Digital Commons Network^™

An Evaluation Of The Role Of Senior Traveller Training Centres, Maureen Foley

Dissertations

The study evaluates the role of the Senior Traveller Training Centres regarding further education. The centres provide basic compensatory education for Travellers aged 18 upwards. The aim of the centres is to provide Travellers with the knowledge, skills and attitudes required to successfully make the transition to work and adult life. It examines the rationale for the centres, the management structure, why people decide to go to the centres, and the curriculum. The study also highlights the difficulties the Traveller community have faced in the past and are still facing today in terms of equality of outcomes in education. Travellers …

Adaptation To College And Individuation-Attachment : A Review Of First Year Students In Contemporary Ireland, Sarah Simmons

Dissertations

The substantive aim of this study was to examine the adaptation of young-adult‟s to college life in Ireland today. The study also assessed the participant‟s levels of individuation-attachment and its consequences for college adjustment. A number of personal variables were examined in relation to both the participants‟ college adjustment and individuation-attachment, with gender being of significant interest. Data were collected from a sample of 125 (78 females and 47 males) first-year college students attending a number of Dublin based institutions. Participants‟ completed quantitative measures of college adjustment and individuation-attachment. Findings indicated that overall student adjustment was positive, with levels of …

A Study Of Anti-Social Behaviour On Dublin Bus Routes, Kevin Scott

Dissertations

The area under investigation was the phenomenon of criminological behaviour occurring on Dublin Bus Routes. Research questions were based around: 1) what anti-social behaviour is occurring on buses, 2) when is this behaviour occurring, 3) who is perpetrating this behaviour and 4) how is anti-social behaviour on buses being tackled? Two problematic bus routes and one control route were selected based on geographic spread and the comparative ratio of criminal incidents involved (the 78A, 77 and the control case: 46A). A statistical analysis of existing information from Dublin Bus surrounding anti-social behaviour on these routes was conducted. The researcher then …

On The Rolling Motion Of Viscous Fluid On A Rigid Surface, Xinli Wang

Dissertations

This thesis considers two closely related problems. First, the influence of insoluble surfactant at a moving contact line is considered. This work is mostly motivated by the air entrainment during the coating process where there is a three-phase contact point (e.g., air, liquid and solid). For moving contact line problems, when the fluid is assumed to be an incompressible Newtonian fluid and a no-slip boundary condition is enforced at the solid boundary, the non-integrable stress singularity arises at the contact line, which is physically unrealistic. The contact angle of 180° is considered as a special case in which the singularity …

A Mathematical And Computational Exploration Of The Effect Of The A-Current In Determining The Activity Phase Of Follower Neurons, Yu Zhang

Dissertations

Bursting oscillations are prevalent in neurons of central pattern generators (CPGs) that produce rhythmic motor activity, and the activity phase plays an important role in determining the normal or dysfunctional network output. The activity phase is the delay time-with respect to some reference time in each cycle and normalized by the oscillation cycle period-of the onset of action potentials by a neuron. This dissertation investigates how the A-current, in conjunction with other intrinsic properties, sets the activity phase of a neuron driven by inhibition.

This dissertation is divided into two major components. In the first component, methods of dynamical systems …

Service Supply Chain Management : A Hierarchical Decision Modeling Approach, Roger Angel Solano-Cayama

Dissertations

A Service Supply Chain (SSC) may be described as a network of service provider facilities (in-house or outsourced), each of which is able to process one or more service tasks on an as needed basis. Two key characteristics of a SSC are (i) the business service is decomposable into several sequential tasks that can be processed by different service providers, and (ii) the primary capacity resource is skilled labor. SSCs are increasingly being developed by companies that experience a high variability of demand for their services (e.g., loan processing, analytical consulting services, emergency repair crews, claims processing, etc.). Typically, the …

Investigation Into The Acupuncture And Meridian System, Jingong Pan

Dissertations

The Meridian system conceived by the ancient Chinese has been described and referenced for more than a thousand years. The Meridians meaning paths are the main trunks that run longitudinally within the body. The Meridian system consists of about 400 acupuncture nodes and 20 Meridian channels connecting most of these points. It deals with the routing and distribution of certain signals that may affect physiological functions. It integrates meridians, tissues and organs into a complex system.

