• Title/Summary/Keyword: Current Status Concentration

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Setting the Current Air Quality Concentration Using the National Atmosphere Measurement Network

  • CHO, Dong-Myung;LEE, Ju-Yeon;KWON, Lee-Seung;KIM, Su-Hye;KWON, Woo-Taeg
    • Journal of Wellbeing Management and Applied Psychology
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    • v.4 no.3
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    • pp.23-33
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    • 2021
  • Purpose: In the course of the domestic environmental impact assessment, the current status survey was improperly conducted, and the issue of false and inaccurate environmental impact assessment reports has been raised several times recently through media reports. Research design, data and methodology: There is a continuous demand for improvement measures for the current status measurement method, such as having difficulties in securing a normal measurement date in consideration of equipment operation and rainfall days in the field. Results: In addition, in order to grasp the general air quality status of the evaluation target area, it is necessary to check the various current status concentrations by season and time series per year. However, there is a problem that is currently being carried out based on limited results such as measurement for 1 day or 3 days. Conclusions: Therefore, in this study, based on the national atmospheric measurement network, an inverse distance weighted (IDW) interpolation method was applied to calculate the current state concentration. This study suggested a method to use it in preparing the air quality item in the environmental impact assessment report.

Optimization of Odor Concentration by Operation of Small Station Odorizer (공급기지 부취설비 운영에 의한 천연가스 부취 농도 최적화)

  • Lee Seung-Ho;Song Taek-Yong;Baek Young-Soon
    • Journal of the Korean Institute of Gas
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    • v.5 no.3 s.15
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    • pp.36-44
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    • 2001
  • In case of low odor level, accident probabilities are very high Otherwise, when the odorant concentration is too high, the deterioration of pipeline and governor facilities and the environmental problems may occur. Odorants fade in the pipeline and other equipment due to physical and chemical adsorption and reactions with odorant and materials. So, it is very important to maintain odorant concentration properly In this study, the current status of odorization technologies has been reviewed. And the characteristics of small odorant system have been analyzed. In case that the small odorant system Is introduced in our country, this paper is proposed the feasible management plan and showed feasibility results through the analysis of current available technology.

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Current Status of Radon Management in the 5678 Seoul Metropolitan Rapid Transit Subway (5678 서울도시철도 지하역사의 라돈 관리 현황)

  • Kim, Jun-Hyun;Yoon, Hun-Sik;Seo, Kang-Jin;Woo, Hee-Yeong;Kim, Man-Hwa;Park, Jong-Hun
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.1306-1312
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    • 2011
  • Underground Subway station's air pollutants are introduced from the indoor or outdoor. And Radon is a major pollutant in the subway station. Radioactive substances Radon is occuring naturally in granite tunnel wall and underground water. Especially inert gas Radon that causes lung cancer in human is anywhere but 5678 S.M.R.T. tunnels deep and pass through the granite plaque have a lot of Radon. The Radon concentration is determined by the following reasons : radon content of soil and concrete, underground water, ventilation, pressure difference, building structure, temperature, etc. So Radon concentration is hard to predict. And we can't only ventilate owing to era of high oil prices. This study focuses on our efforts for the reduction of Radon concentration. And the purpose is to provide basically datas of specially managed 15 subway station's Radon concentration.

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Serum Lipids by Gender, Age and Lifestyle in Korean Adults (일부 한국성인의 성, 연령 및 생활습관에 따른 혈청지질 농도)

  • 김미경
    • Korean Journal of Community Nutrition
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    • v.5 no.1
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    • pp.109-119
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    • 2000
  • The purpose of this study was to measure serum lipids concentrations by gender and age, and to investigated the relation of serum lipids levels to cigarette smoking alcohol intake exercise and menopausal status in Korean adults. The subjects consisted of 463 healthy adult(29- men and 173 women) volunteers who were visiting the health Promotion Center in the Asan Medical Center from July 1, 1994 to July 22, 1994 Subjects were ambulatory free-living people and aged 20- 80 years, Anthropometric measurement was performed and serum triglyceride(TG), HDL-cholesterol and total cholesterol(TChol) concentrations were measure by automatic system(Hitachi 736-40). Data on life styles were obtained using structured questionnaires issued by a trained interviewer, All data were statistically analyzed by PC-SAS(Version 6.04) Serum concentrations of triglyceride and total cholesterol was higher(p<0.05) in men than in women, and serum HDL-cholesterol was lower(p<0.05) in men than in women. The prevalence of hyperlipidemia(TG>170 mg/dL and TChol>220 mg /dL) was 12.5% in men and 4.1% in women. The levels of serum triglyceride, total cholesterol and BMI increased with age in women. The distribution curves of serum triglyceride, total cholesterol and LDL-cholesterol of women were located in lower increased more rapidly with aging than in men, The distribution curves of BMI of women increased with aging after the thirties, The BMI of women was located in higher levels than of men in their sixties. The serum concentration of triglyceride and total cholesterol of male current-smokers and non- smokers were significantly(p<0.05) higher than those of ex-smokers. The concentrations triglyceride the male current0drinkers were higher(p<0.05) than those of male non-drinkers. In non-smokers and non- drinkers, serum TG concentration were lower (p<0.05) than those of current-smokers and current-drinkers. In exercisers, the serum triglyceride concentration was significantly(p<0.05) lower than in non- exercisers. In postmenopausal woman BMI and serum concentrations of TChol, TG and LDL-Chol were significantly by age and gender and smoking alcohol drinking, exercise and menopausal staus might be a better indicator to predict serum lipids in both genders.

