Digital Commons Network^™

The Current State Of Dimensioning And Tolerancing Pedagogy In United States Post-Secondary Engineering And Engineering Technology Programs, Jaime Berez, Rustin Webster, Rudy Ottway

School of Engineering Technology Faculty Publications

Dimensioning and tolerancing (D&T) is understood to be a crucial element of the engineering product lifecycle and has been documented as an important skill for various careers, e.g., engineering, design, manufacturing, and metrology. Even so, there is a widely perceived skills gap in today's workforce. In response to this perceived misalignment between employer expectations and student preparation, a survey of post-secondary engineering and engineering technology (ET) degree programs in the United States was conducted to quantitatively characterize the current state of D&T pedagogy. Respondents (n = 67) who identified as being the instructor-of-record for a course(s) that required students to …

Matter & Change, Carlie Cox

2nd Grade

No abstract provided.

Light!, Daniela Manzanero

1st Grade

No abstract provided.

Parents And Offspring Comparison, Elise Louk

1st Grade

No abstract provided.

Vibtac: A High-Resolution High-Bandwidth Tactile Sensing Finger For Multi-Modal Perception In Robotic Manipulation, Sheeraz Athar, Xinwei Zhang, Jun Ueda, Ye Zhao, Yu She

School of Industrial Engineering Faculty Publications

Tactile sensing is pivotal for enhancing robot manipulation abilities by providing crucial feedback for localized information. However, existing sensors often lack the necessary resolution and bandwidth required for intricate tasks. To address this gap, we introduce VibTac, a novel multi-modal tactile sensing finger designed to offer high-resolution and high-bandwidth tactile sensing simultaneously. VibTac seamlessly integrates vision-based and vibration-based tactile sensing modes to achieve high-resolution and high-bandwidth tactile sensing respectively, leveraging a streamlined human-inspired design for versatility in tasks. This paper outlines the key design elements of VibTac and its fabrication methods, highlighting the significance of the Elastomer Gel Pad (EGP) …

The Aftermath Of An Earthquake: Healing Power Of Engineering For Turkish Elementary School Children, Pinar Fettahlioglu, Senay Purzer, Cagan Findikkiran

Indiana STEM Education Conference

The February 6th, 2023, earthquake significantly impacted children in Turkey, causing both physical and emotional challenges. To help students enhance their understanding of earthquakes and their impact, we have integrated engineering-based STEM activities in a 5th-grade classroom. Students designed earthquake-proof structures and tested their strength. The research involved 15 students from the earthquake-affected region of Adana. Data included a conceptual understanding scale using a single-group pre-test and post-test design. Analysis indicated that students had limited prior knowledge about the causes of and safety measures for earthquakes before the intervention. Post-test results revealed statistically significant improvements in their learning.

Mgo Boards – The Tension Between Innovation And Standardisation, D. Mcpolin, T. Aiken, M. Russell, L. Bagnall

International Conference on Durability of Concrete Structures

National and international test standards are critical to how we use and design cementitious materials. However, there are occasions when products, such as magnesium oxychloride boards, do not fall within existing harmonised standards. Technical Assessment Bodies do provide a way of allowing the introduction of new materials via European Technical Assessment or British Board of Agrément certification. Such certification should provide confidence to insurance bodies and building owners in the absence of a national standard, which can take many years to emerge. This paper discusses the fundamental science and testing of MOC boards and the discovery of startling difference in …

In-Situ Tests Of Transport Properties Of Near-Surface Concrete, Kai Yang, P.A. Muhammed Basheer, Fengyuan Yang, Da Xia, Basilios Tsikouras

International Conference on Durability of Concrete Structures

Determining the water permeability of concrete in structures remains a conundrum because of difficulties in removing the influences of moisture. This study describes the extended flow-net theory developed on the basis of the two-pressure head concept, which provides a means of measuring permeability under the partially saturated condition. Surface mounted tests and the standard laboratory water penetration tests were carried out to verify this approach. Before determining the water permeability, steady state flow rates at two different pressure levels were evaluated and the effects of initial moisture conditions on flow behaviour were investigated. The results indicate that the proposed approach …

Integrating Turtle Graphics And Engineering Design: Enhancing Problem-Solving And Critical Thinking Through Digital And Physical Prototyping, Abigail Erskine

Indiana STEM Education Conference

This research brief is a review of literature on integrating Turtle Graphics and engineering design to enhance students' problem-solving and critical thinking through prototyping. Integrating Turtle Graphics with digital and physical prototyping engages students in the engineering design process, helping them bridge abstract mathematical concepts with real-world applications. By combining programming and engineering design, Turtle Graphics supports complex tasks like visualization and design modeling, which improves students’ critical thinking, design thinking, and problem-solving skills. Through iterative testing and refinement, students gain practical insights into engineering concepts such as modeling and creating prototypes.