Initially, modeling of the acupuncture system is investigated. The physical effect of injecting an acupuncture needle at a node is suggested by an equivalent …

Modeling Edge Effects Of Mesa Diodes For Silicon Photovoltaics, Jesse S. Appel

Dissertations

A mesa diode has been modeled and its performance under dark and illuminated conditions has been simulated using a commercial finite element software package. These simulations have led to a determination of the self-consistent solution to the continuity equations for electrons and holes using the steady-state drift-diffusion model for carrier dynamics coupled with electric potential determined from Poisson's equation. The purpose of these simulations has been to determine the influence of edge conditions on the overall performance of mesa diodes under dark and illuminated conditions.

Mesa diode arrays are fabricated on crystalline silicon solar cells. They are an array of …

Probing Spin, Charge And Lattice Coupling In Manganites, Zhiqiang Chen

Dissertations

Complex oxides such as the manganites exhibit an intimate coupling of the electron spin, charge and lattice degrees of freedom. The characteristic feature of these materials is the existence of a ground state topology with many closely lying minima. The system can be switched from one minimum to another by the application of external parameters such as strain, temperature, magnetic fields, or electrical fields. These materials thus exhibit large responses to these external parameters and can be used as novel sensors in data storage and other applications. Understanding the couplings will have an impact on the fundamental science of highly …

Novel Polypropylene Based Microporous Membranes Via Spherulitic Deformation, Kuan-Yin Lin

Dissertations

A novel method for creating a microporous polypropylene membrane via spherulitic deformation is described. The microporous structure was generated by the combination of intra-spherulitic and inter-spherulitic deformations. Polypropylene was selected due to its unique cross-hatched lamellar morphology facilitating inter-spherulitic deformation. A precursor film with a spherulitic structure was made under low-stress melt processing condition. A tangential lamellae-rich spherulite was created and identified with a positive birefringence sign. A sequential annealing process improved the crystalline structure, and in particular the thickness of the tangential lamellae. The annealing process proved to be critical for initiating the inter-spherulitic deformation. The post-extrusion process conditions …

Ionic Liquids As Additives For Biodegradable Polyactic Acid, Ku-Il Park

Dissertations

In this study, two ionic liquids (IL) with different anions (decanoate, tetrafluoroborate) but with the same phosphonium based cation were evaluated as potential plasticizers and lubricants for polylactic acid (PLA) and also for their effects on its hydrolytic and thermal degradation. Both ILs at 5wt% were well dispersible and partly miscible with PLA as evidenced by scanning electron microscopy/energy dispersive x-ray scattering, SEMIEDX, and glass transition temperature, T_g, characterization, as well as from solubility parameters calculations.

The effects of the IL containing a decanoate anion were more pronounced on lubrication and degradation as evidenced by reduced melt viscosities …

Multi-Functional, Self-Sensing And Automated Real-Time Non-Contact Liquid Dispensing System, Qiong Shen

Dissertations

Liquid dispensing in the order of pico-liter has become more and more important in biology, electronics and micro-electronic-mechanical-system (MEMS) during the past two decades due to the rapid progress of researches on the deoxyribonucleic acid (DNA) microarray, compact and low-cost direct write technology (DWT), organic semiconductors and nano-particles.

The existing approaches, commercialized or experimental, to liquid dispensing in minute amounts have one common shortcoming: open loop control, i.e., they have no direct control on the quality of dispensed liquid. In contrast, the SmartPin has intrinsic self-sensing capability to not only control the process of liquid dispensing, but also the results …

Degradation Of Polylactic Acid In The Presence Of Microsize And Nanosize Fillers, Quyuan Zhou

Dissertations

Polylactide (PLA)-cationic (montmorillonite, MMT) and anionic (hydrotalcite, HT) clay micro- or nanocomposites based on semicrystalline and amorphous polymers and unmodified and organomodified as well as calcined or non-calcined clays at 5wt% concentration are produced by melt mixing. Depending on the clay type, presence of organomodifiers and calcination, micro- or nanocomposites are produced, as confirmed by XRD and SEM analysis.

