Digital Commons Network^™

Investigating The Transition Process When Moving From A Spiral Curriculum Alignment Into A Field-Focus Science Curriculum Alignment In Middle School, Randi Kay Alwardt

Dissertations

This investigation examined the transition from a spiral science curriculum to a field-focus science curriculum in middle school. A spiral science curriculum focuses on a small part of each field of science during each middle school year, more of a general science concept. In contast to that, the base of a field-focus curriculum is that each grade level focuses on a specific field of science, more of a high school like concept. The literature reviewed provides a history of science education, the steps of the change process, and the importance of professional development. The literature review provided a basis for …

Comparing Differences In Math Achievement And Attitudes Toward Math In A Sixth Grade Mathematics Enrichment Pilot Program, Tamara Tow

Dissertations

High-stakes assessments have encouraged educators to ignore the needs of the top performers. Therefore, the Oakwood School District decided to implement a mathematics pilot enrichment program in order to meet the needs of the advanced mathematics students. As a result, this study used quantitative data to determine if there was a significant change in the academic achievement and attitudes over the course of the year of sixth-grade students in the enrichment math pilot program. The curriculum for the pilot program centered on the same topics as the regular program, however, it involved more application of the basic concepts and of …

Predictors Of Mathematics Majors At The Post-Secondary Level Of Education, Megan L. Reineke

Dissertations

While there are numerous studies examining the courses students take at the secondary level and how different levels of mathematics courses can affect student achievement in beginning post-secondary mathematics courses, there are no studies that examine math majors at the post-secondary level of education. In addition, many reports stating gender and ethnicity gaps in the field of mathematics fail to discuss the issue surrounding what type of student pursues a mathematics degree. Understanding mathematics majors, including the types of high schools they attended and their ethnicities, may provide some insight into which students are becoming interested in the area of …

A+Nywhere Learning System Comparative Analysis Of Direct Instruction And Online Learning Using The A+Nywhere Learning System In A Secondary Alternative High School, Patricia Mary Lee

Dissertations

In 2010, the problem of high school students dropping out of high school continues to plaque school districts across the United States. All students can learn when provided with opportunity, ample support systems, and encouragement to succeed. In this mixed methods study, the researcher investigated whether utilizing an online curriculum instead of direct instruction was an effective instructional tool for at-risk high school students attending an alternative high school. After the 2008–2009 school year, teaching methods at the participating high school were changed from direct instruction school to the A+nyWhere Learning System (A+LS) for communication arts, math, science, social studies, …

Risk Based Models For The Optimization Of Oil And Gas Supply Chain Critical Infrastructure, Kingsley Oseloka Achebe

Dissertations

The oil and gas sector faces a broad array of risks and uncertainties, affecting short- and long-term planning, and causing adverse effects in the energy sector. To predict and minimize them, risk based supply chain models were developed for the oil and gas supply chain critical infrastructure.

First, the events and activities were categorized as short term and long term, and their risk ratings derived, by analyzing data from past events and site visits. The result showed that events like the Israel – Arab war, successful hurricane, and production increase or decrease, had a risk rating of approximately 7.

Second, …

Modeling Of Equilibrium Point Trajectory Control In Human Arm Movements, Kai Chen

Dissertations

The underlying concept of the Equilibrium Point Hypothesis (EPH) is that the CNS provides a virtual trajectory of joint motion, representing spacing and timing, with actual movement dynamics being produced by interactions of limb inertia, muscle viscosity and speed/position feedback from muscle spindles. To counter criticisms of the EPH, investigators have proposed the use of complex virtual trajectories, non-linear damping, stiffness and time varying stiffness to the EPH model. While these features allow the EPH to adequately produce human joint velocities, they conflict with the EPH’s premise of simple pre-planned monotonic control of movement trajectory. As a result, this study …

Factors That Impact Seat Belt Usage And Injury Severity Of Belted Front Seat Occupants, Siri Konje Lawrencia Nukenine

Dissertations

Factors influencing seat belt usage have been extensively researched in the safety analysis literature. Most of this research has focused on factors that influence seat belt usage for a driver and front seat passenger in a vehicle. Few research studies have investigated factors that impact seat belt usage for back seat occupants. This research investigates the factors associated with seat belt usage for front-seat as well as backseat occupants of vehicles in the state of New Jersey. Using logistic regression, seat belt usage models were developed to examine the contribution of several variables on seat belt usage for five vehicle …

