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Brantley, H., G. Hagler, S. Herndon, P. Massoli, M. Bergin, AND A. Russell. Characterization of Spatial Air Pollution Patterns Near a Large Railyard Area in Atlanta, Georgia. International Journal of Environmental Research and Public Health. Molecular Diversity Preservation International, Basel, Switzerland, 16(4):535, (2019). https://doi.org/10.3390/ijerph16040535

Hagler, G. Cities in 4D: The era of air sensors and a case for environmental engineers and scientists. Association of Environmental Engineering and Science Professors, Phoenix, Arizona, May 14 - 16, 2019.

Williams, R., R. Duvall, Vasu Kilaru, G. Hagler, L. Hassinger, K. Benedict, J. Rice, A. Kaufman, R. Judge, G. Pierce, G. Allen, M. Bergin, R. Cohen, P. Fransioli, M. Gerboles, R. Habre, M. Hannigan, D. Jack, P. Louie, N. Martin, M. Penza, A. Polidori, R. Subramanian, K. Ray, J. Schauer, E. Seto, G. Thurston, J. Turner, A. Wexler, AND Z. Ning. Deliberating performance targets workshop: Potential paths for emerging PM2.5 and O3 air sensor progress. Atmospheric Environment: X. Elsevier B.V., Amsterdam, Netherlands, 2:100031, (2019). https://doi.org/10.1016/j.aeaoa.2019.100031

Feinberg, S., R. Williams, G. Hagler, J. Low, L. Smith, R. Brown, D. Garver, M. Davis, M. Morton, J. Schaefer, AND J. Campbell. Examining spatiotemporal variability of urban particulate matter and application of high-time resolution data from a network of low-cost air pollution sensors. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 213:579-584, (2019). https://doi.org/10.1016/j.atmosenv.2019.06.026

Mathur, R., C. Hogrefe, J. Szykman, G. Hagler, A. Hakami, AND S. Zhao. Need and potential benefits of improving aloft air pollution characterization: A modeling perspective. ITM 2019 - 37th International Technical Meeting on Air Pollution Modelling and its Application, Hamburg, GERMANY, September 23 - 27, 2019.

Pinder, R., J. Klopp, G. Kleiman, G. Hagler, Y. Awe, AND S. Terry. Opportunities and challenges for filling the air quality data gap in low- and middle-income countries. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 215:116794, (2019). https://doi.org/10.1016/j.atmosenv.2019.06.032

Wei, P., Z. Ning, D. Westerdahl, Y. Lam, P. Louie, R. Sharpe, R. Williams, AND G. Hagler. Solar-powered air quality monitor applied under subtropical conditions in Hong Kong: Performance evaluation and application for pollution source tracking. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 214:116825, (2019). https://doi.org/10.1016/j.atmosenv.2019.116825

Hagler, G. Summary and Status of the 2018 Workshop on PM2.5 and Ozone. AIR SENSORS 2019: EPA's Second Workshop on Deliberating Performance Targets for Air Quality Sensors, Durham, NC, July 16 - 17, 2019.

Schneider, P., A. Bartonova, N. Castell, F. Dauge, M. Gerboles, G. Hagler, C. Huglin, R. Jones, S. Khan, A. Lewis, B. Mijling, M. Muller, M. Penza, L. Spinelle, B. Stacy, M. Vogt, J. Wesseling, AND R. Williams. Toward a Unified Terminology of Processing Levels for Low-Cost Air-Quality Sensors. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 53(15):8485-8487, (2019). https://doi.org/10.1021/acs.est.9b03950

Mathur, R., C. Hogrefe, A. Hakami, S. Zhao, Jim Szykman, AND G. Hagler. A Call for an Aloft Air Quality Monitoring Network: Need, Feasibility, and Potential Value. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 52(19):10903–10908, (2018). https://doi.org/10.1021/acs.est.8b02496

Hagler, G. AQ Management Systems: Evaluating Sensor Quality. 2018 MARAMA Monitoring Committee Training Workshop, Charlottesville, VA, December 04 - 06, 2018.

Williams, R., D. Nash, G. Hagler, K. Benedict, I. MacGregor, B. Seay, M. Lawrence, AND T. Dye. Air Quality Sensor Technologies: Ozone Literature Findings. EPA Sensor Performance Deliberations Workshop, Research Triangle Park, NC, June 25 - 27, 2018.

