Digital Commons Network^™

Establishing The Legal Framework To Regulate Quantum Computing Technology, Kaya Derose

Catholic University Journal of Law and Technology

No abstract provided.

Hahn-Hamiltonian Systems, Bi̇lender Paşaoğlu, Hüseyi̇n Tuna

Turkish Journal of Mathematics

In this paper, we study the basic theory of regular Hahn-Hamiltonian systems. In this context, we establish an existence and uniqueness result. We introduce the corresponding maximal and minimal operators for this system and some properties of these operators are investigated. Moreover, we give a criterion under which these operators are self-adjoint. Finally, an expansion theorem is proved.

A Study On Conformable Fractional Version Of Bullen-Type Inequalities, Fati̇h Hezenci̇, Hüseyi̇n Budak, Hasan Kara

Turkish Journal of Mathematics

In this paper, we give an equality for the case of differentiable convex functions involving conformable fractional integrals. Bullen-type inequalities for the conformable fractional integrals are established by using this equality. Some important inequalities are obtained by taking advantage of the convexity, the Hölder inequality and the power mean inequality. By using special choices, we present some known results in the literature. Furthermore, we give an example using a graph in order to show that our main results are correct.

The Mystery Of The Missing Megafauna, Maggie Colangelo, Bernard Means

Virtual Curation Lab's Comic Publications

The creative team behind Founding Monsters and Founding Monsters Tales have created a new comic that takes a more scientific and less historic approach to the giant mammals that once roamed North America. The Mystery of the Missing Megafauna explores how changing climate impacted biodiversity and megafauna populations in North America at the end of the last Ice Age. Particular attention is placed on the extinction of mastodons, mammoths, giant ground sloths and other megafauna whose fossils are found at Saltville in southwestern Virginia. This comic draws a connection to contemporary climate change and the major extinctions happening today. The …

A Hybrid Multifunctional Physicochemical Sensor Suite For Continuous Monitoring Of Crop Health, Nafize Ishtiaque Hossain, Shawana Tabassum

Electrical Engineering Faculty Publications and Presentations

This work reports a first-of-its-kind hybrid wearable physicochemical sensor suite that we call PlantFit for simultaneous measurement of two key phytohormones, salicylic acid, and ethylene, along with vapor pressure deficit and radial growth of stem in live plants. The sensors are developed using a low-cost and roll-to-roll screen printing technology. A single integrated flexible patch that contains temperature, humidity, salicylic acid, and ethylene sensors, is installed on the leaves of live plants. The strain sensor with in-built pressure correction capability is wrapped around the plant stem to provide pressure-compensated stem diameter measurements. The sensors provide real-time information on plant health …

Incorporation Of Poly(Tfema) In Perovskite Thin Films Using A Supercritical Fluid, Kasey Handy, Gary C. Tepper

Mechanical and Nuclear Engineering Publications

A new process is reported for the incorporation of a fluoropolymer into a solid perovskite film. Poly(trifluoroethyl methacrylate) [CH₂C(CH₃)(CO₂CH₂CF₃)]_n was delivered to methylammonium lead iodide (CH₃NH₃PbI₃) perovskite films by crystallizing the film in supercritical carbon dioxide/ethanol containing the dissolved fluoropolymer. The surface was characterized before and after fluoropolymer exposure using scanning electron microscopy, Raman spectroscopy, and contact angle measurements. The results indicate that the fluoropolymer was incorporated into the perovskite film during the supercritical fluid crystallization process. The incorporation of a hydrophobic fluoropolymer …

Blockchain Adoption And The Volatility Of Bitcoin And Ethereum, Carlos Humberto Muñoz Valdez

Dissertations from the Executive Doctorate in Business Administration Program

Cryptocurrencies and blockchain technology have gained a lot of interest in recent years either as an investment alternative or due to their practical applications. Even though it all started with a humble paper written by Satoshi Nakamoto in 2008, the market value of cryptocurrencies reached $3 trillion during their peak in 2021. As cryptocurrencies and blockchain technology evolve, their adoption and common use may impact how prices of digital currencies like Bitcoin and Ethereum behave in the markets. This dissertation looks for a potential connection between the creation of smart contracts in the Ethereum Virtual Machine and the return and …

Bridging The Mathematics Gap Through The Use Of Mathematical Apps, Ma. Louise Antonette N. De Las Penas, Debbie Marie B. Verzosa, Maria Alva Q. Aberin, Agnes D. Garciano, Juan Carlo F. Mallari, Jumela F. Sarmiento, Mark Anthony C. Tolentino

