Digital Commons Network^™

Synthesis And Characterization Of Inosamines, Sing Raj Gurung

Masters Theses

This project is concerned with the preparation of scyllo-inosarnine hydrochloride 6, a biologically active compound, which bears six successive stereogenic centers. The synthesis of this compound would help elucidate the involvement of inosamines in biological nitrogen fixation. myo-Inositol served as the starting material to synthesize target compound 6. Regioselective protection and deprotection of myo-inositol provided azide 43 as key intermediate. In the final steps deprotection of five benzyl groups and reduction of azido group was achieved by catalytic hydrogenation. scyllo-Inosamine hydrochloride 6 was fully characterized by m.p., ¹H NMR, ¹³C NMR, IR, EA and via …

Investigation Of Knock In Gaseous Fuels In The Presence Of Diluents, Roshan Ashok Rodrigues

Masters Theses

Recent energy security and environmental concerns have prompted growing interest into utilization of alternative fuels such as, natural gas and landfill gas. These gaseous fuels contain significant amount of diluents in the fuel composition, such as carbon dioxide, nitrogen, water vapor and other trace gases, which vary by geographical location. Successful engine operation is limited by a phenomenon called "knock", which occurs due to auto-ignition of the end gas ahead of the flame front, and therefore, needs to be investigated with the utilization of these gaseous fuels.

The present contribution discusses the experimental set-up, procedure and results of the investigation …

Selection Of Attractor Sounds For An Audio-Based Navigation System For The Visually Impaired, Brad Salisbury

Masters Theses

Research in to human hearing has been very ‘laboratory’ oriented in the sense that the test environments do not replicate most ‘real world’ situations [J.C. Middlebrooks and D.M. Green, Ann. Rev. of Psychology, 42, 135-159 (1991)]. While very useful information is gained from these types of tests, it is difficult to see how ‘real world’ situations affect sound source localization, recognition, and navigation (walking/way finding) performance. Such information is especially important to people who are visually impaired and dependent on prior knowledge of the environment or audio cues for travel. The research reported here was conducted during the development of …

Characterization Of Fracture Systems In Sublette County, Wyoming Using P-Wave And C-Wave 3d Seismic, Keith R. Johnson

Masters Theses

Birefringence of seismic shear waves has proven to be a useful tool for identifying fracture intensity and orientation in the subsurface. Naturally occurring fractures have been shown to contribute to the deliverability of natural gas production in some reservoir formations in Rocky Mountain sedimentary basins. A multicomponent 3D 3C seismic survey acquired on the southeastern end of Pinedale Anticline in Sublette County, Wyoming was mapped to characterize fault systems within the sedimentary section. The tectonic and depositional history in the study area was determined by literature search and by one-dimensional backstripping. Compressional and wrench fault systems were observed and mapped. …

A Survey Of Music Therapists Regarding The Efficacy Of Music Therapy In The Treatment Of Children And Adolescents With Williams Syndrome, Mayumi Hata

Masters Theses

The purpose of this study was to determine music therapist' perception of the efficacy of music therapy interventions for clients with Williams syndrome. By surveying music therapists who have clinical experience with individuals with Williams syndrome, this study attempted to gather following information: (a) music therapists' perception of the efficacy of music therapy (b) predominant technique or approach (c) predominant goals (d) collaboration with other professionals and (e) the referral sources for music therapy. The results indicated that music therapists lack information and experience working with the Williams syndrome population. However, many of the participants who had worked with individuals …

Field Studies Of Hydrophobic Filter Pack Performance In Free Product Monitoring And Recovery, Nathan J. Brandner

Masters Theses

Multiple field experiments were conducted to determine the performance of hydrophobic filter packs, compared to the hydrophilic industry standard filter pack in free product hydrocarbon recovery. Laboratory and field studies have been previously performed in support of enhancing free product hydrocarbon recovery with the use of hydrophobic filter pack designs. This study was an attempt to test the efficacy of using hydrophobic filter pack materials to enhance free product recovery.

