Digital Commons Network^™

The Mechanism By Which Thermal Coupling Leads To An Asymptotic Maldistribution Stability Boundary For Flow Boiling In Parallel Microchannels, Md Emadur Rahman, Justin A. Weibel

CTRC Research Publications

Phase change heat transfer processes are attractive for the efficient thermal management of advanced semiconductor devices, with flow boiling in parallel microchannel heat sinks being one promising solution. However, there are several implementation challenges associated with two-phase flow in parallel microchannels, particularly flow maldistribution, which can adversely affect performance and reliability. Two-phase flow models can be useful in predicting and understanding the instability mechanisms that leads to maldistribution, such that parametric performance trends and safe regions of operation can be identified. Channel-to-channel thermal coupling has been shown to alleviate maldistribution, but it is not yet understood why this effect is …

Centerless? Making Sense Of Disruptions In The Graduate Writing Center, Shannon Mcclellan Brooks

The Writing Center Journal

This critical self-reflection is not a success story; rather, it is an effort of decolonial thinking that reckons with the idea, experience, and practice of centerlessness during pandemic-induced online transitions and operations in a graduate writing center (GWC). By tracing the contours of a series of interlocking disruptions the author and her graduate writing center community experienced during COVID-19, this article brings into sharp focus present colonial legacies inhibiting effective developments, moves, and adaptations to the GWC physical center space and praxis. Through retrospectively following pandemic-induced disruptions to her center, the author critically engages how epistemologies of coloniality and modernity …

Beyond Accommodations: Imagination, Decolonization, And The Cripping Of Writing Center Work, Karen Moroski-Rigney

The Writing Center Journal

This article examines connections among disability, colonization, university policies, and writing center work in North America. By positing that university policies have long mimicked medical and scientific processes for creating—and then discriminating against—perceived categories of disability, this article makes interventions into traditional writing center practices and pedagogies without dismissing the spirit with which these aspects of our field came to be. The article has several central claims:

• Disability has been constructed by nondisabled entities (including doctors, scientists, and institutions).
  
  
• Disability’s “drift” and myriad forms act as both specter and insidious insurance against progress or inclusive design.
  
  
• Writing center scholarship has …

Re/Searching (For) Hope: Archives And (Decolonizing) Archival Impressions, Romeo Garcia

The Writing Center Journal

On archives and archival impressions, this essay extends archival research to the elsewhere and otherwise. The essay asks, how do we reposition the contents of archives so that we can position ourselves in relation to it otherwise? It puts forward a theory of (decolonizing) archival impressions.

Photodynamic Treatment Of Staphylococcus Aureus With Non-Iron Hemin Analogs In The Presence Of Hydrogen Peroxide, Badhu Prashanthika Sivasubramaniam, Benjamin M. Washer, Yuichiro Watanabe, Kathryn E. Ragheb, J. Paul Robinson, Alexander Wei

Department of Chemistry Faculty Publications

Bacteria subjected to antiseptic or antibiotic stress often develop tolerance, a trait that can lead to permanent resistance. To determine whether photodynamic agents could be used to counter tolerance, we evaluated three non-iron hemin analogs (M-PpIX; M = Al, Ga, In) as targeted photosensitizers for antimicrobial photodynamic inactivation (aPDI) following exposure to sublethal H2O2. Al-PpIX is an active producer of ROS whereas Ga- and In-PpIX are more efficient at generating singlet oxygen. Al- and Ga-PpIX are highly potent aPDI agents against S. aureus and methicillin-resistant strains (MRSA) with antimicrobial activity (3 log reduction in colony-forming units) at nanomolar concentrations. The …

Medicinal Vibrations, Lauren E. Gardner

The Purdue Historian

In the course of the mid to late 20th and 21st centuries the term "vibrator" has been synonymous with sexual gratification and the female sex drive. However, its original usage is more in line with a therapeutic medical treatment administered and recommended by medical professionals. In this article the history of the vibrator discusses the roots of medicines views on the female body and the ways in which their ailments were treated, with medicine not fully understanding the female sexual gratification of clitoral stimulation until the 1920s. These previous decades are colored by ancient understandings of the female sex and …

