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Hydration Of High-Alumina Calcium Aluminate Cements With Carbonate And Sulfate Additives, Jonathan Lapeyre, Sai Akshay Ponduru, Monday Uchenna Okoronkwo, Hongyan Ma, Aditya Kumar

Chemical and Biochemical Engineering Faculty Research & Creative Works

This study investigated the influence of limestone (LS) and calcium sulfate (C$) mineral additives on the hydration kinetics of high-α-Al₂O₃ calcium aluminate cement (CAC) utilizing experimental techniques and thermodynamic simulations. Increasing the replacement level of limestone or calcium sulfate increased the cumulative heat of the hydration reaction. The limestone exhibited limited acceleratory effects to the CAC hydration kinetics due to the coarseness of the powder. The coarse particle size distribution limited any heterogenous nucleation that would have occurred with a finer particle size as well as the intrinsic insolubility kinetically limits the formation of monocarboaluminate phases. Conversely, …

Liquid And Solids Phase Backmixing In A Bubble And Slurry Bubble Column Using A Virtual Tracer Response Methodology Based On The Trajectory Data Of The Radioactive Particle Tracking (Rpt) Technique, Lu Han, Premkumar Kamalanathan, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

Virtual tracer response methodology developed based on the trajectory data of the computer aided radioactive particle tracking (CARPT) technique was demonstrated. The demonstrated virtual tracer technique has advantages of non-invasiveness, near perfect injection/sampling, and flexibility in choosing the sampling/injection boundaries in a specific spatial pattern. With the developed virtual tracer technique, liquid and solids back mixing was investigated at the conditions mimicking Fischer-Tropsch synthesis. Experiments were conducted at different pressure, solids loading, and superficial gas velocity. The axial dispersion model (ADM) and recirculation and cross flow dispersion (RCFD) models were used to model the liquid mixing. Transient sedimentation dispersion model …

Review Of Biomechanical Studies And Finite Element Modeling Of Sternal Closure Using Bio-Active Adhesives, Amatulraheem Al-Abassi, Marcello Papini, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

The most common complication of median sternotomy surgery is sternum re-separation after sternal fixation, which leads to high rates of morbidity and mortality. The adhered sternal fixation technique comprises the wiring fixation technique and the use of bio-adhesives. Adhered sternal fixation techniques have not been extensively studied using finite element analysis, so mechanical testing studies and finite element analysis of sternal fixation will be presented in this review to find the optimum techniques for simulating sternal fixation with adhesives. The optimal wiring technique should enhance bone stability and limit sternal displacement. Bio-adhesives have been proposed to support sternal fixation, as …

Malignant Acute Disseminated Encephalomyelitis (Adem) Presenting As A Stroke Alert: A Case Report., Madeline J Hooper, Joshua A. Kalter Ms3, Nicholas S. Imperato, Marna R. Greenberg Do, Mph, Facep

Department of Emergency Medicine

Acute disseminated encephalomyelitis (ADEM) is a rare illness. Generally characterized by encephalopathy and non-specific, heterogeneous neurological deficits depending on the location of the demyelinated lesions, ADEM is considered a clinical diagnosis with radiological findings that may or may not have supportive features based on the temporal relationship of an inciting factor and symptom onset. Even rarer, hyperacute or malignant ADEM can be defined by rapid symptom onset followed by catastrophic brain edema and its sequelae. We present a case of a patient who presented with an acute stroke with activation of a rapid sequence care pathway (stroke alert protocol) to …

Intervention To Modify Perceptions Of Homelessness, Sophie Srivastava, Vincent Berardi, David Frederick

Student Scholar Symposium Abstracts and Posters

As public opinion is known to impact policy formation, assessing how the public misperceives the homeless population is important to prevent non-informed policies from being adopted. This study focused on correcting misperceptions about the homeless as a means to garner support for public policies that are known to improve the lives of homeless individuals and those with mental illness. The research study implemented two forms of virtual interventions (refutation texts and personal anecdotes from homeless individuals) plus a control and assessed support for various policies before and after the trial. The goal of the study was to determine which intervention …

A Free Relationship To Technology, Haley Lilla

Student Scholar Symposium Abstracts and Posters

What is the difference between pre-modern technology and modern technology? The windmill, one of man's oldest machines, and the modern wind turbine generate power in different ways: one catches and transforms energy while the other extracts and stocks energy into standing-reserve, something waiting for technical application. One works in accordance with nature, while the other withdraws, stores, and wills nature into supply. The danger of humanity's tendency to use technology to position things into standing-reserve, a mere resource waiting for production, is the possibility that humanity will gradually view itself as standing-reserve. People will be seen merely as inventory in …

Visual Demonstration Of Substituent Effects For Chromium(Vi) Alcohol Oxidation, Biyu (Chelsea) Zhao

Student Scholar Symposium Abstracts and Posters

This research visualized the effect of different substituents, which could be either activators or deactivators on an aromatic ring for alcohol oxidants using Chromium(VI). The color of chromic acid changes from orange to blue gradually, providing a method to visualize the rate. Rate constants were used as a quantitative method to evaluate the rate.

