Digital Commons Network^™

Agricultural Aerosols: The Impact Of Farming Activity On Ice Nucleating Particles, Joseph Robinson

The Journal of Purdue Undergraduate Research

Farming activities cause particles such as soil dust and plant material to be emitted into the air. Some of these aerosols can become ice nucleating particles (INPs), serving as seeds for ice and mixed-phase clouds. While there have been ground-based studies of these particles in the western Great Plains and a single air-based study in Indiana, there is a distinct lack of ground-based studies in the Midwest. In Indiana, over two-thirds of the state is farmland, with over 75% of land in Tippecanoe County used for agriculture. Despite farming being such an essential part of life in Indiana, the connection …

Exploring The Purdue Teacher Education Program: Focus On Diversity, Equity, And Social Justice, Julia Pirrello

The Journal of Purdue Undergraduate Research

During this time of heightened awareness of social injustices via Black Lives Matter protests, the #MeToo movement, and the COVID-19 pandemic, it is important to ensure that teacher preparation curriculum includes attention to knowledge and skills related to social justice issues in education. Th e purpose of this study was to investigate the ways in which social justice, diversity, and equity are addressed in the foundational courses of the Purdue Teacher Education Program (PTEP). McDonald (2005) proposed a framework in which social justice is integrated across all experiences (e.g., courses, activities, clinical placements) in a teacher education program. In an …

Investigating Influences On Intercultural Sensitivity Through Undergraduate And Graduate Students’ Reflections On Identities, Daphne Fauber, Kathryn Mueller

The Journal of Purdue Undergraduate Research

Due to a shifting global environment and unique personal circumstances, traditional in-person learning experiences that foster cross-cultural interactions and learning, including study abroad programs, have become unavailable to many. In light of this issue, we investigated how a virtual cross-cultural course, such as Global Social Justice in Education (GSJE), could allow undergraduate and graduate students to explore their cultural identities and enhance their intercultural sensitivity. Data for this study was collected via three distinct GSJE reflections completed by a single cohort of 11 Purdue graduate and undergraduate students who interacted with international participants. Purdue participant reflections were analyzed and coded …

Processing Of Plastic Film From Potato Starch: Effect Of Drying Methods, Kourtney Collier, Samantha Goins, Austin Chirgwin, Isabelle Stanfield

The Journal of Purdue Undergraduate Research

Starch-based plastics are biodegradable, compostable compounds made of starch and plasticizers from natural sources. Their fabrication involves the starch-plasticizer reaction at 70–100°C followed by cooling and drying. Th e most common drying method is air drying (natural convection), which is effective but slow. Th e objective of this work is to study the effect of fast drying (forced convection) on the quality of the plastic film. Th is work compares the effects of drying conditions and drying rate on warpage, shrinkage rate, and presence of bubbles. Five drying methods are studied: (1) natural convection with uncovered petri dish, (2) natural …

Supporting The Protect Initiative, Josh Lefton, Jackson Murray, Ahmed Thabet, Sriram Baireddy, Prakash Shukla, Mridul Gupta, Reagan Becker, Julie Ertle, Tony Doan, Aerin Yang

Purdue Journal of Service-Learning and International Engagement

Recently, medication dosage errors have received more political and media attention. Dosage errors are the most common medical errors, affecting about 1.5 million people annually.

Furthermore, U.S. poison-control centers reported more than 200,000 cases per year of medication errors. These cases result in medical costs of around $3.5 billion, and children under 6 years old constitute approximately 30% of these cases.

The PROTECT Initiative (Preventing Overdoses and Treatment Errors in Children Taskforce) was launched in 2008 as a collaborative effort between public health agencies and patient advocates to minimize dosage errors.

