Index Catalog // ScholarsArchive@OSU

Aerial forest operations : mineral amendment project

Creator:: Cornell, Jennie L.
Abstract:: A helicopter operations problem was studied for a private forest landowner testing an experimental application of minerals on Douglas-fir (Pseudotsuga menziesil) in the Coast Range of Oregon to offset growth reductions from Swiss needle cast disease. A planning approach was needed to minimize costs for transportation and aerial application of...
Resource Type:: Capstone Project

Stochastic analysis of the nonlinear response transition behavior of an ocean system

Creator:: Yuk, Dongjun
Abstract:: The nonlinear response of an ocean system subjected to random excitations can exhibit very complex dynamic behaviors including jump phenomena and coexistence of attractors. In this study, the stochastic system response behavior of a simple (Duffing) oscillator under narrow-band random excitations is first examined in the subharmonic resonance region. A...
Resource Type:: Masters Thesis

A mathematical modeling framework for scheduling and managing multiple concurrent tasks

Creator:: Shakeri, Shakib
Abstract:: Occurrence of human error in highly complex systems, such as a cockpit, can be disastrous and/or overwhelmingly costly. Mismanagement of multiple concurrent tasks has been observed by researchers to be a type of repetitive human error in previous studies of accidents and incidents. This error may occur in the form...
Resource Type:: Dissertation

Forest biomass estimation with hemispherical photography for multiple forest types and various atmospheric conditions

Creator:: Clark, Joshua Andrew
Abstract:: The importance of accurately identifying inventories of domestic energy, including forest biomass, has increasingly become a priority of the US government and its citizens as the cost of fossil fuels has risen. It is useful to identify which of these resources can be processed and transported at the lowest cost...
Resource Type:: Dissertation

Effect of constituent materials and curing methods on the abrasion resistance and durability of high performance concrete for pre-cast pre-stressed bridge deck slabs

Creator:: Keshari, Shweta
Abstract:: This thesis is the consequence of a research effort undertaken by the School of Civil and Construction Engineering at Oregon State University and funded by the Oregon Department of Transportation (ODOT) and the Federal Highway Administration (FHWA). The principal objective of the effort was to reduce the life cycle cost...
Resource Type:: Masters Thesis

Development of microchannel arrays in aluminides

Creator:: Hasan, Hadi
Abstract:: Micro Energy and Chemical Systems (MECS) devices enable at least two areas of benefit due to the accelerated heat and mass transfer that can be accomplished in microchannels. First, MECS devices enable process intensification; the ability to reduce the volume of space needed to implement systems of thermal and chemical...
Resource Type:: Dissertation

A comparison of the value of forest plans developed under three levels of detail regarding management intentions

Creator:: Hirte, Sarah Rebecca
Abstract:: In the field of forest planning, assumptions regarding the appropriate modeling of management behavior, translated through management prescriptions, minimum harvest ages, green-up periods, and other variables are needed if a stand-level optimization process is not used to guide the selection of stand management regimes Forest planners thus generally have a...
Resource Type:: Masters Thesis

Tradeoffs associated with managing forested landscapes for multiple-uses

Creator:: Lichtenstein, Mark E.
Abstract:: This study focuses on the tradeoffs that exist for managing forested landscapes for biodiversity and timber production. Tradeoff evaluation is important to natural resource managers so they can understand the benefits and costs of alternative management prescriptions. The study examines three watersheds in the Oregon Coast Range and 166 terrestrial...
Resource Type:: Masters Thesis

Thinning aged Douglas-fir : an analysis of mobilization costs and a log bucking strategy for revenue improvement

Creator:: Pilkerton, Stephen J.
Abstract:: Contract harvest operations have become the preferred approach to reducing the largest cost component of timber production through free market competition amongst logging contractors bidding or negotiating for work. The goal of this research was to investigate economic components of harvesting operations not previously studied for steep slope thinning harvests...
Resource Type:: Dissertation

Economic modeling of tropical deforestation in Antioquia (Colombia), 1980-2000 : an analysis at a semi-fine scale with spatially explicit data

Creator:: Orrego, Sergio A.
Abstract:: This dissertation used land rent theory and an economic model of land-use conversion to examine the main drivers of the deforestation occurred in Antioquia,Colombia, between 1980 and 2000. Land-cover information at a semi-fine scale (1:25,000) obtained largely from aerial photography was employed to calculate deforestation. In addition, free international databases...
Resource Type:: Dissertation

Measuring costs of sequestering carbon in forest stands with different management regimes in western Oregon

Creator:: Zyrina, Olga A.
Abstract:: This project was a part of larger work that compared major factors controlling patterns of carbon dynamics in two regions of the globe, the Pacific Northwest, USA and northwestern Russia. It was funded through the NASA foundation (grant # NAG5- 6242). Human economic activity is causing the release of pollutants...
Resource Type:: Masters Thesis

Environmental durability of reinforced concrete deck girders strengthened with surface-bonded carbon fiber-reinforced polymer

