Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Chang-Jin Ma"'
Autor:
Chang-Jin Ma, Gong-Unn Kang
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 16, Iss 1, Pp 1-7 (2023)
Abstract A thick foggy weather and worst visibility in Fukuoka, Japan and Busan, South Korea occurred from the late July to early August 2020 due to the Nishinoshima volcanic eruption. In this study, an intensive measurement was made to clarify the c
Externí odkaz:
https://doaj.org/article/584a81721b19456abab52fa02241c0f9
Autor:
Chang-Jin Ma, Gong-Unn Kang
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 16, Iss 3, Pp 1-9 (2022)
Abstract This study aims to assess the particulate matter (PM1, PM2.5, PM10) and black carbon (BC) in the Korea Train eXpress (KTX) cabin during train running, and the personal exposure of PM2.5 for the female/male passengers who use the KTX 20 days
Externí odkaz:
https://doaj.org/article/212d30dc719a4968aaab5d7cc3f45359
Autor:
Chang-Jin Ma, Gong-Unn Kang
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 14, Iss 3, Pp 253-262 (2020)
Coronavirus disease 2019 (COVID-19), first reported in Wuhan, China, became pandemic in less than two months, and Korea was no exception. Daegu Metropolitan City, in particular, has become the center of the explosive outbreak in Korea. In this study,
Externí odkaz:
https://doaj.org/article/635b5699c337424084e0765ad6535ee8
Autor:
Chang-Jin Ma, Gong-Unn Kang
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 14, Iss 2, Pp 146-154 (2020)
The current study aims to characterize the PM2.5 and the equivalent black carbon (eBC) inside/outside vehicles (hereafter called “in/out-cabin”) and near roadway, and to estimate their personal exposure to the driver himself as well as the school
Externí odkaz:
https://doaj.org/article/67f58dfd24ae4bf6992b508c6aee816b
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 14, Iss 4, Pp 335-344 (2020)
In order to provide a better knowledge of visibility degradation during the PM2.5 event day (episodic high PM2.5 level, hereafter called as “event day”), the relationship between visibility and the chemical species of PM2.5 measured in Gwangju, K
Externí odkaz:
https://doaj.org/article/2a92ea4a38a34e4da507c039cb487565
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 13, Iss 4, Pp 240-248 (2019)
It is meaningful to estimate the chalk dust behavior and its exposure for school-aged children and teachers who spend a lot of time in the classroom. In the present study, model classes were designed to characterize temporal and spatial variations of
Externí odkaz:
https://doaj.org/article/2ab689e3140c489fb1f4cc1d65030e22
Autor:
Chang-Jin Ma
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 13, Iss 2, Pp 99-105 (2019)
Although it is well known that nasal hair keeps particles from entering our body, its quantitative evaluation has not been done. In this study, the particle blocking efficiency by nasal hair was studied both experimentally and numerically. The result
Externí odkaz:
https://doaj.org/article/1bd62264c0784877829636294a4dcd12
Autor:
Chang-Jin Ma, Gong-Unn Kang
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 13, Iss 2, Pp 136-143 (2019)
It is crucial for understanding the characteristics of fly ash, emitted from the incinerator of municipal solid waste, to properly diagnose its impact on air quality and human health. In this study, to precisely describe the chemical property of the
Externí odkaz:
https://doaj.org/article/f6908f0c40d4436b8c2ccf4a192d4c5d
Autor:
Chang-Jin Ma, Koichiro Sera
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 11, Iss 3, Pp 176-183 (2017)
Although it is well known that rain plays an important role in capturing air pollutants, its quantitative evaluation has not been done enough. In this study, the effect of raindrop size on pollutant scavenging was investigated by clarifying the chemi
Externí odkaz:
https://doaj.org/article/dc84151222784e40ab1dc16b03e05689
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 11, Iss 2, Pp 122-130 (2017)
The main purpose of the study was to clarify the properties of individual particles collected at each behavior space of a factory worker. The samplings of size-segregated (PM2.1-1.1 and PM4.7-3.3) indoor particles were conducted at three different be
Externí odkaz:
https://doaj.org/article/c5836f221d0c4eaeba7aed6d0e0bde0f