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Underwater Wireless Sensor Networks (UWSNs) have recently established themselves as an extremely interesting area of research thanks to the mysterious qualities of the ocean. The UWSN consists of sensor nodes and vehicles working to collect data and complete tasks. The battery capacity of sensor nodes is quite limited, which means that the UWSN network needs to be as efficient as it can possibly be. It is difficult to connect with or update a communication that is taking place underwater due to the high latency in propagation, the dynamic nature of the network, and the likelihood of introducing errors. This makes it difficult to communicate with or update a communication. Cluster-based underwater wireless sensor networks (CB-UWSNs) are proposed in this article. These networks would be deployed via Superframe and Telnet applications. In addition, routing protocols, such as Ad hoc On-demand Distance Vector (AODV), Fisheye State Routing (FSR), Location-Aided Routing 1 (LAR1), Optimized Link State Routing Protocol (OLSR), and Source Tree Adaptive Routing-Least Overhead Routing Approach (STAR-LORA), were evaluated based on the criteria of their energy consumption in a range of various modes of operation with QualNet Simulator using Telnet and Superframe applications. STAR-LORA surpasses the AODV, LAR1, OLSR, and FSR routing protocols in the evaluation report's simulations, with a Receive Energy of 0.1 mWh in a Telnet deployment and 0.021 mWh in a Superframe deployment. The Telnet and Superframe deployments consume 0.05 mWh transmit power, but the Superframe deployment only needs 0.009 mWh. As a result, the simulation results show that the STAR-LORA routing protocol outperforms the alternatives.
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http://dx.doi.org/10.3390/s23104844 | DOI Listing |
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August 2025
School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P. R. China.
As an outstanding flexible conductive material, eutectogels have received increasing attention due to their potential applications in fields such as flexible wearable electronics and wireless communications. However, the development of multifunctional eutectogels with stability in underwater environments is still very challenging due to the high sensitivity of most deep eutectic solvents (DES) to water. Herein, a hydrophobic eutectogel is fabricated by simple photopolymerization, the introduction of macromolecular cross-linking agents, fluorine-rich monomers and dynamic light-responsive functional ammonium molybdate tetrahydrate (Mo), as well as multiple dynamic interactions within the eutectogel, endowed it with excellent mechanical properties (160 kPa), long-term underwater repetitive adhesion (102.
View Article and Find Full Text PDFSci Rep
August 2025
Saltenna Inc., 1751 Pinnacle Dr. Ste. 600, McLean, VA, 22102-4007, USA.
Electromagnetic properties of water and water interfaces in the radio frequency range have fundamental importance in such diverse fields of science and technology as physics, chemistry, life sciences and wireless communications. Despite their importance, many aspects of these properties remain controversial or unresolved, especially where it concerns water response to radio frequency electromagnetic fields inside biological matter or near biological interfaces. Here we note that in the radio frequency range water belongs to a class of electromagnetic materials in which the real part of their complex dielectric permittivity-squared approximately equals zero.
View Article and Find Full Text PDFIn this work, we propose a novel, to our knowledge, modulation scheme based on the Kramers-Kronig relation for underwater wireless optical communication (UWOC) systems, utilizing 8-coupled green laser diodes (LDs). This scheme enables a data transmission rate of 1 Gb/s over a 100-m distance for the UWOC link. Similar to quadrature amplitude modulation (QAM) and carrierless amplitude and phase (CAP) modulation, the modulation scheme simultaneously conveys both amplitude and phase information through the construction of a minimum-phase signal at the transmitter by leveraging the well-established Kramers-Kronig relation.
View Article and Find Full Text PDFVisible light communication (VLC) technology has gained significant attention due to its abundant spectrum resources and high channel capacity for future LiFi and underwater optical wireless communication applications in the 6 G era. Aiming at ubiquitous wireless communication, the study of VLC across different media becomes an important research topic. In particular, the optical wireless communication in ice remains limited.
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