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Articles 2611 - 2640 of 4910
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The Effects Of Urbanization On A Portion Of The Portage Creek Watershed: A Case Study On Surface Water And Groundwater Quality, Susan E. Rezek
The Effects Of Urbanization On A Portion Of The Portage Creek Watershed: A Case Study On Surface Water And Groundwater Quality, Susan E. Rezek
Masters Theses
The surface water and groundwater quality in the study area of the Portage Creek watershed was analyzed to determine the possible effects of urbanization. Dry weather and wet weather surface water and groundwater samples were collected from June 1986 to November 1986 at selected stations in the watershed.
Water samples were analyzed for 26 inorganic and organic parameters. Most concentrations were below analytic method detection limits. The analytical data indicate that sodium and chloride are the principal contaminants resulting from urbanization. The probable source of the contamination is deicing salt applied to the City of Portage, Michigan streets.
Overall, the …
An Analysis Of Dissolved Organic Compounds And Their Contribution To Iron Complexation In The Shallow Leachate Plume Of The West Kl Landfill Kalamazoo, Michigan, Eric Fahle
Masters Theses
High concentrations of dissolved iron are present in downgradient groundwater samples adjacent to the western border of the West KL Landfill. Analysis by Rudder (1988) of groundwater samples indicates oversaturation of selected iron oxides, iron sulfides and siderite in monitoring wells TW-4 and M3.
Previous research suggests that pyrogallol, gallic acid, tannic acid and similar organic compounds may retard the oxidation of ferrous iron in the shallow leachate plume of the West KL landfill (Rudder, 1988). Present research utilizing solid phase extraction, reverse phase high performance chromatography, Fourier transform IR spectrophotometry, UV/Visible spectrophotometry, and gas chromatography/mass spectroscopy indicate that pyrogallol, …
Sedimentological, Structural, And Organic Geochemical Controls On Natural Gas Occurrence In The Antrim Formation In Otsego County, Michigan, Timothy M. Dellapenna
Sedimentological, Structural, And Organic Geochemical Controls On Natural Gas Occurrence In The Antrim Formation In Otsego County, Michigan, Timothy M. Dellapenna
Masters Theses
The prolific Antrim Formation natural gas reservoir in Otsego County, Michigan, has been examined using core descriptions, X-ray diffraction, petrographic, and geochemical analyses. New stratigraphy nomenclature is proposed for the Antrim and Ellsworth Shales. The Antrim Shale contains two distinctive lithofacies: (1) a fractured, non-bioturbated, silica-rich, organicrich black shale lithofacies; and (2) sparsely fractured, bioturbated, carbonaterich, organic-poor gray-green shale. Gas production comes from the Black shale facies.
Rock-Eval analysis demonstrates that the organic matter is a mixture of types I and II material. Low Tmax (435°C) and vitrinite reflectance (0.41-0.46%) values indicate a submature thermal maturation level. Del 13 carbon …
Flotation Data Sampling Strategies In Archaeological Research: An Experiment At The Elam Site (20ae195), Allegan County, Michigan, Brian David Deroo
Flotation Data Sampling Strategies In Archaeological Research: An Experiment At The Elam Site (20ae195), Allegan County, Michigan, Brian David Deroo
Masters Theses
Studies of prehistoric Native American subsistence patterns have benefited greatly from data recovered through the technique of flotation, which allows investigators to recover small scale organic remains which would otherwise be missed using standard excavation procedures. Using data recovered through flotation researchers have been able to more fairly evaluate the role of plant foods, both wild and cultivated, in the aboriginal diet.
A common method of obtaining a flotation sample is to define a column through the center of the cultural feature or midden and removing a specified volume of soil matrix (usually 10 liters) from this column. This thesis …
Diagenesis In The St. Peter Sandstone, Michigan Basin, Carl E. Lundgren
Diagenesis In The St. Peter Sandstone, Michigan Basin, Carl E. Lundgren
Masters Theses
The petrographic evolution of authigenic minerals in the St. Peter formation consists of: early marine cement, syndepositional dolomite, quartz overgrowth cement, pervasive dolomite replacement of precursor carbonate, dissolution of framework grains and carbonate cements, and late formation of authigenic chlorite and illite.
