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Near- and far-field thermal radiation in metamaterials and the development of NF-RT-FDTD algorithm
(2016-06)
In this dissertation, analysis of near-field regime of thermal radiative transfer in metamaterials supporting surface phonon polaritons (SPhPs) is given. Solutions of electromagnetic fields at subwavelength distances are ...
Diversity techniques for ultraviolet communications
(2016-08)
Strong molecular and aerosol scattering in ultraviolet (UV) wavelengths enable mechanisms where transmitter can communicate with the receiver in the absence of line of sight (LOS) link. Recent advances in solid state ...
Vulnerability of speaker verification system under replay spoofing attack and investigation of synthetic speech detection
(2016-05)
Security issues have become major subject along with developments in the speaker verification system. Previous studies have shown that performance is still not fully proven for vulnerability. Simple and easy methods may ...
Relay-assisted OFDM-based visible light communications
(2016-08)
In this study, a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source is investigated. Specifically, two light sources in an office space; one is ...
Gyroscopes based on acoustic waveguides
(2016-08)
We propose novel gyroscope architectures based on acoustic waves propagating in a waveguide. This thesis is composed of two parts. In the first part, the fundamentals of the proposed gyroscope are discussed. The new gyroscope ...
Enhanced unipolar OFDM based relay-assisted visible light communications
(2016-08)
Due to spectrum scarcity of the conventional radio frequency (RF) and the higher demand for wireless services, visible light communication (VLC) has emerged as a complementary solution to RF technology for ubiquitous ...
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