Results 91 to 100 of about 237,970 (294)

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source

Study on remote sensing satellites random access to internet constellation and on-orbit intelligent processing

Dianxin kexue, 2022
The low earth orbit (LEO) satellite Internet constellation is a hot spot in current global research.And it is highly anticipated that the LEO satellite Internet constellation supports random access to remote sensing satellites and direct on-orbit ...
Xiaoyu CHANG, Weijia ZHANG, Xudong1 LI, Xiaonan ZHANG, Gang WANG, Gang JIA   +5 more
doaj   +2 more sources

Analysis of Satellite Internet Security Risks and Countermeasures

天地一体化信息网络
This paper was commenced with an exploration of the system composition and security events of satellite Internet, conducted a comprehensive assessment of risks associated with entities such as satellites, terminals, ground stations, mission control, and ...
Xin GU, Chao SHAN, Caijun SUN, Ke LI, Min TIAN, Ruiqing WANG   +5 more
doaj  

Research on Access Authentication and Re-Authentication Mechanism of User Devices in Terrestrial Default Scenario in Satellite Internet

天地一体化信息网络, 2023
For the current user device access authentication mechanism requires ground participation to bring about large communication delays and poor scalability, a user device access authentication and re-authentication protocol in the ground default scenario in
Qiuyu BU, Jin CAO, Lifu CHENG, Ruhui MA, Hui LI   +4 more
doaj  

CREATION OF THE ARCHITECTURE OF "DISTRIBUTED SATELLITE" FOR LOW-ORBITAL INFORMATION-TELECOMMUNICATION SYSTEMS BASED ON THE GROUPING OF MICRO AND NANO SATELLITES

Авіаційно-космічна техніка та технологія, 2018
Presented are the results of an analysis of the growing interest in the use of low Earth orbits (up to 1500 km high) for the introduction and development of the Internet of things (Internet of Things - IoT).
Михаил Ефимович Ильченко, Теодор Николаевич Нарытник, Борис Михайлович Рассамакин, Владимир Ильич Присяжный, Сергей Владимирович Капштык   +4 more
doaj   +1 more source

What's Going on in Community Media [PDF]

, 2007
What's Going On in Community Media shines a spotlight on media practices that increase citizen participation in media production, governance, and policy.
Fred Johnson, Karen Menichelli
core  

2D Co‐Mo‐Hydroxide‐Based Multifunctional Material for the Development of H2‐Based Clean Energy Technologies

Advanced Materials, EarlyView.
2D α‐Co(OH)2 interleaved with Mo species displays an appealing dual functionality for the production and use of green hydrogen.Mo incorporation greatly benefits the electrochemical behaviour in Oxygen Evolution Reaction for H2 production, while the magnetocaloric response at liquid H2 temperature paves the way for alternative cryogenic refrigerants ...
Daniel Muñoz‐Gil, Celia Castillo‐Blas, Dawid Krystian Feler, Isabel Gómez‐Recio, Miguel Tinoco, Ana Querejeta‐Fernández, Rodrigo González‐Prieto, Felipe Gándara, Romualdo Santos Silva Jr, Pilar Ferrer, Carlos Prieto, Luc Lajaunie, José Luis Martinez‐Peña, María Luisa Ruiz‐González, José María González‐Calbet   +14 more
wiley   +1 more source

Design of Satellite Internet Defense System Based on Mobile Target Defense

天地一体化信息网络
While satellite Internet promote information inter connectivity, they also raise increasingly complex security issues. This article introduced mobile target defense as proactive defense measure into the cyber protection of satellite Internet. By changing
XU Ruirong
doaj  

Large Scale LEO Satellite Internet Routing Algorithm Based on Load Balancing

天地一体化信息网络, 2022
The expanding market demand has set off an upsurge of large-scale LEO constellation deployment.With the characteristics of large bandwidth, low delay and continuous coverage, it provides broadband internet services for users all over the world.Aiming at ...
Yijie WANG, Wei ZHAO, Fei CHENG, Wen CHEN, Anjie CAO   +4 more
doaj  

Wireless communication, identification and sensing technologies enabling integrated logistics: a study in the harbor environment [PDF]

, 2015
In the last decade, integrated logistics has become an important challenge in the development of wireless communication, identification and sensing technology, due to the growing complexity of logistics processes and the increasing demand for adapting ...
Celandroni, Nedo, Cimino, Mario G. C. A., Ferro, Erina, La Rosa, Davide, Palumbo, Filippo, Vaglini, Gigliola   +5 more
core   +1 more source