Digital Commons Network^™

Experimental Determination Of Convection Boiling Curves For Water And Ethylene Glycol In A Rectangular Channel With Localized Heating, Andrew T. O'Neill

Masters Theses

Convective boiling experiments were conducted to show the effects of velocity, pressure, and subcooling on both water and a water-ethylene glycol mixture. Boiling curves were obtained in a 30 mm wide by 20 mm high rectangular channel with an upward facing 20 mm wide by 30 mm long rectangular copper heater. The velocity ranged from 0.5 m/s to 4.0 m/s, the pressure ranged from 1.0 atm to 2.6 atm, and the subcooling ranged from 10°C to 50°C. The curves were generated with measured heat fluxes up to 100W/cm² . The inlet conditions of temperature, velocity, and pressure were maintained …

Rhizopine Synthesis – Potential Mediators For Nitrogen Fixation In Legume Plants, Venkat Reddy Guduru

Masters Theses

This research project focused on novel and efficient synthetic approaches of inosamine derivatives (rhizopines). The preparation of specific rhizopines would help elucidate the microbial pathway of rhizopine catabolism and degradation, and determine the role of corresponding genes during nitrogen fixation. We have investigated regio - and stereoselective transformations of myo-inositol derivative 28 utilizing an organostannane as key intermediate towards rhizopine 1a. The synthesis involved several protection and deprotection strategies to control competing reactivities of six hydroxyl groups of myo-inositol. Rhizopine 1a was prepared efficiently as a single isomer in 8 steps and 13% yield by controlling reactions …

Assessing The Accuracy Of The Differential Assessment Of Autism And Other Developmental Disorders (Daadd) As A Screening Tool, Christine Jurgens

Masters Theses

Professionals are encountering children with developmental disorders more often and with more diversity than ever before. Disorder labels are being introduced increasingly early in a child's life in order to qualify them for services. However, characteristics of developmental disorders overlap significantly in young children, with features beginning to differentiate as the child enters formal education at kindergarten age. Debate continues on whether the autistic spectrum is being over-diagnosed, based on increasing incidence and prevalence statistics.

Research has suggested that developmental disorders impact multiple developmental areas, including language, socialization, sensory, motor, and medical/physical aspects and skills. Therefore, distinguishing one developmental disorder …

Cover, Copy And Compare Method Versus Copy, Cover, And Compare Method For Teaching Mathematics: A Comparative Analysis, Joel Grafman

Masters Theses

This study compared the fluency and accuracy rates produced when using the Cover, Copy, and Compare and Copy, Cover, and Compare interventions to complete subtraction math problems. Two second grade classrooms consisting of 20 or more students participated in the study. Participants were administered a pretest, Cover, Copy, and Compare worksheet, Copy, Cover, and Compare worksheet, and a posttest. Results revealed significantly higher digits correct per second (i.e. fluency) scores on the posttest and Cover, Copy, and Compare worksheets when compared to the pretest and Copy, Cover, and Compare worksheets with no difference in the errors per second (i.e. accuracy) …

A Formative Evaluation Of The Alpha Sigma Tau Sorority's National Recruitment Program In Its Inaugural Year, Colleen Elizabeth Coffey

Masters Theses

This study was conducted as a formative evaluation of the Alpha Sigma Tau sorority's national recruitment program. The researcher sought to determine the effectiveness of all aspects of the program over the course of the last year, to discover any perceived needs among undergraduate members and chapters that were not met over the course of the last year, and to create recommendations for the program to be implemented during the 2006-2008 biennial term. Through a mixed method design the study evaluated the program using qualitative and quantitative survey data, focus groups, and existing data on membership intake from the National …

Trends Of Employment-Based Health Insurance: Why Did The Coverage For Private-Sector Workers Decrease During Economic Boom, Yan Ni

Masters Theses

After a decade of erosion of employment-based health insurance coverage in the American population, the overall employment-based health insurance coverage increased beginning in the mid-1990s when the strong economy occurred. According to the previous studies, the labor market and health insurance premium are primary determinants of the coverage rate. However, in spite of the tight labor market and non-existent health care cost inflation (the growth of health insurance premiums is close to the growth of wages), the health insurance coverage of private-sector workers continued to decline. Since the private sector workers are the bulk of the population who benefit from …

An Evaluation Of Beaver Habitat Models For Illinois Rivers, Daniel R. Cox

Masters Theses

Beavers (Castor canadensis) are agents of landscape change, altering the structure and species composition of vegetative communities through herbivory and water impoundment. To better manage beavers in Illinois, improved methods of monitoring riverine populations of this species are needed. The objectives of the study were to (1) locate, map and quantify the spatial distribution of beaver colonies along the Embarras River, (2) test the efficacy of 2 existing beaver habitat models, the U.S. Fish and Wildlife Service's Habitat Suitability Index (HSI) model and Missouri's beaver habitat model, for predicting the relative density of beavers and (3) develop a new multiple …

