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Articles 601 - 630 of 12097
Full-Text Articles in Entire DC Network
Development Of A Safety Advisory System To Aid Senior Citizens In Gap Selection, Ping Yi
Development Of A Safety Advisory System To Aid Senior Citizens In Gap Selection, Ping Yi
Center for Connected and Automated Transportation
Older drivers tend to suffer more from aging related issues concerning hearing and vision, the reaction time, and cognitive functions. This research aims to help older drivers select proper gaps by using connected vehicles technologies and an in-vehicle advisory system. A study was conducted on 79 old drivers (60 or older), among them 75.9% were male and 24.1% were females. The study was conducted at two unsignalized intersections in the Stow and Tallmadge in Ohio, and it included both a simulation and a field test. The field data showed that a safe gap of 7.4 seconds at the Stow location …
Impact Analysis Of Roadway Surface And Vehicle Conditions On Fleet Formation For Connected And Automated Vehicles, Ping Yi, Tariq Alqubaysi
Impact Analysis Of Roadway Surface And Vehicle Conditions On Fleet Formation For Connected And Automated Vehicles, Ping Yi, Tariq Alqubaysi
Center for Connected and Automated Transportation
Taking advantage of the rapid development of vehicle control and communication technologies, many studies have suggested that operating vehicles in platoons in the future would help improve the safety and efficiency of the transportation system. Although vehicles in a platoon can share data from V2/V communication, a platoon model built on proper control laws is needed to keep the formation of the vehicle fleet and take the real advantage in platoon operations in an environment encompassing different pavement, roadway, and tire conditions. This research introduces a platoon model using a headway-based distance control policy to maintain stability and reduce errors …
Dynamics Of Nanocluster Aerosol In The Indoor Atmosphere During Gas Cooking, Satya S. Patra, Jinglin Jiang, Xiaosu Ding, Chunxu Huang, Emily K. Reidy, Vinay Kumar, Paige Price, Connor Keech, Gerhard Steiner, Philip Stevens, Nusrat Jung, Brandon E. Boor
Dynamics Of Nanocluster Aerosol In The Indoor Atmosphere During Gas Cooking, Satya S. Patra, Jinglin Jiang, Xiaosu Ding, Chunxu Huang, Emily K. Reidy, Vinay Kumar, Paige Price, Connor Keech, Gerhard Steiner, Philip Stevens, Nusrat Jung, Brandon E. Boor
Purdue University Libraries Open Access Publishing Fund
Nanocluster aerosol (NCA: particles in the size range of 1–3 nm) are a critically important, yet understudied, class of atmospheric aerosol particles. NCA efficiently deposit in the human respiratory system and can translocate to vital organs. Due to their high surface area-to-mass ratios, NCA are associated with a heightened propensity for bioactivity and toxicity. Despite the human health relevance of NCA, little is known regarding the prevalence of NCA in indoor environments where people spend the majority of their time. In this study, we quantify the formation and transformation of indoor atmospheric NCA down to 1 nm via high-resolution online …
Classification Of Human Learning Stages Via Kernel Distribution Embeddings, Madeleine Shuhn-Tsuan Yuh, Kendric Ray Ortiz, Kylie Sue Sommer-Kohrt, Meeko Oishi, Neera Jain
Classification Of Human Learning Stages Via Kernel Distribution Embeddings, Madeleine Shuhn-Tsuan Yuh, Kendric Ray Ortiz, Kylie Sue Sommer-Kohrt, Meeko Oishi, Neera Jain
School of Mechanical Engineering Faculty Publications
Adaptive automation, automation which is responsive to the human's performance via the alteration of control laws or level of assistance, is an important tool for training humans to attain new skills when operating dynamical systems. When coupled with cognitive feedback, adaptive automation has the potential to further facilitate human training, but requires precise assessments of human progression through various learning stages. This is challenging because of the underlying dynamics, as well as the stochasticity inherent to human action. We propose a data-driven approach to assess learning stages in a complex quadrotor landing task that is responsive to stochastic, human-in-the-loop quadrotor …
Granular Estimation Of User Cognitive Workload Using Multi-Modal Physiological Sensors, Jingkun Wang, Christopher Stevens, Winston Bennett, Denny Yu
Granular Estimation Of User Cognitive Workload Using Multi-Modal Physiological Sensors, Jingkun Wang, Christopher Stevens, Winston Bennett, Denny Yu
Purdue University Libraries Open Access Publishing Fund
