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1. Numerically resolved Radiation View Factors via Multi-GPU Accelerated Ray Tracing

Author

Richmond, Katie, Asher, Hancock, Shervin, Sammak, Barry, Matthew, Richmond, Katie, Asher, Hancock, Shervin, Sammak, and Barry, Matthew

Abstract

A robust computational framework is presented to directly solve for the radiation view factors (Fij) of participatory surfaces within complex three-dimensional geometries. This framework exploits the embarrassingly-parallel nature of the formulation and solution of Fij through a multiple graphics processing units (GPU)-accelerated ray tracing scheme. The presented computational methodology was developed in Java and incorporated Aparapi for OpenCL compatibility. The surfaces of the geometries of interest are constructed via the creation of stereolithography (STL) files, which represent surfaces as tessellations. The shadow effect, where cast rays are obstructed by non-participatory surfaces, is handled via the Möller-Trumbore (MT) ray-triangle intersection algorithm. To ensure generality and robustness, a self-intersection algorithm is implemented for both planar and non-planar surfaces via the MT algorithm with back-face culling enabled. Validation of the algorithm was performed for a variety of three-dimensional geometries. The proposed multi-GPU framework was benchmarked to a conventional computer processing unit (CPU)-based version of the code and exhibited substantial decreases in computational time. Results indicate that near-linear speed-up is achievable with increasing numbers of GPUs. Additionally, a converging solution is obtained with increasing tessellation and GPU count, indicating no perceivable discrepancy in solutions in comparison to CPU and single-GPU based solutions.

Published
2021

2. Cross-cutting principles for planetary health education

Author

Stone, Sara B, Myers, Samuel S, Golden, Christopher D, Molina-Garcia, Alejandro, Quistberg, Alex, More, Alexander, Helfer, Amanda, Mckinney, Amanda, Krzyzek, Amy, Torres, Ana Lauren, Bansal, Ankush, Kurth, Ann, Bolton, Annette, De Lorenzi, Arianna, Boyd, Arthur, Aimone, Ashley, Miheso, Barbara, Chandramohan, Balasubramanyam, Kois, Bethany, Pomerance, Caiti, Loy, Candace, Mullaly, Catherine, Tonne, Cathryn, Becka, Chandra, Ssemugabo, Charles, Sinden, Charles, Margolui, Cheryl, True, Cheryl, Walzer, Chris, Romanelli, Christina, Lowe, Christine, Baeder, Collyn, Howard, Courtney, Lucey, Daniel, Hunter, Danny, Collins, Darin, Crowther, David, Lopez Carr, David, McConville, David, Mena, David, Travis, Dominic, Adams, Ebeneezer, VanWormer, Elizabeth, York, Emily, You, Emily, Falceto de Barros, Enrique, Togami, Eri, Cushing, Erin, Andrade-Rivas, Federico, Boosman, Frank, Wimer, Gabrielle, Meredith, Gen, Kitching, George, Mancus, Gibran, De Leo, Giulio, La Torre, Giuseppe, Edwards, Grace, Hasan, Syed, Cullen, Heidi, Hawkins, Irana, Carter, Jacque, Orbinski, James, Heung, Janette, Coffin, Jeanne, Middleton, Jo, Lindenmayer, Joann, Hallberg, Johan, Patz, Jonathan, Dauernheimer Machado, Julia, Miller, Julia, Miedema, Kaitlyn, Wang, Karen, Burke, Kathy, Richmond, Katie, Durand, Kevin, Fitzpatrick, Kevin, Knowlton, Kim, Murray, Kris, Swamy, Latha, Kahn, Laura H, Peretz, Laurel, Allsopp, Leslie, Friedlander, Leslie, Marushka, Lesya, East, Linda, Grant, Liz, Concordel, Lucie, Masclans, Luisa, Charles-Ayinde, Makyba, Pappaioanou, Marguerite, Shimamoto, Mark, Ashinyo, Mary Eyram, Richards, Mary, Clark, Maynard, Dannheim, Mike, Bimaadziwin, Mino, Rahman, Mofizur, French, Nancy, Aristizabal, Natalia, De Paula, Nicole, Osano, Odipo, Aje-Famuyide, Olufunke, Narwal, Partap, Kinney, Pat, Conrad, Patricia, Furu, Peter, Jutras, Philip, Echaubard, Pierre, Pohl, Rachel, Guggenheim, Ralph, Rodrigo, Reis, Guinto, Renzo, McFarlane, Ro, Alders, Robyn, DeFries, Ruth, Sholts, Sabrina, Lee-Gammage, Samuel, Proesmans, Sam, Watson, Sangeetha, Sokolow, Sanna, Lalonde, Shona, Chakma, Shovon, Boylan, Sinead, Gaith, Smita, Roache, Sonia, Papageorgiou, Sophia, Blondin, Stacy, Rousseau, Stephane, Osofsky, Steven A, Stark, Susan, Clasen, Thomas, Ibrahim, Umar, Rossa-Roccor, Verena, Kurker, Vicki, Navarro, Victoria, Ingole, Vijendra, Harris, Violet, Lavey, Warren, Smith, Woutrina, and Hope, Zachary Miller

Subjects
Health (social science), Earth, Planet, Medicine (miscellaneous), Public Policy, Commission, Environment, Global Health, 03 medical and health sciences, GF075, 0302 clinical medicine, Community of practice, GF051, RA0565, RA0421, Political science, TD0194, Q0181, Humans, 030212 general & internal medicine, Health Education, LB1025, TD0878, 030505 public health, QH0075, Health Policy, Communication, Public Health, Environmental and Occupational Health, Community Participation, R735, L1, Planetary health, Alliance, Socioeconomic Factors, Government, Engineering ethics, LB2361, 0305 other medical science, QH0540, Prejudice
Abstract

Since the 2015 launch of the Rockefeller Foundation Lancet Commission on planetary health,1 an enormous groundswell of interest in planetary health education has emerged across many disciplines, institutions, and geographical regions. Advancing these global efforts in planetary health education will equip the next generation of scholars to address crucial questions in this emerging field and support the development of a community of practice. To provide a foundation for the growing interest and efforts in this field, the Planetary Health Alliance has facilitated the first attempt to create a set of principles for planetary health education that intersect education at all levels, across all scales, and in all regions of the world—ie, a set of cross-cutting principles.

Published
2018
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