Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 78151 - 78180 of 1114149

Full-Text Articles in Entire DC Network

Persistent Tailoring Of Msc Activation Through Genetic Priming, Michael A Beauregard, Guy C Bedford, Daniel A Brenner, Leonardo D Sanchez Solis, Tomoki Nishiguchi, Santiago Carrero Longlax, Omid Veiseh, Pamela L Wenzel, Andrew R Dinardo, Isaac B Hilton, Michael R Diehl Sep 2024

Persistent Tailoring Of Msc Activation Through Genetic Priming, Michael A Beauregard, Guy C Bedford, Daniel A Brenner, Leonardo D Sanchez Solis, Tomoki Nishiguchi, Santiago Carrero Longlax, Omid Veiseh, Pamela L Wenzel, Andrew R Dinardo, Isaac B Hilton, Michael R Diehl

Faculty, Staff and Student Publications

Mesenchymal stem/stromal cells (MSCs) are an attractive platform for cell therapy due to their safety profile and unique ability to secrete broad arrays of immunomodulatory and regenerative molecules. Yet, MSCs are well known to require preconditioning or priming to boost their therapeutic efficacy. Current priming methods offer limited control over MSC activation, yield transient effects, and often induce the expression of pro-inflammatory effectors that can potentiate immunogenicity. Here, we describe a genetic priming method that can both selectively and sustainably boost MSC potency via the controlled expression of the inflammatory-stimulus-responsive transcription factor interferon response factor 1 (IRF1). MSCs engineered to …

Go to article

Zeolite-Promoted Platinum Catalyst For Efficient Reduction Of Nitrogen Oxides With Hydrogen, Shaohua Xie, Liping Liu, Yuejin Li, Kailong Ye, Daekun Kim, Hongliang Xin, Steven N Ehrlich, Fudong Liu Sep 2024

Zeolite-Promoted Platinum Catalyst For Efficient Reduction Of Nitrogen Oxides With Hydrogen, Shaohua Xie, Liping Liu, Yuejin Li, Kailong Ye, Daekun Kim, Hongliang Xin, Steven N Ehrlich, Fudong Liu

Faculty, Staff and Student Publications

Internal combustion engine fueled by carbon-free hydrogen (H2-ICE) offers a promising alternative for sustainable transportation. Herein, we report a facile and universal strategy through the physical mixing of Pt catalyst with zeolites to significantly improve the catalytic performance in the selective catalytic reduction of nitrogen oxides (NOx) with H2 (H2-SCR), a process aiming at NOx removal from H2-ICE. Via the physical mixing of Pt/TiO2 with Y zeolite (Pt/TiO2 + Y), a remarkable enhancement of NOx reduction activity and N2 selectivity was simultaneously achieved. The incorporation of Y zeolite effectively captured the in-situ generated water, fostering a water-rich environment surrounding the …

Go to article

On Explaining Why The (Human) World Is Rich, Bart J. Wilson Sep 2024

On Explaining Why The (Human) World Is Rich, Bart J. Wilson

ESI Working Papers

The wealth of the modern world is a natural historical marvel. Explaining it has traditionally been the purview of economic historians, as exemplified by the recent book How the World Became Rich by Mark Koyama and Jared Rubin. Economic historians, though, tend to only ask process-oriented “how” questions and “by what means” questions of the Great Enrichment. The eight co-authors of Explaining Technology, who are not economic historians, engage the debate asking a different question. Their goal is to explain the exponential shape of our enrichment with a model of the combinatorial evolution of technology. With an eye toward how …

Go to article

Modulational Instability Of Nonuniformly Damped, Broad-Banded Waves: Applications To Waves In Sea Ice, Raphael Stuhlmeier, Conor Heffernan, Alberto Alberello, Emilian Pǎrǎu Sep 2024

Modulational Instability Of Nonuniformly Damped, Broad-Banded Waves: Applications To Waves In Sea Ice, Raphael Stuhlmeier, Conor Heffernan, Alberto Alberello, Emilian Pǎrǎu

