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A study of the coefficient of drag resistance in yarding logs

Creator:: Henshaw, John Robinson
Abstract:: This study was conducted to examine the coefficient of drag resistance (µ) between a log and bare forest soil during partial suspension yarding. Drag resistance in this study was defined as the resistance due to friction between the soil and the log plus the resistance due to the plowing action...
Resource Type:: Masters Thesis

Prebunching with a low investment skyline yarder in thinnings

Creator:: Keller, Robert Richard
Abstract:: This study compares the production rates and yarding costs of prebunching with a low investment skyline yarder and swinging with a larger skyline yarder to full-cycle thinning with the larger yarder The study analyzes two slackpulling techniques (manual and haulback assisted) and two carriages (a multi-span carriage and a clamping...
Resource Type:: Masters Thesis
Full Text:: WITH A LOW INVESTMENT SKYLINE YARDER IN THINNINGS Abstract approved: D. Edward Aulerich This study

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

Simulating skyline yarding in thinning young forests

Creator:: Sinner, Hans-Ulrich
Abstract:: Cable logging systems are being applied frequently in thinning young-growth forests, but the dynamics of these systems are relatively unknown. This study is part of a research project to develop aerial logging systems for thinning and to analyze them for economic, silvicultural, and environmental implications. The objectives of my study...
Resource Type:: Masters Thesis

A case study of the influence of log deck configurations on loading with a self-loading log truck

Creator:: Clark, Cedric J.
Abstract:: Intensive forest management requires efficient logging techniques to remain economical. Commercial thinnings and shorter rotations increase piece count inversely to piece size. Continued research aimed toward effective log handling processes is essential. The purpose of this study was to evaluate one case of a self-loading log truck (integral loader and...
Resource Type:: Capstone Project

An examination of inverse sequential (serial) learning as a method of skill training in industry : a human factors engineering approach

Creator:: Conatser, Berns Burl
Abstract:: The necessity for the evaluation of training methods on a between methods basis is suggested. Current methods of training evaluations are considered, and found to be generally deficient for their lack of between technique comparisons. The necessity for an outline of planned comparative analysis of training methods is indicated and...
Resource Type:: Masters Thesis
Full Text:: : A HUMAN FACTORS ENGINEERING APPROACH Abstract approved: Redacted for Privacy br. Edward D. McDowell

The development of a methodology to study the effects of process dynamics and costs on operator behavior

Creator:: Saedi, Mohammad Vahid
Abstract:: A computer simulation was developed as a technique for studying the effects of the process dynamics on the operator's sampling and control behavior. This methodology was used to study the effects of the process input memory variation in the presence of different observation noise levels. It was concluded that the...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for Privacy Dr. Edward D. McDowell A computer simulation was developed as a technique

An investigation of the effects of information displays on human forecasting performance

Creator:: Tirakitti, Sunthorn
Abstract:: With increasing frequency man is required to operate as a controller of complex processes. Although his ability to operate quickly varying processes has been extensively studied, his ability to control slowly varying processes has been largely neglected. Often his performance in such tasks is dependent upon his ability to forecast...
Resource Type:: Masters Thesis
Full Text:: . Edward D. McDowell Abstract approved: With increasing frequency man is required to operate as a

A Bayesian model for the determination of optimal sampling intervals

Creator:: Paradis, Garry Lynn
Abstract:: There are a nearly unlimited number of situations in which the status of time-varying processes must be updated. The monitoring of these processes usually occurs at periodic intervals. Whether the monitoring is performed by man or machine, a decision must be made regarding the frequency of these activities, that is,...
Resource Type:: Masters Thesis
Full Text:: SAMPLING INTERVALS 71 n n A _ Abstract approved: Redacted for Privacy Dr. Edward D. McDowell There are a

The effect of job interruptions on human learning

Creator:: Al-haboubi, Muhammad H.
Abstract:: It is a widely accepted premise of industrial management that an interruption in the performance of a task will be accompanied by a decrease in operator skill level upon resuming performance of the task. Moreover, it has been generally assumed that this loss of skill is related to several factors...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for Privacy 'Dr. EdwaH D. McDowell It is a widely accepted premise of industrial

ScholarsArchive@OSU

A study of the coefficient of drag resistance in yarding logs

Prebunching with a low investment skyline yarder in thinnings

Simulation of a helicopter yarding system in old growth forest stands

Simulating skyline yarding in thinning young forests

A case study of the influence of log deck configurations on loading with a self-loading log truck

An examination of inverse sequential (serial) learning as a method of skill training in industry : a human factors engineering approach

The development of a methodology to study the effects of process dynamics and costs on operator behavior

An investigation of the effects of information displays on human forecasting performance

A Bayesian model for the determination of optimal sampling intervals

The effect of job interruptions on human learning

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