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Title: Electromagnetic scattering from a periodic array of open-ended rectangular waveguide apertures.
Creator: Bohning, Terry., Florida Atlantic University, Helmken, Henry, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: In this dissertation, the Radar Cross Section (RCS) of a large periodic array of rectangular open-ended waveguide apertures is determined numerically using several methods. The aperture boundaries are presumed to be Perfect Electrical Conductors (PEC). Although the problems of radiation from such a waveguide array and of aperture array scattering have been treated in the literature, the problem of scattering from an array of waveguide apertures does not appear to have been solved before....
Show moreIn this dissertation, the Radar Cross Section (RCS) of a large periodic array of rectangular open-ended waveguide apertures is determined numerically using several methods. The aperture boundaries are presumed to be Perfect Electrical Conductors (PEC). Although the problems of radiation from such a waveguide array and of aperture array scattering have been treated in the literature, the problem of scattering from an array of waveguide apertures does not appear to have been solved before. Considering the case of an array with constituent guides of semi-infinite length, the RCS is computed by several numerical methods based on the Integral Equation (IE) method, a least-squared error minimization technique referred to as Squared Field Error (SFE) method, direct solution of a surface integral equation, the Spectral Domain Method, and by using waveguide modes computed via the Finite Element Method (FEM). The case of finite-length guides is also treated using the IE and SFE methods. The results of these methods are compared with experimental data obtained from an outdoor RCS range. In order to simulate the semi-infinite case, the finite-length waveguides were terminated with radar absorbing foam so that nearly all reflection occurred at the apertures impinged upon by the incident plane wave. For all the methods cited, the infinite array approximation (cell-to-cell field periodicity except for a linear progressive interelement phase shift) is assumed to hold. A derivation of Floquet modes which implement this "phase-periodic" boundary condition is provided in an appendix, where an incidental discussion concerning the scalar and vector Laplacian operators is also furnished. A description of the structure and user interface of the software which has been written to implement the various methods is also given. The purposes of major subroutines and data structures are also delineated and several control-flow diagrams are included. As a foundation to extend the present work to analysis of the electromagnetic fields within an absorber coated PEC waveguide, a brief survey and a discussion of related work is provided.
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Date Issued: 1992
PURL: http://purl.flvc.org/fcla/dt/12308
Subject Headings: Wave guides, Electromagnetic fields
Format: Document (PDF)

Title: Time-domain finite-difference analysis of electromagnetic scattering and penetration problems.
Creator: Bemmel, Vincent Egbert., Florida Atlantic University, Sadiku, Matthew
Abstract/Description: The complexity involved in using analytical techniques in solving electromagnetic problems can be avoided by simulating Maxwell's differential equations by finite difference equations, which are easily solved by iteration. In this work some algorithms were developed in order to investigate plane waves as they travel through a certain medium and interact with objects, resulting in scattering and/or penetration. The numerical results were found to be in good agreement with analytical results...
Show moreThe complexity involved in using analytical techniques in solving electromagnetic problems can be avoided by simulating Maxwell's differential equations by finite difference equations, which are easily solved by iteration. In this work some algorithms were developed in order to investigate plane waves as they travel through a certain medium and interact with objects, resulting in scattering and/or penetration. The numerical results were found to be in good agreement with analytical results for tractable cases.
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Date Issued: 1987
PURL: http://purl.flvc.org/fcla/dt/14422
Subject Headings: Electromagnetic fields, Maxwell's equations
Format: Document (PDF)

Title: ATTITUDE MEASURING SENSOR FOR A TOWED BODY.
Creator: Flitton, Garrett, Dhanak, Manhar, Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
Abstract/Description: The Design and Development of a remote attitude-measuring sensor package (RASP) for use onboard an underwater tow fish to analyze its dynamic movement while towing is described. The RASP will be used to determine the orientation, acceleration, and gyroscopic attitude of the tow fish. The collection of this data is important for understanding the trim of the tow fish under different towing conditions behind a manned surface vessel or unmanned underwater vehicle. The trim data acquired will...
Show moreThe Design and Development of a remote attitude-measuring sensor package (RASP) for use onboard an underwater tow fish to analyze its dynamic movement while towing is described. The RASP will be used to determine the orientation, acceleration, and gyroscopic attitude of the tow fish. The collection of this data is important for understanding the trim of the tow fish under different towing conditions behind a manned surface vessel or unmanned underwater vehicle. The trim data acquired will inform the extent to which post-processing of collected three-axis electromagnetic field data would be required. The RASP has been analyzed in the laboratory with a mechanical testing rig that was designed and built to validate the accuracy and performance of the entire sensor package system. The developed package will aid in the assessment of the performance of the tow fish in field operations with the sensor package implemented on the tow fish.
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Date Issued: 2024
PURL: http://purl.flvc.org/fau/fd/FA00014423
Subject Headings: Sensors, Marine towing, Electromagnetic fields
Format: Document (PDF)

