Digital Commons Network^™

Effectiveness Of Teaching Modalities For Pre-College Level Mathematics Courses, Dorothy Latuszek

Dissertations

College educators are challenged with providing students with choices of teaching modalities that facilitate student achievement and success at a time when students are also seeking flexible scheduling and accommodation of their differing learning styles. This is certainly the case for college students who need to demonstrate proficiency for the content in pre-college level mathematics courses prior to enrolling in college-level mathematics courses. The term "pre-college level" is defined as courses in reading, writing, and mathematics for college students lacking those skills necessary to perform college-levelcoursework at two- or four-year college institutions (Parsad & Lewis, 2003).

Do certain teaching modalities …

An Investigation Of Secondary Teachers’ Knowledge Of Rate Of Change In The Context Of Teaching A Standards-Based Curriculum, Jihwa Noh

Dissertations

This study investigated teachers' mathematical content knowledge and pedagogical content knowledge with respect to rate of change in the context of teaching a Standards-based high school mathematics curriculum that emphasizes rate of change as a central theme, the Core-Plus Mathematics Project (CPMP) materials. A framework was designed to provide a comprehensive guide for analyzing different aspects of rate of change knowledge incorporating existing frameworks relative to rate of change, NCTM recommendations described in Curriculum and Evaluation Standards for School Mathematics andPrinciples and Standards for School Mathematics (NCTM, 2000), and research related to pedagogical understanding of rate of change.

Data …

Analysis Of Benzo(A)Pyrene-Induced Gene Expression Changes In Fisher 344 Rat Liver By Affymetrix Microarray And Quantitative Real-Time Pcr, Alhaji Umar N’Jai

Dissertations

No abstract provided.

Two High School Teachers’ Initial Use Of Geometers Sketchpad: Issues Of Implementation, Kathryn G. Shafer

Dissertations

This study documents two teachers' instructional practices as they learn and incorporate Geometer's Sketchpad (GSP) activities into their curriculum. The researcher (as a mentor) worked closely with two high school geometry teachers following a case study methodology. As a secondary goal, this study examined the use of a mentor as a professional development model to assist classroom teachers in the learning and implementation of Geometer'sSketchpad. Data were gathered through interviews, surveys, observations, classroom videotape, participant journal entries, as well as researcher field notes.

Results are reported in the areas of goals of instruction, method of instruction, role of the teacher, …

Divine Minds: The Cognitive Foundations Of God And Religion, Todd Tremlin

Dissertations

Understanding how human brains work bears directly on the study of religion. Introducing the new "cognitive science of religion," this dissertation explains how natural mental processes that shape everyday human thought are also responsible for the arising and persistence of religious ideas and for the content and development of religions. The central claim of this work is that understanding the origin and features of god concepts and the religious systems that form around them requires an understanding of the adapted mind. This argument unfolds in two parts. The first explores the cognitive foundations ofsupernatural beings. It discusses in both evolutionary …

The Effects Of Negotiated Written Feedback Within Formative Assessment On Fourth Grade Students' Motivation And Goal Orientations, Craig Alan Waddell

Dissertations

This research was a field-based investigation into the impact of written feedback on students' perceptions, motivation, and academic performance. Seventy-nine fourth grade students, from five elementary classrooms participated in two studies. Study 1 (n=15) was an ABAB-type, reversal design, intended to provide support for a cause-and-effect relationship between feedback scores (i.e., a rubric-based evaluation of teacher's written feedback) and feedback effectiveness (i.e., a survey-based measure of students' views on the value of written feedback). Study 2 (n=64) was a quasi-experimental study intended to demonstrate: a) the relationship between feedback scores and feedback effectiveness, b) an association between feedback effectiveness and …

Pitchfork Bifurcations Of Invariant Manifolds, Jyoti Champanerkar

Dissertations

In a parameter dependent, dynamical system, when the qualitative structure of the solutions changes due to a small change in the parameter, the system is said to have undergone a bifurcation. Bifurcations have been classified on the basis of the topological properties of fixed points and invariant manifolds of dynamical systems. A pitchfork bifurcation in R is said to have occurred when a stable fixed point becomes unstable and two new stable fixed points, separated by the unstable fixed point come into existence.

