Digital Commons Network^™

Prey Preference As A Function Of Feeding Experience And Prey Type In Neonate Gartersnakes (Colubridae: Thamnophis), Kathryn B. Hale

Masters Theses

Several species of potential prey have been introduced into the geographic range of the Two-striped Gartersnake, Thamnophis hammondii. Some of these prey species possess defenses that present novel challenges to the snake predator. Despite novel predator defense mechanisms (including secretions from skin glands), adult T. hammondii ingest several of these prey species without adverse effects. Although ~dult T hammondii are dietary generalists, almost nothing is known about prey preferences in newborn individuals that lack feeding experience. My study determined whether or not T. hammondii innately exhibits a preference among native and introduced prey types. Furthermore, I compared the degree of …

A Model Cost Analysis Comparing Solar, Wind And Geothermal Energies, Including Alternatives To Changing Energy Sources, Using Texas Households And Weather, Kimberly Speed

Masters Theses

The Emergency Economic Stabilization Act of2008 (P.L. 110-343) provides several incentives and tax credits for Americans interested in investing in alternative energy resources. Solar, wind, and. geothermal systems receive the most tax credits due to their low carbon output, but a determination must be made as to which resource is the most accessible and economically feasible. The State of Texas was used as a model for comparing the three renewable energy resources through analysis of weather variables, geological features, resource availability, amount of energy harvested in relation to equipment, and installation and maintenance costs.

All three energy systems have positive …

The Application Of Visual Phonics And Phonological Awareness Interventions To Address Emergent Literacy Development In Speech-Language Impaired Preschoolers, Elizabeth K. Gergits

Masters Theses

This study investigated the effectiveness of phonological awareness intervention versus phonological awareness intervention supplemented by visual phonics han,d cues upon emergent literacy skill development in preschool children with speech and/or language impairment. A pretest - posttest control group design was used to compare the effectiveness of phonological awareness intervention and visual phonics in promoting the development of the following emergent literacy skills: alphabet knowledge, beginning sound awareness, print awareness, rhyme awareness, nursery rhyme awareness, phonological awareness at the syllable level, and name writing abilities. Three groups were formed from twenty-four subjects from at-risk early childhood programs in central Illinois. The …

The Effect Of Person Versus Aac Directed Apraxia Therapy On Elicited Imitation For Children With Autism Spectrum Disorder, Jeanna Rachelle Probst

Masters Theses

There is limited research in the area of Augmentative and Alternative Communication (AAC) and autism spectrum disorder with childhood apraxia of speech. The current research project was designed to evaluate the amount of elicited imitation produced when using a person-directed stimulus mode versus an AAC-directed stimulus mode. The dependent variable was elicited imitations. The independent variables were the AAC-directed condition and the person-directed condition.

The subjects were six school-aged children with the diagnosis of Autism Spectrum Disorder (ASD) and Childhood Apraxia of Speech (CAS). The subjects were pulled out of their regular 45 minute individual speech therapy and randomly presented …

Oral Reading Fluency And Maze Selection For Predicting 5th And 6th Grade Students' Reading And Math Achievement On The Illinois Standards Achievement Test, Samuel Whitley

Masters Theses

This study sought to examine the relationship between two reading curriculum based measures ( oral reading fluency and MAZE) and the reading and mathematics subsections of the Illinois Standards Achievement Test (ISA T) at the 5th and 6th grades. It was predicted that MAZE would be better at predicting who would pass the ISAT than oral reading fluency. Bivariate correlations were conducted between each curriculum based measure and each subsection of the ISA T. Simple linear regression analyses were also conducted to derive cut scores for predicting ISAT performance. The ability of each curriculum based measure to predict student performance …

The Big Five Personality Traits As Predictors Of Academic Maturity, Ryan W. Althoff

Masters Theses

Big Five measures of personality have long been used to assess the relationship between personality and academic performance. The Academic Maturity Scale (AMS), a 101-item instrument designed to identify the skills, strategies, and motivations that are shared among successful students, has been shown to be correlated with academic performance (Addison, Althoff, & Pezold, 2009). In the present study, I assessed the relationship between personality characteristics and academic maturity, specifically which personality characteristics are the best predictors of academic maturity. I administered the Big Five Inventory (BFI; John, Donahue, & Kentle, 1991) and AMS to 163 students from introductory and upper …

