Digital Commons Network^™

Unsorted Significance: Examining Potential Pathways To Extreme Political Beliefs And Communities On Reddit, Marcus Mann, Diana Zulli, Jeremy Foote, Emily Ku, Emily Primm

Purdue University Libraries Open Access Publishing Fund

Violent political extremists often point to online communities as motivating their behavior. However, researchers studying online exposure to extremism through structural mechanisms such as algorithms have not found strong evidence of their influence. At the same time, models of offline radicalization processes emphasize the importance of personal motivations, such as desire for significance and community, but do not fully account for online contexts. The authors integrate these approaches, which are both interested in worsening political extremism, asking, (1) What are the pathways to extreme content and communities online? and (2) What are the perceptions of extremism in online communities? Through …

A Literary Survey On The Challenges Of Adopting Lean In Aerospace Production And Aviation Maintenance, Seanan C. Lee

Journal of Aviation Technology and Engineering

Lean production began as a new method for creating value through the elimination of waste, continuous process improvement by workers, and fostering respect for people. Despite its success in other industries, the significantly lower production volume, the substantially higher complexity, and the service-oriented nature of aviation maintenance demand significant adaptation of Lean principles to be effective. The lack of a holistic study on Lean adoption for aerospace production and aviation maintenance organizations hinders transformation as the two industries are intertwined in product and characteristics. Lean adoption in aerospace production is hindered by the lingering notion that it is an ‘‘automotive …

Public Acceptance Of Guidance And Regulations For Space Flight Participation, Cory Trunkhill, Robert Joslin, Joseph Keebler

Journal of Aviation Technology and Engineering

Space flight participants are not professional astronauts and not subject to the rules and guidance covering space flight crewmembers. Ordinal logistic regression of survey data was utilized to explore public acceptance of current medical screening recommendations and regulations for safety risk and implied liability for civil space flight participation. Independent variables constituted participant demographic representations while dependent variables represented current Federal Aviation Administration guidance and regulations. Odds ratios were derived based on the demographic categories to interpret likelihood of acceptance for the criteria. Significant likely acceptance of guidance and regulations was found for five of twelve demographic variables influencing public …

Frequency Reduction And Attenuation Of The Tire Air Cavity Mode Due To A Porous Lining, Kyosung Choo, Won Hong Choi, Guochenhao Song, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

The tire air cavity mode is known to be a significant source of vehicle structure-borne road noise near 200 Hz. A porous lining placed on the inner surface of a tire is an effective countermeasure to attenuate that resonance. The two noticeable effects of such a lining are the reduction in the cavity resonance frequency and the attenuation of the air cavity mode. In this paper, through both theoretical and numerical analysis, the mechanisms underlyiing the effects of a porous lining were studied. A two-dimensional duct-shaped theoretical model and a torus-shaped numerical model were created to investigate the lined tire …

A Transfer-Matrix-Based Approach To Predicting Acoustic Properties Of A Layered System In A General, Efficient, And Stable Way, Guochenhao Song, Zhuang Mo, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

Layered materials are one of the most commonly used acoustical treatments in the automotive industry, and have gained increased attention, especially owing to the popularity of electric vehicles. Here, a method to model and couple layered systems with various layer types (i.e., poro-elastic layers, solid-elastic layers, stiff panels, and fluid layers) is derived that makes it possible to stably predict their acoustical properties. In contrast with most existing methods, in which an equation system is constructed for the whole structure, the present method involves only the topmost layer and its boundary conditions at two interfaces at a time, which are …

Iodinated Non-Ionic Contrast Medium Does Not Inhibit E. Coli Growth In Ex Vivo Inoculated Canine Urine, Maxime G. Derre, Sarah M. Steinbach, Gena K. Hendrix, Meggan Stanton, Larry G. Adams

Purdue University Libraries Open Access Publishing Fund

OBJECTIVE

To investigate the effect of iohexol on standardized quantitative urine culture results in dogs. The authors hypothesized that the presence of iohexol in inoculated urine samples would result in lower bacterial concentrations (CFU/mL) and, therefore, decrease culture sensitivity.

SAMPLE

Urine samples were aseptically collected during cystoscopy from a single client-owned dog untreated with antimicrobials.

