Browsing Theses by Title
Now showing items 9896-9915 of 15523
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Niceness assumptions for Learning Algorithms
(University of Waterloo, 2014-08-01)Various machine learning algorithms like Neural Networks, Linear Regression, Feature Learning etc. are being employed successfully in a wide variety of applications like computer vision, speech recognition, bioinformatics ... -
Nickel Isotope Geochemistry in Mine Waste System
(University of Waterloo, 2021-01-13)Metal stable isotope analyses have proven to make valuable contributions to the study of the biogeochemical cycling of metals and metalloids in the environment. Processes that control the release, mobility and fate of ... -
Nickel-Seeded Silicon Nanowires Grown on Graphene as Anode Material for Lithium Ion Batteries
(University of Waterloo, 2014-05-12)There is a growing interest for relying on cleaner and more sustainable energy sources due to the negative side-effects of the dominant fossil-fuel based energy storage and conversion systems. Cleaner, electrochemical ... -
Niigani Miinigowiziiwin (we give these gifts to the future)
(University of Waterloo, 2023-08-17)This dissertation is the ni di-bah-ji-mo-win (my personal story) of being an Anishinaabekwe (Ojibway woman) doctoral student, studying conventional systems thinking, complexity and transitions to sustainability discourse ... -
Nitrate sources and cycling at the Turkey Lakes Watershed: A stable isotope approach
(University of Waterloo, 2004)<p class=MsoNormal><span style="mso-spacerun: yes"> </span>Stable isotopic analysis of nitrate (<sup>15</sup>N/<sup>14</sup>N and <sup>18</sup>O/<sup>16</sup>O) was used to trace nitrate sources and cycling under ... -
Nitrogen Dynamics in a Harvested Rocky Mountain Catchment
(University of Waterloo, 2018-01-19)While the impacts of forest harvesting on nitrogen (N) are largely well documented, changes to watershed N following harvesting are difficult to characterize within steep, mountainous terrain creating uncertainty for ... -
The Nitrogen Legacy: Understanding Time Lags in Catchment Response as a Function of Hydrologic and Biogeochemical Controls
(University of Waterloo, 2016-09-23)Global population has seen a more than threefold increase over the last 100 years, accompanied by rapid changes in land use and a dramatic intensification of agriculture. Such changes have been driven by a great acceleration ... -
Nitrogen Removal From Natural Gas by Membrane Separation
(University of Waterloo, 2015-04-08)Canada is globally the third largest natural gas producer with a total production of 13.9 billion ft3/day. Natural gas is a naturally occurring mixture consisting of mainly CH4 and varying amounts of other gases such as ... -
Nitrogen-Doped Carbon Materials as Oxygen Reduction Reaction Catalysts for Metal-Air Fuel Cells and Batteries
(University of Waterloo, 2012-05-09)Metal air battery has captured the spotlight recently as a promising class of sustainable energy storage for the future energy systems. Metal air batteries offer many attractive features such as high energy density, ... -
Nitrogen-Doped Carbon Nanotubes and their Composites as Oxygen Reduction Reaction Electrocatalysts for Low Temperature Fuel Cells
(University of Waterloo, 2011-05-03)The extensive amount of platinum required in order to facilitate the oxygen reduction reaction (ORR) occuring at the cathode of low temperature fuel cells provides cost limitations to the sustainable commercialization of ... -
Nitrous oxide and nitrate in the Grand River, Ontario: Sources, production pathways and predictability
(University of Waterloo, 2013-12-13)The increased use of synthetic nitrogen fertilizers since the early 1900s has resulted in greater food production but also problems with nitrogen pollution in freshwaters. Nitrate (NO3-) is a common pollutant in rivers and ... -
Nitrous oxide dynamics in a riparian wetland of an agricultural catchment in Southern Ontario
(University of Waterloo, 2009-04-28)Riparian zones (RZ) are known to act as buffers, reducing the transfer of potentially harmful nutrients from agricultural fields to surface water bodies. However, many of the same processes in the subsurface that help to ... -
Nitrous Oxide Production in the Grand River, Ontario, Canada: New Insights from Stable Isotope Analysis of Dissolved Nitrous Oxide
(University of Waterloo, 2008-10-07)Nitrous oxide (N₂O) is a powerful greenhouse gas, and its atmospheric concentration is increasing dramatically. N₂O is produced through the microbially-mediated processes of nitrification and denitrification. Since these ... -
Nitrous Oxide State Estimation in Hybrid Rocket Oxidizer Tanks
(University of Waterloo, 2017-02-22)There is an increasing interest in the use of hybrid rockets to accomplish tasks that require precise control of the craft. Fuel is being consumed as the craft is propelled, causing the mass of the rocket to change. In ... -
Nitroxide-mediated controlled degradation of polypropylene
(University of Waterloo, 2006)Nitroxide-mediated Controlled Degradation of Polypropylene <br /> Controlled-rheology polypropylene resins (CRPP) have been produced industrially for years using reactive extrusion processes employing peroxides as free ... -
Nixonland Revisited: A History of Populist Communication
(University of Waterloo, 2009-09-22)The goal of this thesis was to validate journalist Rick Perlstein’s assertion in Nixonland: The Rise of a President and the Fracturing of America (2008) that the foundational dialectic of the 1960s “has not yet ended.” ... -
Ni₀.₀₅Mo₃Sb₅.₄Te₁.₆ Based Thermoelectric Nanocomposites
(University of Waterloo, 2016-05-04)Thermoelectric (TE) materials have the capability to convert thermal energy into useful electrical energy. Sustainable energy production and its utilization are among the many challenges that humankind is facing today. ... -
NMR Studies of Protein and Peptide Structure and Dynamics
(University of Waterloo, 2016-04-18)Calmodulin (CaM) is a small, acidic cytosolic calcium binding protein that responds to increases in intracellular Ca2+ concentrations. It is proposed to be involved in binding to and regulating over 300 functionally and ... -
NMR Study of Calmodulin’s Interaction with Inducible Nitric Oxide Synthase
(University of Waterloo, 2010-01-22)The increase of calcium in the cell can induce cellular functions such as fertilization, cell division and cell communication. Calcium (Ca2+) carries out these processes through proteins called calcium sensors. An important ... -
NMR STUDY OF EXCHANGE AND HYDRATION SITE IDENTIFICATION IN MCM-41
(University of Waterloo, 2007-01-16)Deuteron 1D and 2D NMR spectroscopy was used to study the dynamics of water molecules within the mesoporous material MCM-41. The deuteron spectra show three magnetization components for a sample hydrated to a 0.2 monolayer ...