In alignment with the PROTECT Initiative effort, this project …

Optimizing Cybersecurity Budgets With Attacksimulation, Alexander Master, George Hamilton, J. Eric Dietz

Faculty Publications

Modern organizations need effective ways to assess cybersecurity risk. Successful cyber attacks can result in data breaches, which may inflict significant loss of money, time, and public trust. Small businesses and non-profit organizations have limited resources to invest in cybersecurity controls and often do not have the in-house expertise to assess their risk. Cyber threat actors also vary in sophistication, motivation, and effectiveness. This paper builds on the previous work of Lerums et al., who presented an AnyLogic model for simulating aspects of a cyber attack and the efficacy of controls in a generic enterprise network. This paper argues that …

Charting The Beyond. On The Two “First” International Surrealist Exhibitions In Scandinavia, Andrea Kollnitz

Artl@s Bulletin

This article examines two exhibitions introducing international surrealism in the North: Paris 1932 in Stockholm 1932 and Kubisme = Surrealisme in Copenhagen in 1935. Focusing on contents, networks and agents, the analysis shows competitive negotiations of national and local identities in interaction with the promotion of surrealism as a universal international phenomenon. Using a decentralising approach, the article reflects on the role of Paris and other cities as stations as well as elucidates national, transnational and transcultural processes and interactions in the international dissemination of surrealism.

Dismantling Institutional Whiteness: Emerging Forms Of Leadership In Higher Education, M. Cristina Alcalde, Mangala Subramaniam

Navigating Careers in Higher Education Series

Dismantling Institutional Whiteness: Emerging Forms of Leadership in Higher Education focuses on the experiences of women of color in leadership roles in higher education. Top roles historically have gone to white men, and leadership has not reflected the range of identities and people who make up higher education. Why? And why does this problem continue to this day? Most importantly, what can be done to bring about meaningful change?

Dismantling Institutional Whiteness gathers a range of first-person narratives from women of color and examines the challenges they face not only at a systemic level, but also at a deeply personal …

2022 Symposium On Education In Entertainment And Engineering, Mary K. Pillotte, Rich Dionne

Symposium on Education in Entertainment and Engineering

No abstract provided.

Revisiting The Relation Between Syntax, Action, And Left Ba44, David L. Kemmerer

Purdue University Libraries Open Access Publishing Fund

Among the many lines of research that have been exploring how embodiment contributes to cognition, one focuses on how the neural substrates of language may be shared, or at least closely coupled, with those of action. This paper revisits a particular proposal that has received considerable attention—namely, that the forms of hierarchical sequencing that characterize both linguistic syntax and goal-directed action are underpinned partly by common mechanisms in left Brodmann area (BA) 44, a cortical region that is not only classically regarded as part of Broca’s area, but is also a core component of the human Mirror Neuron System. First, …

“My Companion Through The Pandemic”: The Importance Of The Human-Animal Bond During Covid-19, Christine Krouzecky, Jan Aden, Anastasiya Bunina, Katharina Hametner, Armin Klaps, Zuzana Kovacovsky, Nora Ruck, Birgit Ursula Stetina

People and Animals: The International Journal of Research and Practice

The COVID- 19 pandemic, due to its global biopsychosocial effects, encourages re-search regarding the promotion of health. Studies in this area concentrate on the human–animal bond as a source of physical and psychological well- being (Shoesmith et al., 2021). In this context, contradictory results have been reported, which on the one hand underline the positive influences of animal companionship on humans’ well- being (Ratschen et al., 2020), and on the other hand demonstrate contrary effects (Mueller et al., 2021). Based on inconsistent findings, the present study aimed to investigate to what extent the human–animal bond influences different psychosocial parameters (including …

Thermodynamic Limits Of Atmospheric Water Harvesting, Akshay K. Rao, Andrew J. Fix, Yun Chi Yang, David M. Warsinger

School of Mechanical Engineering Faculty Publications

Atmospheric water harvesting (AWH) is a rapidly emerging approach for decentralized water production, but current technology is limited by trade-offs between energy consumption and yield. The field lacks a common basis to compare different AWH technologies and a robust understanding of the performance impacts of water recovery, desorption humidity (for sorbent systems), and realistic component-level efficiencies. By devising a set of unifying assumptions and consistent parameters across technologies, we provide the first fair thermodynamic comparison over a broad range of environmental conditions. Using 2nd law analysis, or least work, we study the maximum efficiency for common open system AWH methods …