Proceedings Of The Tenth Annual Indiana Stem Education Conference: Generational Advances Through Stem Education, William S. Walker Iii, Lynn A. Bryan, S Selcen Guzey

Indiana STEM Education Conference

The Proceedings of the Tenth Annual Indiana STEM Education Conference are edited by the Center for Advancing the Teaching and Learning of STEM (CATALYST, https://www.education.purdue.edu/catalyst/) at Purdue University. The theme for the 2025 conference is Generational Advances through STEM Education. This year’s conference provides opportunities to learn about effective STEM education strategies, curriculum, and resources to engage students by considering the advances and impact of STEM.

Thermo-Mechanical Behaviour Of Preloaded Low Cement Concrete Under Heating And Cooling Phase Of Fire Exposure, Mahadev Sitaram Rokade, James Lui, Yu Sheng, Tim Stratford, David Rush, Benny Suryanto

International Conference on Durability of Concrete Structures

Understanding the structural performance of concrete under fire, particularly during the cooling phase, is critical to ensuring post-fire safety. Concrete columns, as primary load-bearing elements, are especially vulnerable under such conditions. While Ordinary Portland Cement (OPC) concrete has been widely studied in fire, limited research has addressed the behaviour of sustainable alternatives such as Ground Granulated Blast Furnace Slag (GGBS) concrete, particularly under realistic thermal decay scenarios. GGBS, a by-product of steel production, offers a low-carbon alternative to OPC, reducing embodied CO₂ while enhancing long-term durability. This study investigates the fire response of 100 mm × 200 mm cylindrical specimens …

Steel Fiber Dosage In Magnesium Potassium Phosphate Cement Effects On Mechanical And Durability Properties, Zheng Wang, Yanfeng Guan, Minghao Mu, Hongyue Zhu, Chen Yan, Zhenwei Dong, Pengkun Hou

International Conference on Durability of Concrete Structures

Magnesium potassium phosphate cement (MKPC) plays a significant role as a rapid repair material in road and bridge infrastructure, owing to its fast-setting and high early strength properties. However, its crack resistance and bonding performance still pose challenges, which can impact both the repair effectiveness and the long-term service life of MKPC-based repairs. The addition of steel fibres can improve its strength and toughness. In this paper, the effect of steel fibre dosage on the processing performance and bonding properties of MKPC is investigated. The results show that the flow properties of MKPC remain stable at a dosage of 1%. …

Multiscale Decoupling Analysis Of Concrete Durability And Interfacial Micromechanics Using Afm-Qnm, Yu Shao, Jie Rong, Yue Liu, Yongzhi Guo, Baolin Guo, Qinfei Li

International Conference on Durability of Concrete Structures

To address the coupled effects of cementitious materials, aggregates, and air content on the salt freeze–thaw resistance of concrete, this study proposes a multiscale decoupling analysis method that integrates macroscopic performance testing with nanoscale mechanical characterization. Concrete specimens were prepared using various binder systems (ordinary Portland cement and slag/fly ash-blended systems), aggregate types (granite and limestone), and target air contents ranging from 3% to 6%. Salt freeze–thaw tests were conducted in a 5% NaCl solution, accompanied by permeability testing, freeze–thaw durability evaluation, and air-void spacing factor measurements. Salt freeze–thaw damage was quantitatively assessed based on mass loss and relative dynamic …

Development Of An Integrated Unmanned Aerial System (Uas) Validation Center, Robert J. Connor, Jose Capa Salinas

JTRP Affiliated Reports

Unmanned Aerial Systems (UAS) have the potential to drastically change how civil infrastructure is inspected, monitored, and managed. This innovative technology can ensure the inspector’s safety, provide additional inspection information, and reduce costs. However, a challenge arose as this industry expanded: a lack of standardized guidelines or minimum performance requirements to perform these operations. With no standard tests to verify UAS’ ability to conduct inspections and unknown detection capabilities, agencies are left to rely upon consultants’ or vendors’ promotional material and claims when considering UAS deployment. The following pooled fund project proposes a series of performance-based assessments and procedural documentation …

