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Articles 1261 - 1290 of 18497
Full-Text Articles in Entire DC Network
Discursive Practices In Recurring Asynchronous Writing Center Consultations, Olalekan T. Adepoju
Discursive Practices In Recurring Asynchronous Writing Center Consultations, Olalekan T. Adepoju
The Writing Center Journal
This study explores the discursive practices the researcher utilizes during recurring asynchronous writing consultations to engender mutually adjusted and context-driven interactions meaningful to writers’ development during virtual tutoring. While earlier studies have critiqued asynchronous tutoring for its inability to efficiently promote the writing center philosophy, the inevitability of writing centers’ transition to online modes due to the global COVID-19 pandemic warrants that writing center scholarship rethink the effectiveness of these online spaces. This study utilizes a discourse-analytic approach to analyze textual data collected from both WCONLINE and drafts I, the tutor, worked on. Individual interviews are also collected to ascertain …
Measuring And Visualizing Freeway Traffic Conditions: Using Connected Vehicle Data, Rahul Suryakant Sakhare, Jairaj Desai, Jijo K. Mathew, John Mcgregor, Mischa Kachler, Darcy M. Bullock
Measuring And Visualizing Freeway Traffic Conditions: Using Connected Vehicle Data, Rahul Suryakant Sakhare, Jairaj Desai, Jijo K. Mathew, John Mcgregor, Mischa Kachler, Darcy M. Bullock
JTRP Affiliated Reports
Historically, a network of roadside sensors and cameras have been used to monitor freeway conditions. Although these systems are effective, they are typically not operational in and around work zones. Furthermore, it is often not financially viable to deploy in-road sensors and cameras in rural areas. Connected vehicle trajectory data has emerged as a viable source of data and provides a unique opportunity for monitoring freeways. This monograph describes how these connected vehicles can be used to directly measure queue lengths and travel times and this description is summarized in a graphical format easily used by agencies to make management …
Collaborative Publishing And Multivalent Research: Writing Center Journal Scholarship From 2001 To 2020, Joseph Cheatle
Collaborative Publishing And Multivalent Research: Writing Center Journal Scholarship From 2001 To 2020, Joseph Cheatle
The Writing Center Journal
This work examines articles published in the Writing Center Journal between 2001 and 2020 in order to understand more about the publishing, scholarship, and research practices of the field of writing center studies. Through analyzing articles published in the Writing Center Journal between 2001 and 2020, this work makes three contributions to the field. The first contribution of this work is an overview of the shift from scholarship to research in the field of writing center studies. The second contribution of this work is to highlight the growth of collaborative scholarship and research during this time. As is demonstrated in …
“Hopes And Fears”: What Do Writing Center Administrators Think Of Merging With Or Converting Into A Learning Center?, Jenny Goransson
“Hopes And Fears”: What Do Writing Center Administrators Think Of Merging With Or Converting Into A Learning Center?, Jenny Goransson
The Writing Center Journal
This article shares findings from a survey study (n = 73) focused on writing center administrator (WCA) perceptions of two phenomena we see on many secondary and postsecondary campuses in recent years: writing centers expanding to become learning centers, and writing centers consolidating or merging with other tutoring services on campus. Through analysis of the qualitative, open-ended survey responses, the study revealed that WCAs’ views of these trends are greatly impacted by local conditions and levels of autonomy, as well as WCAs’ beliefs about expertise. Also, consolidation and expansion are seen by WCAs as shifting writing center identity in …
Review: A Working Model For Contingent Faculty, Courtney L. Werner
Review: A Working Model For Contingent Faculty, Courtney L. Werner
The Writing Center Journal
In his book A Working Model for Contingent Faculty, Robert Samuels presents multiple ideas for helping contingent faculty organize to gain equity on campus: in their careers, working conditions, and pay. Samuels critiques current prominent, negative discourse on contingent faculty, offering instead ways to emphasize contingent faculty’s diverse and positive experiences and opportunities. I offer additional insights spurred from Samuels’s ideas, including connecting with student government and finding ways to make writing center work and research more public and apparent to institutional stakeholders (e.g., students, faculty, donors, administrators, boards/trustees).
