Index Catalog // ScholarsArchive@OSU

The effects of thinning on stand and tree growth in a young, high site Douglas-fir stand in western Oregon

Creator:: Marshall, David D.
Abstract:: The Levels-of-Growing-Stock Studies in Douglas-fir is a regional cooperative to investigate the effects of levels of growing stock on young stand growth. The Hoskins installation, in western Oregon, was established in a dense, high site natural stand at total age 20 years. The initial thinning resulted in an immediate 131...
Resource Type:: Dissertation

The structure of the hardwood plywood industry in the Far East exporting countries : Japan, Republic of China, Republic of Korea, and the Philippines

Creator:: Lee, Gin-fu Larry
Abstract:: The purpose of this study is to provide a systematic method to analyze relationships between inputs, technology, and market structure of an industry, and marketing activities among countries in general and to develop an economic analysis of trade flow of the hardwood plywood industry in the Far East exporting countries:...
Resource Type:: Dissertation

The thermal characteristics of hydrologically intact Type C and E streams in eastern Oregon

Creator:: Hopkins, Karl T.
Abstract:: Many streams in eastern Oregon are listed as water quality impaired on the basis of water temperature. However, it is often difficult to predict water temperature for these streams even if there are no anthropogenic impacts. We measured air and water temperature and stream characteristics on three Type C and...
Resource Type:: Masters Thesis

Nonlinear hydrodynamic response of curved singly-connected cables

Creator:: Chiou, Rueybin
Resource Type:: Dissertation

An analysis of foodgrain market in Korea

Creator:: Mun, Pal-lyong
Abstract:: In order to effectively use foodgrain prices as tools of government policy, it is necessary to know the possible effects of price incentives on different economic variables. The present study attempts to measure the effects of foodgrain prices, upon various economic variables, including production, consumption, both at the farm and...
Resource Type:: Dissertation

Early detection of weed resistance : pattern-thinking and rapid microcalorimetric assay

Creator:: Suwanagul, Duangporn
Abstract:: Weed resistance is usually diagnosed after a weed control practice has lost efficacy and weed populations begin to increase rapidly. Prediction and validation in the field at a very early stage of resistance development is a promising method for preventing an uncontrollable problem. Pattern-thinking helped individuals connect their experience of...
Resource Type:: Dissertation

Enhancement of the weed competitive ability of lowland rice (Oryza sativa L.) cultivars

Creator:: Ranasinghe, Lakshman L.
Abstract:: Most of the presently grown cultivars of rice (Oryza sativa L.) have poor competitive ability against weeds if compared with traditional cultivars. Therefore, effective weed control is an important but often costly and difficult management practice in rice crop production. If weed competitive ability of rice cultivars could be improved...
Resource Type:: Dissertation

Use of ion-exchange and direct osmotic concentration technologies for processing cantaloupe juice

Creator:: Galeb, Abduljalil D. S.
Resource Type:: Dissertation

Predicting the impacts on residential property values from changes in water quality

Creator:: Doverspike, Mark Steven
Abstract:: Eutrophication is the accelerated aging process of a lake which generally decreases the water quality in terms of aesthetic and recreational uses. At Liberty Lake, near Spokane, Washington, eutrophication has become a problem. Many individuals and agencies are interested in the benefits that occur when the lake's water quality has...
Resource Type:: Masters Thesis

A production function analysis of water resource productivity in Pacific Northwest agriculture

Creator:: Holloway, Milton L.
Abstract:: The competition or rivalry for the use of water resources among economic sectors of the Pacific Northwest and among geographical regions of the western United States has intensified in recent years. This rivalry and the long run prospects for water shortages have increased the demand for research concerning the productivity...
Resource Type:: Dissertation

Perinatal and postweaning effects of the interaction between maternal ethanol ingestion and low dietary zinc in the rat

Creator:: Yeh, Lee-chuan C.
Abstract:: This research was designed to study the perinatal and postweaning effects of the interaction between ethanol and low dietary zinc during gestation and lactation in the rat. Pregnant rats were fed liquid diets containing either 2 or 10 μg zinc/ml with or without 30% of kcal from ethanol throughout gestation...
Resource Type:: Dissertation

Ultrafiltration of fruit juice and wine

Creator:: Flores Gaytan, Jose Humberto
Abstract:: The possible effect of oxidation [processing with or without sulfur dioxide (±S0₂)] and of pre-ultrafiltration treatment of juices with enzymes and fining agents on flux, and on juice color, composition and stability was investigated. White Riesling juice was ultrafiltered with a Romicon system operated with a nominal molecular weight cut-off...
Resource Type:: Dissertation

