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Seminar: Approaching Residency of Marine Robots for Persistent Underwater Autonomy
Marine Science Building 114 1000 Pope Road, Honolulu, HI, United StatesDr. Zhuoyuan Song Assistant Professor Department of Mechanical Engineering University of Hawai'i, Manoa Persistent subsea exploration and monitoring are of vital significance in many fields including early tsunami warning, oceanography, marine biology, coastal safety, natural resource exploitation, and environmental preservation. An emerging frontier of marine robotics is the endeavor to achieve long-term residency of autonomous underwater vehicles. Supported by subsea infrastructures such as ocean observatories, resident autonomous underwater vehicles (RAUVs) can acquire power and cabled communication from off-shore docking stations. RAUV could provide prolonged dynamic measurements of the subsea environment and attend to emerging remote events promptly. This talk covers
Seminar: Exploring Offshore Marine Structures and Their Complex Dynamics: Current Status and Emerging Future Trends
POST 126 1680 East-West Road, Honolulu, HI, United StatesDr. Ersegun Deniz Gedikli Postdoctoral Fellow, NTNU Norwegian University of Science and Technology Technology, law and world’s appetite for more energy pushed oil-gas and renewable energy source exploration farther from the shores. Recent developments in this search have brought additional design challenges since these large offshore structures are more prone to the harsh environments around them. These factors require innovative approaches, in part because companies cannot operate in conventional ways in the Arctic region and in deep sea. This topic has critical importance to the offshore industry, particularly for the cost-effective development of new ocean structures such as floating offshore
Seminar joint with Oceanography: NOAA, Hydrography, and The Office of Coast Survey
Ensign Airlie Pickett Ensign Harper Umfress NOAA Ship Rainier Hydrography has been around for as long as people have been going to sea. Nautical charts serve as maps for the mariner, identifying shoal areas, wrecks, safe water, reefs, etc. They are the primary source of navigational information for all oceangoing vessels, and support billions of dollars in trade every year. The Office of Coast Survey and NOAA’s fleet of ships and small boats are responsible for the creation and maintenance of the nautical charts within US territorial waters. The science of hydrography has advanced rapidly over the past 100 years.
Seminar: The Push and Pull of Marine Technology
POST 723 1680 East-West Road, Honolulu, HI, United StatesRichard W. (Rick) Spinrad, PhD, CMarSci Professor of Oceans and Atmospheres, Oregon State University President at Marine Technology Society Former Chief Scientist at NOAA The evolution of marine technology is characterized by a balance of “requirements pull” and “capabilities push”. The most obvious driver for scientific/engineering advancement is the need for enhanced performance, in terms of cost, efficiency and safety. To this end, the traditional maritime industries and applications (e.g. oil and gas exploration, commercial fishing, marine transport, etc.) have fostered improvements in a range of areas such as dynamic positioning, acoustic sensors, imaging techniques, and data management. In parallel,
Seminar: NAVATEK: From Science to Application
Sakamaki B101 2530 Dole St, Honolulu, HI, United StatesCharlie Field MS, PE, Mechanical Engineering Navatek, LLC., Honolulu, HI Bradley Beeksma Ocean Engineer Navatek, LLC., Honolulu, HI Navatek is a leading innovation and science-driven small business with experience in modeling, simulation, design, construction, and testing of novel systems. As a growing company of over 130 employees, Navatek has corporate headquarters and a shipyard in Honolulu, and offices in Washington DC, South Kingstown RI, and Portland ME. In collaboration with universities, Department of Defense contractors, and the Office of Naval Research, Navatek excels in transitioning research and design into practical applications. Past and current projects at the company include lifting body
Seminar: Acoustics: From Cavitation to Detection in Clutter
Sakamaki B101 2530 Dole St, Honolulu, HI, United StatesJohn Allen, PhD Associate Professor Department of Mechanical Engineering University of Hawai’i, Mānoa Bubble dynamics and cavitation have had prominent roles in acoustics since Lord Rayleigh's pioneering work noise from ship propellers. Ocean applications are highlighted with respect to ambient noise produced from snapping shrimp off the coast of Hawaii. Snapping shrimp produce sounds by closing an enlarged claw rapidly, creating a cavitation bubble with a water jet. Snapping shrimp sound production has not been previously measured in natural environments with recording levels commensurate with the transient nature of the cavitation bubble sound. Previous field studies have investigated time averaged
Seminar: Investigating Helmholtz Mode for Marine Hydro-Kinetic Energy
Sakamaki B101 2530 Dole St, Honolulu, HI, United StatesReza Ghorbani, PhD Associate Professor Department of Mechanical Engineering University of Hawai'i, Mānoa Short relatively deep tidal basins, which are connected to the open sea by a narrow strait, may exhibit either an amplified (resonant), or damped (choked) response to the tide at the entrance. The sole mode added to this system when the basin communicates with a tidal sea through a narrow strait is the pumping or Helmholtz mode, characterized by a periodic mass exchange through the narrows and associated spatially uniform elevation change within the basin. This is generally also the most energetic mode of such a basin.