Study Of Mechanisms Of Phytotoxicity Of Alumina Nanoparticles, Anthony Elijius

Dissertations

Plant growth inhibitory effect of alumina nanoparticles has recently been reported (Ling Y, Watts D, 2004) but the mechanisms of such an effect are yet to be established. The phytotoxicity of aluminum and some of its compounds is well known, but the rapid expansion of nanotechnology resulting in the introduction of new sets of materials in the nanometer range has led to the development of new approaches, experimental methods and modes of investigation.

In this study, the observed phytotoxic effects of alumina nanoparticles suspension on five plant species (Zea mays, Cucumis sativus, Daucus carota, Brassica oleracea, Lactuca sativa) …

A Molecular Dynamics Simulation Based Principal Component Analysis Framework For Computation Of Multi-Scale Modeling Of Protein And Its Interaction With Solvent, Tao Wu

Dissertations

This dissertation presents a new computational framework for calculating the normal modes and interactions of proteins, macromolecular assemblies and surrounding solvents. The framework employs a combination of molecular dynamics simulation (MD) and principal component analysis (PCA). It enables the capture and visualization of the molecules' normal modes and interactions over time scales that are computationally challenging. It also provides a starting point for experimental and further computational studies of protein conformational changes.

A protein's function is sometimes linked to its conformational flexibility. Normal mode analysis (NMA) and various extensions of it have provided insights into the conformational fluctuations associated with …

Modeling Of Magnetic Field Driven Simultaneous Assembly, Rene David Rivero

Dissertations

The Magnetic Field Driven Simultaneous Assembly (MFDSA) is a method that offers a non-statistical and deterministic solution to the problem of assembly via batch processing; a hybrid of serial and parallel processing. The technique requires the use of electromagnets as well as soft and hard magnetic materials that are applied to devices and recesses respectively. The MFDSA approach offers the ability to check and correct errors in real-time and is capable of scalable, versatile, and high-yield integration.

Devices, coated with a layer of soft magnetic material, are moved from initial to final positions along predetermined pathways through the action of …

Face Recognition Using Multiple Features In Different Color Spaces, Zhiming Liu

Dissertations

Face recognition as a particular problem of pattern recognition has been attracting substantial attention from researchers in computer vision, pattern recognition, and machine learning. The recent Face Recognition Grand Challenge (FRGC) program reveals that uncontrolled illumination conditions pose grand challenges to face recognition performance. Most of the existing face recognition methods use gray-scale face images, which have been shown insufficient to tackle these challenges. To overcome this challenging problem in face recognition, this dissertation applies multiple features derived from the color images instead of the intensity images only.

First, this dissertation presents two face recognition methods, which operate in different …

Underwater Communication Via Particle Velocity Channels : Principles, Channel Models, And System Design, Huaihai Guo

Dissertations

A vector sensor is capable of measuring important non-scalar components of the acoustic field such as the particle velocity, which cannot be obtained by a single scalar pressure sensor. In the past few decades, extensive research has been conducted on the theory and design of vector sensors. On the other hand, underwater acoustic communication systems have been relying on scalar sensors only, which measure the pressure of the acoustic field. By taking advantage of the vector components of the acoustic field, such as the particle velocity, the vector sensor can be used for detecting the transmitted data. In this dissertation, …

Design Of Single-Carrier Frequency Domain Equalization (Sc-Fde) With Transmit Diversity For Wireless And Optical Communications, Kodzovi Acolatse

Dissertations

As the demand of wireless service is rising, there is a need to transmit high-speed packets over the wireless communication channel. Broadband data transmission over wireless channels commonly faces the challenges of multipath fading channels, which are both time and frequency selective. There is then a need to design transmission techniques that can combat the adverse effects of the channel, and enable reliable high data rate wireless services. Orthogonal frequency division multiplexing (OFDM) has become widely accepted primarily because of its robustness against frequency selective fading channels, but it suffers a number of drawbacks such as high peak-to-average power ratio …