PROCEDURES

An experimental controlled study. The urine sample was divided into 38 aliquots (0.5 mL each) that were used as negative controls or inoculated with an equal amount of Escherichia coli (105 CFU/mL). Different volumes (0.1 and 0.5 mL) of contrast or saline were added …

U-No: U-Shaped Neural Operators, Md Ashiqur Rahman, Zachary E Ross, Kamyar Azizzadenesheli

Department of Computer Science Faculty Publications

Neural operators generalize classical neural networks to maps between infinite-dimensional spaces, e.g., function spaces. Prior works on neural operators proposed a series of novel methods to learn such maps and demonstrated unprecedented success in learning solution operators of partial differential equations. Due to their close proximity to fully connected architectures, these models mainly suffer from high memory usage and are generally limited to shallow deep learning models. In this paper, we propose U-shaped Neural Operator (U-NO), a U-shaped memory enhanced architecture that allows for deeper neural operators. U-NOs exploit the problem structures in function predictions and demonstrate fast training, data …

The Future Of Mobility-As-A-Service: Trust Transfer Across Automated Mobilities, From Road To Sidewalk, Jacob G. Hunter, Elise Ulwelling, Matthew Konishi, Noah Michelini, Akhil Modali, Anne Mendoza, Jessie Snyder, Shashank Mehrotra, Zhaobo Zheng, Anil R. Kumar, Kumar Akash, Teruhisa Misu, Neera Jain, Tahira Reid

School of Mechanical Engineering Faculty Publications

While trust in different types of automated vehicles has been a major focus for researchers and vehicle manufacturers, few studies have explored how people trust automated vehicles that are not cars, nor how their trust may transfer across different mobilities enabled with automation. To address this objective, a dual mobility study was designed to measure how trust in an automated vehicle with a familiar form factor—a car—compares to, and influences, trust in a novel automated vehicle—termed sidewalk mobility. A mixed-method approach involving both surveys and a semi-structured interview was used to characterize trust in these automated mobilities. Results found that …

Combining Granular Aerogels With Additively Manufactured Porous Structures For Broadband Sound Absorption, L. Paige Nobles, Yutong Xue, J Stuart Bolton, Bhisham Sharma

Publications of the Ray W. Herrick Laboratories

Our recent investigation [1] showed that the absorption behavior of granular aerogel agglomerates with average particle diameters less than 50μm is dominated by periodically spaced, high absorption peaks and troughs. While the absorption peaks, especially at lower frequencies, are desirable from an engineering application perspective, overcoming the loss in high frequency performance remains a challenge. Furthermore, the practical application of granular aerogels is limited by the difficulty in handling them. In this work, we propose a new design for a broadband noise absorber achieved by layering the aerogel granules within a 3D printed porous network. The design provides …

Study Of The Impact Of Boundary Conditions On Acoustical Behavior Of Granular Materials And Their Implementation In The Finite Difference Method, Zhuang Mo, Guochenhao Song, Tongyang Shi, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

Granular materials display significant differences in their acoustical response when tested in a standing wave tube, compared with the behavior of more traditional sound absorbing materials such as fibrous webs and foams. The latter materials can often be modeled as an equivalent fluid with the further assumption that the material properties do not depend on the input signal level. In contrast, the level dependence of the acoustical behavior of granular materials has been observed in measurements of glass bubbles, as reported in previous studies, for example. When the input level is low, the absorption coefficient of the glass bubble stack …

Prediction Of Acoustical Behavior Of Granular Material Stacks As Measured In A Standing Wave Tube By Using A Biot Theory-Based Model, Zhuang Mo, Guochenhao Song, Tongyang Shi, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

The acoustical behavior of granular materials, such as activated carbon and silica gel, has drawn attention in recent studies, due to their favorable properties such as good low frequency sound absorption. Like other more traditional porous materials, granular materials can also be tested in a standing wave tube for a convenient assessment of their acoustical properties. However, the behavior of granular materials stacked in a standing tube is more complex than that of traditional materials. For example, the response of lightweight glass bubbles reveals a clear dependence on the sound pressure level of the input signal. Also, when tested in …

Identification Of Novel Anti-Amoebic Pharmacophores From Kinase Inhibitor Chemotypes, Lori Ferrins, Melissa J. Buskes, Madison M. Kapteyn, Hannah N. Engels, Suzanne E. Enos, Chenyang Lu, Dana M. Klug, Baljinder Singh, Antonio Quotadamo, Kelly Bachovchin, Westley F. Tear, Andrew E. Spaulding, Katherine C. Forbes, Seema Bag, Mitch Rivers, Catherine Leblanc, Erin Burchfield, Jeremy R. Armand, Rosario Diaz-Gonzalez, Gloria Ceballos-Perez, Raquel Garcia-Hernandez, Guiomar Perez-Moreno, Cristina Bosch-Navarrete, Claudia Gomez-Linan, Luis Miguel Ruiz-Perez, Francisco Gamarro, Dolores Gonzalez-Pacanowska, Miguel Navarro, Kojo Mensa-Wilmot, Michael P. Pollastri, Dennis E. Kyle, Christopher A. Rice

