Digital Commons Network^™

Momentary Energy Levels In Healthcare Professionals Working With Facility Dogs, Shania Sinha, Clare Jensen, Marguerite O'Haire

Discovery Undergraduate Interdisciplinary Research Internship

Past research has shown that pediatric healthcare professionals working with full-time therapy dogs (facility dogs) reported less work-related burnout and better mental health overall. However, specific in-the-moment effects of facility dogs on healthcare professionals have yet to be examined. The purpose of this study was to use Ecological Momentary Assessment (EMA) to assess the effects of facility dog presence on momentary energy levels of pediatric healthcare professionals. EMA data for the present study were collected from 122 healthcare professionals working in pediatric hospitals. Within the sample, participants working with a facility dog (handlers; n=61) were …

Annual Impact Report 2022: A Report By The Impact Evaluation Team, Impact Management Team, Impact Assessment Team

IMPACT Reports

This is the 2022 annual report of Instruction Matters: Purdue Academic Course Transformation (IMPACT). IMPACT was created in 2010, and is a large collaborative initiative on the Purdue West Lafayette campus involving multiple key partners across campus including the Office of the Provost, Center for Instructional Excellence (CIE), Purdue Online (PO), Purdue Libraries and School of Information Studies (Libraries), the Evaluation and Learning Research Center (ELRC), and Institutional Data Analytics and Assessment (IDA+A). IMPACT works with instructors to redesign large enrollment, foundational courses with the aim of engaging students more fully in their learning and creating a more student-centered environment, …

Password Managers: Secure Passwords The Easy Way, Alexander Master

CERIAS Technical Reports

Poor passwords are often the central problem identified when data breaches, ransomware attacks, and identity fraud cases occur. This Purdue Extension publication provides everyday users of Internet websites and computer systems with tools and strategies to protect their online accounts. Securing information access with password managers can be convenient and often free of cost, on a variety of devices and platforms. “Do’s and Don’ts” of password practices are highlighted, as well as the benefits of multi-factor authentication. The content is especially applicable for small businesses or non-profits, where employees often share access to systems or accounts.

Beyond Transactional Narratives Of Agency: Peer Consultants’ Antiracist Professionalization, Amy T. Cicchino, Katharine H. Brown, Christopher Basgier, Megan Haskins

The Writing Center Journal

Social justice movements, especially Black Lives Matter, inspired many writing center administrators to reflect on their commitments to antiracism and engage with antiracist professional development with their staff. However, there is continued need to study the impact antiracist professional development has on writing center consultants’ ability to practice antiracism in sessions. This article presents a predominantly white institution (PWI) writing center’s attempt to do this work, with a particular emphasis on how antiracist professional development complicates portrayals of consultant agency within the writing center. The study analyzes qualitative data collected from consultants’ reflective writing, survey, and interview responses. Results illustrate …

Writing Centers, Enclaves, And Creating Spaces Of Change Within Universities, Bronwyn T. Williams

The Writing Center Journal

Writing center scholarship often highlights the ways in which their distinctive, less directive, nongraded, and individualized instruction can make them distinctive social and pedagogical spaces. There is a simultaneous argument, however, that writing centers are often institutionally vulnerable and may be unable to engage in or promote such differences within the larger college or university. Yet, despite their size and possible vulnerability, the daily practices and institutional positioning of writing centers can help change conversations and work toward a different vision, political approach, and institutional presence. Drawing on Victor Friedman’s concept of “enclaves of different practice” and Brian Massumi’s theories …

Environmentally Tuning Asphalt Pavements Using Phase Change Materials, Miguel A. Montoya, Daniela Betancourt-Jiminez, Mohammad Notani, Reyhaneh Rahbar-Rastegar, Jeffrey P. Youngblood, Carlos J. Martinez, John E. Haddock

JTRP Technical Reports

Environmental conditions are considered an important factor influencing asphalt pavement performance. The addition of modifiers, both to the asphalt binder and the asphalt mixture, has attracted considerable attention in potentially alleviating environmentally induced pavement performance issues. Although many solutions have been developed, and some deployed, many asphalt pavements continue to prematurely fail due to environmental loading. The research reported herein investigates the synthetization and characterization of biobased Phase Change Materials (PCMs) and inclusion of Microencapsulated PCM (μPCM) in asphalt binders and mixtures to help reduce environmental damage to asphalt pavements. In general, PCM substances are formulated to absorb and release …

