Digital Commons Network^™

Evaluation Of Bell Pepper Cultivars With And Without Resistance To Bacterial Leaf Spot And Phytophthora, West Central Minnesota, Nathan Dalman, Steve Poppe

Midwest Vegetable Trial Reports

Bacterial leaf spot (BLS) and Phytophthora (PHY) diseases are a common problem for Minnesota bell pepper producers and if not detected and treated early enough, these diseases can kill the plants. There are cultivars that have resistance to these particular diseases but these cultivars must maintain yields similar to traditional cultivars in order to be desired by producers and buyers. Our goal was to determine any differences in performance between cultivars with and without resistance. Yield, fruit size and number of fruit per plant were the evaluated characteristics.

Animal-Assisted Interventions: Relationship Between Standards And Qualifications, Greta Kerulo, Niko Kargas, Daniel S. Mills, Graham Law, Rise Vanfleet, Tracie Faa-Thompson, Melissa Y. Winkle

People and Animals: The International Journal of Research and Practice

Ethical practice of animal- assisted interventions (AAI) requires appropriate qualifications and experience for all parties involved. Recently introduced and updated Standards of Practice emphasize the importance of AAI- specific training and qualification for different types of AAI, which should only be delivered within the scope of one’s professional competence. The purpose of this study was (1) to explore how a self- selected group of practitioners delivering AAI describe their work in relation to recent attempts to develop a terminological consensus (IAHAIO, 2014, 2018), and (2) to describe how AAI best practice recommendations (AAII, 2018) are implemented into professional practice among …

Photocatalytic Inactivation Efficacy Of Sars-Cov-2 In Hvac Systems, Andrew J. Freeman, Sudharshan Anandan, Ernest R. Blatchley Iii, W. Travis Horton, David M. Warsinger

Discovery Undergraduate Interdisciplinary Research Internship

The coronavirus pandemic has emphasized a need for robust and reliable air purification systems in buildings; with that comes a need for a standardized testing methodology for air purification technologies in HVAC air circulation systems. One such method of air purification is photocatalytic oxidation (PCO), a mechanism in which a catalyst irradiated by light produces reactive molecules that degrade a wide range of pollutants, including the aerosols that carry COVID. This technology has primarily been used in aqueous applications, but there have recently been developments in air purification that have made it a promising contender to existing technologies. One of …

Bilingual Practices In A Transnational Writing Center: A Foundational Perspective From Russia, Olga Aksakalova

The Writing Center Journal

No abstract provided.

Review: How We Teach Writing Tutors, Nathalie Singh-Corcoran

The Writing Center Journal

No abstract provided.

2021 Standard-Size Triploid Watermelon Variety Evaluation In Indiana, Wenjing Guan, Dan Egel, Dennis Nowaskie, Dean Haseman

Midwest Vegetable Trial Reports

A total of 6,700 acres of watermelons were planted in Indiana in 2020 with a production value of $46.9 million (USDA 2021). Production in Indiana in 2020 was increased from 6,500 acres and $35.3 million production value in 2019. Primary watermelon type grown in Indiana is standard-sized triploid watermelons. Variety selection based on yield, disease resistance and fruit quality is a key decision in watermelon production. The objective of this study is to provide watermelon producers and seed companies with the updated information on the performance of watermelon varieties grown in Indiana.

Public Acceptance Of Indot’S Traffic Engineering Treatments And Services, Sarah E. Adsit, Theodora Konstantinou, Konstantina Gkritza, Jon D. Fricker

JTRP Technical Reports

As a public agency, interacting with and understanding the public’s perspective regarding agency activities is an important endeavor for the Indiana Department of Transportation (INDOT). Although INDOT conducts a biennial customer satisfaction survey, it is occasionally necessary to capture public perception regarding more specific aspects of INDOT’s activities. In particular, INDOT needs an effective way to measure and track public opinions and awareness or understanding of a select set of its traffic engineering practices. To evaluate public acceptance of specific INDOT traffic engineering activities, a survey consisting of 1,000 adults residing within the State of Indiana was conducted. The survey …