Lessening Density Requirement And Adjusting Density Pay Factors For Asphalt Pavements In Poor Sublayer Conditions, Kyubyung Kang, Jinwoong Lee, Hojin Park, Jusang Lee
Lessening Density Requirement And Adjusting Density Pay Factors For Asphalt Pavements In Poor Sublayer Conditions, Kyubyung Kang, Jinwoong Lee, Hojin Park, Jusang Lee
JTRP Technical Reports
Current quality control and quality assurance practices for asphalt pavements rely heavily on density (%Gmm) measurements, which are directly linked to pay adjustments. However, these practices can inadvertently encourage over-compaction, leading to issues such as aggregate segregation, crushing, and reduced pavement quality, especially under poor subgrade conditions. This study examines the relationship between the density of newly laid asphalt layers and the conditions of underlying sublayers in Hot Mix Asphalt pavements. This study analyzed INDOT's historical compaction data and conducted gyratory compaction testing. The analysis result revealed a weak negative correlation between subgrade conditions and surface density. Similarly, the gyratory …
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 …
Development Of Latitude/Longitude (And Route/Milepost) Model For Positioning Traffic Management Cameras, Jijo K. Mathew, Haydn Malackowski, Yerassyl Koshan, Christopher Gartner, Jairaj Desai, Howell Li, Edward Cox, Ayman Habib, Darcy M. Bullock
Development Of Latitude/Longitude (And Route/Milepost) Model For Positioning Traffic Management Cameras, Jijo K. Mathew, Haydn Malackowski, Yerassyl Koshan, Christopher Gartner, Jairaj Desai, Howell Li, Edward Cox, Ayman Habib, Darcy M. Bullock
JTRP Technical Reports
Traffic Incident Management (TIM) is a FHWA Every Day Counts initiative with the objective of reducing secondary crashes, improving travel reliability, and ensuring the safety of responders. Agency roadside cameras play a critical role in TIM by helping dispatchers quickly identify the precise location of incidents when receiving reports from motorists with varying levels of spatial accuracy. Reconciling position reports that are often mile-marker based with cameras that operate in a Pan-Tilt-Zoom (PTZ) coordinate system relies on dispatchers having detailed knowledge of hundreds of cameras and perhaps some presets. During real-time incident dispatching, reducing the time it takes to identify …
Developing Ai-Assisted In-Situ Ndt Method For Air-Void Distribution Testing In Fresh And Hardened Concrete, Zhihao Kong, Aritro Roy Mitra, Luna Lu
Developing Ai-Assisted In-Situ Ndt Method For Air-Void Distribution Testing In Fresh And Hardened Concrete, Zhihao Kong, Aritro Roy Mitra, Luna Lu
JTRP Technical Reports
Understanding the air void content in concrete is crucial since it significantly influences the durability and strength of the material, especially in environments susceptible to freeze-thaw cycles. This report introduces an advanced nondestructive testing (NDT) method for the in-situ detection of air voids in concrete by employing diffusive ultrasound. Focusing on the ultrasound attenuation coefficient, this research established a strong correlation with key air void metrics, including the volumetric ratio and spacing factor, as outlined in ASTM C457. The study also undertook a comparative analysis of ASTM C457 methods B and C, revealing the instrument-dependent variability in measuring air voids. …
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 …
Full-Scale Dynamic Wireless Power Transfer And Pilot Project Implementation, Oscar Moncada, Zainab Imran, Connor Vickers, Konstantina Gkritza, Steven Pekarek, Dionysios Aliprantis, Aaron Brovont, Behnam Jahangiri, John E. Haddock
Full-Scale Dynamic Wireless Power Transfer And Pilot Project Implementation, Oscar Moncada, Zainab Imran, Connor Vickers, Konstantina Gkritza, Steven Pekarek, Dionysios Aliprantis, Aaron Brovont, Behnam Jahangiri, John E. Haddock
JTRP Technical Reports
Considering the challenges hindering the widespread adoption of electric vehicles (EVs) and heavy-duty electric vehicles(HDEVs), the integration of dynamic wireless power transfer (DWPT) technology into roadways has gained interest. By embedding DWPT components into pavement, electrical power can be delivered to an EV or HDEV as they are in motion. Yet, large-scale implementation depends on further in-depth research, both to explore optimal construction methods and to understand the impact of embedment on the pavement’s resultant behavior. The objective of this project was trifold: (1) design and evaluate a transmitter-receiver topology for DWPT, (2) enhance the understanding of the interaction between …
