Digital Commons Network^™

Theoretical Power Generation And Emissions, Experimental Validation, And Educational Application Of An Internal Combustion Engine, Trevor S. Elliott

Masters Theses and Doctoral Dissertations

This thesis addresses the use of experimental means to validate the theoretical power generation and the resulting emissions of an internal combustion (IC) engine. The results of this work will be used to instruct undergraduate engineering students about IC engine theory and prove IC engine theory experimentally. A 2001 GM Saturn 1.9 Liter is the designated IC engine. Thermodynamic, fluid mechanics, and heat transfer calculations were performed based on engine geometry and laboratory environment to obtain theoretical power and emissions values. A test apparatus including a dynamometer, gas analyzers, and computer data acquisition systems was utilized to obtain experimental power …

How Effective Can Gsm Signals, Using Dcm, Be As An Aid To Coastal Navigation?, Charles W.G. Brewer

The Plymouth Student Scientist

The growth of the Global System for Mobile communications (GSM) network has been considerable in recent years, and coverage can be expected in the majority of larger ports around the world. Additionally, the positioning of base stations means that coverage often extends some distance out to sea. Previous research has established that by using GSM signals a relatively accurate position can be determined when using the Database Correlation Method (DCM) in built-up urban areas (Ahonen and Eskelinen, 2003). Conducted in the Plymouth Sound area using commercially available software, this project examines the effectiveness of GSM signal positioning using DCM in …

Patterns Of Abundance And Diversity In Epiphytic Orchids On Parashorea Malaanonan Trees In Danum Valley, Sabah, Kiki O'Malley

The Plymouth Student Scientist

Research in forest canopies has been restricted by access difficulties for a long time, however in the last 20 years techniques to provide access into tree canopies have been developed, now opening a field of biology to more scientists. This study uses rope techniques for accessing the canopy in a primary rainforest system in Borneo, Malaysia, to study the occurrence and patterns of orchid distribution in Parashorea malaanonan dipterocarp trees. Five trees were sampled, a total of 42 orchids from 8 genera were present. Data on branch height, distance from bole, position of the orchid on branch, substrate and associations …

Nitric Oxide And The Immune System: A Literature Review, Hannah Hosking

The Plymouth Student Scientist

Nitric oxide (NO) was discovered as a biologically active molecule over two decades ago and it has since been recognised as one of the most versatile components of the immune system, with involvement in both cytotoxic and regulatory functions. It is a readily diffusible gas that has been established as a universal messenger, capable of mediating cell-cell communication throughout the body. It is involved in the pathogenesis and also the control of infectious diseases, autoimmunity, chronic degenerative diseases and tumours. This review will collate, contrast and compare recently published literature, to provide an up-to-date and contemporary overview of the substantial …

The Experience And Perception Of Concurrent Versus Retrospective Chocolate Cravings, Harriet Taylor

The Plymouth Student Scientist

Seventy undergraduate students participated in a self-report study to investigate the perception of concurrent versus retrospective chocolate-related cravings. This study was interested in exploring whether retrospective cravings were reported as more intense than concurrent cravings due to cognitive distortions over time. Results showed that retrospective chocolate cravings were reported as significantly stronger and more urgent (p< .001), and were characterised by more vivid gustatory imagery (p< .025), than concurrent cravings. All other aspects of chocolate craving were reported similarly across groups. This indicates that retrospective measures of chocolate cravings may provide inaccurate representations of the craving experience. This difference may potentially be found with other types of cravings, and for that reason, where possible, concurrent measures of craving should be given priority.

Involving Students In Researching Learning And Teaching Approaches: An Additional Focus For Undergraduate Student Publications?, Sue Berkill

The Plymouth Student Scientist

Sue Burkill, Head of Education Enhancement, University of Exeter

Applying Palaeoecology To Conservation: A Long-Term Perspective For Informed Management Of A Fynbos Nature Reserve, James Macpherson

The Plymouth Student Scientist

This investigation proposes that long-term perspectives are essential in ecological conservation/restoration. Such a perspective is particularly important for fynbos, which has been substantially altered by an unspecified level of anthropogenic disturbance. Fossil pollen and micro-charcoal deposits are used to establish a proxy record for ecosystem state that can be applied to conservation. This is carried out at a nature reserve in the Langeberg Range, Western Cape, South Africa. Modern pollen-vegetation relationships are also examined to reduce inaccuracies in the fossil record. Three distinct phases are identified for the reserve over a period extending up to ~1000 years before present (BP). …