The Best Predictors Of Self-Reported Depressed Mood In Adolescents, Melissa H. Wineberg

Masters Theses

The present study examined multiple predictors of depression simultaneously in order to determine which variables best predict self-reported depressed mood in adolescents. Although the current literature has identified several individual variables and their relationship to depression in adolescents, few studies have investigated multiple variables at the same time in relation to depression. Participants included 4,693 high school students from a Midwestern state. Of these students, 4 7% were girls, 4 7% were boys, and 6% did not indicate their gender. These students attended various high schools across seven counties and were recruited for a health prevention program called I Sing …

The Role Of Remedial Work: A Look At Re-Offending, John M. Koth

Masters Theses

Many studies have evaluated the usefulness of remedial work ( apologies, excuses, and justifications) after a transgression or injustice has been committed. The present study tested the effectiveness of remedial work after a first, and then a second transgression. One hundred and sixty undergraduates read a vignette describing a social transgression. This was followed by either an apology, an excuse, a justification or no remedial work. After completing variables rating their reactions to the vignette, participants were asked to read a second vignette and to answer the same questions. During the analyses, two justifications used in the study were found …

Social Anxiety And Problematic Drinking In College Students: The Influence Of Alcohol Expectancies And Gender, Jackie Kuhn

Masters Theses

Problematic drinking among college-aged students represents a serious problem. Research has focused on predictors of problematic drinking, including cognitive distortions and alcohol expectancies. In addition, symptoms of social anxiety have been · related to college student drinking. This paper reviews the literature on the link between social anxiety and problematic drinking and describes a study examining this link. Specifically, this study expanded on the existing literature by testing the mediating ability of positive alcohol expectancies as well as assessing depressive symptoms and their relationship to drinking behaviors. The main model in this study incorporated social anxiety and problematic drinking with …

Behavioral Mediators And Moderators Of Adolescent Victimization And Suicidal Behavior, Brett J. Litwiller

Masters Theses

This study examined the relationship between victimization and suicide in adolescents. It was hypothesized that substance use, violent behavior, and risky sexual behavior would all increase adolescent suicide risk and mediate the relationship between adolescent victimization and suicide. It was further hypothesized that parental support, dietary nutrition, and physical activity would decrease suicide risk and moderate the relationship between adolescent victimization and adolescent suicide. To test these hypotheses, selfreport surveys were administered to 4,700 public high school students. Regression analyses of data indicated that the amount of victimization significantly predicted the amount of suicidal behavior reported. Similarly, substance use, violent …

Facial Recognition System Screening Evaluation Methodology For Complexion Biases, Harold Harris

Masters Theses

Over the years, facial recognition systems (FRS) have come under scrutiny from watchdog groups who voice their complaints concerning the potential existence of FRS biases towards certain cultures of people when deployed in security screening situations. Psychology has used the term "other-race effect" to describe this occurrence in humans. Researchers of FRS have used the theory behind the other-race effect to describe the occurrence of bias associated with algorithms tested during the Face Recognition Vendor Test of 2006. In this thesis, we develop a scientific methodology based on the factors of illumination, distance, and angle to evaluate whether or not …

A Comparison Of The Wechsler Intelligence Scale For Children Third Edition And The Wechsler Intelligence Scale For Children Fourth Edition, Alyson M. Taylor

Masters Theses

There are no specific guidelines to determine when or why intelligence tests should be revised; however, revisions typically occur every 10 to 15 years to keep up with the moderate change in IQ over time, known as the Flynn effect (Flynn, 1984, 1987). Revisions also eliminate and update outdated items, content, and materials; extend age ranges, floors, and ceilings; as well as incorporate new theoretical changes. To assess cognitive abilities the Wechsler Scales are frequently used by clinical and school psychologists. Previous studies comparing versions of the Wechsler Intelligence Scale for Children (WISC) found significant correlations (.80s and .90s) and …