Characteristics of Northern squawfish (Ptychocheilus oregonensis) and feasibility for utilization as human food

Creator:: Lin, Dongdong
Abstract:: The characteristics of Northern squawfish (Ptychocheilus oregonensis) and the feasibility of utilization of this species for human consumption were investigated. In the first experimental phase, the iced storage characteristics of squawfish were determined. Quality changes were monitored over 24 days of storage by chemical, physical, microbiological and sensorial methods of...
Resource Type:: Masters Thesis

Effect of ethanol and low dietary copper on perinatal and postweanling copper utilization in the rat

Creator:: Baek, Jong Ho
Abstract:: The hypotheses of this research were (1) to test if the antagonistic effect of ethanol on liver copper could be seen within a short period when ethanol ingestion, low dietary copper and high metabolic demand represented by either pregnancy plus lactation or rapid growth are simultaneously present and (2) to...
Resource Type:: Dissertation

Effect of callipyge gene on lamb growth, carcass characteristics, and meat quality

Creator:: Srinivasan, Haribaskar
Abstract:: Callipyge (CLPG, n=16) and normal (N, n=11) lambs were produced from Polypay dams and Dorset sires heterozygous for the CLPG gene to study the effects of the gene on growth and carcass and meat quality parameters. CLPG lambs had higher average daily gain than N lambs (0.26 vs 0.23 kg/day,...
Resource Type:: Masters Thesis

Development of performance based test procedures for asphalt mixtures

Creator:: Kliewer, Julie E.
Abstract:: In 1987, Congress authorized a 5 year $150 million dollar research program called the Strategic Highway Research Program (SHRP). SHRP was divided into four major areas, including the asphalt research program. The asphalt research program was divided into six major research contracts, one such contract, SHRP-003A was called Performance Related...
Resource Type:: Dissertation

Soil genesis, classification, and nitrogen cycling in forest ecosystems of the northwestern Rif region of Morocco

Creator:: Ben Jelloun, Hassane
Resource Type:: Dissertation

Using percentile regression for estimating the maximum species richness line

Creator:: Qadir, Mohammad F.
Resource Type:: Dissertation

Salivation and engorgement parameters of sucking insect vectors : implications in pathogen transmission

Creator:: Shieh, Jong-neng
Abstract:: The probing behavior and feeding activity of green peach aphid, Myzus persicae Sulzer, on Bacillus thuringiensis ssp. tenebrionis- transgenic potatoes, insecticide treated potatoes, and host plants with different preference were electronically monitored. I found that first, transgenic potatoes had no effect on green peach aphid probing suggesting that transmission of...
Resource Type:: Dissertation

Assessment of genetic resistance to strawbreaker foot-rot (Pseudocercosporella Herpotrichoides) in selected winter wheat (Triticum aestivum L.) cultivars

Creator:: Encinas-Mungarro, Andres
Abstract:: Strawbreaker foot-rot is a major limiting factor to cost efficient winter wheat production in the Pacific Northwest. Development of resistant cultivars has been hindered by the lack of adequate levels of genetic resistance and screening techniques which can consistently detect desired genotypes. Studies were conducted to determine if the reported...
Resource Type:: Dissertation

Evaluation of responses of sows and their litters to feeding patterns

Creator:: Kwansa, Wilhelmina
Resource Type:: Dissertation

Processing of laser interferometric signals for small displacement measurements

Creator:: Peng, Gwo-sheng
Abstract:: Algorithms for analyzing laser interferometry signals were developed and adopted to the computer based processing of small displacement measurements. These methods, matrix operation approach and fixed parameters approach, are based on signal phase calculation and are able to replace complex fringe counting electronic circuits. The matrix operation provides an approach...
Resource Type:: Dissertation

Duration and rate of grain filling and subsequent grain protein content in selected winter wheat populations

Creator:: Mou, Beiquan
Abstract:: The lack of information regarding the inheritance of the duration and rate of grain filling, and the possible relationship between grain fill and grain protein content in wheat prompted this study. Early maturing Chinese cultivars, 'AI Feng 2' and 'CB 83-52', and late maturing cultivars adapted to Oregon, 'Stephens' and...
Resource Type:: Dissertation