Middle School Engineering Teachers’ Enactments Of Pedagogies Rooted In Funds Of Knowledge And Translanguaging, Amy Wilson-Lopez, Jorge Acosta-Feliz

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

Multilingual students should have opportunities to learn and do engineering in learning environments that foreground and sustain their cultural and linguistic practices. However, little is known about how middle school engineering teachers enact these environments. To address this gap in research and practice, this comparative case study describes the different ways in which two middle school technology and engineering teachers enacted pedagogies rooted in funds of knowledge and translanguaging. The teachers and research team engaged in a professional learning community, which focused on funds of knowledge and language-based pedagogies, for over one year. The teachers enacted pedagogies that incorporated principles …

Synthetic Aperture Radar Imaging, Srivatsan Ravichandran, Okan Ersoy

Department of Electrical and Computer Engineering Technical Reports

Simulation programs are used to locate the positions of the input target points and generate a 2D SAR image with the Range Migration Algorithm. Using the same methodology, we can create a scene geometry using the concept of Point cloud and run the simulation program to generate raw SAR data.

Estimating External Tissue Support Parameters With Fluid-Structure Interaction Models From 4d Ultrasound Of Murine Thoracic Aortae, Tanmay C. Shidhore, Hannah L. Cebull, Megan C. Madden, Ivan C. Christov, Vitaliy L. Rayz, Craig J. Goergen

Weldon School of Biomedical Engineering Faculty Publications

Modeling of fluid-structure interactions (FSIs) between the deformable arterial wall and blood flow is necessary to obtain physiologically realistic computational models of cardiovascular systems. However, lack of information on the nature of contact between the outer vessel wall and surrounding tissue presents challenges in prescribing appropriate structural boundary conditions. Imaging techniques used to visualize wall deformation in vivo may be useful for estimating simulation parameters that capture the effects of both vascular composition and surrounding tissue support on the vessel wall displacement. Here, we present a method to calibrate external tissue support parameters in FSI simulations against four-dimensional ultrasound (4DUS) …

Data Mining To Save The World, Nicole Huddleston

American Journal of Rising Scholar Activities

Data analysts look for patterns and characteristics in the large sets of data being collected under modern electronic conditions. When unusual circumstances occur, patterns within the data can alert oversight personnel to the incident before other traditional warning signs. This work utilized the standard deviation of single signal outputs for analysis. This data mining application was specifically applied to safety within the nuclear power industry.

Purdue Hog Cooling Pad Experience, Marco Baez

American Journal of Rising Scholar Activities

The demand for food is increasing with the growing population. The pork industry is currently thriving and will continue to prosper as long as sows continue to reproduce. However, the reproduction of pigs is currently facing the problem of heat stress. Environmental temperatures are reaching extremes, and lactating sows produce less milk for offspring when they are in hot weather. The main reason that they produce less is because of undernourishment. Sows eat less when hot, because when they do eat, it actually causes them to heat-up. The goal of the overall cooling pad effort is to reduce the heat …

What Governs Attitudes Toward Artifcial Intelligence Adoption And Governance?, Matthew R. O’Shaughnessy, Daniel S. Schiff, Lav R. Varshney, Christopher J. Rozell, Mark A. Davenport

Department of Political Science Faculty Publications

Designing effective and inclusive governance and public communication strategies for artificial intelligence (AI) requires understanding how stakeholders reason about its use and governance. We examine underlying factors and mechanisms that drive attitudes toward the use and governance of AI across six policy-relevant applications using structural equation modeling and surveys of both US adults (N = 3,524) and tech- nology workers enrolled in an online computer science master’s degree program (N = 425). We find that the cultural values of individualism, egalitarianism, general risk aversion, and techno-skepticism are important drivers of AI attitudes. Perceived benefit drives attitudes toward AI use but …

Human Csf Movement Influenced By Vascular Low Frequency Oscillations And Respiration, Vidhya Vijayakrishnan Nair, Brianna R. Kish, Benita Inglis, Ho-Ching Shawn Yang, Adam M. Wright, Yu-Chen Wu, Xiaopeng Zhou, Amy J. Schwichtenberg, Yunjie Tong

