Results 181 to 190 of about 11,557,211 (324)

Geometric Characterization of LEO–GEO Inter‐Satellite Links for Bidirectional Communications

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Incorporating geosynchronous Earth orbit (GEO) and low Earth orbit (LEO) satellites can extend communication services far beyond the reach of terrestrial infrastructure. A key enabler of such architectures is the establishment of inter‐satellite links (ISLs) between LEOs and GEOs to support bidirectional communications.
Muhammad Furqan, Lingfeng Ye, Yanming Feng   +2 more
wiley   +1 more source

Climate change scenarios across South-Kivu agroecological zones, Eastern D.R. Congo. [PDF]

Sci Rep
Kulimushi LC, Mondo JM, Bashagaluke JB, Bisimwa AHK, Balezi AZ, Rashid IU, Prasad P, Majaliwa JM, Singh SK, Kahindo C, Almazroui M, Karume K.   +11 more
europepmc   +1 more source

Simulation of the seeding of equatorial spread F by circular gravity waves

, 2013
J. Krall, J. Huba, G. Joyce, Matthew A. Hei   +3 more
semanticscholar   +1 more source

Routing and Downlink Resource Allocation for Multicast Traffic in LEO Satellite Constellations

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT In this work, we optimize unicast and multicast traffic delivery over non‐terrestrial networks (NTNs) to users on the ground through direct satellite downlink (DL). We consider a gateway‐free mesh architecture with low Earth orbit (LEO) satellites interconnected via inter‐satellite links (ISLs), where unicast and multicast services compete for
Federico Lozano‐Cuadra, Israel Leyva‐Mayorga, Jimmy Jessen Nielsen, Beatriz Soret   +3 more
wiley   +1 more source

North Pacific meridional mode has larger impacts on El Niño evolution than the March Madden-Julian Oscillation. [PDF]

Sci Adv
Liang Y, Xie SP, Fedorov A, Yeager SG.
europepmc   +1 more source

The role of the F-region vertical drift on the onset time of the equatorial spread F over Ilorin, Nigeria

Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 2019
O. Oladipo, J. Adeniyi, I. Adimula, A. Olawepo, A. Olowookere, F. Salifu, S. Radicella, B. Reinisch   +7 more
semanticscholar   +1 more source

Mapping School Accessibility in Africa: High‐Resolution Spatial Analysis Uncovers Inequalities in Education Access

Sustainable Development, EarlyView.
ABSTRACT Education is a cornerstone of sustainable development, yet large disparities in access persist across and within countries—particularly in Africa, where millions remain underserved. Among several factors influencing educational participation, physical accessibility to schools (in terms of travel time) is not comprehensively understood ...
Diana Jaramillo‐Araujo, Jim W. Hall
wiley   +1 more source

Multiscale Modeling of Lytic Polysaccharide Monooxygenases in Oxidized and Reduced Redox States. [PDF]

J Phys Chem B
Szleper-Shendy K, Escorcia AM, Kumar R, Góra A, Stein M.   +4 more
europepmc   +1 more source

Energy Poverty and Climate Shocks: Are Changing Weather Patterns Leaving South Africa in the Dark?

Sustainable Development, EarlyView.
ABSTRACT Energy and climate change are deeply interlinked, with the latter exerting significant influence on energy demand and supply. In regions such as South Africa, where socio‐economic vulnerability is high, understanding how climate change affects energy poverty is essential to achieving the Sustainable Development Goals, particularly SDG 7 ...
WiZelle Kritzinger, Roula Inglesi‐Lotz
wiley   +1 more source

Robust intensification of projected regional precipitation extremes over Africa. [PDF]

Nat Commun
Akinsanola AA, Taguela TN, Bobde V.
europepmc   +1 more source