Digital Commons Network^™

Drinking Water Disinfection By-Products Detection, Formation And The Precursors Removal Study, Runmiao Xue

Doctoral Dissertations

"Haloacetic acids (HAAs) and trihalomethanes (THMs) are two groups of commonly found disinfection by-products (DBPs). Iodinated THMs and HAAs were observed after disinfection of water containing high level of iodide and are proved to be more toxic than their corresponding chlorinated and brominated species. In the presented dissertation, a novel rapid and sensitive high performance ion chromatography-tandem mass spectrometry (HPIC-MS/MS) method has been developed for simultaneous analysis of all these HAAs, bromate, bromide, iodide, and iodate, seventeen compounds in total, without any tedious sample preparation. Besides an efficient analytical method for the detection of DBPs, seeking for a green disinfectant …

T-Closed Sets, Multivalued Inverse Limits, And Hereditarily Irreducible Maps, Hussam Abobaker

Doctoral Dissertations

"This dissertation consists of three subjects: T-closed sets, inverse limits with multivalued functions, and hereditarily irreducible maps.

For a subset A of a continuum X define T(A) = X \ {x ∈ X : there exists a subcontinuum K of X such that x ∈ int_xX(K) ⊂ K ⊂ X \ A}. This function was defined by F. Burton Jones and extensively investigated in the book [20] by Sergio Macias. A subset A of a continuum X is called T-closed set if T(A) = A. A characterization of T-closed set is given using generalized …

Imaging A Fly Ash Landfill Using Non-Invasive Technologies (Ert And Masw), Atiat Shaban Qasim Alsaaideh

Doctoral Dissertations

"Electrical resistivity tomography (ERT) data were acquired across a segment of an existing fly ash landfill in southwestern Missouri. The objective was to map potential karst features and identify probable groundwater seepage through and beneath the landfill.

Variations in the moisture content were mapped below and above the two liners (clay and synthetic) systems, the soil and bedrock. Seepage pathways were mapped through the fly ash and the underlying soil and rock. No visual evidence was found on any of the 3D ERT profiles of the presence of either pre-existing air-filled voids or pre-existing or newly infilled clay-filled voids. There …

Discrete Ordinates Ct Organ Dose Simulator (Doctors), Edward T. Norris

Doctoral Dissertations

"Computed tomography (CT) has become pervasive in medical diagnostics as improved imaging techniques and processing algorithms provide higher quality information to doctors. However, the exponentially increasing usage of CT has raised concerns regarding long term low-dose radiological risks.

Currently, the dose to patients is computed using Monte Carlo methods and experimental tests. In other areas of radiation transport, deterministic codes have been shown to be much faster than Monte Carlo codes.

Currently, no deterministic methodology exists to automatically generate a spatially distributed dose profile from a CT voxel phantom. This work proposes a new code, Discrete Ordinate CT Organ Dose …

Advanced Analytical Strategies To Determine Biomedical Parameters For Medical Diagnostics, Drug Delivery, And Therapy, Sisi Chen

Doctoral Dissertations

"Biomedical parameters are critical for diseases prognosis, diagnosis and therapy. Many research groups have dedicated their studies to develop analytical instrumentation and apply analytical methods to determine biomedical parameters that have the potential to help with disease control and increase public health. This dissertation focuses on three major aspects of analytical strategies development and applications: 1) detection of pH changes caused by nanotoxicity (induced by TiO₂ nanoparticles) using newly developed micro-pH sensor, 2) quantification of renal cell carcinoma (RCC) biomarkers by high-performance liquid chromatography - tandem mass spectrometry (HPLC-MS/MS), and 3) nuclear magnetic resonance (NMR) studies of porous wall …

Quantitative Dependability And Interdependency Models For Large-Scale Cyber-Physical Systems, Koosha Marashi

Doctoral Dissertations

"Cyber-physical systems link cyber infrastructure with physical processes through an integrated network of physical components, sensors, actuators, and computers that are interconnected by communication links. Modern critical infrastructures such as smart grids, intelligent water distribution networks, and intelligent transportation systems are prominent examples of cyber-physical systems. Developed countries are entirely reliant on these critical infrastructures, hence the need for rigorous assessment of the trustworthiness of these systems. The objective of this research is quantitative modeling of dependability attributes -- including reliability and survivability -- of cyber-physical systems, with domain-specific case studies on smart grids and intelligent water distribution networks. To …

