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4. Quantitative predictions of photo-emission dynamics in metal halide perovskites via machine learning

Author

Howard, John M., Wang, Qiong, Lee, Erica, Lahoti, Richa, Gong, Tao, Srivastava, Meghna, Abate, Antonio, and Leite, Marina S.

Subjects
Condensed Matter - Materials Science, Physics - Applied Physics
Abstract

Metal halide perovskite (MHP) optoelectronics may become a viable alternative to standard Si-based technologies, but the current lack of long-term stability precludes their commercial adoption. Exposure to standard operational stressors (light, temperature, bias, oxygen, and water) often instigate optical and electronic dynamics, calling for a systematic investigation into MHP photophysical processes and the development of quantitative models for their prediction. We resolve the moisture-driven light emission dynamics for both methylammonium lead tribromide and triiodide thin films as a function of relative humidity (rH). With the humidity and photoluminescence time series, we train recurrent neural networks and establish their ability to quantitatively predict the path of future light emission with <11% error over 12 hours. Together, our in situ rH-PL measurements and machine learning forecasting models provide a framework for the rational design of future stable perovskite devices and, thus, a faster transition towards commercial applications.

Published
2020

5. Doing research in federal communications law

Author

Howard, John M.

Subjects
Bibliographies., Telecommunication -- Law and legislation -- Legal research. -- United States, Broadcasting -- Law and legislation -- Legal research. -- United States, Mass media -- Law and legislation -- Legal research. -- United States
Published
1981

22. Efficacy of a 3-Hour Aboriginal Health Teaching in the Medical Curriculum: Are We Changing Student Knowledge and Attitudes?

Author

Zhou, Alysia W., Boshart, Samantha, Seelisch, Jennifer, Eshaghian, Reza, McLeod, Ryan, Nisker, Jeff, Richmond, Chantelle A. M., and Howard, John M.

Abstract

There is national recognition of the need to incorporate Aboriginal health issues within the medical school curricula. This study aims to evaluate changes in medical students' knowledge and attitudes about Aboriginal health, and their preparedness to work in Aboriginal communities after attending a 3-hour Aboriginal health seminar. A cross-sectional survey was administered before and after the seminar for Year 1 and 2 medical students at the University of Western Ontario. The survey included four true or false questions and 24 questions using a seven-point Likert scale (1--strongly disagree, 7--strongly agree). Eighty two of 130 (64 per cent) Year 1 students and 55 of 86 (63 per cent) Year 2 students completed both questionnaires. Knowledge-based questions were answered correctly by most students before the seminar, with an increasing number of correct responses noted after the seminar (p less than 0.05). Students' perceptions about sociocultural and economic factors affecting health showed uncertainty before the seminar, but changed towards greater agreement regarding its impact on health after the seminar (p less than 0.05). Students initially felt unprepared to care for Aboriginal patients before the seminar, but felt more prepared after the seminar (p less than 0.05). A 3-hour seminar using both didactic and non-traditional teaching methods appears to be effective in the short term in improving knowledge, changing attitudes and reversing some of the uncertainties medical students have about practicing in Aboriginal communities. (Contains 2 tables.)

Published
2012
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26. Pancreatic Cancer

Author

Dobelbower, Ralph R., Jr., Wagner, Steven M., Fadell, Ronald J., Howard, John M., DiDio, Liberto J. A., and Dobelbower, Ralph R., Jr., editor

Published
1990
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38. A comparison of omeprazole with ranitidine for ulcers associated with nonsteroidal antiinflammatory drugs

Author

Yeomans, Neville D., Tulassay, Zsolt, Juhasz, Laszlo, Racz, Istvan, Howard, John M., Van Rensburg, Christoffel J., Swannell, Anthony J., and Hawkey, Christopher J.

Subjects
Peptic ulcer -- Drug therapy, Omeprazole -- Evaluation, Ranitidine -- Evaluation, Nonsteroidal anti-inflammatory drugs -- Adverse and side effects
Abstract

The antiulcer drug omeprazole appears to be more effective than ranitidine in treating ulcers in people on non-steroidal anti-inflammatory drugs (NSAIDs). Researchers randomly assigned 541 patients taking NSAIDs to 20 or 40 milligrams of omeprazole or 300 milligrams of ranitidine every day. Patients who responded to either drug continued to take it. About 80% of the patients taking omeprazole were successfully treated, compared to 63% of those taking ranitidine. Omeprazole was also more effective than ranitidine during long-term use.