Alternate Interchange Signing Study For Indiana Highways, Stanley Chien, Yaobin Chen, Renran Tian, Lingxi Li, Donglin Liu, Jue Zhou, Dan Shen

JTRP Technical Reports

The main objectives of this research were to (1) understand signing issues from the perspective of drivers and (2) develop recommendations for improving interchange signing in Indiana to aid driver understanding and increase the safety and efficiency of highway traffic operations. An online survey with specific questions was designed and distributed through email, social media, online newspapers, and a survey company with the goal of better understanding driver thinking when approaching decision-making areas on the interstate. The analysis of the survey results revealed the following.

• Drivers usually do not know the interchange types as they approach an interchange on the …

Life Cycle Integration Of Building Information Modeling In Infrastructure Projects, Xingzhou Guo, Chi Tian, Jinwu Xiao, Yunfeng Chen, Jiansong Zhang

JTRP Technical Reports

Building Information Modeling (BIM) can provide solutions to many challenges of asset management, such as missing data, incompatible software, and an unclear business process. However, current implementation of BIM in infrastructure projects has only considered limited factors, such as technology application and digital information delivery, while issues of system compatibility and information needs are still missing. Different aspects of a business are interdependent and an incompatible development of various factors might result in different levels of BIM implementation or even project failure. Comprehensive research is needed to explore the key factors and challenges of BIM implementation in infrastructure projects. This …

Develop And Deploy A Safe Truck Platoon Testing Protocol For The Purdue Arpa-E Project In Indiana, Greg Shaver, Miles Droege

JTRP Technical Reports

Hilly terrain poses challenges to truck platoons using fixed set speed cruise control. Driving the front truck efficiently on hilly terrain improves both trucks fuel economies and improves gap maintenance between the trucks. An experimentally-validated simulation model was used to show fuel savings for the platoon of 12.3% when the front truck uses long horizon predictive cruise control (LH-PCC), 8.7% when the front truck uses flexible set speed cruise control, and only 1.2% when the front truck uses fixed set speed cruise control. Purdue, Peloton, and Cummins have jointly configured two Peterbilt 579 trucks for relevant combinations of: (1) coordinated …

Synthesis Study Of Best Practices For Mapping And Coordinating Detours For Maintenance Of Traffic (Mot) And Risk Assessment For Duration Of Traffic Control Activities, Isaiah C. Mwamba, Mohamadali Morshedi, Suyash Padhye, Amir Davatgari, Soojin Yoon, Samuel Labi, Makarand Hastak

JTRP Technical Reports

Maintenance of traffic (MOT) during construction periods is critical to the success of project delivery and the overall mission of transportation agencies. MOT plans may include full road closures and coordination of detours near construction areas. Various state DOTs have designed their own manuals for detour mapping and coordination. However, very limited information is provided to select optimal detour routes. Moreover, closures or detours should provide not only measurable consequences, such as vehicle operating costs and added travel time, but also various unforeseen qualitative impacts, such as business impacts and inconvenience to local communities. Since the qualitative aspects are not …

Detection And Classification Of Concrete Patches By Integrating Gpr And Surface Imaging, Peng Cheng, James V. Krogmeier, Mark R. Bell, Kelvin Wang, Joshua Li, Guangwei Yang

JTRP Technical Reports

This research considers the detection, location, and classification of patches in concrete and asphalt-on-concrete pavements using data taken from ground penetrating radar (GPR) and the WayLink 3D Imaging System. In particular, the project seeks to develop a patching table for “inverted-T” patches. A number of deep neural net methods were investigated for patch detection from 3D elevation and image observation, but the success was inconclusive, partly because of a dearth of training data. Later, a method based on thresholding IRI values computed on a 12-foot window was used to localize pavement distress, particularly as seen by patch settling. This method …