Advancing Indot’S Friction Test Program For Seamless Coverage Of System: Pavement Markings, Typical Aggregates, Color Surface Treatment, And Horizontal Curves, Jieyi Bao, Xiaoqiang Hu, Cheng Peng, Junyi Duan, Yizhou Lin, Chengcheng Tao, Yi Jiang, Shuo Li
Advancing Indot’S Friction Test Program For Seamless Coverage Of System: Pavement Markings, Typical Aggregates, Color Surface Treatment, And Horizontal Curves, Jieyi Bao, Xiaoqiang Hu, Cheng Peng, Junyi Duan, Yizhou Lin, Chengcheng Tao, Yi Jiang, Shuo Li
JTRP Technical Reports
Various highway projects, roadway safety, and maintenance all hinge on pavement friction. INDOT's pavement friction test program has played a crucial role in addressing issues like wet pavement crash reduction, durable pavements surface friction, and sustainable aggregates. However, changes in the transportation sector, allied industries, societal needs, and economics present unique challenges that require proactive solutions. First, the existing field friction testing method, which uses a locked wheel skid tester (LWST) is limited to straight, flat pavement sections and excludes crash-prone areas like horizontal curves. Upgrading the program to cover horizontal curves on two-lane rural highways is vital for road …
Overweight Divisible Loads: Permit Administration And Impact On Indiana’S Road Infrastructure And Safety, Samuel Labi, Steven R. Dunlop, Thomas F. Brady Jr., Isaiah C. Mwamba, Dutt J. Thakkar, Sandeep Ramachandran, Burklund Edwards, Rohan Cherian, Maria Alicia Chung Li
Overweight Divisible Loads: Permit Administration And Impact On Indiana’S Road Infrastructure And Safety, Samuel Labi, Steven R. Dunlop, Thomas F. Brady Jr., Isaiah C. Mwamba, Dutt J. Thakkar, Sandeep Ramachandran, Burklund Edwards, Rohan Cherian, Maria Alicia Chung Li
JTRP Technical Reports
Indiana’s House Enrolled Act (HEA) 1190-2021 was implemented in January 2022 to address concerns regarding the overweight (OW) loading behavior of the freight transportation industry and OW permitting. The Act required the Indiana Department of Transportation (INDOT) to adopt emergency rules and a fee structure for the interim period. At the start of the interim period (which is still ongoing at the time of this writing), the permit fee was increased from 7 cents/Equivalent Single Axle Load (ESAL)-mile to 25 cents/ESAL-mile. INDOT commissioned the current study to provide specific information about the effects of the Act on OW permit and …
Development Of A Formalized Program For In-Service Inspection Of Pedestrian Bridges, Aedh A. Alharthi, Robert J. Connor
Development Of A Formalized Program For In-Service Inspection Of Pedestrian Bridges, Aedh A. Alharthi, Robert J. Connor
JTRP Technical Reports
Currently, there are no universally accepted procedures or criteria related to the inspection of pedestrian bridges in the U.S. While some states have some criteria in place, the FHWA has no specific recommendations or requirements for such structures. However, pedestrian bridges can be very complex structures in some cases, whether by using non-redundant cable-supported walkways, curved super structures, or other materials not commonly used in highway bridges. Furthermore, many of these bridges are over busy state highways and carry many pedestrians daily. Due to the Indiana climate, these structures are often subjected to deicing chemicals that are applied more frequently …
Improved Light Weight Deflectometer Test (Lwd) And Analysis, Boonam Shin, Nitin Tiwari, Peter J. Becker, Antonio Bobet
Improved Light Weight Deflectometer Test (Lwd) And Analysis, Boonam Shin, Nitin Tiwari, Peter J. Becker, Antonio Bobet
JTRP Technical Reports