Variations in the diagenetic sequence were templated by variations in primary mineralogy related to depositional facies. Early intergranular carbonate cement, common in shelf facies, precluded early quartz cementation. Subsequent dissolution of dolomite and detrital grains may be temporally and chemically related to the precipitation of authigenic clay in dissolution pores. In peritidal facies, pervasive quartz cementation was locally …
The Paleoethnobotany Of Schwerdt (20ae127): An Early Fifteenth Century Encampment In The Lower Kalamazoo River Valley, Gregory R. Walz
The Paleoethnobotany Of Schwerdt (20ae127): An Early Fifteenth Century Encampment In The Lower Kalamazoo River Valley, Gregory R. Walz
Masters Theses
Carbonized macrobotanical remains from the Schwerdt Site, an Upper Mississippian sturgeon fishery in the Lower Kalamazoo River Valley are identified and analyzed in terms of their implications for localized subsistence-settlement systems operating during the Berrien Phase in southwestern Michigan. The exploitation of wild plant foods at this limited-activity, spring sturgeon fishery and the environmental composition of the site environs are reconstructed from their representation in flotation samples derived from excavated feature and midden contexts.
Botanical data indicate a strong wetland-aquatic orientation in plant procurement, with aquatic tubers being the primary plant resource exploited at the site. Data from several sites …
A Regional Study Of Ground-Water Quality In Barry County, Michigan, Margene K. Brewer
A Regional Study Of Ground-Water Quality In Barry County, Michigan, Margene K. Brewer
Masters Theses
A regional study of ground-water quality in Barry County, Michigan was conducted using a computerized database from the Science for Citizens Center at Western Michigan University in Kalamazoo, Michigan. The database, initiated by the Michigan Groundwater Survey, consists of residential well logs and chemical analyses of samples collected from residential wells by the Barry County Health Department. Qualitative and statistical analyses of the data indicate that the glacial drift aquifer is recharging the bedrock aquifer throughout most of the county. Groundwater quality appears to be controlled mainly by the open-system dissolution of carbonate minerals. The water chemistry is also influenced …
Sedimentology Of The Bedford-Berea Sequence (Early Mississippian), Williams Field, Michigan, David Alan Balthazor
Sedimentology Of The Bedford-Berea Sequence (Early Mississippian), Williams Field, Michigan, David Alan Balthazor
Masters Theses
The Berea Sandstone has produced in excess of 1.6 million barrels of oil in the Williams field since discovery in 1980. Seven lithofacies are identified from conventional core in the Bedford-Berea sequence. These facies are interpreted as deltaic deposits comprising prodelta (Bedford Shale), delta front, destructive marine shale, abandoned distributary channel-fill, interdistributary bay-fill, transgressive marine sandstone, and marine shale (Sunbury Shale) facies. Passive channel-fill facies truncate reservoir sandstone bodies and compartmentalize the field NW-SE across the trend of the northwestplunging anticline.
The two reservoir facies in the Williams field are the delta front and transgressive marine sandstones. The sandstone framework …
Effects Of Capillarity On Dnapl Thickness In Wells And In Adjacent Sands, Timothy V. Adams
Effects Of Capillarity On Dnapl Thickness In Wells And In Adjacent Sands, Timothy V. Adams
Masters Theses
Physical model experiments were used to investigate the behavior of dense non-aqueous phase liquids (DNAPLs) in various geologic media.
The objectives of the laboratory investigations were to (a) compare DNAPL thickness in wells to thickness in adjacent sands, (b) observe and interpret dyed DNAPL migration in unsaturated and saturated sands, and (c) study DNAPLs' effects on clay layers.
Two cylindrical glass columns fitted with various well screens were filled with sand, clay layers, water, and dyed DNAPLs in four experiments. Columns were packed with fine or coarse sand and clay layers. Coarse hydrophobic sand was also used.