Medieval Misinformation And Disinformation: Filling A Gap In Medieval Studies, Kristin B. Leaman

Libraries Faculty and Staff Scholarship and Research

Misinformation and disinformation are well-known terms that bring a plethora of topics to mind, such as fake news, conspiracy theories, social media, economic inequity, power imbalances, social justice, confirmation bias, political polarization, and/or health information within a more modern/contemporary context. While it is no secret that mis/disinformation have been present in our societies for centuries, it is not an area that has been fully examined in Medieval Studies. This article argues that the lack of scholarship on medieval mis/disinformation stems from a gap in the medieval studies curriculum and provides solutions to this problem, including a brief outline of a …

Assessing The Asset Management Programs Of Locals: Bridges And Pavement Conditions, Richard Ajagu, Dongyoon Song, David Holguin Mejia, Deepak Benny, Mohammadhosein Pourgholamali, Isaiah C. Mwamba, Kumares Sinha, Samuel Labi

JTRP Technical Reports

Indiana’s 2016 House Enrolled Act (HEA) 1001 provided a funding mechanism for transportation infrastructure that required Local Public Agencies (LPAs) to have an Asset Management Plan (AMP) to be eligible for funding. In 2022, the Indiana General Assembly desired to know the extent to which LPAs had adopted AMPs in response to this legislation. This study’s literature review found that LPAs nationwide are increasingly adopting asset management practices. Analysis of aggregate data on local road expenditures and revenues in Indiana showed significant reductions in maintenance expenditures in post-HEA 1001-2016 years, suggesting the efficacy of the 2016 legislation. The data trend …

Autonomous Mower Pilot Project, John T. Evans, Greg M. Shaver, Michael A. Mardikes, Nathan C. Sprauge, Timothy J. Wiegman, Shreyas Supe, Ethan M. Brown

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) spends approximately $19 million annually on roadside mowing, which is a process that is time-consuming, costly, and poses safety risks. Automated mowing solutions have the potential to reduce costs and increase safety, but they will need to be extremely well tested before being deployed. In this work, data from current mowing practices was collected using machine mounted cameras, which was used to inform the creation of a digital twin environment that allows for rigorous initial testing of potential autonomous solution with no risk. The digital twin was created using digital elevation models of Indiana …

Safety Performance Of Non-Signalized Traffic Control Strategies, Andrew P. Tarko, Mario A. Romero, Vamsi Krishna Bandaru, Qiming Guo, Lucas Florez

JTRP Technical Reports

The Indiana safety management program targets the reduction of crashes at high-speed, two-way stop-controlled (TWSC) intersections, which are responsible for 8.2% of serious crashes statewide that cause approximately 1,000 serious injuries and over 90 fatalities annually. Key risk factors include human error, high traffic volumes, and high speeds. Despite the implementation of measures, such as alternative intersection designs and enhanced visibility, additional countermeasures are needed to further mitigate these risks at rural TWSC intersections with lower traffic volumes. Intersection Conflict Warning Systems (ICWS) presents a promising solution by alerting drivers to potential vehicle conflicts.

The main objective of this study …

Feasibility Of Utilizing Native Grasses And Forbs In Lieu Of Exotic Cool Season Grasses On Roadside Rights-Of-Way, Wesley Bollinger, Rabin Bhattarai, Jeffrey W. Matthews

JTRP Technical Reports

We assessed the status of 34 native species plantings along roadsides in Indiana and Illinois and evaluated soil conditions, distance from road, and surrounding landscape cover to determine which factors led to successful long-term establishment of plantings. Cover by seeded native species and native species overall increased with distance from road and decreased with increasing soil nitrate and phosphorous. Number of native species and seeded native species increased with distance from road and greater seed mix diversity. In contrast, richness of non-native, non-seeded species was greater at shorter distances from road. Across all sites, 84 of the 150 native species …

A Study Of Suburban Arterial Safety Performance Based On Median Type, Andrew Tarko, Qiming Guo, Priya Darshini Narayanan, Mario A. Romero, Vamsi K. Bandaru

JTRP Technical Reports

Suburban arterial roadways must serve two conflicting road functions: regional mobility and access to the abutting land. The potential for conflicts between traffic passing through and traffic accessing road from the neighboring areas could raise safety concerns. Selecting an adequate cross-section is among important decisions that road designers and traffic engineers consider when mitigating the mentioned conflict. The following three alternative treatments offer different access control levels: undivided cross-section with no median, two-way left-turn lane instead of a typical median, and non-traversable median. The frequency of access points and the selected median treatment option should be commensurate.