Facilitating Preservice Elementary Science Teachers’ Shift From Learner To Teacher Of Engineering Design-Based Science Teaching, Brenda Capobianco, Jeffrey Radloff, Jenna Clingerman

Purdue Center for Early Learning Faculty and Staff Publications

The role of engineering in science and mathematics education continues to emerge as a contributing factor to improving STEM education. Efforts across different countries include the integration of engineering in K-12 curriculum, after school programs, and inservice teacher professional development. Only recently have science teacher educators begun to introduce engineering in science teacher preparation programs. By incorporating novel curriculum and design-related experiences, we can begin to explore how preservice teachers not only learn about engineering, but more importantly, learn how to teach science using engineering design. In this study, we explore different ways 45 elementary preservice science teachers characterize and …

Working With Multilingual Student Writers, Purdue Writing Lab

Purdue Writing Lab/Purdue OWL Creative Materials

Reading and assessing the writing of multilingual students can be a unique challenge for college faculty. This guide offers strategies for how to read, assess, and provide feedback on the work of multilingual student writers, and it contextualizes these strategies in current Second Language Studies research. Sections of the guide address contexts of multilingual writing, common concerns about multilingual writers, and methods for supporting writers and for addressing errors.

Working With Graduate Student Writers, Purdue Writing Lab

Purdue Writing Lab/Purdue OWL Creative Materials

The purpose of this guide is to aid faculty across the university in supporting graduate students as writers. The guide offers information on the context of graduate student writing and on the development of graduate students as scholarly writers, addresses some common concerns about graduate student writing, and shares methods and activities for supporting writing development at the graduate level.

Mgmt 110 Introduction To Management And Information Strategies Fall 2021 Syllabus, Heather A. Howard, Zoeanna A. Mayhook, Annette Bochenek

Libraries Faculty and Staff Supplemental Materials

Syllabus for MGMT 110: Introduction to Management and Information Strategies offered Fall 2021.

Ultra-White Baso4 Paint And Film With Remarkable Radiative Cooling Performance, X. Li, J. Peoples, P. Y. Yao, X. Ruan

CTRC Research Publications

Radiative cooling is a passive cooling technology that offers great promises to reduce space cooling cost, combat the urban island effect, and alleviate the global warming. To achieve passive daytime radiative cooling, current state-of-the-art solutions often utilize complicated multilayer structures or a reflective metal layer, limiting their applications in many fields. Attempts have been made to achieve passive daytime radiative cooling with single-layer paints, but they often require a thick coating or show partial daytime cooling. In this work, we experimentally demonstrate remarkable full-daytime subambient cooling performance with both BaSO4 nanoparticle films and BaSO4 nanocomposite paints. BaSO4 has a high …

Common-Mode Capacitance Of Bus-Bar-Based Common-Mode Inductors, Harshita Singh, Scott D. Sudhoff, Robert R. Swanson

Department of Electrical and Computer Engineering Faculty Publications

Prediction of the common-mode self-capacitance of common-mode inductors is essential to their design in order to ensure effective operation over the frequency range of interest. This paper presents a model for the calculation of common-mode capacitance of a bus-bar-based common-mode inductor. An equivalent circuit of the inductor that accounts for high-frequency effects such as eddy currents in nanocrystalline cores is also set forth. The predicted and measured capacitances are compared for three such inductors.

