Digital Commons Network^™

Fabrication, Characterization And Application Of Zinc Oxide And Zinc Magnesium Oxide Nanostructures, Abdiel Rivera

Doctoral Dissertations

Zinc oxide is a wide bandgap semiconductor with relatively large exciton energy of 60 meV, and longitudinal optical phonon energy of 72 meV. ZnO can be grown in any nanostructure (nanoribbons, nanowires, nanorods, films, core-shell, among others), under any growth condition (metal-organic chemical vapor deposition (MOCVD), molecular beam epitaxial (MBE), hydrothermal, radio-frequency sputtering, sonochemical, etc) to be implemented in a variety of applications. For instance, by adding Mg to ZnO, the energy band separation increases and shift to a lower wavelength. Using ZnMgO, in the form of vertical nanowires, can improve the resolution of solar-blind UV-detectors. Nevertheless, the sol-solubility of …

Improving Discharge Medication Education On A Sepsis Unit: A Quality Improvement Project, Kayla Melton, Maria Noguez, Fabiola Lopez, Jillian Eisenberg, Deanna Lee

Master's Projects and Capstones

Ineffective discharge education plays a role in increased readmission rates, adverse drug events, and worsened patient outcomes post-hospitalization. When combined, the resulting financial burden on America’s healthcare system is exorbitant, as is the physical and mental toll on unsuspecting patients. To close the current gaps in discharge teaching, this project is incorporating the teach-back method and utilizing updated medication handouts.

Starting on the sepsis unit of a large, local medical center – the Clinical Nurse Leader (CNL) interns employed assessment tools to identify areas for improvement. The data revealed rushed, incomprehensive discharge medication education and reflected in low HCAHPS scores …

From Muhammed To The Jobup: Engaging Malemployed Immigrants Through Journalism, Tiziana Rinaldi

Capstones

I focused my graduate work on the local community of malemployed immigrants. They are foreign-educated newcomers — medical doctors, pharmacists, teachers, lawyers and engineers, to name a few of their professions — who lack the resources to find skill- appropriate work in the U.S. They end up either unemployed or working at "jobs for which they’re overqualified or overeducated or both,” I wrote for NJSpotlight in 20171.

Using the social journalism method2 of engaging members of a chosen group to fill important if not crucial information gaps, I developed The JobUp, a series of free, offline educational events, as my …

The Best Management Practices For Addressing Human-Caused Riparian And Wetland Degradation, Aldo Lopez

Master's Projects and Capstones

Riparian and wetland ecosystems accomplish a variety of significant ecological purposes, especially in the State of California where a majority of these ecosystems have been removed, degraded, or altered due to human interferences. A large portion of this interference comes from a strong agricultural presence throughout the state. In order to combat further ecological loss, private and public entities have begun strong restorative and managerial efforts. This project reviews the effects of agriculture in riparian and wetland areas, and what are the best management practices focusing on the Santa Clara River Watershed and the Elkhorn Slough found in Monterey Bay. …

A Systematic Review Of Gambling-Related Findings From The National Epidemiologic Survey On Alcohol And Related Conditions, Jasmine M.Y. Loo, Shane W. Kraus, Marc N. Potenza

Psychology Faculty Research

Background and aims: This systematic review analyzes and summarizes gambling-related findings from the nationally representative US National Epidemiological Survey on Alcohol and Related Conditions (NESARC) data. Methods: Systematic literature searches in accordance with PRISMA guidelines found 51 eligible studies that met inclusion criteria. Eight studies utilized both Waves 1 and 2 NESARC data, and selection of sample sizes varied from 185 to 43,093 individuals, consistent with specified research objectives of each study. Results: The prevalence of lifetime pathological gambling was 0.42% (0.64% among men, 0.23% among women), while past-year prevalence was 0.16%. Pathological gambling rates were generally higher in populations …

Understanding The Mechanism Of Stress Mitigation In Selenium-Doped Germanium Electrodes Via A Reaction-Diffusion Phaseield Model, Xiao Wang