Survivability Modeling For Cyber-Physical Systems Subject To Data Corruption, Mark James Woodard

Doctoral Dissertations

"Cyber-physical critical infrastructures are created when traditional physical infrastructure is supplemented with advanced monitoring, control, computing, and communication capability. More intelligent decision support and improved efficacy, dependability, and security are expected. Quantitative models and evaluation methods are required for determining the extent to which a cyber-physical infrastructure improves on its physical predecessors. It is essential that these models reflect both cyber and physical aspects of operation and failure. In this dissertation, we propose quantitative models for dependability attributes, in particular, survivability, of cyber-physical systems. Any malfunction or security breach, whether cyber or physical, that causes the system operation to depart …

Control Of Single- And Dual-Probe Atomic Force Microscopy, Muthukumaran Loganathan

Doctoral Dissertations

“Atomic force microscope (AFM) is one of the important and versatile tools available in the field of nanotechnology. It is a type of probe-based microscopy wherein an atomically sharp tip, mounted on the free end of a microcantilever, probes the surface of interest to generate 3D topographical images with nanoscale resolution. An integral part of the AFM is the feedback controller that regulates the probe deflection in the presence of surface height changes, enabling the control action to be used for generating topographical image of the sample. Besides sensing, the probe can also be used as a mechanical actuator to …

Data Analysis And Application Guidelines Of Particle Gel Treatments, Yue Qiu

Doctoral Dissertations

“Water production is a severe worldwide issue in mature oilfields, which results in shortening the economic life of oil and gas wells. Particle gel have been widely applied in mature oilfields to improve reservoir sweep efficiency and control water production. To date, more than 10,000 injection wells were successfully treated by particle gels. However, considerable uncertainty still exists regarding to where and how particle gel treatments can be best applied.

The main objective of this study is to provide application guidelines and prediction model for particle gel treatments through data analysis. In this study, four particle gel treatment datasets have …

Perceptions And Practices Of Administrators And Teachers In Jesuit Secondary Schools In The Hazaribag Province Of India Regarding Ideal Ignatian Educators, Vincent Hansdak

Doctoral Dissertations

The growing number of complex learning contexts and needs of students has challenged the quality of education at all levels. The need to offer the most satisfactory and meaningful education to all students consistently attracts researchers, policymakers, and educators to comprehensively understand what comprises successful learning, and in particular, what qualities do effective teachers have around the world. Though some developed countries have made significant progress toward quality education, many developing countries experience numerous obstructions to guaranteeing quality education to students. Most importantly, India, due to its economic, cultural, and social divides, still grapples with equity and the quality of …

Effects Of A Counseling Program On First-Generation High-School Student Aspirations, Self-Efficacy, Perceived Barriers, Knowledge Of The College-Application Process, And Course Selection, Edress Waziri

Doctoral Dissertations

The benefits of a college degree are clear. Those with a college education are more likely to participate effectively in the governance of the nation, contribute their time and resources to the community, depend less on government services, and engage in fewer crimes (Institute for Higher Education Policy, 1998). According to the literature, the parents’ level of education is a major indicator in determining whether a student completes a 4-year college degree (Perna & Titus, 2005). First-generation students are far less likely to gain admission and complete a degree from a 4-year university, in comparison to non-first-generation students (Tinto, 2006). …

Differentiating Literacy Instruction For Digital Learners: The Effect Of Multimedia Think-Aloud Worked Examples On Adolescent Analytical Reading Comprehension, Diana Combs Neebe

Doctoral Dissertations

Learning by example is nothing new to the education landscape. Research into think-aloud protocols, though often used as a form of assessment rather than instruction, provided practical, content-specific literacy strategies for crafting the instructional intervention in this study. Additionally, research into worked examples—from the earliest pen-and-paper studies of algebra and statistics, to more recent multimedia studies of legal reasoning and writing—shaped the conceptual framework for the present study by detailing a series of design principles for effective multimedia worked examples. This study aimed to reimagine the face-to-face, teacher-facilitated think-aloud as a multimedia worked example, which could be leveraged for differentiated, …