Topology Optimization Of Microchannel Heat Sinks Using A Homogenization Approach, S. Ozguc, L. Pan, J. A. Weibel

CTRC Research Publications

Topology optimization for heat sink devices typically relies on penalization methods to ensure the fi- nal designs are composed of strictly solid or open regions. In this work, we formulate a homogenization approach wherein the partial densities are physically represented as porous microstructures. This formu- lation allows design of thermal management components that have sub-grid features and leverages ad- ditive manufacturing techniques that can produce such partially porous regions within the build volume. Topology optimization of a liquid-cooled microchannel heat sink is presented for a hotspot over a uniform background heat input. The partial densities are represented as arrays of …

A Semi-Empirical Model For Thermal Resistance And Dryout During Boiling In Thin Porous Evaporators Fed By Capillary Action, S. Sudhakar, J.A. Weibel, S.V. Garimella

CTRC Research Publications

Two-phase passive heat transport devices such as vapor chambers, loop heat pipes, and capillary pumped loops utilize porous evaporators for phase change and to drive fluid transport. Nucleate boiling can occur within such capillary-fed porous evaporators, especially under high-heat-flux operation, as has been visually observed in various experimental studies in the literature. However, prior modeling efforts have typically only considered single-phase flow of liquid through a completely saturated porous medium for characterizing the dryout limit and thermal performance. The present work offers a new semi-empirical model for prediction of thermal resistance and dryout during boiling in capillary-fed evaporators. Thermal conduction …

Effective Anisotropic Properties-Based Representation Of Vapor Chambers, K. Baraya, J. A. Weibel, S V. Garimella

CTRC Research Publications

An easy-to-use representation of vapor chambers is developed in terms of effective anisotropic properties. This approach enables accurate simulation of the vapor chamber represented as a solid conduction block by assigning appropriate values to its effective density, specific heat, in-plane thermal conductivity, and through-plane thermal conductance. These effective properties are formulated such that the vapor chamber operation in terms of steady-state and transient thermal responses matches a full, physical simulation of phase change and energy transport in the vapor core; they are intrinsic properties that can be applied independently of the boundary conditions and heat input.

Asymmetric Solidification During Droplet Freezing In The Presence Of A Neighboring Droplet, J. E. Castillo, Y. Huang, Z. Pan, J. A. Weibel

CTRC Research Publications

A supercooled liquid droplet that freezes on a cold substrate interacts with the local surroundings through heat and mass exchange. Heat loss occurs to the substrate via conduction and at the droplet interface via evaporative cooling, diffusion, and convection. In a group of many droplets, these interac- tions are believed to be responsible for inter-droplet frost propagation and the evaporation of supercooled neighboring droplets. Furthermore, interactions between a standalone freezing droplet and its surround- ings can lead to the formation of condensation halos and asymmetric solidification induced by exter- nal flows. This paper investigates droplet-to-droplet interactions via heat and mass …

Quantifying The Pathways Of Latent Heat Dissipation During Droplet Freezing On Cooled Substrates, J. E. Castillo, Y. Huang, Z. Pan, J. A. Weibel

CTRC Research Publications

When a liquid droplet freezes on a cooled substrate, the portion of latent heat released by ice formation that is not immediately absorbed by the supercooled liquid droplet is transferred to the solid substrate below the droplet and the surrounding air. It is important to quantify heat dissipation through these two pathways because they govern the propagation of frost between multiple droplets. In this paper, infrared (IR) thermography measurements of the surface of a freezing droplet are used to quantify the fraction of latent heat released to the substrate and the ambient air. These IR measurements also show that the …

Research And Scholarly Methods: Semi-Structured Interviews, Omolola A. Adeoye-Olatunde, Nicole Olenik

Department of Pharmacy Practice Faculty Publications

The popularity and value of qualitative research has increasingly been recognized in health and pharmacy services research. Although there is certainly an appropriate place in qualitative research for other data collection methods, a primary benefit of the semi-structured interview is that it permits interviews to be focused while still giving the investigator the autonomy to explore pertinent ideas that may come up in the course of the interview, which can further enhance understanding of the pharmacy service being assessed. The purpose of this narrative review is to summarize methodological considerations and procedures for conducting semi-structured interviews in pharmacy services research. …

Integrating Online Discussions Into Engineering Curriculum To Endorse Interdisciplinary Viewpoints, Promote Authentic Learning, And Improve Information Literacy, Lisa Bosman, Kurt Paterson, Margaret Phillips

