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An Energy-Water Corridor Along The Us/Mexico Border: Changing The 'Conversation', Luciano Castillo, William K. George, Jay P. Gore, Ronald Adrian, Humberto Bocanegra Evans, Walter Gutierrez, Carlos Fm Coimbra, Martin Wosnik, David M. Warsinger, Carlos Castillo-Chavez, Leonardo P. Chamorro, Rebecca J. Barthelmie, Sara C. Pryor, John O. Dabiri, Beverly Mckeon, Kenneth T. Christensen, Fazzle Hussain, Harindra J. Fernando, Elaine Oran, James J. Riley, Richard Tapia Jan 2021

An Energy-Water Corridor Along The Us/Mexico Border: Changing The 'Conversation', Luciano Castillo, William K. George, Jay P. Gore, Ronald Adrian, Humberto Bocanegra Evans, Walter Gutierrez, Carlos Fm Coimbra, Martin Wosnik, David M. Warsinger, Carlos Castillo-Chavez, Leonardo P. Chamorro, Rebecca J. Barthelmie, Sara C. Pryor, John O. Dabiri, Beverly Mckeon, Kenneth T. Christensen, Fazzle Hussain, Harindra J. Fernando, Elaine Oran, James J. Riley, Richard Tapia

School of Mechanical Engineering Working Papers

Over the last decade, migration has become a divisive issue around the world. A large number of countries have erected barriers along their borders to prevent migration, leading to geopolitical tension. Climate change effects will likely exacerbate migration tensions, which will require bold and creative solutions to this difficult social predicament. Here we detail a plan to construct an energy-water corridor along a border that has been the focus of much attention recently: The U.S.-Mexico border. Our proposed solution helps to alleviate some of the negative effects of climate change, while providing energy and economic stimulus to an area that …

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Osmocean, Katie Brodersen, Alec Lanter, Maulee Sheth, Nathaniel Kiefer, Emily Bywater, Kumansh Furia, Brittany Cafferty, Hayden Schennum, Yi Xie, Abigail Werner, Deepika Ramchandani, Sandra Cordoba, Akshay Rao, Jun Chen, Abhimanyu Das, David M. Warsinger Jan 2021

Osmocean, Katie Brodersen, Alec Lanter, Maulee Sheth, Nathaniel Kiefer, Emily Bywater, Kumansh Furia, Brittany Cafferty, Hayden Schennum, Yi Xie, Abigail Werner, Deepika Ramchandani, Sandra Cordoba, Akshay Rao, Jun Chen, Abhimanyu Das, David M. Warsinger

School of Mechanical Engineering Working Papers

The objective of this Build & Test was to prove that the Osmocean wave-powered batch reverse osmosis (BRO) system is physically realizable. Through a comprehensive and systematic engineering process, the optimal components for the WEC-side Osmocean coupling were procured, assembled, and tested. The results indicate that a control effort developed for the main loop throttle valve successfully tracks input signals meant to simulate interaction with the BRO system to within 6% error. Future work will include developing a controller for the kidney loop throttle valve to assist in keeping the main loop flow rate constant as well as the direct …

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How Engineering Technology Students Perceive Mathematics, Meher R. Taleyarkhan, Anne M. Lucietto, Therese M. Azevedo Jan 2021

How Engineering Technology Students Perceive Mathematics, Meher R. Taleyarkhan, Anne M. Lucietto, Therese M. Azevedo

School of Engineering Technology Faculty Publications

Engineering Technology (ET) is often combined with that of Engineering. Although Engineering Technology is based on a more hands-on approach and Engineering a theoretical approach, the two majors share a very similar pedagogy in teaching students the same engineering and scientific principles. An observation by an ET professor found that ET students more often than not would eschew the use of mathematical computations and instead provide answers they believe to be correct, without computation or explanation. Leading researchers to delve into possible reasons as to why ET students are reluctant to utilize mathematics. This study utilized in-person interviews with 15 …