Seminar: Tsunami Warning – it’s easy when it works
Sakamaki B101 2530 Dole St, Honolulu, HI, United StatesLaura Kong, PhD Director, International Tsunami Information Center Effective early warning systems save lives. To be effective, there must be synergy among all levels of the warning system, with international, national, and community actions harmonized to affect a seamless warning and response chain —an end-to-end warning system from detection and threat analysis, alert dissemination, to safe evacuation by the public. If any part of this chain breaks, then the entire system fails. Warnings are most effective when there is continuous public awareness and preparedness that support appropriate public action. This talk will highlight lessons learned from past events and their
Seminar: Going Deep Into The Unknown
Sakamaki B101 2530 Dole St, Honolulu, HI, United StatesGlenn Carter, PhD Associate Professor Department of Oceanography University of Hawai’i, Mānoa The deep ocean trenches, or hadal zone, comprise the deepest 40% of the ocean's entire depth range and are one of the most inaccessible and poorly studied regions in the ocean. At the deepest point in the ocean the hydrostatic pressure reaches 16,000 psi. Very little is known about the circulation, mixing, chemical properties, and biological communities of the hadal water column. This dearth of knowledge largely stems from a lack of suitable instrumentation with which to make observations. We are in the process of designing and fabricating
Seminar: Feasibility Study for 50 10MW Floating Wind Turbines South of Oahu
Sakamaki B101 2530 Dole St, Honolulu, HI, United StatesShijie Huang David Leyva Cameron Morrow Lin Sun Offshore wind energy sites have been developed successfully all over the world, making it a mature and reliable technology for Hawai’i. Hawai’i has year-round trade winds that represent a steady source of renewable energy supply. The ORE 783 capstone class has conducted a feasibility study for the development of offshore wind around Oahu. Taking wind climate, wave climate, bathymetry and all other important factors into consideration, the class determined the site, platform type, cable route, and cost estimate for the development of offshore wind energy. Based on the projected costs for the
Seminar: Development of a solid state, dual pH and Total Alkalinity sensor for in situ monitoring of the seawater carbon dioxide system
Burns Hall 4005 1601 East-West Road, Honolulu, HI, United StatesDr. Ellen Briggs Post-Doctoral Researcher Scripps Institute of Oceanography A novel design is demonstrated for a solid state, reagent-less sensor capable of rapid and near simultaneous measurement of pH and Total Alkalinity (AT) using ion sensitive field effect transistor (ISFET) technology to provide a simplified means of characterization of the aqueous carbon dioxide system. ISFET-based pH sensors that achieve 0.005 precision are widely used in various oceanographic applications. A modified ISFET is demonstrated to perform a nL-scale acid-base titration of AT in under 40 s with an estimated precision of 2-10 μmol kg˗1. This method of measuring AT, a Coulometric
Seminar: Acoustic signal processing for tracking marine mammals
Biomed T 211 1960 East-West Road, Honolulu, HI, United StatesPina Gruden, PhD Post-Doctoral Researcher Joint Institute for Marine and Atmospheric Research Acoustics provides a useful tool to study various aspects of marine mammal biology, such as species identification, behaviour, habitat use, and abundance estimation. In order to answer these questions the acoustic information needs to be first extracted and processed from underwater recordings. This is a challenging task due to large volumes of data, noise and interfering signals present in the recordings. Moreover, multiple animals often vocalize at once, and their sounds are very diverse, further complicating the extraction and processing problem. This seminar will focus on a tracking