Theses and Dissertations

Recent experiments revealed micrometer (µm)-sized Selenium (Se)-doped Germanium (Ge) particles forming a network of inactive phase (Li-Ge-Se) bring superior performance in cycling stability and capacity over un-doped Ge particles. Therefore, based on two states of Li (one for diffusion and another for alloyed reaction), a phaseield model (PFM) is developed incorporating both chemical reaction and Li diffusion to investigate remaining elusive underpinning mechanism. The reaction-diffusion PFM enables us to directly determine the conditions under which the lithiation process is diffusion- and/or reaction-controlled. Moreover, coupling the elasto-plastic deformation, the model allows us to investigate the role of the inactive phase in …

Numerical Modeling Of Effects Of Extreme Precipitation And Flooding On Earthen Levees Under A Changing Climate, Firas Jasim

Theses and Dissertations

Adaptation to climate change requires a careful evaluation of the infrastructure performance under extreme events in a changing climate. Earthen levees are critical infrastructure systems, which play a vital role to the country’s safety, environment, and economic security. The main objective of this study is to quantitatively assess the integrity of earthen levees subject to extreme precipitation and flooding under a changing climate. A multi-disciplinary modeling framework is developed and applied to two earthen levees, Elkhorn and Sherman Island levees, in California. Patterns of extreme precipitation and flooding are obtained for the study areas under current and future climate. A …

A Discrete Event Simulation-Based Approach For Managing Cyber Vulnerabilities In A Full-Service Deep Waterway Port, Hebah Mohammed Mimesh

Theses and Dissertations

Deepwater sea ports are considered to be gateways for global trade and susceptible to a diverse range of risks, including natural disasters such as hurricane, storm, drought, as well as a course of events ranging from human error to malicious cyber-attack. To deal with cyber vulnerabilities, this study examines how cyber-attack to a given technology (e.g., Programmable Logic Controllers (PLC), Radio Frequency Identification Tags (RFID), Navigation Technologies, and others) impacts the overall port operations. We use Port of Pascagoula as testbed to visualize and validate the modeling results utilizing FlexSim software. Several sets of experiments are conducted to provide important …

An Analysis Of User Comfort For Wearable Devices And Their Impact On Logistical Operations, Eboni Smith

Theses and Dissertations

This dissertation is comprised of three different studies researching user perception of comfort when using wearable technology. The first study investigated the use of altered smart glasses to study comfort, preference, and performance while executing common logistical order picking and shipment putting tasks. The impact of design type (weighted front, side, or back) was investigated using comfort rating scales (CRS). There was no significant difference in device preference regardless of task type. Despite the side weighted arrangement being the most comfortable, the participants still felt uncomfortable. The second study explored modifying the weights to the six dimensions of the CRS …

Dnp Project: Development Of A Nurse-Led Pop-Up Clinic Model In San Diego, Jennifer King

Doctor of Nursing Practice (DNP) Projects

Baccalaureate nursing programs across California (CA) are required by the state board of nursing to provide theory of public health and applied clinical learning to meet the requirements of the state’s public health nurse (PHN) certification. Students in Bachelor of Science in Nursing (BSN) programs are expected to enter the workforce prepared to address population health needs that synthesize community-based assessment and understand epidemiologic approaches to strategize interventions in diverse populations at the local, state and national levels. To adequately prepare nurses for true population health practice, clinical experiences need to be in appropriate settings where they can apply theory …

Enhanced Controllers For Voltage-Sourced Converters Interfaced With Weak Ac Power Grids, Sushil Silwal

Theses and Dissertations

Many distributed energy resource (DER) systems are remotely located and are often interfaced at low or medium voltage levels through power electronics converters such as voltage-sourced converters (VSC). Therefore, a weak-grid situation is encountered where the voltage and frequency at the point of DER coupling can experience fluctuations. A power converter designed to operate in normal and strong grid conditions may not perform satisfactorily during such weak and distorted grid conditions. Hence, considering the full dynamics of the system during weak-grid conditions in the design of converter control is indispensable to ensure the stability of the DER and the grid. …

Ud In The News Dec. 6-13, University Of Dayton

News Releases

The Atlantic examined UD's role as an anchor institution in Dayton. The Online Jurist featured the law school in a story about the American Bar Association increasing online learning hours. Michelle Pautz, assistant provost for the Common Academic Program, was a guest of Faculty Focus. GEN, a new publication focused on politics, power and culture, talked to historian Ashleigh Lawrence-Sanders about Confederate monuments.

