Results 21 to 30 of about 501,850 (281)

Conceptualising quality early childhood education: Learning from young children in Brazil and South Africa through creative and play‐based methods

open access: yesBritish Educational Research Journal, EarlyView., 2023
Abstract Early childhood has increasingly been acknowledged as a vital time for all children. Inclusive and quality education is part of the United Nations Sustainable Development Goals, with the further specification that all children have access to quality pre‐primary education.
Laura H. V. Wright   +8 more
wiley   +1 more source

A DSRC-Based Vehicular Positioning Enhancement Using a Distributed Multiple-Model Kalman Filter

open access: yesIEEE Access, 2016
Some inherent shortcomings of the global positioning systems (GPSs), such as limited accuracy and availability, limit the positioning performance of a vehicular location system in urban harsh environments.
Yunpeng Wang   +4 more
doaj   +1 more source

Recent Advances and Challenges in Security and Privacy for V2X Communications

open access: yesIEEE Open Journal of Vehicular Technology, 2020
In recent studies, vehicular networks have been considered as a promising solution to achieve better traffic management and to improve the driving experience of drivers. In vehicular networks, vehicle-to-everything (V2X) services, e.g.
Jiaqi Huang   +3 more
doaj   +1 more source

Stuck in Traffic (SiT) Attacks: A Framework for Identifying Stealthy Attacks that Cause Traffic Congestion [PDF]

open access: yes, 2012
Recent advances in wireless technologies have enabled many new applications in Intelligent Transportation Systems (ITS) such as collision avoidance, cooperative driving, congestion avoidance, and traffic optimization.
Atia, George, Guirguis, Mina
core   +2 more sources

Throughput and Economics of DSRC-Based Internet of Vehicles

open access: yesIEEE Access, 2018
Vehicular mesh networks could be an important new way to provide Internet access in urban areas using dedicated short range communications (DSRC). In some circumstances, DSRC technology is more cost-effective than expanding the capacity of cellular ...
Alexandre K. Ligo   +3 more
doaj   +1 more source

A Comprehensive Investigation on Multi-User Interference Effects in Vehicular Visible Light Communications

open access: yesSensors, 2023
Vehicular visible light communications (VLC) are considered a suitable technology for vehicular platooning applications. Nevertheless, this domain imposes strict performance requirements.
Emmanuel Plascencia   +5 more
doaj   +1 more source

On the Trade-off Between Spectrum Efficiency with Dedicated Access and Short End-to-End Transmission Delays with Random Access in DVB-RCS2 [PDF]

open access: yes, 2013
This paper analyses the performance of TCP over random and dedicated access methods in the context of DVB-RCS2. Random access methods introduce a lower connection delay compared to dedicated methods.
Bui, Huyen Chi   +4 more
core   +2 more sources

The New Era of Long-Range “Zero-Interception” Ambient Backscattering Systems: 130 m with 130 nA Front-End Consumption

open access: yesSensors, 2022
Internet of Things applications based on backscatter radio principles have appeared to address the limitations of high cost and high power consumption. While radio-frequency identification (RFID) sensor nodes are among the most commonly utilized state-of-
Spyridon Nektarios Daskalakis   +4 more
doaj   +1 more source

Ubiquitous Integrity via Network Integration and Parallelism—Sustaining Pedestrian/Bike Urbanism

open access: yesAlgorithms, 2013
Nowadays, due to the concern regarding environmental issues, establishing pedestrian/bike friendly urbanism is widely encouraged. To promote safety-assured, mobile communication environments, efficient, reliable maintenance, and information integrity ...
Li-Yen Hsu
doaj   +1 more source

Multi-channel Wireless Networks with Infrastructure Support: Capacity and Delay [PDF]

open access: yes, 2014
In this paper, we propose a novel multi-channel network with infrastructure support, called an \textit{MC-IS} network, which has not been studied in the literature.
Dai, Hong-Ning   +2 more
core   +2 more sources

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