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박정호,Park, Jeong-Ho 한국과학기술단체총연합회 1996 과학과 기술 Vol.29 No.9
우리나라에서 '과학'이라는 용어는 서양보다 협소한 개념으로 쓰이고 있다. 한국사에서 과학은 항상 생산성의 향상과 연결되어야 그 정당성을 인정받을 수 있었다. 그러나 과학기술의 선진화는 국민의 삶의 향상에 기여해야 한다. 또한 시민사회에 요구되는 삶의 질 향상에 기여하는 사회지표에 관련된 연구개발이 정책개발과 주요과제 사업에 추가되어야 할 것이다.
박정호,성진욱,박제철,Park, Jeong-Ho,Seong, Jin-Uk,Park, Je-Chul 한국건설순환자원학회 2013 한국건설순환자원학회 논문집 Vol.1 No.1
본 연구는 순환골재에서 발생하는 오염물질의 특성과 오염 가능성을 평가하기 위해 생산제품 순환골재(RA-1)와 현장 순환골재(RA-2)의 용출시험을 실시하였다. 순환골재의 pH, Conductivity, 중금속 함량은 RA-2 보다 RA-1이 높게 나타났다. 용출시험결과, 순환골재로부터 용출되는 오염물질은 입경이 작을수록 높게 나타났다. 순환골재의 pH는 9.0~12.3으로 강알칼리성으로 나타났고, Conductivity는 10mm 이하에서 높게 나타났다. 중금속은 KSLT의 용출기준을 만족하였고, 순환골재로부터 약 10% 이하로 용출되었다. 순환골재의 수질 오염 가능성을 평가한 결과, 오염 가능성이 매우 높은 항목에는 pH, 오염 가능성이 낮은 항목에는 Conductivity, Turbidity, 오염 가능성이 매우 낮은 항목에는 중금속으로 나타났다. This study was on leaching test(KSLT, TCLP) of the aggregate for the products(RA-1) and for the site(RA-2) to evaluate the characteristics of contaminants and the possibility of contamination arising from the aggregate. On the basis pH, conductivity and heavy metal contents in the aggregate, RA-1 indicated higher than RA-2. As a result of the leaching test, the pollutants were eluted from the aggregate increased as the particle size of the aggregate was smaller. The pH in the aggregate had a strong alkali by a pH value of 9.0~12.3, the conductivity was higher in less than 10mm RA-1 due to the leaching of dissolved inorganic ions. The heavy metals satisfied the leaching standards of KSLT and less 10% was eluted from the aggregate. As a result of evaluating water pollution possibility of the aggregate, the pH displayed in items with a very high possibility of contamination, conductivity and turbidity did in item with a low possibility of contamination and on the other hand the heavy metals did in item with a very low possibility of contamination.
급성 복통 응급환자에게 복부 컴퓨터 단층 촬영술을 시행할 때 금식이 꼭 필요한가?
박정호,이중의,김규석,신중호 대한응급의학회 2008 大韓應急醫學會誌 Vol.19 No.3
Purpose: We tried to determine whether six-hour fasting before abdominal computed tomography (CT) scan is necessary to prevent aspiration of gastric contents in patients with acute abdominal pain. Methods: Adult patients with acute abdominal pain who were checked abdominal CT were enrolled. Exclusion criteria were age <15 years, pregnancy, traumatic cause of symptoms, chronic pain(>7 days), renal impairment and hypersensitivity to contrast media. We compared Group-I (<6-hour fasting) with Group-II(≥6-hour fasting). We collected the demographic and clinical data on the causes of abdominal pain, pain duration, presence of nausea and vomiting, and use of medications before and after abdominal CT. In order to estimate the volume of gastric contents, we measured the area on the CT image which showed the largest volume of gastric contents. Results: Among the 122 patients, Group-I consisted of 38 patients(31.1%) and Group-II included 84(68.9%). The demographic makeups of the two groups were similar, except for gender proportion (more males in Group-I). Group -I showed significantly greater gastric contents compared than Group-II(46.8±32.1 vs. 33.7±28.3, p=0.024). A slightly negative correlation (r=-0.2313; 95% CI=-0.3929 to -0.0559) was observed between the fasting time and the volume of gastric contents. However, the frequencies of the nausea [13/38 (34.2%) vs. 26/84 (31%), p=0.721] and vomiting [6/38 (15.8%) vs. 18/84 (21.4%), p=0.468] showed no difference between two groups. There were no aspiration events in either groups. Conclusion: Six hours of fasting before abdominal CT may not be required to prevent aspiration of gastric contents in patients with acute abdominal pain.