This study focused on improving light weight deflectometer (LWD) testing protocols and understanding material and equipment variability. The Indiana Department of Transportation (INDOT) adopted the LWD test for its efficiency and effectiveness in measuring soil stiffness, a crucial parameter for pavement structural layers. However, challenges remain for implementing LWD testing, particularly in small construction areas. There are also challenges with establishing standardized performance-related criteria for various subgrade treatments. To address these obstacles, this research aimed to develop maximum allowable deflections for compaction quality assurance without relying on site-specific test sections. A large-scale laboratory testing facility was established at the INDOT …
Electric Vehicles: Public Perceptions, Expectations, And Willingness-To-Pay, Bruno Cesar Krause Moras, Xiaowei Chen, Kenny Chandra Wijaya, Satish Ukkusuri, Samuel Labi, Konstantina Gkritza
Electric Vehicles: Public Perceptions, Expectations, And Willingness-To-Pay, Bruno Cesar Krause Moras, Xiaowei Chen, Kenny Chandra Wijaya, Satish Ukkusuri, Samuel Labi, Konstantina Gkritza
JTRP Technical Reports
The primary objective of this project was to understand Indiana resident’s perspectives on electric vehicles (EVs), including adoption incentives and barriers, awareness of adoption incentives, charging preferences, and general travel patterns. A secondary objective was to establish a framework for identifying EV users, detailing their trips, and generating predictions for EV adoption and usage. To achieve these objectives, a stated preference survey was conducted with 1,217 Indiana residents. Two datasets containing travel behavior data were incorporated to generate synthetic data. The survey results revealed that Indiana EV users are typically middle-aged males living and working in urban areas. EV users …
A Design Team’S Perspective-Mixing For Shared Empathic Understandings, Eunhye Kim, Robin Adams, Senay Purzer
A Design Team’S Perspective-Mixing For Shared Empathic Understandings, Eunhye Kim, Robin Adams, Senay Purzer
School of Engineering Education Faculty Publications
Empathic design involves two social practices – collaboration with users and intra team collaboration forshared empathic understandings. This study is focused on the latter phenomenon, aiming to characterise a social mechanism underlying it. To achieve this objective, we used a framework of perspective-mixing in empathic design, including three distinct perspectives: first, second, and third-person perspectives. With this framework, we traced how team members share and integrate individuals’ user knowledge and insights to develop and apply their shared empathic understandings. We conducted conversation analysis to examine one design team’s conversations over a design journey from need-finding to initial ideation to prototyping …
Engaging Community Partners To Enrich Preschoolers Learning Experiences With Dramatic Inquiry, Kathleen M. Farrand, Wendy Peia Oakes, Megan Troxel Deeg, Katelyn Jaworksi, Veronica Leon
Engaging Community Partners To Enrich Preschoolers Learning Experiences With Dramatic Inquiry, Kathleen M. Farrand, Wendy Peia Oakes, Megan Troxel Deeg, Katelyn Jaworksi, Veronica Leon
Journal of the Arts and Special Education
Interdisciplinary teams of adults are needed to enhance the capacity of schools to provide the most appropriate educational experiences for young children who have or are at risk for developmental delays and disabilities (Division for Early Childhood, 2014). When educators, families, and community partners connect around shared goals, we begin to reimagine instructional opportunities and create more equitable access to educational resources for children and families. We share insights from community partners who participated in a collaborative dramatic inquiry study designed to enrich preschoolers’ learning experiences and serve children and families.
Multisensory Adaptations: Creating Art With Students Who Are Blind And Low Vision, Jasmine Begeske, Leslie Walsh, David Ray Miranda
Multisensory Adaptations: Creating Art With Students Who Are Blind And Low Vision, Jasmine Begeske, Leslie Walsh, David Ray Miranda
Journal of the Arts and Special Education
The main purpose of this article is to present approaches and strategies to making 2-D visual arts instruction meaningful and accessible for students who are blind or low vision. The suggestions provided within this article are based on current literature, researcher observations, and the contributions of an experienced, practicing art teacher at the Indiana School for the Blind and Visually Impaired.
