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Articles 1081 - 1110 of 18496
Full-Text Articles in Entire DC Network
Characterizing Differential Reflectivity Calibration Dependence On Environmental Temperature Using The X-Band Teaching And Research Radar (Xtrra): Looking For A Relationship Between Temperature And Differential Reflectivity Bias, Emma Miller
The Journal of Purdue Undergraduate Research
Calibration scans are important for the maintenance of data and the quality of the information that radars output. In this study we looked for a temperature dependency in a full year’s worth of differential reflectivity (ZDR) calibration scan data collected by the X-band Teaching and Research Radar (XTRRA) located near the Purdue University campus. In a vertically pointing calibration scan, the radar scans the drops from below while rotating. From this angle, the overall shape will be circular, which corresponds to a ZDR value of approximately 0 dB. To process the data for the year 2021, a Python script was …
Machine Learning Of Big Data: A Gaussian Regression Model To Predict The Spatiotemporal Distribution Of Ground Ozone, Jerry Gu
The Journal of Purdue Undergraduate Research
Tracking pollution levels on the ground is important to the environment and public health. One of the pollutants of concern is ozone, which, at high concentrations, can cause respiratory and cardiovascular problems. The National Center for Atmospheric Research (NCAR) has published valuable ozone data obtained from ground-based sensors installed at selected locations. Because it is unfeasible to measure the exact ozone levels everywhere at any time, it would be valuable to predict the temporal-spatial distributions of ozone concentration based on existing data. This would help us better understand the patterns and trends in the data and make better decisions to …
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, …
Clouds In The Ancient Lunar Atmosphere: Water Ice Nucleation On Aerosol Simulants, Mariana C. Aguilar
Clouds In The Ancient Lunar Atmosphere: Water Ice Nucleation On Aerosol Simulants, Mariana C. Aguilar
The Journal of Purdue Undergraduate Research
Today’s moon is vastly different from what it was 3 billion years ago. At that time, it was home to a collisional atmosphere formed through massive amounts of volcanism, releasing enough subsurface gas to sustain surface pressures of up to 1 kPa. Observations of our solar system have taught us that all dense atmospheres are host to clouds and aerosols, and we expect the Moon’s to be no different. Knowing when, where, and under what conditions cloud particles form is important for understanding the evolution of the lunar atmosphere, how it reacted to temperature gradients, and how it cycled volatiles. …
High Tunnel Broccoli Cultivar Evaluations, Lewis Jett
High Tunnel Broccoli Cultivar Evaluations, Lewis Jett
Midwest Vegetable Trial Reports
Broccoli is a potentially profitable crop for high tunnel production. Updated information on yield and quality of new cultivars is important for producers making planting decisions. This evaluation of 11 cultivars was conducted within a high tunnel in Fall 2023.
Timely, Relevant, Practical: A Study Of Writing Center Summer Institute Alumni Perceptions Of Value And Benefits, Julia Bleakney, Mark Hall, Kelsey Hixson-Bowles, Sohui Lee, Nathalie Singh-Corcoran
Timely, Relevant, Practical: A Study Of Writing Center Summer Institute Alumni Perceptions Of Value And Benefits, Julia Bleakney, Mark Hall, Kelsey Hixson-Bowles, Sohui Lee, Nathalie Singh-Corcoran
The Writing Center Journal
Since its inception in 2003, the IWCA Summer Institute (SI) has been understood within the writing center field to be an important professional development opportunity for new and experienced writing center professionals (WCPs). Publications on the SI to date have focused on anecdotal perceptions of the benefits to leaders and participants or on a single outcome, such as research output. Thus, the writing center field knows little about how and in what ways participants perceive the SI’s benefits across cohorts and across a variety of professional areas. By gathering quantitative and qualitative data from every SI cohort from 2003 to …
Accidental Outreach And Happenstance Staffing: A Cross-Institutional Study Of Writing Center Support Of First-Generation College Students, Beth A. Towle
The Writing Center Journal
First-generation students (FGS) make up a significant percentage of college populations. However, they experience hardships that are less common for their continuing-generation peers. They struggle to understand the “rules” of college and lack the cultural capital that can help students succeed through generations of knowledge about how to navigate college. Writing centers attempt to lessen these burdens by providing outreach to marginalized student populations, including FGS. However, there has been a lack of cross-institutional research that examines exactly how writing centers support FGS. This article presents a mixed-methods study that begins to close that knowledge gap and demonstrate common patterns …
Reducing Global Food Loss And Waste Could Improve Air Quality And Lower The Risk Of Premature Mortality, Alessandro Gatto, Maksym Chepeliev
Reducing Global Food Loss And Waste Could Improve Air Quality And Lower The Risk Of Premature Mortality, Alessandro Gatto, Maksym Chepeliev
Department of Agricultural Economics Faculty Publications
While the global food system substantially contributes to environmental degradation and climate change, significant amounts of lost or wasted foods along the food supply chain actively contribute to global air pollution and related health risks. In this study, we use an environmentally-extended input–output model to quantify air pollution embedded in global food loss and waste (FLW) and investigate how FLW reduction policies can mitigate air pollution linked to food consumption, decreasing associated premature mortality risks across global regions. While estimating a positive impact of FLW reduction policies on decreasing air pollution levels (from −1.5% of SO2 emissions to −10.2% of …
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.
