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Seminar: Sustainable Hard and Soft Measures for Coastal Protection
Dr. V. Sundar Professor Emeritus Department of Ocean Engineering Indian Institute of Technology Madras, India Any stretch of a coastline warrants protection measure when it experiences an erosion rate beyond a threshold value, and when the seasonal sediment transport/littoral drift changes fail to restore equilibrium. The causes for coastal erosion can either be natural, man-made or a combination of both. The natural causes include extreme storm events, action of waves on the coasts, Sea level rise due to climate change, etc. The man-made causes are often related to developmental activities such as construction of ports, fishing harbours, structures for wave
Seminar: Rethinking coral restoration; can we cultivate an entire coral reef?
Zac H. Forsman, PhD Researcher Hawaiʻi Institute of Marine Biology (HIMB) Coral restoration has evolved from small scale token efforts that often face heavy criticism for diverting resources away from underlying problems, to the last hope for entire geographic regions facing reef extinction. Coral reefs are highly sensitive to anthropogenic stress and there is growing concern that they may not survive the ongoing climate crisis, threatening the key role that coral reefs play in protecting shorelines, providing habitat for fisheries, sand for beaches, income from tourism, and priceless inherent natural value. Here I review efforts currently underway to cultivate corals, including micro-fragmentation, research
Seminar: Learning what tickles your flow from data
Benjamin Herrmann Research Associate Department of Mechanical Engineering at University of Washington Institute of Fluid Mechanics at Technische Universität Braunschweig Many fluid flows behave as selective amplifiers of external disturbances –where most perturbations are damped out, a few favored excitation patterns lead to largely amplified responses. Resolvent analysis is a technique to identify these most-responsive forcings along with the corresponding most-amplified responses, based on the governing equations of the system. Interest in the method has continued to grow during the past decade due to its potential to reveal structures in turbulent flows, and to guide sensor/actuator placement for flow control
Seminar: Pacific Shipyards International, Project Management in Ship Repair
Troy Keipper, PE Programs Vice President Pacific Shipyards International (PSI) Pacific Shipyards International is a locally owned and operated full-service shipyard in Hawaii, with long-standing roots to the region dating back to 1944. PSI is a substantial and integral part of the Navy’s efforts to maintain the active surface ships and submarines which are home ported in Pearl Harbor. Our customers include the U.S. Navy, U.S. Army, Coast Guard, Military Sealift Command National Oceanic & Atmospheric Association, University of Hawaii, and many commercial marine operators and contractors. PSI’s new shipyard facility, located within 5.3 miles of Pearl Harbor Naval Shipyard
Seminar: Understanding the Fundamentals of Vortex-induced Vibrations: Research Past, Present and Future
Deniz Gedikli, PhD Assistant Professor Ocean and Resources Engineering Department, University of Hawaii at Manoa Figure 1: Example offshore platforms that undergo VIV The canonical problem of fluid flow across an elastically mounted circular cylinder has been a widely studied problem in fluid mechanics due to the ubiquitous nature of the simple geometry in engineering applications and the resulting complexity of the fluid-structure interaction. In many engineering design and operation applications, it is advantageous to be able to predict fluid-structure interactions such as self-limiting vortex-induced vibrations, since these vibrations can strongly affect fatigue life or operational downtime in a variety
Seminar: The Global Ocean Biogeochemistry Array (GO-BGC), a sensor and platform network for the global ocean
Ken Johnson, Ph.D. Senior Scientist Monterey Bay Aquarium Research Institute The ocean is under threat from a variety of processes driven by increasing atmospheric carbon dioxide such as ocean warming, changing winds and currents, decreasing pH and oxygen, and less ice cover at high latitudes. However, vast areas of the open ocean are sampled from research ships for chemical and biological properties only once per decade or less, with sampling occurring mainly in summer. Our ability to detect changes in ocean chemical and biological processes that may be occurring are greatly hindered by this undersampling. Robotic platforms carrying chemical and
Seminar: Automating and IoTing coastal water quality sensors