School of Engineering, Computing and Mathematics

This paper sets out to explore the modulational (or Benjamin-Feir) instability of a monochromatic wave propagating in the presence of damping such as that induced by sea ice on the ocean surface. The fundamental wave motion is modelled using the spatial Zakharov equation, to which either uniform or nonuniform (frequency-dependent) damping is added. By means of mode truncation the spatial analog of the classical Benjamin-Feir instability can be studied analytically using dynamical systems techniques. The formulation readily yields the free surface and its envelope, giving insight into the physical implications of damping on the modulational instability. The evolution of an …

Go to article

What Is Old Is New Again: The Reintegration Of Dresden’S Landscape Into The Modern German State, Richard Wolfel Sep 2024

What Is Old Is New Again: The Reintegration Of Dresden’S Landscape Into The Modern German State, Richard Wolfel

The Geographical Bulletin

This paper examines the architecture of Dresden in the era of East/West reunification. Traditional theories of German national development have identified three foci for post-World War II development, the Geopolitics of Nostalgia that seeks to return German national identity to an era prior to World War II, Zero Point thinking that seeks to build a new Germany from the ashes of World War II and critical preservation has sought to preserve some Nazi landscapes in an effort to facilitate discussion on the controversial era. Being an East German city, however, Dresden was isolated from the development of West German identity …

Go to article

A Breadth Review Of Digital Landscape And Related Foundational Theories, Jie Gao Fowler, Amy Watson Sep 2024

A Breadth Review Of Digital Landscape And Related Foundational Theories, Jie Gao Fowler, Amy Watson

Atlantic Marketing Journal

The dominating information technology of the present time is digital media. Platforms, like Facebook, Instagram, and TikTok encourage new types of connection, influencing friendships, family and peer groups, and business relationships while reshaping public involvement and discourse through influencers, memes, and viral media. However, algorithms dictate how social media is consumed, as well as the influence these platforms can have on individuals and society. As a result, the primary goal of this study is to investigate the impact of social media/artificial intelligence on society. This study examines the digital media ecosystem and its interaction with today's customers in depth. Furthermore, …

Go to article

Data-Driven Mathematical Modeling And Simulation Of Migration Dynamics During The Russian-Ukrainian War, Danielle Sitalo, Alonso Ogueda-Oliva, Padmanabhan Seshaiyer Sep 2024

Data-Driven Mathematical Modeling And Simulation Of Migration Dynamics During The Russian-Ukrainian War, Danielle Sitalo, Alonso Ogueda-Oliva, Padmanabhan Seshaiyer

Spora: A Journal of Biomathematics

In this work, we employ a governing system of ordinary differential equations (ODEs) to create a mathematical model for getting insights into the dynamics of migration of Ukrainians evacuating due to war. A suitable assumption on coefficients of this model results in the well-known logistic growth. Additionally, stability analyses of equilibrium solutions for these ODEs are performed, and we employ parameter estimation techniques to identify coefficients using online datasets via both a least-squares approach as well as a physics informed neural network approach. Our findings indicate that over time, the daily influx of Ukrainian refugees to Poland stabilizes at a …

Go to article

Casting Off, Claire Guyton Sep 2024

Casting Off, Claire Guyton

PoemMemoirStory (literary magazine)

pp. 115-122

Go to article

Techniques To Facilitate Smart Adaptive Quality Of Service, Supriya Kajabale, Roman Volkov, Brett Dunstan Sep 2024

Techniques To Facilitate Smart Adaptive Quality Of Service, Supriya Kajabale, Roman Volkov, Brett Dunstan

Defensive Publications Series

Managing network performance through Quality of Service (QoS) is essential but challenging due to the dynamic nature of networks and applications. Traditional QoS configurations are often static and manually intensive, leading to frequent errors and inefficiencies, particularly with critical applications. Proposed herein are techniques to facilitate an approach, referred to as Smart Adaptive QoS (SAdQoS) through which telemetry data can be leveraged to build and train machine learning (ML) models tailored to various business needs. These models can be trained on-premise, using real-time telemetry from the network in order to predict traffic patterns and generate adaptive QoS configurations. By automating …