Library Steam Kits: Developing Circulatable Curriculum For Community Steam Learning, Daphne Fauber, Ashley Fletcher
Library Steam Kits: Developing Circulatable Curriculum For Community Steam Learning, Daphne Fauber, Ashley Fletcher
Purdue Journal of Service-Learning and International Engagement
Public libraries serve as repositories for a movement described as cultivation of the Library of Things. In the wake of COVID-19, the West Lafayette Public Library enhanced its existing Library of Things collection through the creation of science, technology, engineering, art, and mathematics (STEAM) kits. Since 2017, the West Lafayette Public Library has held regular free STEAM programs for the community; those programs were put on hold during the height of the COVID-19 pandemic, which concurred with a library renovation. These kits provide the community with the ability to learn STEAM concepts at home engaging, hands-on activities that may otherwise …
Warming Up Cold Cases With Dr. Krystal Hans, Vanessa Cooper
Warming Up Cold Cases With Dr. Krystal Hans, Vanessa Cooper
Purdue Journal of Service-Learning and International Engagement
Dr. Krystal Hans is an assistant professor of forensic entomology in the Department of Entomology. Dr. Hans teaches courses on forensic science and forensic entomology, including the “Forensic Investigation” (ENTM 22810) course, where a major component of the course is a cold case project. The cold case project focuses on accessing information about an unresolved case and trains students to engage with empathy as advocates for victims while developing skills in research, digital and information literacy, submission of a Freedom of Information Act (FOIA) request, designing infographics, and public speaking. Students produce digital case files and infographics to display the …
The Complexities Of Green Infrastructure, Troy Weber
The Complexities Of Green Infrastructure, Troy Weber
Purdue Journal of Service-Learning and International Engagement
The Wabash River is the most extensive river system in Indiana. The river drains two-thirds of Indiana’s 92 counties, which can have issues associated with stormwater runoff (Weist, 1981). As precipitation runs off impervious surfaces, it can carry high concentrations of pollutants, such as excess nitrogen and phosphorus, pet waste, and automobile fuel. Prior to impervious runoff entering the river, preexisting contaminants include industrial waste (acid mine drainage and oil field brines), municipal waste, and sediment (Weist, 1981). Thus, stormwater runoff can negatively impact the Wabash River watershed. On top of this pollution, Lafayette and West Lafayette have combined sewer …
Stimulating The Interest Of Young Learners In Physics Through Storytelling And Stem Activities, Emmanuel Babalola, Wonjin Yu, Hillary Ongoyo Omoze, Zainab Saka, Favour Ojike, Iyanu Adedeji, Zhu Yue
Stimulating The Interest Of Young Learners In Physics Through Storytelling And Stem Activities, Emmanuel Babalola, Wonjin Yu, Hillary Ongoyo Omoze, Zainab Saka, Favour Ojike, Iyanu Adedeji, Zhu Yue
Purdue Journal of Service-Learning and International Engagement
The Physics is Fun Project is an initiative funded by Purdue’s Office of Engagement and aims to promote an interest in physics among young learners aged 5 to 12. The project’s unique approach blends instructional design and motivational design to create an engaging and relevant learning experience. Development of the project was guided by the analyze, design, develop, implement, and evaluate (ADDIE) framework and Keller’s attention, relevance, confidence, and satisfaction (ARCS) theory and utilized storytelling and hands-on learning strategies to bring physics to life through the story of a young physics enthusiast who is passionate about building a dream car. …
Service-Learning In Action: Lafayette, Indiana, Rain Garden Installation, Elizabeth Mccleery
Service-Learning In Action: Lafayette, Indiana, Rain Garden Installation, Elizabeth Mccleery
Purdue Journal of Service-Learning and International Engagement
Indiana’s Wabash River is being polluted with contaminated water runoff from precipitation events. A lack of pervious land cover has led to an accumulation of fertilizer, sediment, and waste in the river. Green infrastructure, a stormwater management practice that mimics the natural ecosystem, is one of the most effective ways to prevent pollution from stormwater runoff and benefit the community. This project consisted of a rain garden installation at the Lafayette Fueling Station, a site where frequent water drainage and water runoff into the Wabash occurs. The rain garden will allow on-site water infiltration during rain events and promote natural …
Editorial, Elizabeth B. Brite
Editorial, Elizabeth B. Brite
Purdue Journal of Service-Learning and International Engagement
No abstract provided.