Can Children Use Similarity Between Actions To Learn Grammar?, Fiona Anning

The Plymouth Student Scientist

The present study was a replication and extension of Casenhiser and Goldberg (2005). Children aged 5;0 to 7;6 were assigned to one of two training conditions, either they were only taught novel verbs in a novel construction paired with appearance scenes or they were additionally trained on novel verbs in the transitive construction. All participants were assessed on both word orders with new novel verbs using a forced-choice comprehension test. The children in both conditions performed significantly worse on the appearance items than the causative trials, which fails to replicate the original study. The translation post-test responses suggest that poor …

"Like An Old Song They Carried In Their Memory": Eudora Welty's Transformation Of Folklore In The Wide Net And Other Stories, Leigh Anna Pendergrass

Masters Theses and Doctoral Dissertations

This thesis looks at the importance of folklore in Eudora Welty's The Wide Net and Other Stories. Folklore fulfills several functions in this collection of stories: it connects the characters within the stories to their culture and the people around them as it highlights the differences between the stark real world and the idealistic folkloric world; folklore also creates a more realistic and relatable experience for the readers of Welty's fiction while Welty allows herself to intertwine her local folklore with more universally known folklore in order to show her respect for her local lore as she allows herself the …

Climate Change In The Casco Bay Watershed: Past, Present, And Future, Cameron P. Wake, Elizabeth Burakowski, Katharine Hayhoe, Chris Watson, Ellen Douglas, Jeff Vandorn, Vaishali Naik, Clare Keating

The Sustainability Institute Publications

No abstract provided.

Review: The Wilderking Trilogy, Janice A. Delong, Rachel Schwedt

All Children's Book Reviews

No abstract provided.

Review: Declaration Of Independence, Rachel Schwedt, Janice A. Delong

All Children's Book Reviews

No abstract provided.

Review: We The People: The Story Of Our Constitution, Rachel Schwedt, Janice A. Delong

All Children's Book Reviews

Character Themes: Citizenship, Responsibility

Review: The King Raven Trilogy, Janice A. Delong, Rachel Schwedt

All Children's Book Reviews

No abstract provided.

Impact Of Preschool Education On Reading Achievement Of Kindergarten Through Fifth Grade Students, Melissa Harvey Clark

Dissertations

This study examines the impact of various types of preschool care and education on the reading achievement of children, kindergarten through fifth grade, who participated in the Early Childhood Longitudinal Study-Kindergarten Class of 1998-99 (ECLS-K). The participants in this study are located throughout the United States of America. These students attend public and private schools.

The data for this study were provided by the National Center of Education Statistics (NCES), a division of the U.S. Department of Education. The researcher utilized ECLS-K's Public Use Data File and Electronic Codebook to create an SPSS syntax file in order to determine if …

In Quest Of Walter Smith: The Past, Present, And Future Impact Of Visual Art In Adult Education, Meredith Amanda Cole

Dissertations

Walter Smith is a relatively unknown historical figure in the art world, but he is essential to defining adult education's past, present, and future in the area of visual art. His artistic endeavors in America sparked facets of the way art education is practiced today. However, along the way we have lost the tenets of social change which he sought but never accomplished. In chapter one, I introduce the purpose of the research. In chapter two, I explain the position Walter Smith entered when coming to America. I also detail Smith's Herculean social reform efforts for adult education and why …

Predictors And Influences Of Graduation Rates In Mississippi Public Schools, Donna Rebekah Holden Chiasson

Dissertations

The purpose of this study was to examine if possible predictors of graduation rates in Mississippi existed. This study included 10 independent variables and one dependent variable. The independent variables consisted of average daily attendance, algebra I scores, teacher salary, socioeconomic status (as expressed in the percentage of students eligible for free and reduced lunch within a school), eighth grade math MCT scores, eighth grade language MCT scores, the number of teachers with advanced degrees, the school's outcome of Adequate Yearly Progress, school size, and principal leadership style.