Unfilled polymers and their composites are subjected to isothermal degradation in air at 180°C and 200°C. Degradation rate constants are calculated from novel equations incorporating IV. Results show that the thermal degradation rate constants of the amorphous PLA and its composites …

Flexible Electronics : Materials And Sensor Fabrication, Katherine J. Duncan

Dissertations

This dissertation demonstrates how to fabricate piezoelectric/pyroelectric thin films by using different printing techniques. These techniques could replace vacuum techniques for manufacturing piezoelectric/pyroelectric sensors. Ink-jet, screen and stencil printing techniques were developed to print these devices.

This work outlines attempts to develop a solution processable conductive ink for ink-jet printing. It then details the printing of commercial conductive ink on flexible substrates employing the three printing methods. Raman spectroscopy and Fourier transform infrared spectroscopy, are both used to investigate the structure of the P(VDF-TrFE) films. Optical microscopy is used to investigate the thickness and uniformity of the deposited films. The …

Synthesis And Characterization Of Atmospheric Pressure Chemically Vapor Deposited Aluminum, Sipeng Gu

Dissertations

This study investigates the use of atmospheric pressure chemical vapor deposition (APCVD) to produce high quality aluminum coatings for corrosion protection of steel. The coatings were produced through thermal decomposition of tri-isobutyl-aluminum (TIBAL) over the 275 to 300°C temperature range. Under optimal deposition conditions, growth rates as high as 1.2 um/min were achieved. X-ray photoelectron spectroscopy, auger electron spectroscopy, glow discharge optical emission spectroscopy and nuclear reaction analysis revealed that the coatings consisted essentially of pure aluminum (~99 at.%) with oxygen and carbon present as minor constituents. The coatings were characterized in terms of their morphological, structural, electrical, and mechanical …

An Exploration Of The Relationship Between Stress Physiological Signals And Stress Behaviors In Preterm Infants During Periods Of Environmental Stress In The Intensive Care Unit., Niang-Huei Peng

Dissertations

The purpose of this descriptive study was to examine relationships between stress physiological signals and stress behaviors in preterm infants during periods of environmental stress. The study used a repeated-measures design to examine the relationships between environmental stressors, sleep-wake states, and both stress physiological signals and stress behavioral responses in one group of preterm infants. Measurements of these variables for each preterm infant were recorded every two minutes during four 60-minute observation periods (two in the morning and two in the afternoon) conducted over two days (one morning and one afternoon observation each day). The sample was 37 preterm infants …

Shadows Over Goshen: Plain Whites, Progressives And Paternalism In The Depression South, Fred Carl Smith

Dissertations

This dissertation is about poverty and rural Southerners and the beginnings of America's rational assault on poverty. By 1932, a sense of emergency and desperation permeated American economic and political thinking. The apparent collapse of the industrial economy and credit markets created an environment in which politicians allowed and the public demanded bold experimentation. The period, 1933-1937, in which most of America approved or tolerated progressive notions, offered an opportunity for progressives to demonstrate their solutions to persistent southern poverty. The Division of Subsistence Homesteads (DSH), an agency of the Department of Interior, created communities that combined subsistence gardening with …

Review Of The Genus Polycheria Haswell, A Symbiotic Group Of Amphipods (Crustacea: Dexaminidae) With Descriptions Of New Species From Florida, The Caribbean Sea, And The Indo-Pacific Region, John Milton Foster