Six recovery wells were installed at three field sites, each site utilizing a pair of recovery wells, one hydrophobic and one hydrophilic, to compare their performances. Fine-grained hydrophobic filter pack …

Sedimentology And Stratigraphy Of The Pennsylvanian Saginaw Aquifer, Central Lower Michigan, U.S.A., Niah B. H. Venable

Masters Theses

The Saginaw Aquifer is an important bedrock aquifer serving the needs of over 400,000 people in the Tri-County area of the Central Lower Peninsula of Michigan. The aquifer is comprised of the Pennsylvanian Grand River and Saginaw Formations. This study focuses on expanding existing knowledge of the general sedimentologic and stratigraphic characteristics of these units using conventional geological methods including core analysis, local log to core correlation, local and regional log to log correlation, and biostratigraphy. Analysis of new core from the study area examines facies and depositional environments given cursory coverage in outcrop studies by past researchers.

Incised valley …

Coordination Environment: A New Approach To The Sensing Of Lead (Ii) Itself, Kristina Marie Nespechal

Masters Theses

Lead(II) is a silent poison that has plagued society since 3800 B. C. The average intake of lead in the United States alone is 50 μg per day, which is approximately 100-1000 times greater than that of prehistoric lead levels. Regardless of the banning of lead in paints and gasoline, lead poisoning prevails as a major environmental health risk. Science has the ability to address the concern with this environmental contaminant. The future production of an economical and reliable test kit for lead(II) relies on the luminescence of the heavy metal itself.

The absorption and emission spectra for a series …

Occupational Stress And Slavery: Evidence From Bridgetown, Barbados, Sarah Muno

Masters Theses

In 1996 and 2000, construction workers uncovered unmarked burial grounds in the Pierhead and Fontabelle sections of Bridgetown, Barbados. The human remains were removed in salvage excavation and are now housed at the University of the West Indies and the Barbados Museum and Historical Society. The associated grave goods, documentary record, and initial osteological analysis indicate these individuals were part of the enslaved workforce during the early to mid- eighteenth century. This thesis will explore the presence of vertebral osteophytosis, vertebral anterior wedge compression fractures, vertebral apophyseal facet remodeling and musculoskeletal stress markers among the human remains from Pierhead and …

Competitive Effects Of Uranyl-Organic Complexes On U(Vi) Reduction By Shewanella Putrefaciens, Abraham M. Northup

Masters Theses

Haas and DiChristina (2002) have demonstrated that Fe(III) reduction by the facultative Fe(III)-reducing bacterium S. putrefaciens is mediated by competitive speciation among dissolved organic ligands and functional groups on the cell surface. They also showed that rates of Fe(III) reduction by S. putrefaciens correlate with the thermodynamic stability constants of the Fe(III)-organic ligand complexes. S. putrefaciens can also use U(VI) as a terminal electron acceptor, coupling U(VI) reduction to growth. In this study, S. putrefaciens was incubated in experimental media containing U(VI) in the form of aqueous complexes with a variety of organic ligands that differ significantly in structure and …

Analytical Modeling And Simulation Of An Auv With Five Control Surfaces, John Tomasi

Masters Theses

This research describes the dynamic modeling and numerical simulation of an autonomous underwater vehicle (AUV) with five hydrodynamic control surfaces, necessary for the development of an autopilot algorithm, based solely upon analytical methodologies. The purpose of this research was to demonstrate the ability to develop a low. order approximation of the dynamics and control characteristics of an underwater vehicle that is complete enough to validate a specific design before physical construction begins; therefore, allowing for a more cost effective virtual design, test, and evaluation process. The AUV model developed in this study takes into consideration inertia, hydrostatic forces, hydrodynamic forces, …

Computational Simulation Of Turbulent Forced Convection Flow Over A Horizontal Plate Heater In A Rectangular Channel, Bhagavathi Perumal Natarajan

Masters Theses

The phenomenon of turbulent forced convection in the entry region of a rectangular duct was investigated computationally using commercial CFD software, FLUENT. The Standard k-ε turbulence model from FLUENT was used to model turbulence in the 20mm high x 30mm wide cross-sectional rectangular duct. The operating fluid used for the three-dimensional CFD study was water at an inlet temperature of 90° C, with the velocities ranging from 0.5 m/s to 2 m/s, at 1 atm pressure. A constant heat flux was applied to the base of the rectangular channel with the other flow walls insulated. The heat flux ranged from …