Title: EFFECTIVENESS OF A MAGNETIC SHARK DETERRENT.
Creator: Jones, Laura, Kajiura, Stephen, Florida Atlantic University, Department of Marine Science and Oceanography, Charles E. Schmidt College of Science
Abstract/Description: This study examined the effectiveness of a magnetic shark deterrent, the SharkBanz® Zeppelin, and quantified the magnetic field it produces. A shark entering the magnetic field induces an electric field that is detectable by electroreceptors. This novel stimulus may deter sharks away from hooked fish. The magnitude declined rapidly with distance and reached the ambient geomagnetic field at 36-39 cm away. Zeppelin devices and non-magnetic controls were deployed with baited remote underwater...
Show moreThis study examined the effectiveness of a magnetic shark deterrent, the SharkBanz® Zeppelin, and quantified the magnetic field it produces. A shark entering the magnetic field induces an electric field that is detectable by electroreceptors. This novel stimulus may deter sharks away from hooked fish. The magnitude declined rapidly with distance and reached the ambient geomagnetic field at 36-39 cm away. Zeppelin devices and non-magnetic controls were deployed with baited remote underwater video systems, and the responses of sharks were recorded. There was a significant difference between the number of sharks deterred between the Zeppelin and control. The Zeppelin deterred sharks on 22% of their approaches in the effective range, whereas the control deterred them on 2.6% of their approaches. Although the device may be effective at deterring sharks and act as a mitigation strategy for shark depredation, tests with live fish that provide more sensory stimuli are needed.
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Date Issued: 2024
PURL: http://purl.flvc.org/fau/fd/FA00014556
Subject Headings: Sharks, Elasmobranchs, Magnetic fields, Electromagnetics
Format: Document (PDF)

Title: Analysis of the performance of a loop radiator and a spiral applicator at low RF frequencies.
Creator: Roman, John M., Florida Atlantic University, Ungvichian, Vichate, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: This thesis addresses the electromagnetic analyses of two structures. The first structure, a low frequency loop antenna recommended for use by national standards on electromagnetic compatibility (EMC), is incorrectly specified to have the same voltage to magnetic field conversion ratio (antenna factor) when used with a 50 ohm receiver in lieu of a high impedance type ($>$600 ohm). Two independent measurement sets were performed to demonstrate the prevailing discrepancy, and a corrected...
Show moreThis thesis addresses the electromagnetic analyses of two structures. The first structure, a low frequency loop antenna recommended for use by national standards on electromagnetic compatibility (EMC), is incorrectly specified to have the same voltage to magnetic field conversion ratio (antenna factor) when used with a 50 ohm receiver in lieu of a high impedance type ($>$600 ohm). Two independent measurement sets were performed to demonstrate the prevailing discrepancy, and a corrected antenna factor is presented for use with a 50 ohm receiver. The second structure, a partial spiral "pancake" applicator used to generate high EM fields in its vicinity, was evaluated for its (induction) reactive near-field electromagnetic characteristics. Construction of an induction zone measurement system including the development of an electrically small electric field is described. Measured data on three dimensional EM field contours over the face of the applicator, are presented.
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Date Issued: 1998
PURL: http://purl.flvc.org/fcla/dt/15535
Subject Headings: Radio--Antennas--Design and construction, Electromagnetic fields, Electromagnetic measurements
Format: Document (PDF)

Title: Analytical and experimental evaluation of the magnetic fields induced by buried and overhead high-voltage power-lines.
Creator: Lordan, Richard Joseph., Florida Atlantic University, Neelakanta, Perambur S., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: This thesis is concerned with the measurement of magnetic field components induced above the earth's surface by three classes of high-voltage power transmission lines supplemented by algorithmic formulations: The first system refers to three-phase lines housed in a plastic (PVC) conduit, buried directly in the soil or encased in a concrete duct. The second category refers to a similar buried system, but encased in an iron/steel pipe. The third transmission line is an overhead three-phase...
Show moreThis thesis is concerned with the measurement of magnetic field components induced above the earth's surface by three classes of high-voltage power transmission lines supplemented by algorithmic formulations: The first system refers to three-phase lines housed in a plastic (PVC) conduit, buried directly in the soil or encased in a concrete duct. The second category refers to a similar buried system, but encased in an iron/steel pipe. The third transmission line is an overhead three-phase system. Using boundary-value approach, approximate (closed-form) expressions are obtained for the magnetic field above the earth's surface caused by each of the systems indicated. Calculated results are compared with experimental data compiled from field experiments.
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Date Issued: 1990
PURL: http://purl.flvc.org/fcla/dt/14660
Subject Headings: Electric lines--Environmental aspects, Electromagnetic fields--Measurement, Electric fields--Measurement
Format: Document (PDF)

