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5. Application of Deep Learning to Solar and Space Weather Data

Author

Moon, Yong-Jae, primary, Lee, Harim, additional, Son, Jihyeon, additional, Sung, Suk-Kyung, additional, Yi, Kangwoo, additional, Jeong, Hyun-Jin, additional, Park, Eunsu, additional, Ji, Eun-Young, additional, Cho, Il-Hyun, additional, Lawrance, Bendict, additional, Lim, Daye, additional, Shin, Gyungin, additional, Lee, Sujin, additional, Rahman, Sumiaya, additional, and Kim, Taeyoung, additional

Published
2022
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9. Comparison of Dst Forecast Models for Intense Geomagnetic Storms

Author

Ji, Eun-Young, Moon, Y.-J, Gopalswamy, N, and Lee, D.-H

Subjects
Geophysics, Meteorology And Climatology
Abstract

We have compared six disturbance storm time (Dst) forecast models using 63 intense geomagnetic storms (Dst <=100 nT) that occurred from 1998 to 2006. For comparison, we estimated linear correlation coefficients and RMS errors between the observed Dst data and the predicted Dst during the geomagnetic storm period as well as the difference of the value of minimum Dst (Delta Dst(sub min)) and the difference in the absolute value of Dst minimum time (Delta t(sub Dst)) between the observed and the predicted. As a result, we found that the model by Temerin and Li gives the best prediction for all parameters when all 63 events are considered. The model gives the average values: the linear correlation coefficient of 0.94, the RMS error of 14.8 nT, the Delta Dst(sub min) of 7.7 nT, and the absolute value of Delta t(sub Dst) of 1.5 hour. For further comparison, we classified the storm events into two groups according to the magnitude of Dst. We found that the model of Temerin and Lee is better than the other models for the events having 100 <= Dst < 200 nT, and three recent models (the model of Wang et al., the model of Temerin and Li, and the model of Boynton et al.) are better than the other three models for the events having Dst <= 200 nT.

Published
2012
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13. Multiple Stent Fractures After Everolimus-Eluting Stent Implantation Causing Acute Myocardial Infarction

Author

Ji, Eun Young, Park, Gyung-Min, Kim, Dae Won, Kim, Tae-Seok, Kim, Chan Joon, Cho, Jung Sun, Park, Mahn-Won, and Her, Sung Ho

Subjects
Adult, Male, Myocardial Infarction, Drug-Eluting Stents, equipment and supplies, Prosthesis Failure, surgical procedures, operative, Humans, cardiovascular diseases, Clinical Case Report, Everolimus, Immunosuppressive Agents, Research Article
Abstract

Stent fracture is an uncommon complication of drug-eluting stent implantation, but it has a clinical significance because of its potential association with adverse cardiac events such as in-stent restenosis, target lesion revascularization, and stent thrombosis. Multiple stent fractures account for a small proportion, but they may lead to more serious complications. Newer generation drug-eluting stents are designed for improved safety and efficacy compared with early generation drug-eluting stents. Multiple stent fractures after newer generation drug-eluting stent implantation are a rare case. We report a case of 25-year-old male who presented with acute myocardial infarction caused by multiple stent fractures after everolimus-eluting stents implantation and was treated by balloon angioplasty. Physicians should be aware of the possibility of multiple stent fractures even after newer generation drug-eluting stent implantation.

Published
2016

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