Digital Commons Network^™

Improving Developers' Understanding Of Regex Denial Of Service Tools Through Anti-Patterns And Fix Strategies, Sk Adnan Hassan, Zainab Aamir, Dongyoon Lee, James C. Davis, Francisco Servant

Department of Electrical and Computer Engineering Faculty Publications

Regular expressions are used for diverse purposes, including input validation and firewalls. Unfortunately, they can also lead to a security vulnerability called ReDoS (Regular Expression Denial of Service), caused by a super-linear worst-case execution time during regex matching. Due to the severity and prevalence of ReDoS, past work proposed automatic tools to detect and fix regexes. Although these tools were evaluated in automatic experiments, their usability has not yet been studied; usability has not been a focus of prior work. Our insight is that the usability of existing tools to detect and fix regexes will improve if we complement them …

An Empirical Study Of Pre-Trained Model Reuse In The Hugging Face Deep Learning Model Registry, Wenxin Jiang, Nicholas Synovic, Matt Hyatt, Taylor R. Schorlemmer, Rohan Sethi, Yung-Hsiang Lu, George K. Thiruvathukal, James C. Davis

Department of Electrical and Computer Engineering Faculty Publications

Deep Neural Networks (DNNs) are being adopted as components in software systems. Creating and specializing DNNs from scratch has grown increasingly difficult as state-of-the-art architectures grow more complex. Following the path of traditional software engineering, machine learning engineers have begun to reuse large-scale pre-trained models (PTMs) and fine-tune these models for downstream tasks. Prior works have studied reuse practices for traditional software packages to guide software engineers towards better package maintenance and dependency management. We lack a similar foundation of knowledge to guide behaviors in pre-trained model ecosystems.

In this work, we present the first empirical investigation of PTM reuse. …

In Situ Optical Observations Of Degradation Of Thermal Greases With Thermal Cycling, R. V. Kulkarni, P. P. Nagrani, A. M. Marconnet

CTRC Research Publications

No abstract provided.

On The Fast Prediction Of The Aerodynamic Performance Of Electronics Cooling Fans Considering The Effect Of Tip Clearance, W. Zhao, S. Wasala, T. Persoons

CTRC Research Publications

No abstract provided.

Usability Evaluation Of A Community Pharmacy Health Information Exchange Interface Prototype, Katelyn N. Hettinger, Margie E. Snyder, Omolola A. Adeoye-Olatunde, Alissa L. Russ-Jara

Department of Pharmacy Practice Faculty Publications

Objective
Few community pharmacies have access to health information exchange (HIE) data. We conducted a first-of-its-kind usability evaluation of an HIE interface prototype (referred to throughout as the “HIE-Pioneer mock-up”) developed with pharmacists and pharmacy technicians to aid future implementation in community pharmacies.

Methods
Community pharmacists and pharmacy technicians were recruited to complete usability evaluations with the HIE-Pioneer mock-up. Each usability evaluation lasted up to 60 minutes. System usability scale (SUS) scores were collected from each participant following each usability evaluation session and summarized with descriptive statistics. Usability evaluation videos were reviewed for common usability attributes, such as the impact …

Disparities In Medicare Beneficiaries’ Receiving Medication Synchronization, Prajakta H. Waghmare, Chien-Yu Huang, Heather A. Jaynes, Wendy M. Green, Margie E. Snyder, Omolola A. Adeoye-Olatunde, Antoinette B. Coe, Joel F. Farley, Alan Zillich

Department of Pharmacy Practice Faculty Publications

Background

Medication synchronization (med-sync) aligns patients’ monthly or quarterly chronic medications to a predetermined single pickup date at a community pharmacy. The study objective was to examine med-sync enrollment disparities based on Medicare beneficiaries’ predisposing, enabling, and need characteristics.

Methods

This was a retrospective cohort study using a Medicare dataset of beneficiaries receiving medications from pharmacies that self-identified as providing med-sync. Medicare beneficiaries who were continuously enrolled in fee-for-service medical and pharmacy benefits during the study period (2014–2016) were included. Study cohorts (med-sync and non–med-sync patients) were defined, and bivariate and multivariable logistic regression analyses were performed. Andersen’s Health …

Data-Driven Rheological Characterization Of Stress Buildup And Relaxation In Thermal Greases, P. P. Nagrani, R. V. Kulkarni, P. U. Kelkar, R. D. Corder, K. A. Erk, A. M. Marconnet, I. C. Christov

CTRC Research Publications

No abstract provided.

