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Management of oceanographic data is particularly challenging due to the variety of protocols for data collection and analysis and the vast range of oceanographic variables studied. This paper describes the end-to-end cyber infrastructure developed to support stakeholders in the ocean science community throughout the data life cycle: from immediately after data collection through numerical analysis...
Underwater imaging has become a staple tool used by scientists exploring the deep ocean. Advanced camera systems are able to combine quantitative measurements from in-situ sensors with qualitative imaging to provide high fidelity multi-dimensional datasets which can be used to support a wide range of science questions. This includes benthic characterization and mapping, identification of biota and...
Design of a laboratory scale wave energy converter (WEC) system based on planar double-sided permanent magnet linear generator (PMLG) is considered in this paper. The detail procedure in designing the PMLG is reported including analytical work and experimental testing. The main objective is to create a simple and easy procedure in the design and optimize the detailed parameters to achieve the aimed...
Many different sensors have been installed on board vessels, a new framework is urgently needed to form a Common Operational Picture (COP), to assist the on-board operations and onshore analysis. In this paper, based on the Visual Analytics framework, we present a spatiotemporal dimension reduction method based on a real world case of oil combat operation. With our prototype, we show that how dimension...
This paper proposes a novel framework for detecting and localizing the transients corresponding to the shocks created by sediment impacts on a steel plate. Based on unsupervised hierarchical agglomeration of complex vibration spectra, the derived classification is available for bedload transport monitoring stations in underwater environement.
The presence of unexploded ordnance (UXO), also referred to as munitions, in the nearshore environment constitutes a risk for the public. Studies of munitions mobility carried out on the foreshore (swash zone) are scarce requiring further analysis. Investigation of munitions mobility/burial through field experiments requires the use of realistic surrogates. This paper focuses on the development of...
This paper develops a distributed sensor scheduling methodology that utilizes target classification decisions to govern the number of active sensors selected around the target in the deployment region. This approach utilizes a distributed supervisor on each sensor node to control the multi-modal operating state of the node. A distributed sensor selection method is proposed that dynamically adjusts...
Development of an autonomous unmanned surface vehicle (USV) that may serve as a mother ship for a small unmanned aerial vehicle (UAV) and a small autonomous underwater vehicle (AUV), in support of surface autonomy in sensing and surveillance missions, is described. The USV development includes implementation of low-level controls, stereovision perception, and a task-oriented high-level planner, which...
This work assesses the ability of tidal resources at two locations in the Western Pacific to supply enough power to support persistent oceanographic sensing equipment. We consider the extraction of energy in (1) the three Indonesian straits of Lombok, Ombai, and Timor, and (2) the four Philippines straits of Mindoro, Panay, Tablas, and Dipolog via a small-scale, bottom-mounted turbine. We then relate...
We present results from a series of tracer dye experiments where ocean plume concentration is measured using unmanned surface vessels. The goal of the study is to characterize the fine-scale spatiotemporal plume structure which is used for developing and evaluating autonomous robotic sampling strategies. We present a description of the qualitative characteristics of experimentally generated marine...
In this paper, we present a novel approach for the sensing of erosive cavitation phenomena in underwater facilities. Cavitation phenomena are known for their destructive capacity of underwater structures and are caused by the pressure decreasing followed by an implosion when the cavitation bubbles find an adverse pressure gradient. Conventional cavitation detection techniques are based on passive...
A known characteristic of the Tropical Pacific is the interaction between the zonal winds and the equatorial thermocline, which allows coupled variability like ENSO to evolve. However, this fundamental feedback is the least understood and most poorly modeled element of the tropical climate system. To increase our knowledge of the mechanisms controlling this feedback process, NOAA's National Data Buoy...
This paper focuses on the inspection for sloping dam wall by a remotely operated vehicle (ROV). First, a dedicated ROV for dam inspection is described. Second, a fixed-distance tracking control strategy is proposed to guarantee the fixed camera-to-subject distance in sloping dam inspection, which is instrumental in sonar image fusion for the large-scale dam wall with a certain inclination. In addition,...
This work presents the lessons learned and critical updates to the Research Oriented Underwater Glider for Hands-on Investigative Engineering (ROUGHIE). The open water testing experience with the original ROUGHIE provides key insight to design and operation of small scale autonomous underwater vehicles. This paper is organized to share necessary considerations that will be crucial for future vehicle...
The QARTOD methodology of a standard sequential string of tests on individual measurements has high applicability to constrained data systems. The QARTOD methodology has the benefit of a coherent and replicable test structure that enables relatively easy expansion into new measurements. However, as data streams become more complex the series of tests described becomes increasingly difficult to analyse...
An emerging environmental issue for the world's oceans is the accumulation of plastic debris on or near the ocean surface. A novel collaboration between The Ocean Cleanup foundation and Teledyne Optech — an aerial survey with the Optech CZMIL system, data processing and analysis — is expected to provide initial volume estimates for future debris collection by The Ocean Cleanup.
This paper proposes and implements a convolutional neural network (CNN) that maps images from a camera to an error signal to guide and control an autonomous underwater vehicle into the entrance of a docking station. The paper proposes to use an external positioning system synchronized with the vehicle to obtain a dataset of images matched with the position and orientation of the vehicle. By using...
Ocean Networks Canada (ONC) is a not-for-profit society that operates and manages innovative cabled observatories which supply continuous power and Internet connectivity to scientific instruments located in coastal, deep-ocean, and Arctic environments. The data from the instruments are archived, quality-controlled, and made freely available to researchers, educators, and the public. The Oceans 2.0...
The Autonomous Surface / Sub-surface Survey System (ASSSS) research program combines long endurance autonomous surface vessels (ASVs) and long endurance autonomous underwater vehicles (AUVs) to create an integrated cooperative navigation system effectively transforming the capabilities and accuracy of AUV survey. ASV is leading the project, working alongside National Oceanography Centre, a world leading...
There is a possibility that vast amounts of undersea resources are buried beneath Japanese territorial sea. In order to find these undersea resources, a detailed topography including specific objects and events of seabed should be carefully surveyed. One of effective methods for this is to use seabed visualization technologies, which are applied to an autonomous underwater vehicle (AUV). Therefore,...
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