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Integrating Online Discussions Into Engineering Curriculum To Endorse Interdisciplinary Viewpoints, Promote Authentic Learning, And Improve Information Literacy, Lisa Bosman, Kurt Paterson, Margaret Phillips Jan 2021

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 …

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Comparative Study Of Exergetic And Economic Analysis Of Multi-Evaporator Nh3 And Nh3-Co2 Crs For A Seafood Processing Plant, Santosh Kumar Saini, M.S Dasgupta, Kristina N. Widdel, Souvik Bhattacharyya Jan 2021

Comparative Study Of Exergetic And Economic Analysis Of Multi-Evaporator Nh3 And Nh3-Co2 Crs For A Seafood Processing Plant, Santosh Kumar Saini, M.S Dasgupta, Kristina N. Widdel, Souvik Bhattacharyya

International Refrigeration and Air Conditioning Conference

In a seafood processing plant, refrigeration is a vital and energy intensive process. In India, NH3 is predominately used to cater to such refrigeration demands. These industrial refrigeration systems have the multi-evaporator configuration with high pressure ratios necessitating adoption of multistage compression. In recent years, owing to excellent and favorable thermo-physical properties of CO2 in low temperature, adoption of NH3-CO2 cascade refrigeration system (CRS) with NH3 in high temperature cycle is gaining worldwide acceptance. In the present work, performance of a conventional NH3 multistage industrial refrigeration system is compared with a proposed NH3-CO2 CRS system in terms of energy, exergy …

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Investigation Of Two-Phase Refrigerant Behavior Upon Cycle Startup For Compressor Protection In Microgravity Applications, Paige E. Beck, Leon P. M. Brendel, James E. Braun, Eckhard A. Groll Jan 2021

Investigation Of Two-Phase Refrigerant Behavior Upon Cycle Startup For Compressor Protection In Microgravity Applications, Paige E. Beck, Leon P. M. Brendel, James E. Braun, Eckhard A. Groll

International Refrigeration and Air Conditioning Conference

Vapor compression cycles (VCCs) are a promising technology for refrigeration needs on future space craft due to their generally high cooling COP. However, due to microgravity there lies a risk of liquid flooding the compressor during start-up. Thus, to better prepare VCCs for microgravity applications, it is significant to understand the dependence of two-phase refrigerant on gravity during start-up. In this work, liquid flooding is evaluated at the start-up of a VCC and a possibility for passive compressor protection is considered. The experimental setup has two configurations. In the first, two-phase phenomena can be observed in a transparent tube and …

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Preface And Acknowledgments, William S. Walker Iii, Lynn A. Bryan, Siddika Selcen Guzey, Elizabeth Suazo-Flores Jan 2021

Preface And Acknowledgments, William S. Walker Iii, Lynn A. Bryan, Siddika Selcen Guzey, Elizabeth Suazo-Flores

Indiana STEM Education Conference

No abstract provided.

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Thinking With Algebra: A Project And Perspective, David Feikes, Bir Kafle, Natalie Mcgathey, William S. Walker Iii Jan 2021

Thinking With Algebra: A Project And Perspective, David Feikes, Bir Kafle, Natalie Mcgathey, William S. Walker Iii

Indiana STEM Education Conference

Thinking with Algebra (TWA) is a project to develop algebra curriculum for college classes. The overall goal is to develop curricular materials that will help prepare students conceptually for college algebra. The project is described and the importance of algebraic structure as a theoretical consideration is explained.

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Contents, William S. Walker Iii, Lynn A. Bryan, Siddika Selcen Guzey, Elizabeth Suazo-Flores Jan 2021

Contents, William S. Walker Iii, Lynn A. Bryan, Siddika Selcen Guzey, Elizabeth Suazo-Flores

Indiana STEM Education Conference

No abstract provided.