Williams, R., D. Nash, G. Hagler, K. Benedict, I. MacGregor, B. Seay, M. Lawrence, AND T. Dye. Air Quality Sensor Technologies: PM2.5 Literature Findings. EPA Workshop & Webinar: Deliberating Performance Targets for Air Quality Sensors, Durham, NC, June 25 - 27, 2018.

Hagler, G., R. Williams, V. Papapostolou, AND A. Polidori. Air Quality Sensors and Data Adjustment Algorithms: When Is It No Longer a Measurement? ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 52(10):5530–5531, (2018). https://doi.org/10.1021/acs.est.8b01826

Morawska, L., P. Thai, X. Liu, A. Asumadu-Sakyi, G. Ayoko, A. Bartonova, A. Bedini, F. Chai, B. Christensen, M. Dunbabin, J. Gao, G. Hagler, R. Jayaratne, P. Kumar, A. Lau, P. Louie, M. Mazaheri, Z. Ning, N. Motta, B. Mullins, M. Rahman, Z. Ristovski, M. Shafiei, D. Tjondronegoro, D. Westerdahl, AND R. Williams. Applications of low-cost sensing technologies for air quality monitoring and exposure assessment: How far have they gone? ENVIRONMENT INTERNATIONAL. Elsevier B.V., Amsterdam, Netherlands, 116:286-299, (2018). https://doi.org/10.1016/j.envint.2018.04.018

Feinberg, S., R. Williams, G. Hagler, J. Low, L. Smith, R. Brown, D. Garver, M. Davis, M. Morton, J. Schaefer, J. Campbell, AND T. McArthur. CitySpace Air Sensor Network: Application of High-Time Resolution Data from a Network of Low-Cost Air Sensor Technology to Examine Urban Air Pollution. 2018 International Aerosol Conference, St. Louis, MI, September 02 - 07, 2018.

Conner, T., Sue Kimbrough, R. Williams, B. Johns, J. White, AND G. Hagler. EPA’s Village Green Sensor-Based Air Monitoring Stations: Long-term Performance of PM2.5 Sensors. 2018 International Aerosol Conference, St Louis, MO, September 02 - 07, 2018.

Feinberg, S., R. Williams, G. Hagler, J. Rickard, R. Brown, D. Garver, G. Harshfield, P. Stauffer, E. Mattson, R. Judge, AND S. Garvey. Long-term evaluation of air sensor technology under ambient conditions in Denver, Colorado. Atmospheric Measurement Techniques. Copernicus Publications, Katlenburg-Lindau, Germany, 11(8):4605-4615, (2018). https://doi.org/10.5194/amt-11-4605-2018

Williams, R., Vasu Kilaru, T. Conner, A. Clements, M. Colon, M. Breen, J. Bash, R. Duvall, Jim Szykman, M. Landis, P. Solomon, S. Kaushik, D. Holland, R. Callan, G. Hagler, Sue Kimbrough, B. Gullett, A. Holder, A. Kaufman, S. Reece, AND S. Feinberg. New Paradigm for Air Pollution Monitoring: Emerging Sensor Technologies 2014-2018 Progress Report. To be Presented at ACE Webinar, Research Triangle Park, NC, April 30, 2018.

Hagler, G. New developments in air monitoring research at U.S. EPA. 2018 National Ambient Air Monitoring Conference, Portland, OR, August 13 - 16, 2018.

Hagler, G. Overview of Emerging Air Quality Monitoring Technologies and Their Data. Air Quality Planning for Wildland Smoke, Research Triangle Park, NC, February 01, 2018.

Williams, R., D. Nash, G. Hagler, K. Benedict, I. MacGregor, B. Seay, M. Lawrence, AND T. Dye. Peer Review and Supporting Literature Review of Air Sensor Technology Performance Targets. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-18/324, 2018.

Hagler, G. Recent Developments in Air Monitoring Technology Relevant to Wildfire Smoke. APHA 2018 Annual Meeting and Expo, San Diego, CA, November 12 - 14, 2018.

Hagler, G. Resolving air quality data gaps – are sensors the solution? GE Symposium - Sensing Systems: Intelligence & Awareness, Niskayuna, New York, September 05, 2018.

Hagler, G. Wildland Fire Air Quality Response Program and Emerging Air Monitoring Technologies. APHA State Affiliates Webinar, Research Triangle Park, NC, December 03, 2018.