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Journal articles on the topic 'Radio via fibre optique'

Author: Grafiati

Published: 17 May 2025

Last updated: 31 July 2025

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1

Treps, Nicolas. "De l’imagerie quantique aux télécommunications : une histoire de modes." Photoniques, no. 92 (July 2018): 25–28. http://dx.doi.org/10.1051/photon/20189225.

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Du fait de ses potentielles applications, la mise en forme spatiale de la lumière est une des problématiques d’optique les plus actives. Ses succès sont déjà multiples, que ce soit en astronomie ou imagerie biologique, via l’optique adaptative, ou encore pour la focalisation à travers des milieux diffusants. L’optique quantique aussi y a puisé de l’inspiration, pour permettre en particulier d’ordonner spatialement les fluctuations quantiques et réaliser des expériences de métrologie quantique. De manière remarquable, les procédés développés pour ces études fondamentales ont des applications en

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2

Vergniault, Christophe, Edouard Buchoud, Joséphine Boisson-Gaboriau, and Amélie Hallier. "Application des méthodes géophysiques pour le diagnostic de l’aléa cavités sur des ouvrages de grands linéaires, en contexte ferroviaire et hydraulique." Revue Française de Géotechnique, no. 172 (2022): 3. http://dx.doi.org/10.1051/geotech/2022006.

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Cet article traduit la volonté de deux maîtres d’ouvrages (ayant une compétence interne d’ingénierie conseils en géophysique), que sont SNCF Réseau et EDF, de mettre en commun leurs retours d’expériences pour améliorer la gestion des risques liés à l’aléa cavités souterraines sur des ouvrages de grands linéaires, en contexte ferroviaire ou hydraulique. Cette coopération a permis de valider plusieurs méthodes de diagnostic, par reconnaissance et auscultation, afin de détecter des cavités souterraines et de suivre leur évolution : dans deux contextes géologiques distincts (craie et marnes à gyps

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3

Sirgant, Aline, Stéphane Mottin, Raymond Cespuglio, Claude Pedri, and Pierre Laporte. "Mesure du NADH par microchip YAG triplé." J. Phys. IV Pr5-9 (May 1, 1999): 119–20. https://doi.org/10.5281/zenodo.439016.

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Nous présentons une instrumentation compacte, transportable, développé à l origine pour mesurer la fluorescence induite par laser du NADH cérébral chez l animal libre de ces mouvements. La source laser microchip Nd3+ : YAG est triplée en fréquence. Une fibre optique amène la lumière laser jusqu à la zone cible du cerveau et cette même fibre récupère la fluorescence de cette microzone (noyau du raphé dorsal). L acquisition de données se fait via un monochromateur suivi soit d un photomultiplicateur et d un Box-car soit d une caméra à balayage de fente. Les premières expériences réalisées sur un

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Watkins, S. "Development of a micro air vehicle." Aeronautical Journal 107, no. 1068 (2003): 117–23. http://dx.doi.org/10.1017/s0001924000018406.

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AbstractThe aerodynamic characteristics of five planar flying wing plan-forms suitable for micro air vehicles (MAVs) are investigated via a series of wind-tunnel tests. The external boundary of the five plan-forms result from slender carbon fibre (CF) struts under various degrees of buckling. The maximum lift/drag ratios were similar for all the (quite different) shapes but the stall characteristics were found to be markedly different. Results are presented of cross-plane traverses detailing the wake vector field and turbulence characteristics for two of the planforms at conditions close to st

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Nugroho, Endang Retno, and Rianto Nugroho. "Perancangan Sistem Komunikasi Kabel Laut (SKKL) Fiber Optik Link Surabaya-Bawean." Jurnal Ilmiah Giga 25, no. 1 (2022): 28. http://dx.doi.org/10.47313/jig.v25i1.1663.

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<p><strong>Abstract</strong>. Internet network is an important requirement in the digital era. Indonesia is listed as the country with the highest data traffic growth in the world in 2016. To meet the needs of this data traffic, network access is needed. Indonesia has a geography that mostly covers the ocean. The islands lined up from Sabang to Merauke up to tens of thousands. This large number of islands is a problem in building communication infrastructure. Bawean Island is one of the islands in Indonesia with an area of 197 km2 with a population of more than 100,000 people

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Fiorini Granieri, Simone, Gerardo Maria Pagano, Marco Cecchetti, et al. "Turbostratic Carbon Nano Onion Electrode for High Power Density Vanadium Redox Flow Battery." ECS Meeting Abstracts MA2023-02, no. 59 (2023): 2874. http://dx.doi.org/10.1149/ma2023-02592874mtgabs.

