Browsing Waterloo Research by Issue Date
Now showing items 61-80 of 2463
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Development and characterization of a laminar aerosol flow tube
(AIP, 2006-03)We have developed a new laminar aerosol flow tube (AFT) to study transformations such as ice nucleation, deliquescence, and efflorescence in model atmospheric aerosols. The apparatus consists of four sections which can be ... -
Flow visualization of natural convection in a tall, air-filled vertical cavity
(Elsevier, 2006-03-01)Natural convection of air in a tall vertical cavity was studied using a smoke patterns and interferometry. Experiments covered Rayleigh numbers of 4850 < Ra < 54,800 and aspect ratio A ≈ 40. Secondary cells were noted at ... -
Response of vegetation and net ecosystem carbon dioxide exchange at different peatland microforms following water table drawdown
(American Geophysical Union, Wiley, 2006-05-17)Northern peatlands are significant stocks of terrestrial soil carbon, and it has been predicted that warmer temperatures and lower water tables resulting from climate change will convert these ecosystems into sources for ... -
Prime analogues of the Erdős–Kac theorem for elliptic curves
(Elseiver, 2006-08)Let E/Q be an elliptic curve. For a prime p of good reduction, let E(Fp) be the set of rational points defined over the finite field Fp. We denote by ω(#E(Fp)), the number of distinct prime divisors of #E(Fp). We prove ... -
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 ... -
In-plane and through-plane gas permeability of carbon fiber electrode backing layers
(Elsevier, 2006-11-08)The absolute gas permeability of several common gas diffusion layer (GDL) materials for polymer electrolyte membrane fuel cells was measured. Measurements were made in three perpendicular directions to investigate anisotropic ... -
Response of peatland carbon dioxide and methane fluxes to a watertable drawdown experiment
(American Geophysical Union, Wiley, 2007-02-07)Northern peatlands play an important role in the global carbon cycle representing a significant stock of soil carbon and a substantial natural source of atmospheric methane (CH4). Peatland carbon cycling is affected by ... -
Effect of Temperature and Pressure on Surface Tension of Polystyrene in Supercritical Carbon Dioxide
(ACS Publications, 2007-02-15)The surface tension of polymers in a supercritical fluid is one of the most important physicochemical parameters in many engineering processes, such as microcellular foaming where the surface tension between a polymer melt ... -
OMG I can IM the QEII: Networking Through chat
(2007-05-22)Presentation slides as presented at the Newfoundland and Labrador Library Association (NLLA) Conference, 2007. Outlines virtual library reference program in the context of the QEII, a chat program offered at Memorial ... -
Heat Transfer Analysis Of Windows With Venetian Blinds: A Comparative Study
(2007-06)The potential to reduce building load and annual energy consumption is widely recognized in the use of shading devices to control solar gain. Consequently, the ability to include and model shading layers in complex glazing ... -
A Simplified Method For Calculating The Effective Solar Optical Properties Of a Drapery
(2007-06)The use of draperies to control solar gain through windows is common in residential and commercial buildings and their potential for reduction of building peak load and annual energy consumption is recognized to be large. ... -
A fast variational framework for accurate solid-fluid coupling
(Association for Computing Machinery, 2007-07)Physical simulation has emerged as a compelling animation technique, yet current approaches to coupling simulations of fluids and solids with irregular boundary geometry are inefficient or cannot handle some relevant ... -
Comparison of model-predicted and measured moment arms for the rotator cuff muscles
(Elsevier, 2007-07)Background The ability of mathematical models of the shoulder to accurately replicate physiological muscle moment arms is unknown. The purpose of this study was to compare model-predicted and experimentally measured moment ... -
The Unrestricted Variant of Waring's Problem in Function Fields
(Adam Mickiewicz University, 2007-09)Let J k q [t] denote the additive closure of the set of k th powers in the polynomial ring Fq[t], defined over the finite field Fq having q elements. We show that when s>k + 1 and q>k 2k+2 , then every polynomial in ... -
Bidirectional mapping between self-consistent field theory and molecular dynamics
(AIP Publishing, 2007-10-08)A bidirectional mapping scheme that bridges particle-based and field-based descriptions for polymers is presented. Initial application is made to immiscible homopolymer blends. The forward mapping (upscaling) approach ... -
Pore network modeling of fibrous gas diffusion layers for polymer electrolyte membrane fuel cells
(Elsevier, 2007-11-08)A pore network model of the gas diffusion layer (GDL) in a polymer electrolyte membrane fuel cell is developed and validated. The model idealizes the GDL as a regular cubic network of pore bodies and pore throats following ... -
The influence of peat volume change and vegetation on the hydrology of a kettle-hole wetland in Southern Ontario, Canada
(International Mire Conservation Group and International Peat Society, 2007-12)Links between local hydrology and vegetation type exist in wetlands, yet it is unclear what role peat volume change plays in these interactions. We measured peat volume change and hydraulic conductivity (Kfield) at three ... -
Particle Distributions in a Block Copolymer Nanocomposite
(American Chemical Society, 2008)Self-consistent-field theory is used to predict the center-of-mass distribution of spherical nanoparticles embedded in the lamellar phase of a diblock copolymer melt. The calculation is performed in the dilute limit, where ... -
Thermal Resistance of a Window with an Enclosed Venetian Blind: A Simplified Model
(American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2008)Solar gain has a strong influence on building energy consumption and peak cooling load. Venetian blinds are routinely used to control solar gain. Software based on 1-D models is available to accurately predict the thermal ... -
Calculating Center-Glass Performance Indices of Glazing Systems with Shading Devices
(American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2008)Building energy consumption and loads are strongly influ-enced by solar gain and heat transfer through the centre-glass area of windows. Methods have been devised to calculate the corresponding energy performance indices ...