The dependent variable was graduation rate. A total of 100 schools were …

Entropy And Certainty In Lossless Data Compression, James Jay Jacobs

Dissertations

Data compression is the art of using encoding techniques to represent data symbols using less storage space compared to the original data representation. The encoding process builds a relationship between the entropy of the data and the certainty of the system. The theoretical limits of this relationship are defined by the theory of entropy in information that was proposed by Claude Shannon. Lossless data compression is uniquely tied to entropy theory as the data and the system have a static definition. The static nature of the two requires a mechanism to reduce the entropy without the ability to alter either …

Mathematics Achievement Of Regular Education Students By Placement In Inclusion And Non-Inclusion Classrooms And Their Principals' Perceptions Of Inclusion, Loretta Rodgers Hartfield

Dissertations

This study examined mathematics achievement of fourth and fifth grade students in Mississippi and principals' perceptions of inclusion.

A sample of 462 students from eight separate elementary schools was selected for this study. Fifteen principals completed the Principal and Inclusion Survey regarding inclusion education. Eight of the 15 principals were interviewed with 10 open-ended questions regarding their perceptions of inclusion.

Data were analyzed using an independent two-tailed t test and Pearson product moment correlation. The independent two-tailed / test was used to determine differences in mathematics achievement for fourth and fifth grade students in inclusion classrooms compared to non-inclusion classrooms …

Conservation Genetics And Systematics Of Several Turtles Species In The Southeastern United States, Joshua Robert Ennen

Dissertations

Chelonians (i.e., turtles) are an imperiled group of reptiles with about 66% of the recognized species listed as threatened by the IUCN. Most chelonian species have a unique set of life history traits (i.e., longevity, delayed sexual maturity, and low juvenile survivorship), which makes their populations exceedingly sensitive to increases in adult and juvenile moralities. With numerous anthropogenic effects (e.g., habitat alteration, exploitation, and over harvesting) negatively influencing mortality rates, chelonians have experienced global precipitous declines and extinctions.

This dissertation focuses on species within two chelonian genera, Gopherus and Graptemys. Although these two genera are vastly different ecologically, they are …

Principal Efficacy: An Investigation Of School Principals' Sense Of Efficacy And Indicators Of School Effectiveness, Charles Wayne Lovell

Dissertations

At the individual school level, the responsibility for demonstrating school effectiveness lies on the shoulders of the building administrator. In fact, "it is widely accepted that good principals are the cornerstones of good schools and that, without a principal's leadership efforts to raise student achievement, schools cannot succeed" (Tschannen-Moran & Gareis, 2004, p. 573). However, federal, state, and local mandates have increased the pressure on school administrators to demonstrate effectiveness. As a result, the work of school administrators has changed. Furthermore, Fullan (2003) identifies a trend that demonstrates a dramatic decrease in the principal's perceptions of effectiveness, authority, trust, and …

The Relationships Of Learning Style Balance And Learning Dimensions To Self-Directed Learning Propensity Among Adult Learners, Sarah Tullos Hutto

Dissertations

The purpose of this study was to examine the relationships of learning style characteristics to self-directed learning propensity among adult learners. The learning style characteristics investigated were learning style balance as measured by a scoring method developed by Mainemelis, Boyatzis, and Kolb (2002) and learning style dimensions as measured by the Kolb Learning Style Inventory (LSI). The Oddi Continuous Learning Instrument (OCLI) was used to measure self-directed learning propensity. A questionnaire was used to collect descriptive information about the participants for age, gender, years of professional work experience, and graduate degree program in the categories of business, education, health, and …

Tuning Pig Liver Esterase Enantioselectivity For The Synthesis Of Unnatural Serine And Tyrosine Analogues, Dale Anthony Rosado Jr.

Dissertations

The synthesis of disubstituted and homologated unnatural amino acids and the development of a mass spectrometry based assay for enantioselectivity are presented here. Disubstituted and homologated unnatural amino acids have proven to be effective for the treatment of diseases and for use as imaging agents. Peptides that contain unnatural amino acids have also proven to be effective treatments for various disease states including cancer. The potential to evaluate such unnatural amino acids for pharmaceutical properties is limited by the available syntheses. No method currently exists that will allow for the synthesis of homochirally similar unnatural amino acids from a common …

Application Of Molecular Modeling In The Noncovalent Dispersion Of Carbon Nanomaterials, Praveen Kumar Madasu

