Theses

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  • 3D modelling of industrial piping systems using digital photogrammetry and laser scanning
    3D modelling of industrial piping systems using digital photogrammetry and laser scanning
    Industrial metrology is one of the fastest growing areas in advanced technologies, such as electronics and optics, computation speed, and it has been increased in recent years. There are several tools used in industrial metrology, such as total stations, digital photogrammetry, and laser scanning. Close range digital photogrammetry has been implemented for an industrial piping system in terms of installation, inspection, and replacement. Laser scanning is also used for industrial measurements to generate 3D coordinates points. In order to develop a 3D modelling strategy, this thesis focuses on the development, selection and design of photogrammetric procedures and project specific targets. This thesis also explores image-acquiring sensors such as digital cameras and laser scanners in terms of their capabilities and advantages. Based on experimental setup accuracy, measurements of piping systems are compared for applications of two different sensors.Effects of different surface materials are examined in laser scanning applications and several different types of materials are used for acquiring point clouds data. Measurement of pipes' diameters and residual analyses are conducted with different surface materials, which are used for industrial pipes. Significant improvement in laser scanning data acquisition is examined in terms of data quality both quantitatively and qualitatively during the residual analyses.
    3D printed phantom to mimic dynamic softening of cervix during pre-labour
    3D printed phantom to mimic dynamic softening of cervix during pre-labour
    It is thought that through the development of more realistic training models for midwives and obstetricians it may be possible to reduce the overuse of labour induction. To this end we demonstrate a method for creating pneumatically-controlled phantom cervixes using thermoplastic elastomer, filled with a granular material. The maximum spring constant of the phantom cervix was measured to be 10.5 N/m at -20 kPa deflated air (vacuum) and the minimum spring constant measured was 5.3 N/m at 20 kPa inflated air. The true stress measured on these elastomeric phantom cervixes indicated a maximum stress of 133 kPa and a minimum stress of 94 kPa at 0.15 strain. Discrimination and threshold tests demonstrated that people can distinguish between the hard and soft states of the phantom. Future work will focus on increasing the softness of these devices.
    60 seasons : a conversation around the future of food
    60 seasons : a conversation around the future of food
    The current state of food production in the Western world is leading to the devastation of our land, soil, and air. industrial farms are contributing not just to poor human health, but to the ever increasing depletion of our natural esources, a reduction in the biodiversity of plants and animals and in the sustainability of the planet. 60 Seasons – A Conversation around the Future of Food aims to stimulate the dialogue around healthy and sustainable means of food production by depicting the efforts of two small groups within Northumberland County, Ontario. Their aim is to bring sustainable farming methods to their community, while expanding the discourse around environmentally sound food production and providing healthy food choices to those in need.
    A 1.2 V, 8-bit, 100 MHz pipelined analog-to-digital converter
    A 1.2 V, 8-bit, 100 MHz pipelined analog-to-digital converter
    A 1.2 V, 8 bit, 100 MSample/Sec Pipeline Analog-to-Digital Converter is designed in 0.18-μm standard CMOS technology. An emphasis was placed on observing the low voltage and low power design. The architecture of this ADC is 1 bit/stage pipelined configuration.With above specifications the designed ADC can be applicable for DVI flat-panel display; Giga bit Ethernet on copper, RGB to LCD converter and cable modem. This designed ADC can achieve SNDR 56dB in 100 MHz sampling frequency with 8 bit resolution. Total power dissipation is 40.6mW and INL is around 1 LSB and the maximum swing of the input is 1 Volt peak to peak which is almost rail-to-rail situation. The core area of the ADC excluding pads is around 0.25mm 2 .
    A 1.8V 1.1-GHZ Novel 8 X 8-Bit Digital Multiplier
    A 1.8V 1.1-GHZ Novel 8 X 8-Bit Digital Multiplier
    This thesis presents the design of an 8x8-bit novel multiplier, which can provide a better performance that its counterparts in the sense that it has a fraction of the silicon area, delay and power consumption of the common architectures such as the conventional linear array multipliers. At the system-level high performance is obtained by implementing a pair-wise multiplication algorithm. Also, parallel addition algorithm is used to add up partial products. Combining these two algorithms results in an efficient cell-based circuit realization. In the circuit-level, pseudo-NMOS full adder cell is chosen amongst the several existing full adder cells due to its superior speed and power performance. The performance of this design has been evaluated by comparing it to those of the recently reported multipliers. The results of the comparison, both in theory and simulation, prove the superiority of the proposed multiplier.
    A 10 Gbps 4-PAM CMOS serial link transmitter with pre-emphasis
    A 10 Gbps 4-PAM CMOS serial link transmitter with pre-emphasis
    This thesis presents the design of 10 Gbps 4-PAM CMOS serial link transmitters. A new area-power efficient fully differential CMOS current-mode serial link transmitter with a proposed 2/4-PAM signaling configuration and a new pre-emphasis scheme is presented. The pre-emphasis inthe analog domain and the use of de-emphasis approach decres pre-emphasis power and chip area. The high-speed operation of the transmitter is achieved from the small voltage swing of critical nodes of the transmitter, shunt peaking with active inductors, multiplexing-at-input approach, the distributed multiplexing nodes, and the low characteristic impedance of the channels. The fully differential and bidirectional current-mode signaling minimizes the noise injected to the power and ground rails and the electromagnetic interference exerted from the channels to neighboring devices. A PLL containing a proposed five-stage VCO is implemented to generate multi-phase on -chip clocks. The proposed VCO minimized the phase noise by keeping a constant rising and falling time. Simulation results demonstrate that the current received at the far end of a 10 cm FR-4 microstriop has a 4-PAM current eye width of 185 ps and eye hight of 1.21 mA. It consumes 57.6 mW power with differnetial delay block, or 19.2 mW power with inverter buffer chain. The total transistor area of the transmitter is 26.845 ....excluding the delay block.