Building The Hiv Public Health Service Structure By Quality Improvement, Graham F. Watts Sr

Florida Public Health Review

Quality improvement (QI) is a tool in the public health inventory. It has value in that it provides a modality for accelerating science-based intervention into routine public health practice. In doing so, it holds promise to make transparent how care and service systems demonstrate efficiencies in the structure, operations, and outputs that should translate into improvements in population health outcomes. One HIV health services grant in Northeast Florida touches the lives of over 4,200 persons. How to render services so that it maximally benefits all clients is ongoing work. Service recipients engage nine HIV care funded providers, who differentiate on …

Co2 Hydrogenation To High-Value Products Via Heterogeneous Catalysis, Run-Ping Ye, Jie Ding, Weibo Gong, Morris D. Argyle, Qin Zhong, Yujun Wang, Christopher K. Russell, Zhenghe Xu, Armistead G. Russell, Qiaohong Li, Maohong Fan, Yuan-Gen Yao

Faculty Publications

Recently, carbon dioxide capture and conversion, along with hydrogen from renewable resources, provide an alternative approach to synthesis of useful fuels and chemicals. People are increasingly interested in developing innovative carbon dioxide hydrogenation catalysts, and the pace of progress in this area is accelerating. Accordingly, this perspective presents current state of the art and outlook in synthesis of light olefins, dimethyl ether, liquid fuels, and alcohols through two leading hydrogenation mechanisms: methanol reaction and Fischer-Tropsch based carbon dioxide hydrogenation. The future research directions for developing new heterogeneous catalysts with transformational technologies, including 3D printing and artificial intelligence, are provided.

Project Leaf Year, Allison Godfrey

Honors Projects

On the most basic level, Project Leaf Year is an environmentally focused page-a-day desk calendar. However, the calendar is much more as it is a tool to promote an overarching environmental movement. This calendar is sustainable in both its construction and its purpose involving sustainable manufacturing, spiral-binding, and reusable considerations. The calendar itself includes nature photographs from local artists, daily tasks to promote conservation efforts, and supplemental educational information (either through website articles or videos) for the purpose of inspiring individuals to make environmentally conscious decisions.

Point Cloud Processing With Neural Networks, Stephanie Miller, Jiahao Li

All Computer Science and Engineering Research

In this project, we explore new techniques and architectures for applying deep neural networks when the input is point cloud data. We first consider applying convolutions on regular pixel and voxel grids, using polynomials of point coordinates and Fourier transforms to get a rich feature representation for all points mapped to the same pixel or voxel. We also apply these ideas to generalize the recently proposed "interpolated convolution", by learning continuous-space kernels as a combination of polynomial and Fourier basis kernels. Experiments on the ModelNet40 dataset demonstrate that our methods have superior performance over the baselines in 3D object recognition.

Identifying Design Strategies To Mitigate The Risk Introduced Into New Product Development By Suppliers, Shridhar Palekar

Theses

For every organization, an efficient and effective product development process is a key to generate and manage growth opportunities. Often strategic relationships with key suppliers and partners are required as organizations do not have all the competencies that are crucial to the development of a product. This is particularly true for Original Design Manufacturer (ODM) and Joint Development Manufacturer (JDM) supplier relationships, which are characterized by a high degree of supplier involvement in every stage of product development. If the interactions with these key suppliers are not managed properly, there is significant risk that the endeavor will end up with …

Ypfs Lessons Learned Oral History Project: An Interview With Tim Clark, Tim Clark, Lynnley Browning

Documents

Suggested Citation Form: Clark, Timothy. 2022. “Lessons Learned Interview by Lynnley Browning, December 13, 2019."Yale Program on Financial Stability Lessons Learned Oral History Project. Transcript. https://ypfs.som.yale.edu/library/ypfs-lesson-learned-oral-history-project-interview-timothy-clark

Commencement Ceremonies, University Of North Florida

Commencement Printed Materials

Program for the Fall Commencement ceremonies.