Creator:: Sopal, Gautam Jayant
Abstract:: Long-term durability of surface-bonded carbon fiber-reinforced polymer (CFRP) for shear strengthening of reinforced concrete (RC) bridge members remains uncertain due to the limited field experience with these materials. This paper provides experimental results from the testing of full-scale RC bridge girder specimens after exposure to prolonged environmental exposure and combined...
Resource Type:: Masters Thesis

Radiative forcing and forest climate policy

Creator:: Thompson, Matthew P.
Abstract:: This thesis is comprised of two manuscripts that relate to forest-based management strategies in the context of market-based climate change mitigation policies. The work questions the appropriateness of a singular focus on carbon sequestration given the albedo effect and its possible countervailing climatic impacts. Through a review of salient literature...
Resource Type:: Masters Thesis

An application of regression tree methodology in freeway travel time estimation using speed as a proxy

Creator:: Wang, Lijuan
Abstract:: Accurate freeway travel time estimation is of increasing importance for the travelers’ information and route guidance system. A non-parametric statistical methodology known as regression trees is deployed in this research for dynamically and accurately estimating freeway travel times for the I5-I205 loop in the Portland Metro area of Oregon using...
Resource Type:: Masters Thesis

Optimizing the primary forest products supply chain : a multi-objective heuristic approach

Creator:: Hamann, Jeff D.
Abstract:: This thesis is a collection of four submitted manuscripts that present methods to assist forest ecosystem service managers wanting to develop operational sampling, monitoring, and production plans for a set of specific quantifiable ecosystem services, which are formulated as a series of general multi-objective optimization problems. The problems are solved...
Resource Type:: Dissertation

Evaluation of a prototype NIR system for Douglas-fir wood density estimation

Creator:: Belart Lengerich, Maria Francisca
Abstract:: Forest products companies in the U.S. face vigorous competition from other wood producers around the world and other industries (steel, aluminum, plastics, composites). To be competitive, forest companies need to control costs, sort and allocate logs to the most appropriate markets, and recover more value at time of harvest. Interest...
Resource Type:: Masters Thesis

In-forest log segregation based on acoustic measurement of wood stiffness

Creator:: Amishev, Dzhamal Y.
Abstract:: To remain competitive, the forest products industry needs to look for new and innovative processes and technologies to not only reduce costs but also to recover more value through the entire seedling-to-customer forest products supply chain. It is well recognized that measuring wood properties of logs in real time during...
Resource Type:: Dissertation

The economics of carbon sequestration in western Oregon forests

Creator:: Im, Eun Ho
Abstract:: This study considered regional forest policies for sequestering carbon in existing forests in western Oregon. A model of log markets in western Oregon was employed to examine the impacts of forest policy changes on future carbon stock, harvests, and management activities. A carbon tax program, as a mitigation option for...
Resource Type:: Dissertation

An analysis of technical efficiency and productivity growth in the Pacific Northwest sawmill industry

Creator:: Helvoigt, Ted L.
Abstract:: The objective of this project was to investigate technical efficiency and productivity growth in the Pacific Northwest sawmilling industry over the period 1968-2002. Productivity growth was decomposed into three components: technical change, efficiency change, and scale efficiency change. In addition, using econometric methods, changes in output elasticities and input substitution...
Resource Type:: Dissertation

Wood properties and use of sensor technology to improve optimal bucking and value recovery of Douglas-fir

Creator:: Acuna, Mauricio A.
Abstract:: There are a number of wood properties which affect the quality of forest products such as lumber and pulp. Of these, wood density is considered by some to be the single most important physical characteristic because it is an excellent predictor of strength, stiffness, hardness, and paper-making capacities. Accurately assessing...
Resource Type:: Dissertation

ScholarsArchive@OSU

Aerial forest operations : mineral amendment project

Stochastic analysis of the nonlinear response transition behavior of an ocean system

A mathematical modeling framework for scheduling and managing multiple concurrent tasks

Forest biomass estimation with hemispherical photography for multiple forest types and various atmospheric conditions

Effect of constituent materials and curing methods on the abrasion resistance and durability of high performance concrete for pre-cast pre-stressed bridge deck slabs

Development of microchannel arrays in aluminides

A comparison of the value of forest plans developed under three levels of detail regarding management intentions

Tradeoffs associated with managing forested landscapes for multiple-uses

Thinning aged Douglas-fir : an analysis of mobilization costs and a log bucking strategy for revenue improvement

Economic modeling of tropical deforestation in Antioquia (Colombia), 1980-2000 : an analysis at a semi-fine scale with spatially explicit data

Measuring costs of sequestering carbon in forest stands with different management regimes in western Oregon

Environmental durability of reinforced concrete deck girders strengthened with surface-bonded carbon fiber-reinforced polymer

Radiative forcing and forest climate policy

An application of regression tree methodology in freeway travel time estimation using speed as a proxy

Optimizing the primary forest products supply chain : a multi-objective heuristic approach

Evaluation of a prototype NIR system for Douglas-fir wood density estimation

In-forest log segregation based on acoustic measurement of wood stiffness

The economics of carbon sequestration in western Oregon forests

An analysis of technical efficiency and productivity growth in the Pacific Northwest sawmill industry

Wood properties and use of sensor technology to improve optimal bucking and value recovery of Douglas-fir

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