Index Catalog // ScholarsArchive@OSU

Multi-objective Optimization of Reservoir Operation Under Uncertainty with Robust and Flexible Decision Variables

Creator:: Hosseini, Parnian
Abstract:: Optimization of reservoir operation is involves various competing objectives for a scarce resource (water). To find the optimal operation of reservoirs, it is essential to consider multiple objectives simultaneously. There are various sources of uncertainty associated with the reservoir operation problem that should be considered as well. The overarching goal...
Resource Type:: Dissertation
Full Text:: of decision variables. The proposed methodology is tested for two mathematical test problems and

Machine Learning Methods for Computational Sustainability

Creator:: Liu, Liping
Abstract:: Maintaining the sustainability of the earth’s ecosystems has attracted much attention as these ecosystems are facing more and more pressure from human activities. Machine learning can play an important role in promoting sustainability as a large amount of data is being collected from ecosystems. There are at least three important...
Resource Type:: Dissertation
Full Text:: classification model for the learning problem. The thesis also analyzes the learnability of the superset label

The Factors Affecting the Diets of Groundfish in the Gulf of Alaska : Ecological and Modeling Considerations

Creator:: Thompson, Kevin A.
Abstract:: Marine systems undergo changes in community composition over time as a result of a variety of environmental and anthropogenic factors. Understanding these community changes and the factors that drive them is critical for ecosystem management of marine resources. The Gulf of Alaska (GOA) is a large marine ecosystem that includes...
Resource Type:: Dissertation
Full Text:: changed the diets of key groundfish predators in the model based on our previous results for three

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Creator:: Tepley, Alan J.
Abstract:: Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
Resource Type:: Dissertation
Full Text:: Cascade Range. Major objectives were to (1) develop a conceptual model of fire-mediated pathways of

Bioenergetics individual based model explorations of juvenile coho salmon growth during their first summer on the Oregon shelf

Creator:: Reser, Brendan Alexander
Abstract:: Salmon survival and eventual recruitment success have long been thought to be determined within the first summer following ocean migration. Juvenile growth during this period is largely influenced by ocean conditions such as temperature, prey availability, abundance, and quality. Shifts in these conditions due to climatic perturbations are particularly prevalent...
Resource Type:: Masters Thesis
Full Text:: Oceanography presented on December 15, 2009. Title: Bioenergetics Individual Based Model Explorations of

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Creator:: Somes, Christopher J.
Abstract:: We present a new nitrogen isotope model incorporated into the three-dimensional ocean component of a global Earth System Climate Model designed for millennial timescale simulations. The model includes prognostic tracers for the stable nitrogen isotopes, ¹⁴N and ¹⁵N, in the nitrate (NO₃ˉ), phytoplankton, zooplankton, and detritus variables of the marine...
Resource Type:: Masters Thesis
Full Text:: presented on June 30, 2009. Title: Nitrogen Isotopes in a Global Ocean Biogeochemical Model

Spatially explicit inter-temporal forest management decision under the risk of fire

Creator:: Konoshima, Masashi
Abstract:: This paper presents a framework for analyzing efficient spatial allocation of forest management efforts - fuel treatment and harvest - under the risk of fire. The framework integrates a fire behavior model and a spatially-explicit stochastic dynamic optimization model. I investigate the effects of spatial interaction across plots during forest...
Resource Type:: Dissertation
Full Text:: integrates a fire behavior model and a spatially-explicit stochastic dynamic optimization model. I

Structural and physiological changes with stand age : use of a process-based model to compare carbon and water fluxes in young and old-growth Douglas-fir/western hemlock forest stands

Creator:: Licata, Julian A.
Abstract:: Many studies have shown that net primary production in old-growth Douglas-fir/western hemlock forests is lower than in younger forests in similar sites, although the cause is still not clear. One possibility is that overall carbon assimilation, or GPP, is lower in older forests. However, it is difficult to measure GPP...
Resource Type:: Masters Thesis

A numerical study of the response of Lake Kinneret to wind forcing

Creator:: Vernieres, Guillaume
Abstract:: Lake Kinneret is Israel's only fresh water lake (unless you count the Dead Sea). It spans roughly 20km from north to south, and about 12km at its widest east west extent. It is not quite 50m deep at its deepest point. In late spring, the lake stratifies significantly and remains...
Resource Type:: Masters Thesis
Full Text:: lake. 6 2. MODEL THEORY The response of the lake to wind forcing is only studied during the six

Estimating large woody debris recruitment from adjacent riparian areas

Creator:: Minor, Kathleen P.
Abstract:: Large woody debris recruitment to streams from adjacent riparian forests influences stream channel morphology, sediment routing, and fish habitat. A mathematical model was developed to 1) determine whether the trees in a stand adjacent to a stream, upon falling, would provide large woody debris of a specified size to the...
Resource Type:: Capstone Project

ScholarsArchive@OSU

Multi-objective Optimization of Reservoir Operation Under Uncertainty with Robust and Flexible Decision Variables

Machine Learning Methods for Computational Sustainability

The Factors Affecting the Diets of Groundfish in the Gulf of Alaska : Ecological and Modeling Considerations

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Bioenergetics individual based model explorations of juvenile coho salmon growth during their first summer on the Oregon shelf

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Spatially explicit inter-temporal forest management decision under the risk of fire

Structural and physiological changes with stand age : use of a process-based model to compare carbon and water fluxes in young and old-growth Douglas-fir/western hemlock forest stands

A numerical study of the response of Lake Kinneret to wind forcing

Estimating large woody debris recruitment from adjacent riparian areas

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