University of Waterloo: Recent submissions
Now showing items 1-20 of 10885
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Impacts of Transit-Oriented Development (TOD) on the Travel Behavior of its Residents in Shenzhen, China
(University of Waterloo, 2017-10-18)Rapid urbanization in cities across the world has generated a number of issues including urban sprawl, segregation of land uses, traffic congestion and negative environmental impacts. Transit-oriented development (TOD) has ... -
Nonlinear Preconditioning Methods for Optimization and Parallel-In-Time Methods for 1D Scalar Hyperbolic Partial Differential Equations
(University of Waterloo, 2017-10-18)This thesis consists of two main parts, part one addressing problems from nonlinear optimization and part two based on solving systems of time dependent differential equations, with both parts describing strategies for ... -
Evaluation of a Series-Configuration Solar-Assisted Heat Pump with Performance-Predictive Controls
(University of Waterloo, 2017-10-18)This thesis evaluates a configuration of a 3-mode solar-assisted heat pump (SAHP), which features a heat exchanger and heat pump which may operate independently or in series to provide heat for a domestic hot water system. ... -
Halfway to Halfspace Testing
(University of Waterloo, 2017-10-18)In this thesis I study the problem of testing halfspaces under arbitrary probability distributions, using only random samples. A halfspace, or linear threshold function, is a boolean function f : Rⁿ → {±1} defined as the ... -
Systems, materials, and methodologies for multi-material hybrid additive manufacturing functionally graded structures
(University of Waterloo, 2017-10-18)Over the last three decades, additive manufacturing (AM), which is based on fashioning 3D objects through a layer-by-layer construction, has greatly expanded. The progress in this field is due to the capability of fabricating ... -
An Investigation of Manganese Macro segregation in Cast Dual Phase Steels using Micro X-ray Fluorescence Spectroscopy
(University of Waterloo, 2017-10-18)Advanced High Strength Steels with a high manganese content offer an exceptional balance of strength and ductility. However, the occurrence of segregation in these steels, particularly at the centerline, leads to quality ... -
Primary care providers' observations on diabetes management for young adults in Ontario: Barriers and enablers to care and patient-provider communication
(University of Waterloo, 2017-10-18)Background: Type 2 diabetes mellitus (T2DM) is a global epidemic that is only projected to impact more people in the coming years. In Canada, there has been a steady increase of people living with T2DM, including an increase ... -
Real time resistance monitoring during sintering of silver paste
(Elsevier, 2018-01-15)Real time resistance monitoring technology is used to study the silver sintering process. Signals of joint resistance show events such as resistance increase to >10 GΩ, abrupt resistance drop from >10 GΩ to <1 kΩ, ... -
A facile and fully automated on-fiber derivatization protocol for direct analysis of short-chain aliphatic amines using a matrix compatible solid-phase microextraction coating
(Elsevier, 2017-07-29)Solid-phase microextraction (SPME) analysis of short-chain aliphatic amines (C-3-C-6) in aqueous solutions was investigated using pentafluorobenzaldehyde (PFBAY) as on-fiber derivatization reagent. A standard gas generating ... -
Major liver resection, systemic fibrinolytic activity, and the impact of tranexamic acid
(Elsevier, 2016-12-01)Background: Hyperfibrinolysis may occur due to systemic inflammation or hepatic injury that occurs during liver resection. Tranexamic acid (TXA) is an antifibrinolytic agent that decreases bleeding in various settings, but ... -
Coupling solid phase microextraction to complementary separation platforms for metabotyping of E. coli metabolome in response to natural antibacterial agents
(Springer, 2016-11-02)Introduction Essential oils are known to possess antimicrobial activity; thus, their use has played an important role over the years in medicine and for food preservation purposes. Objective The effect of clove oil and its ... -
A critical review of solid phase microextraction for analysis of water samples
(Elsevier, 2016-12-01)The review summarizes applications of solid phase microextraction (SPME) for water sample analysis. Official methods and standards of SPME in water research and inter-laboratory validation are discussed. A comparison of ... -
Insights into the Effect of the PDMS-Layer on the Kinetics and Thermodynamics of Analyte Sorption onto the Matrix-Compatible Solid Phase Microextraction Coating
(American Chemical Society, 2017-03-07)The currently presented research investigated the performance of matrix compatible PDMS-overcoated fibers (PDMS-DVB/PDMS) as compared to unmodified PDMS/ DVB coatings using aqueous samples and employing a wide range of ... -
Inter-laboratory validation of a thin film microextraction technique for determination of pesticides in surface water samples
(Elsevier, 2017-04-29)The primary goal of the present study is the inter-laboratory evaluation of a thin film microextraction (TFME) technique to be used as an alternative approach to liquid-liquid extraction (LLE). Polydimethylsiloxane/ ... -
Calibrant Free Sampling and Enrichment with Solid-Phase Microextraction: Computational Simulation and Experimental Verification
(American Chemical Society, 2017-04-05)Despite the benefits of diffusion-based calibrant-free sampling based on solid-phase microextraction (SPME), this quantification approach is often underestimated due to an inadequate understanding of how extraction parameters ... -
New Generation of Solid-Phase Microextraction Coatings for Complementary Separation Approaches: A Step toward Comprehensive Metabolomics and Multiresidue Analyses in Complex Matrices
(American Chemical Society, 2017-04-04)In this work, a new generation of solid-phase microextraction (SPME) coatings based on polytetrafluoro-ethylene amorphous fluoroplastics (PTFE AF 2400) as a particle binder is presented. The developed coating was tested ... -
Methodical evaluation and improvement of matrix compatible PDMS-overcoated coating for direct immersion solid phase microextraction gas chromatography (DI-SPME-GC)-based applications
(Elsevier, 2017-05-12)The main quest for the implementation of direct SPME to complex matrices has been the development of matrix compatible coatings that provide sufficient sensitivity towards the target analytes. In this context, we present ... -
Fast Quantitation of Target Analytes in Small Volumes of Complex Samples by Matrix-Compatible Solid-Phase Microextraction Devices
(Wiley, 2017-06-20)Herein we report the development of solid-phase microextraction (SPME) devices designed to perform fast extraction/enrichment of target analytes present in small volumes of complex matrices (i.e. V <= 10 mu L). Micro-sampling ... -
Solid Phase Microextraction On-Fiber Derivatization Using a Stable, Portable, and Reusable Pentafluorophenyl Hydrazine Standard Gas Generating Vial
(American Chemical Society, 2017-07-05)Solid phase microextraction (SPME) on-fiber derivatization methods have facilitated the achievement of lower detection limits and targeted analysis of various substances that exhibit poor chromatographic behavior, thermal ... -
A new and efficient Solid Phase Microextraction approach for analysis of high fat content food samples using a matrix-compatible coating
(Elsevier, 2017-05-15)The current work presents the optimization of a protocol enabling direct extraction of avocado samples by a new Solid Phase Microextraction matrix compatible coating. In order to further extend the coating life time, ...