Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Il Hyun Cho"'
Autor:
Il-Hyun Cho, Yong-Jae Moon, Jin-Yi Lee, Junmo An, Dae Jung Yu, Kyung-Suk Cho, Harim Lee, Jae-Ok Lee
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 128 (2024)
We study properties of intensity disturbances along polar coronal rays that are associated with plumes below. For this, we draw azimuth–time images of extreme ultraviolet (EUV) emission of 171 Å band observed by the SDO/AIA and white light (WL) ob
Externí odkaz:
https://doaj.org/article/2ed3512be01e4ce191063a3abc436e49
Autor:
Kyung-Suk Cho, Pankaj Kumar, Il-Hyun Cho, Maria S. Madjarska, Valery M. Nakariakov, Eun-Kyung Lim, Wenda Cao, Vasyl Yurchyshyn, Xu Yang, Sung-Hong Park
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 69 (2023)
Plumes are bright structures in coronal holes extending from the solar surface into the corona and are considered as a possible source of the solar wind. Plumes are thought to be rooted in strong unipolar photospheric flux patches (network/plage regi
Externí odkaz:
https://doaj.org/article/eb18351f34e446debf5ee3b7a04828c9
Autor:
Eunsu Park, Harim Lee, Yong-Jae Moon, Jin-Yi Lee, Il-Hyun Cho, Kyoung-Sun Lee, Daye Lim, Hyun-Jin Jeong, Jae-Ok Lee
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 264, Iss 2, p 33 (2023)
In this study, we suggest a pixel-to-pixel image translation method among similar types of filtergrams such as solar extreme-ultraviolet (EUV) images. For this, we consider a deep-learning model based on a fully connected network in which all pixels
Externí odkaz:
https://doaj.org/article/5c4ccf45e50a45abbe9bcf63423a369d
Publikováno v:
Journal of Environmental Policy and Administration. 30:237-261
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a327fbbf10177bc57b66bcd53612725
https://doi.org/10.15301/jepa.2022.30.4.237
https://doi.org/10.15301/jepa.2022.30.4.237
Autor:
Il Hyun Cho
Publikováno v:
Asian Perspective. 46:343-375
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35e780fc25472c4d22940b579a6ea7a0
https://doi.org/10.1353/apr.2022.0014
https://doi.org/10.1353/apr.2022.0014
Autor:
Il Hyun Cho
Publikováno v:
The Pacific Review. 35:32-58
After the Fukushima nuclear meltdown, the Angela Merkel government in Germany officially announced its decision to permanently shut down all of its seventeen nuclear reactors. In closer proximity t...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9108317f05cc660ea30a4dd82dd45c4e
https://doi.org/10.1080/09512748.2020.1806341
https://doi.org/10.1080/09512748.2020.1806341
Autor:
Il-Hyun Cho, Heon-Young Chang
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 28, Iss 1, Pp 1-7 (2011)
Characteristics of latitude variations of sunspots in the northern and southern hemispheres are investigated using the daily sunspot area and its latitude during the period from 1874 to 2009. Solar magnetic activity is portrayed in the form of suns
Externí odkaz:
https://doaj.org/article/16dac3de49b9498eb53d83ce6aeec6ec
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 27, Iss 4, Pp 319-327 (2010)
We examine the ionospheric F2-layer electron density variation by solar activity in middle latitude by using foF2 observed at the Kokubunji ionosonde station in Japan for the period from 1997 to 2008. The semi-annual variation of foF2 shows obvious
Externí odkaz:
https://doaj.org/article/069a9ebd9a274affb7a11bf5d2625dae
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 27, Iss 1, Pp 43-54 (2010)
This study was performed by the policy research project of Ministry of Land, Transport and Maritime Affairs, which title is “Developing safety standards and management of space radiation on the polar route”. In this research, total six experime
Externí odkaz:
https://doaj.org/article/0ade5b40f5cb43a7b8ddb50bbc118d80
Autor:
Jaejin Lee, Junga Hwang, Su-Chan Bong, Ho-Sung Choi, Il-Hyun Cho, Kyung-Suk Cho, Young-Deuk Park
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 26, Iss 4, Pp 521-528 (2009)
While it is well known that space environment can produce spacecraft anomaly, defining space environment effects for each anomalies is difficult. This is caused by the fact that spacecraft anomaly shows various symptoms and reproducing it is impossib
Externí odkaz:
https://doaj.org/article/2bc4911d0fad43a7be3ba98f62d539ea