Nonaqueous Platination For Synthesis Of Platinated 7 Alpha-Substituted Estradiol, Sarah A. Mazzella

Masters Theses

Cisplatin, carboplatin, and oxaliplatin are used clinically for treating some cancers, but are they are not the preferred treatment for breast cancer. The usefulness of these platinum-containing drugs is limited by poor concentration of the active platinum moiety within the tumor before dose-limiting side effects are reached. One way to selectively concentrate a platinum antitumor compound in breast cancer cells is to conjugate the platinum moiety via a malonate linkage to an estrogen which selectively binds to the estrogen receptor (ER) protein. The major obstacle to linking a lipophilic estrogen to a diamino-platinum compound is the lack of solubility of …

The Application Of 31p And 1h Nmr Spectroscopy To The Study Of Freeze Tolerance And Freeze Avoidance In Biological Systems, Nicholas C. Wright

Masters Theses

31P NMR spectroscopy was used to study freeze tolerance of the wood frog, R. sylvatica. Spectra were obtained of living whole body samples and isolated thigh muscle tissue. These results were compared to R. pipiens which is freeze sensitive. R. sylvatica was found to have significantly higher levels of glucose-6-phosphate and several phosphodiesters. Both seasonal and environmental stresses were studied to determine the effect of freezing conditions on the phosphorus compounds present in R. sylvatica. The results show that R. sylvatica is capable of tolerating stresses that are associated with freezing without any drastic changes in the levels of metabolic …

Variations In Elementary Teacher Education Programs Across The Midwest, Shannon Peters (Gauger)

Masters Theses

School districts across the Midwest are constantly seeking out highly qualified teachers for our young students. No Child Left Behind has put a strain on administrators to find the most knowledgeable teachers being produced from elementary teacher education programs. Teachers need to have sufficient content area knowledge of mathematics, science and reading in order to help young students excel in these areas. Not only is the content area knowledge important, so are the strategies teachers use to relay the information. A comparison study was conducted to discover whether there were variances among elementary teacher education program requirements in the professional …

Observing, Navigating, Exploring: The Fourfold Path Of Nourishing Wrath And Others, Greg Holden

Masters Theses

A good poet to illustrate the distinction between modernism and postmodernism would be George Oppen (1908-1986). I believe Oppen's "objectivism" - coupled with a judicious use of deliberate ambiguity - nicely gets us past the postmodern insistence on the illusions of selfhood, reason, and order by insisting on the centrality of the perceiver/thinker amid the objective chaos of perceptions/ideas, while at the same time recognizing the multi-vocal construction of the perceiver/thinker. I believe the self may project its illusions onto reality, but not all reality (including the "self') is always thereby a false image. I have tried to fulfill Oppen's …

Illinois Standards Achievement Test (Isat) Reading Test Performance And Oral Reading Rate Of 3rd And 5th Grade Illinois Students, Angela R. Herrera

Masters Theses

The relationship between Illinois Standard Achievement Test reading scores for 3rd and 5th graders and their oral reading fluency rates was examined. Four hundred fifty nine students in those grades were given reading probes to determine their reading rate. Reading rate was defined as words read aloud per minute correctly on reading probes composed of text from the students' basal readers as measured by the classroom teacher. The Illinois Standard Achievement Test (ISAT) reading test results were obtained in the spring of each year in a group format. The results indicated a modest correlation between the two sets of data. …

Effects Of Self-Monitoring With Accuracy Feedback Versus Self-Monitoring With Corrective Feedback On Students' Performance In Mathematics, Kristina R. Baker

Masters Theses

The current literature suggests that when students are engaged in metacognitive activities, such as self-assessment, self-explanation, monitoring, or revising; their learning is enhanced (Xiaodong, 2001). Further, feedback, an integral element of self-monitoring, has been shown to increase the effectiveness of self-monitoring by guiding students through tasks, delivering corrective feedback that helps the learner identify errors, and providing hints about how to correct the problem (Pintrich, 1995). In this study, the effects of self-monitoring with accuracy feedback and corrective feedback on math performance of fourth grade students were investigated. During a regular mathematics instruction period, the classroom teacher implemented the intervention. …

Effects Of Interspersing On Peer Tutoring Of Sight Words, Jennifer Schultz

Masters Theses

This study investigated the effects of short-term peer tutoring, with interspersal or without interspersal, on sight word acquisition. Four first grade students and two second grade students participated in the study. Student dyads (i.e., 1 tutor and 1 tutee) were either in the without interspersal condition or in the interspersal condition. Using an AB single case design, student performance was measured and graphed in two ways, cumulative learning and student learning rate. Contrary to expectations, results indicated the overall cumulative learning measurement for students in the without interspersal condition acquired the greater number of words learned, required less instructional time, …

Computer Security Perceptions Of Students Attending The School Of Technology At Eastern Illinois University, David C. Fulton

Masters Theses

Computer security is a major concern that demands attention. Computer viruses and other security risks proliferate on a daily basis. In the academic environment several disciplines of learning may share a common network or computer environment. This situation presents a number of challenges for a university. Allowing access to the Internet yet protecting the interests of the school can be a difficult undertaking. Data protection and the liabilities associated with protecting data is a major undertaking for a university.