Purdue University Libraries Open Access Publishing Fund

Acanthamoeba species, Naegleria fowleri, and Balamuthia mandrillaris are opportunistic pathogens that cause a range of brain, skin, eye, and disseminated diseases in humans and animals. These pathogenic free-living amoebae (pFLA) are commonly misdiagnosed and have sub-optimal treatment regimens which contribute to the extremely high mortality rates (>90%) when they infect the central nervous system. To address the unmet medical need for effective therapeutics, we screened kinase inhibitor chemotypes against three pFLA using phenotypic drug assays involving CellTiter-Glo 2.0. Herein, we report the activity of the compounds against the trophozoite stage of each of the three amoebae, ranging from …

Continuing Education At Purdue University, 1975–2019, Thomas Robertson, Michael Eddy

Continuing Education

Continuing Education at Purdue University, 1975–2019 is intended to provide a follow-up to the monograph written by Dr. Frank K. Burrin after his retirement as director of Purdue Continuing Education in 1984, Continuing Education at Purdue University: The First Hundred Years (1874–1974). Burrin became ill shortly after his retirement, and he was not able to complete his project. His notes were later compiled, edited, and published by Elizabeth Boyd Thompson.

This monograph presents forty-five years of the history of Continuing Education and Conferences at Purdue under the leadership of eight deans and directors.

Design And Optimization Of Lightweight Porous Damping Treatments, Yutong Xue, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

Here, it is shown that properly-designed limp porous materials such as fibrous layers can provide damping equivalent to conventional viscoelastic dampers while providing advantages such as light weight and effective sound absorption. This then allows porous layers to be used as multi-functional noise and vibration control solutions in automotive and aerospace applications. It has also been found that the addition of bulk elasticity to the solid phase of the porous medium is beneficial since it improves damping performance compared to equivalent limp treatments. In this study, porous media, such as fibers and foams, were designed to serve as treatments for …

Stories Of Leadership: Leading With Empathy Through The Covid-19 Pandemic, Jennifer S. Linvill, Gloria O. Onosu

Purdue University Libraries Open Access Publishing Fund

Leader–follower interactions during times of complexity are critical in managing rapid change demands and ensuring organizational sustainability. Between early 2020 and 2023, many organizations worldwide witnessed an unprecedented need for organizational change that rapidly transformed the work environment. This study focused on understanding the contexts of leader and follower interactions during times of change using the shifting organizational landscapes of the COVID-19 pandemic. Applying a qualitative methodology, we collected data from 12 leaders across multiple business sectors in Africa, Asia, and the United States using semi-structured interviews. We then transcribed the interviews and applied an iterative phronetic approach to analyze …

Don’T “Just Google It”: Deweyan Perspectives On Participatory Learning With Online Tools, Eric Thomas Weber, Heather Cowherd, Mia Morales

Education and Culture

John Dewey argued that for education to be democratic, it is important for students to be not merely spectators but also participants in learning. Teachers sometimes find personal computing devices to be distracting or to contribute to passivity rather than activity in the classroom. In this essay we examine the question of whether a student’s Google search on a subject matter discussed in class is participatory or passive. We argue that with proper guidance students’ use of online searches and related tools can empower students democratically as sources of ideas, conceptualizations, information, and insight while emphasizing participation in deliberation and …

Information And Communications Technologies And Democratic Education: Lessons From John Dewey's Pragmatism, Jonathan Flowers

Education and Culture

This essay applies lessons from John Dewey’s theory of democracy and democratic education to the modern development of information communications technologies and the assertion that the development of such technologies will lead to a more open, more democratic society. Given the continuity of the technology and its applications with structures of oppression within modern society, any attempt to resolve or democratize technology through skills-based training is bound to fail, as this does not resolve the cultural habits that enable oppression through technology. To this end, what is necessary is democratic education that recognizes the unique contexts in which students become …

Data And Growth In Education: A Deweyan Analysis, Kevin Taylor

Education and Culture

For Dewey, growth in the educative process means education that enriches and expands one’s experience as it prepares students for not only a vocation but also entry into and transaction with the world. In few places can we see growth, generally understood, to be occurring as fast as in big data technology. This essay begins with an overview of what big data is, specifically what big data looks like in education as understood through learning management system platforms but also data as understood generally on a college campus through dataveillance, or data surveillance understood as the monitoring or possibility of …

