• Title/Summary/Keyword: Hwang-to

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Application of Linear Dynamics to Salt Finger Favorable Flows (선형이론의 이중확산 유체의 적응)

  • Hwang, Jin-Hwan
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.10 no.1
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    • pp.53-58
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    • 2007

  • In an estuary, mixing and transport of contaminant sometimes occurs in the salt finger favorable condition (Hwang ang Rehmann, 2004). Linearized theory is applied to predict flow dynamics in salt finger favorable condition. The simulated results match well with previous laboratory experiments. When the density ratio is larger than 2, the heat and salt system shows $0.55{\sim}0.57$ as Turner (1967) found, and the salt and sugar system produces 0.87 of Griffiths (1980). As the ratio of molecular diffusivities of two scalars increases, the flux ratio increases. The flux and eddy diffusivity ratios decrease with increase of density ratio, and it takes longer time for flux ratio to be steady state at the higher density ratios.

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A Study on the Relationship between Foreign Direct Investment and the Absorptive Capacity of a Host Country Using Panel Threshold Regression (패널문턱회귀를 활용한 외국인 직접투자와 현지국 흡수능력의 관계 연구)

  • Cao, Thu Trang;Ji-Young Hwang;Yun-Seop Hwang;Cheon Yu
    • Korea Trade Review
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    • v.47 no.4
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    • pp.89-102
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    • 2022

  • This study is designed to investigate the effect of inflow FDI on the host country's economic growth and the role of absorptive capacity in this relationship. Eight developing countries in East Asia, including Mongolia, Indonesia, Malaysia, Myanmar, the Philippines, Thailand, Vietnam, and Cambodia, are analyzed. Year data from 2000 to 2018 are used. Based on the study of Hansen (1999), the panel threshold effect model is used, and human capital, R&D, and infrastructure are set as absorptive capacity by referring to Wang and Hwang (2013). The analysis results are as follows. It is confirmed that FDI has a positive effect on the economic growth of the host country, and absorption capacity strengthens the relationship between FDI and economic growth in a positive direction. At this time, it appears that a threshold exists for the moderating effect of the absorptive capacity. It presents useful implications for economic growth in developing countries.

  • https://doi.org/10.22659/KTRA.2022.47.4.89 인용 PDF

The comparative analysis on escaping time for fire escape design (피난설계 예시도면 작성을 통한 피난소요 시간 비교.분석 연구)

  • Kim, Dae-Hee;Hwang, Eun-Kyoung;Jo, Jung-Hun;Hwang, Keum-Suk
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2008.04a
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    • pp.261-264
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    • 2008

  • A guideline to complement safety problem of escape code at the fire controlling design stage was shown by comparing & analysing developed fire controlling countries such as US, UK, Japan, and etc. and appropriateness of improving legislations for building standard of escape code was examined by comparing & analysing escaping time with escape code simulation(SIMULEX, EXDOUS) as the guideline.

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Types and Symptoms of Sa-Hwang-San through Analysis of Clinical Cases (사황산(瀉黃散) 형증(形證)에 대한 문헌 및 임상적 고찰)

  • Kim, Jong-Won;Kang, Kyung-Hwa;Ji, Gyu-Yong;Kim, Kyung-Chul;Lee, In-Sun;Cho, Jang-Su;Lee, Yong-Tae
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.22 no.5
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    • pp.1106-1111
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    • 2008

  • Sa-Hwang-San, which is invented by Jhun Eul for the treatment of tongue thrust of Spleen heat, is first mentioned on 'So Ah Yak Jeung Jik Gyul'. It is consisted of Gardeniae Fructus, Agastache rugosa, Glycyrrhizae Radix, Gypsum Fibrosum, Ledebouriellae Radix. According to 'Dong Ui Bo Gam', this medicine cures spleen heat, sore mouth and halitosis. In the viewpoint of pharmacology, this medicine as a whole can treat spleen stagnancy, spleen heat and stomach heat. However, there are some differences between the opinions of 'So Ah Yak Jeung Jik Gyul' and 'Dong Ui Bo Gam' the principal medicine of the former is Ledebouriellae Radix, while that of the latter is Gardeniae Fructus. Spleen stagnancy is the malfunction of spleen under the presence of the body fluid. Symptoms are abdominal dropsy and powerlessness. Spleen heat is the insufficiency of body fluid due to the heat of the spleen, while the function of the spleen is normal. Symptoms are sore mouth, halitosis and maxillary stagnancy. In clinical cases, Sa-Hwang-San has been found effective to the individuals with large, lowered, soft, and slanted mouths and lips. It was also beneficial for the YangMyong type. In clinical cases, Sa-Hwang-San is proven to be effective to the following symptoms soremouth, halitosis and maxillary stagnancy due to spleen heat abdominal dropsy and powerlessness due to spleen stagnancy.

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