Mental workload (MWL) is a crucial area of study due to its significant influence on task performance and potential for significant operator error. However, measuring MWL presents challenges, as it is a multi-dimensional construct. Previous research on MWL models has focused on differentiating between two to three levels. Nonetheless, tasks can vary widely in their complexity, and little is known about how subtle variations in task difficulty influence workload indicators. To address this, we conducted an experiment inducing MWL in up to 5 levels, hypothesizing that our multi-modal metrics would be able to distinguish between each MWL stage. We measured …
Nature Of Occupational Incidents Among Roofing Contractors: A Data Mining Approach, Ikechukwu Sylvester Onuchukwu, Pouya Gholizadeh, Genian Liko, Behzad Esmaeili
Nature Of Occupational Incidents Among Roofing Contractors: A Data Mining Approach, Ikechukwu Sylvester Onuchukwu, Pouya Gholizadeh, Genian Liko, Behzad Esmaeili
Purdue University Libraries Open Access Publishing Fund
Given that roofing contractors in the construction industry have the highest fatality rate among specialty contractors, understanding the root cause of incidents among roofers is critical for improving safety outcomes. This study applied frequency analysis and decision tree data-mining techniques to analyze roofers’ fatal and non-fatal accident reports. The frequency analysis yielded insights into the leading cause of accidents, with fall to a lower level (83%) being the highest, followed by incidence sources relating to structures and surfaces (56%). The most common injuries experienced by roofing contractors were fractures (49%) and concussions (15%), especially for events occurring in residential buildings, …
Dieta De La Milpa: A Culturally-Concordant Plant-Based Dietary Pattern For Hispanic/Latine People With Chronic Kidney Disease, Annabel Biruete, Gabriela Leal-Escobar, Angeles Espinosa-Cuevas, Luis Mojica, Brandon M. Kistler
Dieta De La Milpa: A Culturally-Concordant Plant-Based Dietary Pattern For Hispanic/Latine People With Chronic Kidney Disease, Annabel Biruete, Gabriela Leal-Escobar, Angeles Espinosa-Cuevas, Luis Mojica, Brandon M. Kistler
Purdue University Libraries Open Access Publishing Fund
Chronic kidney disease (CKD) disproportionately affects minorities in the United States, including the Hispanic/Latine population, and is a public health concern in Latin American countries. An emphasis on healthy dietary patterns, including the Mediterranean and the Dietary Approaches to Stop Hypertension (DASH) diets, has been suggested as they are associated with a lower incidence of CKD, slower CKD progression, and lower mortality in kidney failure. However, their applicability may be limited in people from Latin America. The Dieta de la Milpa (Diet of the Cornfield) was recently described as the dietary pattern of choice for people from Mesoamerica (Central Mexico …
Cultural, Psychosocial, And Educational Factors In Relation To Ethnic Identity Among Cambodian High School Students In The United States, Traci L. Weinstein, Khanh Dinh, Tamara Springle
Cultural, Psychosocial, And Educational Factors In Relation To Ethnic Identity Among Cambodian High School Students In The United States, Traci L. Weinstein, Khanh Dinh, Tamara Springle
Journal of Southeast Asian American Education and Advancement
This study examined the relationship between preferred ethnic labels an cultural, psychosocial, and academic variables in a sample of 174 Cambodian high school students in the U.S. Results indicated that participants who chose “American” ethnic labels reported higher scores on White/Anglo orientation and on English language usage and fluency, whereas participants who chose the “Cambodian” ethnic label reported more Khmer language usage and frequency. Students who chose the combined “Cambodian American” ethnic label reported stronger beliefs in the utility of education and higher academic aspirations. The findings from this study expand the research on ethnic identity by focusing on 2nd …
Teaching And Learning In Stem With Computation, Modeling, And Simulation Practices, Alejandra J. Magana
Teaching And Learning In Stem With Computation, Modeling, And Simulation Practices, Alejandra J. Magana
Purdue University Press Books
Computation, modeling, and simulation practices are commonplace in the STEM workplace, yet formal training embedded in disciplinary practices is not as standard in the undergraduate classroom. Teaching and Learning in STEM With Computation, Modeling, and Simulation Practices: A Guide for Practitioners and Researchers gives instructors a handbook to ensure their curriculum bridges the gap between the classroom and workplace by equipping students with computational skills and preparing them for a rewarding career in STEM. Grounded in theory and supported by fifteen years of education research at the undergraduate level, this book provides instructional, pedagogical, and assessment guidance for integrating modeling …
Animal Assisted Play Therapy® For Childhood Animal Abuse Following Exposure To Family Violence: A Case Example, Katharine Wenocur, Rise Vanfleet
Animal Assisted Play Therapy® For Childhood Animal Abuse Following Exposure To Family Violence: A Case Example, Katharine Wenocur, Rise Vanfleet