Transtrauma: Conceptualizing The Lived Experiences Of Vietnamese American Youth, Khánh Lê

Journal of Southeast Asian American Education and Advancement

Drawing on empirical data from qualitative research I conducted with eight Vietnamese American youth in the Fall of 2020, this paper forwards transtrauma, a new framework for conceptualizing and understanding the lived experiences of Vietnamese American youth. The concept of transtrauma goes beyond the pathologizing of individual trauma, to examine how structures of domination inflict and extend trauma in marginalized communities, such as that of Vietnamese American communities. Transtrauma transcends the overt and linear focus on trauma as a single experience and the examination of how institutionalized violence by nation states shapes the experiences of Vietnamese Americans. This conceptualization …

Factors Associated With Handwashing Behaviors During The Covid-19 Pandemic: An Analysis Of The Community Health Survey In Korea, Soojung Jo, Soo-Yeon Han, Nancy Howe

School of Nursing Faculty Publications

Introduction: Handwashing is the most effective preventive behavior for coronavirus disease-19 (COVID-19) infection. However, research has shown the lower handwashing behaviors among Korean adults. Objectives: This study aims to analyze factors associated with handwashing as a preventive behavior for COVID-19 infection based on the health belief model (HBM) and the theory of planned behavior (TPB) behavioral theories. Methods: This secondary data analysis utilized the Community Health Survey developed by Disease Control and Prevention Agency conducted in 2020. Sampling method was stratified and targeted 900 people living in the territory of each community public health center. In total, 228,344 cases were …

Car-Neutrophil Mediated Delivery Of Tumor-Microenvironment Responsive Nanodrugs For Glioblastoma Chemo-Immunotherapy, Yun Chang, Xuechao Cai, Ramizah Syahirah, Yuxing Yao, Yang Xu, Gyuhyung Jin, Vijesh J. Bhute, Sandra Torregrosa-Allen, Bennett D. Elzey, You-Yeon Won, Qing Deng, Xiaojun Lance Lian, Xiaoguang Wang, Omolola Eniola-Adefeso, Xiaoping Bao

Purdue University Libraries Open Access Publishing Fund

Glioblastoma (GBM) is one of the most aggressive and lethal solid tumors in human. While efficacious therapeutics, such as emerging chimeric antigen receptor (CAR)-T cells and chemotherapeutics, have been developed to treat various cancers, their effectiveness in GBM treatment has been hindered largely by the blood-brain barrier and blood-brain-tumor barriers. Human neutrophils effectively cross physiological barriers and display effector immunity against pathogens but the short lifespan and resistance to genome editing of primary neutrophils have limited their broad application in immunotherapy. Here we genetically engineer human pluripotent stem cells with CRISPR/Cas9-mediated gene knock-in to express various anti-GBM CAR constructs with …

Covid-19: Visualized Qualitative Aviation Research Themes, Chien-Tsung Lu, Huabo Sun

Journal of Aviation Technology and Engineering

The purpose of this study is to review pandemic-related publications that help the aviation industry cope with pandemic outbreaks like that of COVID-19. Published documents were searched and downloaded from academic libraries including Web of Science for a qualitative analysis. After the triangulation of publications for decisionmakers, and researchers, all important research clusters were visually generated based on the VOSviewer process. Some research clusters were further discussed for a thorough understanding of existing research perspectives. The result discovered that wearing a face mask and vaccination have been the two most effective means to counteract pandemic outbreaks. Additional findings were extracted …

The Intersection Of Culturally Responsive Pedagogy And Engineering Design In Secondary Stem, Mariam Manuel, Jessica Gottlieb, Gina Svarovsky, Rebecca Hite

Journal of Pre-College Engineering Education Research (J-PEER)

The instructional practices of the engineering design process and culturally responsive pedagogy have each garnered national attention and multiple decades of research. Findings from the respective literature bases call for educators and policymakers to integrate these two pedagogical approaches into K-12 classroom instruction. Scholars have argued that this integration would improve student engagement and academic achievement. There is a significant amount of research that supports the positive student outcomes associated with each approach, yet there remains a dearth of literature that addresses the integration of these two practices into the science and mathematics content areas. The movement around educational reform …