At equilibrium, DNAPL …
Anderson Localization Effects In The Light Transmitted Through A Rough Thin Metal Film, Naimah Mohd. Shafie
Anderson Localization Effects In The Light Transmitted Through A Rough Thin Metal Film, Naimah Mohd. Shafie
Masters Theses
The theory of Anderson localization is used to study transmission enhancements in the diffusely transmitted light through a rough thin metal film. These transmission enhancements arise due to phase coherent effects associated with Anderson localization of surface polaritons and are manifested as a well-defined peak in the angular distribution of the intensity of the diffuse component of the transmitted light for light moving opposite to the specularly reflected beam.
The dependence of the widths and heights of the localization related transmission peak is investigated with computer programming and calculations by McGurn and Maradudin (1989). The peak is found to depend …
Reduced Order H∞ Controller Design, Seng Chu Chow
Reduced Order H∞ Controller Design, Seng Chu Chow
Masters Theses
"The problem formulation and the development of the H∞ optimal control theory are reviewed. Various H∞ robust controller design techniques, including both state and output feedback cases, together with a brief comparison and some remarks on these methodologies arc presented. Also included are a review of the controller order reduction alternatives and various balanced truncation model reduction methods.
A new model reduction technique with reduced error bound is proposed. This proposed technique introduces a new parameter which can be used to select the spectral norm of the model reduction error at low and high frequency ranges according to …
Coordinated Strategic Planning Of Hydroelectric Energy Usage Using Stochastic Dynamic Programming With Decoupled Production Cost Simulation, Duane David Highley
Coordinated Strategic Planning Of Hydroelectric Energy Usage Using Stochastic Dynamic Programming With Decoupled Production Cost Simulation, Duane David Highley
Masters Theses
"The method of Stochastic Dynamic Programming is applied to the problem of Long-term hydrothermal coordination for a five-reservoir system in the Midwest. The model that has been developed will optimize the monthly reservoir elevations to produce the lowest expected energy production cost. The production cost calculations are decoupled from the Dynamic Programming loop, resulting in shorter execution times. Constraints are included for maximum and minimum reservoir elevations, maximum monthly reservoir rise and drop, and maximum and minimum monthly energy production. These constraints help to reduce the state space and shorten execution time. An additional constraint is modeled to control the …
A Comparison Of Ancient Mathematical And Calendrical Systems, Karen Schlauch
A Comparison Of Ancient Mathematical And Calendrical Systems, Karen Schlauch
Masters Theses
No abstract provided.
A Study Of Periphyton, Sediment And Diatom Community Structure As Monitors Of Heavy Metal Pollution In The Embarras River And Brushy Fork, David L. Vaultonburg
A Study Of Periphyton, Sediment And Diatom Community Structure As Monitors Of Heavy Metal Pollution In The Embarras River And Brushy Fork, David L. Vaultonburg
Masters Theses
The purpose of this study was to evaluate periphyton (diatom) and sediment heavy metal content and diatom community structure as potential monitors of heavy metal pollution in the upper reaches of the Embarras River system. The study was initiated due to recent industrialization in the area which could potentially contribute to the present heavy metal burden of Brushy Fork and the Embarras River. These streams are already subject to agricultural runoff, wastewater plant effluent, landfill leachate and other miscellaneous urban and highway runoff. The Embarras River system drains an area of approximately 2800 square miles in 11 east-central Illinois counties …
Development Of Ruthenium Vinylbipyridine Modified Electrode Surfaces For Use In Chemiluminescence-Based Detection Systems, Matthew F. Piescinski
Development Of Ruthenium Vinylbipyridine Modified Electrode Surfaces For Use In Chemiluminescence-Based Detection Systems, Matthew F. Piescinski
Masters Theses
Based upon the chemiluminescent properties of [Ru(bpy)3]2+ and the proven analytical applications of that complex in the detection of easily reduced anions in solution, a chromatographic detection system was designed utilizing an immobilized form of the Ru(ll) complex. The objective was to create, by electropolymerization, a regenerative chemiluminescent surface on a working electrode. Reductive electropolymerization was accomplished by the use of a [Ru(bpy)3]2+ analog containing the ligand vinylbipyridine. Two analogs, [Ru(vbpy)3][PF6]2 and [Ru(phen)2(vbpy)][PF6]2 were polymerized on platinum, glassy carbon and indium-doped tin oxide working …
A Review Of The Literature On Self-Care Children: A Need For Empirical Studies, Stephanie L. Perry
A Review Of The Literature On Self-Care Children: A Need For Empirical Studies, Stephanie L. Perry
Masters Theses
The term "self-care child'' refers to a young child who returns from school and remains at home unsupervised for an indefinite period until the parents arrive from work, or one who is alone before school in the mornings. In this paper, the emotional functioning, social functioning, and academic performance of self-care children were compared to adult-supervised children. Also, programs designed for self-care children were examined.