Traffic Grooming, Routing, And Wavelength Assignment In Wdm Transport Networks With Sparse Grooming Resources, Osama Awwad

Masters Theses

While a single fiber strand in wavelength division multiplexing (WDM) has over a terabit-per-second bandwidth and a wavelength channel has over a gigabit-persecond transmission speed, the network may still be required to support traffic requests at rates that are lower than the full wavelength capacity. To avoid assigning an entire lightpath to a small request, many researchers have looked at adding traffic grooming to the routing and wavelength assignment (RWA) problem. In this work, we consider the RWA problem with traffic grooming (GRWA) for mesh networks under static and dynamic lightpath connection requests. The GRWA problem is NPComplete since it …

Spectroscopic Investigation Of Metal-Substitution Of Cytochrome C, Deepthi Kandi

Masters Theses

We study, by absorbance spectroscopy, the incorporation of various metal ions (Cu²+ and Zn2*) into metal-free porphyrin cytochrome c (H₂cyt) as well as the various conformational forms of metal-substituted cytochromes. The H2cyt and desired metalsubstituted cytochromes have significantly different absorption spectra, providing a simple means of monitoring the incorporation of Cu²* or Zn2* into the empty porphyrin prosthetic group. The rates of metal-ion incorporation were studied under protein denaturating conditions using chemical denaturants, like urea and guanidine hydrochloride (GuHCI), and temperature that partially and completely unfold H2cyt, facilitating the incorporation of a metal ion. Moreover, the structural stability of copper …

The Study Of Carbon Acylation Of Highly Delocalized Enolates Using Catalytic Dmap On 3-Phenyl Benzofuranone Derivatives, Xiguang Zhao

Masters Theses

Benzofuranones along with their derivatives compose a diverse array of natural products and drugs, and show a wide variety of biological effects. Several synthetic methods have been published that describe the preparation of 2-(3H)-benzofuranones having mono alkyl or aryl substituents attached to the fused furanone ring with moderate to high yields. To date, reports describing the preparation of disubstituted 2-(3H)-benzofuranones, especially with one acyl group, are rare. Early approaches are limited by low yields, economical expenditure and environmental risk.

Direct acylation of benzofuranones consistently provides O-acylated isomers rather than C-acylated isomers, which are desired products in the great majority of …

Boundary-Crossers: Observation, Chance, And Change In The Fiction Of Thomas Hardy, D. Levi Woolen-Danner

Masters Theses

Thomas Hardy creates in his fiction a world that demands love lead to failure. His hero and heroine are tragic nearly without exception, as if desire were not just a burden, but a catalyst for disaster. Perhaps this is due to the period in which Hardy was living, and his need to reconcile his memories of an idyllic past with the dramatic social and econonomic changes contemporary to his period of novel-writing. Perhaps he is trying to discover a new model of living-one that will not be trapped by human desires. He has created a figure, one I refer to …

Explicit Timing As An Intervention For Children With Adhd, Monica Fischer Girten

Masters Theses

Explicit timing is a procedure that alerts students of their time limits when completing academic tasks. Research on this procedure first emerged in the mid 1970's, and has focused on the effectiveness of this technique for increasing academic response rate. Empirical studies have demonstrated that the explicit timing procedure can increase response rate for a variety of academic skills including mathematics performance, writing composition and reading. However, few studies have focused on the effectiveness of this procedure on special populations, such as students with Attention Deficit Hyperactivity Disorder (ADHD). The purpose of the current study was to determine whether explicit …

Using Social Stories To Correct Social Skills Deficits In A Student With A Learning Disability, April Larson-Evangelista

