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Articles 1051 - 1080 of 13650
Full-Text Articles in Entire DC Network
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.
Machine Embroidery Of Light-Emitting Textiles With Multicolor Electroluminescent Threads, Seungse Cho, Taehoo Chang, Tianhao Yu, Sunland L. Gong, Chi Hwan Lee
Machine Embroidery Of Light-Emitting Textiles With Multicolor Electroluminescent Threads, Seungse Cho, Taehoo Chang, Tianhao Yu, Sunland L. Gong, Chi Hwan Lee
Purdue University Libraries Open Access Publishing Fund
Advances in electroluminescent threads, suitable for weaving or knitting, have opened doors for the development of light-emitting textiles, driving growth in the market for flexible and wearable displays. Although direct embroidery of these textiles with custom designs and patterns could offer substantial benefits, the rigorous demands of machine embroidery challenge the integrity of these threads. Here, we present embroiderable multicolor electroluminescent threads—in blue, green, and yellow—that are compatible with standard embroidery machines. These threads can be used to stitch decorative designs onto various consumer fabrics without compromising their wear resistance or light-emitting capabilities. Demonstrations include illuminating specific messages or designs …
Utilizing Culturally Responsive Strategies To Inspire African American Female Participation In Cybersecurity, Deanna Bailey, Michel Kornegay, Ladawn Partlow, Charnee Bowens, Karen Gareis, Kevin Kornegay
Utilizing Culturally Responsive Strategies To Inspire African American Female Participation In Cybersecurity, Deanna Bailey, Michel Kornegay, Ladawn Partlow, Charnee Bowens, Karen Gareis, Kevin Kornegay
Journal of Pre-College Engineering Education Research (J-PEER)
The number of African American females participating in cyber fields is significantly low. Science, technology, engineering, and mathematics (STEM) education requires a new approach to student engagement to increase African American female participation in cybersecurity. The most common approach to engaging more African American females in STEM is to provide students access to professional images or role models active in STEM; however, more is needed. More race-centered strategies beyond role modeling are necessary to attract and retain African American females in STEM. Research studies show that integrating personal experiences and making cultural connections can help improve student participation in STEM …
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.
On Linguistic Justice In The Writing Center: A Genesis Story, Ghada Gherwash
On Linguistic Justice In The Writing Center: A Genesis Story, Ghada Gherwash
The Writing Center Journal
This essay presents a reflective account of the origin story of a linguistics justice initiative within the writing center. It concludes by posing questions aimed at promoting dialogue among writing center practitioners as they consider similar initiatives within their own contexts.
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 …
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 …
Business Processes To Prioritize Traffic Signal Retiming And Assess The Impact Of Retiming Activities, Enrique D. Saldivar-Carranza, Tom Platte, Terri Wills, James Sturdevant, Darcy M. Bullock
Business Processes To Prioritize Traffic Signal Retiming And Assess The Impact Of Retiming Activities, Enrique D. Saldivar-Carranza, Tom Platte, Terri Wills, James Sturdevant, Darcy M. Bullock
JTRP Technical Reports
The Indiana Department of Transportation (INDOT) manages over 2,000 traffic signals in the State. It is unfeasible to identify systemwide improvement opportunities by evaluating the performance of thousands of traffic signals on monitoring dashboards. This report describes how a scalable technique based on connected vehicle (CV) trajectory data systematically evaluates performance at the movement level to prioritize retiming and maintenance activities. In total, eleven timing changes were implemented at nine traffic signals over various time-of-day (TOD) periods using the proposed approach. The method achieved average control delay and split failure reductions of up to 53 sec/veh and 30%, respectively. A …
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 …
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 …
Traffic Management Geocast Study With Connected Vehicles On Indiana Highways, Zhitong He, Abin Mathew, Abhijeet Ingale, Jue Zhou, Feng Li, Yaobin Chen
Traffic Management Geocast Study With Connected Vehicles On Indiana Highways, Zhitong He, Abin Mathew, Abhijeet Ingale, Jue Zhou, Feng Li, Yaobin Chen
JTRP Technical Reports
Vehicular communication allows vehicles to interact with road users, roadside infrastructure, and cloud-connected devices.It holds a crucial position in modern transportation systems, impacting both fundamental and advanced aspects and enhancing traffic safety and efficiency. C-V2X is a wireless communication technology that uses cellular networks to enable communication between vehicles and infrastructure. C-V2X can be used for applications such as collision avoidance, traffic management, and remote vehicle diagnostics. This project conducted a feasibility study on the current position of C-V2X in the industry and developed a prototype, RampCast, to fundamentally understand the current C-V2X implementations as part of the 3GPP Release …