Evaluating Ethics Of Machine Learning: Industry 4.0 Implementation In Aerospace And Defense Industries, Lina Khan, Ahmad Elshennawy, Sandra Furterer, Elizabeth Cudney, Chad Laux

Faculty Publications

No abstract provided.

Teachers' Instructional Strategies In Integrated Stem Education, Yousef Alrashdi, Paul A. Asunda

Indiana STEM Education Conference

Integrated Science, Technology, Engineering, and Mathematics (iSTEM) education has been regarded as a model that provides students with skills necessary for future careers and enhances the economy of nations. Although there is a considerable body of research on the effective educational approaches in iSTEM education including problem-based and project-based learning, the ways teachers implement these approaches remain ambiguous due to a paucity of consensus about how to effectively use iSTEM approaches in classrooms (Thibaut et al., 2018). Additionally, there is a need for further investigation to understand teachers’ instructional strategies and practices in iSTEM education (Bush, 2019). To fulfill this …

Integrated Stem: Impact Of Engineering Design And Computer Science In Stem Labs, Jason Morphew, Ruben Lopez, Amir Bralin, Ravishankar Chatta Subramaniam, Sanjay Rebello, Carina Rebello

Indiana STEM Education Conference

By integrating physics laboratories with engineering design and computer science, students apply physics principles to ill-structured and complex problems, engage in knowledge transfer, and gain interest in STEM. The introductory physics labs at Purdue have been updated to include engineering design and computer science principles that ground physics in authentic problems. Integrated labs have been evaluated using student perception post-surveys, student course performance, interviews, and case-study observations. Preliminary results indicate that integrated physics labs promote transfer, enhanced metacognitive skills, student interest, and motivation.

Achieving Equity And Excellence: A Multilevel Modeling Of The Relationships Among School Climate, Students’ Motivation, And Achievement With Timss 2019, Yao Yang, Tugce Karatas, Tybresha Ebony Glass

Indiana STEM Education Conference

This study examined the effects of students’ motivational factors and school climate factors on eighth-grade math and science achievement in the U.S. using data from the 2019 Trends in International Mathematics and Science Study (TIMSS). Two-level, cross-sectional hierarchical linear models were developed to analyze the data. The results showed that there was a significant variation in math and science achievement across schools. Only students’ confidence in math and school SES had statistically significant effects on students’ math achievement. School location and school SES had statistically significant effects on science achievement.

Bell Hooks Feminist Pedagogy In The Library Classroom, Melissa Chomintra

Libraries Faculty and Staff Scholarship and Research

No abstract provided.

Engineering Technology Programs And Technical Standards: Investigating Library Access And Course Integration, Margaret Phillips, Paul B Mcpherson, Danielle Leclerc

Libraries Faculty and Staff Scholarship and Research

Due to ABET accreditation requirements and industry expectations, integrating technical standards into Engineering Technology (ET) curricula is crucial for student success. However, previous studies have shown that faculty report access and knowledge challenges in working to integrate standards into ET course content. Additionally, academic librarians have long acknowledged there are many issues with providing access to standards to campus users, such as high costs and extensive digital rights management (DRM) restrictions. The purpose of this study is to conduct an environmental scan of library websites at institutions with ET programs to investigate library-provided access to standards and to survey ET …

Data Quality Checking Guide, Wei Zakharov

Libraries Faculty and Staff Scholarship and Research

A data quality checking guide has been developed to facilitate undergraduates on the critical aspects of data quality assessment. The goal is to become competent data consumers and data generators as well. This checking guide encompasses six fundamental dimensions: Data Credibility, Timeliness, Information Completeness, Data Accuracy, Data Consistency, and Data Deduplication. These dimensions are frequently cited in scholarly references on data quality. Each dimension plays a crucial role in ensuring the reliability and usability of data. Scenarios of students' work are also discussed.