Changes In Adult Well-Being And Economic Inequalities: An Exploratory Observational Longitudinal Study (2002–2010) Of Micro-Level Trends Among Tsimane’, A Small-Scale Rural Society Of Indigenous People In The Bolivian Amazon, Ricardo Godoy, Jonathan Bauchet, Jere R. Behrman, Tomás Huanca, William R. Leonard, Victoria Reyes-García, Asher Rosinger, Susan Tanner, Eduardo A. Undurraga, Ariela Zycherman
Changes In Adult Well-Being And Economic Inequalities: An Exploratory Observational Longitudinal Study (2002–2010) Of Micro-Level Trends Among Tsimane’, A Small-Scale Rural Society Of Indigenous People In The Bolivian Amazon, Ricardo Godoy, Jonathan Bauchet, Jere R. Behrman, Tomás Huanca, William R. Leonard, Victoria Reyes-García, Asher Rosinger, Susan Tanner, Eduardo A. Undurraga, Ariela Zycherman
Department of Agricultural Economics Faculty Publications
Knowing what happens over time to the lifeways of people in contemporary small-scale non-industrial societies of the rural Global South matters because it helps assess changes in the quality of life of underrepresented groups. It has been hard to answer the question because longitudinal information is rarely collected in such settings. A longitudinal dataset of nine years (2002–2010) from a horticultural-foraging society of Indigenous People in the Bolivian Amazon (Tsimane’) is used for an exploratory analysis of micro-level trends in indicators of well-being and economic inequalities. We selected 13 Tsimane’ villages (from ∼ 100) that varied in proximity to town …
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 …
Dynamic Modeling Of Near Isothermal Compressor For Transcritical Carbon Dioxide Cycle, Haopeng Liu, Vikrant Aute, Yunho Hwang, Chengyi Lee, Jan Muehlbauer, Lei Gao
Dynamic Modeling Of Near Isothermal Compressor For Transcritical Carbon Dioxide Cycle, Haopeng Liu, Vikrant Aute, Yunho Hwang, Chengyi Lee, Jan Muehlbauer, Lei Gao
International Compressor Engineering Conference
No abstract provided.
Reed Valve Simulation Using 3d High-Order Finite Volume And Finite Element Methods, Pablo Castrillo, Eugenio Schillaci, Joaquim Rigola
Reed Valve Simulation Using 3d High-Order Finite Volume And Finite Element Methods, Pablo Castrillo, Eugenio Schillaci, Joaquim Rigola
International Compressor Engineering Conference
No abstract provided.
Material Compatibility Of Seal Materials With Low Gwp Refrigerants And Lubricant, Cameron Robaczewski, Morgan Herried Leehey, Zachary Dedeker
Material Compatibility Of Seal Materials With Low Gwp Refrigerants And Lubricant, Cameron Robaczewski, Morgan Herried Leehey, Zachary Dedeker
International Compressor Engineering Conference
No abstract provided.
How High Is High: What Temperatures Can We Achieve With High Temperature Heat Pumps?, Neil James Hewitt
How High Is High: What Temperatures Can We Achieve With High Temperature Heat Pumps?, Neil James Hewitt
International Refrigeration and Air Conditioning Conference
No abstract provided.
A Hybrid Rf-Symbolic Regression Approach For Accurate Solar Irradiance Prediction In Mountain Regions, Aleksandr Gevorgian, Giovanni Pernigotto, Andrea Gasparella
A Hybrid Rf-Symbolic Regression Approach For Accurate Solar Irradiance Prediction In Mountain Regions, Aleksandr Gevorgian, Giovanni Pernigotto, Andrea Gasparella
International High Performance Buildings Conference
No abstract provided.
Indoor Atmospheric Nanocluster Aerosol Dynamics In Residential Buildings, Satya Patra, Gerhard Steiner, Nusrat Jung, Brandon Boor
Indoor Atmospheric Nanocluster Aerosol Dynamics In Residential Buildings, Satya Patra, Gerhard Steiner, Nusrat Jung, Brandon Boor
International High Performance Buildings Conference
No abstract provided.