The Ugliness Movement: Riot Grrrl's Use Of Ugliness As Feminist Subversion, Maylee Rollins

The Purdue Historian

In the 1990s, Riot Grrrl took the punk and feminist worlds by storm. It emphasized community and represented third-wave feminism in radical form. One particular example that represents the Riot Grrrl ideology well is ugliness. Throughout the movement, artists like Courtney Love and Kathleen Hanna used their musical platform to show the world their view of femininity. This involved body writing and reclaiming words used to degrade women, as well as dressing up in controversial outfits dubbed as “kinderwhore.” The aims of these women in using ugliness in their music were to subvert sexism in the punk scene and bring …

A Sense Of Loss: The Effect Of Prisoner Camp Conditions On German Pows’ Masculinity During The First World War, Analucia Lugo

The Purdue Historian

During the First World War, almost a million German soldiers became prisoners of war (POW) and held captive in enemy camps. The moment of capture and arrest caused these men to experience debilitating emotions, including guilt and fear. Varied conditions at POW camps bolstered these responses and often determined prisoner health and morale throughout the war. This article examines how camps in Britain, France, and Russia treated German POWs, and how German nationalism affected these soldiers' senses of masculinity and patriotism during and after the war.

Design Students’ Perspectives On Safety Concerns When Designing Future Tourism Services, Minna Virkkula, Laura Hokkanen, Jonna Häkkilä

GSTC Academic Symposium - In conjunction with the GSTC Global Conference

The safety of services is essential part of a company's social responsibility. In the tourism industry, ensuring the safety of services is crucial, but often overlooked in the design process. Incorporating safety aspects during the initial design phase can eliminate potential safety issues and improve quality of the services. By addressing safety concerns early on, unnecessary worries related to activities and services can be resolved. This paper examines the design perspective on safety in Lapland outdoor activities. Two studies were conducted with art and design students, including an online survey to identify safety concerns in various tourist scenarios, and a …

Türkiye's Sustainable Tourism Transformation: An Overview, Mustafa Sogut

GSTC Academic Symposium - In conjunction with the GSTC Global Conference

Türkiye has initiated a paradigm shift in its tourism industry, marked by a collaboration with the Global Sustainable Tourism Council (GSTC), renowned for setting robust sustainability standards. The agreement, initiated in 2022, prioritizes sustainability commitment, commencing with formulating national program criteria and certification bodies training. The initial phase is targeted for completion by the end of 2023, with subsequent stages progressively implemented by 2025, ultimately aiming to meet all international standards by 2030.

This strategic move aims to position Turkey prominently in sustainable tourism, aligning with the goals of The Paris Agreement. Turkey has proactively steered its tourism industry towards …

Green Road Project From An Environmental Justice Perspective: Stakeholders, Alternatives And Conflicts, Öykü Öztürk Karali

GSTC Academic Symposium - In conjunction with the GSTC Global Conference

The Green Road Project, viewed from an environmental justice perspective, delves into the complex interplay between tourism and the environment. Tourism heavily relies on natural resources and environmental beauty to sustain itself, yet it also inflicts significant negative impacts such as land and resource depletion, waste generation, and carbon emissions. Unfortunately, these adverse effects often go unaddressed or are deliberately disregarded in tourism policies, leading to socio-environmental conflicts globally.

This study specifically examines the socio-environmental conflict surrounding the Eastern Black Sea Green Road Project, aiming to understand the perspectives of stakeholders in the region. The Green Road Project, proposed by …

Achieving Room Temperature Plasticity In Brittle Ceramics Through Elevated Temperature Preloading, Chao Shen, Jin Li, Tongjun Niu, Jaehun Cho, Zhongxia Shang, Yifan Zhang, Anyu Shang, Bo Yang, Ke Xu, R. Edwin Garcia, Haiyan Wang, Xinghang Zhang

Purdue University Libraries Open Access Publishing Fund

Ceramic materials with high strength and chemical inertness are widely used as engineering materials. However, the brittle nature limits their applications as fracture occurs before the onset of plastic yielding. There has been limited success despite extensive efforts to enhance the deformability of ceramics. Here we report a method for enhancing the room temperature plastic deformability of ceramics by artificially introducing abundant defects into the materials via preloading at elevated temperatures. After the preloading treatment, single crystal (SC) TiO2 exhibited a substantial increase in deformability, achieving 10% strain at room temperature. SC α-Al2O3 also showed plastic deformability, 6 to 7.5% …