Innovation In Quantum Pedagogy, Application, And Its Relation To Culture (Iqparc), Zeynep Gonca Akdemir, Dongyang Li, Muhsin Menekse, Mahdi Hosseini, Erica W. Carlson, Nicholas Dang

Indiana STEM Education Conference

Innovation in Quantum Pedagogy, Application, and its Relation to Culture (IQ-PARC) is a team of Purdue faculty, graduate, and undergraduate students who collaborate and work for the National Defense Education Program (NDEP) for Science, Technology, Engineering, and Mathematics (STEM) education, outreach, and workforce initiative programs. We promote a STEM-literate workforce by providing learning opportunities for youth to understand basic principles and applications of quantum concepts through a variety of both face-to-face and online activities. This research brief describes accomplished tasks in the K-12 education space (e.g., quantum-infused middle school curriculum unit) and shares upcoming plans within the project timeline.

Teachers' Beliefs As A Tool To Extend The Cognitive Equity Concept, Ana-Maria Haiduc, Rose Mbewe, Signe E. Kastberg

Indiana STEM Education Conference

This research aims to extend the framing of the cognitive equity concept in teaching mathematics during the enacted phase of the curriculum beyond race and culture. Cognitive equity characterizes actions of teachers and curricula makers toward valuing differences in cognitive processes. Since beliefs influence teachers' actions, we investigate their ideas about valuing students' unique mathematical cognitive processes. Framing cognitive equity in teaching mathematics contributes to discovering teachers' equitable practices, thus revealing teachers' ways of making more inclusive cognitive curricular decisions. Future research could focus on framing cognitive equity in learning mathematics within the intended and implemented phase of the curriculum.

Thinking With Algebra: Two Professors' Perspectives, Natalie Mcgathey, Bir Kafle, David Feikes

Indiana STEM Education Conference

This research brief will share insights from using the curriculum, Thinking With Algebra (TWA), a National Science Foundation Project (DUE 2021414). The focus will be on the value of using this curriculum when working specifically with students who have taken Algebra I and Algebra II in high school, but were not prepared for college algebra or precalculus. This curriculum is specifically designed for STEM-track students who place below the level of college algebra when they enter college. The authors have found that TWA helps instructors honor the mathematical knowledge and ideas that students bring into the classroom. The curriculum units …

Investigating Elementary Teachers’ Use Of Mathematics Curriculum Materials, Jueqing Li, Doris Fulwider, Jill Newton

Indiana STEM Education Conference

Investigating Elementary Teachers’ Use of Mathematics Curriculum Materials is a collaborative research project across four universities. The primary goal of the project is to explore teachers’ use of mathematics curricular materials in the context of the proliferation of online resources and the COVID-19 pandemic, with a focus on curricular coherence, teacher autonomy, and the use of teacher-developed curriculum from sites such as Teachers-Pay-Teachers and Pinterest. We used individual and focus group teacher interviews at several schools representing diverse curricular contexts to explore both the quantitative and qualitative aspects of the teachers’ mathematics curricular decision making. Findings from this study highlight …

Developing Sustainability Related Attitudes And 21st Century Skills Through Informal Learning Opportunities, Shamila Janakiraman

Indiana STEM Education Conference

Informal learning environments, like libraries and museums, are known to improve student achievement and motivation (Bartels 2001). A meta-analysis reports on the strong positive effects of after-school programs on feelings and attitudes and school performance (Durlak et al, 2007). When working on after-school programs, middle and high school students may develop skills like communication, collaboration, creativity, critical thinking, information literacy, and digital literacy. Such a program was offered by a 501c(3) organization as an informal learning opportunity. As part of this program, high school student volunteers living in the United States (US) designed and delivered learning experiences for elementary and …

Wave-Powered Batch Reverse Osmosis Buoy, Austin Howse, Camden Frieling, Cooper Ford, Imaan Qazilbash, Joel Veihl, Mariya Savchenko, Ryan Vulich, Sultan Alnajdi, Abhimanyu Das, Antonio Esquivel-Puentes, Ali Naderi Beni, David M. Warsinger, José Garcia-Bravo