Open-Source Tool-Box For Identifying Envelope Dynamics Of Detached Residential Buildings, Elias N. Pergantis, Jaewon Park, Priyadarshan Priyadarshan, Trevor J. Bird, Davide Ziviani, Kevin J. Kircher
Open-Source Tool-Box For Identifying Envelope Dynamics Of Detached Residential Buildings, Elias N. Pergantis, Jaewon Park, Priyadarshan Priyadarshan, Trevor J. Bird, Davide Ziviani, Kevin J. Kircher
International High Performance Buildings Conference
No abstract provided.
Performance Comparison Of A Centrifugal Shipboard Chiller Using R-134a And A Low-Global Warming Potential Replacement, Patrick Gresh-Sill, Florin Iancu, Brian M. Fronk
Performance Comparison Of A Centrifugal Shipboard Chiller Using R-134a And A Low-Global Warming Potential Replacement, Patrick Gresh-Sill, Florin Iancu, Brian M. Fronk
International Refrigeration and Air Conditioning Conference
No abstract provided.
Modeling And Analysis Of A Heat Pump Clothes Dryer With Thermal Energy Storage, Xiaoli Liu, Cheng-Min Yang, Pengtao Wang, Kashif Nawaz, Christopher Hartnett, Troy Seay
Modeling And Analysis Of A Heat Pump Clothes Dryer With Thermal Energy Storage, Xiaoli Liu, Cheng-Min Yang, Pengtao Wang, Kashif Nawaz, Christopher Hartnett, Troy Seay
International Refrigeration and Air Conditioning Conference
No abstract provided.
A Dynamic Model Of Refrigerator With Energy Storage For Demand Flexibility, Yanfei Li, Zhiming Gao, Philip Boudreaux, Kashif Nawaz
A Dynamic Model Of Refrigerator With Energy Storage For Demand Flexibility, Yanfei Li, Zhiming Gao, Philip Boudreaux, Kashif Nawaz
International Refrigeration and Air Conditioning Conference
No abstract provided.
High-Temperature Heat Pumps And Their Role In The Decarbonization Of Buildings And Industry, Kashif Nawaz, Pengtao Wang, Jian Sun, Steve Kowalski
High-Temperature Heat Pumps And Their Role In The Decarbonization Of Buildings And Industry, Kashif Nawaz, Pengtao Wang, Jian Sun, Steve Kowalski
International Refrigeration and Air Conditioning Conference
No abstract provided.
Development And Experimental Validation Of Simplified Numerical Models For Stratified Thermal Energy Storage (Tes) Tanks Including Storage Mode And Adverse Feed Temperatures., Pouria Moghimi, Khaled I. Alghamdi, Christian K. Bach, Jeffrey D. Spitler
Development And Experimental Validation Of Simplified Numerical Models For Stratified Thermal Energy Storage (Tes) Tanks Including Storage Mode And Adverse Feed Temperatures., Pouria Moghimi, Khaled I. Alghamdi, Christian K. Bach, Jeffrey D. Spitler
International Refrigeration and Air Conditioning Conference
No abstract provided.
Energy-Saving Control Method Of Nh3-Co2 Cascade Refrigeration System Driven By A Hybrid Mechanism-Based And Data-Based Approach, Yiwei Feng, Chuang Wang, Shengli Qu, Yanpeng Li, Dawe Ren, Ziwen Xing
Energy-Saving Control Method Of Nh3-Co2 Cascade Refrigeration System Driven By A Hybrid Mechanism-Based And Data-Based Approach, Yiwei Feng, Chuang Wang, Shengli Qu, Yanpeng Li, Dawe Ren, Ziwen Xing
International Refrigeration and Air Conditioning Conference
No abstract provided.
An Empirical Data-Driven Model For Energy Consumption Prediction Of A Heat-Pump-Driven Liquid-Desiccant Air-Conditioning System, Jae-Hee Lee, Minseong Kim, Ha-Youn Cho, Jae-Weon Jeong
An Empirical Data-Driven Model For Energy Consumption Prediction Of A Heat-Pump-Driven Liquid-Desiccant Air-Conditioning System, Jae-Hee Lee, Minseong Kim, Ha-Youn Cho, Jae-Weon Jeong
International Refrigeration and Air Conditioning 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.
Saft-Based Refrigerant Property Models Accounting For Polarity, Ian Bell
Saft-Based Refrigerant Property Models Accounting For Polarity, Ian Bell
International Refrigeration and Air Conditioning Conference
No abstract provided.
Exploring The Power Demand And Efficiency Performance Limits Of Heat Pumps With Thermal Storage, Kyle Gluesenkamp, Damiola Akamo, Zhenning Li, Yiyuan Qiao, Jason Hirschey, Xiaobing Liu, Bo Shen
Exploring The Power Demand And Efficiency Performance Limits Of Heat Pumps With Thermal Storage, Kyle Gluesenkamp, Damiola Akamo, Zhenning Li, Yiyuan Qiao, Jason Hirschey, Xiaobing Liu, Bo Shen
International High Performance Buildings 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.