Browsing Physics and Astronomy by Issue Date
Now showing items 21-40 of 767
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Ordering mechanisms in triblock copolymers
(American Physical Society, 2004)The ordering mechanisms for an ABC triblock copolymer system are studied using self-consistent field theory. We find a two-phase mechanism, similar to what has been suggested experimentally two-step mecha- nism. Analysis ... -
Self-Assembly of Amphiphilic Nanoparticle-Coil “Tadpole” Macromolecules
(American Chemical Society, 2004)There has been considerable fascination with the self-assembling behavior of amphiphilic chainlike molecules that range from short-chain surfactants to high molecular weight block copolymers. The self-assembly of simple ... -
Elastic moduli of multiblock copolymers in the lamellar phase
(AIP Publishing, 2004-02-22)We study the linear elastic response of multiblock copolymer melts in the lamellar phase, where the molecules are composed of tethered symmetric AB diblock copolymers. We use a self-consistent field theory method, and ... -
Spectroscopy of selected metal-containing diatomic molecules
(University of Waterloo, 2005)Fourier transform infrared emission spectra of MnH and MnD were observed in the ground <em>X</em><sup>7</sup>σ<sup>+</sup> electronic state. The vibration-rotation bands from <em>v</em> = 1 to 0 to <em>v</em> = ... -
Monte Carlo Study of the Magnetic Flux Lattice Fluctuations in High-<em>T<sub>c</sub></em> Superconductors
(University of Waterloo, 2005)By allowing to measure the magnetic field distribution inside a material, muon spin rotation experiments have the potential to provide valuable information about microscopic properties of high-temperature superconductors. ... -
Nematic ordering of wormlike polymers
(University of Waterloo, 2005)In this thesis, based on the Onsager excluded volume interaction model, two nematic ordering problems of wormlike (semiflexible) polymer are studied: one is to investigate the isotropic-nematic interface of polymers for ... -
Fast Stochastic Global Optimization Methods and Their Applications to Cluster Crystallization and Protein Folding
(University of Waterloo, 2005)Two global optimization methods are proposed in this thesis. They are the multicanonical basin hopping (MUBH) method and the basin paving (BP) method. <br /><br /> The MUBH method combines the basin hopping (BH) ... -
Topological methods in quantum gravity
(University of Waterloo, 2005)The main technical problem with background independent approaches to quantum gravity is inapplicability of standard quantum field theory methods. New methods are needed which would be adapted to the basic principles ... -
Minimal model for the secondary structures and conformational conversions in proteins
(University of Waterloo, 2005)Better understanding of protein folding process can provide physical insights on the function of proteins and makes it possible to benefit from genetic information accumulated so far. Protein folding process normally ... -
The Development of an Average, Anatomically Based, Young Adult, GRIN Eye Model
(University of Waterloo, 2005)The purpose of this thesis is to describe the development of an anatomically based, young adult eye model, which includes a crystalline lens with a gradient refractive index (GRIN). This model will then be used to ... -
Taub-NUT Spacetime in the (A)dS/CFT and M-Theory
(University of Waterloo, 2005)In the following thesis, I will conduct a thermodynamic analysis of the Taub-NUT spacetime in various dimensions, as well as show uses for Taub-NUT and other Hyper-Kahler spacetimes. <br /><br /> Thermodynamic analysis ... -
Instabilities in Higher-Dimensional Theories of Gravity
(University of Waterloo, 2006)A number of models of nature incorporate dimensions beyond our observed four. In this thesis we examine some examples and consequences of classical instabilities that emerge in the higher-dimensional theories of gravity ... -
Development and Characterization of a Regeneratively Amplified Ultrafast Laser System with an All-Glass Stretcher and Compressor
(University of Waterloo, 2006)High-peak power laser systems are defined along with a brief introduction of the technology used in their development and application to the project. A review of concepts surrounding optical pulses, focusing on the ... -
Higher dimensional Taub-NUT spaces and applications
(University of Waterloo, 2006)In the first part of this thesis we discuss classes of new exact NUT-charged solutions in four dimensions and higher, while in the remainder of the thesis we make a study of their properties and their possible applications. ... -
Multifrequency Raman Generation in the Transient Regime
(University of Waterloo, 2006)Two colour pumping was used to investigate the short-pulse technique of Multifrequency Raman Generation (MRG) in the transient regime of Raman scattering. In the course of this study we have demonstrated the ability to ... -
Specific Heat of the Dilute, Dipolar-Coupled, Ising Magnet LiHo<sub><em>x</em></sub>Y<sub>1-<em>x</em></sub>F<sub>4</sub>
(University of Waterloo, 2006)The system LiHo<sub><em>x</em></sub>Y<sub>1-<em>x</em></sub>F<sub>4</sub> is a nearly perfect example of a dilute, dipolar-coupled Ising magnet and, as such, it is an ideal testing ground for many theories in statistical ... -
Interactions of Cationic Peptides and Ions with Negatively Charged Lipid Bilayers
(University of Waterloo, 2006)In this thesis we study the interactions of ions and cationic peptides with a negatively charged lipid bilayer in an ionic solution where the electrostatic interactions are screened. <br /><br /> We first examine the ... -
Observation of Resonant Electric Dipole-Dipole Interactions Between Cold Rydberg Atoms Using Microwave Spectroscopy
(University of Waterloo, 2006)This thesis reports the first observation of the resonant electric dipole-dipole interaction between cold Rydberg atoms using microwave spectroscopy, the observation of the magnetic field suppression of resonant interactions, ... -
Predicting nonpolymeric materials structure with real-space self-consistent field theory
(APS publishing, 2006-02-17)Polymer self-consistent field theory of the Edwards-Helfand kind is the state-of-the-art method for predicting the morphologies of block copolymer materials. The methodology of block copolymer self-consistent field theory ... -
Predicting the phases of a two-dimensional hard-rod system with real-space self-consistent field theory
(APS publishing, 2006-10-16)Polymer self-consistent field theory numerical tools are applied to a two-dimensional hard-rod colloidal system. Rods are represented through an interaction site model density functional theory that is derived and expressed ...