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 9 of 9 for “"Underwater sensing"”.
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Development of an acoustic telemetry platform for underwater sensing
… wireless communication in recent years, underwater wireless communication has not received the same focus, and unsolved problems remain in terms of power consumption, miniaturisation, and data rates in marine-based underwater wireless sensor networks. Currently, there are a variety of …
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Analog Underwater Backscatter: Networked Underwater Sensing at Microwatt Power Levels
We present Analog Underwater Backscatter (AUB), the first technology for microwatt-level underwater wireless sensor networks. AUB departs from past underwater backscatter technologies in that it encodes sensor data directly into the physical layer through analog (frequency) modulation. Our design …
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Autonomous data processing and behaviors for adaptive and collaborative underwater sensing
… I assisted the Shallow Water Autonomous Mine Sensing Initiative (SWAMSI)'11 experiment and demonstrated the viability of multi-static sonar tracking techniques for seabed and sub-seabed targets. By detecting the backscattered energy at the monostatic and several bi-static angles …
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High-resolution spatio-temporal quantification of fish predator-prey interactions over ecosystem scales with multispectral underwater sensing and optimality of human visual perception with natural daylight
… made with multispectral ocean acoustic remote sensing which enables instantaneous imaging of fish populations over thousands of square kilometers with average spatial resolution on the order of 100 m and temporal resolution of about 1 minute. Wide-area species classification and simultaneous …
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Battery-Free Subsea Internet-of-Things
… (e.g, Bluetooth, WiFi, GPS) cannot operate underwater, which has left 70% of our planet (the ocean) beyond their reach. In this thesis, I describe how we can change this reality by introducing IoT technologies that are inherently designed for the ocean. Specifically, I show how by rethinking …
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Mechanical and electrical characterization of carbon Black-doped closed-cell Polydimethylsiloxane (PDMS) foam
… (CB-PDMS) can be used as a pressure sensing material due to its piezoresistive properties. The sensitivity of such a sensor is in part dependent on the stiffness of the material. A closed-cell CB-PDMS foam is being explored as a possible flexible, lightweight, and waterproof …
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Decentralized sensor placement and mobile localization on an underwater sensor network with depth adjustment capabilities
… covered by water. It is widely believed that the underwater world holds ideas and resources that will fuel much of the next generation of science and business. Unfortunately, underwater operations are fraught with difficulty due to the absence of an easy way to collect and monitor data. In this …
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Comparison of the Role of Beamwidth in Biological and Engineered Sonar
… sonar is the dominating modality for underwater sensing. In biology, it is likely to have been a central factor behind the unprecedented evolutionary success of bats, a highly diverse group that accounts for over 20% of all mammal species. However, it remains unclear to what extent …
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Advanced modelling and analysis for quality assessment and enhancement of underwater multimodal imageries.
Underwater sensing plays a crucial role in environmental protection and sustainable energy transitions, supporting marine ecosystem monitoring, resource management, and infrastructure development. However, visual perception in underwater environments is significantly restricted by light absorption …