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The redox flow battery (RFB) is one of the most promising technologies for stationary energy storage. It consists of a voltaic cell whose electrolytes are stored in tanks outside the system. Whilst the chemistries of the anodic and cathodic electrolytes define the energy density of a RFB system, its power density is determined primarily by its electrodes. These are typically porous carbon media on the surface of which the redox reactions occur. They are a critical component since they require a detailed engineering of electrocatalytically active surface area and mass transport. Still today, th

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Kumar, Ajay, Deepak Kedia, and Shelly Singla. "MZM–SOA based RoF system for 30-tuple millimeter-wave generation." Journal of Optical Communications, June 5, 2024. http://dx.doi.org/10.1515/joc-2024-0082.

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Abstract In this paper, we have reported radio over fiber system with 30-tuple millimeter-wave generation using dual parallel Mach–Zehnder modulator and semiconductor optical amplifier. The optimum choice of Mach–Zehnder modulator parameters has resulted into generation of signal lightwave and pump signal with frequency separation of 10f RF. Four wave mixing effect in semiconductor optical amplifier results into 30-tuple millimeter-wave signal. The proposed scheme is applicable to radio over fiber system with multiple base stations. The multiple number of frequencies such as 50 GHZ, 100 GHz, a

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Ngo, Trang Thi Thu, Thu Anh Pham, Nhan Duc Nguyen, and Ngoc The Dang. "Hybrid OFDM RoF-Based WDM-PON/MMW Backhaul Architecture For Heterogeneous Wireless Networks." REV Journal on Electronics and Communications, March 6, 2018. http://dx.doi.org/10.21553/rev-jec.150.

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In this paper, a hybrid backhaul architecture, which is based on wavelength-division multiplexing passive optical networks (WDM-PON) and millimeter-wave (MMW) communications, is proposed to deliver orthogonal frequency-division multiplexing (OFDM) signals in heterogeneous wireless networks. MMW radio-over-fiber (RoF) technique, which combines the advantages of the both optical fiber and wireless communications, is used to simplify the base stations and provide flexibility long reach and high capacity connections. The feasibility of the proposed hybrid backhaul architecture is investigated via

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9

Chitnavis, Jai. "Silent burn: the hidden danger and effects of bright light from fibre-optic cables in arthroscopic knee surgery." Journal of Surgical Case Reports 2020, no. 4 (2020). http://dx.doi.org/10.1093/jscr/rjaa068.

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Abstract Following an uneventful arthroscopic menisectomy of the right knee, a white circular skin lesion, 1 cm in diameter, was noted on the anterior left thigh of a 23-year-old patient. The overlying paper surgical drape had not ignited nor produced smoke. Close inspection revealed a minute perforation in the drape with slight discolouration. No electro-cautery, radio-ablation or irritant skin preparation had been used during surgery. Tests failed to identify fault with the light source, fibre-optic cable or arthroscope. The lesion was diagnosed as a full-thickness thermal burn resulting fro

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Jin, Wenhui, Ping Wang, Xiaopeng An, Congcong Zhu, Yongfei Li, and Yan Wang. "Anion Doping Synergistic Strategy Achieving Multi‐Interfaces and Modulated Dielectric Coupling for Efficient Electromagnetic Response." Small Methods, April 9, 2025. https://doi.org/10.1002/smtd.202500290.

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AbstractEfficient microwave absorbers are needed to address the electromagnetic pollution caused by the proliferation of new radio technologies and equipment. Excellent microwave absorption performance can be achieved by controlling the dielectric constant. Heteroatom‐doped bimetallic materials are promising electromagnetic wave absorption (EMA) materials due to their tunable structures and low cost. In particular, the presence of anionic sites significantly affects their dielectric constant and electrical conductivity. Herein, a 1D carbon nanofiber material is prepared by encapsulating FeCo n

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11

Wayth, Randall, Marcin Sokolowski, Tom Booler, et al. "The Engineering Development Array: A Low Frequency Radio Telescope Utilising SKA Precursor Technology." Publications of the Astronomical Society of Australia 34 (2017). http://dx.doi.org/10.1017/pasa.2017.27.