Go to article

Application Of Haines And Terbrugge Chart For Suitable Slope Angles – A Case Study Of Artisanal And Small-Scale Mining, Carol Mgiba, Steven Rupprecht Sep 2024

Application Of Haines And Terbrugge Chart For Suitable Slope Angles – A Case Study Of Artisanal And Small-Scale Mining, Carol Mgiba, Steven Rupprecht

Journal of Sustainable Mining

Significant hazards in Artisanal and small-scale mining (ASM) are rock failure and slope collapse caused by overly steep pit walls, poor mine design and water pressure. There is a lack of expertise and capital in ASM. Providing a simple and cost-effective slope stability analysis and designing systems that can mitigate the risk of slope collapse is essential. This article aims to assess whether stability charts and estimations can be used to establish suitable slope angles to mitigate the overwhelming cases of slope collapse in ASM. The Bieniawski’s Rock Mass Rating system and Heins and Terbrugge stability chart were used to …

Go to article

Automated Internationalization Testing Using A Large Language Model, Tracy Wang, Wendy Dai Sep 2024

Automated Internationalization Testing Using A Large Language Model, Tracy Wang, Wendy Dai

Defensive Publications Series

Localization processes ensure that devices and software function correctly and consistently across different languages and for users of different cultures. Internationalization (i18n) testing is an important component of the localization process. Traditional i18n testing techniques are time-consuming, expensive, and difficult to scale since such testing involves substantial manual work. Furthermore, the tests can be of variable quality. This disclosure describes the use of a large language model (LLM) to automatically generate test cases for various internationalization (i18n) scenarios and to validate results generated by the software under test. Test cases are automatically generated by using a LLM to translate to …

Go to article

Review Of Hardware Implementation For The Two-Wheeled Self-Balancing Robot, Ghaidaa Hadi Salih Elias Sep 2024

Review Of Hardware Implementation For The Two-Wheeled Self-Balancing Robot, Ghaidaa Hadi Salih Elias

Al-Bahir

The working principle of a self-balancing robot is similar to that of an inverted pendulum, with the mobile robot's controller playing a crucial part in both self-balancing and stabilization. It is the kind that constantly modifies itself to keep balance when it rides on two wheels. This review will center on the basic construction of the suggested robot, summarize the recent studies relative to control methods and the building of the two-wheeled self-balancing robot, and discuss the outcomes of control experiments conducted on hardware systems. It will assist researchers in building and designing two-wheeled mobile robots in the future.

Go to article

Control Method Of Serial / Parallel Boosting System With E-Boosting Devices Sep 2024

Control Method Of Serial / Parallel Boosting System With E-Boosting Devices

Defensive Publications Series

Two-stage turbochargers are often used for IC engines to achieve higher overall pressure ratios resulting in increased the power density within the short duration of the intake valve opening. A typical two stage application may use the first turbocharger for pre-compressing the air (low pressure compressor) while the second compressor lifts the boost pressure to the desired level. A serial compressor and parallel turbine configuration often causes knocking and control issues for engine because of different pressure in different manifolds. The proposed solution uses electric motors on both the shafts to maintain desired pressure in exhaust manifolds.

Go to article

Integrated Cast Noise Suppressor On Compressor Housing With Ported Shroud Sep 2024

Integrated Cast Noise Suppressor On Compressor Housing With Ported Shroud

Defensive Publications Series

Ported Shroud for a compressor housing allows air from downstream of compressor wheel inducer to recirculate back to upstream in order to increase flow stability and avoid surge. However, this results in an increase in noise produced by the compressor. Noise suppressors that are typically added at the inlet to address this problem make inlet assembly complex and increase the cost. The proposed solution addresses this issue with a novel design of a ported shroud in which noise suppressor is integrated into the compressor inlet and cast as a single component.

