Results 61 to 70 of about 22,589,022 (359)

Energy Efficiency of Uplink Cell-Free Massive MIMO With Transmit Power Control in Measured Propagation Channel

open access: yesIEEE Open Journal of Circuits and Systems, 2021
Cell-free massive MIMO (CF-mMIMO) provides wireless connectivity for a large number of user equipments (UEs) using access points (APs) distributed across a wide area with high spectral efficiency (SE).
Thomas Choi   +7 more
doaj   +1 more source

Deciphering the Origin of Higher Shell Coordination on Single Iron Catalysts for Resilient Modulating Persulfate Oxidation Into Singlet Oxygen Pathway

open access: yesAdvanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
This study reveals that higher shell S coordination can effectively modulate the spin state of FeN4 site via long‐range electronic interactions, giving rise to the oriented generation of singlet oxygen from peroxymonosulfate activation. Abstract Precise manipulation of coordination structure of single‐atom sites and establishment of schematic ...
Liang Zhang   +8 more
wiley   +1 more source

UHVDC Communication System

open access: yesProcedia Engineering, 2012
AbstractThis paper describes detailedly the design and implementation of communication system for UHVDC(ultra high voltage direct current), analyzes all kinds of communication for UHVDC .The communication structure for UHVDC has been used in real project.The paper is guilding significance on the research, design and implementation for communication ...
Rao Guo-hui, Cui Xiao-you
openaire   +2 more sources

Communications in the 6G Era

open access: yesIEEE Access, 2020
The focus of wireless research is increasingly shifting toward 6G as 5G deployments get underway. At this juncture, it is essential to establish a vision of future communications to provide guidance for that research. In this paper, we attempt to paint a
H. Viswanathan, P. Mogensen
semanticscholar   +1 more source

Designing of Self‐Dispersing Soft Dendritic Microcleaners for Microplastics Capture and Recovery

open access: yesAdvanced Functional Materials, EarlyView.
The capture and recovery of microplastics from open aquatic systems is a complex problem, which necessitates nontrivial solutions. The principles of a comprehensive multistage process based on sustainably sourced microcleaners with hierarchical morphology are demonstrated.
Haeleen Hong   +3 more
wiley   +1 more source

Discovery of an Intrinsic Antiferromagnetic Semiconductor EuSc2Te4 With Magnetism‐Driven Nonlinear Transport

open access: yesAdvanced Functional Materials, EarlyView.
EuSc₂Te₄, an antiferromagnetic semiconductor, exhibits a nonlinear Hall effect (NLHE) characterized by quadratic current–voltage behavior. Combined experimental and theoretical studies reveal that this NLHE is linked to its antiferromagnetism and involves contributions from the quantum metric.
Seng Huat Lee   +15 more
wiley   +1 more source

An RSSI-Based Low-Power Vehicle-Approach Detection Technique to Alert a Pedestrian

open access: yesSensors, 2019
Information about an approaching vehicle is helpful for pedestrians to avoid traffic accidents while most of the past studies related to collision avoidance systems have focused on alerting drivers and controlling vehicles.
Yoshito Watanabe, Yozo Shoji
doaj   +1 more source

Tailoring Hole‐Blocking Layers Enables a Versatile Approach for Fast Photomultiplication‐Type Organic Photodetectors

open access: yesAdvanced Functional Materials, EarlyView.
This study investigates the role of hole‐blocking layers (HBLs), particularly the combination of two HBLs in photomultiplication‐type organic photodetectors (PM‐OPDs), which results in high gain and record‐fast response. The proposed HBL strategy also allows for the use of photoactive layer with balanced donor–acceptor stoichiometry, which can be ...
Awais Sarwar   +7 more
wiley   +1 more source

A Study on an Object oriented Modeling for the Satelite Control System Development reusing Structured Analysis and Design Approach [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
The object-oriented approach is a difficult method for engineers who are accustomed to other software development methods although it is an excellent software development approach.
Jaehoon Kim, Wonchan Jung, Sangbum Lee
doaj  

Performance Evaluation of Integrated Multi-Access Edge Computing and Fiber-Wireless Access Networks

open access: yesIEEE Access, 2018
With the widespread use of smart mobile devices, the exponential growth of mobile Internet traffic and newly emerging services, such as Internet of Things, virtual reality/augmented reality, and serious games, the network performance requirements for ...
Jing Liu   +4 more
doaj   +1 more source

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