Although it is …

Roadside Right-Of-Way Maintenance Strategies, Cheryl Daniels, Angela Burdell, Patrick Ewbank, Keith Shane

JTRP Technical Reports

The Indiana Department of Transportation’s (INDOT) roadside management program is tasked with multiple items across the state’s 39,000 lane miles. Roadside maintenance is an essential task that keeps INDOT’s rights-of-way (ROWs) safe and functional for drivers. Most roadside vegetation maintenance work for INDOT is outsourced, and INDOT’s in-house staff perform any follow-up vegetation maintenance as needed. INDOT needs to focus on cost-efficient solutions due to budgetary constraints from increased labor, equipment, and contractor costs and no budgetary increases.

INDOT contracted Davey Resource Group, Inc. (DRG) to provide recommendations for updates to INDOT’s roadside ROW vegetation maintenance strategies. DRG completed a …

Practical Implementation Of Superabsorbent Polymers (Sap) For Internally Cured Concrete, Chibueze Sylvester Ajuonuma, Raikhan Tokpatayeva, Akul N. Seshadri, Jan Olek, Kendra Erk, Alberto Castillo

JTRP Technical Reports

Laboratory investigations and results from a year-long field trial demonstrated that plain Type IL cement and slag cement concrete that was internally cured by superabsorbent polymer (SAP) has increased strength and durability compared to SAP-free mixtures, mixtures containing colloidal nanosilica, and mixtures that were externally cured with a surface-applied curing compound. SAP was successfully delivered to fresh concrete mixtures at the ready-mixed concrete plant by using dissolvable bags containing premeasured amounts of dry SAP particles. No batching adjustments were necessary to successfully utilize SAP in the concrete mixtures.

Investigation Of Low Friction On Asphalt Pavements, Jieyi Bao, Cheng Peng, Xiaoqiang Hu, Yi Jiang, Jusang Lee, Shuo Li, Ayesha Shah

JTRP Technical Reports

This study explores low-friction issues in specific asphalt pavements utilizing dolomite aggregates within an Indiana Department of Transportation district. It examines the frictional characteristics of these aggregates, concentrating on initial friction (PSV0) and long-term friction retention (PSV10). Employing a mix of laboratory tests, field data analysis, and statistical modeling, the research assesses how mechanical, physical, and chemical properties influence the overall friction behavior of dolomite aggregates.

The evaluation of Design Mix Formulas (DMFs) revealed no statistically significant effect on pavement friction, with variations more closely tied to aggregate quality and construction practices rather than the mix design itself. Inconsistent friction …

Systematic Study Of Type 1l Cement For Mixture Optimization And Carbon Reduction, Jookyeung Sung, Rui He, Na (Luna) Lu, Yining Feng

JTRP Technical Reports

The use of Portland Limestone Cement (PLC, Type 1L), a sustainable alternative to Ordinary Portland Cement (OPC), has gained traction in the United States as a means to reduce the carbon footprint associated with concrete production. Despite its environmental benefits, the inconsistent field performance, particularly with respect to strength development, durability, and admixture compatibility, has raised concerns about its application. This study aims to systematically evaluate the performance of PLCs in terms of material properties, mechanical behavior, durability, and microstructural characteristics, with the goal of informing optimized mixture designs and supporting broader implementation of PLC in infrastructure applications.

Three cement …

Feasibility Of 3d Scanning Technology For Bridge Inspection And Management, Kyubyung Kang, Jinwu Xiao, Jiashu Hu, Deven Kanakamedala, Jungil Seo, Amit Varma

JTRP Technical Reports

This report evaluates the feasibility of 3D scanning technologies, including LiDAR, terrestrial laser scanning (TLS), and UAV photogrammetry, for improving bridge inspection practices. The study identifies challenges in adopting these technologies, particularly for detecting corrosion, section loss, and deformation in steel girders and other critical structural components. A framework is developed to integrate 3D scanning data with defect detection and structural analysis tools, ensuring compatibility with existing bridge inspection and asset management systems. The report provides practical guidelines for optimizing scanning strategies, data processing workflows, and implementation procedures to support Indiana’s bridge inspection practice. The proposed framework is designed to …