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AbstractWe describe the design and performance of the Engineering Development Array, which is a low-frequency radio telescope comprising 256 dual-polarisation dipole antennas working as a phased array. The Engineering Development Array was conceived of, developed, and deployed in just 18 months via re-use of Square Kilometre Array precursor technology and expertise, specifically from the Murchison Widefield Array radio telescope. Using drift scans and a model for the sky brightness temperature at low frequencies, we have derived the Engineering Development Array’s receiver temperature as a fun

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Furniss, C., A. Carstens, and I. Cilliers. "Eustachian tube diverticulum chondroids and neck abscessation in a case of Streptococcus equi subsp. equi : clinical communication." Journal of the South African Veterinary Association 78, no. 3 (2007). http://dx.doi.org/10.4102/jsava.v78i3.311.

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A 12-year-old, grey, crossbred pony mare was presented with a swelling in the neck over the area of the 2nd cervical vertebra (C2), which was found to be painful on palpation. The neck was held stiffly. Radiography of the cervical region showed a focal area of increased radio-opacity over the dorsal, caudal and lateral aspect of the dorsal spinous process of C2. Ultrasound confirmed the presence of a hypoechoic area approximately 15 cm in diameter superimposed over the dorsal spinous process of C2. An aspirate was taken of the mass, which revealed purulent exudate confirming the diagnosis of a

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13

Belkacem, Anes, and Ahmed Riad Borsali. "Simultaneous distribution of wired and two 2 × 2 MIMO wireless OFDM signals over an integrated RoF-PON system." Journal of Optical Communications, July 29, 2021. http://dx.doi.org/10.1515/joc-2021-0029.

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Abstract In this paper, the integration of the radio over fiber technology into a passive optical network (RoF-PON) is proposed to simultaneously distribute wired and two wireless standards each one transports 2 × 2 multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) signals. This simultaneous transmission is operated based on a single centralized optical wavelength and enabled by a polarization division multiplexing technique. The proposed RoF-PON system offers high spectral efficiency and is designed for unlicensed industrial, scientific, and medical bands at 2.4

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14

Ebrahim, Khalil Jasim, and Alauddin Al-Omary. "Effects of Sandstorms on Vehicular-to-Road Visible-Light Communication." Journal of Optical Communications, September 29, 2018. http://dx.doi.org/10.1515/joc-2018-0035.

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AbstractVisible light communication (VLC), popularly known as light fidelity (Li-Fi), is a promising alternative to overcome the limitations of radio-wave communication. VLC is a green technology which uses light-emitting diode (LED) illumination to transmit data without needing fibre cables. VLC is applicable for both indoor and outdoor communication. In this study, we investigate the effect of sandstorms on VLC via simulating a vehicular-to-road VLC (V2LC) outdoor application. Sandstorms are a weather phenomenon which frequently occurs in the Arab peninsula and other parts of the world; in t

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15

Bessiere, P. S., C. Ramos Almeida, L. R. Holden, C. N. Tadhunter, and G. Canalizo. "QSOFEED : Relationship between star formation and active galactic nuclei feedback." Astronomy & Astrophysics, June 19, 2024. http://dx.doi.org/10.1051/0004-6361/202348795.

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Large-scale cosmological simulations suggest that feedback from active galactic nuclei black (AGN) plays a crucial role in galaxy evolution. black More specifically outflows are one of the mechanisms by which the accretion energy of the AGN is transferred to the interstellar medium (ISM), heating and driving out gas and impacting star formation (SF). The purpose of this study is to directly test this hypothesis utilising SDSS spectra of a well-defined sample of 48 low-redshift (z<0.14) type 2 quasars (QSO2s). By exploiting these data, we were able to characterise the kinematics of the warm

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16

Barker, Timothy Scott. "Information and Atmospheres: Exploring the Relationship between the Natural Environment and Information Aesthetics." M/C Journal 15, no. 3 (2012). http://dx.doi.org/10.5204/mcj.482.

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Our culture abhors the world.Yet Quicksand is swallowing the duellists; the river is threatening the fighter: earth, waters and climate, the mute world, the voiceless things once placed as a decor surrounding the usual spectacles, all those things that never interested anyone, from now on thrust themselves brutally and without warning into our schemes and manoeuvres (Michel Serres, The Natural Contract, p 3). When Michel Serres describes culture's abhorrence of the world in the opening pages of The Natural Contract he draws our attention to the sidelining of nature in histories and theories th

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