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전해성,박준규,김건하 대한상하수도학회 2023 상하수도학회지 Vol.37 No.6
This study presents a novel method for addressing the issue of high-concentration contaminants (ammonium, phosphate, antibiotics) in leachate arising from decomposing livestock carcasses. Antibiotics, developed to eliminate microorganisms, often have low biodegradability and can persist in the ecosystem. This research proposes design elements to prevent contamination spread from carcass burial sites. The adsorbents used were low-grade charcoal (an industrial by-product), Alum-based Adsorbent (ABA), and Zeolite, a natural substance. These effectively removed the main leachate contaminants: low-grade charcoal for antibiotics (initial concentration 1.05 mg/L, removal rate 73.4%), ABA for phosphate (initial concentration 2.53 mg/L, removal rate 99.9%), and zeolite for ammonium (initial concentration 38.92 mg/L, removal rate 100.0%). The optimal mix ratio for purifying leachate is 1:1:10 of low-grade charcoal, ABA, and zeolite. The average adsorbent usage per burial site was 1,800 kg, costing KRW 2,000,000 per ton. The cost for the minimum leachate volume (about 12.4 m 3 ) per site is KRW 2,880,000, and for the maximum volume (about 19.7 m 3 ) is KRW 4,620,000. These findings contribute to resolving issues related to livestock carcass burial sites and suggest post-management strategies by advocating for the effective use of adsorbents in leachate purification.
2008~2014년까지 청소년건강행태 온라인조사를 활용하여 흡연ㆍ음주ㆍ약물사용이 청소년 자살생각에 미치는 영향
전해성 한국학교보건학회 2015 韓國學校保健學會誌 Vol.28 No.2
Purpose: This study aims to investigate the association between suicidal thoughts and the co-occurrence of alcohol, tobacco, and drug use among adolescents. Methods: This study used the data of the Korea Youth Risk Behavior Web-based Survey from 2008 through 2014. The subjects of this study were 517,866 students, in total (Male 266,500, Female 251,366). Frequency analysis was conducted on the data about the subjects’ general characteristics and their experience of smoking, drinking, and drug use. The relationship between suicidal thoughts and the co-occurrence of alcohol, tobacco, and drug use was analyzed through x2-test and logistic regression. The analyses were done using SAS 9.4. Results: According to the study, adolescents who used alcohol, cigarettes, and drugs at the same time engaged in suicidal ideation 3.69 times more than their peers who didn’t use such substances (95% CI: 3.40~4.00, p<.001). Also, adolescents who used only tobacco, only alcohol, and only drugs engaged in suicidal ideation 1.49 times (95% CI: 1.43~1.56, p<.001), 1.28 times (95% CI: 1.26~1.31, p<.001) and 2.34 times (95% CI: 2.04~2.69, p<.001) more than the students who didn’t use any substances, respectively. Conclusion: Adolescents’ suicidal ideation and the co-occurrence of alcohol, tobacco, and drug use had a statistically significant relationship.
김병성,전해성,차인준 인제대학교 지역사회의학연구소 1995 硏究論文集 Vol.1 No.-
The symptoms of farmer's syndrome that occurred to Korean farmers are due to the specific characteristics of Korean agriculture, and the basic reasons are poverty and less-privileged rural cultural life originated from social and political conditions. Then the purposes of this study are to investigate farmer's syndrome of farmers and to get substantial data to make a strategy that could prevent diseases. The results are as follows : 1. The most common symptom was lumbago(83.0%) among the 7 kinds of symptoms of farmer's syndrome. And it was more common among women who deliver babies and also work house chores and in farms than men(p$lt;0.05). 2. The numbers of symptoms of farmer's syndrome increased as age increases and, 71.4% of those aged 70-79 complained some of the symptoms. 3. The accident rate due to agricultural machine was significantly higher in men than women(p$lt;0.05). By frequency contusion was the most common trauma, fall, fracture were the nexts, and the age group with highest accident rate(40%) was those aged 20-29. 4. To see the significantly correlated factors between farmer's syndrome and sociodemo-graphic variables, the more the numbers of family members were, the more lumbago and the less heartburn occurred. And the less gross income was the more frequent nocturnal urinary frequency occurred, and the wider the farming land was the more frequent noctural urinary frequency occurred. 5. As result of correlation coefficient between the numbers of illnesses and sociodemographic variables, the larger the family was and the larger the farming land was the more illnesses the subjects had, and those without spouses had more illnesses.
추태호,심상보,전해성,추연문 한국방재학회 2019 한국방재학회논문집 Vol.19 No.6
해상이나 친수영역에서 구조물의 설계, 시공, 관리에 있어서 정확한 조위의 산정은 매우 중요하다. 그러나 종래의 조위예측은 천문학적 인자만을 고려하여 예보하고 있으며 이는 폭풍 해일, 해양기상 등에 의해 발생하는 이상조위를 예측하는 것은 어려움이 따른다. 그리하여 본 연구에서는 해양의 인자들을 고려한 정확한 조위의 예측을 위한 예측함수를 제시하였다. 동해연안지역을 연구대상지로 하여, 국립해양조사원의 조위관측소 3곳에서 수집한 과거의 예측 데이터와 실측 데이터를 사용하고 기상청의 국내등표, 국내부이 관측소에서 풍속, 파고 및 파주기 등의 해상인자를 고려하였다. 로지스틱 회귀분석을 통하여 관측소별 이상조위 발생여부를 예측하였고, 다중회귀분석을 통해 새로운 조위예측함수를 제안하였다. 변수를 선정을 위하여 Bayesian Information Criterion (BIC)기법을 활용하였고, k-분할 교차검증과 Normalized-Root Mean Square Error (N-RMSE)를 통한 정확도 검증을 수행하였으며, N-RMSE값은 3.37%~12.03%로 나타났다. 향후 지속적인 기상자료의 축적과 조위관측지점 인근 해양기상자료를 취득한다면 보다 정확한 조위예측이 가능할 것으로 판단된다. The accurate calculation of tide levels is important in the design, construction, and management of structures associated with the sea or water areas. However, conventional tidal predictions only consider astronomical factors. Therefore, it is difficult to predict based on storm surges, oceanic weather and other factors. Herein, we presented a predictive function to accurately determine tide levels by considering marine factors. For the eastern coastal area, past forecasts and survey data were collected from three tide stations at the Korea Hydrographic and Oceanographic Administration. In addition, data of maritime factors such as wind speed, wave height, and wave period were collected from domestic buoy stations at the Korea Meteorological Administration. Logistic regression analysis was conducted to predict the occurrence of abnormal tides, and a new tidal prediction function was proposed through multiple regression analyses. The Bayesian Information Criterion (BIC) method was used to select variables, and accuracy verification through k-division cross-validation and Normalized-Root Mean Square Error (N-RMSE) was performed. For the latter, the values ranged from 3.37% to 12.03%. If continuous meteorological data are accumulated and marine meteorological data are acquired near the tidal observation point, tidal levels can be predicted more accurately.