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Creating Awareness Of The Turkey Industry Through Stem-Based Online Curriculum, Elizabeth Simmermeyer, Elizabeth Karcher Jan 2021

Creating Awareness Of The Turkey Industry Through Stem-Based Online Curriculum, Elizabeth Simmermeyer, Elizabeth Karcher

Indiana STEM Education Conference

As the food industry has evolved over the years, consumers have more accessible and convenient outlets to buy groceries, dine in, or carry out. While there are many advantages to this ever-changing industry, a large gap exists in the understanding of food production from farm to fork. Consumer perceptions are influenced beginning at an early age. Education is the solution to bridge this gap between farm to fork; however, there are limited STEM-based agricultural resources available for teachers to implement in their classrooms. Creating these agricultural resources provides teachers the opportunity to share the story of the agricultural industry with …

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Raising The Bar During Early Immunotherapy For Cancer: Simple Mathematical Models May Help Distinguish Temporary Vs. Ultimate Progression, Charles F. Babbs Jan 2021

Raising The Bar During Early Immunotherapy For Cancer: Simple Mathematical Models May Help Distinguish Temporary Vs. Ultimate Progression, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

Background: The apparent success of immunotherapy depends on the duration of follow up, sometimes with little evidence of efficacy during the first 4 to 8 months and often some degree of “pseudoprogression”. Differentiating transient pseudoprogression from true progression that would require a change in therapy can be challenging. The present study uses mathematical modeling and simulation to account for the unique kinetics and delayed clinical effects of immunotherapy and suggests improved approaches to predict efficacy and patient response from imaging studies. Methods: A mathematical model of tumor cell-immunocyte interaction is exercised to simulate a large number of individual patients and …

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A Framework For Blue Energy Enabled Energy Storage In Reverse Osmosis Processes, Akshay Rao, Owen R. Li, Stephen M. Coan, George Elias, Sandra Cordoba, Michael Roggenberg, Luciano Castillo, David M. Warsinger Jan 2021

A Framework For Blue Energy Enabled Energy Storage In Reverse Osmosis Processes, Akshay Rao, Owen R. Li, Stephen M. Coan, George Elias, Sandra Cordoba, Michael Roggenberg, Luciano Castillo, David M. Warsinger

School of Mechanical Engineering Faculty Publications

Reverse osmosis (RO) is perhaps the most promising desalination technology, but it is facing growing economic challenges when coupled to an intermittent energy supply, such as renewable energy-based grids. A technology with similar components to reverse osmosis is pressure retarded osmosis (PRO), which produces energy from differences in salt concentration (blue energy). However, with the increasing cost-competitiveness of wind and solar photovoltaic renewable energy, PRO faces severe technoeconomic challenges as a stand-alone energy technology. To address cost and energy challenges of both RO and PRO, we propose a framework to intermittently operate RO with an instantaneous, electricity-producing PRO mode by …

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Direct-Drive Ocean Wave-Powered Batch Reverse Osmosis, Katie M. Brodersen, Emily A. Bywater, Alec M. Lanter, Hayden H. Schennum, Kumansh N. Furia, Maulee K. Sheth, Nathaniel S. Kiefer, Brittany K. Cafferty, Akshay Rao, Jose M. Garcia, David M. Warsinger Jan 2021

Direct-Drive Ocean Wave-Powered Batch Reverse Osmosis, Katie M. Brodersen, Emily A. Bywater, Alec M. Lanter, Hayden H. Schennum, Kumansh N. Furia, Maulee K. Sheth, Nathaniel S. Kiefer, Brittany K. Cafferty, Akshay Rao, Jose M. Garcia, David M. Warsinger

School of Mechanical Engineering Faculty Publications

Ocean waves provide a clean, reliable source of energy making them a viable energy source for desalination, especially in coastal communities and island nations. However, large capital costs render current wave-powered desalination technologies economically infeasible. This work presents a configuration for ocean-wave-energy-powered batch reverse osmosis. The proposed system uses seawater as the working fluid in a hydro-mechanical coupling and replaces the reverse osmosis high-pressure pump with a hydraulic converter for direct-drive, allowing for minimal intermediary power conversions, which leads to fewer parts necessary for operation and higher efficiencies. The concept was analyzed with MATLAB and Simulink to model the transient …