Pattern Formation In Oscillatory Systems, Hui Wu

Dissertations

Synchronization is a kind of ordinary phenomenon in nature, the study of it includes many mathematical branches. Phase space is one of the most powerful inventions of modern mathematical science. There are two variables, the position and velocity, that can describe the 2-dimensional phase space system. For example, the state of pendulum may be specified by its position and its velocity, so its phase space is 2-dimensional. The state of the system at a given time has a unique corresponding point in the phase space. In order to describe the motion of an oscillator, we can talk about its motion …

Application Of Mass/Stiffness Eccentricity To Control Response Of Structures Subjected To Earthquake Ground Motion, Bakhtiar Feizi

Dissertations

This dissertation is driven by the concept that engaging more modes in the response of structures can be used to mitigate its translational dynamic response. One such an approach is to engage torsional modes through engineered eccentricity (mass/stiffness eccentricity), thus, introducing coupled translation-rotation response. This idea was first introduced in a paper published by MacBain and Spillers in 2004. As a follow up to the same idea this dissertation was an attempt to investigate and develop the theory concerning the application of mass/stiffness eccentricity to control the translational motion of structures subjected to earthquake ground motion.

Different discrete and continuous …

Radio-Derived Three-Dimensional Structure Of A Solar Active Region, Samuel D. Tun

Dissertations

Solar active regions are the source of the most violent events observed on the Sun, some of which have a direct impact to modern civilization. Efforts to understand and predict such events require determination of the three-dimensional distributions of density, temperature, and magnetic fields above such active regions. This thesis presents the structure of the solar atmosphere above active region AR 10923, observed on 2006 Nov 10, as deduced from multi-wavelength studies including combined microwave observations from the Very Large Array (VLA) and the Owens Valley Solar Array (OVSA). The VLA observations provide excellent image quality at a few widely …

Distributed Synchronization Algorithms For Wireless Sensor Networks, Nicola Varanese

Dissertations

The ability to distribute time and frequency among a large population of interacting agents is of interest for diverse disciplines, inasmuch as it enables to carry out complex cooperative tasks. In a wireless sensor network (WSN), time/frequency synchronization allows the implementation of distributed signal processing and coding techniques, and the realization of coordinated access to the shared wireless medium. Large multi-hop WSN's constitute a new regime for network synchronization, as they call for the development of scalable, fully distributed synchronization algorithms. While most of previous research focused on synchronization at the application layer, this thesis considers synchronization at the lowest …

Model Reference Control For Ultra-High Precision Positioning Systems, Lan Yu

Dissertations

Due to the increasing demands of high-density semiconductors, molecular biology, optoelectronics, and MEMS/NEMS in the past decades, control of ultra-high precision positioning using piezoelectricity has become an important area because of its high displacement resolution, wide bandwidth, low power consumption, and potential low cost. However, the relatively small displacement range limits its application. This work proposed a practical ultra-high precision piezoelectric positioning system with a complementary high displacement range actuation technology. Solenoids are low cost, high speed electromagnetic actuators which are commonly used in on-off mode only because of the inherent high nonlinear force-stroke characteristics and unipolar forces (push/pull) generated …

Vibration Based Technique For Monitoring The Postbuckling Deformation, Bashir Mustafa Ali

Dissertations

Structural health monitoring (SHM) is a technology whose objective is to detect damage growth in metallic and composite structural elements long before they reach critical dimensions. Most structural health monitoring approaches that have been developed in the past have confined their attention to material degradation such as cracks in metals and delaminations in composite materials. Buckling instability is another cause of catastrophic failure commonly seen in engineering structures. The objective of this study is to develop a technique capable of detecting the onset of buckling instability in structural members and assessing the margin of safety from final collapse. The technique …

A Study Of Grade Level And Gender Differences In Divergent Thinking Among 8th And 11th Graders In A Mid-Western School District., Leah Christine Roue

Dissertations

No abstract provided.