In this thesis, a pitchfork bifurcation of an (in- 1)-dimensional invariant submani-fold of a dynamical system in …

Numerical Simulation Of Microwave Heating Of A Target With Temperature Dependent Electrical Properties In A Single-Mode Cavity, Hoa Kien Tran

Dissertations

This dissertation extends the work done by Hue and Kriegsmann in 1998 on microwave heating of a ceramic sample in a single-mode waveguide cavity. In that work, they devised a method combining asymptotic and numerical techniques to speed up the computation of electromagnetic fields inside a high-Q cavity in the presence of low-loss target. In our problem, the dependence of the electrical conductivity on temperature increases the complexity of the problem. Because the electrical conductivity depends on temperature, the electromagnetic fields must be recomputed as the temperature varies. We then solve the coupled heat equation and Maxwell's equations to determine …

Modeling Contaminant Transport And Fate And Subsequent Impacts On Ecosystems, Ming Fan

Dissertations

Assessing risks associated with the release of metals into the environment and managing remedial activities requires simulation tools that depict speciation and risk with accurate mechanistic models and well-defined transport parameters. Such tools need to address the following processes: (1) aqueous speciation, (2) distribution mechanisms, (3) transport, and (4) ecological risk. The primary objective of this research is to develop a simulation tool that accounts for these processes. Speciation in the aqueous phase can be assessed with geochemical equilibrium models, such as MINEQL+. Furthermore, metal distribution can be addressed mechanistically. Studies with Pb sorption to amorphous aluminum (HAG), iron (HFO), …

Modeling Usage Of An Online Research Community, Yi Zhang

Dissertations

Although online communities have been thought of as a new way for collaboration across geographic boundaries in the scientific world, they have a problem attracting people to keep visiting. The main purpose of this study is to understand how people behave in such communities, and to build and evaluate tools to stimulate engagement in a research community. These tools were designed based on a research framework of factors that influence online participation and relationship development.

There are two main objectives for people to join an online community, information sharing and interpersonal relationship development, such as friends or colleagues. The tools …

Toxicity Of Manufactured Particulate Materials On Plant Root Growth, Ling Yang

Dissertations

The rapid development of particle technology and the growing use of particulate materials in industries are bringing large amounts of manufactured particles into the environment. Epidemiological studies suggest that fine particles (particles with aerodynamic diameter smaller than 2.5 μm, i.e., PM_2.5) have an association with various adverse health effects in humans. Mass studies have been performed on the toxicity and toxicological mechanisms of airborne particles such as PM_2.5 and PM₁₀, but there are very few investigations which contribute to the knowledge base on biological implications of manufactured particulate materials. Up to now, the published toxicity …

Teachers’ Career Decisions In A Cognitive Framework: Logistical Regression Analysis Of A National Data Set, Tamara H. Rosier

Dissertations

Research was conducted in order to determine if extrinsic, cognitive or situative sets of variables could predict teachers' career decisions using the Schools and Staffing Survey (SASS). Questions from the survey were divided into three cognitive perspectives: extrinsic, cognitive, and situative. Stepwise logistic regression analyses were used to predict group membership among those who chose to stay in their current position and those who left the profession.

Results for the extrinsic set of variables indicated that while the model was a good fit, the ability of the model to predict was low. Teachers agreeing that student behavior interferes with ability …

Avid Program Graduates: Negotiating The First Year Of College, Leslie J. Hays Edd

Dissertations

Although the Advancement Via Individual Determination (AVID) program has been operating in San Diego County for more than twenty years, there was a lack of research investigating how AVID program graduates experienced the transition to college. A well-established positive correlation between acceptances to four-year universities by AVID program graduates exists, but research on AVID lacked individual student narrative needed to give more depth to the data. The purpose of this case study was to investigate the transition experiences of AVID program graduates who were beginning their second year of college at competitive four-year public universities. All eight participants, in the …

A Comparative Study Of Interrater Reliability Coefficients Obtained From Different Statistical Procedures Using Monte Carlo Simulation Techniques, Ebrima Nying

Dissertations

Reliability estimation is a key research component within the global area of educational assessment. The literature reports numerous studies using different statistical techniques for estimating reliability of educational measures. However, few have focused on the estimation of interrater reliability of performance assessment (Abedi, Baker, & Herl, 1995). Specifically, this study compared three different methods for estimating interrater reliability to determine if there are differences among these estimates as a function of: sample size, measurement scale, number of raters and the theoretical population reliability (rho). The three methods of estimation were the Intraclass Correlation (ICC(2, k )) (Shrout & Fleiss, 1979), …

Mothers Of Us All: When Does Political Message Take Precedence Over Art In Some Modern And Contemporary Women’S Poetry, Shanda Hansma Blue Easterday

Dissertations

This dissertation contains an essay with the above title, as well as two sections of poems. The first section of poems is entitled Maria Sibylla Merian, Artist and Naturalist , and is a collection of poems about, and in the voice of, Merian. Many of these are what are known as personna poems. The second section of poems is entitled The Beekeeper's Wife , and uses autobiography as a framework for communicating the humor in human relationships, and for illustrating the surrealism in the human race's relationships with the natural world.

My research for my essay entailed the study of …

Essays On The Econometrics Of Financial Volatility, Yasemin Bardakci

Dissertations

My dissertation consists of three essays on the econometric analysis of financial volatility.

