Results 61 to 70 of about 499,791 (395)

The application of combined momentum and blade element theory for aerodynamics performance analysis of rotating blades [PDF]

open access: yes, 2011
In this thesis, a simulation package for the Six Degrees of Freedom (6DOF ) motion of an underwater vehicle is developed. Mathematical modeling of an underwater vehicle is done and the parameters needed to write such a simulation package are ...
M Mohammed, Abdelrazzak Gumaa
core  

Hydrogel‐Based Capacitive Sensor Model for Ammonium Monitoring in Aquaculture

open access: yesAdvanced Engineering Materials, EarlyView.
Traditional techniques for monitoring aquaculture water quality, particularly ammonium levels, harm fish. This work presents a novel capacitive sensor with an ionic hydrogel transducer to monitor ammonium concentration in real time based on the ammonium‐induced hydrogel dissociation and osmotic pressure. Monitoring aquaculture water quality, especially
Mohammad Mirzaee   +3 more
wiley   +1 more source

Time Reversal Acoustic Communication Using Filtered Multitone Modulation

open access: yesSensors, 2015
The multipath spread in underwater acoustic channels is severe and, therefore, when the symbol rate of the time reversal (TR) acoustic communication using single-carrier (SC) modulation is high, the large intersymbol interference (ISI) span caused by ...
Lin Sun   +4 more
doaj   +1 more source

Recent Trends in Underwater Visible Light Communication (UVLC) Systems

open access: yesIEEE Access, 2022
In recent years, underwater visible light communication (UVLC) has become a potential wireless carrier candidate for signal transmission in highly critical, unknown, and acrimonious water mediums such as oceans.
Mohammad Furqan Ali   +2 more
semanticscholar   +1 more source

High-speed Underwater Wireless Optical Communication: Potential, Challenges, and Possible Solutions [PDF]

open access: yes, 2017
Traditional underwater communication systems rely on acoustic modems due their reliability and long range. However their limited data rates, lead to the exploration of alternative techniques.
Alouini, Mohamed-Slim
core  

Maillard Type Reaction for Electroless Copper Plating onto Ceramic Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
This work presents the manufacturing of copper‐plated ceramic nanoparticles in an environmentally friendly way. Supported by organic functionalizations with pectin an electroless plating step can be performed. Sustainable reagents like xylose, and several amino acids are used for the reduction process.
Lukas Mielewczyk   +8 more
wiley   +1 more source

Performance Evaluation of Routing Protocols for Underwater Wireless Sensor Networks

open access: yesJournal of Marine Science and Engineering, 2022
Underwater Wireless Sensor Networks (UWSNs) are emerging technology for disclosing multiple applications, such as oil, earth quick, and marine environments. All sensor nodes deployed in UWSNs operate through limited power batteries.
Taj Rahman   +5 more
doaj   +1 more source

Medium Transmission Map Matters for Learning to Restore Real-World Underwater Images [PDF]

open access: yesarXiv, 2022
Underwater visual perception is essentially important for underwater exploration, archeology, ecosystem and so on. The low illumination, light reflections, scattering, absorption and suspended particles inevitably lead to the critically degraded underwater image quality, which causes great challenges on recognizing the objects from the underwater ...
arxiv  

Octopus-inspired adhesive skins for intelligent and rapidly switchable underwater adhesion

open access: yesScience Advances, 2022
The octopus couples controllable adhesives with intricately embedded sensing, processing, and control to manipulate underwater objects. Current synthetic adhesive–based manipulators are typically manually operated without sensing or control and can be ...
Sean T. Frey   +7 more
semanticscholar   +1 more source

A comparison between mathematical models of stationary configuration of an undewater towed system with experimental validation [PDF]

open access: yes, 2017
The analysis of underwater towed systems attracted the interest of many researchers because of the recent years utilization of remotely-operated underwater vehicle (ROV) and towed array in offshore and military applications.
Paifelman, Elena
core   +1 more source

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