Mathematics Faculty Publications

During the COVID-19 pandemic, school campuses worldwide were forced to close, and students had to learn primarily from home. This sudden disruption is estimated to have caused significant learning loss among learners. This paper reports the use of mathematical applications (apps) to bridge the mathematical learning gaps in Grades 1 to 11 in the Philippines after the pandemic, as part of a project funded by a national government agency. The apps include those that strengthen foundational concepts in number and fraction sense in grade school mathematics, develop proving skills in geometry, promote mastery in algebraic and trigonometry through drill and …

Resilience Theory And Coerced Resilience In Agriculture, S. M. Sundstrom, D. G. Angeler, C. R. Allen

School of Natural Resources: Documents and Reviews

No abstract provided.

Storms And Ph Of Dam Releases Affects Downstream Phosphorus Cycling In An Arid Regulated River, B. R. Deemer, R. H. Reibold, A. Fatta, J. R. Corman, C. B. Yackulic, S. C. Reed

School of Natural Resources: Documents and Reviews

No abstract provided.

Modified Tracer Gas Injection For Measuring Stream Gas Exchange Velocity In The Presence Of Significant Temperature Variation, C. R. Jensen, D. P. Genereux, T. E. Gilmore, D. K. Solomon

School of Natural Resources: Documents and Reviews

No abstract provided.

Characterization Of Particulate Size Distributions And Water-Soluble Ions Measured At A Broiler Farm, P. J. Silva, T. Cress, R. Drover, C. Michael, G. Docekal, P. Larkin, A. Godoy, D. A. Cavero, C. Sin, J. Waites, Rezaul Mamood, M. Cohron, K. L. Purvis-Roberts

School of Natural Resources: Documents and Reviews

No abstract provided.

The Other Side Of The Acess Pyramid: A Healing, Sidney Shaw, M Rides At The Door

Walden Faculty and Staff Publications

No abstract provided.

The Effectiveness Of A Distance Training Program To Develop The Skills Of Using The Internet Of Things Among Teachers, Abdulrzak Mohammed Alqoot

Journal of Imam Abdulrahman Bin Faisal for Humanities and Educational Sciences

The educational systems, with all their components, were affected by the manifestations of the Fourth Industrial Revolution with numerous innovations. The Internet of Things (IoT) is one of the significant innovations that improves the teaching and learning environment. Therefore, it is important to keep up with the digital age by shifting from traditional classrooms to electronic platforms, and developing digital curricula and creative teaching methods that focus on the learner. This study aimed to assess the effectiveness of a training program designed to increase teachers› knowledge and skills about the IoT and its applications in educational settings. The training program …

Use Of Inner/Outer Sphere Terminology In Electrochemistry—A Hexacyanoferrate Ii/Iii Case Study, John Cassidy, Rafaela Cristina De Carvalho, Tony Betts

Articles

Salts of hexacyanoferrate II/III anions have been widely used as redox couple probe molecules to determine the characteristics of electrode surfaces. Examples include the assessment of electrocatalysts for energy applications and electrocatalysts for the detection of biological or chemical species, as well as the determination of electrochemically active surface areas. An examination of the electrochemical literature, based largely on cyclic voltammetric investigations, reveals a wide range of peak separation and/or heterogeneous electron transfer rate constants, classified sometimes as inner or outer sphere electron transfer processes. Originally developed for the mechanistic interpretation of inorganic transition metal compounds in solution, this terminology …

Modeling Self-Diffusiophoretic Janus Particles In Fluid, Kausik Das

HMC Senior Theses

We explore spherical Janus particles in which a chemical reaction occurs on one face, depleting a substrate in the suspending fluid, while no reaction occurs on the other face. The steady state concentration field is governed by Laplace’s equation with mixed boundary conditions. We use the collocation method to obtain numerical solutions to the equation in spherical coordinates. The asymmetry of the reaction gives rise to a slip velocity that causes the particle to move spontaneously in the fluid through a process known as self-diffusiophoresis. Using the Lorentz reciprocal theorem, we obtain the swimming velocity of the particle. We extend …

Multilayer Network Model Of Gender Bias And Homophily In Hierarchical Structures, Emerson Mcmullen

HMC Senior Theses

Although women have made progress in entering positions in academia and
industry, they are still underrepresented at the highest levels of leadership.
Two factors that may contribute to this leaky pipeline are gender bias,
the tendency to treat individuals differently based on the person’s gender
identity, and homophily, the tendency of people to want to be around those
who are similar to themselves. Here, we present a multilayer network model
of gender representation in professional hierarchies that incorporates these
two factors. This model builds on previous work by Clifton et al. (2019), but
the multilayer network framework allows us to …