Go to article

A Qualitative Evaluation Of Exercise Habits And Stress Management Strategies Among Exercise Physiology Freshmen, Lori A. Sherlock, E J. Ryan, Miriam E. Leary Sep 2024

A Qualitative Evaluation Of Exercise Habits And Stress Management Strategies Among Exercise Physiology Freshmen, Lori A. Sherlock, E J. Ryan, Miriam E. Leary

Educational Practices in Kinesiology

Transitional phases of life (i.e., the passage from high school to college) can promote heightened stress levels resulting in physical and mental challenges. College students are at an elevated risk for common mental health disorders with 20-45% of all college students being impacted within a given year. This may be, in part, due to their exposure to a multitude of new stressors related to academics, social challenges, personal concerns, and economic issues. Therefore, the purpose of this qualitative study was to examine exercise habits and stress management strategies among incoming freshmen in an exercise physiology program. The overall goal of …

Go to article

Editorial: Centering Humanism In Stem Education, Desirée Forsythe, Sheila S. Jaswal, Bryan Dewsbury, Susannah Mcgowan Sep 2024

Editorial: Centering Humanism In Stem Education, Desirée Forsythe, Sheila S. Jaswal, Bryan Dewsbury, Susannah Mcgowan

Biology, Chemistry, and Environmental Sciences Faculty Books and Book Chapters

"To understand why this Research Topic exists, it is important to recall the original goal from our call for proposals: to reorient STEM researchers and practitioners to reconsider the actual purpose of the practice of teaching and learning. Bryan Dewsbury often invokes us in his writing and talks to understand our why. As educators, we wish to provide insights, practices, and proposed theories to reflect on our WHY in STEM education—from one instructor’s empathetic approach to understanding the undergraduate student experience in gateway courses to the cultural initiation ceremonies at the disciplinary level. These components of humanism and the lens …

Go to article

Zoar Greer Church History, Zoar United Methodist Church, Greer Sep 2024

Zoar Greer Church History, Zoar United Methodist Church, Greer

Methodist Local Church Records

No abstract provided.

Go to article

Uc Agenda 2024-09-11, Northern Illinois University Sep 2024

Uc Agenda 2024-09-11, Northern Illinois University

University Council Archives

No abstract provided.

Go to article

Spartan Daily, September 11, 2024, San Jose State University, School Of Journalism And Mass Communications Sep 2024

Spartan Daily, September 11, 2024, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily, 2024

Volume 163, Issue 8

Go to article

Brain-Wide Projections Of Mouse Dopaminergic Zona Incerta Neurons, Bono, Kenichiro Negishi, Yasmina Dumiaty, Monica Ponce, Titilayo Akinbode, Kayla Baker, C. Duncan Spencer, Elizabeth Mejia, Marina Guirguis, Alex Herbert, Arshad Khan, Melissa Chee Sep 2024

Brain-Wide Projections Of Mouse Dopaminergic Zona Incerta Neurons, Bono, Kenichiro Negishi, Yasmina Dumiaty, Monica Ponce, Titilayo Akinbode, Kayla Baker, C. Duncan Spencer, Elizabeth Mejia, Marina Guirguis, Alex Herbert, Arshad Khan, Melissa Chee

Departmental Papers (Biology)

No abstract provided.

Go to article

Evaluation Of Satellite-Based Remote Sensing Methods For Monitoring Of Winter-Flooding Of Agricultural Fields For Migratory Birds, Thomas Patrick Dill Sep 2024

Evaluation Of Satellite-Based Remote Sensing Methods For Monitoring Of Winter-Flooding Of Agricultural Fields For Migratory Birds, Thomas Patrick Dill

Student Theses and Dissertations

Agricultural land conversion in Arkansas has caused the loss of 72% of wetland habitat, reducing wintering ground for migratory birds. Winter-flooded agriculture fields resemble seasonal wetlands. Federal agencies and private organizations have recognized the importance of this and have invested millions of dollars in subsidies. While remote sensing has been used in wildlife management, there is currently no method to remotely track adoption or monitor fields. To create this ability, we examined four spectral indices: normalized difference vegetation index (NDVI), normalized difference water index (NDWI), and two different versions of the modified normalized difference water index (MNDWI). We also compared …

