Index Catalog // ScholarsArchive@OSU

An economic model of soil compaction in forestry

Creator:: Stewart, Rodney Aloysius
Abstract:: A model is presented which predicts the net present value of a stand level multi-entry harvest plan. The model accounts for potential volume losses due to harvest-related soil compaction. The goal of this project was to answer five economic questions about the issue of soil compaction in forestry. The five...
Resource Type:: Capstone Project

A simulation of the operation of a log landing for a heli-stat airship in old-growth timber

Creator:: Gerstkemper, John C.
Abstract:: This paper discusses the development of a computer simulation program for the operation of a log landing for the proposed Helistat airship. The first part of the paper describes the time study used to develop production rates for the chasers, buckers, front-end loaders, and skidders to be used on the...
Resource Type:: Capstone Project

Predicting skidder productivity : a mobility approach

Creator:: Gibbons, Daniel J.
Abstract:: The principles of mobility are applied to the forest setting to simulate the movement of logs with a rubber tired-skidder. A computer program was written to perform the analysis . Vehicle-terrain and logterrain interactions are the resistances which must be overcome by the available vehicle power. The rate at which...
Resource Type:: Capstone Project

Skyline thinning production rate equations using the thin simulation model

Creator:: Starnes, Lawson W.
Abstract:: This paper shows how ten easy-to-use linear skyline thinning production rate equations were obtained by transforming existing but more cumbersome turn time equations using the THIN simulation model [11). The equations provide reasonable approximations of delay-free hourly production for several cable yarders operating skyline thinnings under a variety of conditions....
Resource Type:: Capstone Project

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

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

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 mobility model for tracked vehicles

Creator:: Gleason, Karl H.
Abstract:: A semi-empirical mobility model is presented which predicts tracked vehicle performance in timber harvesting applications. The interactions between the log load and the terrain, the log load and the vehicle, and the vehicle and the terrain cause resistances for the vehicle. The mobility model calculates these resistances, comparing them to...
Resource Type:: Capstone Project

Production rates of skyline, balloon, and helicopter yarding systems from gross time study analysis

Creator:: Curtis, Richard James
Abstract:: This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...
Resource Type:: Capstone Project

Predicting running skyline performance based on the mechanical capability of the yarder

Creator:: Wilbanks, Samuel James
Abstract:: The objective of this paper is to develop a methodology for determining running skyline yarder performance based on the mechanical characteristics of the yarder and its interaction with the load and the terrain. A code for implementing this procedure on the HP-9020 will be prepared .
Resource Type:: Capstone Project

ScholarsArchive@OSU

An economic model of soil compaction in forestry

A simulation of the operation of a log landing for a heli-stat airship in old-growth timber

Predicting skidder productivity : a mobility approach

Skyline thinning production rate equations using the thin simulation model

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

Estimating large woody debris recruitment from adjacent riparian areas

LOGCOST a harvest cost model for southwestern Idaho

A mobility model for tracked vehicles

Production rates of skyline, balloon, and helicopter yarding systems from gross time study analysis

Predicting running skyline performance based on the mechanical capability of the yarder

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