This thesis examines the perceptions of students attending the School of Technology at Eastern Illinois University in the area of computer …

Bio-Inspired Approaches For Critical Infrastructure Protection: Application Of Clonal Selection Principle For Intrusion Detection And Facts Placement, Kasthurirangan Parthasarathy

Masters Theses

"In this research, Clonal Selection, an immune system inspired approach, is utilized along with Evolutionary Algorithms to solve complex engineering problems such as Intrusion Detection and optimization of Flexible AC Transmission System (FACTS) device placement in a power grid. The clonal selection principle increases the strength of good solutions and alters their properties to find better solutions in a problem space. A special class of evolutionary algorithms that utilizes the clonal selection principle to guide its heuristic search process is termed Clonal EA. Clonal EAs can be used to solve complex pattern recognition and function optimization problems, which involve searching …

Effects Of Education On Gender Income Inequality In The United States, Jiang Li

Masters Theses

This paper examines the relationship between gender income inequality and educational attainment level with reference to the United States (US). The population under consideration is divided into several groups based on their educational levels. Then gender income inequalities are calculated under each educational level. The total educational effect is shown to be composed of three effects. By measuring these effects, it is found that like past studies, more education reduces gender income inequality, but not in every case. Moreover, this paper explores the relative size of each of the component effects within the educational effect.

Characteristics Of Laser Forming Austenitic Stainless Steel Alloys, Jack Robert Pennuto

Masters Theses

"This thesis discusses the investigation of laser forming austenitic stainless-steel alloys for the development of free curve and complex shapes...Previous work in this area has focused on the development of single angle laser forming and process optimization for the development of multi-dimensional shapes. This thesis seeks to discuss the relationship of multiple parallel laser passes and any coupling effects that may exist for the class of austenitic stainless steels, including any metallurgical implications"--Abstract, page iii.

Slope Stability Analysis Of A Lake Michigan Coastal Bluff, Gregory Carlton Young

Masters Theses

Bluff failure along the Lake Michigan coast can be produced primarily by increased pore pressure from perched water tables above lacustrine clay deposits. To test this theory, a site in Allegan County, Michigan with alternating layers of sand, clay and glacial till was chosen for bluff failure monitoring. Historically, the site experiences sporadic massive failures as opposed to neighboring sites that show more regular and uniform displacements. Four pole and cable monitoring lines were measured bi-weekly from December 2001 to October 2003. Lake levels were low and no erosion of material at the base of the slope occurred. Slumps above …

Feature Detection Using Linear Structure Modeling And Pca, Kawshif Muhammed Riaz Ahmed

Masters Theses

An algorithm to extract features from digital images such as cracks in concrete bridges for automated inspection is developed. The algorithm is based on the use of Principal Component Analysis (PCA). In general, PCA is used to reduce the dimensionality of a data set that consists of a large number of interrelated variables while retaining the variation present in the original data set. This ability of PCA will be used in this project to identify clusters using two training sets of images. Linear structure modeling is used to emphasize the image features (cracks) prior to applying PCA. Whole images processing …

Synthesis And Characterization Of A Recombinant Thrombin Inhibitor, Joel Lwande

Masters Theses

The final step of the blood coagulation cascade is catalyzed by thrombin, a serine protease. Like most enzyme activities, thrombin activity encounters inhibition from both direct and indirect inhibitors. A new thrombin inhibitor peptide named theromin was recently isolated from the leech Theromyzon tessulatum, and it is the most potent thrombin inhibitor isolated to date. Theromin is made up of 67 amino acid residues, out of which 16 are cysteines engaged in 8-disulfide bridges.

We synthesized the theromin gene and expressed the protein in Eschericia coli. We purified the recombinant protein and carried out thrombin inhibition assays that …

Hybrid Or Counterpoise? A Study Of Transitional Trebuchets, Michael J. Basista

Masters Theses

This study investigates the engineering and use of a proposed type of trebuchet in the Middle Ages. A study by a prominent historian has suggested the existence of a type of siege weapon that made use of both human and gravitational forces to fire its projectile. My research will investigate this claim by examining select sources, reviewing the engineering principles involved, and determining the viability of such a machine.