Dissertations

Molecular modeling is a powerful tool to better understand the intermolecular interactions of carbon nanostructures. It provides structures and energies not easily obtainable from experiments and predicts properties that can be tested experimentally. Intermolecular interactions play an important role in the aggregation of various carbon nanomaterials. Three molecular modeling studies of carbon nanomaterial dispersions are presented in this dissertation, with an emphasis on illustrating how effective these theoretical techniques are in providing insight on the selection of dispersion additives. To achieve our goals, we employed molecular mechanics based methods, along with semi-empirical methods, and quantum mechanical methods, such as density …

The Advanced Placement And International Baccalaureate Programs: The Graduates' Perspective, Shannon Saxby Smith

Dissertations

This study was designed to solicit the perspectives of AP and IB graduates who have completed at least one semester of postsecondary education about their experiences while in their respective programs. This study was also conducted to determine whether these IB graduates report that they were better prepared for postsecondary studies than students who participated in the AP program. The researcher was also able to determine whether AP and IB graduates believed they experienced any long-term benefits or detriments by having been in their programs and whether they believed their experiences were worthwhile. Lastly, the researcher was able to determine …

The Relationship Between Leadership Behaviors, Teacher Collaboration, And Student Achievement, Angela Nix Mchenry

Dissertations

Educational administrators face the unprecedented challenge of increasing student achievement for all students. One response to this challenge has been to increase and improve teacher collaboration. This study analyzed the relationship between elementary principals' leadership behaviors, teacher collaboration, and student achievement. The relationship between the variables of teacher age, years of experience, and years working with the current principal were also analyzed using multiple regression.

A random sample of 161 Mississippi elementary teachers in 15 schools were surveyed, using the researcher-designed questionnaire, Leadership for Collaboration. These responses measured the teachers' perception of their elementary principals' leadership behaviors and the level …

A Pilot Study Of Organizational Performance, Performance Barriers And Faculty Engagement In The Nursing Education Unit, Yolanda Chapman Turner

Dissertations

This pilot study was driven by the problem of market disequilibrium and the subsequent overarching desire to identify and describe principles and processes taken by nursing education units to optimize market equilibrium for nursing service in response to cyclical market demands. Given the complexities of market responsiveness in conjunction with changes in healthcare delivery, health economics, population demographics, higher education and other contextual factors, it is essential for nursing education as a whole to be in a position to respond to demand. The purpose of this study was to investigate organizational performance, performance barriers and faculty engagement in the nursing …

The Effect Of The Alabama Mathematics, Science, And Technology Initiative (Amsti) On Middle School Students' Scores In Mathematics And Science, Toni Boyd Ramey

Dissertations

The purpose of this study was to determine whether the application of the Alabama Mathematics, Science, and Technology Initiative (AMSTI) program in middle schools reduced the gaps found between students' CRT scores; specifically, did the gaps found in the CRT scores within the respective subgroups race, gender, SES, and special/regular education narrow? The subject areas considered by this study were mathematics and science. Student-level data were collected and examined for longitudinal changes over a three year period in which the AMSTI program was implemented at two participating public middle schools. The dependent variables used were mathematics and science CRT scores …

High School Sophomores' Perceptions Of The Role Of Extra-Curricular Activities As Preparation For College Admission, John Earl Wyble

Dissertations

While there is significant interest and emphasis on student participation in extra-curricular activities, limited research on such participation and the benefits it may possess toward preparing students for college admissions exists. A survey of 312 high school sophomores in a rural, southeastern Louisiana school district was conducted. Data were collected through the survey on the students' participation in extra-curricular activities and their perceived value of such participation toward gaining admission to a postsecondary institution. The purpose of the study was to analyze the relationship between participation in extra-curricular activity and the perceived value of such participation toward gaining admission to …

Teacher Education Preparation Assessment System And The National Council For Accreditation Of Teacher Education Accreditation, Deborah Lynn Vaughan Stoulig

Dissertations

The purpose of this study was to investigate how the assessment systems of teacher preparation programs have changed since the new NCATE Standards were implemented in 2004, what methods of data collections are being used, and to measure coordinators' perceptions of the assessment systems. An electronic survey was developed by the researcher based upon a review of related literature, the researcher's personal experience, and years of reviewing data collection software. An invitation to the survey was emailed to 631 NCATE Coordinators or equivalent as identified from their institution's website with 221 participants completing the survey for a return rate of …