Results 21 to 30 of about 16,439 (264)

Performance Analysis and Applications of Passive Optical Networks

open access: yesElectrica, 2015
Fiber technology, which provides high bandwidth in data, sound and video traffic in communication networks, as well as in new applications, has reached to the end user.
Özge GÜRE, N. Özlem ÜNVERDİ
doaj   +2 more sources

Lossless WDM PON Photonic Integrated Receivers Including SOAs

open access: yesApplied Sciences, 2019
The role of a semiconductor optical amplifier (SOA) for amplifying downstream traffic at optical network terminals (ONT) within a silicon-photonics integrated receiver in a high capacity passive optical network (PON) is investigated. The nearly traveling
Pantea Nadimi Goki   +6 more
doaj   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

The Applications for the Calculation and Optimization of Passive Optical Networks Attenuation Characteristics

open access: yesAdvances in Electrical and Electronic Engineering, 2010
The passive optical networks represent modern and promising solution to meet the increasing demands on the transmission speed in access networks. These optical networks consist only of passive optical components, essential role play mainly the passive ...
Pavel Lafata, Jiri Vodrazka
doaj  

Choroid Plexus Enlargement and USPIO‐Based Inflammatory Feature in Cerebral Small Vessel Disease

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective The choroid plexus (CP) is a key component of the blood–cerebrospinal fluid barrier (BCSFB), but its mechanism of action in cerebral small vessel disease (CSVD) remains unclear. This study investigated CP volume (CPV) alterations and their association with conventional imaging markers in CSVD and explored the underlying role of ...
Yongqiang Qu   +11 more
wiley   +1 more source

Utilization of 10 Gbps DWDM System with Duobinary Modulation into Passive Optical Network

open access: yesJournal of Communications Software and Systems, 2018
Passive optical networks are considered to be the most promising solution for future access networks. Growing demand for capability and high bit rate transmission has become an important part of metropolitan optical communication networks in recent years.
Tomáš Huszaník   +2 more
doaj  

OFDM–IDMA for Uplink Transmission in Passive Optical Networks

open access: yesIEEE Photonics Journal, 2012
In this paper, we propose the orthogonal frequency-division multiplexing-interleaved division multiplexing access (OFDM-IDMA) technique for passive optical networks (PONs).
C. Sanchez, B. Ortega, J. Capmany
doaj   +1 more source

Design and analysis of a 32 × 5 Gbps passive optical network employing FSO based protection at the distribution level☆

open access: yesAlexandria Engineering Journal, 2020
A cost efficient and reliable single mode fiber and free space optics based hybrid 32×5Gbps ultra dense wavelength division multiplexed-passive optical network architecture employing optical comb and polarization multiplexing is proposed.
Jawad Mirza   +4 more
doaj   +1 more source

Comparing the Effect of Semi‐Immersive Virtual Reality, Computerized Cognitive Training, and Traditional Rehabilitation on Cognitive Function in Multiple Sclerosis: A Randomized Clinical Trial

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Cognitive impairment is a common non‐motor symptom in Multiple Sclerosis (MS), negatively affecting autonomy and Quality of Life (QoL). Innovative rehabilitation strategies, such as semi‐immersive virtual reality (VR) and computerized cognitive training (CCT), may offer advantages over traditional cognitive rehabilitation (TCR ...
Maria Grazia Maggio   +8 more
wiley   +1 more source

Binary Modulation Formats in Optical Access Networks

open access: yesAdvances in Electrical and Electronic Engineering, 2010
In this paper the binary modulation formats and their application in passive optical networks have been discussed. Passive optical networks are characterized by dividing the optical signal between several end users by using passive splitters, which added
Vladimir Tejkal   +3 more
doaj  

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