Overall Equipment Effectiveness For Additive Manufacturing, Brian Reid

Theses and Dissertations

Additive manufacturing is becoming a leading technology in the production of consumer parts. In order to compete with traditional methods which have had years to improve, additive systems must achieve a level of performance efficiency greater than it maintains today. While great effort is being expended to improve the printing time and add more systems level thinking to the problem, it is currently lacking a robust improvement methodology. To achieve the desired improvement, a technique from traditional manufacturing based on overall equipment effectiveness (OEE) is proposed. Overall additive manufacturing effectiveness (OAME) provides a methodology for enhancing this important emerging technology.

Personal Tragedies Can't Keep Josh Biris From Graduation Day, Ge Aviation Operations Management Leadership Program, University Of Dayton

News Releases

"It could be worse," University of Dayton senior Josh Biris said during the first week of December, near the anniversaries of his parents' deaths. "I could have given up after their passing, but that's not what my parents wanted for me. They wanted me to finish college. They wanted me to succeed and become something. I did it for them." Come this Saturday, Biris will have "done it for them" with a mechanical engineering degree with honors and a job in GE Aviation's Operations Management Leadership Program. In future Decembers, the calendar will feature the anniversary of his graduation.

Modeling Micromechanics Of Solidluid Interactions In Granular Media, Daniel Johnson

Theses and Dissertations

Micromechanics of solidluid interactions can play a key role controlling macro-scale engineering behavior of granular media. The main objective of this study is to numerically investigate the micromechanics involved in solidluid mixtures to develop a better understanding of the macroscopic behavior of granular media for different applications. This is accomplished by developing a numerical model coupling the Discrete Element Method (DEM) and the Lattice Boltzmann Method (LBM) and employing it to study three distinct yet interrelated applications throughout the course of this research. In the first application, the DEM model is used to provide a clear relationship between energy dissipated …

Flexural Bending Test Of Topology Optimization Additively Manufactured Parts, Mohammed Afify

Theses and Dissertations

The aim of this work is to model, manufacture, and test an optimized Messerschmitt-BölkowBlohm beam using additive manufacturing. The implemented method is the Solid Isotropic Material with Penalization of a minimum compliance design. The Taubin smoothing technique was used to attenuate geometric noise and minimize the formation of overhanging angles and residual stresses due to the thermal activity of the selective laser melting process. The optimized model required examination and repair of local errors such as surface gaps, non-manifold vertices, and intersecting facets. A comparison between experimental and numerical results of the linear elastic regimes showed that the additively manufactured …

Information Retrieval From Spaceborne Gnss Reflectometry Observations Using Physics- And Learning-Based Techniques, Orhan Eroglu

Theses and Dissertations

This dissertation proposes a learning-based, physics-aware soil moisture (SM) retrieval algorithm for NASA’s Cyclone Global Navigation Satellite System (CYGNSS) mission. The proposed methodology has been built upon the literature review, analyses, and findings from a number of published studies throughout the dissertation research. Namely, a Sig- nals of Opportunity Coherent Bistatic scattering model (SCoBi) has been first developed at MSU and then its simulator has been open-sourced. Simulated GNSS-Reflectometry (GNSS-R) analyses have been conducted by using SCoBi. Significant findings have been noted such that (1) Although the dominance of either the coherent reflections or incoher- ent scattering over land is …