Evaluación Y Rentabilidad De Variedades De Chile En Tres Granjas De Minnesota Y Wisconsin, 2022, Natalie Hoidal, Charlie Rohwer, Ryan Pesch, Rodrigo Cala, Javier García, Griselda Bernabe Suarez, Fernando Alejandro García Loyo

Midwest Vegetable Trial Reports

Los agricultores latinos de hortalizas frescas de Minnesota y Wisconsin están interesados en cultivar chiles picantes tanto frescos como deshidratados para su venta en mercados locales. Este ensayo de variedades es el tercero y último de un proyecto de tres años de duración. El ensayo incluyo 14 variedades de chile incluyendo jalapeño, serrano, habanero, poblano y "otros" tipos. Las variedades incluyeron las mejores variedades de 2020 y 2021 junto con nuevas variedades. Calculamos el rendimiento, tamaño y las unidades Scoville. Además del ensayo de variedades, realizamos un análisis empresarial para determinar la rentabilidad de la producción de chiles picantes en …

Chatgpt Applications On Security Standards Selection And Future Ai Application Trends In Cybersecurity, Young B. Choi

KAUPA Letters

As the powers of Artificial Intelligence is growing dramatically these days, people started to think about the potential applications of AI tools such as ChatGPT and similar tools in various domains. This paper explores the functions of Chat GPT on security standards selection processes and will introduce a brief history of recent advancement of AI with outstanding issues and recent development directions of Artificial Intelligence.

Kaupa Letters: Volume 10, Issue 4, Korean American University Professors Association

KAUPA Letters

No abstract provided.

Writing Beyond Campus: Writing Centers In Service-Learning And Community-Engaged Scholarship, Jacqueline Borchert, Noah Patterson, Nathan C. Mcburnett

Purdue Writing Lab/Purdue OWL Presentations

This roundtable discussion serves as a forum for writing center professionals to discuss past experiences with and future opportunities for community-engaged work in our field. The lessons learned from this discussion will be used to both (1) identify strategic opportunities for engagement between writing labs and their respective communities and (2) inform the ongoing development of online resources for instructors and students who wish to integrate writing into current and future university-community work.

A Comparison Of Airport Risks: Unmanned Aircraft Systems (Uas) Sightings, Wildlife Strikes, And Runway Incursions, Cheng Wang, Sarah M. Hubbard

Journal of Aviation Technology and Engineering

To provide a context for the potential threat of unmanned aircraft systems (UAS) sightings on airport operations, this paper compares the characteristics of UAS sightings with two common airport threats: wildlife strikes and runway incursions. This study analyzed over 60,000 events in a three-year period (September 2016 to August 2019), including 6,551 UAS sightings from the Federal Aviation Administration (FAA) UAS Sightings Report database, 47,574 wildlife strikes from the FAA Wildlife Strike database, and 6,041 runway incursions from the FAA Runway Safety database. The results suggest both similarities and differences among the airport threats. Both UAS sightings and wildlife strikes …

Safety Management Of Wildlife Hazards To Aviation: An Analysis Of Wildlife Strikes In Part 139 Airports In Florida 2011–2020, Tiago Dikerts De Tella, Flavio A. C. Mendonca

Journal of Aviation Technology and Engineering

Purpose: The purpose of this study was threefold: (1) to investigate wildlife strike reporting trends in Part 139 airports in the state of Florida (2011–2020); (2) to evaluate the existence of a difference in the rate of reported wildlife strikes between the seasons of the year (2011–2020); and (3) to develop information based upon the data analyzed that can be used for the safety management of wildlife hazards in Florida.
Design/methodology: The researchers in this study answered the research questions through the analyses, revision, and evaluation of existing wildlife strike and aircraft operations data. The data analyzed in this …

When Therapy Dogs Provide Virtual Comfort: Exploring University Students’ Insights And Perspectives, Christine Yvette Tardif-Williams, John-Tyler Binfet, Freya L. L. Green, Renata P. S. Roma, Akshat Singal, Camille X. Rousseau, Rebecca J. P. Godard

People and Animals: The International Journal of Research and Practice

With the proliferation of canine-assisted interventions and the emphasis placed on the impact of these sessions in bolstering the well-being of visitors to sessions, especially university students, it can be easy to overlook just how participating in one of these sessions is experienced by participants. Capturing participants’ experiences is important as this holds the potential to inform program design and delivery and elucidate mechanisms within the intervention that were found to be especially efficacious. Forging new empirical terrain, this study explored the insights and perceptions of 469 undergraduate students who participated in a virtual canine-assisted stress-reduction intervention at a mid-size …