When examining the current literature on the self-care child regarding loneliness, anxiety and behavior problems, susceptibility to peer pressure, sexuality, social functioning, and academic performance, no significant differences were found between self-care and adult-supervised children. …
Nursing Care Of The Elderly In The Acute Care Setting: An Investigation Of Powerlessness, Dorothy De Boer Zylstra
Nursing Care Of The Elderly In The Acute Care Setting: An Investigation Of Powerlessness, Dorothy De Boer Zylstra
Masters Theses
This study's purpose was to identify whether persons 65 years of age or older hospitalized with congestive heart failure perceive personal powerlessness. Cognitive competence of the subjects was determined by the Short Portable Mental Status Questionnaire. A Powerlessness Interview Schedule (PIVS) was used to identify subjects' perceptions of personal powerlessness.; Perceived powerlessness was not conclusively apparent in the fifty-one subjects of this study. No subjects received a score of 38 or below. Ten of fifty-one subjects received scores ranging from 46 to 56 which may place them at risk for perceived personal powerlessness. Forty-nine subjects had areas of limited feelings …
Changes In The Black/White Income Ratio, 1939-87, Melvin Keys
Changes In The Black/White Income Ratio, 1939-87, Melvin Keys
Masters Theses
The Black/white income ratio (BWIR) has increased steadily from 1939-87 for families with two incomes. Early-on, the income disparity was greatest for black females compared to black males. Because of race and sex discrimination, black females were lagging far behind society in wage differences. Today, the opposite is true, black males lag far behind black females in income: compared to their white counterparts. One of the reasons for such a large reversal in income differences maybe the opportunities that were available to black females in such occupations as teaching and nursing from 1940-75.
Migration, which looks at regional composition, was …
Maintaining A High School Elective/Vocational Program With The Increase In College Entrance Requirements, Clyde W. Frankie
Maintaining A High School Elective/Vocational Program With The Increase In College Entrance Requirements, Clyde W. Frankie
Masters Theses
This field experience examines how 21 selected Illinois unit district high schools have maintained their elective/vocational enrollments with the 1985 increase in college admission requirements. The 21 high schools identified had a student population between 700 and 1000. A questionnaire was sent to each school requesting information regarding their master schedule. Questions specifically requested data on number of class periods, length of class periods, number of graduation units, faculty teaching load, class maximums and minimums, and percent of college-bound students in respective schools. This data was analyzed through comparative data tables to identify potential solutions or trends high schools are …
Applying The Matching Law In A Sheltered Workshop, Kristin Elizabeth Skousgard
Applying The Matching Law In A Sheltered Workshop, Kristin Elizabeth Skousgard
Masters Theses
This study assessed the validity of the matching law in an applied setting. It manipulated extraneous reinforcement and measured the rate of rocking in a 24-year-old developmentally disabled man. The resulting data were compared to that predicted by the matching law.