Heavy Fleet And Facilities Optimization, Ananth V. Iyer, Samuel Labi, Steven R. Dunlop, Dutt J. Thakkar, Sayak Mishra, Lavanya Krishna Kumar, Runjia Du, Miheeth Gala, Apoorva Banerjee, Gokul Siddharthan

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) is responsible for timely clearance of snow on state-maintained highways in Indiana as part of its wintertime operations. For this and other maintenance purposes, the state’s subdistricts maintain 101 administrative units spread throughout the state. These units are staffed by personnel, including snow truck drivers and house snow removal trucks and other equipment. INDOT indicated a need to carry out value engineering analysis of the replacement timing of the truck fleet. To address these questions, this study carried out analysis to ascertain the appropriate truck replacement age, that is different across each of the …

Forecasting Freight Logistic Needs And Indot Plans, Ananth V. Iyer, Thomas Brady, Steven R. Dunlop, Dutt J. Thakkar, Saichandar Naini, Srinath Jayan, Suraj Vasu, Sanjayraj Mohanraj, Janani Srinvasan

JTRP Technical Reports

This project focused on forecasting freight logistics needs and developing and analyzing capacity plans for INDOT to consider. The forecast timeframe ranges from the 2020 to 2045; the commodities considered are those used in the FHWA framework. We considered five SSP (Shared Socio-Economic Pathways) scenarios that are in sync with those used by the IPCC (International Protocol for Climate Change). We also use the IPCC forecasts of world GDP and FHWA forecasts to develop county-level freight forecasts by commodity. A survey of industry participants, primarily in manufacturing, suggests that Indiana industries are tied to the rest of the country and …

Integration Of Lane-Specific Traffic Data Generated From Real-Time Cctv Videos Into Indot's Traffic Management System, Stanley Chien, Lauren Christopher, Yaobin Chen, Mei Qiu, Wei Lin

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) uses about 600 digital cameras along populated Indiana highways in order to monitor highway traffic conditions. The videos from these cameras are currently observed by human operators looking for traffic conditions and incidents. However, it is time-consuming for the operators to scan through all video data from all the cameras in real-time. The main objective of this research was to develop an automatic and real-time system and implement the system at INDOT to monitor traffic conditions and detect incidents automatically. The Transportation and Autonomous Systems Institute (TASI) of the Purdue School of Engineering and …

Demonstration Project For Asphalt Performance Engineered Mixture Design Testing, Reyhaneh Rahbar-Rastegar, Gerald Huber, Miguel A. Montoya, Christopher Campbell, John E. Haddock

JTRP Technical Reports

The asphalt industry is moving towards performance-based methods for asphalt mixture design. The Federal Highway Administration (FHWA) is supportive of state departments of transportations (DOT) adopting index and predictive performance tests, especially those making use of the Asphalt Mixture Performance Tester (AMPT). The FHWA is therefore encouraging state DOTs to gain experience with the requirements of the procedures and analysis tools for Balanced Mixture Design (BMD). The main objective of this study is to evaluate fatigue cracking on three INDOT mainline pavement projects that have asphalt mixtures designed by the Superpave 5 mixture design, and to better understand the fundamental …

Integration Of Probe Data Tools Into Tmc Operations, Jijo K. Mathew, Howell Li, Jairaj Desai, Rahul Suryakant Sakhare, Enrique Saldivar-Carranza, Margaret Hunter, Benjamin Scholer, Darcy M. Bullock

JTRP Technical Reports

With the advent of probe data, there is a need to virtualize many of the Traffic Management Center (TMC) tools used for analyzing work zones, severe crashes, winter operations, moving maintenance operations, and providing dashboards characterizing overall system mobility. Traditional tools have evolved over the past several years and it is important to develop training materials and make them more accessible to a broad range of Indiana Department of Transportation (INDOT) users and other stakeholder. Over the past several years, agencies have used probe data, mainly 1-minute aggregated segment-based probe data to assess and manage roadways. This study extended traditional …

Road Condition Detection And Classification From Existing Cctv Feed, Stanley Chien, Yaobin Chen, Lauren Christopher, Mei Qiu, Zhengming Ding

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) has approximately 500 digital cameras along highways in populated areas of Indiana. These cameras are used to monitor traffic conditions around the clock, all year round. Currently, the videos from these cameras are observed one-by-one by human operators looking for traffic conditions and incidents. The main objective of this research was to develop an automatic, real-time system to monitor traffic conditions and detect incidents automatically.