Bridging The Digital Divide: Framing Whiteness, Martha L. Wilkinson

Masters Theses

The American Recovery and Reinvestment Act of 2009 signed by President Obama established the Broadband Technology Opportunities Program (BTOP) for the purpose of building and strengthening broadband infrastructures. (National Telecommunications and Information Administration, 2010). In the twin cities of Champaign and Urbana, Illinois efforts were made by a local Broadband Access Committee (BAC) to obtain funding for various projects. One project involved installing fiber-optic rings to connect buildings including schools, hospitals, and police/fire departments, along with other vital agencies. Additionally, this money would also be utilized to bring fiber to the home (FTTH) to neighborhoods indentified as underserved. Additional grants …

Experimental Study On Thermal Treatment Of Used Printed Wiring Boards (Pwbs), Xiangjun Zuo

Masters Theses

The availability of cheaper and better electronic products as a result of the rapid innovation in technology in past decades has driven the production of e-waste forward. Printed wiring board (PWB) is a component made of one or more layers of insulating material with electrical conductors. The existing processes of recycling PWBs use pyrometallurgical or hydrometallurgical methods, which generate atmospheric pollution. Green recycling has obvious benefits to decrease the amount of PWBs. Green recycling includes two features, 1) little or zero pollution of toxic gases and heavy metals, and 2) efficient (quick and economical) recycling.

The aim of this work …

Glass Fiber-Reinforced Polyurea Strengthening Of Reinforced Concrete, Courtney Elizabeth Greene

Masters Theses

"Wide varieties of concrete repair-retrofit and strengthening methods have been developed and are being widely implemented. In recent years, the need for such strengthening systems has become apparent with increasing demands on aging infrastructure. These strengthening systems need to be increasingly more adaptable, providing ease of construction as well as withstanding a variety of loading conditions and hazards. Exterior-applied fiber-reinforced polymer systems are increasingly being used to meet these demands. The research contained herein investigates the strengthening benefits and characteristics from a specific glass fiber-reinforced polyurea coating system applied externally to structures by means of spraying. This coating would allow …

Finite Element Modeling Of Bird Strikes And Parametric Evaluation Using Design Of Experiments (Doe), Venkata Varaha Raja Naga Prathyush Bheem Reddy

Masters Theses

"One of the major threats to Aviation industry is the in-flight impact of birds. Aircraft windshields are intensively vulnerable to damage and hence need a certification requirement for a proven level of impact resistance. Bird strike experiments are very expensive and henceforth explicit numerical modeling techniques have grown importance. This compilation mainly relies on the theory of hydrodynamic impact and addresses basic shockwave equations. A smooth particle hydrodynamics based approach is chosen and the numerical simulation is carried out using contact-impact coupling algorithm. The simulation is run using the nonlinear explicit finite element code LSDYNA ver.971, developed by Lawrence Livermore …

Gpu Based Processing For Airborne Detection, Dheeraj Singiresu

Masters Theses

"Onboard real-time processing is highly desirable in airborne detection applications. As the data processing involved here is computationally expensive, typically high power multi-rack system is required to achieve real-time detection. Use of such hardware is often not feasible in an airborne application due to space, power and weight constraints. In this thesis, different computing architectures suitable for real-time onboard processing are compared in terms of computation speed, watts/GFLOPS, and weight/GFLOPS. A brief description of the modem GPU architecture and the current GPGPU technology is provided. GPU implementations of some computationally expensive image processing applications such as band-to-band registration for Multi …

Bayesian Approaches On Observational Before-After Highway Safety Analysis, Daxiao Liu

Masters Theses

"Observational before-after evaluation of roadway safety treatments effect is a necessary and challenging study area for traffic safety engineers. In decades, empirical Bayesian approach has been widely adopted among researchers in this area. In this approach, the researcher combined before period observation data with a safety performance function estimated from similar groups to estimate the expected number of crashes that would have occurred in the after period without the treatment. Comparing this estimate with the number of crashes observed in the after period, the researcher evaluated the effectiveness of the treatment. This approach accounts for well-known regression-to-the-mean effects. However, as …