The Effects Of Gender-Aware Leadership-Development Training On The Leadership- Behavioral Competencies Of Women Software Engineers In California’S Silicon Valley, Leann Pereira

Doctoral Dissertations

This study was conducted to investigate the effects of a leadership-development training workshop on leadership behaviors among women software engineers in a California Silicon Valley engineering community with a two-phase, mixed-methods research design. The training workshop was developed using a framework for developing leadership-behavioral competencies among women (LBCW), which was congruent with theoretical principles for women’s leadership development.

LBCW was comprised of four competencies: self-advocacy, social networking, psychological capital, and goal orientation. A pretest–posttest comparison-group design was used to assess the effects of the training on LCBW among 70 participants with four instruments: the Leadership Development and Activities Instrument, the …

Writing-To-Learn In High-School Chemistry: The Effects Of Using The Science Writing Heuristic To Increase Scientific Literacy, Denae Nurnberg

Doctoral Dissertations

Writing-to-Learn in High-School Chemistry: The Effects of Using the Science Writing Heuristic to Increase Scientific Literacy

The purpose of this study was to investigate the effectiveness of using the Science Writing Heuristic (SWH) as an instructional tool to improve academic achievement and writing in the context of scientific literacy. This quasi-experimental study compared the effects of using the SWH in five laboratory settings over a 16-week span. The SWH was administered to a treatment group (n=63), whereas the comparison group (n=67) received laboratory sessions using a traditional laboratory report format.

There were four classes (n=130) of general chemistry enrolled in …

Social Loafing Construct Validity In Higher Education: How Well Do Three Measures Of Social Loafing Stand Up To Scrutiny?, Jacquelyn Deleau

Doctoral Dissertations

The purpose of this study was to examine the construct validity of social loafing using convergent and discriminant validity principles. Three instruments that purport to measure social loafing were factor analyzed: A ten-item instrument by George (1992), a 13-item instrument by Mulvey and Klein (1998), and a 22-item instrument by Jassawalla, Sashittal, and Malshe (2009) for a total of 45 items that were compiled into a single instrument with which data were collected, correlated, and factor analyzed.

One hundred and sixty graduate and undergraduates enrolled in management courses at a small private Northern California university were surveyed. Thirteen classes were …

Exploring The Experiences Of Black Men As Respondents In University Student Conduct Processes, Brian Arao

Doctoral Dissertations

Student conduct processes in higher education have been studied and theorized extensively from a structural perspective, yielding a wealth of guidance for practitioners on how they can best design and administer disciplinary interventions (e.g., Lancaster & Waryold, 2008b). However, very little published research has focused on students' perceptions of and experiences with student conduct processes, and to what extent these are congruent with the espoused learning goals of student conduct practitioners (Dannells, 1997; Karp & Sacks, 2014; Stimpson & Stimpson, 2008). Among these scant studies, the findings of King (2012) and Karp and Sacks (2014) suggest that Black men may …

Relative Importance Of Anxiety And Motivational Variables In Predicting Language Achievement For College Learners Of Chinese, Qi Wang

Doctoral Dissertations

The growing worldwide enthusiasm in learning Chinese calls for more research on learner characteristics in Chinese classrooms to better inform teaching practice. Language anxiety, which falls under the umbrella of learner’s affect, is considered an important affective aspect that negatively influences language learning and acquisition. As research on language anxiety mainly focused on the learning of Western languages, this study constitutes an initial attempt to investigate anxiety in the learning of Chinese through the testing of a structural model. The purpose of the study was to examine the relative importance of language anxiety in predicting Chinese achievement when motivation, integrativeness, …

Community Members' Perspectives On The Thurgood Marshall Academic High School Riot: A Case Study Of The Effects Of Embedded Law Enforcement In High School, Kim-Shree Maufas

