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Established in this standard are criteria for variable selection, performance, design, and qualification of accident monitoring instrumentation for anticipated operational, design basis events and severe accidents.
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 frequency of storm surge impacts in western Alaska are likely to increase due to current warming trends leading to accelerated rates of erosion and further inland extent of marine inundation. This leaves the low-lying coastal communities of western Alaska vulnerable to storm surge hazards, especially because our ability to assess risk is hampered by large gaps in monitoring equipment and minimal...
An AML Oceanographic cabled ultraviolet (CUV) light was tested for effectiveness at preventing biofouling in an estuarine setting. The CUV was deployed twice at the US Geological Survey Pearl River site 02492620 at Stennis Space Center, Mississippi. One six week field deployment was during winter conditions (November 12th 2015 to January 5th 2016) and the other during summer conditions (June 8th to...
Continuous in-situ water quality monitoring methods have developed quickly during the 21st century and a wide selection of instruments for monitoring of different water quality parameters is now available. The usability and reliability of these devices is good and they provide new possibilities for oceanographical and limnological studies. Since 2006, we operated a buoy-based vertical profiler, which...
The effects of marine and instream energy devices on fish populations are not well-understood, and studying the behavior of fish around these devices is challenging. To address this problem, we have evaluated algorithms to automatically detect fish in underwater video and propose a semi-automated method for ocean and river energy device ecological monitoring. The key contributions of this work are...
In 2015, the Hanna Shoal region of the Chukchi Sea shallower than the 40 m isobath was withdrawn from outer continental shelf oil and gas exploration, a move the White House noted was designed to protect areas of “critical importance … for marine mammals, other wildlife, and wildlife habitat”. Arctic regions are projected to strongly manifest impacts of an altered climate and subsurface moored continuous...
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...
Fish-as-a-Service (FaaS) is a business-to-business model offering monitoring services performed by a biomimetic fishlike drone. FaaS considers environmental, scientific, and business concerns when addressing marine monitoring, providing alternative methodology while preserving ocean resources. The key to FaaS is the ability to provide a low-cost, low-maintenance, high-endurance, agile sensor platform...
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...
An increasing water to oil ration in the North Sea oil and gas production motivates for an optimization of the current deoiling facilities. Current facilities are operated on matured methodologies, which in most cases fulfill the government regulations. However, it has also observed that these solutions could be further improved. In order to more precisely monitor the deoiling operations, this study...
Planning and controlling autonomous vehicles requires one to be aware of the state of the vehicles and their configurations, the state of environment (obstacles, weather conditions), account for possible changes in mission requirements as well as hardware failures. Operations with multiple autonomous vehicles pose advantages in many scenarios but complicate even further the job of the human operator...
Mechanical systems operating in noisy environments create a challenging signal processing and monitoring problem especially in real-time. To detect a particular type of subsystem from noisy vibration data, it is necessary to identify signatures or particular features that make it unique. Resonant (modal) frequencies emitted during its normal operation satisfy this constraint. Monitoring structural...
Marine aquaculture is deeply rooted in Norwegian national economics and traditions, especially in the M⊘re og Romsdal region. This paper presents the development of a novel ROV for aquaculture inspection in marine application to provide first-hand information in fishery nets. The ROV is a part of so called “Sea Farm” project. When the ROV doesnot work, it will be carried by a floating platform. A...
The U.S. National Weather Service (NWS) operates an independent array of Tsunami Gauges in Alaska and California. NWS Tsunami Gauges are designed to provide real-time monitoring capability to assess the hazard potential of tsunamis. The gauges are developed at the U.S. National Tsunami Warning Center (NTWC) and encompass two distinct designs. The Alpha version utilizes a high precision radar sensor,...
Utilization of Autonomous Surface Vessel (ASV) technology on hydrographic surveys in the Arctic result in significant time savings to field operations while simultaneously improving safety and providing more capability.
Data and models show that Alaska waters are highly vulnerable to low saturation states of aragonite, an indicator of increasing ocean acidification conditions for this high-latitude region. With Alaskans heavily reliant on the ocean for their lives and livelihoods, both direct and indirect effects of ocean acidification (OA) could have serious implications on the species being harvested and the food...
Increased maritime shipping activity by larger ships is elevating the risk for maritime accidents and environmental impacts. Starting in 2004, these risks are being ameliorated by Automatic Identification System (AIS) technology. Similar to airplane transponders, AIS transmits a vessel's name, type, position, size, course, destination and speed several times a minute. This information is received,...
Shell Exploration & Production Company is working with academic, non-profit, and federal stakeholders in the Gulf of Mexico to develop and implement long term environmental offshore monitoring programs. One such program, started in 2008 between Shell and the National Oceanic and Atmospheric Administration, has expanded to include new collaborators working together to operate multiple underwater...
Ocean processes are of biological, geological, chemical or physical nature, occurring at micro — to kilometer scales, from less than seconds to centuries, turning the understanding and the sustainable management of the ocean into a multi-scale and multi-disciplinary effort. To address this variability with a cost-effective solution, the European FP7 project NeXOS has developed a new generation of...
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