Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"jellyfish"”.
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Jellyfish Inspired Underwater Systems and Technologies
… and functions of traditional vehicles. A robotic jellyfish, inspired by the species Aurelia aurita was developed and characterized. In addition to the body of the main robotic vehicle, supporting technologies were developed including polymeric artificial muscles, hydrogel-based artificial …
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Underwater Robotic Propulsors Inspired by Jetting Jellyfish
… and smart actuation. In this thesis, jetting jellyfish were utilized as the inspiration to understand the fundamentals of this new form of propulsion and subsequently translate the understanding onto the engineered platform to validate the hypothesis and construct robust models. Jetting …
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The Impact of realistic galaxy orbits on jellyfish galaxy properties
… gas of galaxies. This process creates jellyfish galaxies with tails extending up to 100 kpc, and transforms star-forming spirals into quenched galaxies. The multiphase, magnetized and star-forming tails of jellyfish galaxies also serve as unique astrophysical laboratories. Cosmological …
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Modeling of Bio-inspired Jellyfish Vehicle for Energy Efficient Propulsion
Jellyfish have inhabited this planet for millions of years and are the oldest known metazoans that swim using muscles. They are found in freshwater sources and in oceans all over the world. Over millions of years of evolution, they have adapted to survive in a given environment. They are considered …
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The Immortal Jellyfish and Other Things That Don't Know About Love
… adoption, self-injury, and oceanic life. Jellyfish are a recurring image and theme, both the physical jellyfish itself and the mythological connection to Medusa. Jellyfish do not have brains, but they have developed complex stinging tentacles that for all their beauty make them dangerous. …
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Seasonal and lunar patterns of peach blossom jellyfish (Craspedacusta sowerbii) in Michigan
<p>The peach blossom jellyfish (Craspedacusta sowerbii) is the only freshwater medusa found in the United States, yet its distribution, abundance, and mechanisms of dispersal remain poorly understood. Given its uncertain status, understanding the ecology of this species is a priority. To …
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Factors influencing the occurrence of stinging jellyfish (Physalia spp.) at New Zealand beaches
… New Zealand beaches and are the primary cause of jellyfish stings to beachgoers each year. The identity of the species and the environmental factors that determine its presence are unknown. Lack of knowledge of many marine species is not unusual, as pelagic invertebrates often lack detailed …
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Trophic relevance of gelatinous zooplankton for commercial fisheries in the Irish Sea
Jellyfish can compete with fish for food resources, or feed on fish eggs and larvae. They also provide habitat and space for developing larval and juvenile fish which use their hosts as means of protection from predators and feeding opportunities. However, the broader ecological relevance of …
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Bloom or Bust: Retrospective Analysis of the Giant Jellyfish, <i>Nemopilema nomurai</i> (Scyphozoa: Rhizostomeae), Ecology in the East Asian Marginal Seas
<p>The Giant Jellyfish, <em>Nemopilema nomurai</em>, is a large-bodied bloom-forming jellyfish that occurs in the semi-enclosed basins of the East Asian Marginal Seas. <em>N. nomurai</em> has bloomed more frequently in the past 20 years than in any period previously recorded. In Japan, recent …
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Gelatinous zooplankton dynamics in Bantry Bay and the development of a harmful jellyfish forecast for the salmon aquaculture industry
… review the current state of the art on modelling jellyfish, develop an early warning system for a harmful jellyfish species, Muggiaea atlantica, which has been implicated in high mortality events of farmed salmon, and investigate the ecology of gelatinous zooplankton in detail. A literature review …
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A critical analysis investigating the process of a playwright with reference to Jellyfish, an original work for the stage
This dissertation is an exploration of the nature of playwriting, supported by an original full-length play. Researching playwriting can be problematic, as it is a balance between creativity and discipline, the conscious mind and the subconscious mind. Within the dissertation, we begin to …
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Design and Development of a Bio-inspired Robotic Jellysh that Features Ionic Polymer Metal Composites Actuators
… the design and development of a novel biomimetic jellyfish robot that features ionic polymer metal composite actuators. The shape and swimming style of this underwater vehicle are based on oblate jellyfish species, which are known for their high locomotive efficiency. Ionic polymer metal …
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SPATIAL AND TEMPORAL DYNAMICS OF THE CHESAPEAKE BAY SEA NETTLE
The jellyfish Chrysaora chesapeakei forms large summer blooms in Chesapeake Bay, and has substantial ecological and economic impacts on local ecosystems. Limited information on this species is mostly due to difficulties collecting spatial information on jellyfish in dynamic coastal ecosystems. …
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Locomotion and Control of Cnidarian-Inspired Robots
… the simple but efficient propulsion of large jellyfish to the rapid and highly maneuverable multi-jet propulsion of colonial animals known as siphonophores. This dissertation studies how these two extremes of underwater soft body propulsion are able to achieve simple yet effective control and …
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An experimental evaluation of data center topologies
… show the throughput results for the fat-tree and Jellyfish topologies using this implementation.
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La variabilité inter et intra-annuelle des méduses en Baie de Calvi
… decade, there has been a dramatic increase in jellyfish biomass all over the world. They are infamous for their negative effects on humans. Indeed, they interfere with the tourism by stinging swimmers, with the fishing by clogging nets, with the aquaculture by killing the fishes in net-pens and …
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Image Registration and Gantry Tracking System of Clytia hemisphaerica
… analysis of model organisms such as the jellyfish Clytia hemisphaerica. However, its size and rapid, free-swimming nature pose significant tracking challenges. This work presents a platform for the XY gantry system developed to overcome these hurdles for high-resolution behavioral …
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Design and Analysis of Biomimetic Medusa Robots
… was inspired by the form and functionality of Jellyfish. These natural organisms were chosen as bio-inspiration for a multitude of reasons including: efficiency, good room for payload, and a wide range of sizes and morphology. Shape memory alloy (SMA) actuators were selected as the primary …
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Robust Model-Based Control of Nonlinear Systems for Bio-Inspired Autonomous Underwater Vehicles
… control law is implemented in the control of a jellyfish-inspired autonomous underwater vehicle.
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Flow through and around fish farming nets
… with field measurements of a cage fouled with jellyfish. The measured data compared well with model predictions for the biofouled net. Flushing rates were calculated for both the clean and the biofouled net cases. When the net was changed from clean to biofouled, flushing time increased by up …
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