Reviewing The Use Of Primary Sources In The Undergraduate Business Classroom, Annette Bochenek

Libraries Faculty and Staff Scholarship and Research

This literature review explores the use of digitized primary sources as a means of enhancing affective responses to the research process through proposed business librarian-led activities in the undergraduate business classroom. The literature review discusses the implementation of primary sources in the undergraduate business classroom through suggested classroom activities founded upon the ACRL RBMS-SAA Guidelines for Primary Source Literacy, intending to inspire the use of primary sources in other areas of study. Readers will learn how to connect course material to Archival Intelligence Theory; produce a lineup of primary sources meaningful to business students; explore the impact of affect and …

Optimal Aoi For Systems With Queueing Delay In Both Forward And Backward Directions, Chih-Chun Wang

Department of Electrical and Computer Engineering Technical Reports

Age-Of-Information (AoI) is a metric that focuses directly on the application-layer objectives, and a canonical AoI minimization problem is the update-through-queues models. Existing results in this direction fall into two categories: The open-loop setting for which the sender is oblivious of the packet departure time, versus the closed-loop setting for which the decision is based on instantaneous Acknowledgment (ACK). Neither setting perfectly reflects modern networked systems, which almost always rely on feedback that experiences some delay. Motivated by this observation, this work subjects the ACK traffic to a second queue so that the closed-loop decision is made based on delayed …

Cross-Sectional Study Of Personal Protective Equipment Use, Training And Biosafety Preparedness Among Healthcare Workers During The First Months Of The Sars-Cov-2 Pandemic In Brazil, Kerstin Muner, Julia Kilgour, Tatiana Ometta, Ana Perola Drulla Brandao, Andrea Pires Dos Santos, Ana Marcia Sa Guimaraes

Purdue University Libraries Open Access Publishing Fund

Objectives Brazil has high rates of COVID-19 and tuberculosis among healthcare workers (HCWs). Personal protective equipment (PPE) is essential for their protection. We aimed to evaluate PPE use, training, and preparedness among HCWs in the early months of the SARS-CoV-2 pandemic in Brazil.

Methods A cross-sectional study was performed using questionnaires available to HCWs through a website created to provide PPE guidelines. χ2 test and robust Poisson regression identified factors associated with HCWs treating COVID-19 patients (TCOVID-19), lack of training on PPE use and N95 respirator reuse. The speech content of open-ended questions was analysed.

Results We analysed 1410 questionnaires …

Deficiencies In Safe Practices By Pilots Operating General Aviation Aircraft In Weather Conducive For Icing, Douglas Boyd Phd, Thomas Guinn Phd

Journal of Aviation Technology and Engineering

Introduction: Flights of general aviation aircraft in icing conditions pose safety hazards especially since few airplanes are equipped with ice protection systems (FIKI). Herein, we sought to answer the following questions not previously addressed: (i) Has the general aviation icing-related accident rate declined over time? (ii) Which phase(s) of flight lead(s) to the highest fraction of fatal accidents? (iii) Do general aviation pilots adhere to safe practices when operating in forecasted icing?

Methods: Retrospectively, icing-related accidents were per the National Transportation Safety Board database. Prospectively, non-FIKI single-engine airplanes, operating in forecasted icing, were tracked (January–March 2023) using FlightAwareR. Presumptive icing …

Art And Evidence In Totems Of Uganda (2014), Margaret Nagawa, Taga F. Nuwagaba

Artl@s Bulletin

In his painting and book project, Totems of Uganda: Buganda Edition (2014), Ugandan artist Taga Nuwagaba asks: What is the function of a totem? In Buganda, the historical kingdom in current-day Uganda, totems serve as unique identifiers for fifty-two distinct patrilineal descent groups designated as clans, or ebika in the Luganda language, forming the primary scheme of social and political organization. Yet, totems also serve as a conservation practice. In this 2022 interview, Nuwagaba discussed his art and the evidence he relies upon to create his images, demonstrating that identities and knowledges are complex.

