Electronic & Electrical Eng: Recent submissions
Now showing items 261-280 of 750
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Digital signal processing approaches to bird song analysis
(Trinity College Dublin. School of Engineering. Discipline of Electronic & Elect. Engineering, 2017)The ability to automatically analyze bird vocalizations would provide major assistance to zoologists in their behavioral and ecological studies. Revisions of taxonomy need to be made in cases where a population of species ... -
Isolating neural indices of continuous speech processing from multivariate neural data
(Trinity College Dublin. School of Engineering. Discipline of Electronic & Elect. Engineering, 2017)The human ability to understand speech is underpinned by a hierarchical auditory system whose successive stages process increasingly complex attributes of the auditory input. To produce categorical speech perception, it ... -
Embodied sonification
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2016)Sonification is the communication of data using sound. This thesis is concerned with meaning-making in sonification. It examines how meaning emerges during sonification listening through the lens of embodied cognitive ... -
Varational Bayes inference in digital receivers
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2014)This thesis is primarily concerned with the trade-off between computational complexity and accuracy in digital receivers. Furthermore, because OFDM modulation is key in 4G systems, there is an interest in better demodulation ... -
Methods of signal processing applied to speech and language for objective assessment of cognitive function in ageing and psychiatry
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2014)Ageing is associated with a change in cognitive function. Impaired cognitive function is the biggest limiting factor to independence in older adults. Cognitive decline does not appear suddenly, but occurs gradually over ... -
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 ... -
Development of neural engineering methods for objective assessment of cognitive processing based on Gait Data : an analysis of a truly nationally representative cohort of older adults
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2015)Knowledge of the brain substrates and neural networks at play during gait are not well understood. However, strong associations between gait and cognitive function have been found in literature. Examining this relationship ... -
Optimised real-time rendering of auditory events in immersive virtual environments
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2014)This project looks at the problem of the capture or synthesis of acoustic events in reverberant spaces and their subsequent plausible reproduction in a virtual version of the original space, otherwise known as a Virtual ... -
Classical and quantum escape rates of particles from potential wells for all values of the dissipation
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2014)The thesis is concerned with the calculation of the escape rate of a Brownian particle out of a deep potential well. A new derivation of the Kramers energy controlled diffusion equation using only the concept of the Langevin ... -
Spaciousness control for sound field recording and reconstruction
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2015)Auditory Spaciousness' is a perceptual characteristic which has been recognized as being an important aesthetic feature of music presentations of various types. Most previous research has been focused on the identification ... -
Flexo-elastic and electro-optical studies of some novel liquid crystalline systems
(Trinity College (Dublin, Ireland). Department of Electronic & Electrical Engineering, 2014)This thesis presents the experimental investigation of the material properties of liquid crystalline systems composed of (i) bent-core molecules, (ii) bimesogens composed of rod-like molecules and (iii) dimesogens composed ... -
Flexoelectric polarization studies in bent-core nematic liquid crystals
(2015)The flexoelectric polarization ( P f ) of four bent-core nematic liquid crystals (LCs) has been measured using the pyroelectric effect. Hybrid aligned nematic cells are fabricated for measuring the pyroelectric response ... -
Effective long-range interlayer interactions and electric-field-induced subphases in ferrielectric liquid crystals
(2016)Microbeam resonant x-ray scattering experiments recently revealed the sequential emergence of electric- field-induced subphases (stable states) with exceptionally large unit cells consisting of 12 and 15 smectic layers. ... -
Anomalous temperature dependence of layer spacing of de Vries liquid crystals: Compensation model
(2016)Smectic liquid crystals that exhibit temperature independent layer thickness offer technological advantages for their use in displays and photonic devices. The dependence of the layer spacing in SmA and SmC phases of de ... -
Spontaneous helix formation in non-chiral bent-core liquid crystals with fast linear electro-optic effect
(2016)Liquid crystals (LCs) represent one of the foundations of modern communication and photonic technologies. Present display technologies are based mainly on nematic LCs, which suffer from limited response time for use in ... -
Dielectric and electro-optic studies of a bimesogenic liquid crystal composed of bent-core and calamitic units
(2014)A bimesogen, BR1, composed of a bent-core and calamitic unit, linked laterally via a flexible spacer is investigated by dielectric and electro-optic techniques. X-ray results show the presence of clusters in the nematic ...