My first essay is titled "The Runs Test for Volatility Forecastibility: Extensions and Comparisons with Tests for GARCH." Recently, Diebold and Christoffersen (2000) introduced a test for forecastable volatility. In this paper, I compare the size and the power of the runs test and the optimal LM test for GARCH by Monte Carlo simulation. For high frequency returns the LM test has superior power to the runs test. For low frequency returns however, the tests have very similar power. I also propose a switching variance model. For …

Dear Beyond, Kirsten Hemmy

Dissertations

My project. Dear Beyond, a collection of poetry, examines the connection between landscape—both internal and external, or private and public—and environment. My poetry reflects my own unique background and my struggles with emplacement, or the placing of oneself in any particular landscape. It aims to challenge dominant paradigms of voice, expression, and even inquiry; it questions traditional, systematic forms of inquiry such as the Cartesian idea of an essential separation between object and subject. Culture and landscape, I have discovered, manifest themselves everywhere, in variegated forms: in spaciousness or intimacy, in internal and external contexts, in tactile experiences, in focused …

Role Of Naming In Stimulus Categorization By Preschool Children, Caio Flavio Miguel

Dissertations

The purpose of the current study was to assess whether children would categorize pictures when taught the relevant listener and speaker behaviors separately. A category-sort test was used to assess emergent conditional relations. Category-sort trials consisted of looking at (Test 1) or tacting/labeling (Test 2) a samplestimulus and selecting the appropriate comparison stimuli. In Experiment 1, 4 children (3- 5 years) were taught to tact pictures of six U.S. state maps as either north or south. An assessment was conducted to determine whether they would (1) correctly categorize or sort when presented with a visual sample and (2) select the …

Differentiation Of The Causal Characteristics And Influences Of Virtual Reality And The Effects On Learning At A Science Exhibit, Arlene De Strulle Edd

Dissertations

Within the context of the informal science center, exhibits are the main interface for public learning. Essential to the success of a science center is how well exhibits model effective strategies for learning. Virtual Reality (VR) technology with its flexible, adaptive, multimedia, and immersive-learning capabilities is emerging for use by science centers in exhibits; however, research on learning in virtual environments at exhibits is scarce. To support the future development of VR science exhibits it is critical to investigate VR's pedagogical value and effects on science learning. Research investigated the Smoke & Mirrors VR exhibit at the Reuben H. Fleet …

Affine Equivariant Multivariate Rank-Based And Generalized Rank Regression, Majeda Salman

Dissertations

Affine equivariant estimates for the regression coefficient matrix of the multivariate linear model are proposed. These estimates are based on a transformation and retransformation technique that uses Tyler's (1987) M -estimator of scatter. The proposed estimates are obtained by retransforming the componentwiserank-based estimate due to Davis and McKean (1993) and a componentwise generalized rank estimate. Asymptotic properties of the estimates are established under some regularity conditions. It is shown that both estimates have a multivariate normal limiting distribution. The influence function of the retransformed generalized rank estimate has a bounded influence in both factor and response spaces. It is shown …

Counselors’ Perceptions Of The Effectiveness Of Career Education Programs In Assisting High School Students When Making Career Decisions, Sandra L. Roberts Standish

Dissertations

In 1997, the Michigan Department of Career Development unveiled the Michigan Career Preparation System, which provided guidelines and funds for school districts to offer career education opportunities for students. Since high school counselors are oftentimes viewed as the primary provider of careerinformation to students, this study examined their perceptions of Michigan's Career Preparation System and the impact this initiative has had on studentsand educators. To gather this information, a 13-question survey was designed and distributed to a randomly selected group of high school counselors. Theresearch also provided a framework for understanding all of the components of both the Michigan Comprehensive …

The Interactions Between An Orthodox Christian Worldview And Environmental Attitudes And Beliefs; For The Purpose Of Developing Better Instructional Practice In Support Of Environmental/Ecological Attitudes And Knowledge, Robert S. Keys

Dissertations

Students bring with them to the classroom a wide variety of beliefs and attitudes about the environment and its associated issues. One worldview belief structure prominently discussed in ecological discussions is the worldview of orthodox Christianity. This study uses both quantitative and qualitative measures to analyze the degree to which the orthodox Christian worldview of students influences their environmental attitudes and beliefs. Surveys were conducted with 281 undergraduate pre-service elementary teaching students enrolled in a science methods course to determine the degree to which orthodox Christian worldviews and ecological worldviews interact with one another. From this pool of students, 16 …

On Similarity Measures For Cluster Analysis, Ahmed Najeeb Khalaf Albatineh

Dissertations

This study discusses the relationship between measures of similarity which quantify the agreement between two clusterings of the same set of data. This study identifies a family [Special characters omitted.] of similarity measures which are of a special form and attain a maximum value of 1 and becomes identical when corrected for chance agreement. In particular, this study proves that the similarity measures of Rand (R), Hubert (H), and Czekanowski (CZ) are identical when corrected for chance agreement. It also proves that the measures of McConnaughey (MC) and Kulczynski (K) are identical when corrected for chance agreement. Moreover, if the …

Girls And Science: A Qualitative Study On Factors Related To Success And Failure In Science, Paula Denise Johnson

Dissertations

This qualitative study sought to determine how girls perceived factors that contribute to their success in science programs designed to maximize their achievement. The sample consisted of 20 students in 9th and 12th grades attending a school of choice. Respondents were interviewed using a structured interview protocol.