Impact Of Management Status, Gender, And Level Of Project Involvement On Corporate Governance In A Role-Based Enterprise Portal Environment, Daniel Augusto Pereira Brás Sequeira

Masters Theses

"The underlying objective of this research project is to investigate the impact of management status, gender, and level of project involvement on corporate governance in a role-based enterprise portal environment. This is achieved through a case study which included the development of a role-based enterprise portal site prototype assessed through surveys targeted at different stakeholders at the case company. Six hypotheses were formulated addressing the core research question. The outcomes of the hypotheses testing suggest employees' perceptions of role-based enterprise portal's effectiveness, usability, and corporate identity design are, in general, not influenced by the employees' management role, gender, and project …

Establishing Workload Limitations For Application In Human Systems Integration, Muhammet Servet Gulum

Masters Theses

"As the amount of technology involved in the typical workplace increases and standard operational procedures become increasingly sophisticated the danger of overloading an operator's mental resources is increasing. As much as these technological developments help operators with daily tasks, for example by providing information via monitors and wireless headsets; it also increased the mental workload due to the bombardment of information. Mental workload is commonly associated with information processing tasks, limits. With all the extra information inputs it is difficult to set limits where excessive information becomes dangerous. The workload optimization is critical as it directly affects system performance and …

Excitation Of Whispering Gallery Modes In Glass Microspheres Using Optical Fiber Couplers, Sudha Sneha Devarakonda

Masters Theses

"This research is a study conducted on the excitation of whispering gallery modes (WGM) in small micron-scale glass spheres. Optical WGM may be represented by a light wave that propagates along the surface of the sphere and reaches back itself in phase at specific wavelengths. Due to this, very high intensities of light with narrow line widths circulate in the microspheres contributing to high Q factor. The evanescent field of an optical waveguide is used to resonantly stimulate the WGM.

The WGM excitation in fused silica spheres was demonstrated in the laboratory with 60% coupling efficiency. Tapered optical fibers were …

Mechanical Properties And Microstructure Study For Direct Metal Deposition Of 316l Stainless Steel, Tian Fu

Masters Theses

"Direct metal deposition or laser cladding is a process capable of producing fully dense and net shape metal products and this process could be used on coating metal components in various engineering applications. This process has fast heating and cooling rates which can improve the surface hardness and provide excellent adhesion through metallurgical bond between coating material and substrate. This paper evaluated the laser deposited 316L stainless steel coating on 4340 steel, which is widely used for aircraft landing gear applications. The microstructure, micro-hardness and quantitative EDS were explored to verify the coating properties. The desired homogeneous microstructure and high …

The Marketing Value Of Graduate Certificate Programs In Higher Education: A Strategic Assessment, Susmitha Akula

Masters Theses

"The last five years have seen a significant increase in the popularity of non degree graduate certificates. This increase has raised questions about the value of graduate certificate programs from the perspective of students, alumni and industry employers. Do certificate programs provide real world skills and knowledge valuable to industry? Do they serve as effective recruiting tools for the university? Do they provide opportunities for students to meet their professional goals in terms of salary increase, promotions, and the like? The present research is specifically aimed at answering these questions. Surveys that assess perceptions of value of graduate certificates to …

Strength Evaluation And Transportation Behavior Of Preformed Particle Gel Using Screens And Tubes, Rajesh Sarma Challa

Masters Theses

"This research included a series of experiments, using screen models to evaluate the strength of swollen gel particles. It also includes the study of PPG propagation and extrusion behavior through tubes of various internal diameters. The effect of the particle gel swelling ratio (depending on brine concentration), flow rate; and mesh size on the gel injection pressure and injectivity were studied. The results show that gel injection pressure depends primarily on the swelling ratio and the mesh size. However, the injection pressure does not increase significantly with injection rates, behavior consistent with the real-time injection pressure and injection rate change …

Symbol Synchronization And Dynamic Channel Estimation In Multiple Input Multiple Output Systems Using Statistical Analysis Of Eye Diagrams, Abhishek Gupte

Masters Theses

"The research work presented in this document is the continuation of the project to develop a Multiple Input Multiple Output (MIMO) system using band-limited signals in strong multipath environments. The modulation format used is Gaussian Frequency Shift Keying (GFSK). Band-limiting introduces controlled Inter-Symbol Interference (ISI), which along with a multipath environment degrades the features of the received signal waveform that are vital to the performance of standard symbol synchronization techniques. A low complexity algorithm was deemed necessary to counter this problem so that the benefits of conserving bandwidth would not be obviated by an expensive and elaborate receiver architecture.

