Index Catalog // ScholarsArchive@OSU

Wave-by-wave Forecasting of Sea Surface Elevation for WEC Applications Utilizing NARX Neural Networks

Creator:: Gillespie, Alice
Abstract:: Forecasting of ocean waves over a short duration on the order of tens of seconds was approached with the optimization of wave energy conversion in mind. This study outlines the development of an artificial neural network model, specifically the Nonlinear Autoregressive Network with Exogenous Input (NARX), to predict a wave-by-wave...
Resource Type:: Masters Thesis
Full Text:: like to extend a round of thanks to committee members Dr. Istok, Dr. Batten, and Dr. Sharp for

Water and solute transport : modeling and application to water conservation in layered soil

Creator:: Mohammed, Fareed H. A. N.
Abstract:: Sandy soils are among the least productive soils because of their inability to store adequate water for plant growth. Their high percolation rate not only allows water to move quickly beyond the root zone, but also washes nutrients below the reach of plant roots. High evaporation occurs from the soil...
Resource Type:: Dissertation
Full Text:: , Professor Jonathan Istok, Professor Arsalan Mazaheri, and Professor Ronald Neilson. My deepest thanks and

Visualization and characterization of biofilm spatial distribution in porous media using x-ray computed microtomography

Creator:: Iltis, Gabriel C.
Abstract:: This work focuses primarily the development of methods for imaging microbial biofilms in opaque porous media using x-ray computed microtomography (CT). Two methods for evaluating biofilms in porous media are presented. The first focuses on the addition of silver-coated, hollow glass microspheres to a biofilm-containing micro-model. The silver-coated microspheres affix...
Resource Type:: Dissertation
Full Text:: : _____________________________________________________ Dorthe Wildenschild Brian D. Wood This work focuses primarily the development of

Utilization of natural and supplemental biofuels for harvesting energy from marine sediments

Creator:: Nielsen, Mark E.
Abstract:: A benthic microbial fuel cell (BMFC) is an electrochemical device that generates current from the redox gradient at the sediment-water interface. Early prototypes had anodes buried in anoxic sediments and cathodes in overlying water. The BMFCs described in this dissertation are based on a chamber design that enables the use...
Resource Type:: Dissertation
Full Text:: and Hong Liu provided helpful reviews of my manuscripts while Jim McManus and Jack Istok provided

Roughness and geometry effects of engineered log jams on 1-D flow characteristics

Creator:: Valverde, Rachelle S.
Abstract:: The re-introduction of large woody debris (LWD) into streams and rivers for stream restoration purposes is rapidly growing. Engineered log jams (ELJs) are man-made structures intended to mimic natural LWD structures, designed and installed to protect stream banks from erosion while increasing habitat diversity. Several studies have evaluated the flow...
Resource Type:: Masters Thesis
Full Text:: Roughness and Geometry Effects of Engineered Log Jams on 1-D

Pressure effects on density-difference driven stratified flow : CFD model of DCC event in the HTGR

Creator:: Magnusson, Jill E.
Abstract:: In a Modular High Temperature Gas Reactor (MHTGR), the Depressurized Conduction Cooldown (DCC) event can be separated into three distinct stages: 1) depressurization, 2) air ingress and, 3) natural circulation. During normal operations, the HTGR utilizes forced convection to move the helium coolant through the reactor core. Thus, during normal...
Resource Type:: Masters Thesis
Full Text:: " rq heat flux S source term Φ dissipation g gravity g’ reduced gravity d hydraulic

Practical Application of the Finite Element Method for Vehicle System Loads Analysis

Creator:: Weitzman, Paul M.
Abstract:: This work develops the loads, boundary conditions, and model construction techniques used to create a high-level vehicle analysis model. The loads are derived from the overall performance parameters of the vehicle, which include 3 axis accelerations and aerodynamic forces from Computational Fluid Dynamics outputs. The boundary condition of the analysis...
Resource Type:: Masters Thesis
Full Text:: ............................................................................ 79 D MOMENT OF INERTIA APPROXIMATION........................................................ 81 E

Multivariate geostatistical analysis of evapotranspiration and elevation for various climatic regimes in Oregon

Creator:: Martinez-Cob, Antonio
Resource Type:: Dissertation
Full Text:: Morris, Dr. Jonathan Istok, Dr. Harry Mack, Dr. David Thomas and Dr. Don Grabe. I would like to express

Modeling of Non-Spherical Particle Dynamics in a Non-Uniform Flow

Creator:: Alshehri, Ahmad S.
Abstract:: Turbulent flow with suspended, non-spherical particles can be found in nature and several industrial applications. Although turbulence with dispersed spherical particles has been studied extensively, modeling the dynamics of non-spherical particles in a turbulent flow has not been studied extensively. Motion of spherical particles in complex flows is typically captured...
Resource Type:: Masters Thesis
Full Text:: master’s thesis committee: Dr. Deborah Pence, Dr. James Liburdy, and Dr. Jonathan Istok. I would like to

Experimental study of impulse turbines and permanent magnet alternators for pico-hydropower generation

Creator:: Cobb, Bryan R.
Abstract:: Increasing access to modern forms of energy in developing countries is a crucial component to eliminating extreme poverty around the world. Pico-hydro schemes (less than 5-kW range) can provide environmentally sustainable electricity and mechanical power to rural communities, generally more cost-effectively than diesel/gasoline generators, wind turbines, or solar photovoltaic systems....
Resource Type:: Masters Thesis
Full Text:: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 NOMENCLATURE A area d diameter f friction factor g gravitational

ScholarsArchive@OSU

Wave-by-wave Forecasting of Sea Surface Elevation for WEC Applications Utilizing NARX Neural Networks

Water and solute transport : modeling and application to water conservation in layered soil

Visualization and characterization of biofilm spatial distribution in porous media using x-ray computed microtomography

Utilization of natural and supplemental biofuels for harvesting energy from marine sediments

Roughness and geometry effects of engineered log jams on 1-D flow characteristics

Pressure effects on density-difference driven stratified flow : CFD model of DCC event in the HTGR

Practical Application of the Finite Element Method for Vehicle System Loads Analysis

Multivariate geostatistical analysis of evapotranspiration and elevation for various climatic regimes in Oregon

Modeling of Non-Spherical Particle Dynamics in a Non-Uniform Flow

Experimental study of impulse turbines and permanent magnet alternators for pico-hydropower generation

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