Dissertations

Systematics and taxonomy of the dexaminid amphipod genus Polycheria Haswell (Dexamindae: Amphipoda), whose members are cosmopolitan associates of tunicates and sponges, are confused. This is due in large part to the many inadequate and incomplete descriptions and poorly some executed illustrations, especially for the early studies on the group. Previously, 22 nominal species or forms have been described or designated in the literature. The purpose of this study is to critically review and clarify the systematics of this enigmatic genus. Based on personal collections and on specimens from museums, five new species are designated and 22 species or forms are …

Factors That Are Associated With Students' Standardized Reading Achievement Scores, Cherie Nichole Mothershead

Dissertations

This study examined the factors that are associated with students' standardized reading achievement scores. The participants in this study were obtained from two sources: a national and a regional sample. The national participants were located throughout the United States of America, and the regional participants were from a school district in a southeastern state.

The data for the national sample were provided by the National Center for Education Statistics (NCES), a division of the U.S. Department of Education, and the regional sample was provided by surveying all fifth grade teachers in a school district from a southeastern state. These two …

The Role Of Teachers In School Safety, Leslie Lee Brown

Dissertations

This study examined teachers' perceptions of their abilities to effectively respond to crises on their school campuses. Teachers were surveyed in numerous southeastern states in contrasting demographic areas. Much of the literature addressed acts of violence, natural disasters, and threats of terrorism in schools. Past literature designates urban areas as places where violence has been a more prevalent element of everyday life. Current evidence shows that school shootings and natural disasters can occur anywhere. This shows that planning, practicing, and preparing for crises events are imperative no matter the demographic area in which a school is located. However, there is …

Middle-Level Leaders Perceptions Of Accountability, Deena Cousar Brown

Dissertations

The purpose of this study was to identify the perceptions of middle-level principals personal and school accountability, their perceptions of beliefs and competencies that influence improvement in student achievement and accomplishment of accountability, and their perceptions regarding the adequacy of professional development and preparation for middle-level principals that affect their ability to improve student achievement and perform their leadership role in an increased accountability environment. This study specifically examined differences in the perceptions of middle-level principals' accountability based on the socioeconomics of the school, the number of years of administrative experience, and previous middle-school teaching experience.

Induction And Peer Coaching Programs In A Middle School Setting, Shanti Ladawn Howard

Dissertations

While almost half of new teachers engage in some type of induction program, many programs only offer superficial types of assistance including district-wide orientations, periodic workshops, or instruction in classroom management (Gold, 1996). Some induction programs sponsored by the state institute an evaluation process that applies formulaic criteria for defining teaching behaviors to assess new teacher performances (Darling-Hammond et al., 1999). In the continued search for school improvement, there was a need to propose another option in staff development, e.g., peer coaching.

Peer coaching was examined because induction programs did not attend to the individual needs of alternatively certified teachers. …

The Emotional Intelligence And Resilience Of School Leaders: An Investigation Into Leadership Behaviors, Aileen Thompson Bumphus

Dissertations

Recent research suggests that leadership in schools and emotional intelligence are related. Furthermore, resiliency has been researched and found to be linked to successful leadership. As a result of these findings and the researcher's own professional experiences, it is speculated that emotional intelligence, resilience, and school leadership may be highly related factors in how one leads a school. The study of this three-factor relationship has been virtually overlooked in the research on school leadership and might prove useful in the recruitment, identification, development, and retention of effective school leaders.

A study of the emotional intelligence, resilience, and leadership of public …

A Metamorphosis Of Thought: Parent Education Based On Transformative Learning Theory In A Title I-Funded Middle School, Ayanna Lichelle Shivers

Dissertations

Section 1118(e)(2) of the No Child Left Behind Act of 2001 encouraged public schools to conduct and evaluate parent education programs to assist with closing the achievement gap. In an effort to combat the existing problem, the researcher engaged in a mixed-methods study to address four research questions.