Munna Uganda Taga Nuwagaba abuuza nti: …

You Cannot See It: Navigating Yorùbá Religious Artistic Materials, Stephen A. Fọlárànmí

Artl@s Bulletin

My research spanning two decades in Ọ̀yọ́ Palace generated series of questions about access to artistic materials in site-locational spaces, archives and private collections. I probe how scholars have navigated and negotiated these terrains, especially artworks created for religious functions. I explore alternatives to resolve field challenges and consider the effects of such hindrances in art historical research. Drawing on the concept of ọ̀gbẹ̀rì, anecdotes and personal scholarly experiences, I interrogate research access and propose approaches based on personal experience on the importance of Yoruba religion, and practice of initiation.

Iṣẹ́ ìwádì mi fún bíi ogún ọdún sẹ́yìn lórí ààfin …

Shaky Foundations: Cultural Classifications In Museum Collections Management Systems And The Endurance Of Colonial-Era Terminology, Carlee S. Forbes, Erica P. Jones

Artl@s Bulletin

This article uses two musical instruments with attached ancestral remains and labeled as “Asante” from the Fowler Museum at UCLA to consider effects of style-based cultural classifications that appear in museum databases today. We highlight the sway of past classifications over our current understanding of objects that is prolonged by the problem of confirmation-bias in museum collections management systems. We then indicate how working across disciplines stimulated a more nuanced understanding about the complexities of artistic styles for musical instruments with attached human remains in the Akan-speaking region of West Africa.

Cet article étudie deux instruments de musique incorporant des …

Shifting Approaches, Innovative Methods: Collection Histories As A Tool To Move Beyond William Fagg’S ‘Lower Niger Bronze Industry Mystery’, Imogen Coulson, Julie Hudson, Sam Nixon

Artl@s Bulletin

At the end of 2019, the British Museum launched a new research project focusing on copper alloy objects associated with the Lower Niger Bronze Industry. The aim was to increase knowledge of these objects through a combination of provenance and collection history research and scientific analysis. This paper will outline the earlier art historical-focused approach to the Lower Niger Bronzes corpus and will then describe the new research and its methodology. Initial findings will be presented through a case study of objects from the Forcados River in the Niger Delta region of present-day Nigeria. In doing so, we aim to …

Making Absences Present: The Process Of Visualizing Knowledge Production In Museum Records, Caitlin Glosser

Artl@s Bulletin

In this paper, I evaluate the development of data visualizations as an art historical approach. By visualizing data for Senufo-labeled objects in the Musée Africain de Lyon’s collection, I demonstrate how the museum’s knowledge infrastructure privileges European collectors over African makers. I use Tableau visualizations to decenter this narrative by making silences present in a more impactful manner than through text alone. The visualizations also reveal the complex role that one maker, Bèma Coulibaly, played in the life of the collection. The addition of the individual narrative to the data was necessary to bring a human element into view.

Nous …

Technologies Of Recovery And Discovery: The Poetics Of “Artefacts”, Kathryn Simpson

Artl@s Bulletin

This article discusses the ways that objects, specifically personal belongings, held in British collections have their stories muted to become imperial signifiers. Using two pieces of jewellery acquired in 1859 by David Livingstone, British missionary and traveller (1813-1873), a lip ring from a Mang’anja woman in present day Malawi and a bracelet from the Kafue valley in present day Zambia, this article evidences how digital tools can be used to layer, in a palimpsestic way, the information available about colonially collected objects, to locate them physically, in the space they inhabit, and narratively, in the space they create.

En este …

Animal-Assisted Services And Occupational Therapy Within An Australian Context: A Survey Study, Jessica Hill, Carlie Driscoll, Kelly Pearse

People and Animals: The International Journal of Research and Practice

Introduction: The incorporation of animal-assisted services is an emerging field of occupational therapy. There remains varying levels of involvement and knowledge of what is involved in animal-assisted services among Australian occupational therapists. The profession of occupational therapy acknowledges that competence as a clinician requires appropriate education and knowledge guiding clinical decision making.

