Browsing by Supervisor "Scott, Jonathan B. "
Now showing items 1-20 of 22
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A calibrated dual-port acoustic Vector Network Analyser
(The University of Waikato, 2022)The Vector Network Analyzer (VNA) is a workhorse in electrical engineering, and has been refined over the last fifty years to offer many advantages. This technology is continually expanding and branching into other fields ... -
Acoustic Vector Network Analyser
(The University of Waikato, 2017)This research aims at increasing the accuracy and precision of characterising acoustic materials by adapting well-known techniques developed for the radio-frequency domain to the acoustic domain. Two novel methods are ... -
Application of Nonlinear Transistor Characteristics
(University of Waikato, 2014)This research presents three works all related by the subject of third-order distortion reduction in nonlinear circuits. Each one is a novel extension to previous work in that branch of electronics literature. All three ... -
Assessment of Standing Herbage Dry Matter Using A Range Imaging Sytem
(University of Waikato, 2013)It has been known for a long time that a device that could quickly and accurately ascertain dry matter content would be very useful to pastoral farmers. Despite many years of various products being developed there is still ... -
Context-aware framework for analysis of horse-race videos
(The University of Waikato, 2018)Today sports analysis systems draw the attention of many commercial entities and are providing many opportunities for computer vision researchers to study and develop automated sports analysis systems. The primary objective ... -
Cross-Needle analog meter to monitor charge time for Lithium-Ion single cell
(The University of Waikato, 2018)The Cross-Needle panel meter is an analog Standing wave ratio meter with a modified panel. It consists of two meters which are mirrored horizontally and 38mm apart. One needle indicates the forward travelling wave on a ... -
Distinguishability of rechargeable battery equivalent circuit models
(The University of Waikato, 2023)The contention made by Berthier et al. - that competing fractional-element equivalent- circuit models of battery cells are indistinguishable in the presence of noise - is revisited in this work. A set of six equivalent ... -
Fractional modelling of rechargeable batteries
(The University of Waikato, 2021)To develop a compact battery model, many authors begin by measuring the impedance of a battery over a frequency range of interest. Most of the models in the literature are either Thevenin-style or Randles’ model consisting ... -
Frequency Response of an Agricultural Fence and the Implications for Data Transmission
(University of Waikato, 2014)The electric fence has been used as a data transmission medium in Gallagher Products for a number of years. This has allowed the energizer to be remotely controlled and, with the current generation, to monitor the performance ... -
How fractional are super-capacitors? Electrochemical Impedance Spectroscopy (EIS) measurements
(The University of Waikato, 2020)Super-capacitors are seeing more frequent use in modern electronic designs. Measuring the impedance of such an energy storage device is a good way to characterise how it will behave in real world situations. Therefore this ... -
iDCC - Hardware, Software and Marketing of a Usable Digital Command Controller
(University of Waikato, 2013)iDCC is the new implement of Digital Command Control (DCC) with a better user interface and a much better user experience compared to the existing DCC controllers on the market. The iDCC project was carried out firstly at ... -
Identification of sustainability’s threshold concept(s) among multi-discipline engineering students
(The University of Waikato, 2023)This mixed-methods study investigated and validated the sustainability threshold concept among multi-disciplinary engineering students, taking into account students’ perceptions and the impact of the sustainability threshold ... -
Implantable electrode structures and their RF effects in MRI machines
(The University of Waikato, 2019)Medical implants incorporating long insulated conductors can generate a serious heating hazard to a patient undergoing a Magnetic Resonance Imaging (MRI) scan. Under the high-power RF field from an MRI machine, the conductors ... -
Impulse TDR and its Application to Characterisation of Antennas
(University of Waikato, 2011)Passive microwave systems are traditionally characterised in the frequency-domain with a vector network analyser (VNA). The measurement of antennas typically takes place in an anechoic chamber where the interference from ... -
Millimetre Wave Power Measurement
(The University of Waikato, 2010)There is currently no traceable power sensor for millimetre wave frequencies above 110 GHz. This thesis investigates a novel approach to remove this limitation by combining the placement of a uniquely designed microchip ... -
Optical measurement of blade edge sharpness
(The University of Waikato, 2018)This research aims to develop a superior way of characterizing knife sharpness. Current successful methods utilize contact destructive testing to develop a measurement protocol for sharpness however; it is in my opinion ... -
Scaling acoustic directional couplers using 3D printing
(University of Waikato, 2015)Acoustic directional couplers permit separation of forward and reverse sound pressure waves. This separation opens the way to traceable, precision acoustic reflection measurements. In order to span the audio spectrum, ... -
Simulation, measurement, and design of multi-electrode spinal cord stimulation Leads with a focus on MRI safeness and stimuli induced artefacts
(The University of Waikato, 2019)The electromagnetic (EM) and thermodynamic (TD) models for a Spinal Cord Stimulator (SCS) presented in this work, permit on one hand to analyse the impact of electrical stimuli patterns on artefacts and on the other hand ... -
Surface Roughening of Platinum Wire: An Electrochemical and Mechanical Approach
(University of Waikato, 2017)In order to make implanted electrodes MRI safe several methods have been explored. One of those methods involves increasing AC resistance by roughening the surface of the implanted platinum wires. This thesis explores an ... -
The Art of Coffee Roasting: Investigations into Sensor Development for the Application of Controlling Coffee Roasting
(The University of Waikato, 2018)In this thesis, I investigate novel methods of sensing change in roasting coffee. Coffee roasting is a vital step in coffee’s supply chain. It is the process that takes green coffee and transforms it via a series of many ...
