Digital Commons Network^™

Effects Of A Multiple Baseline Design On Maintenance Of Treatment Effects Across Time, Bernard D. Fabry

Masters Theses

No abstract provided.

Kinetics Of The Thermal Decomposition Of Pyridine, Tesfaye Biftu

Masters Theses

No abstract provided.

A Follow-Up Study Of The Kalamazoo Learning Village, Margarita Camacho

Masters Theses

No abstract provided.

The Status Of The Dominant Cognitive And Operant Theories Of Motivation In Industrial Psychology, Walter M. Baker

Masters Theses

No abstract provided.

Synthesis And Analysis Of Dimers Of Alpha-Methylstyrene, Bhadreshkumar J. Mehta

Masters Theses

Introduction

The heat of polymerization ∆Hp, of Alpha-methylstyrene (AMS) has been a source of study for many years. The structure of AMS is shown in Figure 1.

Roberts and Jessup carried out the first quantitative work to determine ∆Hp if AMS.¹ Their data displayed a ∆Hp dependence on the degree of polymerization, DP. Several other reports were also published with new values for ∆Hp and new explanations for the apparent DP dependence.^{2, 3, 4, 5.}

Samples of dimers of AMS have been prepared by various workers.^{6, 7, 8} The reactions were mostly carried out by using sulfuric …

Conditionability Of Successively Presented Compound Stimulus Elements In A Conditioned Suppression Procedure, As A Function Of Prior Conditioning To One Of The Compound Elements, Michael Jay Schoenfeld

Masters Theses

No abstract provided.

Dr. Francis W. Schofield And Korea, Doretha E. Mortimore

Masters Theses

No abstract provided.

The Effects Of Perceived Parental Evaluations On Skills Development In Mathematics, Donna M. Kaminski

Masters Theses

No abstract provided.

Some Pegmatites Near Gwinn, Michigan, Michael J. Moss

Masters Theses

No abstract provided.

Estimation Of Vehicle Transfer Functions., Leonard Francis Laskowski Iii

Masters Theses

"This study is an investigation of several techniques used to estimate lateral control models for vehicles. The lateral control model that was identified related steering wheel angle input to lateral acceleration output. Two different order models were identified, one a biquadratic and the other a fourth order lowpass system with second order numerator dynamics. The two main approaches investigated were:

1) Regression analysis

2) Fast Fourier Transform Techniques These techniques were chosen because of their inherent immunity to noise.

A CSMP simulation of all identified models was then made to determine their validity. These checks were made using laboratory data …

"Project Dial": An Early Childhood Screening Program, Lewis S. Sarff

Masters Theses

This field study addressed the problem of "actively seeking" out and identifying children (ages 3 to 5 years) likely to develop late learning problems upon school enrollment. The procedures developed and reported in this paper deal with initial public relations, facilities, personnel, an evaluation instrument Developmental Indicators for the Assessment of Learning (DIAL), hearing and vision testing, and reporting of results to parents and school personnel.

The paper also includes means and standard deviations for DIAL subtest scores by one year age groups and by sex, as well as simple and multiple r's for each of the DIAL variables individually …

Reactions Of Tungsten Carbonyl Complexes Containing Diphenylvinylphosphine, George S. Leotsakos

Masters Theses

A new synthetic route for the production of the tungsten carbonyl complex (OC)₅WPPh₂CH₂CH₂PPh₂ has been discovered. It has been found that lithiumdiphenylphosphide reacts with diphenylvinylphosphinepentacarbonyltungsten(0) in tetrahydrofuran to produce upon hydrolysis a good yield of the pentacarbonyl product […]. No evidence for the formation of secondary products was noted nor was there evidence for preferential attack of the carbonyl group by LiPPh₂ to form a carbene complex.

Diphenylvinylphosphinepentacarbonyltungsten(0) (mp 62-64°C), was prepared for the first time by two different methods.

I. Displacement of aniline from anilinepentacarbonyltungsten(0) complex with diphenylvinylphosphine.

II. …

A Statistical Approach To The Study Of The Ecosystems Of Seven Ponds In East-Central Illinois, Gregory Lee Orr

Masters Theses

Gross primary productivity, heterotrophic bacterial numbers, and net phytoplankton densities of seven ponds in Coles County, Illinois, were studied in relation to physical, chemical, and biological habitat variables (light intensity and duration, turbidity, water temperature, pH, dissolved oxygen, sulfur, nitrogen, phosphorus, production, bacteria, and phytoplankton). Ten observations were made for each pond (except where otherwise noted) from 17 June through 25 August 1974. Stepwise multiple linear regression analyses of the data were used in order to determine those environmental factors which were important in predicting (i.e., significantly correlated with) bacterial and phytoplankton densities, and production. A multiple linear regression equation …

Some Relationships In The Water Quality And Life Forms Of Field Tile Effluents And Downstream Water, Joseph C. Sidwell

Masters Theses

No abstract provided.