After dealing with this theory I will offer my own new interpretation made from the sources. This interpretation will center on the application of ancient technology to make trebuchets more efficient. …

Carbon Nanotube Based Chemical And Biological Sensors, Srikanth Singamaneni

Masters Theses

Carbon nanotubes are among those wonderful molecules man has discovered by chance. Carbon nanotubes are sheets of graphite rolled up to form seamless cylinders. Their outstanding electrical, mechanical and thermal properties form the inspiration behind this work. This work investigates the possible application of carbon nanotubes as biological sensors for the detection of various biomolecules like Streptavidin and Mouse monoclonal Immunoglobulin-G. Electrical conductance changes of Carbon nanotubes for exposure to alcohol vapors were studied. This thesis demonstrates that these quantum wires can form highly sensitive biological and chemical sensors at molecular level. Although the main focus of the-research was chemical …

Prediction Of Crack Growth Rate And Load Interaction Effects Using Damage Accumulation Model, Virender Goswami

Masters Theses

In damage tolerant designs, it is important to know the crack growth behavior of a material, so that sudden failure of a component can be avoided by determining a safe life. There are numerous models available to predict the crack growth rate. Among them the "crack closure model" is most often used for predicting the crack growth rate for different R-ratios and load interaction effects. However recently, the crack closure model has come under criticism by many authors to be flawed and overrated owing to its inherent drawbacks.

Therefore, a mathematical model for the fatigue crack propagation based on damage …

Metal Ion Imprinted Polymers For Biomolecular Recognition, Len A. Harris

Masters Theses

Protein recognition by HPLC, based on histidine residues, was achieved by incorporating a copper chelating ligand covalently bonded to a polystyrene/divinyl benzene substrate, into column packing. The metal ion was bonded to the substrate in two ways: randomly, where the copper was bound to the ligand after the substrate polymerization and imprinted, where the copper was bound to the ligand before the substrate polymerization. The effect of this templating was measured by protein separation parameters of the resulting HPLC chromatographs. The hypothesis of this thesis is the imprinted substrate will have a higher copper content, and with coppers affinity toward …

Resonant And Non-Resonant Inelastic X-Ray Scattering Of Copper Phthalocyanine, Michelle Deleene Tuel-Benckendorf

Masters Theses

With the ever-changing demands of technology and the desire to use new materials to replace the old, researchers have the job to not only find alternative materials, but also understand their properties. There continues to be extensive research in the properties of organic semiconductors, for use in many microelectronic applications. There is very little known about the excitation properties of these materials. For my research, I have chosen to study the electronic excitations of copper phthalocyanine (CuPc), one specific organic semiconductor. To do this, we used resonant and non-resonant inelastic x-ray scattering to measure the evolution of excitations as a …

Low Self-Esteem As It Relates To Anxiety And Depression, Joel B. Makowski

Masters Theses

The purpose of this qualitative study was to explore the relationship between low self-esteem and anxiety and/or depression. Participants were selected based on their subjective experience of having high or low self-esteem. Low self-esteem participants were then selected on the basis of their subjective assessment of attributing anxiety/and or depression to their low self-esteem experience. Two high self-esteem and two low self-esteem participants were interviewed.

High self-esteem participants were found to base their self-worth and respect on an internal locus of evaluation. They did not identify any notable anxiety or depression. Low self-esteem participants were found to base their worth …

Using Stiffeners For Improved Geometric Fidelity Of Flexible Elements, Ankit Kapoor

Masters Theses

Flexible hoses play an important role in safe operation of a transportation vehicle in automotive and aerospace field. Due to lack of accurate and efficient modeling techniques for such flexible elements with large deformation, most Computer Aided Engineering system do not address the problem in their solution methods.

In this thesis a method is presented to improve the geometric fidelity of flexible element models by using off-axis bi-linear stiffeners (spring) into a discrete linear beam model. Resulting deflection of a hose were compared with the digital scans of an actual deflection of the hose. Though the method is computationally expensive, …

Modeling And Validation Of A Brake Hose, Jai Thomas

Masters Theses

Various computer aided design (CAD) softwares have the capability to depict rigid bodies in space accurately. However, the same is not true for the flexible components. This is because flexible components in an automobile are subject to large elastic deformations during the movement of the rigid components to which they are attached.

This research details the application of the principles of computation of the orientation of entities in a simplified coordinate system, vector mathematics, the file I/O features and structured C++ programming to view the rubber hose in CAD after modeling the hose using simulation software. Further validation of the …

Iron-Promoted Remediation Of Atrazine: Solution And Amended Sandy Column Studies, Donghua Zeng

Masters Theses

No abstract provided.