A comparative-quantitative study, using the Middle School Parent Perception Survey, was conducted to determine if there were statistically significant differences in perceptions of parents whose children attended Title I funded and non-Title l-funded schools in the following areas—barriers to parent involvement, their ability to assist their children with schoolwork, and the support …

Identifying Preschool Students In Need Of Early Intervention, Cassie Delso Wells

Dissertations

The purpose of this study was to investigate a screening instrument targeting identification of preschool students in need of early intervention in order to determine the screening instrument's predictive validity. This study specifically examined the relationship between student scores on the DIALS and student achievement in reading at the end of first grade. All participants in the study were residing on Alaska's North Slope and the majority were Alaska Natives. The remote geographic location of the North Slope along with the ancient traditions of the Inupiat Eskimos, including the Inupiaq language that is still spoken among the residents of the …

Perceptions And Knowledge Of Special Education Law Among Building Administrators In A Selected Georgia School District, Patricia Claire Grasso

Dissertations

The Individuals with Disabilities Education Act (IDEA) has impacted every school district in the United States and significantly altered the role of administrators. Requirements for the administration and supervision of special education have developed exponentially since the enactment of Public Law 94- 142 and its reauthorization as the IDEA.

The purpose of this study was to compare the perceptions and knowledge of building administrators regarding special education law. The following research questions were developed to facilitate this study: (a) is there a difference in the level of knowledge about special education law among building administrators regarding the seven provisions of …

Rhetoric With Humor: An Analysis Of Hispanic/Latino Comedians' Uses Of Humor, George Pacheco Jr.

Dissertations

Hispanic/Latino comedians' use of humor as argument is a rich environment to study. The relationship between the comedian (as the joke teller) and the audience (as the receivers of the joke) creates an environment where many topical boundaries fall, and the comedian is free to express him/herself without fear of persecution or ridicule. More specifically, this setting allows the comedian to use the platform as joke teller to communicate arguments to the audience through humor. Comedians who use humor rhetorically often communicate arguments about well-known stereotypes freely because audiences attend shows expecting to laugh.

Using Kenneth Burke's (1959) perspective by …

Fort Zumwalt School District Professional Development Plan: A Qualitative Study Of Current District Perceptions And Proposed Changes, Jackie K. Floyd, Jennifer A. White

Dissertations

In the Fort Zumwalt School District, the professional development program lacks a district focus resulting in different professional endeavors dependent upon popular trends or interests rather than teacher and student achievement needs. Written procedures for evaluating the Fort Zumwalt Professional Development Plan have not been implemented at the district level in a systematic manner resulting in the current plan remaining unchanged and with limited evidence of impact on teaching and classroom practices. The researcher collected data from Fort Zumwalt K-12 certified teachers using three instruments: (a) reflection/evaluation sheets, (b) needs assessments, and (c) an electronic questionnaire. The data from these …

Understanding Similarity: Bridging Geometric And Numeric Contexts For Proportional Reasoning, Dana Christine Cox

Dissertations

The concept of similarity is uniquely situated at the crossroads of geometric and numerical proportional reasoning. Although studies have documented the existence and nature of student difficulties with this topic, there exists a gap between documented visual insights of younger children and the quantitative inadequacies of older ones. Using a revised version of the Similarity Perception Test followed by 21 clinical interviews, this study investigated the visual and analytical strategies that are used by middle-school students to differentiate and construct similar figures.

New strategies for construction and differentiation were identified, and three overarching conclusions were drawn from the work. First, …

Evaluation Of A Progressive Model For Identifying Preferred Stimuli For Children With Developmental Disabilities, Amanda M. Karsten

Dissertations

Preference assessments for individuals with disabilities differ along many dimensions, including time requirements for implementation and probability of identifying a hierarchy of relative preferences. Some methods of assessment are also more conducive to use with individuals who exhibit problem behavior or certain prerequisite skills. Inaccurate results and loss of valuable treatment time are among the risks associated with selecting ineffective or unnecessarily lengthy procedures. The purpose of the current investigation was to evaluate a progressive model for conducting preference assessments which incorporates many of the aforementioned considerations. Concurrent-operant reinforcer evaluations were used to verify assessment findings. Based on 17 participants …