Doctoral Dissertations

Despite studies by legal and social-justice organizations pointing to connections between school-based police referrals and arrests that lead youth (particularly of color) into the juvenile-justice courts and criminal courts and are funneling students of color into the school-to-prison pipeline, schools increasing use school resource officers (SROs) in programs on K-12 campuses. Much of the academic literature about SROs in schools highlight the rationale for placing programs in urban schools from the perspectives of policymakers, legislators, members of the juvenile- and criminal-justice systems, and school district officials. Limited scholarly work documents the voices of impacted members of school communities (educators, students, …

Lipid-Based Self-Assembled Nps: The Effects Of Morphology And Targeting Molecules On The Cellular Uptake Using In Vitro Tumor Model, Wafa Aresh

Doctoral Dissertations

While the usage of nanoscale materials for therapeutics and diagnostics is growing rapidly, there remain many challenges to understanding the expected controlling parameters (e.g., size, shape and chemical properties) that significantly affect the performance of the nanomaterials due to complicated in vivo environments. Therefore, a strong interest in the knowledge of the nano–biointeractions and how they contribute to tissue accumulation has been developed. To date, researchers have relied on monolayer cell cultures and animal models to study such nano–biointeractions. However, currently, there is a big gap between the result of the over-simplified in vitro cell response and the complex animal …

Short Branch Attraction, The Fundamental Bipartition In Cellular Life, And Eukaryogenesis, Amanda A. Dick Phd

Doctoral Dissertations

Short Branch Attraction occurs when BLAST searches are used as surrogate for phylogenetic analysis. This results from branch length heterogeneity. The short branches, not the long, are attracting.

The root of cellular life is on the bacterial branch, meaning the Archaea and eukaryotic nucleocytoplasm form a clade. This split, the realm, is the first in the cellular tree of life. I name the clade containing the Archaea and eukaryotic nucleocytoplasm the Ibisii based on shared characteristics involved in information processing and translation. The Bacteria are members of the other realm, the Bacterii.

Eukaryogenesis is the study of how the Eukarya …

A High Level Framework For Solver Independent Model Manipulation And Generation Of Hybrid Solvers, Daniel Fontaine

Doctoral Dissertations

Many critical real world problems, including problems in areas such as logistics, routing and scheduling are very difficult to solve computationally (often NP-hard). Various programming and algorithmic paradigms have been developed to deal with these problems, including Constraint Programming (CP), Integer Programming (IP) and Local Search (LS). These technologies are largely declarative in nature and rely on vastly different underlying mathematical and algorithmic approaches. Hence, each paradigm has inherent strengths and weaknesses making it more or less suitable to a given problem. For particularly difficult problems, it can often be beneficial to leverage a sophisticated “hybrid solver” technique. Such techniques …

Mixed-Integer Optimization Problems With Applications To Manufacturing Scheduling And Distributed Energy System Operation, Bing Yan

Doctoral Dissertations

Archival abstract submitted

An Efficient Solution Methodology For Mixed-Integer Programming Problems Arising In Power Systems, Mikhail Bragin

Doctoral Dissertations

For many important mixed-integer programming (MIP) problems, the goal is to obtain near-optimal solutions with quantifiable quality in a computationally efficient manner (within, e.g., 5, 10 or 20 minutes). A traditional method to solve such problems has been Lagrangian relaxation, but the method suffers from zigzagging of multipliers and slow convergence. When solving mixed-integer linear programming (MILP) problems, the recently adopted branch-and-cut may also suffer from slow convergence because when the convex hull of the problems has complicated facial structures, facet-defining cuts are typically difficult to obtain, and the method relies mostly on time-consuming branching operations. In this thesis, the …

Population And Trophic Dynamics Of Striped Bass And Blueback Herring In The Connecticut River, Justin P. Davis

Doctoral Dissertations

Case studies of the ramifications of predator management for prey population dynamics can play a valuable role in developing ecosystem fisheries management. My dissertation focuses on the predator-prey interaction between Striped Bass (Morone saxatilis), an abundant predatory finfish, and an imperiled prey population of anadromous Blueback Herring (Alosa aestivalis). Annual returns of Blueback Herring to the Holyoke Dam on the Connecticut River in southern New England collapsed during the 1980-2000s, coincident with Striped Bass recovery. I studied the abundance and demography of both species in the Connecticut River during 2005-08, measured predation levels, and surveyed the …