Will Genius Fail? The Effect Of Age, Education Level, And Race On Fear Of Financial Collapse, Peter Mayne Cline

Student Scholar Symposium Abstracts and Posters

From the fall of Long Term Capital Management in 1998 to the housing derivative bubble of 2008, financial collapses have caused catastrophe in the United States. In this paper, I examine the correlation between age, education level, race, and fear of financial collapse. Scholars have examined the correlation between age and risk aversion and the correlation between past financial collapse and stress; however, determining these factor’s effect on fear of financial collapse provides scholars and fund managers alike with important insights into what may drive the different investment mindsets. This study is conducted with data from the Chapman Survey of …

Changes In Western U.S. Streamflow Extremes Under Climate Change, Rama Bedri

Student Scholar Symposium Abstracts and Posters

We are analyzing streamflow extremes in Western U.S. rivers due to climate change. Global warming causes natural disasters to reach extreme points and affects river volumes, snowfall, and precipitation amounts. We analyze the data for 17 stations in the Colorado River Basin, whose rivers provide Southern California’s drinking water supply. Disruptions in streamflow due to climate change affect the region’s water availability and make it difficult to predict future trends. We compared historical streamflow data to eight possible climate scenarios. The different scenarios are Warm Dry, Cool Wet, Average, and Other at emission levels of RCP 4.5 and 8.5. First, …

Ketone Hydrosilylation Studies Using A Carbodiphosphorane Catalyst, Liam Sullivan, Allegra Liberman-Martin

Student Scholar Symposium Abstracts and Posters

The objective of this research is to discover an effective, safe, and low-cost catalyst for ketone hydrosilylation reactions, which involve the addition of a silicon–hydrogen bond across a C=O double bond. Improving catalyst efficiency could benefit the organic synthesis industry, as carbonyl hydrosilylation is used industrially in the synthesis of alcohol products. Use of the carbodiphosphorane catalyst as a replacement for toxic heavy-metal-containing catalysts could reduce waste and emissions harmful to the environment, while also providing an alternative means for accomplishing ketone reduction. Using a cyclic carbodiphosphorane catalyst, we have compared catalytic activity toward acetophenone hydrosilylation for a range of …

Dress Coding Latinidad? Color-Blind Sexism In School Dress Code Policies, Marisa Quezada

Student Scholar Symposium Abstracts and Posters

Whether dressing for the private or public, clothing is an essential aspect of the human experience; making it a topic that all individuals have some form of connection to. Dress code policies have been a point of contestation for many students for centuries, dating back to Native American boarding schools limiting certain types of clothing or the landmark Tinker v Des Moines case of 1969. Even through the courts at the time argued that students do not “shed their constitutional rights to freedom of speech or expression at the schoolhouse gate” in regards to their political expression, dress codes continue …

Thinkmed: Inspiring The Future Of Stem, One Project At A Time, Steven Trinh, Lauren Dudley

Student Scholar Symposium Abstracts and Posters

ThinkMED is a nonprofit initiative offering a four-week curriculum specifically designed to develop critical thinking and encourage evidence-based decision making. Each week’s content material revolves around the use of a ThinkBOX science kit containing four (4) wet-lab experiments designed to supplement the curriculum. Each experiment is formulated to be inclusive of all California Next Generation Science Standards (NGSS) K-5. At the end of each week, students get the opportunity to speak with university professors & scientists from a multitude of subject areas including chemistry, anatomy, computer science, physiology, and bioengineering. ThinkBOXes are donated to children and families who do not …

The One Who Won, Jeanna Polisini

Student Scholar Symposium Abstracts and Posters

I am an adopted Asian American with an Italian last name who was raised in the Jewish faith. While I am one of the lucky ones, the One-Child Policy is responsible for how my life turned out. My intention is to confront the inhumanity of this horrific policy with my adoption story. Until policies personally affect someone’s life, many people do not think twice about the other country’s problems and their repercussions on a global level. For my senior exhibition, I created an autobiographical installation to explore my adoption story and how China’s inhumane dictatorship. The full immersive installation will …