The Transportation and Autonomous Systems Institute (TASI) of the Purdue School of Engineering and Technology at Indiana University-Purdue University Indianapolis (IUPUI) and the Traffic Management Center of INDOT developed …

Implementation Study: Continuous, Wireless Data Collection And Monitoring Of The Sagamore Parkway Bridge, Rameez Ali Raja, Mustafa Kilic, Monica Prezzi, Rodrigo Salgado, Fei Han

JTRP Technical Reports

This report presents, in detail, the development and implementation of a wireless solar powered DAQ system for continuous real-time monitoring of the Sagamore Parkway Bridge using the data collected from strain gauges installed in the bridge pier and its foundation piles. The data analysis showed that there is no significant change in the load-settlement response of the bridge pier 3 years after its construction. The pile cap contribution in carrying the total load carried by the bridge pier is significant (about 20%). The hourly ambient temperature trends match with the incremental bending moments measured on the bridge pier and the …

Superabsorbent Polymers For Internally Cured Concrete, Caitlin J. Adams, Baishakhi Bose, Ethan Mann, Kendra A. Erk, Ali Behnood, Alberto Castillo, Fabian B. Rodriguez, Yu Wang, Jan Olek

JTRP Technical Reports

Two commercial superabsorbent polymer (SAP) formulations were used to internally cure cement pastes, mortars, and concretes with a range of water-to-cement ratios (w/c 0.35–0.52). The following properties were determined as a function of cement chemistry and type, use of chemical admixtures, use of slag, and batching parameters: SAP absorption capacity, fresh mixture workability and consistency, degree of hydration, volumetric stability, cracking tendency, compressive and flexural strength, and pumpability. SAP internal curing agents resulted in cementitious mixtures with improved hydration, accelerated strength gain, greater volumetric stability, and improved cracking resistance while maintaining sufficient workability to be pumped and placed without sacrificing …

Improved Reliability Of Fwd Test Results And Correlations With Resilient Modulus, Kanika Gupta, Sung Soo Park, Antonio Bobet, Tommy Nantung

JTRP Technical Reports

Resilient modulus (M_R) is a key factor in the Mechanistic Empirical Pavement Design Guide (MEPDG) which was adopted by INDOT in January 2009. The resilient modulus can be determined in new pavement projects from subgrade soil samples collected at the site. However, for a pavement rehabilitation project, it becomes difficult to obtain soil information, and coring for samples may not be feasible because of traffic. The literature is rich with correlations between the M_R of the subgrade obtained in the laboratory with that estimated from FWD tests in the field. However, the review conducted shows very contradictory …

A Strategic Assessment Of Needs And Opportunities For The Wider Adoption Of Electric Vehicles In Indiana, Theodora Konstantinou, Donghui Chen, Konstantinos Flaris, Kyubyung Kang, Dan Daehyun Koo, Jonathon Sinton, Konstantina Gkritza, Samuel Labi

JTRP Technical Reports

The primary objective of this study was to assess the challenges and opportunities associated with the provision of appropriate infrastructure to support electric vehicle (EV) operations and electrification across Indiana. A secondary objective of this study was to develop a strategic plan for INDOT that outlines new business opportunities for developing EV charging stations. To achieve these objectives, the project team assessed current and emerging trends in EV operations, particularly EV charging infrastructure and EV demand forecasting. They also examined opportunities for the strategic deployment of EV charging stations by identifying EV infrastructure deficit areas; investigated the impact of EV …

Synthesis Study: Repair And Durability Of Fire-Damaged Prestressed Concrete Bridge Girders, Tzu-Chun Tseng, Amit H. Varma

JTRP Technical Reports

Recent research results from INDOT research project SPR-4221 indicate that the damage to prestressed concrete bridge girders from an intense hydrocarbon fire is limited to concrete material degradation up to a depth of 1 inch from the surface. Additionally, concrete cracking and spalling occur in the fire-damaged region, but the structural strength (flexure and shear) of fire-exposed prestressed concrete bridge girders is not compromised. The findings open the possibility for repairing damaged bridge girders and answers questions regarding the durability of damaged-unrepaired and damaged-repaired girders.