Comparative Studies Of The Computational Analysis Of One Dimensional Gas Flow, Johnny Ziebarth

Masters Theses

No abstract provided.

Pesticide Residues In The Illinois Wild Turkey, John M. Bridges

Masters Theses

Adipose tissue from 55 turkeys, killed during the 1974 hunting season in southern Illinois, was grouped by age and location of the birds, and the pesticide concentrations in them were determined by gas/liquid chromatography. Twelve different pesticides were identified in the samples with only four, total DDT, heptachlor epoxide, toxaphene, and linuron, being present in all samples. Concentrations ranged from 0.02 ppm to 0.88 ppm.

An Intercorrelation Analysis Of The Itpa And Feature Finders, Debra Betts Bork

Masters Theses

No abstract provided by author.

The Development Of A Selection Model For Coal Conversion Processes., Karen Aldridge Dollar

Masters Theses

"Present research endeavors involving coal conversion technology have encompassed comparisons of the processes on the basis of economics or efficiency. These comparisons lack completeness because many intangible factors pertinent to the evaluations of the processes have been ignored.

A model has been developed to aid in the selection of the optimum coal conversion process for a given situation. The model includes a method for the evaluation of quantifiable factors which affect the decision-making procedure, and also includes methods by which the non-quantifiable factors which are important to the situation may be evaluated. This is a more complete form of decision-making …

Investigation Of A Modulation Method And Signal Processing Techniques For Digital Data Transmission In Hf Channels., Michael Ray Campbell

Masters Theses

"This thesis presents a method of improving the performance of digital communication systems operating in environments typical of the high-frequency (HF) band. The HF channel is a compound error event channel in that it contains random errors due to additive white Gaussian noise (AWGN) plus burst-type errors due to effects such as impulse noise and tone interference. A method of signal design using the time-frequency plane is utilized. This facilitates design of signal sets that may be blanked in time and frequency, thus reducing the effects of the nonGaussian interference. Several signal designs are presented and compared in t􀁗rms of …

A Unit Hydrograph For The Missouri Ozark Region., Melvin G. Schaefer

Masters Theses

"Eleven small watersheds from the Missouri Ozark region are used in generating a synthetic unit hydrograph. The analysis is composed of three parts: First, a prediction equation is developed which correlates the time lag parameter with the physical features of the watershed. Second, an equation is developed which predicts the peak flow ordinate for 30-, 60- and 120-minute unit hydrographs. Third, an average dimensionless unit hydrograph is determined"-- Abstract, p. iii

An Experimental Study Of Mass Transfer To Droplets In Aqueous Polymer Solutions., Richard Gerard Schafermeyer

Masters Theses

"Instantaneous and time-average mass transfer coefficients for 1 the free-fall period was obtained for transfer of iodine from nonNewtonian continuous phases to carbon tetrachloride drops. The nonNewtonian continuous phases were aqueous solutions of carboxymethyl cellulose and carboxy polymethylene. Although a few exceptions were found, the continuous phase mass transfer coefficients were, in general, found to decrease with increasing time of drop contact. Comparisons of the experimental data to theoretical relations showed that changes in drop internal circulation probably occurred for that data which showed a time effect for the mass transfer coefficient. Several explanations for the time effect were offered, …

An Optimization Method For Scheduling Nuclear Reactor's Refueling St. Louis County, Missouri., Abbas Razavi

Masters Theses

"This paper describes a method to optimize the refueling schedule of the nuclear units. The method finds a mid-range (five to ten years) optimum refueling schedule by varying the refueling date of the nuclear units. The cycles of the nuclear units are the variable parameters, with fuel enrichment and quantity being fixed.

An empirical technique is used to calculate the nuclear fuel cost. Seasonal constraints are taken into account, and no nuclear unit will be shut down while another is down"-- Abstract, p. ii

Decoupled Explosive Charge Effects On Blasting Performance, Roberto Ucar

Masters Theses

"This investigation was performed to determine the burden at which hard rock would break utilizing decoupled and unstemmed charges when the free surface parallel to the borehole was the wall of an open hole. This open hole was created by burn cuts and by drilling holes of 7-7/8 in. and 12 in. diameter. Additional tests were performed using partially stemmed charges where the stemming was the same size as the explosive charge.