Go to article

Understanding Teacher Perceptions Of Intentionally Nurturing Students' Social And Emotional Competencies In The General Education Classroom, Chelsea Austin Clark Sep 2024

Understanding Teacher Perceptions Of Intentionally Nurturing Students' Social And Emotional Competencies In The General Education Classroom, Chelsea Austin Clark

Student Theses and Dissertations

This dissertation explores the perceptions and understandings of K-6 general education teachers regarding their role in intentionally developing students’ emotional competencies. This research builds upon that which establishes the vitality of developed emotional competencies by including the perceptions of teachers who have been tasked with working directly with students’ social-emotional development. The goal of the study was to offer an approach to understanding teacher knowledge and preparedness regarding social-emotional learning in the general education classroom to provide a clear understanding of how teachers’ classroom experiences have shaped their perceptions of intentionally nurturing students’ social-emotional development. The guiding research questions of …

Go to article

Effect Of Social Impact Project On Student Motivation, Engagement, And Achievement, Jayna Lise Moffit Sep 2024

Effect Of Social Impact Project On Student Motivation, Engagement, And Achievement, Jayna Lise Moffit

Student Theses and Dissertations

The study’s purpose is to determine how student voice, empowerment, and empathy influence student motivation to affect student leadership, impactor identity, and academic achievement, students long-term, and the school culture at large. The self-determination theory is the study’s conceptual framework, which assumes individuals are behaviorally driven by the need to grow and gain fulfillment using the internal universal needs of competency, autonomy, and relatedness. Based upon a case study design with a reflexive latent thematic analysis, the researcher collected qualitative data using snowball sampling from students, teachers, and school leaders from a local junior high who each participated in a …

Go to article

Exploring The Recruitment And Retention Experiences Of Black Male K-12 Teachers In California’S Central Valley And Their Perceived Impact On Students, Leonard Jones Sep 2024

Exploring The Recruitment And Retention Experiences Of Black Male K-12 Teachers In California’S Central Valley And Their Perceived Impact On Students, Leonard Jones

Student Theses and Dissertations

This study delves into the recruitment and retention challenges faced by Black male K-12 teachers in California's Central Valley, shedding light on their perceived impact on students. The underrepresentation of Black male teachers, comprising only two percent of the national teacher workforce and less than one percent in California, underscores the urgency of examining their experiences regarding recruitment, retention, and influence on students. Employing Critical Race Theory as a conceptual framework, the study aims to amplify the self-reported lived experiences of Black male K-12 teachers through the lens of gender and culture, specifically within the Central Valley region. Employing a …

Go to article

Developing Decision Support Tools To Optimize Crop Production Using Uav-Based Multispectral Imagery, Fared Farag Sep 2024

Developing Decision Support Tools To Optimize Crop Production Using Uav-Based Multispectral Imagery, Fared Farag

Student Theses and Dissertations

Multispectral imagery collected through unmanned aerial vehicles (UAVs) holds promise for optimizing crop production to meet the rising market demands. This study aimed to enhance the main two facets behind the UAV data pipeline: data collection and data analysis. Chapter II addresses data collection challenges by presenting a software tool designed to assist UAV operators in validating and identifying potential errors in the collected images. Through beta testing, the software effectively reduced operational costs and laid a solid foundation for subsequent data analysis. Chapter III delves into the data analysis facet to develop advanced modeling approaches for accurate and robust …

Go to article

Teachers’ And School Leaders’ Perceptions Of A Community School Model’S Impact On Student Achievement, Kelsey Brabo Sep 2024

Teachers’ And School Leaders’ Perceptions Of A Community School Model’S Impact On Student Achievement, Kelsey Brabo

Student Theses and Dissertations

Community schools are a national initiative gaining traction due to the recent identification of the community school model as an evidence-based approach to education that satisfies requirements set forth by the Every Student Succeeds Act. The community school model centers around four pillars: integrated student support, extended and enriched learning opportunities, active family and community engagement, and shared leadership. With rapidly rising poverty rates and the expansion of community schools across the country, there is a need to ensure the efficiency and effective implementation of the community school model. The problem addressed in this qualitative case study is that the …