Safety And Mobility Analysis Of Rolling Slowdown For Work Zones: Comparison With Full Closure, Abdullah Jalal Nafakh, Franklin Vargas Davila, Yunchang Zhang, John D. Fricker, Dulcy M. Abraham

JTRP Technical Reports

There are times when the traffic lanes through a work zone must be kept clear for activities such as placing overhead beams, erecting overhead signs, and installing power lines, and other temporary roadway work activities. As an alternative to a full road closure, a rolling slowdown can typically provide up to 30 minutes to complete such activities without bringing approaching traffic to a complete halt. Using data from recent rolling slowdowns and full closures carried on the Indiana interstate network and a simulation approach, this study compares rolling slowdowns to full closures from safety and mobility standpoints. The study suggests …

Development Of In-Situ Sensing Method For The Monitoring Of Water-Cement (W/C) Values And The Effectiveness Of Curing Concrete, Rui He, Na (Luna) Lu, Jan Olek

JTRP Technical Reports

As the most widely used construction material, concrete is very durable and can provide long service life without extensive maintenance. The strength and durability of concrete are primarily influenced by the initial water-cement ratio value (w/c), and the curing condition during the hardening process also influences its performance. The w/c value is defined as the total mass of free water that can be consumed by hydration divided by the total mass of cement and any additional pozzolanic material such as fly ash, slag, silica fume. Once placed, field concrete pavements are routinely cured with liquid membrane-forming compounds. For laboratory study, …

Real Life Experience With Major Pavement Types, Ayesha Shah, Jan Olek, Rebecca S. Mcdaniel

JTRP Technical Reports

Pavement performance is a complex issue which depends on many contributing factors. Examining the performance of real-life pavements across the state determines what the actual service lives are for the pavements. For the purposes of this study, only selected LTPP projects were examined, along with a database containing all the historic repair projects completed in Indiana. Pertinent information present in the Indiana Historic Contracts Database was extracted concerning the types of pavement repair and treatments options commonly employed within the state, the time between repairs, etc. These data were used to determine descriptive statistical parameters and was summarized in graph …

Workzone Lighting And Glare On Nighttime Construction And Maintenance Activities, Abdullah Jalal Nafakh, Franklin Vargas Davila, Yunchang Zhang, Jon D. Fricker, Dulcy M. Abraham

JTRP Technical Reports

Over the last two decades, an increasing number of highway construction and maintenance projects in the United States have been completed at night to avoid or alleviate traffic congestion delays. Working at night entails several advantages, including lower traffic volumes, less impact on local businesses, cooler temperatures for equipment and material, and fewer overall crashes. Although nighttime roadway operations may minimize traffic disruptions, there are several safety concerns about passing motorists and workers in the nighttime work zone. For instance, improper lighting arrangements or excessive lighting levels at the job site could cause harmful levels of glare for the traveling …

Estimating Strength From Stiffness For Chemically Treated Soils, Pranavkumar Shivakumar, Kanika Gupta, Antonio Bobet, Boonam Shin, Peter J. Becker

JTRP Technical Reports

The central theme of this study is to identify strength-stiffness correlations for chemically treated subgrade soils in Indiana. This was done by conducting Unconfined Compression (UC) Tests and Resilient Modulus Tests for soils collected at three different sites—US-31, SR-37, and I-65. At each site, soil samples were obtained from 11 locations at 30 ft spacing. The soils were treated in the laboratory with cement, using the same proportions used for construction, and cured for 7 and 28 days before testing. Results from the UC tests were compared with the resilient modulus results that were available. No direct correlation was found …

Synthesis Study Of Best Practices For Cleaning Tools And Paving Equipment: Asphalt Release Agents (Aras) And Asphalt Cleaners (Acs), Sogand Hasanzadeh, Mirian Velay-Lizancos, Woei-Chyi Chang, Marina Lopez-Arias, Vito Francioso