The Growth Of Polarization Domains In Ultrathin Ferroelectric Films Seeded By The Tip Of An Atomic Force Microscope, Mohammad Zamani-Alavijeh, Timothy A. Morgan, Adrian V. Kuchuk, Gregory J. Salamo

Physics Faculty Publications and Presentations

Piezoresponse force microscopy is used to study the velocity of the polarization domain wall in ultrathin ferroelectric barium titanate (BTO) films grown on strontium titanate (STO) substrates by molecular beam epitaxy. The electric field due to the cone of the atomic force microscope tip is demonstrated as the dominant electric field for domain expansion in thin films at lateral distances greater than about one tip diameter away from the tip. The velocity of the domain wall under the applied electric field by the tip in BTO for thin films (less than 40 nm) followed an expanding process given by Merz's …

The Impact Of Inclination-Dependent Attenuation On Ultraviolet Star Formation Rate Tracers, Keith Doore, Rafael T. Eufrasio, Bret D. Lehmer, Erik B. Monson, Antara Basu-Zych, Kristen Garofali

Physics Faculty Publications and Presentations

We examine and quantify how hybrid (e.g., UV+IR) star formation rate (SFR) estimators and the AFUV–β relation depend on inclination for disk-dominated galaxies using spectral energy distribution modeling that utilizes the inclination-dependent attenuation curves described in Doore et al. We perform this analysis on a sample of 133 disk-dominated galaxies from the CANDELS fields and 18 disk galaxies from the Spitzer Infrared Nearby Galaxies Survey and Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel samples. We find that both the hybrid SFR estimators and the AFUV–β relation present clear dependencies on inclination. To quantify …

How Prison Systems Can Better Aid People With Substance Use Disorders, Avery Faires

College Honors Program

A large percentage of prisoners in the United States are suffering from a Substance Use Disorder (SUD), but many prisons across the country lack the proper resources to rehabilitate those with drug addictions. Incarcerated people with SUD face many dangerous and sometimes deadly consequences after release. My thesis addresses key associated questions: What role do prisons play in helping prisoners with SUD? And, how can they aid this population more effectively? When considering the breadth of such issues, I examine the sociohistorical context of drug policy in the U.S. to inform my analysis of the criminalization of substances, the greater …

Woven Words In The Iliad: Gender, Narrative, And Textile Production In The Scholia Of The Venetus A Manuscript, Anne-Catherine Schaaf

College Honors Program

The work of previous scholars has established powerful connections between the process of creating textiles and process of epic oral composition. I build on disparte sources from the fields of archaeology and philology and analyze how the scholia in one epic manuscript of the Iliad, the Venetus A, treat this issue and with a focus on how it interplays with gender, specifically the female characters in the Iliad who produce textiles. I focus on a few major sections of scholia and important scenes of weaving in the Iliad. The key female characters in the novel, both divine and human nearly …

The Character Of Jury Exclusion, Anna Offit

Faculty Journal Articles and Book Chapters

Encounters with the legal system are unevenly distributed throughout the American population, with Black and poor citizens targeted as disparate subjects of surveillance, arrest, and criminal conviction. At the same time, these encounters, as well as a stated belief in the unfairness of the legal system, are commonly viewed as legitimate grounds for excusal from jury service. This follows from an understanding of juror bias that assumes that people with negative experiences with legal actors—police and prosecutors, for example—will be less likely to trust and more likely to discount the contributions of those actors within the context of the jury …

Awakening To Beauty, Volume Viii, University Of Dayton. University Honors Program, Angela Ann Zukowski

Chaminade Scholars: Awakening to Beauty

Images and reflections of the members of the 2023 cohort of Chaminade Scholars. Published in May 2022.

Electronic Fingerprint Safe, Bryton Flecker, Carlos Bucheli, Tristan Arias

Mechatronics Final Projects

The objective for this project was to create a lockbox storage solution which used a fingerprint sensor (3) as the mechanism for locking and unlocking the device. A user of the device would have the ability to add or remove up to four fingerprints from the device while it is unlocked. As a backup measure for the event that a fingerprint is no longer recognized, the lockbox will have a preprogrammed PIN assigned to the device which the user can enter to unlock it. User input was implemented via a series of buttons (5) on the front panel of the …

Manifestations Of Myth In Antonin Dvořák’S Stabat Mater, Pia Marie Rodriguez

Music Honors Theses

No abstract provided.

