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2019

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Real-Time Electrical Impedance Monitoring Of Carbon Fiber-Reinforced Polymer Laminates Undergoing Quasi-Static Indentation, Khaled Almuhammadi, Arief Yudhanto, Gilles Lubineau Jan 2019

Real-Time Electrical Impedance Monitoring Of Carbon Fiber-Reinforced Polymer Laminates Undergoing Quasi-Static Indentation, Khaled Almuhammadi, Arief Yudhanto, Gilles Lubineau

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Laminated composites are vulnerable to damage from out-of-plane loading, particularly impact loading, and the incurred damage is often only detected by evaluating the post-impact condition of the composites. Real-time monitoring techniques are desirable for early detection of damage. Utilizing changes in the electrical properties of composites to track incurred damage is promising, but the interpretation of such measurements is still challenging. Here, an electro-mechanical system is introduced to understand how well we could detect mechanical degradation in carbon-fiber-reinforced polymer (CFRP) plates undergoing a quasi-static indentation (QSI) test, which is representative of an impact load. The system measures the in situ, …

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An Experimental Approach That Assesses In-Situ Micro-Scale Damage Mechanisms And Fracture Toughness In Thermoplastic Laminates Under Out-Of-Plane Loading, H. Wafai, A. Yudhanto, G. Lubineau, R. Yaldiz, N. Verghese Jan 2019

An Experimental Approach That Assesses In-Situ Micro-Scale Damage Mechanisms And Fracture Toughness In Thermoplastic Laminates Under Out-Of-Plane Loading, H. Wafai, A. Yudhanto, G. Lubineau, R. Yaldiz, N. Verghese

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Studying the response of laminated composites under out-of-plane loading routinely involves mechanical tests, such as quasi-static indentation or impact. The phenomenology during these tests is so complex that it is difficult to identify different material properties related to each failure mechanism (damage mode). We aim at providing an experimental approach, which is practical and fast, for assessing the in-situ micro-scale damage mechanism and extracting the fracture toughness in thermoplastic laminates under out-of-plane loading. To this end, we developed a dedicated, micro-scale, three-point bending (micro-3PB) test fitted inside a scanning electron microscope (SEM). In a single experiment, we were able: (i) …

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Corrigendum To ‘Zinc Oxide As An Active N-Layer And Antireflection Coating For Silicon Based Heterojunction Solar Cell’ [Sol. Energy Mater. Sol. Cells 139 (2015) 95–100](S0927024815001324)(10.1016/J.Solmat.2015.03.017), Babar Hussain, Abasifreke Ebong, Ian Ferguson Jan 2019

Corrigendum To ‘Zinc Oxide As An Active N-Layer And Antireflection Coating For Silicon Based Heterojunction Solar Cell’ [Sol. Energy Mater. Sol. Cells 139 (2015) 95–100](S0927024815001324)(10.1016/J.Solmat.2015.03.017), Babar Hussain, Abasifreke Ebong, Ian Ferguson

Electrical and Computer Engineering Faculty Research & Creative Works

The authors regret that permanent email address of the corresponding author is "[email protected]". The authors would like to apologize for any inconvenience caused.

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Impulse Measurements Of Electric Solid Propellant In An Electrothermal Ablation-Fed Pulsed Plasma Thruster, Matthew S. Glascock, Joshua L. Rovey, Kurt A. Polzin Jan 2019

Impulse Measurements Of Electric Solid Propellant In An Electrothermal Ablation-Fed Pulsed Plasma Thruster, Matthew S. Glascock, Joshua L. Rovey, Kurt A. Polzin

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Electric solid propellants are advanced solid chemical rocket propellants that can be controlled (ignited, throttled and extinguished) through the application and removal of an electric current. These propellants are also being considered for use in the ablative pulsed plasma thruster. In this paper, the performance of an electric solid propellant operating in an electrothermal ablation-fed pulsed plasma thruster was investigated using an inverted pendulum micro-Newton thrust stand. The impulse bit and specific impulse of the device using the electric solid propellant were measured for short-duration test runs of 100 pulses and longer-duration runs to end-of-life, at energy levels of 5, …

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Electric Solid Propellant Ablation In An Arc Discharge, Matthew S. Glascock, Joshua L. Rovey, Kurt A. Polzin Jan 2019

Electric Solid Propellant Ablation In An Arc Discharge, Matthew S. Glascock, Joshua L. Rovey, Kurt A. Polzin

