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윤중수 ( Joong-soo Yoon ),이상우 ( Sang-woo Lee ),최종문 ( Jong-moon Choi ) 한국환경분석학회 2018 환경분석과 독성보건 Vol.21 No.3
Reinforced plastics containing waste polypropylene, waste coal, and fly ash were manufactured, and the usefulness of reinforcing agents such as waste coal and fly ash was investigated from the physical properties of the manufactured reinforced plastics. The physical properties (tensile strength, tensile elongation, flexural strength, impact strength, and hardness) of the manufactured reinforced plastic using waste coal or fly ash as the reinforcing agent were superior to those of general particle-reinforced plastics but inferior to those of fiberreinforced plastics. When increasing amounts of reinforcing agents were added, the physical properties of the reinforced plastic increased proportionally. In general, the efficiency of fly ash as a reinforcing agent is better than that of coal waste. Using a combination of the two reinforcing agents, improved the physical properties of reinforced plastic compared to those of the individual agents because of the homogeneity of the mixture. Because coal waste and fly ash may contain various harmful ingredients, their elution will be of concern in long term. However, harmful components such as cadmium, chromium, mercury, lead, and organic bromine were not detected in these wastes. The manufactured reinforced plastics investigated in this work may be used to replace the concrete rain storage systems, which have a high construction cost, weak shock-resistance, and are difficult to manage. Moreover environmental problems due to waste coal and fly ash can be minimized if they are reused as reinforcing agents.
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Jung-Hyun Kim(김정현),Joong-Soo Yoon(윤중수) 한국콘텐츠학회 2015 한국콘텐츠학회논문지 Vol.15 No.10
본 연구는 대학생의 헌혈지식, 헌혈인식, 헌혈태도간의 관련성을 살펴보고, 헌혈 촉진 및 저해 요인을 파악하여 헌혈 참여 확대 방안을 모색하는 것이다. 자료는 2014년 12월 8일부터 12일까지 국내 두 개 대학교의 보건계열 20대 대학생 272명을 대상으로 헌혈지식, 헌혈인식, 헌혈경험에 관한 구조화된 자기기입식 설문지를 이용하여 수집되었다. 분석방법은 Pearson correlation test, t-test, descriptive statistics를 실시하였다. 주요 연구결과는 다음과 같다. 첫째, 현혈인식이 긍정적일수록 헌혈횟수가 증가하는 것으로 나타났다(P <.05). 둘째, 보건계열 전공생과 비보건계열 전공생 집단 간 헌혈지식(P<.01)과 헌혈인식(P<.05)에 차이가 있었다. 셋째, 헌혈경험자가 헌혈비경험자에 비해 헌혈 참여의도가 높았다(P<.01). 분석 결과를 토대로 20대 대학생의 헌혈을 장려하기 위해서는 미디어 홍보를 통한 헌혈인식 개선과 헌혈에 대한 보상을 강화하는 방법이 효과적일 것이라 제언한다. The present study aims to investigate the association between knowledge, attitude, and practice of blood donating in an effort to increase the participation rate of blood donation among university students. Data was obtained among 272 in theirs 20s health sciences students in two university of South Korea through self-reported questionnaires including Knowledge, attitude, and behavioral practice regarding blood donation during 8st December 2014 to 12st December 2014. Pearson correlation test, student’s t-test or descriptive statistics were performed for the data analysis. The results were as follows: 1) There was positive significant relationship between Attitude and behavioral practice towards blood donation(P <.05). 2) There was significant difference in the knowledge(P<.01) and attitude(P<.05) regarding blood donation according to public health vs non-public health. 3) The participants with previous blood donation experiences showed a higher participation rate than those without such an experience(P<.01). It is important not only to improve the university student’s attitude towards blood donation through media advertising but also to reinforce the compensation offered to donors.
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이상우 ( Sang-woo Lee ),이호준 ( Ho-joon Lee ),윤중수 ( Joong-soo Yoon ),최종문 ( Jong-moon Choi ) 한국환경분석학회 2017 환경분석과 독성보건 Vol.20 No.3
The reinforced plastics to make unit cell as rain storage tank were prepared with waste thermoplastics such as poly ethylene, poly propylene and reinforcing agents. The physical properties such as the strength of tensile, elongation, flexural, impact, hardness and strain of the prepared plastics were investigated. For this purpose, the inorganic reinforcing agents such as talc, calcium carbonate, glass fiber and mixing agent which were blended by them were added to thermoplastics(PE/PP) in order to the reinforced plastics. At this time, the hydrophilic inorganic reinforcing agents were reformed to have the hydrophobic property because they didn't mix each other. The physical properties of a prepared reinforced plastic were varied according to the types and adding amounts of the reinforcing agents. That is, the properties of reinforced plastics such as tensile, flexural, impact, hardness and strain strengths were increased along adding reinforcing agents while its elongation strength was decreased. The physical property of fiber type reinforced plastics was higher than that of particle type if a single reinforcing agent use. However, the physical property of composite reinforced plastic was the highest among them due to add particle and glass fiber characters. The plastic in this work didn't distort in compressive strength test for short and long term load according to underground buried. From the results, the plastic in this work could be used for rain storage unit cell which was reported from previous work.
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尹重洙,李時伯 서울大學校保健大學院 1995 國民保健硏究所硏究論叢 Vol.5 No.2
Recently, the National Health Insurance Scheme has been improved. The fertility rate has been slowed down while life expectancy is constantly increasing. It is significant to study on children mortality which is improtant for the development of the national and provied the basis of policy establishment. This study is intended to analyze the causes of children mortality on the basis of Mortality Report Data from 1982 through 1993. The major findings of the study are as follows: Under one year old group: The congenital abnormality and perinatal diseases increase whild infection and parasistic diseases, respiratory diseases, cardiovascular disease, digestive diseases and unknown symptoms and diagnosis decreases. Age group of 1-4: The congenital abnormality, injury and poisoning and neoplasm increases and the decreasing trend is similar to that of under one year old group. Age group of 5-14: increasing and decreasing trend are similar to those of 1-4 age group. The neoplasm of 0-4 and 5-14 age group is increasing faster than other diseases. The ten major death causes of children are found to be follows: 1) accidents, 2) congenital abnormality, 3) neoplasm, 4) pneumonia & bronchitis, 5) perinatal diseases, 6) cerebral palsy and paralysistic diseases, 7) heart diseases, 8) meningitis, 9) homicide, and 10) cerobrovascular diseases.
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