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    Underwater Animal Monitoring Magnetic Sensor System

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    Name:
    Master_Thesis_Altynay_Kaidarova_UAMMS_final (2).pdf
    Size:
    5.116Mb
    Format:
    PDF
    Description:
    Final MS Thesis
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    Type
    Thesis
    Authors
    Kaidarova, Altynay cc
    Advisors
    Kosel, Jürgen cc
    Committee members
    Berumen, Michael L. cc
    Ooi, Boon S. cc
    Program
    Electrical and Computer Engineering
    KAUST Department
    Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
    Date
    2017-10
    Embargo End Date
    2018-11-01
    Permanent link to this record
    http://hdl.handle.net/10754/626069
    
    Metadata
    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2018-11-01.
    Abstract
    Obtaining new insights into the behavior of free-living marine organisms is fundamental for conservation efforts and anticipating the impact of climate change on marine ecosystems. Despite the recent advances in biotelemetry, collecting physiological and behavioral parameters of underwater free-living animals remains technically challenging. In this thesis, we develop the first magnetic underwater animal monitoring system that utilizes Tunnel magnetoresistance (TMR) sensors, the most sensitive solid-state sensors today, coupled with flexible magnetic composites. The TMR sensors are composed of CoFeB free layers and MgO tunnel barriers, patterned using standard optical lithography and ion milling procedures. The short and long-term stability of the TMR sensors has been studied using statistical and Allan deviation analysis. Instrumentation noise has been reduced using optimized electrical interconnection schemes. We also develop flexible NdFeB-PDMS composite magnets optimized for applications in corrosive marine environments, and which can be attached to marine animals. The magnetic and mechanical properties are studied for different NdFeB powder concentrations and the performance of the magnetic composites for different exposure times to sea water is systematically investigated. Without protective layer, the composite magnets loose more than 50% of their magnetization after 51 days in seawater. The durability of the composite magnets can be considerably improved by using polymer coatings which are protecting the composite magnet, whereby Parylene C is found to be the most effective solution, providing simultaneously corrosion resistance, flexibility, and enhanced biocompatibility. A Parylene C film of 2μm thickness provides the sufficient protection of the magnetic composite in corrosive aqueous environments for more than 70 days. For the high level performance of the system, the theoretically optimal position of the composite magnets with respect to the sensing direction of the sensor has been estimated using finite element modeling software. The magnetic sensing system has been practically implemented for monitoring the belly size of a model fish and for monitoring the behavior of the largest living bivalve, giant clam (Tridacna maxima) in an aquarium. In both of these experiments, the sensing system showed a high performance, indicating its potential for novel marine monitoring applications.
    Citation
    Kaidarova, A. (2017). Underwater Animal Monitoring Magnetic Sensor System. KAUST Research Repository. https://doi.org/10.25781/KAUST-U5073
    DOI
    10.25781/KAUST-U5073
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-U5073
    Scopus Count
    Collections
    MS Theses; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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