Physical Sciences and Mathematics Commons^™

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 …

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 …

Geochemical And Biogeochemical Studies In The Hansonburg Mining District, New Mexico, Alan Nathan Silverman

Masters Theses

"The Hansonburg mining district is in Socorro county in south central New Mexico. A Paleozoic section of thick Pennsylvanian limestone units, thin shale and arkose layers and thick Permian units of sandstone, siltstone and gypsiferous beds interlayered with thin limestone units unconformably overlie a Precambrian basement of granite. The sedimentary rocks are folded with north trends and plunges. Northerly, some easterly and northwesterly trending faults cut the folds. Galena, fluorite, and barite mineralization occurs along some of the northerly faults and as bedded replacements and fissure fillings in the Pennsylvanian Council Spring limestone.

Geological mapping and geochemical soil surveys of …

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.

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 …

A Geochemical And Microscopic Study Of A Recently Discovered Deposit In Southern Illinois Fluorspar District., Prachon Chareonsri

Masters Theses

"A bedding-replacement fluorite deposit, discovered by recent drilling in the northeast part of the Cave in Rock district, southern Illinois, has been studied by a combination of geochemical, X-ray, and microscopic techniques. The dispersion pattern for trace zinc, lead, cadmium and copper concentrations in carbonate host rocks adjacent to the fluorspar deposit, determined by atomic absorption spectrophotometry, appears to hold only little hope in serving as an aid to exploration. Only cadmium anomalies appear closely related to the known fluorspar ore, and those values are not greatly above background.

Broad zinc and cadmium anomalies and a narrow lead anomaly are …

A Comparison Between Direct Waves And Head Waves In A Seismic Refraction Profile., Nelson Jose Aboud Garcia

Masters Theses

"The purpose of this investigation was to experimentally verify the theoretical prediction that the particle velocity of a head wave is the time integral of the particle velocity of a direct wave.

The procedure was to use small explosions in the field to generate direct waves and head waves in a surface layer of low compressional velocity overlying a higher velocity medium. The direct waves were distinguished by the ratio of frequencies and by the slopes in a time distance plot.

The result of comparing the particle velocity of the head waves with the integral of the particle velocity of …

A Study Of Several Substitution Ciphers Using Mathematical Models., Wanda Louise Garner

Masters Theses

"This paper will consider vector and matrix representations for several polyalphabetical substitution ciphers. Classical ciphers such as the Vigenère, the True Beaufort, the Variant Beaufort, and the autokey will be included. We shall also discuss ways to mathematically vary a substitution cipher. In addition, we shall employ our mathematical representations to decipher a fixed matrix substitution cipher"--Abstract, p. ii

Mechanistic Studies Of Alkylation Of Cobalt(I) By Cyclobutyl Derivatives, Hao Ku

Masters Theses

A study was initiated on the hypothesis, by Ugi and co-workers, that cyclopropyl, cyclobutyl, and cyclopentyl electrophiles might under go nucleophilic substitution reactions with retention of configuration.

The synthesis of benzocyclobutenol and 2-phenylcyclobutyl tosylate is described. The reactions of these tosylates with cobalt(I) "supernucleophiles" gave low yields of products which have not been purified sufficiently for assignment of stereochemistry.

Reaction of cyclopentyl tosylate and phenylethyl tosylate with the "supernucleophiles" cobaloxime(I) and cobalt(salen)(I) is discussed for the advance of future work.

The Intramolecular Torsional Potential And Dielectric Properties Of 2,3-Butanedione, Gevert H. Meyer

Masters Theses

Dipole moment measurements have been carried out on 2,3-butanedione in solution, pure liquid, and the vapor phase. A dipole moment of 1.03 ± .01 Debye was observed for dilute solutions of 2,3-butanedione in carbon tetrachloride. Pure liquid samples exhibit an anomalous dipole of 1.56 ± .01 Debye. The following results were obtained for vapor phase measurements: 1.04, 1.07, 1.08, 1.11, and 1.17 ± .01 Debye at 310.15, 350.15, 370.15, 431.70 and 472.10 ± .02°K respectively.

The acetyl torsional potential was characterized from the observed temperature dependence of dipole moment. This torsional mode was described by a two-parameter potential function: V(Ø) …

Mechanistic Studies Of Alkylation Of Cobalt(I) By Cyclopropyl Derivatives, Lailing Magdalene Soong

Masters Theses

A second order nucleophilic substitution reaction with retention of configuration is predicted by Ugi and co-workers if electrophiles such as cyclopropyl, cyclobutyl, or cyclopentyl derivatives undergo substitution under conditions where the S_N2 process is faster than the competing S_N1 process.