People and Animals: The International Journal of Research and Practice
Intentional harm to nonhuman animals in childhood often correlates with histories of witnessing, experiencing, or perpetrating violence. Without appropriate intervention, children and adolescents who abuse animals following exposure to family violence risk long-term behavioral health challenges. While some treatment models have been specifically designed to reduce the risk of future violence among children displaying this behavior, interventions involving nonhuman animals represent a novel approach and show promise in addressing behavioral challenges associated with this behavior. Framed through the lens of a clinical case study, this article presents the potential benefits of implementing Animal Assisted Play Therapy® to treat symptoms of …
“Here, Kitty, Kitty.” Community Perceptions Of Free-Roaming Cats: A Northern Canadian Case Study, Annie Booth, Ken Otter
“Here, Kitty, Kitty.” Community Perceptions Of Free-Roaming Cats: A Northern Canadian Case Study, Annie Booth, Ken Otter
People and Animals: The International Journal of Research and Practice
Free-roaming domestic cats (Felis catus) create controversy, due to their tendency to invade neighbors’ gardens, hunt wildlife, and create disturbances. Municipal governments are often under pressure to address concerns regarding free-roaming cats. As approximately 28% of the 8.8 million cats owned in Canada free-roam (are allowed outside unsupervised and unconstrained), understanding owner rationales for letting the cat out is important for officials tasked with addressing public concerns. In 2019, we studied attitudes toward cats within a north-central British Columbia, Canada, city. The rationales cat owners use to justify free-roaming, as well as their perceptions about the risks and …
Sampling-Accelerated Prediction Of Phonon Scattering Rates For Converged Thermal Conductivity And Radiative Properties, Ziqi Guo, Zherui Han, Dudong Feng, Guang Lin, Xiulin Ruan
Sampling-Accelerated Prediction Of Phonon Scattering Rates For Converged Thermal Conductivity And Radiative Properties, Ziqi Guo, Zherui Han, Dudong Feng, Guang Lin, Xiulin Ruan
Purdue University Libraries Open Access Publishing Fund
The prediction of thermal conductivity and radiative properties is crucial. However, computing phonon scattering, especially for four-phonon scattering, could be prohibitively expensive, and the thermal conductivity for silicon after considering four-phonon scattering is significantly under-predicted and not converged in the literature. Here we propose a method to estimate scattering rates from a small sample of scattering processes using maximum likelihood estimation. The calculation of scattering rates and associated thermal conductivity and radiative properties are dramatically accelerated by three to four orders of magnitude. This allows us to use an unprecedented q-mesh (discretized grid in the reciprocal space) of 32 × …
Apparatus And Methodology For Smart Trainer Homologation Analysis, Teal Dowd, Diana Heflin, Justin Miller, Michael Rogers, Andrei Krasilnikau, Jan-Anders Mansson
Apparatus And Methodology For Smart Trainer Homologation Analysis, Teal Dowd, Diana Heflin, Justin Miller, Michael Rogers, Andrei Krasilnikau, Jan-Anders Mansson
School of Materials Engineering Faculty Publications
Virtual cycling engagement has seen a significant increase in the last decade, with a recognizable surge in 2020 due to the pandemic. To ensure a fair competition field, a testing apparatus was designed to test direct-drive bicycle smart trainers from various manufacturers. Smart trainers were tested for error on two main metrics: power measurement error and resistance error. Given that the integrity of virtual racing relies upon accurate power readings sent from the smart trainer to a cloud based competition software, discrepancies in these metrics are most likely to affect the outcome of an event. The testing apparatus used a …
Expanding Landscapes: Intersections Between Writing Center Work And Other Academic Fields, Vicki R. Kennell, Maria Eloisa (Lisa) Nuguid, Vanessa Pruitt, Ashley Garla
Expanding Landscapes: Intersections Between Writing Center Work And Other Academic Fields, Vicki R. Kennell, Maria Eloisa (Lisa) Nuguid, Vanessa Pruitt, Ashley Garla
Purdue Writing Lab/Purdue OWL Presentations
This presentation explores the intersections between writing center work and math education, counseling psychology, and speech/hearing sciences. The four fields share more similarities than first expected, such as prioritizing relational approaches and maintaining client agency. Implications for writing centers include the need to adjust consultant education to overtly explore such overlaps in order to increase new consultants’ confidence and circumvent potential problems caused by differing assumptions.