Research Question: This study aimed to explore the understanding and role of Australian occupational therapists including animal-assisted services in their practice, as well as the changes required to support future service delivery.

Methods: A cross sectional survey was conducted online. Participants were recruited through a digital mailing list, …

A Gnotobiotic Mouse Model With Divergent Equol-Producing Phenotypes: Potential For Determining Microbial-Driven Health Impacts Of Soy Isoflavone Daidzein, Lindsay M. Leonard, Abigayle M.R. Simpson, Shiyu Li, Lavanya Reddivari, Tzu-Wen L. Cross

Purdue University Libraries Open Access Publishing Fund

The implications of soy consumption on human health have been a subject of debate, largely due to the mixed evidence regarding its benefits and potential risks. The variability in responses to soy has been partly attributed to differences in the metabolism of soy isoflavones, compounds with structural similarities to estrogen. Approximately one-third of humans possess gut bacteria capable of converting soy isoflavone daidzein into equol, a metabolite produced exclusively by gut microbiota with significant estrogenic potency. In contrast, lab-raised rodents are efficient equol producers, except for those raised germ-free. This discrepancy raises concerns about the applicability of traditional rodent models …

Self-Consistent Atmosphere Representation And Interaction In Photon Monte Carlo Simulations, J. R. Peterson, G. Sembroski, A. Dutta, C. Remocaldo

Purdue University Libraries Open Access Publishing Fund

We present a self-consistent representation of the atmosphere and implement the interactions of light with the atmosphere using a photon Monte Carlo approach. We compile global climate distributions based on historical data, self-consistent vertical profiles of thermodynamic quantities, spatial models of cloud variation and cover, and global distributions of four kinds of aerosols. We then implement refraction, Rayleigh scattering, molecular interactions, and Tyndall–Mie scattering to all photons emitted from astronomical sources and various background components using physics first principles. This results in emergent image properties that include: differential astrometry and elliptical point spread functions (PSFs) predicted completely to the horizon, …

Information Literacy In The Age Of Ai: A Conversation, Karen Kaufmann, Clarence Maybee

Libraries Faculty and Staff Scholarship and Research

Presented at the Georgia International Conference on Information Literacy April 19, 2024, this presentation discusses information literacy as a discipline in the age of AI, as well as teaching and research considerations for this new lens on information literacy.

The Discipline Of Information Literacy: A Conversation, Clarence Maybee, Karen Kaufmann

Libraries Faculty and Staff Scholarship and Research

Presented at LEAF, 2024. Introduces information literacy as a discipline and implications for teaching information literacy.

Small Modular Reactor And Advanced Reactor Feasibility Study Interim Report, Purdue University Administrative Operations, Purdue University School Of Nuclear Engineering, Duke Energy

Administrative Operations Reports

No abstract provided.

Nature Meets Civilization: The Arcadian Myth In Harold Bell Wright’S Ozarks Novels, John J. Han

KAUPA Letters

In Back to Nature (1969), Peter J. Schmitt explores the back-to-nature movement led by middle-class urbanites from the turn of the twentieth century to shortly after World War I. While the leaders of the movement viewed nature as a healer and restorer for humanity, they embraced a romanticized notion of it—one removed from the harsh realities of country living. The pastoral impulse also gave rise to what Schmitt terms wilderness fiction by authors such as Gene Stratton Porter, Dallas Sharp, and Harold Bell Wright. This paper analyzes Wright’s The Shepherd of the Hills (1907), The Re-Creation of Brian Kent (1919), …

Two Imagined Chinas In Tel Quel, Wang Yichen

CLCWeb: Comparative Literature and Culture

From the mid-1960s, the literary review Tel Quel shifted its anti-traditional and avant-garde stance in arts and literature toward politics within the radical political context in France. Its editor Philippe Sollers initiated a “political turn,” marked by its transformation from its “structuralist period” to its “China period.” Its “China period” inadvertently created a “textual spectacle” of two imagined Chinas: first, a poetic, static “ancient China” represented by Daoism (Taoism), Chinese ideograms, and classical Chinese art and poetry; and second, a revolutionary, subversive “modern China” represented by Maoism along with Lu Xun and other left-wing writers. Taking appropriation, rather than misreading, …