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장봉기,이의선,박종안 순천향대학교 기초과학연구소 2008 순천향자연과학연구 논문집 Vol.14 No.1
This study was to identify the factors affecting the obesity as body mass index by sex, age, lifestyle and health behavior. The subjects for this study were all adult in Choongnam-do and capital region, Korea. The data were collected in November, 2007. The results of this study are as follows. Body mass index (BMI) by sex showed that significantly higher in the male group (23.04±3.5) than in the female group (21.12±2.7) (p<0.01). BMI by age showed that significantly increased according to older group (p<0.01). BMI by exercise showed that significantly higher in does not the exercise group than in the exercise group for male group (p<0.05). BMI by kind of exercise showed that significantly higher in ball game exercise group than in aerobic exercise group for female group (p<0.05). BMI by meal frequency per day showed that significantly higher in 3 times and more group than the 2 times and below group for female group (p<0.05). BMI by speed of eating showed that significantly higher in fast group than the slow group for male group (p<0.05). Generally, a person who drink show that higher BMI. BMI showed that significantly higher in parents is obesity group than the normal parents group (p<0.05).
폐금속 광산지역 토양 중 중금속 농도와 주민의 혈액 및 요중 중금속 농도와의 관련성
장봉기,박상일,김남수,정경식,이병국,이종화,Jang, Bong-Ki,Park, Sang-Il,Kim, Nam-Soo,Jung, Kyung-Sick,Lee, Byung-Kook,Lee, Jong-Wha 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.5
Objectives: This study was conducted in order to examine the relationship between heavy metal concentrations in the soil and the level of heavy metals in the blood or urine of 216 local residents living near abandoned metal mines. Methods: Residents around abandoned metal mines were interviewed about their dietary habits, including seafood consumption, medical history, cigarette smoking, and drug history. Metal concentrations in the soil were determined by atomic absorption spectrophotometer (AA-7000, Shimadzu, Japan). Lead (Pb) and cadmium (Cd) contents in the blood or urine were analyzed by GF-AAS (AA-6800, Shimadzu). Mercury (Hg) contents in the blood were determined by means of a mercury analyzer (SP-3DS, NIC). Arsenic (As) content in the soil and urine were measured by a HG-AAS (hydride vapor generation-atomic absorption spectrophotometer). Results: The heavy metal concentrations in the soil showed a log normal distribution and the geometric means of the four villages were 8.61 mg/kg for Pb, 0.19 mg/kg for Cd, 1.81 mg/kg for As and 0.035 mg/kg for Hg. The heavy metal levels of the 216 local residents showed a regular distribution for Pb, Cd, Hg in the blood and As in the urine. The arithmetic means were 3.37 ${\mu}g$/dl for Pb, 3.07 ${\mu}g$/l for Cd and 2.32 ${\mu}g$/l for Hg, 10.41 ${\mu}g$/l for As, respectively. Conclusions: As a result of multi-variate analysis for the affecting factors on the bodily heavy metal concentrations, gender and concentration in the soil (each, p<0.01) for blood lead levels; gender and smoking status (each, p<0.01) for blood cadmium levels; gender (p<0.01) for urine arsenic levels; gender, age and concentration in the soil (p<0.01) for blood mercury levels were shown to be the affecting factors.