Published
1998

41. Investigational strategies for detection and intervention in early-stage pancreatic cancer: A meeting organized by national cancer institute, organ systems program, division of cancer biology, diagnosis, and centers, April 24–27, Annapolis, MD

Author

Longnecker, Daniel S., Pour, Parviz M., Scarpelli, Dante G., Caldas, Carlos, Redston, Mark S., Hahn, Stephan A., Seymour, Albert B., Hruban, Ralph H., Yeo, Charles J., Kern, Scott E., Ruggeri, B. A., Klein-Szanto, A. J. P., Huang, L. -Y., Lang, D., Andr’en-Sandberg, Åke, Johansson, Bertil, Sandgren, Eric P., Klöppel, Günter, Longnecker, Daniel S., Ghadirian, P., Howe, G. R., Howard, John M., Lynch, Henry T., Fusaro, LaVonne, Fusaro, Ramon, Lynch, Jane, Smyrk, Thomas, Andr’en-Sandberg, Åke, Fusaro, Ramon M., Lynch, Henry T., Günter Klöppel, Rao, M. Sambasiva, Reddy, Janardan K., Albores-Saavedra, Jorge, Milchgrub, Sara, Donald E. Henson, Klimstra, David S., Hameed, Meera R., Marrero, Arturo M., Conlon, Kevin C., Brennan, Murray F., Warshaw, Andrew L., Adrian, Thomas E., Herrnanek, P., Wittekind, Ch., Altendorf-Hofmann, A., Reber, Howard A., Korc, Murray, Vezeridis, Michael P., Bold, Richard J., Evers, B. Mark, Sperling, Howard E., Gomez, Guillermo, Ishizuka, Jin, Townsend, Courtney M., Thompson, James C., Kalthoff, H., Röder, C., Henne-Bruns, D., Kremer, B., Schmiegel, W., Smith, Jill Palmer, Zagon, Ian S., Schally, A. V., Szepeshazi, K., Qin, Y., Halmos, G., Ertl, T., Groot, K., Cai, R. -Z., Liebow, C., Poston, G. J., Lemoine, Nick, Beauchamp, Dan, Warshaw, Andrew L., Kim, Young S., Ho, Jenny J. L., Hollingsworth, Michael A., Juhl, Hartmut, Schott, Astrid, Krüger, Uwe, Henne-Bruns, Doris, Kremer, Bernd, Kalthoff, Holger, Lightdale, Charles J., Korc, Murray, Liebow, Charles, Adrian, Thomas E., Permert, Johan, Westermark, Gunilla T., Lehman, Glen A., Schally, A. V., Nagy, A., Cai, R. -Z., Reile, H., Radulovic, S., Qin, Y., Szepeshazi, K., Halmos, G., Comaru-Schally, Ana Maria, Sorenson, G. D., Pribish, D. M., Valone, F. H., Memoli, V. A., Bzik, D. J., Yao, S.-L, Scarpelli, Dante G., Mangold, K. A., Chang, K-W, Laconi, S., Hubchak, S., Szepeshazi, Karoly, Schally, Andrew V., Halmos, G., Longnecker, Daniel S., Pour, Parviz M., Frazier, Marsha L., Fernandez, Ester, de Llorens, Rafael, Löhr, Matthias, Trautmann, Birgit, Heller, Thomas, Peters, Stefanie, Maier, Anja, Schutt, Hans J., Zauner, Ira, Liebe, Stefan, Tsuei, B. J., Povoski, S. P., Zhou, W., Bell, R. H., Dobelbower, Ralph R., Casper, Ephraim S., Smith, Jill P., Liu, Guozhen, Stock, Elizabeth, Orenberg, Elaine K., Yu, Ning Y., Brown, Dennis M., Tempero, Margaret, Colcher, David, Hermanek, P., Gall, F. P., Wittekind, Ch., Altendorf-Hofmann, A., Charks Liebow, Bell, Richard H., Frazier, Marsha L., Hollingsworth, Michael A., Tempero, Margaret, and Comaru-Schally, Ana Maria

Published
1994
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