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Games In Environmental Sustainability Education, Shamila Janakiraman Jan 2021

Games In Environmental Sustainability Education, Shamila Janakiraman

Indiana STEM Education Conference

Sustainability education must not stop with creating awareness, it should promote mindfulness, be persuasive, and also adapt to the needs of young learners (Janakiraman et al., 2018). Knowledge, when provided as an activity and experience that is situated in scenarios, will help learners develop situated understandings (Gee, 2008). In environmental sustainability education (ESE), digital games can serve as effective pedagogical tools because they can encourage exploration and experimentation when teachers and parents use them purposefully. This brief examines the following questions: (a) Were there any differences in the environmental attitudes between students who played a game and students who did …

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Use Of Free And Open-Source Software Apps Provide Many Benefits For College Students, Jeffrey A. Nowak Jan 2021

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, …

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Gems Research Projects, Elizabeth Suazo-Flores, Lili Zhou, Sue Ellen Richardson Jan 2021

Gems Research Projects, Elizabeth Suazo-Flores, Lili Zhou, Sue Ellen Richardson

Indiana STEM Education Conference

Informal learning spaces offer leaders and learners opportunities to develop their STEM identities and practices (e.g., Shokeen et al., 2020; Simpson et al., 2017). GEMS (Girls Excelling in Math and Science) is an after-school program where girls have had opportunities to be themselves while engaging with STEM activities. We present preliminary results of three research projects. By studying GEMS as a case of informal learning, we are learning about the possible benefits of such environments to 1) broaden views of mathematics and 2) support the development of learners’ STEM identities.

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The Impact Of Teacher Talk On Student Engagement During An Integrated Stem Unit, Valarie Bogan Jan 2021

The Impact Of Teacher Talk On Student Engagement During An Integrated Stem Unit, Valarie Bogan

Indiana STEM Education Conference

This study used a hermeneutic phenomenological approach to investigate the effect of teacher talk on the engagement of students in target groups during an integrated STEM unit. Each student in the target groups responded to the teacher talk in a unique way. The results of this study do not fully support the results of prior research because the engagement of only one of the eight target students was affected by the autonomy supportive talk of the teacher during the unit.

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How Does An Integrated Stem Life Sciences Unit Affect Middle School Students' Engagement And Science Content Knowledge?, Zeynep Gonca Akdemir, Muhsin Menekse, Saira Anwar, Siddika Selcen Guzey Jan 2021

How Does An Integrated Stem Life Sciences Unit Affect Middle School Students' Engagement And Science Content Knowledge?, Zeynep Gonca Akdemir, Muhsin Menekse, Saira Anwar, Siddika Selcen Guzey

Indiana STEM Education Conference

This study explored the effect of an integrated engineering design-based life sciences unit on middle school students' engagement and science content knowledge, and the role of engagement in predicting their success. Participants were 530 seventh-grade students from rural schools in the Midwest region of the United States. Data included science content pre- and post-assessments and a multidimensional engagement survey. The data were analyzed by conducting paired-sample t-tests and multiple regression analysis. Results indicated that students' social engagement increased when they engaged in an integrated engineering design-based life science curriculum unit. Also, students’ pre-assessment scores were found to be the …

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Goals And Proceedings Information, William S. Walker Iii, Lynn A. Bryan, Siddika Selcen Guzey, Elizabeth Suazo-Flores Jan 2021

Goals And Proceedings Information, William S. Walker Iii, Lynn A. Bryan, Siddika Selcen Guzey, Elizabeth Suazo-Flores

Indiana STEM Education Conference

No abstract provided.

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Where To Start And How To Judge? First And Third Graders' Measurement Conceptions, Ana-Maria Haiduc, Laura Bofferding, Mahtob Aqazade, Lizhen Chen, Sezai Kocabas Jan 2021

Where To Start And How To Judge? First And Third Graders' Measurement Conceptions, Ana-Maria Haiduc, Laura Bofferding, Mahtob Aqazade, Lizhen Chen, Sezai Kocabas

Indiana STEM Education Conference

We analyzed students’ responses to a series of broken ruler measurement tasks in the form of incorrect worked examples. The measurement tasks challenged students’ initial conceptions of where the measurement starts and how to determine the overall length.