Geostatistical applications to salinity mapping and simulated reclamation

Creator:: Al-Taher, Mohamad A.
Abstract:: Geostatistical methods were used to find efficient and accurate means for salinity assessment using regionalized random variables and limited sampling. The random variables selected, sodium absorption ratio (SAR), electrical conductivity (EC), and clay content were measured on samples taken over an area of fifteen square miles. Ordinary kriging and co-kriging...
Resource Type:: Dissertation

Inheritance of durable type disease resistance to leaf rust in wheat (Triticum aestivum L.em Thell)

Creator:: Das, Modan Kumar
Resource Type:: Dissertation

Estimates of genetic variability resulting from single, top, and double cross populations in durum wheat (Triticum turgidum L. var. durum)

Creator:: Abdennadher, Mourad
Abstract:: The success of a plant breeding program depends upon the availability of useable genetic diversity. Such diversity may be enhanced depending on the type of hybridization strategy employed. Segregating progenies resulting from F2 populations, a double cross, and a top cross were compared for the amount of useable genetic diversity...
Resource Type:: Masters Thesis

Assessment of drainwater evaporation ponds as waterfowl habitat in the San Joaquin Valley, California

Creator:: Euliss, Ned H.
Resource Type:: Dissertation

A model for understanding the influence of selective and nonselective harvest on fish populations

Creator:: Hirai, Takayuki
Abstract:: To understand the influence of selective harvesting on the adaptive capacity of fish populations in changing environments, a computer simulation model was developed. In the model, hypothetical populations were composed of five different life histories, which were genetically determined. Each life history type had its own rate of survival and...
Resource Type:: Masters Thesis

Factors affecting semen quality and their effects on the fertilizing ability of broiler breeder spermatozoa using a fluorometric assay

Creator:: Bootwalla, Salim Mohsin
Abstract:: Three distinct studies using an ethidium bromidedigitonin fluorometric assay were conducted to determine if the fertilizing ability of individually caged broiler breeder males (BBM) could be enchanced by nutrition, breeding and semen extender viscosity. The first study evaluated the effects on the spermatozoal quality of BBM by feeding corn-soybean meal...
Resource Type:: Dissertation

Influence of leaf types on canopy architecture and grain yield in selected crosses of spring wheat Triticum aestivum L.

Creator:: Vanavichit, Apichart
Abstract:: The effects of erect leaf canopies on enhancing grain yield in wheat is not understood. The main objective of this study was to understand the effect of leaf angle on grain yield by comparing randomly derived-lines from crosses of erect and droopy leaf spring wheats. Nine traits associated with canopy...
Resource Type:: Dissertation

The effect of interval weight training on dynamic muscular strength, power, and cardiorespiratory function in male college students

Creator:: Jun, Tae Won
Resource Type:: Dissertation

Selected effects of a computer game on achievement, attitude, and graphing ability in secondary school algebra

Creator:: Marty, James Frank
Abstract:: The hypotheses of this study stated the following: Interaction with the computer game will significantly increase the class means in: (1) mathematical achievement, (2) attitudes toward mathematics, and (3) graphing ability in high school advanced algebra. ALGEBRA ARCADE is a computerized simulation game played on a coordinate grid. One can...
Resource Type:: Dissertation

Evaluation of combining ability in mosquitofish

Creator:: Pongthana, Nuanmanee
Abstract:: Two replications of a half dial lei cross experiment were performed among four inbred lines of mosquitofish, Gambusia affinis. These inbred lines originated from three random-bred stocks: OR, TX and CD. The experiment was conducted as a completely randomized design. Experimental material consisted of parental lines and F₁ populations maintained...
Resource Type:: Masters Thesis

Performance evaluation and design of multiple time series based forecasting systems

Creator:: Chen, Kuei-Lin
Abstract:: The study evaluates performances of three multiple time series (MTS) forecasting methods; investigates possible improvements in MTS forecasting operations, and proposes a multiple time series based forecasting system. Time series considered are finite, linear, covariance stationary, and discrete. Specific objectives for the thesis were: (a) conducting comparative studies of MTS...
Resource Type:: Dissertation

A study of unique teacher education competencies needed by vocational education teachers to work with secondary handicapped students

Creator:: Kononen, James Wilmer
Resource Type:: Dissertation

A production function analysis of water resource productivity in Pacific Northwest agriculture

Creator:: Holloway, Milton L.
Abstract:: The competition or rivalry for the use of water resources among economic sectors of the Pacific Northwest and among geographical regions of the western United States has intensified in recent years. This rivalry and the long run prospects for water shortages have increased the demand for research concerning the productivity...
Resource Type:: Dissertation

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