Spectroscopic Study Of New Sensors For Organophosphates, Metals, And Cyanide Based On Rhodamine And Cholic Acid Derivatives, Arambe Gedara Aruna Weerasinghe

Dissertations

Despite the increasing interest in developing sensors for nerve gas agents, efficient detection remains challenging. Among the various sensors developed so far, fluorescence sensors play an important role due to their simplicity. We developed six new rhodamine-based compounds that can be used as fluorescent turn-on sensors. Compound 1 and 3 gave high fluorescent enhancement with diethyl chlorophosphate (DCP) compared to the other compounds. Very high selectivity and sensitivity were observed as these compounds did not show significant fluorescent enhancement with dimethyl methylphosphonate (DMMP), HC1 and transition metal ions. The potential sensor can be used in solution as well as on …

Electron Transmission Characteristics And The Production Of Narrow Beams Using Glass Optics, Buddhika Senarath Dassanayake

Dissertations

Transmission of electrons through an insulating single cylindrically-shaped glass capillary of microscopic dimension has been investigated. Samples made with Borosilicate glass (PYREX 7740) were subjected to bombardment of 300-1000 eV electrons. Transmitted electrons were analyzed using a parallel-plate spectrometer coupled to a channel electron multiplier.

The transmitted electron intensity was found to decrease with increasing sample tilt angle relative to the direction of the primary beam. Two regions of transmission were found: direct where there is no interaction of the beam with the inner capillary wall, and indirect where the beam does interact with the wall. The rate of transmission …

Global Distributive Justice After Rawls: A Modified Poggean Argument For How We Harm The World's Poorest, Mark Chakoian

Dissertations

This work presents an analysis of Thomas Pogge's approach to the problem of world poverty as presented in World Poverty and Human Rights. It begins by situating the project of Pogge relative to the work of his predecessor John Rawls. It then moves on to compare Pogge's negative-duty approach to more common positive-duty approaches by discussing the relative merits and weaknesses of the approach of Peter Singer to the problem of poverty. The remaining chapters give an in-depth analysis of Pogge's argument itself. Although there are significant holes and inconsistencies in Pogge's approach, a reformulated argument that preserves his original …

Images Of God, Imago Dei And God's Relationship With Humanity Through The Image Of Mary's Breast Milk: A Focus Upon Sor María Anna Águeda De San Ignacio (1695-1756), Neomi Dolores Deanda

Dissertations

This dissertation presents an original contribution to the academic field of Theology, specifically Constructive Theology, because it begins the retrieval work of a woman's voice from seventeenth and eighteenth century Mexico, an entire area of historical and theological thought which has been globally under-explored. Analysis of María Anna Águeda de San Ignacio's eighteenth century original publications give a glimpse into this woman's official authority during her time, which also presents a historical woman's voice who has held ecclesial authority.

This project engages María Anna Águeda de San Ignacio's work to draw theological insights and further expand understandings about notions of …

Neighborhood Sum Parameters On Graphs, Frank Allen O'Neal

Dissertations

No abstract provided.

Bit Error Rate Locked Loops Using Log-Likelihood Error Correction Decoders, Eric Rives

Dissertations

No abstract provided.

Thermal Diffusivity Determination In Sn-Based Lead-Free Solder Alloys, Manijeh Mohammad Alipour

Dissertations

No abstract provided.

A Proposed New Model To Understand Lean Implementation Using Employee Perception, Sushil Kumar Shetty

Dissertations

No abstract provided.

Designing A Middle School Gifted Education Program Of Excellence Using Current Gifted Programming Models, Samantha Ann Miller

Dissertations

In 2004, the National Association for Gifted Children and the National Middle School Association collaborated to create a joint position statement supporting the educational needs of all middle school students, including those of high potential and ability. Since the creation of this position statement, research demonstrates that little has been done to further the understanding and development of middle school gifted adolescents and corresponding educational programming that meets the gifted adolescents’ needs. This study sought to provide clarity concerning the organization of middle school gifted programming and the components that contribute to the excellence of programs according to the perceptions …

The Relationship Between Caring School Community Program Implementation And Elementary Student Achievement, Michelle R. Wilkerson

Dissertations

This program evaluation of Caring School Community was conducted by two educators who studied the implementation of this character education program in an elementary school. In an effort to foster a culture of respect and kindness, where students, staff, and parents are treated as valued, contributing members of the school community, an elementary school implemented a character education program called Caring School Community. The purpose of this study was to evaluate the success of the implementation of Caring School Community and its possible impact on student achievement. The evaluation of this program involved observing classroom instruction to track student engagement, …