A synthesis of both cis and trans-7-chlorobicyclo [4.1.0] heptane from olefin and dichlorocarbene is described. The compound, bicyclo [4.1.0] heptylpyridine [bis(salicylaldehyde)ethylenediiminato] cobalt(III), which contains an alkylcobalt σ-bond, is obtained from the reaction of pyridine [bis(salicylaldehyde)ethylenediiminato] cobalt(I) and 7-chlorobicyclo [4.1.0] heptane. The great light sensitivity of this compound has prevented its isolation in purity sufficient for nmr …

Studies Of Acetylcholinesterase In Synaptosomes, Syed Abbas Rizvi

Masters Theses

Acetylcholinesterase from rat brain was studied in crude homogenates, partially purified enzyme fractions, and in synaptosomes, to observe modification of the enzyme as a consequence of the modification of the membrane containing it.

Sodium dodecyl sulfate decreases the absorbance due to particles in the homogenate. This change in absorbance was proportional to both the concentration of sodium dodecyl sulfate and the concentration of the particles. Further, sodium dodecyl sulfate caused sulfhydryl groups to appear in the crude homogenate and in partially purified enzyme fractions. Synaptosomal preparations did not give such results. At concentrations of sodium dodecyl sulfate sufficient to cause …

Zwitterionic Carbonyl Halide Complexes Of Tungsten, Dragoslav Marcovich

Masters Theses

The first carbonyl halide zwitterionic complexes have been synthesized and are of the type cis- (OC)₄XWPPh₂(CH₂)nPPh₂R in which X is Cl, Br, or I, n is 1 or 2, and R is an alkyl group. The complexes were prepared by the reaction […]. The temperature of the reaction must be carefully controlled since the decomposition point of the product is only 10°C higher than that of the reactant.

The zwitterionic complexes are sensitive to light in solution but are insensitive to light in the solid state. Unlike carbonyl halide complexes of the …

A Study Of The Effects Of Numerical Error Propagated Through Several Independent Stages: An Electron Optics Simulation., William Donald Webster

Masters Theses

"Presented is a study, combining numerical methods in a series of stages whereby each stage provides input data to its successor. A model problem from electron optics ii is studied in which a potential field is computed, gradient vectors calculated, and trajectory equations solved. Error effects in each stage is assessed for its influence on the final results of the numerical process mimicking the model problem. Error analysis is given in Appendix A. Finally, the superiority of Spline approximations for estimating derivatives is demonstrated"-- Abstract, p. ii

Reflected Surface Waves From A Vertical Discontinuity., Jesus Manuel Aboud

Masters Theses

"Surface waves generated in the field by small explosions were observed along lines parallel and perpendicular to a vertical discontinuity in a surface layer. Three types of wave particle motion were observed in waves incident on the discontinuity: retrograde, progressive, and shear (SH). Waves of the last two types were intense enough to observe a reflection, permitting calculation of reflection coefficients. The results demonstrate the feasibility of using reflection measurements to locate a discontinuity such as a fault zone"-- Abstract, p. ii

Distribution-Free Interval Estimation Of The Largest Α-Quantile, William E. Plouff

Masters Theses

No abstract provided.

Geology Of Klump's Cave, Perry County, Missouri, Ernest L. Kern

Masters Theses

No abstract provided.

Spin-Flip In 12C (P,P') 12C Near The 9.14 Mev Doublet, John Ambani Muhanji

Masters Theses

No abstract provided.

The Effect Of Sheet Moisture On The Anisotropy Of Paper Subjected To Various Degrees Of Restraint During Drying, Ivan T. Mascarenhas

Masters Theses

No abstract provided.

Noise Pollution A Study In Kalamazoo, Michigan, William Thomas Williams

Masters Theses

No abstract provided.

The Extended Tukey Procedure Compared To The Scheffe And Bonferroni Procedures, Wilber B. Emmert

Masters Theses

No abstract provided.

The Sediments And Sedimentary Environments Of A Barrier Island, Cedar Island, Virginia, John Walter Heinsius

Masters Theses

No abstract provided.

Measurement Of Neutron Differential Cross Sections Using The Associated Particle Method, Gary Eugene Rochau

Masters Theses

No abstract provided.

Geology Of The Sweetwater Canyon Area And Origin Of Interbasinal Canyons, Southwestern Montana, James Carl Peterson

Masters Theses

No abstract provided.

The Effects Of Sodium Chloride On Hyalella Azteca, Ameletus Sparsatus, And Tubifex Tubifex, Stephen A. Miller

Masters Theses

No abstract provided.

An Investigation Of Photographic Phase Holograms, Dale Lance Markham

Masters Theses

No abstract provided.