Digitizing Delphi: Educating Audiences Through Virtual Reconstruction, Kate Koury
Digitizing Delphi: Educating Audiences Through Virtual Reconstruction, Kate Koury
The Journal of Purdue Undergraduate Research
Implementing a 3D model into a virtual space allows the general public to engage critically with archaeological processes. There are many unseen decisions that go into reconstructing an ancient temple. Analysis of available materials and techniques, predictions of how objects were used, decisions of what sources to reference, puzzle piecing broken remains together, and even educated guesses used to fill gaps in information often go unobserved by the public. This work will educate users about those choices by allowing the side-by-side comparison of conflicting theories on the reconstruction of the Tholos at Delphi, which is an ideal site because of …
Smartphone Color Error Analysis, Mackenna Hawes
Smartphone Color Error Analysis, Mackenna Hawes
The Journal of Purdue Undergraduate Research
No abstract provided.
A Computational Profile Of Invasive Lionfish In Belize: A New Insight On A Destructive Species, Joshua E. Balan
A Computational Profile Of Invasive Lionfish In Belize: A New Insight On A Destructive Species, Joshua E. Balan
The Journal of Purdue Undergraduate Research
Since their discovery in the region in 2009, invasive Indonesian-native lionfish have been taking over the Belize Barrier Reef. As a result, populations of local species have dwindled as they are either eaten or outcompeted by the invaders. This has led to devastating losses ecologically and economically; massive industries in the local nations, such as fisheries and tourism, have suffered greatly. Attempting to combat this, local organizations, from nonprofits to ecotourism companies, have been manually spear-hunting them on scuba dives to cull the population. One such company, Reef Conservation Institute (ReefCI), operating out of Tom Owens Caye outside of Placencia, …
Front Matter
The Writing Center Journal
Front matter and editors' introduction to The Writing Center Journal 41:3 (2023).
Effectively Affective: Examining The Ethos Of One Hbcu Writing Center, Karen Keaton Jackson, Amara Hand
Effectively Affective: Examining The Ethos Of One Hbcu Writing Center, Karen Keaton Jackson, Amara Hand
The Writing Center Journal
Over the past several decades, writing center scholarship has evolved to include multiple theories and pedagogies that led to widely used best practices. As is the case in many disciplines, often writing centers at large, research PWIs are most often cited and highlighted within the scholarship. While many of those readings do offer helpful strategies for working with students at all levels, often they do not account for the unique contexts and diverse student populations that make up many HBCUs. As a result, more research from a variety of writing centers is needed so practitioners see there are multiple ways …
Asynchronous And Rhetorical: Appointment Forms And Their Effect On Writer-Consultant Exchanges, Lizzie Hutton, Kate Francis, Danielle Hart, Anita Long, Brenda Tyrrell
Asynchronous And Rhetorical: Appointment Forms And Their Effect On Writer-Consultant Exchanges, Lizzie Hutton, Kate Francis, Danielle Hart, Anita Long, Brenda Tyrrell
The Writing Center Journal
Especially in the wake of the recent pandemic, asynchronous consulting has become increasingly central to writing center work. Yet writing center scholarship has little attended to the significant impact writer input can have on asynchronous writer-consultant exchanges. Drawing on asynchronous consultation data collected before and after our 2019 redesign of our writing center’s asynchronous system, this comparative study examines the specific effect of the writer appointment form on the nature of both writers’ requests for feedback (RFFs) and consultants’ resulting comments. Our findings suggest that differently designed appointments forms can scaffold significantly different kinds of asynchronous writer-consultant exchanges, especially visible …
Writing Centers And Neocolonialism: How Writing Centers Are Being Commodified And Exported As U.S. Neocolonial Tools, Brian Hotson, Stevie Bell
Writing Centers And Neocolonialism: How Writing Centers Are Being Commodified And Exported As U.S. Neocolonial Tools, Brian Hotson, Stevie Bell
The Writing Center Journal