The results were important in three ways: (1) extraneous reinforcement systematically affected rocking in an applied setting in the manner predicted by the matching law, (2) a clinically undesirable behavior decreased in frequency, and (3) this decrease occurred in the absence of direct intervention on the target behavior. Thus, to a slight degree, scientific, practical and humanitarian goals were …
An Examination Of The Effectiveness Of Teaching Nonverbal Sensitivity To Students In An Occupational Therapy Curriculum, Darla Kathleen Schurmeier
An Examination Of The Effectiveness Of Teaching Nonverbal Sensitivity To Students In An Occupational Therapy Curriculum, Darla Kathleen Schurmeier
Masters Theses
The effectiveness of teaching nonverbal communication skills to undergraduate students in an occupational therapy curriculum at Western Michigan University was explored by testing students just entering the program and students leaving the campus for their fieldwork experiences. A control group was made up of undergraduate students from curricula that did not purposely teach sensitivity to nonverbal cues. The 50 subjects were tested using the Profile of Nonverbal Sensitivity (PONS; Rosenthal, Hall, DiMatteo, Rogers, & Archer, 1979). Comparisons were made between PONS scores and the subject's area of study, length of time in the program, gender and age. Results showed that …
Cambrian-Early Ordovician Sequence Stratigraphy And Mount Simon Sandstone Petrology-Michigan Basin, Jeffrey T. Cottingham
Cambrian-Early Ordovician Sequence Stratigraphy And Mount Simon Sandstone Petrology-Michigan Basin, Jeffrey T. Cottingham
Masters Theses
Michigan subsurface correlation is complicated in the Cambrian-Early Ordovician section due to limited availability of rock data. Core and cuttings examination demonstrate that similar stratigraphic sequences exist between the Michigan Basin and surrounding regions. Lithofacies in Wisconsin outcrop are similar to their basinal counterparts, and are correlated on the basis of sediment types, sedimentary structures, and the sequence stratigraphic concept.
The Mount Simon Sandstone in Michigan correlates with that observed in Illinois, Wisconsin, and Iowa. Isopach data throughout the Midwest indicate a single depocenter in Northeastern Illinois. Sedimentary structures and lithology indicate a subtidal environment that may be a progradational …
A Hydrogeological And Hydrogeochemical Investigation Of Groundwater At A Landfill For Sludge From The Kalamazoo Wastewater Treatment Plant, Richard Howard Christensen
A Hydrogeological And Hydrogeochemical Investigation Of Groundwater At A Landfill For Sludge From The Kalamazoo Wastewater Treatment Plant, Richard Howard Christensen
Masters Theses
Major cations and anions were analyzed to determine groundwater chemistry at a site used for the disposal of municipal sludge in the late 1960s and contaminated Portage Creek sedimem dredged in the late 1970s. The disposal site consists of five unlined basins constructed over 50 to 100 feet of stratified sand and gravel outwash underlain by silt and clay. Groundwater in the outwash is unconfined and flows from east to west. A groundwater divide in the center of the site produces local divergent flow to the northwest and southwest. Measurements of chemical constituents indicate that three factors influence groundwater chemistry …
Effect Of Refining On The Brightness Of Softwood Ctmp And Tmp Pulps, Ashok Kumar Mishra
Effect Of Refining On The Brightness Of Softwood Ctmp And Tmp Pulps, Ashok Kumar Mishra
Masters Theses
The main objective of this study was to investigate the effect of refining on the brightness of softwood chemithermomechanical (CTMP) and thermomechanical (TMP) pulps. Seven different pulps were refined using a laboratory Valley beater. Brightness, opacity, tensile index, TEA, and fines content of these pulps were determined at four different freeness levels. Scattering (s) and absorption (k) coefficients of these pulps were calculated. One-way analyses of variance (ANOVA) were applied to determine the significance of change in brightness.
Changes in s-values were significantly affected by fiber morphology of different wood species. Refining increased the k-values of the pulps. When the …
Spatial And Temporal Variations Of Synthetic Organic Compounds In The Contaminant Plume Emanating From The Kl Landfill, Lynn Diane Broede
Spatial And Temporal Variations Of Synthetic Organic Compounds In The Contaminant Plume Emanating From The Kl Landfill, Lynn Diane Broede
Masters Theses
Thirty-one synthetic organic compounds have been detected in samples collected from the KL Landfill contaminant plume from March, 1980 to March, 1986. Two groups of organic compounds have been delineated based on their occurrence, concentrations, and persistence throughout the 7-year monitoring period.