Purdue University Libraries Open Access Publishing Fund

Cerebrospinal fluid (CSF) movement through the pathways within the central nervous system is of high significance for maintaining normal brain health and function. Low frequency hemodynamics and respiration have been shown to drive CSF in humans independently. Here, we hypothesize that CSF movement may be driven simultaneously (and in synchrony) by both mechanisms and study their independent and coupled effects on CSF movement using novel neck fMRI scans. Caudad CSF movement at the fourth ventricle and hemodynamics of the major neck blood vessels (internal carotid arteries and internal jugular veins) was measured from 11 young, healthy volunteers using novel neck …

Necropolitics And Visuality: Remembering ‘Speculative Fictions’ In Hong Kong After Rancière And Mbembe, Anthony Siu

CLCWeb: Comparative Literature and Culture

In his article, “Necropolitics and Visuality: Remembering ‘Speculative Fictions’ in Hong Kong after Rancière and Mbembe,” Anthony Siu examines images from Defiance.Voices, a two-volume collection that gathers photography and art illustrations about the Hong Kong Protests. He studies how paintings from the second volume register politics and events, arguing that visual art can be viewed as a new form of “speculative fictions,” a material ontology that historicizes modes of sovereign violence in postcolony. The introduction situates the debate of aesthetics in Hong Kong, conjoining Rancière’s thinking on “the people” and Achille Mbembe’s philosophy on “necropolitics.” The first cluster of …

Sounding The State Of The World: Interview With Karim Rafi, Summer 2021, Matthew Brauer

CLCWeb: Comparative Literature and Culture

Matthew Brauer interviews Moroccan contemporary artist Karim Rafi about postcolonial creation in the 2020s in "Sounding the State of the World.” Beginning with Rafi’s shift to remote performances during the COVID-19 pandemic, the discussion approaches confinement as just the latest in a series of crises in North Africa and the world. The repeated experience of crisis opens a conversation about the contemporary experience of time, broached in relation to modern Moroccan art history, which emerged from and against the conservative institutions of the French Protectorate (1912-1956). The interview touches on a range of distinctive concerns in Rafi’s art practice, from …

Teacher Experiences In A Community-Based Rural Partnership: Recognizing Community Assets, Tawni Paradise, Malle R. Schilling, Jake Grohs, Jordan L. Laney

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

The purpose of this research study is to understand teacher experiences throughout their second year of engagement in the Virginia Tech Partnering with Educators and Engineers in Rural Schools partnership. This partnership is an assets-based community partnership in a rural environment between middle school teachers, regional industry, and university affiliates that is focused on implementing recurrent, hands-on, culturally relevant engineering activities for middle school students. This qualitative study uses constant comparative methodology informed by grounded theory on teacher interviews to capture both teacher experiences in the partnership as well as teacher-identified assets in their classrooms and school communities. Using the …

Origin Of The Electroarthrogram And Streaming Potentials In Compressed Cartilage, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

Background: The electroarthrogram (EAG) is a recording of electrical potentials near a joint, usually a knee, that are generated when the articular cartilage is rhythmically compressed by weight bearing. Physics-based, quantitative prediction of the magnitude of the electroarthrogram remains an open problem. Methods and Results: A new electromechanical model is created to describe viscous displacement of sodium ions from fixed sulfonate anions in the cartilage matrix by radial flow of interstitial fluid during side-to-side shifting of body weight. The viscous force exerted by fluid flow slightly displaces the Na+ ion in its potential energy well. The ion pairs form electrical …

The Impact Of Service Dogs On Objective And Perceived Sleep Quality For Veterans With Ptsd, Madhuri Vempati, Elise A. Miller, Sarah C. Leighton, Leanne O. Nieforth, Marguerite O’Haire

Discovery Undergraduate Interdisciplinary Research Internship

One in four post-9/11 veterans (Fulton et al., 2015) have been diagnosed with posttraumatic stress disorder (PTSD), facing sleep disruptions as one of their most common symptoms. Service dogs have become an increasingly popular complementary intervention and anecdotes suggest they may impact sleep for veterans with PTSD. There is a need for empirical investigation into these claims through measurement and analysis of sleep quality.