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Electric solid propellants are advanced solid chemical rocket propellants that can be controlled (ignited, throttled, and extinguished) through the application and removal of an electric current. Electric solid propellants are also being considered for pulsed arc ablation electric thrusters, such as the pulsed plasma thruster. The focus of this work is the electrical and ablation characteristics of electric solid propellant within an arc discharge. Arc discharges of 5–20 J per pulse were created within a cylindrical cavity, and results for the electric solid propellant are compared with polytetrafluoroethylene (PTFE), which is a traditional propellant in ablative pulsed plasma thrusters. The …

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Thermodynamic And Transport Properties Of Hydroxylammonium Nitrate-Based Electric Solid Propellant Vapor, Matthew S. Glascock, Patrick D. Drew, Joshua L. Rovey Jan 2019

Thermodynamic And Transport Properties Of Hydroxylammonium Nitrate-Based Electric Solid Propellant Vapor, Matthew S. Glascock, Patrick D. Drew, Joshua L. Rovey

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Electric solid propellants are advanced solid chemical rocket propellants controlled by electric current. Electric solid propellants may also be used in an electric propulsion system, specifically, an ablative pulsed plasma thruster. Previous experiments with the electric solid propellant HIPEP suggest its ablation processes are similar to traditional propellant polytetrafluoroethylene (C2F4). Better understanding of the ablation and resulting propulsion performance of HIPEP requires a model of its vapor composition and transport properties. This paper reports on the development of such a model. The model was validated by comparing results for C2F4 with literature, which showed agreement with multiple models described. Transport …

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Experimental Investigation Of Mixtures Of 1-Ethyl-3-Methylimidazolium Ethyl Sulfate And Ethylammonium Nitrate With Electrospray Propulsion Applications, Mitchell J. Wainwright, Joshua L. Rovey, Shawn W. Miller, Benjamin D. Prince Jan 2019

Experimental Investigation Of Mixtures Of 1-Ethyl-3-Methylimidazolium Ethyl Sulfate And Ethylammonium Nitrate With Electrospray Propulsion Applications, Mitchell J. Wainwright, Joshua L. Rovey, Shawn W. Miller, Benjamin D. Prince

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Physical properties, performance metrics, and mass spectra of mixtures of two ionic liquids (1-ethyl-3-methylimidazolium ethyl-sulfate aka [Emim][EtSO4] and ethyl ammonium nitrate aka EAN) are investigated from the standpoint of electrospray propulsive characteristics. Spectra suggest that as the [Emim][EtSO4] mixture fraction increases, the intensity of [Emim][EtSO4] related species in the plume also increases, while the presence of EAN decreases. Spectra also show presence of both EAN proton transfer species and species related to chemical reaction of [EtSO4] and water. Despite the volatility of EAN, it emits stably into vacuum at low flow rates when mixed with 25% [Emim][EtSO4]. Spectra also show …

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Introduction To The Special Issue: Increasing Space For Families On The Margins, Lynn H. Turner Jan 2019

Introduction To The Special Issue: Increasing Space For Families On The Margins, Lynn H. Turner

College of Communication Faculty Research and Publications

No abstract provided.

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Infant Baptism, William B. Godbey Jan 2019

Infant Baptism, William B. Godbey

William B. Godbey

No abstract provided.

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A Brief Overview Of The Christian Endeavor Society, Brian Clifford Hull Jan 2019

A Brief Overview Of The Christian Endeavor Society, Brian Clifford Hull

Books

No abstract provided.

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The Effects Of Motivational Interviewing On Minority Clients In Vocational Rehabilitation, Cindy Khan-Jordan Jan 2019

The Effects Of Motivational Interviewing On Minority Clients In Vocational Rehabilitation, Cindy Khan-Jordan

Faculty and Staff Publications & Presentations

Motivation can foster engagement in the Vocational Rehabilitation (VR) program leading to benefits that can potentially result in sustainable employment. The purpose of this study was to examine the impact of Motivational Interviewing using the Motivation Curriculum for Vocation Rehabilitation Consumers (MCRC) on stages of change, self-determination, functional disability limitations awareness and life satisfaction on minority and non-minority VR clients with disabilities that had open cases with The Florida Division of Vocational Rehabilitation.