Statewide Screening Of Signalized Intersections For Capacity Improvements, Saumabha Gayen, Enrique D. Saldivar-Carranza, Rahul Suryakant Sakhare, Jairaj Desai, Jijo K. Mathew, Nathan Shellhamer, Taylor Ruble, Dan Mccoy, Jack Gallagher, Darcy M. Bullock
Statewide Screening Of Signalized Intersections For Capacity Improvements, Saumabha Gayen, Enrique D. Saldivar-Carranza, Rahul Suryakant Sakhare, Jairaj Desai, Jijo K. Mathew, Nathan Shellhamer, Taylor Ruble, Dan Mccoy, Jack Gallagher, Darcy M. Bullock
JTRP Technical Reports
Identification of congested traffic signals that require capital investment to increase capacity has historically been a time-consuming process. Signalized intersections with congestion were analyzed to see if they could be improved through retiming, and capital investment was only considered if retiming is deemed infeasible. Automated Traffic Signal Performance Measures (ATSPMs), and more recently, signal performance measures (SPMs) derived from connected vehicle (CV) trajectory data, have already been used to streamline the process of identifying signalized intersections that can be improved through retiming. However, to date, similar efforts have not been used to identify intersections that may benefit from capital investment. …
Field Handbook For Maintenance And Preservation Treatments Of Concrete Pavements, Mohammadreza Mirzahosseini, Jan Olek, Dulcy M. Abraham, Prashant Ram, Kurt Smith
Field Handbook For Maintenance And Preservation Treatments Of Concrete Pavements, Mohammadreza Mirzahosseini, Jan Olek, Dulcy M. Abraham, Prashant Ram, Kurt Smith
JTRP Technical Reports
Information related to maintenance and preservation (M&P) treatments of Portland cement concrete pavement (PCCP) has not been uniformly presented across various Indiana Department of Transportation (INDOT) maintenance-related documents, including INDOT Standard Specifications and the INDOT Design Manual. Since this data is scattered across different documents and frequently incomplete, it is often challenging for field personnel to obtain consistent information which can assist in making decisions related to selection of treatments that can benefit the service life of concrete pavements. To address this gap, the SPR-4601 guidebook was developed to provide succinct descriptions of common distresses and failures observed in concrete …
Impacts Of Autonomous Truck-Mounted Attenuator (Atma) On Indot Work Zone Safety, Mobility, And Worker Productivity, Chi Tian, Yiheng Feng, Yunfeng Chen, Jiansong Zhang
Impacts Of Autonomous Truck-Mounted Attenuator (Atma) On Indot Work Zone Safety, Mobility, And Worker Productivity, Chi Tian, Yiheng Feng, Yunfeng Chen, Jiansong Zhang
JTRP Technical Reports
Work zone safety has been a major concern for many stakeholders including the state Departments of Transportation (DOTs). To prevent DOT workers, especially truck mounted attenuator (TMA) drivers from injuries, the Autonomous Truck Mounted Attenuator (ATMA) technology is developed. To understand the current testing and deployment status of ATMA, we began with interviews with project managers and researchers in four state DOTs who have experience with the ATMA system. Then, we systematically reviewed, tested, and evaluated the ATMA system in both simulation and real-world environments under various operating scenarios, traffic conditions, and mobile work zone operations. Furthermore, Indiana Department of …
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 Battery Energy Storage And Thermal Energy Storage, Jason Woods, Eric Kozubal
Electric Battery Energy Storage And Thermal Energy Storage, Jason Woods, Eric Kozubal
International High Performance Buildings Conference
No abstract provided.
Data-Driven Modeling Of Microchannel Heat Exchangers Utilizing Dimensionless Numbers For Enhanced Prediction, Junjia Zou, Yi Chen, Chen Zheng, Long Huang
Data-Driven Modeling Of Microchannel Heat Exchangers Utilizing Dimensionless Numbers For Enhanced Prediction, Junjia Zou, Yi Chen, Chen Zheng, Long Huang
International Refrigeration and Air Conditioning Conference
No abstract provided.
Performance Of R32/R1234yf Blends As Potential Lower Gwp Replacements For R410a In A 3 Rt Rooftop Heat Pump, Kenneth Schultz, Michael Petersen, Gurudath Nayak
Performance Of R32/R1234yf Blends As Potential Lower Gwp Replacements For R410a In A 3 Rt Rooftop Heat Pump, Kenneth Schultz, Michael Petersen, Gurudath Nayak
International Refrigeration and Air Conditioning Conference
No abstract provided.
Development Of Defrost Controller Platform For Commercial Rooftop Heat Pump Units, Julfikar Ali, Rana Siddharth, Aaron Alexander, Christian K. Bach
Development Of Defrost Controller Platform For Commercial Rooftop Heat Pump Units, Julfikar Ali, Rana Siddharth, Aaron Alexander, Christian K. Bach
International Refrigeration and Air Conditioning Conference
No abstract provided.
Heat Pumps With Integrated Thermochemical Energy Storage For Electricity Load Levelling, Allannah Duffy, Alper Saygin, Srinivas Garimella
Heat Pumps With Integrated Thermochemical Energy Storage For Electricity Load Levelling, Allannah Duffy, Alper Saygin, Srinivas Garimella
International Refrigeration and Air Conditioning Conference
No abstract provided.