In this paper, we explore the complicity of writing centers in the Global North in global neocolonialism despite its resounding rejection within Western writing center scholarship, in which Romeo García contends that writing tutors can be “decolonial agents.” We show that higher education is used by governments in the Global North as a neocolonial tool and situate international U.S. writing center initiatives within this context. Writing centers have remained complicit in global neocolonialism involving the commodification and exportation of American English as well as Western-style institutions, curricula, and pedagogies. This is most explicit in recent writing center initiatives undertaken by …
Review: Unwell Writing Centers: Searching For Wellness In Neoliberal Educational Institutions And Beyond, Aurora Matzke
Review: Unwell Writing Centers: Searching For Wellness In Neoliberal Educational Institutions And Beyond, Aurora Matzke
The Writing Center Journal
“Unwell Writing Centers: Searching for Wellness in Neoliberal Educational Institutions and Beyond” blends narrative, mixed methods research, and rhetorical analysis to make a case for the possibilities inherent in homegrown wellness practices that are “communal, political, and rooted in defiance of white supremacy.”
Impact Of Weather Factors On Airport Arrival Rates: Application Of Machine Learning In Air Transportation, Robert W. Maxson, Dothang Truong, Woojin Choi
Impact Of Weather Factors On Airport Arrival Rates: Application Of Machine Learning In Air Transportation, Robert W. Maxson, Dothang Truong, Woojin Choi
Journal of Aviation Technology and Engineering
Weather is responsible for approximately 70% of air transportation delays in the National Airspace System, and delays resulting from convective weather alone cost airlines and passengers millions of dollars each year due to delays that could be avoided. This research sought to establish relationships between environmental variables and airport efficiency estimates by data mining archived weather and airport performance data at ten geographically and climatologically different airports. Several meaningful relationships were discovered from six out of ten airports using various machine learning methods within an overarching data mining protocol, and the developed models were tested using historical data.
Nsf Collaborative Research: Developing Business Communication Skills In Manufacturing Technician Education, Andrew Bell, David Blais, April Bledsoe, James Freygang, Caleb Hale, Jon Hineman, Garrett Middleton, Robert Parker, Jessica Ramos
Nsf Collaborative Research: Developing Business Communication Skills In Manufacturing Technician Education, Andrew Bell, David Blais, April Bledsoe, James Freygang, Caleb Hale, Jon Hineman, Garrett Middleton, Robert Parker, Jessica Ramos
NSF ATE Project Case Study Collection
No abstract provided.
Origin-Destination Vehicle Counts In Weaving Area Utilizing Existing Field Data, Stanley Chien, Lauren Christopher, Yaobin Chen, Mei Qiu, Wei Lin
Origin-Destination Vehicle Counts In Weaving Area Utilizing Existing Field Data, Stanley Chien, Lauren Christopher, Yaobin Chen, Mei Qiu, Wei Lin
JTRP Technical Reports
Vehicle weaving describes the vehicle lane changes in areas between consecutive merge and diverge ramp junctions. During heavy traffic, vehicle weaving will slow down traffic, cause congestion, and increase the possibility of crashes. It is desirable to automatically capture the weaving information using camera videos in the weaving areas. The currently existing weaving area analysis is very tedious and labor-intensive. This report describes a novel system that uses the videos simultaneously captured at the entry and exit of the weaving area to find the number and percentage of vehicles from each lane on the entry to each lane on the …
Indot Project Change Orders: Root Causes And Recommendations, Suyash Padhye, Aishwarya Sharma, Hesam Arefkhani, Deepak Benny, Konstantina Gkritza, Samuel Labi, Makarand Hastak
Indot Project Change Orders: Root Causes And Recommendations, Suyash Padhye, Aishwarya Sharma, Hesam Arefkhani, Deepak Benny, Konstantina Gkritza, Samuel Labi, Makarand Hastak
JTRP Technical Reports