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Environmental Injustice, A City In Crisis: The Use Of Informal Science, Crystal Nettles, Jomo Mutegi Jan 2021

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.

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Harvest Of The Month, Abigail E. Heidenreich Jan 2021

Harvest Of The Month, Abigail E. Heidenreich

Indiana STEM Education Conference

Harvest of the Month curriculum exists in many states, but Indiana lacks a statewide effort in this area. To meet this need, collection of lessons with complementary activities that are specific to Indiana agriculture were created. The driving force behind the curriculum was to create a lesson that is fun and engaging for students, but also well-rounded and standards-based for teachers. Components of the lesson include Life Cycle Discussions, Taste Testing, Interactive Activities, and Journal Prompts. Partnering with Indiana farmers, a harvest video was created to accompany each lesson that features a different agricultural product grown in Indiana each month. …

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A Review Of The Effects Of Dietary Restriction, Dehydration, And Caffeine Withdrawal On Cognition: Implications For A Disabled Submarine Scenario, Sarah Chabal Dec 2020

A Review Of The Effects Of Dietary Restriction, Dehydration, And Caffeine Withdrawal On Cognition: Implications For A Disabled Submarine Scenario, Sarah Chabal

Journal of Human Performance in Extreme Environments

In the event that submariners become trapped aboard a disabled submarine (DISSUB), they must perform a multitude of cognitively demanding tasks in order to maximize their likelihood of survival. During this time, submariners will also be forced to endure poor living conditions, including drastic changes to their nutrition. These nutritional changes have the potential to impair submariners’ cognitive functioning and affect operational performance, which could jeopardize survival; however, the effects of DISSUB nutrition on cognitive performance are not well understood. This review first describes the unique nutritional conditions that submariners will experience in a DISSUB scenario, including the change to …

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Elementary Teachers’ Responsiveness To Supporting Students’ Engineering Design Feedback, Jeffrey Radloff, Brenda Capobianco Dec 2020

Elementary Teachers’ Responsiveness To Supporting Students’ Engineering Design Feedback, Jeffrey Radloff, Brenda Capobianco

Purdue Center for Early Learning Faculty and Staff Publications

Using engineering design to teach science requires teachers to engage in noticing, interpreting, and responding to students’ needs in real-time. While research has begun to focus on how elementary teachers do so, less is known about how teachers instructionally support and optimize students’ ideas through engineering design feedback. In this study we investigate what instructional moves two elementary teachers’ employ to leverage students’ ideas and reasoning and create opportunities for students to exchange design feedback. Data were gathered using classroom observations of teachers’ implementations of a design task focused on sound and energy transformation. Observations were coded for teachers’ use …

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A Survey On Subsurface Signal Propagation, Usman Raza, Abdul Salam Dec 2020

A Survey On Subsurface Signal Propagation, Usman Raza, Abdul Salam

Computer Information Technology Faculty Publications

Wireless Underground Communication (WUC) is an emerging field that is being developed continuously. It provides secure mechanism of deploying nodes underground which shields them from any outside temperament or harsh weather conditions. This paper works towards introducing WUC and give a detail overview of WUC. It discusses system architecture of WUC along with the anatomy of the underground sensor motes deployed in WUC systems. It also compares Over-the-Air and Underground and highlights the major differences between the both type of channels. Since, UG communication is an evolving field, this paper also presents the evolution of the field along with the …

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The Acoustics Of The “Clapping Circle” At Purdue University, Elspeth A. Wing, Steven J. Herr, Alexander D. Petty, Alexander K. Dufour, Frederick H. Hoham, Morgan E. Merrill, Donovan W. Samphier, Weimin Thor, Kushagra Singh, Yutong Xue, Davin H. Huston, J Stuart Bolton Dec 2020

