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The deep ocean water (DOW) which has low temperature and high nutrients will be effective for regenerating subpolar/temperate seaweed bed and aquaculture of those seaweeds. In the present study, a semi-enclosed small fishing port near the pumping facility of DOW in Kume Island of Okinawa in Japan is chosen for the field experiment of seaweed bed development, because it could be possible to prevent...
A robust, reliable, small, light and low consumption water collecting device, or Sampling System (SS), is a fundamental part of any physical chain and any functional process aiming at automatically monitor or measure chemical or biological water parameters in-situ. Autonomous aquatic vehicles (ASV and AUV), drifters and buoys need a SS to perform their missions. After the SS, the water sample can...
Oceanic fronts, similar to atmospheric fronts, occur at the interface of two fluid (water) masses of varying characteristics. In regions such as these where there are quantifiable physical, chemical, or biological changes in the ocean environment, it is possible — with the proper instrumentation — to track, or map, the front boundary. In this paper, the front is approximated as an isotherm that is...
Vertical profiles of temperature and salinity, or sound speed are used in numerous applications where accurate vertical profiles are crucial. Conventional climatological representations of vertical oceanographic profiles are based on mean or median profiles of historic data in a rectangular area containing the position in question. In areas containing oceanographic fronts mean profiles may not be...
The proposed low cost systems shows the results obtained in the implementation and testing in marine environment of a Innovative Monitoring Underwater Buoy Systems for Marine and Rivers installation with IR-Cam, Instrumental Telemetry and Acoustic Data Acquisition Capability (MUnBuS). This concerning a innovative Monitoring Underwater Buoy Systems that can be remotely controlled from the ground, air,...
This work describes a geotechnical characterization system applied for soil analysis. This system can measure the acoustic, electrical, and thermal responses of soil, and the luminance and temperature of the site. For the evaluation of acoustic response, two piezoelectric transducers are placed separately by a specific distance, where an electric signal is used to generate an acoustic wave and the...
Microbial fuel cells (MFCs) work by providing bacteria in anaerobic sediments with an electron acceptor (anode) that stimulates metabolism of organic matter. The buried anode is connected via control circuitry to a cathode exposed to oxygen in the overlying water. During metabolism, bacteria release hydrogen ions into the sediment and transfer electrons extra-cellularly to the anode that eventually...
The increasing number and complexity of research platforms and respective devices and sensors along with heterogeneous project-driven requirements towards satellite communication, sensor monitoring, quality assessment and control, processing, analysis and visualization has recently lead us to build a generic and cost-effective framework (O2A) to enable the flow of sensor observations to archives....
New wireless applications are emerging subsea. Pinless Subsea Connectors (PSC) aim to transfer high-speed data over short distances. They present several advantages in comparison with previous technologies. However, its design presents several challenges that need to be addressed. For PSC based on electromagnetic signaling, one of the principal factors affecting system planning is signal attenuation...
Important processes that affect the Earth, for example climate change and geohazards, are driven by phenomena that take place in the oceans. To better understand and mitigate the effects of these processes, an important international effort is taking place to deploy permanent and remotely controlled seafloor and water-column observatory systems. In Europe, large cabled systems with marine sensors...
The Sea is often a fragile environment to be protected against possible pollutants. This paper contributes to its safeguard by proposing a new buoy equipped with advanced sensors for the detection of oil spills. In particular, the buoy is provided with various sensors for the evaluation of both meteorological and marine parameters (e.g. waves, wind, temperature), and chemical/physical data acquired...
The newly designed Instrument MTMI (Moored Turbulence Measuring Instrument) developed by OUC (Ocean University of China) had been deployed in the South China Sea from October 19, 2013 to February 10, 2014 at 21° 09.900′ N 117°42.031′ E and succeed to collect time series for about 115 days in 250-m-deep water. According to the requirements of turbulence measurement, the mechanical design was developed...
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