Experimental Results From A 70 Kw Steam-Generating Butane Heat Pump Using Off-The-Shelve Components, Michael Uhlmann, Leon P. M. Brendel, Cordin Arpagaus, Luiseric E. Olmedo, Jurg Schiffmann, Stefan S. Bertsch
Experimental Results From A 70 Kw Steam-Generating Butane Heat Pump Using Off-The-Shelve Components, Michael Uhlmann, Leon P. M. Brendel, Cordin Arpagaus, Luiseric E. Olmedo, Jurg Schiffmann, Stefan S. Bertsch
International Refrigeration and Air Conditioning Conference
No abstract provided.
Environmental Aspects Of Hfos And Hcfos: Atmospheric Lifetimes, Relevant Policy Metrics And Degradation Products, Dimitrios K. Papanastasiou
Environmental Aspects Of Hfos And Hcfos: Atmospheric Lifetimes, Relevant Policy Metrics And Degradation Products, Dimitrios K. Papanastasiou
International Refrigeration and Air Conditioning Conference
No abstract provided.
Performance Evaluation Of A Water-To-Water Heat Pump Using The New Low Global Warming Potential Mixture R1234yf/R600a (0.85/0.15) As Drop-In Replacement For R134a Refrigerant, Giulia Lombardo, Yeonwoo Jeong, Stefano Rossi, Davide Menegazzo, Michele De Carli, Laura Fedele, Sergio Bobbo, Min Soo Kim
Performance Evaluation Of A Water-To-Water Heat Pump Using The New Low Global Warming Potential Mixture R1234yf/R600a (0.85/0.15) As Drop-In Replacement For R134a Refrigerant, Giulia Lombardo, Yeonwoo Jeong, Stefano Rossi, Davide Menegazzo, Michele De Carli, Laura Fedele, Sergio Bobbo, Min Soo Kim
International Refrigeration and Air Conditioning Conference
No abstract provided.
Deployment Of R290 In Heat Pump Water Heaters And Implications For Decarbonization, Kashif Nawaz, Joseph Rendall, Ahmed Elatar, Jian Sun
Deployment Of R290 In Heat Pump Water Heaters And Implications For Decarbonization, Kashif Nawaz, Joseph Rendall, Ahmed Elatar, Jian Sun
International Refrigeration and Air Conditioning Conference
No abstract provided.
Does Stem Integration In High School Mathematics Classes In Underserved Schools Benefit Students' Standardized Testing Outcomes?, Steve Heinold
Does Stem Integration In High School Mathematics Classes In Underserved Schools Benefit Students' Standardized Testing Outcomes?, Steve Heinold
Indiana STEM Education Conference
STEM education in Indiana has become increasingly popular with, among many other factors, the recent focus by the Indiana Department of Education on the STEM workforce pipeline and school STEM certification (IDoE, 2023b). Some previous research has shown that integrating STEM into science classes and afterschool spaces has helped students from low-income communities catch up to their higher-income peers on assessments like high-stakes standardized testing (Bartell et al., 2008; Hurley, 2001; Weissglass, 2011). However, regarding STEM integration into mathematics classes, it can be more challenging than integration into other classes like science (Walker, 2016) and large gaps remain in the …
Air Conditioning Compressor Oil Enhancement Using Carbon-Based Nanolubricants, Hessah Althalab, Naser Ali, Shikha Ebrahim, Ammar Bahman
Air Conditioning Compressor Oil Enhancement Using Carbon-Based Nanolubricants, Hessah Althalab, Naser Ali, Shikha Ebrahim, Ammar Bahman
International Compressor Engineering Conference
No abstract provided.
Vapor Injection Compressors: A Review Of Opportunities, Testing And Sampling Techniques, And Methods Of Characterization, Timothy Kim, Dennis Nasuta, Shankhinee Deshpande, Song Li, Cara Martin
Vapor Injection Compressors: A Review Of Opportunities, Testing And Sampling Techniques, And Methods Of Characterization, Timothy Kim, Dennis Nasuta, Shankhinee Deshpande, Song Li, Cara Martin
International Compressor Engineering Conference
No abstract provided.
New Understanding Of Higher Oil Film Between Scroll Wraps Of Scroll Compressors Due To Rolling And Sliding, Keiko Anami, Ryosuke Okamoto, Masaru Tanaka, Kenichi Sata, Hideki Matsuura, Yukiko Maejima, Kosuke Nishimura, Kanetaka Miyazawa
New Understanding Of Higher Oil Film Between Scroll Wraps Of Scroll Compressors Due To Rolling And Sliding, Keiko Anami, Ryosuke Okamoto, Masaru Tanaka, Kenichi Sata, Hideki Matsuura, Yukiko Maejima, Kosuke Nishimura, Kanetaka Miyazawa
International Compressor Engineering Conference
No abstract provided.
Verification Of High-Performance Lubrication Due To Precession-Rolling In A Fully Loaded Thrust-Slide Bearing In A Large Capacity Scroll Compressor, Jin Takeda, Yoshinobu Yosuke, Hiroshi Kitaura, Keiko Anami, Noriaki Ishii
Verification Of High-Performance Lubrication Due To Precession-Rolling In A Fully Loaded Thrust-Slide Bearing In A Large Capacity Scroll Compressor, Jin Takeda, Yoshinobu Yosuke, Hiroshi Kitaura, Keiko Anami, Noriaki Ishii
International Compressor Engineering Conference
No abstract provided.