The Interaction Of Mercury And Methylmercury With Reduced Sulfur: Implications For The Transformation Of Mercury And Methylmercury In The Environment, Nashaat M. Mazrui

Doctoral Dissertations

Archival abstract submitted

Predictive Modeling Of A Two-Stage Gearbox Towards Fault Detection, Edward J. Diehl

Doctoral Dissertations

This research presents a systematic approach to health monitoring using dynamic gearbox models (DGM) and the harmonic wavelet transforms (HWT) for vibration response analysis. A comprehensive DGM is developed, the model parameters are identified through correlated numerical and experimental investigations, and HWT analysis is performed to illustrate the fault detection and diagnosis procedure and capability of this approach. The model fidelity is validated first by spectrum analysis, using constant speed experimental data, and secondly by HWT analysis, using non-stationary experimental data. The comparison confirms that both the frequency content and the predicted, relative response magnitudes match with physical measurements. Model …

Detecting Conceptual Change With Latent Transition Analysis, Glen Davenport

Doctoral Dissertations

To uphold the core premise of cognitive diagnostic assessment, it is necessary to align different aspects of assessment design. The structure of the test, the measurement model, and the score reporting must align with each other and with the construct being targeted. Conceptual knowledge, as targeted by the Force and Motion Conceptual Evaluation (FMCE), can be modeled as a set of overlapping categorical states. As such, latent class analysis (LCA) is the most appropriate measurement model—where students have a probabilistic membership within classes that tend to match with observed mental models.

This dissertation focuses on one particular application of conceptual …

Co-Operative Collective Motion Of Benzoquinone Particles At The Air-Water Interface And Assessment Of Cd62l As A Protein Biomarker For Metastatic Bladder Cancer, Jennifer E. Satterwhite 4469944

Doctoral Dissertations

Active matter is an entity observed in both animate and inanimate systems and exhibits spontaneous movement. An internal mechanism generates the self-driven unit to convert potential energy into mechanical movement. Biomotors and organisms are biologically well-known active systems; however, their movements are quite a complex phenomenon and understanding their driving motive forces and thermodynamic principles are essential. Therefore, the first portion of this thesis focused on the dynamics of an active multiple particle system at the air-water interface.

Benzoquinone active particles were studied and remarkable locomotion phenomena were observed at the air-water interface. Self-motion was evaluated with multiple symmetric circular …

Anxiolytic Effects Of Propranolol And Diphenoxylate On Mice And Automated Stretch-Attend Posture Analysis, Kevin Scott Holly

Doctoral Dissertations

The prevention of social anxiety, performance anxiety, and social phobia via the combination of two generic drugs, diphenoxylate HC1 (opioid) plus atropine sulfate (anticholinergic) and propranolol HCl (beta blocker) was evaluated in mice through behavioral studies. A patent published on a September 8, 2011 by Benjamin D. Holly, US 2011/0218215 Al, prompted the research. The drug combination of diphenoxylate and atropine plus propranolol could be an immediate treatment for patients suffering from acute phobic and social anxiety disorders. Demonstrating the anxiolytic effects of the treatment on mice would validate a mouse model for neuroscientist to be used to detect the …

Generalized Partial Directed Coherence And Centrality Measures In Brain Networks For Epileptogenic Focus Localization, Joshua Aaron Adkinson

Doctoral Dissertations

Accurate epileptogenic focus localization is required prior to surgical resection of brain tissue for treatment of patients with intractable temporal lobe epilepsy, a clinical need that is partially fulfilled to date through a subjective, and at times inconclusive, evaluation of the recorded electroencephalogram (EEG). Using brain connectivity analysis, patterns of causal interactions between brain regions were derived from multichannel EEG of 127 seizures in nine patients with focal, temporal lobe epilepsy (TLE). The statistically significant directed interactions in the reconstructed brain networks were estimated from three second intracranial multi-electrode EEG segments using the Generalized Partial Directed Coherence (GPDC) and validated …