Browsing Electronic & Electrical Eng (Theses and Dissertations) by Date of Publication
Now showing items 1-20 of 125
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Effect of electric field on the polarised infrared spectra of smectic liquid crystals
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2000)In this research Fourier Transform Infrared Spectroscopy has been used to investigate the effect of the polarised infrared beam and the electric field on the orientational behaviour of the ferroelectric and antiferroelectric ... -
Efficient methods for the computation of high frequency electromagnetic wave scattering from piecewise smooth surfaces using the integral equation formulation
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2000)The motivation for this work is the need for rigorous, efficient, accurate and robust computational methods for implementing deterministic radio wave propagation models to enable planners and operators make good use of UHF ... -
Fabrication of ultra-shallow boron junctions using proximity rapid thermal diffusion
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2000)This work presents proximity rapid thermal diffusion (RTD) as a technique for fabricating shallow p-type junctions for LDD devices. Boron-doped spin-on dopant (SOD) is used as a dopant source in proximity RTD. Fourier ... -
The application of digital signal processing to the modelling and alleviation of auditory impairment
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2001)This work is concerned with the development of digital signal processing models of the unimpaired and impaired human auditory system with a view towards the development of signal processing strategies for the alleviation ... -
Numerical methods for the high speed solution of integral equations in wireless communications
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2001)This thesis investigates the the appropriateness of integral equations for use in determining electric field coverage over sub-urban terrain which is illuminated by an arbitrarily placed transmitter. Sub-urban terrain is ... -
Algorithmic level low-power VLSI design applied to RGB to HSI conversion
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2001)The growing demand for portable applications such as cellular phones, portable digital assistants (PDAs) and notebooks has resulted in a requirement for integrated circuits (ICs) which consume less power while delivering ... -
Perceptually motivated audio time-frequency analysis
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2001)Fourier analysis has long been an indispensable tool for the investigation of signals whose frequency content does not change with time. It has likewise been of fundamental importance in engineering for the study of linear ... -
3-dimensional solder paste inspection using Structured Light techniques
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2002)Re-modelling of three-dimensional solder paste constructed from optical profilometry has gathered ever-increasing attention in different inspection and process control sectors of the electronics Printed Circuit Board ... -
A quasi three dimensional numerical model for terrain propagation
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2002)Numerical modeling techniques provide a powerful tool for the optimization of modern land mobile radio communications systems. Mathematically, propagation over terrain constitutes a three-dimensional vector field problem ... -
Segmentation of textured images on three-dimensional lattices
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2003)The development of supervised segmentation algorithms for textured images existing on three-dimensional (3-D) lattices is the central theme of this thesis. The current state of the art in 3-D segmentation has been reviewed, ... -
CMOS power estimation
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2003)The last decade has seen the inclusion of power consumption criteria in the list of design goals targeted by silicon designers and architects. Together with speed and area, low power is now a common part of a system ... -
Application of capacitive sensors to inverse problems in electrostatics
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2003)The electrostatic imaging problem is an inverse electrostatic problem Involving the reconstruction of an inhomogeneous dielectric medium from a set of remote electrostatic field measurements. In this thesis we propose ... -
Reconfigurable software radio systems
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2004)Software radio has been heralded as a significant evolutionary step for wireless technology as it allows dedicated analogue radio hardware to be replaced with flexible digital signal processing. Due to current technological ... -
The variational Bayes approach in signal processing
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2004)This thesis is concerned with Bayesian identification of parameters of linear models. Linear models are used in many important problems of Digital Signal Processing (DSP). Computationally efficient methods of parameter ... -
Dynamic properties of nanoparticle magnetic systems
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2004)This thesis is concerned with the study of the dynamic properties of magnetic nanoparticle fluids, which are an important class of physical systems where microscopic magneto-mechanical effects can be manifested. There are ... -
An indoor resource optimisation for TDMA incorporating a convex space building configuration and accurate ray-tracing
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2004)The contents of this work are designed for planning wireless telecommunication systems in indoor environments with application intended for time division multiple access (TDMA) systems. The term resource optimisation ... -
Reconfigurable OFDM systems
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2005)Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier wireless transmission technique. OFDM is used for robust, high quality and high data-rate music, voice, images, video, news and data broadcasts. It is ... -
High-level event detection in broadcast sports video
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2005)This thesis investigates semantic analysis of broadcast sports footage. A domain dependent sports video model is proposed. Under this model, the game semantics can be derived according to their relationship with the ... -
Wide-band dielectric spectroscopy of small-molecule glass-forming liquids and insulating thin films
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2005)This thesis describes the application of broadband dielectric spectroscopy in the frequency range 1 mHz - 1.8 GHz to two main topics; (i) the glass transition and relaxation features of supercooled liquids and glasses, ... -
Flexibility in ad hoc networks
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2005)This thesis represents a step forward in our understanding of what flexibility, adaptability and reconfigurability means at the network-layer of mobile, wireless, ad hoc networks. Mobile, wireless, ad hoc networks are ...
