Results 11 to 20 of about 10,835 (263)

A method of studying trawl models in the experimental station of the faculty of sea fisheries and food technology [PDF]

open access: yesActa Ichthyologica et Piscatoria, 1986
Techniques of measurements and underwater observations of models of trawls and other fishing gear in a lake, with the use of a motor catamaran, are presented.
Z. Kwidziński
doaj   +3 more sources

Energy Harvesting Hybrid Acoustic-Optical Underwater Wireless Sensor Networks Localization

open access: yesSensors, 2017
Underwater wireless technologies demand to transmit at higher data rate for ocean exploration. Currently, large coverage is achieved by acoustic sensor networks with low data rate, high cost, high latency, high power consumption, and negative impact on ...
Nasir Saeed   +3 more
doaj   +1 more source

Underwater Communication Using UAVs to Realize High-Speed AUV Deployment

open access: yesRemote Sensing, 2021
To monitor ocean and seafloor properties in detail, sensors are generally installed on autonomous underwater vehicles (AUVs). An AUV cannot accurately determine its absolute position and needs to communicate with a sea-surface vehicle.
Yusuke Yokota, Takumi Matsuda
doaj   +1 more source

Sensor Modeling for Underwater Localization Using a Particle Filter

open access: yesSensors, 2021
This paper presents a framework for processing, modeling, and fusing underwater sensor signals to provide a reliable perception for underwater localization in structured environments.
Humberto Martínez-Barberá   +2 more
doaj   +1 more source

Passive Underwater Target Tracking: Conditionally Minimax Nonlinear Filtering with Bearing-Doppler Observations

open access: yesSensors, 2020
The paper presents an application of the Conditionally-Minimax Nonlinear Filtering (CMNF) algorithm to the online estimation of underwater vehicle movement given a combination of sonar and Doppler discrete-time noisy sensor observations.
Andrey Borisov   +3 more
doaj   +1 more source

Salmon behavioural response to robots in an aquaculture sea cage [PDF]

open access: yesRoyal Society Open Science, 2020
Animal–robot studies can inform us about animal behaviour and inspire advances in agriculture, environmental monitoring and animal health and welfare.
M. Kruusmaa   +4 more
doaj   +1 more source

Underwater Vehicle Navigation Using Diffusion-Based Trajectory Observers [PDF]

open access: yesIEEE Journal of Oceanic Engineering, 2007
This paper addresses the issue of estimating underwater vehicle trajectories using gyro-Doppler (body-fixed velocities) and acoustic positioning signals (earth-fixed positions). The approach consists of diffusion-based observers processing a whole trajectory segment at a time, allowing the consideration of important practical problems such as different
Jouffroy, J, Opderbecke, Jan
openaire   +2 more sources

A Minimal Metric for the Characterization of Acoustic Noise Emitted by Underwater Vehicles

open access: yesSensors, 2020
Underwater robots emit sound during operations which can deteriorate the quality of acoustic data recorded by on-board sensors or disturb marine fauna during in vivo observations.
Giacomo Picardi   +4 more
doaj   +1 more source

MITIGATING IMAGE RESIDUALS SYSTEMATIC PATTERNS IN UNDERWATER PHOTOGRAMMETRY [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Systematic errors may result from the adoption of an incomplete functional model that is not able to properly incorporate all the effects involved in the image formation process.
F. Menna, E. Nocerino, S. Ural, A. Gruen
doaj   +1 more source

Underwater Localization System Combining iUSBL with Dynamic SBL in ¡VAMOS! Trials

open access: yesSensors, 2020
Emerging opportunities in the exploration of inland water bodies, such as underwater mining of flooded open pit mines, require accurate real-time positioning of multiple underwater assets.
José Almeida   +5 more
doaj   +1 more source

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