Results 21 to 30 of about 259,965 (163)

Invasive Group A streptococcal infections: are we facing a new outbreak? A case series with the experience of a single tertiary center

open access: yesItalian Journal of Pediatrics, 2023
Background In pediatric age, Group A Streptococcus (GAS) is responsible for a wide spectrum of clinical manifestations, from mild localized infections to life-threatening invasive diseases.
Nicolò Garancini   +8 more
doaj   +1 more source

Volterra-assisted Optical Phase Conjugation: a Hybrid Optical-Digital Scheme For Fiber Nonlinearity Compensation [PDF]

open access: yes, 2018
Mitigation of optical fiber nonlinearity is an active research field in the area of optical communications, due to the resulting marked improvement in transmission performance.
Bayvel, Polina   +2 more
core   +2 more sources

Study on electric field distribution characteristics of the maintenance area when UHV AC transmission line crossing 220 kV tower

open access: yesThe Journal of Engineering, 2019
With the rapid development of China's power grid, it is becoming increasingly common that the multi-circuit overhead transmission lines cross over each other.
Feng Huo   +4 more
doaj   +1 more source

Radiometric calibration of a non-imaging airborne spectrometer to measure the Greenland ice sheet surface [PDF]

open access: yesAtmospheric Measurement Techniques, 2019
Methods to radiometrically calibrate a non-imaging airborne visible-to-shortwave infrared (VSWIR) spectrometer to measure the Greenland ice sheet surface are presented.
C. J. Crawford   +18 more
doaj   +1 more source

Automatic Extraction of High-Voltage Bundle Subconductors Using Airborne LiDAR Data

open access: yesRemote Sensing, 2020
Overhead high-voltage conductors are the chief components of power lines and their safety has a strong influence on social and daily life. In the recent decade, the airborne laser scanning (ALS) technique has been widely used to capture the three ...
Nosheen Munir   +2 more
doaj   +1 more source

Modelling natural electromagnetic interference in man-made conductors for space weather applications [PDF]

open access: yesAnnales Geophysicae, 2016
Power transmission lines above the ground, cables and pipelines in the ground and under the sea, and in general all man-made long grounded conductors are exposed to the variations of the natural electromagnetic field.
L. Trichtchenko
doaj   +1 more source

Full-Asynchronous Gigabit-Symmetric DPSK Downstream and OOK Upstream OCDMA-PON with Source-Free ONUs Employing All-Optical Self-Clocked Time Gate [PDF]

open access: yes, 2012
We propose an asynchronous gigabit-symmetric optical code division multiplexing access passive optical network (OCDMA-PON) in which optical network units (ONUs) are source-free. In the experiment, we demonstrate a duplex OCDMA system with a 50 km 10 Gbit/
Dai, Bo   +3 more
core   +1 more source

Use of rod compactors for high voltage overhead power lines magnetic field mitigation [PDF]

open access: yes, 2017
In the last decades, strengthening the high voltage transmission system through the installation of new overhead power lines has become critical, especially in highly developed areas.
Bignucolo, Fabio   +3 more
core   +2 more sources

Multi-span transmission using phase and amplitude regeneration in PPLN-based PSA.

open access: yesOptics Express, 2013
We demonstrated multi-span transmission using a periodically poled LiNbO(3) (PPLN) based phase sensitive amplifier (PSA). An in-line PSA with a carrier recovery and phase locking system is implemented as a repeater amplifier in a recirculating loop.
T. Umeki   +4 more
semanticscholar   +1 more source

Fast Structuring of Radio Networks for Multi-Message Communications [PDF]

open access: yes, 2013
We introduce collision free layerings as a powerful way to structure radio networks. These layerings can replace hard-to-compute BFS-trees in many contexts while having an efficient randomized distributed construction. We demonstrate their versatility by
B. Chlebus   +9 more
core   +2 more sources

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