Research Support To Indot On I-465 Southeast Variable Speed Limit And Ramp Meter Project, Jairaj Desai, Christopher Gartner, Rahul Suryakant Sakhare, Edward D. Cox, James Sturdevant, Darcy M. Bullock

JTRP Technical Reports

Traditionally, crash data, crash risk models, video recordings and user surveys have been utilized by agencies to measure the safety benefits of ramp metering technology. Connected vehicle data can now provide an agile evaluation alternative for quantifying impact of ramp meter deployments. Furthermore, in contrast to crash data, connected vehicle near miss events occur much more frequently, so the before-after evaluation can be conducted over a much shorter time period consisting of a few months, or perhaps even a few weeks.

Indiana deployed ramp meters on the southeast section of I-465 around Indianapolis, on or around May 14, 2024, which …

Enhanced Traffic Pattern Knowledge Abstraction And Presentation From 511 Database, Jiannan Ding, Liya Koshy, Tanay Maheshwari, Abin Mathew, Jue Zhou, Stanley Chien, Tianyi Li, Chengcheng Tao, Yaobin Chen

JTRP Technical Reports

The explosive growth in the volume, variety, and velocity of transportation data has placed considerable strain on traditional data infrastructures employed by state departments of transportation (state DOTs). Existing traffic information systems are constrained by fragmented data streams, limited historical archiving, and inadequate interoperability, thereby hindering their utility for comprehensive analysis, causal inference, and predictive modeling. This study addresses these challenges by presenting the design and initial implementation of a traffic data integration platform that unifies multi-source datasets and establishes a foundation for more applications. The platform focuses on data integration and access, incorporating systematic data ingestion pipelines, schema harmonization, …

Best Practices For Implementing Driving Simulators In Indot Driver Training, Soowon Chang, Luciana Debs, Yanchao Zheng, Jae Heo, Yunfeng Chen, Jiansong Zhang

JTRP Technical Reports

This study supports the Indiana Department of Transportation’s (INDOT) initiative to enhance driver training through the strategic use of driving simulators. Traditional driving training methods are limited by seasonal variability and safety concerns. To address this, this project evaluated the role of simulators in improving driver preparedness, safety, and training efficiency. A comprehensive mixed-methods approach was used, including literature review, surveys, focus groups, performance data analysis, and case studies. Findings indicate that simulators are well-received, especially by novice drivers, enhancing confidence, decision-making, and situational awareness, particularly for snowplow operations. Realistic scenarios and structured debriefs using simulator-generated data were key to …

Eggplant Cultivar Demonstration Results For West-Central Indiana, 2025, Petrus Langenhoven, Alexandria Catherine Snabes

Midwest Vegetable Trial Reports

An eggplant cultivar demonstration at Purdue University's Meigs Horticulture Facility evaluated ten cultivars during the 2025 growing season to support evidence-based variety selection for Indiana growers. Eggplant production in Indiana totaled 34 acres in 2022, representing part of a national industry where 88.9% of 7,261 operations cultivate less than one acre. This demonstration provided performance data under Indiana conditions while offering hands-on learning for horticulture students. Results inform cultivar recommendations for small to medium-scale Midwest producers supplying diverse markets, including restaurants, farmers' markets, and ethnic food retailers seeking this Solanaceae crop for Asian, Mediterranean, and Middle Eastern cuisines.

Student Perceptions Of Campus-Integrated Therapy Dogs: Best Practices And Impact On Well-Being And Campus Belonging, Laura Poleshuck, Olivia Griffin, Caroline Winiecki

People and Animals: The International Journal of Research and Practice

College/university students are revealing concerning levels of anxiety and depression, as well as extremely high levels of loneliness, which interfere with their success in higher education (ACHA, 2022). A plethora of research has demonstrated that animal-assisted intervention (AAI) provided through interaction with trained therapy dogs has a positive effect on student well-being (e.g., Crossman et al., 2015; Grajfoner et al., 2017; Ward-Griffin et al., 2018). The InterProfessional Animal-assisted Wellness (IPAW) Collaborative, a campus-integrated therapy dog program with postsecondary students on a university campus, is a novel approach to AAI. The campus-integrated therapy dog program described in this study incorporates Pet …