Browsing Department of Mechanical and Materials Engineering Graduate Theses by Title
Now showing items 198-217 of 345
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Machine Vision Based Inspection: Case Studies on 2D Illumination Techniques and 3D Depth Sensors
(2012-03-01)This paper investigates two distinct, but related, topics in machine vision. The first is the effect of lighting on the performance of a 2D vision-based inspection system. The lighting component of machine vision has often ... -
Manufacture of vertical walls with asymmetric incremental sheet forming
Single point incremental forming (SPIF) is a dieless sheet metal forming technique that can manufacture customised sheet metal components in a cost-effective manner. However, the process is still in the developmental phase ... -
Matuto, Magbasa, Maglaro: Learning to Read Braille Through Play
In 2016, Digital Learning for Development and All Children Reading released a “Grand Challenge for Development” urging researchers to explore the barriers that children with sensory disabilities in the Philippines face ... -
Measurement and Modelling of Vibration Characteristics of a Mining Skip During Unloading
(2014-12-03)Arc gate skips can carry larger payloads compared to other designs due to the superior safety of the arc gate design, however these skips experience large amplitude vertical oscillations during unloading. Data were collected ... -
Measurement of Pubic Symphysis Width in Different Birthing Positions Using Ultrasound
Studies have shown that certain postures, such as squatting and standing, may facilitate labour and birth and may be used by some practitioners. However, a rigorous biomechanical understanding of how different positions ... -
Measuring Cognitive Load in a Clinical Setting: Medical Learning and Practice
Cognitive load theory is of particular relevance to the learning and practice of medicine, where task demands require a complex interplay of working memory, emotion, and stress. To better understand the role of cognitive ... -
Mechanical Analysis of Osseointegrated Transfemoral Implant Systems
(2010-04-06)Osseointegrated transfemoral implants have been introduced as an alternative to conventional, socket-based prostheses for above knee amputees. This method is showing great promise; however, the frequency of device failure ... -
Mechanical Characterization of Zirconium Hydrides with High Energy X-Ray Diffraction
(2009-09-28)Zirconium and its alloys are of technical importance, finding application as a structural material in the nuclear industry. Engineering components fabricated from zirconium slowly pick-up hydrogen as a result of in-reactor ... -
Mechanical Properties of Dynamic Energy Return Prosthetic Feet
(2008-04-16)The long-term goal of this study is to improve the ability of designers and prosthetists to match the mechanical characteristics of prosthetic feet to patient specific parameters, including, needs, abilities and biomechanical ... -
Mechanical Testing and Characterization of Proton Irradiated 99.4% NI Using the Reactor Materials Testing Laboratory
The Queen’s Reactor Material Testing Laboratory uses proton irradiation to simulate the damage induced in a material from neutrons, within a nuclear reactor environment. Inconel X-750 is a 70wt% Ni superalloy, used for the ... -
Methods for Improving Ability to Investigate the Effectiveness of Non-Invasive Treatment Strategies for Medial Knee OA
Osteoarthritis (OA) is the most common form of arthritis, occurring frequently in the medial compartment of the knee. As the onset and progression of medial knee OA has been associated with abnormal and excessive loading ... -
Micro-Computed Tomography Reconstruction and Analysis of the Porous Transport Layer in Polymer Electrolyte Membrane Fuel Cells
(2012-02-02)A procedure is presented to analyze select geometric and effective properties of the porous transport layer (PTL) of the polymer electrolyte membrane fuel cell (PEMFC) in com- pressed and uncompressed states using ... -
MICROSTRUCTURAL CHARACTERIZATION AND MECHANICAL PROPERTIES OF EXCEL ALLOY PRESSURE TUBE MATERIAL
(2012-08-28)Microstructural characterization and mechanical properties of Excel (Zr-3.5%Sn-0.8%Mo-0.8%Nb), a dual phase αZr-hcp and βZr-bcc pressure tube material, is discussed in the current study which is presented in manuscript ... -
Microstructural effects on the stability of retained austenite in transformation induced plasticity steels
(2008-01-03)Transformation Induced Plasticity (TRIP) steels have both high strength and high ductility. Retained austenite in the microstructure, upon straining, transforms to martensite and this absorbs energy and improves the work ... -
Microstructural Evaluation and Thermal Creep Behavior of Zr-Excel
(2015-12-01)Dual phase (α-β) Zr-Excel Pressure Tube (PT) material has been heat treated in the (α+β) or β-phase regime to generate variable microstructures. These heat-treated microstructures revealed significant modification in the ... -
Microstructural Evolution and Hardening of Zr-2.5Nb-0.5Cu Spacer Material under Irradiation
Zr-2.5Nb-0.5Cu alloy is considered as a potential replacement of the current Inconel X-750 alloy for future spacer installations in CANDU® reactors. They are designed to be placed in the annular space between pressure and ... -
MICROSTRUCTURAL EVOLUTION IN ZR AND ZR ALLOY EXCEL UNDER ION IRRADIATION
(2014-01-03)Zirconium and its alloys have been used extensively in both light and heavy water reactors where neutron irradiation is known to cause microstructural evolution, leading to degradation of mechanical properties and dimensional ... -
A Microstructural Model for a Proton Exchange Membrane Fuel Cell Catalyst Layer
(2012-09-08)This thesis presents a framework for a microstructural model of a catalyst layer in a proton exchange membrane (PEM) fuel cell. In this study, a stochastic model that uses individual carbon, platinum and ionomer particles ... -
Microstructure-Mechanical Properties Relations in Pressureless Sintered SiC-TiB2 Composite Ceramics
(2009-10-07)Abstract Densification and mechanical properties (hardness, fracture toughness and flexural strength) of the SiC-TiB2 composite were studied. Pressureless sintering experiments were carried out on samples containing 0 ... -
THE MICROSTRUCTURES OF ZR-EXCEL ALLOY: EFFECTS OF HEAVY ION IRRADIATION, PLASTIC DEFORMATION, THERMAL TREATMENT AND IN-SITU HEATING
(2016-09-26)Zr-Excel alloy (Zr-3.5Sn-0.8Nb-0.8Mo) is a dual phase (α + β) alloy in the as-received pressure tube condition. It has been proposed to be the pressure tube candidate material for the Generation-IV CANDU-Supercritical Water ...