Title: DESCRIPTIVE EXPLORATORY STUDY OF INDIVIDUALS’ USE OF PULSED ELECTROMAGNETIC FIELDS, THE MICRO-PULSE, FOR PAIN RELIEF.
Creator: Ravid, Stacey, Barry, Charlotte, Florida Atlantic University, Christine E. Lynn College of Nursing
Abstract/Description: Pain has caused innumerable suffering to countless individuals and has impacted their lives in profound ways. There are many detrimental effects of pain including decreased ability to work, depression, isolation, increased pharmaceutical use, and addiction. Pain, on a worldwide scale, remains ineffectively treated and alternative solutions for managing pain are needed. Pain is conventionally treated with pharmaceuticals, primarily narcotics. Continuation of medications for these painful...
Show morePain has caused innumerable suffering to countless individuals and has impacted their lives in profound ways. There are many detrimental effects of pain including decreased ability to work, depression, isolation, increased pharmaceutical use, and addiction. Pain, on a worldwide scale, remains ineffectively treated and alternative solutions for managing pain are needed. Pain is conventionally treated with pharmaceuticals, primarily narcotics. Continuation of medications for these painful conditions often causes dependence and addiction. The pain and narcotics cycle contributes to the opioid epidemic. The cost in human lives is immense. Pulsed Electromagnetic Field (PEMF) is a holistic modality used for various ailments. This exploratory descriptive research study focused on the experience of individuals using the Micro-Pulse, PEMF, for pain relief. The mind/body connection was a foundation of the holistic theoretical framework for this study. The theoretical grounding for this study was Watson’s (2018) theory of human caring, which is based on a foundation of holistic healing incorporating mind, emotional body, physical body, and spirit for treatment of pain. Understanding an individual’s experience of pain relief will potentially raise awareness and promote the exploration of holistic therapeutic approaches for patients in pain.
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Date Issued: 2019
PURL: http://purl.flvc.org/fau/fd/FA00013341
Subject Headings: Electromagnetic fields, Pain relief, Pain Management--methods, Holistic medicine, Mind and body--Health aspects
Format: Document (PDF)

Title: The directionality of noise created by turbulent flow over roughness.
Creator: Kaufman, Gerard P., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: Flow over a rough surface is known to radiate sound as a dipole source that is directional. In order to better understand this source, measurements are being made in a wind tunnel using a microphone array. The measurements collected by a microphone array are beamformed to give a source image and can be deconvolved with an assumed point spread function in order to obtain the source levels. This thesis considers alternative analysis algorithms that can be used to analyze wind tunnel data. Only...
Show moreFlow over a rough surface is known to radiate sound as a dipole source that is directional. In order to better understand this source, measurements are being made in a wind tunnel using a microphone array. The measurements collected by a microphone array are beamformed to give a source image and can be deconvolved with an assumed point spread function in order to obtain the source levels. This thesis considers alternative analysis algorithms that can be used to analyze wind tunnel data. Only numerical examples of how these algorithms work will be presented and the analysis of real data will be considered in later studies. It will be shown how estimates can be made of the source directivity by comparing the measured data with a theoretical source model and minimizing the error between the model and the measurements.
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Date Issued: 2011
PURL: http://purl.flvc.org/FAU/3171394
Subject Headings: Electromagnetic fields, Signal processing, Digital techniques, Noise control, Adaptive signal processing, Acoustic emission, Measurement
Format: Document (PDF)

Title: Effects of power line (60 Hz) electromagnetic fields on protein phosphorylation in the yeast Saccharomyces cerevisiae.
Creator: Ross, Mary Alice, Florida Atlantic University, Binninger, David
Abstract/Description: Epidemiological studies have suggested that 60 Hz AC electromagnetic fields (EMF) generated by power lines might play a role in the increased incidence of certain human cancers, especially in children. Previous studies with human cells indicate that one molecular mechanism may involve differential effects on protein phosphorylation. The aim of this thesis was to determine whether 60 HZ EMF also affect phosphorylation in the yeast Saccharomyces cerevisiae which has been developed into a...
Show moreEpidemiological studies have suggested that 60 Hz AC electromagnetic fields (EMF) generated by power lines might play a role in the increased incidence of certain human cancers, especially in children. Previous studies with human cells indicate that one molecular mechanism may involve differential effects on protein phosphorylation. The aim of this thesis was to determine whether 60 HZ EMF also affect phosphorylation in the yeast Saccharomyces cerevisiae which has been developed into a paradigm for molecular biologists. The data presented in this thesis show that protein phosphorylation is indeed altered in yeast in response to 60 Hz EMF. This work validates yeast as an experimental model for more in depth investigation of the molecular and genetic basis of this response. Insight gained from these studies should shed light on the interaction of power line EMF with human cells and its possible role in development of human cancers.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15145
Subject Headings: Electric lines--Health aspects, Electromagnetic fields--Health aspects, Saccharomyces cerevisiae
Format: Document (PDF)

