Browsing University of Waterloo by Title
Now showing items 14179-14198 of 18907
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q-deformed LQG in three dimensional space-time
(University of Waterloo, 2022-08-23)Loop quantum gravity (LQG) is a canonical, background-independent and non-perturbative approach to quantum gravity. This thesis is devoted to studying three-dimensional (3D) quantum gravity with a non-vanishing cosmological ... -
The Qinghai-Tibet Railway and Tibet Tourism: Travelers’ Perspectives
(University of Waterloo, 2007-09-22)With the distinguished natural and cultural tourism resources, Tibet is undoubtedly a desirable travel destination both domestically and internationally. With the newly opened Qinghai-Tibet railway to Lhasa in July 2006, ... -
QoS Routing in Wireless Mesh Networks
(University of Waterloo, 2008-01-28)Wireless Mesh Networking is envisioned as an economically viable paradigm and a promising technology in providing wireless broadband services. The wireless mesh backbone consists of fixed mesh routers that interconnect ... -
QoS Scheduling in IEEE 802.16 Broadband Wireless Access Networks
(University of Waterloo, 2008-05-14)With the exploding increase of mobile users and the release of new wireless applications, the high bandwidth requirement has been taking as a main concern for the design and development of the wireless techniques. There ... -
QoS Support for Voice Packet Transmission over Cognitive Radio Networks
(University of Waterloo, 2010-07-27)Cognitive Radio Networks (CRNs) provide a solution for the spectrum scarcity problem facing the wireless communications community. However, due to the infancy of CRNs, further research is needed before we can truly benefit ... -
QoS-aware Mobile Web Services Discovery Using Utility Functions
(University of Waterloo, 2008-05-20)Existing QoS-aware Web Services discovery architectures tend to focus solely on fulfilling the requirements of either the client or the provider. However, the interests of the provider and client are not equivalent. The ... -
Quadratic Hedging with Margin Requirements and Portfolio Constraints
(University of Waterloo, 2010-04-28)We consider a mean-variance portfolio optimization problem, namely, a problem of minimizing the variance of the final wealth that results from trading over a fixed finite horizon in a continuous-time complete market in the ... -
Quadratic Loss Minimization in a Regime Switching Model with Control and State Constraints
(University of Waterloo, 2015-04-09)In this thesis, we address a convex stochastic optimal control problem in mathematical finance, with the goal of minimizing a general quadratic loss function of the wealth at close of trade. We study this problem in the ... -
A quadratic programming approach to find faces in robust nonnegative matrix factorization
(University of Waterloo, 2017-08-29)Nonnegative matrix factorization (NMF) is a popular dimensionality reduction technique because it is easily interpretable and can discern useful features. For a given matrix M (dimension n x m) whose entries are nonnegative ... -
Quadratically Dense Matroids
(University of Waterloo, 2020-07-08)This thesis is concerned with finding the maximum density of rank-$n$ matroids in a minor-closed class. The extremal function of a non-empty minor-closed class $\mathcal M$ of matroids which excludes a rank-2 uniform ... -
Quadrotor Position Estimation using Low Quality Images
(University of Waterloo, 2011-09-28)The use of unmanned systems is becoming widespread in commercial and military sectors. The ability of these systems to take on dull, dirty, and dangerous tasks which were formerly done by humans is encouraging their rapid ... -
Quadrupole Electric Field for Erasing the Fine Structure Splitting of a Nanowire Quantum Dot Entangled Photon Source
(University of Waterloo, 2020-10-19)Entanglement is an essential tool in quantum information processing (QIP), for example, to achieve a secure quantum communication network and quantum computing. Semiconductor quantum dots can generate on-demand entangled ... -
A qualitative examination of the impact of social restrictions during COVID-19 pandemic on social relations and social interactions of adolescents aged 12-18 years in Ontario, Canada
(University of Waterloo, 2022-10-24)Background: The novel coronavirus outbreak (COVID-19) was declared a global pandemic by the World Health Organization (WHO) in March 2020 (WHO, 2020). The government of Ontario declared a stay-at-home order where schools ... -
Qualitative Properties of Hybrid Singular Systems
(University of Waterloo, 2019-01-15)A singular system model is mathematically formulated as a set of coupled differential and algebraic equations. Singular systems, also referred to as descriptor or differential algebraic systems, have extensive applications ... -
Qualitative Properties of Stochastic Hybrid Systems and Applications
(University of Waterloo, 2011-09-02)Hybrid systems with or without stochastic noise and with or without time delay are addressed and the qualitative properties of these systems are investigated. The main contribution of this thesis is distributed in three ... -
Qualitative Studies of Nonlinear Hybrid Systems
(University of Waterloo, 2010-12-14)A hybrid system is a dynamical system that exhibits both continuous and discrete dynamic behavior. Hybrid systems arise in a wide variety of important applications in diverse areas, ranging from biology to computer science ... -
A Qualitative Study of Task and Work-Social Networks
(University of Waterloo, 2013-01-25)Despite the well-recognized importance of interpersonal relationships within the work environment, there is no comprehensive approach or set of studies that provide a complete picture. As a step towards providing a complete ... -
Qualitative theory of impulsive delay differential equations
(University of Waterloo, 2000) -
Qualitative Theory of Switched Integro-differential Equations with Applications
(University of Waterloo, 2014-08-25)Switched systems, which are a type of hybrid system, evolve according to a mixture of continuous/discrete dynamics and experience abrupt changes based on a switching rule. Many real-world phenomena found in branches of ... -
Quality Assessment of Composite Materials using Ultrasonic Non-Destructive Testing Methods
(University of Waterloo, 2020-09-17)Non-destructive ultrasonic evaluation (NDE) is commonly used for assessment of civil infrastructure and characterization of construction materials. It is an efficient technique that could save millions of dollars with ...