    A 100 MHz - 1 GHz on-chip-programmable phase-locked-loop
    A 100 MHz - 1 GHz on-chip-programmable phase-locked-loop
    A programmable wide-range PLL has been designed that can provide 100-MHz to 1-GHz rail-to-rail digital clock signal from a 50-MHz reference clock. The architecture is appropriate for low-power design and is also power-efficient. The system is robust against temperature changes so that the stability of the system is guaranteed. Because of the differential configuration of the sub-blocks and using a voltage-controlled oscillator with a 1Ow. gain and a linear transfer function the system has an acceptable noise rejection.
    A Basic Income For All? Understanding the Basic Income Concept From the Perspectives of Community-Based Advocates
    A Basic Income For All? Understanding the Basic Income Concept From the Perspectives of Community-Based Advocates
    Basic income is a policy concept that has garnered considerable research attention over the past decade. However, very few studies have explored the concept from the perspectives of frontline service providers and anti-poverty activists. Grounded in structural social work and intersectionality theories, this qualitative study centres the insights of six individuals working and organizing in various community roles, including frontline social workers and grassroots anti-poverty activists. The findings from this study, gathered through a focus group, suggest that community responders to poverty are deeply unhappy with the current welfare state, possess mixed feelings about the possibilities of a basic income strategy, and are highly skeptical about the ethical implications and political motivations behind the Ontario government’s basic income pilot study. It is hoped that the findings from this research will complicate and deepen perspectives on a basic income while simultaneously contributing to the momentum behind this emerging policy intervention.
    A Block Cipher Design Using Recurrent Neural Networks
    A Block Cipher Design Using Recurrent Neural Networks
    As security becomes a necessary component for business applications in many areas, research of new cryptography technology is desirable, especially the highly secure and efficient data encryption technique. A new block cipher designed [sic] based on recurrent neural networks is proposed for the first time in the project. Recurrent neural networks have dynamics characteristics and can express functions of time. By introducing recurrent neural networks to cryptography, the proposed block cipher releases the constraint on the the length of secret key. The inherited high by parallel processing capability of neural networks can also improve the encryption performance greatly. The recurrent neural networks make the block cipher strong to resist different cryptanalysis attacks and to provide data integrity and authentication service at the same time. The design of the proposed block cipher is presented and analysed in detail. Simulation results provide illustrations. The proposed block cipher is flexible to be implemented either in software or in hardware for efficient data encryption purpose.
    A Blueprint for Recovery
    A Blueprint for Recovery
    Built environments inevitably serve as grand mnemonic elements that contain and transmit layers of culture and history. Failing to acknowledge the significance of difficult memories in the identity and culture of cities induces the gradual erosion of history as well as preventing movement toward a better future. In order to preserve the latent value in the identity of the city, architectural strategies should be implemented by which forgotten memories and hidden traces could be recalled to conscious narration. Recalling a story from the past, intentionally or unconsciously forgotten as a form of amnesia, can help re-contextualize memory images that awaken within us a new avenue to the future. This thesis intends to refine the dynamics of remembrance, illuminating the power of architecture as a medium for providing frames of perception and horizons of understanding of past experiences.
    A CAVE based 3d immersive interactive city with gesture interface
    A CAVE based 3d immersive interactive city with gesture interface
    This thesis presents a system that visualizes 3D city data and supports gesture interactions in a fully immersive Cave Automatic Virtual Environment (CAVE). To facilitate more natural interactions in this immersive virtual city, novel techniques are proposed for operations such as object selection, object manipulation, navigation and menu control. These operations form a basis of interactions for most Virtual Reality (VR) applications. The proposed techniques are predominantly controlled using gestures. We also propose the use of pattern recognition methods, specifically a Hidden Markov Model, to support real time dynamic gesture recognition and demonstrate its use for menu control in VR applications. Qualitative and quantitative user studies are conducted to evaluate the proposed techniques. The results of the user studies demonstrate that the interaction techniques for object selection and manipulation are measurably better than traditional techniques. The results also show that the proposed gesture based navigation and menu control techniques are preferred by experienced users. These findings can guide future user interface design in immersive environments.
    A CMOS voltage-mode image sensing system
    A CMOS voltage-mode image sensing system
    A CMOS image sensor consists of a light sensing region that converts photonic energy to an electrical signal and a peripheral circuitry that performs signal conditioning and post-processing. This project investgates the principle and design of CMOS active image sensors. The basic concepts and principle of CMOS image sensors are investigated. The advantages of CMOS image sensors over charge-coupled device (CCD) image sensors are presented. Both passive pixel sensors (PPS) and acive pixel sensors (APS) are examined in detail. The noise of CMOS image sensors is investigated and correlated double sampling (CDS) techniques are examined. The design of APS arrays, CDS circuits and 8-bit analog to-digital converters in TSMC-0.18μm 1.8V CMOS technology is presented. The simulation results and layout of the designed CMOS image sensor are presented.