Masters Theses

Social stories have been deemed an effective intervention for people with autism (e.g., Richard, 2000). The purpose of the present study was to investigate the use of social stories with a participant not diagnosed with an autism spectrum disorder. The participant was an 8 year-old second-grade girl of average intelligence who was diagnosed with a learning disability in mathematics. Upon consulting with her classroom teacher, two social skills were identified as the target behaviors to be addressed in the present study. The first prominent behavioral concern was violation of others' personal space or standing too close to others. The second …

A Correlation Study Between Employee Perception And Customer Satisfaction In An Automotive Manufacturing Corporation, Jason Travis Felton

Masters Theses

Organizations may be able to utilize internal measures of customer and employee satisfaction in order to get a head start on potential customer satisfaction issues. Correlation analysis is employed to determine significance between measures of employee perception and the pulse of customer satisfaction. Employee perceptions and external customer satisfaction metrics are quantified across 3 manufacturing sites to determine relationships between key indicators. Validated survey questions are compiled statistically in composite groups in order to evaluate employee perceptions of customer satisfaction efforts and employee satisfaction efforts. Results are evaluated using Pearson product moment "r". Results indicate a positive correlation exists between …

The Effects Of Repeated Reading And Goal Setting On Student Reading Fluency, Joann T. Ford

Masters Theses

This study investigated the effect of repeated reading and goal setting on students' oral reading fluency (ORF). Third grade students (n=24) were randomly assigned to one of three groups: repeated reading and goal setting, repeated reading, and no-treatment control group. Treatment groups met for six weeks, four times per week for 20 minutes. A paired repeated reading procedure was used and weekly progress monitoring occurred using third grade DIBELS ORF progress monitoring probes. Repeated reading and goal setting group set weekly goals, graphed fluency data, and received feedback. All groups made gains in reading fluency. Although no significant effects were …

Reading Instruction Software Vs. Peer Tutoring For Improving Oral Reading Fluency, Morgan Carlyle

Masters Theses

Research suggests that computer-based instruction program is as effective as peer tutoring in increasing students' oral reading fluency rates. However, few experimental studies have compared these two reading interventions. The present study compared the effect of a computer-based reading instruction program, Reader Rabbit I Can Read with Phonics, with peer tutoring. Second grade students were randomly assigned to computer tutoring, peer tutoring, or control groups; and they read the same reading material for twenty minutes, two times a week for six weeks. Participants in the computer group used a segment of the reading software instruction program, Reader Rabbit I can …

Predicting State Standardized Achievement Test Scores Using Curriculum Based Measurement In Third Grade, Lindsey Mitts

Masters Theses

With No Child Left Behind placing strong penalties on schools not making adequate yearly progress, many schools are searching for ways to predict student performance on state standardized achievement tests. The current study provides evidence as to the predictive nature of oral reading fluency, vocabulary, and comprehension data taken from a basal reading series, as well as student reading levels from an informal reading inventory, on Illinois Standards Achievement Test (ISAT) performance. Multiple regression analyses showed these measures to account for slightly more than one-half of the overall predicted variance in ISAT Reading performance. Furthermore, t-tests showed that a significant …

An Investigation Of The Dynamic Indicators Of Basic Early Literacy Skills (Dibels) And The Illinois Snapshot Of Early Literacy (Isel), Cara Williams

Masters Theses

This longitudinal study was conducted to compare and investigate the predictive power of DIBELS and ISEL measures. Data were collected to determine if ISEL and DIBELS measures similarly identify students as being at-risk. The predictive value of DIBELS and ISEL scores were evaluated in relation to third grade Measures of Academic Progress (MAP) scores and Illinois Standards of Achievement Test (ISAT) scores. Participants included 63 students from one grade level at a Chicago suburban school. Test scores from kindergarten through third grade were obtained for these students. Results indicate that the risk identification of students was significantly different between ISEL …

The Experiences Of African American Males On A Predominantly White Campus, Dannie Earl Moore Ii

Masters Theses

The purposes of this qualitative study were to evaluate teacher/student relationships between African American male college students and white male professors to ascertain to perceptions of college among African American males on a predominantly white campus. To be considered for participation, each student met the following criteria: (1) in their final year of college, (2) had at least one white male instructor, and (3) African American male. Characteristics such as age, academic degree program, extracurricular involvement, and prior enrollment at another institution were not considered among the selection criteria to protect confidentiality. Results from the present study include the perceptions …