The explosive used was a 0.75 lb. slurry charge, 1.5 in. diameter and 10 in. long. The diameter and depth of the borehole were 2 in. and …

A Study Of Stability Of Ac And Dc Transmission Lines Operated In Parallel., Tzyy-Cheng Wang

Masters Theses

"This thesis is concerned with the analysis, optimization and simulation of parallel operation of ac and de transmission lines.

An introduction and literature review are provided to give background information on how the parallel operation should be considered. The parallel system is analyzed, and the state equation is derived for determining the stability limit. The optimization of the control law U = Fx is determined by a standard quadratic cost function. Prefault, during fault and postfault situations in the parallel operation has been simulated by Continuous System Modeling program. Some comparison and comments are made between 1 ac, 1 de …

Computer Simulation Of Radiation Effects In Fe₃Al By Using Alternating Direction Implicit Numerical Techniques., Dean Lewis Tibbitts

Masters Theses

"An analysis was conducted to see if the alternating direction implicit (a.d.i.) numerical technique could be applied to a many-body dynamical radiation damage model.

The computer program which resulted was named ADI. It was numerically stable for small time steps used in conjunction with low ev knock-ens. It was also able to relax the a toms in the system simultaneously in the implicit direction. However, an existing explicit computer code, which was to be replaced by ADI, proved to be more numerically stable and about 40% faster"-- Abstract, p. ii

Documentation Of A Short Circuit Program For Fault And Protection Studies., Alejandro Gonzales

Masters Theses

"For a given power system of no more than 100 buses and 400 line ends (source lines have one line end, radial lines have one line end and regular lines have two) a digital computer program is presented which determines the short circuit currents needed to implement a protective relaying design, The program uses the ZBUS method of analysis and calculates the currents at all buses, searches for the maximum and minimum values of the current contributed by the lines connected to the faulted bus under normal conditions (all lines in) and under single and double line outages. Maximum and …

Computational Models Of Learning., Kenneth Jesse Marse

Masters Theses

"An investigation is made into the use of techniques which would normally be described as learning if encountered in a human being. A literature review of several subject areas including game-playing computer programs, automatic control systems, pattern recognition methods, and biological modeling is performed, with the purpose of extracting and examining those processes which exhibit learning. A general model of the type of learning most widely utilized in these areas is constructed and used to compare and contrast specific models which describe the learning techniques employed. Some specific models which do not exhibit learning as described by the general model …

Heavy Metal Contamination In Soil Around A Lead Smelter In Southeast Missouri, David Lewis Butherus

Masters Theses

"In order to determine the extent of possible heavy metal contamination, more than 963 samples of leaf litter and soil were collected from 410 sample stations around the AMAX smelter in southeast Missouri. Dried samples of leaf litter and minus 80 mesh soil fractions were analyzed for cadmium, copper, lead, and zinc by atomic absorption spectrophotometry. Minus 80 mesh soil fractions were also analyzed for sulfur using x-ray fluorescence methods. Ranges of heavy metal concentrations in leaf litter were: cadmium, 0.13 μg/g to 175 μg/g; copper, 4.2 μg/g to 6500 μg/g; lead, 50 μg/g to 130,000 μg/g; and zinc, 26 …

An Analysis Of A Network Of Finite-Queue, Multiple-Server Facilities., Juanita Kaye Shukers Grau

Masters Theses

"An algorithm for listing all possible steady states and for generating the transition matrix for a series of finite-queue, multiple-server facilities is described. This algorithm is compared to a previously developed one. The new algorithm is better since it works for multiple servers and does not require an extra pseudo-facility. Using the list of states and the matrix generated by the new algorithm, exact steady state probabilities can be calculated. Then the probabilities can be used to obtain system statistics which cannot be calculated otherwise"-- Abstract, p. ii

Fluid Inclusion Geothermometry Of Tri-State Sphalerite, Chi-Sheng Wei

Masters Theses

"Fluid inclusions in successively deposited generations of sphalerite from the Tri-State district have been examined for geothermometry as a function of time. The main stage of vug-filling sphalerite has been studied most intensively and as many as 83 fluid inclusions have been examined in a single crystal. These sphalerite crystals are commonly zoned, and their filling temperatures exhibit a general pattern of declining temperature from their cores outward, from about 135°C down to 90°C. The decline is not a steady one, but rather it is characterized by fluctuations commonly about 15-20°C. Some fluctuations have magnitudes as great as 50-60°C, with …