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Pre-Service Teachers’ Emerging Views On Educational Equity, Melody Wilson Jan 2019

Pre-Service Teachers’ Emerging Views On Educational Equity, Melody Wilson

Master's Theses and Doctoral Dissertations

An equity-based Statistics course for pre-service mathematics teachers could play a role in the development of pre-service teachers’ equity literacy, encouraging conversations about equity in education and illuminating structural factors that contribute to the educational opportunity gap in the U.S. In the Winter 2019 semester, a faculty team at the author’s university piloted such a course. The course included data explorations dealing with structural inequities by race – one of the most difficult topics to address productively in a teacher preparation course. For the present study, a survey of pre-service teachers’ views on educational equity was administered in a required …

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“But How Could We Sing A Song Of The Lord In A Foreign Land?” An Esl/Esp Class For Catholic Immigrants, Mary C. Tillotson Jan 2019

“But How Could We Sing A Song Of The Lord In A Foreign Land?” An Esl/Esp Class For Catholic Immigrants, Mary C. Tillotson

Master's Theses and Doctoral Dissertations

The U.S. Catholic population has a larger proportion of immigrants than the U.S. population at large. The majority of Catholic immigrants come from Latin America and are not native speakers of English. In this qualitative study, I interviewed nine Catholic immigrants from Latin America to better understand their experiences of navigating their Catholic faith in the United States and the role an English-as-a-second-language (ESL) class could play in helping them successfully adjust to United States Catholicism. Findings suggest that, beyond a general ESL class, an English-for-specific-purposes class, capitalizing on the universality of Catholicism and specialized for Catholic prayer, liturgy, sacraments, …

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Gis Analysis Of The Mid-Nineteenth Century Emigration Of The Old Lutherans From Prussia, Joel Seewald Jan 2019

Gis Analysis Of The Mid-Nineteenth Century Emigration Of The Old Lutherans From Prussia, Joel Seewald

Master's Theses and Doctoral Dissertations

The Old Lutherans constituted fewer than 20% of the Germans who emigrated from Prussia between 1835 and 1854. In this study, more than 483 cities and villages of origin of 6,911 Old Lutherans were mapped. These origins were in the central provinces of Brandenburg, Pomerania, Posen, Saxony, and Silesia. More emigrants came from Pomerania overall and during every time period except 1849-54. The areas with the most emigrants were north central Pomerania, northern Brandenburg, southeast Brandenburg, and western Silesia. Emigrant destinations were primarily America and Australia. American destinations included New York, Wisconsin, and Texas, but the state that many went …

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Life In The Noodles, Junnan Xia Jan 2019

Life In The Noodles, Junnan Xia

Theses

One day, a Chinese international student, Zhou Yu, is considering his going home to China, since he doesn’t have a good life in America. That day, when Yu is in the supermarket shopping, he sees his ex-girl friend, Chen Xue. Xue is friendly and asks Yu to come to her home and she wants to treat Yu a bowl of noodles, which is her special treat that she made for Yu before. Yu struggles but finally he is moved by Xue’s great passion. When they arrived at Xue’s place, they start to eat and talk. Xue is curious about Yu’s …

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The Successful Transition Of Black Men At Historically White Universities, Regina M. George Jan 2019

The Successful Transition Of Black Men At Historically White Universities, Regina M. George

Master's Theses and Doctoral Dissertations

There is something going on with Black men in America who go to college. As university enrollment has become more diverse with all ethnic and economic groups attending in greater numbers, as Black women are graduating at unprecedented rates, as postsecondary education becomes an increasingly significant employment requirement, the persistence to graduation rate of Black men as a group is among the lowest. Historically White institutions of higher education seek to ensure academic success and increase 4-6 year graduation rates for all students. Perhaps Black men can inform the process and lift everyone with their knowledge. This is a qualitative …

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Atomistic Simulations Of Nanoindentation Response Of Irradiation Defects In Iron, M. Mustafa Azeem, Qingyu Wang, Muhammad Zubair Jan 2019

Atomistic Simulations Of Nanoindentation Response Of Irradiation Defects In Iron, M. Mustafa Azeem, Qingyu Wang, Muhammad Zubair

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Radiation response of a material is a consequence of defects' evolution in any radiation damage event. The radiation-induced defects can significantly alter the mechanical properties of a material. Radiation damage initiates from incident neutron by bombardment on solid material causing production and evolution of Frenkel defects. Since voids are formed due to aggregation of a large number of vacancies that cause dimensional changes and hence irradiation-induced swelling. In order to characterize the effect of irradiation defects, we have performed molecular dynamics (MD) simulations to investigate nanoindentation response of point defects and voids in Fe and their effects on mechanical parameters. …