Coping Strategy Use And Resilience Among Children Reporting Victimization, Julie K. Gepner

Masters Theses

Prior studies have established the negative implications of peer victimization; additional literature has focused on how children cope with the negative effects of peer bullying. However, no current research has examined the specific coping strategies, which may result in resiliency to the negative effects of peer victimization. The present study examined victimization, coping strategies, and resilience in a sample of 143 third through sixth grade students. The results indicated that the coping strategy of seeking social support was associated with resiliency among victims of aggression. In contrast, coping using externalizing behavior was associated with significantly lower levels of resiliency. The …

The Flood Frog: An Autonomous Wireless Device For Flood Detection And Monitoring, Valerio Plessi

Masters Theses

"Accurate real time monitoring is gaining critical importance in a broad range of domains. Of particular interest to this research is the development of monitoring and detection systems for environmental and structural phenomena. Transportation infrastructures, in particular bridges, provide examples for both categories. Flooding of low water bridges is one example of rapidly evolving environmental phenomena, while stress and vibration are structural phenomena in need of monitoring.

Early warning and advanced preparation for emergency are two of the most effective lines of defense against catastrophic events, where real time monitoring can facilitate containment and recovery efforts. The operating environment of …

Model Checking Control Communication Of A Facts Device, David Andrew Cape

Masters Theses

"This thesis concerns the design and verification of a real-time communication protocol for sensor data collection and processing between an embedded computer and a DSP. In such systems, a certain amount of data loss without recovery may be tolerated. The key issue is to design and verify the correctness in the presence of these lost data frames under real-time constraints. This thesis describes a temporal verification that if the end processes do not detect that too many frames are lost, defined by comparison of error counters against given threshold values, then there will be a bounded delay between transmission of …

Paleocene To Early Eocene Dinoflagellate Cyst Biostratigraphy In Southeast Nigeria And The Cote D'Ivoire-Ghana Transform Margin (Odp Site 959), Hernan Antolinez-Delgado

Masters Theses

"This study represents a contribution to Early Paleogene biostratigraphy in the tropics where published studies are sparse in comparison with mid and high latitude regions. Data were derived from a comprehensive analysis of dinoflagellate cysts (dinocysts) in 45 samples from the Early Paleocene to Early Eocene interval at two localities in West Africa, namely Alo-1 well in the Anambra Basin, southeastern Nigeria, and Ocean Drilling Program Hole 959D (ODP Leg 159) in the Cote d'Ivoire-Ghana Transform Margin. Dinocyst recovery varied from very good to poor, and the specimens were commonly well preserved. The dinocyst data were calibrated with existing calcareous …

A Model Of The Natural Spread Of The Invasive Insect Species Emerald Ash Borer In The Lower Peninsula Of Michigan, Jennifer L. Weller

Masters Theses

More than 8 million ash trees in southeast Michigan have been killed by an infestation of the invasive insect species emerald ash borer (EAB). Since its identification in July 2002, EAB has been found in Ontario (Canada), Ohio, Indiana, and across Michigan. To date, EAB research has concentrated on the entomological classification and no systematic prediction of the pest's diffusion has been made.

This research presents a predictive model for the spread of EAB across the Lower Peninsula of Michigan. Limited data on ash tree population distribution, ·. infestation distribution, and the dispersal rate of the emerald ash borer required …

Determination Of Stiffness Matrix Of Tapered Roller Bearings For Vibration Models, Jeeva Kumar

Masters Theses

The stiffness matrix of tapered roller bearings under radial and axial load conditions was evaluated using an analytical model and an experimental approach. An experimental test system was designed and manufactured to determine the radial stiffness of the bearing under combined axial and radial load conditions. A second fixture was designed to measure the stiffness of the bearing under pure axial load conditions. The stiffness coefficients determined have been compared with those obtained from the analytical model, OEM (Original Equipment Manufacturer) data and ABAQUS model (finite element analysis software).