Contents
Purdue Journal of Service-Learning and International Engagement
No abstract provided.
Engineering Students Learning Abroad: Experiences Captured Via Longitudinal Video Reflections, Anne Wrobetz, Kirsten A. Davis, Mayra S. Artiles, Homero Murzi
Engineering Students Learning Abroad: Experiences Captured Via Longitudinal Video Reflections, Anne Wrobetz, Kirsten A. Davis, Mayra S. Artiles, Homero Murzi
School of Engineering Education Faculty Publications
Contribution: Longitudinal video reflections are a unique approach to assessing student learning in study abroad. This study utilizes this method to understand the experiences of ten engineering students. The results show how their learning experiences changed over time and how the students connected these experiences to culture and engineering. Background: Study abroad research has demonstrated that students learn through a variety of experiences while abroad, but this research has been limited by narrow assessments, limited longitudinal data, and a lack of connection to engineering. This study uses longitudinal video reflections to explore student experiences in study abroad programs in a …
Women, Nationalism, And Social Networks In The Habsburg Monarchy, 1848–1918, Marta Verginella
Women, Nationalism, And Social Networks In The Habsburg Monarchy, 1848–1918, Marta Verginella
Central European Studies
Women, Nationalism, and Social Networks in the Habsburg Monarchy, 1848–1918 focuses on the lives of women in Southeastern Europe during the nineteenth and twentieth centuries, exploring the intersection of gender and nationalism. By looking at a wide range of sources and employing rich historiography, this collection investigates the currents of women’s emancipatory efforts in a climate of conflicting assumptions relating to nationhood and nationalization. This book sheds light on a time when both women and nations were working to assert themselves, and how women promoted the national cause in an attempt to assume stronger roles in the public sphere. The …
Deep Learning Approaches For Chaotic Dynamics And High-Resolution Weather Simulations In The Us Midwest, Vlada Volyanskaya, Kabir Batra, Shubham Shrivastava
Deep Learning Approaches For Chaotic Dynamics And High-Resolution Weather Simulations In The Us Midwest, Vlada Volyanskaya, Kabir Batra, Shubham Shrivastava
Discovery Undergraduate Interdisciplinary Research Internship
Weather prediction is indispensable across various sectors, from agriculture to disaster forecasting, deeply influencing daily life and work. Recent advancement of AI foundation models for weather and climate predictions makes it possible to perform a large number of predictions in reasonable time to support timesensitive policy- and decision-making. However, the uncertainty quantification, validation, and attribution of these models have not been well explored, and the lack of knowledge can eventually hinder the improvement of their prediction accuracy and precision. Our project is embarking on a two-fold approach leveraging deep learning techniques (LSTM and Transformer) architectures. Firstly, we model the Lorenz …
Measuring Gas Discharge In Contact Electrification, Hongcheng Tao, James Gibert
Measuring Gas Discharge In Contact Electrification, Hongcheng Tao, James Gibert
Purdue University Libraries Open Access Publishing Fund
Contact electrification in a gas medium is usually followed by partial surface charge dissipation caused by dielectric breakdown of the gas triggered during separation of the surfaces. It is widely assumed that such discharge obeys the classical Paschen’s law, which describes the general dependence of the breakdown voltage on the product of gas pressure and gap distance. However, quantification of this relationship in contact electrification involving insulators is impeded by challenges in nondestructive in situ measurement of the gap voltage. The present work implements an electrode-free strategy for capturing discrete discharge events by monitoring the gap voltage via Coulomb force, …