Results 1 to 10 of about 2,673 (197)

Novel structure of optical add/drop filters and multi-channel filter based on photonic crystal for using in optical telecommunication devices [PDF]

Journal of Optoelectronical Nanostructures, 2019
In this paper, Using a 2D photonic crystal and a novel square ring resonator,several compact and simple structures have been introduced in the present paper toconstruct optical add/drop filters and multi-channel filter.
Vahid Fallahi, Mahmood Seifouri
doaj   +2 more sources

Variability of the Rain Drop Size Distribution : Stochastic Simulation and Application to Telecommunication Microwave Links

, 2012
Precipitation is an important component of the Earth' water cycle and needs to be carefully monitored. Its large variability over a wide range of spatial and temporal scales must be taken into account. For example, hydrological models require accurate rainfall estimates at high spatial and temporal resolutions (e.g., 1 km and 5 min or higher ...
Marc Schleiss
openaire   +3 more sources

Optical Limiting in a Novel Photonic Material—DNA Biopolymer Functionalized with the Spirulina Natural Dye [PDF]

Molecules
The results of an experimental comparative study on absorptive nonlinear optical properties of deoxyribonucleic acid (DNA)–cetyltrimethylammonium chloride (CTMA) biopolymer functionalized with spirulina natural dye, as solutions in butanol, and on the ...
Petronela Gheorghe, Adrian Petris
doaj   +2 more sources

Thermally tunable add-drop filter based on valley photonic crystals for optical communications [PDF]

Nanophotonics
Valley photonic crystals (VPCs) provide an intriguing approach to suppress backscattering losses and enable robust transport of light against sharp bends, which could be utilized to realize low-loss and small-footprint devices for on-chip optical ...
Sun Lu, Li Xingfeng, Hu Pan, Wang Hongwei, Zhang Yong, Tang Guojing, He Xintao, Dong Jianwen, Su Yikai   +8 more
doaj   +2 more sources

A year of attenuation data from a commercial dual-polarized duplex microwave link with concurrent disdrometer, rain gauge, and weather observations [PDF]

Earth System Science Data, 2021
Commercial microwave links (CMLs) in telecommunication networks can provide relevant information for remote sensing of precipitation and other environmental variables, such as path-averaged drop size distribution, evaporation, or humidity.
A. Špačková, V. Bareš, M. Fencl, M. Schleiss, J. Jaffrain, A. Berne, J. Rieckermann   +6 more
doaj   +1 more source

OpenMRG: Open data from Microwave links, Radar, and Gauges for rainfall quantification in Gothenburg, Sweden [PDF]

Earth System Science Data, 2022
Accurate rainfall monitoring is critical for sustainable societies and yet challenging in many ways. Opportunistic monitoring using commercial microwave links (CMLs) in telecommunication networks is emerging as a powerful complement to conventional ...
J. C. M. Andersson, J. Olsson, R. (C. Z. ). van de Beek, J. Hansryd   +3 more
doaj   +1 more source

Strain to ground motion conversion of distributed acoustic sensing data for earthquake magnitude and stress drop determination [PDF]

Solid Earth, 2021
The use of distributed acoustic sensing (DAS) presents unique advantages for earthquake monitoring compared with standard seismic networks: spatially dense measurements adapted for harsh environments and designed for remote operation.
I. Lior, I. Lior, A. Sladen, D. Mercerat, J.-P. Ampuero, D. Rivet, S. Sambolian   +6 more
doaj   +1 more source

Subjective Influence of Camera-Gaze Angular Offset

IEEE Access, 2022
The study aimed to evaluate the difficulty in maintaining eye contact during a teleconference for different camera-gaze angular offsets. Videoconferencing systems may compromise the eye contact between participants due to imperfect angular alignment ...
Jan Holub, Scott Isabelle, Adela Krylova, Hakob Avetisyan   +3 more
doaj   +1 more source

Analog Wavelength Locking in an Optical Single-Sideband Transmitter of a Millimeter-Wave Radio-Over-Fiber Link Featuring a Micro-Ring Resonator and a Heat-Pump-Controlled Laser

Photonics, 2023
This paper presents a novel approach to addressing the issue of temperature-induced instability in an optical, single-sideband transmitter based on a micro-ring resonator (MRR) suitable for millimeter-wave (mmW) radio-over-fiber (RoF) communications.
Kristjan Vuk Baliž, Andraž Debevc, Matjaž Vidmar, Boštjan Batagelj   +3 more
doaj   +1 more source

A novel approach for optimization of handover mechanism using metaheuristics algorithms

Measurement: Sensors, 2022
The new generation wireless system is an integrated global network, which provides many services for end users across the globe. The major requirement of end users is to allow the mobile user to roam seamlessly across the network.
Mithun B. Patil, Laxmi Math
doaj   +1 more source