This study analyzed the historical trends in change orders (COs) associated with the Indiana Department of Transportation (INDOT) highway contracts. It also investigated correlations between COs and base factors (district, project type, contract type, award amount, geographical area (rural vs. urban)), and sought to understand the effect of the root causes but not to predict CO based on root causes. Unlike the base factors, the root causes are unknown prior to construction. The study developed models that forecasted CO characteristics—CO likelihood, CO frequency (count), and CO severity (magnitude) and CO impacts (cost overrun and schedule delay). To address these research …
Anomaly Detection In Traffic Patterns Using The Indot Camera System, Lauren Christopher, Stanley Chien, Yaobin Chen, Mei Qiu, William Reindl, Liya Koshy
Anomaly Detection In Traffic Patterns Using The Indot Camera System, Lauren Christopher, Stanley Chien, Yaobin Chen, Mei Qiu, William Reindl, Liya Koshy
JTRP Technical Reports
The Transportation and Autonomous Systems Institute (TASI) of Purdue University Indianapolis (PUI) and the INDOT Traffic Management Center worked together to develop a system that monitors traffic conditions using INDOT CCTV video feeds. Computer vision-based traffic anomaly detection has been studied for the past 20 years, and a thorough state-of-the-art analysis was produced in a recent survey paper. Although AI has contributed to improving anomaly detection, several major challenges remain, such as tracking errors, illumination, weather, occlusion handling, camera pose, and perspective. In addition, the lack of real-life datasets makes the effectiveness of anomaly detection techniques unclear. This project builds …
Review Of Indiana Asphalt Binders (In-Situ Pg Grade Asphalt Determination), Jusang Lee, M. Reza Pouranian, Mohammed Ziaur Rahaman, Ayesha Shah, John E. Haddock
Review Of Indiana Asphalt Binders (In-Situ Pg Grade Asphalt Determination), Jusang Lee, M. Reza Pouranian, Mohammed Ziaur Rahaman, Ayesha Shah, John E. Haddock
JTRP Technical Reports
In the face of multifaceted challenges such as asphalt pavement deterioration and the introduction of new LTPPBind versions, the Indiana Department of Transportation (INDOT) initiated a pivotal research project focusing on three primary areas. First, the study examined the implications of Performance Grade (PG) binder selections on pavement performance using AASHTOware Pavement Mechanistic-Empirical (ME) Design V 2.6. It revealed that PG selections, particularly those made by LTPPBind V 3.1 Desktop and Online, significantly influenced pavement performance, impacting thermal and bottom-up cracking. Second, the project explored the efficacy of three solvents— n-propyl bromide (nPB), trichloroethylene (TCE), and a solution of toluene/ethanol …
Field Implementation Of Concrete Strength Sensor To Determine Optimal Traffic Opening Time, Zhihao Kong, Na Lu
Field Implementation Of Concrete Strength Sensor To Determine Optimal Traffic Opening Time, Zhihao Kong, Na Lu
JTRP Technical Reports
In the fast-paced and time-sensitive fields of construction and concrete production, real-time monitoring of concrete strength is crucial. Traditional testing methods, such as hydraulic compression (ASTM C 39) and maturity methods (ASTM C 1074), are often laborious and challenging to implement on-site. Building on prior research (SPR 4210 and SPR 4513), we have advanced the electromechanical impedance (EMI) technique for in-situ concrete strength monitoring, crucial for determining safe traffic opening times. These projects have made significant strides in technology, including the development of an IoT-based hardware system for wireless data collection and a cloud-based platform for efficient data processing. A …
Performance-Related Specifications For Pavement Milling, Oscar Andrés Moncada, Seonghwan Cho, Vito Francioso, John E. Haddock
Performance-Related Specifications For Pavement Milling, Oscar Andrés Moncada, Seonghwan Cho, Vito Francioso, John E. Haddock
JTRP Technical Reports
The primary objective of this research was to evaluate pavement damage that may occur during the pavement milling process, which is critical to the overlay design and performance of asphalt pavements. To achieve this purpose, the most common milling practices in Indiana were implemented on several trial sections and various damage characterization tests performed in the field and laboratory. The research provided a testing methodology to determine if a milling machine was having detrimental effects on the residual pavement and a process to “tune” the particular milling machine to its optimal operational standards to minimize detrimental effects. Finally, this research …