Title: Molecular analysis of two yeast genes whose expression is induced by power line electromagnetic fields.
Creator: Busch, Annette., Florida Atlantic University, Binninger, David
Abstract/Description: It has been suggested that 60 Hz electromagnetic fields (EMF) from power lines might present a health hazard to humans. Toward understanding the molecular mechanisms, two genes--EMF-A and EMF-B--had been tentatively identified in Saccharomyces cerevisiae as being responsive to EMF. The aim of this thesis was to confirm that EMF-A and EMF-B were convincingly and reproducibly inducible by 60 Hz EMF. The results confirmed that expression of both genes was induced following exposure to 60 Hz EMF....
Show moreIt has been suggested that 60 Hz electromagnetic fields (EMF) from power lines might present a health hazard to humans. Toward understanding the molecular mechanisms, two genes--EMF-A and EMF-B--had been tentatively identified in Saccharomyces cerevisiae as being responsive to EMF. The aim of this thesis was to confirm that EMF-A and EMF-B were convincingly and reproducibly inducible by 60 Hz EMF. The results confirmed that expression of both genes was induced following exposure to 60 Hz EMF. DNA sequence analysis of these genes showed a nearly perfect match to two Saccharomyces cerevisiae genes in the GenBank DNA database. The available data indicates that while both genes have been previously identified in other laboratories, precise identification of their biological functions has not been established. The cloned genes will provide valuable molecular probes for the ongoing research into the biological effects of power line EMF.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15116
Subject Headings: Electromagnetic fields--Health aspects, Electric lines--Health aspects, Saccharomyces cerevisiae, Nucleotide sequence
Format: Document (PDF)

Electromagnetic fields (6)	+ -
Electric lines--Health aspects (2)	+ -
Electromagnetic fields--Health aspects (2)	+ -
Saccharomyces cerevisiae (2)	+ -
Acoustic emission (1)	+ -

Adaptive signal processing (1)	+ -
Digital techniques (1)	+ -
Elasmobranchs (1)	+ -
Electric fields--Measurement (1)	+ -
Electric lines--Environmental aspects (1)	+ -
Electromagnetic fields--Measurement (1)	+ -
Electromagnetic measurements (1)	+ -
Electromagnetics (1)	+ -
Holistic medicine (1)	+ -
Magnetic fields (1)	+ -
Marine towing (1)	+ -
Maxwell's equations (1)	+ -
Measurement (1)	+ -
Mind and body--Health aspects (1)	+ -
Noise control (1)	+ -
Nucleotide sequence (1)	+ -
Pain Management--methods (1)	+ -
Pain relief (1)	+ -
Radio--Antennas--Design and construction (1)	+ -
Sensors (1)	+ -
Sharks (1)	+ -
Signal processing (1)	+ -
Wave guides (1)	+ -

Florida Atlantic University (9)	+ -
College of Engineering and Computer Science (5)	+ -
Department of Computer and Electrical Engineering and Computer Science (3)	+ -
Binninger, David (2)	+ -
Department of Ocean and Mechanical Engineering (2)	+ -

Barry, Charlotte (1)	+ -
Bemmel, Vincent Egbert. (1)	+ -
Bohning, Terry. (1)	+ -
Busch, Annette. (1)	+ -
Charles E. Schmidt College of Science (1)	+ -
Christine E. Lynn College of Nursing (1)	+ -
Department of Marine Science and Oceanography (1)	+ -
Dhanak, Manhar (1)	+ -
Flitton, Garrett (1)	+ -
Helmken, Henry (1)	+ -
Jones, Laura (1)	+ -
Kajiura, Stephen (1)	+ -
Kaufman, Gerard P. (1)	+ -
Lordan, Richard Joseph. (1)	+ -
Neelakanta, Perambur S. (1)	+ -
Ravid, Stacey (1)	+ -
Roman, John M. (1)	+ -
Ross, Mary Alice (1)	+ -
Sadiku, Matthew (1)	+ -
Ungvichian, Vichate (1)	+ -

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