Go to article

Teacher Perceptions Of Reading And Mathematics Achievement Gaps Among Elementary Students Resulting From The Covid-19 Pandemic, Kayla Lynn Caprio Sep 2024

Teacher Perceptions Of Reading And Mathematics Achievement Gaps Among Elementary Students Resulting From The Covid-19 Pandemic, Kayla Lynn Caprio

Student Theses and Dissertations

The purpose of this descriptive qualitative case study was to discover Second through Fifth Grade rural North Texas teacher perceptions focusing on reading and mathematics student achievement gaps resulting from the COVID-19 pandemic. This study explores how the COVID-19 pandemic shutdown affected students not only academically but also socially as well. Through a qualitative case study design, this study collected qualitative data by interviewing seven-Second through Fifth Grade teachers through semi-structured interviews, a focus group, and MAP data by analyzing MAP data collected in the beginning and middle of the year from the 2019-2023 school years. The social learning theory …

Go to article

Factors Influencing The Selection And Change Of Major For Students At Historically Black Colleges And Universities, David Allen Sep 2024

Factors Influencing The Selection And Change Of Major For Students At Historically Black Colleges And Universities, David Allen

Student Theses and Dissertations

This qualitative exploratory study investigated the selection and change of majors for nine HBCU (Historically Black Colleges and Universities) students. The study included individual structured interviews that provided data that answered the following research questions: 1) what factors influenced the initial selection of major, and 2) what factors influenced the change of major? Bronfenbrenner's ecological theory (BET), utilizing each of the five layers, was used as the theoretical framework to understand how the students’ backgrounds or their ecology influenced major choices. Participants were asked at the end of the interviews how their change of major impacted their graduation timing. Results …

Go to article

Rehabilitation Of Urban Heritage To Revive Heritage Villages In Ad Dair Governorate In Jazan Province Of The Kingdom Of Saudi Arabia (Dra'al-Khatm Heritage Village: Case Study), Meaeel Raee Alraithi Sep 2024

Rehabilitation Of Urban Heritage To Revive Heritage Villages In Ad Dair Governorate In Jazan Province Of The Kingdom Of Saudi Arabia (Dra'al-Khatm Heritage Village: Case Study), Meaeel Raee Alraithi

Student Theses and Dissertations

This dissertation investigates the rehabilitation of urban heritage in Dra'Al-Khatm village within Ad Dair Governorate, Jazan Province, Saudi Arabia, emphasizing the revival of heritage villages as essential cultural, social, and economic resources. Urban heritage, defined by its tangible elements and historical depth, plays a pivotal role in representing civilizations and defining cultural identity. Despite its value, urban heritage in Saudi Arabia faces threats from modernization and neglect, leading to the deterioration of historical sites and villages. This study focuses on Dra'Al-Khatm village, a site of significant historical and architectural value, yet currently in a state of deterioration. The research adopts …

Go to article

Mechanical Behavior Of Nixcr Alloys With Ti3sic2 Nanoparticle Inclusions Using Molecular Dynamics, Brendan Martin Crutchfield Sep 2024

Mechanical Behavior Of Nixcr Alloys With Ti3sic2 Nanoparticle Inclusions Using Molecular Dynamics, Brendan Martin Crutchfield

Student Theses and Dissertations

Many materials used for solid lubrication are expensive and difficult to replace after abrasive wear, thus new compounds have to be considered and explored for their feasibility in solid lubrication. Nickel-chromium alloys are a potential replacement due to its high chemical and thermal stability, and Ti3SiC2 nanoparticle inclusions are considered to improve the wear rate of these materials. In this study, molecular dynamics (MD) simulations are utilized to assess the mechanical behavior of NixCr (x = 1, 2, 3, 4) alloys with and without Ti3SiC2 nanoparticle inclusions of radii 13, 20, and 27 Å. MD uniaxial tension tests are conducted …

Go to article

First Prev Next Last