Zoom Meeting ID______ 972 7385 3401 Passcode: ore792Phil Bresnahan, Ph.D. Assistant Professor Department of Earth and Ocean Sciences University of North Carolina Wilmington In this talk, I will discuss developments of chemical and physical sensors, ranging from very inexpensive and simple to much more expensive and complicated. Specifically, I will describe recent projects geared toward improving the accuracy of autonomous pH sensors, developing and distributing low-cost coastal temperature and wave motion sensors, and adding simple Internet of Things modems and data management systems to both. I strive to collaborate with local stakeholders, especially watersports enthusiasts (surfers, paddleboarders, sailors) and (shell)fisheries, in order to help protect coastal environments by improving access
SciEngComm Training: Sharing your science with non-experts. Tips and tools to help you communicate a meaningful message
Zoom Meeting ID______ 968 5388 9173 Passcode: ORE792Marcie Grabowski Outreach Specialist School of Ocean and Earth Science and Technology (SOEST) University of Hawai'i at Mānoa In this session, we’ll talk about why, where and how to communicate with non-experts about a field of study or the findings of your particular research. Considering the perspective and priorities of your audience is key to successfully and meaningfully communicating your message(s). We will discuss a couple tools and several guidelines to help distill a significant amount of information into a succinct and impactful message. There are a broad range of communication platforms available and individuals have various preferred styles. I
Seminar: Buoyancy controlled float swarms for distributed sensing in coastal waterways
Zoom Meeting ID______ 977 4017 0381 Passcode: meseminarTrevor Harrison, Ph.D. National Science Foundation Fellow Department of Mechanical Engineering University of Washington Abstract Buoyancy-controlled underwater floats have produced a wealth of in situ observational data from the open ocean. When deployed in large numbers, or ‘swarms’, floats offer a unique capacity to simultaneously map, in three-dimensions, environmental variables, such as currents, temperatures, and dissolved oxygen. This sensing paradigm is equally relevant in coastal waterways, yet remains underutilized due to economic and technical limitations of existing platforms. To that end, we have developed the microFloat, a buoyancy-controlled float designed specifically for the strong currents and density gradients observed in
Seminar: Bioinspired Propulsion and Sensing Systems Enabling Next Generation Underwater Vehicles
Zoom Meeting ID______ 944 3679 2959 Passcode: ore792Michael Krieg, PhD Assistant Professor Department of Ocean & Resources Engineering University of Hawai'i at Mānoa Even the most robust and sophisticated underwater robots pale in comparison to the performance of the ocean’s natural inhabitants, as many of which seem to traverse turbulent environments with ease and also demonstrate effective long range migration patterns. This talk analyzes a novel propulsion mechanism inspired by the locomotion of squid and jellyfish; whereby, finite fluid jets are ejected from a flexible internal cavity in a periodic fashion. Vortex ring formation, which is associated with expelled jets starting from rest, causes the thrust associated with this
Seminar: Wave runup, forecasting, and enhanced observations with a drone-mounted LiDAR
Zoom Meeting ID______ 935 4503 7290 Passcode: ore792Julia Fiedler, PhD Postdoctoral Scholar Scripps Institution of Oceanography University of California San Diego Storm wave run-up causes beach erosion, wave overtopping, and street flooding. Extreme runup estimates may be improved, relative to predictions from general empirical formulae with default parameter values, by using historical storm waves and eroded profiles in numerical runup simulations. For use in a local flood warning system, the relationship between incident wave energy spectra E(f) and SWASH-modeled shoreline water levels is approximated with the numerically simple integrated power law approximation (IPA), wherein broad and multi-peaked E(f) are accommodated by characterizing wave forcing with frequency-weighted integrals
MS Plan B Defense: Extreme wave height estimation from a global wave hindcast ensemble
Zoom Meeting ID______ 947 5656 0724 Passcode: OREAndi Erickson Graduate Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa Across the oceans, strong storms generate powerful waves that impact human activities such as commerce and design of coastal and offshore structures. To mitigate damages to these activities and to properly design infrastructures, it is imperative to understand the extreme wave climate. Previous works typically use a single dataset to describe the extreme wave climate. Here we analyze a comprehensive ensemble of 11 wave hindcasts most covering 30 years (1979-2016) to estimate extreme wave conditions at a commonly used return period of 100 years. To