The National Council for Research on Women study (Thom, 2001) found that girls are more successful in math and science programs that incorporate acooperative, hands-on approach than in programs that stress competition and individual learning. This finding was supported by this study among 20 high school girls in a school whose mission is …

Inelastic X-Ray Scattering Studies In Lithium And Metal Ammonia Solutions, Ayman Hasan Said

Dissertations

In this work, inelastic x-ray scattering was used to measure the ionic collective excitations of a metal-ammonia system and the atomic form factor of lithium in a single crystal. For lithium and sodium ammonia systems, the measurements were carried out for different metal concentrations (lithium-ammonia with 2 0 , 16, and 13 mole percent metal [MPM] at T'=240K and sodium-ammonia with 18, 14, and 10 MPM at T=222K). These data were analyzed to determine the acoustic collective excitation dispersion relation and the linewidth. Deviations from the Bohm-Staver model for electron-ion coupling are discussed for the low electronic densities. For the …

Sustaining Innovation In Career And Technical Education, Brenda S. Clark

Dissertations

There has been little research done in education to determine what makes programs sustainable once the person who started the program has left or funding has decreased or disappeared. Innovative and successful programs are frequently started only to close or to reach a dead end. This study will seek to determine what components are necessary to sustain and grow a Career and Technical Education program. The primary audiences for the research study will be community college and university teacher preparation departments and career and technical education departments.

A survey was sent to Occupational Education Studies (OES) students and to OES …

New Techniques For Improving Biological Data Quality Through Information Integration, Katherine Grace Herbert

Dissertations

As databases become more pervasive through the biological sciences, various data quality concerns are emerging. Biological databases tend to develop data quality issues regarding data legacy, data uniformity and data duplication. Due to the nature of this data, each of these problems is non-trivial and can cause many problems for the database. For biological data to be corrected and standardized, methods and frameworks must be developed to handle both structural and traditional data.

The BIG-AJAX framework has been developed for solving these problems through both data cleaning and data integration. This framework exploits declarative data cleaning and exploratory data mining …

Non-Parametric Algorithms For Evaluating Gene Expression In Cancer Using Dna Microarray Technology, Virginie Aris

Dissertations

Microarray technology has transformed the field of cancer biology by enabling the simultaneous evaluation of tens of thousands mRNA expression levels in a single experiment. This technology has been applied to medical science in order to find gene expression markers that cluster diseased and normal tissues, genes affected by treatments, and gene network interactions. All methods of microarray data analysis can be summarized as a study of differential gene expression. This study addresses three questions, 1) the roles of selectively expressed genes for the classification of cancer, 2) issues of accounting for both experimental and biological noise, and 3) issues …

Relationship Analysis : Improving The Systems Analysis Process, Joseph Thomas Catanio

Dissertations

A significant aspect of systems analysis involves discovering and representing entities and their inter-relationships. Guidelines exist to identify entities but do not provide a rigorous and comprehensive process to explicitly capture the relationship structure of the problem domain. Whereas, other analysis techniques lightly address the relationship discovery process, Relationship Analysis is the only systematic, domain-independent analysis technique focusing exclusively on a domain's relationship structure.

The quality of design artifacts, such as class diagrams, and development time necessary to generate these artifacts can be improved by first representing the complete relationship structure of the problem domain. The Relationship Analysis Model is …

Characterization Of Ultrathin Gate Dielectrics And Multilayer Charge Injection Barriers, Edwin M. Dons

Dissertations

Since the invention of the first integrated circuit, the semiconductor industry has distinguished itself by a phenomenally rapid pace of improvements in device performance. This trend of ever smaller and faster devices is a result of the ability to exponentially reduce feature sizes of integrated circuits, a trend commonly known as "scaling". A reduction of overall feature sizes requires a simultaneous reduction in the thickness of the gate dielectric, SiO₂, of a MOSFET. Gate oxides in the ultrathin regime (<35 A) feature a large direct tunneling leakage current. The presence of this leakage current requires a reevaluation of standard characterization techniques as well as a reevaluation of the continued usefulness of SiO₂ as the gate dielectric of choice for future applications. On the other hand, a thorough understanding of …