ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Animals' tagging has been widely used to identify their individuality using physical methods. In small swimming animals (e.g. zebrafish), however, physical tagging is considered a painful, costly and impractical. This paper proposes a new tagging method for zebrafish that is based on Speed-Up Robust ...
In internet of things (IT) environment, a sensor interface device is essential for data collection in wireless sensor network (WSN) system for water quality monitoring (WQM) as the water pollution is a critical issue globally. This paper presents the design of a WSN based reconfigurable smart sensor ...
Long period fiber gratings (LPFGs) were over coated with iron (Fe) and subjected to oxidation in air and in solutions of water containing different sodium chloride (NaCl) concentrations. The formation of iron oxides and hydroxides was monitored in real time by following the features of the gratings ...
The detection of dissolved carbon dioxide (dCO2) is made possible through a colorimetric effect that occurs in a sensitive membrane. The reaction with dCO2 changes the pH of the membrane causing a small difference in its colour which results in a characteristic absorbance spectrum band near 435 nm. ...
The management of sensor nodes on the sea floor represents an important challenge due to the high difficulties associated to the deployment and recovering of untethered instruments on the seafloor. These difficulties are not only related to the management of the instruments themselves but also related ...
This paper describes two experiments conducted in a pond covered by the seagrass Cymodocea nodosa at the Aquaculture Research Station of the Portuguese Institute for the Sea and Atmosphere in Olhao, Portugal, aiming at developing acoustic methods to assess oxygen production of seagrasses. The first ...
Biofouling represents a real technical challenge in the marine environment. Current antifouling strategies offer insufficient protection from biofouling for many applications, e.g. water sensing technologies, and effective novel methods of antifouling are required to support technology developments ...
In this paper a wideband underwater acoustic (UWA) channel simulator is developed based on the geometry of the system deployment and by considering the statistics of the random amplitude variation of the channel. This channel simulator is capable of modeling any relative motion between the transmitter ...
This paper presents a filter for positioning of an underwater vehicle in exposed aquaculture environments. The input to the filter is time of flight measurements from acoustic transponders mounted at near the sea surface. The transponders are exposed to oscillations from wave disturbances. This has ...
The concept for an autonomous seafloor mapping system for ocean exploration is being built to compete in the Shell Ocean Discovery XPRIZE competition (http://oceandiscovery. xprize.org) by the international team of Nippon Foundation / GEBCO Alumni (see: http://www.gebco-nf.com/). The Team is advised ...
This paper proposes a practical system of the fish size measurement which is effective and simple. Because the fry we measured is very small, the main technical problem when we measure the fish size is to measure accurately without hurting them. Although the live fish can be measured directly or after ...
A number of studies have linked the presence of fish farms to sea lice in the environment (e.g. Harte et al 2017) and infestations of wild salmonids (Middlemas et al. 2010 Vollset et al. 2016a) and subsequent population dynamics in marine aquaculture areas (Vāllestad et al. 2009; Vollset et al. 2016a). ...
We investigate the importance of understanding the underlying physical oceanography of fjordic systems and the coastal region to support aquaculture. Tools, including observations and hydrodynamic modelling, are described and put in context of sustainably managing aquaculture. Output from hydrodynamic ...
Image segmentation of underwater environment with inhomogeneous intensity turns out to be one of the most challenging topics these years. In this paper, we try to combine co-saliency detection with local statistical active contour model together for underwater image segmentation. The cluster-based algorithm ...
Water quality environmental parameters in the highly sensible and varying coastal regions concern societal relevant sectors such as aquaculture, fishing and tourism. Therefore, proper water quality and consequentially regular monitoring covering large spatial areas is of interest not only for scientist ...
The coastal zone is a challenging place to map, techniques for mapping the land cover and elevation do not work under water and methods for mapping the seabed cover and elevation work well in deep water but are dangerous and expensive in shallow water. As a result, detailed information in the shallow ...
Pancreas disease (PD) is one of the most serious infectious diseases of salmon caused by salmonid alphavirus (SAV), and can be transmitted over distance in marine environments. Vaccination has already proven to be an important management tool for prevention and control of infectious diseases in profitable ...
Underwater target recognition is a challenging task due to the unrestricted environment of the ocean. With large datasets, deep learning methods have been applied with great success to the image recognition of objects in the air. However, it has been observed that deep neural networks (DNNs) easily ...
Several design methods and principles have been proposed in the literature in order to guide the design of autonomous operations. Putting the required efforts into learning and using the methods is a daunting task, and experiences have shown that the use of methods meant to the help the design process ...
The fish farming industry is becoming widespread all over the world. By 2039 most of the fish we eat will come from the fish farming industry. In this work, we propose an autonomous robotic solution for indoor fish farming biomass estimation. Our proposed system moves silently on top of the tank borders ...