한국과 아시아 4개국에 글로벌 기업 진출을 위한 산업안전보건에 관한 근로자 보호규정 비교
장봉기,이연우,김기범,이현중,박경애,박정임,오정용,이종화 순천향대학교 기초과학연구소 2017 순천향자연과학연구 논문집 Vol.23 No.1
We compared Korea with the four Asian countries (China, Thailand, Vietnam and Philippines) on five parts of regulations of occupational safety and health: regulations for employee protection, measurement of working environments, occupational health care, occupational diseases, and punishment. The main subjects of measuring the working environment of the five Asian countries, including South Korea, was the same as the employer, but there were slight differences in measurement timing, but at least once every year. In the case of the qualification of the work environment, the general public shall not be allowed to perform and obtain permission from the departments and heads of the departments and agencies of each country. In the report, South Korea, China, Thailand and Vietnam should report the results of measurement to the designated institutions in each country, but in the Philippines, there is obligation to measure the work environment, but there is no obligation to report. In the four countries excluding Thailand, it is stated that the medical institution needs to undergo a medical checkup, which stipulates that the medical institution carries out a medical checkup for the workers in accordance with the law. In the case of working hours, it is possible to see that all five countries’ working hours are similar or equal. Female workers in all the five countries can have the maternity leave and menstruation leave. In Vietnam, there are slightly more detailed welfare regulations for female workers than other four countries country.
인공 연못의 부영양화 원인 및 저감대책 : - 현충사 경내 연못을 중심으로 -
장봉기,권용순,박종안,이종화,허준무 순천향대학교 기초과학연구소 2001 순천향자연과학연구 논문집 Vol.7 No.1
The field investigation including survey of water quality and sediment was conducted to evaluate trophic level and to find out appropriate control measures of artificially eutrophicated pond. The pond is located in the Hyunchoongsa, Asan, and has been a major water quality problem which has received considerable attention over the last decades because of accelerated aging of pond waters may be resulting from elevated loading of nutrients. Comprehensive survey of water quality and bottom sediment was carried out for one year to find out history of general characteristics, from November 1999 to July 2000. Average concentration of total nitrogen and phosphorus in the pond water was 25.43mg/ℓ and 0.2mg/ℓ respectively, and other characteristics showed higher trophic level. Chlorophyll-a concentration was 24.43mg/ℓ, and major group of algae was green algae of Closterim, which occupied 97.7%. The eutrophication rate index of one-year average was 70.91, and this level meant the pond was severe eutrophication state. Higher concentration of nutrient was detected in sediment of the pond, which was 2,717.06mg/ℓ and 83.20mg/ℓ, and these estimated values also meant extreme eutrophication state of the pond. Inflowing water quality was also monitored to find out the nutrient source. Results showed that inflowing water was not good for the supplying water for the pond since Total nitrogen and phosphorus concentration of inflowing water were 28.87mg/ℓ and 0.25mg/ℓ, respectively, and these nutrient concentrations were very high leading to algae bloom of the pond. Therefore it was concluded that supply of clean water is good for remedial actions to the pond, and flushing is a appropriate measures to control this eutrophicated pond. Simulation using modified simple model showed the trophic level of the pond will be change to water quality level of lake and pond I after clean water supply of 356m3/day for sixty-days.
QFD 및 Stage-gate 모델을 활용한 국방분야 개발단계 품질관리 방안 연구
장봉기 한국품질경영학회 2014 품질경영학회지 Vol.42 No.3
Purpose: The purpose of this study is to propose adoption of QFD and Stage-gate in order to analyze the quality of korea defense system. Methods: Drawing change data of initial production phase in korea defense system were anlayzed and a practical method was proposed. Results: The results of this study are as follows; Off line Quality Control should be introduced in development phase. Specially, in case of defense system, the best method is QFD(Quality Function Deployment) and Stage-gate process. At first, QFD 1 step defines product planning from VOC(Voice Of Customer), QFD 2 step specifies part planning from product planning, QFD 3 step defines process planning from part planning,QFD 4 step defines production planning from previous process planning. Secondly, Stage-gate process is adopted. This study is proposed 5 stage-gate in case of korea defense development. Gate 1 is located after SFR(System Function Review), Gate 2 is located after PDR(Preliminary Design Review), Gate 3 is located after CDR(Critical Design Review), Gate 4 is located after TRR(Test Readiness Review) and Gate 5 is located before specification documentation submission. Conclusion: Off line QC(Quality Control) in development phase is necessary prior to on line QC(Quality Control) in production phase. F or t he purpose o f off line quality control, QFD(Quality Function Deployment) and Stage-gate process can be adopted.