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Current Status of the Research in Fed Batch Culture as an Aspect of General Optimization Problems in Fermentation

  • Choi, Cha-Yong
    • Proceedings of the Korean Society for Applied Microbiology Conference
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    • 1979.10a
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    • pp.242-242
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    • 1979
  • The general efforts of applied research and development can be divided into product development, process development, process design, process equipment design, and operation The fed batch culture as one effort of theprocess development in fermentation industry has been practiced since the early times of human history. One particular industrial application with long history is in the cultivation of the baker's yeast where the glucose effect at relatively high glucose concentration is the general rule.

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A Study on the Financing Decision of Korean Private Hospitals (우리나라 민간병원의 자본조달결정에 관한 연구)

  • Choi, Man-Kyu
    • Korea Journal of Hospital Management
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    • v.7 no.3
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    • pp.25-43
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    • 2002
  • This study focuses on the factors that make the financing decision of private hospitals in Korea. Data used in this study were collected from 98 hospitals with complete general data of current status as well as financial statements. They were chosen from the 138 hospitals that passed the accreditation process by the Korean Hospital Association from 1996 to 2000 for the purpose of accrediting training hospitals. The dependent variables in this study consist of total liabilities to total assets, borrowings to total assets. The independent variables are ownership, hospital type, teaching status, location, bed size, period of establishment, asset structure, profitability, growth, tax shields, volatility of profit, competition(market concentration), and other factors. The major findings of this study are as follows. The factors found to have significant effect on liabilities to total assets are teaching status(-), asset structure(-), profitability(-), tax shields(+), and business risk(-). University hospitals have less liabilities than the non-university hospitals. It was also confirmed that high profitability, high fixed asset, high volatility of profit and low tax shields results in decrease in liabilities. The factors that significantly affect on borrowings to total assets are teaching status(-), period of establishment(-), volatility of profit(-) and competition(+).

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Current status of Jeju special self-governing province's water infrastructure and direction for improvement (제주특별자치도 물인프라 현황 및 개선방향)

  • Kim, Jinkeun
    • Journal of Korean Society of Water and Wastewater
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    • v.35 no.6
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    • pp.497-505
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    • 2021
  • This paper investigates the current status of Jeju special self-governing province (JSSGP)'s water infrastructure and recommends directions for improvement. JSSGP relies on groundwater for most of its water resources. Recently, water usage has been steadily increasing due to the increase of residents and tourists while the quality of groundwater has been steadily worsening. Deterioration in water quality of groundwater can be seen through the increase in concentration of nitrate nitrogen and microorganisms. To overcome such problems, water consumption must be reduced by water demand management in all fields including residential and agricultural water use. The quality of water resources should be preserved through the management of pollutants. For efficient management of water resources, great efforts should be made to reduce the leakage rates in household and agricultural water, which is currently at the highest level in the country. Furthermore, diversification of water intake sources other than groundwater is needed, especially for agricultural water supply. For water and sewerage facilities, compliance with drinking water quality standards and discharge water quality standards must be achieved through the optimization of operation management. This process requires recruiting professionals, improving existing workers' expertise, and improving facilities.

Current Status on Gold Smelting Technology (금제련(金製鍊) 기술(技術)의 현황(現況))

  • Kim, Byung-Su;Kim, Chi-Kwon;Sohn, Jeong-Soo
    • Resources Recycling
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    • v.16 no.3 s.77
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    • pp.3-11
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    • 2007
  • Presently, most of gold is smelted from gold concentrates and anode slimes. Anode slimes are by-products of nonferrous smelters such as lead and copper. In addition, gold is recovered from waste dental and medical materials, waste gold coating solution, and waste printed circuit boards (waste PCBs). The smelting method of gold from gold concentrates and various wastes containing high concentration of gold is largely divided into chlorination, cyanidation, and amalgamation methods. For the anode slimes, electrolysis method is usually used, which largely consists of roasting, high temperature melting and electrolysis processes. Also, various wastes containing low concentration of gold are mainly treated by pyrometallursical processes. In the paper, current status on gold smelting technology is reviewed, and a novel process for gold smelting which is researched in the recent is briefly introduced.

Trends in the Prevalence of Childhood Asthma in Seoul Metropolitan City, Korea: The Seoul Atopy·Asthma-friendly School Project

  • Cho, Yong Min;Kim, Chea-Bong;Yeon, Kyung Nam;Lee, Eun Sun;Kim, KyooSang
    • Journal of Preventive Medicine and Public Health
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    • v.51 no.6
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    • pp.275-280
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    • 2018
  • Objectives: The project Seoul Atopy Asthma-friendly School investigated the current status of childhood asthma to enable formulation of a preventative policy. We evaluated the current prevalence of childhood asthma in Seoul and its trends and related factors. Methods: The project was conducted annually from 2011 to 2016 and involved around 35 000 children aged 1-13 years. Based on the International Study of Asthma and Allergies in Childhood guidelines, the survey involved parents. The associations of the particulate matter ($PM_{10}$) concentration, and the number of days on which the daily air quality guidance level was exceeded in the 25 districts of Seoul, with the prevalence of asthma were assessed. Results: The age-standardized asthma prevalence in 2011 and 2016 was 6.74 and 4.02%, respectively. The prevalence of lifetime asthma treatment and treatment during the last 12 months tended to decrease from 2011 to 2016. Asthma treatment was significantly correlated with the number of days on which the daily air quality guidance level was exceeded, but not with the $PM_{10}$ concentration. Conclusions: This study reports the prevalence of asthma among children in Seoul and confirmed the relationship between childhood asthma and known risk factors in a large-scale survey.