Tcb Minimizing Model Of Computation (Tmmc), Naila Bushra

Theses and Dissertations

The integrity of information systems is predicated on the integrity of processes that manipulate data. Processes are conventionally executed using the conventional von Neumann (VN) architecture. The VN computation model is plagued by a large trusted computing base (TCB), due to the need to include memory and input/output devices inside the TCB. This situation is becoming increasingly unjustifiable due to the steady addition of complex features such as platform virtualization, hyper-threading, etc. In this research work, we propose a new model of computation - TCB minimizing model of computation (TMMC) - which explicitly seeks to minimize the TCB, viz., hardware …

The Effects Of Impure Water Sources On The Early-Age Properties Of Calcium Sulfoaluminate Cements, Wendy Long

Theses and Dissertations

One of the benefits of calcium sulfoaluminate (CSA) cements is that these materials gain strength rapidly, where strength development is often measured in hours instead of days. This property makes these materials desirable for use in temporary, non-reinforced repairs of roadways, airfields, and navigable locks. The rapid repair of these infrastructure elements is critical to transporting supplies into regions devastated by disaster. In these austere environments, potable water may not be available in sufficient quantities to make vital repairs, and the use of impure water in the production of CSA cement-based concrete would be advantageous. However, the hydration products formed …

Understanding State-Of-The-Art Material Classification Through Deep Visualization, Jordan Donovan

Theses and Dissertations

Neural networks (NNs) excel at solving several complex, non-linear problems in the area of supervised learning. A prominent application of these networks is image classification. Numerous improvements over the last few decades have improved the capability of these image classifiers. However, neural networks are still a black-box for solving image classification and other sophisticated tasks. A number of experiments conducted look into exactly how neural networks solve these complex problems. This paper dismantles the neural network solution, incorporating convolution layers, of a specific material classifier. Several techniques are utilized to investigate the solution to this problem. These techniques look at …

Engineering Pathological Microenvironments For Cardiovascular Disease Studies, Ojaswee Adhikari

Theses and Dissertations

Food insecurity is a growing issue in the United States. Iron deficiency is the most common form of nutritional deficiency in patients with endothelial dysfunction and vascular-related diseases. This preliminary study lays the groundwork for the “Nutrient deficiency-on-a-chip” model. Endothelial cells are cultured on mechanically tunable, enzymatically cross-linked gelatin and treated with deferoxamine, an iron chelator, or angiotensin II were used to simulate a nutrient deficient and diseased environment, respectively. As oxidative stress and disturbed barrier function are the most prevailing mechanism of angiotensin II and iron deficiency induced endothelial dysfunction, to test our model we investigated the changes in …

Modeling Thermodynamic And Transport Properties Of Soft And Porous Materials, Md Masrul Huda

Theses and Dissertations

Molecular simulations are computer experiments that allow us to investigate thermodynamic and transport properties of complex chemical systems. Here, we have investigated self-assembly of organogelators and analysed the diffusion characteristics of small molecules in the nanopores of zeolites. Molecular gels are attractive soft-materials with viscoelastic properties with applications in drug delivery, tissue engineering, sensing, etc. Small organic amphiphilic gelators act as a building block of complex 3-dimensional network in molecular gels. Due to time and length scale differences, the understanding and characterization of early stage aggregation of gelators is difficult using experimental techniques. Classical and quantum mechanical approaches have been …

Numerical Modeling Of Compacted Fills Under Landing Mats Subjected To Aircraft Loads, Jeremiah Matthew Stache

Theses and Dissertations

Rutting failures are prominent in expedient airfields constructed with AM2 landing mats over soft existing subgrades. There are many issues that must be addressed when approaching this multiaceted problem. The load transfer mechanism occurring at interlocking mat joints and the mat-soil interface bonding condition affect near surface subgrade response. The repeated loading coupled with lateral aircraft wander causes significant principal stress rotation in the subgrade. This kneading action then causes variations in the excess pore-water pressure and a subsequent softening of the soil. The purpose of this study is to investigate the critical factors that lead to subgrade rutting failures …