conference on Automation Science and Engineering (CASE), 2016 Remote sensing systems such as a constellation of satellites periodically observe regions on the surface of the earth to collect visual imagery and other sensory data that is both spatial and temporal. Efficiently scheduling sensing activities on a constellation of satellites is a natural problem that arises while managing these systems. Given a set of
Kaarthik Sundar +5 more
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Thermally Robust Spin–Orbit Torque Switching in Low‐Resistivity Mo‐Alloyed β‐W Heterostructures
Advanced Functional Materials, EarlyView.Mo‐alloyed β‐W heterostructures exhibit enhanced spin‐orbit torque efficiency, reduced resistivity and switching current density, and reliable operation from −50 to +150°C. The optimized W87.3Mo12.7 device achieves high spin Hall conductivity with thermal robustness, highlighting its potential for energy‐efficient magnetic memory and automotive ...
Han Seok Ko +7 more
wiley +1 more source
Modeling and Analysis of Staged Constellation Deployment from a Single-Unit System
AerospaceA novel satellite architecture and deployment method is proposed to reduce the logistical cost and complexity of launching and dispersing satellite constellations.
Daniel Cumbo, Marc Anthony Azzopardi
doaj +1 more source
Multiple agent-based autonomy for satellite constellations
Artificial Intelligence, 2000 AbstractMultiple, highly autonomous, satellite systems are envisioned in the near future because they are capable of higher performance, lower cost, better fault tolerance, reconfigurability and upgradability. This paper presents an architecture and multi-agent design and simulation environment that will enable agent-based multi-satellite systems to ...
Thomas P. Schetter +2 more
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Advanced Functional Materials, EarlyView.In this work, diamonds with negative charged silicon‐vacancy (SiV−) centers have been designed for use as thermometers in biomedical applications. Multiparametric analysis of the emission characteristics of the SiV− centers provides extraordinary sensitivity for temperature detection in the physiological temperature range.
María Gragera +6 more
wiley +1 more source
Bismuth‐Based Photocatalysts for Water Remediation: Design Strategies, Mechanisms, and Challenges
Advanced Functional Materials, EarlyView.This review highlights representative design strategies for bismuth‐based semiconductor photocatalysts in solar‐driven water purification. Emphasis is placed on electronic structure regulation, oxygen‐vacancy engineering, and interfacial coupling to enable efficient full‐spectrum light utilization, improved charge separation, and selective oxidation in
Shan Liu +9 more
wiley +1 more source
Mega LEO Satellite Constellations Networking: Challenges and Key Technologies
天地一体化信息网络Owing to the advances in satellite manufacturing and rocket launch technology, the deployment of mega LEO constellations has become an important direction for the development of satellite Internet.
SUN Yaohua, FENG Xinao, PENG Mugen
doaj
IEEE Open Journal of the Communications SocietyThe rapid expansion of the Internet of Things (IoT) highlights the need for ubiquitous connectivity, especially in remote and underserved areas. As a cornerstone of current 5th Generation (5G) cellular IoT networks, Narrowband IoT (NB-IoT) supports ...
Timo Kellermann +2 more
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Oligopoly competition between satellite constellations will reduce economic welfare from orbit use. [PDF]
Proc Natl Acad Sci U S A, 2023 Guyot J, Rao A, Rouillon S.
europepmc +1 more source
Catalytically Enhanced Near Room‐Temperature Hydrogen Sensing Using Pd‐ZnO Colloidal Crystals
Advanced Functional Materials, EarlyView.Pd‐decorated ZnO colloidal crystal monolayers demonstrate excellent performance across a wide hydrogen concentration range at 33°C, with high selectivity and reproducible device fabrication. The sensors show strong responses even at low‐ppm H2 concentrations and an ultra‐low detection limit of 82 ppb, indicating their suitability for diverse hydrogen ...
Hamidah Alluhaybi +13 more
wiley +1 more source