School of Mechanical Engineering Faculty Publications

As populations grow across the world, the availability of freshwater at a reasonable cost has become a growing concern to many nations. An estimated 1.1 billion people do not have access to safe drinking water [5]. Many of these areas also exist in coastal communities which get burdened by severe weather storms. During these occasions, access to clean drinking water drastically decreases. Combining this with the potential for ocean energy, access to clean drinking water can be derived with a potential solution. The ocean contains abundant resources that comprise of untapped wave-powered energy, unharvested salt water to be turned potable, …

It's Never Too Soon! Comparing Intercultural Learning Outcomes Of Undergraduate Students Via Face-To-Face And Online Teaching Modalities, Aparajita Jaiswal, Christi Masters, Lan Jin, Tanvin Inani, Annika Schenkel, Muna Sapkota, Lata Krishnan

Department of Speech, Language, and Hearing Sciences Faculty Publications

Purpose: Providing culturally responsive care for a diverse patient population is critical for future speech-language pathologists and audiologists. Prior studies have shown gains in intercultural competence (ICC) from study abroad programs, face-to-face classes, and online courses; however, limited studies have investigated differences between face-to-face and online modes of delivery in speech-language pathology and audiology. The purpose of this study was (a) to evaluate whether there are quantitative differences in development of ICC in a direct comparison of a face-to-face and 100% asynchronous online introductory in communication dis-orders, and (b) to describe participants learning through the structural intercultural learning activities embedded …

Effectiveness And Characteristics Of A New Technology To Reduce Ammonia, Carbon Dioxide, And Particulate Matter Pollution In Poultry Production With Artificial Turf Floor, Ji-Qin Ni, Marisa Erasmus, Deana R. Jones, Dana L.M. Campbell

School of Agricultural & Biological Engineering Faculty Publications

Ammonia (NH₃), carbon dioxide (CO₂), and particulate matter (PM) are three major aerial pollutants that threaten the health of workers and animals in poultry production. An experiment was conducted in four laying hen rooms, with 735 to 740 hens per room, to study a new technology using artificial turf (AstroTurf®) floor for mitigation of the three pollutants. Air was sampled at three locations in each room to measure ammonia and carbon dioxide concentrations with an Innova 1412 multi-gas monitor for 83 days. Particulate matter was measured at one location at bird height in each room using …

Developing Customized Nrcs Unit Hydrographs (Finley Uhs) For Ungauged Watersheds In Indiana, Tao Huang, Venkatesh Merwade

JTRP Technical Reports

The Natural Resources Conservation Service (NRCS, formerly the Soil Conservation Service, SCS) unit hydrograph (UH) is one of the most commonly used synthetic UH methods for hydrologic modeling and engineering design all over the world. However, previous studies have shown that the application of the NRCS UH method for some ungauged watersheds in the state of Indiana produced unrealistic flood predictions for both the peak discharge and the time to peak. The objective of this work is to customize the NRCS UH by analyzing the role of its two key parameters, namely, the peak rate factor (PRF) and …

Development Of Protocols For Reuse Assessment Of Existing Foundations In Bridge Rehabilitation And Replacement Projects, Jeehee Lim, Rodrigo Salgado, Monica Prezzi, Yao Wang, Fei Han

JTRP Technical Reports

The existing foundations of a bridge can sometimes be reused. This may occur when a completely new bridge is built but also in bridge or superstructure widening projects. Reuse of existing foundations not only eliminates the costs associated with demolishing and disposing of old foundations, but also reduces the costs of the design and construction of new foundation elements. However, several challenges exist, including assessing the structural integrity, estimating the current capacity, estimating the remaining service life, and considering current design codes and specifications of the existing foundations, and clear guidelines for foundation reuse. The absence of foundation reuse guidelines …

202312-01, 12/01/2023, I-74 E, Mm 3, Vermillion Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

202312-04, 12/07/2023, I-65 N, Mm 148, Boone Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

202304-04, 04/20/2023, I-65 S, Mm 177, Tippecanoe Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

202311-01, 11/02/2023, I-65 N, Mm 172, Tippecanoe Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

202312-07, 12/18/2023, I-70 E, Mm 30.9, Montgomery Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

202312-12, 12/22/2023, I-65 N, Mm 259, Lake Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.