A Remote-Controllable Robotics Platform Based On The Pic16f88 Microcontroller, Clyde Johnson, Matthew Roche, Max Ulmer

Mechatronics Final Projects

The goal of this mechatronics system design project is to create a simple robotics control and interface platform using a Microchip PIC processor. The intent is for this platform to be able to host a wide variety of simple sensors, displays, and outputs that can be carried around by its drive. The platform will be able to take in and interpret 2.4GHz remote-control signals.

For a novel twist on remote-control robotics, we have designed this robot to be encapsulated within an acrylic sphere. It is platformed on a 3D-printed chassis that holds upright its two geared DC motors that rest …

Vinyl Player, Cooper Adams, Joshua Geer, Drew Gray

Mechatronics Final Projects

The goal for our final project was to design and manufacture a record player capable of producing music using a 12 inch LP or 7-inch single vinyl record. When powered, the record player spins the vinyl at a specific speed, and using the needle sound vibrations are sent to an audio amplifier to output sound. A motor is used to control the desired speed and rotate the plate which the vinyl record is placed on. Figure 1 shows a simplified sketch of the needle cartridge system; the system consists of a needle and an attached magnet that is placed near …

Defenses In Dispute: The Bureaucratic And Domestic Politics Of The First Anti-Ballistic Missile Debate, Samuel D. Lair

History Honors Theses

Since the dawn of the missile age in the mid-1940s, policymakers have grappled with the question of whether and how to defend against ballistic missiles. The saga of the rise of the United States’ first anti-ballistic missile system, known initially as Sentinel and later as Safeguard, and its subsequent demise after the signing of the Anti-Ballistic Missile Treaty in 1972, has been well cataloged by historians and strategic thinkers. Although many scholars present the story of this ABM system as the logical and inexorable consequence of the acceptance of deterrence theory and mutual vulnerability by the U.S and the Soviet …

The Story Of The Ziffersystem And The Russian Mennonites: Counting Blessings, Emily Grace Warkentin

Music Honors Theses

No abstract provided.

Community Connections, May 2022, University Of Dayton. Fitz Center For Leadership In Community

Newsletter: Community Connections

No abstract provided.

Tennessee Jail Summary Report, May 2022, Tennessee. Department Of Correction.

Jail Summary Reports

No abstract provided.

The Effects Of Microgravity On Human Endothelial Cells In Relation To Deep Vein Thrombosis, Allie Burgess

Biomedical Engineering Undergraduate Honors Theses

Deep vein thrombosis (DVT) is a condition where blood clots form in one or more of the deep veins of the body, causing leg pain and/or swelling, potentially leading to pulmonary embolism and/or stroke. The incidence of DVT among astronauts serving on the International Space Station has been shown to be greater than that of the general population, calling into question the effects of microgravity on human thrombolytic processes. Additionally, microgravity conditions have been shown to cause muscular atrophy and a decrease in muscle strength and mobility. Because collagen composes a large portion of muscle tissue, this study also assessed …

Hydrogel Drug Delivery Platform Integrity And Utilization Analysis, Joshua Carson Adams

Biomedical Engineering Undergraduate Honors Theses

Traumatic Spinal Cord Injury (SCI) generally results in permanent sensorimotor dysfunction. This is due to failed axonal regeneration at the site of injury. Recent studies have highlighted the use of stem-cell based therapies embedded in hydrogel to treat SCI. Embedding cell therapies in hydrogel provides a platform that increases the survival of both integrated grafted cells and stem cells/stem cell progeny. There are a variety of drug delivery agents for treating SCI such as neuro-regenerative cells and Schwann cells, however, single agents are not promising for functional regeneration. We propose a combinatorial approach using sciatic nerve (SN) extracellular matrix (ECM), …

Determination Of Tissue-Level Changes In Tumors That Are Indicative Of Metastasis Using Optical Spectroscopy, Sanidhya D. Tripathi

Biomedical Engineering Undergraduate Honors Theses

Breast cancer, accounting for 12% of all new cancer cases, is one of the leading causes of death in women worldwide. Although patient survival has improved over the years, metastatic spread to other organ sites and not due to the primary tumor is the most common form of tumor recurrence, accounting for 90% deaths. Hypoxia is a common hallmark of solid tumors and is linked with metastasis, therapeutic resistance, and poor patient survival. Defined as a state of decreased oxygen availability, cells under hypoxia have an increased rate of genetic mutation, local invasion, and resistance to treatment such as radiation …