Browsing Science (Faculty of) by Title
Now showing items 2759-2778 of 2879
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Twisted Holography: The Examples of 4d and 5d Chern-Simons Theories
(University of Waterloo, 2022-09-29)Twisted holography is a duality between a twisted supergravity, and a twisted supersymmetric gauge theory living on the D-branes in the supergravity. The main objectives of this duality is the comparison between the algebra ... -
Two centuries of nitrogen dynamics: Legacy sources and sinks in the Mississippi and Susquehanna River Basins
(American Geophysical Union, 2017-01-07)Global flows of reactive nitrogen (N) have increased significantly over the last century in response to agricultural intensification and elevated levels of atmospheric deposition. Despite widespread implementation conservation ... -
Two Dimensional Genetic Approach to the Development of a Controllable Lytic Phage Display System
(University of Waterloo, 2013-02-22)Bacteriophage Lambda (λ) has played a historical role as an essential model contributing to our current understanding of molecular genetics. Lambda’s major capsid protein “gpD” occurs on each capsid at 405 to 420 copies ... -
Two of the Mechanims Used by Bacteria to Modify the Environment: Quorum Sensing and ACC Deaminase
(University of Waterloo, 2009-10-27)Quorum sensing (QS) cell-cell communication systems are utilized by bacteria to coordinate their behaviour according to cell density. Several different types of QS signal molecules have been identified, among which ... -
Two Pb2+-specific DNAzymes with opposite trends in split-site-dependent activity
(Royal Society of Chemistry, 2014-05-04)By splitting the catalytic core of DNAzymes into two halves, two Pb2+-specific DNAzymes retain partial activity, while they show opposite trends of activity as a function of the split site, revealing important nucleotides ... -
Two successive calcium-dependent transitions mediate membrane binding and oligomerization of daptomycin and the related antibiotic A54145
(Elsevier, 2016-09)Daptomycin and A54145 are homologous lipopeptide antibiotics that permeabilize the cell membranes of Gram-positive bacteria. Membrane permeabilization depends on the presence of both phosphatidylglycerol (PG) and calcium, ... -
Two-Color Chirped-Pulse Amplification Fiber Amplifier, for Mid-Infrared Generation
(University of Waterloo, 2010-01-22)The goal of this thesis is developing a two-color Ytterbium (Yb) fiber amplifier system that can be used for generation of mid-infrared radiation. Previously, our group reported generating 20 µW of average power, at a ... -
Two-Color Ultrafast Yb:Fiber Chirped Pulse Amplifier for Mid-Infrared Generation and Sensitive Mid-Infrared Detector Based on Extreme Non-Degenerate Two Photon Absorption in GaAs
(University of Waterloo, 2014-09-12)This thesis outlines the development and optimization of a two-color three-stage ultrafast Yb:fiber chirped pulse amplifier for the generation of mid-infrared (MIR) radiation and a novel sensitive mid-infrared detector by ... -
Type 2 diabetes mellitus and the prevalence of age-related cataract in a clinic population.
(University of Waterloo, 2012-01-24)Purpose: The prevalence of diabetes (DM) is increasing globally with type 2 diabetes (T2DM) being primarily responsible for this alarming trend. Age and DM have been associated with an increased prevalence of AR cataract ... -
Ultra Low Dissipation Silicon Nanowire Resonator Arrays for Scanning Probe Applications
(University of Waterloo, 2020-01-23)This work describes the fabrication and characterization of silicon nanowire oscillators for use in ultra-high sensitivity force detection. These structures are optimized for use as scanning probes by fabricating ... -
Ultra-Cold CsLi Molecules as a Platform for Quantum Information Processing
(University of Waterloo, 2022-12-19)Despite their proposal 40 years ago, quantum computers are still in their infancy, with a panoply of various systems demonstrated as potential methods of quantum information processing. Rydberg atoms are a leading platform, ... -
Ultra-low temperature dilatometry
(University of Waterloo, 2010-10-28)This thesis presents research of two novel magnetic materials, LiHoF4 and Tb2Ti2O7. Experiments were performed at low temperatures and in an applied magnetic field to study thermal expansion and magnetostriction using a ... -
Ultrafast coincidence characteristics of entangled photons towards entangled two-photon absorption
(University of Waterloo, 2014-01-28)Nonlinear optics has had extensive application into a vast array of scientific fields. One such nonlinear process, two-photon absorption (TPA), has had a wildly successful adoption into the field of biological imaging and ... -
Ultrafast Dynamical Studies of Two Dimensional Transition Metal Dichalcogenides
(University of Waterloo, 2022-08-22)Layer transition metal dichalcogenides (TMDCs) have attracted great attention due to their unique electronic and optical properties. Specifically, single-layer semiconducting TMDCs with their direct band gaps in the visible ... -
Ultrafast Imaging of Molecular Processes in Small Molecules Using Coulomb Explosion Imaging
(University of Waterloo, 2017-09-27)Molecular structure and dynamics of three molecules (carbonyl sulfide, acetylene, and ethylene) are examined using various implementations of the Coulomb Explosion Imaging technique. Soft x-rays from the Canadian Light ... -
Ultrafast manipulation of single photons using dispersion and sum-frequency generation
(University of Waterloo, 2016-12-01)Single photons provide a natural platform for quantum communication and quantum networking, as they can be entangled in many degrees of freedom and maintain coherence over long-distance links. However, while their minimal ... -
Ultrafast Metrology in the Quantum Domain
(University of Waterloo, 2019-02-15)Single photons are a natural platform for quantum technologies as they support entanglement in many degrees of freedom and are inherently well protected from a detrimental type of noise called decoherence. In order to ... -
An Ultrafast Source of Polarization Entangled Photon Pairs based on a Sagnac Interferometer
(University of Waterloo, 2009-01-26)This thesis describes the design, development, and implementation of a pulsed source of polarization-entangled photons using spontaneous parametric down-conversion in a Sagnac interferometer. A tangle of 0.9286 ± 0.0015, ... -
Ultrahigh Nanoparticle Stability against Salt, pH, and Solvent with Retained Surface Accessibility via Depletion Stabilization
(American Chemical Society, 2012-06-20)For many applications, it is desirable to stabilize colloids over a wide range of buffer conditions while still retaining surface accessibility for adsorption and reaction. Commonly used charge or steric stabilization ... -
Ultrahigh Resolution Optical Coherence Tomography for Non-invasive Imaging of Outer Retina Degeneration in Rat Retina
(University of Waterloo, 2013-02-22)This project initiated with the aim for improving the ultrahigh resolution optical coherence tomography (UHR-OCT) system performance by considering the limitations to the axial OCT resolution for in vivo imaging of human ...