A Visual Tour Of Dynamical Systems On Color Space, Jonathan Maltsman

HMC Senior Theses

We can think of a pixel as a particle in three dimensional space, where its x, y and z coordinates correspond to its level of red, green, and blue, respectively. Just as a particle’s motion is guided by physical rules like gravity, we can construct rules to guide a pixel’s motion through color space. We can develop striking visuals by applying these rules, called dynamical systems, onto images using animation engines. This project explores a number of these systems while exposing the underlying algebraic structure of color space. We also build and demonstrate a Visual DJ circuit board for …

The Russo-Ukrainian Pre-War Crisis: A Comparative Test Of Rational Choice, Expected Utility, Poliheuristic, And Prospect Theories To Explain The War's Outbreak, Daniel J. Reisner

Ph.D. Dissertations (Open Access)

This mixed approach study seeks to identify the most likely crisis-related decision-making strategies that President Biden, Zelensky, and Putin adopted during the Russo-Ukrainian pre-war crisis. The dissertation tests rational choice, expected utility, poliheuristic, and prospect theory frameworks against five critical decisions. The findings indicate that a Prospect Theory-based framework provides the most accurate predictions of the four models. Further, the study’s incidental finding highlights the salience of politics in decision-making, concluding that a simple lexicographic decision rule grounded in political interests accurately predicts and explains each leader’s choices more reliably and parsimoniously than the other frameworks and just as elegantly.

Advanced Thermoluminescence Spectroscopy As A Research Tool For Semiconductor And Photonic Materials: A Review And Perspective, Farida Selim

Physics and Astronomy Faculty Publications

Thermoluminescence (TL) or thermally stimulated luminescence (TSL) spectroscopy is based on liberating charge carriers from traps in the bandgap by providing enough thermal energy to overcome the potential barrier of the traps. It provides a powerful tool to measure the positions of the localized states/traps in the bandgap. Despite that, its applications in semiconductors are very limited. Herein, the basics of TL spectroscopy and the recent advances in the technique with focus on cryogenic thermally stimulated photoemission spectroscopy (C-TSPS) which extends TL measurements to cryogenic regime and allows the detection of very low concentrations of shallow and deep localized states …

High School Interrupted: A Case Study Of Postsecondary Pathways And College Choices Following The Covid-19 Pandemic, Robert Cook

Dissertations of Practice

This instrumental case study explored how the COVID-19 pandemic influenced post-secondary pathways and college choices of participants in an Upward Bound Program. In the aftermath of the pandemic, community college enrollment was projected to increase, instead two-year institutions experienced significant declines. Prevailing assumptions about college enrollment may not be accurate, and existing college decision models do not account for the effects of a worldwide pandemic. The study was guided by the Iloh model of college going decisions and trajectories, and the college-conocimiento framework. The findings suggested students’ academic engagement and mental health declined during the pandemic. This in turn impacted …

Placement Measures In Dual Credit: A Quantitative Study, Jessica I. Pickel

Dissertations of Practice

In response to the COVID-19 pandemic, the studied college broadened its eligibility criteria for dual credit to include an in-progress high school GPA. To determine whether the use of an-in progress GPA should be fully adopted as a placement measure, further study was needed. This quantitative study examined the relationship between the placement measures used before and during the COVID-19 pandemic and dual credit students’ access to and performance in the gateway ENGL 101 course taken at Prairieland Community College.

Data were collected from a small community college in the Midwestern region of the United States retrospectively over the academic …

Defining The Digital Twin For Industry 4.0, Zachary Anthony Dewardener

Open Access Master's Theses

This manuscript offers a comprehensive review of Digital Twin (DT) technology, first presenting the proposal of our novel DT amendment that looks to refine the conceptual understanding of DTs across various industrial use-cases. The study synthesizes findings from an extensive literature review, emphasizing the need for precise use-case-centric definitions and categorization to advance the field effectively. Chapter 1 introduces the current state of DT research, advocating for a more nuanced approach to the identification, classification, and validation of DT systems. It challenges the broad definitions prevalent in current literature and proposes a more application-specific research trajectory.

Subsequent chapters build on …

Bits 2023 Welcome Message From General Chairs And Tpc Chairs, Sajal K. Das, Keiichi Yasumoto, Hayato Yamana, Shameek Bhattacharjee

Computer Science Faculty Research & Creative Works

No abstract provided.

