Zobrazeno 1 - 10
of 11 079
pro vyhledávání: '"Okonkwo ON"'
Publikováno v:
Clinical Ophthalmology, Vol Volume 17, Pp 1531-1543 (2023)
Ogugua Ndubuisi Okonkwo,1 Chineze Thelma Agweye,2 Toyin Akanbi1 1Department of Ophthalmology, Eye Foundation Hospital and Eye Foundation Retina Institute, Ikeja, Lagos, Nigeria; 2Department of Ophthalmology, University of Calabar and University of Ca
Externí odkaz:
https://doaj.org/article/3257e028afb14a818f2ed12561ad1240
Publikováno v:
International Medical Case Reports Journal, Vol Volume 15, Pp 141-155 (2022)
Ogugua N Okonkwo,1,2 Toyin Akanbi,2 Chineze T Agweye3 1Eye Foundation Retina Institute, Lagos, Nigeria; 2Department of Ophthalmology, Eye Foundation Hospital, Abuja, Nigeria; 3Department of Ophthalmology, University of Calabar Teaching Hospital, Cala
Externí odkaz:
https://doaj.org/article/46df7f77a957447e938ff4636476d857
Autor:
Kalla, Besma, Cappelletti, Martina, Hout, Menno van den, van Vliet, Vincent, Rommel, Simon, Palmieri, Luca, Bradley, Thomas, Okonkwo, Chigo
We propose an optimized optical vector network analyzer with automatic polarization control to stabilize the reference arm polarization throughout the sweep range. We demonstrate this technique, successfully removing the polarization-induced fading a
Externí odkaz:
http://arxiv.org/abs/2410.06728
Autor:
Gümüş, Kadir, Frazão, João dos Reis, Albores-Mejia, Aaron, Škorić, Boris, Liga, Gabriele, Gültekin, Yunus Can, Bradley, Thomas, Alvarado, Alex, Okonkwo, Chigo
In this paper we introduce a reconciliation protocol with a two-step error correction scheme using a short blocklength low rate code and a long blocklength high rate code. We show that by using this two-step decoding method it is possible to achieve
Externí odkaz:
http://arxiv.org/abs/2409.13667
Autor:
Gümüş, Kadir, Frazão, João dos Reis, van Vliet, Vincent, van der Heide, Sjoerd, Hout, Menno van den, Liga, Gabriele, Gültekin, Yunus Can, Albores-Mejia, Aaron, Bradley, Thomas, Alvarado, Alex, Okonkwo, Chigo
Continuous-variable quantum key distribution (CV-QKD) has been proposed as a method for securely exchanging keys to protect against the security concerns caused by potential advancements in quantum computing. In addition to optical fiber transmission
Externí odkaz:
http://arxiv.org/abs/2408.12522
Publikováno v:
International Medical Case Reports Journal, Vol Volume 13, Pp 477-486 (2020)
Ogugua Ndubuisi Okonkwo,1,2 Dennis Sibanda,3 Toyin Akanbi,2 Adekunle Olubola Hassan1,2 1Department of Ophthalmology, Eye Foundation Retina Institute, Lagos, Lagos State, Nigeria; 2Ophthalmology Clinics, Eye Foundation Hospital, Apo, Abuja, Nigeria; 3
Externí odkaz:
https://doaj.org/article/df0e8675234d4eee91e4c31f8b67f1b6
Autor:
Frazão, João dos Reis, van Vliet, Vincent, Gümüş, Kadir, Hout, Menno van den, van der Heide, Sjoerd, Albores-Mejia, Aaron, Škorić, Boris, Okonkwo, Chigo
Real-time CV-QKD receiver achieves peak 2.9 Mbit/s secret-key-rates over 12.8 km of fiber, while co-propagating 15 classical channels, separated 1 nm from the quantum signal. Performance degrades at higher launch powers due to crosstalk.
Externí odkaz:
http://arxiv.org/abs/2406.06540
Autor:
Frazão, João dos Reis, van Vliet, Vincent, van der Heide, Sjoerd, Hout, Menno van den, Gümüş, Kadir, Albores-Mejía, Aaron, Škorić, Boris, Okonkwo, Chigo
We demonstrate classical and quantum signal co-propagation over a turbulent free-space channel with 3 Tbit/s throughput and record 2.7 Mbit/s secret-key rate. Our real-time GPU-based receiver assessed quantum signal integrity under different turbulen
Externí odkaz:
http://arxiv.org/abs/2401.10581
Autor:
Carabajal, Amy Town, Orsot, Akoua, Moudio, Marie Pelagie Elimbi, Haggai, Tracy, Okonkwo, Chioma Joy, Jarrard III, George Truett, Selby, Nicholas Stearns
This study presents the first comprehensive analysis of the social and economic effects of solar mini-grids in rural African settings, specifically in Kenya and Nigeria. A group of 2,658 household heads and business owners connected to mini-grids ove
Externí odkaz:
http://arxiv.org/abs/2401.02445
Autor:
Gümüş, Kadir, Frazão, João dos Reis, van Vliet, Vincent, van der Heide, Sjoerd, Hout, Menno van den, Albores-Mejia, Aaron, Bradley, Thomas, Okonkwo, Chigo
We experimentally demonstrate adaptive reconciliation for continuous-variable quantum key distribution over a turbulent free-space optical channel. Additionally, we propose a method for optimising the reconciliation efficiency, increasing secret key
Externí odkaz:
http://arxiv.org/abs/2312.13835