Browsing Theses by Title
Now showing items 8924-8943 of 15591
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Mechanical Degradation of Membrane Electrode Assemblies in Proton Exchange Membrane Fuel Cells
(University of Waterloo, 2017-06-08)The Polymer Electrolyte Membrane (PEM) fuel cell is an ideal emerging alternative power source for transportation; however, before PEM fuel cells’ widespread use, a number of technical challenges need to be overcome, ... -
The Mechanical Design and Analysis of an Active Prosthetic Knee
(University of Waterloo, 2008-05-16)In a world of war and turmoil in developing nations, land mines are becoming a concern, as millions of them are scattered in countries all over the world. Moreover, land mine prevention programs cannot clear land mine ... -
Mechanical response of the porcine cervical spine to acute and repetitive anterior-posterior shear
(University of Waterloo, 2011-01-13)Approximately 80% of the population will experience low-back pain within their lifetime. Significant research efforts have focused on compressive loading as an injury mechanism that could lead to low-back pain and injury. ... -
Mechanically Tunable RF/Microwave Filters: from a MEMS Perspective
(University of Waterloo, 2007-06-26)RF/microwave tunable filters are widely employed in radar systems, measurement instruments, and communication systems. By using tunable filters, the frequency bandwidth is utilized effectively and the system cost and ... -
Mechanics and Control of Human Balance
(University of Waterloo, 2011-04-18)A predictive, forward-dynamic model and computer simulation of human gait has important medical and research applications. Most human simulation work has focused on inverse dynamics studies to quantify bone on bone forces ... -
Mechanism Design For Covering Problems
(University of Waterloo, 2014-01-24)Algorithmic mechanism design deals with efficiently-computable algorithmic constructions in the presence of strategic players who hold the inputs to the problem and may misreport their input if doing so benefits them. ... -
Mechanisms controlling the recycling of nutrient silicon in freshwater sediments: An experimental study of the interactions between silicon, iron and phosphorus
(University of Waterloo, 2020-12-23)Dissolved silicon (DSi) is an essential nutrient for numerous terrestrial and aquatic organisms. In freshwater systems, including streams, rivers and lakes, an important class of siliceous algae are diatoms. Human activities, ... -
Mechanisms Driving Service Duration: A Large-Scale Empirical Analysis
(University of Waterloo, 2021-09-28)Using large-scale MRI services data, a multi-type multi-priority scheduling system, we measure service duration and show that a number of covariates, including the shift during which the procedure is performed, patients' ... -
Mechanisms for Dynamic Setting with Restricted Allocations
(University of Waterloo, 2011-10-27)Dynamic mechanism design is an important area of multiagent systems, and commonly used in resource allocation where the resources are time related or the agents exist dynamically. We focus on a multiagent model within which ... -
Mechanisms of over-active endothelium-derived contracting factor signaling causing common carotid artery endothelial vasomotor dysfunction in hypertension and aging
(University of Waterloo, 2011-03-09)Background and Purpose: The endothelium is a single-cell layer positioned at the blood-vascular wall interface, where in response to blood-borne signals and hemodynamic forces, endothelial cells act as central regulators ... -
Mechanisms of the Aging-Related Positivity Effect in Memory and Attention
(University of Waterloo, 2012-05-16)According to the Socioemotional Selectivity Theory (SST), the normal aging process is associated with a greater emphasis on self-regulation of emotional states, and this fosters a bias in cognitive processing for information ... -
A mechanistic approach to assessment of the geochemical evolution of low sulfide mine-waste rock
(University of Waterloo, 2019-01-04)The potential for mine wastes to generate elevated concentrations of solutes including metals, sulfate, and reduced pH exists wherever mine-waste rock is stockpiled at the Earth’s surface representing one of the world’s ... -
A Mechanistic Derivation of The Monod Equation For Biofilm in Porous Media
(University of Waterloo, 2021-12-20)A mechanistic derivation of the Monod bioreaction equation is presented. The numerical model developed for this derivation involves four processes. 1)On the pore scale, substrate diffuses from the bulk aqueous phase crossing ... -
Mechanistic Framework for Risk Assessment of Cast Iron Water Main Fractures due to Moisture-Induced Soil Expansion
(University of Waterloo, 2021-07-09)North American water distribution networks are at significant risk of failure due to aging cast iron pipes. For instance, of the 650,000 kilometers of cast-iron pipes in active service in the United States and Canada, ... -
A mechanistic model of motion processing in the early visual system
(University of Waterloo, 2012-12-05)A prerequisite for the perception of motion in primates is the transformation of varying intensities of light on the retina into an estimation of position, direction and speed of coherent objects. The neuro-computational ... -
Mechanistic Role of ARNT/HIF-1β in the Regulation of Glucose-Stimulated Insulin Secretion
(University of Waterloo, 2014-04-29)Loss of glucose-stimulated insulin secretion (GSIS) from the pancreatic beta-cells is one of the earliest detectable defects in the pathogenesis of type 2 diabetes. However, despite its relevance, the mechanisms that govern ... -
Mechanistic Studies of Interface Formation Between AA3003 and AA4045 Alloys During Fusion™ Casting
(University of Waterloo, 2015-04-30)Fusion™ casting is a unique Direct Chill (DC) continuous casting process whereby two different alloys can be cast simultaneously, producing a laminated aluminum ingot. Empirically derived operating ranges exist for Fusion™ ... -
Mechano-chemical synthesis of amorphous manganese borohydride, the effect of catalytic additives on its hydrogen generation properties, and crystallization during solvent extraction
(University of Waterloo, 2016-10-13)Abstract This thesis forms one of the final parts of an extended study on the hydrogen storage and generation properties of metal borohydrides. Manganese borohydride, Mn(BH4)2, which is expected to be formed by the ... -
Mechatronic Design, Dynamics, Controls, and Metrology of a Long-Stroke Linear Nano-Positioner
(University of Waterloo, 2016-12-01)Precision motion systems find a broad range of application in various fields such as micro/nano machining tools, lithography scanners, testing and metrology machines, micro-assembly, biotechnology, optics manufacturing, ... -
Media multitasking and performance on attentionally demanding tasks
(University of Waterloo, 2017-07-31)This dissertation examined the behaviour of media multitasking, with a specific focus on three broad goals. The first goal, explored in Chapter 2, was to examine whether individual differences in the propensity to media ...