Changes in plume geometry and concentration have been studied relative to time, and concentration variations have been related to selected inorganic plume parameters, distance from the landfill, and precipitation. The spatial and temporal distribution of the organic compounds are attributed to biodegradation, three biotransformation sequences, physical properties of the organics and other factors. Three abbreviated anaerobic biotransformation sequences …
Reservoir Geology Of The Dundee Limestone, West Branch Field, Michigan, Brendan Ciaran Curran
Reservoir Geology Of The Dundee Limestone, West Branch Field, Michigan, Brendan Ciaran Curran
Masters Theses
West Branch field is a low-relief, NW-SE-trending anticline near the center o f the Michigan basin. Since 1934, the Dundee Limestone (Middle Devonian) has produced over 12 million barrels of oil from this field. From core studies, six depositional facies types were recognized in the Dundee. These are dominated by bioclastic carbonate sand facies deposited in normal-marine shelf settings. Although burial cements have occluded some porosity, carbonate sand facies have retained significant primary interparticle porosity and are the most important reservoir rocks. Micritic facies with restricted faunal assemblages are present at the top of the Dundee. The top 10 to …
Hydrogeology And Hydrogeochemistry Of The Tekonsha Moraine And Adjacent Interlobate Deposits In Charleston Township, Kalamazoo County, Michigan, Victor V. Melbardis
Hydrogeology And Hydrogeochemistry Of The Tekonsha Moraine And Adjacent Interlobate Deposits In Charleston Township, Kalamazoo County, Michigan, Victor V. Melbardis
Masters Theses
Hydrogeochemical analyses and hydrogeologic interpretations provide the basis for an understanding of local ground-water flow, in a 12 square mile study area, transected by the Tekonsha Moraine and bound by glaciofluvial deposits. Glacial tills separate an upper and lower aquifer system throughout most of the area.
Degraded and tritiated ground water is present in the lower aquifer system. A negative correlation (-0.62) between tritium concentrations and depth is statistically significant (.04). In this local system, hydrochemical trends are characterized by decreases in sulfate percentages and increases in bicarbonate in the direction of ground-water flow. Statistical evaluation of the hydrochemical data …
A Simulation Of A Multi-Hop Communications Network Using A Kinematic Topology Generator And Static Sphere-Packing Power Control, Kevin Charles Davis
A Simulation Of A Multi-Hop Communications Network Using A Kinematic Topology Generator And Static Sphere-Packing Power Control, Kevin Charles Davis
Masters Theses
No abstract provided.
Ctran: Transforming Scientific Fortran Programs To Unix Based Computing Environments, Qi Chen
Ctran: Transforming Scientific Fortran Programs To Unix Based Computing Environments, Qi Chen
Masters Theses
FORTRAN is one of the most popular scientific programming languages. The efficiency, rich libraries, and popularity of FORTRAN support its continued use as a programming language for scientific computing in the near future. However, in current multiprocessor UNIX environments, C is often better supported. The desire to use existing FORTRAN subroutines within such a C environment leads to several options. In this thesis, we introduce a "modern" scientific programming language called CTRAN for this purpose.
We begin with a brief review of the history of scientific programming languages. An introduction of CTRAN is given in Chapter HI. In Chapter IV, …
Robert Grosseteste's De Ubero Arbitrio, Andrew L. Pearson
Robert Grosseteste's De Ubero Arbitrio, Andrew L. Pearson
Masters Theses
De Libero Arbitrio of Robert Grosseteste (ca. 1170-1253) represents his primary exploration of that aspect of man's relationship to nature, to other human beings, and to God, known as free choice. This thesis explores the relationship of his treatise De Libero Arbitrio to his treatises De Veritate, De Veritate Propositionis, and De Scientia Dei. It also offers an outline and summary of De Libero Arbitrio and presents an English translation of Ludwig Baur's edition of the first recension of this treatise with updated notes.