The “Who” In Engineering: Sociotechnical Engineering As Memorable And Relevant, Diana A. Chen, Marissa H. Forbes, Gordon D. Hoople, Susan M. Lord, Joel Alejandro Mejia

School of Engineering: Faculty Scholarship

Does emphasizing the role of people in engineering influence the memorability of engineering content? This study is part of a larger project through which our team developed a new undergraduate energy course to better reflect students’ cultures and lived experiences through asset-based pedagogies to help students develop a sociotechnical mindset in engineering problem solving. In this study, students in the class were invited to participate in semi-structured interviews (n=5) to explore our effectiveness in helping them develop a sociotechnical mindset around energy issues and conceptualize engineering as a sociotechnical endeavor. This study focuses on an activity during the interview where …

Controlled Release Of Flurbiprofen From 3d-Printed And Supercritical Carbon Dioxide Processed Methacrylate-Based Polymer, Truc T. Ngo, Jae D. Kim

School of Engineering: Faculty Scholarship

The ability to engineer and predict drug release behavior during treatment is critical to the design and implementation of effective drug delivery systems. In this study, a drug delivery system consisting of a methacrylate-based polymer and flurbiprofen was studied, and its release profile in a controlled phosphate-buffered saline solution was characterized. The polymer, which was 3D printed and processed in supercritical carbon dioxide under different temperature and pressure settings, showed sustained drug release over a prolonged period. A computer algorithm was used to determine the drug release time duration before reaching steady state and the maximum drug release at steady …

A New Method For Controlling Fractional Linear Systems, Subramanian V. Shastri, Kumpati S. Narendra, Lihao Zheng

School of Engineering: Faculty Scholarship

The study of fractional linear time-invariant (LTI) systems has been an area of active research over the past thirty years. Results indicate that such systems are becoming important in the representation of certain types of dynamical behavior in biology and engineering. Several methods have been developed for the representation, identification, and control of fractional LTI systems. The primary purpose of this paper is to introduce a new approach to their control. Its principal contribution is the transformation of a fractional LTI system into one without fractional terms (standard LTI system) using feedback and feedforward compensation. While the former may be …

“These Different Ideas, Traditions, And Values Make My Thinking Unique And Creative”: Bringing Native Hawaiian Ways Of Knowing To Engineering Education, Austin Morgan Kainoa Peters, Susan M. Lord

School of Engineering: Faculty Scholarship

Contribution: This article focuses on the study of Native Hawaiian student experiences in engineering education. Telling these stories illustrates the importance of legitimizing and appreciating different knowledge types in engineering as we move toward a more inclusive and sustainable field. Background: Native Hawaiian engineering students live oppressive realities due to the history of settler colonialism and occupation that attempted to erase their culture and ways of knowing, including in engineering education. This study shows how students overcome these realities to enact their ways of knowing in a field where it is not always respected. Informing the field of ways to …

Addressing Multilingual Learners’ Language Needs Through Engaging Inquiry-Based Science, Viviana Alexandrowicz, Bobbi Hansen

School of Leadership and Education Sciences: Faculty Scholarship

This article presents an overview of a 3-year series of workshops on teaching and providing multilingual learners (MLs) with access to science by utilizing effective language development strategies. The workshops were delivered to primary teachers in California and included three different modules: (a) Think and Question Like a Scientist, (b) Observe and Record Like a Scientist through Science Notebooking, and (c) Argue Like a Scientist. The activities showcase effective, research-based second language acquisition (SLA) strategies, including providing comprehensible input via paraphrasing, using visual and media resources, gestures, and the student’s native language, and modeling tasks. Additionally, scaffolding academic language through …

Development And Initial Validation Of A Mathematics-Specific Spatial Vocabulary Scale, Zehra E. Ünal, Lisa M. Ridgley, Yaoran Li, Cassandra Graves, Lora Khatib, Taryn Robertson, Perla Myers, David C. Geary

School of Leadership and Education Sciences: Faculty Scholarship

This study describes the development and initial validation of a mathematics-specific spatial vocabulary measure for upper elementary school students. Reviews of spatial vocabulary items, mathematics textbooks, and Mathematics Common Core State Standards identified 720 mathematical terms, 148 of which had spatial content (e.g., edge). In total, 29 of these items were appropriate for elementary students, and a pilot study (59 fourth graders) indicated that nine of them were too difficult (< 50% correct) or too easy (> 95% correct). The remaining 20 items were retained as a spatial vocabulary measure and administered to 181 (75 girls, mean age = 119.73 months, SD =4.01) fourth graders, along …