Index Catalog // ScholarsArchive@OSU

The choice of the optimal sawtimber harvesting system (a theoretical approach based on mathematical programming)

Creator:: Mikkonen, Esko
Abstract:: An extension of the sensitivity analysis of linear programming, called parametric programming is used in determining optimal sawtimber logging system mix. The five logging systems under study are manual log-length, system, log-length processor and harvester systems, manual tree-length system and tree-length harvester system. In conditions where it is not exactly...
Resource Type:: Capstone Project

Simulation of a helicopter yarding system in old growth forest stands

Creator:: LeDoux, Chris B.
Abstract:: Helicopter yarding systems have become a popular tool in removing timber from steep slopes, sensitive soils, limited access areas, and environmentally sensitive stands. Little is known about the system's dynamics. This study is part of a research project to explore "advanced" logging systems as to their economic efficiency and environmental...
Resource Type:: Masters Thesis

Development and comparison of stand-level bucking optimization methods

Creator:: Laroze, André J.
Abstract:: Heuristics based on Monte-Carlo Integer Programming (MCIP) and Tabu Search (TS) techniques were developed for generating easily implementable bucking rules that are applicable to entire stands (as opposed to individual stem classes), and for selecting the rule-set that provides the best feasible solution (given log prices and market constraints). A...
Resource Type:: Dissertation

A model for the determination of optimum setting dimensions for tractor yard/swing operations

Creator:: Nickerson, Devon B.
Abstract:: A problem of interest to forest managers is the optimum arrangement of truck roads and landings for economical logging operations. This problem becomes more complex if,a combined yarding and swinging operation is considered. I,t is possible to formulate a mathematical model to express the cost per unit volume for a...
Resource Type:: Masters Thesis
Full Text:: considered. It is possible to formulate a mathematical model to express the cost per unit volume for a

Linking a growth model with logging production costing

Creator:: Bergan, Ernest E.
Abstract:: A model (called MERLIN) is presented that can allow the resource manager to consider the combined effects of silvicultural treatments and their effect on expected logging production and costs. This integrated analysis takes place within the framework of personal computer software readily available to most managers. This integration is accomplished...
Resource Type:: Masters Thesis

Log breakdown using dynamic programming and 3-D log shape

Creator:: Zeng, Yimin
Abstract:: A log breakdown model, SAW3D, was developed to optimize lumber recovery from logs of any shape in 3- dimensional space. The program uses a polygonal cross section representation of logs; three nested dynamic programming (DP) algorithms to optimize log breakdown, flitch and cant edging, and trimming operations; and a simple...
Resource Type:: Masters Thesis

LOGCOST a harvest cost model for southwestern Idaho

Creator:: Giles, Robert Steven
Abstract:: LOCCOST is an interactive computer program that predicts stump to mill logging costs, stumpage and net present value of a harvest based on stand data, pond value and logging parameters, entered by the user. The program is intended for use by foresters to evaluate the economics of different stand management...
Resource Type:: Capstone Project

A method to improve consumer surplus estimates from truncated recreation demand data

Creator:: Weidner, Kerri L
Abstract:: A method is presented in this study for improving empirical travel cost analyses when truncated data are available. The analysis expands upon a Monte Carlo study conducted by Riyadi (1993) which compared the coefficient and consumer surplus estimates for five travel cost estimators using both truncated and censored data. Riyadi...
Resource Type:: Masters Thesis
Full Text:: also used to fit a travel cost model to data from a 1989 angler survey. These results were compared to

Countertrade, a transaction costs approach

Creator:: Kelly, Sharon
Abstract:: New types of exchange arrangements are becoming increasingly popular for a wide range of goods traded internationally. Several types of countertrade arrangements have been identified, ranging from pure barter to more elaborate schemes where only a portion of the trade is "paid for" in goods, including bilateral trading agreements with...
Resource Type:: Dissertation
Full Text:: economists as well as by government officials. In this paper a partial equilibrium model of exchange is

A simulation of the comparative costs and benefits of skyline strip thinning

Creator:: LeDoux, Chris B.
Abstract:: Strip thinning is recognized as a way of commercial thinning young-growth stands. strip thinning has been used worldwide. The purpose of this study was to explicitly evaluate the costs and benefits associated with skyline strip thinning in young Douglas-fir (Pseudotuqo menzesii Franco) stands in the Pacific Northwest and to compare...
Resource Type:: Dissertation

Integrating learning from examples into the search for diagnostic policies

Creator:: Oregon State University. Dept. of Computer Science, Bayer-Zubek, Valentina, and Dietterich, Thomas Glen
Abstract:: This paper studies the problem of learning diagnostic policies from training examples. A diagnostic policy is a complete description of the decision-making actions of a diagnostician (i.e., tests followed by a diagnostic decision) for all possible combinations of test results. An optimal diagnostic policy is one that minimizes the expected...
Resource Type:: Research Paper
Full Text:: modeled as a Markov Decision Problem (MDP). An MDP is a mathematical model for describing the interaction

Modeling biomass transport on single lane forest roads and monitoring GPS accuracy for vehicle tracking under different forest canopy conditions

Creator:: Simwanda, Matamyo
Abstract:: The transportation of wood and biomass resources from landing and other collection locations to processing and distribution sites is a substantial cost within the wood supply chain. These high costs provide a basis for research aimed at improving biomass transportation planning decisions and potentially reducing biomass transportation costs. Chip vans...
Resource Type:: Masters Thesis
Full Text:: Operating Cost Model (VOCM) developed by Sullivan in 1977. The study developed regression equations for

A method of selection of cable harvesting machines for Vermont

Creator:: Stirler, Dennis John
Abstract:: There is much interest in the State of Vermont in cable harvesting. Since there are no time studies available for cable harvesting with various machines in Vermont, it is necessary to arrive at production and cost levels by a different method. The method chosen for this paper is made up...
Resource Type:: Capstone Project

Monte Carlo study of several methods for estimating linear demand for outdoor recreation from censored and truncated data

Creator:: Riyadi, Dedi M. M. (Dedi M. Masykur)
Abstract:: Objective of this study was to compare accuracy of several travel cost methods, by employing Monte Carlo simulations in the single site framework. Estimates from five methods were compared to the "true" travel cost coefficient and "true" consumer surplus. Each method was ranked, using the root mean squared error (RMSE)...
Resource Type:: Dissertation
Full Text:: ITS USE IN THE TRAVEL COST MODEL STUDIES 48 The Monte Carlo Experiment 48 Previous Monte Carlo

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
Full Text:: . CONTRIBUTION OF AUTHORS Dr. John Sessions guided the formulation of the mathematical model and was

ScholarsArchive@OSU

The choice of the optimal sawtimber harvesting system (a theoretical approach based on mathematical programming)

Simulation of a helicopter yarding system in old growth forest stands

Development and comparison of stand-level bucking optimization methods

A model for the determination of optimum setting dimensions for tractor yard/swing operations

Linking a growth model with logging production costing

Log breakdown using dynamic programming and 3-D log shape

LOGCOST a harvest cost model for southwestern Idaho

A method to improve consumer surplus estimates from truncated recreation demand data

Countertrade, a transaction costs approach

A simulation of the comparative costs and benefits of skyline strip thinning

Integrating learning from examples into the search for diagnostic policies

Modeling biomass transport on single lane forest roads and monitoring GPS accuracy for vehicle tracking under different forest canopy conditions

A method of selection of cable harvesting machines for Vermont

Monte Carlo study of several methods for estimating linear demand for outdoor recreation from censored and truncated data

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

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