Such …

Sintering And Microstructural Effects On Mechanical Properties Of Zirconium Carbide-Tungsten Cermets, Melissa M. Giles Craft

Masters Theses

"Zirconium carbide-tungsten cermets were prepared by in situ reaction sintering a mixture of zirconia and tungsten carbide. Tungsten is a refractory metal with a melting point of 3422⁰C; however, its mechanical strength decreases significantly with increasing temperature. One approach to improve the elevated temperature strength is to add ceramic particulates to the matrix. Zirconia and tungsten carbide were compacted and then reacted and sintered in a single step by heating to 2050⁰C. The resulting stoichiometric zirconium carbide-tungsten cermet had a relative density greater than 96%. Cermets with two different grain sizes were produced by altering the final sintering temperature. Sintering …

"In Situ" Printed Circuit Board Material Extraction Procedure With Conductor Surface Roughness Study, Amendra Koul

Masters Theses

"Analysis of printed circuit board (PCB) behavior in a wide frequency range from tens MHz to at least 40 GHz is very important for modern high-speed digital design and assuring for signal integrity (SI). this analysis includes preliminary evaluation of per-unit-length parameters of the PCB transmission line and transmission line characteristics, such as propagation and attenuation constants, and also extraction of these parameters from measurements on real test vehicles. This thesis describes an impedance calculator tool, which can substantially speed up PCB design, and the second topic considered in this work is characterization of dielectric parameters of substrates of printed …

Performance Evaluation Of A Novel Diesel Fuel Air Separation And Filtration System For An Indirect Injection Diesel Engine, Michael Ray Hess

Masters Theses

"The objective of this research was to evaluate an air/fuel separation system known as a Fuel Preporator. The device's efficacy was determined by studying the effect of air entrainment on engine performance and fuel consumption of a General Motors 6.5 L naturally aspirated indirect injection (IDI) diesel engine. A test bed was developed to accommodate the test engine and test methods were adapted from federal regulations for steady-state engine testing (40 CFR 89 Subpart E). Cases of 0%, 5%, 10%, and 20% volumetric air entrainment were investigated for engine operation with and without the Fuel Preporator. Key measured engine performance …

Field Analysis Of Photovoltaic Ultracapacitor Energy Storage System, Jenna Vujic

Masters Theses

"In the field of innovative power sources, photovoltaics are playing an important role as a clean energy source. Because performance is dependent on instantaneous weather conditions, all stand-alone photovoltaic (PV) systems require an energy storage device. Batteries are not suitable for PV source applications due to depth of discharge restrictions, maintenance requirements and minimal power density availability. However, ultracapacitors (UCAPs) have a high power density, require little maintenance, and can be used in sequence with a dc-dc converter to maintain power output at an increased depth of discharge. This paper describes a PV-UCAP power system used to collect and compare …

Seismic Interpretation And Reservoir Characterization Of The Middle Frio Formation In The Stratton Field Gulf Coast Basin Of South Texas Using Three-Dimensional Seismic And Well Log Data, Uchenna H. Aboaja

Masters Theses

"The Stratton field is a large mature gas field located between Nueces County and Kleberg County in the northwest Gulf Coast Basin of south Texas. The Oligocene middle Frio Formation is one of the major progradational units within the Stratton field. It is characterized by rapid deposition and high subsidence rates that create complex internal facies architecture. The reservoir facies architecture of the middle Frio Formation is described as channel-fill deposits, crevasses-splay deposits, and floodplain mudstones. Previous two-dimensional seismic studies indicate some level of compartmentalization. Three-dimensional seismic and well log data provided by the Bureau of Economic Geology at the …