The Acoustics Of The “Clapping Circle” At Purdue University, Elspeth A. Wing, Steven J. Herr, Alexander D. Petty, Alexander K. Dufour, Frederick H. Hoham, Morgan E. Merrill, Donovan W. Samphier, Weimin Thor, Kushagra Singh, Yutong Xue, Davin H. Huston, J Stuart Bolton

Publications of the Ray W. Herrick Laboratories

The unusual acoustical properties of a particular landscape architecture feature of Academy Park on the Purdue University campus have been the subject of speculation for years. The feature, known informally as the “clapping circle,” consists of sixty-six concentric rings of stone tiles. When someone claps while standing at the middle of the circle, they hear a high-pitched squeak immediately afterwards. Experiments were conducted by the Purdue student chapters of the Acoustical Society of America and the Audio Engineering Society to characterize this effect. The response to a clap played from an omnidirectional speaker placed at the center of the circle …

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The Uniform Soybean Tests: Northern Region 2020, Guohong Cai, Adam Brock Dec 2020

The Uniform Soybean Tests: Northern Region 2020, Guohong Cai, Adam Brock

Uniform Soybean Tests Northern Region

The purpose of The Uniform Soybean Tests is to critically evaluate the best of the experimental soybean lines developed by federal and state research personnel in the U.S. and Canada, for their potential release as new varieties. A test is established for each of ten maturity groups. Uniform Test 00 includes maturity Group 00 strains adapted to production in the northern fringe of the present area of soybean production. Uniform Tests 0 through IV include later maturing strains adapted to locations progressively further south in the North Central States and areas of similar latitude. Each year new selections are added …

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The Future Of The German-Jewish Past: Memory And The Question Of Antisemitism, Gideon Reuveni, Diana Franklin Dec 2020

The Future Of The German-Jewish Past: Memory And The Question Of Antisemitism, Gideon Reuveni, Diana Franklin

Purdue University Press Book Previews

Germany’s acceptance of its direct responsibility for the Holocaust has strengthened its relationship with Israel and has led to a deep commitment to combat antisemitism and rebuild Jewish life in Germany. As we draw close to a time when there will be no more firsthand experience of the horrors of the Holocaust, there is great concern about what will happen when German responsibility turns into history. Will the present taboo against open antisemitism be lifted as collective memory fades? There are alarming signs of the rise of the far right, which includes blatantly antisemitic elements, already visible in public discourse. …

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Unmanned And Autonomous Weapons Systems: Practices And Related Policy, Sabriya Alam, Olivia Jimenez, Julia Taylor, Dwaine Jengelley Nov 2020

Unmanned And Autonomous Weapons Systems: Practices And Related Policy, Sabriya Alam, Olivia Jimenez, Julia Taylor, Dwaine Jengelley

Student Papers in Public Policy

As unmanned systems become increasingly prevalent in global militaries, it has become crucial to gain a deeper understanding of the societal implications of the rapid technological advancements in this area, including their ethical implications and effects on public policy. This paper will analyze the technological development and ethical considerations of fully autonomous weapon systems used within the US military and around the world to propose policy development to ensure a conscientious future of warfare.

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Profile Interview With Dr. Jill Newton, Kylie Arnholt, Emma Copp, Kelly Hock, Meredith Marsden Oct 2020

Profile Interview With Dr. Jill Newton, Kylie Arnholt, Emma Copp, Kelly Hock, Meredith Marsden

Purdue Journal of Service-Learning and International Engagement

Dr. Jill Newton has been a professor in the Math Education Department of the College of Education since 2008. She started the Tanzania study abroad program in 2010, and has been taking education and non-education students since. The program goes for a month and the students get to teach in local schools and experience small town life in Tanzania. Students take classes to get towards their Global Studies minor, and get to live at Fish Eagle Point during their stay. The curriculum is focused on teaching across cultures and learning about the education system worldwide, but most importantly, students are …

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