Libraries Faculty and Staff Scholarship and Research

Engineering is very much an applied discipline where math and science concepts, skills, and tools can be used to design products or processes with new and/or increased value. Research suggests active learning is an effective method for teaching and learning in the engineering classroom. Moreover, students continue to express increased satisfaction when taught using this experiential pedagogical approach. One approach to active learning gaining traction in the engineering classroom is the use of online discussions. The purpose of this paper is to offer a structured approach for engineering educators to develop online discussion prompts aimed to prepare engineering students for …

Integrating The Entrepreneurial Mindset Into The Engineering Classroom, Lisa Bosman, Margaret Phillips

Libraries Faculty and Staff Scholarship and Research

CONTRIBUTION: This paper highlights one approach to fostering the entrepreneurial mindset in the engineering classroom. BACKGROUND: Entrepreneurship and innovation are currently trending topics in engineering education and will continue developing for the foreseeable future. INTENDED OUTCOMES: The guiding research question is: How can an entrepreneurial mindset focused learning experience improve student self-regulation, seeing value, and lifelong learning through metacognitive reflections? APPLICATION DESIGN: The study is implemented within a five-week module focused on developing the entrepreneurial mindset as part of a required course on supply chain management technology. The supporting pedagogical interventions include authentic learning, information literacy, a mix of low …

Efficient Electrocatalysis For Denitrification By Using Tio2 Nanotube Arrays Cathode And Adding Chloride Ions, Yangyuan Ji, Junfeng Niu, Dong Xu, Kaixuan Wang, Jacob Brejcha, Seunghyo Jeon, David M. Warsinger

School of Mechanical Engineering Faculty Publications

Electrocatalysis is emerging as a promising alternative to bacterial denitrification for removing nitrate and ammonia from sewage. The technology is highly efficient and robust in actual wastewater treatment scenarios; however, there may be the generation of harmful intermediates (such as nitrite) on the traditional cathode material. In this study, we demonstrated that TiO2 nanotube arrays can be used as an effective cathode to reduce nitrate to ammonia without generation of nitrite. Alongside this, the addition of chloride ions in the solution can further oxidize ammonia to N2. We looked into the key factors influencing the electrocatalytic denitrification, including the current …

2021 Personal-Size Triploid Watermelon Variety Evaluation In Indiana, Wenjing Guan, Dan Egel, Dennis Nowaskie, Dean Haseman

Midwest Vegetable Trial Reports

Personal-size triploid watermelons are usually defined as weighing 4.4 to 8.8 lbs (Vinson et al., 2010). The ideal size is about 6-7 lbs. They open have firm flesh and high lycopene content and attract certain consumers. This variety trial included 12 personal-size triploid watermelons. Yield and fruit quality parameters were evaluated.

Use Of Free And Open-Source Software Apps Provide Many Benefits For College Students, Jeffrey A. Nowak

Indiana STEM Education Conference

Free and Open-Source software apps along with free Linux-based distributions of operating systems have developed at a blistering pace over the past decade. Today more than ever before, it is possible for students to download and use free software to complete a plethora of complex tasks related to educational pursuits. This paper considers the impact of allowing students to explore the use of more than a dozen cross-platform, free, and open-source software apps to complete STEM-related tasks in a University preservice education course. The core cross-platform apps install in Windows 10, macOS, and various Linux distributed operating systems. In addition, …

Environmental Injustice, A City In Crisis: The Use Of Informal Science, Crystal Nettles, Jomo Mutegi

Indiana STEM Education Conference

In April of 2014, the city of Flint, Michigan gained national attention and assistance after the residents noticed physical issues in their water. This unfortunate event led to opportunities to address certain issues in research and provided a window of opportunity to learn. This work will allow us to analyze how individuals use science as a resource for decision making, conscious thinking, and understanding of informal science knowledge.