The purpose of this study was to longitudinally investigate the impact of service dogs on sleep quality through both objective and subjective measures.

Participants in the treatment group (n=92) received a service dog after baseline, while …

How To Teach Machines In Artificial Intelligence? Technical Education In John Dewey, Gilbert Simondon And Machine Learning, Olivier Del Fabbro

Education and Culture

A society that uses drills and conditioning to train its machine learning models risks creating an alienated situation between human and machine in social life, as these teaching methods generate a lack of responsibility for the actions produced by such machines. Both John Dewey and Gilbert Simondon present conceptions and ideas that shed a different light on such alienated human– machine relationships in machine learning: that is, a critique of mere drilling and training as an educational method; the mode of existence of technical objects; and the importance of experience and practicality, for example, learning by doing. After giving an …

Skill And Knowledge Sharing In Cyber-Augmented Collaborative Physical Work Systems With Hub-Ci, Praditya Ajidarma, Shimon Y. Nof

Production, Robotics, and Integration Software for Manufacturing & Management Center

No abstract provided.

Application Of Multi-Environmental Time Similarity Theory Based On Relative Information (Ri-Mets) Theory In Durability Of Concrete Structures In Marine Chloride Environment, Zhang Kai

International Conference on Durability of Concrete Structures

The Multi-environmental time similarity (METS) method is a testing method that establishes the similarity relationship between the indoor test environment and the on-site environment to evaluate the durability and predict service life of the proposed or under-constructed concrete structure. Based on the METS theory, a similarity ratio of chloride ion concentration and diffusion coefficient between the indoor accelerated environment and the on-site natural environment was established. Then the relative information entropy was introduced into the Multi-Environmental Time Similarity based on Relative Information (RI-METS) theory to consider the time variability of the diffusion coefficient and the surface chloride ion mass fraction. …

Numerical Investigation On Aggregate Settlement And Its Effect On The Durability Of Hardened Concrete, Qing-Feng Liu, Yuxin Cai

International Conference on Durability of Concrete Structures

Vibrating consolidation process is widely applied to field construction of cement concrete. However, high-frequency vibration can easily lead to the settlement of coarse aggregates (CAs) and then affects the durability of hardened concrete. This study has developed a 3-D concrete model to investigate the CA settlement caused by vibration and its effect on long-term chloride transport in concrete. Based on the proposed model, the influence mechanism of CA settlement on both chloride concentration distribution and initiation time of reinforcement corrosion is discussed in detail. The results indicate that due to the settlement, a more obvious fluctuation of chloride concentration along …

Frost Resistance And Pore Structure Properties Of Mortar Containing Air Entraining Agent Combined With Superabsorbent Polymer, Yanqun Xu, Qiang Yuan

International Conference on Durability of Concrete Structures

The air entraining effect of air entraining agent (AEA) is deeply affected by environment, which will further influence its function of improving frost resistance. To solve this problem, a strategy of using AEA combined with superabsorbent polymer(SAP) to improve the frost resistance of mortar was proposed in this study. Mass loss and relative dynamic elastic modulus of mortar were used to characterize frost resistance of mortar. Air void density, spacing factor, air void distribution and air content were measured to analyze its pore structure properties. The results verify that the combined use of AEA and SAP can improve the frost …

Carbonation Resistance Enhancement Of Cement Mortars With Recycled Plastics Using Ethylene-Vinyl Acetate And Nanosilica, Ahmed Al-Mansour, Qiang Zeng

International Conference on Durability of Concrete Structures

Carbonation resistance enhancement of cement mortars with recycled plastics using ethylene-vinyl acetate and nanosilica

Plastic has surpassed most of the man-made materials, and it has been accumulated as “waste” in the environment for several decades. Replacement of natural aggregates in concrete with recycled waste plastic (RWP) attracted great attentions in recent years due to the high potentials of recycling waste plastic. This employment of RWPs in concrete, however, was accompanied by reduction in mechanical properties and durability performances (e.g., carbonation) due to the poor interactions between RWP and cement matrix. The aim of this study is to lessen the mechanical …