JTRP Technical Reports

Diesel has been used widely as an asphalt cleaning agent due to its effectiveness for many years. However, its negative impact on health and the environment calls for more sustainable and safe alternatives. Asphalt Release Agents (ARAs) are products for preventing or mitigating undesirable adhesion of HMA to the asphalt equipment, and Asphalt Cleaners (ACs) are products for remediation when the adhesion has already happened. In this study, commercially ARAs and ACs reported by NTPEP and U.S. DOTs are quantitatively and qualitatively examined based on the following criteria: (1) cost-effectiveness, (2) functionality, (3) environmental, and (4) safety considerations. The results …

Impacts To Traffic Behavior From Queue Warning Truck: Current Pilot Project, Rahul Suryakant Sakhare, Justin Mahlberg, Jijo K. Mathew, Jairaj Desai, Howell Li, Darcy M. Bullock

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) started deploying queue warning trucks ahead of interstate work zones to alert motorists of queued traffic. Along with visually alerting the motorists, digital alerts were integrated with navigational applications such as Apple Maps, Waze, and the in-vehicle infotainment system of Stellantis vehicles. More than 45,000 hours of alerting was provided to motorists across various interstates in Indiana over a 26-month period. This report evaluated the impact of queue warning trucks on traffic using hard braking events and traffic speeds provided by granular connected trajectory vehicle data. Evaluation of over 370 hours of queuing with …

Large Culvert Inspection Procedures: Guidelines For Indot, Scott M. Grier, Christopher S. Williams

JTRP Technical Reports

Within the state of Indiana, there are approximately 9,000 structures with unsupported span lengths that range from 4 ft to 20 ft that the Indiana Department of Transportation (INDOT) is responsible for maintaining. These structures are referred to as large culverts by INDOT. The agency recognized the need to improve culvert inspection procedures so that inspection data that is collected can provide essential information to asset engineers who make decisions regarding culvert management. The purpose of the project described in this report was to identify best practices for the inspection and management of these structures to develop guidelines that optimize …

Crawfordsville Technical Services Asset Management Workflow Improvement Project, Ted W. Boehm, Jim Handy

JTRP Technical Reports

The Indiana Department of Transportation (INDOT) is divided into six districts, with district offices located in LaPorte, Fort Wayne, Crawfordsville, Greenfield, Vincennes, and Seymour. Each district has a Technical Services Department responsible for (with support from INDOT Central Office staff) managing the INDOT assets within the district and providing technical support to the district (including capital programs, maintenance, construction projects, and others). They also provide input to Statewide Asset Management and Capital Programs. Each Technical Services Department has assigned Asset Owners responsible for management of assets such as roadways/pavement, bridges, large culverts, small culverts, traffic/safety, mobility, and (in the case …

Assessing The Travel Demand And Mobility Impacts Of Transformative Transportation Technologies In Indiana, Hao Luo, Ricardo Chahine, Arianna Rambaram, Elizabeth Theresa Rosenzweig, Konstantina Gkritza, Hua Cai

JTRP Technical Reports

The rapid development of transformative transportation technologies, such as bike-sharing, shared e-scooters, and ride-hailing systems, is reshaping the transportation landscape. These transformative transportation technologies have the potential to significantly change travel behavior and travel demand and affect transportation agencies’ planning, operations, and decision-making. The objective of this project is to develop a framework and models to quantify the potential travel demand and mobility impacts of transformative transportation technologies in Indiana cities. This project analyzed historical system usage data and conducted survey studies to evaluate the availability and use of transformative transportation technologies in select Indiana cities. The project also proposed …

Improving Scaling Resistance Of Pavement Concrete Using Titanium Dioxide (Tio2) And Nanosilica, Dan Huang, Mirian Velay-Lizancos, Jan Olek

JTRP Technical Reports

This project focused on the evaluation of the influence of nanoadditives on the hydration kinetics, mechanical properties, and durability of concretes with and without supplementary cementitious materials (SCMs). The types of nanomaterials used in the course of this study included nano-titanium dioxide (nano-TiO₂) and two forms of nanosilica. A series of experimental tasks, including fabrication, curing, and conditioning of specimens, microstructure analysis, mechanical strength testing, and durability testing were conducted in the laboratory. Based on experimental results, it can be concluded that the addition of nanoparticles can accelerate the early-age hydration process of cementitious pastes, especially those containing …

202210-03, 10/10/2022, I-65 N, Mm 258, 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.

202206-01, 06/21/2022, I-65 N, Mm 133.2, 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.