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[Chapter 1 From] Viral Modernism: The Influenza Pandemic And Interwar Literature, Elizabeth Outka Jan 2019

[Chapter 1 From] Viral Modernism: The Influenza Pandemic And Interwar Literature, Elizabeth Outka

Bookshelf

The influenza pandemic of 1918–1919 took the lives of between 50 and 100 million people worldwide, and the United States suffered more casualties than in all the wars of the twentieth and twenty-first centuries combined. Yet despite these catastrophic death tolls, the pandemic faded from historical and cultural memory in the United States and throughout Europe, overshadowed by World War One and the turmoil of the interwar period. In Viral Modernism, Elizabeth Outka reveals the literary and cultural impact of one of the deadliest plagues in history, bringing to light how it shaped canonical works of fiction and poetry. …

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[Introduction To] Constructing The Adolescent Reader In Contemporary Young Adult Fiction, Elisabeth Rose Gruner Jan 2019

[Introduction To] Constructing The Adolescent Reader In Contemporary Young Adult Fiction, Elisabeth Rose Gruner

Bookshelf

This book examines the way young adult readers are constructed in a variety of contemporary young adult fictions, arguing that contemporary young adult novels depict readers as agents. Reading, these novels suggest, is neither an unalloyed good nor a dangerous ploy, but rather an essential, occasionally fraught, by turns escapist and instrumental, deeply pleasurable, and highly contentious activity that has value far beyond the classroom skills or the specific content it conveys. After an introductory chapter that examines the state of reading and young adult fiction today, the book examines novels that depict reading in school, gendered and racialized reading, …

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[Introduction To] Animate Literacies: Literature, Affect, And The Politics Of Humanism, Nathan Snaza Jan 2019

[Introduction To] Animate Literacies: Literature, Affect, And The Politics Of Humanism, Nathan Snaza

Bookshelf

In Animate Literacies Nathan Snaza proposes a new theory of literature and literacy in which he outlines how literacy is both constitutive of the social and used as a means to define the human. Weaving new materialism with feminist, queer, and decolonial thought, Snaza theorizes literacy as a contact zone in which humans, nonhuman animals, and nonvital objects such as chairs and paper all become active participants. In readings of classic literature by Kate Chopin, Frederick Douglass, James Joyce, Toni Morrison, Mary Shelley, and others, Snaza emphasizes the key roles that affect and sensory experiences play in literacy. Snaza upends …

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[Introduction To] Soda Goes Pop: Pepsi-Cola Advertising And Popular Music, Joanna K. Love Jan 2019

[Introduction To] Soda Goes Pop: Pepsi-Cola Advertising And Popular Music, Joanna K. Love

Bookshelf

From its 1939 “Nickel, Nickel” jingle to pathbreaking collaborations with Michael Jackson and Madonna to its pair of X Factor commercials in 2011 and 2012, Pepsi-Cola has played a leading role in drawing the American pop music industry into a synergetic relationship with advertising. This idea has been copied successfully by countless other brands over the years, and such commercial collaboration is commonplace today—but how did we get here? How and why have pop music aesthetics been co-opted to benefit corporate branding? What effect have Pepsi’s music marketing practices in particular had on other brands, the advertising industry, and popular …

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Enhanced Quantum Dots Spontaneous Emission With Metamaterial Perfect Absorbers, Wei Wang, Xiaodong Yang, Ting S. Luk, Jie Gao Jan 2019

Enhanced Quantum Dots Spontaneous Emission With Metamaterial Perfect Absorbers, Wei Wang, Xiaodong Yang, Ting S. Luk, Jie Gao

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Metamaterial perfect absorbers (PAs) made of a hexagonal array of holes on Ag-SiO 2 -Ag thin films have been realized and utilized to enhance the spontaneous emission rate and photoluminescence intensity of CdSe/ZnS quantum dots (QDs) spin-coated on the absorber top surface. Perfect absorption of incoming light occurs at the wavelength where the impedance is matched to that of the free space. When QDs strongly excite both the electric and magnetic resonances at this perfect absorption wavelength, a significant Purcell effect on the spontaneous emission process and enhanced radiative outcoupling of photoluminescence intensity are expected. For perfect absorbers with near-unity …

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